commit ba5c022325abd682f81e2f88f13ef8846596bd7c
author Willem Jiang <willem.jiang@gmail.com> Wed Dec 11 08:42:27 2019 +0800
committer Willem Jiang <willem.jiang@gmail.com> Wed Dec 11 08:42:27 2019 +0800
tree 930e89ebc9095c50ca30a43f294eadec1e1c3b6f
parent 142ee157b9091f1069f84f00916a093a163cdc2a
parent a7d30655e48627769d79db3816756c8092847f15

Merge branch 'master' into asf-site

.gitignore

diff --git a/.gitignore b/.gitignore
index 2f493e8..655583d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,3 @@
 .DS_Store
 Gemfile.lock
 _site
-content

_data/navigation.yml

diff --git a/_data/navigation.yml b/_data/navigation.yml
index 286081a..902dbf0 100755
--- a/_data/navigation.yml
+++ b/_data/navigation.yml
@@ -25,7 +25,7 @@
             url: /faqs/
             group: "users"
       - title: "Community"
-        url: /developers/contributing/
+        url: /developers/contributing
         group: "developers"
       - title: "Blogs"
         url: /year-archive/
@@ -214,7 +214,7 @@
           url: /cn/faqs/
           group: "users"
       - title: "社区"
-        url: /cn/developers/contributing/
+        url: /cn/developers/contributing
         group: "developers"
       - title: "博文"
         url: /cn/year-archive/

_includes/head.html

diff --git a/_includes/head.html b/_includes/head.html
index 1a7b40c..9c0a004 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -25,8 +25,8 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
 <!-- For all browsers -->
-<link rel="stylesheet" href="{{ '/assets/css/main.css' | absolute_url }}">
-<link rel="stylesheet" href="{{ '/assets/vendor/prism/prism.css' | absolute_url }}">
+<link rel="stylesheet" href="{{ '/assets/css/main.css?v=1' | absolute_url }}">
+<link rel="stylesheet" href="{{ '/assets/vendor/prism/prism.css?v=1' | absolute_url }}">
 
 <!--[if lte IE 9]>
   <style>

_users/cn/metrics-integration-with-prometheus-in-1.0.0-m1.md

diff --git a/_users/cn/metrics-integration-with-prometheus-in-1.0.0-m1.md b/_users/cn/metrics-integration-with-prometheus-in-1.0.0-m1.md
index ad08d49..2bde2ff 100755
--- a/_users/cn/metrics-integration-with-prometheus-in-1.0.0-m1.md
+++ b/_users/cn/metrics-integration-with-prometheus-in-1.0.0-m1.md
@@ -1,5 +1,5 @@
 ---
-title: "1.0.0-m1版本中的监控如何集成普罗米修斯"
+title: "1.0.0-m1版本中的监控如何集成prometheus"
 lang: cn
 ref: metrics
 permalink: /cn/docs/users/metrics-integration-with-prometheus-in-1.0.0-m1/
@@ -13,7 +13,7 @@
 微服务框架从0.5.0版本开始支持监控功能Metrics，1.0.0-m1版本正式发布，请通过查看用户手册和[Release Note](https://github.com/apache/servicecomb-java-chassis/releases)获取更多信息，我们也会继续追加新特性新功能，欢迎订阅ServiceComb邮件列表(dev-subscribe@servicecomb.apache.org)参与讨论。
 
 ## 背景
-[普罗米修斯](http://www.prometheus.io/)是相似于Google Borgmon的一个开源监控系统，也是[CNCF](https://www.cncf.io/)的成员之一，目前社区非常活跃，Java Chassis Metrics在1.0.0-m1中支持对接普罗米修斯，并进一步实现使用[Grafana](https://grafana.com/)查询Metrics数据。
+[prometheus](http://www.prometheus.io/)是相似于Google Borgmon的一个开源监控系统，也是[CNCF](https://www.cncf.io/)的成员之一，目前社区非常活跃，Java Chassis Metrics在1.0.0-m1中支持对接prometheus，并进一步实现使用[Grafana](https://grafana.com/)查询Metrics数据。
 
 ## 对接原理
 由于Java Chassis由Java语言开发，我们使用[prometheus java client](https://github.com/prometheus/client_java)中的Simple Client作为对接SDK，版本为0.1.0。  
@@ -37,7 +37,7 @@
 因此一旦集成Prometheus引入了metrics-prometheus依赖后，不再需要添加metrics-core的依赖。
 
 ## 如何配置
-开启对接普罗米修斯非常简单：
+开启对接prometheus非常简单：
 ### 全局配置
 microservice.yaml中有如下配置项：  
 ```yaml 
@@ -120,4 +120,4 @@
 
 为了能够达到更好的查询效果，在Grafana中添加Prometheus作为数据源，通过Grafana查询数据如下图示：
 
-![MetricsInGrafana](/assets/images/MetricsInGrafana.png)  
\ No newline at end of file
+![MetricsInGrafana](/assets/images/MetricsInGrafana.png)  

content/404.html

diff --git a/content/404.html b/content/404.html
new file mode 100644
index 0000000..4bc9c9d
--- /dev/null
+++ b/content/404.html
@@ -0,0 +1,444 @@
+<!doctype html>
+<!--
+  Minimal Mistakes Jekyll Theme 4.4.1 by Michael Rose
+  Copyright 2017 Michael Rose - mademistakes.com | @mmistakes
+  Free for personal and commercial use under the MIT license
+  https://github.com/mmistakes/minimal-mistakes/blob/master/LICENSE.txt
+-->
+<html lang="en" class="no-js">
+  <head>
+    <meta charset="utf-8">
+
+<!-- begin SEO -->
+
+
+
+
+
+
+
+
+
+<title>Page Not Found - Apache ServiceComb</title>
+
+
+
+
+<meta name="description" content="Page not found. Your pixels are in another canvas.">
+
+
+
+
+<meta name="author" content="">
+
+<meta property="og:locale" content="en">
+<meta property="og:site_name" content="Apache ServiceComb">
+<meta property="og:title" content="Page Not Found">
+
+
+  <link rel="canonical" href="https://github.com/pages/apache/incubator-servicecomb-website/404.html">
+  <meta property="og:url" content="https://github.com/pages/apache/incubator-servicecomb-website/404.html">
+
+
+
+  <meta property="og:description" content="Page not found. Your pixels are in another canvas.">
+
+
+
+  <meta name="twitter:site" content="@ServiceComb">
+  <meta name="twitter:title" content="Page Not Found">
+  <meta name="twitter:description" content="Page not found. Your pixels are in another canvas.">
+  <meta name="twitter:url" content="">
+
+  
+    <meta name="twitter:card" content="summary">
+    
+  
+
+  
+
+
+
+  
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+  <script type="application/ld+json">
+    {
+      "@context" : "http://schema.org",
+      "@type" : "Person",
+      "name" : "Apache ServiceComb",
+      "url" : "https://github.com/pages/apache/incubator-servicecomb-website",
+      "sameAs" : null
+    }
+  </script>
+
+
+
+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
+
+
+
+
+<!-- end SEO -->
+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
+<!-- http://t.co/dKP3o1e -->
+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+<script>
+  document.documentElement.className = document.documentElement.className.replace(/\bno-js\b/g, '') + ' js ';
+</script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>
+<script src="/assets/vendor/prism/prism.js"></script>
+
+<script type="text/javascript" async
+  src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML">
+</script>
+
+<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
+<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
+<!-- For all browsers -->
+<link rel="stylesheet" href="/assets/css/main.css?v=1">
+<link rel="stylesheet" href="/assets/vendor/prism/prism.css?v=1">
+
+<!--[if lte IE 9]>
+  <style>
+    /* old IE unsupported flexbox fixes */
+    .greedy-nav .site-title {
+      padding-right: 3em;
+    }
+    .greedy-nav button {
+      position: absolute;
+      top: 0;
+      right: 0;
+      height: 100%;
+    }
+  </style>
+<![endif]-->
+
+<meta http-equiv="cleartype" content="on">
+
+    <!-- start custom head snippets -->
+
+<!-- insert favicons. use http://realfavicongenerator.net/ -->
+<link href="https://fonts.cat.net/css?family=Roboto:400,500,700|Source+Code+Pro" rel="stylesheet">
+<script src="/assets/js/custom.js"></script>
+<!-- end custom head snippets -->
+
+  </head>
+
+  <body class="layout--single">
+
+    <!--[if lt IE 9]>
+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->
+    <div class="masthead" onmouseleave="$('#childrenShow').css('display', 'none')">
+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/">Home</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/developers/">Projects</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+            <li class="def-nav-li" onmouseenter="$('#childrenShow').css('display', 'block')">
+              
+              
+              
+
+              
+                <a href="/docs/users/">Documentation</a>
+              
+
+              <ul id="childrenShow" class="def-children-show" onmouseleave="$('#childrenShow').css('display', 'none')">
+                
+                <li><a href="/docs/getting-started/" class="">Get started</a></li>
+                
+                <li><a href="/docs/users/" class="">Docs</a></li>
+                
+                <li><a href="/slides/" class="">Video</a></li>
+                
+                <li><a href="/faqs/" class="">FAQ</a></li>
+                
+              </ul>
+            </li>
+          
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/developers/contributing">Community</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/year-archive/">Blogs</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/release/">Downloads</a>
+                
+              </li>
+            
+          
+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
+          
+            
+            <a href=/cn/404.html>中文</a>
+          
+        </div>
+      </nav>
+    </div>
+  </div>
+</div>
+
+
+    
+
+
+
+<div id="main" role="main">
+  
+  <div class="sidebar sticky">
+      
+      <div class="back-to-home"><a href="/">Home</a> > Page Not Found</div>
+      
+  
+  
+    
+      
+      
+      
+    
+    
+      
+
+<nav class="nav__list">
+  
+  <input id="ac-toc" name="accordion-toc" type="checkbox" />
+  <label for="ac-toc">Toggle Menu</label>
+  <ul class="nav__items">
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Page Not Found">
+    <meta itemprop="description" content="Page not found. Your pixels are in another canvas.">
+    
+    
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Page Not Found
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Sorry, but the page you were trying to view does not exist — perhaps you can try searching for it below.</p>
+
+<script type="text/javascript">
+  var GOOG_FIXURL_LANG = 'en';
+  var GOOG_FIXURL_SITE = ''
+</script>
+
+<script type="text/javascript" src="//linkhelp.clients.google.com/tbproxy/lh/wm/fixurl.js">
+</script>
+
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
+
+
+        
+      </footer>
+
+      
+
+      
+
+    </div>
+
+    
+  </article>
+
+  
+  
+</div>
+
+
+    <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
+    <div align="center" style="margin: 0 0;">
+    <ins class="adsbygoogle"
+         style="display:block; border-bottom: initial;"
+         data-ad-client="ca-pub-7328585512091257"
+         data-ad-slot="3049671934"
+         data-ad-format="auto"></ins>
+    </div>
+
+    <div class="page__footer">
+      <footer>
+        <!-- start custom footer snippets -->
+
+<!-- end custom footer snippets -->
+
+        <div class="container">
+  <div class="row justify-content-md-center">
+    
+    <div class="col">
+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Get started</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_pages/404.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
+        </li>
+      </ul>
+    </div>
+  </div>
+</div>
+<div class="page__footer-bottom">
+  <div>&copy; 2019 Apache ServiceComb. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>
+  <div>All other marks mentioned may be trademarks or registered trademarks of their respective owners.</div>
+</div>
+
+      </footer>
+    </div>
+
+    <script src="/assets/js/main.min.js"></script>
+
+
+
+
+  <script>
+  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+
+  ga('create', 'UA-101622733-1', 'auto');
+  ga('send', 'pageview');
+</script>
+
+
+
+
+
+
+
+  </body>
+</html>

content/CNAME

diff --git a/content/CNAME b/content/CNAME
new file mode 100644
index 0000000..115fa88
--- /dev/null
+++ b/content/CNAME
@@ -0,0 +1 @@
+servicecomb.io
\ No newline at end of file

content/DISCLAIMER

diff --git a/content/DISCLAIMER b/content/DISCLAIMER
new file mode 100644
index 0000000..2e9ded2
--- /dev/null
+++ b/content/DISCLAIMER
@@ -0,0 +1 @@
+Apache ServiceComb（incubating）is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.

content/NOTICE

diff --git a/content/NOTICE b/content/NOTICE
new file mode 100644
index 0000000..dfbbc71
--- /dev/null
+++ b/content/NOTICE
@@ -0,0 +1,5 @@
+Apache ServiceComb Website
+Copyright 2017-2018 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).

content/assets/css/main.css

diff --git a/content/assets/css/main.css b/content/assets/css/main.css
new file mode 100644
index 0000000..236e9c8
--- /dev/null
+++ b/content/assets/css/main.css
@@ -0,0 +1,8 @@
+/*!
+ * Minimal Mistakes Jekyll Theme 4.4.1 by Michael Rose
+ * Copyright 2017 Michael Rose - mademistakes.com | @mmistakes
+ * Licensed under MIT (https://github.com/mmistakes/minimal-mistakes/blob/master/LICENSE.txt)
+*/@font-face{font-family:CustomSerifFont;font-weight:400;src:local("PingFangSC"),local("Microsoft Yahei"),local("WenQuanYi Micro Hei"),local("Noto Sans Mono CJK SC"),local(Helvetica),local(Arial)}@font-face{font-family:CustomSerifFont;font-weight:400;unicode-range:U+00-024F;src:local("Roboto"),local(Helvetica),local(Arial)}/*!
+ *  Font Awesome 4.7.0 by @davegandy - http://fontawesome.io - @fontawesome
+ *  License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
+ */@font-face{font-family:'FontAwesome';src:url("../vendor/font-awesome/fontawesome-webfont.eot?v=4.7.0");src:url("../vendor/font-awesome/fontawesome-webfont.eot?#iefix&v=4.7.0") format("embedded-opentype"),url("../vendor/font-awesome/fontawesome-webfont.woff2?v=4.7.0") format("woff2"),url("../vendor/font-awesome/fontawesome-webfont.woff?v=4.7.0") format("woff"),url("../vendor/font-awesome/fontawesome-webfont.ttf?v=4.7.0") format("truetype"),url("../vendor/font-awesome/fontawesome-webfont.svg?v=4.7.0#fontawesomeregular") format("svg");font-weight:normal;font-style:normal}.fa{display:inline-block;font:normal normal normal 14px/1 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content/assets/css/style.css

diff --git a/content/assets/css/style.css b/content/assets/css/style.css
new file mode 100644
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--- /dev/null
+++ b/content/assets/css/style.css
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content/assets/images/zipkin/zipkin-track-bmi.png

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content/assets/images/zipkin/zipkin-track-span.png

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content/assets/images/zuul/demo-dir.png

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content/assets/images/zuul/demo-helloservice-start.png

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content/assets/images/zuul/demo-run.png

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content/assets/images/zuul/demo-servicecenter-console1.png

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content/assets/images/zuul/demo-servicecenter-console2.png

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content/assets/images/zuul/demo-theory.png

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content/assets/images/zuul/demo-zuulservice-start.jpg

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content/assets/js/custom.js

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new file mode 100644
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content/assets/vendor/font-awesome/fontawesome-webfont.woff

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new file mode 100644
index 0000000..400014a
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content/assets/vendor/font-awesome/fontawesome-webfont.woff2

diff --git a/content/assets/vendor/font-awesome/fontawesome-webfont.woff2 b/content/assets/vendor/font-awesome/fontawesome-webfont.woff2
new file mode 100644
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content/assets/vendor/prism/prism.css

diff --git a/content/assets/vendor/prism/prism.css b/content/assets/vendor/prism/prism.css
new file mode 100644
index 0000000..2e72935
--- /dev/null
+++ b/content/assets/vendor/prism/prism.css
@@ -0,0 +1,367 @@
+/* http://prismjs.com/download.html?themes=prism-coy&languages=markup+clike+javascript+bash+batch+c+csharp+cpp+docker+git+go+java+json+markdown+protobuf+yaml&plugins=line-highlight+line-numbers+file-highlight+toolbar+highlight-keywords+copy-to-clipboard */
+/**
+ * prism.js Coy theme for JavaScript, CoffeeScript, CSS and HTML
+ * Based on https://github.com/tshedor/workshop-wp-theme (Example: http://workshop.kansan.com/category/sessions/basics or http://workshop.timshedor.com/category/sessions/basics);
+ * @author Tim  Shedor
+ */
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: black;
+	background: none;
+	font-family: 'PingFangSC', 'Source Code Pro', 'Droid Sans Mono', Consolas, 'Andale Mono', 'Ubuntu Mono', monospace;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
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+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	position: relative;
+	margin: .5em 0;
+	box-shadow: -1px 0px 0px 0px #358ccb, 0px 0px 0px 1px #dfdfdf;
+	border-left: 10px solid #358ccb;
+	background-color: #fdfdfd;
+	background-image: linear-gradient(transparent 50%, rgba(69, 142, 209, 0.04) 50%);
+	background-size: 3em 3em;
+	background-origin: content-box;
+	overflow: visible;
+	padding: 0;
+}
+
+code[class*="language"] {
+	max-height: inherit;
+	height: 100%;
+	padding: 0 1em;
+	display: block;
+	overflow: auto;
+}
+
+/* Margin bottom to accomodate shadow */
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background-color: #fdfdfd;
+	-webkit-box-sizing: border-box;
+	-moz-box-sizing: border-box;
+	box-sizing: border-box;
+	margin-bottom: 1em;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	position: relative;
+	padding: .2em;
+	border-radius: 0.3em;
+	color: #c92c2c;
+	border: 1px solid rgba(0, 0, 0, 0.1);
+	display: inline;
+	white-space: normal;
+}
+
+pre[class*="language-"]:before,
+pre[class*="language-"]:after {
+	content: '';
+	z-index: -2;
+	display: block;
+	position: absolute;
+	bottom: 0.75em;
+	left: 0.18em;
+	width: 40%;
+	height: 20%;
+	max-height: 13em;
+	box-shadow: 0px 13px 8px #979797;
+	-webkit-transform: rotate(-2deg);
+	-moz-transform: rotate(-2deg);
+	-ms-transform: rotate(-2deg);
+	-o-transform: rotate(-2deg);
+	transform: rotate(-2deg);
+}
+
+:not(pre) > code[class*="language-"]:after,
+pre[class*="language-"]:after {
+	right: 0.75em;
+	left: auto;
+	-webkit-transform: rotate(2deg);
+	-moz-transform: rotate(2deg);
+	-ms-transform: rotate(2deg);
+	-o-transform: rotate(2deg);
+	transform: rotate(2deg);
+}
+
+.token.comment,
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+	color: #7D8B99;
+}
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+	color: #5F6364;
+}
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+	color: #c92c2c;
+}
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+.token.function,
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+	color: #2f9c0a;
+}
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+	color: #a67f59;
+	background: rgba(255, 255, 255, 0.5);
+}
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+	color: #1990b8;
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+}
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+	color: #a67f59;
+	background: rgba(255, 255, 255, 0.5);
+}
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+	font-weight: normal;
+}
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+	font-weight: bold;
+}
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+	font-style: italic;
+}
+
+.token.entity {
+	cursor: help;
+}
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+.namespace {
+	opacity: .7;
+}
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+@media screen and (max-width: 767px) {
+	pre[class*="language-"]:before,
+	pre[class*="language-"]:after {
+		bottom: 14px;
+		box-shadow: none;
+	}
+
+}
+
+/* Plugin styles */
+.token.tab:not(:empty):before,
+.token.cr:before,
+.token.lf:before {
+	color: #e0d7d1;
+}
+
+/* Plugin styles: Line Numbers */
+pre[class*="language-"].line-numbers {
+	padding-left: 0;
+}
+
+pre[class*="language-"].line-numbers code {
+	padding-left: 3.8em;
+}
+
+pre[class*="language-"].line-numbers .line-numbers-rows {
+	left: 0;
+}
+
+/* Plugin styles: Line Highlight */
+pre[class*="language-"][data-line] {
+	padding-top: 0;
+	padding-bottom: 0;
+	padding-left: 0;
+}
+pre[data-line] code {
+	position: relative;
+	padding-left: 4em;
+}
+pre .line-highlight {
+	margin-top: 0;
+}
+
+pre[data-line] {
+	position: relative;
+	padding: 1em 0 1em 3em;
+}
+
+.line-highlight {
+	position: absolute;
+	left: 0;
+	right: 0;
+	padding: inherit 0;
+	margin-top: 1em; /* Same as .prism’s padding-top */
+
+	background: hsla(24, 20%, 50%,.08);
+	background: linear-gradient(to right, hsla(24, 20%, 50%,.1) 70%, hsla(24, 20%, 50%,0));
+
+	pointer-events: none;
+
+	line-height: inherit;
+	white-space: pre;
+}
+
+	.line-highlight:before,
+	.line-highlight[data-end]:after {
+		content: attr(data-start);
+		position: absolute;
+		top: .4em;
+		left: .6em;
+		min-width: 1em;
+		padding: 0 .5em;
+		background-color: hsla(24, 20%, 50%,.4);
+		color: hsl(24, 20%, 95%);
+		font: bold 65%/1.5 sans-serif;
+		text-align: center;
+		vertical-align: .3em;
+		border-radius: 999px;
+		text-shadow: none;
+		box-shadow: 0 1px white;
+	}
+
+	.line-highlight[data-end]:after {
+		content: attr(data-end);
+		top: auto;
+		bottom: .4em;
+	}
+
+pre.line-numbers {
+	position: relative;
+	padding-left: 3.8em;
+	counter-reset: linenumber;
+}
+
+pre.line-numbers > code {
+	position: relative;
+}
+
+.line-numbers .line-numbers-rows {
+	position: absolute;
+	pointer-events: none;
+	top: 0;
+	font-size: 100%;
+	left: -3.8em;
+	width: 3em; /* works for line-numbers below 1000 lines */
+	letter-spacing: -1px;
+	border-right: 1px solid #999;
+
+	-webkit-user-select: none;
+	-moz-user-select: none;
+	-ms-user-select: none;
+	user-select: none;
+
+}
+
+	.line-numbers-rows > span {
+		pointer-events: none;
+		display: block;
+		counter-increment: linenumber;
+	}
+
+		.line-numbers-rows > span:before {
+			content: counter(linenumber);
+			color: #999;
+			display: block;
+			padding-right: 0.8em;
+			text-align: right;
+		}
+pre.code-toolbar {
+	position: relative;
+}
+
+pre.code-toolbar > .toolbar {
+	position: absolute;
+	top: .3em;
+	right: .2em;
+	transition: opacity 0.3s ease-in-out;
+	opacity: 0;
+}
+
+pre.code-toolbar:hover > .toolbar {
+	opacity: 1;
+}
+
+pre.code-toolbar > .toolbar .toolbar-item {
+	display: inline-block;
+}
+
+pre.code-toolbar > .toolbar a {
+	cursor: pointer;
+}
+
+pre.code-toolbar > .toolbar button {
+	background: none;
+	border: 0;
+	color: inherit;
+	font: inherit;
+	line-height: normal;
+	overflow: visible;
+	padding: 0;
+	-webkit-user-select: none; /* for button */
+	-moz-user-select: none;
+	-ms-user-select: none;
+}
+
+pre.code-toolbar > .toolbar a,
+pre.code-toolbar > .toolbar button,
+pre.code-toolbar > .toolbar span {
+	color: #bbb;
+	font-size: .8em;
+	padding: 0 .5em;
+	background: #f5f2f0;
+	background: rgba(224, 224, 224, 0.2);
+	box-shadow: 0 2px 0 0 rgba(0,0,0,0.2);
+	border-radius: .5em;
+}
+
+pre.code-toolbar > .toolbar a:hover,
+pre.code-toolbar > .toolbar a:focus,
+pre.code-toolbar > .toolbar button:hover,
+pre.code-toolbar > .toolbar button:focus,
+pre.code-toolbar > .toolbar span:hover,
+pre.code-toolbar > .toolbar span:focus {
+	color: inherit;
+	text-decoration: none;
+}
+

content/assets/vendor/prism/prism.js

diff --git a/content/assets/vendor/prism/prism.js b/content/assets/vendor/prism/prism.js
new file mode 100644
index 0000000..b349530
--- /dev/null
+++ b/content/assets/vendor/prism/prism.js
@@ -0,0 +1,24 @@
+/* http://prismjs.com/download.html?themes=prism-coy&languages=markup+clike+javascript+bash+batch+c+csharp+cpp+docker+git+go+java+json+markdown+protobuf+yaml&plugins=line-highlight+line-numbers+file-highlight+toolbar+highlight-keywords+copy-to-clipboard */
+var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(){var e=/\blang(?:uage)?-(\w+)\b/i,t=0,n=_self.Prism={manual:_self.Prism&&_self.Prism.manual,util:{encode:function(e){return e instanceof a?new a(e.type,n.util.encode(e.content),e.alias):"Array"===n.util.type(e)?e.map(n.util.encode):e.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).match(/\[object (\w+)\]/)[1]},objId:function(e){return e.__id||Object.defineProperty(e,"__id",{value:++t}),e.__id},clone:function(e){var t=n.util.type(e);switch(t){case"Object":var a={};for(var r in e)e.hasOwnProperty(r)&&(a[r]=n.util.clone(e[r]));return a;case"Array":return e.map&&e.map(function(e){return n.util.clone(e)})}return e}},languages:{extend:function(e,t){var a=n.util.clone(n.languages[e]);for(var r in t)a[r]=t[r];return a},insertBefore:function(e,t,a,r){r=r||n.languages;var i=r[e];if(2==arguments.length){a=arguments[1];for(var l in a)a.hasOwnProperty(l)&&(i[l]=a[l]);return i}var o={};for(var s in i)if(i.hasOwnProperty(s)){if(s==t)for(var l in a)a.hasOwnProperty(l)&&(o[l]=a[l]);o[s]=i[s]}return n.languages.DFS(n.languages,function(t,n){n===r[e]&&t!=e&&(this[t]=o)}),r[e]=o},DFS:function(e,t,a,r){r=r||{};for(var i in e)e.hasOwnProperty(i)&&(t.call(e,i,e[i],a||i),"Object"!==n.util.type(e[i])||r[n.util.objId(e[i])]?"Array"!==n.util.type(e[i])||r[n.util.objId(e[i])]||(r[n.util.objId(e[i])]=!0,n.languages.DFS(e[i],t,i,r)):(r[n.util.objId(e[i])]=!0,n.languages.DFS(e[i],t,null,r)))}},plugins:{},highlightAll:function(e,t){var a={callback:t,selector:'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'};n.hooks.run("before-highlightall",a);for(var r,i=a.elements||document.querySelectorAll(a.selector),l=0;r=i[l++];)n.highlightElement(r,e===!0,a.callback)},highlightElement:function(t,a,r){for(var i,l,o=t;o&&!e.test(o.className);)o=o.parentNode;o&&(i=(o.className.match(e)||[,""])[1].toLowerCase(),l=n.languages[i]),t.className=t.className.replace(e,"").replace(/\s+/g," ")+" language-"+i,o=t.parentNode,/pre/i.test(o.nodeName)&&(o.className=o.className.replace(e,"").replace(/\s+/g," ")+" language-"+i);var s=t.textContent,u={element:t,language:i,grammar:l,code:s};if(n.hooks.run("before-sanity-check",u),!u.code||!u.grammar)return u.code&&(n.hooks.run("before-highlight",u),u.element.textContent=u.code,n.hooks.run("after-highlight",u)),n.hooks.run("complete",u),void 0;if(n.hooks.run("before-highlight",u),a&&_self.Worker){var g=new Worker(n.filename);g.onmessage=function(e){u.highlightedCode=e.data,n.hooks.run("before-insert",u),u.element.innerHTML=u.highlightedCode,r&&r.call(u.element),n.hooks.run("after-highlight",u),n.hooks.run("complete",u)},g.postMessage(JSON.stringify({language:u.language,code:u.code,immediateClose:!0}))}else u.highlightedCode=n.highlight(u.code,u.grammar,u.language),n.hooks.run("before-insert",u),u.element.innerHTML=u.highlightedCode,r&&r.call(t),n.hooks.run("after-highlight",u),n.hooks.run("complete",u)},highlight:function(e,t,r){var i=n.tokenize(e,t);return a.stringify(n.util.encode(i),r)},matchGrammar:function(e,t,a,r,i,l,o){var s=n.Token;for(var u in a)if(a.hasOwnProperty(u)&&a[u]){if(u==o)return;var g=a[u];g="Array"===n.util.type(g)?g:[g];for(var c=0;c<g.length;++c){var h=g[c],f=h.inside,d=!!h.lookbehind,m=!!h.greedy,p=0,y=h.alias;if(m&&!h.pattern.global){var v=h.pattern.toString().match(/[imuy]*$/)[0];h.pattern=RegExp(h.pattern.source,v+"g")}h=h.pattern||h;for(var b=r,k=i;b<t.length;k+=t[b].length,++b){var w=t[b];if(t.length>e.length)return;if(!(w instanceof s)){h.lastIndex=0;var _=h.exec(w),P=1;if(!_&&m&&b!=t.length-1){if(h.lastIndex=k,_=h.exec(e),!_)break;for(var A=_.index+(d?_[1].length:0),j=_.index+_[0].length,x=b,O=k,S=t.length;S>x&&(j>O||!t[x].type&&!t[x-1].greedy);++x)O+=t[x].length,A>=O&&(++b,k=O);if(t[b]instanceof s||t[x-1].greedy)continue;P=x-b,w=e.slice(k,O),_.index-=k}if(_){d&&(p=_[1].length);var A=_.index+p,_=_[0].slice(p),j=A+_.length,N=w.slice(0,A),C=w.slice(j),E=[b,P];N&&(++b,k+=N.length,E.push(N));var L=new s(u,f?n.tokenize(_,f):_,y,_,m);if(E.push(L),C&&E.push(C),Array.prototype.splice.apply(t,E),1!=P&&n.matchGrammar(e,t,a,b,k,!0,u),l)break}else if(l)break}}}}},tokenize:function(e,t){var a=[e],r=t.rest;if(r){for(var i in r)t[i]=r[i];delete t.rest}return n.matchGrammar(e,a,t,0,0,!1),a},hooks:{all:{},add:function(e,t){var a=n.hooks.all;a[e]=a[e]||[],a[e].push(t)},run:function(e,t){var a=n.hooks.all[e];if(a&&a.length)for(var r,i=0;r=a[i++];)r(t)}}},a=n.Token=function(e,t,n,a,r){this.type=e,this.content=t,this.alias=n,this.length=0|(a||"").length,this.greedy=!!r};if(a.stringify=function(e,t,r){if("string"==typeof e)return e;if("Array"===n.util.type(e))return e.map(function(n){return a.stringify(n,t,e)}).join("");var i={type:e.type,content:a.stringify(e.content,t,r),tag:"span",classes:["token",e.type],attributes:{},language:t,parent:r};if("comment"==i.type&&(i.attributes.spellcheck="true"),e.alias){var l="Array"===n.util.type(e.alias)?e.alias:[e.alias];Array.prototype.push.apply(i.classes,l)}n.hooks.run("wrap",i);var o=Object.keys(i.attributes).map(function(e){return e+'="'+(i.attributes[e]||"").replace(/"/g,"&quot;")+'"'}).join(" ");return"<"+i.tag+' class="'+i.classes.join(" ")+'"'+(o?" "+o:"")+">"+i.content+"</"+i.tag+">"},!_self.document)return _self.addEventListener?(_self.addEventListener("message",function(e){var t=JSON.parse(e.data),a=t.language,r=t.code,i=t.immediateClose;_self.postMessage(n.highlight(r,n.languages[a],a)),i&&_self.close()},!1),_self.Prism):_self.Prism;var r=document.currentScript||[].slice.call(document.getElementsByTagName("script")).pop();return r&&(n.filename=r.src,!document.addEventListener||n.manual||r.hasAttribute("data-manual")||("loading"!==document.readyState?window.requestAnimationFrame?window.requestAnimationFrame(n.highlightAll):window.setTimeout(n.highlightAll,16):document.addEventListener("DOMContentLoaded",n.highlightAll))),_self.Prism}();"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism);
+Prism.languages.markup={comment:/<!--[\s\S]*?-->/,prolog:/<\?[\s\S]+?\?>/,doctype:/<!DOCTYPE[\s\S]+?>/i,cdata:/<!\[CDATA\[[\s\S]*?]]>/i,tag:{pattern:/<\/?(?!\d)[^\s>\/=$<]+(?:\s+[^\s>\/=]+(?:=(?:("|')(?:\\\1|\\?(?!\1)[\s\S])*\1|[^\s'">=]+))?)*\s*\/?>/i,inside:{tag:{pattern:/^<\/?[^\s>\/]+/i,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"attr-value":{pattern:/=(?:('|")[\s\S]*?(\1)|[^\s>]+)/i,inside:{punctuation:/[=>"']/}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:/&#?[\da-z]{1,8};/i},Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity,Prism.hooks.add("wrap",function(a){"entity"===a.type&&(a.attributes.title=a.content.replace(/&amp;/,"&"))}),Prism.languages.xml=Prism.languages.markup,Prism.languages.html=Prism.languages.markup,Prism.languages.mathml=Prism.languages.markup,Prism.languages.svg=Prism.languages.markup;
+Prism.languages.clike={comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?\*\//,lookbehind:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0}],string:{pattern:/(["'])(\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0},"class-name":{pattern:/((?:\b(?:class|interface|extends|implements|trait|instanceof|new)\s+)|(?:catch\s+\())[a-z0-9_\.\\]+/i,lookbehind:!0,inside:{punctuation:/(\.|\\)/}},keyword:/\b(if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,"boolean":/\b(true|false)\b/,"function":/[a-z0-9_]+(?=\()/i,number:/\b-?(?:0x[\da-f]+|\d*\.?\d+(?:e[+-]?\d+)?)\b/i,operator:/--?|\+\+?|!=?=?|<=?|>=?|==?=?|&&?|\|\|?|\?|\*|\/|~|\^|%/,punctuation:/[{}[\];(),.:]/};
+Prism.languages.javascript=Prism.languages.extend("clike",{keyword:/\b(as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)\b/,number:/\b-?(0[xX][\dA-Fa-f]+|0[bB][01]+|0[oO][0-7]+|\d*\.?\d+([Ee][+-]?\d+)?|NaN|Infinity)\b/,"function":/[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*(?=\()/i,operator:/-[-=]?|\+[+=]?|!=?=?|<<?=?|>>?>?=?|=(?:==?|>)?|&[&=]?|\|[|=]?|\*\*?=?|\/=?|~|\^=?|%=?|\?|\.{3}/}),Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/(^|[^\/])\/(?!\/)(\[[^\]\r\n]+]|\\.|[^\/\\\[\r\n])+\/[gimyu]{0,5}(?=\s*($|[\r\n,.;})]))/,lookbehind:!0,greedy:!0}}),Prism.languages.insertBefore("javascript","string",{"template-string":{pattern:/`(?:\\\\|\\?[^\\])*?`/,greedy:!0,inside:{interpolation:{pattern:/\$\{[^}]+\}/,inside:{"interpolation-punctuation":{pattern:/^\$\{|\}$/,alias:"punctuation"},rest:Prism.languages.javascript}},string:/[\s\S]+/}}}),Prism.languages.markup&&Prism.languages.insertBefore("markup","tag",{script:{pattern:/(<script[\s\S]*?>)[\s\S]*?(?=<\/script>)/i,lookbehind:!0,inside:Prism.languages.javascript,alias:"language-javascript"}}),Prism.languages.js=Prism.languages.javascript;
+!function(e){var t={variable:[{pattern:/\$?\(\([\s\S]+?\)\)/,inside:{variable:[{pattern:/(^\$\(\([\s\S]+)\)\)/,lookbehind:!0},/^\$\(\(/],number:/\b-?(?:0x[\dA-Fa-f]+|\d*\.?\d+(?:[Ee]-?\d+)?)\b/,operator:/--?|-=|\+\+?|\+=|!=?|~|\*\*?|\*=|\/=?|%=?|<<=?|>>=?|<=?|>=?|==?|&&?|&=|\^=?|\|\|?|\|=|\?|:/,punctuation:/\(\(?|\)\)?|,|;/}},{pattern:/\$\([^)]+\)|`[^`]+`/,inside:{variable:/^\$\(|^`|\)$|`$/}},/\$(?:[a-z0-9_#\?\*!@]+|\{[^}]+\})/i]};e.languages.bash={shebang:{pattern:/^#!\s*\/bin\/bash|^#!\s*\/bin\/sh/,alias:"important"},comment:{pattern:/(^|[^"{\\])#.*/,lookbehind:!0},string:[{pattern:/((?:^|[^<])<<\s*)(?:"|')?(\w+?)(?:"|')?\s*\r?\n(?:[\s\S])*?\r?\n\2/g,lookbehind:!0,greedy:!0,inside:t},{pattern:/(["'])(?:\\\\|\\?[^\\])*?\1/g,greedy:!0,inside:t}],variable:t.variable,"function":{pattern:/(^|\s|;|\||&)(?:alias|apropos|apt-get|aptitude|aspell|awk|basename|bash|bc|bg|builtin|bzip2|cal|cat|cd|cfdisk|chgrp|chmod|chown|chroot|chkconfig|cksum|clear|cmp|comm|command|cp|cron|crontab|csplit|cut|date|dc|dd|ddrescue|df|diff|diff3|dig|dir|dircolors|dirname|dirs|dmesg|du|egrep|eject|enable|env|ethtool|eval|exec|expand|expect|export|expr|fdformat|fdisk|fg|fgrep|file|find|fmt|fold|format|free|fsck|ftp|fuser|gawk|getopts|git|grep|groupadd|groupdel|groupmod|groups|gzip|hash|head|help|hg|history|hostname|htop|iconv|id|ifconfig|ifdown|ifup|import|install|jobs|join|kill|killall|less|link|ln|locate|logname|logout|look|lpc|lpr|lprint|lprintd|lprintq|lprm|ls|lsof|make|man|mkdir|mkfifo|mkisofs|mknod|more|most|mount|mtools|mtr|mv|mmv|nano|netstat|nice|nl|nohup|notify-send|npm|nslookup|open|op|passwd|paste|pathchk|ping|pkill|popd|pr|printcap|printenv|printf|ps|pushd|pv|pwd|quota|quotacheck|quotactl|ram|rar|rcp|read|readarray|readonly|reboot|rename|renice|remsync|rev|rm|rmdir|rsync|screen|scp|sdiff|sed|seq|service|sftp|shift|shopt|shutdown|sleep|slocate|sort|source|split|ssh|stat|strace|su|sudo|sum|suspend|sync|tail|tar|tee|test|time|timeout|times|touch|top|traceroute|trap|tr|tsort|tty|type|ulimit|umask|umount|unalias|uname|unexpand|uniq|units|unrar|unshar|uptime|useradd|userdel|usermod|users|uuencode|uudecode|v|vdir|vi|vmstat|wait|watch|wc|wget|whereis|which|who|whoami|write|xargs|xdg-open|yes|zip)(?=$|\s|;|\||&)/,lookbehind:!0},keyword:{pattern:/(^|\s|;|\||&)(?:let|:|\.|if|then|else|elif|fi|for|break|continue|while|in|case|function|select|do|done|until|echo|exit|return|set|declare)(?=$|\s|;|\||&)/,lookbehind:!0},"boolean":{pattern:/(^|\s|;|\||&)(?:true|false)(?=$|\s|;|\||&)/,lookbehind:!0},operator:/&&?|\|\|?|==?|!=?|<<<?|>>|<=?|>=?|=~/,punctuation:/\$?\(\(?|\)\)?|\.\.|[{}[\];]/};var a=t.variable[1].inside;a["function"]=e.languages.bash["function"],a.keyword=e.languages.bash.keyword,a.boolean=e.languages.bash.boolean,a.operator=e.languages.bash.operator,a.punctuation=e.languages.bash.punctuation}(Prism);
+!function(e){var r=/%%?[~:\w]+%?|!\S+!/,t={pattern:/\/[a-z?]+(?=[ :]|$):?|-[a-z]\b|--[a-z-]+\b/im,alias:"attr-name",inside:{punctuation:/:/}},n=/"[^"]*"/,i=/(?:\b|-)\d+\b/;e.languages.batch={comment:[/^::.*/m,{pattern:/((?:^|[&(])[ \t]*)rem\b(?:[^^&)\r\n]|\^(?:\r\n|[\s\S]))*/im,lookbehind:!0}],label:{pattern:/^:.*/m,alias:"property"},command:[{pattern:/((?:^|[&(])[ \t]*)for(?: ?\/[a-z?](?:[ :](?:"[^"]*"|\S+))?)* \S+ in \([^)]+\) do/im,lookbehind:!0,inside:{keyword:/^for\b|\b(?:in|do)\b/i,string:n,parameter:t,variable:r,number:i,punctuation:/[()',]/}},{pattern:/((?:^|[&(])[ \t]*)if(?: ?\/[a-z?](?:[ :](?:"[^"]*"|\S+))?)* (?:not )?(?:cmdextversion \d+|defined \w+|errorlevel \d+|exist \S+|(?:"[^"]*"|\S+)?(?:==| (?:equ|neq|lss|leq|gtr|geq) )(?:"[^"]*"|\S+))/im,lookbehind:!0,inside:{keyword:/^if\b|\b(?:not|cmdextversion|defined|errorlevel|exist)\b/i,string:n,parameter:t,variable:r,number:i,operator:/\^|==|\b(?:equ|neq|lss|leq|gtr|geq)\b/i}},{pattern:/((?:^|[&()])[ \t]*)else\b/im,lookbehind:!0,inside:{keyword:/^else\b/i}},{pattern:/((?:^|[&(])[ \t]*)set(?: ?\/[a-z](?:[ :](?:"[^"]*"|\S+))?)* (?:[^^&)\r\n]|\^(?:\r\n|[\s\S]))*/im,lookbehind:!0,inside:{keyword:/^set\b/i,string:n,parameter:t,variable:[r,/\w+(?=(?:[*\/%+\-&^|]|<<|>>)?=)/],number:i,operator:/[*\/%+\-&^|]=?|<<=?|>>=?|[!~_=]/,punctuation:/[()',]/}},{pattern:/((?:^|[&(])[ \t]*@?)\w+\b(?:[^^&)\r\n]|\^(?:\r\n|[\s\S]))*/im,lookbehind:!0,inside:{keyword:/^\w+\b/i,string:n,parameter:t,label:{pattern:/(^\s*):\S+/m,lookbehind:!0,alias:"property"},variable:r,number:i,operator:/\^/}}],operator:/[&@]/,punctuation:/[()']/}}(Prism);
+Prism.languages.c=Prism.languages.extend("clike",{keyword:/\b(asm|typeof|inline|auto|break|case|char|const|continue|default|do|double|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)\b/,operator:/\-[>-]?|\+\+?|!=?|<<?=?|>>?=?|==?|&&?|\|?\||[~^%?*\/]/,number:/\b-?(?:0x[\da-f]+|\d*\.?\d+(?:e[+-]?\d+)?)[ful]*\b/i}),Prism.languages.insertBefore("c","string",{macro:{pattern:/(^\s*)#\s*[a-z]+([^\r\n\\]|\\.|\\(?:\r\n?|\n))*/im,lookbehind:!0,alias:"property",inside:{string:{pattern:/(#\s*include\s*)(<.+?>|("|')(\\?.)+?\3)/,lookbehind:!0},directive:{pattern:/(#\s*)\b(define|elif|else|endif|error|ifdef|ifndef|if|import|include|line|pragma|undef|using)\b/,lookbehind:!0,alias:"keyword"}}},constant:/\b(__FILE__|__LINE__|__DATE__|__TIME__|__TIMESTAMP__|__func__|EOF|NULL|stdin|stdout|stderr)\b/}),delete Prism.languages.c["class-name"],delete Prism.languages.c["boolean"];
+Prism.languages.csharp=Prism.languages.extend("clike",{keyword:/\b(abstract|as|async|await|base|bool|break|byte|case|catch|char|checked|class|const|continue|decimal|default|delegate|do|double|else|enum|event|explicit|extern|false|finally|fixed|float|for|foreach|goto|if|implicit|in|int|interface|internal|is|lock|long|namespace|new|null|object|operator|out|override|params|private|protected|public|readonly|ref|return|sbyte|sealed|short|sizeof|stackalloc|static|string|struct|switch|this|throw|true|try|typeof|uint|ulong|unchecked|unsafe|ushort|using|virtual|void|volatile|while|add|alias|ascending|async|await|descending|dynamic|from|get|global|group|into|join|let|orderby|partial|remove|select|set|value|var|where|yield)\b/,string:[{pattern:/@("|')(\1\1|\\\1|\\?(?!\1)[\s\S])*\1/,greedy:!0},{pattern:/("|')(\\?.)*?\1/,greedy:!0}],number:/\b-?(0x[\da-f]+|\d*\.?\d+f?)\b/i}),Prism.languages.insertBefore("csharp","keyword",{"generic-method":{pattern:/[a-z0-9_]+\s*<[^>\r\n]+?>\s*(?=\()/i,alias:"function",inside:{keyword:Prism.languages.csharp.keyword,punctuation:/[<>(),.:]/}},preprocessor:{pattern:/(^\s*)#.*/m,lookbehind:!0,alias:"property",inside:{directive:{pattern:/(\s*#)\b(define|elif|else|endif|endregion|error|if|line|pragma|region|undef|warning)\b/,lookbehind:!0,alias:"keyword"}}}});
+Prism.languages.cpp=Prism.languages.extend("c",{keyword:/\b(alignas|alignof|asm|auto|bool|break|case|catch|char|char16_t|char32_t|class|compl|const|constexpr|const_cast|continue|decltype|default|delete|do|double|dynamic_cast|else|enum|explicit|export|extern|float|for|friend|goto|if|inline|int|long|mutable|namespace|new|noexcept|nullptr|operator|private|protected|public|register|reinterpret_cast|return|short|signed|sizeof|static|static_assert|static_cast|struct|switch|template|this|thread_local|throw|try|typedef|typeid|typename|union|unsigned|using|virtual|void|volatile|wchar_t|while)\b/,"boolean":/\b(true|false)\b/,operator:/[-+]{1,2}|!=?|<{1,2}=?|>{1,2}=?|\->|:{1,2}|={1,2}|\^|~|%|&{1,2}|\|?\||\?|\*|\/|\b(and|and_eq|bitand|bitor|not|not_eq|or|or_eq|xor|xor_eq)\b/}),Prism.languages.insertBefore("cpp","keyword",{"class-name":{pattern:/(class\s+)[a-z0-9_]+/i,lookbehind:!0}});
+Prism.languages.docker={keyword:{pattern:/(^\s*)(?:ONBUILD|FROM|MAINTAINER|RUN|EXPOSE|ENV|ADD|COPY|VOLUME|USER|WORKDIR|CMD|LABEL|ENTRYPOINT)(?=\s)/mi,lookbehind:true},string:/("|')(?:(?!\1)[^\\\r\n]|\\(?:\r\n|[\s\S]))*?\1/,comment:/#.*/,punctuation:/---|\.\.\.|[:[\]{}\-,|>?]/};Prism.languages.dockerfile=Prism.languages.docker;
+Prism.languages.git={comment:/^#.*/m,deleted:/^[-–].*/m,inserted:/^\+.*/m,string:/("|')(\\?.)*?\1/m,command:{pattern:/^.*\$ git .*$/m,inside:{parameter:/\s(--|-)\w+/m}},coord:/^@@.*@@$/m,commit_sha1:/^commit \w{40}$/m};
+Prism.languages.go=Prism.languages.extend("clike",{keyword:/\b(break|case|chan|const|continue|default|defer|else|fallthrough|for|func|go(to)?|if|import|interface|map|package|range|return|select|struct|switch|type|var)\b/,builtin:/\b(bool|byte|complex(64|128)|error|float(32|64)|rune|string|u?int(8|16|32|64|)|uintptr|append|cap|close|complex|copy|delete|imag|len|make|new|panic|print(ln)?|real|recover)\b/,"boolean":/\b(_|iota|nil|true|false)\b/,operator:/[*\/%^!=]=?|\+[=+]?|-[=-]?|\|[=|]?|&(?:=|&|\^=?)?|>(?:>=?|=)?|<(?:<=?|=|-)?|:=|\.\.\./,number:/\b(-?(0x[a-f\d]+|(\d+\.?\d*|\.\d+)(e[-+]?\d+)?)i?)\b/i,string:{pattern:/("|'|`)(\\?.|\r|\n)*?\1/,greedy:!0}}),delete Prism.languages.go["class-name"];
+Prism.languages.java=Prism.languages.extend("clike",{keyword:/\b(abstract|continue|for|new|switch|assert|default|goto|package|synchronized|boolean|do|if|private|this|break|double|implements|protected|throw|byte|else|import|public|throws|case|enum|instanceof|return|transient|catch|extends|int|short|try|char|final|interface|static|void|class|finally|long|strictfp|volatile|const|float|native|super|while)\b/,number:/\b0b[01]+\b|\b0x[\da-f]*\.?[\da-fp\-]+\b|\b\d*\.?\d+(?:e[+-]?\d+)?[df]?\b/i,operator:{pattern:/(^|[^.])(?:\+[+=]?|-[-=]?|!=?|<<?=?|>>?>?=?|==?|&[&=]?|\|[|=]?|\*=?|\/=?|%=?|\^=?|[?:~])/m,lookbehind:!0}}),Prism.languages.insertBefore("java","function",{annotation:{alias:"punctuation",pattern:/(^|[^.])@\w+/,lookbehind:!0}});
+Prism.languages.json={property:/"(?:\\.|[^\\"])*"(?=\s*:)/gi,string:/"(?!:)(?:\\.|[^\\"])*"(?!:)/g,number:/\b-?(0x[\dA-Fa-f]+|\d*\.?\d+([Ee][+-]?\d+)?)\b/g,punctuation:/[{}[\]);,]/g,operator:/:/g,"boolean":/\b(true|false)\b/gi,"null":/\bnull\b/gi},Prism.languages.jsonp=Prism.languages.json;
+Prism.languages.markdown=Prism.languages.extend("markup",{}),Prism.languages.insertBefore("markdown","prolog",{blockquote:{pattern:/^>(?:[\t ]*>)*/m,alias:"punctuation"},code:[{pattern:/^(?: {4}|\t).+/m,alias:"keyword"},{pattern:/``.+?``|`[^`\n]+`/,alias:"keyword"}],title:[{pattern:/\w+.*(?:\r?\n|\r)(?:==+|--+)/,alias:"important",inside:{punctuation:/==+$|--+$/}},{pattern:/(^\s*)#+.+/m,lookbehind:!0,alias:"important",inside:{punctuation:/^#+|#+$/}}],hr:{pattern:/(^\s*)([*-])([\t ]*\2){2,}(?=\s*$)/m,lookbehind:!0,alias:"punctuation"},list:{pattern:/(^\s*)(?:[*+-]|\d+\.)(?=[\t ].)/m,lookbehind:!0,alias:"punctuation"},"url-reference":{pattern:/!?\[[^\]]+\]:[\t ]+(?:\S+|<(?:\\.|[^>\\])+>)(?:[\t ]+(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|\((?:\\.|[^)\\])*\)))?/,inside:{variable:{pattern:/^(!?\[)[^\]]+/,lookbehind:!0},string:/(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|\((?:\\.|[^)\\])*\))$/,punctuation:/^[\[\]!:]|[<>]/},alias:"url"},bold:{pattern:/(^|[^\\])(\*\*|__)(?:(?:\r?\n|\r)(?!\r?\n|\r)|.)+?\2/,lookbehind:!0,inside:{punctuation:/^\*\*|^__|\*\*$|__$/}},italic:{pattern:/(^|[^\\])([*_])(?:(?:\r?\n|\r)(?!\r?\n|\r)|.)+?\2/,lookbehind:!0,inside:{punctuation:/^[*_]|[*_]$/}},url:{pattern:/!?\[[^\]]+\](?:\([^\s)]+(?:[\t ]+"(?:\\.|[^"\\])*")?\)| ?\[[^\]\n]*\])/,inside:{variable:{pattern:/(!?\[)[^\]]+(?=\]$)/,lookbehind:!0},string:{pattern:/"(?:\\.|[^"\\])*"(?=\)$)/}}}}),Prism.languages.markdown.bold.inside.url=Prism.util.clone(Prism.languages.markdown.url),Prism.languages.markdown.italic.inside.url=Prism.util.clone(Prism.languages.markdown.url),Prism.languages.markdown.bold.inside.italic=Prism.util.clone(Prism.languages.markdown.italic),Prism.languages.markdown.italic.inside.bold=Prism.util.clone(Prism.languages.markdown.bold);
+Prism.languages.protobuf=Prism.languages.extend("clike",{keyword:/\b(package|import|message|enum)\b/,builtin:/\b(required|repeated|optional|reserved)\b/,primitive:{pattern:/\b(double|float|int32|int64|uint32|uint64|sint32|sint64|fixed32|fixed64|sfixed32|sfixed64|bool|string|bytes)\b/,alias:"symbol"}});
+Prism.languages.yaml={scalar:{pattern:/([\-:]\s*(![^\s]+)?[ \t]*[|>])[ \t]*(?:((?:\r?\n|\r)[ \t]+)[^\r\n]+(?:\3[^\r\n]+)*)/,lookbehind:!0,alias:"string"},comment:/#.*/,key:{pattern:/(\s*(?:^|[:\-,[{\r\n?])[ \t]*(![^\s]+)?[ \t]*)[^\r\n{[\]},#\s]+?(?=\s*:\s)/,lookbehind:!0,alias:"atrule"},directive:{pattern:/(^[ \t]*)%.+/m,lookbehind:!0,alias:"important"},datetime:{pattern:/([:\-,[{]\s*(![^\s]+)?[ \t]*)(\d{4}-\d\d?-\d\d?([tT]|[ \t]+)\d\d?:\d{2}:\d{2}(\.\d*)?[ \t]*(Z|[-+]\d\d?(:\d{2})?)?|\d{4}-\d{2}-\d{2}|\d\d?:\d{2}(:\d{2}(\.\d*)?)?)(?=[ \t]*($|,|]|}))/m,lookbehind:!0,alias:"number"},"boolean":{pattern:/([:\-,[{]\s*(![^\s]+)?[ \t]*)(true|false)[ \t]*(?=$|,|]|})/im,lookbehind:!0,alias:"important"},"null":{pattern:/([:\-,[{]\s*(![^\s]+)?[ \t]*)(null|~)[ \t]*(?=$|,|]|})/im,lookbehind:!0,alias:"important"},string:{pattern:/([:\-,[{]\s*(![^\s]+)?[ \t]*)("(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*')(?=[ \t]*($|,|]|}))/m,lookbehind:!0,greedy:!0},number:{pattern:/([:\-,[{]\s*(![^\s]+)?[ \t]*)[+\-]?(0x[\da-f]+|0o[0-7]+|(\d+\.?\d*|\.?\d+)(e[\+\-]?\d+)?|\.inf|\.nan)[ \t]*(?=$|,|]|})/im,lookbehind:!0},tag:/![^\s]+/,important:/[&*][\w]+/,punctuation:/---|[:[\]{}\-,|>?]|\.\.\./};
+!function(){function e(e,t){return Array.prototype.slice.call((t||document).querySelectorAll(e))}function t(e,t){return t=" "+t+" ",(" "+e.className+" ").replace(/[\n\t]/g," ").indexOf(t)>-1}function n(e,n,i){for(var o,a=n.replace(/\s+/g,"").split(","),d=+e.getAttribute("data-line-offset")||0,l=r()?parseInt:parseFloat,c=l(getComputedStyle(e).lineHeight),s=0;o=a[s++];){o=o.split("-");var u=+o[0],m=+o[1]||u,h=document.createElement("div");h.textContent=Array(m-u+2).join(" \n"),h.setAttribute("aria-hidden","true"),h.className=(i||"")+" line-highlight",t(e,"line-numbers")||(h.setAttribute("data-start",u),m>u&&h.setAttribute("data-end",m)),h.style.top=(u-d-1)*c+"px",t(e,"line-numbers")?e.appendChild(h):(e.querySelector("code")||e).appendChild(h)}}function i(){var t=location.hash.slice(1);e(".temporary.line-highlight").forEach(function(e){e.parentNode.removeChild(e)});var i=(t.match(/\.([\d,-]+)$/)||[,""])[1];if(i&&!document.getElementById(t)){var r=t.slice(0,t.lastIndexOf(".")),o=document.getElementById(r);o&&(o.hasAttribute("data-line")||o.setAttribute("data-line",""),n(o,i,"temporary "),document.querySelector(".temporary.line-highlight").scrollIntoView())}}if("undefined"!=typeof self&&self.Prism&&self.document&&document.querySelector){var r=function(){var e;return function(){if("undefined"==typeof e){var t=document.createElement("div");t.style.fontSize="13px",t.style.lineHeight="1.5",t.style.padding=0,t.style.border=0,t.innerHTML="&nbsp;<br />&nbsp;",document.body.appendChild(t),e=38===t.offsetHeight,document.body.removeChild(t)}return e}}(),o=0;Prism.hooks.add("before-sanity-check",function(t){var n=t.element.parentNode,i=n&&n.getAttribute("data-line");if(n&&i&&/pre/i.test(n.nodeName)){var r=0;e(".line-highlight",n).forEach(function(e){r+=e.textContent.length,e.parentNode.removeChild(e)}),r&&/^( \n)+$/.test(t.code.slice(-r))&&(t.code=t.code.slice(0,-r))}}),Prism.hooks.add("complete",function(e){var t=e.element.parentNode,r=t&&t.getAttribute("data-line");t&&r&&/pre/i.test(t.nodeName)&&(clearTimeout(o),n(t,r),o=setTimeout(i,1))}),window.addEventListener&&window.addEventListener("hashchange",i)}}();
+!function(){"undefined"!=typeof self&&self.Prism&&self.document&&Prism.hooks.add("complete",function(e){if(e.code){var t=e.element.parentNode,s=/\s*\bline-numbers\b\s*/;if(t&&/pre/i.test(t.nodeName)&&(s.test(t.className)||s.test(e.element.className))&&!e.element.querySelector(".line-numbers-rows")){s.test(e.element.className)&&(e.element.className=e.element.className.replace(s,"")),s.test(t.className)||(t.className+=" line-numbers");var n,a=e.code.match(/\n(?!$)/g),l=a?a.length+1:1,r=new Array(l+1);r=r.join("<span></span>"),n=document.createElement("span"),n.setAttribute("aria-hidden","true"),n.className="line-numbers-rows",n.innerHTML=r,t.hasAttribute("data-start")&&(t.style.counterReset="linenumber "+(parseInt(t.getAttribute("data-start"),10)-1)),e.element.appendChild(n)}}})}();
+!function(){"undefined"!=typeof self&&self.Prism&&self.document&&document.querySelector&&(self.Prism.fileHighlight=function(){var e={js:"javascript",py:"python",rb:"ruby",ps1:"powershell",psm1:"powershell",sh:"bash",bat:"batch",h:"c",tex:"latex"};Array.prototype.forEach&&Array.prototype.slice.call(document.querySelectorAll("pre[data-src]")).forEach(function(t){for(var a,s=t.getAttribute("data-src"),n=t,r=/\blang(?:uage)?-(?!\*)(\w+)\b/i;n&&!r.test(n.className);)n=n.parentNode;if(n&&(a=(t.className.match(r)||[,""])[1]),!a){var o=(s.match(/\.(\w+)$/)||[,""])[1];a=e[o]||o}var l=document.createElement("code");l.className="language-"+a,t.textContent="",l.textContent="Loading…",t.appendChild(l);var i=new XMLHttpRequest;i.open("GET",s,!0),i.onreadystatechange=function(){4==i.readyState&&(i.status<400&&i.responseText?(l.textContent=i.responseText,Prism.highlightElement(l)):l.textContent=i.status>=400?"✖ Error "+i.status+" while fetching file: "+i.statusText:"✖ Error: File does not exist or is empty")},i.send(null)})},document.addEventListener("DOMContentLoaded",self.Prism.fileHighlight))}();
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document){var t=[],e={},n=function(){};Prism.plugins.toolbar={};var a=Prism.plugins.toolbar.registerButton=function(n,a){var o;o="function"==typeof a?a:function(t){var e;return"function"==typeof a.onClick?(e=document.createElement("button"),e.type="button",e.addEventListener("click",function(){a.onClick.call(this,t)})):"string"==typeof a.url?(e=document.createElement("a"),e.href=a.url):e=document.createElement("span"),e.textContent=a.text,e},t.push(e[n]=o)},o=Prism.plugins.toolbar.hook=function(a){var o=a.element.parentNode;if(o&&/pre/i.test(o.nodeName)&&!o.classList.contains("code-toolbar")){o.classList.add("code-toolbar");var r=document.createElement("div");r.classList.add("toolbar"),document.body.hasAttribute("data-toolbar-order")&&(t=document.body.getAttribute("data-toolbar-order").split(",").map(function(t){return e[t]||n})),t.forEach(function(t){var e=t(a);if(e){var n=document.createElement("div");n.classList.add("toolbar-item"),n.appendChild(e),r.appendChild(n)}}),o.appendChild(r)}};a("label",function(t){var e=t.element.parentNode;if(e&&/pre/i.test(e.nodeName)&&e.hasAttribute("data-label")){var n,a,o=e.getAttribute("data-label");try{a=document.querySelector("template#"+o)}catch(r){}return a?n=a.content:(e.hasAttribute("data-url")?(n=document.createElement("a"),n.href=e.getAttribute("data-url")):n=document.createElement("span"),n.textContent=o),n}}),Prism.hooks.add("complete",o)}}();
+!function(){"undefined"!=typeof self&&!self.Prism||"undefined"!=typeof global&&!global.Prism||Prism.hooks.add("wrap",function(e){"keyword"===e.type&&e.classes.push("keyword-"+e.content)})}();
+!function(){if("undefined"!=typeof self&&self.Prism&&self.document){if(!Prism.plugins.toolbar)return console.warn("Copy to Clipboard plugin loaded before Toolbar plugin."),void 0;var o=window.Clipboard||void 0;o||"function"!=typeof require||(o=require("clipboard"));var e=[];if(!o){var t=document.createElement("script"),n=document.querySelector("head");t.onload=function(){if(o=window.Clipboard)for(;e.length;)e.pop()()},t.src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.5.8/clipboard.min.js",n.appendChild(t)}Prism.plugins.toolbar.registerButton("copy-to-clipboard",function(t){function n(){var e=new o(i,{text:function(){return t.code}});e.on("success",function(){i.textContent="Copied!",r()}),e.on("error",function(){i.textContent="Press Ctrl+C to copy",r()})}function r(){setTimeout(function(){i.textContent="Copy"},5e3)}var i=document.createElement("a");return i.textContent="Copy",o?n():e.push(n),i})}}();

content/banner.js

diff --git a/content/banner.js b/content/banner.js
new file mode 100644
index 0000000..9c0c865
--- /dev/null
+++ b/content/banner.js
@@ -0,0 +1,21 @@
+const fs = require('fs');
+const pkg = require('./package.json');
+const filename = 'assets/js/main.min.js';
+const script = fs.readFileSync(filename);
+const padStart = str => ('0' + str).slice(-2)
+const dateObj = new Date;
+const date = `${dateObj.getFullYear()}-${padStart(dateObj.getMonth() + 1)}-${padStart(dateObj.getDate())}`;
+const banner = `---
+layout:
+---
+
+/*!
+ * Minimal Mistakes Jekyll Theme ${pkg.version} by ${pkg.author}
+ * Copyright ${dateObj.getFullYear()} Michael Rose - mademistakes.com | @mmistakes
+ * Licensed under ${pkg.license}
+ */
+`;
+
+if (script.slice(0, 3) != '/**') {
+  fs.writeFileSync(filename, banner + script);
+}
\ No newline at end of file

content/cn/404.html

diff --git a/content/cn/404.html b/content/cn/404.html
new file mode 100644
index 0000000..aa7d97d
--- /dev/null
+++ b/content/cn/404.html
@@ -0,0 +1,445 @@
+<!doctype html>
+<!--
+  Minimal Mistakes Jekyll Theme 4.4.1 by Michael Rose
+  Copyright 2017 Michael Rose - mademistakes.com | @mmistakes
+  Free for personal and commercial use under the MIT license
+  https://github.com/mmistakes/minimal-mistakes/blob/master/LICENSE.txt
+-->
+<html lang="cn" class="no-js">
+  <head>
+    <meta charset="utf-8">
+
+<!-- begin SEO -->
+
+
+
+
+
+
+
+
+
+<title>页面不存在 - Apache ServiceComb</title>
+
+
+
+
+<meta name="description" content="页面不存在.">
+
+
+
+
+<meta name="author" content="">
+
+<meta property="og:locale" content="cn">
+<meta property="og:site_name" content="Apache ServiceComb">
+<meta property="og:title" content="页面不存在">
+
+
+  <link rel="canonical" href="https://github.com/pages/apache/incubator-servicecomb-website/cn/404.html">
+  <meta property="og:url" content="https://github.com/pages/apache/incubator-servicecomb-website/cn/404.html">
+
+
+
+  <meta property="og:description" content="页面不存在.">
+
+
+
+  <meta name="twitter:site" content="@ServiceComb">
+  <meta name="twitter:title" content="页面不存在">
+  <meta name="twitter:description" content="页面不存在.">
+  <meta name="twitter:url" content="">
+
+  
+    <meta name="twitter:card" content="summary">
+    
+  
+
+  
+
+
+
+  
+
+  
+
+
+
+
+
+
+
+
+
+
+
+
+  <script type="application/ld+json">
+    {
+      "@context" : "http://schema.org",
+      "@type" : "Person",
+      "name" : "Apache ServiceComb",
+      "url" : "https://github.com/pages/apache/incubator-servicecomb-website",
+      "sameAs" : null
+    }
+  </script>
+
+
+
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content/cn/developers/becomming-a-commiter.html

diff --git a/content/cn/developers/becomming-a-commiter.html b/content/cn/developers/becomming-a-commiter.html
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+
+<p>ServiceComb采用了与Apache基金会相同的精英治理模式。 一旦您对项目表现出足够的持续承诺并赢得了信任，PMC可能会邀请您成为提交者。</p>
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+
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+
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+
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#为apache-servicecomb做贡献" id="markdown-toc-为apache-servicecomb做贡献">为Apache ServiceComb做贡献</a></li>
+  <li><a href="#初次接触" id="markdown-toc-初次接触">初次接触</a></li>
+  <li><a href="#改进文档" id="markdown-toc-改进文档">改进文档</a></li>
+  <li><a href="#如果发现了一个bug或问题" id="markdown-toc-如果发现了一个bug或问题">如果发现了一个Bug或问题</a></li>
+  <li><a href="#编写代码" id="markdown-toc-编写代码">编写代码</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="为apache-servicecomb做贡献">为Apache ServiceComb做贡献</h2>
+<p>您可以通过很多方式帮助ServiceComb成长为更优秀的微服务框架——非常欢迎伸出援手！</p>
+
+<ul>
+  <li>浏览文档，这样可以加深您对ServiceComb的了解，学习到知识，一旦发现文档写得不清晰或逻辑混乱的地方，请通知我们；</li>
+  <li>下载代码，试一试我们介绍的功能，看看它是否与您预想的一样工作；</li>
+  <li>分析源代码，如果希望了解更多技术细节，请在<a href="http://servicecomb.apache.org/cn/developers/use-gitter/">Gitter</a>上提问，大家会尽快解答；</li>
+  <li>希望炫一把黑科技体现您的实力？看看我们的 <a href="https://issues.apache.org/jira/browse/SCB">issue tracker</a> 吧，欢迎您承接Open状态的Issues和未完成的特性，提交<a href="http://servicecomb.apache.org/cn/developers/submit-codes/">PR</a>，成为贡献者之一；</li>
+  <li>如果您接触 ServiceComb不久并且很希望帮助我们，您可以先从<a href="https://issues.apache.org/jira/browse/SCB-333?jql=project%20%3D%20SCB%20AND%20status%20%3D%20Open%20AND%20fixVersion%20in%20(EMPTY%2C%20java-chassis-1.0.0-m2)%20AND%20labels%20%3D%20newbie">简单的任务</a>入手，循序渐进，甚至成长为Committer；</li>
+  <li>如果在使用ServiceComb的过程中发现有功能无法满足您的需求或出现问题，请在Issues中记录，并Watch项目，这样一旦这个问题有进展，都会第一时间通知到您。</li>
+</ul>
+
+<h2 id="初次接触">初次接触</h2>
+<p>有下面的方式加入ServcieComb社区：</p>
+
+<ul>
+  <li>订阅我们的<a href="http://servicecomb.apache.org/cn/developers/subscribe-mail-list">邮件列表</a>，并为您关注的话题发表意见；</li>
+  <li>来<a href="https://gitter.im/ServiceCombUsers/Lobby">Gitter</a>和大家打个招呼吧！</li>
+</ul>
+
+<h2 id="改进文档">改进文档</h2>
+<p>文档是用户了解Apache ServiceComb最主要的方式，也是我们最需要帮助的地方！</p>
+
+<p>因此如果您对改进文档的质量感兴趣，不论是修订一个页面的地址、更正一个链接、以及写一篇更优秀的入门文档，我们都非常欢迎！</p>
+
+<p>我们的文档大多数是使用markdown格式编写的，您需要同步我们的<a href="https://github.com/apache/servicecomb-website">Website</a>项目，直接在 github上编辑后提交PR即可。</p>
+
+<h2 id="如果发现了一个bug或问题">如果发现了一个Bug或问题</h2>
+
+<p>请提交一个新的Issue在我们的<a href="https://issues.apache.org/jira/browse/SCB">issue tracker</a>上，如果您能够提供一个JUnit测试用例来复现这个问题，那么我们就能够更快的解决它，例如已经有的<a href="https://github.com/apache/servicecomb-pack/tree/master/alpha/alpha-core/src/test/java/org/apache/servicecomb/pack/alpha/core">例子</a>，并且我们还能够持续的确认这个问题不会再次出现在未来的版本中。</p>
+
+<h2 id="编写代码">编写代码</h2>
+
+<p>ServiceComb的所有项目都在 <a href="https://github.com/search?q=org%3Aapache+servicecomb">Github</a>上，包含下面几个子项目：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>项目名</th>
+      <th>项目简介</th>
+      <th>编程语言</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-java-chassis">servicecomb-java-chassis</a></td>
+      <td>Java微服务框架（SDK）</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-service-center">servicecomb-service-center</a></td>
+      <td>服务中心（服务注册及发现）</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-pack">servicecomb-pack</a></td>
+      <td>支持Saga/TCC等多协议的分布式事务方案</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-Mesher">servicecomb-mesher</a></td>
+      <td>微服务网格</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-kie">servicecomb-kie</a></td>
+      <td>微服务配置管理中心</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-toolkit">servicecomb-toolkit</a></td>
+      <td>基于契约的微服务开发工具</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-samples">servicecomb-samples</a></td>
+      <td>提供了微服务示例</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-fence">servicecomb-fence</a></td>
+      <td>ServiceComb Java-chassis安全认证解决方案</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-docs">servicecomb-docs</a></td>
+      <td>ServiceComb用户手册</td>
+      <td>CSS</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-website">servicecomb-website</a></td>
+      <td>ServiceComb网站</td>
+      <td>HTML</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-saga-actuator">servicecomb-saga-actuator</a></td>
+      <td>集中式Saga事务协调器 （归档）</td>
+      <td>Java</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>如果希望给ServiceComb提交代码，您需要从github上fork对应的项目至您的项目空间下，为您提交的代码创建一个新的分支，添加源项目为upstream，并提交PR，更详细的步骤可以参考<a href="http://servicecomb.apache.org/cn/developers/submit-codes/">这篇文档</a>。</p>
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diff --git a/content/cn/developers/index.html b/content/cn/developers/index.html
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+          <a href="/cn/developers/submit-issues/"><span class="nav__sub-title nav__sub-title-with-url">发现问题</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/submit-codes/"><span class="nav__sub-title nav__sub-title-with-url">代码提交指南</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/subscribe-mail-list/"><span class="nav__sub-title nav__sub-title-with-url">邮件列表订阅指南</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/use-jira/"><span class="nav__sub-title nav__sub-title-with-url">JIRA使用方法</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/use-gitter/"><span class="nav__sub-title nav__sub-title-with-url">Gitter 使用方法</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">设置代码仓库写权限</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/release-guide/"><span class="nav__sub-title nav__sub-title-with-url">Servicecomb发版指南</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/release-validation-guide/"><span class="nav__sub-title nav__sub-title-with-url">ServiceComb发版验证指南</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/sonarcloud-how-to/"><span class="nav__sub-title nav__sub-title-with-url">SonarCloud集成指南</span></a>
+        
+
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="项目列表">
+    <meta itemprop="description" content="项目列表">
+    
+    <meta itemprop="dateModified" content="June 24, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">项目列表
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+
+  </nav>
+</aside>
+
+<p><strong>ServiceComb</strong> 项目托管在<a href="https://github.com/apache?q=servicecomb">Github</a>上，其各子项目如下表所示：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>项目名</th>
+      <th>项目简介</th>
+      <th>编程语言</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-java-chassis">servicecomb-java-chassis</a></td>
+      <td>Java微服务框架（SDK）</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-service-center">servicecomb-service-center</a></td>
+      <td>服务中心（服务注册及发现）</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-pack">servicecomb-pack</a></td>
+      <td>支持Saga/TCC等多协议的分布式事务方案</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-Mesher">servicecomb-mesher</a></td>
+      <td>微服务网格</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-kie">servicecomb-kie</a></td>
+      <td>微服务配置管理中心</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-toolkit">servicecomb-toolkit</a></td>
+      <td>基于契约的微服务开发工具</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-samples">servicecomb-samples</a></td>
+      <td>提供了微服务示例</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-fence">servicecomb-fence</a></td>
+      <td>ServiceComb Java-chassis安全认证解决方案</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-docs">servicecomb-docs</a></td>
+      <td>ServiceComb用户手册</td>
+      <td>CSS</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-website">servicecomb-website</a></td>
+      <td>ServiceComb网站</td>
+      <td>HTML</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-saga-actuator">servicecomb-saga-actuator</a></td>
+      <td>集中式Saga事务协调器 （归档）</td>
+      <td>Java</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>参与 ServiceComb 项目并为其作出贡献的方法有很多：代码实现、测试编写、流程工具改进、文档完善等。您可以选择上述任何一个或多个感兴趣的项目进行贡献。具体贡献事宜可参考以下指南：</p>
+
+<ul>
+  <li><a href="/cn/developers/setup-develop-environment/">开发环境准备</a>：主要介绍git，JDK，Maven以及IDE的安装及配置。</li>
+  <li><a href="/cn/developers/submit-codes/">代码提交指南</a>：主要介绍功能特性需求及现有bug的获取途径，提交代码前的测试事宜，如何提交PR以及如何解决冲突等。</li>
+</ul>
+
+<p>同时，也欢迎您订阅<a href="mailto:dev-subscribe@servicecomb.apache.org">ServiceComb邮件列表</a>了解 ServiceComb 项目的开发动态以及进行话题讨论。订阅的方法可参阅<a href="/cn/developers/subscribe-mail-list/">邮件列表订阅指南</a>。</p>
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+        <li><a href="http://issues.apache.org/jira/browse/SCB">报告本网页问题</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/cn/developer-guide.md">在Github上编辑此页</a></li>
+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
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+    <div class="col">
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content/cn/developers/release-guide/index.html

diff --git a/content/cn/developers/release-guide/index.html b/content/cn/developers/release-guide/index.html
new file mode 100644
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--- /dev/null
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@@ -0,0 +1,966 @@
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+  <script type="application/ld+json">
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+    }
+  </script>
+
+
+
+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
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+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
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+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/use-jira/"><span class="nav__sub-title nav__sub-title-with-url">JIRA使用方法</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/use-gitter/"><span class="nav__sub-title nav__sub-title-with-url">Gitter 使用方法</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">设置代码仓库写权限</span></a>
+        
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+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/release-guide/"><span class="nav__sub-title nav__sub-title-with-url">Servicecomb发版指南</span></a>
+        
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+    
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+        
+          
+          
+
+          <a href="/cn/developers/release-validation-guide/"><span class="nav__sub-title nav__sub-title-with-url">ServiceComb发版验证指南</span></a>
+        
+
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+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/sonarcloud-how-to/"><span class="nav__sub-title nav__sub-title-with-url">SonarCloud集成指南</span></a>
+        
+
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb发版指南">
+    <meta itemprop="description" content="ServiceComb发版指南 介绍如何在Apache发版">
+    
+    <meta itemprop="dateModified" content="May 08, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb发版指南
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#前期准备" id="markdown-toc-前期准备">前期准备</a></li>
+  <li><a href="#配置maven" id="markdown-toc-配置maven">配置Maven</a></li>
+  <li><a href="#发行service-center" id="markdown-toc-发行service-center">发行Service-Center</a></li>
+  <li><a href="#发行java-chassis" id="markdown-toc-发行java-chassis">发行Java-Chassis</a></li>
+  <li><a href="#发行pack" id="markdown-toc-发行pack">发行Pack</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>本文向大家介绍如何在Apache上进行ServiceComb项目发版.</p>
+
+<h2 id="前期准备">前期准备</h2>
+
+<ol>
+  <li>项目CI应该是正常的（绿色的）。</li>
+  <li>确定发布版本号。</li>
+  <li>因为发版的过程中需要使用<a href="https://www.apache.org/dev/openpgp.html#generate-key">密钥</a>对<a href="https://www.apache.org/dev/release-signing">发布版本进行签名</a>，请确保密钥中的公钥已经<a href="https://www.apache.org/dev/openpgp.html#publish-in-web-space">发布</a>到公钥服务器。</li>
+  <li>熟悉maven版本发行相关的设置。</li>
+</ol>
+
+<h2 id="配置maven">配置Maven</h2>
+<p>ServiceComb Java-Chassis和Saga使用Maven进行版本发布，我们需要在发布前对Maven进行一些配置。</p>
+
+<p>在使用Maven把发行包发布到仓库之前，参考了Maven项目的设定<a href="http://maven.apache.org/developers/committer-settings.html">指南</a>。请特别注意<a href="http://maven.apache.org/guides/mini/guide-encryption.html">加密密码</a>。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>&lt;settings&gt;
+  ...
+  &lt;servers&gt;
+    &lt;!-- Per http://maven.apache.org/developers/committer-settings.html --&gt;
+
+    &lt;!-- To stage a release of some part of Maven --&gt;
+    &lt;server&gt;
+      &lt;id&gt;apache.releases.https&lt;/id&gt;
+      &lt;username&gt; &lt;!-- YOUR APACHE LDAP USERNAME --&gt; &lt;/username&gt;
+      &lt;password&gt; &lt;!-- YOUR APACHE LDAP PASSWORD --&gt; &lt;/password&gt;
+    &lt;/server&gt;
+  &lt;/servers&gt;
+  ...
+  &lt;profiles&gt;
+    &lt;profile&gt;
+      &lt;id&gt;apache-release&lt;/id&gt;
+      &lt;properties&gt;
+        &lt;gpg.useagent&gt;false&lt;/gpg.useagent&gt;
+        &lt;gpg.passphrase&gt;&lt;!-- YOUR GPG PASSPHRASE --&gt;&lt;/gpg.passphrase&gt;
+        &lt;test&gt;false&lt;/test&gt;
+      &lt;/properties&gt;
+    &lt;/profile&gt;
+  &lt;/profiles&gt;
+...
+&lt;/settings&gt;
+</code></pre></div></div>
+
+<h2 id="发行service-center">发行Service-Center</h2>
+
+<p><strong><em>准备和校验发行包</em></strong></p>
+
+<ol>
+  <li>克隆service-center代码。
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-service-center.git
+cd servicecomb-service-center
+gvt restore
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在master分支上打上准备发布版本的标签。</p>
+  </li>
+  <li>
+    <p>运行RAT工具，检查所有源文件头都有合法的ASF声明, 请参考<a href="https://github.com/apache/servicecomb-service-center/tree/master/docs/release">该文档</a>。</p>
+  </li>
+  <li>
+    <p>运行<code class="highlighter-rouge">make_release.sh</code>脚本，请参考<a href="https://github.com/apache/servicecomb-service-center/tree/master/scripts/release">该文档</a>。</p>
+  </li>
+  <li>
+    <p>上一步将会在根目录下生成发行包。</p>
+  </li>
+  <li>
+    <p>在Linux与Windows环境下运行前端与service-center。</p>
+  </li>
+  <li>
+    <p>进行<a href="https://github.com/apache/servicecomb-service-center/tree/master/integration">集成测试</a>。</p>
+  </li>
+  <li>
+    <p>如果以上全部测试都通过了，将发行包分发给同事在不同机器上进行验证。</p>
+  </li>
+  <li>将标签推送到主仓库。</li>
+</ol>
+
+<p><strong><em>给发行包签名</em></strong></p>
+
+<ol>
+  <li>
+    <p>从Github下载要发行版本<a href="https://github.com/apache/servicecomb-service-center/tags">标签</a>的源码包。</p>
+  </li>
+  <li>
+    <p>生成Linux发行包，Windows发行包和源码包的签名和校验和。</p>
+  </li>
+  <li>
+    <p>上传发行版到<a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-service-center/">Apache发行开发仓库</a>.</p>
+  </li>
+  <li>
+    <p>从SVN下载发行包，验证签名和校验。</p>
+  </li>
+</ol>
+
+<p><strong><em>PMC批准</em></strong></p>
+
+<ol>
+  <li>
+    <p>发送投票邮件至 <strong><em>dev@servicecomb.apache.org</em></strong>， 发起PMC批准.</p>
+  </li>
+  <li>
+    <p>等待72小时，或者获得3票+1并且没有-1。如果有-1票，修正问题并从<strong><em>第1步</em></strong>重新开始。</p>
+  </li>
+  <li>
+    <p>将投票结果发布到dev@servicecomb.apache.org。</p>
+  </li>
+</ol>
+
+<p><strong><em>通告</em></strong></p>
+
+<ol>
+  <li>
+    <p>上传发行包至<a href="https://dist.apache.org/repos/dist/release/servicecomb/servicecomb-service-center/">Apache发行仓库</a>。</p>
+  </li>
+  <li>
+    <p>等待24小时，让所有镜像同步。</p>
+  </li>
+  <li>
+    <p>将<a href="https://dist.apache.org/repos/dist/dev">dev</a>的文件移动到<a href="https://dist.apache.org/repos/dist/release">release</a>目录中，同时确认已经被存档,同时更新网站上相关链接。</p>
+  </li>
+  <li>
+    <p>上传发行页面至ServiceComb网站。</p>
+  </li>
+  <li>
+    <p>发送发行通告邮件到dev@servicecomb.apache.org， announce@apache.org。</p>
+  </li>
+</ol>
+
+<h2 id="发行java-chassis">发行Java-Chassis</h2>
+
+<p><strong><em>准备和校验发行包</em></strong></p>
+
+<ol>
+  <li>如果<code class="highlighter-rouge">~/.gnupg</code>中没有GPG密钥文件，则将GPG密钥文件拷贝至<code class="highlighter-rouge">~/.gnupg</code>文件夹。
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  gpg.conf
+  pubring.gpg
+  random_seed
+  secring.gpg
+  trustdb.gpg
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>更新<code class="highlighter-rouge">~/.m2/settings.xml</code>文件中的GPG密码。</p>
+  </li>
+  <li>
+    <p>更新<code class="highlighter-rouge">~/.m2/settings.xml</code>文件中的Apache帐户用户名和密码。</p>
+  </li>
+  <li>克隆java-chassis代码
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-java-chassis.git
+</code></pre></div>    </div>
+  </li>
+  <li>使用以下perl命令，替换所有pom.xml文件中的版本号并提交改动至本地
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>find . -name 'pom.xml'|xargs perl -pi -e 's/1.0.0-m2-SNAPSHOT/1.0.0-m2/g'
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在需要release的分支上打上准备发布版本的标签。</p>
+  </li>
+  <li>运行以下命令
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean deploy -DskipTests -Prelease -Pdistribution -Ppassphrase
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>如果执行失败，需要解决问题，从步骤7重新开始。</p>
+  </li>
+  <li>
+    <p>如果步骤7命令执行成功，则所有的jar包都已经成功上传至maven临时仓库。<br />
+使用apache帐号登录到<a href="https://repository.apache.org/">Apache Nexus</a>，点击“Staging Repositories”，搜索“servicecomb”，根据时间找到最近的java-chassis相关的记录，close该条记录，得到maven临时仓库的链接，例如：<code class="highlighter-rouge">https://repository.apache.org/content/repositories/orgapacheservicecomb-1385</code></p>
+  </li>
+  <li>将release分支以及标签分别push至主仓库。</li>
+</ol>
+
+<p><strong><em>给发行包签名</em></strong></p>
+
+<ol>
+  <li>
+    <p>从临时仓库下载二进制包及签名<br />
+  例如：<br />
+  <code class="highlighter-rouge">https://repository.apache.org/content/repositories/orgapacheservicecomb-1385/org/apache/servicecomb/apache-servicecomb-java-chassis-distribution/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip</code><br />
+  <code class="highlighter-rouge">https://repository.apache.org/content/repositories/orgapacheservicecomb-1385/org/apache/servicecomb/apache-servicecomb-java-chassis-distribution/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip.asc</code></p>
+  </li>
+  <li>
+    <p>从临时仓库下载源码包及签名<br />
+  例如：<br />
+  <code class="highlighter-rouge">https://repository.apache.org/content/repositories/orgapacheservicecomb-1385/org/apache/servicecomb/apache-servicecomb-java-chassis-distribution/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip</code><br />
+  <code class="highlighter-rouge">https://repository.apache.org/content/repositories/orgapacheservicecomb-1385/org/apache/servicecomb/apache-servicecomb-java-chassis-distribution/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip.asc</code></p>
+  </li>
+  <li>
+    <p>生成二进制包和源码包的校验和<br />
+  例如：<br />
+  <code class="highlighter-rouge">sha512sum -b apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip &gt; apache-servicecomb-java-chassis-distribution-1.2.0-bin.zi.sha512</code><br />
+  <code class="highlighter-rouge">sha512sum -b apache-servicecomb-java-chassis-distribution-1.2.0-src.zip &gt; apache-servicecomb-java-chassis-distribution-1.2.0-src.zip.sha512</code></p>
+  </li>
+  <li>将步骤11、12、13相关的文件，上传到<a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-java-chassis/">Apache开发仓库</a>.<br />
+  SVN命令：
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  svn co https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-java-chassis
+  cd serviecomb-java-chassis
+  mkdir -p 1.2.0/rc01
+  cp xxx/* 1.2.0/rc01
+  svn add 1.2.0/rc01
+  svn ci 1.2.0/rc01
+</code></pre></div>    </div>
+  </li>
+  <li>从SVN下载发行包，验证签名和校验。</li>
+</ol>
+
+<p><strong><em>PMC批准</em></strong></p>
+
+<ol>
+  <li>
+    <p>发送投票邮件至 <strong><em>dev@servicecomb.apache.org</em></strong>， 发起PMC批准.</p>
+  </li>
+  <li>
+    <p>等待72小时，或者获得3票+1并且没有-1。如果有-1票，修正问题，并删除主仓库的release版本对应的标签，并从<strong><em>第1步</em></strong>重新开始。</p>
+  </li>
+  <li>
+    <p>将投票结果发布到dev@servicecomb.apache.org。</p>
+  </li>
+</ol>
+
+<p><strong><em>通告</em></strong></p>
+
+<ol>
+  <li>将<a href="https://dist.apache.org/repos/dist/dev">dev</a>的文件移动到<a href="https://dist.apache.org/repos/dist/release">release</a>目录中，同时确认已经被存档,同时更新网站上相关链接。
+同时删除<a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-java-chassis/">Apache开发仓库</a>中的目录
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>svn rm -r 1.2.0
+checkin?
+</code></pre></div>    </div>
+    <p>使用apache帐号登录到<a href="https://repository.apache.org/">Apache Nexus</a>，点击“Staging Repositories”，搜索“servicecomb”，选中java-chassis相关的所有记录，点击“Drop”。</p>
+
+    <p>使用apache帐号登录到<a href="https://repository.apache.org/">Apache Nexus</a>，点击“Staging Repositories”，搜索“servicecomb”，找到需要发布的java-chassis记录，点击“Release”。</p>
+  </li>
+  <li>
+    <p>等待24小时，让所有镜像同步。</p>
+  </li>
+  <li>
+    <p>上传发行页面至ServiceComb网站。
+   fork https://github.com/apache/servicecomb-website/
+   1.总版本，url
+   2.java-chassis的RN和download（url）
+   3.中文、英文
+   PR</p>
+  </li>
+  <li>发送发行通告邮件到dev@servicecomb.apache.org， announce@apache.org。</li>
+</ol>
+
+<h2 id="发行pack">发行Pack</h2>
+
+<p><strong><em>准备和校验发行包</em></strong></p>
+
+<ol>
+  <li>如果<code class="highlighter-rouge">~/.gnupg</code>中没有GPG密钥文件，则将GPG密钥文件拷贝至<code class="highlighter-rouge">~/.gnupg</code>文件夹。
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  gpg.conf
+  pubring.gpg
+  random_seed
+  secring.gpg
+  trustdb.gpg
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>更新<code class="highlighter-rouge">~/.m2/settings.xml</code>文件中的GPG密码。</p>
+  </li>
+  <li>
+    <p>更新<code class="highlighter-rouge">~/.m2/settings.xml</code>文件中的Apache帐户用户名和密码。</p>
+  </li>
+  <li>克隆Pack代码。
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-pack.git
+</code></pre></div>    </div>
+  </li>
+  <li>使用以下perl命令，替换所有pom.xml文件中的版本号并提交改动至本地。
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>find . -name 'pom.xml'|xargs perl -pi -e 's/1.0.0-m2-SNAPSHOT/1.0.0-m2/g'
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在需要release的分支上打上准备发布版本的标签。</p>
+  </li>
+  <li>运行以下命令。
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn deploy -DskipTests -Prelease -Pdistribution -Ppassphrase
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>上述命令执行成功，所有的jar包都成功上传至临时仓库后，运行门槛测试以验证基本功能, 如果执行失败，需要解决问题，从步骤7重新开始。</p>
+  </li>
+  <li>
+    <p>如果步骤7命令执行成功，则所有的jar包都已经成功上传至maven临时仓库。<br />
+使用apache帐号登录到<a href="https://repository.apache.org/">Apache Nexus</a>，点击“Staging Repositories”，搜索“servicecomb-pack”，根据时间找到最近的pack相关的记录，close该条记录，得到maven临时仓库的链接，例如：<code class="highlighter-rouge">https://repository.apache.org/content/repositories/orgapacheservicecomb-1385</code></p>
+  </li>
+  <li>将release分支以及标签分别push至主仓库。</li>
+</ol>
+
+<p><strong><em>给发行包签名</em></strong></p>
+
+<ol>
+  <li>
+    <p>从临时仓库下载二进制包和源码包。</p>
+  </li>
+  <li>
+    <p>生成二进制包和源码包的签名和校验和。</p>
+  </li>
+  <li>
+    <p>上传发行包到<a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-pack/">Apache发行开发仓库</a>.</p>
+  </li>
+  <li>
+    <p>从SVN下载发行包，验证签名和校验。</p>
+  </li>
+</ol>
+
+<p><strong><em>PMC批准</em></strong></p>
+
+<ol>
+  <li>
+    <p>发送投票邮件至 <strong><em>dev@servicecomb.apache.org</em></strong>， 发起PMC批准.</p>
+  </li>
+  <li>
+    <p>等待72小时，或者获得3票+1并且没有-1。如果有-1票，修正问题并从<strong><em>第1步</em></strong>重新开始。</p>
+  </li>
+  <li>
+    <p>将投票结果发布到dev@servicecomb.apache.org。</p>
+  </li>
+</ol>
+
+<p><strong><em>通告</em></strong></p>
+
+<ol>
+  <li>
+    <p>上传发行包至<a href="https://dist.apache.org/repos/dist/release/servicecomb/servicecomb-pack/">Apache发行仓库</a>。</p>
+  </li>
+  <li>
+    <p>等待24小时，让所有镜像同步。</p>
+  </li>
+  <li>
+    <p>将<a href="https://dist.apache.org/repos/dist/dev">dev</a>的文件移动到<a href="https://dist.apache.org/repos/dist/release">release</a>目录中，同时确认已经被存档,同时更新网站上相关链接。</p>
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+            
+          </header>
+        
+      
+
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#验证java-chassis" id="markdown-toc-验证java-chassis">验证Java Chassis</a>    <ul>
+      <li><a href="#环境准备" id="markdown-toc-环境准备">环境准备</a></li>
+      <li><a href="#验证源代码包hash和签名正确" id="markdown-toc-验证源代码包hash和签名正确">验证源代码包Hash和签名正确</a></li>
+      <li><a href="#验证源代码功能正确" id="markdown-toc-验证源代码功能正确">验证源代码功能正确</a></li>
+      <li><a href="#验证staging-repository内的库正确" id="markdown-toc-验证staging-repository内的库正确">验证Staging Repository内的库正确</a></li>
+      <li><a href="#验证spring-cloud集成功能正确" id="markdown-toc-验证spring-cloud集成功能正确">验证Spring Cloud集成功能正确</a></li>
+      <li><a href="#验证samples是否正确可选" id="markdown-toc-验证samples是否正确可选">验证Samples是否正确（可选）</a></li>
+    </ul>
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+
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+
+<p>ServiceComb项目发新版本时，会发起投票邀请大家验证新版本的代码和Repo是否正确，本文向大家介绍如何进行验证工作。</p>
+
+<h2 id="验证java-chassis">验证Java Chassis</h2>
+<h3 id="环境准备">环境准备</h3>
+<ol>
+  <li>请确保网络通畅；</li>
+  <li>请检查依赖软件已经正确安装：
+    <ul>
+      <li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">JDK1.8</a></li>
+      <li><a href="https://maven.apache.org/download.cgi">Maven 3.x</a></li>
+      <li><a href="https://www.docker.com/get-docker">Docker</a></li>
+    </ul>
+  </li>
+</ol>
+
+<blockquote>
+  <p>提示：如果验证环境操作系统是Windows，需要安装<a href="https://docs.docker.com/machine/install-machine/">Docker Machine</a></p>
+</blockquote>
+
+<h3 id="验证源代码包hash和签名正确">验证源代码包Hash和签名正确</h3>
+<p>请在Vote邮件中找到<strong>Release Candidate</strong>的URL，例如：</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Release Candidate : https://dist.apache.org/repos/dist/dev/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/rc-01/
+</code></pre></div></div>
+
+<p>在浏览器中打开，下载<code class="highlighter-rouge">src.zip</code>结尾的源代码压缩包，以及同名的<code class="highlighter-rouge">src.zip.asc</code>签名文件和<code class="highlighter-rouge">src.zip.sha512</code>哈希文件，保持三个文件在同一目录下。</p>
+
+<p>请在Vote邮件中找到<strong>Key</strong>的URL：</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Keys to verify the Release Candidate : https://dist.apache.org/repos/dist/dev/incubator/servicecomb/KEYS
+</code></pre></div></div>
+
+<p>在浏览器中打开，保存内容为KEYS文件并导入：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg <span class="nt">--import</span> KEYS
+</code></pre></div></div>
+
+<p>提示<code class="highlighter-rouge">Mohammad Asif Siddiqui (ServiceComb Code Signing Key) &lt;asifdxtreme@apache.org&gt;</code>成功导入或未变化（已导入过）</p>
+
+<p>验证签名：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg <span class="nt">--verify</span> xxx-src.zip.asc xxx-src.zip
+</code></pre></div></div>
+
+<p>提示<code class="highlighter-rouge">Good signature from "Mohammad Asif Siddiqui (ServiceComb Code Signing Key) &lt;asifdxtreme@apache.org&gt;"</code>代表签名正确。</p>
+
+<p>验证Hash：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">sha512sum</span> <span class="nt">-c</span> xxx-src.zip.sha512
+</code></pre></div></div>
+
+<p>提示<code class="highlighter-rouge">OK</code>代表Hash正确。</p>
+
+<h3 id="验证源代码功能正确">验证源代码功能正确</h3>
+<p>解压源代码：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>unzip xxx-src.zip
+</code></pre></div></div>
+
+<p>使用<code class="highlighter-rouge">cd</code>命令切换到解压出来的源代码根目录下，执行：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pit</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：如果如果验证环境操作系统是Windows：</p>
+  <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pit</span> <span class="nt">-Pdocker-machine</span>
+</code></pre></div>  </div>
+</blockquote>
+
+<p>等待所有的测试通过，依据配置环境不同，约耗时10~30分钟。</p>
+
+<h3 id="验证staging-repository内的库正确">验证Staging Repository内的库正确</h3>
+<p>首先删除本地Repo中ServiceComb的全部缓存：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">rm</span> <span class="nt">-rf</span> /root/.m2/repository/org/apache/servicecomb/
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：如果不是root用户，请修改对应的路径</p>
+</blockquote>
+
+<p>请在Vote邮件中找到<strong>Staging Repository</strong>的URL：</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Staging Repository : https://repository.apache.org/content/repositories/orgapacheservicecomb-xxxx/
+</code></pre></div></div>
+
+<p>之后在maven的<code class="highlighter-rouge">settings.xml</code>中添加Staging Repository地址配置：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;settings&gt;</span>
+	<span class="nt">&lt;profiles&gt;</span>
+	   <span class="nt">&lt;profile&gt;</span>
+		  <span class="nt">&lt;repositories&gt;</span>
+			<span class="nt">&lt;repository&gt;</span>
+			  <span class="nt">&lt;releases</span> <span class="nt">/&gt;</span>
+			  <span class="nt">&lt;snapshots&gt;</span>
+				<span class="nt">&lt;enabled&gt;</span>false<span class="nt">&lt;/enabled&gt;</span>
+			  <span class="nt">&lt;/snapshots&gt;</span>
+			  <span class="nt">&lt;id&gt;</span>repo.apache.staging<span class="nt">&lt;/id&gt;</span>
+			  <span class="nt">&lt;url&gt;</span>{Vote邮件中的Staging Repository URL}<span class="nt">&lt;/url&gt;</span>
+			<span class="nt">&lt;/repository&gt;</span>
+		  <span class="nt">&lt;/repositories&gt;</span>
+		  <span class="nt">&lt;pluginRepositories&gt;</span>
+			<span class="nt">&lt;pluginRepository&gt;</span>
+			  <span class="nt">&lt;releases</span> <span class="nt">/&gt;</span>
+			  <span class="nt">&lt;snapshots&gt;</span>
+				<span class="nt">&lt;enabled&gt;</span>false<span class="nt">&lt;/enabled&gt;</span>
+			  <span class="nt">&lt;/snapshots&gt;</span>
+			  <span class="nt">&lt;id&gt;</span>repo.apache.staging<span class="nt">&lt;/id&gt;</span>
+			  <span class="nt">&lt;url&gt;</span>{Vote邮件中的Staging Repository URL}<span class="nt">&lt;/url&gt;</span>
+			<span class="nt">&lt;/pluginRepository&gt;</span>
+		  <span class="nt">&lt;/pluginRepositories&gt;</span>
+		  <span class="nt">&lt;id&gt;</span>staging<span class="nt">&lt;/id&gt;</span>
+		<span class="nt">&lt;/profile&gt;</span>
+	<span class="nt">&lt;/profiles&gt;</span>
+<span class="nt">&lt;/settings&gt;</span>
+</code></pre></div></div>
+
+<p>一切就绪后，使用<code class="highlighter-rouge">cd</code>命令切换到<strong>源代码demo目录(注意不是根目录)下</strong>，执行：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：如果如果验证环境操作系统是Windows：</p>
+  <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span> <span class="nt">-Pdocker-machine</span>
+</code></pre></div>  </div>
+</blockquote>
+
+<p><strong>测试过程中可以观察到Java Chassis的依赖将从我们之前指定的Apache Staging Repository下载：</strong></p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Downloading: https://repository.apache.org/content/repositories/orgapacheservicecomb-xxxx/xxxx.pom
+</code></pre></div></div>
+
+<p>等待所有的测试通过，依据配置环境不同，约耗时5~15分钟。</p>
+
+<h3 id="验证spring-cloud集成功能正确">验证Spring Cloud集成功能正确</h3>
+<p>从https://github.com/ServiceComb/ServiceComb-Company-WorkShop Clone最新Company示例项目代码，切换到<code class="highlighter-rouge">1.x</code>分支：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git
+git checkout 1.x
+</code></pre></div></div>
+
+<p>修改项目根目录中的<code class="highlighter-rouge">pom.xml</code>，更改其中的<code class="highlighter-rouge">&lt;java-chassis.version&gt;</code>配置为当前发版版本，例如1.0.0-m2：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;properties&gt;</span>
+  <span class="nt">&lt;java-chassis.version&gt;</span>1.0.0-m2<span class="nt">&lt;/java-chassis.version&gt;</span>
+<span class="nt">&lt;/properties&gt;</span>
+</code></pre></div></div>
+
+<p>在项目根目录下执行：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean verify <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：如果如果验证环境操作系统是Windows：</p>
+  <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean verify <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span> <span class="nt">-Pdocker-machine</span>
+</code></pre></div>  </div>
+</blockquote>
+
+<p>等待所有的测试通过，依据配置环境不同，约耗时5~10分钟。</p>
+
+<h3 id="验证samples是否正确可选">验证Samples是否正确（可选）</h3>
+<p>在源代码的sample下有很多例子，可以任选几个测试，例如使用BMI做验证；sample验证的方法请参见对应目录下README.md中的说明即可。</p>
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content/cn/developers/setup-committer-rights/index.html

diff --git a/content/cn/developers/setup-committer-rights/index.html b/content/cn/developers/setup-committer-rights/index.html
new file mode 100644
index 0000000..b8ce412
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@@ -0,0 +1,653 @@
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+      <div class="back-to-home"><a href="/cn/">首页</a> > Committer权限设置</div>
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+        
+          
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+        
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+    
+      <li>
+        
+          
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+    <meta itemprop="headline" content="Committer权限设置">
+    <meta itemprop="description" content="How to set up repo write rights for committer">
+    
+    <meta itemprop="dateModified" content="May 08, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Committer权限设置
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#授权-apache-账户" id="markdown-toc-授权-apache-账户">授权 Apache 账户</a></li>
+  <li><a href="#授权-github-账户" id="markdown-toc-授权-github-账户">授权 Github 账户</a></li>
+  <li><a href="#加入-apache-github-组织" id="markdown-toc-加入-apache-github-组织">加入 Apache Github 组织</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>恭喜您成为Apache ServiceComb 项目宝贵的 committer !</p>
+
+<p>本文将指导您设置对 Github 上托管的 Apache ServiceComb 仓库的权限。</p>
+
+<p>如果您已经是Apache ServiceComb 项目的 committer，需要完成下面三个简单的步骤才能获得这些权限：</p>
+
+<ul>
+  <li>对 Apache 账号授权</li>
+  <li>对 Github 账号授权</li>
+  <li>加入 Apache Github 组织</li>
+</ul>
+
+<p>在您喜欢的浏览器中打开 <a href="https://gitbox.apache.org/setup/">https://gitbox.apache.org/setup/</a> ，您应该能看到如下所示的页面</p>
+
+<p><img src="/assets/images/gitbox/apache-pre-auth.png" alt="pre authorization" class="align-center" /></p>
+
+<p>接下来开始授权！</p>
+
+<h2 id="授权-apache-账户">授权 Apache 账户</h2>
+<p>点击 <code class="highlighter-rouge">Start ASF Oauth</code> 链接并按照页面上的说明使用您的 Apache 账号登录。</p>
+
+<p><img src="/assets/images/gitbox/apache-auth.png" alt="apache account authorization" class="align-center" /></p>
+
+<h2 id="授权-github-账户">授权 Github 账户</h2>
+<p>首先需要在 Github 账号上<a href="https://github.com/settings/security">启用2FA</a> 安全设置。</p>
+
+<p>如果2FA成功设置，您的Github账号安全设置页面应如下图所示。</p>
+
+<p><img src="/assets/images/gitbox/github-2fa.png" alt="github 2FA" class="align-center" /></p>
+
+<p>更多安全设置资料请参考 <a href="https://help.github.com/articles/securing-your-account-with-two-factor-authentication-2fa/">Github 2FA 资料</a>。</p>
+
+<p>设置好 Github 2FA后，点击 <code class="highlighter-rouge">Auth on GitHub</code> 并按照说明授权Github 账号。</p>
+
+<p><img src="/assets/images/gitbox/github-auth.png" alt="github account authorization" class="align-center" /></p>
+
+<h2 id="加入-apache-github-组织">加入 Apache Github 组织</h2>
+<p>打开 <a href="https://id.apache.org/">https://id.apache.org/</a> 并登陆到您的 Apache 账户。</p>
+
+<p>登陆后，填写您的 github 账户用户名并保存：</p>
+
+<p><img src="/assets/images/gitbox/link-apache-github-id.png" alt="github account linking" class="align-center" /></p>
+
+<p>此后不久（30分钟内）将向您发送组织邀请，您可以在 Github 上访问 <a href="https://github.com/apache/">Apache</a> 看看是否有待处理的邀请。这可能需要30分钟。</p>
+
+<p>然后接受邀请并等待您添加为 Apache ServiceComb 项目的 committer （您将通过电子邮件获取通知）。</p>
+
+<p>一旦您被授予权限，您将看到如下图所示的内容：</p>
+
+<p><img src="/assets/images/gitbox/apache-post-auth.png" alt="post authorization" class="align-center" /></p>
+
+<p>恭喜！现在您可以访问 Apache ServiceComb 项目，在该项目下您将有权限Merge开发者的PR。</p>
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diff --git a/content/cn/developers/setup-develop-environment/index.html b/content/cn/developers/setup-develop-environment/index.html
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+          <a href="/cn/developers/becomming-a-commiter"><span class="nav__sub-title nav__sub-title-with-url">成为Committer</span></a>
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+          <a href="/cn/developers/use-jira/"><span class="nav__sub-title nav__sub-title-with-url">JIRA使用方法</span></a>
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+    
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+        
+          
+          
+
+          <a href="/cn/developers/use-gitter/"><span class="nav__sub-title nav__sub-title-with-url">Gitter 使用方法</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">设置代码仓库写权限</span></a>
+        
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+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/release-guide/"><span class="nav__sub-title nav__sub-title-with-url">Servicecomb发版指南</span></a>
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+        
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+          <a href="/cn/developers/release-validation-guide/"><span class="nav__sub-title nav__sub-title-with-url">ServiceComb发版验证指南</span></a>
+        
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+          <a href="/cn/developers/sonarcloud-how-to/"><span class="nav__sub-title nav__sub-title-with-url">SonarCloud集成指南</span></a>
+        
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+  </ul>
+</nav>
+
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+  </div>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="开发环境准备">
+    <meta itemprop="description" content="开发环境准备">
+    
+    <meta itemprop="dateModified" content="June 24, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">开发环境准备
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#基本环境准备" id="markdown-toc-基本环境准备">基本环境准备</a></li>
+  <li><a href="#git配置" id="markdown-toc-git配置">Git配置</a></li>
+  <li><a href="#ide-环境配置" id="markdown-toc-ide-环境配置">IDE 环境配置</a>    <ul>
+      <li><a href="#intellij-idea-配置" id="markdown-toc-intellij-idea-配置">IntelliJ IDEA 配置</a></li>
+    </ul>
+  </li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="基本环境准备">基本环境准备</h2>
+<p>在您开始前，请确保以下应用已安装：</p>
+<ul>
+  <li><strong>Git</strong>，安装详情可参考<a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git" target="_blank">Git安装教程</a></li>
+  <li><strong>JDK 1.8</strong>，安装详情可参考<a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">JDK安装教程</a></li>
+  <li><strong>Maven 3.x</strong>，安装详情可参考<a href="https://maven.apache.org/install.html" target="_blank">Maven安装教程</a></li>
+  <li><strong>Docker</strong>，安装详情可参考<a href="https://docs.docker.com/engine/installation/" target="_blank">Docker 安装教程</a></li>
+  <li><strong>Service Center</strong>, 安装详情可参考<a href="/cn/docs/service-center/install/">Service Center安装教程</a></li>
+  <li><strong>IntelliJ Idea IDE</strong>(可选，您可以使用其他心仪的IDE，如eclipse)，安装详情可参考<a href="https://www.jetbrains.com/help/idea/installing-and-launching.html" target="_blank">IntelliJ安装教程</a></li>
+</ul>
+
+<h2 id="git配置">Git配置</h2>
+<ol>
+  <li>注册Github。由于ServiceComb的代码是托管在Github上的，所以您需要有一个Github的帐号，可前往 <a href="https://github.com/join?source=header-home">https://github.com/join?source=header-home</a> 进行注册，如您已有Github帐号，则可跳过此步。注册完成后直接在 <a href="https://github.com/login?return_to=%2Fjoin%3Fsource%3Dheader-home">https://github.com/login?return_to=%2Fjoin%3Fsource%3Dheader-home</a> 进行登录即可。</li>
+  <li>
+    <p>配置Git。主要配置Git的个人信息和设置免密码提交代码。个人信息可通过以下指令进行配置：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git config <span class="nt">--global</span> user.name &lt;your-user-name&gt;
+git config <span class="nt">--global</span> user.email &lt;your-email-address&gt;
+</code></pre></div>    </div>
+
+    <p>其中，请将&lt;your-user-name&gt;和&lt;your-email-address&gt;替换为您在Github上注册用到的用户名和邮箱信息。设置免密码提交代码可参考<a href="https://stackoverflow.com/a/8588786" target="_blank">Git免密码提交代码教程</a>。</p>
+  </li>
+  <li>
+    <p>获取项目代码。以 <a href="https://github.com/apache/servicecomb-java-chassis">ServiceComb-Java-Chassis</a> 项目为例，可直接执行以下指令获取代码：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-java-chassis.git
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="ide-环境配置">IDE 环境配置</h2>
+<p>现有支持Java开发的IDE很多，如Eclipse, IntelliJ IDEA和STS等。我们在此推荐使用IntelliJ IDEA，对于日常开发，其社区版的功能已经足够了。在安装完IntelliJ IDEA后，您可以根据<a href="https://www.jetbrains.com/help/idea/installing-and-launching.html#d325787e291">初始化设置教程</a>对IntelliJ IDEA进行配置，随后可通过阅读<a href="https://www.jetbrains.com/help/idea/keyboard-shortcuts-you-cannot-miss.html">必备快捷键</a>了解常用的快捷键。</p>
+
+<p>Java Chassis和Saga项目使用了<a href="https://github.com/google/styleguide">Google Code Style</a>作为代码风格，配置文件可以在本项目 <code class="highlighter-rouge">etc</code> 目录下找到。其中，目录中也有Eclipse的代码风格，读者可以直接导入使用。</p>
+
+<p><img src="/assets/images/intellij.code.style.3.png" alt="code style files" class="align-center" /></p>
+
+<aside class="sidebar__right">
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
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+    </ul>
+  </nav>
+</aside>
+
+<h3 id="intellij-idea-配置">IntelliJ IDEA 配置</h3>
+<p><a href="https://www.jetbrains.com/idea/download/">IntelliJ IDEA</a>的配置方法如下</p>
+
+<ol>
+  <li>
+    <p>打开IntelliJ配置
+<img src="/assets/images/intellij.code.style.4.png" alt="IntelliJ Settings" class="align-center" /></p>
+  </li>
+  <li>
+    <p>Import 配置文件 <code class="highlighter-rouge">etc/intellij-java-google-style.xml</code>
+<img src="/assets/images/intellij.code.style.1.png" alt="import code style" class="align-center" /></p>
+  </li>
+  <li>
+    <p>打开已修改而未提交的文件，并打开格式化文件对话框
+<img src="/assets/images/intellij.code.style.5.png" alt="reformat file dialog" class="align-center" /></p>
+  </li>
+  <li>
+    <p>选择只格式化修改部分
+<img src="/assets/images/intellij.code.style.2.png" alt="reformat options" class="align-center" /></p>
+  </li>
+</ol>
+
+<p>配置完成后，后续按快捷键 (Ctrl+Alt+i) 格式化修改文件即可。更多关于IntelliJ的使用技巧可阅读<a href="https://www.jetbrains.com/help/idea/tutorials.html">IntelliJ教程</a>。</p>
+
+<h2 id="下一步">下一步</h2>
+
+<ul>
+  <li>阅读<a href="/cn/developers/submit-codes/">代码提交指南</a></li>
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+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/cn/setup-develop-environment.md">在Github上编辑此页</a></li>
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+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
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+          
+            
+            
+            <a href=/developers/sonarcloud-how-to/>English</a>
+          
+        </div>
+      </nav>
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+    
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+        
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+    
+      <li>
+        
+          
+          
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+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">设置代码仓库写权限</span></a>
+        
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+        
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+    
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+        
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+          
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+        
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+</nav>
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+    <meta itemprop="headline" content="SonarCloud集成指南">
+    <meta itemprop="description" content="SonarCloud集成指南">
+    
+    <meta itemprop="dateModified" content="November 15, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">SonarCloud集成指南
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#步骤" id="markdown-toc-步骤">步骤</a>    <ul>
+      <li><a href="#关于浅克隆" id="markdown-toc-关于浅克隆">关于浅克隆</a></li>
+      <li><a href="#关于pr" id="markdown-toc-关于pr">关于PR</a></li>
+    </ul>
+  </li>
+  <li><a href="#参考资料" id="markdown-toc-参考资料">参考资料</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>本文向大家介绍如何在Apache ServiceComb中集成SonarCloud。</p>
+
+<h2 id="步骤">步骤</h2>
+
+<ol>
+  <li>首先你是Github的Apache组织的成员。</li>
+  <li>用你的Github账号登录 <a href="https://sonarcloud.io">sonarcloud.io</a>。</li>
+  <li>在 <a href="https://issues.apache.org/jira/projects/INFRA/">Jira Infrastructure </a> 创建一个JIRA请求在SonarCloud中创建项目，样式可参考<a href="https://issues.apache.org/jira/browse/INFRA-19444">这个</a>。在这个JIRA中要提供仓库的Github地址，project-key（在SonarCloud中唯一表示你项目的ID），作为项目Admin的Github账号，一般来说就是你自己。</li>
+  <li>等待INFRA团队替你创建项目。然后你能在SonarCloud中看到了。</li>
+  <li>根据SonarCloud中的指示修改你的<code class="highlighter-rouge">.travis.yml</code></li>
+</ol>
+
+<h3 id="关于浅克隆">关于浅克隆</h3>
+
+<p>Travis<a href="https://docs.travis-ci.com/user/customizing-the-build/#git-clone-depth">默认使用浅克隆</a>，而 SonarCloud需要commit信息，因此你需要禁用浅克隆：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">git</span><span class="pi">:</span>
+  <span class="na">depth</span><span class="pi">:</span> <span class="no">false</span>
+</code></pre></div></div>
+
+<h3 id="关于pr">关于PR</h3>
+
+<p>因为Travis不支持在PR中启用SonarCloud集成，因此你需要对构建脚本做类似下面的改动：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">echo</span> <span class="s2">"TRAVIS_PULL_REQUEST=</span><span class="nv">$TRAVIS_PULL_REQUEST</span><span class="s2">"</span>
+<span class="k">if</span> <span class="o">[</span> <span class="s2">"</span><span class="nv">$TRAVIS_PULL_REQUEST</span><span class="s2">"</span> <span class="o">==</span> <span class="s2">"false"</span> <span class="o">]</span><span class="p">;</span> <span class="k">then
+  </span><span class="nb">echo</span> <span class="s2">"Not a pull request build, running build with sonar"</span>
+  mvn ... sonar:sonar <span class="nt">-Dsonar</span>.projectKey<span class="o">=</span>&lt;project-key&gt;
+<span class="k">else
+  </span><span class="nb">echo</span> <span class="s2">"Pull request build or local build"</span>
+  mvn ...
+<span class="k">fi</span><span class="p">;</span>
+</code></pre></div></div>
+
+<h2 id="参考资料">参考资料</h2>
+
+<ul>
+  <li><a href="https://cwiki.apache.org/confluence/display/INFRA/SonarQube+Analysis">Apache CWiki - SonarQube Analysis</a></li>
+  <li><a href="https://docs.travis-ci.com/user/sonarcloud/">Travis - SonarCloud</a></li>
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content/cn/developers/submit-codes/index.html

diff --git a/content/cn/developers/submit-codes/index.html b/content/cn/developers/submit-codes/index.html
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+    <meta itemprop="headline" content="代码提交指南">
+    <meta itemprop="description" content="介绍如何向 ServiceComb 项目提交代码">
+    
+    <meta itemprop="dateModified" content="September 08, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">代码提交指南
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#贡献途径" id="markdown-toc-贡献途径">贡献途径</a></li>
+  <li><a href="#运行测试" id="markdown-toc-运行测试">运行测试</a></li>
+  <li><a href="#pr指南" id="markdown-toc-pr指南">PR指南</a>    <ul>
+      <li><a href="#fork仓库" id="markdown-toc-fork仓库">Fork仓库</a></li>
+      <li><a href="#配置git和提交修改" id="markdown-toc-配置git和提交修改">配置git和提交修改</a></li>
+      <li><a href="#创建pr" id="markdown-toc-创建pr">创建PR</a></li>
+      <li><a href="#冲突解决" id="markdown-toc-冲突解决">冲突解决</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="贡献途径">贡献途径</h2>
+<p>　　ServiceComb正在不断成长中，也希望能找到更多志同道合的同伴一起成长和进步。向ServiceComb 贡献的途径有多种：</p>
+<ul>
+  <li>完善文档。完善网站上的文档或者项目中的介绍文档和API说明文档。其中，网站文档的完善可通过网站最底端的<strong>报告本网页问题</strong>或<strong>在Github上编辑此页</strong>对文档内容进行完善。</li>
+  <li>
+    <p>实现功能特性需求或修复BUG。项目的功能特性需求或者已发现但未修复的BUG都会在项目中的issue处看到，以<a href="https://github.com/apache/servicecomb-saga/issues">Saga</a>项目为例，一般都会带有类似 <strong>enhancement</strong> 或类似 <strong>bug</strong> 的标签来说明这是功能需求还是BUG，读者可以结合自己的兴趣点来选择。此外，您也可以通过日常使用或阅读代码时发现BUG并以Issue的方式进行描述并针对该BUG提交PR，帮助我们进一步改进。同时，也欢迎您提出需求并在实现后提交PR。</p>
+
+    <p><img src="/assets/images/find-features-by-example.png" alt="寻觅功能需求示例" class="align-center" /></p>
+  </li>
+</ul>
+
+<h2 id="运行测试">运行测试</h2>
+<p>　　在您提交代码前，请先按照项目README中说明的自动测试部分对代码的功能性和实现上的正确性进行验证。</p>
+
+<h2 id="pr指南">PR指南</h2>
+<p>　　在 <a href="https://github.com/search?q=org%3Aapache+servicecomb">Github</a> 上面可以很方便地提交 <a href="https://help.github.com/articles/about-pull-requests/">Pull Request (PR)</a>，下面将以本网站项目<a href="https://github.com/apache/servicecomb-website">apache/servicecomb-website</a> 为例（如果是其他项目，请替换项目名servicecomb-website）。</p>
+
+<h3 id="fork仓库">Fork仓库</h3>
+
+<p>　　进入 apache/servicecomb-website 的 <a href="https://github.com/apache/servicecomb-website">github 页面</a> ，点击右上角按钮 <code class="highlighter-rouge">Fork</code> 进行 Fork。</p>
+
+<p><img src="/assets/images/fork-repo.jpg" alt="体质指数应用运行界面" class="align-center" /></p>
+
+<h3 id="配置git和提交修改">配置git和提交修改</h3>
+
+<ul>
+  <li>
+    <p>将代码克隆到本地：</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/&lt;your_github_name&gt;/servicecomb-website.git
+</code></pre></div>    </div>
+
+    <p>注意：请将 &lt;your_github_name&gt; 替换为您的github名字。</p>
+  </li>
+</ul>
+
+<p>　　clone完成后，origin会默认指向github上的远程fork地址。</p>
+
+<ul>
+  <li>
+    <p>将 apache/servicecomb-website 添加为本地仓库的远程分支 upstream：</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd  </span>servicecomb-website
+git remote add upstream https://github.com/apache/servicecomb-website.git
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>检查远程仓库设置：</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git remote <span class="nt">-v</span>
+origin https://github.com/&lt;your_github_name&gt;/servicecomb-website.git <span class="o">(</span>fetch<span class="o">)</span>
+origin    https://github.com/&lt;your_github_name&gt;/servicecomb-website.git <span class="o">(</span>push<span class="o">)</span>
+upstream  https://github.com/apache/servicecomb-website.git <span class="o">(</span>fetch<span class="o">)</span>
+upstream  https://github.com/apache/servicecomb-website.git <span class="o">(</span>push<span class="o">)</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>新建分支以便在分支上做修改：</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git checkout <span class="nt">-b</span> &lt;your_branch_name&gt;
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>　　注意： &lt;your_branch_name&gt; 为您自定义的分支名字。</p>
+
+<p>　　创建完成后可进行代码更改。</p>
+
+<ul>
+  <li>
+    <p>提交代码到远程分支：</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git commit <span class="nt">-a</span> <span class="nt">-m</span> <span class="s2">"&lt;you_commit_message&gt;"</span>
+git push origin &lt;your_branch_name&gt;
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>　　更多 git 使用方法请访问：<a href="https://www.atlassian.com/git/tutorials/setting-up-a-repository">git 使用</a>，这里不赘述。</p>
+
+<h3 id="创建pr">创建PR</h3>
+
+<p>　　在浏览器切换到自己的 github 页面，切换分支到提交的分支 &lt;your_branch_name&gt; ，依次点击 <code class="highlighter-rouge">New pull request</code> 和 <code class="highlighter-rouge">Create pull request</code> 按钮进行创建，如下图所示：</p>
+
+<p class="figure-caption"><img src="/assets/images/new-pr.jpg" alt="体质指数应用运行界面" class="align-center" />
+fig-1 New pull request</p>
+
+<p class="figure-caption"><img src="/assets/images/create-pr.jpg" alt="体质指数应用运行界面" class="align-center" />
+fig-2 Create pull request</p>
+
+<p>　　至此，您的PR创建完成，更多关于 PR 请阅读 <a href="https://help.github.com/categories/collaborating-with-issues-and-pull-requests/">collaborating-with-issues-and-pull-requests</a> 。</p>
+
+<h3 id="冲突解决">冲突解决</h3>
+<p>　　提交PR时的代码冲突一般是由于多人编辑同一个文件引起的，解决冲突主要通过以下步骤即可：</p>
+<ol>
+  <li>切换至主分支
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git checkout master
+</code></pre></div>    </div>
+  </li>
+  <li>同步远端主分支至本地
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git pull upstream master
+</code></pre></div>    </div>
+  </li>
+  <li>切换回刚才的分支（假设分支名为fix）
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git checkout fix
+</code></pre></div>    </div>
+  </li>
+  <li>进行rebase
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git rebase <span class="nt">-i</span> master
+</code></pre></div>    </div>
+    <p>此时会弹出修改记录的文件，一般直接保存即可。然后会提示哪些文件出现了冲突，此时可打开冲突文件对冲突部分进行修改，将提示的所有冲突文件的冲突都解决后，执行</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git add <span class="nb">.</span>
+git rebase <span class="nt">--continue</span>
+</code></pre></div>    </div>
+    <p>依此往复，直至屏幕出现类似 <em>rebase successful</em> 字样即可，此时您可以进行往提交PR的分支进行更新：</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git push <span class="nt">-f</span> origin fix
+</code></pre></div>    </div>
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diff --git a/content/cn/developers/submit-issues/index.html b/content/cn/developers/submit-issues/index.html
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+      <li>
+        
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+        
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+        
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+        
+          
+          
+
+          <a href="/cn/developers/use-jira/"><span class="nav__sub-title nav__sub-title-with-url">JIRA使用方法</span></a>
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+        
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+        
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+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">设置代码仓库写权限</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/release-guide/"><span class="nav__sub-title nav__sub-title-with-url">Servicecomb发版指南</span></a>
+        
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+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/release-validation-guide/"><span class="nav__sub-title nav__sub-title-with-url">ServiceComb发版验证指南</span></a>
+        
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+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/sonarcloud-how-to/"><span class="nav__sub-title nav__sub-title-with-url">SonarCloud集成指南</span></a>
+        
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+
+    
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+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="发现问题">
+    <meta itemprop="description" content="介绍如何向 ServiceComb 项目提交issue">
+    
+    <meta itemprop="dateModified" content="March 13, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">发现问题
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
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+  <li><a href="#创建issue" id="markdown-toc-创建issue">创建issue</a></li>
+  <li><a href="#参与讨论" id="markdown-toc-参与讨论">参与讨论</a></li>
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+
+  </nav>
+</aside>
+
+<h2 id="发现问题">发现问题</h2>
+<p>　　ServiceComb正在不断成长中，用户可以通过在github上提交issue的方式描述自己的问题或建议并发起讨论，帮助社区进一步改进。可以在issue上提出bug，建议，疑问或者寻求帮助等等</p>
+
+<h2 id="创建issue">创建issue</h2>
+<p>　　在对应github项目页面上，如java-chassis，点击右上角按钮<code class="highlighter-rouge">New issue</code>创建issue
+   <img src="/assets/images/submit-issues/find-issues-by-example.png" alt="创建issue示例" class="align-center" /></p>
+
+<p>　　issue内容推荐使用如下模板，建议先提供ServiceComb版本信息，程序运行环境信息，然后描述产生的bug和希望出现的结果，最后提供可以复现bug的操作步骤。这些信息都有助于其他人快速了解你的问题并参与解决。 <br />
+​    <img src="/assets/images/submit-issues/find-issues-write.png" alt="issue模板" class="align-center" /></p>
+
+<h2 id="参与讨论">参与讨论</h2>
+<p>　　在issue下可以很方便地参与讨论，如下图 <br />
+<img src="/assets/images/submit-issues/find-issues-comment.png" alt="参与讨论" class="align-center" /></p>
+
+<h2 id="关闭issue">关闭issue</h2>
+<p>　　通过讨论之后得出最终解决方案，issue将会被关闭，如有修改代码，需要提交PR，可参考<a href="http://servicecomb.apache.org/cn/developers/submit-codes/">代码提交指南</a></p>
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+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/cn/submit-issues.md">在Github上编辑此页</a></li>
+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
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+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">社区</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">邮件列表</span></a>
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+        <li>
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content/cn/developers/subscribe-mail-list/index.html

diff --git a/content/cn/developers/subscribe-mail-list/index.html b/content/cn/developers/subscribe-mail-list/index.html
new file mode 100644
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+
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+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
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+          
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+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/team/"><span class="nav__sub-title nav__sub-title-with-url">开发团队</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/contributing"><span class="nav__sub-title nav__sub-title-with-url">如何做贡献</span></a>
+        
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+      <li>
+        
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+    <meta itemprop="headline" content="如何订阅Apache ServiceComb的邮件列表">
+    <meta itemprop="description" content="如何订阅Apache ServiceComb的邮件列表">
+    
+    <meta itemprop="dateModified" content="September 08, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">如何订阅Apache ServiceComb的邮件列表
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#0-前言" id="markdown-toc-0-前言">0 前言</a></li>
+  <li><a href="#step-1发送订阅邮件" id="markdown-toc-step-1发送订阅邮件">STEP 1：发送订阅邮件</a></li>
+  <li><a href="#step-2接收来自dev-helpservicecombapacheorg的确认邮件" id="markdown-toc-step-2接收来自dev-helpservicecombapacheorg的确认邮件">STEP 2：接收来自dev-help@servicecomb.apache.org的确认邮件</a></li>
+  <li><a href="#step-3--回复确认邮件" id="markdown-toc-step-3--回复确认邮件">STEP 3:  回复确认邮件</a></li>
+  <li><a href="#step-4接收欢迎邮件" id="markdown-toc-step-4接收欢迎邮件">STEP 4：接收欢迎邮件</a></li>
+  <li><a href="#step-5--发起邮件讨论可选" id="markdown-toc-step-5--发起邮件讨论可选">STEP 5:  发起邮件讨论（可选）</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="0-前言">0 前言</h2>
+
+<p>​	邮件列表（Mail List）是一个成熟开源社区的“枢纽”。通常来说，开源社区的提问与解答、技术讨论、事务决策等都通过邮件列表来承载。邮件列表异步、广播的特性，也非常适合开源社区的沟通交流。那么，如何订阅Apache ServiceComb的邮件列表呢？</p>
+
+<h2 id="step-1发送订阅邮件">STEP 1：发送订阅邮件</h2>
+
+<p>打开自己的邮箱，新建邮件，向<code class="highlighter-rouge">dev-subscribe@servicecomb.apache.org</code>发送一封邮件（邮件主题和内容任意）</p>
+
+<blockquote>
+  <p><img src="/assets/images/subscribe-mail-list-step1.png" alt="step1" class="align-center" /></p>
+</blockquote>
+
+<h2 id="step-2接收来自dev-helpservicecombapacheorg的确认邮件">STEP 2：接收来自dev-help@servicecomb.apache.org的确认邮件</h2>
+
+<p>​	执行完第一步之后，您将收到一封来自<code class="highlighter-rouge">dev-help@servicecomb.apache.org</code>的确认邮件，邮件内容如下图所示。（<strong>如果长时间未能收到，请确认该邮件是否已被拦截，或已经被自动归入“订阅邮件”、“垃圾邮件”、“推广邮件”等文件夹</strong>）</p>
+
+<blockquote>
+  <p><img src="/assets/images/subscribe-mail-list-step2.png" alt="step2" class="align-center" /></p>
+</blockquote>
+
+<h2 id="step-3--回复确认邮件">STEP 3:  回复确认邮件</h2>
+
+<p>​针对上一步接收到的邮件，</p>
+
+<p>​<strong>a.直接回复该邮件</strong></p>
+
+<p>​<strong><em>或</em></strong></p>
+
+<p><strong>b. 新建一封<code class="highlighter-rouge">收件人</code>为上一步中的<code class="highlighter-rouge">回复地址</code>的邮件</strong></p>
+
+<p>​均可，内容主题不限</p>
+
+<blockquote>
+  <p><img src="/assets/images/subscribe-mail-list-step3.png" alt="step3" class="align-center" /></p>
+</blockquote>
+
+<h2 id="step-4接收欢迎邮件">STEP 4：接收欢迎邮件</h2>
+
+<p>​	完成第三步之后，将会受到一封标题为<strong>WELCOME to dev@servicecomb.apache.org</strong>的欢迎邮件。至此，订阅邮件列表的工作已经完成了，社区的动态都会通过邮件的方式通知您。</p>
+
+<blockquote>
+  <p><img src="/assets/images/subscribe-mail-list-step4.png" alt="step4" class="align-center" /></p>
+</blockquote>
+
+<h2 id="step-5--发起邮件讨论可选">STEP 5:  发起邮件讨论（可选）</h2>
+
+<p>​	成功订阅邮件列表后，若想发起讨论，直接往<code class="highlighter-rouge">dev@servicecomb.apache.org</code>发送邮件即可。所有订阅了邮件列表的人都会收到邮件。</p>
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+      <li>
+        
+          
+          
+
+          <a href="/cn/developers/contributing"><span class="nav__sub-title nav__sub-title-with-url">如何做贡献</span></a>
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+        
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+    
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+        
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+          <a href="/cn/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">设置代码仓库写权限</span></a>
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+        
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+    <meta itemprop="headline" content="ServiceComb开发团队">
+    <meta itemprop="description" content="ServiceComb 开发团队">
+    
+    <meta itemprop="dateModified" content="June 01, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb开发团队
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>本页面展示了ServiceComb的开发团队。大家可以通过提PR的方式把自己的信息添加到列表上。注：名字是按照字母顺序进行排列的。</p>
+
+<ul>
+  <li>Committers</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>Apache ID</th>
+      <th>Name</th>
+      <th>Organization</th>
+      <th>PPMC</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>acsukesh</td>
+      <td>Sukesh A C</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>asifdxtream</td>
+      <td>Mohammad Asif Siddiqui</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>chanjarster</td>
+      <td>Daniel Qian</td>
+      <td>NewCapec</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>cherrylzhao</td>
+      <td>Zhao Jun</td>
+      <td>JD.com</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>ericlee</td>
+      <td>Li Dagang (Eric)</td>
+      <td>Tencent</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>jbonofre</td>
+      <td>Jean-Baptiste Onofre</td>
+      <td>Talend</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>liubao68</td>
+      <td>Liu Bao</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>little-cui</td>
+      <td>Cui Yihua</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>mabin</td>
+      <td>Ma Bin</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>ningjiang</td>
+      <td>Jiang Ning (Willem)</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>rvs</td>
+      <td>Roman Shaposhnik</td>
+      <td>Stealth</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>seanyinx</td>
+      <td>Yin Xiang (Sean)</td>
+      <td>Syswin</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>tnachen</td>
+      <td>Timothy Chen</td>
+      <td>Hyperpilot</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>wujimin</td>
+      <td>Wu Jimin</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>yaohaishi</td>
+      <td>Yao Haishi</td>
+      <td>Huawei</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>yangbor</td>
+      <td>Yang Bo</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zenlinTechnofreak</td>
+      <td>Lin Zhinan</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhangqi</td>
+      <td>Zhang qi</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhengyangyong</td>
+      <td>Zheng Yangyong</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhfeng</td>
+      <td>Feng Zheng</td>
+      <td>Redhat</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhanglei</td>
+      <td>Zhang Lei</td>
+      <td>BOCO</td>
+      <td> </td>
+    </tr>
+  </tbody>
+</table>
+
+<ul>
+  <li>Contributors:</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>Github ID</th>
+      <th>Name</th>
+      <th>Organization</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>aseTo2016</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>crystaldust</td>
+      <td>Ju Zheng</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>imlidian</td>
+      <td>Li Dian</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>imlijinting</td>
+      <td>Li Jinting</td>
+      <td>PICC</td>
+    </tr>
+    <tr>
+      <td>jeremyxu2010</td>
+      <td>Xu Xinjie</td>
+      <td>Tencent</td>
+    </tr>
+    <tr>
+      <td>jyseanl</td>
+      <td>Sean Li</td>
+      <td>Pactera</td>
+    </tr>
+    <tr>
+      <td>KomachiSion</td>
+      <td>Yang Yi</td>
+      <td>JD.com</td>
+    </tr>
+    <tr>
+      <td>laijianbin</td>
+      <td>Lai Jianbin</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>lijasonvip</td>
+      <td>Li bo</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>Lionelpang</td>
+      <td>Pang Mingshi</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>liuzhenyang</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>maheshrajus</td>
+      <td>Mahesh Raju Somalaraju</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>mt-monster</td>
+      <td> </td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>oliugian</td>
+      <td>Fu Chungen</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>sjh0027</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>SingleX</td>
+      <td>Gao Xing</td>
+      <td>CaiNiao</td>
+    </tr>
+    <tr>
+      <td>TankTian</td>
+      <td>Tian Min</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>tuohai666</td>
+      <td>Zhang Yonglun</td>
+      <td>JD.com</td>
+    </tr>
+    <tr>
+      <td>vibakar</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>weichao666</td>
+      <td>Wei Chao</td>
+      <td>ISoftStone</td>
+    </tr>
+    <tr>
+      <td>withLin</td>
+      <td>Fu JinLin</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>wuzunqian</td>
+      <td>Wu Zunqian</td>
+      <td>Yongyou</td>
+    </tr>
+    <tr>
+      <td>xuyiyun0929</td>
+      <td>Xu Yiyun</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>xiaoyimei</td>
+      <td>Xiao Yimei</td>
+      <td>Changhong</td>
+    </tr>
+    <tr>
+      <td>zhanglongchun</td>
+      <td>Zhang LongChun</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>zhang2014</td>
+      <td>Zhang Jian</td>
+      <td>OneAPM</td>
+    </tr>
+    <tr>
+      <td>zhuhoudong</td>
+      <td>Zhu Houdong</td>
+      <td> </td>
+    </tr>
+  </tbody>
+</table>
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+        <p class="header">ASF</p>
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+      </ul>
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+        <p class="header">贡献</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">报告本网页问题</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/cn/team.md">在Github上编辑此页</a></li>
+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
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+      </ul>
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+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">社区</p>
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+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">邮件列表</span></a>
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content/cn/developers/use-gitter/index.html

diff --git a/content/cn/developers/use-gitter/index.html b/content/cn/developers/use-gitter/index.html
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+  <meta name="twitter:description" content="介绍如何使用Gitter参与到ServiceComb开源开发">
+  <meta name="twitter:url" content="">
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+    <meta name="twitter:card" content="summary">
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+  <script type="application/ld+json">
+    {
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+      "@type" : "Person",
+      "name" : "Apache ServiceComb",
+      "url" : "https://github.com/pages/apache/incubator-servicecomb-website",
+      "sameAs" : null
+    }
+  </script>
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+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
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+<!-- end SEO -->
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+</script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>
+<script src="/assets/vendor/prism/prism.js"></script>
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+  src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML">
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+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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+    
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+        
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+    
+      <li>
+        
+          
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+    <meta itemprop="description" content="介绍如何使用Gitter参与到ServiceComb开源开发">
+    
+    <meta itemprop="dateModified" content="February 28, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Gitter 使用指南
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#gitter简介" id="markdown-toc-gitter简介">Gitter简介</a></li>
+  <li><a href="#使用链接登录" id="markdown-toc-使用链接登录">使用链接登录</a></li>
+  <li><a href="#安装手机客户端" id="markdown-toc-安装手机客户端">安装手机客户端</a></li>
+  <li><a href="#在gitter上搜索并加入servicecomb社区聊天室" id="markdown-toc-在gitter上搜索并加入servicecomb社区聊天室">在Gitter上搜索并加入ServiceComb社区聊天室</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="gitter简介">Gitter简介</h2>
+
+<p>Gitter 是一款可支持Markdown的针对开发者的即时通讯软件，可无缝关联到 github，可在聊天中关联Github上的PR，可留存讨论的相关历史记录，可查询历史记录，支持中英文。</p>
+
+<p>ServiceComb 和很多其他的开源项目一样，使用 Gitter 作为技术交流和社区发展的即时通讯媒介，本文介绍如何使用 Gitter 参与到 ServiceComb 的开源开发和社区发展中。</p>
+
+<h2 id="使用链接登录">使用链接登录</h2>
+
+<p>在浏览器 输入 <a href="https://gitter.im/ServiceCombUsers/Lobby">https://gitter.im/ServiceCombUsers/Lobby</a> ，会自动跳转到Gitter上ServiceComb社区的聊天室界面，如下：</p>
+
+<p><img src="/assets/images/login-gitter.PNG" alt="" class="align-center" /></p>
+
+<p>如上红圈所示，点击 <code class="highlighter-rouge">SIGN IN TO START TALKING</code> 进行登录，可支持两种登录方式，Github账号或Twitter账号，笔者使用 Github账号进行登录，如下：</p>
+
+<p><img src="/assets/images/login-gitter1.PNG" alt="" class="align-center" /></p>
+
+<p>点击红圈处后，输入Github账号和密码既可登录进聊天室，从此开始进行技术或社区讨论：</p>
+
+<p><img src="/assets/images/login-gitter2.PNG" alt="" class="align-center" /></p>
+
+<p>红圈1：当前社区的Github代码库上的最近的activity；</p>
+
+<p>红圈2：当前社区Gitter聊天室已加入的所有人；</p>
+
+<p>红圈3：搜索其他社区或者当前聊天室的相关话题记录；</p>
+
+<p>红圈4：发送聊天消息。</p>
+
+<p>至此，就可以像使用微信一样，使用Gitter，并获得比微信更加令开发者和技术人员舒服的功能，如，直接提及某个Activity进行讨论，直接搜索历史聊天记录等。</p>
+
+<p>已经加入聊天室的伙伴别忘记点击右上角的五角星进行点赞，这样会让本聊天室更容易被您自己找到。</p>
+
+<p><img src="/assets/images/login-gitter3.PNG" alt="" class="align-center" /></p>
+
+<p>只是使用Gitter来进行技术讨论或咨询的伙伴，以上功能就足够了，从此可以像使用微信一样游刃有余地使用，如对Gitter有兴趣或者希望创建私有聊天室的伙伴，可以参考：</p>
+
+<p><a href="http://www.gitter.net.cn/book/gitter/roomsettings-1.html">http://www.gitter.net.cn/book/gitter/roomsettings-1.html</a></p>
+
+<h2 id="安装手机客户端">安装手机客户端</h2>
+
+<p>您可以下载Gitter的手机客户端，在手机上也随时随地的参与到技术讨论中，下载链接：</p>
+
+<p><a href="https://gitter.im/home">https://gitter.im/home</a></p>
+
+<h2 id="在gitter上搜索并加入servicecomb社区聊天室">在Gitter上搜索并加入ServiceComb社区聊天室</h2>
+
+<p>已经在使用Gitter的伙伴，直接登录Gitter后，搜索 <code class="highlighter-rouge">ServiceComb</code> ，如下图：</p>
+
+<p><img src="/assets/images/login-gitter4.PNG" alt="" class="align-center" /></p>
+
+<p>点击<code class="highlighter-rouge">ServiceComb Users Community</code> 加入聊天室，其他的功能使用同上一章节，这里不赘述。</p>
+
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+        <li><a href="http://issues.apache.org/jira/browse/SCB">报告本网页问题</a></li>
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+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
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content/cn/developers/use-jira/index.html

diff --git a/content/cn/developers/use-jira/index.html b/content/cn/developers/use-jira/index.html
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+<!doctype html>
+<!--
+  Minimal Mistakes Jekyll Theme 4.4.1 by Michael Rose
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+  <li><a href="#查看issues" id="markdown-toc-查看issues">查看issues</a></li>
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+<h2 id="jira使用简介">JIRA使用简介</h2>
+<p>　　JIRA是Atlassian公司出品的项目与实务跟踪工具，被广泛应用于缺陷跟踪、客户实务、需求收集、流程审批、任务跟踪、项目跟踪和敏捷管理等工作领域。ServiceComb使用JIRA进行缺陷和任务跟踪，本文将简单介绍在ServiceComb的开发过程中如何使用JIRA。</p>
+
+<h2 id="注册并登陆到jira">注册并登陆到JIRA</h2>
+<p>　　在浏览器中打开<a href="https://issues.apache.org/jira/secure/Signup!default.jspa">JIRA注册页面</a>，填入个人邮箱，姓名等注册信息后即可注册。注册成功后登录并进入<a href="https://issues.apache.org/jira/projects/SCB/">ServiceComb项目</a></p>
+
+<h2 id="查看issues">查看issues</h2>
+<p>​	登录到JIRA后左侧面板依次是Kanban, Releases, Reports, Issues, Components. Kanban内容如下图，展示了当前需要完成的任务（73 To Do），正在解决中任务（3 In Progress）和已经解决的任务（79 Done），所有任务的编号都以SCB（ServiceComb的简写）开头，可以点击任务栏查看每个任务的详细信息。</p>
+
+<p><img src="/assets/images/kanban.png" alt="" class="align-center" /></p>
+
+<p>​	点击左侧面板中Issues可以看到所有的任务并支持自定义过滤规则进行筛选查看，点击右上角View all issues and filters即可进行过滤，默认过滤规则包括任务类型、任务进度、负责人、当前状态等，也可以使用Advanced功能进行高级过滤筛选。</p>
+
+<p><img src="/assets/images/filter.png" alt="" class="align-center" /></p>
+
+<h2 id="新建issue">新建issue</h2>
+
+<p>​	点击Create可以新建一个issue，创建的时候需要选择issue类型，包括Task, Bug, Feature, Improvement等，选择类型后在Summary中简单描述一下issue内容，需要详细说明的可以在Description中填写更多内容，需要注意的是ServiceComb包含四个子项目，分别是Java Chassis, Saga, Service-Center和website，所以创建issue的时候要选择具体对应的Component来指定issue属于哪个子项目。</p>
+
+<p><img src="/assets/images/issue.png" alt="" class="align-center" /></p>
+
+<p>​	创建好issue后可以将issue指定给自己，启动任务Start Progress，待问题解决后Resolve Issue或Close Issue即可，如下图：</p>
+
+<p><img src="/assets/images/progress.png" alt="" class="align-center" /></p>
+
+<p>​	通过提交代码解决该issue的时候需要在创建的PR的title上以issue的SCB编号开头，如下图中[SCB-327]</p>
+
+<p><img src="/assets/images/pr.png" alt="" class="align-center" /></p>
+
+<p>​	JIRA更多使用方法请参考<a href="https://confluence.atlassian.com/jiracoreserver076/getting-started-as-a-user-945112029.html">官方文档</a>。</p>
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content/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/index.html

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+    <meta itemprop="datePublished" content="October 29, 2018">
+    <meta itemprop="dateModified" content="October 29, 2018">
+
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Apache软件基金会（ASF）的三位Apache专家与ServiceComb Team在上海世博会会展中心举办了Apache Service ServiceComb会议。。此次会议，八位发言者提出了六个主题，分别是关于Apache Way的解释、Apache ServiceComb的路线图、ServiceMesh的探索分享、快速微服务编程的实践经验等。约50人参加了现场会议，600人在线观看。会中以讨论互动的形式进行，开放的、积极的气氛贯穿整个会议。</p>
+
+<p><strong>《Apache之道》</strong></p>
+
+<p><a href="/assets/slides/20181012/EN/1_The_Apache_Way.pdf">PDF下载</a></p>
+
+<p><strong>Roman Shaposhnik, Justin Mclean, Craig Russell：</strong> Apache软件基金会是全球最大的开源基金会，目前拥有300多个开源项目，涵盖大数据、云计算、服务器和Web框架、构建管理、内容管理、物联网等众多领域。三位来自Apache基金会的专家将详细介绍Apache基金会发展历程及现状，阐述Apache基金会的运作方式，解读Apache软件基金会的核心理念—Apache Way。同时分析作为一个Apache项目需要遵守的合规性规则及背后所蕴含的意义。并介绍Apache基金会孵化器的概况及项目流程，讨论Apache孵化项目如何发展社区并毕业成为顶级项目。</p>
+
+<p><img src="/assets/images/hc2018/1.jpeg" alt="1" /></p>
+
+<hr />
+
+<p><strong>《Apache ServiceComb(incubating)社区最新路线》</strong></p>
+
+<p><a href="/assets/slides/20181012/2_ApacheServiceComb(Incubating)Community_Roadmap.pdf">中文PDF下载</a>  <a href="/assets/slides/20181012/EN/2_ApacheServiceComb(Incubating)Community_Roadmap.pdf">英文PDF下载</a></p>
+
+<p><strong>姜宁：</strong> 介绍ServiceComb社区自1.0.0版本发布之后的整体技术演进路线和项目在Apache软件基金会的最新成长状态。</p>
+
+<p><img src="/assets/images/hc2018/2.jpeg" alt="2" /></p>
+
+<hr />
+
+<p><strong>《ServiceComb在Service Mesh的探索与思考》</strong></p>
+
+<p><a href="/assets/slides/20181012/4_ServiceComb’s_Exploration_of_Service_Mesh.pdf">中文PDF下载</a>  <a href="/assets/slides/20181012/EN/4_ServiceComb’s_Exploration_of_Service_Mesh.pdf">英文PDF下载</a></p>
+
+<p><strong>田晓亮：</strong> 介绍ServiceComb在生态兼容Service Mesh方面的工作，阐述ServiceComb在支持零侵入微服务化方面以及和传统微服务框架实现方式的协同部署、治理的探索。</p>
+
+<p><img src="/assets/images/hc2018/4.jpeg" alt="4" /></p>
+
+<hr />
+
+<p><strong>《Service Mesh微服务化和传统框架微服务化混合部署协同实践分享》</strong></p>
+
+<p><a href="/assets/slides/20181012/3_ServiceMesh-based_Microservices_and_Those_Based_on_a_Traditional_Architecture.pdf">中文PDF下载</a>  <a href="/assets/slides/20181012/EN/3_ServiceMesh-based_Microservices_and_Those_Based_on_a_Traditional_Architecture.pdf">英文PDF下载</a></p>
+
+<p><strong>苗彦杰：</strong> 在以Service Mesh为代表的零侵入微服务化发展过程中，如何与传统侵入式框架开发的微服务混合部署、协同治理成为了一道难题。演讲者将从自身的业务背景出发，介绍如何借助ServiceComb和Mesher完成混合部署，分享其中遇到的问题和解决方法。</p>
+
+<p><img src="/assets/images/hc2018/3.jpeg" alt="3" /></p>
+
+<hr />
+
+<p><strong>《Apache Committer 成长经验分享》</strong></p>
+
+<p><a href="/assets/slides/20181012/5_My_Participation_in_ServiceComb.pdf">中文PDF下载</a>  <a href="/assets/slides/20181012/EN/5_My_Participation_in_ServiceComb.pdf">英文PDF下载</a></p>
+
+<p><strong>冯征：</strong> 作为ServiceComb的新晋PMC和Committer，讲述自己如何在ServiceComb项目中成长的历程，分享自身参与开源社区的经验和收获。</p>
+
+<p><img src="/assets/images/hc2018/5.jpeg" alt="5" /></p>
+
+<hr />
+
+<p><strong>《快速微服务化编程体验》</strong></p>
+
+<p><a href="/assets/slides/20181012/6_Experience_on_Fast_Microservice_Programming.pdf">中文PDF下载</a>  <a href="/assets/slides/20181012/EN/6_Experience_on_Fast_Microservice_Programming.pdf">英文PDF下载</a></p>
+
+<p><strong>巨震：</strong> 现场演示如何快速使用ServiceComb Java-chassis和Service Mesh技术Mesher进行微服务化应用编程，结合Kubernetes进行快速部署，并和与会者互动练习。</p>
+
+<p><img src="/assets/images/hc2018/6.jpeg" alt="6" /></p>
+
+<hr />
+
+<p><strong>关于Apache ServiceComb 项目</strong>：</p>
+
+<p>ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。</p>
+
+<p><strong>如您有更多问题关于Aapche ServiceComb，请您加入ServiecComb Gitter聊天室咨询：<a href="https://gitter.im/ServiceCombUsers/Lobby">ServiceComb Gitter 聊天室</a></strong></p>
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content/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai/index.html

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+    <meta itemprop="description" content="Apache ServiceComb (incubating) Meetup">
+    <meta itemprop="datePublished" content="September 28, 2018">
+    <meta itemprop="dateModified" content="September 27, 2018">
+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb (incubating) Meetup -上海 2018.10.12
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>全球最大的开源软件基金会 Apache的大咖们和ServiceComb社区管理委员会成员们齐聚一堂，将从多维度带来干货满满的精彩技术和实践分享</strong></p>
+
+<p><strong>Apache ServiceComb Meetup</strong></p>
+
+<p><strong>会议日期/时间</strong>：2018 年 10 月 12 日，星期五，13:30–16:50</p>
+
+<p><strong>会议地址</strong>：上海世博展览馆416-417会议厅</p>
+
+<p><strong>在线直播:</strong> <a href="http://www.itdks.com/eventlist/detail/2709">链接</a></p>
+
+<hr />
+
+<p><strong>关于Apache ServiceComb (incubating) 项目</strong>：</p>
+
+<p>ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。</p>
+
+<p>这是一个免费的开放日Meetup活动，由Apache ServiceComb (incubating)社区组织，华为云赞助主办，我们邀请到了来自商用企业、Apache、ServiceComb社区及华为的多位专家和工程师，与大家进行分享和探讨，详细议题如下：</p>
+
+<hr />
+<p><strong>《Apache之道》</strong></p>
+
+<p><strong>时间：</strong> 13:30-14:30</p>
+
+<p><strong>主讲人：</strong> Roman Shaposhnik，知名企业开源专家及数字转型顾问，曾在Linux基金会下项目的开源协作过程中起了重要作用。并曾在Pivotal负责大数据及应用管理平台领域的工作。Roman 在Pivotal的工作使他深入了解了容器技术、虚拟化以及unikernel架构。此外，Roman 是Apache基金会孵化器的活跃成员，指导了大量的Apache基金会项目并直接参与项目贡献。</p>
+
+<p><strong>主讲人：</strong> Justin Mclean，Apache项目管理委员会主席，Apache Member，20余年IT行业软件开发经历，擅长IoT, Web 应用开发，数据库设计，开源硬件领域。曾经在全球范围内超过50场会议中进行演讲。</p>
+
+<p><strong>主讲人：</strong> Craig Russell，Apache Member，Apache IPMC成员，专注于数据库API方向，Sun公司和Oracle公司Java和Javascript中ORM部分架构师。Craig从2005年开始参与Apache基金会的事务，从2010年开始担任Apache Secretary及形象大使。</p>
+
+<p><strong>摘要：</strong> Apache软件基金会是全球最大的开源基金会，目前拥有300多个开源项目，涵盖大数据、云计算、服务器和Web框架、构建管理、内容管理、物联网等众多领域。三位来自Apache基金会的专家将详细介绍Apache基金会发展历程及现状，阐述Apache基金会的运作方式，解读Apache软件基金会的核心理念—Apache Way。同时分析作为一个Apache项目需要遵守的合规性规则及背后所蕴含的意义。并介绍Apache基金会孵化器的概况及项目流程，讨论Apache孵化项目如何发展社区并毕业成为顶级项目。</p>
+
+<hr />
+<p><strong>《Apache ServiceComb(incubating)社区最新路线》</strong></p>
+
+<p><strong>时间：</strong> 14:40-15:00</p>
+
+<p><strong>主讲人：</strong> 姜宁，Apache Member，华为微服务领域专家，开源专家，前红帽软件首席软件工程师，有十五年企业级开源中间件开发经验。2006年起一直从事Apache开源中间件项目工作，先后参与Apache CXF， Apache Camel，以及Apache ServiceComb等项目。对微服务架构，WebServices，Enterprise Integration Pattern，SOA， OSGi有比较深入的研究。</p>
+
+<p><strong>摘要：</strong> 介绍ServiceComb社区自1.0.0版本发布之后的整体技术演进路线和项目在Apache软件基金会的最新成长状态。</p>
+
+<hr />
+<p><strong>《ServiceComb在Service Mesh的探索与思考》</strong></p>
+
+<p><strong>时间：</strong> 15:00-15:20</p>
+
+<p><strong>主讲人：</strong> 田晓亮，华为云微服务架构师，同时是服务网格的技术带头人。前三星Svoice监控平台架构师，为Svoice执行运维开发解决方案，在PaaS、运维开发和 APM拥有丰富的经验，多次在包括LC3和ArchSummit的开源大会上演讲。</p>
+
+<p><strong>摘要：</strong> 介绍ServiceComb在生态兼容Service Mesh方面的工作，阐述ServiceComb在支持零侵入微服务化方面以及和传统微服务框架实现方式的协同部署、治理的探索。</p>
+
+<hr />
+<p><strong>《Service Mesh微服务化和传统框架微服务化混合部署协同实践分享》</strong></p>
+
+<p><strong>时间：</strong> 15:20-15:40</p>
+
+<p><strong>主讲人：</strong> 苗彦杰 梅斯医学首席架构师，多年医疗行业云计算开发经验。</p>
+
+<p><strong>摘要：</strong> 在以Service Mesh为代表的零侵入微服务化发展过程中，如何与传统侵入式框架开发的微服务混合部署、协同治理成为了一道难题。演讲者将从自身的业务背景出发，介绍如何借助ServiceComb和Mesher完成混合部署，分享其中遇到的问题和解决方法。</p>
+
+<hr />
+<p><strong>《Apache Committer 成长经验分享》</strong></p>
+
+<p><strong>时间：</strong> 15:50-16:10</p>
+
+<p><strong>主讲人：</strong> 冯征，软件工程师，2009年加入红帽软件公司。主要从事事务管理器方面的工作，Narayan和Blacktie项目的核心开发人员。从2017年开始参与了Apache ServiceComb有关分布式事务部分的实现，利用Byteman等工具完善了异常和超时测试场景。对于分布式事务处理以及微服务环境中的事务处理，有过深入的研究。</p>
+
+<p><strong>摘要：</strong> 作为ServiceComb的新晋PMC和Committer，讲述自己如何在ServiceComb项目中成长的历程，分享自身参与开源社区的经验和收获。</p>
+
+<hr />
+<p><strong>《快速微服务化编程体验》</strong></p>
+
+<p><strong>时间：</strong> 16:10-16:50</p>
+
+<p><strong>主讲人：</strong> 巨震，华为软件工程师，Go语言开发者，聚焦云计算、容器技术和DevOps。华为云公有云容器镜像服务核心开发者，当前主要从事华为开源项目开发。《第一本Docker书》的合作译者。热衷于自动化运维、微服务、Service Mesh等技术，曾在Container Days 2017， KubeCon 2017发表演讲。</p>
+
+<p><strong>摘要：</strong> 现场演示如何快速使用ServiceComb Java-chassis和Service Mesh技术Mesher进行微服务化应用编程，结合Kubernetes进行快速部署，并和与会者互动练习。</p>
+
+<hr />
+<p><strong>如您需要在参加Meetup之余参观ServiceComb展台，请您加入ServiecComb Gitter聊天室咨询：</strong>   <br />
+<strong><a href="https://gitter.im/ServiceCombUsers/Lobby">ServiceComb Gitter 聊天室</a></strong></p>
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+        <p>北京时间2019年6月24日，Apache ServiceComb社区在中国上海世博中心举办的开源业界最负盛名的 KubeCon+CloudNativeCon+Open Source Summit 云原生会议组织了微服务同场活动 Apache ServiceComb Meetup，并圆满落下帷幕。</p>
+
+<p>本次活动邀请了Apache Member、Apache Committer、华为云云服务首席工程师、京东数科专家、全球Top10 IT服务提供商开发经理等各行业的资深从业者，携手为大家分享了Apache社区开发经验、企业级PaaS应对复杂网络拓补的案例、汽车品牌数字化营销系统微服务化实践、高性能服务间通信的优化技巧等诸多微服务技术及经验，ServiceComb社区也重磅发布了一系列解决用户应用微服务化痛点的创新新品。</p>
+
+<p>在企业向数字化和云化转型过程中，微服务是不二选择，然而它并不是银弹，企业在微服务化过程中会遇到诸多挑战，ServiceComb将继续紧密围绕社区用户和开发者，携手解决微服务痛点问题。</p>
+
+<p>秉承“将复杂留给自己，极简留给用户，提供一站式的微服务开源解决方案，致力于帮助企业、用户和开发者将应用轻松微服务化上云，实现对微服务应用的高效运维管理” 的发展理念，社区发起召集令，动员有志者加入社区，一起做点有意思的事情。</p>
+
+<p><img src="/assets/images/Community_Summoned_zh.png" alt="1" /></p>
+
+<hr />
+<p><strong>全场视频回顾:</strong> <a href="https://huaweicloud.bugu.mudu.tv/watch/ym1vkamp">链接</a></p>
+
+<hr />
+<p><strong>《ServiceComb开源这两年》</strong>  <a href="/assets/slides/20190624/1_ServiceComb_Opensource_Way.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>姜宁</strong>，Apache软件基金会会员，华为开源能力中心技术专家，前红帽软件首席软件工程师，有十五年企业级开源中间件开发经验，有丰富的Java开发和使用经验，函数式编程爱好者。从2006年开始一直从事Apache开源中间件项目的开发工作，先后参与Apache CXF， Apache Camel，Apache ServiceMix以及Apache ServiceComb的开发。</p>
+
+<p><strong>摘要：</strong> ServiceComb正式开源已经两年了，在这两年中我们经历了代码首发时的激动，由0到1拓展社区的困惑，以及结识到结伴同行的小伙伴的快乐， 如今ServiceComb已经成长为Apache软件基金会顶级项目。本次演讲将总结回顾ServiceComb开源这两年的感悟与收获，希望能够帮助大家了解开源，参与开源，共创美好未来。</p>
+
+<hr />
+<p><strong>《汽车品牌的数字化营销系统微服务实践》</strong>  <a href="/assets/slides/20190624/2_NTTDATA_Microservice_Practices.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>朱小卫</strong>，NTTDATA中国上海分公司Digital Marketing开发经理，15年+研发经验，丰富的电商、CRM等产品服务实践经验，近三年专注于汽车整车的数字化转型解决方案。</p>
+
+<p><strong>摘要：</strong> NTTDATA是全球Top10内的IT服务提供商，为汽车、制造、航空、零售、服装等行业提供全渠道整合跨渠道协同、个性化营销及服务、消费者洞察大数据分析等数字化营销解决方案，本主题主要分享NTTDATA向微服务化转型，打造集中化、标准化、智能化、便利化的汽车品牌数字营销平台，帮助企业灵活应对市场需求，支持数字营销快速、多样、变化的业务场景的实践。</p>
+
+<hr />
+<p><strong>《企业级PaaS中的微服务应用揭秘》</strong>  <a href="/assets/slides/20190624/3_Enterprise_PaaS_Microservice_Pratices.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>田晓亮</strong>，10年软件行业经验，现任华为公有云服务ServiceStage首席工程师。2012年进入云计算领域，对PaaS， DevOps，APM等有深入的研究和实践经验。负责公司微服务框架的设计，开发和落地，微服务引擎云服务商用上线公有云。</p>
+
+<p><strong>摘要：</strong> 我们在公有云交付PaaS平台，帮助用户管理应用，通过流水线进行持续交付，管领应用的全生命周期，当应用系统的网络拓扑变得不断复杂后，需要引入微服务架构模式，来解决分布式系统的复杂性，本主题将讲述PaaS平台如何使用ServiceComb帮助用户完成微服务转型。</p>
+
+<hr />
+<p><strong>《微服务创新新品发布》</strong>  <a href="/assets/slides/20190624/4_Innovation_New_Project_Release.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>马彬</strong>，ServiceComb 社区成员，华为开源软件能力中心架构师，企业应用微服务化工程师，13+年电信级中间件平台、虚拟化、嵌入式操作系统与开源软件设计开发经验。</p>
+
+<p><strong>摘要：</strong> ServiceComb在Aapche毕业已经约半年时间，在这半年里面，社区并未冒进地去迸发新的项目或特性，而是选择了认真听取用户的意见。如今，ServiceComb社区确定了系列解决用户微服务化过程中痛点的方向，并且开始在社区里面继续创新孵化。本主题将和大家分享这些获取到的痛点和孵化项目，期望与用户/开发者一起思考如何一起去摆平微服务中的难题。</p>
+
+<hr />
+<p><strong>《解密ShardingSphere与ServiceComb联合打造的分布式事务解决方案》</strong>  <a href="/assets/slides/20190624/5_ShardingSphere_Distributed_Transaction_Solution.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>潘娟</strong>，京东数科高级DBA，主要负责京东数科数据库中间件开发、数据库运维自动化平台开发、生产数据库运维工作。多次参与京东6.18、11.11等大促活动的护航工作。曾负责京东数科数据库自动化平台设计与开发，现专注于Apache ShardingSphere分布式数据库中间件开发。乐于在数据库、自动化、分布式、中间件等相关领域进行学习和探索。</p>
+
+<p><strong>摘要：</strong> 业务层面的微服务架构大行其道，底层分布式数据库&amp;中间件如火如荼。在微服务场景下，各服务之间数据库相互独立，不能依靠单一数据库来实现跨服务的事务一致性；在分布式数据库集群状态下，又如何实现分布式事务呢？ShardingSphere作为首个Apache基金会的分布式数据库中间件项目与首个Apache微服务顶级项目ServiceComb强强联合，共同打造微服务与分布式数据库场景下的分布式事务解决方案。
+本次分享将围绕分布式事务，并以ShardingSphere与ServiceComb联合打造的分布式事务解决方案作为核心内容进行详细阐述和讲解。</p>
+
+<hr />
+<p><strong>《支持10万TPS的高性能服务间通信解读》</strong>  <a href="/assets/slides/20190624/6_Microservice_High_Performance_Communication.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>刘宝</strong>，Apache软件基金会 Commiter，拥有10年以上java开发框架的开发和运维经验。热爱微服务，并持续为它们开发一些常用的工具，比如进行中的servicecomb-fence项目。也喜欢分享开发和软件工程能力建设方面的一些心得，它们都发布在华为云博客和知乎专栏上面。</p>
+
+<p><strong>摘要：</strong> 200TPS的处理能力，已经能够满足很大一部分业务系统对于性能的要求。另外一方面，优化服务器间通信的性能的收益，很容易通过优化应用代码实现或者被应用代码状况抵消，还可以低成本的通过水平扩展处理能力等方式获得，因此开发者往往不重视通信能力的优化。本次演讲结合servicecomb-java-chassis的通信优化实践，说明性能优化的一些常见手段，并实践的视角，分享性能优化在系统可靠性、资源规划等其他不容易被开发者直接感知的方面的收益。</p>
+
+<hr />
+<p><strong>《华为云分布式事务云服务实践》</strong>  <a href="/assets/slides/20190624/7_HuaweiCloud_Distributed_Transaction_DTM_Practices.pdf">PDF下载</a></p>
+
+<p><strong>主讲人：</strong> <strong>王启军</strong>，华为云PaaS团队，负责java和go微服务框架。曾任当当网架构师，主导电商平台架构设计；曾就职于搜狐负责手机微博的研发。《持续演进的Cloud Native》作者，微信公众号“奔跑中的蜗牛”博主。</p>
+
+<p><strong>摘要：</strong> 微服务架构下，服务数量暴涨，一个服务可以完成的工作会被分发到多个服务，按照“服务自治”的原则，数据访问通过接口隔离，原本的单库事务变成了分布式事务，“当你开始考虑一致性问题的时候，才能说明你开始真正的了解微服务了”，本专题通过相关场景说明当你基于华为云构建微服务的时候，如何实现分布式事务？失败如何回退？超时如何处理？详细说明其背后的原理。</p>
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+	        ServiceComb提供了一套关于服务注册，服务发现，服务配置以及管理功能的微服务框架
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+    <meta itemprop="datePublished" content="September 20, 2019">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
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+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>北京时间2019年09月20日，Apache ServiceComb社区在中国上海世博中心举办的华为全链接大会组织了微服务同场活动 Apache ServiceComb Meetup，并圆满落下帷幕。</p>
+
+<p>本次活动邀请了Apache基金会主席、Apache孵化器项目管理委员会主席、Apache Member、Apache Committer、华为云PaaS团队架构师，携手为大家分享了Apache基金会介绍、Apache 孵化器的运作、ServiceComb的Apache孵化之路分享、Apache ServiceComb：微服务创新项目解读、华为云微服务工具解放开发者等诸多微服务技术及经验，ServiceComb社区也重磅发布了一系列解决用户应用微服务化痛点的创新新品。</p>
+
+<p><strong>Session 1: 《Apache软件基金会开源开发详解》</strong></p>
+
+<p>Apache软件基金会是全球最大的开源基金会，目前拥有300多个开源项目，涵盖大数据、云计算、服务器和Web框架、构建管理、内容管理、物联网等众多领域。基金会成员介绍了Apache软件基金会，开源社区治理原则，以及Apache孵化器的运作机制，并以华为捐赠的Apache ServiceComb孵化经历，分享Apache项目的孵化成功经验。</p>
+
+<p><a href="/assets/slides/20190920/The_Apache_Way_En.pdf">中文PDF下载</a>  <a href="/assets/slides/20190920/EN/The_Apache_Way_En.pdf">英文PDF下载</a></p>
+
+<p><img src="/assets/images/hc2019/apache.jpg" alt="1" /></p>
+
+<p><strong>《Apache基金会介绍》</strong></p>
+
+<p><strong>Craig Russell, Apache基金会主席：</strong> 详细的介绍的Apache基金会的历史和现状及核心原则。</p>
+
+<p><img src="/assets/images/hc2019/introduction.jpg" alt="1" /></p>
+
+<p><strong>Justin Mclean, Apache孵化器项目管理委员会主席：</strong> 详解了Apache孵化器的运作机制以及Apache协议的特点，Apache项目的发布流程。</p>
+
+<p><strong>《Apache 孵化器的运作》</strong></p>
+
+<p><img src="/assets/images/hc2019/process.jpg" alt="1" /></p>
+
+<p><strong>姜宁，华为开源软件部技术专家，Apache软件基金会会员：</strong> 分享了华为捐赠的Apache ServiceComb成功孵化的实战经验，并对如何更好的发展开源社区给出了自己的总结和建议。</p>
+
+<p><strong>《ServiceComb的Apache孵化之路》</strong></p>
+
+<p><img src="/assets/images/hc2019/incubation.jpg" alt="1" /></p>
+
+<hr />
+<p><strong>Session 2: 《庖丁解牛： 微服务创新实践解放开发者》</strong></p>
+
+<p>Apache ServiceComb社区认真的听取了用户实施微服务架构中遇到的痛点。本主题前半部分将和大家分享这些获取到的痛点和为解决部分痛点而孵化项目，期望与用户一起思考如何去摆平微服务化实践中的难题。本主题后半部分将介绍与用户携手实践出真知的微服务化工具创新实践。</p>
+
+<p><img src="/assets/images/hc2019/servicecomb.jpg" alt="1" /></p>
+
+<p><strong>《Apache ServiceComb：微服务创新项目解读》</strong></p>
+
+<p><a href="/assets/slides/20190920/Apache_ServiceComb-Innovative_Microservices.pdf">中文PDF下载</a>  <a href="/assets/slides/20190920/EN/Apache_ServiceComb-Innovative_Microservices.pdf">英文PDF下载</a></p>
+
+<p><strong>马彬，华为开源软件部架构师，Apache Committer：</strong> 解读ServiceComb社区针对用户痛点所推出的创新项目架构、roadmap及场景案例，包括:多语言运行环境、微服务契约工具、服务中心异构通信、分布式配置中心、微服务鉴权；同时向社区发出召集令，号召更多的兴趣爱好者投入开源社区贡献。</p>
+
+<p><img src="/assets/images/hc2019/innovative.jpg" alt="2" /></p>
+
+<hr />
+
+<p><strong>《华为云微服务工具解放开发者》</strong></p>
+
+<p><a href="/assets/slides/20190920/HUAWEI_CLOUD_Microservice_Tool_Improves_Development_Efficiency.pdf">中文PDF下载</a>  <a href="/assets/slides/20190920/EN/HUAWEI_CLOUD_Microservice_Tool_Improves_Development_Efficiency.pdf">英文PDF下载</a></p>
+
+<p><strong>王启军, 华为云PaaS团队架构师：</strong> 华为云微服务基于ServiceComb的实践，通过案例分享了微服务拆分工具，契约管理工具这2个开发者/用户关注度最高的微服务工具。</p>
+
+<p><img src="/assets/images/hc2019/efficiency.jpg" alt="4" /></p>
+
+<hr />
+
+<p><strong>关于Apache ServiceComb 项目</strong>：</p>
+
+<p>ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。</p>
+
+<hr />
+<p><strong>如您有更多问题关于Aapche ServiceComb，欢迎您扫码或微信添加“ServiceComb小助手”，我们将认真对待您的每一个问题</strong>
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+</a>
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+            <h1 class="page__title" itemprop="headline">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</h1>
+            
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+  少于 1 分钟 阅读
+
+</p>
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+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>《深度解读Apache软件基金会》</strong>
+<a href="/assets/slides/20180627/1_How_Apache_works_jb.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>Jean-Baptiste Onofré Apache Member，Talend的Fellow, 04年开始从事Apache软件基金会相关工作，Karaf、Camel、Carbondata等超过20个Apache项目的PMC member。</p>
+
+<p><strong>摘要：</strong>深度解读全球最大的开源软件基金会Apache，诠释什么是Apache Way，及Apache的吸引开源项目之处，结合实际项目讲述从开源到孵化再到毕业的全过程，介绍当前ServiceComb的Apache孵化状态。</p>
+
+<p><strong>《ServiceComb社区概况与Roadmap》</strong>
+<a href="/assets/slides/20180627/2_ServiceComb-introduction-jiangning.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>姜宁 Apache Member，华为开源能力中心技术专家</p>
+
+<p><strong>摘要：</strong>介绍 Apache ServiceComb (incubating) 社区的理念，当前概况，技术走向与社区活动。</p>
+
+<p><strong>《软通动力基于ServiceComb的智能城市微服务改造历程》</strong>
+<a href="/assets/slides/20180627/3_How_Smart_City_Microserviced_Based_on_ServiceComb_from_iSoftStone.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>鲍永伟 软通动力智慧城市业务副总裁，聚焦于云计算与大数据相关的创新技术在智慧城市的应用。</p>
+
+<p><strong>摘要：</strong>软通动力智慧城市业务涉及系统繁多并交互复杂，在进行微服务化时面临微服务粒度设计不合理、代码重复率高、大型应用微服务部署困难等阵痛，本分享介绍软通动力如何使用ServiceComb，特别是ServiceComb的Swagger API，解决阵痛的微服务化历程，使能烟囱系统互通、系统松耦合，以应对智慧城市的微服务多样性挑战。</p>
+
+<p><strong>《ServiceComb Java SDK和注册中心详解》</strong>
+<a href="/assets/slides/20180627/4_Java_sdk_details_wujimin.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>吴继敏 Apache ServiceComb (incubating) PPMC，ServiceComb商业版本 华为云微服务引擎 原作者</p>
+
+<p><strong>摘要：</strong>介绍 ServiceComb Java Chassis、Service Center的设计细节和特性。</p>
+
+<p><strong>《ServiceComb在华为消费者云的亿级用户微服务实践》</strong>
+ <a href="/assets/slides/20180627/5_Millions_Users_Solution_Based_on_ServiceComb_Microservices_from_Huawei_Consumer_Cloud_lilinfeng.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>李林锋 华为消费者云应用市场微服务架构师，多年平台中间件、云平台、微服务框架设计和开发经验。工作之余爱好技术写作，《Netty权威指南》和《分布式服务框架原理与实践》作者</p>
+
+<p><strong>摘要：</strong>华为消费者云服务为全球100多个国家数亿华为终端用户提供精品云服务，为了支撑业务的快速发展，需要通过微服务架构驱动价值需求更敏捷和高效的交付。利用ServiceComb对SpringMVC、透明RPC开发模式的支持，业务已有的代码可以低成本的迁移到新的微服务架构，同时利用ServiceComb对Reactive异步编程模型的支持，业务实现了全栈异步化改造，相比于传统的同步阻塞式服务调用，性能提升数倍，但是资源损耗却大幅降低…更多实践案例，尽在ServiceComb在华为消费者云的亿级用户实践分享中。</p>
+
+<p><strong>《微服务的领域驱动设计》</strong>
+<a href="/assets/slides/20180627/6_DDD_in_Microservics_wanglei.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong> 王磊 微服务国内先驱，《微服务架构与实践》作者，华为微服务专家，前ThoughtWorks首席咨询师。</p>
+
+<p><strong>摘要：</strong>微服务作为新时代架构方式被业界广泛采纳，也顺理成章成为DDD领域驱动设计的理念的落地工具。本议题分享DDD领域驱动设计理念是如何与微服务友好结合和实践的。</p>
+
+<p><strong>《ServiceComb 事务一致性解决方案详解》</strong>
+<a href="/assets/slides/20180627/7_Detailed_Introduction_of_Transaction_Consistency_Solution_from_ServiceComb-Saga.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>姜宁 Apache Member，华为开源能力中心技术专家</p>
+
+<p><strong>摘要：</strong>分享ServiceComb的分布式事务Saga解决方案与实践</p>
+
+<p><strong>《ServiceComb的ServiceMesh思考》</strong>
+<a href="/assets/slides/20180627/8_Thinking_about_ServiceMesh_in_ServiceComb.pdf">点击下载</a></p>
+
+<p><strong>主讲人：</strong>田晓亮 华为云 Service Mesh 架构师</p>
+
+<p><strong>摘要：</strong>分享ServiceComb对于服务网格Service Mesh的最新思考，以及ServiceMesh在华为云的实践。</p>
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+    <meta itemprop="headline" content="微服务 Meetup：Apache ServiceComb (incubating) Day 详细议程">
+    <meta itemprop="description" content="Detailed Agenda of Apache ServiceComb (incubating) Day">
+    <meta itemprop="datePublished" content="June 14, 2018">
+    <meta itemprop="dateModified" content="June 14, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">微服务 Meetup：Apache ServiceComb (incubating) Day 详细议程
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>微服务开源 ServiceComb Apache基金会孵化项目将于6月27日（星期三）上午11点00分至下午17点30分在国家会议中心举办为期一天的开放日Meetup活动。</strong></p>
+
+<p>本次开放日将主要聚焦在以下几个方面，和企业、用户及开发者一同探讨微服务技术及方向。</p>
+
+<ul>
+  <li>
+    <p>Apache 社区解读</p>
+  </li>
+  <li>
+    <p>企业微服务商用案例实践分享</p>
+  </li>
+  <li>
+    <p>ServiceComb的社区概况和技术分享</p>
+  </li>
+  <li>
+    <p>微服务领域驱动设计方法</p>
+  </li>
+</ul>
+
+<p><strong>会议日期/时间</strong>：2018 年 6 月 27 日，星期三，9:30 – 17:30</p>
+
+<p><strong>会议地址</strong>：中国国家会议中心，北京, <strong>Room 211</strong></p>
+
+<p><strong>会议费用</strong>： 免费</p>
+
+<p><strong>参加方式： 可直接免费到场参加Meetup，使用电梯抵达二楼211房间</strong>。</p>
+
+<hr />
+
+<p><strong>关于Apache ServiceComb (incubating) 项目</strong>：</p>
+
+<p>ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。</p>
+
+<p>这是一个免费的开放日Meetup活动，由Apache ServiceComb (incubating)社区组织，华为云赞助主办，我们邀请到了来自商用企业、Apache、ServiceComb社区及华为的多位专家和工程师，与大家进行分享和探讨，详细议题如下：</p>
+
+<hr />
+<p><strong>《深度解读Apache软件基金会》</strong></p>
+
+<p><strong>时间：</strong>11:00-12:00</p>
+
+<p><strong>主讲人：</strong>Jean-Baptiste Onofré   Apache Member，Talend的Fellow, 04年开始从事Apache软件基金会相关工作，Karaf、Camel、Carbondata等超过20个Apache项目的PMC member。</p>
+
+<p><strong>摘要：</strong>深度解读全球最大的开源软件基金会Apache，诠释什么是Apache Way，及Apache的吸引开源项目之处，结合实际项目讲述从开源到孵化再到毕业的全过程，介绍当前ServiceComb的Apache孵化状态。</p>
+
+<hr />
+<p><strong>《ServiceComb社区概况与Roadmap 》</strong></p>
+
+<p><strong>时间：</strong>13:30-13:45</p>
+
+<p><strong>讲师：</strong>姜宁 Apache Member，华为开源能力中心技术专家</p>
+
+<p><strong>摘要：</strong>介绍 Apache ServiceComb (incubating) 社区的理念，当前概况，技术走向与社区活动。</p>
+
+<hr />
+<p><strong>《软通动力基于ServiceComb的智能城市微服务改造历程》</strong></p>
+
+<p><strong>时间：</strong> 13:30-13:45</p>
+
+<p><strong>主讲人：</strong>鲍永伟 软通动力智慧城市业务副总裁，聚焦于云计算与大数据相关的创新技术在智慧城市的应用。</p>
+
+<p><strong>摘要：</strong>软通动力智慧城市业务涉及系统繁多并交互复杂，在进行微服务化时面临微服务粒度设计不合理、代码重复率高、大型应用微服务部署困难等阵痛，本分享介绍软通动力如何使用ServiceComb，特别是ServiceComb的Swagger API，解决阵痛的微服务化历程，使能烟囱系统互通、系统松耦合，以应对智慧城市的微服务多样性挑战。</p>
+
+<hr />
+<p><strong>《ServiceComb Java SDK和注册中心详解 》</strong></p>
+
+<p><strong>时间：</strong> 14:15-14:45</p>
+
+<p><strong>主讲人：</strong>吴继敏  Apache ServiceComb (incubating) PPMC，ServiceComb商业版本 华为云微服务引擎 原作者</p>
+
+<p><strong>摘要：</strong>介绍 ServiceComb Java Chassis、Service Center的设计细节和特性。</p>
+
+<hr />
+<p><strong>《ServiceComb在华为消费者云的亿级用户微服务实践》</strong></p>
+
+<p><strong>时间：</strong>14:45-15:15</p>
+
+<p><strong>主讲人：</strong>李林锋     华为消费者云应用市场微服务架构师，多年平台中间件、云平台、微服务框架设计和开发经验。工作之余爱好技术写作，《Netty权威指南》和《分布式服务框架原理与实践》作者</p>
+
+<p><strong>摘要：</strong> 华为消费者云服务为全球100多个国家数亿华为终端用户提供精品云服务，为了支撑业务的快速发展，需要通过微服务架构驱动价值需求更敏捷和高效的交付。利用ServiceComb对SpringMVC、透明RPC开发模式的支持，业务已有的代码可以低成本的迁移到新的微服务架构，同时利用ServiceComb对Reactive异步编程模型的支持，业务实现了全栈异步化改造，相比于传统的同步阻塞式服务调用，性能提升数倍，但是资源损耗却大幅降低…更多实践案例，尽在ServiceComb在华为消费者云的亿级用户实践分享中。</p>
+
+<hr />
+<p><strong>《微服务的领域驱动设计》</strong></p>
+
+<p><strong>时间：</strong> 15:25-15:55</p>
+
+<p><strong>主讲人：</strong> 王磊    微服务国内先驱，《微服务架构与实践》作者，华为微服务专家，前ThoughtWorks首席咨询师。</p>
+
+<p><strong>摘要：</strong>微服务作为新时代架构方式被业界广泛采纳，也顺理成章成为DDD领域驱动设计的理念的落地工具。本议题分享DDD领域驱动设计理念是如何与微服务友好结合和实践的。</p>
+
+<hr />
+<p><strong>《ServiceComb 事务一致性解决方案详解 》</strong></p>
+
+<p><strong>时间：</strong> 15:55-16:25</p>
+
+<p><strong>主讲人：</strong>姜宁 Apache Member，华为开源能力中心技术专家</p>
+
+<p><strong>摘要：</strong>分享ServiceComb的分布式事务Saga解决方案与实践</p>
+
+<hr />
+<p><strong>《ServiceComb的ServiceMesh思考 》</strong></p>
+
+<p><strong>时间：</strong>16:25-17:25</p>
+
+<p><strong>主讲人：</strong>田晓亮 华为云 Service Mesh 架构师</p>
+
+<p><strong>摘要：</strong>分享ServiceComb对于服务网格Service Mesh的最新思考，以及ServiceMesh在华为云的实践。</p>
+
+<hr />
+<p><strong>如您需要在参加workshop之余参观LC3展台，请您加入ServiecComb Gitter聊天室咨询：</strong>   <br />
+<strong><a href="https://gitter.im/ServiceCombUsers/Lobby">ServiceComb Gitter 聊天室</a></strong></p>
+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="微服务化后的按需精细化资源控制">
+    <meta itemprop="description" content="本篇将介绍使用kubernetes的弹性伸缩能力在微服务化的Company中实现按需精细化资源控制的实践">
+    <meta itemprop="datePublished" content="August 24, 2017">
+    
+
+    <div class="page__inner-wrap">
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+          <header>
+            <h1 class="page__title" itemprop="headline">微服务化后的按需精细化资源控制
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
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+      <section class="page__content" itemprop="text">
+        <p>　　<a href="/cn/docs/company-on-kubernetes/">上文</a> 介绍了在K8S上快速部署Company示例，本文将继续在K8S上演示使用K8S的弹性伸缩能力进行Company示例的按需精细化资源控制，以此体验微服务化给大家带来的好处。</p>
+
+<h2 id="环境准备">环境准备</h2>
+
+<h5 id="k8s环境准备">K8S环境准备：</h5>
+
+<p>　　为使K8S具备弹性伸缩能力，需要先在K8S中安装监控器Heapster和Grafana：</p>
+
+<p>　　具体读者踩了坑后更新的heapster的安装脚本作者放在：<a href="https://github.com/zenlinTechnofreak/LinuxCon-Beijing-WorkShop/tree/autoscal/kubernetes/heapster/deploy">heapster</a>，可直接获取下载获取，需要调整一个参数，后直接运行kube.sh脚本进行安装。</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>vi LinuxCon-Beijing-WorkShop/kubernetes/heapster/deploy/kube-config/influxdb/heapster.yaml
+</code></pre></div></div>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spec</span><span class="pi">:</span>
+  <span class="na">replicas</span><span class="pi">:</span> <span class="m">1</span>
+  <span class="na">template</span><span class="pi">:</span>
+    <span class="na">metadata</span><span class="pi">:</span>
+      <span class="na">labels</span><span class="pi">:</span>
+        <span class="na">task</span><span class="pi">:</span> <span class="s">monitoring</span>
+        <span class="na">k8s-app</span><span class="pi">:</span> <span class="s">heapster</span>
+    <span class="na">spec</span><span class="pi">:</span>
+      <span class="na">serviceAccountName</span><span class="pi">:</span> <span class="s">heapster</span>
+      <span class="na">containers</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">heapster</span>
+        <span class="na">image</span><span class="pi">:</span> <span class="s">gcr.io/google_containers/heapster-amd64:v1.4.1</span>
+        <span class="na">imagePullPolicy</span><span class="pi">:</span> <span class="s">IfNotPresent</span>
+        <span class="na">command</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="s">/heapster</span>
+<span class="c1">#集群内安装直接使用kubernetes</span>
+        <span class="pi">-</span> <span class="s">--source=kubernetes</span>
+<span class="c1">#集群外安装请直接将下面的服务地址替换为k8s api server地址</span>
+<span class="c1">#        - --source=kubernetes:http://10.229.43.65:6443?inClusterConfig=false</span>
+         <span class="pi">-</span> <span class="s">--sink=influxdb:http://monitoring-influxdb:8086</span>
+</code></pre></div></div>
+
+<h5 id="启动company">启动Company：</h5>
+
+<p>　　下载Comany支持弹性伸缩的代码：</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git
+
+<span class="nb">cd </span>LinuxCon-Beijing-WorkShop/kubernetes/
+
+bash start-autoscale.sh 
+</code></pre></div></div>
+
+<p>　　在Company的deployment.yaml中， 增加了如下限定资源的字段，这将限制每个pod被限制在200mill-core(1000毫core == 1 core)的cpu使用率以内。</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="na">resources</span><span class="pi">:</span>
+      <span class="na">limits</span><span class="pi">:</span>
+        <span class="na">cpu</span><span class="pi">:</span> <span class="s">200m</span>
+</code></pre></div></div>
+<p>　　在 start-autoscale.sh 中，对每个deployment创建HPA(pod水平弹性伸缩器)资源，限定每个pod的副本数弹性伸缩时控制在1到10之间，并限定每个pod的cpu占用率小于50%，结合前面限定了200mcore，故，每个pod的的平均cpu占用率会被HPA通过弹性伸缩能力控制在100mcore以内。</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># Create Horizontal Pod Autoscaler</span>
+kubectl autoscale deployment zipkin <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-bulletin-board <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-worker <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-doorman <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-manager <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-beekeeper <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+</code></pre></div></div>
+
+<p>　　当运行start-autoscale.sh之后，具备弹性伸缩器的company已经被创建，可通过下面指令进行HPA的查询：</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code> kubectl get hpa
+</code></pre></div></div>
+
+<h5 id="启动压测">启动压测：</h5>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">export</span> <span class="nv">$HOST</span><span class="o">=</span>&lt;heapster-ip&gt;:&lt;heapster-port&gt;
+bash LinuxCon-Beijing-WorkShop/kubernetes/stress-test.sh
+</code></pre></div></div>
+
+<p>　　该脚本不断循环执行 1s内向Company请求计算 fibonacci 数值200次，对Company造成请求压力：</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">FIBONA_NUM</span><span class="o">=</span><span class="sb">`</span>curl <span class="nt">-s</span> <span class="nt">-H</span> <span class="s2">"Authorization: </span><span class="nv">$Authorization</span><span class="s2">"</span> <span class="nt">-XGET</span> <span class="s2">"http://</span><span class="nv">$HOST</span><span class="s2">/worker/fibonacci/term?n=6"</span><span class="sb">`</span>
+</code></pre></div></div>
+
+<h2 id="测试过程与结果">测试过程与结果</h2>
+
+<p>　　分别查看HPA状态以及Grafana，如下：</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-1.png" alt="图1" class="align-center" />
+图1 启动阶段</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-2.png" alt="图2" class="align-center" />
+图2 启动阶段</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-3.png" alt="图3" class="align-center" />
+图3 过程</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-4.png" alt="图4" class="align-center" />
+图4 结果</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-5.png" alt="图5" class="align-center" />
+图5 结果</p>
+
+<p>　　从以上过程可以分析出，以下几点：</p>
+
+<p>　　1. 压力主要集中在company-manager这个pod上，K8S的autoscaler通过弹性增加该pod的副本数量，最终达到目标：每个pod的cpu占用率低于限定值的50%（图5，Usage default company-manager/Request default company-manager = 192/600 约等于图4中的33%），并保持稳定。</p>
+
+<p>　　2. 在弹性伸缩过程中，在还没稳定前可能造成丢包，如图3。</p>
+
+<p>　　3. Company启动会导致系统资源负载暂时性加大，故Grafana上看到的cpu占用率曲线会呈现波峰状，但随着系统稳定运行后，HPA会按照系统的稳定资源消耗准确找到匹配的副本数。图3中副本数已超过实际所需3个，但随着系统稳定，最终还是稳定维持在3个副本。</p>
+
+<p>　　4. 在HPA以及Grafana可以看到缩放和报告数据都会有延迟，按照官方文档说法，只有在最近3分钟内没有重新缩放的情况下，才会进行放大。 从最后一次重新缩放，缩小比例将等待5分钟。 而且，只有在avg/ Target降低到0.9以下或者增加到1.1以上（10％容差）的情况下，才可能会进行缩放。</p>
+
+<p>　　以上，就是本次对Compan示例弹性伸缩的全过程，<strong>Martin Fowler 在2014年3月的<a href="http://martinfowler.com/articles/microservices.html">文章</a>中提到:</strong></p>
+
+<blockquote>
+  <p>　　<strong>微服务是一种架构风格，一个大型复杂软件应用由一个或多个微服务组成。系统中的各个微服务可被独立部署，各个微服务之间是松耦合的。每个微服务仅关注于完成一件任务并很好地完成该任务。在所有情况下，每个任务代表着一个小的业务能力。</strong></p>
+</blockquote>
+
+<p>　　<strong>国内实践微服务的先行者王磊先生也在《微服务架构与实践》一书中进行了全面论述。</strong></p>
+
+<p>　　Company使用ServiceComb进行微服务化改造后，具备了微服务的属性，故可以对单个负载较大的company-manager这个微服务进行精细化的控制，达到按需的目的，相比传统单体架构来讲，这将大大帮助准确有效地化解应用瓶颈，提高资源的利用效率。</p>
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+    <meta itemprop="dateModified" content="April 13, 2018">
+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用gradle构建基于Java Chassis开发的微服务
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>maven和gradle都是Java世界中常用的构建工具。在<a href="https://github.com/apache/incubator-servicecomb-java-chassis">Java Chassis</a>项目中采用了maven作为其构建工具，并在maven中心仓库定期发布其最新稳定版。然而，鉴于gradle最新发布版(4.6.0)还不支持maven的统一版本管理(BOM)功能，则在使用gradle构建基于Java Chassis开发的微服务时，需要用到Spring的<a href="https://github.com/spring-gradle-plugins/dependency-management-plugin">依赖管理插件</a>来引入Java Chassis的版本管理来统一依赖项的版本从而避免产生版本冲突。</p>
+
+<p>在maven中，Java Chassis的依赖管理通过以下方式即可引入：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="nt">&lt;dependencyManagement&gt;</span>
+     <span class="nt">&lt;dependencies&gt;</span>
+       <span class="nt">&lt;dependency&gt;</span>
+         <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+         <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+         <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+         <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+         <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+       <span class="nt">&lt;/dependency&gt;</span>
+     <span class="nt">&lt;/dependencies&gt;</span>
+   <span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div></div>
+
+<p>在gradle中，则需要以下三步完成，具体可参考 ：<a href="https://github.com/apache/incubator-servicecomb-java-chassis/pull/640/files#diff-8d0fdb4970d74d053b6585c3d5ae4cc2R36">Java Chassis的PR-640</a>。</p>
+
+<ol>
+  <li>
+    <p>声明使用maven仓库及依赖管理插件的依赖</p>
+
+    <div class="language-gradle highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">buildscript</span> <span class="o">{</span>
+    <span class="k">repositories</span> <span class="o">{</span>
+        <span class="n">mavenLocal</span><span class="o">()</span>
+        <span class="n">mavenCentral</span><span class="o">()</span>
+    <span class="o">}</span>
+    <span class="k">dependencies</span> <span class="o">{</span>
+        <span class="n">classpath</span><span class="o">(</span><span class="s1">'io.spring.gradle:dependency-management-plugin:1.0.4.RELEASE'</span><span class="o">)</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>启用依赖管理插件</p>
+
+    <div class="language-gradle highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">apply</span> <span class="nl">plugin:</span> <span class="s1">'io.spring.dependency-management'</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>声明Java Chassis的统一依赖管理</p>
+
+    <div class="language-gradle highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">dependencyManagement</span> <span class="o">{</span>
+    <span class="n">imports</span> <span class="o">{</span>
+        <span class="n">mavenBom</span> <span class="s1">'org.apache.servicecomb:java-chassis-dependencies:1.0.0-m1'</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p><strong>注意：</strong> 在每个子模块中都需要进行上述三步配置。</p>
+
+<p>对统一版本管理配置完成后，可增加程序运行入口使得命令行下也能方便的通过gradle运行应用，以便快速验证。其中，可将应用分为Spring Boot应用和非Spring Boot应用来为其添加启动入口：</p>
+
+<ol>
+  <li>
+    <p>Spring Boot应用</p>
+
+    <ol>
+      <li>
+        <p>声明使用maven仓库及Spring Boot插件的依赖</p>
+
+        <div class="language-gradle highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">buildscript</span> <span class="o">{</span>
+    <span class="k">dependencies</span> <span class="o">{</span>
+        <span class="n">classpath</span><span class="o">(</span><span class="s2">"org.springframework.boot:spring-boot-gradle-plugin:1.4.5.RELEASE"</span><span class="o">)</span>
+    <span class="o">}</span>
+    <span class="k">repositories</span> <span class="o">{</span>
+        <span class="n">mavenLocal</span><span class="o">()</span>
+        <span class="n">mavenCentral</span><span class="o">()</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>        </div>
+      </li>
+      <li>
+        <p>启用Spring Boot插件</p>
+
+        <div class="language-gradle highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">apply</span> <span class="nl">plugin:</span> <span class="s1">'org.springframework.boot'</span>
+</code></pre></div>        </div>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>非Spring Boot应用</p>
+
+    <p>非Spring Boot应用只需要在<code class="highlighter-rouge">build.gradle</code>文件中使用<code class="highlighter-rouge">application</code>插件并指明应用入口方法即可：</p>
+
+    <div class="language-gradle highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">apply</span> <span class="nl">plugin:</span> <span class="s1">'application'</span>
+
+<span class="n">mainClassName</span> <span class="o">=</span> <span class="s1">'org.packageName.XXXMain'</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+        
+      </section>
+
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content/cn/docs/communication-btw-sc-ms/index.html

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+    <meta itemprop="headline" content="Communication Between Service-Center and MicroServices">
+    <meta itemprop="description" content="An introduction of how service-center and microservices work together">
+    <meta itemprop="datePublished" content="August 09, 2017">
+    <meta itemprop="dateModified" content="August 09, 2017">
+
+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Communication Between Service-Center and MicroServices
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  1 分钟 阅读
+
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+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Service-Center(<a href="https://github.com/apache/incubator-servicecomb-service-center">SC</a>) is a service registry that allows services to register their instance information and to discover providers of a given service.
+SC uses etcd to store all the information of micro-service and its instances. Below is the diagram stating the working principles and flow of SC.</p>
+
+<h4 id="on-startup">On StartUp</h4>
+<p>Here we assume that micro-services are written using <a href="https://github.com/apache/incubator-servicecomb-java-chassis">java-chassis</a> sdk. So when micro-service boots up then java-chassis sdk does the following list of tasks.</p>
+
+<ol>
+  <li>
+    <p>On startup provider registers the micro-service to SC if not registered earlier and also register its instance information like its Ip and Port on which instance is running.</p>
+  </li>
+  <li>
+    <p>SC stores the provider information in etcd.</p>
+  </li>
+  <li>
+    <p>On startup consumer retrieves the list of all provider instance from SC using the micro-service name of the provider.</p>
+  </li>
+  <li>
+    <p>Consumer sdk stores all the information of provider instances in its cache.</p>
+  </li>
+  <li>
+    <p>Consumer sdk creates a web socket connection to SC to watch all the provider instance information, if there is any change in the provider then sdk updates it’s cache information.</p>
+  </li>
+</ol>
+
+<p><img src="/assets/images/onStartup.PNG" alt="OnStartup" class="align-center" /></p>
+
+<h4 id="communication-between-consumer---provider">Communication between Consumer -&gt; Provider</h4>
+<p>Once the bootup is successful then the consumer can communicate with providers flawlessly, below is the diagram illustrating the communication between provider and consumer.</p>
+
+<p><img src="/assets/images/communication.PNG" alt="Communication" class="align-center" /></p>
+
+<p>Provider instance regularly sends heartbeat signal every 30 seconds to SC, if SC does not recieve the heartbeat for particular instance then the information in etcd expires and the provider instance information is removed.<br />
+Consumer watches the information of provider instances from SC and if there is any change then the cache is updated.<br />
+When Consumer needs to communicate to Provider then consumer reads endpoints of the provider instances from cache and do loadbalancing to communicate to Provider.</p>
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+    <meta itemprop="headline" content="在kubernetes上一键式部署company">
+    <meta itemprop="description" content="本篇将介绍在kubernetes集群中一键式部署基于ServiceComb开发的company示例">
+    <meta itemprop="datePublished" content="August 21, 2017">
+    
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">在kubernetes上一键式部署company
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>　　<a href="/cn/docs/linuxcon-workshop-demo/">Linux Con Workshop Demo</a> 博文介绍了如何使用微服务开源开发框架ServiceComb快速开发company示例，将典型的企业级应用company示例进行快速微服务化。</p>
+
+<p>　　现在，<a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git">github</a>上已经提供了在kubernetes集群上一键式部署的功能。本文将着重讲解相应的yaml文件和服务间通信，这对于开发者基于Company 模型进行微服务开发并且部署到云上将会有所帮助。</p>
+
+<h2 id="一键部署">一键部署</h2>
+
+<p>　　<a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop/blob/master/kubernetes/README.md">Run Company on Kubernetes Cluster</a> 提供了详细的使用方法，读者只需通过以下3条指令，就可将company在kubernetes集群上部署起来，</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git
+
+<span class="nb">cd </span>ServiceComb-Company-WorkShop/kubernetes/
+
+bash start.sh
+</code></pre></div></div>
+
+<h2 id="yaml文件解读">Yaml文件解读</h2>
+
+<p>　　以作者的实际环境为例：</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>root@zenlin:~/src/LinuxCon-Beijing-WorkShop/kubernetes# kubectl get pod <span class="nt">-owide</span>
+NAME                                      READY     STATUS    RESTARTS   AGE       IP            NODE
+company-beekeeper-3737555734-48sxf        1/1       Running   0          17s       10.244.2.49   zenlinnode2
+company-bulletin-board-4113647782-th91w   1/1       Running   0          17s       10.244.1.53   zenlinnode1
+company-doorman-3391375245-g0p8c          1/1       Running   0          17s       10.244.1.55   zenlinnode1
+company-manager-454733969-0c1g8           1/1       Running   0          16s       10.244.2.50   zenlinnode2
+company-worker-1085546725-x7zl4           1/1       Running   0          17s       10.244.1.54   zenlinnode1
+zipkin-508217170-0khr3                    1/1       Running   0          17s       10.244.2.48   zenlinnode2
+</code></pre></div></div>
+
+<p>　　可以看到，一共启动了6个pod，分别为，公司经理（company-manager）、门卫（company-doorman）、公告栏（company-bulletin-board）、技工（company-worker）、养蜂人（company-beekeeper）、调用链跟踪（zipkin），K8S集群分别为他们分配对应的集群IP。</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>root@zenlin:~/src/LinuxCon-Beijing-WorkShop/kubernetes# kubectl get svc <span class="nt">-owide</span>
+NAME                     CLUSTER-IP      EXTERNAL-IP   PORT<span class="o">(</span>S<span class="o">)</span>          AGE       SELECTOR
+company-bulletin-board   10.99.70.46     &lt;none&gt;        30100/TCP        12m       io.kompose.service<span class="o">=</span>company-bulletin-board
+company-manager          10.100.61.227   &lt;nodes&gt;       8083:30301/TCP   12m       io.kompose.service<span class="o">=</span>company-manager
+zipkin                   10.104.92.198   &lt;none&gt;        9411/TCP         12m       io.kompose.service<span class="o">=</span>zipkin
+</code></pre></div></div>
+
+<p>　　仅启动了3个service，调用链跟踪（zipkin）、公告栏（company-bulletin-board）以及经理（company-manager），这是因为，调用链跟踪和公告栏需要在集群内被其他服务通过域名来调用，而经理需要作为对外作为网关，统一暴露服务端口。</p>
+
+<p>　　查看company-bulletin-board-service.yaml文件，</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="na">apiVersion</span><span class="pi">:</span> <span class="s">v1</span>
+    <span class="na">kind</span><span class="pi">:</span> <span class="s">Service</span>
+    <span class="na">metadata</span><span class="pi">:</span>
+      <span class="na">creationTimestamp</span><span class="pi">:</span> <span class="no">null</span>
+      <span class="na">labels</span><span class="pi">:</span>
+<span class="err">    	</span><span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-bulletin-board</span>
+      <span class="s">name</span><span class="pi">:</span> <span class="s">company-bulletin-board</span>
+    <span class="s">spec</span><span class="pi">:</span>
+      <span class="na">ports</span><span class="pi">:</span>
+<span class="err">    </span><span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">30100"</span>
+      <span class="na">port</span><span class="pi">:</span> <span class="m">30100</span>
+      <span class="na">targetPort</span><span class="pi">:</span> <span class="m">30100</span>
+        <span class="na">selector</span><span class="pi">:</span>
+      <span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-bulletin-board</span>
+      <span class="na">status</span><span class="pi">:</span>
+        <span class="na">loadBalancer</span><span class="pi">:</span> <span class="pi">{}</span>
+</code></pre></div></div>
+
+<p>　　该文件定义了公告栏对应的service，给service定义了name、port和targetPort，这样通过kubectl expose创建的service会在集群内具备DNS能力，在其他服务刚启动还未注册到公告栏（服务注册发现中心）时，就是使用该能力来访问到公告栏并注册服务的。</p>
+
+<p>　　对于label和selector的作用，在一个service启动多个pod的场景下将会非常有用，当某个pod崩溃时，服务的selector将会自动将死亡的pod从endpoints中移除，并且选择新的pod加入到endpoints中。</p>
+
+<p>　　查看company-worker-deployment.yaml 文件，</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">apiVersion</span><span class="pi">:</span> <span class="s">extensions/v1beta1</span>
+<span class="na">kind</span><span class="pi">:</span> <span class="s">Deployment</span>
+<span class="na">metadata</span><span class="pi">:</span>
+  <span class="na">creationTimestamp</span><span class="pi">:</span> <span class="no">null</span>
+  <span class="na">labels</span><span class="pi">:</span>
+<span class="err">	</span><span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-worker</span>
+  <span class="s">name</span><span class="pi">:</span> <span class="s">company-worker</span>
+<span class="na">spec</span><span class="pi">:</span>
+  <span class="na">replicas</span><span class="pi">:</span> <span class="m">1</span>
+  <span class="na">strategy</span><span class="pi">:</span> <span class="pi">{}</span>
+  <span class="na">template</span><span class="pi">:</span>
+<span class="err">	</span><span class="na">metadata</span><span class="pi">:</span>
+<span class="err">  	</span><span class="na">creationTimestamp</span><span class="pi">:</span> <span class="no">null</span>
+  <span class="err">	</span><span class="s">labels</span><span class="pi">:</span>
+<span class="err">    	</span><span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-worker</span>
+<span class="na">spec</span><span class="pi">:</span>
+  <span class="na">containers</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="na">env</span><span class="pi">:</span>
+    <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">ARTIFACT_ID</span>
+      <span class="na">value</span><span class="pi">:</span> <span class="s">worker</span>
+    <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">JAVA_OPTS</span>
+      <span class="na">value</span><span class="pi">:</span> <span class="s">-Dcse.service.registry.address=http://company-bulletin-board:30100 -Dservicecomb.tracing.collector.adress=http://zipkin:9411</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s">servicecomb/worker:0.0.1-SNAPSHOT</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">company-worker</span>
+    <span class="na">ports</span><span class="pi">:</span>
+    <span class="pi">-</span> <span class="na">containerPort</span><span class="pi">:</span> <span class="m">7070</span>
+    <span class="pi">-</span> <span class="na">containerPort</span><span class="pi">:</span> <span class="m">8080</span>
+    <span class="na">resources</span><span class="pi">:</span> <span class="pi">{}</span>
+  <span class="na">restartPolicy</span><span class="pi">:</span> <span class="s">Always</span>
+<span class="na">status</span><span class="pi">:</span> <span class="pi">{}</span>
+</code></pre></div></div>
+
+<p>　　该yaml文件定义了副本数为1（replicas: 1）的pod，可以通过修改该副本数控制所需启动的pod的副本数量（当然也可以使用K8S的弹性伸缩能力去实现按需动态水平伸缩，弹性伸缩部分将在后面的博文中提供）。前面我们提到过company-bulletin-board具备了DNS的能力，故现在可以通过该Deployment中的env传递cse.service.registry.address的值给pod内的服务使用，如： -Dcse.service.registry.address=http://company-bulletin-board:30100，<a href="https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/README.md">kube-dns</a>将会自动解析该servicename。</p>
+
+<p>　　对于kubernetes如何实现服务间通信，可以阅读<a href="https://kubernetes.io/docs/concepts/services-networking/connect-applications-service/">connect-applications-service</a>。</p>
+
+<p>　　其他的deployment.yaml以及service.yaml都跟以上大同小异，唯一例外的是company-manager服务，我们可以看到在company-manager-service.yaml中看到定义了nodePort，这将使能company-manager对集群外部提供公网IP和服务端口，如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spec</span><span class="pi">:</span>
+  <span class="na">ports</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">8083"</span>
+<span class="err">  	</span><span class="na">port</span><span class="pi">:</span> <span class="m">8083</span>
+<span class="err">  	</span><span class="na">targetPort</span><span class="pi">:</span> <span class="m">8080</span>
+<span class="err">  	</span><span class="na">nodePort</span><span class="pi">:</span> <span class="m">30301</span>
+<span class="err">  	</span><span class="na">protocol</span><span class="pi">:</span> <span class="s">TCP</span>
+  <span class="s">type</span><span class="pi">:</span> <span class="s">NodePort</span>
+</code></pre></div></div>
+
+<p>　　可以通过以下方法获得公网IP和服务端口：</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>kubectl get svc company-manager <span class="nt">-o</span> yaml | <span class="nb">grep </span>ExternalIP <span class="nt">-C</span> 1
+kubectl get svc company-manager <span class="nt">-o</span> yaml | <span class="nb">grep </span>nodePort <span class="nt">-C</span> 1
+</code></pre></div></div>
+
+<p>　　接下来你就可以使用公网IP和服务端口访问已经部署好的company了，在<a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop/blob/master/kubernetes/README.md">github.com/ServiceComb/ServiceComb-Company-WorkShop/kubernetes</a>上详细提供了通过在集群内访问和集群外访问的方法。</p>
+
+<h2 id="模型归纳">模型归纳</h2>
+
+<p>　　通过详细阅读所有的deployment.yaml和service.yaml，可以整理出以下的模型：</p>
+
+<p><img src="/assets/images/kubernetes-company-cn.PNG" alt="kubernetes-company" class="align-center" /></p>
+
+<p>　　另外，经典的航空订票系统Acmeair也已经支持在kubernetes上一键式部署基于ServiceComb框架开发的版本，点击访问<a href="https://github.com/WillemJiang/acmeair/tree/master/kubernetes">Run Acmeair on Kubernetes</a>获取 。</p>
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+    <meta itemprop="headline" content="ServiceComb示例讲解微服务配置中心选型与对接">
+    <meta itemprop="description" content="ServiceComb对接配置中心">
+    <meta itemprop="datePublished" content="April 04, 2018">
+    <meta itemprop="dateModified" content="April 04, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb示例讲解微服务配置中心选型与对接
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h3 id="配置中心">配置中心</h3>
+
+<p>项目代码中经常会用到各种配置项，比如下面的代码中是从系统环境变量中获取<code class="highlighter-rouge">prop</code> :</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">String</span> <span class="n">prop</span> <span class="o">=</span> <span class="nc">System</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="n">myProperty</span><span class="o">);</span>
+<span class="kt">int</span> <span class="n">x</span> <span class="o">=</span> <span class="no">DEFAULT_VALUE</span><span class="o">;</span>
+<span class="k">try</span> <span class="o">{</span>
+    <span class="n">x</span> <span class="o">=</span> <span class="nc">Integer</span><span class="o">.</span><span class="na">parseInt</span><span class="o">(</span><span class="n">prop</span><span class="o">);</span>
+<span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">NumberFormatException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span>
+    <span class="c1">// handle format issues</span>
+<span class="o">}</span>
+<span class="n">myMethod</span><span class="o">(</span><span class="n">x</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p>类似使用环境变量或者<code class="highlighter-rouge">properties</code>和<code class="highlighter-rouge">xml</code>等文件方式传入配置进而控制应用表现的方法广泛应用于开发过程中，这样做可以将外部配置与业务代码解耦，若有变动只需修改配置参数而不需要重新编译构建项目。但是这种将配置和代码放在一起的方式可能会泄露隐私信息（比如密码），因为代码可能会公开，出于安全的考虑，配置和代码分离管理的方式开始广泛使用，常见的方法比如将配置放在CI服务器上通过打包脚本打入应用包中，或者直接放到运行应用的服务器的特定目录下，或者存储到数据库中。这种方式在传统的单体应用中简单有效，但也带来一些新的挑战：</p>
+
+<ul>
+  <li>配置变化频繁时，需要频繁的打包部署应用</li>
+  <li>不同的环境下配置项不同需要分开管理（比如测试环境和生产环境）</li>
+  <li>配置项中的隐私信息虽然避免了随代码公开而泄露，但是还是会打包到应用包中</li>
+</ul>
+
+<p>此外，面对微服务爆发式增长的应用数量和服务器数量带来新的困难</p>
+
+<ul>
+  <li>
+    <p>复杂的业务对应大量的配置项</p>
+  </li>
+  <li>配置项在不同服务中可能出现冲突</li>
+  <li>对集群部署的应用配置进行修改时需要一次修改每个机器上的应用配置</li>
+</ul>
+
+<p>这种背景下，中心化的配置服务即配置中心应运而生，简单来说，配置中心就是一种统一管理各种应用配置的基础服务组件，一个合格的配置中心需要满足：</p>
+
+<ul>
+  <li>配置项容易读取和修改</li>
+  <li>添加新配置要简单直接</li>
+  <li>支持对配置的修改的检视以把控风险</li>
+  <li>可以查看配置修改的历史记录</li>
+  <li>不同部署环境支持隔离</li>
+</ul>
+
+<p>开源社区目前主流的配置中心有spring-cloud-config, ctrip apollo, disconf 等，下表是对其功能特性、技术路线、可用性和易用性等发面的比较[1]供参考。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th> </th>
+      <th style="text-align: left">spring-cloud-config</th>
+      <th style="text-align: left">ctrip apollo</th>
+      <th style="text-align: left">disconf</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>静态配置管理</td>
+      <td style="text-align: left">基于file</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>动态配置管理</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>统一管理</td>
+      <td style="text-align: left">无，需要github</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>多维度管理</td>
+      <td style="text-align: left">无，需要github</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>本地配置缓存</td>
+      <td style="text-align: left">无</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>配置生效时间</td>
+      <td style="text-align: left">重启或手动refresh生效</td>
+      <td style="text-align: left">实时</td>
+      <td style="text-align: left">实时</td>
+    </tr>
+    <tr>
+      <td>配置更新推送</td>
+      <td style="text-align: left">手动触发</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>配置定时拉取</td>
+      <td style="text-align: left">无</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">依赖时事件驱动</td>
+    </tr>
+    <tr>
+      <td>授权、审核、审计</td>
+      <td style="text-align: left">无，需要github</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">无</td>
+    </tr>
+    <tr>
+      <td>配置版本管理</td>
+      <td style="text-align: left">git做版本管理</td>
+      <td style="text-align: left">界面上提供发布历史和回滚按钮</td>
+      <td style="text-align: left">操作记录存数据库，无查询接口</td>
+    </tr>
+    <tr>
+      <td>实例配置监控</td>
+      <td style="text-align: left">需要结合springadmin</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>灰度发布</td>
+      <td style="text-align: left">不支持</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">不支持部分更新</td>
+    </tr>
+    <tr>
+      <td>告警通知</td>
+      <td style="text-align: left">不支持</td>
+      <td style="text-align: left">支持，邮件方式告警</td>
+      <td style="text-align: left">支持，邮件方式告警</td>
+    </tr>
+    <tr>
+      <td>多数据中心部署</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+      <td style="text-align: left">支持</td>
+    </tr>
+    <tr>
+      <td>配置界面</td>
+      <td style="text-align: left">无，通过git操作</td>
+      <td style="text-align: left">统一界面</td>
+      <td style="text-align: left">统一界面</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>综合比较后，ServiceComb选择了Apollo[2]作为配置中心进行对接。Apollo是携程框架部门研发并贡献到开源社区的分布式配置中心，活跃贡献者近百人。最新版本的ServiceComb Java Chassis已实现支持Apollo[1]，用户可以使用该配置中心结合Chassis中集成的Archaius实现在不需要重新启动或重新部署应用的前提下进行配置项的集中管理和动态修改。基于ServiceComb优秀的插件化设计，用户可以非常简单的对接到其他开源或自研的配置中心。</p>
+
+<h3 id="使用简介">使用简介</h3>
+
+<h5 id="启动apollo服务">启动Apollo服务</h5>
+
+<ul>
+  <li>启动Apollo服务</li>
+</ul>
+
+<p>Apollo服务可以通过docker或二进制启动，方法参考官网文档[3]，推荐使用docker启动。</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/lijasonvip/apollo-image-for-servicecomb.git
+<span class="nb">cd </span>apollo-image-for-servicecomb <span class="o">&amp;&amp;</span> docker-compose up
+</code></pre></div></div>
+
+<p>出现<code class="highlighter-rouge">apollo-quick-start | Portal started. You can visit http://localhost:8070 now!</code>后表示Apollo已经启动成功，浏览器访问<code class="highlighter-rouge">http://localhost:8070</code>即可访问<code class="highlighter-rouge">portal</code>服务，默认登录账号为<code class="highlighter-rouge">apollo/admin</code>。</p>
+
+<ul>
+  <li>创建应用</li>
+</ul>
+
+<p>登录后点击创建项目，填入应用名称，其他选默认即可，创建应用后需要进入应用点击发布才能生效。</p>
+
+<p><img src="/assets/images/config/create-project.png" alt="" /></p>
+
+<ul>
+  <li>生成TOKEN</li>
+</ul>
+
+<p>应用发布后我们需要获取一个TOKEN，在<code class="highlighter-rouge">http://localhost:8070/open/manage.html</code>页面填入刚才创建的应用ID和应用名称并选择项目和部门信息后点击创建即可生成一个TOKEN，保存此TOKEN并配置到Chassis应用的配置文件中。</p>
+
+<p><img src="/assets/images/config/token.png" alt="" /></p>
+
+<h5 id="引入依赖">引入依赖</h5>
+
+<p>在Chassis应用的pom文件中引入依赖<code class="highlighter-rouge">config-apollo</code>：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>config-apollo<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h5 id="添加配置">添加配置</h5>
+
+<p>在Chassis应用的配置文件<code class="highlighter-rouge">microservice.yaml</code>中增加以下配置：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="na">apollo</span><span class="pi">:</span>
+     <span class="na">config</span><span class="pi">:</span>
+       <span class="na">serverUri</span><span class="pi">:</span> <span class="s">http://127.0.0.1:8070</span><span class="err">		</span><span class="s">#Apollo portal服务地址</span>
+       <span class="na">serviceName</span><span class="pi">:</span> <span class="s">SampleApp</span><span class="err">				</span><span class="s">#创建应用时的AppID</span>
+       <span class="na">env</span><span class="pi">:</span> <span class="s">DEV</span><span class="err">								</span><span class="s">#env默认是DEV</span>
+       <span class="na">clusters</span><span class="pi">:</span> <span class="s">default</span><span class="err">					</span><span class="s">#cluster默认default</span>
+       <span class="na">namespace</span><span class="pi">:</span> <span class="s">application</span><span class="err">				</span><span class="s">#namespace默认application</span>
+       <span class="na">token</span><span class="pi">:</span> <span class="s">de3c5b2e6d8535b96</span><span class="err">				</span><span class="s">#第一步中生成的TOKEN</span>
+       <span class="na">refreshInterval</span><span class="pi">:</span> <span class="s">10</span><span class="err">					</span><span class="s">#自动拉取配置的时间间隔</span>
+</code></pre></div></div>
+
+<p>至此，通过简单的4步应用已经成功的对接到了Apollo配置中心，启动应用后可以在Apollo页面通过对配置项的新增、更新、回滚等操作进行服务治理啦！Demo参考[4]。</p>
+
+<p><img src="/assets/images/config/configuration.png" alt="" /></p>
+
+<h3 id="对接配置中心">对接配置中心</h3>
+
+<p>Chassis动态配置基于Netflix的Archaius实现[5]，Archaius扩展数据源方法参考文档[6]和demo[7]，Chassis按照[6]扩展了<code class="highlighter-rouge">PolledConfigurationSource</code> 和 <code class="highlighter-rouge">AbstractPollingScheduler</code>，启动的时候用SPI机制找到Source接口的实现类。</p>
+
+<p>对接到一个新的配置中心只要扩展实现<code class="highlighter-rouge">ConfigCenterConfigurationSource</code>接口，实现<code class="highlighter-rouge">init</code>方法，在<code class="highlighter-rouge">init</code>方法中实现连接配置中心，刷新配置项的逻辑即可。具体代码请参考[8]。</p>
+
+<ul>
+  <li>
+    <p>设计配置项</p>
+
+    <p>对接到新的配置中心可以设计新的配置参数，定义新的工具类获取这些参数，并指定默认值，参考<code class="highlighter-rouge">ApolloConfig</code>类对新增<code class="highlighter-rouge">apollo.config.serverUri</code>等参数的处理。</p>
+  </li>
+  <li>
+    <p>扩展Source接口</p>
+
+    <p>init函数实现固定时间间隔或实时获取配置中心的配置项逻辑。<code class="highlighter-rouge">ApolloClient</code>中<code class="highlighter-rouge">refreshApolloConfig</code>函数启动了一个定时执行的线程刷新配置项：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">refreshApolloConfig</span><span class="o">()</span> <span class="o">{</span>
+    <span class="no">EXECUTOR</span>
+        <span class="o">.</span><span class="na">scheduleWithFixedDelay</span><span class="o">(</span><span class="k">new</span> <span class="nc">ConfigRefresh</span><span class="o">(</span><span class="n">serviceUri</span><span class="o">),</span> 
+                                <span class="n">firstRefreshInterval</span><span class="o">,</span> 
+                                <span class="n">refreshInterval</span><span class="o">,</span> 
+                                <span class="nc">TimeUnit</span><span class="o">.</span><span class="na">SECONDS</span><span class="o">);</span>
+  <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><code class="highlighter-rouge">ConfigRefresh</code>线程的<code class="highlighter-rouge">run</code>中会从Apollo配置中心获取最新配置项并和之前的配置项对比分析出新增、修改和删除的配置参数，然后去执行对应的更新操作。对配置项的修改更新都是基于Archaius的<code class="highlighter-rouge">WatchedUpdateListener</code> 进而实现应用内参数的动态更新。</p>
+  </li>
+</ul>
+
+<h3 id="加入servicecomb社区">加入ServiceComb社区</h3>
+
+<p>ServiceComb目前在Apache基金会孵化，诚挚的欢迎开发者和用户一起参与社区讨论和贡献，加入社区的方法有订阅邮件列表，关注微信公众号，加入社区微信群等，详细方法请参考[9]。</p>
+
+<h3 id="参考资料">参考资料</h3>
+
+<p>[0] ServiceComb 项目地址 <a href="https://github.com/apache/incubator-servicecomb-java-chassis">https://github.com/apache/incubator-servicecomb-java-chassis</a></p>
+
+<p>[1] 开源配置中心比较 <a href="https://github.com/ctripcorp/apollo/wiki/FAQ">https://github.com/ctripcorp/apollo/wiki/FAQ</a></p>
+
+<p>[2] ctrip apollo <a href="https://github.com/ctripcorp/apollo/">https://github.com/ctripcorp/apollo/</a></p>
+
+<p>[3] Apollo启动 <a href="https://github.com/ctripcorp/apollo/wiki/Quick-Start">https://github.com/ctripcorp/apollo/wiki/Quick-Start</a></p>
+
+<p>[4] Chassis应用使用Apollo配置中心Demo <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/config-apollo-sample">https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/config-apollo-sample</a></p>
+
+<p>[5] Netflix Archaius <a href="https://github.com/Netflix/archaius/">https://github.com/Netflix/archaius/</a></p>
+
+<p>[6] Archaius 扩展数据源 <a href="https://github.com/Netflix/archaius/wiki/Users-Guide">https://github.com/Netflix/archaius/wiki/Users-Guide</a></p>
+
+<p>[7] Archaius 对接Redis Demo <a href="https://github.com/cnwrinc/archaius-redis">https://github.com/cnwrinc/archaius-redis</a></p>
+
+<p>[8] Chassis对接配置中心代码 <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/dynamic-config/config-apollo">https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/dynamic-config/config-apollo</a></p>
+
+<p>[9] 加入ServiceComb社区 <a href="https://servicecomb.incubator.apache.org/cn/docs/join_the_community">https://servicecomb.incubator.apache.org/cn/docs/join_the_community</a></p>
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+    <meta itemprop="headline" content="Consul Service Mesh实战">
+    <meta itemprop="description" content="Consul Service Mesh介绍与相关实践">
+    <meta itemprop="datePublished" content="July 21, 2018">
+    <meta itemprop="dateModified" content="July 21, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Consul Service Mesh实战
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
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+</p>
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+        
+      
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+      <section class="page__content" itemprop="text">
+        <h2 id="consul-service-mesh实战">Consul Service Mesh实战</h2>
+
+<p>在最近发布的<a href="https://github.com/hashicorp/consul/releases">Consul1.2</a>中，<a href="https://www.hashicorp.com/">HashiCorp</a>宣布支持Service Mesh。作为一个优秀的分布式服务发现解决方案，Consul是如何支持Service Mesh的呢？本文将带读者一探究竟。</p>
+
+<p>在Consul 1.2的<a href="https://www.hashicorp.com/blog/consul-1-2-service-mesh">release blog</a>中，Consul定义了Service Mesh的3个要素：</p>
+
+<ol>
+  <li><strong>Discovery</strong>：服务可以互相找到</li>
+  <li><strong>Configuration</strong>：服务在运行时，可以从一个集中的源头获取配置</li>
+  <li><strong>Segmentation</strong>：服务之间的通信必须是加密并通过认证的</li>
+</ol>
+
+<p>实际上，Consul本身已经支持服务发现，并且实现了一个集群共享的KV存储方案，可以实现服务配置的存储。而最新的Consul 1.2中，新发布的Connect功能，可以为服务创建一个网络层的代理，这成为Consul Service Mesh方案中，数据面代理的基础。接下来，我们从这三个方面一一对Consul进行解析。</p>
+
+<h4 id="discovery">Discovery</h4>
+
+<p>Consul是一个跨数据中心的分布式服务发现解决方案。在Consul集群的每一个节点上，都运行一个Consul进程，成为一个Consul agent，一个agent可以以server或client两种模式运行。Client agent非常轻量，只需与Server agent交互，并维护Client自身很少的状态。而Server agent除了Client agent的所有功能，还提供额外的能力来完成基于Raft的一致性方案，因此Server agent的负载会更高，也需要更多的资源，运行在更加稳定的节点上。Consul agent可以通过join命令，指定集群中任意一个agent的IP，以加入集群，形成一个Consul cluster。如下图所示：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/consul-cluster.jpg" alt="consul-cluster" /></p>
+
+<p>在单个节点上，Consul agent读取该节点服务的配置文件，获取该节点上服务的信息，并与cluster中其他agent通过gossip协议互相通信，完成集群内的服务注册与发现。当Consul cluster中的服务需要调用另一个服务时，可以通过API和DNS解析两种方式，向所在节点的Consul agent获取目标服务的具体地址，然后调用目标服务。</p>
+
+<h4 id="configuration">Configuration</h4>
+
+<p>除了服务注册与发现，Consul还内置了一个KV存储系统，用于Cluster之间共享数据。KV的Key是分层的，通过斜线<code class="highlighter-rouge">/</code>分隔，这样，可以在概念上对key进行组织和管理，用来保存不同的配置，并把配置分配给集群内的所有服务。例如，在一个集群内，运行了<code class="highlighter-rouge">webfront</code>服务，<code class="highlighter-rouge">webfront</code>服务需要获知当前是开发环境还是测试环境，以提供不同的页面表现。那么，我们在可以在节点A上用KV存储保存环境信息：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>nodeA<span class="nv">$ </span>consul kv put services/webapi/metadata/env dev <span class="c">#假设env=dev表示测试环境</span>
+</code></pre></div></div>
+
+<p>服务运行过程中，假设任务调度器将<code class="highlighter-rouge">webfront</code>服务的实例调度到节点B和节点C，那么在节点B和C上可以通过Consul agent访问到环境信息：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>nodeB<span class="nv">$ </span>consul kv get services/webapi/metadata/env
+nodeB<span class="nv">$ </span>dev
+</code></pre></div></div>
+
+<p>当然，在实际的使用中，我们不仅可以通过命令行来获取KV数据，也可以通过RESTful API，向所在节点的Consul agent发送HTTP请求来获取数据。</p>
+
+<h4 id="segmentation">Segmentation</h4>
+
+<p>按照Consul的说明，Segmentation的意义在于使服务之间的网络请求都是经过TLS加密并认证的。那么，Consul是如何做到请求的自动TLS加密和认证的呢？</p>
+
+<p>Consul 1.2新增了Connect功能，只需要在服务中增加一个<code class="highlighter-rouge">connect</code>配置，即可为该服务启动一个代理：</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+    </span><span class="nl">"service"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+        </span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"webfront"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"connect"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"proxy"</span><span class="p">:</span><span class="w"> </span><span class="p">{}</span><span class="w">
+        </span><span class="p">}</span><span class="w">
+    </span><span class="p">}</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>这样，Consul agent就会为<code class="highlighter-rouge">webfront</code>服务启动一个内置的proxy，proxy启动时，向所在节点的Consul agent（为了便于说明，假设为Client agent，其实Client/Server都是可能的）请求<code class="highlighter-rouge">webfront</code>所需要的root证书和leaf证书。Client agent检查本地的缓存，若已有所需证书，则直接将证书和私钥返回。否则就会生成一个新的私钥，并向Server agent发送CSR。Server对CSR进行验证，并返回签名的证书，Client agent拿到证书，把证书和私钥返回给proxy。这样，proxy就可以接受TLS请求了。这个过程如下：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/consul-tls.jpg" alt="consul-tls" /></p>
+
+<p>并且，Consul中还有一个自动更新的机制，当Server中的根证书变化时，Client重新生成私钥，向Server发送CSR，获取签名的证书，并把签名的证书和私钥再发给proxy，完成证书的更新。</p>
+
+<p>了解了Consul Connect，我们会发现，其实Connect功能帮每个服务启动了一个Proxy，对服务的inbound/outbound请求进行了TLS加密和认证，这个场景是否似曾相识？没错，就是Service Mesh中数据面sidecar的概念。只是这个Consul内建的sidecar目前能实现的功能还比较单一，只有TLS加密和认证。</p>
+
+<p>现在，我们对Consul Service Mesh的三个要素都有了较为具体了解，那么，相比于一般意义上的Service Mesh方案，例如Istio，Conduit等，Consul的Service Mesh有何不同呢？我们不妨以Istio为例，看看Istio中是如何实现这三个要素的：</p>
+
+<p><strong>Discovery</strong>：由Pilot结合服务发现机制（kubernetes，eureka，consul等）完成</p>
+
+<p><strong>Configuration</strong>：由Pilot结合Kubernetes完成，用户使用kubectl定义Istio所需的Kubernetes资源，Pilot读取到这些资源后，转换为自己的Model，并通过xDS API将配置信息下发给Envoy</p>
+
+<p><strong>Segmentation</strong>：Citadel结合Envoy完成，Citadel将证书颁发给每个服务的Envoy</p>
+
+<p>因此，Istio的结构是这样的：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/istio-architecture.jpg" alt="istio-architecture" /></p>
+
+<p>可以看到Discovery和Configuration都是在Istio控制面完成的。Segmentation是由控制面的Citadel+数据面的Envoy代理完成的。</p>
+
+<p>根据HashiCorp的说明，在Consul的Service Mesh方案中，Consul作为控制面运行，Consul agent实现了服务发现和配置存储。同时，Consul agent再结合Connect启动的Proxy，完成了网络流量的加密与认证。如下图所示：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/consul-proxy-certs.jpg" alt="consul-proxy-certs" /></p>
+
+<p>请注意，Consul的KV系统只完成了配置的存储，并没有像Istio一样，可以对配置进行动态修改并下发到数据面，目前Proxy的配置也是通过读取文件，然后在启动或重启代理时传入的，因此我们认为Consul的配置管理能力还需要完善。此外，因为Consul Connect启动的Proxy是一个4层代理，无法提供路由、熔断、重试等更高级的微服务治理能力，因此也不需要获取服务治理的配置。这是Consul Service Mesh的方案中治理能力欠缺的地方。不过，HashiCorp也表示Connect在1.2版本中只是Beta状态，未来会继续围绕Connect开发新的功能，包括UI的增强，支持Envoy作为proxy，与Nomad和Kubernetes的集成等。</p>
+
+<h4 id="等等听说consul已经可以集成envoy了">等等，听说Consul已经可以集成Envoy了？</h4>
+
+<p>没错！其实，在Consul1.2中，Connect已经可以通过指定一个可执行文件的路径来启动第三方代理了。Consul会以daemon模式启动第三方代理，在后台运行：</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+    </span><span class="nl">"service"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+        </span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"webfront"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"connect"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"proxy"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+                </span><span class="nl">"exec_mode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"daemon"</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"command"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"/usr/bin/my-proxy"</span><span class="p">,</span><span class="w"> </span><span class="s2">"--listen"</span><span class="p">,</span><span class="w"> </span><span class="s2">"8800"</span><span class="p">]</span><span class="w">
+            </span><span class="p">}</span><span class="w">
+        </span><span class="p">}</span><span class="w">
+    </span><span class="p">}</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>那么，按照通常的思路，是不是可以直接指定Envoy，让Consul启动Envoy来实现集成呢？理论上确实可行，但是Consul是无法管理第三方代理的配置的，Envoy的配置只能由用户自行定义，增加了运维成本，也不便于管理。</p>
+
+<p>这时，就轮到HashiCorp好基友<a href="https://www.solo.io/">solo.io</a>出品的<a href="https://github.com/solo-io/gloo-connect">Gloo Connect</a>闪亮登场了！solo.io是一家提供Cloud Native工具和集成方案的公司，例如支持Kubernetes和Istio的微服务debugger <a href="https://github.com/solo-io/squash">squash</a>，基于Envoy的function gateway解决方案<a href="https://github.com/solo-io/gloo">Gloo</a>。在刚刚过去的<a href="https://www.hashidays.com/">HashiDay 2018</a>上，solo.io和HashiCorp联合发布了Gloo Connect。Gloo产品线本身很有意思，Gloo与英文单词”胶水”(Glue)的发音一样，暗示着Gloo会作为”胶水”，将Cloud Native中的各种服务粘合在一起，那么，Gloo Connect是如何把Consul和Envoy粘合在一起的呢？</p>
+
+<p>Gloo Connect作为Consul的第三方代理，在启动时会把Consul Connect proxy的配置和Gloo的配置转换成Envoy的配置，并启动Envoy实例。同时，Gloo Connect也可以通过命令行对Envoy的配置进行动态修改。下面，我们根据Gloo Connect的官方示例来演示如何将Consul与Envoy集成。</p>
+
+<h6 id="tips">Tips</h6>
+
+<p>根据Gloo Connect的<a href="https://github.com/solo-io/gloo-connect/blob/master/docs/getting-started/README.md">Getting Started文档</a>，Consul 1.2.0中，存在一个已知bug，运行示例需要下载一个<a href="https://github.com/solo-io/gloo-connect/releases/download/v0.1.0/consul">预先编译的Consul版本</a>，或者使用1.2.1版本，并把Consul配置到系统路径，或者当前目录。</p>
+
+<p>首先，我们将gloo-connect项目clone到本地，进入getting-started目录，并编译运行<code class="highlighter-rouge">service.go</code>：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>git clone https://github.com/solo-io/gloo-connect/
+<span class="nv">$ </span><span class="nb">cd </span>gloo-connect/docs/getting-started
+<span class="nv">$ </span>go run service.go &amp;
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">service.go</code>运行后监听8080端口，交替返回200和500状态码。接下来，我们执行当前目录下的<code class="highlighter-rouge">run-consul.sh</code>脚本，该脚本会在<code class="highlighter-rouge">./run-data/consul-config</code>目录下生成两个配置信息<code class="highlighter-rouge">connect.json</code>和<code class="highlighter-rouge">service.json</code>，前者将gloo-connect指定为Consul Connect默认的proxy，后者定义了两个服务<code class="highlighter-rouge">microsvc1</code>（即我们运行的service.go） 和<code class="highlighter-rouge">test</code>，并定义了两者之间的代理：<code class="highlighter-rouge">microsvc1</code>配置了一个空规则的代理，<code class="highlighter-rouge">test</code>配置了一个监听1234端口的代理，任何访问1234端口的请求，都将被当作<code class="highlighter-rouge">test</code>向<code class="highlighter-rouge">microsvc1</code>的访问。最后，脚本启动consul，并设定consul的配置目录为<code class="highlighter-rouge">./run-data/consul-config</code>。此外，脚本还会运行gloo-connect和envoy，需要确保两者在系统路径或当前目录下并具有执行权限，gloo-connect项目的发布页面可以<a href="https://github.com/solo-io/gloo-connect/releases">下载编译好的gloo-connect和envoy</a></p>
+
+<p>脚本启动后，我们通过进程管理工具，可以看到Consul为每个服务启动了第三方代理gloo-connect，而每个gloo-connect又启动了一个Envoy进程，并把转换好的配置传给Envoy：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/gloo-connect.png" alt="gloo-connect" /></p>
+
+<p>此时，真正监听1234端口的就是Envoy进程了。下面，我们访问1234端口，会看到服务交替返回状态码200和500：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/req-microsvc1-by-proxy.png" alt="req-microsvc1-by-proxy" /></p>
+
+<p>我们用gloo-connect命令为<code class="highlighter-rouge">microsvc1</code>的Envoy sidecar配置一条retry规则：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./gloo-connect <span class="nb">set </span>service microsvc1 <span class="nt">--http</span> <span class="nt">--retries</span><span class="o">=</span>3
+</code></pre></div></div>
+
+<p>这样，当通过Envoy代理访问<code class="highlighter-rouge">microsvc1</code>时，如果遇到500，会重试3次，其实在第一次重试时就会返回200了，因此我们访问1234端口，每次都会返回200：</p>
+
+<p><img src="https://github.com/crystaldust/imagestorage/raw/master/consul-servicemesh/gloo-connect-retries.png" alt="gloo-connect-retries" /></p>
+
+<p>这样，我们就借助一个第三方工具gloo-connect，实现了Consul和Envoy的集成！需要说明的是，gloo-connect也处于早期阶段，目前支持的配置还比较少，除了<code class="highlighter-rouge">retries</code>，只支持<code class="highlighter-rouge">http</code>（是否使用http模式，默认为false）和<code class="highlighter-rouge">timeout</code>。</p>
+
+<h4 id="总结">总结</h4>
+
+<p>目前来看，Consul Connect虽然还刚刚起步，但是已经让我们非常惊喜的看到了一个相对完整、简单易用的Service Mesh方案，通过第三方的集成，未来也许会有更多优秀的代理，甚至是用户自己定义的代理，不断加入到Consul的阵营中。随着Consul Connect的不断演进和HashiCorp的持续投入，我们相信，Consul会在未来的Service Mesh竞争中占有一席之地，也希望业界不断涌现Consul这样优秀的方案，给用户更多选择，让Service Mesh的世界越来越精彩。</p>
+
+<h4 id="后记">后记</h4>
+
+<p>不同于Istio、Conduit等“天生Service Mesh”的微服务方案，Consul本身是一个成熟的服务发现工具，其实现Service Mesh的思路非常有意思。在笔者看来，除去“控制面”“数据面”这种基于大的框架角度的划分，Service Mesh从功能上要完成三件事情：服务注册与发现，配置管理（存储、下发），服务治理。Consul在第一点已经做得非常好了，配置方面，Consul的集群内共享KV为实现配置管理奠定了坚实的基础，完全可以通过第三方工具、或者Consul自身增强的特性，基于KV实现配置的下发。服务治理方面与Consul本身关系不大，但是通过Connect，Consul具备了为服务配置代理或者集成第三方代理的能力，完全可以用已有的优秀代理来实现Service Mesh数据面，补足服务治理的能力。</p>
+
+<p>Consul的方案，也给已经在业界流行并经过生产环境验证的“上一代”微服务框架带来很多启发。在Service Mesh概念流行之前，已有很多基于SDK的侵入式微服务框架。这些框架往往提供服务发现机制或者或者兼容开源的服务发现机制，有一些也提供配置的管理，只是需要在应用程序中引入SDK来实现服务治理，因此对于不同的语言，都要提供相应的SDK。但是相对于Consul，毕竟这些框架已经具备了微服务治理的能力，它们向Service Mesh转型的过程中，更需要的是将治理能力从SDK转移到网络层面的代理中。在这一点上，华为开源的微服务框架ServiceComb的做法非常值得参考。在ServiceComb中，已有Service Center实现服务的注册与发现，基于archaius的配置更新机制，以及提供治理能力的SDK（支持Java和Go两种语言），为了实现数据面的代理，ServiceComb团队将SDK中实现治理能力的代码剥离出来，基于此开发了网络代理<a href="https://github.com/go-chassis/mesher">Mesher</a>，Mesher的治理能力与SDK是基本对等的，并且共享同一套配置。这样，已经使用SDK的服务，不需要做任何修改，而使用其他语言开发的新应用，则可以通过Mesher获得ServiceComb的服务治理能力。最终，ServiceComb成为同时支持SDK和网络代理的混合式微服务方案，也是一个真正意义上的Service Mesh方案。</p>
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+
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+            <h1 class="page__title" itemprop="headline">客户管理系统微服务化实战-PartI
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+  5 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="客户管理系统微服务化实战-parti">客户管理系统微服务化实战-PartI</h2>
+<h2 id="ddd场景极速开发">——DDD、场景、极速开发</h2>
+
+<p>在今年的LC3大会上，ServiceComb展台所展示的demo视频<code class="highlighter-rouge">“30分钟开发雏形CRM应用”</code>引起了参会者的广泛关注，大家纷纷对其背后的技术表现出浓厚的兴趣。本文将从房地产企业的客户管理管理场景入手，使用领域驱动设计，深入技术细节，详解如何快速开发落地一个微服务化的客户管理系统。</p>
+
+<h1 id="1-牛刀小试">1. 牛刀小试</h1>
+<p>打开浏览器，输入地址<code class="highlighter-rouge">http://start.servicecomb.io/</code>打开SERVICECOMB SPRING INITIALIZR，修改Project Metadata中的<code class="highlighter-rouge">Group</code>，<code class="highlighter-rouge">Artifact</code>和ServiceComb Parameters中的<code class="highlighter-rouge">ServiceCenter Address</code>，<code class="highlighter-rouge">Governance</code>等，点击Generate Project，解压生成下载的demo.zip。</p>
+
+<p><img src="/assets/images/scaffold/StartServiceComb.io.png" alt="SERVICECOMB SPRING INITIALIZR截图" /></p>
+
+<p>运行它也很简单，使用IDE打开项目，DEBUG -&gt; Application.java，或在命令行：</p>
+
+<p>稍等微服务启动就绪，打开浏览器输入<code class="highlighter-rouge">http://localhost:9080/hello</code>验证一下：</p>
+
+<p><img src="/assets/images/scaffold/OutputHello.png" alt="输出hello截图" /></p>
+
+<p>是不是非常轻松呢？</p>
+
+<h1 id="2-脚手架">2. 脚手架</h1>
+<p>在建筑领域，脚手架是施工现场为方便工人操作并解决垂直和水平运输而搭设的各种支架以及平台。</p>
+
+<p><img src="/assets/images/scaffold/Scaffold.jpg" alt="scaffold" /></p>
+
+<p>在软件开发领域，它引申为预提供一些基础框架代码加速开发过程，避免从零开始构建项目。用户只需要依据需求场景选择合适的脚手架，然后填充定制的业务逻辑即可，不必再去处理一些基础功能，例如数据库连接、日志实现、RPC传输等。</p>
+
+<p>微服务框架一般都会提供脚手架功能，例如Spring，提供了SPRING INITIALIZR；ServiceComb基于SPRING INITIALIZR，提供了更具优势的特性：</p>
+<ol>
+  <li>生成的项目除了在POM中自动添加必要的依赖，还会提供Producer和Consumer示例代码（Hello World）；</li>
+  <li>会进一步提供<strong>Edge Server</strong>、<strong>Authcation Server</strong>等更贴近业务的脚手架项目，让用户能快速构建体系完整的微服务系统。</li>
+</ol>
+
+<p>那么什么叫一个完整的微服务系统呢？我们可以拿一个具体的场景做例子，会更有感觉：</p>
+
+<h1 id="3-场景地产crm">3. 场景：地产CRM</h1>
+<p>您经营着一家房地产开发商，销售房产，迫切需要一套销售系统，考虑到微服务的优势，您决定使用微服务的方式构建系统；主要的业务流程也非常简单：用户前来购买购买产品（房产），首先需要登记用户信息，并缴纳一定数量的定金，待交易当日，挑选心仪的产品（房产），支付尾款，完成交易。</p>
+
+<h2 id="31--使用ddd指导地产crm系统的设计">3.1  使用DDD指导地产CRM系统的设计</h2>
+<p>微服务系统的设计方面，领域驱动设计（Domain-Driven Design，DDD）是一个从业务出发的好选择，它由Eric Evans提出，是一种全新的系统设计和建模方法，这里的模型指的就是领域模型（Domain Model）。领域模型通过聚合（Aggregate）组织在一起，聚合间有明显的业务边界，这些边界将领域划分为一个个限界上下文（Bounded Context）。Martin Fowler对它们都有详细的<a href="https://martinfowler.com/tags/domain%20driven%20design.html">解读</a>。</p>
+
+<p>理论概念都搞清楚了，那么怎么来找模型和聚合呢？一个非常流行的方法就是<a href="https://en.wikipedia.org/wiki/Event_storming">Event Storming</a>，它是由Alberto Brandolini发明，经历了DDD社区和很多团队的实践，也是一种非常有参与感的团队活动：</p>
+
+<p><img src="/assets/images/scaffold/EventStorming.png" alt="EventStorming" /></p>
+
+<p>上图就是我们对地产CRM这个场景使用Event Storming探索的结果，现在我们能够将限界上下文清晰的梳理出来：</p>
+
+<p><img src="/assets/images/scaffold/BoundedContext.png" alt="BoundedContext" /></p>
+
+<blockquote>
+  <p>提示：Event Storming是一项非常有创造性的活动，也是一个持续讨论和反复改进的过程，不同的团队关注的核心域（Core Domain）不同，得到的最终结果也会有差异。我们的目的是为了演示完整的微服务系统构建的过程，并不涉及商业核心竞争力方面的探讨，因此没有Core Domain和Sub Domain之类的偏重。</p>
+</blockquote>
+
+<h2 id="32-将分析成果转化为方案域设计">3.2 将分析成果转化为方案域设计</h2>
+<p>当我们完成所有的限界上下文的识别后，可以直接将它们落地为微服务：</p>
+
+<p><img src="/assets/images/scaffold/MicroserviceDesign1.png" alt="MicroserviceDesign1" /></p>
+
+<ol>
+  <li>用户服务：提供用户信息管理服务，这里保存这用户的账号和密码，负责登录和认证；</li>
+  <li>产品（房产）服务：提供产品管理服务，保存着房产的信息诸如价格、是否已售出等信息；</li>
+  <li>支付服务：提供交易时支付服务，模拟对接银行支付定金，以及购房时支付尾款；</li>
+</ol>
+
+<p>由于完成一笔交易是一个复杂的流程，与这三个微服务都有关联，因此我们引入了一个复合服务——交易服务：</p>
+
+<p><img src="/assets/images/scaffold/MicroserviceDesign2.png" alt="MicroserviceDesign2" /></p>
+
+<ol>
+  <li>交易服务：提供产品交易服务，它通过编排调用将整个交易流程串起来,交易服务中有两个流程：
+    <ul>
+      <li>定金支付</li>
+    </ul>
+
+    <p>Step1：通过用户服务验证用户身份；</p>
+
+    <p>Step2：通过支付服务请求银行扣款，增加定金账号内的定金；</p>
+  </li>
+</ol>
+
+<ul>
+  <li>
+    <p>购房交易</p>
+
+    <p>Step1：通过用户服务验证用户身份；</p>
+
+    <p>Step2：通过资源服务确定用户希望购买的资源（房产）尚未售出；</p>
+
+    <p>Step3：通过资源服务标记目标资源（房产）已售出；</p>
+
+    <p>Step4：通过支付服务请求扣减定金账号内的定金，以及银行扣剩下的尾款；</p>
+
+    <p>最后两个步骤需要保证事务一致性，其中Step4包含两个扣款操作。</p>
+  </li>
+</ul>
+
+<p>之后，我们引入Edge服务提供统一入口：</p>
+
+<p><img src="/assets/images/scaffold/MicroserviceDesign3.png" alt="MicroserviceDesign3" /></p>
+
+<ol>
+  <li>Edge服务：很多时候也被称为API网关（API Gateway），负责集中认证、动态路由等等；</li>
+</ol>
+
+<blockquote>
+  <p>提示：Edge服务需要依赖服务注册-发现机制，因此同时导入了ServiceCenter。</p>
+</blockquote>
+
+<p>最后还需要提供UI：</p>
+
+<p><img src="/assets/images/scaffold/MicroserviceDesign4.png" alt="MicroserviceDesign4" /></p>
+
+<ol>
+  <li>前端UI（同样以微服务方式提供）：用户交互界面；</li>
+</ol>
+
+<p>至此，DDD设计地产CRM的工作就结束了。</p>
+
+<h1 id="4-快速实现客户关系管理系统的用户服务">4. 快速实现客户关系管理系统的用户服务</h1>
+<h2 id="41-用户微服务并不简单">4.1 用户微服务并不简单</h2>
+<p>用户微服务是所有系统中不可或缺的部分，它承载了认证和授权等核心功能——无论是登录一个网站、还是打开一个APP，当涉及到需要身份识别后才能够执行的操作，都需要用户微服务把关。例如观看视频网站上的视频，匿名用户会插播广告，如果希望屏蔽广告，则需要登录并购买VIP会员，登录即是身份认证的过程，而VIP屏蔽广告即是授权的过程。</p>
+
+<h5 id="认证">认证</h5>
+<p>认证不仅仅是一次性验证用户名和密码的过程，还需要能反复使用认证的结果，确保后继所有操作都是合法的，这就涉及到“有状态”，但HTTP是一个无状态协议，如何能够将登录成功后的认证信息与后继的请求关联起来呢？</p>
+
+<p>我们非常熟悉的做法是使用Session或Cookie：</p>
+<ul>
+  <li>Session存储在服务端，因此具备良好的防篡改能力，但弊端是使服务有状态，微服务系统中，同一个微服务会依据系统压力的大小弹性伸缩出多个运行实例负载均衡，跨实例访问会状态丢失。</li>
+  <li>Cookie存储在客户端，它正好与Session相反，优势是服务不必保持状态，但弊端是客户比较容易的篡改Cookie信息，例如修改过期时间以逃避验证，而且浏览器对Cookie也有较多限制。</li>
+</ul>
+
+<p>那么，如何兼顾这两方面的需求呢？Token就是一个比较好的解决方案。</p>
+
+<p>Token中文翻译为令牌，它将登录认证后的信息签名后返回，服务端不保存，客户端请求的时候将认证的完整信息附带上提供给服务端验签，签名可以保证信息不被篡改。了解了了解Token的原理，自然要关注Token的格式，JWT就是这样一个基于JSON的开放标准<a href="https://tools.ietf.org/html/rfc7519">RFC-7519</a>。</p>
+
+<h6 id="jwt-java-web-token规范">JWT （Java Web Token）规范</h6>
+<p>简而言之JWT规范由三部分构成：</p>
+<ol>
+  <li>Header： 声明Token的类型也就是JWT，以及加密算法，例如：</li>
+</ol>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+  </span><span class="nl">"typ"</span><span class="p">:</span><span class="w"> </span><span class="s2">"JWT"</span><span class="p">,</span><span class="w">
+  </span><span class="nl">"alg"</span><span class="p">:</span><span class="w"> </span><span class="s2">"HS256"</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<ol>
+  <li>Playload：存放有效信息，既包含标准签发者、用户、签发时间、过期时间，唯一标识等信息；也可以存放用户自定义的声明信息，例如权限控制相关的内容，例如：</li>
+</ol>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+  </span><span class="nl">"sub"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1234567890"</span><span class="p">,</span><span class="w">
+  </span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"YangYong Zheng"</span><span class="p">,</span><span class="w">
+  </span><span class="nl">"iat"</span><span class="p">:</span><span class="w"> </span><span class="mi">1516239022</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<ol>
+  <li>Signature：签名信息，包含Header和Playload的原始信息（Base64编码过）以及签名过后的信息。</li>
+</ol>
+
+<blockquote>
+  <p>提示：JWT IO提供了<a href="https://jwt.io/">在线编码和解码工具</a>。</p>
+</blockquote>
+
+<h5 id="授权">授权</h5>
+<p>授权的本意是指将完成某项工作所必须的权力授给下属人员，在软件系统中往往引申为使人或角色具备访问特定资源或更改行为的许可。例如之前提到的VIP屏蔽广告，即是视频网站允许播放终端在特定的帐号登录后跳过广告播放环节（行为）的许可。</p>
+
+<p>授权系统比较常见的做法有ACL和RBAC：</p>
+<ul>
+  <li>ACL：ACL全称Access Control List，它是以受控资源为核心，每一个受控资源，都有一个权限控制列表记录哪些用户或角色对这项资源执行具体操作（也被称为授权点）的权限设置，例如查询（可见）、修改、删除等等。Windows中的文件系统安全即是一个经典的ACL实现案例：</li>
+</ul>
+
+<p><img src="/assets/images/scaffold/ACL.png" alt="ACL" /></p>
+
+<ul>
+  <li>RBAC：RBAC全称Role Based Access Control，与ACL相比，它以角色为核心，权限落地在角色上，不为特定用户授权。它的优势是大幅简化了用户与权限的管理，在受控对象不多或控制粒度要求不高（例如接口访问控制）的场景下非常适用。</li>
+</ul>
+
+<p><img src="/assets/images/scaffold/RBAC.png" alt="RBAC" /></p>
+
+<p>由于微服务系统的权限控制主要是接口访问控制上，并且多采用用户组方式组织用户，因此RBAC是比较流行的做法。</p>
+
+<h2 id="42-实现用户微服务">4.2 实现用户微服务</h2>
+<h5 id="第一步创建微服务项目">第一步：创建微服务项目</h5>
+<p>使用SERVICECOMB SPRING INITIALIZR创建用户微服务，创建完毕后使用IDEA或Eclipse打开项目，我们删掉HelloImpl和HelloConsumer，之后添加自己的实现。</p>
+
+<h5 id="第二步使用mysql持久化用户信息">第二步：使用MySQL持久化用户信息</h5>
+<p>用户微服务需要持久化用户信息，我们使用MySQL数据库，ORM使用Spring Data JPA：</p>
+<h6 id="引入依赖">引入依赖</h6>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>mysql<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>mysql-connector-java<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-data-jpa<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<h6 id="定义存储user信息的userentity实体">定义存储User信息的UserEntity实体</h6>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Entity</span>
+<span class="nd">@Table</span><span class="o">(</span><span class="n">name</span> <span class="o">=</span> <span class="s">"T_User"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">UserEntity</span> <span class="o">{</span>
+  <span class="nd">@Id</span>
+  <span class="kd">private</span> <span class="nc">String</span> <span class="n">name</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="nc">String</span> <span class="n">password</span><span class="o">;</span>
+
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getName</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">name</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">setName</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getPassword</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">password</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">setPassword</span><span class="o">(</span><span class="nc">String</span> <span class="n">password</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">password</span> <span class="o">=</span> <span class="n">password</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="nf">UserEntity</span><span class="o">()</span> <span class="o">{</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="nf">UserEntity</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">,</span> <span class="nc">String</span> <span class="n">password</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">password</span> <span class="o">=</span> <span class="n">password</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>在CodeFist模式下，Spring Data JPA会在数据库中自动创建T_User表与此实体映射。</p>
+
+<h6 id="实现userentity实体的repository">实现UserEntity实体的Repository</h6>
+<p>我们继承JPA的PagingAndSortingRepository来实现ORM操作</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Repository</span>
+<span class="kd">public</span> <span class="kd">interface</span> <span class="nc">UserRepository</span> <span class="kd">extends</span> <span class="nc">PagingAndSortingRepository</span><span class="o">&lt;</span><span class="nc">UserEntity</span><span class="o">,</span> <span class="nc">Long</span><span class="o">&gt;</span> <span class="o">{</span>
+  <span class="nc">UserEntity</span> <span class="nf">findByName</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h6 id="配置数据库连接">配置数据库连接</h6>
+<p>在项目的<code class="highlighter-rouge">resources</code>目录下新增<code class="highlighter-rouge">application.properties</code>文件，写入数据库连接信息：</p>
+
+<div class="language-properties highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="py">spring.datasource.url</span><span class="p">=</span><span class="s">jdbc:mysql://localhost:3306/user_db?useSSL=false</span>
+<span class="py">spring.datasource.username</span><span class="p">=</span><span class="s">root</span>
+<span class="py">spring.datasource.password</span><span class="p">=</span><span class="s">pwd</span>
+<span class="py">spring.jpa.hibernate.ddl-auto</span><span class="p">=</span><span class="s">update</span>
+<span class="py">spring.jpa.properties.hibernate.dialect</span><span class="p">=</span><span class="s">org.hibernate.dialect.MySQL5Dialect</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：关于Spring Data JPA的更多资料请参见<a href="https://projects.spring.io/spring-data-jpa/">这篇文档</a>，为了能够简化依赖的引入我们实际上使用的是Spring Boot JPA Starter，详细的例子请参见<a href="https://spring.io/guides/gs/accessing-data-jpa/">这篇文档</a>。</p>
+</blockquote>
+
+<h5 id="第三步实现jwt认证">第三步：实现JWT认证</h5>
+<h6 id="定义jwt接口">定义JWT接口</h6>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">TokenStore</span> <span class="o">{</span>
+  <span class="nc">String</span> <span class="nf">generate</span><span class="o">(</span><span class="nc">String</span> <span class="n">userName</span><span class="o">);</span>
+
+  <span class="kt">boolean</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>generate用于生成Token，validate用于验证Token是否正确。</p>
+
+<h6 id="实现tokenstore">实现TokenStore</h6>
+<p>我们使用<a href="https://github.com/jwtk/jjwt">jjwt</a>提供的JWT实现，创建JwtTokenStore类，继承TokenStore接口，并重写方法：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Component</span>
+<span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">JwtTokenStore</span> <span class="kd">implements</span> <span class="nc">TokenStore</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="no">LOGGER</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">JwtTokenStore</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">String</span> <span class="n">secretKey</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="kt">int</span> <span class="n">secondsToExpire</span><span class="o">;</span>
+
+  <span class="kd">public</span> <span class="nf">JwtTokenStore</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">secretKey</span> <span class="o">=</span> <span class="s">"someSecretKeyForAuthentication"</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">secondsToExpire</span> <span class="o">=</span> <span class="mi">60</span> <span class="o">*</span> <span class="mi">60</span> <span class="o">*</span> <span class="mi">24</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="nf">JwtTokenStore</span><span class="o">(</span><span class="nc">String</span> <span class="n">secretKey</span><span class="o">,</span> <span class="kt">int</span> <span class="n">secondsToExpire</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">secretKey</span> <span class="o">=</span> <span class="n">secretKey</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">secondsToExpire</span> <span class="o">=</span> <span class="n">secondsToExpire</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">generate</span><span class="o">(</span><span class="nc">String</span> <span class="n">userName</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nc">Jwts</span><span class="o">.</span><span class="na">builder</span><span class="o">().</span><span class="na">setSubject</span><span class="o">(</span><span class="n">userName</span><span class="o">)</span>
+        <span class="o">.</span><span class="na">setExpiration</span><span class="o">(</span><span class="nc">Date</span><span class="o">.</span><span class="na">from</span><span class="o">(</span><span class="nc">ZonedDateTime</span><span class="o">.</span><span class="na">now</span><span class="o">().</span><span class="na">plusSeconds</span><span class="o">(</span><span class="n">secondsToExpire</span><span class="o">).</span><span class="na">toInstant</span><span class="o">()))</span>
+        <span class="o">.</span><span class="na">signWith</span><span class="o">(</span><span class="no">HS512</span><span class="o">,</span> <span class="n">secretKey</span><span class="o">).</span><span class="na">compact</span><span class="o">();</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">try</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="nc">StringUtils</span><span class="o">.</span><span class="na">isNotEmpty</span><span class="o">(</span><span class="nc">Jwts</span><span class="o">.</span><span class="na">parser</span><span class="o">()</span>
+       <span class="o">.</span><span class="na">setSigningKey</span><span class="o">(</span><span class="n">secretKey</span><span class="o">).</span><span class="na">parseClaimsJws</span><span class="o">(</span><span class="n">token</span><span class="o">).</span><span class="na">getBody</span><span class="o">().</span><span class="na">getSubject</span><span class="o">());</span>
+    <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">JwtException</span> <span class="o">|</span> <span class="nc">IllegalArgumentException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span>
+      <span class="no">LOGGER</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"validateToken token : "</span> <span class="o">+</span> <span class="n">token</span> <span class="o">+</span> <span class="s">" failed"</span><span class="o">,</span> <span class="n">e</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="kc">false</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h5 id="第四步实现用户服务">第四步：实现用户服务</h5>
+<h6 id="定义userservice接口">定义UserService接口</h6>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">UserService</span> <span class="o">{</span>
+  <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">logon</span><span class="o">(</span><span class="nc">UserDTO</span> <span class="n">user</span><span class="o">);</span>
+  <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">login</span><span class="o">(</span><span class="nc">UserDTO</span> <span class="n">user</span><span class="o">);</span>
+<span class="o">}</span>
+
+</code></pre></div></div>
+
+<p>logon用于新用户注册，login用于用户登录验证，UserDTO用于参数传递：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">UserDTO</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="nc">String</span> <span class="n">name</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="nc">String</span> <span class="n">password</span><span class="o">;</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getName</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">name</span><span class="o">;</span>
+  <span class="o">}</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getPassword</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">password</span><span class="o">;</span>
+  <span class="o">}</span>
+  <span class="kd">public</span> <span class="nf">UserDTO</span><span class="o">()</span> <span class="o">{</span>
+  <span class="o">}</span>
+  <span class="kd">public</span> <span class="nf">UserDTO</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">,</span> <span class="nc">String</span> <span class="n">password</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">name</span> <span class="o">=</span> <span class="n">name</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">password</span> <span class="o">=</span> <span class="n">password</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h6 id="实现并发布userservice">实现并发布UserService</h6>
+<p>创建UserServiceImpl，继承<code class="highlighter-rouge">UserService</code>接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"user"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">UserServiceImpl</span> <span class="kd">implements</span> <span class="nc">UserService</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">UserRepository</span> <span class="n">repository</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">TokenStore</span> <span class="n">tokenStore</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="kd">public</span> <span class="nf">UserServiceImpl</span><span class="o">(</span><span class="nc">UserRepository</span> <span class="n">repository</span><span class="o">,</span> <span class="nc">TokenStore</span> <span class="n">tokenStore</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">repository</span> <span class="o">=</span> <span class="n">repository</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">tokenStore</span> <span class="o">=</span> <span class="n">tokenStore</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@PostMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"logon"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">logon</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">UserDTO</span> <span class="n">user</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">validateUser</span><span class="o">(</span><span class="n">user</span><span class="o">))</span> <span class="o">{</span>
+      <span class="nc">UserEntity</span> <span class="n">dbUser</span> <span class="o">=</span> <span class="n">repository</span><span class="o">.</span><span class="na">findByName</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getName</span><span class="o">());</span>
+      <span class="k">if</span> <span class="o">(</span><span class="n">dbUser</span> <span class="o">==</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
+        <span class="nc">UserEntity</span> <span class="n">entity</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">UserEntity</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getName</span><span class="o">(),</span> <span class="n">user</span><span class="o">.</span><span class="na">getPassword</span><span class="o">());</span>
+        <span class="n">repository</span><span class="o">.</span><span class="na">save</span><span class="o">(</span><span class="n">entity</span><span class="o">);</span>
+        <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="kc">true</span><span class="o">,</span> <span class="nc">HttpStatus</span><span class="o">.</span><span class="na">OK</span><span class="o">);</span>
+      <span class="o">}</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"user name had exist"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"incorrect user"</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@PostMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"login"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">login</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">UserDTO</span> <span class="n">user</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">validateUser</span><span class="o">(</span><span class="n">user</span><span class="o">))</span> <span class="o">{</span>
+      <span class="nc">UserEntity</span> <span class="n">dbUser</span> <span class="o">=</span> <span class="n">repository</span><span class="o">.</span><span class="na">findByName</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getName</span><span class="o">());</span>
+      <span class="k">if</span> <span class="o">(</span><span class="n">dbUser</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
+        <span class="k">if</span> <span class="o">(</span><span class="n">dbUser</span><span class="o">.</span><span class="na">getPassword</span><span class="o">().</span><span class="na">equals</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getPassword</span><span class="o">()))</span> <span class="o">{</span>
+          <span class="nc">String</span> <span class="n">token</span> <span class="o">=</span> <span class="n">tokenStore</span><span class="o">.</span><span class="na">generate</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getName</span><span class="o">());</span>
+          <span class="nc">HttpHeaders</span> <span class="n">headers</span> <span class="o">=</span> <span class="n">generateAuthenticationHeaders</span><span class="o">(</span><span class="n">token</span><span class="o">);</span>
+          <span class="c1">//add authentication header</span>
+          <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="kc">true</span><span class="o">,</span> <span class="n">headers</span><span class="o">,</span> <span class="nc">HttpStatus</span><span class="o">.</span><span class="na">OK</span><span class="o">);</span>
+        <span class="o">}</span>
+        <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"wrong password"</span><span class="o">);</span>
+      <span class="o">}</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"user name not exist"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"incorrect user"</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">boolean</span> <span class="nf">validateUser</span><span class="o">(</span><span class="nc">UserDTO</span> <span class="n">user</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">user</span> <span class="o">!=</span> <span class="kc">null</span> <span class="o">&amp;&amp;</span> <span class="nc">StringUtils</span><span class="o">.</span><span class="na">isNotEmpty</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getName</span><span class="o">())</span> <span class="o">&amp;&amp;</span> <span class="nc">StringUtils</span><span class="o">.</span><span class="na">isNotEmpty</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getPassword</span><span class="o">());</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">HttpHeaders</span> <span class="nf">generateAuthenticationHeaders</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">HttpHeaders</span> <span class="n">headers</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HttpHeaders</span><span class="o">();</span>
+    <span class="n">headers</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="no">AUTHORIZATION</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="k">return</span> <span class="n">headers</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>登录成功后，会从TokenStore生成Token，并将其写入Key为<code class="highlighter-rouge">AUTHORIZATION</code>的Header。</p>
+
+<p>由于我们允许任何用户注册和登录，所以目前还没有授权的需求，经过上面四步，具有基本注册和登录功能的用户微服务就构建好了。</p>
+
+<h2 id="43-验证实现的用户服务">4.3 验证实现的用户服务</h2>
+<p>启动用户微服务，我们先注册一个账号：</p>
+
+<p><img src="/assets/images/scaffold/TestLogon.png" alt="TestLogon" /></p>
+
+<p>显示注册成功，现在我们使用这个账号登录：</p>
+
+<p><img src="/assets/images/scaffold/TestLogin.png" alt="TestLogin" /></p>
+
+<p>返回登录成功，Response中已经包含了<code class="highlighter-rouge">AUTHORIZATION</code>Header，后继的所有请求都需要使用这个Token值进行合法认证。</p>
+
+<p>至此，实现客户关系管理系统的用户服务工作就结束了，现在我们会将目光转移到Edge服务，通过Edge服务作为微服务调用的统一入口，在它之上构建统一认证，应对海量级调用的挑战。</p>
+
+<h1 id="5-开发高性能边缘服务">5 开发高性能边缘服务</h1>
+<h2 id="51-什么是边缘服务edge-service">5.1 什么是边缘服务（Edge Service）</h2>
+<p>边缘服务也是一个微服务，微服务化系统通常使用边缘服务（Edge Service）作为所有其它微服务的统一入口，因此它也常常会被称为API Gateway，使用边缘服务的好处有如下几点：</p>
+<ul>
+  <li>动态路由：动态配置URL地址与微服务之间的对应关系，便于扩展，以及实现版本灰度发布等；</li>
+  <li>统一认证：在入口处进行访问认证，避免需要在所有的微服务中都承载重复的认证机制；</li>
+  <li>集中监控：与统一认证类似，在边缘服务对入口调用进行监控，容易统计流量信息。</li>
+</ul>
+
+<h2 id="52-边缘服务的作用和原理">5.2 边缘服务的作用和原理</h2>
+<p>我们先来看不使用边缘服务，UI直接调用用户服务的场景：</p>
+
+<p><img src="/assets/images/scaffold/DirectInvoke.png" alt="DirectInvoke" /></p>
+
+<p>可以看出这种调用方式，UI缺乏一定的灵活性，体现在：</p>
+<ul>
+  <li>UI的实现绑定了Chassis的编程语言Java，无法使用PHP等其它前端技术开发；</li>
+  <li>UI访问微服务的路径无法动态配置，如果作为后端的微服务系统发生调整，则UI很可能需要修改；</li>
+  <li>UI很容易混入复合（编排）调用的逻辑，使得结构变得复杂难以维护。</li>
+</ul>
+
+<p>我们再看引入边缘服务后，UI如何通过边缘服务调用用户服务：</p>
+
+<p><img src="/assets/images/scaffold/InvokeViaEdge.png" alt="InvokeViaEdge" /></p>
+
+<p>Edge服务将在<code class="highlighter-rouge">9090</code>端口上接受http rest调用，我们设计了下面的转发规则：</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>http://{edge-host-name}:9090/{ServiceComb微服务Name}/{服务路径&amp;参数}
+</code></pre></div></div>
+
+<p>用户微服务名（<code class="highlighter-rouge">service_description.name</code>）是<code class="highlighter-rouge">user-service</code>，因此login调用URL：<em>cse://user-service/login</em>可以通过：<em>http://{edge-host-name}:9090/user-service/login</em> 访问。</p>
+
+<p>如此一来，微服务名成为了路径的一部分，http协议的<code class="highlighter-rouge">hostname</code>和<code class="highlighter-rouge">port</code>将固定指向Edge服务保持不变，灵活性大大增加了。</p>
+
+<p>到此我们还可以再做一点点改进，引入一个自定义配置<code class="highlighter-rouge">edge.routing-short-path.{简称}</code>，映射微服务名：</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>edge:
+  routing-short-path:
+    user: user-service
+</code></pre></div></div>
+
+<p>上面的配置代表：<em>http://{edge-host-name}:9090/user/login</em> 等效于：<em>http://{edge-host-name}:9090/user-service/login</em> ，如此一来：</p>
+<ol>
+  <li>URL能够更加简洁；</li>
+  <li>当微服务名发生变化，只需要调整对应的配置，不需要更改前端UI路径代码。</li>
+</ol>
+
+<h2 id="53-实现边缘服务">5.3 实现边缘服务</h2>
+<h5 id="第一步引入edge-core依赖">第一步：引入Edge Core依赖</h5>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>edge-core<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h5 id="第二步编写调度器dispatcher">第二步：编写调度器Dispatcher</h5>
+<p>Edge服务的核心就是调度器Dispatcher，ServiceComb Edge Core中的Dispatcher基于高性能的Vertx Reactive，轻松应对百万量级API请求的挑战；只需要继承AbstractEdgeDispatcher抽象类，添加对应的逻辑即可：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">EdgeDispatcher</span> <span class="kd">extends</span> <span class="nc">AbstractEdgeDispatcher</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="no">LOGGER</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">EdgeDispatcher</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="c1">//此Dispatcher的优先级，Order级越小，路由策略优先级越高</span>
+  <span class="kd">public</span> <span class="kt">int</span> <span class="nf">getOrder</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="mi">10000</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="c1">//初始化Dispatcher的路由策略</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">(</span><span class="nc">Router</span> <span class="n">router</span><span class="o">)</span> <span class="o">{</span>
+    <span class="c1">///捕获 {ServiceComb微服务Name}/{服务路径&amp;参数} 的URL</span>
+    <span class="nc">String</span> <span class="n">regex</span> <span class="o">=</span> <span class="s">"/([^\\\\/]+)/(.*)"</span><span class="o">;</span>
+    <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="nc">CookieHandler</span><span class="o">.</span><span class="na">create</span><span class="o">());</span>
+    <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="n">createBodyHandler</span><span class="o">());</span>
+    <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">failureHandler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onFailure</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onRequest</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="c1">//处理请求，请注意</span>
+  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">onRequest</span><span class="o">(</span><span class="nc">RoutingContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">String</span><span class="o">&gt;</span> <span class="n">pathParams</span> <span class="o">=</span> <span class="n">context</span><span class="o">.</span><span class="na">pathParams</span><span class="o">();</span>
+    <span class="c1">//从匹配的param0拿到{ServiceComb微服务Name}</span>
+    <span class="kd">final</span> <span class="nc">String</span> <span class="n">service</span> <span class="o">=</span> <span class="n">pathParams</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="s">"param0"</span><span class="o">);</span>
+    <span class="c1">//从匹配的param1拿到{服务路径&amp;参数}</span>
+    <span class="nc">String</span> <span class="n">path</span> <span class="o">=</span> <span class="s">"/"</span> <span class="o">+</span> <span class="n">pathParams</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="s">"param1"</span><span class="o">);</span>
+
+    <span class="c1">//还记得我们之前说的做出一点点改进吗？引入一个自定义配置edge.routing-short-path.{简称}，映射微服务名；如果简称没有配置，那么就认为直接是微服务的名</span>
+    <span class="kd">final</span> <span class="nc">String</span> <span class="n">serviceName</span> <span class="o">=</span> <span class="nc">DynamicPropertyFactory</span><span class="o">.</span><span class="na">getInstance</span><span class="o">()</span>
+        <span class="o">.</span><span class="na">getStringProperty</span><span class="o">(</span><span class="s">"edge.routing-short-path."</span> <span class="o">+</span> <span class="n">service</span><span class="o">,</span> <span class="n">service</span><span class="o">).</span><span class="na">get</span><span class="o">();</span>
+
+    <span class="c1">//创建一个Edge转发</span>
+    <span class="nc">EdgeInvocation</span> <span class="n">edgeInvocation</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">EdgeInvocation</span><span class="o">();</span>
+    <span class="c1">//允许接受任意版本的微服务实例作为Provider，未来我们会使用此（设置版本）能力实现灰度发布</span>
+    <span class="n">edgeInvocation</span><span class="o">.</span><span class="na">setVersionRule</span><span class="o">(</span><span class="nc">DefinitionConst</span><span class="o">.</span><span class="na">VERSION_RULE_ALL</span><span class="o">);</span>
+    <span class="n">edgeInvocation</span><span class="o">.</span><span class="na">init</span><span class="o">(</span><span class="n">serviceName</span><span class="o">,</span> <span class="n">context</span><span class="o">,</span> <span class="n">path</span><span class="o">,</span> <span class="n">httpServerFilters</span><span class="o">);</span>
+    <span class="n">edgeInvocation</span><span class="o">.</span><span class="na">edgeInvoke</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h5 id="第三步加载调度器dispatcher">第三步：加载调度器Dispatcher</h5>
+<p>ServiceComb Edge使用SPI（Service Provider Interface）的方式加载已经编写好的调度器Dispatcher，在resources目录下创建<code class="highlighter-rouge">META-INF.services/org.apache.servicecomb.transport.rest.vertx.VertxHttpDispatcher</code>配置文件，写入上一步EdgeDispatcher的类全名：</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>{EdgeDispatcher的包名}.EdgeDispatcher
+</code></pre></div></div>
+
+<h5 id="第四步配置microserviceyaml">第四步：配置microservice.yaml</h5>
+<p>边缘服务本身也是一个微服务，同样需要配置microservice.yaml：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">scaffold</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">edge-service</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="c1">#配置ServiceCenter使得Edge能够发现其他微服务</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+  <span class="c1">#配置Rest Endpoint</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:9090</span>
+
+<span class="c1">#自定义的简称机制配置（这是我们自行扩展实现的）</span>
+<span class="na">edge</span><span class="pi">:</span>
+  <span class="na">routing-short-path</span><span class="pi">:</span>
+    <span class="na">user</span><span class="pi">:</span> <span class="s">user-service</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：</p>
+  <ol>
+    <li>除了配置Rest Endpoint，我们也支持配置Highway Endpoint，但Highway Endpoint只支持ServiceComb开发的微服务调用；</li>
+    <li>microservice.yaml中没有配置Handler，Edge支持所有Consumer端Handler，不支持Producer端Handler，调用链原理如下：</li>
+  </ol>
+
+  <p><img src="/assets/images/scaffold/EdgeOnlySupportConsumerHandler.png" alt="EdgeOnlySupportConsumerHandler" /></p>
+
+</blockquote>
+
+<h2 id="54-验证边缘服务">5.4 验证边缘服务</h2>
+<p>启动用户微服务和Edge服务，使用<a href="https://www.getpostman.com/">Postman</a>注册一个用户：</p>
+
+<p><img src="/assets/images/scaffold/LogonViaEdge.png" alt="LogonViaEdge" /></p>
+
+<p>成功，现在我们使用新注册的用户名<code class="highlighter-rouge">ldg</code>登录：</p>
+
+<p><img src="/assets/images/scaffold/LoginViaEdge.png" alt="LoginViaEdge" /></p>
+
+<p>同样成功，并在Response中已经包含了正确的<code class="highlighter-rouge">AUTHORIZATION</code>Header。</p>
+
+<h2 id="55-性能比拼">5.5 性能比拼</h2>
+<p>ServiceComb Java Chassis也支持集成Netflix Zuul作为网关服务，我们做了一次性能比较，使用ServiceComb Edge作为网关吞吐能力大幅优于Netflix Zuul，性能测试项目源代码在<a href="https://github.com/zhengyangyong/gateway-perf">这里</a>。</p>
+
+<h1 id="6-扩展边缘服务支持统一认证">6 扩展边缘服务支持统一认证</h1>
+<h2 id="61-设计思路">6.1 设计思路</h2>
+<p>正如前面提到的，统一认证的目的是在Edge入口处进行访问认证，避免需要在所有的微服务中都承载重复的认证机制，因此：</p>
+<ol>
+  <li>我们先要将认证功能作为一个独立的Procuder发布出来，使Edge服务能够随时认证Token，我们将其命名为<code class="highlighter-rouge">AuthenticationService</code>，放在用户服务中；</li>
+  <li>将无需认证的访问请求识别出来，包括：</li>
+</ol>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">功能</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">login</td>
+      <td style="text-align: left">登录验证，通过后为用户生成Token</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">logon</td>
+      <td style="text-align: left">新用户注册</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>除此之外其他业务请求都需要做Token认证；</p>
+
+<ol>
+  <li>Edge服务转发访问请求之前，对需要认证的请求先做统一认证，认证通过之后才转发，我们使用<code class="highlighter-rouge">HttpServerFilter</code>扩展这个能力：</li>
+</ol>
+
+<p><img src="/assets/images/scaffold/FilterChain.png" alt="FilterChain" /></p>
+
+<p>统一认证流程时序图为：</p>
+
+<p><img src="/assets/images/scaffold/EdgeAuth.png" alt="EdgeAuth" /></p>
+
+<h2 id="62-实现统一认证">6.2 实现统一认证</h2>
+<h5 id="第一步发布认证服务">第一步：发布认证服务</h5>
+<h6 id="定义authenticationservice">定义AuthenticationService</h6>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">AuthenticationService</span> <span class="o">{</span>
+  <span class="nc">String</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+<h6 id="实现并发布authenticationservice">实现并发布AuthenticationService</h6>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"authentication"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">AuthenticationServiceImpl</span> <span class="kd">implements</span> <span class="nc">AuthenticationService</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">TokenStore</span> <span class="n">tokenStore</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="kd">public</span> <span class="nf">AuthenticationServiceImpl</span><span class="o">(</span><span class="nc">TokenStore</span> <span class="n">tokenStore</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">tokenStore</span> <span class="o">=</span> <span class="n">tokenStore</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@GetMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"validate"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">String</span> <span class="n">userName</span> <span class="o">=</span> <span class="n">tokenStore</span><span class="o">.</span><span class="na">validate</span><span class="o">(</span><span class="n">token</span><span class="o">);</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">userName</span> <span class="o">==</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"incorrect token"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="n">userName</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h5 id="第二步实现统一认证authenticationfilter">第二步：实现统一认证AuthenticationFilter</h5>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">AuthenticationFilter</span> <span class="kd">implements</span> <span class="nc">HttpServerFilter</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">RestTemplate</span> <span class="n">template</span> <span class="o">=</span> <span class="nc">RestTemplateBuilder</span><span class="o">.</span><span class="na">create</span><span class="o">();</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">USER_SERVICE_NAME</span> <span class="o">=</span> <span class="s">"user-service"</span><span class="o">;</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">EDGE_AUTHENTICATION_NAME</span> <span class="o">=</span> <span class="s">"edge-authentication-name"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Set</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="no">NOT_REQUIRED_VERIFICATION_USER_SERVICE_METHODS</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HashSet</span><span class="o">&lt;&gt;(</span>
+      <span class="nc">Arrays</span><span class="o">.</span><span class="na">asList</span><span class="o">(</span><span class="s">"login"</span><span class="o">,</span> <span class="s">"logon"</span><span class="o">,</span> <span class="s">"validate"</span><span class="o">));</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">int</span> <span class="nf">getOrder</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">Response</span> <span class="nf">afterReceiveRequest</span><span class="o">(</span><span class="nc">Invocation</span> <span class="n">invocation</span><span class="o">,</span> <span class="nc">HttpServletRequestEx</span> <span class="n">httpServletRequestEx</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">isInvocationNeedValidate</span><span class="o">(</span><span class="n">invocation</span><span class="o">.</span><span class="na">getMicroserviceName</span><span class="o">(),</span> <span class="n">invocation</span><span class="o">.</span><span class="na">getOperationName</span><span class="o">()))</span> <span class="o">{</span>
+      <span class="nc">String</span> <span class="n">token</span> <span class="o">=</span> <span class="n">httpServletRequestEx</span><span class="o">.</span><span class="na">getHeader</span><span class="o">(</span><span class="no">AUTHORIZATION</span><span class="o">);</span>
+      <span class="k">if</span> <span class="o">(</span><span class="nc">StringUtils</span><span class="o">.</span><span class="na">isNotEmpty</span><span class="o">(</span><span class="n">token</span><span class="o">))</span> <span class="o">{</span>
+        <span class="nc">String</span> <span class="n">userName</span> <span class="o">=</span> <span class="n">template</span>
+            <span class="o">.</span><span class="na">getForObject</span><span class="o">(</span><span class="s">"cse://"</span> <span class="o">+</span> <span class="no">USER_SERVICE_NAME</span> <span class="o">+</span> <span class="s">"/validate?token={token}"</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+        <span class="k">if</span> <span class="o">(</span><span class="nc">StringUtils</span><span class="o">.</span><span class="na">isNotEmpty</span><span class="o">(</span><span class="n">userName</span><span class="o">))</span> <span class="o">{</span>
+          <span class="c1">//Add header</span>
+          <span class="n">invocation</span><span class="o">.</span><span class="na">getContext</span><span class="o">().</span><span class="na">put</span><span class="o">(</span><span class="no">EDGE_AUTHENTICATION_NAME</span><span class="o">,</span> <span class="n">userName</span><span class="o">);</span>
+        <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+          <span class="k">return</span> <span class="nc">Response</span>
+              <span class="o">.</span><span class="na">failResp</span><span class="o">(</span><span class="k">new</span> <span class="nc">InvocationException</span><span class="o">(</span><span class="nc">Status</span><span class="o">.</span><span class="na">UNAUTHORIZED</span><span class="o">,</span> <span class="s">"authentication failed, invalid token"</span><span class="o">));</span>
+        <span class="o">}</span>
+      <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+        <span class="k">return</span> <span class="nc">Response</span><span class="o">.</span><span class="na">failResp</span><span class="o">(</span>
+            <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="nc">Status</span><span class="o">.</span><span class="na">UNAUTHORIZED</span><span class="o">,</span> <span class="s">"authentication failed, missing AUTHORIZATION header"</span><span class="o">));</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">boolean</span> <span class="nf">isInvocationNeedValidate</span><span class="o">(</span><span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span> <span class="nc">String</span> <span class="n">operationPath</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="no">USER_SERVICE_NAME</span><span class="o">.</span><span class="na">equals</span><span class="o">(</span><span class="n">serviceName</span><span class="o">))</span> <span class="o">{</span>
+      <span class="k">for</span> <span class="o">(</span><span class="nc">String</span> <span class="n">method</span> <span class="o">:</span> <span class="no">NOT_REQUIRED_VERIFICATION_USER_SERVICE_METHODS</span><span class="o">)</span> <span class="o">{</span>
+        <span class="k">if</span> <span class="o">(</span><span class="n">operationPath</span><span class="o">.</span><span class="na">startsWith</span><span class="o">(</span><span class="n">method</span><span class="o">))</span> <span class="o">{</span>
+          <span class="k">return</span> <span class="kc">false</span><span class="o">;</span>
+        <span class="o">}</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="kc">true</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>别忘了通过SPI机制加载它，在<code class="highlighter-rouge">resources\META-INF\services</code>目录中创建<code class="highlighter-rouge">org.apache.servicecomb.common.rest.filter.HttpServerFilter</code>文件：</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>org.apache.servicecomb.scaffold.edge.filter.AuthenticationFilter
+</code></pre></div></div>
+
+<h5 id="第三步在用户微服务中增加修改密码的功能用于验证">第三步：在用户微服务中增加修改密码的功能用于验证</h5>
+<p>现有的<code class="highlighter-rouge">login</code>和<code class="highlighter-rouge">logon</code>都无需认证，因此我们在用户微服务中增加需要认证的修改密码的功能用于验证统一认证。</p>
+<h6 id="在userservice中添加修改密码">在UserService中添加修改密码</h6>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">UserService</span> <span class="o">{</span>
+  <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">logon</span><span class="o">(</span><span class="nc">UserDTO</span> <span class="n">user</span><span class="o">);</span>
+
+  <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">login</span><span class="o">(</span><span class="nc">UserDTO</span> <span class="n">user</span><span class="o">);</span>
+  <span class="c1">//需要认证的修改密码功能</span>
+  <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">changePassword</span><span class="o">(</span><span class="nc">UserUpdateDTO</span> <span class="n">userUpdate</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h6 id="在userserviceimpl中实现修改密码">在UserServiceImpl中实现修改密码</h6>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Override</span>
+<span class="nd">@PostMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"changePassword"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">Boolean</span><span class="o">&gt;</span> <span class="nf">changePassword</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">UserUpdateDTO</span> <span class="n">userUpdate</span><span class="o">)</span> <span class="o">{</span>
+  <span class="k">if</span> <span class="o">(</span><span class="n">validateUserUpdate</span><span class="o">(</span><span class="n">userUpdate</span><span class="o">))</span> <span class="o">{</span>
+    <span class="nc">UserEntity</span> <span class="n">dbUser</span> <span class="o">=</span> <span class="n">repository</span><span class="o">.</span><span class="na">findByName</span><span class="o">(</span><span class="n">userUpdate</span><span class="o">.</span><span class="na">getName</span><span class="o">());</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">dbUser</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">if</span> <span class="o">(</span><span class="n">dbUser</span><span class="o">.</span><span class="na">getPassword</span><span class="o">().</span><span class="na">equals</span><span class="o">(</span><span class="n">userUpdate</span><span class="o">.</span><span class="na">getOldPassword</span><span class="o">()))</span> <span class="o">{</span>
+        <span class="n">dbUser</span><span class="o">.</span><span class="na">setPassword</span><span class="o">(</span><span class="n">userUpdate</span><span class="o">.</span><span class="na">getNewPassword</span><span class="o">());</span>
+        <span class="n">repository</span><span class="o">.</span><span class="na">save</span><span class="o">(</span><span class="n">dbUser</span><span class="o">);</span>
+        <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="kc">true</span><span class="o">,</span> <span class="nc">HttpStatus</span><span class="o">.</span><span class="na">OK</span><span class="o">);</span>
+      <span class="o">}</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"wrong password"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"user name not exist"</span><span class="o">);</span>
+  <span class="o">}</span>
+  <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="no">BAD_REQUEST</span><span class="o">,</span> <span class="s">"incorrect user"</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="63-验证实现的统一认证">6.3 验证实现的统一认证</h2>
+<h5 id="确认authenticationfilter在edge服务中成功加载">确认AuthenticationFilter在Edge服务中成功加载</h5>
+<p>在Edge服务的启动日志中能够找到：</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>2018-07-13 14:38:48,756 [INFO]   1. org.apache.servicecomb.scaffold.edge.filter.AuthenticationFilter. org.apache.servicecomb.foundation.common.utils.SPIServiceUtils.loadSortedService(SPIServiceUtils.java:79)
+</code></pre></div></div>
+
+<h5 id="用户登录">用户登录</h5>
+<p>使用zhengyangyong登录：</p>
+
+<p><img src="/assets/images/scaffold/LoginFirst.png" alt="LoginFirst" /></p>
+
+<p>拿到的Token值为：eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJ6aGVuZ3lhbmd5b25nIiwiZXhwIjoxNTMwNjA4OTczfQ.90teWUNbypPZvds_SD7Kus_y7wLc4b6VzC_aIVg8sLItKxwQ0g4V9BDU665PlqQY5KM-mnk8y0R6ENL1T8YVFg</p>
+
+<h5 id="不带authorization-header请求changepassword">不带Authorization Header请求changePassword</h5>
+
+<p><img src="/assets/images/scaffold/NoAuthHeader.png" alt="NoAuthHeader" /></p>
+
+<p>返回的失败信息是：authentication failed, missing AUTHORIZATION header</p>
+
+<h5 id="使用错误的token请求changepassword">使用错误的Token请求changePassword</h5>
+
+<p><img src="/assets/images/scaffold/ErrorAuthHeader.png" alt="ErrorAuthHeader" /></p>
+
+<p>返回的失败信息是：authentication failed : InvocationException: code=400;msg=CommonExceptionData [message=incorrect token]</p>
+
+<h5 id="使用正确的token请求changepassword">使用正确的Token请求changePassword</h5>
+
+<p><img src="/assets/images/scaffold/AuthSuccess.png" alt="AuthSuccess" /></p>
+
+<p>修改密码成功。</p>
+
+<p><strong>这里可能有疑问，使用zhengyangyong登录后，是可以通过这个Token修改其他用户例如lidagang的密码的，这是因为我们目前构建的validate仅检查Token的有效性，而不做权限检查，基于RBAC的角色权限管理系统将会在未来构建。</strong></p>
+
+<blockquote>
+  <p>提示：</p>
+  <ol>
+    <li>AuthenticationFilter的完整<a href="https://github.com/zhengyangyong/scaffold/blob/master/edge-service/src/main/java/org/apache/servicecomb/scaffold/edge/filter/AuthenticationFilter.java">代码</a>；</li>
+    <li>HttpServerFilter的<a href="https://github.com/apache/incubator-servicecomb-docs/blob/master/java-chassis-reference/zh_CN/general-development/http-filter.md">介绍</a>。</li>
+  </ol>
+</blockquote>
+
+<h1 id="7小结">7.小结</h1>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>本文详细介绍了如何使用http://start.servicecomb.io脚手架快速构建微服务项目、使用领域驱动设计（Domain-Driven Design，DDD）设计地产CRM系统、使用Edge Service构建统一认证边缘服务等内容。至此，一个地产客户关系管理系统的骨架已经初步搭建起来，剩下的模块，我们将在接下来的文章里详细介绍。
+</code></pre></div></div>
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content/cn/docs/customized-tracing-with-servicecomb/index.html

diff --git a/content/cn/docs/customized-tracing-with-servicecomb/index.html b/content/cn/docs/customized-tracing-with-servicecomb/index.html
new file mode 100644
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@@ -0,0 +1,908 @@
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+    <meta itemprop="headline" content="ServiceComb + Zipkin : 使用篇——自定义追踪">
+    <meta itemprop="description" content="本篇将介绍如何使用 ServiceComb 和 Zipkin 实现自定义追踪">
+    <meta itemprop="datePublished" content="January 23, 2019">
+    <meta itemprop="dateModified" content="January 23, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb + Zipkin : 使用篇——自定义追踪
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h1 id="自定义追踪功能">自定义追踪功能</h1>
+<p>ServiceComb 支持用户在程序中的指定位置处增加追踪数据，可以实现更细力度的追踪。</p>
+<h2 id="使用步骤">使用步骤</h2>
+<p>添加依赖</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>在程序入口或者配置处添加 <code class="highlighter-rouge">@EnableZipkinTracing</code> 注解</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.tracing.zipkin.EnableZipkinTracing</span><span class="o">;</span>
+
+<span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="nd">@EnableZipkinTracing</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">CalculatorApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>在服务程序中的调用方法处添加 <code class="highlighter-rouge">@Span</code> 注解</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.tracing.Span</span><span class="o">;</span>
+
+<span class="nd">@Service</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorServiceImpl</span> <span class="kd">implements</span> <span class="nc">CalculatorService</span> <span class="o">{</span>
+
+  <span class="cm">/**
+   * {@inheritDoc}
+   */</span>
+  <span class="nd">@Span</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">height</span> <span class="o">&lt;=</span> <span class="mi">0</span> <span class="o">||</span> <span class="n">weight</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Arguments must be above 0"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="kt">double</span> <span class="n">heightInMeter</span> <span class="o">=</span> <span class="n">height</span> <span class="o">/</span> <span class="mi">100</span><span class="o">;</span>
+    <span class="kt">double</span> <span class="n">bmi</span> <span class="o">=</span> <span class="n">weight</span> <span class="o">/</span> <span class="o">(</span><span class="n">heightInMeter</span> <span class="o">*</span> <span class="n">heightInMeter</span><span class="o">);</span>
+    <span class="k">return</span> <span class="nf">roundToOnePrecision</span><span class="o">(</span><span class="n">bmi</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">double</span> <span class="nf">roundToOnePrecision</span><span class="o">(</span><span class="kt">double</span> <span class="n">value</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">BigDecimal</span><span class="o">(</span><span class="n">value</span><span class="o">).</span><span class="na">setScale</span><span class="o">(</span><span class="mi">1</span><span class="o">,</span> <span class="nc">RoundingMode</span><span class="o">.</span><span class="na">HALF_UP</span><span class="o">).</span><span class="na">doubleValue</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+<p>使用限制：自定义跟踪仅支持注解请求线程中的方法调用，且带有<code class="highlighter-rouge">@Span</code>的类必须是spring管理的bean。</p>
+<h2 id="快速演示">快速演示</h2>
+<p>下面使用java-chassis/samples/bmi 程序演示，如何使用自定义追踪功能定位应用程序中的问题？</p>
+<ol>
+  <li>正常运行bmi程序，结果如下<br />
+ <img src="/assets/images/zipkin/demo-bmi-run.png" alt="正常结果" />
+ <img src="/assets/images/zipkin/zipkin-track-bmi.png" alt="zipkin正常追踪结果" /></li>
+  <li>在bmi程序的calculator服务的calculate方法处，增加一块进程休眠代码（模拟实际工作中调用当前线程处理其他业务的情景），如下
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">)</span> <span class="o">{</span>
+
+     <span class="k">try</span><span class="o">{</span>
+     <span class="nc">Thread</span><span class="o">.</span><span class="na">currentThread</span><span class="o">().</span><span class="na">sleep</span><span class="o">(</span><span class="mi">5000</span><span class="o">);</span>
+     <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">Exception</span> <span class="n">e</span><span class="o">){</span>
+
+     <span class="o">}</span>
+
+     <span class="k">if</span> <span class="o">(</span><span class="n">height</span> <span class="o">&lt;=</span> <span class="mi">0</span> <span class="o">||</span> <span class="n">weight</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+       <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Arguments must be above 0"</span><span class="o">);</span>
+     <span class="o">}</span>
+     <span class="kt">double</span> <span class="n">heightInMeter</span> <span class="o">=</span> <span class="n">height</span> <span class="o">/</span> <span class="mi">100</span><span class="o">;</span>
+     <span class="kt">double</span> <span class="n">bmi</span> <span class="o">=</span> <span class="n">weight</span> <span class="o">/</span> <span class="o">(</span><span class="n">heightInMeter</span> <span class="o">*</span> <span class="n">heightInMeter</span><span class="o">);</span>
+     <span class="k">return</span> <span class="nf">roundToOnePrecision</span><span class="o">(</span><span class="n">bmi</span><span class="o">);</span>
+   <span class="o">}</span>
+
+</code></pre></div>    </div>
+  </li>
+  <li>运行bmi程序，出现如下异常结果。查看zipkin追踪情况和程序报错信息，可以初步确定问题由 bmi/calculator 服务超时未响应导致<br />
+ <img src="/assets/images/zipkin/demo-bmi-run-error.png" alt="异常结果" />     	
+ <img src="/assets/images/zipkin/zipkin-track-bmi-error.png" alt="zipkin追踪情况" />
+ <img src="/assets/images/zipkin/error-message.png" alt="程序报错信息" /></li>
+  <li>使用自定义追踪功能，定位问题具体位置
+ 在calculator服务中配置自定义追踪功能，添加注解 <code class="highlighter-rouge">@Span</code>在calculator服务的方法上 。运行bmi程序，zipkin追踪耗时情况如下。根据span占用的时间戳，可以确定延时问题出现在calculate方法处，点击span，可查看call.path 获取calculate方法的具体位置。
+ <img src="/assets/images/zipkin/zipkin-customized-track-bmi.png" alt="zipkin追踪异常情况" />
+ <img src="/assets/images/zipkin/zipkin-track-span.png" alt="span信息信息" />
+    <h2 id="总结">总结</h2>
+    <p>从上面的示例可以看出，通过配置ServiceComb的自定义追踪功能，可以实现对服务中调用方法、接口的追踪，实现更细力度化的追踪。这对于我们监控服务内部调用、定位服务中的延时问题等非常有帮助。</p>
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+    <meta itemprop="headline" content="基于服务的分布式事务(上篇)">
+    <meta itemprop="description" content="本文从分布式事务需要解决的问题入手，向大家介绍了建立在补充基础之上的基于服务的分布式事务的解决思路。接下来我们结合具体的示例介绍了完美的补偿（TCC）和非完美补偿（Saga）两种分布式事务协调协议，最后结合ServiceComb Pack的实现原理详细介绍了ServiceComb Pack的架构实现。">
+    <meta itemprop="datePublished" content="January 10, 2019">
+    <meta itemprop="dateModified" content="January 10, 2019">
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+          <header>
+            <h1 class="page__title" itemprop="headline">基于服务的分布式事务(上篇)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
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+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h3 id="传统数据库事务">传统数据库事务</h3>
+
+<p>在传统单体应用架构下，我们通常会将业务数据存储在一个数据库中，应用各模块直接对数据库进行操作业务数据。由数据库提供基于<a href="https://en.wikipedia.org/wiki/ACID">ACID</a>的事务保证，这里的A是Atomic原子性的简称（事务作为整体来执行，要么全部执行，要么都不执行）； C是Consistency一致性的简称（事务应确保数据从一个一致的状态转变为另一个一致的状态）；I是 Isolation 隔离性的简称 （多个事务并发执行时，一个事务的执行不应影响其他事务的执行）； D是Durability持久性的简称（已提交的事务修改数据会被持久保持）。</p>
+
+<p>例如一个电商的下单操作，就涉及到用户系统，库存系统，支付系统以及配送系统一系列的协同操作。我们在执行下单操作的过程中，如果出现库存短缺，或者用户账户余额不足的情况，这个下单操作涉及到一系列的业务系统调用。如果这些子系统连接的一个数据库，我们可以通过数据库提供的事务原子性机制将库存数量校验以及用户余额校验的工作，和执行具体的下单业务操作组合成为一个数据库事务操作。通过数据库事务原子性来保证系统各个模块的调用要么都成功，要么都失败（取消）。 同时由于数据库提供一致性，和持久性保证，保证了如果事务执行成功并提交，本次业务操作的数据是立即生效的同时不会产生异议。 同时数据库提供了不同级别的数据锁机制保证应用多个线程同时读取或者更新数据的过程中不会相互影响，从而来保证业务操作的隔离性。</p>
+
+<h3 id="微服务的分布式事务">微服务的分布式事务</h3>
+
+<p>随着微服务架构的流行，很多大型的业务流程被拆分成为了多个功能单一的基础服务，大家会根据业务的述求在这些基础服务之上编写一些组合调用服务以满足业务述求。 为了保证微服务能够独立开发部署运行， 通常我们会采用一个微服务一个数据库的架构，将内部数据经微服务封装之后，以服务方式对外暴露。 这样以往基于数据库来实现的数据操作，就变成了多个对外提供服务的微服务系统的协同完成操作。因为单个微服务只知道自己的服务执行情况，为了保证分布事务的一致性，参与分布式事务的微服务通常会依托协调器完成相关的<a href="https://www.enterpriseintegrationpatterns.com/patterns/conversation/CoordinatedAgreement.html">一致性协调操作</a>。</p>
+
+<p>在十多年前分布式事务的实现方案有 CORBA的 Object Transaction Service（OTS), J2EE的 Java Transaction API 以及 Java Transaction Service。这些事务管理以及事务服务的技术都是建立在<a href="https://en.wikipedia.org/wiki/ACID">ACID</a>事务的概念上的。协调器依托于底层的资源交互协议实现资源的占用以及提交的操作，通过<a href="https://zh.wikipedia.org/wiki/%E4%BA%8C%E9%98%B6%E6%AE%B5%E6%8F%90%E4%BA%A4">两阶段提交</a>的方式实现分布式事务的强一致操作。两阶段提交将分布式事务操作分为准备和提交两个阶段：系统在准备解决阶段完成资源操作， 如果准备阶段中出现问题，支持回滚操作，但是在提交阶段是不允许出错的。两阶段在保证事务原子性上做了很多工作，但是两阶段提交的最大的问题是在分布式事务执行过程中， 所有参与事务的节点资源都是被锁定的, 系统不允许其他节点访问锁定的资源，在这种执行下很难进一步提升系统的执行效率。</p>
+
+<p>如前文所述在<a href="https://en.wikipedia.org/wiki/ACID">ACID</a>的事务执行过程中，为了保证事务的隔离性，通常我们会采用读写加锁的方式，通过串行处理数据方式，保证多个事务在同时执行的过程中不会相互影响。也就是说只有当事务提交并且保存修改记录或者回退取消修改记录之后，其他的事务才能继续执行。然后对于由多个事务组成的长时间运行的事务来说，如果在整个事务的执行过程都采用这锁机制来保证事务的隔离性是一种很低效的解决方案。</p>
+
+<p>那我们有什么办法即提高系统运行效率，又能保证事务的数据一致性呢？这里的答案是采用补偿的方式来解决这一问题。</p>
+
+<h3 id="基于补偿的事务实现">基于补偿的事务实现</h3>
+
+<p>补偿是指我们将一个事务分成一个本地执行的正常操作事务和一个逻辑上对之前的操作进行补偿的事务。这样采用补偿事务的方式，我们可以把一个长时间运行的事务变成了若干个可以立即提交的本地事务调用，而不是一个长时间占用锁资源的巨型事务。 这样做的最大好处就是极大降低锁占用的时间。作为代价，补偿方式的取消操作和以往的实现方式有很大的不同，我们需要执行一个单独的<a href="https://en.wikipedia.org/wiki/ACID">ACID</a>事务来完成对之前已提交的事务的逻辑补偿。</p>
+
+<p>下图展示了一个典型的分布式事务调用， 用户请求触发事务初始服务， 事务初始服务会顺序调用两个事务参与服务（服务A，服务B）。由于这两个事务参与服务之间没有联系，当事务参与服务执行出现了问题，需要一个协调器参与相关的恢复操作。</p>
+
+<p><img src="/assets/images/dts1/image-distributed-transaction.png" alt="" /></p>
+
+<p>这里我们可以根据补偿执行的不同将其分成两组不同的补偿方式：</p>
+
+<ol>
+  <li>不完美补偿 - 反向操作会留下之前原始事务操作的痕迹，一般来说我们是会在原始事务记录中设置取消状态。</li>
+  <li>完美补偿 - 反向逻辑会彻底清理之前的原始事务操作，一般来说是不会保留原始事务交易记录，用户是感知不到事务取消之前的状态信息的。</li>
+</ol>
+
+<p>对于采用不完美的补偿方式的系统（<a href="https://microservices.io/patterns/data/saga.html">Saga</a>实现）来说，我们的补偿事务逻辑其他的事务逻辑相比没有什么不同， 系统只需要像执行其他业务逻辑一样执行相关的补偿操作即可。系统不需要设置特殊的处理逻辑来恢复事务执行之前的状态。以我们常见的银行ATM取款业务为例，银行账户预先进行扣减的操作，如果取款不成功，其逻辑恢复操作就是通过冲正的方式将预先扣减的款项打回到用户账户，我们可以通过查看账户的交易记录找到扣减和冲正的记录信息。下图展示的内容就是当初始服务调用分别调用服务A和服务B，服务B执行出现错误，这个时候我们事务协调器会调用服务A的冲正方法将系统状态恢复到执行服务调用之前的状态。</p>
+
+<p>对于采用完美补偿方式的系统（<a href="https://dzone.com/articles/transactions-for-the-rest-of-us">Try-Cancel/Confirm</a>实现)来说，为了让系统能够在补偿操作彻底清除事务执行的情况，我们会借助两阶段提交协议来完成这部分的功能。在TCC方式下，cancel补偿显然是在第二阶段需要执行业务逻辑来取消第一阶段产生的后果。try是在第一阶段执行相关的业务操作，完成相关业务资源的占用，例如预先分配票务资源，或者检查并刷新用户账户信用额度。 在cancel阶段释放相关的业务资源，例如释放预先分配的票务资源或者恢复之前占用的用户信用额度。 那我们为什么还要加入confirm操作呢？这需要从业务资源的使用生命周期来入手。在try过程中，我们只是占用的业务资源，相关的执行操作只是出于待定状态，只有在确认操作执行完毕之后，业务资源才能真正被确认。例如订票业务的try操作，我们只是占用了相关的票务资源。目的是防止票务资源被其他用户占用，但是业务还没有执行完毕，票务提供方还不能将被占用的票务资源统计为已售出票务。 只有相关票务资源被确认售出的之后，票务提供方才能将其统计为已售出票务资源。</p>
+
+<h3 id="servicecomb-pack架构介绍">ServiceComb Pack架构介绍</h3>
+
+<p>通过上面的分析我们可以发现一个有意思的现象，每一步事务的操作都有可能会根据业务的执行情况提供一个补偿操作，通过一个事务管理系统来协调这个补偿操作可以帮我们大大降低业务流程建模的复杂度。在分布式事务实现过程中， 协调器的作用非常重要， 各个事务的参与方需要跟协调器建立好良好的沟通， 由协调器统一调度完成相关事务的执行或者取消的操作。</p>
+
+<p>ServiceComb Pack架构如下图所示，主要包含两个组件，即Alpha和Omega，其中：</p>
+
+<ul>
+  <li>Alpha充当协调者的角色，主要负责对事务的事件进行持久化存储以及协调子事务的状态，使其最终得以与全局事务的状态保持一致，即保证事务中的子事务要么全执行，要么全不执行。</li>
+  <li>Omega是微服务中内嵌的一个agent，负责对监控本地事务执行情况并向Alpha上报事务执行事件，并在异常情况下根据alpha下发的指令执行相应的补偿或重试操作。</li>
+</ul>
+
+<p><img src="/assets/images/dts1/image-pack.png" alt="" /></p>
+
+<p>Omega可以通过向alpha发送消息的方式向alpha实时传递事务执行的进展， 但是Alpha怎么知道这些Omega上传的消息是相互关联的呢？我们通过在服务调用过程中插入唯一的全局事务ID，并在后续的调用其它服务过程中传递这个全局事务ID。通过全局事务ID可以从汇总到Alpha事件中找到事件与之相关联的所有事件，通过对这些事件信息进行分析，我们可以完整地追踪到与分布式事务执行情况。</p>
+
+<p><img src="/assets/images/dts1/image-transactions-correlation.png" alt="" /></p>
+
+<p>Omega会以切面编程的方式向应用程序注入相关的处理模块，帮助我们构建分布式事务调用的上下文。 Omega在事务处理初始阶段处理事务的相关准备的操作，在事务执行完毕做一些清理的操作，例如创建分布式事务起始事件，以及相关的子事件， 根据事务的执行的成功或者失败生产相关的事务终止或者失败事件。这样带来的好处是用户的代码只需要添加几个annotation 来描述分布式事务执行范围，以及与本地的事务处理恢复的相关函数信息，Omega就能通过切面注入的代码能够追踪与本地事务的执行情况。 Omega会将本地事务执行的情况以事件的方式通知给Alpha。 由于单个Omega不可能知晓一个分布式事务下其他参与服务的执行情况， 这样就需要Alpha扮演一个十分重要的协调者的角色。Alpha将收集到的分布式事务事件信息整理汇总，通过分析这些事件之间的关系可以了解到分布式事务的执行情况， Alpha通过向Omega下发相关的执行指令由Omega执行相关提交或恢复操作，实现分布式事务的最终一致性。</p>
+
+<p><img src="/assets/images/dts1/image-Omega-Implementation.png" alt="" /></p>
+
+<p>在了解的Pack实现的部分细节之后， 我们可以从下图进一步了解ServiceComb Pack架构下，Alpha与Omega内部各模块之间的关系图。</p>
+
+<p><img src="/assets/images/dts1/image-pack-system-archecture.png" alt="" /></p>
+
+<p>整个架构分为三个部分，一个是<strong>Alpha协调器</strong>（支持多个实例提供高可用支持），另外一个就是注入到微服务实例中的<strong>Omega</strong>，以及Alpha与Omega之间的<strong>交互协议</strong>， 目前ServiceComb Pack支持Saga 以及TCC两种分布式事务协调协议实现。</p>
+
+<p>Omega包含了与分析用户分布式事务逻辑相关的 <strong>事务注解模块</strong>（Transaction Annotation） 以及 事务拦截器（Transaction Interceptor）； 分布式事务执行相关的<strong>事务上下文</strong>（Transaction Context），<strong>事务回调</strong>（Transaction Callback) ，<strong>事务执行器</strong> （Transaction Executor）；以及负责与Alpha进行通讯的<strong>事务传输</strong>（Transaction Transport）模块。</p>
+
+<p><strong>事务注解</strong>模块是分布式事务的用户界面，用户将这些标注添加到自己的业务代码之上用以描述与分布式事务相关的信息，这样Omega就可以按照分布式事务的协调要求进行相关的处理。如果大家扩展自己的分布式事务，也可以通过定义自己的事务标注来实现。</p>
+
+<p><strong>事务拦截器</strong>这个模块我们可以借助AOP手段，在用户标注的代码基础上添加相关的拦截代码，获取到与分布式事务以及本地事务执行相关的信息，并借助<strong>事务传输</strong>模块与Alpha进行通讯传递事件。</p>
+
+<p><strong>事务上下文</strong>为Omega内部提供了一个传递事务调用信息的一个手段，借助前面提到的全局事务ID以及本地事务ID的对应关系，Alpha可以很容易检索到与一个分布式事务相关的所有本地事务事件信息。</p>
+
+<p><strong>事务执行器</strong>主要是为了处理事务调用超时设计的模块。由于Alpha与Omega之间的连接有可能不可靠，Alpha端很难判断Omega本地事务执行超时是由Alpha与Omega直接的网络引起的还是Omega自身调用的问题，因此设计了事务执行器来监控Omega的本地的执行情况，简化Omega的超时操作。目前Omega的缺省实现是直接调用事务方法，由Alpha的后台服务通过扫描事件表的方式来确定事务执行时间是否超时。</p>
+
+<p><strong>事务回调</strong> 在Omega与Alpha建立连接的时候就会向Alpha进行注册，当Alpha需要进行相关的协调操作的时候，会直接调用Omega注册的回调方法进行通信。 由于微服务实例在云化场景启停会很频繁，我们不能假设Alpha一直能找到原有注册上的事务回调， 因此我们建议微服务实例是无状态的，这样Alpha只需要根据服务名就能找到对应的Omega进行通信。</p>
+
+<p><strong>事务传输模块</strong>负责Omega与Alpha之间的通讯，在具体的实现过程中，Pack通过定义相关的Grpc<a href="https://github.com/apache/servicecomb-pack/tree/master/pack-contracts/pack-contract-grpc/src/main/proto">描述接口文件</a>定义了TCC 以及Saga的事务交互方法， 同时也定义了与交互相关的事件。我们借助了Grpc所提供的双向流操作接口实现了Omega与Alpha之间的相互调用。 Omega和Alpha的传输建立在Grpc多语言支持的基础上，为实现多语言版本的Omega奠定了基础。</p>
+
+<p>Alpha为了实现其事务协调的功能，首先需要通过<strong>事务传输</strong>（Transaction Transport）接收Omega上传的事件， 并将事件存在<strong>事件存储</strong>（Event Store）模块中，Alpha通过<strong>事件API</strong> (Event API）对外提供事件查询服务。Alpha会通过<strong>事件扫描器</strong>（Event Scanner）对分布式事务的执行事件信息进行扫描分析，识别超时的事务，并向Omega发送相关的指令来完成事务协调的工作。由于Alpha协调是采用多个实例的方式对外提供高可用架构， 这就需要<strong>Alpha集群管理器</strong>（Alpha Cluster Manger）来管理Alpha集群实例之前的协调。用户可以通过<strong>管理终端</strong>（Manage console）对分布式事务的执行情况进行监控。</p>
+
+<p>目前Alpha的<strong>事件存储</strong>是构建在数据库基础之上的。为了降低系统实现的复杂程度，Alpha集群的高可用架构是建立在数据库集群基础之上的。 为了提高数据库的查询效率，我们会根据事件的全局事务执行情况的装将数据存储分成了在线库以及存档库，将未完成的分布式事务事件存储在在线库中， 将已经完成的分布式事务事件存储在存档库中。</p>
+
+<p><strong>事件API</strong>是Alpha对外暴露的Restful事件查询服务。 这模块功能首先应用在<a href="https://github.com/apache/servicecomb-pack/tree/master/acceptance-tests">Pack的验收测试</a>中，通过事件API验收测试代码可以很方便的了解Alpha内部接收的事件。验收测试通过模拟各种分布式事务执行异常情况（错误或者超时），比对Alpha接收到的事务事件来验证相关的其事务协调功能是否正确。</p>
+
+<p><strong>管理终端</strong>是一个js的前端界面， <strong>管理终端</strong>通过访问<strong>事件API</strong>提供的Rest服务，向用户提供是分布式事务执行情况的统计分析，并且可以追踪单个全局事务的执行情况，找出事务的失败的根源。在Pack 0.3.0 中实现了一部分功能，后续还需要进一步完善，欢迎大家参与进来。</p>
+
+<p><strong>Alpha集群管理器</strong>负责Alpha实例注册工作，管理Alpha中单个服务的执行情况， 并且为Omega提供一个及时更新的服务列表。 通过集群管理器用户可以轻松实现Alpha服务实例的启停操作，以及Alpha服务实例的滚动升级功能。目前这部分的模块还在设计开发中，欢迎对此有兴趣的朋友加入到我们的开发队伍中来。</p>
+
+<h3 id="小结">小结</h3>
+
+<p>本文从分布式事务需要解决的问题入手，向大家介绍了建立在补充基础之上的基于服务的分布式事务的解决思路。接下来我们结合具体的示例介绍了完美的补偿（TCC）和非完美补偿（Saga）两种分布式事务协调协议，最后结合ServiceComb Pack的实现原理详细介绍了ServiceComb Pack的架构实现。</p>
+
+<p><a href="../distributed-transaction-of-services-2/">基于服务的分布式事务下篇</a>中，我们结合具体的示例向大家介绍TCC以及Saga分布式事务协调协议的交互细节，以及如何使用ServiceComb Pack编写TCC 以及Saga 应用。</p>
+
+        
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+    <meta itemprop="headline" content="基于服务的分布式事务(下篇)">
+    <meta itemprop="description" content="在本文中我们先从分布式事务场景入手，采用交互图的方式，向大家介绍分布式Saga以及TCC分布式事务协调协议交互，最后结合ServiceComb Pack所提供的示例向大家介绍如何编写Saga以及TCC的应用代码。">
+    <meta itemprop="datePublished" content="January 10, 2019">
+    <meta itemprop="dateModified" content="January 10, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">基于服务的分布式事务(下篇)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h3 id="分布式事务协调场景介绍">分布式事务协调场景介绍</h3>
+
+<p>在基于服务的分布式事务上篇中， 我们举了了一个业务场景，就是一个初始服务创建了一个分布式事务，在这个分布式事务包含了两个参与服务的本地事务，这两个本地事务由初始服务通过调用两个参与事务的服务方式组合在一起。根据分布式事务一致性的要求，这两个本地事务要么同时成功，要么同时失败。 由于这两个参与事务的服务并不知道对方的存在，当一个参与服务调用（Invocation A）成功而另外一个参与服务调用（Invocation B）失败，我们就需要分布式事务协调器的进行相关的补偿，保证分布式事务的一致性。</p>
+
+<p><img src="/assets/images/dts2/image2-DT-introduction.png" alt="" /></p>
+
+<h3 id="分布式saga">分布式Saga</h3>
+
+<p><a href="https://github.com/apache/servicecomb-pack">ServiceComb Pack</a>目默认采⽤用的是名为Saga分布式事务协调方案。<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Sagas</a>这个概念来源于三十多年前的一篇数据库论文，一个Saga事务是一个有多个短时事务组成的长时的事务。 在分布式事务场景下，我们把一个Saga分布式事务看做是一个由多个本地事务组成的事务，每个本地事务都有一个与之对应的补偿事务。在Saga事务的执行过程中，如果出现某一步执行出现异常的，Saga事务会被终止，同时会调用之前执行成功的事务对应的补偿事务完成相关的恢复操作，这样保证Saga相关的本地事务要么同时成功，要么通过执行补偿恢复成为Saga执行之前的状态。</p>
+
+<p><img src="/assets/images/dts2/image2-saga-introduction.png" alt="" /></p>
+
+<p><a href="https://github.com/apache/servicecomb-pack">ServiceComb Pack</a> 在实现分布式Saga协调协议的过程中需要追踪分布式事务的执行情况。首先介绍一下正常流程下分布式事务执行流程是如何记录下来的 ，下图的红线部分是Omega端与Alpha端交互序列图，蓝色部分原有服务直接的调用。在分布式事务初始阶段由初始服务的Omega将<strong>SagaStarted</strong>事件到Alpha进行进行分布式事务备案。当有新的服务参与到这个分布式事务中，参与服务的Omega会在本地事务执行前发送<strong>TxStarted</strong>到Alpha端； 并在本地事务执行成功之后将<strong>TxEnded</strong>事件发送到Alpha。如果分布式事务正常结束，初始服务Omega会直接发送<strong>SagaEnded</strong>事件到Alpha结束整个分布式事务。</p>
+
+<p><img src="/assets/images/dts2/image2-saga-sq1.png" alt="" /></p>
+
+<p>参与分布式事务的服务在执行本地事务出现异常，如下图所示Transaction B执行出现错误。这个时候参与服务B会向Alpha发送一个<strong>TxAborted</strong>的事件，Alpha收到这个事件后会将整个Saga事务挂起，终止Saga事务的继续执行。如果这个时候还有其他的Omega向Alpha发送挂载在这个Saga事务下的<strong>TxStarted</strong>事件的话，Alpha会直接发送拒绝应答消息通知Omega这个Saga事务已经出现异常，Omega收到应答之后会抛出异常拒绝执行新的本地事务。由于初始服务在调用参与服务B的过程中，通过服务B的应答消息也知道了服务调用失败的消息，初始服务也会发生<strong>SagaAborted</strong>事件至Alpha来关闭整个Saga事件。虽然在<strong>TxAborted</strong>存在的情况下，<strong>SagaAborted</strong>事件看上去有点多余，但是为了应对诸如初始服务无法调用参与服务B的情况下（这个时候Alpha没有收到<strong>TxAborted</strong>事件），设置<strong>SagaAborted</strong>事件还是非常有必要的。</p>
+
+<p><img src="/assets/images/dts2/image2-saga-exception.png" alt="" /></p>
+
+<p>现在Alpha可以通过查询<strong>TxEnded</strong>事件可以获取到需要进行补偿恢复的服务信息，Alpha会向相关的服务实例Omega发送<strong>TxCompensated</strong>事件，由Omega调用服务实例补偿方法进行相关的恢复操作。为了恢复本地事务执行上下文，ServiceComb Pack会将<strong>TxStarted</strong>传递过来的方法参数列表信息放入<strong>TxCompensated</strong>消息中传递给Omega，除此之外ServiceComb Pack 还会将<a href="[OmegaContext](https://github.com/apache/servicecomb-packblob/master/omega/omega-context/src/main/java/org/apache/servicecomb/saga/omega/context/OmegaContext.java)">OmegaContext</a>的全局事务ID和本地事务ID设置成本地事务执行时的状态。用户可以在应用代码可以通过获取这些ID在分布式缓存或者数据库中检索获取自定义的上下文环境。</p>
+
+<p><img src="/assets/images/dts2/image2-saga-exception2.png" alt="" /></p>
+
+<p>除了要考虑异常情况，我们还需要考虑事务执行超时的处理的问题（为了简化场景，这里我们不考虑由于网络连接中断导致的事务异常或者结束消息丢包的情况）。目前我们可以在saga事务以及本地事务设置执行超时时间，Alpha上的事件扫描器会定时查找Started事件在设定的超时时间内是否有对应的Aborted或者Ended事件，如果没有，Alpha事件扫描器则会生成对应的Aborted时间触发相关的补偿操作。</p>
+
+<p>当整个saga事务执行超时，Alpha事件扫描器会在后台数据库中添加<strong>SagaAborted</strong>事件终止整个Saga事务，并且调用Omega注册的恢复函数进行相关的恢复操作。</p>
+
+<p><img src="/assets/images/dts2/image2-saga-timeout-2.png" alt="" /></p>
+
+<p>下图展示的是在本地事务执行超时的情况下，Alpha事件扫描器会识别出Transaction B 执行超时，同时会发生<strong>TxAborted</strong>事件终止整个Saga 事务，调用相关的恢复方法进行恢复。由于Alpha无法确认对应的本地事务的执行情况，Alpha会采用向Omega发送<strong>TxCompensated</strong>的方式强制恢复事务，即使这时参与的服务B的本地事务已经执行成功了，Alpha还是会调用参与服务B的Omega来执行相关的恢复操作。</p>
+
+<p><img src="/assets/images/dts2/image2-saga-timeout.png" alt="" /></p>
+
+<h3 id="编写saga应用代码">编写Saga应用代码</h3>
+
+<p>在文章开头我们给大家介绍了一个典型的分布式事务业务场景，其中涉及到一个初始服务，以及两个参与服务。 为了方便大家理解，我们将以<a href="https://github.com/apache/servicecomb-pack/tree/master/demo/saga-spring-demo">ServiceComb Pack Spring Demo</a>为例介绍如何使用Saga实现分布式事务。这里预订服务(Booking) 相当于之前提到的分布式事务初始服务，对外提供一个租车(Car)和酒店(Hotel)聚合服务，在<a href="https://github.com/apache/servicecomb-pack/blob/master/demo/saga-spring-demo/booking/src/main/java/org/apache/servicecomb/pack/demo/booking/BookingController.java">BookingController</a> 中使用Spring提供的<a href="https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/client/RestTemplate.html">RestTemplate</a> 向租车和酒店服务转发请求。租车和酒店服务分别作为Saga事务参与方参与整个事务。预订服务，租车和酒店服务都是基于<a href="https://spring.io/projects/spring-boot">Spring-Boot</a>编写独立进程应用，应用代码通过<a href="https://github.com/apache/servicecomb-pack/blob/master/omega/omega-spring-starter/src/main/java/org/apache/servicecomb/pack/omega/spring/EnableOmega.java">@EnableOmega</a>加载Omega相关的<a href="https://github.com/apache/servicecomb-pack/blob/master/demo/saga-spring-demo/booking/src/main/resources/application.yaml">配置</a>，同时需要在Spring的配置文件中配置与Alpha服务相关的信息。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.spring.EnableOmega</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
+
+<span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableOmega</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">Application</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>在应用代码中需要描述出Saga事务的边界，我们可以在BookingController的 order方法上标准@SagaStart；</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.context.annotations.SagaStart</span><span class="o">;</span>
+
+<span class="nd">@SagaStart</span>
+<span class="nd">@PostMapping</span><span class="o">(</span><span class="s">"/booking/{name}/{rooms}/{cars}"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="nc">String</span> <span class="nf">order</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">name</span><span class="o">,</span>  <span class="nd">@PathVariable</span> <span class="nc">Integer</span> <span class="n">rooms</span><span class="o">,</span> <span class="nd">@PathVariable</span> <span class="nc">Integer</span> <span class="n">cars</span><span class="o">)</span> <span class="o">{</span>
+  <span class="c1">// Calling the car service</span>
+  <span class="n">template</span><span class="o">.</span><span class="na">postForEntity</span><span class="o">(</span>
+      <span class="n">carServiceUrl</span> <span class="o">+</span> <span class="s">"/order/{name}/{cars}"</span><span class="o">,</span>
+      <span class="kc">null</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">name</span><span class="o">,</span> <span class="n">cars</span><span class="o">);</span>
+  <span class="c1">// Calling the hotel service</span>
+  <span class="n">template</span><span class="o">.</span><span class="na">postForEntity</span><span class="o">(</span>
+      <span class="n">hotelServiceUrl</span> <span class="o">+</span> <span class="s">"/order/{name}/{rooms}"</span><span class="o">,</span>
+      <span class="kc">null</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">name</span><span class="o">,</span> <span class="n">rooms</span><span class="o">);</span>
+  <span class="k">return</span> <span class="n">name</span> <span class="o">+</span> <span class="s">" booking "</span> <span class="o">+</span> <span class="n">rooms</span> <span class="o">+</span> <span class="s">" rooms and "</span> <span class="o">+</span> <span class="n">cars</span> <span class="o">+</span> <span class="s">" cars OK"</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>本地事务是通过@Compensable来标识， 并且在Compensable的compensationMethod属性中描述补偿方法。 注意补偿方法和本地事务方法的参数必须一致，否则Omega在系统启动进行参数检查的时候报找不到恢复方法的错误。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.transaction.annotations.Compensable</span><span class="o">;</span>
+
+<span class="nd">@Compensable</span><span class="o">(</span><span class="n">compensationMethod</span> <span class="o">=</span> <span class="s">"cancel"</span><span class="o">)</span>
+<span class="kt">void</span> <span class="nf">order</span><span class="o">(</span><span class="nc">CarBooking</span> <span class="n">booking</span><span class="o">)</span> <span class="o">{</span>
+  <span class="n">booking</span><span class="o">.</span><span class="na">confirm</span><span class="o">();</span>
+  <span class="n">bookings</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="n">booking</span><span class="o">.</span><span class="na">getId</span><span class="o">(),</span> <span class="n">booking</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="kt">void</span> <span class="nf">cancel</span><span class="o">(</span><span class="nc">CarBooking</span> <span class="n">booking</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Integer</span> <span class="n">id</span> <span class="o">=</span> <span class="n">booking</span><span class="o">.</span><span class="na">getId</span><span class="o">();</span>
+  <span class="k">if</span> <span class="o">(</span><span class="n">bookings</span><span class="o">.</span><span class="na">containsKey</span><span class="o">(</span><span class="n">id</span><span class="o">))</span> <span class="o">{</span>
+    <span class="n">bookings</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">id</span><span class="o">).</span><span class="na">cancel</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="tcc实现">TCC实现</h3>
+
+<p><a href="https://github.com/apache/servicecomb-pack">ServiceComb Pack</a> 还提供了一个名为TCC（Try-Cancel/Confirm实现)分布式事务协调实现。TCC借助两阶段提交协议提供了一种比较完美的恢复方式。在TCC方式下，cancel补偿显然是在第二阶段需要执行业务逻辑来取消第一阶段产生的后果。try是在第一阶段执行相关的业务操作，完成相关业务资源的占用，例如预先分配票务资源，或者检查并刷新用户账户信用额度。 在取消阶段释放相关的业务资源，例如释放预先分配的票务资源或者恢复之前占用的用户信用额度。 那我们为什么还要加入确认操作呢？这需要从业务资源的使用生命周期来入手。在try过程中，我们只是占用的业务资源，相关的执行操作只是出于待定状态，只有在确认操作执行完毕之后，业务资源才能真正被确认。</p>
+
+<p>在下图展示了正常的TCC调用流程，就是参与服务A，B分别在尝试方法中完成相关业务资源的预先分配，然后在提交阶段完成业务资源的确认操作。在实现层面和前面提到的Saga实现一样，我们需要协调器在分布式事务执行完成时向各个参与服务发送执行确认消息，由服务实例执行确认操作。</p>
+
+<p><img src="/assets/images/dts2/image-tcc-confirm.png" alt="" /></p>
+
+<p>如果参与服务在执行try方法出现错误，事务协调器Alpha会终止整个TCC分布式事务，同时事务协调器会向注册成功的参与服务发送取消消息，由服务实例执行取消操作。 假如这时还有其他的服务想参与到这个分布式事务的话， 事务协调器会以这个分布式事务已经失败为由，向参与的服务发送失败的应答消息。</p>
+
+<p><img src="/assets/images/dts2/image-tcc-cancel.png" alt="" /></p>
+
+<p>在ServiceComb Pack中，在为了实现上面描述的TCC业务述求，需要初始服务在分布式事务开始时向Alpha协调器发送<strong>TccStarted</strong>事件，Alpha协调器在接收到<strong>TccStarted</strong>事件之后，会创建相关事务追踪资源跟踪这个TCC事务整个生命周期。当在参与服务调用try方法前发送<strong>ParticipationStarted</strong>事件来声明与TCC相关本地事务。Alpha协调器会根据TCC事务当前的状态决定是否允许后续的参与服务参加到TCC事务中。 如果参与的TCC事务没有终止，Alpha协调器会回复确认消息，参与服务会继续执行相关的try方法调用；如果TCC事务已经出错终止了，Alpha协调器会回复终止消息，参与服务所在的Omega将抛出异常，直接终止try方法调用。如果参与服务调用try方法成功，则会向Alpha发送<strong>ParticipationEnded</strong>事件，因为这个事件发送之后Omega端不需要做任何操作，为了提高系统效率，Omega采用异步方式通知Alpha协调器。当初始服务执行完TCCStart所标注的方法之后， 初始服务所在的Omega会向Alpha协调器发送<strong>TccEnded</strong>事件，Alpha协调器在接收到这个事件之后会查询与本次TCC调用相关的<strong>ParticipationStarted</strong>事件识别相关的参与服务实例，然后通过向这些服务实例所对应的Omega发送<strong>Coordinated</strong>事件，由Omega调用相关的确认方法，完成本地事务提交工作。</p>
+
+<p><img src="/assets/images/dts2/image2-Tcc-confirm.png" alt="" /></p>
+
+<p>当TCC调用执行过程中出现异常，初始服务所在的Omega会向Alpha协调器发送<strong>TccEnded</strong>事件来终止当前的TCC事务。Alpha协调器则会根据其记录的TCC分布式事务的参与情况，向相关服务的Omega发送<strong>Coordinated</strong>事件，由Omega调用相关的取消方法。</p>
+
+<p><img src="/assets/images/dts2/image2-Tcc-cancel.png" alt="" /></p>
+
+<p>如果参与服务在执行try方法出错了，那Alpha协调器会收到一条标注try方法执行状态的<strong>ParticipationEnded</strong>事件，Alpha协调器会给自己发送一个包含Aborted信息的<strong>TccEnded</strong>事件来关闭正在执行的TCC事务，同时触发Omega相关恢复操作的调用。</p>
+
+<p><img src="/assets/images/dts2/image2-Tcc-exception.png" alt="" /></p>
+
+<p>下面介绍参与服务本地事务执行超时的处理的设计， 对于参与服务的try方法来说，Alpha协调器可以通过是否接收到<strong>ParticipationEnded</strong>事件判断参与服务try方法是否执行超时。 如果在超时时间内没有收到<strong>ParticipationEnded</strong>事件，Alpha事件扫描器会向数据库添加<strong>TccEnded</strong>信息，触发和之前描述一样的事务错误处理流程，关闭分布式事务以及调用Omega进行相关恢复的操作。</p>
+
+<p><img src="/assets/images/dts2/image2-Tcc-timeout.png" alt="" /></p>
+
+<p>同理当TCC分布式事务执行超时（Alpha在一定时间内没有收到TccEnded事件）， Alpha事件扫描器会发送<strong>TccEnded</strong>终止整个TCC事务，触发与上面相同的恢复操作。</p>
+
+<p><img src="/assets/images/dts2/image2-Tcc-timeout-2.png" alt="" /></p>
+
+<h3 id="编写tcc应用代码">编写TCC应用代码</h3>
+
+<p>下⾯面我们会结合ServiceComb中的<a href="https://github.com/apache/servicecomb-pack/tree/master/demo/tcc-spring-demo">TCC示例</a>，向大家介绍如何编写与TCC应用代码。这个示例以我们常见的电商场景为例，用户通过Ordering应用进行下单，Odering会调用Inventory以及Payment两个服务进行相关的业务操作。和之前Saga的示例一样，我们可以通过@EnableOmega的方式在这几个应用中注入Omega。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.spring.EnableOmega</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
+
+
+<span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableOmega</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">TccOrderingApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">TccOrderingApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>接下来我们需要在OrderingController中通过加入@TccStart来定义这个TCC分布式事务的范围，这个分布式事务的范围就是order方法，order方法会调用Inventory的order服务接口，以及Payment的pay服务接口。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.context.annotations.TccStart</span><span class="o">;</span>
+
+<span class="nd">@TccStart</span>
+<span class="nd">@PostMapping</span><span class="o">(</span><span class="s">"/order/{userName}/{productName}/{productUnit}/{unitPrice}"</span><span class="o">)</span>
+<span class="nd">@ResponseBody</span>
+<span class="kd">public</span> <span class="nc">String</span> <span class="nf">order</span><span class="o">(</span>
+    <span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">userName</span><span class="o">,</span>
+    <span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">productName</span><span class="o">,</span> <span class="nd">@PathVariable</span> <span class="nc">Integer</span> <span class="n">productUnit</span><span class="o">,</span> <span class="nd">@PathVariable</span> <span class="nc">Integer</span> <span class="n">unitPrice</span><span class="o">)</span> <span class="o">{</span>
+  <span class="c1">// Calling the inventory service</span>
+  <span class="n">restTemplate</span><span class="o">.</span><span class="na">postForEntity</span><span class="o">(</span>
+      <span class="n">inventoryServiceUrl</span> <span class="o">+</span> <span class="s">"/order/{userName}/{productName}/{productUnit}"</span><span class="o">,</span>
+      <span class="kc">null</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">userName</span><span class="o">,</span> <span class="n">productName</span><span class="o">,</span> <span class="n">productUnit</span><span class="o">);</span>
+
+  <span class="kt">int</span> <span class="n">amount</span> <span class="o">=</span> <span class="n">productUnit</span> <span class="o">*</span> <span class="n">unitPrice</span><span class="o">;</span>
+  <span class="c1">// Calling the payment service</span>
+  <span class="n">restTemplate</span><span class="o">.</span><span class="na">postForEntity</span><span class="o">(</span><span class="n">paymentServiceUrl</span> <span class="o">+</span> <span class="s">"/pay/{userName}/{amount}"</span><span class="o">,</span>
+      <span class="kc">null</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">userName</span><span class="o">,</span> <span class="n">amount</span><span class="o">);</span>
+
+  <span class="k">return</span> <span class="n">userName</span> <span class="o">+</span> <span class="s">" ordering "</span> <span class="o">+</span> <span class="n">productName</span> <span class="o">+</span> <span class="s">" with "</span> <span class="o">+</span> <span class="n">productUnit</span> <span class="o">+</span> <span class="s">" OK"</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>Inventory会在try阶段先进行库存的扣减，在分布式业务执行成功之后进行设置库存订单状态；如果业务执行失败，Inventory服务会执行恢复操作。通过定义@Participate，ServiceComb Omega可以标注相关try方法，同时通过confirmMethod 以及cancelMethod定义相关确认以及取消方法名。 这里需要注意的是这里提到的confirm，cancel方法的参数必须和try方法的相同。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.transaction.annotations.Participate</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.transaction.annotation.Transactional</span><span class="o">;</span>
+
+<span class="nd">@Participate</span><span class="o">(</span><span class="n">confirmMethod</span> <span class="o">=</span> <span class="s">"confirm"</span><span class="o">,</span> <span class="n">cancelMethod</span> <span class="o">=</span> <span class="s">"cancel"</span><span class="o">)</span>
+<span class="nd">@Transactional</span>
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">pay</span><span class="o">(</span><span class="nc">Payment</span> <span class="n">payment</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Account</span> <span class="n">account</span> <span class="o">=</span> <span class="n">getAccount</span><span class="o">(</span><span class="n">payment</span><span class="o">);</span>
+  <span class="k">if</span> <span class="o">(</span><span class="n">account</span><span class="o">.</span><span class="na">getCredit</span><span class="o">()</span> <span class="o">&gt;=</span> <span class="n">payment</span><span class="o">.</span><span class="na">getAmount</span><span class="o">())</span> <span class="o">{</span>
+    <span class="n">account</span><span class="o">.</span><span class="na">setCredit</span><span class="o">(</span><span class="n">account</span><span class="o">.</span><span class="na">getCredit</span><span class="o">()</span> <span class="o">-</span> <span class="n">payment</span><span class="o">.</span><span class="na">getAmount</span><span class="o">());</span>
+    <span class="n">accountDao</span><span class="o">.</span><span class="na">saveAndFlush</span><span class="o">(</span><span class="n">account</span><span class="o">);</span>
+    <span class="n">payments</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="n">payment</span><span class="o">.</span><span class="na">getId</span><span class="o">(),</span> <span class="n">payment</span><span class="o">);</span>
+  <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Insufficient funds!"</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+
+<span class="nd">@Transactional</span>
+<span class="nc">Account</span> <span class="nf">getAccount</span><span class="o">(</span><span class="nc">Payment</span> <span class="n">payment</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Account</span> <span class="n">account</span> <span class="o">=</span> <span class="n">accountDao</span><span class="o">.</span><span class="na">findByUserName</span><span class="o">(</span><span class="n">payment</span><span class="o">.</span><span class="na">getUserName</span><span class="o">());</span>
+  <span class="k">if</span> <span class="o">(</span><span class="nc">Objects</span><span class="o">.</span><span class="na">isNull</span><span class="o">(</span><span class="n">account</span><span class="o">))</span> <span class="o">{</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Cannot find the account!"</span><span class="o">);</span>
+  <span class="o">}</span>
+  <span class="k">return</span> <span class="n">account</span><span class="o">;</span>
+<span class="o">}</span>
+
+<span class="nd">@Transactional</span>
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">confirm</span><span class="o">(</span><span class="nc">Payment</span> <span class="n">payment</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Account</span> <span class="n">account</span> <span class="o">=</span> <span class="n">getAccount</span><span class="o">(</span><span class="n">payment</span><span class="o">);</span>
+  <span class="n">payment</span><span class="o">.</span><span class="na">setConfirmed</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+  <span class="n">payment</span><span class="o">.</span><span class="na">setCancelled</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span>
+  <span class="n">account</span><span class="o">.</span><span class="na">setBalance</span><span class="o">(</span><span class="n">account</span><span class="o">.</span><span class="na">getBalance</span><span class="o">()</span> <span class="o">-</span> <span class="n">payment</span><span class="o">.</span><span class="na">getAmount</span><span class="o">());</span>
+  <span class="n">payment</span><span class="o">.</span><span class="na">setBalance</span><span class="o">(</span><span class="n">account</span><span class="o">.</span><span class="na">getBalance</span><span class="o">());</span>
+  <span class="n">accountDao</span><span class="o">.</span><span class="na">saveAndFlush</span><span class="o">(</span><span class="n">account</span><span class="o">);</span>
+
+
+<span class="o">}</span>
+
+<span class="nd">@Transactional</span>
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">cancel</span><span class="o">(</span><span class="nc">Payment</span> <span class="n">payment</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Account</span> <span class="n">account</span> <span class="o">=</span> <span class="n">getAccount</span><span class="o">(</span><span class="n">payment</span><span class="o">);</span>
+  <span class="n">account</span><span class="o">.</span><span class="na">setCredit</span><span class="o">(</span><span class="n">account</span><span class="o">.</span><span class="na">getCredit</span><span class="o">()</span> <span class="o">+</span> <span class="n">payment</span><span class="o">.</span><span class="na">getAmount</span><span class="o">());</span>
+  <span class="n">accountDao</span><span class="o">.</span><span class="na">saveAndFlush</span><span class="o">(</span><span class="n">account</span><span class="o">);</span>
+  <span class="n">payment</span><span class="o">.</span><span class="na">setBalance</span><span class="o">(</span><span class="n">account</span><span class="o">.</span><span class="na">getBalance</span><span class="o">());</span>
+  <span class="n">payment</span><span class="o">.</span><span class="na">setConfirmed</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span>
+  <span class="n">payment</span><span class="o">.</span><span class="na">setCancelled</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>Payment会在try阶段先验证用户账户的信用值，在确认阶段执行扣减用户账户余额的操作，在恢复阶段恢复信用值。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.pack.omega.transaction.annotations.Participate</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.transaction.annotation.Transactional</span><span class="o">;</span>
+
+<span class="nd">@Participate</span><span class="o">(</span><span class="n">confirmMethod</span> <span class="o">=</span> <span class="s">"confirm"</span><span class="o">,</span> <span class="n">cancelMethod</span> <span class="o">=</span> <span class="s">"cancel"</span><span class="o">)</span>
+<span class="nd">@Transactional</span>
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">reserve</span><span class="o">(</span><span class="nc">ProductOrder</span> <span class="n">order</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Product</span> <span class="n">product</span> <span class="o">=</span> <span class="n">getProduct</span><span class="o">(</span><span class="n">order</span><span class="o">.</span><span class="na">getProductName</span><span class="o">());</span>
+  <span class="k">if</span> <span class="o">(</span><span class="n">product</span><span class="o">.</span><span class="na">getInStock</span><span class="o">()</span> <span class="o">&gt;=</span> <span class="n">order</span><span class="o">.</span><span class="na">getUnits</span><span class="o">())</span> <span class="o">{</span>
+    <span class="n">product</span><span class="o">.</span><span class="na">setInStock</span><span class="o">(</span><span class="n">product</span><span class="o">.</span><span class="na">getInStock</span><span class="o">()</span> <span class="o">-</span> <span class="n">order</span><span class="o">.</span><span class="na">getUnits</span><span class="o">());</span>
+    <span class="n">productDao</span><span class="o">.</span><span class="na">saveAndFlush</span><span class="o">(</span><span class="n">product</span><span class="o">);</span>
+    <span class="n">orders</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="n">order</span><span class="o">.</span><span class="na">getId</span><span class="o">(),</span> <span class="n">order</span><span class="o">);</span>
+  <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"The Product is out of stock!"</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">confirm</span><span class="o">(</span><span class="nc">ProductOrder</span> <span class="n">order</span><span class="o">)</span> <span class="o">{</span>
+  <span class="n">order</span><span class="o">.</span><span class="na">setConfirmed</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="nd">@Transactional</span>
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">cancel</span><span class="o">(</span><span class="nc">ProductOrder</span> <span class="n">order</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Product</span> <span class="n">product</span> <span class="o">=</span> <span class="n">productDao</span><span class="o">.</span><span class="na">findProduceByName</span><span class="o">(</span><span class="n">order</span><span class="o">.</span><span class="na">getProductName</span><span class="o">());</span>
+  <span class="n">product</span><span class="o">.</span><span class="na">setInStock</span><span class="o">(</span><span class="n">product</span><span class="o">.</span><span class="na">getInStock</span><span class="o">()</span> <span class="o">+</span> <span class="n">order</span><span class="o">.</span><span class="na">getUnits</span><span class="o">());</span>
+  <span class="n">productDao</span><span class="o">.</span><span class="na">saveAndFlush</span><span class="o">(</span><span class="n">product</span><span class="o">);</span>
+  <span class="n">order</span><span class="o">.</span><span class="na">setCancelled</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="nd">@Transactional</span>
+<span class="kd">private</span> <span class="nc">Product</span> <span class="nf">getProduct</span><span class="o">(</span><span class="nc">String</span> <span class="n">productName</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">Product</span> <span class="n">product</span> <span class="o">=</span> <span class="n">productDao</span><span class="o">.</span><span class="na">findProduceByName</span><span class="o">(</span><span class="n">productName</span><span class="o">);</span>
+  <span class="k">if</span> <span class="o">(</span><span class="nc">Objects</span><span class="o">.</span><span class="na">isNull</span><span class="o">(</span><span class="n">product</span><span class="o">))</span> <span class="o">{</span>
+    <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Product not exists at all!"</span><span class="o">);</span>
+  <span class="o">}</span>
+  <span class="k">return</span> <span class="n">product</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="小结">小结</h3>
+
+<p>在本文中我们先从分布式事务场景入手，采用交互图的方式，向大家介绍分布式Saga以及TCC分布式事务协调协议交互，最后结合ServiceComb Pack所提供的示例向大家介绍如何编写Saga以及TCC的应用代码。</p>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
+  
+
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+            <h1 class="page__title" itemprop="headline">Saga分布式事务解决方案与实践
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+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
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+      <section class="page__content" itemprop="text">
+        <h2 id="saga分布式事务解决方案与实践">Saga分布式事务解决方案与实践</h2>
+
+<p>本文为2018年QConBeijing Saga分布式事务解决方案与实践演讲实录。 <br />
+【2019年8月更新】目前我们的集中式的Saga解决方案ServiceComb已经发布了7版，去年底项目更名为 ServiceComb Pack，提供TCC的支持。大家可以访问我们项目的<a href="https://github.com/apache/servicecomb-pack">github地址</a>，获取到更多与项目相关的详细信息，欢迎大家为项目加星哦。</p>
+
+<p><img src="/assets/images/saga/Saga.001.jpeg" alt="" /></p>
+
+<p><img src="/assets/images/saga/Saga.002.jpeg" alt="" />
+我先介绍一下我自己，我叫姜宁，来自于华为开源能力中心，现在负责的是ServiceComb这个开源项目。ServiceComb这个项目已经进到Apache孵化，应该是去年11月份时进到Apache孵化的，这个月我们帮刚发了1.0M1版，但对于SAGA来说我们属于探索的阶段，发布了0.1.0。</p>
+
+<p>我参与过Apache一些项目，我也是Apache的 Member，是Apache CXF, Apache Camel 还有的PMC。还有一件事情，前一段时间帮阿里同学孵化 RocketMQ，我是以导师的身份参与的，属于见习的Mentor.这回带着ServiceComb这个项目，我感觉我把很多角色都玩了一遍。后面如果大家对开源项目进入Apache孵化感兴趣的话也可以来找到。</p>
+
+<p>【2019年8月更新】最近发现Apache Camel的国内小伙伴越来越多， 有兴趣想加入的朋友可以给我发邮件 willem.jiang AT gmail.</p>
+
+<p><img src="/assets/images/saga/Saga.003.jpeg" alt="" /></p>
+
+<p>今天的议题围绕几个方面来展开，一个是微服务事务一致性的问题，然后讲一讲业界的SAGA解决方案，我们在ServiceComb里也提供了SAGA的实现。另外一件事情，我项目这边也在招新，欢迎广大感兴趣的同学一会儿加我微信。我们现在项目其实架子也都搭得不错了，基本功能都实现了，就是等着大家跳到碗里面，一起来解决微服务事务一致性问题。</p>
+
+<p><img src="/assets/images/saga/Saga.004.jpeg" alt="" /></p>
+
+<p>微服务架构强调的服务能够独立开发，独立演进，独立部署， 独立团队。</p>
+
+<p>那微服务相关的数据是采用什么方式进行存储的呢？</p>
+
+<p><img src="/assets/images/saga/Saga.005.jpeg" alt="" /></p>
+
+<p>传统的单体应用一般采用的是数据库提供的事务一致性，通过数据库提供的提交以及回滚机制来保证相关操作的ACID，这些操作要么同时成功，要么同时失败。各个服务看到数据库中的数据是一致的，同时数据库的操作也是相互隔离的，最后数据也是在数据库中持久存储的。这样的架构不具备横向扩展能力，服务之间的耦合程度也比较高，会存在单点故障。</p>
+
+<p><img src="/assets/images/saga/Saga.006.jpeg" alt="" /></p>
+
+<p>在微服务架构中， 有一个database per service的模式， 这个模式就是每一个服务一个数据库。 这样可以保证微服务独立开发，独立演进，独立部署， 独立团队。</p>
+
+<p>由于一个应用是由一组相互协作的微服务所组成，在分布式环境下由于各个服务访问的数据是相互分离的， 服务之间不能靠数据库来保证事务一致性。   这就需要在应用层面提供一个协调机制，来保证一组事务执行要么成功，要么失败。</p>
+
+<p><img src="/assets/images/saga/Saga.007.jpeg" alt="" /></p>
+
+<p>两阶段提交其实比较简单，这边有两个资源提供准备和提交两个接口。</p>
+
+<p>由于隔离性互斥的要求，在事务执行过程中，所有的资源都是被锁定的，这种情况只适合执行时间确定的短事务。  但是为了保证分布式事务的一致性，大都是采用串行化的隔离级别来保证事务一致性，这样会降低系统的吞吐。</p>
+
+<p>但因为2PC的协议成本比较高，又有全局锁的问题，性能会比较差。 现在大家基本上不会采用这种强一致解决方案。</p>
+
+<p><img src="/assets/images/saga/Saga.008.jpeg" alt="" /></p>
+
+<p>这里先简单介绍一下酸碱平衡中的酸 ACID。 原子性 事务作为整体来执行，要么全部执行，要么都不执行。一致性 事务应确保数据从一个一致的状态转变为另一个一致的状态。隔离性 多个事务并发执行时，一个事务的执行不应影响其他事务的执行。持久性 已提交的事务修改数据会被持久保持</p>
+
+<p>酸碱平衡中的碱 BASE。 基本可用 可以保证分布式事务参与方不一定同时在线。柔性状态 允许系统状态更新有一定的延时，这个延时对客户来说不一定能察觉。最终一致性 通常是通过消息可达的方式保证系统的最终一致性。</p>
+
+<p>这是分布式事务的一些基础理论数据库以及分布式的两阶段提交都提供了ACID的保证。 由于隔离性互斥的要求，在事务执行过程中，所有的资源都是被锁定的，这种情况只适合执行时间确定的短事务。后续大家开始通过业务逻辑将互斥锁操作从资源层面上移到业务层面，这并不是完全放弃了ACID，而是通过放宽一致性要求，借助本地事务来实现最终分布式事务一致性的同时也保证系统的吞吐。</p>
+
+<p><img src="/assets/images/saga/Saga.009.jpeg" alt="" /></p>
+
+<p>TCC名字的由来是其中包含了 try, confirm, cancel三个操作。</p>
+
+<p>与两阶段提交相比，TCC位于业务服务层， 没有单独的准备阶段，Try操作可以灵活选择业务资源锁的粒度。TCC是通过最终一致性来解决系统性能问题的这个设计，对我们设计抉择有很大的启发。 有些时候<strong>系统的技术问题是可以通过业务建模的方式来解决的</strong>。</p>
+
+<p><img src="/assets/images/saga/Saga.010.jpeg" alt="" /></p>
+
+<p>​回顾之前的酸碱平衡的示例，我们得到的启发我们可以通过业务模型的改进提升系统性能。有关领域建模，这里给大家推荐两本书，一个是《领域驱动设计》，还有一个是《实现领域驱动设计》。</p>
+
+<p>微服务设计目标高内聚低耦合，领域驱动设计能帮助构建一致的业务模型和系统实现模型，通过领域驱动设计可以明确微服务的界限上下文。通过在业务层面上把它们之间的强耦合关系拆开之后，带来最大的好处是，它们自身可以借助传统的数据库所提供的功能来实现一致性。只不过是在微服务与微服务之间，它们需要通过前面提到的这种柔性事务方式来做这件事情。</p>
+
+<p><img src="/assets/images/saga/Saga.011.jpeg" alt="" /></p>
+
+<p>微服务架构是一个在限定界限上下文内的松耦合的服务架构。微服务事务一致性的建议是什么呢？就是内刚外柔。在限定上下文内容借助数据库提供事务一致性来做强一致。在限定上下文之间依靠最终一致性方案来解决服务间协同问题。</p>
+
+<p>对于柔性事务来常见的实现方式有TCC，和Saga，今天我们主要向大家介绍Saga的实现。</p>
+
+<p><img src="/assets/images/saga/Saga.012.jpeg" alt="" /></p>
+
+<p>Saga其实是30年前的一篇数据库论文里提到的一个概念。在论文中一个Saga事务就是一个长期运行的事务，这个事务是由多个本地事务所组成， 每个本地事务有相应的执行模块和补偿模块，当saga事务中的任意一个本地事务出错了， 可以通过调用相关事务对应的补偿方法恢复，达到事务的最终一致性。</p>
+
+<p><img src="/assets/images/saga/Saga.013.jpeg" alt="" /></p>
+
+<p>Saga概念虽然提出来快30年了， 随着微服务的出现，越来越多的人想解决分布式事务问题，Saga也逐步受到大家的关注。</p>
+
+<p>我们在实现Saga过程中，主要是参考了Caitie McCaffrey 在分布式Saga论文，以及Chris Richardson的研究。 大家可以通过下面的链接获取相关的信息。</p>
+
+<p><img src="/assets/images/saga/Saga.016.jpeg" alt="" /></p>
+
+<p>在分布式系统中由于网络请求可能的延时，在Caitie的论文中对被Saga调用的服务提出两点要求，我们需要Saga调用的服务支持幂等。 在服务请求的过程中，可能会出现超时重试的情况，我们需要通过幂等来避免多次请求所带来的问题。</p>
+
+<p><img src="/assets/images/saga/Saga.017.jpeg" alt="" /></p>
+
+<p>前面提到了超时重试的机制，现在我们再来看看重试取消的情况。补偿可交换原则是指Saga并行处理的过程中，如果发生了超时重试事件之后，并进行了补偿的操作，那么补偿操作是直接生效的。</p>
+
+<p>为了满足这个要求，需要我们在设计系统的过程中保留所有的事务数据。</p>
+
+<p><img src="/assets/images/saga/Saga.018.jpeg" alt="" /></p>
+
+<p>由此我们可以知道Saga模型只支持ACD，不提供隔离性的保证。</p>
+
+<p><img src="/assets/images/saga/Saga.019.jpeg" alt="" /></p>
+
+<p>因为saga事务没有准备阶段，事务没有隔离，如果两个saga事务同时操作同一资源就会遇到我们操作多线程临界资源的的情况。因此会产生更新丢失，脏数据读取等问题。</p>
+
+<p><img src="/assets/images/saga/Saga.020.jpeg" alt="" /></p>
+
+<p>为了解决隔离性带来的问题，我们可以参考一下TCC的解决方案，从业务层面入手加入一Session以及锁的机制来保证能够串行化操作资源。也可以在业务层面通过预先冻结资金的方式隔离这部分资源， 最后在业务操作的过程中可以通过及时读取当前状态的方式获取到最新的更新。</p>
+
+<p><img src="/assets/images/saga/Saga.021.jpeg" alt="" /></p>
+
+<p>目前业界提供了两类Saga的实现方式。 一个是集中式协调器的实现方式，一个分布式的实现方式。</p>
+
+<p><img src="/assets/images/saga/Saga.022.1.jpeg" alt="" /></p>
+
+<p>集中式的Saga实现一般是通过一个Saga对象来追踪所有的Saga子任务的调用情况， 根据调用情况来决定是否需要调用对应的补偿方面，协调器和调用方是在一个进程中的。</p>
+
+<p><img src="/assets/images/saga/Saga.022.2.jpeg" alt="" /></p>
+
+<p>这里附上的是Camel最近实现的Saga EIP， 通过这个DSL可以很方便地实现执行操作和取消操作。
+集中式的Saga实现方式比较直观并且容易控制，问题是业务耦合程度会比较高。</p>
+
+<p><img src="/assets/images/saga/Saga.023.jpeg" alt="" /></p>
+
+<p>布式的Saga 一般是采用事件驱动方式让参与的服务方进行相关的交互。相关的业务方只需要订阅相关的领域事件即可。 Chirs提供了基于事件溯源的实现，同时axonframework也提供了相关的实现，详细的内容大家可以参考上面的链接。</p>
+
+<p>分布式saga实现的好处： 采用事件源的方式降低系统复杂程度，提升系统扩展性， 处理模块通过订阅事件的方式降低系统的耦合程度。当然这也的实现也有一些问题： saga系统会涉及大量的业务事件，这样会对编码和调试会带来一些问题；还有就是相关的业务逻辑处理是基于事件，相关事件处理模块可能会有循环依赖的问题。</p>
+
+<p><img src="/assets/images/saga/Saga.024.jpeg" alt="" /></p>
+
+<p>前面理论铺垫已经做完了，现在讲一讲我们的实现。 ServiceComb是去年5月份华为开源的微服务框架，它是华为云微服务框架引擎很重要的一个组成部分。大家可以通过下面链接来访问ServiceComb官网以及相关的代码库。</p>
+
+<p>目前ServiceComb主要有三个项目组成：第一个是ServiceCenter做服务发现的，这是go语言在etcd
+基础实现的服务注册中心，另外是java的一个微服务框架，这块是基于vertx的基础上实现了全异步操作接口，框架有比较好的性能。 Saga项目其实就是我们针对前面刚刚提到Saga模式的提供的一个实现。</p>
+
+<p><img src="/assets/images/saga/Saga.025.jpeg" alt="" /></p>
+
+<p>集中式的Saga协调器构建过程参考了Caitie的论文，实现了一个集中式Saga调用协调器。 后续我们在开发的过程中，发现如果不提供DSL的话，让用户定义Saga事件很困难。后来我们受到Zipkin的启发，我们实现了一个分布式的Saga协调器。</p>
+
+<p><img src="/assets/images/saga/Saga.026.jpeg" alt="" /></p>
+
+<p>集中式的协调器，包含了Saga调用请求接收，分析，以及执行和结果查询这部分的内容。任务代理模块需要预先知道Saga事务调用关系图。执行模块根据生成的调用图产生调用任务，调用相关微服务服务接口。如果服务调用执行出错，会调用服务的相关的补偿方法回滚。</p>
+
+<p>下面是我们实现的两个不同的调度模型。</p>
+
+<p><img src="/assets/images/saga/Saga.027.jpeg" alt="" /></p>
+
+<p>这里Saga执行模块通过分析请求的Json数据，构建一个调用关系图，这里我们是通过JSon来描述Saga事务串行调用子事务或者并行调用子事务。关系调用图被Saga实现中的任务运行模块分解成为一个一个执行任务，执行任务由任务消费者获取并生成相关的调用 （这里同时支持串行和并行调用）。</p>
+
+<p>Saga任务会根据执行的情况向Saga log中记录对应的Saga事务的关键事件，同时我们的事件查看器查看到Saga事务相关的执行情况。</p>
+
+<p><img src="/assets/images/saga/Saga.028.jpeg" alt="" /></p>
+
+<p>后续我们采用了Actor模型对任务的调度模块进行了重构，在不进行调优的情况下，系统性能提升一倍。</p>
+
+<p><img src="/assets/images/saga/Saga.029.jpeg" alt="" /></p>
+
+<p>集中式Saga的实现的好处是易于监控和协调， 但是坏处就是需要依赖工具对Saga调用进行相关的描述。那我们有没有一个好的方式自动获取Saga事务的定义呢？ 为了解决这一问题，我们对内部的Saga实现进行新的改进。</p>
+
+<p><img src="/assets/images/saga/Saga.030.jpeg" alt="" /></p>
+
+<p>正如前面提到的，Zipkin通过在服务调用双方传递上下文的方式可以构建出完整的调用链， 这个调用链和我们需要的Saga子事务调用信息很类似。 因此我们借助Zipkin实现了一套Saga调用关系追踪的模块。</p>
+
+<p>为了实现这个事务追踪模型，就需要我们在应用端部署相关的监控模块，同时监控模块需要和后台进行协同交互，于是我们设计了Pack狼群架构。</p>
+
+<p><img src="/assets/images/saga/Saga.031.jpeg" alt="" /></p>
+
+<p>狼群架构有两个参与者， 一个是Alpha， 一个是Omega。Alpha是狼群首领，负责协调事务执行情况，Omega是狼群成员，负责收集事务，向狼群首领上报情况，并执行相关指令。</p>
+
+<p><img src="/assets/images/saga/Saga.032.jpeg" alt="" /></p>
+
+<p>Omega会以切面编程的方式向应用程序注入相关的处理模块。这里有拦截请求的模块， 用来帮助我们构建分布式事务调用的上下文。 同时在事务处理初始阶段处理事务的相关准备的操作，例如创建Saga 起始事件，以及相关的子起始事件， 根据事务的执行的成功或者失败生产相关的事务终止或者失败事件。</p>
+
+<p><img src="/assets/images/saga/Saga.033.jpeg" alt="" /></p>
+
+<p>Omega会与Alpha进行链接会把这些事件通知给Alpha。 Alpha可以在后台进行分析，根据Saga事务执行的情况给Omega下达相关的指令进行相关的回滚恢复。</p>
+
+<p>这样设计的好处是Saga实现代码与用户的代码分离， 用户只需要添加几个annotation，Saga实现就能Saga事件的执行情况并进行相关的处理。</p>
+
+<p><img src="/assets/images/saga/Saga.034.jpeg" alt="" /></p>
+
+<p>这是Omega和Alpha之间的正常业务逻辑的交互图，这里Omega通过分析调用上下文决定是否发生Saga事务的起始事件到Alpha，后续ServiceA在调用ServiceB，会将相关的调用上下文传递给ServiceB。ServiceB的Omega模块会截取这个调用上下文生成相关子事务事件信息。</p>
+
+<p><img src="/assets/images/saga/Saga.035.jpeg" alt="" /></p>
+
+<p>如果服务调用的过程中抛出异常，Omega会将终止事件发送到Alpha端， Alpha的后台进程会定时做扫描，扫描过程中会发现有需要恢复的事件。Alpha会向Omega发消息调用相关的恢复操作，来保证整个Saga事务的原子性。目前Omega也开始提供重试功能，也就是事务调用如果失败了， Omega会根据设置进行重试尝试。
+<img src="/assets/images/saga/Saga.036.jpeg" alt="" /></p>
+
+<p>未来的开发计划，第一个就是Alpha这边会提供多租服务架构，这样可以在云上提供Saga协调服务；为了保证系统的可达性，我们可能会用消息队列的方式来做传递事件信息。还有就是刚刚给大家提到的TCC协调器也是我们下一步的工作重点。如果能在Omega端来保证幂等操作的话，可以极大减轻大家的业务编程负担。另外根据Saga的执行这个情况，也要做一些可视化的事情，这块其实也是前端，大家如果有做前端技能的话，可以跟我联系一下。</p>
+
+<p>还有Omega需要解决多线程共享调用的问题。</p>
+
+<p>【2019年8月更新】TCC的功能我们已经在<a href="https://github.com/apache/servicecomb-pack/releases/tag/0.3.0">Pack 0.3.0</a>中提供, 并且在 <a href="https://github.com/apache/servicecomb-pack/releases/tag/0.4.0">Pack 0.4.0</a>中提供了Alpha多活支持。现在开发的ServiceComb Pack 0.5.0 做了两个比较大的改进， 一个是在客户端（Omega）提供异步调用的支持， 一个是服务端（Alpha）采用状态机追踪服务的调用情况。</p>
+
+<p>大家可以通过查看我们的<a href="https://github.com/apache/servicecomb-pack/blob/master/ROADMAP.md">线路图</a>, 或者通过<a href="https://gitter.im/ServiceCombUsers/Saga">gitter</a>与社区开发人员互动。</p>
+
+<p>有关ServiceComb Pack交互的细节以及相关的架构设计，大家可以参考下面两篇文章:</p>
+<ul>
+  <li><a href="http://servicecomb.apache.org/cn/docs/distributed-transaction-of-services-1/">基于服务的分布式事务(上篇)</a></li>
+  <li><a href="http://servicecomb.apache.org/cn/docs/distributed-transaction-of-services-2/">基于服务的分布式事务(下篇)</a>
+<img src="/assets/images/saga/Saga.037.jpeg" alt="" /></li>
+</ul>
+
+<p>简单小节一下，我们对事务一致性做了简单的回顾，业界的SAGA解决方案也提了一下，简单介绍一下ServiceComb的Saga实现，以及我们后续的开发计划。</p>
+
+<p><img src="/assets/images/saga/Saga.038.jpeg" alt="" /></p>
+
+<p>这个最关键了，大家扫码，上面是ServiceComb小助手，可以帮你拉到微信群里，如果大家有兴趣想加入到我们SAGA项目开发可以与ServiceComb小助手联系。</p>
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+    <meta itemprop="headline" content="ServiceComb中的数据最终一致性方案 - part 1">
+    <meta itemprop="description" content="在微服务场景下的数据一致性问题背景">
+    <meta itemprop="datePublished" content="September 13, 2017">
+    <meta itemprop="dateModified" content="September 13, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb中的数据最终一致性方案 - part 1
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>数据一致性是许多系统的关键部分，特别是在微服务和云的环境下。我们最近在ServiceComb下发布了<a href="https://github.com/apache/incubator-servicecomb-saga">Saga</a>项目，
+以解决数据一致性问题。但为什么数据一致性如此重要？Saga又是什么？</p>
+
+<h2 id="单体应用的数据一致性">单体应用的数据一致性</h2>
+<p>想象一下如果我们经营着一家大型企业，下属有航空公司、租车公司、和连锁酒店。我们为客户提供一站式的旅游行程规划服务，这样客户只需要提供出行目的地，
+我们帮助客户预订机票、租车、以及预订酒店。从业务的角度，我们必须保证<strong>上述三个服务的预订都完成才能满足一个成功的旅游行程，否则不能成行</strong>。</p>
+
+<p>我们的单体应用要满足这个需求非常简单，只需将这个三个服务请求放到同一个数据库事务中，数据库会帮我们保证全部成功或者全部回滚。</p>
+
+<p><img src="/assets/images/saga.monolithic.png" alt="单体应用" class="align-center" /></p>
+
+<p>当这个功能上线以后，公司非常满意，客户也非常高兴。</p>
+
+<h2 id="微服务场景下的数据一致性">微服务场景下的数据一致性</h2>
+<p>这几年中，我们的行程规划服务非常成功，企业蒸蒸日上，用户量也翻了数十倍。企业的下属航空公司、租车公司、和连锁酒店也相继推出了更多服务以满足客户需求，
+我们的应用和开发团队也因此日渐庞大。如今我们的单体应用已变得如此复杂，以至于没人了解整个应用是怎么运作的。更糟的是新功能的上线现在需要所有研发团队合作，
+日夜奋战数周才能完成。看着市场占有率每况愈下，公司高层对研发部门越来越不满意。</p>
+
+<p>经过数轮讨论，我们最终决定将庞大的单体应用一分为四：机票预订服务、租车服务、酒店预订服务、和支付服务。服务各自使用自己的数据库，并通过HTTP协议通信。
+负责各服务的团队根据市场需求按照自己的开发节奏发版上线。如今我们面临新的挑战：如何保证最初<strong>三个服务的预订都完成才能满足一个成功的旅游行程，
+否则不能成行</strong>的业务规则？现在服务有各自的边界，而且数据库选型也不尽相同，通过数据库保证数据一致性的方案已不可行。</p>
+
+<p><img src="/assets/images/saga.service.boundary.png" alt="服务边界" class="align-center" /></p>
+
+<h2 id="sagas">Sagas</h2>
+<p>幸运的是我们在互联网找到一篇精彩的<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">论文</a>，文中提出的数据一致性解决方案<em>Saga</em>恰好满足我们的业务要求。</p>
+
+<blockquote>
+  <p>Saga是一个长活事务，可被分解成可以交错运行的子事务集合。其中每个子事务都是一个保持数据库一致性的真实事务。[<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>在我们的业务场景下，一个行程规划的事务就是一个Saga，其中包含四个子事务：机票预订、租车、酒店预订、和支付。</p>
+
+<p><img src="/assets/images/saga.transactions.png" alt="事务" class="align-center" /></p>
+
+<p><a href="http://www.chrisrichardson.net/">Chris Richardson</a>在他的文章<a href="http://microservices.io/patterns/data/saga.html">Pattern: Saga</a>中对Saga有所描述。
+Caitie McCaffrey也在她的<a href="https://www.youtube.com/watch?v=xDuwrtwYHu8">演讲</a>中提到如何在微软的<a href="https://en.wikipedia.org/wiki/Halo_4">光晕 4</a>游戏中如何应用saga解决数据一致性问题。</p>
+
+<h3 id="saga的运行原理">Saga的运行原理</h3>
+<blockquote>
+  <p>Saga中的事务相互关联，应作为（非原子）单位执行。任何未完全执行的Saga是不满足要求的，如果发生，必须得到补偿。要修正未完全执行的部分，
+每个saga子交易T<sub>1</sub>应提供对应补偿事务C<sub>1</sub>[<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>我们根据上述规则定义以下事务及其相应的事务补偿：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: center">服务</th>
+      <th style="text-align: center">事务</th>
+      <th style="text-align: center">补偿</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: center">机票预订</td>
+      <td style="text-align: center">预订机票</td>
+      <td style="text-align: center">取消预订</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">租车</td>
+      <td style="text-align: center">租车</td>
+      <td style="text-align: center">取消预订</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">酒店预订</td>
+      <td style="text-align: center">预订房间</td>
+      <td style="text-align: center">取消预订</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">支付</td>
+      <td style="text-align: center">支付</td>
+      <td style="text-align: center">退款</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p>当每个saga子事务 T<sub>1</sub>, T<sub>2</sub>, …, T<sub>n</sub> 都有对应的补偿定义 C<sub>1</sub>, C<sub>2</sub>, …, C<sub>n-1</sub>, 
+那么saga系统可以保证 [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+  <ul>
+    <li>子事务序列 T<sub>1</sub>, T<sub>2</sub>, …, T<sub>n</sub>得以完成 (最佳情况)</li>
+    <li>或者序列 T<sub>1</sub>, T<sub>2</sub>, …, T<sub>j</sub>, C<sub>j</sub>, …, C<sub>2</sub>, C<sub>1</sub>, 0 &lt; j &lt; n, 得以完成</li>
+  </ul>
+</blockquote>
+
+<p>换句话说，通过上述定义的事务/补偿，saga保证满足以下业务规则：</p>
+<ul>
+  <li>所有的预订都被执行成功，如果任何一个失败，都会被取消</li>
+  <li>如果最后一步付款失败，所有预订也将被取消</li>
+</ul>
+
+<h3 id="saga的恢复方式">Saga的恢复方式</h3>
+<p><a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">原论文</a>中描述了两种类型的Saga恢复方式：</p>
+<ul>
+  <li><strong>向后恢复</strong> <em>补偿</em>所有已完成的事务，如果任一子事务失败</li>
+  <li><strong>向前恢复</strong> <em>重试</em>失败的事务，假设每个子事务最终都会成功</li>
+</ul>
+
+<p>显然，向前恢复没有必要提供补偿事务，如果你的业务中，子事务（最终）总会成功，或补偿事务难以定义或不可能，向前恢复更符合你的需求。</p>
+
+<p>理论上补偿事务永不失败，然而，在分布式世界中，服务器可能会宕机，网络可能会失败，甚至数据中心也可能会停电。在这种情况下我们能做些什么？
+最后的手段是提供回退措施，比如人工干预。</p>
+
+<h3 id="使用saga的条件">使用Saga的条件</h3>
+<p>Saga看起来很有希望满足我们的需求。所有长活事务都可以这样做吗？这里有一些限制：</p>
+<ul>
+  <li>Saga只允许两个层次的嵌套，顶级的Saga和简单子事务 [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</li>
+  <li>在外层，全原子性不能得到满足。也就是说，sagas可能会看到其他sagas的部分结果 [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</li>
+  <li>每个子事务应该是独立的原子行为 [2]</li>
+</ul>
+
+<p>在我们的业务场景下，航班预订、租车、酒店预订和付款是自然独立的行为，而且每个事务都可以用对应服务的数据库保证原子操作。</p>
+
+<p>我们在行程规划事务层面也不需要原子性。一个用户可以预订最后一张机票，而后由于信用卡余额不足而被取消。同时另一个用户可能开始会看到已无余票，
+接着由于前者预订被取消，最后一张机票被释放，而抢到最后一个座位并完成行程规划。</p>
+
+<p>补偿也有需考虑的事项：</p>
+<blockquote>
+  <p>补偿事务从语义角度撤消了事务T<sub>i</sub>的行为，但未必能将数据库返回到执行T<sub>i</sub>时的状态。（例如，如果事务触发导弹发射，
+则可能无法撤消此操作）[<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>但这对我们的业务来说不是问题。其实难以撤消的行为也有可能被补偿。例如，发送电邮的事务可以通过发送解释问题的另一封电邮来补偿。</p>
+
+<h2 id="总结">总结</h2>
+<p>现在我们有了通过Saga来解决数据一致性问题的方案。它允许我们成功地执行所有事务，或在任何事务失败的情况下，补偿已成功的事务。
+虽然Saga不提供<a href="https://en.wikipedia.org/wiki/ACID">ACID</a>保证，但仍适用于许多数据最终一致性的场景。那我们如何设计一个Saga系统？
+让我们在下一篇博文来回答这个问题。</p>
+
+<h2 id="参考">参考</h2>
+<ol>
+  <li><a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Original Paper on Sagas</a> by By Hector Garcia-Molina &amp; Kenneth Salem</li>
+  <li>Gifford, David K and James E Donahue, “Coordinating Independent Atomic Actions”, Proceedings of IEEE COMPCON, San Francisco, CA, February, 1985</li>
+  <li>Chris Richardson: http://www.chrisrichardson.net/</li>
+  <li>ServiceComb Saga Project: https://github.com/apache/incubator-servicecomb-saga</li>
+</ol>
+
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+    <meta itemprop="description" content="ServiceComb中的分布式Saga设计">
+    <meta itemprop="datePublished" content="September 16, 2017">
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+            <h1 class="page__title" itemprop="headline">ServiceComb中的数据最终一致性方案 - part 2
+</h1>
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+      <section class="page__content" itemprop="text">
+        <p>在我的前一篇<a href="/cn/docs/distributed_saga_1/">文章</a>，我谈到怎么用<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Saga</a>解决行程规划应用的数据一致性问题。
+现在让我们尝试设计实现Saga。</p>
+
+<h2 id="saga-log">Saga Log</h2>
+<p>Saga保证所有的子事务都得以完成或补偿，但Saga系统本身也可能会崩溃。Saga崩溃时可能处于以下几个状态：</p>
+<ul>
+  <li>Saga收到事务请求，但尚未开始。因子事务对应的微服务状态未被Saga修改，我们什么也不需要做。</li>
+  <li>一些子事务已经完成。重启后，Saga必须接着上次完成的事务恢复。</li>
+  <li>子事务已开始，但尚未完成。由于远程服务可能已完成事务，也可能事务失败，甚至服务请求超时，saga只能重新发起之前未确认完成的子事务。这意味着子事务必须幂等。</li>
+  <li>子事务失败，其补偿事务尚未开始。Saga必须在重启后执行对应补偿事务。</li>
+  <li>补偿事务已开始但尚未完成。解决方案与上一个相同。这意味着补偿事务也必须是幂等的。</li>
+  <li>所有子事务或补偿事务均已完成，与第一种情况相同。</li>
+</ul>
+
+<p>为了恢复到上述状态，我们必须追踪子事务及补偿事务的每一步。我们决定通过事件的方式达到以上要求，并将以下事件保存在名为saga log的持久存储中：</p>
+<ul>
+  <li><strong>Saga started event</strong> 保存整个saga请求，其中包括多个事务/补偿请求</li>
+  <li><strong>Transaction started event</strong> 保存对应事务请求</li>
+  <li><strong>Transaction ended event</strong> 保存对应事务请求及其回复</li>
+  <li><strong>Transaction aborted event</strong> 保存对应事务请求和失败的原因</li>
+  <li><strong>Transaction compensated event</strong> 保存对应补偿请求及其回复</li>
+  <li><strong>Saga ended event</strong> 标志着saga事务请求的结束，不需要保存任何内容</li>
+</ul>
+
+<p><img src="/assets/images/saga.events.png" alt="Events" class="align-center" /></p>
+
+<p>通过将这些事件持久化在saga log中，我们可以将saga恢复到上述任何状态。</p>
+
+<p>由于Saga只需要做事件的持久化，而事件内容以JSON的形式存储，Saga log的实现非常灵活，数据库（SQL或NoSQL），持久消息队列，甚至普通文件可以用作事件存储，
+当然有些能更快得帮saga恢复状态。</p>
+
+<h2 id="saga请求的数据结构">Saga请求的数据结构</h2>
+<p>在我们的业务场景下，航班预订、租车、和酒店预订没有依赖关系，可以并行处理，但对于我们的客户来说，只在所有预订成功后一次付费更加友好。
+那么这四个服务的事务关系可以用下图表示：</p>
+
+<p><img src="/assets/images/saga.transactions.png" alt="Transactions" class="align-center" /></p>
+
+<p>将行程规划请求的数据结构实现为<a href="https://en.wikipedia.org/wiki/Directed_acyclic_graph">有向非循环图</a>恰好合适。
+图的根是saga启动任务，叶是saga结束任务。</p>
+
+<p><img src="/assets/images/saga.graph.png" alt="Request Graph" class="align-center" /></p>
+
+<h2 id="parallel-saga">Parallel Saga</h2>
+<p>如上所述，航班预订，租车和酒店预订可以并行处理。但是这样做会造成另一个问题：如果航班预订失败，而租车正在处理怎么办？我们不能一直等待租车服务回应，
+因为不知道需要等多久。</p>
+
+<p>最好的办法是再次发送租车请求，获得回应，以便我们能够继续补偿操作。但如果租车服务永不回应，我们可能需要采取回退措施，比如手动干预。</p>
+
+<p>超时的预订请求可能最后仍被租车服务收到，这时服务已经处理了相同的预订和取消请求。</p>
+
+<p><img src="/assets/images/saga.commutative.png" alt="Network Latency" class="align-center" /></p>
+
+<p>因此，服务的实现必须保证补偿请求执行以后，再次收到的对应事务请求无效。
+Caitie McCaffrey在她的演讲<a href="https://www.youtube.com/watch?v=1H6tounpnG8">Distributed Sagas: A Protocol for Coordinating Microservices</a>中把这个称为<strong>可交换的补偿请求 (commutative compensating request)</strong> 。</p>
+
+<h2 id="acid-and-saga">ACID and Saga</h2>
+<p><a href="https://en.wikipedia.org/wiki/ACID">ACID</a>是具有以下属性的一致性模型:</p>
+<ul>
+  <li>原子性（Atomicity）</li>
+  <li>一致性（Consistency）</li>
+  <li>隔离性（Isolation）</li>
+  <li>持久性（Durability）</li>
+</ul>
+
+<p>Saga不提供ACID保证，因为原子性和隔离性不能得到满足。原<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">论文</a>描述如下：</p>
+<blockquote>
+  <p>full atomicity is not provided. That is, sagas may view the partial results of other sagas [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>通过saga log，saga可以保证一致性和持久性。</p>
+
+<h2 id="saga-架构">Saga 架构</h2>
+<p>最后，我们的Saga架构如下</p>
+
+<p><img src="/assets/images/saga.design.png" alt="Saga Architecture" class="align-center" /></p>
+
+<ul>
+  <li>Saga Execution Component解析请求JSON并构建请求图</li>
+  <li>TaskRunner 用任务队列确保请求的执行顺序</li>
+  <li>TaskConsumer 处理Saga任务，将事件写入saga log，并将请求发送到远程服务</li>
+</ul>
+
+<h2 id="总结">总结</h2>
+<p>本文讨论了如何实现saga，通过saga log来保存事务和补偿事件。也提到如何从saga log中持久化的事件恢复崩溃的saga系统。
+为了满足saga的一致性保证，微服务的设计有以下几个要求：</p>
+<ul>
+  <li>事务和赔偿请求必须幂等</li>
+  <li>补偿请求必须可交换（commutative）</li>
+</ul>
+
+<h2 id="references">References</h2>
+<ol>
+  <li><a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Original Paper on Sagas</a> by By Hector Garcia-Molina &amp; Kenneth Salem</li>
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+            <h1 class="page__title" itemprop="headline">ServiceComb中的数据最终一致性方案 - part 3
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+      <section class="page__content" itemprop="text">
+        <p>在我的前一篇<a href="/cn/docs/distributed_saga_2/">文章</a>，我谈到了ServiceComb下的<a href="https://en.wikipedia.org/wiki/Two-phase_commit_protocol">Saga</a>是怎么设计的。
+然而，业界还有其他数据一致性解决方案，如两阶段提交（2PC）和Try-Confirm / Cancel（TCC）。那saga相比之下有什么特别？</p>
+
+<h2 id="两阶段提交-two-phase-commit-2pc">两阶段提交 Two-Phase Commit (2PC)</h2>
+<blockquote>
+  <p>两阶段提交协议是一种分布式算法，用于协调参与分布式原子事务的所有进程，以保证他们均完成提交或中止（回滚）事务。<a href="https://en.wikipedia.org/wiki/Two-phase_commit_protocol">1</a></p>
+</blockquote>
+
+<p>2PC包含两个阶段：</p>
+<ul>
+  <li><strong>投票阶段</strong> 协调器向所有服务发起投票请求，服务回答yes或no。如果有任何服务回复no以拒绝或超时，协调器则在下一阶段发送中止消息。</li>
+</ul>
+
+<p><img src="/assets/images/saga.2pc.phase1.png" alt="voting phase" class="align-center" /></p>
+
+<ul>
+  <li><strong>决定阶段</strong> 如果所有服务都回复yes，协调器则向服务发送commit消息，接着服务告知事务完成或失败。如果任何服务提交失败，
+协调器将启动额外的步骤以中止该事务。</li>
+</ul>
+
+<p><img src="/assets/images/saga.2pc.phase2.png" alt="decision phase" class="align-center" /></p>
+
+<p>在投票阶段结束之后与决策阶段结束之前，服务处于<strong>不确定</strong>状态，因为他们不确定交易是否继续进行。当服务处于不确定状态并与协调器失去连接时，
+它只能选择等待协调器的恢复，或者咨询其他在确定状态下的服务来得知协调器的决定。在最坏的情况下，
+n个处于不确定状态的服务向其他n-1个服务咨询将产生<strong>O(n<sup>2</sup>)</strong>个消息。</p>
+
+<p>另外，2PC是一个阻塞协议。服务在投票后需要等待协调器的决定，此时服务会阻塞并锁定资源。由于其阻塞机制和最差时间复杂度高，
+2PC不能适应随着事务涉及的服务数量增加而扩展的需要。</p>
+
+<p>有关2PC实现的更多细节可参考<a href="https://cs.nyu.edu/courses/spring03/G22.2631-001/lecture8.pdf">2</a>和<a href="http://courses.cs.vt.edu/~cs5204/fall00/distributedDBMS/duckett/tpcp.html">3</a>。</p>
+
+<h2 id="try-confirmcancel-tcc">Try-Confirm/Cancel (TCC)</h2>
+<p>TCC也是补偿型事务模式，支持两阶段的商业模型。</p>
+<ul>
+  <li><strong>尝试阶段</strong> 将服务置于待处理状态。例如，收到尝试请求时，航班预订服务将为客户预留一个座位，并在数据库插入客户预订记录，将记录设为预留状态。
+如果任何服务失败或超时，协调器将在下一阶段发送取消请求。</li>
+</ul>
+
+<p><img src="/assets/images/saga.tcc.try.png" alt="try phase" class="align-center" /></p>
+
+<ul>
+  <li><strong>确认阶段</strong> 将服务设为确认状态。确认请求将确认客户预订的座位，这时服务已可向客户收取机票费用。数据库中的客户预订记录也会被更新为确认状态。
+如果任何服务无法确认或超时，协调器将重试确认请求直到成功，或在重试了一定次数后采取回退措施，比如人工干预。</li>
+</ul>
+
+<p><img src="/assets/images/saga.tcc.confirm.png" alt="confirm phase" class="align-center" /></p>
+
+<p>与saga相比，TCC的优势在于，尝试阶段将服务转为待处理状态而不是最终状态，这使得设计相应的取消操作轻而易举。</p>
+
+<p>例如，电邮服务的尝试请求可将邮件标记为准备发送，并且仅在确认后发送邮件，其相应的取消请求只需将邮件标记为已废弃。但如果使用saga，
+事务将发送电子邮件，及其相应的补偿事务可能需要发送另一封电子邮件作出解释。</p>
+
+<p>TCC的缺点是其两阶段协议需要设计额外的服务待处理状态，以及额外的接口来处理尝试请求。另外，TCC处理事务请求所花费的时间可能是saga的两倍，
+因为TCC需要与每个服务进行两次通信，并且其确认阶段只能在收到所有服务对尝试请求的响应后开始。</p>
+
+<p>有关TCC的更多细节可参考<a href="https://www.infoq.com/presentations/Transactions-HTTP-REST">Transactions for the REST of Us</a>.</p>
+
+<h2 id="事件驱动的架构">事件驱动的架构</h2>
+<p>和TCC一样，在事件驱动的架构中，长活事务涉及的每个服务都需要支持额外的待处理状态。接收到事务请求的服务会在其数据库中插入一条新的记录，
+将该记录状态设为待处理并发送一个新的事件给事务序列中的下一个服务。</p>
+
+<p>因为在插入记录后服务可能崩溃，我们无法确定是否新事件已发送，所以每个服务还需要额外的事件表来跟踪当前长活事务处于哪一步。</p>
+
+<p><img src="/assets/images/saga.event.driven.request.png" alt="event driven architecture - request" class="align-center" /></p>
+
+<p>一旦长活事务中的最后一个服务完成其子事务，它将通知它在事务中的前一个服务。接收到完成事件的服务将其在数据库中的记录状态设为完成。</p>
+
+<p><img src="/assets/images/saga.event.driven.response.png" alt="event driven architecture - response" class="align-center" /></p>
+
+<p>如果仔细比较，事件驱动的架构就像非集中式的基于事件的TCC实现。如果去掉待处理状态而直接把服务记录设为最终状态，这个架构就像非集中式的基于事件的saga实现。
+去中心化能达到服务自治，但也造成了服务之间更紧密的的耦合。假设新的业务需求在服务B和C之间的增加了新的流程D。在事件驱动架构下，服务B和C必须改动代码以适应新的流程D。</p>
+
+<p><img src="/assets/images/saga.event.coupling.png" alt="event driven architecture - coupling" class="align-center" /></p>
+
+<p>Saga则正好相反，所有这些耦合都在saga系统中，当在长活事务中添加新流程时，现有服务不需要任何改动。</p>
+
+<p>更多细节可参考<a href="https://www.nginx.com/blog/event-driven-data-management-microservices/">Event-Driven Data Management for Microservices</a>.</p>
+
+<h2 id="集中式与非集中式实现">集中式与非集中式实现</h2>
+<p>这个Saga系列的文章讨论的都是集中式的saga设计。但saga也可用非集中式的方案来实现。那么非集中式的版本有什么不同？</p>
+
+<p>非集中式saga没有专职的协调器。启动下一个服务调用的服务就是当前的协调器。例如，</p>
+<ul>
+  <li>服务A收到要求服务A，B和C之间的数据一致性的事务请求。</li>
+  <li>A完成其子事务，并将请求传递给事务中的下一个服务，服务B.</li>
+  <li>B完成其子事务，并将请求传递给C，依此类推。</li>
+  <li>如果C处理请求失败，B有责任启动补偿事务，并要求A回滚。</li>
+</ul>
+
+<p><img src="/assets/images/saga.decentralized.png" alt="decentralized saga" class="align-center" /></p>
+
+<p>与集中式相比，非集中式的实现具有服务自治的优势。但每个服务都需要包含数据一致性协议，并提供其所需的额外持久化设施。</p>
+
+<p>我们更倾向于自治的业务服务，但服务还关联很多应用的复杂性，如数据一致性，服务监控和消息传递，
+将这些棘手问题集中处理，能将业务服务从应用的复杂性中释放，专注于处理复杂的业务，因此我们采用了集中式的saga设计。</p>
+
+<p>另外，随着长活事务中涉及的服务数量增长，服务之间的关系变得越来越难理解，很快便会呈现下图的死星形状。</p>
+
+<p class="figure-caption"><img src="/assets/images/saga.death.star.png" alt="death star architecture" class="align-center" />
+图片来源: http://www.slideshare.net/BruceWong3/the-case-for-chaos (s12)</p>
+
+<p>同时，在长活事务中定位问题也变得更加复杂，因为服务日志遍布群集节点。</p>
+
+<h2 id="summary">Summary</h2>
+<p>本文将saga与其他数据一致性解决方案进行了比较。Saga比两阶段提交更易扩展。在事务可补偿的情况下，
+相比TCC，saga对业务逻辑几乎没有改动的需要，而且性能更高。集中式的saga设计解耦了服务与数据一致性逻辑及其持久化设施，
+并使排查事务中的问题更容易。</p>
+
+<h2 id="references">References</h2>
+<ol>
+  <li><a href="https://en.wikipedia.org/wiki/Two-phase_commit_protocol">https://en.wikipedia.org/wiki/Two-phase_commit_protocol</a></li>
+  <li><a href="https://cs.nyu.edu/courses/spring03/G22.2631-001/lecture8.pdf">https://cs.nyu.edu/courses/spring03/G22.2631-001/lecture8.pdf</a></li>
+  <li><a href="http://courses.cs.vt.edu/~cs5204/fall00/distributedDBMS/duckett/tpcp.html">http://courses.cs.vt.edu/~cs5204/fall00/distributedDBMS/duckett/tpcp.html</a></li>
+  <li><a href="https://www.infoq.com/presentations/Transactions-HTTP-REST">https://www.infoq.com/presentations/Transactions-HTTP-REST</a></li>
+  <li><a href="https://www.nginx.com/blog/event-driven-data-management-microservices/">https://www.nginx.com/blog/event-driven-data-management-microservices/</a></li>
+</ol>
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+<h2 id="入门">入门</h2>
+<p>Apache ServiceComb 是一个微服务的开源解决方案。其包含多个组件，通过组件之间的搭配，可以灵活的应对不同的场景。本指南可以帮助你快速的使用 Apache ServiceComb，针对初次使用的用户，这是开始尝试的最佳入口。</p>
+<ol>
+  <li>下载 <a href="/cn/release/">ServiceComb 发布版本</a>组件</li>
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+  <li>相应开发语言的快速入门说明进行使用
+    <ul>
+      <li><a href="/cn/docs/quick-start/">Java微服务开发框架 Java-Chassis</a></li>
+      <li><a href="/cn/docs/mesher-quick-start/">多语言运行环境 mesher</a></li>
+    </ul>
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+<a href="/cn/docs/toolkit/quick-start/">一键微服务开发工具 Toolkit</a></li>
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+</ol>
+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="单体应用利用ServiceComb实现微服务化和云化之路">
+    <meta itemprop="description" content="该文档演示：从已有基于spring boot的单体应用利用ServiceComb实现微服务化和云化之路">
+    <meta itemprop="datePublished" content="June 24, 2017">
+    <meta itemprop="dateModified" content="June 24, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">单体应用利用ServiceComb实现微服务化和云化之路
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="背景">背景</h2>
+
+<ol>
+  <li>
+    <p>Service Stage：微服务云应用平台，它是面向企业及开发者的一站式DevOps平台服务，支持基于微服务的应用开发、治理、部署及运维监控的全生命周期管理，并提供大规模容器集群管理及中间件服务等平台能力，帮助用户快速构建云分布式应用。</p>
+  </li>
+  <li>
+    <p>本指导以Acmeair demo的部署为例，演示如何使用ServiceComb (华为微服务框架开源版本)实现应用的微服务化，并利用Service Stage云平台上实现应用的云化。</p>
+  </li>
+</ol>
+
+<h2 id="服务化和云化步骤">服务化和云化步骤</h2>
+
+<ul>
+  <li>
+    <p>环境准备：基于Service Stage完成创建集群、添加节点等资源准备工作</p>
+  </li>
+  <li>
+    <p>微服务开发</p>
+
+    <ol>
+      <li>
+        <p>微服务的拆分设计</p>
+      </li>
+      <li>
+        <p>基于ServiceComb框架快速微服务化</p>
+      </li>
+      <li>
+        <p>制作镜像上传Service Stage软件仓库；</p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>应用上线：通过Service Stage从软件仓库获取版本实现部署上线；</p>
+  </li>
+  <li>
+    <p>应用运维：通过Service Stage对微服务或应用进行生命周期管理（部署-启动-上线-升级-扩容-停止-下线-删除）、告警、监控、调用链分析和治理等。</p>
+  </li>
+</ul>
+
+<h2 id="环境准备创建集群添加节点完成节点自动纳管">环境准备：创建集群、添加节点，完成节点自动纳管</h2>
+<h3 id="创建集群">创建集群</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053496188.html">创建集群详细指导</a><br />
+<img src="/assets/images/create-group.png" alt="create group" class="align-center" /></p>
+
+<h3 id="添加节点">添加节点</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053443149.html">为集群添加节点详细指导</a> <br />
+<img src="/assets/images/add-node.png" alt="add node" class="align-center" /></p>
+
+<h2 id="微服务开发">微服务开发</h2>
+<h3 id="应用架构设计划分微服务识别服务依赖关系">应用架构设计，划分微服务，识别服务依赖关系</h3>
+<p><img src="/assets/images/micro-service-design.png" alt="micro service design" class="align-center" /></p>
+
+<h3 id="创建微服务-单体应用微服务应用">创建微服务: 单体应用—&gt;微服务应用</h3>
+<p><img src="/assets/images/micro-service-structure.PNG" alt="micro service structure" class="align-center" /></p>
+
+<h3 id="简单4步servicecomb帮你完成微服务化改造">简单4步ServiceComb帮你完成微服务化改造</h3>
+<h4 id="step-1-pom引入对servicecomb的依赖">Step 1: POM引入对ServiceComb的依赖</h4>
+<p><img src="/assets/images/pom-dependence.png" alt="pom dependence" class="align-center" /></p>
+
+<h4 id="step-2-增加微服务描述文件和spring配置文件">Step 2 增加微服务描述文件和spring配置文件</h4>
+<p><img src="/assets/images/config-file.png" alt="config file" class="align-center" /></p>
+
+<h4 id="step-3-引入servicecomb注解一行代码完成服务发布">Step 3: 引入ServiceComb注解一行代码完成服务发布</h4>
+<p><img src="/assets/images/code-adjust.png" alt="code adjust" class="align-center" /></p>
+
+<h4 id="step-4-使用servicecomb接口简单创建resttemplate完成服务消费也支持注解方式进行消费">Step 4: 使用ServiceComb接口简单创建RestTemplate完成服务消费（也支持注解方式进行消费）</h4>
+<p><img src="/assets/images/service-consumer.png" alt="service consumer" class="align-center" /></p>
+
+<h3 id="制作镜像上传到云镜像中心">制作镜像上传到云镜像中心</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0055101643.html">上传镜像详细指导</a><br />
+<img src="/assets/images/image-upload-1.png" alt="image upload 1" class="align-center" /><br />
+<img src="/assets/images/image-upload-2.png" alt="image upload 2" class="align-center" /></p>
+
+<h2 id="应用上线利用应用管理实现部署上线">应用上线：利用应用管理实现部署上线</h2>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/user_deployService.html">部署微服务详细指导</a> <br />
+<img src="/assets/images/service-deploy.png" alt="service deploy" class="align-center" /></p>
+
+<h2 id="应用运维保障应用平稳运行">应用运维：保障应用平稳运行</h2>
+<h3 id="微服务调用链分析">微服务调用链分析</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053555508.html">应用调用分析详细指导</a><br />
+ <img src="/assets/images/service-monitor-1.png" alt="service monitor 1" class="align-center" /></p>
+
+<h3 id="微服务状态监控">微服务状态监控</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053555506.html">应用监控详细指导</a><br />
+<img src="/assets/images/service-monitor-2.png" alt="service monitor 2" class="align-center" /></p>
+
+<h3 id="按需弹性伸缩">按需弹性伸缩</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0054051691.html">弹性伸缩详细指导</a><br />
+<img src="/assets/images/scaling.png" alt="scaling" class="align-center" /></p>
+
+<h3 id="微服务可视化治理">微服务可视化治理</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053560172.html">微服务管理详细指导</a><br />
+<img src="/assets/images/governance.png" alt="governance" class="align-center" /></p>
+
+<h1 id="acmeair本地运行">Acmeair本地运行</h1>
+<p>本章节介绍在windows 64位环境下如何本地运行Acmeair</p>
+
+<h2 id="环境准备">环境准备</h2>
+
+<ul>
+  <li>
+    <p>JDK 1.8</p>
+  </li>
+  <li>
+    <p>maven 3.x</p>
+  </li>
+  <li>
+    <p>eclipse</p>
+  </li>
+  <li>
+    <p>service-center</p>
+
+    <p> 下载<a href="https://github.com/apache/incubator-servicecomb-service-center/releases">service-center-x.x.x-x-windows-amd64.zip</a>解压到任意目录</p>
+  </li>
+  <li>
+    <p>mongodb（可选）</p>
+  </li>
+  <li>
+    <p>下载<a href="https://github.com/TankTian/acmeair/archive/master.zip">acmeair源码</a></p>
+  </li>
+</ul>
+
+<h2 id="导入项目并构建">导入项目并构建</h2>
+<h3 id="将acmeair项目导入eclipse">将acmeair项目导入eclipse</h3>
+<p>Import - - Maven:Existing Maven Projects，选择代码所在的目录，点击finish完成导入  <br />
+<img src="/assets/images/import-project.png" alt="import project" class="align-center" /></p>
+
+<h3 id="pom文件报错missing-artifac-comhuaweipaascsexxxxx">pom文件报错，Missing artifac com.huawei.paas.cse:xxx:xx</h3>
+<p>该缺少的jar包为商业版本特性，请联系华为公有云 Service Stage 团队获取（此jar上云必选，否则无法使用Service Stage service centerc/config center/调用链等特性；本地调试时huawei商业版本的几个包依赖可以去掉，可以实现本地的服务发现和注册）。<br />
+如果需要将jar包复制到maven本地仓库中，具体包列表如下：<br />
+<img src="/assets/images/jar-list.png" alt="jar-list" class="align-center" /><br />
+eclipse中更新工程：Maven - - Update Project…</p>
+
+<h3 id="修改微服务描述文件">修改微服务描述文件</h3>
+
+<ol>
+  <li>
+    <p>acmeair-booking-service\src\main\resources\microservice.yaml<br />
+<img src="/assets/images/booking-microservice-yaml.png" alt="booking microservice yaml" class="align-center" /></p>
+  </li>
+  <li>
+    <p>acmeair-customer-service\src\main\resources\microservice.yaml <br />
+<img src="/assets/images/customer-microservice-yaml.png" alt="customer microservice yaml" class="align-center" /></p>
+  </li>
+  <li>
+    <p>acmeair-website\src\main\resources\microservice.yaml<br />
+<img src="/assets/images/website-microservice-yaml.png" alt="website microservice yaml" class="align-center" /></p>
+  </li>
+</ol>
+
+<h3 id="执行-mvn-install-结果-build-success-项目导入完成并成功构建">执行 mvn install 结果 BUILD SUCCESS ，项目导入完成并成功构建</h3>
+<p><img src="/assets/images/compile.png" alt="compile" class="align-center" /></p>
+
+<h2 id="启动服务">启动服务</h2>
+<h3 id="service-center">service-center</h3>
+<p>找到service-center-0.1.0-m1-windows-amd64解压目录，双击start.bat<br />
+<img src="/assets/images/servcie-center.png" alt="servcie center" class="align-center" /> <br />
+<img src="/assets/images/service-center-start-success.png" alt="service center start success" class="align-center" /></p>
+
+<h3 id="acmeair-booking">acmeair-booking</h3>
+<p>AcmeairApplication:Run As - - Run Configurations…<br />
+<img src="/assets/images/start-booking.png" alt="start booking" class="align-center" />  <br />
+watching microservice 2 successfully，服务注册成功<br />
+<img src="/assets/images/booking-start-success.png" alt="booking start success" class="align-center" /></p>
+
+<h3 id="acmeair-customer">acmeair-customer</h3>
+<p>CustomerServiceApplication:Run As - - Run Configurations…<br />
+<img src="/assets/images/start-customer.png" alt="start customer" class="align-center" /> <br />
+watching microservice 4 successfully，服务注册成功<br />
+<img src="/assets/images/customer-start-success.png" alt="customer start success" class="align-center" /></p>
+
+<h3 id="acmeair-website">acmeair-website</h3>
+<p>将acmeair-website\target\ROOT.war复制到tomcat webapps文件夹下，启动tomcat<br />
+<img src="/assets/images/start-website.png" alt="start website" class="align-center" /></p>
+
+<h2 id="前台访问">前台访问</h2>
+<p>输入http://localhost:8080<br />
+<img src="/assets/images/home-page.png" alt="home page" class="align-center" /></p>
+
+<p>点击网页最下端Acme航空配置<br />
+<img src="/assets/images/init-data.png" alt="init data" class="align-center" /></p>
+
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+    <meta itemprop="headline" content="如何给微服务架构的项目做验收测试？">
+    <meta itemprop="description" content="本文将介绍如何给微服务架构的项目做验收测试">
+    <meta itemprop="datePublished" content="July 04, 2019">
+    <meta itemprop="dateModified" content="July 04, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">如何给微服务架构的项目做验收测试？
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h3 id="如何给微服务架构的项目做验收测试">如何给微服务架构的项目做验收测试？</h3>
+
+<p>基于微服务架构的应用相对于单体架构的应用而言在验收测试阶段具有以下挑战：</p>
+
+<ol>
+  <li>复数的服务增加了测试环境搭建的难度</li>
+  <li>各种异常情况的模拟变得困难，基于Mock的测试方式无法对整个调用链路作异常模拟，进而使得对整体架构的健壮性测试变得困难</li>
+  <li>基于成本和效率的原因，测试工作已经不适合通过人工完成</li>
+</ol>
+
+<p>我们认为对基于微服务架构的应用的验收测试应该具有以下特征：</p>
+
+<ol>
+  <li>自动化、可重复、易于和CI工具集成</li>
+  <li>能够在测试运行时修改服务的行为</li>
+</ol>
+
+<p>下面将就一个Demo来介绍如何利用 <a href="https://www.docker.com/">Docker [1]</a>、<a href="https://cucumber.io/">Cucumber [2]</a>、<a href="https://byteman.jboss.org/">Byteman [3]</a>、<a href="https://dmp.fabric8.io/">Fabric8 docker-maven-plugin [4]</a>、<a href="https://github.com/spotify/dockerfile-maven">Spotify dockerfile-maven-plugin [5]</a>达成以上目标。</p>
+
+<h3 id="demo介绍">Demo介绍</h3>
+
+<p>一共有两个服务Product Service（商品服务）和Product Price Service（商品价格服务），Product Service提供了一个查询接口用于获得商品信息及其价格信息的组合结果，这相当于跨服务的SQL JOIN。</p>
+
+<p>下面是Product的Schema：</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+  </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="p">,</span><span class="w">
+  </span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="p">,</span><span class="w">
+  </span><span class="nl">"description"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>下面是ProductPrice的Schema：</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+  </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="p">,</span><span class="w">
+  </span><span class="nl">"price"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;number&gt;"</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>Product Service返回的Schema则是：</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+  </span><span class="nl">"products"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+    </span><span class="p">{</span><span class="w">
+      </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="p">,</span><span class="w">
+      </span><span class="nl">"name"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="p">,</span><span class="w">
+      </span><span class="nl">"description"</span><span class="p">:</span><span class="w"> </span><span class="s2">"&lt;string&gt;"</span><span class="p">,</span><span class="w">
+      </span><span class="nl">"price"</span><span class="p">:</span><span class="w"> </span><span class="err">&lt;number&gt;</span><span class="w">
+    </span><span class="p">}</span><span class="w">
+  </span><span class="p">]</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>该接口的实现逻辑是：</p>
+
+<ol>
+  <li>Product Service本地查询得到Product List</li>
+  <li>Product Service调用Product Price Service接口得到ProductPrice List</li>
+  <li>拼装结果</li>
+</ol>
+
+<p>此外还有一个要求，当Product Price Service出现异常时，Product Service依然要能够返回结果，只不过<code class="highlighter-rouge">price</code>字段为<code class="highlighter-rouge">null</code>，即无论如何Product Service都要能够返回结果。</p>
+
+<h3 id="实现步骤">实现步骤</h3>
+
+<h4 id="构建docker-image">构建Docker Image</h4>
+
+<p>为了能够便利地搭建测试环境，我们需要先为Product Servcie和Product Price Service构建Docker Image。利用<a href="https://github.com/spotify/dockerfile-maven">Spotify dockerfile-maven-plugin [5]</a>可以很方便地做到这一点，它没有引入额外的概念，只要你会写<a href="https://docs.docker.com/engine/reference/builder/">Dockerfile [6]</a>就行。我们在Product Service和Producer Price Service的<code class="highlighter-rouge">pom.xml</code>中添加类似以下的配置：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>com.spotify<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>dockerfile-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>${dockerfile-maven-plugin.version}<span class="nt">&lt;/version&gt;</span>
+  <span class="nt">&lt;configuration&gt;</span>
+    <span class="nt">&lt;repository&gt;</span>msat-${project.artifactId}<span class="nt">&lt;/repository&gt;</span>
+    <span class="nt">&lt;tag&gt;</span>${project.version}<span class="nt">&lt;/tag&gt;</span>
+    <span class="nt">&lt;buildArgs&gt;</span>
+      <span class="nt">&lt;JAR_FILE&gt;</span>${project.build.finalName}-exec.${project.packaging}<span class="nt">&lt;/JAR_FILE&gt;</span>
+    <span class="nt">&lt;/buildArgs&gt;</span>
+  <span class="nt">&lt;/configuration&gt;</span>
+  <span class="nt">&lt;executions&gt;</span>
+    <span class="nt">&lt;execution&gt;</span>
+      <span class="nt">&lt;id&gt;</span>build<span class="nt">&lt;/id&gt;</span>
+      <span class="nt">&lt;phase&gt;</span>package<span class="nt">&lt;/phase&gt;</span>
+      <span class="nt">&lt;goals&gt;</span>
+        <span class="nt">&lt;goal&gt;</span>build<span class="nt">&lt;/goal&gt;</span>
+      <span class="nt">&lt;/goals&gt;</span>
+    <span class="nt">&lt;/execution&gt;</span>
+  <span class="nt">&lt;/executions&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>并且提供了Dockerfile：</p>
+
+<pre><code class="language-txt">FROM openjdk:8-jre-alpine
+ARG JAR_FILE
+ENV JAR_FILE=${JAR_FILE}
+RUN mkdir /maven
+COPY target/${JAR_FILE} /maven
+COPY target/lib/byteman.jar /maven
+ENTRYPOINT java $JAVA_OPTS -jar /maven/$JAR_FILE
+EXPOSE 8080
+</code></pre>
+
+<p>注意我们在Image中添加了byteman.jar，利用它我们可以在运行时修改程序的行为。</p>
+
+<h4 id="编写验收测试脚本">编写验收测试脚本</h4>
+
+<p>我们新建一个验收测试的Maven项目，然后使用<a href="https://cucumber.io/">Cucumber [2]</a>编写了以下两个场景的验收测试脚本：</p>
+
+<p>正常情况：</p>
+
+<pre><code class="language-txt">Feature: List product information with price
+
+  Scenario: Everything is good
+    Given Product Service is up and running
+    And Product Price Service is up and running
+
+    When User query product list
+
+    Then Get following products
+
+      | id       | name | description            | price |
+      | animal-1 | dog  | woof woof              | 1000  |
+      | animal-2 | duck | quack quack            | 40    |
+      | animal-3 | fox  | what does the fox say? | 5000  |
+</code></pre>
+
+<p>这个脚本的大致意思是在Product Service和Product Price Service都启动的情况下，当用户查询Product信息时，我们会得到上述表格中的结果。</p>
+
+<p>Product Price Service异常情况：</p>
+
+<pre><code class="language-txt">Feature: List product information with price
+
+  Scenario: Product Price Service throws exception when being queried
+    Given Product Service is up and running
+    And Product Price Service is up and running
+
+    Given Install the byteman script product_price_exception.btm to Product Price Service
+
+    When User query product list
+
+    Then Get following products
+
+      | id       | name | description            | price |
+      | animal-1 | dog  | woof woof              |       |
+      | animal-2 | duck | quack quack            |       |
+      | animal-3 | fox  | what does the fox say? |       |
+</code></pre>
+
+<p>注意到我们在这里使用了<a href="https://byteman.jboss.org/">Byteman [3]</a>注入了异常情况给Product Price Service：</p>
+
+<pre><code class="language-txt">Given Install the byteman script product_price_exception.btm to Product Price Service
+</code></pre>
+
+<p><code class="highlighter-rouge">product_price_exception.btm</code>的内容是这样的：</p>
+
+<pre><code class="language-txt">RULE throw exception
+CLASS me.chanjar.msat.productprice.FakeProductPriceRepository
+METHOD listAll
+AT ENTRY
+IF TRUE
+DO debug("throw RuntimeException here"),
+   throw new RuntimeException("Product Repository Error!")
+ENDRULE
+</code></pre>
+
+<p>意思是在调用<code class="highlighter-rouge">FakeProductPriceRepository.listAll</code>方法时抛出异常，注意这样做并没有修改Product Price Service的源码，而是在运行时修改了它的逻辑。</p>
+
+<p>接下来我们为上面的验收测试脚本实现逻辑（下面代码与实际上有所不同，这是为了尽量使得代码篇幅精简）：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">Stepdefs</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">String</span><span class="o">&gt;&gt;</span> <span class="n">answer</span><span class="o">;</span>
+
+  <span class="nd">@Given</span><span class="o">(</span><span class="s">"^Product Service is up and running$"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">productServiceIsUpAndRunning</span><span class="o">()</span> <span class="o">{</span>
+    <span class="n">probe</span><span class="o">(</span><span class="s">"Product Service"</span><span class="o">,</span> <span class="no">PRODUCT_ADDRESS</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@And</span><span class="o">(</span><span class="s">"^Product Price Service is up and running$"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">productPriceServiceIsUpAndRunning</span><span class="o">()</span> <span class="o">{</span>
+    <span class="n">probe</span><span class="o">(</span><span class="s">"Product Price Service"</span><span class="o">,</span> <span class="no">PRODUCT_PRICE_ADDRESS</span><span class="o">);</span>
+    <span class="n">clearBytemanScript</span><span class="o">();</span>
+  <span class="o">}</span>
+
+  <span class="nd">@When</span><span class="o">(</span><span class="s">"^User query product list$"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">queryProductList</span><span class="o">()</span> <span class="o">{</span>
+    <span class="n">answer</span> <span class="o">=</span> <span class="n">given</span><span class="o">()</span>
+      <span class="o">.</span><span class="na">when</span><span class="o">()</span>
+      <span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="no">PRODUCT_ADDRESS</span> <span class="o">+</span> <span class="s">"/products"</span><span class="o">)</span>
+      <span class="o">.</span><span class="na">then</span><span class="o">()</span>
+      <span class="o">.</span><span class="na">statusCode</span><span class="o">(</span><span class="n">is</span><span class="o">(</span><span class="mi">200</span><span class="o">))</span>
+      <span class="o">.</span><span class="na">extract</span><span class="o">()</span>
+      <span class="o">.</span><span class="na">body</span><span class="o">()</span>
+      <span class="o">.</span><span class="na">jsonPath</span><span class="o">()</span>
+      <span class="o">.</span><span class="na">getList</span><span class="o">(</span><span class="s">"products"</span><span class="o">,</span> <span class="nc">Map</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Given</span><span class="o">(</span><span class="s">"^Install the byteman script ([A-Za-z0-9_\\.]+) to Product Price Service$"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">injectExceptionIntoProductPriceService</span><span class="o">(</span><span class="nc">String</span> <span class="n">bytemanScript</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+    <span class="n">injectBytemanScript</span><span class="o">(</span><span class="s">"target/test-classes/"</span> <span class="o">+</span> <span class="n">bytemanScript</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Then</span><span class="o">(</span><span class="s">"^Get following products$"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">compareResult</span><span class="o">(</span><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">String</span><span class="o">&gt;&gt;</span> <span class="n">expected</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">assertThat</span><span class="o">(</span><span class="n">answer</span><span class="o">).</span><span class="na">containsExactlyInAnyOrderElementsOf</span><span class="o">(</span><span class="n">expected</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>关于<a href="https://cucumber.io/">Cucumber [2]</a>和<a href="https://byteman.jboss.org/">Byteman [3]</a>的更详细的介绍可以见<a href="https://servicecomb.apache.org/cn/docs/saga_with_cucumber/">ServiceComb Saga使用Cucumber做验收测试源码分析 [7]</a>。</p>
+
+<h4 id="自动化搭建测试环境">自动化搭建测试环境</h4>
+
+<p>我们希望能够在Maven的<code class="highlighter-rouge">integration-test</code> 阶段搭建测试环境、执行上述验收测试脚本。在<code class="highlighter-rouge">pom.xml</code>中添加到<a href="https://dmp.fabric8.io/">Fabric8 docker-maven-plugin [4]</a>：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>io.fabric8<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>docker-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;configuration&gt;</span>
+    <span class="nt">&lt;showLogs&gt;</span>true<span class="nt">&lt;/showLogs&gt;</span>
+    <span class="nt">&lt;images&gt;</span>
+      <span class="nt">&lt;image&gt;</span>
+        <span class="nt">&lt;name&gt;</span>msat-product:${project.version}<span class="nt">&lt;/name&gt;</span>
+        <span class="nt">&lt;alias&gt;</span>msat-product<span class="nt">&lt;/alias&gt;</span>
+        <span class="nt">&lt;run&gt;</span>
+          <span class="nt">&lt;wait&gt;</span>
+            <span class="nt">&lt;log&gt;</span>Started [a-zA-Z]+ in [0-9.]+ seconds<span class="nt">&lt;/log&gt;</span>
+            <span class="nt">&lt;time&gt;</span>120000<span class="nt">&lt;/time&gt;</span>
+          <span class="nt">&lt;/wait&gt;</span>
+          <span class="nt">&lt;links&gt;</span>
+            <span class="nt">&lt;link&gt;</span>msat-product-price:msat-product-price<span class="nt">&lt;/link&gt;</span>
+          <span class="nt">&lt;/links&gt;</span>
+          <span class="nt">&lt;ports&gt;</span>
+            <span class="nt">&lt;port&gt;</span>product.port:8080<span class="nt">&lt;/port&gt;</span>
+          <span class="nt">&lt;/ports&gt;</span>
+        <span class="nt">&lt;/run&gt;</span>
+      <span class="nt">&lt;/image&gt;</span>
+      <span class="nt">&lt;image&gt;</span>
+        <span class="nt">&lt;name&gt;</span>msat-product-price:${project.version}<span class="nt">&lt;/name&gt;</span>
+        <span class="nt">&lt;alias&gt;</span>msat-product-price<span class="nt">&lt;/alias&gt;</span>
+        <span class="nt">&lt;run&gt;</span>
+          <span class="nt">&lt;env&gt;</span>
+            <span class="nt">&lt;JAVA_OPTS&gt;</span>
+              -Dorg.jboss.byteman.debug=true -Dorg.jboss.byteman.verbose=true
+              -javaagent:/maven/byteman.jar=port:9091,address:0.0.0.0,listener:true
+            <span class="nt">&lt;/JAVA_OPTS&gt;</span>
+          <span class="nt">&lt;/env&gt;</span>
+          <span class="nt">&lt;wait&gt;</span>
+            <span class="nt">&lt;log&gt;</span>Started [a-zA-Z]+ in [0-9.]+ seconds<span class="nt">&lt;/log&gt;</span>
+            <span class="nt">&lt;time&gt;</span>120000<span class="nt">&lt;/time&gt;</span>
+          <span class="nt">&lt;/wait&gt;</span>
+          <span class="nt">&lt;ports&gt;</span>
+            <span class="nt">&lt;port&gt;</span>product-price.port:8080<span class="nt">&lt;/port&gt;</span>
+            <span class="nt">&lt;port&gt;</span>product-price.byteman.port:9091<span class="nt">&lt;/port&gt;</span>
+          <span class="nt">&lt;/ports&gt;</span>
+        <span class="nt">&lt;/run&gt;</span>
+      <span class="nt">&lt;/image&gt;</span>
+    <span class="nt">&lt;/images&gt;</span>
+  <span class="nt">&lt;/configuration&gt;</span>
+  <span class="nt">&lt;executions&gt;</span>
+    <span class="nt">&lt;execution&gt;</span>
+      <span class="nt">&lt;id&gt;</span>start<span class="nt">&lt;/id&gt;</span>
+      <span class="nt">&lt;phase&gt;</span>pre-integration-test<span class="nt">&lt;/phase&gt;</span>
+      <span class="nt">&lt;goals&gt;</span>
+        <span class="nt">&lt;goal&gt;</span>start<span class="nt">&lt;/goal&gt;</span>
+      <span class="nt">&lt;/goals&gt;</span>
+    <span class="nt">&lt;/execution&gt;</span>
+    <span class="nt">&lt;execution&gt;</span>
+      <span class="nt">&lt;id&gt;</span>stop<span class="nt">&lt;/id&gt;</span>
+      <span class="nt">&lt;phase&gt;</span>post-integration-test<span class="nt">&lt;/phase&gt;</span>
+      <span class="nt">&lt;goals&gt;</span>
+        <span class="nt">&lt;goal&gt;</span>stop<span class="nt">&lt;/goal&gt;</span>
+      <span class="nt">&lt;/goals&gt;</span>
+    <span class="nt">&lt;/execution&gt;</span>
+  <span class="nt">&lt;/executions&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>这样一来就能够在<code class="highlighter-rouge">pre-integration-test</code>阶段启动容器，在<code class="highlighter-rouge">post-integration-test</code>阶段销毁容器了。</p>
+
+<h4 id="take-a-run">Take a run</h4>
+
+<p>接下来只需要<code class="highlighter-rouge">mvn clean install</code>它就会：</p>
+
+<ol>
+  <li>构建：
+    <ol>
+      <li>构建Product Service项目，并为其构建Docker Image</li>
+      <li>构建Product Price Service项目，并为其构建Docker Image</li>
+    </ol>
+  </li>
+  <li>验收测试：
+    <ol>
+      <li>启动Product Service和Product Price Service的容器</li>
+      <li>执行验收测试脚本</li>
+      <li>销毁上述创建的容器</li>
+    </ol>
+  </li>
+</ol>
+
+<p>如果你想自己试试可以下载<a href="https://github.com/chanjarster/microservice-acceptance-test-demo">本项目源码[8]</a>。</p>
+
+<p>欢迎开发者朋友们加入ServiceComb社区，一起做些有意思的事情。<a href="http://servicecomb.incubator.apache.org/cn/docs/join_the_community/">加入社区方法[9]</a></p>
+
+<h3 id="参考资料">参考资料</h3>
+
+<p>[1] Docker https://www.docker.com/</p>
+
+<p>[2] Cucumber https://cucumber.io/</p>
+
+<p>[3] Byteman  https://byteman.jboss.org/</p>
+
+<p>[4] Fabric8 docker-maven-plugin  https://dmp.fabric8.io/</p>
+
+<p>[5] Spotify dockerfile-maven-plugin https://github.com/spotify/dockerfile-maven</p>
+
+<p>[6] Dockerfile https://docs.docker.com/engine/reference/builder/</p>
+
+<p>[7] ServiceComb Saga使用Cucumber做验收测试源码分析 https://servicecomb.apache.org/cn/docs/saga_with_cucumber/</p>
+
+<p>[8] 本项目源码 https://github.com/chanjarster/microservice-acceptance-test-demo</p>
+
+<p>[9] 加入Servicecomb社区  http://servicecomb.incubator.apache.org/cn/docs/join_the_community/</p>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
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+    <strong><i class="fa fa-fw fa-tags" aria-hidden="true"></i> 标签: </strong>
+    <span itemprop="keywords">
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+            <h1 class="page__title" itemprop="headline">如何从一名开源小白成长为Apache Committer
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
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+        <h2 id="如何从一名开源小白成长为apache-committer">如何从一名开源小白成长为Apache Committer</h2>
+<p>今天收到了来自Apache Vote我成为Committer的邮件，代表自己的贡献得到了充分的肯定；除了感谢团队的给力支持，我更希望将自己的成长经历——如何践行Apache Way的心得介绍给大家，让大家爱上Apache开源社区，也能和我一样成长为自己喜爱项目的Committer。</p>
+
+<h3 id="根据个人贡献获得价值government-by-merit">根据个人贡献获得价值（Government By Merit）</h3>
+<p>回忆我刚参与ServiceComb项目，面对上万行的存量代码，总觉得无从下手，甚至认为开源社区高手如云，如果没有深厚且对口的技术功底，还是不要来掺和了。</p>
+
+<p>在这个困难而关键的时候，社区导师给了我明确的指导——<strong>不要怕，从小事做起，不要“善小而不为”</strong>。于是我静下心来，在Jira上寻找最简单的任务，主动请缨的<a href="https://github.com/apache/incubator-servicecomb-java-chassis/pull/91">第一个任务</a>是支持配置兼容，具体需求是<code class="highlighter-rouge">cse.xxx</code>配置项和<code class="highlighter-rouge">servicecomb.xxx</code>配置项要具备等同效果，经过一番努力，成功Merge PR ；之后我又接下另一个简单任务，增加一个Annotation用于支持Json String作为请求参数……</p>
+
+<p>Apache Way非常看重个人贡献，没有贡献，一切无从谈起，<strong>与开源软件同行，不仅看你获得了多少，更要坚持长期贡献</strong>，这是它与商业软件最大的不同。贡献并不区分大小，无论是增加重大特性，还是小小的改进、Bug Fix和修订文档错误，这些同样是项目茁壮成长的关键。</p>
+
+<p><strong>实际上大多数开源爱好者都是从修订文档错误开始的</strong>，例如改正错别字、格式不正确以及订正描述等等，我对ServiceComb的理解也绝大多数来自<a href="https://github.com/apache/incubator-servicecomb-website/pulls?q=is%3Apr+is%3Aclosed+author%3Azhengyangyong">这方面的工作</a>；这样不但能够在阅读文档的过程中更快的了解技术细节，也比较容易入手做出贡献。</p>
+
+<p>总之坚持下来，个人积累的贡献慢慢变厚，获得Apache的认可自然水到渠成。</p>
+
+<h3 id="社区驱动community">社区驱动（Community）</h3>
+<p>参与社区是技术成长最快的方式之一，Follow Apache社区的方式有订阅<a href="http://servicecomb.incubator.apache.org/cn/developers/subscribe-mail-list/">邮件列表</a>和加入<a href="http://servicecomb.incubator.apache.org/cn/developers/use-gitter/">Gitter</a>聊天室；从看大家讨论（讨论邮件一般会使用[Discussion]开头），到回答大家的问题（回复邮件和发送Gitter聊天），相信用不了多久你就能收获颇丰，并冒出自己的想法，迈出第一步提交第一个PR也就不难了。</p>
+
+<p><a href="http://servicecomb.incubator.apache.org/">ServiceComb</a>作为一个微服务一站式解决方案，融合侵入式、非侵入式场景并支持多语言，解放开发者，帮助用户和开发者将企业应用轻松微服务化和上云；大家在这里讨论的话题、发起的投票、以及提交的代码，无不与微服务密切相关。在这个社区中我不但学习到了知识，完成了开源（也包含微服务）小白的蜕变，还进一步接受了开源的洗礼——<strong>前辈指导我进步，我将所学传递给新人</strong>；这个过程中我结识了很多新朋友，大家互通有无，不但极大的开阔了视野，也提高了自己的社交能力。</p>
+
+<p>Apache开发者来自全球，社区大多都是用英文来交流。通过阅读<a href="http://servicecomb.incubator.apache.org/users/">英文资料</a>，使用英文在<a href="http://servicecomb.incubator.apache.org/cn/developers/use-gitter/">Gitter</a>上与开发人员直接交流，通过英文邮件来探讨问题，在不知不觉中自己的英文水平也大大提高了。</p>
+
+<h3 id="协作开发collaborative-development">协作开发（Collaborative Development）</h3>
+<p>这也是我极力推荐参与开源社区开发的重要原因之一，<strong>当你提交PR后，无论代码有多么烂，你总能收获宝贵的Comments</strong>，不花钱获得编程大师的指点——教你怎么写出优秀的代码，这是多么合算的买卖！</p>
+
+<p>我在参与ServiceComb社区前，只知道Java基本语法，IDE不熟练（之前一直是用VS写C#，不使用Eclipse和IntelliJ IDEA），不会Git，不懂Maven，还能有更糟糕的起点吗：）</p>
+
+<p>不用担心，社区会指导你。我前文提到的第一个简单的任务，花费了将近一周时间，被打回来了四五次后才被Merge；一个PR收获60+ Comments也是家常便饭。这个过程中我的Java水平成长得飞快，不久后就能独立承担新特性的设计和开发——<a href="http://servicecomb.incubator.apache.org/cn/users/metrics-in-1.0.0-m1/">Metrics</a>，当然，完成这个新特性的过程中Committer和其他开发者给予了很多支持，所以，请大胆的提交你的第一个PR，成为一名Contributor吧。</p>
+
+<h3 id="民主开放和透明consensus-open-and-transparency">民主，开放和透明（Consensus, Open and Transparency）</h3>
+<p>在Apache社区里投票至关重要，你可以感受到你的建议将被充分重视，我很喜欢这种参与感；大家的讨论和建议也完全公开透明，并且能够长时间通过邮件列表查询到，沟通效率非常高。所以大家多多参与，一定能收获惊喜，从万能的社区里寻找自己想要的答案，请记住，<strong>当你对某个问题产生困惑，即使是强大的StackOverflow也不会有原作者的答复更为准确</strong>。</p>
+
+<p>写在最后，我想说从一名开源小白成长为Apache Committer并不是无比艰难又遥不可及的事情，<strong>只需要日积月累的在社区中投入一点业余时间，就能梦想成真</strong>。当然最好找到自己感兴趣的社区，这会让这段旅途更加愉快，也能交到更多志同道合的的朋友。</p>
+
+<blockquote>
+  <p>广告：我所在的Apache ServiceComb正<a href="http://servicecomb.incubator.apache.org/cn/developers/contributing">持续招募贡献者</a>，非常欢迎大家加入，让我们一起构建更好的微服务框架。</p>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="最头疼的遗留系统该如何改造？">
+    <meta itemprop="description" content="微服务是否是业界期待已久的企业架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？">
+    <meta itemprop="datePublished" content="October 23, 2017">
+    <meta itemprop="dateModified" content="October 23, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">最头疼的遗留系统该如何改造？
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>随着RESTful、云计算、DevOps、持续交付等概念的深入人心，微服务（Microservices）逐渐成为系统架构的一个代名词。那么微服务是否是业界期待已久的架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？在该分享中，王磊将通过实际的案例，跟大家探讨使用微服务改造遗留系统的实践之路。</p>
+
+<ul>
+  <li>什么是微服务</li>
+  <li>微服务的诞生背景</li>
+  <li>遗留系统的微服务改造策略</li>
+  <li>微服务改造之路</li>
+</ul>
+
+<h2 id="背景">背景</h2>
+<p>什么是系统架构设计？</p>
+
+<p>一直以来，系统架构设计是IT领域经久不衰的话题之一，是每个系统构建过程中极其关键的一部分，它决定了系统是否能够被正确、有效的构建。架构师们也一直在持续探索，寻找更优秀的架构设计方式来构建系统。</p>
+
+<p>那什么是系统的架构设计？对于这个问题，我相信每个朋友都会有不同的定义，实际上，也并没有一个标准的答案来解释什么是架构设计。</p>
+
+<p>基于我过去的经验和工作方式，我认为系统架构设计的本质，是在应用系统内部找到这样一个动态平衡：平衡业务、技术、团队的同时，考虑系统灵活性、可扩展性以及可维护性等因素，并将应用系统划分成不同的部分，使这些部分彼此之间相互分工、相互协作，从而为用户提供某种特定的价值的方式。</p>
+
+<p>随着RESTful、云计算、DevOps、持续交付等概念的深入人心，<strong>微服务架构逐渐成为系统架构的一个代名词</strong>。</p>
+
+<h2 id="什么是微服务架构">什么是微服务架构</h2>
+<p>2015年，微服务架构这个词，以相当高的频率出现在各种演讲、文章、会议、社区上。这里，我先和大家快速回顾一下，Martin Fowler对微服务的抽象。</p>
+
+<p><img src="/assets/images/microservice_definition_by_martin_folwer.jpeg" alt="" /></p>
+
+<p>如上所示，微服务架构的核心四要素，我用红色标注出来了。如果翻译成中文，大致如下所示：</p>
+
+<blockquote>
+  <p>微服务架构是一种架构模式，它提倡将单一应用程序划分成一组小的服务，服务之间互相协调、互相配合，为用户提供最终价值。 每个服务运行在其独立的进程中，服务与服务间采用轻量级的通信机制互相协作（通常是基于HTTP协议的RESTful API）。 每个服务都围绕着具体业务进行构建，并且能够被独立的部署到生产环境、类生产环境等。 另外，对具体的服务而言，应根据业务上下文，选择合适的语言、工具对其进行构建。</p>
+</blockquote>
+
+<p>总结成一句话就是<strong>微服务是围绕业务构建的细粒度的分布式系统</strong>。</p>
+
+<h2 id="微服务的诞生背景">微服务的诞生背景</h2>
+<p>2015年，微服务突然火了，为什么？</p>
+
+<p>其实微服务架构并不是技术创新，而是IT发展到现阶段对技术架构的一种阐释。</p>
+
+<p>它要求包括<strong>快速和业务对齐（aligning business）、理解和抽象业务（基于领域建模）、快速开发（Lean、Agile）、快速反馈和交付（CI、CD、DevOps）</strong>。</p>
+
+<p>所以说，微服务并不是技术，而是将化整为零（或称分治）思想换了一种说法，无论是把一个大型系统分割成多个小而自治的系统，还是把一个大型团队分成多个团队，或是把一个复杂的项目分成多个交付阶段都是这种思想的运用。</p>
+
+<p>当然，任何新事物的诞生，总会有一个推动因素。微服务的诞生也并非偶然。它是互联网高速发展，技术日新月异的变化以及传统架构无法适应快速变化等多重因素的推动下所诞生的产物。</p>
+
+<p>基于个人的理解，我将微服务的诞生因素总结为如下几点：</p>
+
+<p><img src="/assets/images/why_microservice_show_up.jpeg" alt="" /></p>
+
+<ol>
+  <li>
+    <p><strong>互联网行业的快速发展</strong></p>
+
+    <p>过去的十年中，互联网对我们的生活产生了翻天覆地的变化，越来越多的传统行业公司也开始依赖互联网技术打造其核心竞争优势。</p>
+
+    <p>在这种情况下，如何从系统架构的角度出发，构建灵活、易扩展的系统，快速应对需求的变化；同时，随着用户量的增加，如何保证系统的可伸缩性、高可用性，成为系统架构面临的挑战。</p>
+  </li>
+  <li>
+    <p><strong>单块架构系统面临的挑战</strong></p>
+
+    <p>随着用户需求个性化、产品生命周期变短、市场需求不稳定等因素的出现，单块架构系统面临着越来越多的挑战。如何找到一种更有效的、更灵活、适应需求的系统架构方式，成为大家关注的焦点。</p>
+  </li>
+  <li>
+    <p><strong>敏捷、精益方法、持续交付的深入人心</strong></p>
+
+    <p>在IT行业发展的过去十年，敏捷、精益、持续交付等价值观、方法论的提出以及实践，让很多组织意识到应变市场变化、提高响应力的重要性，应该构建软件交付周期的闭环（分析、开发、测试、部署、运维、监控、运营），而不仅仅是提高开发阶段的效率。</p>
+
+    <p><strong>精益创业（Lean Startup）</strong>帮助组织分析并建立最小可实行产品（MinimumViableProduct），通过迭代持续改进敏捷方法帮助组织消除浪费，通过反馈不断找到正确的方向。</p>
+
+    <p><strong>持续交付</strong>则帮助组织构建更快、更可靠、可频繁发布的交付机制并构建产品交付闭环。</p>
+
+    <p>大部分组织已经基本上形成了一套可实施的交付体系。包括持续集成、自动化测试、数据管理、自动化部署机制等。</p>
+
+    <p>这时候，大泥球式的单块架构，会逐渐成为影响交付周期进一步优化的瓶颈，因此如何找到灵活性高、扩展性好的架构方式，也成为进一步优化交付周期面临的挑战。</p>
+  </li>
+  <li>
+    <p><strong>Docker等容器虚拟化技术的快速发展</strong></p>
+
+    <p>同传统的虚拟化技术相比，基于容器技术的Docker，不需要复杂的Hypervisor机制支持，具有更高的虚拟化性能和效率。</p>
+
+    <p>同时容器可以很容易的运行在任意的装有DockerEngine的系统上，使得开发人员能够用更低的成本将应用程序部署在不同平台上。</p>
+  </li>
+  <li>
+    <p><strong>DevOps文化</strong></p>
+
+    <p>DevOps文化的推行打破了传统开发与运维之间的壁垒，帮助组织形成开发、运维紧密配合的、全功能化的高效团队，并尽早降低软件交付最后一公里的风险。</p>
+  </li>
+</ol>
+
+<h2 id="遗留系统的微服务改造策略">遗留系统的微服务改造策略</h2>
+<p>聊完什么是微服务架构以及其诞生背景，接下来我们来谈谈如何改造遗留系统。</p>
+
+<p>在过去的10多年间，大部分工作时间我都在和遗留系统打交道。我相信很多朋友也是工作在已经运转多年的遗留系统上。</p>
+
+<p>对于这类系统，当谈论使用微服务对其进行改造时，我认为要谨记一点：</p>
+
+<p><strong>改造不是重做。</strong></p>
+
+<p><strong>在改造的过程中，要始终以保证系统为用户提供的业务价值可用作为首要目标。</strong>从这个点出发，基于我的经验，对微服务改造的策略总结为如下五个步骤：</p>
+
+<p><img src="/assets/images/microservice_reform_strategy.jpeg" alt="" /></p>
+
+<ol>
+  <li>
+    <p>范围定义</p>
+
+    <p>对于遗留系统而言，通常业务运转时间较长（譬如5~8年以上，甚至更长），因此涉及的功能繁杂，代码中存在大量无效或者过时的需求，缺陷修复成本较高。</p>
+
+    <p>另外，系统在演进的过程中，也会持续为用户提供新的功能和价值。因此，划分出清晰的范围非常重要。</p>
+
+    <p>实际上，范围定义主要包括两部分：</p>
+
+    <ol>
+      <li>
+        <p>明确业务改造范围</p>
+
+        <p>所谓改造范围，就是确定我们常说的业务试点。通常，作为初次尝试微服务实践的组织，建议选取业务范围影响较小、非关键功能的试点，这样做也是为了确保在不影响核心业务的情况下快速尝试并获得反馈。</p>
+      </li>
+      <li>
+        <p>明确成员责任范围</p>
+
+        <p>明确成员责任范围，确定由谁来改造，确保改造的目标清晰。</p>
+
+        <p>实际上，对于产品而言，遗留系统的维护和更新，包括缺陷定位、缺陷修复、数据更新、功能实现、测试、交付给运维团队等，通常已经让团队的工作处于高负荷状态。因此，需要确定成员，全身心的投入，以微服务改造作为短期目标。</p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>功能剥离</p>
+
+    <p>有了明确的业务范围，成员也有了清晰的责任，接下来就需要将部分功能点进行剥离。</p>
+
+    <p>所谓剥离，就是将选中的功能从原有的系统中拆分出来，并构建成独立的服务。在这个阶段，主要包括两点：</p>
+
+    <ol>
+      <li>
+        <p>将功能从原有系统拆分出来，并构建新服务</p>
+
+        <p>一提到拆分，很多朋友会纠结，“系统复杂，如何拆分微服务才好？怎么样的拆分才合理？”。其实，从我个人的观点来看，这时候还不是纠结服务到底怎么划分合理的时候。为什么？</p>
+
+        <ol>
+          <li>
+            <p>好的架构是动态演变和迭代出来的，业务在不断改变，技术和工具也在不会的升级换代，没有完美的架构，只有无限逼近完美的动态平衡，所以先小范围、低成本动起来，在运转中找平衡点。</p>
+          </li>
+          <li>
+            <p>微服务的复杂度在于分布式系统本身，以及其生态系统（开发、测试、部署、运维、监控、告警）的搭建。</p>
+          </li>
+          <li>
+            <p>团队文化的形成是一个相对漫长的过程，如果花很大力气关注服务怎么拆，而没有聚焦在生态系统的搭建以及团队文化的形成上，实际上是舍本逐末。即便拆分出了不同的服务，在落地的时候也会遇到诸多问题。所以，找一个功能点先拆，然后搭建持续交付流水线，快速试错，建立好有效的反馈闭环机制，再不断寻找动态平衡，拆分出更细的服务或者将不合理的服务合并。</p>
+          </li>
+        </ol>
+      </li>
+      <li>
+        <p>在原有的系统前端，使用代理机制，并使用遗留系统和新服务组合为用户提供价值</p>
+
+        <p>这一步，目的是使用组合的系统（遗留系统+新的服务）为用户提供价值。</p>
+
+        <p>对于Web系统，通常可以在前端使用直接请求新的服务。也可以在后端使用转发请求，获取新服务提供的数据。</p>
+
+        <p>如下图所示：</p>
+
+        <p><img src="/assets/images/microservice_reform_strategy.jpeg" alt="" /></p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>数据解耦</p>
+
+    <p>在以前的遗留系统构建过程中，通常使用数据库作为集成点，不同功能/系统之间通过数据库完成数据交换。对于某些系统，还大量使用存储过程完成业务逻辑，开发的时候看似效率高，但几年下来，DBA成了IT团队最懂业务的人，维护成为瓶颈。</p>
+
+    <p>而实际上，业务的数据是业务固有的组成部分，应当随着业务的变化而变化。业务拆分出来，数据也应该拆分出来。从而保证访问数据只能通过统一的相关业务API完成。便于在将来的业务和架构演进中，有效的对数据维护、管理和升级。</p>
+  </li>
+  <li>
+    <p>数据同步</p>
+
+    <p>数据同步，是一个价值体现的过渡过程。</p>
+
+    <p>一方面，遗留系统的改造中存在的各种各样的挑战和我们今天认为的不合理（当时的场景也许是合理的）。另一方面，对于大部分遗留的系统，都会使用数据库作为集成点（开发成本低），导致某业务功能的数据与其他功能有着千丝万缕的联系，数据的变化容易对其他功能造成影响。</p>
+
+    <p>因此对于大型的遗留系统，很难在短期的时间内（3~6个月）完成全系统的改造。需要一个相对漫长，循序渐进的过程来完成改造。</p>
+
+    <p>譬如，在电商系统中，商家的后台管理系统中的产品、价格的更新，会发布到面向用户的电商搜索系统中以及其他系统中。如果我们将系统中的产品相关拆分成独立服务，则必须也要拆分数据发布机制，否则的话容易造成数据不一致。但拆分数据发布机制，又需要分析清楚不同数据之间的影响和依赖，需要更大的成本，短期内不易完成。</p>
+
+    <p>这时候，如果将新服务的数据同步回原有的数据库，采用这样一个折中的的过程，既能保障新的服务和数据被独立，又不影响原有的遗留系统功能。</p>
+
+    <p>说白了，这其实也是在保证系统为用户提供的业务价值不被破坏。</p>
+
+    <p>有了之前的尝试，接下来就是通过不断的迭代，完成功能剥离，数据解耦、数据同步，从而将更多的功能拆分成独立的服务。</p>
+  </li>
+</ol>
+
+<p><img src="/assets/images/legacy_system_reform_strategy.jpeg" alt="" /></p>
+
+<p>如上就是我对于遗留系统改造的策略。</p>
+
+<h2 id="遗留系统改造实践">遗留系统改造实践</h2>
+<p>接下来，我和大家分享一个我所经历的遗留系统改造的案例。首先，让我们看看这个系统的背景和一些数据。</p>
+
+<h3 id="客户背景">客户背景</h3>
+
+<p><a href="http://movit-tech.com/">盟拓软件</a>是中国房地产行业IT服务及行业解决方案和产品的领先厂家，其依据市场变化推出全民卖房的新营销模式，正从线下的传统现场售楼模式向线上的房地产电商模式进行转变。</p>
+
+<h3 id="业务痛点">业务痛点</h3>
+
+<p>当今房地产行业呈现短期开盘峰值、后期零星散客的业务特性。其面临着高昂线下运营成本，营销成本占销售额&gt;5%。而由此引入的线上竞价秒杀营销模式，传统IT解决方案的系统资源率、峰值扩容能力将无法满足。</p>
+
+<p><img src="/assets/images/case_mengtuo_traditional_mode.png" alt="" /></p>
+
+<h3 id="系统概览">系统概览</h3>
+
+<p>系统为典型的三层单块架构，使用MySQL数据库存储数据。运行在服务器上的应用处理性能较低，为了应对短暂的访问高峰，额外购置了较多的服务器资源，访问高峰过后，服务器资源闲置造成较大浪费，且需要较多人员维护。</p>
+
+<h3 id="相关数据">相关数据</h3>
+
+<ul>
+  <li>
+    <p>代码约<strong>100万</strong>行，测试覆盖率为<strong>10%</strong>，集成测试时间为<strong>一个月</strong></p>
+
+    <p>代码臃肿，无效遗留代码较多，且业务间紧耦合，测试覆盖率较低，测试出问题了难以定位，导致测试耗时较长。</p>
+  </li>
+  <li>
+    <p>营销预案需<strong>提前1个月</strong>准备资源</p>
+
+    <p>为应对访问高峰，每次都需要预购大量的服务资源，重新部署环境，并运行相关测试。</p>
+  </li>
+  <li>
+    <p>业务耦合紧，新业务上线<strong>&gt;半年</strong></p>
+
+    <p>每次测试都要多个业务团队联合测试，问题定位较耗时，测试效率低。</p>
+  </li>
+  <li>
+    <p>上百种业务，2-3种开发语言</p>
+
+    <p>业务复杂，且语言不一，系统联调时耗时较多且需相互配合，时间周期较长。</p>
+  </li>
+  <li>
+    <p>运维团队<strong>&gt;20人</strong></p>
+
+    <p>臃肿的团队导致问题定位需多方配合，沟通成本高。</p>
+  </li>
+</ul>
+
+<p><strong>基于之前定义的改造策略，我们的改造过程大致如下所示：</strong></p>
+
+<p>范围定义：</p>
+
+<ul>
+  <li>
+    <p>将原房地产CRM平台按业务类别拆分为多个微服务。</p>
+
+    <p><img src="/assets/images/case_mengtuo_reform_before_and_after.png" alt="" /></p>
+  </li>
+</ul>
+
+<p>功能剥离：</p>
+
+<ul>
+  <li>从单体CRM系统中逐步拆分出业务模块（服务网关、客户服务、房源服务、机会服务、积分服务）。</li>
+</ul>
+
+<p>数据解耦</p>
+
+<ul>
+  <li>每个微服务的数据进行独立存储。</li>
+</ul>
+
+<p>数据同步</p>
+
+<ul>
+  <li>在负载较低时，将数据同步回原有的遗留系统中不断迭代，陆续完成后续的服务。</li>
+</ul>
+
+<p>改造过程中，基于ServiceComb，<strong>通过控制请求路由，逐步架空对原单体应用的请求， 平滑过渡系统到微服务架构。</strong></p>
+
+<p><strong>单个服务的构建并没有那么复杂，基于ServiceComb，通过如下的简单4步，即可快速完成改造：</strong></p>
+
+<ol>
+  <li>引入<a href="https://github.com/apache/incubator-servicecomb-java-chassis">ServiceComb Java Chassis</a>框架依赖</li>
+  <li>定义服务接口端点</li>
+  <li>添加服务配置文件</li>
+  <li>注释服务启动入口</li>
+</ol>
+
+<p>另外，通过Company Workshop中提供的Docker插件配置，10分钟内完成了服务容器化，自动生成镜像。</p>
+
+<p>同时，利用ServiceComb开发的微服务应用，可同时无缝接入<a href="https://www.huaweicloud.com/product/servicestage.html">ServiceStage</a>，享受到微服务治理、容器虚机混编、应用拓扑等能力。</p>
+
+<p>为应对短暂的业务高峰，经常需要预购大量的资源来提前部署和验证环境，花费大量的人力物力，且资源利用率极低。因此，进行云化改造后的产品和解决方案需要具备随着参与人数增加而秒级伸缩，支撑业务峰值和资源利用率的能力。盟拓软件基于华为ServiceStage的核心技术容器改造、混编方案、编排调度算法等进行容器虚机混编应用云化改造，实现了应用的秒级部署和弹性伸缩能力，极大地提高了资源的利用率。</p>
+
+<p><strong>改造后效果：</strong></p>
+
+<ul>
+  <li>运维人力<strong>减少80%</strong></li>
+  <li>资源利用率<strong>提升50%</strong>，大幅降低运营成本</li>
+  <li><strong>每秒万级</strong>调用链分析能力</li>
+  <li>传统系统和应用平滑改造上云</li>
+  <li>互联网营销模式，天粒度业务快速创新</li>
+</ul>
+
+<p><img src="/assets/images/case_mengtuo_new_mode.png" alt="" /></p>
+
+<p><strong>理论上，经过不断地迭代，逐渐完成业务功能解耦，新服务构建。那么遗留系统就会被替换掉。</strong></p>
+
+<h2 id="改造要点">改造要点</h2>
+<p>在改造的整个过程中，我认为如下几个实践是非常重要的：</p>
+
+<p><img src="/assets/images/best_practices_for_legacy_system_reform.jpeg" alt="" /></p>
+
+<h3 id="基础设施自动化">基础设施自动化</h3>
+<p>原有的部署发生在数据中心，因此流程上相对复杂，而且存在一定弊端（譬如审批和协作上，起不到实质作用）。对于改造后的服务而言，我们使用更多的自动化方式代替复杂的审批流程。通过使用华为ServiceStage作为基础设施，团队能够更自主的对基础设施进行管理。如资源创建、销毁、更新等。随着服务的增多，基础设施自动化帮助我们节省了大量的时间。当然，从组织层面，也成立了专门的小组研究华为ServiceStage以及相关的DevOps配套工具。</p>
+
+<p>目前，国内外有很多优秀的云平台，可以方便的为用户提供基础设施的自动化机制。</p>
+
+<h3 id="微服务生态系统">微服务生态系统</h3>
+<p>微服务的生态系统是指微服务实施过程相关的协作部分，涉及部分较多，譬如测试机制、持续集成、自动化部署、细粒度监控、日志聚合、告警、持续交付，以及大家非常关注的服务注册、服务发现机制等。</p>
+
+<p>这部分的灵活性比较大，因为目前如上说的每一个领域都有很多优秀的工具。譬如日志聚合目前业界的方案通常为ELK，监控的方案如Zabbix、NewRelic、CloudWatch等，成熟的监控工具都具有告警功能，PagerDuty也提供更专业的告警服务。服务注册和发现有ServiceComb框架的Service Center，Eureka，Consul，Zookeeper。大家可以在各自的团队中自由发挥。</p>
+
+<h3 id="开发框架的演进">开发框架的演进</h3>
+<p>开发框架是团队在构建微服务的过程中，不断总结，梳理出的快速开发微服务的相关工具和框架。</p>
+
+<p>我们基于ServiceComb构建了快速开发框架，主要包括四部分，如下图所示：</p>
+
+<p><img src="/assets/images/rapid_development_framework.png" alt="" /></p>
+
+<ol>
+  <li>
+    <p>微服务工程示例</p>
+
+    <p>提供微服务改造架构最佳实践参考工程Company，使能微服务改造或开发能复用其架构设计和配置，同时指导实现服务容器化和后续服务性能测试等提高服务可靠性。</p>
+  </li>
+  <li>
+    <p>契约生成工具</p>
+
+    <p>ServiceComb采用了基于OpenAPI的服务契约，使业务逻辑与编程语言解耦，并可使用Swagger工具定义服务契约，自动生成契约对应的代码和文档。</p>
+  </li>
+  <li>
+    <p>持续集成</p>
+
+    <p>持续集成使用了Jenkins，通过其配置文件定义主要的阶段：</p>
+
+    <blockquote>
+      <p>验证：运行单元测试，集成测试</p>
+
+      <p>构建：构建可执行的jar部署包</p>
+
+      <p>部署：基于指定版本制作镜像，并推送到测试或生产环境下</p>
+    </blockquote>
+
+    <p>利用这样的持续集成模板工程，花费很少的时间，就可以针对新建的微服务应用，快速配置其对应的持续集成环境。</p>
+  </li>
+  <li>
+    <p>Kubernetes集群一键部署</p>
+
+    <p>Kubernetes是谷歌开源的一个容器集群管理工具。基于Kubernetes，可实现微服务的快速部署及弹性伸缩。我们提供了一键部署脚本，部署时只需稍作修改即可通过一条命令，自动完成资源的创建、部署、弹性伸缩、金丝雀发布等。</p>
+  </li>
+</ol>
+
+<h3 id="团队运维自管理">团队运维自管理</h3>
+
+<p>这一部分是关于团队的文化管理。也是对DevOPS的延伸，我们称为TMI（Team Managed Infrastructure）。</p>
+
+<p>目的是将分析、开发、测试以及资源创建、销毁、自动化部署的权利交给团队，由团队按需完成部署（加上看板的流程管理，而非Scrum的固定迭代，可以做到一天部署多次）。</p>
+
+<p>当然，这个环节非常依赖于成熟的监控以及告警机制，当出现问题时，能够有效的通知到责任人，快速反馈，快速修复。团队内部也会定期轮换Pager（出问题救火的人），培养团队以服务可用作为大家的共同目标，培养产品观念，而非项目观念。</p>
+
+<p>再回顾一下这个图：</p>
+
+<p><img src="/assets/images/best_practices_for_legacy_system_reform.jpeg" alt="" /></p>
+
+<p>最后，和大家分享一下，我个人在微服务实施过程中总结的4句方针:</p>
+
+<p><strong>由大到小，由粗到细</strong></p>
+
+<p><strong>关注运维，关注监控</strong></p>
+
+<p><strong>快速反馈，快速修复</strong></p>
+
+<p><strong>循序渐进，增量实现</strong></p>
+
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+    <meta itemprop="headline" content="老司机带你刷任务 - ServiceComb JIRA入门指南">
+    <meta itemprop="description" content="ServiceComb JIRA入门指南">
+    <meta itemprop="datePublished" content="November 16, 2017">
+    <meta itemprop="dateModified" content="November 16, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">老司机带你刷任务 - ServiceComb JIRA入门指南
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>想参与社区贡献，却感觉老虎咬天，无从下口？不用担心，老司机带你一起刷新手任务！</p>
+
+<p>ServiceComb的所有任务托管在<a href="https://servicecomb.atlassian.net">ServiceComb JIRA</a>上，
+首先你需要<a href="https://id.atlassian.com/signup?continue=https%3A%2F%2Fservicecomb.atlassian.net%2Flogin%3FredirectCount%3D1">注册</a>一个免费JIRA账户。</p>
+
+<p><img src="/assets/images/jira/jira.signup.png" alt="jira sign up" class="align-center" /></p>
+
+<p>登陆后请首先花几分钟上传自己的个性头像，让大家可以一眼看出哪些任务在你的掌控之下。</p>
+
+<p><img src="/assets/images/jira/jira.board.profile.png" alt="jira profile" class="align-center" /></p>
+
+<p>接下来在菜单栏点击Boards，选择ServiceComb转到如下Kanban board。</p>
+
+<p><img src="/assets/images/jira/jira.board.selection.png" alt="jira board selection" class="align-center" /></p>
+
+<p>ServiceComb Kanban board页面分为三列：</p>
+<ul>
+  <li>To Do：还未开始的任务</li>
+  <li>In Progress：进行中的任务</li>
+  <li>Done：已完成的任务</li>
+</ul>
+
+<p><img src="/assets/images/jira/jira.board.png" alt="jira board" class="align-center" /></p>
+
+<p>To Do列的任务卡上如果没有头像，代表这个任务无人领取，但作为新手，我怎么知道哪个任务容易上手呢？
+我们很细心的为新手任务加上了绿色竖线标记，这个标记对应所有打了 <code class="highlighter-rouge">good-first-issue</code> 标签的任务，
+以便大家一眼识别，立即上手。</p>
+
+<p><img src="/assets/images/jira/jira.good.first.issue.png" alt="jira good first issue" class="align-center" /></p>
+
+<p><img src="/assets/images/jira/jira.story.png" alt="jira story" class="align-center" /></p>
+
+<p>另外，任务还按照功能模块划分了epic，这样大家可以在自己擅长的领域大显身手，或者在全新的模块挑战自己。</p>
+
+<p><img src="/assets/images/jira/jira.epic.png" alt="jira epic" class="align-center" /></p>
+
+<p>选到心仪的任务后，记得讲任务分配给自己，以免被别人抢走。</p>
+
+<p><img src="/assets/images/jira/jira.story.assignment.png" alt="jira story assignment" class="align-center" /></p>
+
+<p>另外别忘了根据自己的进度，更新对应任务的状态，你可以直接拖动任务卡到对应状态列。</p>
+
+<p><img src="/assets/images/jira/jira.status.update.png" alt="jira status update" class="align-center" /></p>
+
+<p>最后，在完成任务后，咨询项目带队老司机，将自己的贡献添加到对应的发布版本中。</p>
+
+<p><img src="/assets/images/jira/jira.fix.version.png" alt="jira fix.version" class="align-center" /></p>
+
+<p>看到现在相信你已经跃跃欲试，赶紧加入我们一起刷任务升级吧！</p>
+
+        
+      </section>
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@@ -0,0 +1,905 @@
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+                
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+    <h3 class="author__name" itemprop="name">Li Bo</h3>
+    
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+	    
+	      
+	        It works, but it hasn’t been tested.
+	      
+	    
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+            <meta itemprop="email" content="libo75@huawei.com" />
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+      
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+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="如何加入ServiceComb社区">
+    <meta itemprop="description" content="如何加入ServiceComb社区">
+    <meta itemprop="datePublished" content="April 04, 2018">
+    <meta itemprop="dateModified" content="September 16, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">如何加入ServiceComb社区
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>近期，热衷开源和微服务的伙伴们非常关注如何加入到ServiceComb社区。ServiceComb作为开源的Apache 孵化项目，加入方式和常规的加入开源社区的方式大体一致，一般为三个阶段：1. 订阅并关注社区动态；2. 开始在开源社区提交第一份代码；3. 深度加入社区讨论并贡献，以下将详细向大家讲述如何一步步加入ServiceComb社区。</p>
+
+<h3 id="step-1-订阅并关注servicecomb社区动态">Step 1 订阅并关注ServiceComb社区动态</h3>
+
+<p>订阅和关注社区动态的途径有：即时通讯工具（社区微信群、gitter）、社区公众号、开发者邮件列表、门户网站。</p>
+
+<p><strong>即时通讯工具</strong></p>
+
+<p>扫描下方二维码或搜索<code class="highlighter-rouge">ServiceComb小助手</code>加入微信群，加入后可以在微信群中咨询和求助，会有热心的伙伴和committer 及时的响应回复。</p>
+
+<p><img src="/assets/images/jira/assist.png" alt="" class="align-center" /></p>
+
+<p>也可使用Github账号登录gitter（地址 https://gitter.im/ServiceCombUsers/Lobby）进行在线讨论，国内的伙伴们更习惯于使用微信群进行在线交流，但为了更方便后来加入的人可以检索并查阅前期的讨论内容存档，所以ServiceComb社区推荐使用gitter。</p>
+
+<p><strong>社区公众号</strong></p>
+
+<p>扫描下方二维码关注公众号或微信公众号中搜索<code class="highlighter-rouge">ServiceComb</code>进行关注，公众号会定期的发布和推送ServiceComb近期相应资讯（干货资料、学习资源、线上活动、线下活动等）。</p>
+
+<p><img src="/assets/images/jira/public.png" alt="" class="align-center" /></p>
+
+<p><strong>邮件列表</strong></p>
+
+<p>通过订阅开发者邮件可以及时获取到社区开发者的邮件讨论内容，可发起讨论，也可通过回复感兴趣的讨论题目参与到讨论中（邮件内容均使用英文），另外邮件的存档功能可以方便开发者查阅历史问题的讨论过程。</p>
+
+<p>订阅邮件方式：</p>
+
+<ul>
+  <li>发送任意内容到<code class="highlighter-rouge">dev-subscribe@servicecomb.incubator.apache.org</code></li>
+  <li>收到来自<code class="highlighter-rouge">dev-help@servicecomb.apache.org</code>的确认邮件后，再回复dev-help任意内容来确认订阅邮件列表即可。</li>
+</ul>
+
+<p>邮件存档内容可通过https://www.mail-archive.com/搜索<code class="highlighter-rouge">ServiceComb</code>获取。</p>
+
+<p><strong>门户网站</strong></p>
+
+<p>ServiceComb门户网站是社区的官方入口，包括快速入门指南、用户手册、开发者手册、常见问题和开发博文等。</p>
+
+<p>网站地址: http://servicecomb.incubator.apache.org/cn/</p>
+
+<h3 id="step-2-在-servicecomb-社区提交第一份代码pr">Step 2 在 ServiceComb 社区提交第一份代码（PR）</h3>
+
+<p>当关注社区并尝试调试使用后，会发现一些简单的bug（如文档或代码格式问题等），可以通过fix简单的bug来熟悉ServiceComb社区的开发流程。</p>
+
+<p><strong>发现问题并提交Issue：</strong></p>
+
+<p>由于ServiceComb的任务管理是在Apache JIRA上进行的，所以需要先注册并登录到JIRA。关于JIRA详细使用方法请参考JIRA使用帮助：http://servicecomb.incubator.apache.org/cn/developers/use-jira/</p>
+
+<ul>
+  <li>
+    <p>注册并登陆到 https://issues.apache.org/jira/projects/SCB，点击左侧Kanban可以看到当前待处理、处理中和已经完成的任务列表。</p>
+
+    <p><img src="/assets/images/jira/jira-kanban.png" alt="kanabn" class="align-center" /></p>
+  </li>
+  <li>
+    <p>点击<strong>新建</strong>创建新的issue或者task进行问题或任务跟踪，选择相应的模块并添加描述信息。</p>
+
+    <p><img src="/assets/images/jira/create-issue.png" alt="create" class="align-center" /></p>
+  </li>
+</ul>
+
+<p>任务提交到JIRA后，需要在本地进行代码开发，进行第一份代码的提交。</p>
+
+<p><strong>提交第一份代码（PR）</strong></p>
+
+<p>开发者在GitHub上fork仓库后clone到本地进行代码修改，修改完成并测试通过后可以创建PR提交代码，提交PR后系统会自动运行CI进行代码测试。测试通过后会有其他开发者或者maintainer进行review，没有问题后会被approve并merge到主干分支。具体可参考门户网站上开发者手册中的代码提交指南：</p>
+
+<p>http://servicecomb.incubator.apache.org/cn/developers/submit-codes/</p>
+
+<p>需要<strong>注意</strong>的是，创建PR的时候，PR的title要以JIRA中对应的问题编号开头，如下图中 [SCB-327]，这样系统就会自动关联本次提交到相应JIRA任务下，方便进度跟踪。</p>
+
+<p><img src="/assets/images/jira/pr.png" alt="" class="align-center" /></p>
+
+<p>刚才提交的代码经过committer的review后，如果有问题committer会进行comment，继续修改后push最新代码即可。如果没有问题会approve并merge。</p>
+
+<p>至此，您已经熟悉了ServiceComb社区的初级的开发流程，也是常规的社区开发方法（不同的社区承载体会有细微差异，如kubernetes的问题跟踪是直接承载github的issue上）。下一步就可以深度参与到ServiceComb的讨论并进行贡献。</p>
+
+<h3 id="step-3-深度参与到servicecomb讨论并贡献">Step 3 深度参与到ServiceComb讨论并贡献</h3>
+
+<p>由于开源社区强调开放性，当开发者想在社区里做一些较大或中长期的特性时，则需在ServiceComb社区发起特性的讨论。</p>
+
+<h4 id="如何发起特性讨论">如何发起特性讨论</h4>
+
+<p>通过邮件发Proposal到社区进行讨论，Proposal中有贴图或附加文档时可先创建好文件链接，将链接贴到邮件里即可，创建文件可以有一下两种方式：</p>
+
+<ul>
+  <li>
+    <p>在JIRA上创建一个对应的特性任务，并将Proposal文档添加到该任务的附件中，拷贝链接。</p>
+  </li>
+  <li>
+    <p>通过github向servicecomb.io网站以blog的形式提交文件，将该blog地址拷贝到邮件中。</p>
+
+    <p>文档附件可参考：</p>
+
+    <p>http://servicecomb.incubator.apache.org/docs/service-registry-refactor-proposal/</p>
+
+    <p>Proposal邮件参考：</p>
+
+    <p><img src="/assets/images/jira/proposal-pack.png" alt="proposal-pack" class="align-center" /></p>
+  </li>
+</ul>
+
+<p>当在邮件中讨论清楚特性设计后，就可以开始对应的代码开发，或对于部分小的任务（如代码bug修复、文档完善、网站优化等），其本身不需要过多讨论，则可参考上一步骤 Step 2 中的开发流程进行代码贡献。</p>
+
+<p>遇到其他本文章未解决的问题（如用户业务准备进行微服务技术选型或ServiceComb的概念性问题等）时，建议直接到微信群或者gitter里进行咨询并寻求帮助。</p>
+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Linux Con Workshop Demo">
+    <meta itemprop="description" content="A step by step guide on how to use ServiceComb to develop a complete project">
+    <meta itemprop="datePublished" content="June 15, 2017">
+    <meta itemprop="dateModified" content="June 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Linux Con Workshop Demo
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>为了读者能更容易了解ServiceComb微服务框架的功能以及如何用其快速开发微服务，所以提供大家耳熟能详的例子，降低学习曲线的同时，增加趣味性，加深理解。</p>
+
+<p>本文中假设我们成立了一家科研公司，处理复杂的数学运算，以及尖端生物科技研究，并为用户提供如下服务：</p>
+
+<ul>
+  <li>
+    <p>黄金分割数列计算</p>
+  </li>
+  <li>
+    <p>蜜蜂繁殖规律 (计算每只雄蜂/雌蜂的祖先数量)</p>
+  </li>
+</ul>
+
+<p>但是我们如何将公司的这些强大运算能力提供给我们的消费者呢？</p>
+
+<p>首先我们通过认证服务保障公司的计算资源没有被滥用， 同时我们对外提供Rest服务让用户来进行访问。 下面的视频展示具体的服务验证调用的情况。</p>
+
+<!-- Courtesy of embedresponsively.com //-->
+<div class="responsive-video-container">
+
+  <iframe src="https://player.youku.com/embed/XMjg1NzQ3NzUzNg" frameborder="0" allowfullscreen=""></iframe>
+
+</div>
+
+<aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#业务场景" id="markdown-toc-业务场景">业务场景</a></li>
+  <li><a href="#公司结构-系统架构" id="markdown-toc-公司结构-系统架构">公司结构 (系统架构)</a></li>
+  <li><a href="#技工-worker" id="markdown-toc-技工-worker">技工 (Worker)</a>    <ul>
+      <li><a href="#黄金分割运算服务" id="markdown-toc-黄金分割运算服务">黄金分割运算服务</a></li>
+      <li><a href="#技工服务端点" id="markdown-toc-技工服务端点">技工服务端点</a></li>
+    </ul>
+  </li>
+  <li><a href="#告示栏-bulletin-board" id="markdown-toc-告示栏-bulletin-board">告示栏 (Bulletin Board)</a></li>
+  <li><a href="#养蜂人-beekeeper" id="markdown-toc-养蜂人-beekeeper">养蜂人 (Beekeeper)</a>    <ul>
+      <li><a href="#蜜蜂繁殖规律研究服务" id="markdown-toc-蜜蜂繁殖规律研究服务">蜜蜂繁殖规律研究服务</a></li>
+      <li><a href="#养蜂人服务端点" id="markdown-toc-养蜂人服务端点">养蜂人服务端点</a></li>
+    </ul>
+  </li>
+  <li><a href="#门卫-doorman" id="markdown-toc-门卫-doorman">门卫 (Doorman)</a>    <ul>
+      <li><a href="#门卫认证服务" id="markdown-toc-门卫认证服务">门卫认证服务</a></li>
+      <li><a href="#门卫认证服务端点" id="markdown-toc-门卫认证服务端点">门卫认证服务端点</a></li>
+    </ul>
+  </li>
+  <li><a href="#经理-manager" id="markdown-toc-经理-manager">经理 (Manager)</a>    <ul>
+      <li><a href="#用户认证服务" id="markdown-toc-用户认证服务">用户认证服务</a></li>
+      <li><a href="#请求过滤" id="markdown-toc-请求过滤">请求过滤</a></li>
+    </ul>
+  </li>
+  <li><a href="#项目归档-project-archive" id="markdown-toc-项目归档-project-archive">项目归档 (Project Archive)</a></li>
+  <li><a href="#人力资源-human-resource" id="markdown-toc-人力资源-human-resource">人力资源 (Human Resource)</a></li>
+  <li><a href="#总结" id="markdown-toc-总结">总结</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="业务场景">业务场景</h2>
+<p>让我们先对业务场景进行总结分析</p>
+
+<ol>
+  <li>
+    <p>为了公司持续发展，我们需要对用户消费的运算能力收费，所以我们聘用了<strong>门卫</strong>认证用户，避免不法分子混入</p>
+  </li>
+  <li>
+    <p>为了提供足够的黄金分割数量运算能力，我们需要雇佣相应的<strong>技工</strong></p>
+  </li>
+  <li>
+    <p>为了持续研究蜜蜂繁殖规律，公司建立了自己的蜂场，需要相应的<strong>养蜂人</strong>进行管理研究</p>
+  </li>
+  <li>
+    <p>为了平衡<strong>技工</strong>、<strong>养蜂人</strong>、和<strong>门卫</strong>的工作量和时间，我们建立了<strong>告示栏</strong>机制，让当前有闲暇的人员发布自己的联系方式，以便我们能及时联系技能匹配的人员以服务到来的用户</p>
+  </li>
+  <li>
+    <p>因为运算能力成本高昂，我们将运算项目进行了<strong>归档</strong>，以便未来有相同请求时，我们能直接查询<strong>项目归档</strong>，节省公司运算成本</p>
+  </li>
+  <li>
+    <p>面对上述复杂的场景，我们又聘用了<strong>部门经理</strong>来管理公司成员和设施</p>
+  </li>
+  <li>
+    <p>最后，当公司日益壮大，用户数量暴涨时，我们还需要招聘更多<strong>技工</strong>、<strong>养蜂人</strong>、和<strong>门卫</strong>，所以增加了<strong>人力资源</strong>部门</p>
+  </li>
+</ol>
+
+<h2 id="公司结构-系统架构">公司结构 (系统架构)</h2>
+<p>到现在业务场景已经比较清晰，我们把上述职务部门和设施画成公司组织结构图。
+<img src="/assets/images/workshop-company-structure.png" alt="company structure" class="align-center" /></p>
+
+<p>现在公司组织结构已经完整，让我们着手搭建相应部门。</p>
+
+<h2 id="技工-worker">技工 (Worker)</h2>
+<p>因为技工最为简单，对其他部门人员依赖最少，我们首先搭建这个部门。</p>
+
+<h3 id="黄金分割运算服务">黄金分割运算服务</h3>
+<p>技工的主要工作时提供黄金分割数列计算服务，当用户需要知道第n个黄金分割数时，技工以最快的速度计算出数值并返回给用户。
+我们可以把这个工作简化为如下数学方程:</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>value = fibo(n)
+</code></pre></div></div>
+
+<p>在暂时不考虑性能的情况下，我们可以迅速实现黄金分割数列的计算。</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">interface</span> <span class="nc">FibonacciService</span> <span class="o">{</span>
+  <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="nd">@Service</span>
+<span class="kd">class</span> <span class="nc">FibonacciServiceImpl</span> <span class="kd">implements</span> <span class="nc">FibonacciService</span> <span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">n</span> <span class="o">==</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+    <span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(</span><span class="n">n</span> <span class="o">==</span> <span class="mi">1</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">1</span><span class="o">;</span>
+    <span class="o">}</span>
+
+    <span class="k">return</span> <span class="nf">term</span><span class="o">(</span><span class="n">n</span> <span class="o">-</span> <span class="mi">1</span><span class="o">)</span> <span class="o">+</span> <span class="n">term</span><span class="o">(</span><span class="n">n</span> <span class="o">-</span> <span class="mi">2</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="技工服务端点">技工服务端点</h3>
+<p>黄金分割数量运算已经实现，现在我们需要将服务提供给用户，首先我们定义端点接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">FibonacciEndpoint</span> <span class="o">{</span>
+  <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>引入 <code class="highlighter-rouge">ServiceComb</code> 依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+
+</code></pre></div></div>
+
+<p>接下来我们同时暴露黄金分割运算服务的<strong>Restful</strong>和<strong>RPC</strong>端点：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"fibonacciRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/fibonacci"</span><span class="o">)</span>
+<span class="nd">@Controller</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">FibonacciRestEndpoint</span> <span class="kd">implements</span> <span class="nc">FibonacciEndpoint</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">FibonacciRestEndpoint</span><span class="o">(</span><span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">fibonacciService</span> <span class="o">=</span> <span class="n">fibonacciService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/term"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">fibonacciService</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">n</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RpcSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"fibonacciRpcEndpoint"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">FibonacciRpcEndpoint</span> <span class="kd">implements</span> <span class="nc">FibonacciEndpoint</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="kd">public</span> <span class="nf">FibonacciRpcEndpoint</span><span class="o">(</span><span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">fibonacciService</span> <span class="o">=</span> <span class="n">fibonacciService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">fibonacciService</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">n</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>这里用 <code class="highlighter-rouge">@RestSchema</code> 和 <code class="highlighter-rouge">@RpcSchema</code> 注释两个端点后，<code class="highlighter-rouge">ServiceComb</code> 会自动生成对应的服务端点契约，根据如下
+<code class="highlighter-rouge">microsevice.yaml</code> 配置端点端口，并将契约和服务一起注册到<a href="https://github.com/apache/incubator-servicecomb-service-center">Service Center</a>：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># all interconnected microservices must belong to an application wth the same ID</span>
+<span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+<span class="c1"># name of the declaring microservice</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">worker</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="c1"># service center address</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+
+<p>最后，提供技工服务应用启动入口，并加上 <code class="highlighter-rouge">@EnableServiceComb</code> 注释启用 <code class="highlighter-rouge">ServiceComb</code> ：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">WorkerApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">WorkerApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="告示栏-bulletin-board">告示栏 (Bulletin Board)</h2>
+<p><strong>告示栏</strong>提供为<strong>门卫</strong>、<strong>技工</strong>和<strong>养蜂人</strong>注册联系方式的设施，同时<strong>经理</strong>和<strong>养蜂人</strong>可通过此设施查询注册方的联系方式，以方便匹配能力的提供和消费。</p>
+
+<p><code class="highlighter-rouge">Service Center</code> 提供契约和服务注册、发现功能，而且校验服务提供方和消费方的契约是否匹配，我们可以<a href="https://github.com/apache/incubator-servicecomb-service-center/releases">下载</a>编译好的版本直接运行。</p>
+
+<h2 id="养蜂人-beekeeper">养蜂人 (Beekeeper)</h2>
+<p><strong>养蜂人</strong>研究蜜蜂繁殖规律，计算每只蜜蜂 (雄蜂/雌蜂) 的祖先数量。因为蜜蜂繁殖规律和黄金分割数列相关，所以<strong>养蜂人</strong>同时消费<strong>技工</strong>提供的计算服务。</p>
+
+<p><a href="http://www.dave-cushman.net/bee/fibonacci.html">研究</a>表明，雄蜂(Drone)由未受精卵孵化而生，只有母亲；而雌蜂(Queen)由受精卵孵化而生，既有母又有父。</p>
+
+<p class="figure-caption"><img src="/assets/images/fibonaccitree.gif" alt="fibonacci tree" />
+Credit: <a href="http://www.dave-cushman.net&quot;">Dave Cushman’s website</a></p>
+
+<p>参考上图，蜜蜂的某一代祖先数量符合黄金分割数列的模型，由此我们可以很快实现服务功能。</p>
+
+<h3 id="蜜蜂繁殖规律研究服务">蜜蜂繁殖规律研究服务</h3>
+<p>首先我们定义黄金数列运算接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">FibonacciCalculator</span> <span class="o">{</span>
+
+  <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>接下来定义并实现蜜蜂繁殖规律研究服务:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">interface</span> <span class="nc">BeekeeperService</span> <span class="o">{</span>
+  <span class="kt">long</span> <span class="nf">ancestorsOfDroneAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">);</span>
+
+  <span class="kt">long</span> <span class="nf">ancestorsOfQueenAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="kd">class</span> <span class="nc">BeekeeperServiceImpl</span> <span class="kd">implements</span> <span class="nc">BeekeeperService</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">FibonacciCalculator</span> <span class="n">fibonacciCalculator</span><span class="o">;</span>
+
+  <span class="nc">BeekeeperServiceImpl</span><span class="o">(</span><span class="nc">FibonacciCalculator</span> <span class="n">fibonacciCalculator</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">fibonacciCalculator</span> <span class="o">=</span> <span class="n">fibonacciCalculator</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">ancestorsOfDroneAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">generation</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="n">fibonacciCalculator</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">generation</span> <span class="o">+</span> <span class="mi">1</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">ancestorsOfQueenAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">generation</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="n">fibonacciCalculator</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">generation</span> <span class="o">+</span> <span class="mi">2</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>这里我们用到之前定义的 <code class="highlighter-rouge">FibonacciCalculator</code> 接口，并希望通过这个接口远程调用<strong>技工</strong>服务端点。<code class="highlighter-rouge">@RpcReference</code>
+注释能帮助我们自动从<a href="https://github.com/apache/incubator-servicecomb-service-center">Service Center</a>中获取
+<code class="highlighter-rouge">microserviceName = "worker", schemaId = "fibonacciRpcEndpoint"</code> ， 即服务名为 <code class="highlighter-rouge">worker</code> 已经schema ID为
+<code class="highlighter-rouge">fibonacciRpcEndpoint</code>的端点：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Configuration</span>
+<span class="kd">class</span> <span class="nc">BeekeeperConfig</span> <span class="o">{</span>
+
+  <span class="nd">@RpcReference</span><span class="o">(</span><span class="n">microserviceName</span> <span class="o">=</span> <span class="s">"worker"</span><span class="o">,</span> <span class="n">schemaId</span> <span class="o">=</span> <span class="s">"fibonacciRpcEndpoint"</span><span class="o">)</span>
+  <span class="kd">private</span> <span class="nc">FibonacciCalculator</span> <span class="n">fibonacciCalculator</span><span class="o">;</span>
+
+  <span class="nd">@Bean</span>
+  <span class="nc">BeekeeperService</span> <span class="nf">beekeeperService</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">BeekeeperServiceImpl</span><span class="o">(</span><span class="n">fibonacciCalculator</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>我们在<strong>技工</strong>一节已定义好对应的服务名和schema ID端点，通过上面的配置，<code class="highlighter-rouge">ServiceComb</code> 会自动将远程<strong>技工</strong>服务
+实例和 <code class="highlighter-rouge">FibonacciCalculator</code> 绑定在一起。</p>
+
+<h3 id="养蜂人服务端点">养蜂人服务端点</h3>
+<p>与上一节<strong>技工</strong>服务相似，我们在这里也需要提供养蜂人服务端点，让用户可以进行调用：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"beekeeperRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/rest"</span><span class="o">)</span>
+<span class="nd">@Controller</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">BeekeeperController</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">BeekeeperController</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">BeekeeperService</span> <span class="n">beekeeperService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">BeekeeperController</span><span class="o">(</span><span class="nc">BeekeeperService</span> <span class="n">beekeeperService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">beekeeperService</span> <span class="o">=</span> <span class="n">beekeeperService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/drone/ancestors/{generation}"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">GET</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">APPLICATION_JSON_UTF8_VALUE</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="nc">Ancestor</span> <span class="nf">ancestorsOfDrone</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span>
+        <span class="s">"Received request to find the number of ancestors of drone at generation {}"</span><span class="o">,</span>
+        <span class="n">generation</span><span class="o">);</span>
+
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">Ancestor</span><span class="o">(</span><span class="n">beekeeperService</span><span class="o">.</span><span class="na">ancestorsOfDroneAt</span><span class="o">(</span><span class="n">generation</span><span class="o">));</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/queen/ancestors/{generation}"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">GET</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">APPLICATION_JSON_UTF8_VALUE</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="nc">Ancestor</span> <span class="nf">ancestorsOfQueen</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span>
+        <span class="s">"Received request to find the number of ancestors of queen at generation {}"</span><span class="o">,</span>
+        <span class="n">generation</span><span class="o">);</span>
+
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">Ancestor</span><span class="o">(</span><span class="n">beekeeperService</span><span class="o">.</span><span class="na">ancestorsOfQueenAt</span><span class="o">(</span><span class="n">generation</span><span class="o">));</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+
+<span class="kd">class</span> <span class="nc">Ancestor</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kt">long</span> <span class="n">ancestors</span><span class="o">;</span>
+
+  <span class="nc">Ancestor</span><span class="o">()</span> <span class="o">{</span>
+  <span class="o">}</span>
+
+  <span class="nc">Ancestor</span><span class="o">(</span><span class="kt">long</span> <span class="n">ancestors</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">ancestors</span> <span class="o">=</span> <span class="n">ancestors</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">getAncestors</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">ancestors</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>因为<strong>养蜂人</strong>需要消费<strong>技工</strong>提供的服务，所以其 <code class="highlighter-rouge">microservice.yaml</code> 配置稍有不同：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># all interconnected microservices must belong to an application wth the same ID</span>
+<span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+<span class="c1"># name of the declaring microservice</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">beekeeper</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8090</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-consumer,loadbalance</span>
+  <span class="na">references</span><span class="pi">:</span>
+<span class="c1">#  this one below must refer to the microservice name it communicates with</span>
+    <span class="na">worker</span><span class="pi">:</span>
+      <span class="na">version-rule</span><span class="pi">:</span> <span class="s">0.0.1</span>
+</code></pre></div></div>
+
+<p>这里我们需要定义 <code class="highlighter-rouge">servicecomb.references.worker.version-rule</code> ，让配置名称中指向<strong>技工</strong>服务名 <code class="highlighter-rouge">worker</code> ，并匹配其版本号。</p>
+
+<p>最后定义养蜂人服务应用入口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">BeekeeperApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">BeekeeperApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="门卫-doorman">门卫 (Doorman)</h2>
+<p><strong>门卫</strong>为公司提供安全保障，屏蔽非合法用户，防止其骗取免费服务，甚至伤害<strong>技工</strong>和<strong>养蜂人</strong>。</p>
+
+<h3 id="门卫认证服务">门卫认证服务</h3>
+<p>认证功能我们采用<a href="https://jwt.io/introduction/">JSON Web Token (JWT)</a>的机制，具体实现超出了这篇文章的范围，
+细节大家可以查看github上<a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">workshop</a>的 <code class="highlighter-rouge">doorman</code> 模块代码。</p>
+
+<p>认证服务的接口如下，<code class="highlighter-rouge">authenticate</code> 方法根据用户名和密码查询确认用户存在，并返回对应JWT token。用户登录后的每次
+请求都需要带上返回的JWT token，而 <code class="highlighter-rouge">validate</code> 方法将验证token以确认其有效。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">AuthenticationService</span> <span class="o">{</span>
+  <span class="nc">String</span> <span class="nf">authenticate</span><span class="o">(</span><span class="nc">String</span> <span class="n">username</span><span class="o">,</span> <span class="nc">String</span> <span class="n">password</span><span class="o">);</span>
+
+  <span class="nc">String</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="门卫认证服务端点">门卫认证服务端点</h3>
+
+<p>与前两节的Rest服务端点相似，我们加上 <code class="highlighter-rouge">@RestSchema</code> 注释，以便 <code class="highlighter-rouge">ServiceComb</code> 自动配置端点、生成契约并注册服务。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"authenticationRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@Controller</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/rest"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">AuthenticationController</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">AuthenticationController</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">USERNAME</span> <span class="o">=</span> <span class="s">"username"</span><span class="o">;</span>
+  <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">PASSWORD</span> <span class="o">=</span> <span class="s">"password"</span><span class="o">;</span>
+  <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">TOKEN</span> <span class="o">=</span> <span class="s">"token"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">AuthenticationController</span><span class="o">(</span><span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">authenticationService</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/login"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">POST</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">TEXT_PLAIN_VALUE</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="nf">login</span><span class="o">(</span>
+      <span class="nd">@RequestParam</span><span class="o">(</span><span class="no">USERNAME</span><span class="o">)</span> <span class="nc">String</span> <span class="n">username</span><span class="o">,</span>
+      <span class="nd">@RequestParam</span><span class="o">(</span><span class="no">PASSWORD</span><span class="o">)</span> <span class="nc">String</span> <span class="n">password</span><span class="o">)</span> <span class="o">{</span>
+
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received login request from user {}"</span><span class="o">,</span> <span class="n">username</span><span class="o">);</span>
+    <span class="nc">String</span> <span class="n">token</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">.</span><span class="na">authenticate</span><span class="o">(</span><span class="n">username</span><span class="o">,</span> <span class="n">password</span><span class="o">);</span>
+    <span class="nc">HttpHeaders</span> <span class="n">headers</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HttpHeaders</span><span class="o">();</span>
+    <span class="n">headers</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="no">AUTHORIZATION</span><span class="o">,</span> <span class="no">TOKEN_PREFIX</span> <span class="o">+</span> <span class="n">token</span><span class="o">);</span>
+
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Authenticated user {} successfully"</span><span class="o">,</span> <span class="n">username</span><span class="o">);</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="s">"Welcome, "</span> <span class="o">+</span> <span class="n">username</span><span class="o">,</span> <span class="n">headers</span><span class="o">,</span> <span class="no">OK</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/validate"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">POST</span><span class="o">,</span> <span class="n">consumes</span> <span class="o">=</span> <span class="no">APPLICATION_JSON_UTF8_VALUE</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">TEXT_PLAIN_VALUE</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">validate</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Token</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received validation request of token {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="k">return</span> <span class="n">authenticationService</span><span class="o">.</span><span class="na">validate</span><span class="o">(</span><span class="n">token</span><span class="o">.</span><span class="na">getToken</span><span class="o">());</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+
+<span class="kd">class</span> <span class="nc">Token</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="nc">String</span> <span class="n">token</span><span class="o">;</span>
+
+  <span class="nc">Token</span><span class="o">()</span> <span class="o">{</span>
+  <span class="o">}</span>
+
+  <span class="nc">Token</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">token</span> <span class="o">=</span> <span class="n">token</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getToken</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">token</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">toString</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="s">"Token{"</span> <span class="o">+</span>
+        <span class="s">"token='"</span> <span class="o">+</span> <span class="n">token</span> <span class="o">+</span> <span class="sc">'\''</span> <span class="o">+</span>
+        <span class="sc">'}'</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>同样，我们需要提供服务应用启动入口以及 <code class="highlighter-rouge">microservice.yaml</code>：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">DoormanApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">DoormanApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># all interconnected microservices must belong to an application wth the same ID</span>
+<span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+<span class="c1"># name of the declaring microservice</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">doorman</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:9090</span>
+</code></pre></div></div>
+
+<h2 id="经理-manager">经理 (Manager)</h2>
+<p>为了管理所有人员和设施，<strong>经理</strong>作为用户唯一接口人，主要功能有：</p>
+
+<ul>
+  <li>
+    <p>联系<strong>门卫</strong>认证用户，保护<strong>技工</strong>和<strong>养蜂人</strong>，以免非法用户骗取服务并逃避服务费用</p>
+  </li>
+  <li>
+    <p>联系能力相符的<strong>技工</strong>和<strong>养蜂人</strong>，平衡工作量，避免单个人员工作超载</p>
+  </li>
+  <li>
+    <p>管理<strong>项目归档</strong>，避免重复工作，保证公司收益最大化</p>
+  </li>
+</ul>
+
+<p>由于<strong>经理</strong>责任重大，我们选取了业界有名的<a href="https://github.com/Netflix/zuul">Netflix Zuul</a>作为候选人并加以培训，
+提升其能力，以保证其能胜任该职位。</p>
+
+<p>首先我们引入依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="用户认证服务">用户认证服务</h3>
+<p>当用户发送非登录请求时，我们首先需要验证用户合法，在如下服务中，我们通过<strong>告示栏</strong>获取<strong>门卫</strong>联系方式，
+然后发送用户token给<strong>门卫</strong>进行认证。</p>
+
+<p><code class="highlighter-rouge">ServiceComb</code> 提供了相应 <code class="highlighter-rouge">RestTemplate</code> 实现查询<a href="https://github.com/apache/incubator-servicecomb-service-center">Service Center</a>
+中的服务注册信息，只需在地址中以如下格式包含被调用的服务名</p>
+
+<div class="language-html highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cse://doorman/path/to/rest/endpoint
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">ServiceComb</code> 将自动查询对应服务并发送请求到地址中的服务端点。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Service</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">AuthenticationService</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">AuthenticationService</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">DOORMAN_ADDRESS</span> <span class="o">=</span> <span class="s">"cse://doorman"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">RestTemplate</span> <span class="n">restTemplate</span><span class="o">;</span>
+
+  <span class="nc">AuthenticationService</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">restTemplate</span> <span class="o">=</span> <span class="nc">RestTemplateBuilder</span><span class="o">.</span><span class="na">create</span><span class="o">();</span>
+
+    <span class="k">this</span><span class="o">.</span><span class="na">restTemplate</span><span class="o">.</span><span class="na">setErrorHandler</span><span class="o">(</span><span class="k">new</span> <span class="nc">ResponseErrorHandler</span><span class="o">()</span> <span class="o">{</span>
+      <span class="nd">@Override</span>
+      <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">hasError</span><span class="o">(</span><span class="nc">ClientHttpResponse</span> <span class="n">clientHttpResponse</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
+        <span class="k">return</span> <span class="kc">false</span><span class="o">;</span>
+      <span class="o">}</span>
+
+      <span class="nd">@Override</span>
+      <span class="kd">public</span> <span class="kt">void</span> <span class="nf">handleError</span><span class="o">(</span><span class="nc">ClientHttpResponse</span> <span class="n">clientHttpResponse</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
+      <span class="o">}</span>
+    <span class="o">});</span>
+  <span class="o">}</span>
+
+  <span class="nd">@HystrixCommand</span><span class="o">(</span><span class="n">fallbackMethod</span> <span class="o">=</span> <span class="s">"timeout"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Validating token {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="n">responseEntity</span> <span class="o">=</span> <span class="n">restTemplate</span><span class="o">.</span><span class="na">postForEntity</span><span class="o">(</span>
+        <span class="no">DOORMAN_ADDRESS</span> <span class="o">+</span> <span class="s">"/rest/validate"</span><span class="o">,</span>
+        <span class="n">validationRequest</span><span class="o">(</span><span class="n">token</span><span class="o">),</span>
+        <span class="nc">String</span><span class="o">.</span><span class="na">class</span>
+    <span class="o">);</span>
+
+    <span class="k">if</span> <span class="o">(!</span><span class="n">responseEntity</span><span class="o">.</span><span class="na">getStatusCode</span><span class="o">().</span><span class="na">is2xxSuccessful</span><span class="o">())</span> <span class="o">{</span>
+      <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"No such user found with token {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Validated request of token {} to be user {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">,</span> <span class="n">responseEntity</span><span class="o">.</span><span class="na">getBody</span><span class="o">());</span>
+    <span class="k">return</span> <span class="n">responseEntity</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="nf">timeout</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"Request to validate token {} timed out"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="no">REQUEST_TIMEOUT</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">HttpEntity</span><span class="o">&lt;</span><span class="nc">Token</span><span class="o">&gt;</span> <span class="nf">validationRequest</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">HttpHeaders</span> <span class="n">headers</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HttpHeaders</span><span class="o">();</span>
+    <span class="n">headers</span><span class="o">.</span><span class="na">setContentType</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON_UTF8</span><span class="o">);</span>
+
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">HttpEntity</span><span class="o">&lt;&gt;(</span><span class="k">new</span> <span class="nc">Token</span><span class="o">(</span><span class="n">token</span><span class="o">),</span> <span class="n">headers</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="请求过滤">请求过滤</h3>
+<p>接下来我们提供 <code class="highlighter-rouge">ZuulFilter</code> 实现过滤用户请求，调用 <code class="highlighter-rouge">authenticationService.validate(token)</code> 认证用户token。
+若用户合法则路由用户请求到对应服务，否则返回 <code class="highlighter-rouge">403 forbidden</code>。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Component</span>
+<span class="kd">class</span> <span class="nc">AuthenticationAwareFilter</span> <span class="kd">extends</span> <span class="nc">ZuulFilter</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">AuthenticationAwareFilter</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">LOGIN_PATH</span> <span class="o">=</span> <span class="s">"/login"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">PathExtractor</span> <span class="n">pathExtractor</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">AuthenticationAwareFilter</span><span class="o">(</span>
+      <span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">,</span>
+      <span class="nc">PathExtractor</span> <span class="n">pathExtractor</span><span class="o">)</span> <span class="o">{</span>
+
+    <span class="k">this</span><span class="o">.</span><span class="na">authenticationService</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">pathExtractor</span> <span class="o">=</span> <span class="n">pathExtractor</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">filterType</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="s">"pre"</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">int</span> <span class="nf">filterOrder</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="mi">1</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">shouldFilter</span><span class="o">()</span> <span class="o">{</span>
+    <span class="nc">String</span> <span class="n">path</span> <span class="o">=</span> <span class="n">pathExtractor</span><span class="o">.</span><span class="na">path</span><span class="o">(</span><span class="nc">RequestContext</span><span class="o">.</span><span class="na">getCurrentContext</span><span class="o">());</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received request with query path: {}"</span><span class="o">,</span> <span class="n">path</span><span class="o">);</span>
+    <span class="k">return</span> <span class="o">!</span><span class="n">path</span><span class="o">.</span><span class="na">endsWith</span><span class="o">(</span><span class="no">LOGIN_PATH</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">Object</span> <span class="nf">run</span><span class="o">()</span> <span class="o">{</span>
+    <span class="n">filter</span><span class="o">();</span>
+    <span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">filter</span><span class="o">()</span> <span class="o">{</span>
+    <span class="nc">RequestContext</span> <span class="n">context</span> <span class="o">=</span> <span class="nc">RequestContext</span><span class="o">.</span><span class="na">getCurrentContext</span><span class="o">();</span>
+
+    <span class="k">if</span> <span class="o">(</span><span class="n">doesNotContainToken</span><span class="o">(</span><span class="n">context</span><span class="o">))</span> <span class="o">{</span>
+      <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"No token found in request header"</span><span class="o">);</span>
+      <span class="n">rejectRequest</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
+    <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+      <span class="nc">String</span> <span class="n">token</span> <span class="o">=</span> <span class="n">token</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
+      <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="n">responseEntity</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">.</span><span class="na">validate</span><span class="o">(</span><span class="n">token</span><span class="o">);</span>
+      <span class="k">if</span> <span class="o">(!</span><span class="n">responseEntity</span><span class="o">.</span><span class="na">getStatusCode</span><span class="o">().</span><span class="na">is2xxSuccessful</span><span class="o">())</span> <span class="o">{</span>
+        <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"Unauthorized token {} and request rejected"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+        <span class="n">rejectRequest</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
+      <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+        <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Token {} validated"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">rejectRequest</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">context</span><span class="o">.</span><span class="na">setResponseStatusCode</span><span class="o">(</span><span class="no">SC_FORBIDDEN</span><span class="o">);</span>
+    <span class="n">context</span><span class="o">.</span><span class="na">setSendZuulResponse</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">boolean</span> <span class="nf">doesNotContainToken</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nf">authorizationHeader</span><span class="o">(</span><span class="n">context</span><span class="o">)</span> <span class="o">==</span> <span class="kc">null</span>
+        <span class="o">||</span> <span class="o">!</span><span class="n">authorizationHeader</span><span class="o">(</span><span class="n">context</span><span class="o">).</span><span class="na">startsWith</span><span class="o">(</span><span class="no">TOKEN_PREFIX</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">String</span> <span class="nf">token</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nf">authorizationHeader</span><span class="o">(</span><span class="n">context</span><span class="o">).</span><span class="na">replace</span><span class="o">(</span><span class="no">TOKEN_PREFIX</span><span class="o">,</span> <span class="s">""</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">String</span> <span class="nf">authorizationHeader</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">context</span><span class="o">.</span><span class="na">getRequest</span><span class="o">().</span><span class="na">getHeader</span><span class="o">(</span><span class="no">AUTHORIZATION</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>最后提供服务应用入口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableCircuitBreaker</span>
+<span class="nd">@EnableZuulProxy</span>
+<span class="nd">@EnableDiscoveryClient</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">ManagerApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ManagerApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">application.yaml</code> 中定义路由规则：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">zuul</span><span class="pi">:</span>
+  <span class="na">routes</span><span class="pi">:</span>
+    <span class="na">doorman</span><span class="pi">:</span>
+      <span class="na">serviceId</span><span class="pi">:</span> <span class="s">doorman</span>
+      <span class="na">sensitiveHeaders</span><span class="pi">:</span>
+    <span class="na">worker</span><span class="pi">:</span>
+      <span class="na">serviceId</span><span class="pi">:</span> <span class="s">worker</span>
+    <span class="na">beekeeper</span><span class="pi">:</span>
+      <span class="na">serviceId</span><span class="pi">:</span> <span class="s">beekeeper</span>
+
+<span class="c1"># disable netflix eurkea since it's not used for service discovery</span>
+<span class="na">ribbon</span><span class="pi">:</span>
+  <span class="na">eureka</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">false</span>
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">microservice.yaml</code> 中定义服务中心地址：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">manager</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+</code></pre></div></div>
+
+<h2 id="项目归档-project-archive">项目归档 (Project Archive)</h2>
+<p><strong>经理</strong>在每次用户请求后将项目进行归档，如果将来有内容相同的请求到达，<strong>经理</strong>可以就近获取结果，不必再购买
+<strong>技工</strong>和<strong>养蜂人</strong>提供的计算服务，节省公司开支。</p>
+
+<p>对于归档功能的实现，我们采用了<strong>Spring Cache Abstraction</strong>，具体细节超出了这篇文章的范围，大家如果有兴趣可以
+查看github上<a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">workshop</a>的 <code class="highlighter-rouge">manager</code> 模块代码。</p>
+
+<h2 id="人力资源-human-resource">人力资源 (Human Resource)</h2>
+<p><strong>人力资源</strong>从运维层面保证服务的可靠性，主要功能有</p>
+
+<ul>
+  <li>
+    <p>弹性伸缩，以保证用户请求量超过<strong>技工</strong>或<strong>养蜂人</strong>处理能力后，招聘更多<strong>技工</strong>或<strong>养蜂人</strong>加入项目；当请求量回落后，裁剪<strong>技工</strong>或<strong>养蜂人</strong>以节省公司开支</p>
+  </li>
+  <li>
+    <p>健康检查，以保证<strong>技工</strong>或<strong>养蜂人</strong>告病时，能有替补接手任务</p>
+  </li>
+  <li>
+    <p>滚动升级，以保证项目需要新技能时，能替换、培训<strong>技工</strong>或<strong>养蜂人</strong>，不中断接收用户请求</p>
+  </li>
+</ul>
+
+<p><strong>人力资源</strong>的功能需要云平台提供支持，在后续的文章中会跟大家介绍，我们如何在华为云上轻松实现这些功能。</p>
+
+<h2 id="总结">总结</h2>
+<p>在这篇文章中，我们用一个公司的组织结构作为例子，给大家介绍了微服务的完整架构，以及如何使用微服务框架 <code class="highlighter-rouge">ServiceComb</code>
+快速开发微服务，以及服务间互通、契约认证。</p>
+
+<p><a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">Workshop demo</a>项目也包含大量完整易懂的测试
+代码，以及使用docker集成微服务，模拟生存环境，同时应用<a href="https://travis-ci.org/">Travis</a>搭建持续集成环境，体现
+DevOps在微服务开发中的实践。希望能对大家有所帮助。</p>
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+    <meta itemprop="datePublished" content="September 11, 2018">
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+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用Kubernetes对Saga进行压力测试
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="使用kubernetes对saga进行压力测试">使用Kubernetes对Saga进行压力测试</h2>
+
+<p>Apache ServiceComb (incubating) Saga 是一个微服务应用的数据最终一致性解决方案。Saga在try阶段直接提交事务，后续rollback阶段则通过反向的补偿操作来完成。</p>
+
+<p>基于ServiceComb Saga的项目，基本的构架如下：</p>
+
+<p><img src="https://raw.githubusercontent.com/apache/incubator-servicecomb-saga/master/docs/static_files/pack.png" alt="overview" /></p>
+
+<p>在我们的Saga实现中，业务服务引入Omega库，通过Omega将事务相关信息作为事件发送给Alpha server，由Alpha server统一进行协调。Alpha server将事务保存在PostgreSQL中，后台定期进行扫描。当扫描到异常事件时，尝试向事件对应的Omega发送gRPC请求，调用补偿方法。由于在原生业务中加入了Omega，进行了一系列后台操作，因此需要对整个框架进行压力测试，以获取框架的基础性能报告。</p>
+
+<p>在Cloud Native时代，容器几乎是标准的部署形态，应用程序容器化之后，通过Kubernetes进行容器编排，可以轻松的实现弹性扩容、任务调度等，非常适合对该项目进行压力测试。有鉴于此，我们将demo项目构建成docker镜像，并部署到Kubernetes集群中，通过Kubernetes的一系列组件，对demo方便的进行压力测试，以对Saga项目的性能有一个初步的评估。</p>
+
+<h3 id="kubernetize服务">“Kubernetize”服务</h3>
+
+<p>我们的demo项目由Java编写、maven作为依赖管理工具，在项目中引入了fabric8插件，编译程序时可以顺便将jar包构建成docker镜像。首先，我们构建alpha-server镜像：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd </span>alpha/alpha-server
+<span class="nv">$ </span>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span>
+</code></pre></div></div>
+
+<p>然后进入demo项目路径<code class="highlighter-rouge">saga-demo/saga-spring-demo</code>，执行相同的maven构建命令，构建完成后，我们可以看到产生了4个相关镜像：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>docker images | <span class="nb">grep </span>SNAPHOST  <span class="c"># {version}-SNAPSHOT是构建过程中使用的镜像标签</span>
+alpha-server:0.3.0-SNAPSHOT
+booking:0.3.0-SNAPSHOT
+car:0.3.0-SNAPSHOT
+hotel:0.3.0-SNAPSHOT
+</code></pre></div></div>
+
+<p>至此，我们已经构建好所需镜像，下一步便是编写Kubernetes所需的资源文件，这一步我们不再赘述，项目中已经有写好的yaml文件，路径在<code class="highlighter-rouge">saga-demo/saga-k8s-resources</code>，目录结构如下：</p>
+
+<pre><code class="language-base">.
+├── base
+│   ├── alpha.yaml
+│   ├── jmeter-collector.yaml
+│   └── postgresql.yaml
+├── README.md
+└── spring-demo
+    ├── booking.yaml
+    ├── car.yaml
+    ├── hotel.yaml
+    └── test
+        ├── jmeter.configmap.yaml
+        └── jmeter.yaml
+</code></pre>
+
+<p>其中<code class="highlighter-rouge">base</code>目录包含了alpha-server，postgresql以及用于收集测试报告的jmeter-collector3个服务。<code class="highlighter-rouge">spring-demo</code>目录包含了demo项目的所有服务，<code class="highlighter-rouge">spring-demo/test</code>路径下包含了对demo测试所需的服务。</p>
+
+<p>我们通过最基础的deployment和service对项目进行部署，程序之间通过域名互相访问，通过<code class="highlighter-rouge">kubectl</code>命令对Kubernetes资源进行部署：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>kubectl create ns servicecomb <span class="c"># 默认所有服务都在servicecomb namespace下</span>
+<span class="nv">$ </span>kubectl apply <span class="nt">-f</span> ./base
+<span class="nv">$ </span>kubectl apply <span class="nt">-f</span> ./spring-demo
+</code></pre></div></div>
+
+<p>我们通过<code class="highlighter-rouge">kubectl exec</code>命令进入一个pod，通过curl命令测试booking程序：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>kubectl <span class="nb">exec</span> <span class="nt">-it</span> <span class="nt">-n</span> servicecomb alpha-server-xxxxx
+<span class="nv">$ </span>curl http://booking.servicecomb:8083/booking/test/2/2
+resp: OK
+</code></pre></div></div>
+
+<p>至此，我们的demo项目就已经运行起来了。</p>
+
+<h3 id="部署jmeter">部署JMeter</h3>
+
+<p>我们选用<a href="https://jmeter.apache.org/">JMeter</a>作为压测工具，<a href="https://hub.docker.com/">Docker Hub</a>上已有公共镜像<a href="https://hub.docker.com/r/justb4/jmeter/">justb4/jmeter</a>，该镜像比较成熟，启动前会先侦测系统中可用内存，按照一定比例为jmeter申请jvm内存，可以最大化、合理的利用系统资源。</p>
+
+<p>当我们部署JMeter时，为了保持测试的灵活性，一般需要将JMeter脚本单独存储，而JMeter程序可以通过某种方式获取测试脚本，进而保证测试配置可以单独修改，不需要重新构建JMeter镜像。在Kubernetes中，我们可以将JMeter的配置文件存放于<a href="https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/">ConfigMap</a>，并通过<a href="https://kubernetes.io/docs/concepts/storage/volumes/">VolumeMount</a>挂载到JMeter容器的指定目录，这样，当我们需要修改测试配置时，只需修改ConfigMap，并重新部署JMeter deployment，即可完成配置的更新。</p>
+
+<p>部署ConfigMap命令如下：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>kubectl apply <span class="nt">-f</span> spring-demo/test/jmeter.configmap.yaml
+</code></pre></div></div>
+
+<h3 id="jmeter-镜像改造">JMeter 镜像改造</h3>
+
+<p>由于原有的JMeter容器执行完测试之后就退出了，如果在单机环境、仅运行docker容器的环境下，我们可以在执行<code class="highlighter-rouge">docker run</code>命令时通过-v参数将宿主机目录挂载到容器中，以保存测试的结果。但是Kubernetes环境，每个pod部署时都是根据一定的算法分配到不同节点上的，节点即是容器的宿主机。但是，登录到节点并找到相应目录来查看结果似乎是非常“不体面”的姿势，因此需要构建一个服务，收集JMeter生成的报告，并能够方便的展示。为此，我们用go语言实现了一个简单的文件上传服务，并附带静态文件服务。该服务收到JMeter测试报告达成的tgz压缩包，将其解压到相应静态文件服务目录中，这样，我们就可以方便的在集群中查看测试结果。该服务就是上文提到的jmeter-collector服务。</p>
+
+<p>这样一来，我们还需要对JMeter服务进行一些小改造，当执行完JMeter测试后，我们通过一个脚本将测试结果目录打包上传到jmeter-collector服务。这些改造都已经完成并做好了相应的镜像，直接使用项目中的资源即可：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>kubectl apply <span class="nt">-f</span> spring-demo/test/jmeter.yaml
+</code></pre></div></div>
+
+<p>现在，我们已经配置好JMeter相关资源，执行<code class="highlighter-rouge">kubectl logs</code>检查JMeter运行状况：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>kubectl get pod <span class="nt">-n</span> servicecomb | <span class="nb">grep </span>spring-demo-jmeter
+spring-demo-jmeter-xxxxx
+<span class="nv">$ </span>kubectl logs <span class="nt">-f</span> <span class="nt">-n</span> servicecomb pring-demo-jmeter-xxxxx
+...
+summary +    420 <span class="k">in </span>00:00:22 <span class="o">=</span>   18.8/s Avg:   214 Min:   111 Max:   471 Err:   207 <span class="o">(</span>49.29%<span class="o">)</span> Active: 12 Started: 12 Finished: 0
+</code></pre></div></div>
+
+<p>可以看到JMeter已经开始逐步增加测试线程进行压测了。</p>
+
+<p>由于我们用deployment部署JMeter，当执行结束后，容器正常退出，Kubernetes会重新启动容器，将测试服务再次拉起。因此测试会持续进行，直到我们将deployment删除。</p>
+
+<p>至此，我们已经完成了demo和相应的压力测试服务，整个集群中相关资源的结构如下图所示：</p>
+
+<p><img src="https://github.com/crystaldust/incubator-servicecomb-website/raw/blogs/loadtest-saga-with-k8s/assets/images/spring-demo.jpg" alt="demo-and-test-arch" /></p>
+
+<p>JMeter服务通过ConfigMap读取测试脚本，然后对booking服务发起压力测试，测试结束后，将结果上传至jmeter-collector服务。</p>
+
+<h3 id="查看测试结果">查看测试结果</h3>
+
+<p>JMeter容器运行完成后，在容器内生成了测试结果文件，并调用upload脚本打包上传到jmeter-collector服务，可以通过该服务直接在页面上查看结果。在Kubernetes中，在集群外部访问服务有两种方式：LoadBalancer或NodePort，前者一般由提供Kubernetes集群服务的云服务厂商提供，后者则可以通过节点的IP和端口来访问某个服务。由于我们使用了本地部署的Kubernetes集群，因此我们使用NodePort来查看访问结果。</p>
+
+<p>首先，调用<code class="highlighter-rouge">kubectl edit</code>命令，编辑jmeter-collector服务：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>kubectl edit svc <span class="nt">-n</span> servicecomb jmeter-collector
+<span class="c"># in the editor:</span>
+spec:
+  <span class="nb">type</span>: NodePort <span class="c">## 插入此行，注意yaml文件空格缩进</span>
+  exteranlIPs: <span class="o">[</span><span class="s2">"192.168.43.70"</span><span class="o">]</span> <span class="c">## 插入此行，根据Kubernetes集群中节点IP来设置</span>
+  ports:
+  - port: 80
+  targetPort: 8883
+  <span class="c">#....</span>
+</code></pre></div></div>
+
+<p>在笔者的环境中，制定了IP为192.168.43.70的节点作为NodePort的IP，对外暴露80端口，因此，在浏览器中直接访问<code class="highlighter-rouge">http://192.168.43.70</code>即可查看测试报告的结果了，结果如下图所示：</p>
+
+<p><img src="https://github.com/crystaldust/incubator-servicecomb-website/raw/blogs/loadtest-saga-with-k8s/assets/images/jmeter-collector.png" alt="jmeter-collector-dashboard" /></p>
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+            <h1 class="page__title" itemprop="headline">使用maven管理复杂依赖关系的技巧
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
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+
+  少于 1 分钟 阅读
+
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+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="依赖关系管理的核心问题">依赖关系管理的核心问题</h2>
+<p>依赖关系管理最让人头疼的问题是软件版本的选择。一个简化的例子：开发人员目前需要开发一个X项目，该项目需要同时引用项目A提供的组件，也需要引用项目B的组件，并且项目A和项目B同时依赖了项目C，但是版本号不同。</p>
+
+<ul>
+  <li>项目X的pom:</li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+	<span class="nt">&lt;groupId&gt;</span>groupA<span class="nt">&lt;/groupId&gt;</span>
+	<span class="nt">&lt;artifactId&gt;</span>artifactA<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;version&gt;</span>0.1.0<span class="nt">&lt;/version&gt;</span>   
+<span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;dependency&gt;</span>
+	<span class="nt">&lt;groupId&gt;</span>groupB<span class="nt">&lt;/groupId&gt;</span>
+	<span class="nt">&lt;artifactId&gt;</span>artifactB<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;version&gt;</span>0.1.0<span class="nt">&lt;/version&gt;</span>   
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<ul>
+  <li>项目A的pom:</li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+	<span class="nt">&lt;groupId&gt;</span>groupC<span class="nt">&lt;/groupId&gt;</span>
+	<span class="nt">&lt;artifactId&gt;</span>artifactC<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;version&gt;</span>0.1.0<span class="nt">&lt;/version&gt;</span>   
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<ul>
+  <li>项目B的pom:</li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>groupC<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>artifactC<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>0.2.0<span class="nt">&lt;/version&gt;</span>   
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>项目X在最终发布的时候，会出现如下几种情况：</p>
+
+<ol>
+  <li>使用项目C的0.1.0版本。由于项目B是使用0.2.0版本编译和测试的，那么组件B可能无法正常工作。比如项目B使用了0.2.0提供的新接口。</li>
+  <li>使用项目C的0.2.0版本。由于项目A是使用0.1.0版本编译和测试的，那么组件A可能无法正常工作。比如0.2.0版本和0.1.0不兼容，并且项目A恰好使用了这些不兼容的接口。</li>
+</ol>
+
+<p>可以看出，如果项目A和项目B使用的C组件存在接口不兼容的情况，无论怎么调整，项目X都无法正常工作，这个时候必须修改项目A的代码，使用和B同样的或者兼容的版本进行测试。进行依赖管理，能够做的事情，通常是保证对于公共组件的依赖，都使用较高的版本。尽管如此，我们通常还是会碰到一系列问题，特别是项目依赖关系非常复杂的情况。</p>
+
+<h2 id="最佳实践">最佳实践</h2>
+<p>很多项目都使用maven提供的dependencyManagement配置来管理依赖关系，保证不会因为引入了新的组件，导致基础组件的版本发生变更，出现漏测试的情况。该机制在Spring boot、ServiceComb等开源项目中广泛采用。对于需要提供额外三方软件使用清单的商用产品，这种管理方式可以增强认证信息的准确性。以ServiceComb为例，该项目引入的所有的三方件的版本都统一在:<br />
+ <a href="https://github.com/apache/incubator-servicecomb-java-chassis/blob/master/java-chassis-dependencies/pom.xml">https://github.com/apache/incubator-servicecomb-java-chassis/blob/master/java-chassis-dependencies/pom.xml</a> <br />
+管理，其他的子模块都不配置三方件的版本号，从而每个子模块依赖的三方件版本都是同一个版本，即使他们依赖的模块间接依赖了不同的三方件版本。<br />
+这种机制给使用者也带来了一定的好处，使用者可以采用dependencyManagement来定义自己的三方组件依赖关系，定义的时候，通过import方式继承。比如使用ServiceComb的微服务，可以采用如下方式管理依赖关系：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+      <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+      <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+      <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;/dependencies&gt;</span>
+<span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div></div>
+
+<h2 id="一个复杂的例子">一个复杂的例子</h2>
+<p>这个例子是在业务代码中使用Spring Boot、Spring Cloud、ServiceComb开源组件和ServiceComb商用组件的复杂场景。业务使用Spring Boot开发，并且启用了ServiceComb功能。可以通过下面的配置管理依赖关系。通过调整3个组件的顺序，决定优先使用哪些三方件。常见的业务场景有：</p>
+
+<ul>
+  <li>Spring Cloud依赖于Spring Boot，业务发现Spring Boot的bug，并升级了Spring boot，但是Spring Cloud没有配套对应版本的新版本。在Spring Boot接口兼容的情况下，可以将Spring Boot的依赖放到Spring Cloud前面，从而达到独立升级Spring Boot的目的。</li>
+  <li>Spring Cloud发现了bug，但是修复该bug的版本同时升级了Spring Boot，业务当前有其他原因不能使用Spring Boot的新版本，这个时候，可以将Spring Boot的依赖放到前面，保证了不会由于升级Spring Cloud，而引入Spring Boot新的版本。</li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependencyManagement&gt;</span>
+		<span class="nt">&lt;dependencies&gt;</span>
+		  <span class="nt">&lt;dependency&gt;</span>
+			<span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+			<span class="nt">&lt;artifactId&gt;</span>spring-boot-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+			<span class="nt">&lt;version&gt;</span>1.5.6.RELEASE<span class="nt">&lt;/version&gt;</span>
+			<span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+			<span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+		  <span class="nt">&lt;/dependency&gt;</span>
+		  <span class="nt">&lt;dependency&gt;</span>
+			<span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>
+			<span class="nt">&lt;artifactId&gt;</span>spring-cloud-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+			<span class="nt">&lt;version&gt;</span>Dalston.SR2<span class="nt">&lt;/version&gt;</span>
+		        <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+			<span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+		  <span class="nt">&lt;/dependency&gt;</span>
+		  <span class="nt">&lt;dependency&gt;</span>
+			<span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+			<span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+			<span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+			<span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+			<span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+		  <span class="nt">&lt;/dependency&gt;</span>
+		<span class="nt">&lt;/dependencies&gt;</span>
+	<span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div></div>
+
+<h2 id="总结">总结</h2>
+<p>上面列举了依赖关系管理的最佳实践。在配套不同组件进行业务代码开发时，如果碰到ClassNotFoundException、NoSuchMethodException等异常，可以通过IDE（比如eclipse）或者mvn dependency:tree命令来分析是否由于依赖关系错误，引入了某些三方件较老的版本，然后都可以利用dependencyManagement机制来强制约束三方件的版本号。正如最开始指出的，任何的三方件升级都可能存在风险，并且有些时候会出现无法解决，需要修改依赖组件代码的情况。一个好的实践是进行持续的集成，并增加适当的测试用例，尽早发现问题和解决依赖关系管理引入的接口不兼容问题。我们建议开发者能够结合上面的例子，适当调整下各个组件的顺序，观察一个项目实际使用的三方件版本的变化，深刻理解dependencyManagement的作用原理，这样能够帮助快速解决开发过程中碰到的ClassNotFoundException、NoSuchMethodException等问题。</p>
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+    <meta itemprop="headline" content="分布式调用链追踪">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb提供的分布式追踪能力">
+    
+    <meta itemprop="dateModified" content="August 08, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">分布式调用链追踪
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>分布式调用链追踪提供追溯微服务调用关系和调用处理时延的能力，便于用户检查分布式环境中微服务的健康状态。本指南将展示如何使用 <strong>mesher</strong> 提供的分布式调用链追踪能力。</li>
+</ul>
+
+<h1 id="前言">前言</h1>
+
+<ul>
+  <li>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/mesher-quick-start/">mesher快速入门</a>，并已成功运行用例服务。</li>
+</ul>
+
+<h1 id="启用">启用</h1>
+
+<ul>
+  <li>
+    <p>1、mesher main文件中添加对zipkin库依赖：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>_ <span class="s2">"github.com/go-chassis/go-chassis-plugins/tracing/zipkin"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>2、启发器bootstrap.go中添加默认处理函数，如图中箭头所示：</p>
+
+    <p><img src="/assets/images/mesher/mesher-tracing-func.png" alt="流量控制效果图" /></p>
+  </li>
+  <li>
+    <p>3、重新编译，分别替换<strong>mesher_webapp</strong>和<strong>mesher_calculator</strong>的可执行文件，启动mesher服务；</p>
+  </li>
+  <li>
+    <p>4、使用<strong>Docker</strong>运行<a href="http://servicecomb.apache.org/cn/docs/quick-start-advance/distributed-tracing/">Zipkin分布式追踪服务</a></p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 9411:9411 openzipkin/zipkin
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>5、多次点击 <em>Submit</em> 按钮发起服务调用；</p>
+  </li>
+  <li>
+    <p>6、打开 <a href="http://192.168.88.64:9411">http://192.168.88.64:9411</a>可查看分布式追踪结果如图，可以通过host地址判断调用路径：</p>
+
+    <p><img src="/assets/images/mesher/mesher-tracing-30111.png" alt="分布式追踪效果图" /></p>
+  </li>
+</ul>
+
+<h1 id="下一步">下一步</h1>
+
+<ul>
+  <li>
+    <p>了解更多<a href="/cn/users/distributed-tracing/">分布式调用链追踪</a></p>
+  </li>
+  <li>
+    <p>阅读<a href="/cn/docs/tracing-with-servicecomb/">基于 ServiceComb 和 Zipkin 的分布式调用链追踪</a>来进一步了解分布式追踪</p>
+  </li>
+  <li>
+    <p>认识 <a href="/cn/users/"><strong>ServiceComb</strong> 微服务开发框架</a></p>
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+  <li>
+    <p>通过 <a href="/cn/docs/linuxcon-workshop-demo/">Company应用</a> 更深入地了解微服务开发</p>
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content/cn/docs/mesher-quick-start-advance/mesher-flow-control/index.html

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+        
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+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>流量控制通过控制数据传输速率来避免微服务过载运行。本指南将展示如何使用 <strong>mesher</strong> 提供的流量控制能力。</li>
+</ul>
+
+<h1 id="前言">前言</h1>
+
+<ul>
+  <li>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/mesher-quick-start/">mesher快速入门</a>，并已成功运行用例服务。</li>
+</ul>
+
+<h1 id="开启">开启</h1>
+
+<ul>
+  <li>
+    <p>添加流量控制配置，重启服务，更改<strong>mesher_calculator</strong>配置文件<strong>chassis.yaml</strong>，其中流量控制包含下列选项：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">flowcontrol</span><span class="pi">:</span>
+  <span class="na">Provider</span><span class="pi">:</span>
+    <span class="na">qps</span><span class="pi">:</span>
+      <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>                 <span class="c1"># enable rate limiting or not</span>
+      <span class="na">global</span><span class="pi">:</span>
+        <span class="na">limit</span><span class="pi">:</span> <span class="m">0</span>                    <span class="c1"># default limit of provider</span>
+      <span class="na">limit</span><span class="pi">:</span>
+        <span class="na">Server</span><span class="pi">:</span> <span class="m">0</span>                  <span class="c1"># rate limit for request from a provider</span>
+</code></pre></div>    </div>
+
+    <p>该频率限制标识每秒接受的请求为0，即不提供服务。</p>
+  </li>
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+
+    <p><img src="/assets/images/mesher/mesher-flow-control-fail.png" alt="流量控制效果图" /></p>
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+  <li>
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+
+    
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="负载均衡">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用mesher提供的负载均衡能力">
+    
+    <meta itemprop="dateModified" content="August 08, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">负载均衡
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>mesher支持灵活的负载均衡算法。本指南将展示如何使用 <strong>mesher</strong> 提供的负载均衡能力。</li>
+</ul>
+
+<h1 id="前言">前言</h1>
+
+<ul>
+  <li>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/mesher-quick-start/">mesher快速入门</a>，并已成功运行用例服务。</li>
+</ul>
+
+<h1 id="负载均衡算法">负载均衡算法</h1>
+
+<ul>
+  <li>启动一个新的<strong>mesher_calculator</strong>和<strong>httpserver_calculator</strong>实例用于负载均衡测试，可以使用例子目录<a href="https://github.com/apache/servicecomb-mesher/tree/master/examples/quick_start/test_balance">test_balance</a>下的服务：</li>
+  <li>
+    <p>1、修改mesher_calculator配置文件<strong>microservice.yaml</strong>中的服务name为<strong>calculator</strong>；<br />
+更改配置<strong>chassis.yaml</strong>监听的地址和端口避免冲突：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:40102
+listenAddress: 127.0.0.1:30101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30108
+listenAddress: 127.0.0.1:30102  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30109
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>2、 启动<strong>mesher_calculator</strong>，需要设置mesher_calculator的<strong>SPECIFIC_ADDR</strong>地址，该地址用于将mesher和http服务绑定起来；</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nb">export </span><span class="nv">SPECIFIC_ADDR</span><span class="o">=</span>127.0.0.1:4537
+  ./mesher
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>3、 默认情况下会使用roundbin（轮询）负载均衡算法，另外还支持Random和SessionStickiness负载均衡算法。 我们修改mesher_webapp的配置文件chassis.yaml，将负载均衡方法配置为Random：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>loadbalance:
+  strategy:
+    name: Random
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>4、 开启httpserver_calculator服务新实例，监听4537端口；</p>
+  </li>
+  <li>
+    <p>5、 此时点击 <em>Submit</em> 按钮就可以看到如下两个界面中的BMI Instance ID随机出现。</p>
+
+    <p><img src="/assets/images/mesher/mesher-testpythonhttp.png" alt="bmi测试初始化图1" /><br /></p>
+
+    <p><img src="/assets/images/mesher/mesher-testpythonhttp2.png" alt="bmi测试初始化图2" /></p>
+  </li>
+</ul>
+
+<h1 id="下一步">下一步</h1>
+
+<ul>
+  <li>
+    <p>阅读<a href="/cn/docs/mesher-quick-start-advance/mesher-flow-control/">流量控制快速入门</a></p>
+  </li>
+  <li>
+    <p>了解更多<a href="/cn/users/service-configurations/#负载均衡策略">负载均衡</a>的使用方式</p>
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+            
+
+            
+            
+
+            <li><a href="/cn/docs/mesher-quick-start-advance/mesher-flow-control/" class="">mesher流量控制</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/docs/mesher-quick-start-advance/mesher-service-management/" class="active">mesher服务治理</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/docs/mesher-quick-start-advance/mesher-distributed-tracing/" class="">mesher分布式调用链追踪</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">一键微服务开发工具 Toolkit</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/docs/toolkit/quick-start/" class="">入门指南</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/docs/toolkit/oas-validator/" class="">OpenAPI V3 Spec校验工具</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">异构、多服务中心通讯 Syncer</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/docs/syncer/quick-start/" class="">入门指南</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/docs/syncer/multi-servicecenters/" class="">异构服务中心通讯</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="服务治理">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb提供的服务治理能力">
+    
+    <meta itemprop="dateModified" content="August 08, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务治理
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>服务治理主要用于对分布式系统中大量微服务进行有效控制管理。本指南将会展示如何使用 <strong>mesher</strong> 提供的服务治理能力。</li>
+</ul>
+
+<h1 id="前言">前言</h1>
+
+<ul>
+  <li>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/mesher-quick-start/">mesher快速入门</a>和<a href="/cn/docs/quick-start-advance/load-balance/">mesher负载均衡</a>，并已成功运行mesher用例服务。</li>
+</ul>
+
+<h1 id="灰度发布">灰度发布</h1>
+
+<h2 id="配置">配置</h2>
+
+<ul>
+  <li>
+    <p>1、更新版本号： 分别更改两个<strong>mesher_calculator</strong>实例的配置文件<strong>microservice.yaml</strong>，更新<strong>version</strong>字段分别为<strong>1.1.1</strong>和<strong>1.1.2</strong>，重启mesher服务，可以看到服务版本号发生了变更。如图中所示：</p>
+
+    <p><img src="/assets/images/mesher/mesher-ser-manage-ver.png" alt="灰度发布版本图" /></p>
+  </li>
+  <li>
+    <p>2、配置路由信息，更改mesher_webapp的配置文件router.yaml，按实例版本更新权重信息，并重启服务：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">routeRule</span><span class="pi">:</span>
+  <span class="na">calculator</span><span class="pi">:</span>        <span class="c1">#service name</span>
+    <span class="pi">-</span> <span class="na">precedence</span><span class="pi">:</span> <span class="m">2</span>    <span class="c1">#precedence of route rule</span>
+      <span class="na">route</span><span class="pi">:</span>           <span class="c1">#route rule list</span>
+      <span class="pi">-</span> <span class="na">tags</span><span class="pi">:</span>
+          <span class="na">version</span><span class="pi">:</span> <span class="s">1.1.1</span>
+        <span class="na">weight</span><span class="pi">:</span> <span class="m">70</span>     <span class="c1">#weight of 20%</span>
+      <span class="pi">-</span> <span class="na">tags</span><span class="pi">:</span>
+          <span class="na">version</span><span class="pi">:</span> <span class="s">1.1.2</span>
+        <span class="na">weight</span><span class="pi">:</span> <span class="m">30</span>     <span class="c1">#weight of 20%</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="验证">验证</h2>
+
+<ul>
+  <li>此时大量点击 <em>Submit</em> 按钮就可以看到BMI Instance ID按配置的比例交替出现。</li>
+</ul>
+
+<h1 id="服务熔断及恢复">服务熔断及恢复</h1>
+
+<h2 id="配置-1">配置</h2>
+
+<ul>
+  <li>
+    <p>1、 更改断流器配置，更改mesher_webapp的配置文件chassis.yaml，设置其中的断流器配置为：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">isolation</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">timeout</span><span class="pi">:</span>
+      <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+    <span class="na">timeoutInMilliseconds</span><span class="pi">:</span> <span class="m">1000</span>            <span class="c1">#超时时间</span>
+    <span class="na">maxConcurrentRequests</span><span class="pi">:</span> <span class="m">1</span>
+<span class="na">circuitBreaker</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+    <span class="na">forceOpen</span><span class="pi">:</span> <span class="no">false</span>
+    <span class="na">forceClosed</span><span class="pi">:</span> <span class="no">false</span>
+    <span class="na">sleepWindowInMilliseconds</span><span class="pi">:</span> <span class="m">10000</span>    <span class="c1">#熔断恢复时间10秒</span>
+    <span class="na">requestVolumeThreshold</span><span class="pi">:</span> <span class="m">1</span>          <span class="c1">#请求量限制</span>
+    <span class="na">errorThresholdPercentage</span><span class="pi">:</span> <span class="m">1</span>
+<span class="na">fallback</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+    <span class="na">maxConcurrentRequests</span><span class="pi">:</span> <span class="m">1</span>
+<span class="na">fallbackpolicy</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">policy</span><span class="pi">:</span> <span class="s">returnnull</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>2、 关闭test_balance目录下的服务实例；</p>
+  </li>
+</ul>
+
+<h2 id="验证-1">验证</h2>
+
+<ul>
+  <li>
+    <p>1、传入负数参数，响应超时，mesher_webapp断流器生效，下图一是mesher_webapp日志截图，表明断流器启用，下图二是传入负数参数触发断流器时的返回值，下图三表示断流器生效后对所有请求都按配置返回nil；</p>
+
+    <p><img src="/assets/images/mesher/mesher-circuitbreaker.png" alt="断流器生效日志图" /></p>
+
+    <p><img src="/assets/images/mesher/mesher-circuitbreaker-ret.png" alt="断流器生效日志图" /></p>
+
+    <p><img src="/assets/images/mesher/mesher-circuitbreaker-ret-nil.png" alt="断流器生效日志图" /></p>
+  </li>
+  <li>
+    <p>2、根据配置参数sleepWindowInMilliseconds，过10秒后服务自动恢复</p>
+  </li>
+</ul>
+
+<h1 id="下一步">下一步</h1>
+
+<ul>
+  <li>
+    <p>阅读<a href="/cn/docs/mesher-quick-start-advance/mesher-distributed-tracing/">分布式追踪快速入门指南</a></p>
+  </li>
+  <li>
+    <p>了解更多<a href="/cn/users/service-configurations/">服务治理</a>的使用方式</p>
+  </li>
+</ul>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="mesher快速入门">
+    <meta itemprop="description" content="介绍如何使用mesher快速改造微服务应用">
+    
+    <meta itemprop="dateModified" content="August 08, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">mesher快速入门
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h1 id="安装运行环境">安装运行环境</h1>
+
+<ul>
+  <li>
+    <p>安装<strong>git</strong>，详情可参考<a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git" target="_blank">git安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装<strong>golang 1.12.7</strong> ，详情可参考<a href="https://golang.google.cn/doc/install" target="_blank">Go安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装<strong>python 2.7</strong>，详情可参考<a href="https://wiki.python.org/moin/BeginnersGuide/Download" target="_blank">python安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装<strong>nodejs v10.16.2</strong>，详情可参考<a href="https://nodejs.org/en/download/" target="_blank">nodejs安装教程</a>。</p>
+  </li>
+</ul>
+
+<h1 id="运行-service-center">运行 Service Center</h1>
+
+<p>在 <strong>ServiceComb</strong> 微服务框架中，<strong>Service Center</strong> 提供服务注册及服务发现功能，可直接使用 Docker 运行。</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest
+</code></pre></div></div>
+
+<p><em>您可以通过阅读<a href="/cn/users/setup-environment/#运行service-center">环境配置</a>获取在本地以二进制方式运行<strong>Service Center</strong>和<strong>front</strong>的方法。</em></p>
+
+<h1 id="使用mesher接入servicecomb微服务体系">使用mesher接入servicecomb微服务体系</h1>
+
+<h2 id="案例背景">案例背景</h2>
+
+<ul>
+  <li>本用例主要是帮助用户快速入门<strong>mesher sidecar模式</strong>；希望用户通过该例子，快速上手使用mesher服务，了解mesher的工作模式，并了解如何通过mesher的帮助改造已有的http服务，接入ServiceComb微服务体系，得到go-chassis微服务框架提供的负载均衡、流控、服务治理、调用链追踪等微服务能力。完整案例将提交至<a href="https://github.com/apache/servicecomb-mesher/tree/master/examples/quick_start">案例下载</a>.</li>
+</ul>
+
+<h2 id="用例服务介绍">用例服务介绍</h2>
+
+<ul>
+  <li>
+    <p>如下图所示，用例中的服务部署在地址为192.168.88.64的机器上，用户在地址为192.168.88.78的机器上通过浏览器发起请求；</p>
+  </li>
+  <li>
+    <p>1、 <strong>httpserver_calculator</strong>：基于python语言实现的http体质指数服务，可替换为任何语言开发的http服务；</p>
+  </li>
+  <li>
+    <p>2、 <strong>httpserver_webapp</strong>：基于nodejs语言实现的web服务，用于在浏览器上展示可视化结果；</p>
+  </li>
+  <li>
+    <p>3、 <strong>mesher_webapp</strong>：通过sidecar模式为httpserver_webapp提供服务的mesher实例；</p>
+  </li>
+  <li>
+    <p>4、 <strong>mesher_calculator</strong>：通过sidecar模式为httpserver_calculator提供服务的mesher实例；</p>
+  </li>
+  <li>
+    <p>5、 <strong>servicecenter</strong>：服务中心，接收mesher服务的注册，提供服务发现、路由查询、服务监控功能；</p>
+
+    <p><img src="/assets/images/mesher/mesher-deployment-simple.png" alt="mesher部署图" /></p>
+  </li>
+</ul>
+
+<h2 id="流程详情">流程详情</h2>
+
+<ul>
+  <li>
+    <p>1、 浏览器[192.168.88.78]对 <strong>httpserver_webapp</strong> 服务发起http调用<a href=""></a><a href="http://192.168.88.64:4597/calculator/bmi">http://192.168.88.64:4597/calculator/bmi</a>；</p>
+  </li>
+  <li>
+    <p>2、 httpserver_webapp服务接收请求，并发起对地址<a href=""></a><a href="http://calculator/bmi">http://calculator/bmi</a>的http调用，因为设置了代理<a href=""></a><a href="http://127.0.0.1:30101">http://127.0.0.1:30101</a>，<strong>httpserver_webapp</strong> 发起的请求将被转发到 <strong>mesher_webapp</strong> 服务；</p>
+  </li>
+  <li>
+    <p>3、 <strong>mesher_webapp</strong> 根据请求的服务名(microservice.yaml配置的服务名<strong>calculator</strong>）从服务中心<strong>servicecenter</strong>获得该服务名的地址，转发到<strong>mesher_calculator</strong>；</p>
+  </li>
+  <li>
+    <p>4、 <strong>mesher_calculator</strong>服务根据设置好的specific地址，转发到自己绑定的体质指数<strong>calculator</strong>服务(<strong>httpserver_calculator</strong>)进行处理；</p>
+  </li>
+  <li>
+    <p>5、 <strong>httpserver_calculator</strong>会根据用户身高和体重进行计算，并返回自己的服务标识展示在界面上；流程图如下所示：</p>
+
+    <p><img src="/assets/images/mesher/mesher-flowchart-simple.png" alt="mesher流程图" /></p>
+  </li>
+</ul>
+
+<h2 id="环境搭建">环境搭建</h2>
+
+<ul>
+  <li>
+    <p>1、 编译 <strong>mesher</strong> ：<a href="https://github.com/apache/servicecomb-mesher">下载地址</a>， 按README.md编译项目得到可执行文件mesher(linux)，windows(mesher.exe)；</p>
+  </li>
+  <li>
+    <p>2、 创建 <strong>mesher_webapp</strong> 用于为<strong>httpserver_webapp</strong>服务： 在mesher目录下执行下列linux命令创建mesher_webapp，此处除了可执行文件，还需要拷贝conf</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">mkdir</span> /usr/local/src/mesher_webapp
+<span class="nb">cp</span> ./mesher /usr/local/src/mesher_webapp
+<span class="nb">cp</span> <span class="nt">-r</span> ./conf /usr/local/src/mesher_webapp
+</code></pre></div>    </div>
+
+    <p>更改conf中配置文件，microservice.yaml中的<strong>服务name</strong>，从hellomesher改为<strong>webapp</strong>；更改chassis.yaml中监听的服务地址，从本地回环（127.0.0.1）地址改为<strong>内网ip</strong>（linux下通过ifconfig查看，如192.168.88.64）:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:40101
+listenAddress: 127.0.0.1:30101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30101
+listenAddress: 127.0.0.1:30102  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30102
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>3、 创建<strong>mesher_calculator</strong></p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">mkdir</span> /usr/local/src/mesher_calculator
+<span class="nb">cp</span> ./mesher /usr/local/src/mesher_calculator
+<span class="nb">cp</span> <span class="nt">-r</span> ./conf /usr/local/src/mesher_calculator
+</code></pre></div>    </div>
+
+    <p>更改conf中配置文件，分别更改<strong>microservice.yaml</strong>中的<strong>服务name</strong>为体质指数微服务名<strong>calculator</strong>；<br />
+更改<strong>mesher_calculator</strong>配置<strong>chassis.yaml</strong>监听的地址和端口：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:40107
+listenAddress: 127.0.0.1:30101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30111
+listenAddress: 127.0.0.1:30102  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30112
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>4、 启动mesher服务，分别进入<strong>mesher_webapp</strong>和<strong>mesher_calculator</strong>，启动服务，其中需要设置mesher_calculator的<strong>SPECIFIC_ADDR</strong>地址，该地址用于将mesher和http服务绑定起来；</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/mesher_calculator
+<span class="nb">export </span><span class="nv">SPECIFIC_ADDR</span><span class="o">=</span>127.0.0.1:4540
+./mesher
+</code></pre></div>    </div>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/mesher_webapp
+./mesher
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>5、 启动<strong>httpserver_webapp</strong>服务：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/httpserver_webapp
+npm <span class="nb">install
+export </span><span class="nv">http_proxy</span><span class="o">=</span>http://127.0.0.1:30101
+node ./httpserver_webapp.js
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>6、 <strong>httpserver_calculator</strong>作为体质指数计算服务，需要安装python2.7，依赖BaseHTTPServer包：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/httpserver_calculator
+./httpserver_calculator.py
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="开始测试">开始测试</h2>
+
+<ul>
+  <li>
+    <p>1、 浏览器打开页面<a href="http://192.168.88.64:30103">http://192.168.88.64:30103</a> (如果打不开需要开启服务中心service-center的front服务，参考 <a href="http://servicecomb.apache.org/cn/users/setup-environment/#%E8%BF%90%E8%A1%8Cservice-center">http://servicecomb.apache.org/cn/users/setup-environment/#%E8%BF%90%E8%A1%8Cservice-center</a>) 查看服务，其中地址service-center服务启动的地址，看到如图界面。<strong>webapp</strong>代表<strong>mesher_webapp</strong>服务，这里展示的是microservice.yaml中配置的服务名。<strong>calculator</strong>代表<strong>mesher_calculator</strong>服务，这里展示的是microservice.yaml中配置的服务名。大写的<strong>SERVICECENTER</strong>是服务中心；</p>
+
+    <p><img src="/assets/images/mesher/mesher-servercenter.png" alt="服务中心监控图" /></p>
+  </li>
+  <li>
+    <p>2、 浏览器打开<a href="http://192.168.88.64:4597">http://192.168.88.64:4597</a>，可以看到如下界面，为webapp呈现的静态页面：</p>
+
+    <p><img src="/assets/images/mesher/mesher-testinit.png" alt="bmi测试初始化图" /></p>
+  </li>
+  <li>
+    <p>3、 输入参数(180、70)点击submit，显示如下图：</p>
+
+    <p><img src="/assets/images/mesher/mesher-testpythonhttp.png" alt="bmi测试初始化图" /></p>
+  </li>
+</ul>
+
+<h1 id="下一步">下一步</h1>
+
+<ul>
+  <li>阅读<a href="/cn/docs/mesher-quick-start-advance/"><strong>mesher</strong>进阶</a>。</li>
+</ul>
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+	      
+	        ServiceComb提供了一套关于服务注册，服务发现，服务配置以及管理功能的微服务框架
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+    <meta itemprop="headline" content="如何设计一个优质的微服务框架：Apache ServiceComb 的开放性设计">
+    <meta itemprop="description" content="本文讲述了整个 开源微服务框架 Apache ServiceComb 设计形成的前因后果，尝试从理念、思想和实践结合的维度剖析一个优质的微服务框架应该具备哪些要素，包括但不限于 对开发者友好、高性能、内外部扩展性&gt;等。">
+    <meta itemprop="datePublished" content="April 25, 2018">
+    
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">如何设计一个优质的微服务框架：Apache ServiceComb 的开放性设计
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>【摘要】 一个优质的微服务框架需要考虑的要素众多，在满足微服务设计理念的前提下，也是一个不断实践优化的过程。  <br />
+本文讲述了整个 开源微服务框架 Apache ServiceComb 设计形成的前因后果，尝试从理念、思想和实践结合的维度剖析一个优质的微服务框架应该具备哪些要素，包括但不限于 对开发者友好、高性能、内外部扩展性等。  <br />
+阅读本文有利于加深对微服务理念和框架的理解，给予微服务用户或开发者以帮助，这也是 Apache ServiceComb 的前身华为云微服务引擎的智慧结晶，从细节处承载了华为云自身多年云化转型的经验。</p>
+
+<!-- more -->
+
+<h2 id="写在前面">写在前面</h2>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 的前身为华为云的 <a href="https://support.huaweicloud.com/usermanual-servicestage/zh-cn_topic_0053812706.html">微服务引擎 CSE (Cloud Service Engine) 云服务</a>,  ServiceComb 的早期版本和多数第一批做微服务或分布式框架先贤一样，为了追求高性能，做过非常多如 改善编码效率 和改进通信协议等尝试。然而，随着业务规模的递增，需求也逐渐呈现多样化，单方面通过传统手段追求高性能导致在面对多样化需求时遇到了各种挑战，遗留系统的通信、接入各种不同的终端、协议健壮性、防攻击等各种挑战迎面而来。</p>
+
+<p>Apache ServiceComb，愿景是帮助企业快速构建云原生应用，通过一系列解决方案帮助用户快速开发微服务应用的同时实现对这些微服务应用的高效运维管理，保持中立性以避免厂商LockIn成为了关键任务。对于此， Apache ServiceComb 需要有友好的机制能够对接各微服务主流技术栈技术 或 开发框架。</p>
+
+<p>在系列挑战的驱动下， Aapche ServiceComb 设计团队逐步形成了 “全面开放，使用标准协议，架构易于拆分和扩展，对开发人员友好，可以与业界其他主流框架互通集成” 的共识， 本文将着重分享这些共识是如何体现在Apache ServiceComb 的设计中的。</p>
+
+<h2 id="开放和标准">开放和标准</h2>
+
+<p>开放和标准应用到设计的不同的层面。一方面是连接组织和开发人员，一方面是连接异构系统。组织和开发人员的复杂性来源于技能的多样性，大家使用不同的开发语言，同一种开发语言存在多样的开发习惯；系统的多样性来源于系统之间的通信协议，为了实现与异构系统的通信，必须具备良好的适配不同通信协议的能力。</p>
+
+<h3 id="连接组织和开发人员">连接组织和开发人员</h3>
+
+<h4 id="编程风格">编程风格</h4>
+
+<p>每位技术人员都或多或少拥有自己的 Coding 习惯或爱好的技术， 使用个人熟练的方式从事技术工作往往更加高效和舒适。</p>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 的早期版本实现了 gRPC 协议，然而在项目演进过程中我们发现大量技术人员并不熟悉书写 IDL ， 对 IDL 具体支持哪些特性也不清楚。 大多数情况下，用户每碰到一个场景就需要翻开协议规范看一遍， 而 IDL 缺少配套的编辑或语法检查等工具也导致了开发效率的降低。</p>
+
+<p>于是 Apache ServiceComb 设计团队开始思考是否有方法能够在确保保持用户开发习惯的前提下支持 gRPC 。</p>
+
+<p>设计团队结合自己的 Java 编程史，分析当下主流框架，并听取社区用户的反馈找到了一些共性：</p>
+
+<ul>
+  <li>使用 RPC 方式描述对外接口。gRPC 、Corba 、WebService 等技术人员谙于此道。</li>
+  <li>使用 JAX-RS 或 Spring MVC 风格开发 REST 接口。REST 风格开发随着微服务架构兴起，JAX-RS 和 Spring MVC 已然成为 Java REST 的开发事实标准， Spring 的拥抱者都比较熟悉。</li>
+</ul>
+
+<p>Apache ServiceComb 很快在社区设计层面达成了一致，通过缺省支持以上共性来拥抱90%的开发者， 让大多数的 Java 开发者们能够快速开始工作。</p>
+
+<p>除以上共识外，Apache ServiceComb 还额外做了进一步的优化，以保证不同编程风格的兼容性，使用户或开发者倍感灵活及舒适。</p>
+
+<p>在下面的例子中，展示了 Provider和Consumer 代码的各种实现，在同一个微服务中，这些编程方式可以同时出现；同一段 Consumer 代码中可以访问各种不同的编程风格的 Provider 实现。</p>
+
+<p><strong>RPC 方式的 Provider</strong></p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RpcSchema</span><span class="o">(</span><span class="n">schemaId</span><span class="o">=</span><span class="s">"hello"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span><span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">){</span>
+    <span class="k">return</span><span class="s">"Hello"</span><span class="o">+</span><span class="n">name</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">){</span>
+    <span class="k">return</span><span class="s">"Helloperson"</span><span class="o">+</span><span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p><strong>JAX-RS 方式的 Provider</strong></p>
+
+<p><em>代码片段来自于 <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/jaxrs-sample">Apache ServiceComb JAX-RS sample</a></em></p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span><span class="o">=</span><span class="s">"jaxrsHello"</span><span class="o">)</span>
+<span class="nd">@Path</span><span class="o">(</span><span class="s">"/jaxrshello"</span><span class="o">)</span>
+<span class="nd">@Produces</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">JaxrsHelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span><span class="o">{</span>
+
+  <span class="nd">@Path</span><span class="o">(</span><span class="s">"/sayhi"</span><span class="o">)</span>
+  <span class="nd">@POST</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">){</span>
+    <span class="k">return</span><span class="s">"Hello"</span><span class="o">+</span><span class="n">name</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Path</span><span class="o">(</span><span class="s">"/sayhello"</span><span class="o">)</span>
+  <span class="nd">@POST</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">){</span>
+    <span class="k">return</span><span class="s">"Helloperson"</span><span class="o">+</span><span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p><strong>Spring MVC 方式的 Provider</strong></p>
+
+<p><em>代码片段来自于 <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/springmvc-sample">Apache ServiceComb Spring MVC sample</a></em></p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span><span class="o">=</span><span class="s">"springmvcHello"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span><span class="o">=</span><span class="s">"/springmvchello"</span><span class="o">,</span><span class="n">produces</span><span class="o">=</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span><span class="o">{</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span><span class="o">=</span><span class="s">"/sayhi"</span><span class="o">,</span><span class="n">method</span><span class="o">=</span><span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nd">@RequestParam</span><span class="o">(</span><span class="n">name</span><span class="o">=</span><span class="s">"name"</span><span class="o">)</span><span class="nc">String</span> <span class="n">name</span><span class="o">){</span>
+    <span class="k">return</span><span class="s">"Hello"</span><span class="o">+</span><span class="n">name</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span><span class="o">=</span><span class="s">"/sayhello"</span><span class="o">,</span><span class="n">method</span><span class="o">=</span><span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">){</span>
+    <span class="k">return</span><span class="s">"Helloperson"</span><span class="o">+</span><span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p><strong>RPC 方式访问上述三种服务的 Consumer</strong></p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RpcReference</span><span class="o">(</span><span class="n">microserviceName</span><span class="o">=</span><span class="s">"hello"</span><span class="o">,</span><span class="n">schemaId</span><span class="o">=</span><span class="s">"hello"</span><span class="o">)</span>
+<span class="kd">private</span> <span class="nc">Hello</span> <span class="n">hello</span><span class="o">;</span>
+<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">hello</span><span class="o">.</span><span class="na">sayHi</span><span class="o">(</span><span class="s">"JavaChassis"</span><span class="o">));</span>
+</code></pre></div></div>
+
+<p><em>以上代码片段全部出自 <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/">Apache ServiceComb Samples</a>，有兴趣者可阅读了解或贡献更多的智慧。</em></p>
+
+<p>直至此处，或许开发者会产生疑问，既然 Consumer 可以通过一致的 API 方式访问不同的Provider，为何还需要额外的 JAX-RS 和 Spring MVC 标签？</p>
+
+<p>原因是，这里的设计依据是 <a href="http://servicecomb.incubator.apache.org/cn/">Apache ServiceComb</a>的 Consumer考虑的不仅限于 类SDK 的 Consumer，还有浏览器等非 SDK 类的 Consumer，浏览器的 Conumer 识别的是 Http 形式的消息。 通过定义和使用这些标签， 我们可以更加精细的指定浏览器如何访问后台接口。 类似于 Web Service 的 WSDL 描述语言， Apache ServiceComb 称之为<a href="http://servicecomb.incubator.apache.org/cn/users/service-contract/">服务契约</a>。</p>
+
+<p>服务的契约会在服务运行时通过代码定义自动生成，并注册到<a href="https://github.com/apache/incubator-servicecomb-service-center">服务中心</a>。契约也可在运行时用于独立的服务治理逻辑开发，生成 Consumer 代码。此外，也可作为 API 文档对外发布，供非 SDK 的 Consumer 参考。</p>
+
+<h4 id="服务契约"><strong><a href="http://servicecomb.incubator.apache.org/cn/users/service-contract/">服务契约</a></strong></h4>
+
+<p>微服务强调服务自治，对外体现的功能全部以松耦合的接口方式提供，并且只能以通信的方式实现相互访问。此原则给团队协作带来了根本性的变革。</p>
+
+<p>微服务的一个开发团队通常由5~6个人的全功能团队组成，端到端的完成 场景需求分析、架构功能设计、开发和运维，团队组织结构和业务系统的架构相匹配。团队建立后的核心问题就是团队之间如何进行高效的协作沟通，以决定不同微服务之间的协作通信。</p>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">Apache ServiceComb</a> 通过确保让开发人员保持自己的固有编程习惯及设计上的松耦合灵活性，让微服务团队之间可以进行高效协作，以避免在不同的微服务团队讨论编程风格受限于历史旧账而浪费宝贵的精力和时间。</p>
+
+<p>在 RPC 的世界里，有 Corda IDL，WSDL，ProtoBuffer 等可以参考的优秀实践， REST 风格的接口让团队之间可以通过 HTTP 语义进行沟通，但却不能像 IDL 一样描述跨语言的数据格式。Open API 的出现很好地解决了这个问题。</p>
+
+<p>Open API 首先是一个不断发展壮大中的开放的标准。Open API 能兼顾 RPC 、REST 等不同的开发方式，并且吸收了大量的跨语言经验，能够在不同的语言之间进行解析。</p>
+
+<p>对于 Java 开发者，下面的代码片段是日常所打交道的：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">User</span><span class="pi">:</span>
+  <span class="s">type:object</span>
+  <span class="s">properties</span><span class="pi">:</span>
+<span class="na">age</span><span class="pi">:</span>
+  <span class="s">type:integer</span>
+</code></pre></div></div>
+
+<p>如果开发人员有丰富的跨语言开发经验，可以看出 Swagger 在解决跨语言编程方面API定义冲突的努力， 如 Swagger 通过 format 来定义数据类型的存储格式，以解决不同的语言在数据类型表示上的差异：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">User</span><span class="pi">:</span>
+  <span class="s">type:object</span>
+  <span class="s">properties</span><span class="pi">:</span>
+<span class="na">age</span><span class="pi">:</span>
+  <span class="s">type:integer</span>
+  <span class="s">format:int32</span>
+</code></pre></div></div>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache SerivceComb</a> 既遵循常规开发规范也特别关注开发效率。开发者可以先写接口定义后写代码， 也可直接通过自己熟悉的方式编写写代码， 两种方式都会生成 <a href="http://servicecomb.incubator.apache.org/cn/users/service-contract/">服务契约</a>（Open API 描述文件），并且将内容注册到<a href="https://github.com/apache/incubator-servicecomb-service-center">服务中心</a>。使用者可以从服务中心下载相关的服务契约进行开发。 Apache ServiceComb 的各种治理结构也是基于契约的，可以让开发者独立于业务实现对系统进行统一的管控治理。</p>
+
+<h3 id="连接异构系统">连接异构系统</h3>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 早期版本提供了gRPC、REST、SOAP等多种协议，当前主要<a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/">支持 REST 和Highway 高性能私有 RPC 两种协议</a>。</p>
+
+<h4 id="highway-高性能私有-rpc-协议"><a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/#highway-rpc%E5%8D%8F%E8%AE%AE">Highway 高性能私有 RPC 协议</a></h4>
+
+<p>gRPC 相对于 REST 的最显著优点就是性能，它采用长连接、高效的二进制序列化方式，提供多种语言支持， 提供了 IDL 语言约束开发者按照标准的方式工作， 一切看起来是那么的完美。</p>
+
+<p>实际上，<a href="http://servicecomb.incubator.apache.org/cn/">Apache ServiceComb </a>的第一轮重构，首选也是 gRPC 。历史第一次在<a href="https://support.huaweicloud.com/usermanual-servicestage/zh-cn_topic_0053812706.html">华为云 微服务引擎 CSE</a> 上线以后，面对了来自网关压力挑战。</p>
+
+<p>网关作为业务接入端，必须高效的管理连接和保证公平，长连接容易导致拒绝服务。gRPC 程序开发完成后，开发人员无法利用系统提供的各种工具进行测试，网络包分析也变得困难，给生产环境上的开发联调造成了困难。随着业务规模的增长，gRPC 面临了诸如“其他三方系统如何与之直接通信？ 如何跨网关与它间接通信？”等更严峻的挑战。</p>
+
+<p>解决这些问题，将需要我们扩展和改善老的协议和程序，提供 gRPC 客户端支持，开发者需自行提供一个额外的表示层用于业务接口的逻辑转换，造成大量的重复代码。同时由于 gRPC 依赖于接口定义，并根据定义生成代码，一套代码只能跑在 gRPC 协议上，如果用户希望业务应用可以使用如 REST等其他更加灵活的方式， 就需自行重新实现一套新的代码逻辑。据以上的血泪史， gRPC 最终被 Apache ServiceComb 设计团队定义为只能在中小型系统内部之间使用，并通过协议网关与外部系统进行通信。并实现了 <a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/#highway-rpc%E5%8D%8F%E8%AE%AE">高性能私有协议 Highway</a> 作为RPC首选默认协议。</p>
+
+<h4 id="rest-通信协议"><a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/">REST 通信协议</a></h4>
+
+<p>REST 相较 gRPC ，最大的痛点是性能。</p>
+
+<p>多数技术人员脑海里一个不成文的根深蒂固的观点：”二进制编码效率远高于文本协议，采用二进制编码的系统的性能远高于采用文本的 HTTP ”。该观点甚至会让多数决策止步于理论，多数人甚至不愿尝试去优化 REST。</p>
+
+<p>可喜的是 <a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 迈出了重构 REST 底层通信实现的第一步，基于 Netty 的异步框架来替换 Tomcat 实现，实践的效果大大超出预期，部分基准测试数据结果显示比 gRPC 还好， gRPC最终输在了HTTP2 协议上的额外报文。</p>
+
+<p>优化后的 REST 和业界开源的其他基于二进制的 RPC 实现的性能基本持平。在一个简单的提供数据库查询的代码逻辑中，优化后的REST通信框架处理时间，占比总处理时间远小于千分之一，这意味着再继续在框架层面进行大量优化也抵不上业务应用层面最简单的一个操作带来的消耗，Apache ServiceComb对 REST 的优化已经满足要求，最终也选择了 <a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/">REST</a> 作为首选和缺省协议(HTTP + json)。</p>
+
+<p>我们并没有就此止步。</p>
+
+<p>需要迁移到 <a href="https://support.huaweicloud.com/usermanual-servicestage/zh-cn_topic_0053812706.html">华为云 微服务引擎 CSE</a>  的业务日益增长，部分历史遗留系统也需进行对接。通信协议对应不同的开发者接口，每每增加通信协议，则需要对业务代码进行大量的重复构建，造成大量无谓消耗。这是当时的华为云化转型以及当下很多云化转型企业或者云原生企业必将面临的痛点。</p>
+
+<p>于是乎，通信协议层被剥离了出来，和业务代码隔离，系统运行基于契约，<a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 实现通信协议扩展机制。通信协议扩展机制，帮助用户解决与 gRPC 框架、自定义二进制框架等许多遗留系统的对接通信问题。</p>
+
+<p>在 Apache ServiceComb 框架中，<a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/">切换协议</a>非常简单，不需要修改一行业务代码。多个协议共存也是允许的。</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">ServiceComb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="s">address:0.0.0.0:8084</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="s">address:0.0.0.0:8094</span>
+</code></pre></div></div>
+
+<h2 id="扩展性">扩展性</h2>
+
+<p>扩展性是系统进一步发展的基石。<a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 创造性地将扩展性拓展到 Provider 和 Consumer，让开发者拥有一致的开发体验。</p>
+
+<h3 id="内部系统结构">内部系统结构</h3>
+
+<p>连接开发者和通信协议层面已经让系统具备了很大的扩展性。微服务化给系统解耦、团队自治带来了很大的灵活性，加快了开发生产效率，但同时带来了服务管控的复杂性，在微服务领域，不得不考虑雪崩效应、调用跟踪、性能监控与分析等实际管控治理问题。</p>
+
+<p>基于服务契约，<a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 提供了<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/handlers">动态插拔扩展的处理链机制</a>，并且为这些管控治理能力提供了默认实现，用户可以灵活插拔这些处理模块，或调整它们的顺序以应对不同的处理场景，或自行实现以增加新的处理模块。Provider 和 Consumer 都会经过该处理链，这给客户端治理功能开发带来了极大的便利性。Apache ServiceComb 的运行结构如下：</p>
+
+<p class="figure-caption"><img src="/assets/images/open-design-running-arch.png" alt="running-arch" class="align-center" />  <br />
+图1 Apache ServiceComb 运行时架构</p>
+
+<p>Apache ServiceComb 同时支持同步和异步两种编程接口，并在通信实现上采用了纯异步方式，对于运行模型的扩展，也是基于异步回调接口的。该方式提供了比同步模式（比如 Filter）更加优雅灵活的扩展方式。</p>
+
+<p>在Apache ServiceComb 结构中，几个核心的扩展机制均在 <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/core/src/main/java/org/apache/servicecomb/core">core 模块</a> 进行定义：</p>
+
+<p><strong><a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/core/src/main/java/org/apache/servicecomb/core/provider/producer">Producer Provider</a></strong></p>
+
+<p>Provider 编程模型的扩展，通过实现这个接口，可以适配不同的 Provider编 程风格；默认支持 RPC、Spring MVC 和 JAX-RS 三种风格。</p>
+
+<p><strong><a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/core/src/main/java/org/apache/servicecomb/core/provider/consumer">Consumer Provider</a></strong></p>
+
+<p>Consumer 编程模型的扩展，通过实现这个接口，可以适配不同的 Consumer 编程风格；默认支持 RPC和RestTemplate 两种风格。RestTemplate 是 Spring MVC 提供的 REST 编程接口，可以在服务层解除接口依赖，只依赖数据模型。</p>
+
+<p><strong><a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/core/src/main/java/org/apache/servicecomb/core/handler">Handler</a></strong></p>
+
+<p>处理链的接口，通过扩展该接口，可以在处理过程中插入任意的逻辑。默认已经支持<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/handlers/handler-loadbalance">负载均衡</a>、<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/handlers/handler-fault-injection">错误注入</a>、<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/handlers/handler-flowcontrol-qps">流量控制</a>和<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/handlers/handler-tracing-zipkin">调用链跟踪</a>等多个处理链。开发者可以针对 Consumer 和 Provider 定义不同的处理链，并且为访问不同的微服务定制不同的处理链。</p>
+
+<p><strong><a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/transports">Transport</a></strong></p>
+
+<p>通信协议扩展，默认支持<a href="http://servicecomb.incubator.apache.org/cn/users/communicate-protocol/">REST over Vertx、Rest over Servlet、Highway</a>协议。</p>
+
+<p><strong>Invocation</strong></p>
+
+<p>中立的对象。所有的运行模型都面向这个中立的对象进行编程，当定义好服务接口后，对服务的治理和服务业务逻辑的开发可并行进行。在编程模型和通信模型里面，也面向这个对象进行编解码。</p>
+
+<h3 id="对接外部系统">对接外部系统</h3>
+
+<p><a href="https://github.com/apache/incubator-servicecomb-java-chassis">Apache ServiceComb Java-chassis</a> 预留了对接外部系统的接口，以让开发者或用户可以灵活快速切换使用第三方提供的服务，这里所指的外部系统包括但不限于：服务注册发现的服务中心、配置管控和治理的配置中心、运行监控和运维的治理中心等。</p>
+
+<p>下图展示了不同的开发框架支持和运行的第三方系统情况，这些基础服务都给开发者预留了可以进行支持接入的接口。</p>
+
+<p class="figure-caption"><img src="/assets/images/open-design-third-party-plugin.png" alt="third-party-plugin" class="align-center" />   <br />
+图2 Apache ServiceComb 外部扩展接入</p>
+
+<p>重要的扩展：</p>
+
+<p><strong><a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/service-registry/src/main/java/org/apache/servicecomb/serviceregistry/client">ServiceRegistryClient</a>:</strong></p>
+
+<p>实现这个接口以对接不同的注册服务。</p>
+
+<p><strong><a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/foundations/foundation-config">ConfigCenterConfigurationSource</a></strong></p>
+
+<p>实现这个接口以对接不同的配置服务。</p>
+
+<p>此外，ServiceComb还提供了对接<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/tracing/tracing-zipkin">Zipkin</a>、Servo等开源系统的功能，这些可以从<a href="https://github.com/apache/incubator-servicecomb-java-chassis/">github代码</a>中查找到对应的例子。</p>
+
+<h3 id="运行环境集成">运行环境集成</h3>
+
+<p>一个完整的业务系统不是使用RPC框架就算完成了，它们还需要其他的计算资源。对于一般的业务系统都需要访问数据库，或者基于 J2EE 的设施进行工作。</p>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">开源微服务框架 Apache ServiceComb</a> 可以以轻量级的方式运行，也可集成到其他系统框架。下面的示意图说明了 Apache ServiceComb 的一些工作环境。</p>
+
+<p class="figure-caption"><img src="/assets/images/open-design-integrate-with-running-environment.png" alt="integrate-with-running-environment" class="align-center" />   <br />
+图3 Apache ServiceComb 运行环境集成</p>
+
+<ul>
+  <li>若业务只需 REST 接口，可以轻量级的方式运行 Apache ServiceComb 。所有的REST接口运行于ServiceComb 提供的 Netty HTTP 之上。</li>
+  <li>若业务是基于 J2EE 来构建，那么 Apache ServiceComb 可以作为一个 Servlet ，运行于 Web 容器里面（如 Tomcat、Jetty 等）。</li>
+  <li>若业务基于 Spring Boot 生态构建，Apache ServiceComb 可作为一个starter对外提供 REST 服务，开发者可以自由使用其他基于 Spring Boot 的功能。</li>
+</ul>
+
+<p>由于 Apache ServiceComb 使用了Spring，因此天然继承了Spring的原有优势，可和很多通用的组件很好的集成，如 mybatis、JPA 等。各种集成方式，都可以从<a href="http://servicecomb.incubator.apache.org/cn/">ServiceComb官网</a>或者<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/demo">ServiceComb 示例库</a>找到对应的例子。</p>
+
+<h2 id="写在最后">写在最后</h2>
+
+<p>开源微服务框架 Apache ServiceComb 的主体代码是由华为云微服务引擎捐赠给 Apache 软件基金会的，愿景是帮助企业快速构建云原生应用，通过一系列解决方案帮助用户快速开发微服务应用的同时实现对这些微服务应用的高效运维管理。本次设计团队将开放性设计部分细节点点滴滴分享出来也是为了能够解放开发者和用户。</p>
+
+<p>当前越来越多的贡献者已加入到 社区行列，Apache ServiceComb 会和这些志愿者们一起一如既往坚持这个理念，争取给业界带来更多好的技术和分享。也期望有更多有志者一起行动。</p>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/docs/join_the_community/"><strong>如何加入Apache ServiceComb 社区</strong></a></p>
+
+<p><strong>致谢原稿作者： 刘宝</strong></p>
+
+<p><strong>参考文献</strong></p>
+
+<p>[1] 开源微服务框架 Apache ServiceComb 官网</p>
+
+<p><a href="http://servicecomb.incubator.apache.org/cn/">http://servicecomb.incubator.apache.org/cn/</a></p>
+
+<p>[2] 开源微服务框架 Apache ServiceComb 代码</p>
+
+<p><a href="https://github.com/apache/incubator-servicecomb-java-chassis">https://github.com/apache/incubator-servicecomb-java-chassis</a></p>
+
+<p><a href="https://github.com/apache/incubator-servicecomb-service-center">https://github.com/apache/incubator-servicecomb-service-center</a></p>
+
+<p><a href="https://github.com/apache/incubator-servicecomb-saga">https://github.com/apache/incubator-servicecomb-saga</a></p>
+
+<p>[3] 华为云微服务引擎 CSE（Cloud Service Engine）</p>
+
+<p>入口 <a href="https://www.huaweicloud.com/product/cse.html">https://www.huaweicloud.com/product/cse.html</a></p>
+
+<p>资料 <a href="http://support.huaweicloud.com/cse_dld/index.html">http://support.huaweicloud.com/cse_dld/index.html</a></p>
+
+
+        
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content/cn/docs/opensource-project-is-not-so-far-away/index.html

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+    <meta itemprop="headline" content="开源项目没有那么遥远">
+    <meta itemprop="description" content="开源项目没有那么遥远">
+    <meta itemprop="datePublished" content="November 20, 2018">
+    <meta itemprop="dateModified" content="November 20, 2018">
+
+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">开源项目没有那么遥远
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="开源项目没有那么遥远">开源项目没有那么遥远</h2>
+
+<blockquote>
+  <p>前几天收到了Apache ServiceComb PMC的邀请邮件，这意味着我成为了一名Apache ServiceComb项目的Committer。喜悦之余，我想留下一篇博客作为自己工作的一个阶段性总结，同时也希望这篇文章能够给其他想要加入到开源社区的同学一点参考。</p>
+</blockquote>
+
+<h3 id="初次接触servicecomb">初次接触ServiceComb</h3>
+
+<p>最开始接触到“开源”的概念是在大学的计算机课程上，当时对于开源项目的印象就是：开源项目是由一群大牛程序员开发和维护的，作为小白的我只需要拿来用就好了。</p>
+
+<p>毕业之后参加工作，我被分到了一个跟开源项目相关的工作组，需要向<a href="https://servicecomb.apache.org/cn/" title="ServiceComb官网">Apache ServiceComb项目</a>提交代码。当时的心情真是既新奇又紧张，毕竟以前只是单纯地使用过开源软件，而现在自己终于要向开源软件项目提交代码了。这种能够在一个开源项目中提交自己代码的兴奋感，相信很多学软件专业的同学应该能够理解。但是自己又是刚开始工作的小白，担心自己写的代码太差了拿不出手，因此又紧张不已。而事实上我第一次提交代码的经过并没有预想中的那么多波折，作为一个开源小白，提上去的pull request有瑕疵是很正常的事情，根据检视者的意见修改好了就行——毕竟高手不一定高冷，社区的开发者们都是很热心的。</p>
+
+<p>有了第一次提交PR的经历后，后面的工作就慢慢变得轻车熟路了。平常我在开源社区主要做的就是领一些新特性或者修复bug的<a href="https://issues.apache.org/jira/projects/SCB/issues" title="Apache issues">issue</a>处理，提交代码或文档的修改。</p>
+
+<h3 id="参与的方式不仅仅是写代码">参与的方式不仅仅是写代码……</h3>
+
+<p>如前文所提到的，最初我参与Apache ServiceComb开源项目的内容是由工作驱动的。因为有一些新特性要完成，或者因为有一些bug要修复，所以我需要提交代码和更新相关文档。而在代码和文档之外的其他事务我并没有参与多少。</p>
+
+<p>其实从我开始向ServiceComb提交代码时，我就订阅了<a href="https://servicecomb.apache.org/cn/developers/subscribe-mail-list/" title="订阅邮件">Apache ServiceComb的邮件列表</a>，也加入了<a href="https://servicecomb.apache.org/cn/developers/use-gitter/" title="使用Gitter">Gitter聊天室</a>。不过由于对自己的技术没什么自信，也受限于内向的性格，我在这些沟通渠道内长期保持着旁观的状态。当时的想法是，讨论ServiceComb设计和发展的事情我又参与不了，看看大佬们讨论就可以，到时候我再捞几个issue来做就好了。然而这种想法是不对的，对于我们自身在开源社区中的发展也没有好处。要参与开源社区的事务，仅仅只是埋头提交代码是不够的，积极参与社区的讨论、沟通，保持自己在社区中的活跃度，也是评判自己在社区工作好坏的一项标准。这也符合Apache之道中“社区胜于代码”的理念。此外，把将要进行的事情放到邮件中讨论，也是一个文档归档的过程。后续想要回溯某个特性为什么会被加进来，或者某个bug是如何触发的时候，搜索相关的邮件就可以了。如果有新的贡献者想要参与到社区开发工作中来，他们也可以通过查阅邮件来了解很多信息。这在无形中节省了很多后续的维护和沟通成本。</p>
+
+<p>参与社区讨论的活跃程度也是评判一个开发者能否成为committer的重要标准。听先前已经进入ServiceComb社区的同事说，其实按照我的代码提交量来看，在之前我就可以成为committer了，然而由于我在社区沟通中的活跃度实在是太低了，所以才一直没有受到ServiceComb PMC的committer邀请……所以说，同学们一定不要被自己的腼腆性格坑了啊，要参与社区事务，就需要更积极地加入到讨论中来。</p>
+
+<h3 id="给有意者的一些建议">给有意者的一些建议</h3>
+
+<p>参与一个开源项目，对于自己阅读文档、分析源码、开发和沟通的能力都有很大的益处。这和开发一个业务系统是两种完全不同的体验，对于拓展个人的视野和经验很有帮助。如果进一步成为Apache committer，还有一些额外的福利哦，例如：</p>
+<ul>
+  <li>合入PR的权限：普通的贡献者只能等待其他committer来检视代码和帮你合入PR。如果你自己就是一名committer的话，那么你就有了合入PR的权限了；而且在你提交PR的时候，不用再像以前一样被动等待其他人来检视，你可以在Github的PR页面主动选择要求其他committer帮你检视代码，被你at到的committer会收到提醒检视的邮件，这样更快捷。</li>
+  <li>JetBrains开源license：如果你是一名Java开发人员，相信你应该听说过JetBrains的Intellij IDEA吧？IDEA有社区版和商业版之分，商业版的功能更丰富，不过需要付费使用。如果你成为了一个Apache项目的committer，那么你就可以申请Open Source License，免费使用商业版的IDEA，或者其他工具（如Goland）了。</li>
+  <li>技术水平的认可：成为Apache Committer本身就是一件可以证明你的技术能力的事情。在<a href="http://people.apache.org/committer-index.html" title="Apache committer index">Apache Committer 列表</a>页面，你可以看到所有的Apache Committer，表格的第三列显示了各个committer所参与的项目。当你参与的项目足够多时，还能成为Apache member，帮助大家孵化开源项目，这个层次相当于比普通committer更进一步了。</li>
+</ul>
+
+<p>如果想要参与到一个开源项目中，可以首先了解一下如何使用这个项目。给开源社区做贡献的方式不仅仅限于提交代码，<a href="https://github.com/apache/servicecomb-docs" title="ServiceComb文档项目">修复文档问题</a>可能是一个更好的切入点。通过阅读和修复文档问题，我们可以了解到一个项目的主要特性，这对于我们进一步了解项目源码也是很有帮助的。</p>
+
+<p>同时，<a href="https://servicecomb.apache.org/cn/developers/subscribe-mail-list/" title="订阅邮件">订阅邮件列表</a>和<a href="https://servicecomb.apache.org/cn/developers/use-gitter/" title="使用Gitter">使用Gitter</a>也很有必要。通过这些，我们不仅可以了解到项目的最新动态，也能够参与到社区的讨论中来。如果还不了解如何发起一场讨论的话，可以先看看社区里的开发者是怎么做的，参与到其他人的邮件讨论中去。碰到其他的使用者提问也可以上去帮助解答，这同样是一种参与贡献的方式。上文已经提到过了，参与讨论沟通是社区活动的重要内容。不用感到不好意思，开源社区本身就是开放的，我们欢迎更多的人能够参与到项目的建设中来。</p>
+
+<p>正所谓临渊羡鱼，不如退而结网。与其羡慕已经成功参与到开源项目中的同学，不如从现在开始行动，选择一个开源项目参与进去 ; )</p>
+
+<p>文章的最后，我想向给与我帮助和鼓励的社区团队成员致以感谢，谢谢大家热心的帮助和指导，让我从一名小白成长为Apache committer。</p>
+
+<blockquote>
+  <p>ps：在这里小小地安利一下，<a href="https://servicecomb.apache.org/cn/" title="ServiceComb官网">Apache ServiceComb项目</a>已经从Apache孵化器毕业，正式成为Apache顶级项目，这也是业界首个微服务项目在Apache孵化并毕业成为顶级项目。ServiceComb包含的几个子项目都处于如火如荼的发展势头中，欢迎大家参与到ServiceComb社区建设中来~</p>
+</blockquote>
+
+<h2 id="附committer权限设置步骤">附：committer权限设置步骤</h2>
+
+<p>当你收到Apache ServiceComb PMC的邀请邮件，这就意味着你的努力已经获得了PMC的认可，你可以选择成为committer了！建议你仔细阅读一遍邀请邮件，按照上面的指导来进行操作。这里我简要介绍一下我的操作步骤。</p>
+
+<ol>
+  <li>签署iCLA<br />
+在成为committer之前，你需要先确保自己已经<a href="http://www.apache.org/licenses/#clas" title="Contributor License Agreements">签署iCLA</a>。如果没有的话，可以先去<a href="http://www.apache.org/licenses/icla.pdf" title="下载ICLA文件">下载一份iCLA pdf文件</a>，注意<code class="highlighter-rouge">(optional) Public name</code>一栏填写自己的github id。注意这份PDF文件需要签名，签名内容是<code class="highlighter-rouge">Full Name</code>那一栏的你填的内容。<br />
+将签署好了的iCLA文件按照<a href="http://www.apache.org/licenses/#submitting" title="提交iCLA文件">iCLA文件提交说明</a>发送给<code class="highlighter-rouge">secretary@apache.org</code>，等待回信即可完成签署流程。</li>
+  <li>回复PMC的邀请邮件<br />
+完成iCLA的签署后，就可以在Apache PMC的邀请邮件上回复了，回复邮件发给<code class="highlighter-rouge">private@servicecomb.apache.org</code>，你需要说明自己接受邀请，并且告诉PMC你所想要使用的Apache id。已经被人申请了的Apache ID在<a href="http://people.apache.org/committer-index.html" title="Apache committer index">这里</a>都可以查到，选择的时候需要选一个还没有被人使用的id。</li>
+  <li>初始化Apache帐户密码<br />
+当收到Apache帐户创建成功的邮件（标题为<code class="highlighter-rouge">Welcome to the Apache Software Foundation (ASF)!</code>）时，你的Apache帐号就创建成功了，记得按照邮件中的提示，去设置一下自己的密码。重置密码的过程中需要使用你在签署iCLA时填写的邮箱地址。</li>
+  <li>设置committer权限<br />
+committer账号设置完成后，你还需要设置对Github上托管的Apache ServiceComb项目的仓库权限进行设置，设置流程可以参考<a href="https://servicecomb.apache.org/cn/developers/setup-committer-rights/" title="Committer权限设置">这篇博客</a>。需要补充的一点是，在对Github账号授权时，需要开启<a href="https://github.com/settings/two_factor_authentication/intro" title="Github双因子认证">双因子认证</a>，国内的同学只能选择使用双因子认证APP来做认证了。除了Github介绍页面上推荐的Authy、1Password和LastPass Authenticator，也可以使用Google的身份验证器，在APP store能够搜到，图标如下：
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diff --git a/content/cn/docs/osi-microservices/index.html b/content/cn/docs/osi-microservices/index.html
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
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+            
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+        
+      
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+      <section class="page__content" itemprop="text">
+        <p>​<strong>Event Date/Time</strong>: Thursday, October 11, 2018, 15:15 – 18:30</p>
+
+<p><strong>Event Location</strong>: Workshop Hall 3, Nimhans Convention Center, Bangalore, India</p>
+
+<p>Open Source India (OSI) is an attempt by the team at Open Source For You magazine in partnership with India’s Open Source community and industry—to bring various stake-holders under one roof. The mission of OSI is simple—to accelerate development and deployment of Open Source in India, and beyond.</p>
+
+<p>Around 70+ experts shared their knowledge and expertise in this Summit with around 20 Tech Talks and 11 Workshops with 8 different tracks.</p>
+
+<p><strong>Workshop</strong></p>
+
+<p>MONOLITH TO MICRO-SERVICES: A HANDS ON WORKSHOP FOR DEVELOPMENT OF MICRO-SERVICES USING OPEN SOURCE FRAMEWORKS</p>
+
+<p><img src="/assets/images/OSI/Title.png" alt="3" />
+<img src="/assets/images/OSI/Topics.png" alt="4" /></p>
+
+<h2 id="workshop-glimpse">Workshop Glimpse</h2>
+<p><img src="/assets/images/OSI/OSI-Workshop-1.jpg" alt="5" /></p>
+
+<h2 id="event-glimpse">Event Glimpse</h2>
+<p><img src="/assets/images/OSI/OSI-Event-Glimpse.jpg" alt="5" /></p>
+
+<h2 id="summary">Summary</h2>
+<ul>
+  <li>Around 70% of the Workshop attendees were already using Microservices in production.</li>
+  <li>Very few people were aware about leading Opensource Microservices framework, most of them were using some commercial Microservices solution.</li>
+  <li>Most of the attendees were not having clear directions of how to choose Opensource frameworks for their specific use cases.</li>
+  <li>Attendees were delighted to know that ServiceComb offers a complete full stack solution for Microservices and is backed by a big opensource community.</li>
+  <li>Most of them were able to understand how to develop microservices using ServiceComb SDK’s.</li>
+</ul>
+
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content/cn/docs/performance-test-on-seckill-with-jmeter/index.html

diff --git a/content/cn/docs/performance-test-on-seckill-with-jmeter/index.html b/content/cn/docs/performance-test-on-seckill-with-jmeter/index.html
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+    <meta itemprop="headline" content="使用JMeter对秒杀示例进行性能测试">
+    <meta itemprop="description" content="介绍如何使用JMeter进行性能测试以及获取秒杀示例的性能基线">
+    <meta itemprop="datePublished" content="September 15, 2017">
+    <meta itemprop="dateModified" content="September 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用JMeter对秒杀示例进行性能测试
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="背景">背景</h2>
+<p>　　<a href="https://github.com/ServiceComb/seckill">秒杀</a>是我们ServiceComb开源团队以领域驱动设计（<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>）为背景，从零开始构建一个微服务架构的示例项目；在《秒杀开发历程》系列博文中提到它作为一个高并发压力场景的应用，采用了<a href="https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs">CQRS</a>模式构建，因此我们将使用<a href="http://jmeter.apache.org/">JMeter</a>来对其进行性能评估。</p>
+
+<h2 id="制定用户行为模型">制定用户行为模型</h2>
+<p>　　因为秒杀的场景在现实生活中非常常见，所以用户行为模型非常容易设计：</p>
+<ol>
+  <li>客户不停的刷秒杀活动，直到刷出一个正在进行的秒杀活动；</li>
+  <li>刷出了秒杀活动后，马上请求秒杀优惠券；</li>
+  <li>无论是否成功，客户会稍后查询一次自己已经拥有的优惠券确定优惠券是否进入自己的账号。</li>
+</ol>
+
+<p>　　我们还需要一个管理员用户，隔一段时间就创建发布秒杀活动，当然活动包含的优惠券数量将会远少于客户的数量。
+　　
+　　用户行为模型在JMeter中体现为脚本逻辑，完成的脚本逻辑如下：</p>
+
+<p><img src="/assets/images/performance-test-on-seckill-with-jmeter-script.png" alt="图1 脚本模型" class="align-center" /></p>
+
+<p>　　脚本文件已经托管至秒杀项目中，可直接获取：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/seckill
+<span class="nb">cd </span>seckill/performance-test/script
+</code></pre></div></div>
+
+<h2 id="性能测试环境">性能测试环境</h2>
+<p>　　我们调来了两台云服务器进行性能测试，角色和配置如下：</p>
+<h3 id="秒杀服务器配置">秒杀服务器配置</h3>
+<p>　　承载秒杀示例所有的微服务和中间件，包括四个微服务（Admin、Command、Event和Query）、两个数据库（ReadDB和WriteDB）和一个Message Broker（ActiveMQ）。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>配置项</th>
+      <th>配置值</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>CPU</td>
+      <td>Intel Xeon E5-2690 3.0GHz * 16</td>
+    </tr>
+    <tr>
+      <td>MEM</td>
+      <td>64GB</td>
+    </tr>
+    <tr>
+      <td>OS</td>
+      <td>Ubuntu 16.04.2 LTS</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>　　为了能够便于配置和启动示例系统，我们采用《秒杀开发历程（三）》中的一键启动模式拉起所有的服务，因此Docker升级为当前最新版17.06.2-ce，能够支持配置Container使用CPU和内存的大小限制，以Admin微服务为例：
+　　</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="na">admin-service</span><span class="pi">:</span>
+    <span class="na">mem_limit</span><span class="pi">:</span> <span class="s">4096m</span>
+    <span class="na">cpu_count</span><span class="pi">:</span> <span class="m">4</span>
+    <span class="na">cpu_percent</span><span class="pi">:</span> <span class="m">50</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">seckill-admin-service:0.2.0-SNAPSHOT"</span>
+    <span class="na">hostname</span><span class="pi">:</span> <span class="s">admin-service</span>
+    <span class="na">links</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">mysql-write-db:write_db.servicecomb.io"</span>
+    <span class="na">environment</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s">JAVA_OPTS=-Dspring.profiles.active=prd -Dendpoints.shutdown.enabled=true</span>
+    <span class="na">ports</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">8081:8081"</span>
+</code></pre></div></div>
+
+<h3 id="加压机配置">加压机配置</h3>
+<p>　　加压机与秒杀服务器处于同一网络环境中，配置如下：
+　　
+| 配置项  | 配置值                            |
+| —- | —————————— |
+| CPU  | Intel Xeon E5-2690 3.0GHz * 16 |
+| MEM  | 32GB                           |
+| OS   | Ubuntu 16.04.2 LTS             |</p>
+
+<h2 id="启动测试">启动测试</h2>
+<p>　　我们设定测试场景为200客户，每隔1秒启动一个新客户；1个管理员每隔10秒发布1个秒杀活动，一共发布160次，每个秒杀活动包含50张优惠券，即一共投放8000张优惠券。整个测试持续半个小时。
+　　
+　　现在，我们切换到性能测试脚本目录下，执行下面的命令启动测试：
+　　</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jmeter <span class="nt">-n</span> <span class="nt">-t</span> seckill.jmx <span class="nt">-l</span> log.jtl
+</code></pre></div></div>
+
+<h2 id="测试结果">测试结果</h2>
+<p>　　测试完毕后通过下面的命令分析测试结果日志数据，请将<report folder="">替换为你的本地目录：</report></p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jmeter <span class="nt">-g</span> log.jtl <span class="nt">-o</span> &lt;report folder&gt;
+</code></pre></div></div>
+
+<p>　　我们需要先验证测试结果的正确性，查看数据统计图：</p>
+
+<p><img src="/assets/images/performance-test-on-seckill-with-jmeter-statistics.png" alt="图2 事务统计" class="align-center" /></p>
+
+<p>　　其中秒杀的失败率在96.45%，原因是Query对于活动的秒杀活动采用的是0.5秒刷新缓存的策略，在活动中的优惠券被秒杀一空下架前，短暂的时间内仍然能够查询到这个活动；架构中采用的<a href="https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs">CQRS</a>模式只能保证最终一致性，并不能保证实时一致性。
+　　
+　　成功秒杀的次数为225264 - 217264 = 8000，正好等于我们设定的优惠券投放量，其他事务的失败率均为0%，因此测试结果正确。</p>
+
+<h3 id="吞吐能力">吞吐能力</h3>
+<p>　　秒杀整体吞吐能力如下图：</p>
+
+<p><img src="/assets/images/performance-test-on-seckill-with-jmeter-tps-all.png" alt="图3 整体吞吐能力" class="align-center" /></p>
+
+<p>　　可以看到查询活跃的秒杀活动（刷券）事务处理量最高，稳定在4000左右，其他因为业务比例的原因较低，去掉查询活跃的秒杀活动事务后如下图：</p>
+
+<p><img src="/assets/images/performance-test-on-seckill-with-jmeter-tps-less.png" alt="图4 秒杀和优惠券查询" class="align-center" /></p>
+
+<p>　　秒杀和优惠券查询之间的差值是由于存在秒杀失败造成的，我们的用户行为模型是无论秒杀成功与否都会进行一次优惠券查询。</p>
+
+<h3 id="响应时间">响应时间</h3>
+<p>　　事务的响应时间我们可以看下面两个图：</p>
+
+<p><img src="/assets/images/performance-test-on-seckill-with-jmeter-latencies.png" alt="图5 响应时间" class="align-center" /></p>
+
+<p><img src="/assets/images/performance-test-on-seckill-with-jmeter-time-percentiles.png" alt="图6 响应时间分布" class="align-center" /></p>
+
+<p>　　75%的事务处理时间都在10ms以下，整体平均响应时间处于50ms以下。</p>
+
+<h2 id="瓶颈分析">瓶颈分析</h2>
+<p>　　依据执行过程中对于测试资源的观察，加压机CPU使用率基本已满（200线程并发），服务器CPU使用率低于20%，其他资源使用率很低。</p>
+
+<h2 id="总结">总结</h2>
+<p>　　通过这次性能测试，我们得知秒杀示例在使用一台普通服务器配置能够达到总体5000以上的TPS还能够保持较低的资源使用率，表现出良好的性能；未来我们会将秒杀示例部署在K8S群集中并配置弹性伸缩进行压力测试，您可以阅读我们<a href="http://servicecomb.io/cn/docs/stress-test-on-company-with-jmeter-in-k8s/">《在Kubernetes集群中使用JMeter对Company示例进行压力测试》</a>这篇文章展望。</p>
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+	        ServiceComb提供了一套关于服务注册，服务发现，服务配置以及管理功能的微服务框架
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+    <meta itemprop="datePublished" content="November 20, 2019">
+    <meta itemprop="dateModified" content="November 21, 2019">
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+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
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+            
+          </header>
+        
+      
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+      <section class="page__content" itemprop="text">
+        <p>近日，Apache ServiceComb与北京邮电大学“乐群学堂”联合举办“与Apache ServiceComb一起玩开源”讲座。Apache ServiceComb PMC成员马彬与华为开源软件架构师郑志鹏，为北邮的同学们带来“ServiceComb带你走进开源”和“使用ServiceComb快速开发高并发高可用电商系统实践使用微服务架构快速开发万级TPS高可用电商系统”的精彩演讲以及现场教学互动。</p>
+
+<p>本次讲座得到北邮计算机学院闫博、徐飒等老师以及广大同学的鼎力支持和参与。报名通道开放伊始，原定200个的参会名额即被定满，经过老师们积极协调临时增加了部分名额，但是由于场地资源有限，这次没有报上名的同学，期待下次再会面啦&gt;_&lt;~~</p>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/1.signup.jpg" alt="1" /> <img src="/assets/images/colleges_and_universities/BUPT/2.signup.jpg" alt="1" /></p>
+
+<p>讲座开展前期，同学们积极响应和回馈社区，ServiceComb通过建立社区交流群组，与同学互动交流，提前分享动手实践指南以及解答疑问。</p>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/3.answer.jpg" alt="1" /> <img src="/assets/images/colleges_and_universities/BUPT/4.answer.jpg" alt="1" /></p>
+
+<ul>
+  <li>讲座定于19:00开始，18:10会场前同学已经在有序地排队入场，给北邮的同学点赞</li>
+</ul>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/5.enter.jpg" alt="1" /></p>
+
+<ul>
+  <li>为“乐群学堂”的师生们点赞，非常贴心地在走廊安排了临时加座~~~</li>
+</ul>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/6.meeting.jpg" alt="1" /></p>
+
+<p><strong>主题 1: 《Apache ServiceComb带你走进开源开发》</strong></p>
+
+<p><a href="/assets/slides/20191120/Apache_ServiceComb.pdf">中文PDF下载</a></p>
+
+<p>来自华为开源软件部的Apache ServiceComb PMC成员马彬为同学们分享了开源软件的演进历史、开源基金会介绍、开源社区以及基于首个Apache ServiceComb微服务项目的开源开发实战内容。</p>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/7.meeting.jpg" alt="1" /></p>
+
+<hr />
+<p><strong>主题 2: 《使用ServiceComb快速开发高并发高可用电商系统实践》</strong></p>
+
+<p><a href="/assets/slides/20191120/2.Apache_ServiceComb_builds_online_store.pdf">中文PDF下载</a></p>
+
+<p>华为开源软件架构师郑志鹏为同学们普及了微服务的概念和作用，并从基于Apache ServiceComb构建的万级TPS高可用电商系统案例出发，现场“庖丁解牛”动手教学，讲解如何做微服务设计、如何合理拆分微服务、如何分库分表，以及如何使用Apache ServiceComb的核心能力实现微服务快速开发、部署、上线等精彩内容。</p>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/8.meeting.jpg" alt="1" /></p>
+
+<p>会后，同学们踊跃发言，与讲师就开源、微服务、个人职业发展等问题进行了开放式的交流，收获满满~</p>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/9.meeting.jpg" alt="1" /></p>
+
+<p><img src="/assets/images/colleges_and_universities/BUPT/10.meeting.jpg" alt="1" /></p>
+
+<p><strong>关于Apache ServiceComb 项目</strong>：</p>
+
+<p>ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。</p>
+
+<hr />
+<p><strong>如您对开源开发、微服务感兴趣，欢迎微信扫码添加“ServiceComb小助手”，咱们一起做点有意思的事情</strong></p>
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content/cn/docs/quick-start-advance/distributed-tracing/index.html

diff --git a/content/cn/docs/quick-start-advance/distributed-tracing/index.html b/content/cn/docs/quick-start-advance/distributed-tracing/index.html
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@@ -0,0 +1,772 @@
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+    <meta itemprop="headline" content="分布式调用链追踪">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb提供的分布式追踪能力">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">分布式调用链追踪
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#前言" id="markdown-toc-前言">前言</a></li>
+  <li><a href="#启用" id="markdown-toc-启用">启用</a></li>
+  <li><a href="#验证" id="markdown-toc-验证">验证</a></li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>分布式调用链追踪用于有效地监控微服务的网络延时并可视化微服务中的数据流转。本指南将展示如何在 <em>体质指数</em> 应用中使用 <strong>ServiceComb</strong> 提供的分布式调用链追踪能力。</p>
+
+<h2 id="前言">前言</h2>
+
+<p>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/quick-start-bmi/">微服务应用快速开发指南</a>，并已成功运行体质指数微服务。</p>
+
+<h2 id="启用">启用</h2>
+
+<ol>
+  <li>
+    <p>在 <em>体质指数计算器</em> 的 <code class="highlighter-rouge">pom.xml</code> 文件中添加依赖项：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在 <em>体质指数计算器</em> 的 <code class="highlighter-rouge">microservice.yaml</code> 文件中添加分布式追踪的处理链：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在 <em>体质指数界面</em> 的 <code class="highlighter-rouge">pom.xml</code> 文件中添加依赖项：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>体质指数应用中已配置好了上述配置项，您只需执行以下几步即可：</p>
+
+<ol>
+  <li>
+    <p>使用 Docker 运行 <em>Zipkin</em> 分布式追踪服务：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 9411:9411 openzipkin/zipkin
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>重启 <em>体质指数计算器</em> 微服务：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=tracing-provider"</span>
+</code></pre></div>    </div>
+    <p>or</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+ mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=tracing-provider"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>重启 <em>体质指数界面</em> 微服务：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dservicecomb.tracing.enabled=true"</span>
+</code></pre></div>    </div>
+    <p>or</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dservicecomb.tracing.enabled=true"</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="验证">验证</h2>
+
+<ol>
+  <li>
+    <p>访问 <a>http://localhost:8889</a> ，在身高和体重栏处输入正数，并点击 <em>Submit</em> 按钮。</p>
+  </li>
+  <li>
+    <p>访问 <a>http://localhost:9411</a> ，查看分布式调用追踪情况，可得下方界面。</p>
+  </li>
+</ol>
+
+<p><img src="/assets/images/distributed-tracing-result.png" alt="分布式追踪效果" class="align-center" /></p>
+
+<h2 id="下一步">下一步</h2>
+
+<ul>
+  <li>
+    <p>了解更多<a href="/cn/users/distributed-tracing/">分布式调用链追踪</a></p>
+  </li>
+  <li>
+    <p>阅读<a href="/cn/docs/tracing-with-servicecomb/">基于 ServiceComb 和 Zipkin 的分布式调用链追踪</a>来进一步了解分布式追踪</p>
+  </li>
+  <li>
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content/cn/docs/quick-start-advance/flow-control/index.html

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new file mode 100644
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+    <meta itemprop="headline" content="流量控制">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb框架提供的流量控制能力">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">流量控制
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#前言" id="markdown-toc-前言">前言</a></li>
+  <li><a href="#开启" id="markdown-toc-开启">开启</a></li>
+  <li><a href="#验证" id="markdown-toc-验证">验证</a></li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>流量控制机制通过控制数据传输速率来避免微服务过载运行。本指南将展示如何在 <em>体质指数</em> 应用中使用 <strong>ServiceComb</strong> 提供的流量控制能力。</p>
+
+<h2 id="前言">前言</h2>
+
+<p>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/quick-start-bmi/">微服务应用快速开发指南</a>，并已成功运行体质指数微服务。</p>
+
+<h2 id="开启">开启</h2>
+
+<ol>
+  <li>
+    <p>在 <em>体质指数计算器</em> 的 <code class="highlighter-rouge">pom.xml</code> 文件中添加依赖项：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>handler-flowcontrol-qps<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在 <em>体质指数计算器</em> 的 <code class="highlighter-rouge">microservice.yaml</code> 文件中指明使用流量控制的处理链及指定流控策略：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-provider</span>
+  <span class="na">flowcontrol</span><span class="pi">:</span>
+    <span class="na">Provider</span><span class="pi">:</span>
+      <span class="na">qps</span><span class="pi">:</span>
+        <span class="na">limit</span><span class="pi">:</span>
+          <span class="na">gateway</span><span class="pi">:</span> <span class="m">1</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>体质指数应用中已配置好了上述配置项，您只需关闭之前运行的 <strong>体质指数计算器</strong>，然后再用以下指令重新运行即可：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=qps-flowcontrol-provider -Dcse.flowcontrol.Provider.qps.limit.gateway=1"</span>
+</code></pre></div></div>
+<p>or</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=qps-flowcontrol-provider -Dcse.flowcontrol.Provider.qps.limit.gateway=1"</span>
+</code></pre></div></div>
+
+<h2 id="验证">验证</h2>
+
+<p>访问 <a>http://localhost:8889</a>，在身高和体重的输入框中输入正数，尝试在1秒内多次点击 <em>Submit</em> 按钮，此时就能看到网页由左侧的正常的界面变成了右侧提示由于流控受限而请求被拒的界面。</p>
+
+<p><img src="/assets/images/flow-control-result.png" alt="流量控制效果图" class="align-center" /></p>
+
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+
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+    <p>阅读<a href="/cn/docs/quick-start-advance/service-management/">服务治理快速入门</a></p>
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+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb的处理链能力">
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">微服务开发进阶
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>本指南将带您进入<strong>体质指数</strong>微服务应用开发的进阶之旅。在此旅程，您将能学到 <strong>ServiceComb</strong> 框架如何通过处理链保证微服务的可靠性：</p>
+
+<ul>
+  <li>
+    <p><a href="/cn/docs/quick-start-advance/load-balance/">负载均衡</a>。均衡地将请求分发至多个服务实例中处理。</p>
+  </li>
+  <li>
+    <p><a href="/cn/docs/quick-start-advance/flow-control/">流量控制</a>。限制单位时间内访问某个微服务的请求数量。</p>
+  </li>
+  <li>
+    <p><a href="/cn/docs/quick-start-advance/service-management/">服务治理</a>。在微服务应用中隔离异常服务并阻止异常传递。</p>
+  </li>
+  <li>
+    <p><a href="/cn/docs/quick-start-advance/distributed-tracing">分布式追踪</a>。可视化微服务间的数据流转。</p>
+  </li>
+</ul>
+
+<h2 id="下一步">下一步</h2>
+
+<ul>
+  <li>
+    <p>认识 <a href="/cn/users/"><strong>ServiceComb</strong> 微服务开发框架</a></p>
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+    <meta itemprop="headline" content="负载均衡">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb框架提供的负载均衡能力">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">负载均衡
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#前言" id="markdown-toc-前言">前言</a></li>
+  <li><a href="#开启" id="markdown-toc-开启">开启</a></li>
+  <li><a href="#验证" id="markdown-toc-验证">验证</a></li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>当对体质指数计算器进行水平扩展时，需要将请求均衡地分发到多个体质指数计算器上。本指南将展示如何在 <em>体质指数</em> 应用中使用 <strong>ServiceComb</strong> 提供的负载均衡能力。</p>
+
+<h2 id="前言">前言</h2>
+
+<p>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/quick-start-bmi/">微服务应用快速开发指南</a>，并已成功运行体质指数微服务。</p>
+
+<h2 id="开启">开启</h2>
+
+<p>默认情况下会使用内置的一个简单的负载均衡的实现，不需要额外的配置。</p>
+
+<h2 id="验证">验证</h2>
+
+<p>对 <em>体质指数计算器</em> 微服务进行水平扩展，使其运行实例数为2，即新增一个运行实例：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.rest.address=0.0.0.0:7778"</span>
+</code></pre></div></div>
+<p>or</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.rest.address=0.0.0.0:7778"</span>
+</code></pre></div></div>
+
+<p>为了便于区分不同的运行实例，在体质指数计算器的实现中新增了返回实例ID和运行时间的接口，详情可查看<a href="https://github.com/apache/servicecomb-java-chassis/tree/master/samples/bmi/calculator">体质指数计算器的完整实现代码</a>。而为了避免端口冲突，新的实例在另一个端口上运行。</p>
+
+<p>此时点击 <em>Submit</em> 按钮就可以看到如下两个界面中的实例ID交替出现。</p>
+
+<p><img src="/assets/images/load-balance-result.png" alt="负载均衡效果" class="align-center" /></p>
+
+<h2 id="下一步">下一步</h2>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="服务治理">
+    <meta itemprop="description" content="介绍如何在体质指数应用中使用ServiceComb提供的服务治理能力">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务治理
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#前言" id="markdown-toc-前言">前言</a></li>
+  <li><a href="#启用" id="markdown-toc-启用">启用</a></li>
+  <li><a href="#验证" id="markdown-toc-验证">验证</a></li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>服务治理主要用于解决或缓解服务雪崩的情况，即个别微服务表现异常时，系统能对其进行容错处理，从而避免资源的耗尽。本指南将会展示如何在 <em>体质指数</em> 应用中使用 <strong>ServiceComb</strong> 提供的服务治理能力。</p>
+
+<h2 id="前言">前言</h2>
+
+<p>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/quick-start-bmi/">微服务应用快速开发指南</a>，并已成功运行体质指数微服务。</p>
+
+<h2 id="启用">启用</h2>
+
+<ol>
+  <li>
+    <p>在 <em>体质指数计算器</em> 的 <code class="highlighter-rouge">pom.xml</code> 文件中添加依赖项：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>handler-bizkeeper<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在 <em>体质指数计算器</em> 的 <code class="highlighter-rouge">microservice.yaml</code> 文件中指明使用服务治理的处理链及指定熔断和容错策略：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+  <span class="na">circuitBreaker</span><span class="pi">:</span>
+    <span class="na">Provider</span><span class="pi">:</span>
+      <span class="na">calculator</span><span class="pi">:</span>
+        <span class="na">requestVolumeThreshold</span><span class="pi">:</span> <span class="m">3</span>
+  <span class="na">fallbackpolicy</span><span class="pi">:</span>
+    <span class="na">Provider</span><span class="pi">:</span>
+      <span class="na">policy</span><span class="pi">:</span> <span class="s">returnnull</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>体质指数应用中已配置好了上述配置项，您只需重新运行 <strong>体质指数计算器</strong>：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=bizkeeper-provider -Dcse.circuitBreaker.Provider.calculator.requestVolumeThreshold=3 -Dcse.fallbackpolicy.Provider.policy=returnnull"</span>
+</code></pre></div></div>
+<p>or</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=bizkeeper-provider -Dcse.circuitBreaker.Provider.calculator.requestVolumeThreshold=3 -Dcse.fallbackpolicy.Provider.policy=returnnull"</span>
+</code></pre></div></div>
+
+<h2 id="验证">验证</h2>
+
+<ol>
+  <li>
+    <p>使服务进入熔断状态。访问 <a>http://localhost:8889</a>，在身高或体重的输入框中输入一个负数，连续点击三次或以上 <em>Submit</em> 按钮，此时在网页下方能看到类似左图的界面。</p>
+  </li>
+  <li>
+    <p>验证服务处于熔断状态。在身高和体重的输入框中输入正数，再次点击 <em>Submit</em> 按钮，此时看到的界面依然是类似左图的界面。同时在 <em>体质指数计算器</em> 运行日志也能看到调用不再抛出异常，而是出现类似 <code class="highlighter-rouge">fallback called</code> 的日志。</p>
+  </li>
+  <li>
+    <p>验证服务恢复正常。约15秒后，在身高和体重的输入框中输入正数，点击 <em>Submit</em> 按钮，此时界面显示正常。</p>
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#前言" id="markdown-toc-前言">前言</a></li>
+  <li><a href="#快速开发微服务应用" id="markdown-toc-快速开发微服务应用">快速开发微服务应用</a>    <ul>
+      <li><a href="#体质指数计算器实现" id="markdown-toc-体质指数计算器实现">体质指数计算器实现</a></li>
+      <li><a href="#体质指数界面实现" id="markdown-toc-体质指数界面实现">体质指数界面实现</a></li>
+    </ul>
+  </li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="前言">前言</h2>
+<p>在您进一步阅读之前，请确保您已阅读了<a href="/cn/docs/quick-start/">快速入门指南</a>，并已成功运行<strong>体质指数</strong>微服务。接下来将进入<strong>体质指数</strong>微服务应用的开发之旅。</p>
+
+<h2 id="快速开发微服务应用">快速开发微服务应用</h2>
+<p>在<a href="/cn/docs/quick-start/">快速入门指南</a>中已对<strong>体质指数</strong>微服务的架构进行了说明，其主要由两个微服务组成：</p>
+
+<ul>
+  <li>
+    <p><strong>体质指数计算器</strong>：负责处理运算事务。</p>
+  </li>
+  <li>
+    <p><strong>体质指数界面</strong>：提供用户界面及网关服务。</p>
+  </li>
+</ul>
+
+<p>在开始前，需要先在服务的父工程中添加以下依赖项：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="o">&lt;</span><span class="n">dependencyManagement</span><span class="o">&gt;</span>
+    <span class="o">&lt;</span><span class="n">dependencies</span><span class="o">&gt;</span>
+      <span class="o">&lt;</span><span class="n">dependency</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">groupId</span><span class="o">&gt;</span><span class="n">org</span><span class="o">.</span><span class="na">apache</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">&lt;/</span><span class="n">groupId</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">artifactId</span><span class="o">&gt;</span><span class="n">java</span><span class="o">-</span><span class="n">chassis</span><span class="o">-</span><span class="n">dependencies</span><span class="o">&lt;/</span><span class="n">artifactId</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">version</span><span class="o">&gt;</span><span class="mf">1.0</span><span class="o">.</span><span class="mi">0</span><span class="o">-</span><span class="n">m1</span><span class="o">&lt;/</span><span class="n">version</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">type</span><span class="o">&gt;</span><span class="n">pom</span><span class="o">&lt;/</span><span class="n">type</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">scope</span><span class="o">&gt;</span><span class="kn">import</span><span class="err">&lt;/</span><span class="nn">scope</span><span class="o">&gt;</span>
+      <span class="o">&lt;/</span><span class="n">dependency</span><span class="o">&gt;</span>
+    <span class="o">&lt;/</span><span class="n">dependencies</span><span class="o">&gt;</span>
+  <span class="o">&lt;/</span><span class="n">dependencyManagement</span><span class="o">&gt;</span>
+
+  <span class="o">&lt;</span><span class="n">dependencies</span><span class="o">&gt;</span>
+    <span class="o">&lt;</span><span class="n">dependency</span><span class="o">&gt;</span>
+      <span class="o">&lt;</span><span class="n">groupId</span><span class="o">&gt;</span><span class="n">org</span><span class="o">.</span><span class="na">hibernate</span><span class="o">&lt;/</span><span class="n">groupId</span><span class="o">&gt;</span>
+      <span class="o">&lt;</span><span class="n">artifactId</span><span class="o">&gt;</span><span class="n">hibernate</span><span class="o">-</span><span class="n">validator</span><span class="o">&lt;/</span><span class="n">artifactId</span><span class="o">&gt;</span>
+    <span class="o">&lt;/</span><span class="n">dependency</span><span class="o">&gt;</span>
+  <span class="o">&lt;/</span><span class="n">dependencies</span><span class="o">&gt;</span>
+</code></pre></div></div>
+<p><strong>注意</strong>: <code class="highlighter-rouge">java-chassis-dependencies</code> 这个依赖是以pom的形式导入来统一项目中的依赖项的版本管理。</p>
+
+<p>下面将对这两个微服务的实现进行介绍，其代码已托管于<a href="https://github.com/apache/servicecomb-java-chassis/tree/master/samples/bmi">github</a>上。</p>
+<h3 id="体质指数计算器实现">体质指数计算器实现</h3>
+<p>体质指数计算器提供运算服务，其实现分为三部分：</p>
+
+<ul>
+  <li>
+    <p>具体运算实现</p>
+  </li>
+  <li>
+    <p>服务端点定义</p>
+  </li>
+  <li>
+    <p>服务启动入口</p>
+  </li>
+</ul>
+
+<h4 id="具体运算实现">具体运算实现</h4>
+<p>本模块负责计算体质指数，根据公式 \(体质指数=\frac{体重}{身高^2}\) 进行实现，代码如下：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">CalculatorService</span> <span class="o">{</span>
+  <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="nd">@Service</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorServiceImpl</span> <span class="kd">implements</span> <span class="nc">CalculatorService</span> <span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">height</span> <span class="o">&lt;=</span> <span class="mi">0</span> <span class="o">||</span> <span class="n">weight</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Arguments must be above 0"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="kt">double</span> <span class="n">heightInMeter</span> <span class="o">=</span> <span class="n">height</span> <span class="o">/</span> <span class="mi">100</span><span class="o">;</span>
+    <span class="k">return</span> <span class="n">weight</span> <span class="o">/</span> <span class="o">(</span><span class="n">heightInMeter</span> <span class="o">*</span> <span class="n">heightInMeter</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h4 id="服务端点定义">服务端点定义</h4>
+<p>服务端点用于生成服务契约，使得服务间能无缝进行通信。首先定义端点接口：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">CalculatorEndpoint</span> <span class="o">{</span>
+  <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+<p>引入 <strong>ServiceComb</strong> 依赖：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>暴露运算服务的Restful端点：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"calculatorRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorRestEndpoint</span> <span class="kd">implements</span> <span class="nc">CalculatorEndpoint</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">CalculatorService</span> <span class="n">calculatorService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="kd">public</span> <span class="nf">CalculatorRestEndpoint</span><span class="o">(</span><span class="nc">CalculatorService</span> <span class="n">calculatorService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">calculatorService</span> <span class="o">=</span> <span class="n">calculatorService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@GetMapping</span><span class="o">(</span><span class="s">"/bmi"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">calculatorService</span><span class="o">.</span><span class="na">calculate</span><span class="o">(</span><span class="n">height</span><span class="o">,</span> <span class="n">weight</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p class="notice--info">ServiceComb从0.3.0版本之后提供了对SpringMvc中简化注解(即<code class="highlighter-rouge">GetMapping</code>等)的支持。</p>
+
+<p>这里用<code class="highlighter-rouge">@RestSchema</code>注释端点后， <strong>ServiceComb</strong> 微服务框架会自动生成对应的服务端点契约，并根据
+如下的 <code class="highlighter-rouge">microservice.yaml</code> 文件中的定义来配置端点端口，将契约和服务一起注册到服务注册中心。</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">bmi</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">calculator</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7777</span>
+</code></pre></div></div>
+
+<h4 id="服务启动入口">服务启动入口</h4>
+<p>服务启动入口中只需添加 <code class="highlighter-rouge">@EnableServiceComb</code> 的注解即可启用 <em>ServiceComb</em> 微服务框架，代码如下：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">CalculatorApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="体质指数界面实现">体质指数界面实现</h3>
+<p>本模块负责提供用户界面及网关服务。其实现主要分为三部分：</p>
+
+<ul>
+  <li>
+    <p>前端界面</p>
+  </li>
+  <li>
+    <p>网关及路由规则</p>
+  </li>
+  <li>
+    <p>服务启动入口</p>
+  </li>
+</ul>
+
+<p>其中，前端界面的组件使用了<a href="http://getbootstrap.com/">Bootstrap</a>来开发。</p>
+
+<h4 id="网关及路由规则">网关及路由规则</h4>
+<p>网关服务主要用到了业界有名的<a href="https://github.com/Netflix/zuul/wiki">Netflix Zuul</a>来实现。</p>
+
+<p>引入依赖：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-servicecomb<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p class="notice--info">ServiceComb从0.4.0-SNAPSHOT版本之后新增了<code class="highlighter-rouge">spring-cloud-zuul</code>模块使能提供对zuul的兼容。</p>
+
+<p>在 <code class="highlighter-rouge">application.yaml</code> 文件中配置路由规则及服务端口信息：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">zuul</span><span class="pi">:</span>
+  <span class="na">routes</span><span class="pi">:</span>
+    <span class="na">calculator</span><span class="pi">:</span> <span class="s">/calculator/**</span>
+
+<span class="c1"># disable netflix eureka since it's not used for service discovery</span>
+<span class="na">ribbon</span><span class="pi">:</span>
+  <span class="na">eureka</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">false</span>
+
+<span class="na">server</span><span class="pi">:</span>
+  <span class="na">port</span><span class="pi">:</span> <span class="m">8889</span>
+</code></pre></div></div>
+<p>在 <code class="highlighter-rouge">microservice.yaml</code> 文件中配置网关服务的信息和服务注册中心的地址。</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">bmi</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">gateway</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+</code></pre></div></div>
+<p>此处将服务注册中心和Zuul相结合使其能发现服务。</p>
+
+<h4 id="服务启动入口-1">服务启动入口</h4>
+<p>服务启动入口也只需要声明启用 <code class="highlighter-rouge">ServiceComb</code> 和 <code class="highlighter-rouge">Zuul</code> 即可。</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableZuulProxy</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">GatewayApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">GatewayApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>至此，<strong>体质指数</strong>应用已开发完毕，您可以通过<a href="/cn/docs/quick-start/#运行微服务应用">快速入门指南</a>中的步骤对其进行验证。</p>
+
+<h2 id="下一步">下一步</h2>
+
+<ul>
+  <li>阅读 <a href="/cn/docs/quick-start-advance/">微服务开发进阶</a></li>
+</ul>
+
+        
+      </section>
+
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+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_docs/cn/quick-start-bmi.md">在Github上编辑此页</a></li>
+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
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+    <meta itemprop="headline" content="数据一致性解决方案">
+    <meta itemprop="description" content="介绍ServiceComb的Saga数据一致性方案应用demo">
+    
+    <meta itemprop="dateModified" content="September 19, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">数据一致性解决方案
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#运行demo" id="markdown-toc-运行demo">运行demo</a></li>
+  <li><a href="#验证" id="markdown-toc-验证">验证</a></li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>模拟一个简单的旅行应用，展示如何使用ServiceComb提供的Saga方案保证微服务间数据一致性。</p>
+
+<p>旅行应用包含四个微服务：</p>
+<ul>
+  <li>机票预订服务(flight-booking-service)</li>
+  <li>租车服务(car-rental-service)</li>
+  <li>酒店预订服务(hotel-reservation-service)</li>
+  <li>支付服务(payment-service)</li>
+</ul>
+
+<p>机票预订、租车、酒店预订服务间无依赖关系，使用自己的数据库，通过HTTP协议通信。
+在以上三个服务的预订成功，支付完成后才能满足一个成功的行程，否则不能成行，Saga自动补偿。</p>
+
+<p><img src="/assets/images/saga-demo.png" alt="Saga-demo" /></p>
+
+<h2 id="运行demo">运行demo</h2>
+
+<p>注：Demo 集成在 <a href="https://github.com/apache/servicecomb-saga">ServiceComb-Saga</a> 项目中。</p>
+
+<ol>
+  <li>准备环境
+    <ul>
+      <li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">Oracle JDK 1.8</a></li>
+      <li><a href="https://maven.apache.org/install.html">Maven 3.x</a></li>
+      <li><a href="https://www.docker.com/get-docker">Docker</a></li>
+      <li><a href="https://dev.mysql.com/downloads/">MySQL</a></li>
+      <li><a href="https://github.com/apache/servicecomb-service-center">Service Center</a></li>
+      <li><a href="https://docs.docker.com/compose/install/">Docker compose</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>配置服务
+ 在各服务的 <em>microservice.yaml</em> 文件，设置该服务注册的服务中心</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">saga</span>
+ <span class="na">service_description</span><span class="pi">:</span>
+   <span class="na">name</span><span class="pi">:</span> <span class="s">flight-booking-service</span>
+   <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+ <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span> <span class="c1">#此处选择使用ServiceComb的Service Center</span>
+   <span class="na">rest</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+   <span class="na">handler</span><span class="pi">:</span>
+     <span class="na">chain</span><span class="pi">:</span>
+       <span class="na">Consumer</span><span class="pi">:</span>
+         <span class="na">default</span><span class="pi">:</span> <span class="s">loadbalance</span>
+</code></pre></div>    </div>
+
+    <p>在 <em>saga-demo/docker-compose.yaml</em> 设置部署脚本</p>
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">version</span><span class="pi">:</span> <span class="s1">'</span><span class="s">2.1'</span>
+
+ <span class="na">services</span><span class="pi">:</span>
+   <span class="na">service-center</span><span class="pi">:</span> <span class="c1">#此处选择使用ServiceComb的Service Center容器镜像</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">servicecomb/service-center"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">service-center</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">30100:30100"</span>
+
+   <span class="na">mysql</span><span class="pi">:</span>  <span class="c1">#此处选择使用5.7版本的mysql镜像</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">mysql/mysql-server:5.7"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">mysql</span>
+     <span class="na">environment</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s">MYSQL_ROOT_PASSWORD=password</span>
+       <span class="pi">-</span> <span class="s">MYSQL_DATABASE=saga</span>
+       <span class="pi">-</span> <span class="s">MYSQL_USER=saga</span>
+       <span class="pi">-</span> <span class="s">MYSQL_PASSWORD=password</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">3306:3306"</span>
+     <span class="na">healthcheck</span><span class="pi">:</span>
+         <span class="na">test</span><span class="pi">:</span> <span class="pi">[</span><span class="s2">"</span><span class="s">CMD-SHELL"</span><span class="pi">,</span> <span class="s2">"</span><span class="s">nc</span><span class="nv"> </span><span class="s">-z</span><span class="nv"> </span><span class="s">localhost</span><span class="nv"> </span><span class="s">3306</span><span class="nv"> </span><span class="s">&amp;&gt;</span><span class="nv"> </span><span class="s">/dev/null;</span><span class="nv"> </span><span class="s">echo</span><span class="nv"> </span><span class="s">$$?"</span><span class="pi">]</span>
+         <span class="na">interval</span><span class="pi">:</span> <span class="s">30s</span>
+         <span class="na">timeout</span><span class="pi">:</span> <span class="s">10s</span>
+         <span class="na">retries</span><span class="pi">:</span> <span class="m">5</span>
+
+   <span class="na">car-rental-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">car-rental-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">car</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8080:8080"</span>
+
+   <span class="na">flight-booking-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">flight-booking-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">flight</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8081:8080"</span>
+
+   <span class="na">hotel-reservation-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">hotel-reservation-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">hotel</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8082:8080"</span>
+
+   <span class="na">payment-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">payment-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">payment</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8080"</span>
+
+   <span class="na">saga</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">saga-spring:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">saga</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">mysql:mysql.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">car-rental-service:car.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">flight-booking-service:flight.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">hotel-reservation-service:hotel.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">payment-service:payment.servicecomb.io"</span>
+     <span class="na">environment</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s">JAVA_OPTS=-Dspring.profiles.active=prd,servicecomb -Dcse.service.registry.address=http://sc.servicecomb.io:30100</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8083:8080"</span>
+     <span class="na">depends_on</span><span class="pi">:</span>
+       <span class="na">mysql</span><span class="pi">:</span>
+         <span class="na">condition</span><span class="pi">:</span> <span class="s">service_healthy</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在Saga项目的根目录执行编译，制作Saga、机票预订、租车、酒店预订和支付服务镜像</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> mvn package <span class="nt">-DskipTests</span> <span class="nt">-Pdocker</span> <span class="nt">-Pdemo</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在Saga项目的saga-demo目录通过docker-compose一键启动Saga、机票预订、租车、酒店预订和支付服务</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> docker-compose up
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="验证">验证</h2>
+
+<ol>
+  <li>
+    <p>参照 <a href="https://github.com/apache/servicecomb-saga/blob/master/docs/api/api.md">Saga API</a> 说明，设定各服务的事务、补偿、依赖和恢复参数，并保存为 <em>request.json</em> 文件</p>
+
+    <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="w"> </span><span class="p">{</span><span class="w">
+   </span><span class="nl">"policy"</span><span class="p">:</span><span class="w"> </span><span class="s2">"BackwardRecovery"</span><span class="p">,</span><span class="w">
+   </span><span class="nl">"requests"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-car"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"car-rental-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/rentals"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/rentals"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">},</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-hotel"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"hotel-reservation-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/reservations"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/reservations"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">},</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-flight"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"flight-booking-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/bookings"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/bookings"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">},</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-payment"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"payment-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"parents"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+         </span><span class="s2">"request-car"</span><span class="p">,</span><span class="w">
+         </span><span class="s2">"request-flight"</span><span class="p">,</span><span class="w">
+         </span><span class="s2">"request-hotel"</span><span class="w">
+       </span><span class="p">],</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/payments"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/payments"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">}</span><span class="w">
+   </span><span class="p">]</span><span class="w">
+ </span><span class="p">}</span><span class="w">
+</span></code></pre></div>    </div>
+  </li>
+  <li>
+    <p>发送请求到Saga</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> curl <span class="nt">-XPOST</span> <span class="nt">-H</span> <span class="s2">"Content-Type: text/plain"</span> <span class="nt">-d</span> @./request.json  http://&lt;localhost.ip:8083&gt;/requests
+</code></pre></div>    </div>
+
+    <p>获取处理结果成功(如果失败，返回相应的错误信息)</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> success
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>查看Saga的事务</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> curl <span class="nt">-XGET</span> http://&lt;localhost.ip:8083&gt;/events
+</code></pre></div>    </div>
+
+    <p>查询结果</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o">{</span>
+     <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>: <span class="o">[</span>
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 1,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">policy</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">BackwardRecovery</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">requests</span><span class="se">\"</span><span class="s2">: [{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}]}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 2,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 3,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 4,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 5,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:22Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Flight booked with id f249543b-765e-4e10-9ba3-74fe33d8af83 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 6,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:24Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Hotel reserved with id f74049a0-3d3d-49b6-a45b-058a409daecf for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 7,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Car rented with id 937d7364-be07-4d47-9e01-af72290d0478 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 8,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 9,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Payment made for customer mike and remaining balance is 200</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 10,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{}"</span>
+         <span class="o">}</span>
+ 	<span class="o">]</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>demo中模拟了支付服务帐户余额不足场景，发送请求超过一次将触发补偿操作。再次发送请求，可以在Saga日志中找到补偿事件</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o">{</span>
+     <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>: <span class="o">[</span>
+         ...
+     <span class="o">]</span>,
+     <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>: <span class="o">[</span>
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 11,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">policy</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">BackwardRecovery</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">requests</span><span class="se">\"</span><span class="s2">: [{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}]}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 12,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 13,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 14,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 15,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Car rented with id 75f4be4b-0d32-4bbb-b786-7b39c340682a for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 16,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Hotel reserved with id 7ad11c00-25eb-4b4b-b1fb-b55d4e833f51 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 17,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Flight booked with id 1a40d7bf-ee66-46d1-b066-a9973f15176a for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 18,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 19,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionAbortedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">body</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">org.apache.servicecomb.saga.core.TransactionFailedException: The remote service payment-service failed to serve the post request to /payments </span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.discovery.service.center.ServiceCenterDiscoveryRestTransport.with(ServiceCenterDiscoveryRestTransport.java:81)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.format.JacksonRestOperation.send(JacksonRestOperation.java:43)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.format.JacksonRestTransaction.send(JacksonRestTransaction.java:24)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.RequestProcessTask.commit(RequestProcessTask.java:45)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.BackwardRecovery.apply(BackwardRecovery.java:33)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.LoggingRecoveryPolicy.apply(LoggingRecoveryPolicy.java:38)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.TransactionTaskConsumer</span><span class="nv">$OperationCallable</span><span class="s2">.call(TransactionTaskConsumer.java:110)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.TransactionTaskConsumer</span><span class="nv">$OperationCallable</span><span class="s2">.call(TransactionTaskConsumer.java:94)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.FutureTask.run(FutureTask.java:266)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.Executors</span><span class="nv">$RunnableAdapter</span><span class="s2">.call(Executors.java:511)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.FutureTask.run(FutureTask.java:266)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.ThreadPoolExecutor</span><span class="nv">$Worker</span><span class="s2">.run(ThreadPoolExecutor.java:617)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.lang.Thread.run(Thread.java:748)</span><span class="se">\\</span><span class="s2">nCaused by: InvocationException: code=490;msg=CommonExceptionData [message=Cse Internal Bad Request]</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.exception.ExceptionFactory.doCreate(ExceptionFactory.java:74)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.exception.ExceptionFactory.convertException(ExceptionFactory.java:119)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.exception.ExceptionFactory.convertConsumerException(ExceptionFactory.java:78)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.Response.createConsumerFail(Response.java:128)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.Response.createFail(Response.java:121)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.AsyncResponse.fail(AsyncResponse.java:41)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.transport.rest.client.http.VertxHttpMethod.lambda</span><span class="nv">$doMethod$0</span><span class="s2">(VertxHttpMethod.java:67)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.handleException(HttpClientRequestBase.java:110)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestImpl.handleException(HttpClientRequestImpl.java:50)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.timeout(HttpClientRequestBase.java:155)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.handleTimeout(HttpClientRequestBase.java:140)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.lambda</span><span class="nv">$setTimeout$0</span><span class="s2">(HttpClientRequestBase.java:100)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.impl.VertxImpl</span><span class="nv">$InternalTimerHandler</span><span class="s2">.handle(VertxImpl.java:782)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.impl.VertxImpl</span><span class="nv">$InternalTimerHandler</span><span class="s2">.handle(VertxImpl.java:753)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.impl.ContextImpl.lambda</span><span class="nv">$wrapTask$2</span><span class="s2">(ContextImpl.java:316)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:418)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:440)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.util.concurrent.SingleThreadEventExecutor</span><span class="nv">$5</span><span class="s2">.run(SingleThreadEventExecutor.java:873)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">t... 1 more</span><span class="se">\\</span><span class="s2">nCaused by: java.util.concurrent.TimeoutException: The timeout period of 30000ms has been exceeded</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">t... 11 more</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 20,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionCompensatedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Car rental cancelled with id 38bc5913-6768-4321-add3-6d26db364c19 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 21,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionCompensatedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Hotel reservation cancelled with id efcff718-fb74-4b70-a2e2-689ecb42206d for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 22,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionCompensatedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Flight booking cancelled with id 37572464-6f53-4351-aa37-5f88e3f1f872 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 23,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{}"</span>
+         <span class="o">}</span>
+     <span class="o">]</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="下一步">下一步</h2>
+
+<ul>
+  <li>
+    <p>了解更多<a href="/cn/docs/distributed_saga_1/">ServiceComb中的数据最终一致性方案 - part 1</a></p>
+  </li>
+  <li>
+    <p>了解更多<a href="/cn/docs/distributed_saga_2/">ServiceComb中的数据最终一致性方案 - part 2</a></p>
+  </li>
+  <li>
+    <p>了解更多<a href="/cn/docs/distributed_saga_3/">ServiceComb中的数据最终一致性方案 - part 3</a></p>
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+
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+      
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+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#安装-java-开发环境" id="markdown-toc-安装-java-开发环境">安装 Java 开发环境</a></li>
+  <li><a href="#运行-service-center" id="markdown-toc-运行-service-center">运行 Service Center</a></li>
+  <li><a href="#创建第一个微服务" id="markdown-toc-创建第一个微服务">创建第一个微服务</a></li>
+  <li><a href="#运行微服务应用" id="markdown-toc-运行微服务应用">运行微服务应用</a></li>
+  <li><a href="#下一步" id="markdown-toc-下一步">下一步</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="安装-java-开发环境">安装 Java 开发环境</h2>
+
+<ul>
+  <li>
+    <p>安装<strong>git</strong>，详情可参考<a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git" target="_blank">git安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装JDK 1.8，详情可参考<a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">JDK安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装Maven 3.x，详情可参考<a href="https://maven.apache.org/install.html" target="_blank">Maven安装教程</a>。</p>
+  </li>
+  <li>
+    <p>下载ServiceComb-Sample</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> git clone https://github.com/apache/servicecomb-samples.git
+ <span class="nb">cd </span>servicecomb-samples/java-chassis-samples/bmi
+ mvn clean <span class="nb">install</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="运行-service-center">运行 Service Center</h2>
+<p>在 <strong>ServiceComb</strong> 微服务框架中，<strong>Service Center</strong> 提供服务注册及服务发现功能，可直接使用 Docker 运行。</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest
+</code></pre></div></div>
+<p><em>您可以通过阅读<a href="/cn/docs/service-center/install/">环境安装</a>获取在本地以二进制方式运行Service Center的方法。</em></p>
+
+<h2 id="创建第一个微服务">创建第一个微服务</h2>
+<p>本指南将以一个简单的 <strong>体质指数(BMI)</strong> 应用开展微服务之旅。<a href="https://baike.baidu.com/item/%E4%BD%93%E8%B4%A8%E6%8C%87%E6%95%B0" target="_blank">体质指数</a>主要用于衡量人体胖瘦程度。该应用主要包含两个微服务：</p>
+
+<ul>
+  <li>
+    <p><strong>体质指数计算器</strong>：负责处理运算事务。</p>
+  </li>
+  <li>
+    <p><strong>体质指数界面</strong>：提供用户界面及网关服务。</p>
+  </li>
+</ul>
+
+<p>其运行流程为：<br />
+<img src="/assets/images/quick-start-sample-workflow.png" alt="体质指数应用运行流程" class="align-center" /></p>
+
+<p>其中，虚线表示服务注册及服务发现的过程。</p>
+
+<h2 id="运行微服务应用">运行微服务应用</h2>
+
+<ol>
+  <li>
+    <p>进入 <strong>体质指数</strong> 应用代码目录。</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd </span>servicecomb-samples/java-chassis-samples/bmi
+</code></pre></div>    </div>
+    <p><strong>注意</strong>：在windows开发环境下，docker是在虚拟机中启动，因此需要修改微服务的 <strong>Service Center</strong> IP地址为虚拟机IP地址。修改2个配置文件[calculator|webapp]/src/main/resources/microservice.yaml，将其中<a>http://127.0.0.1:30100</a>修改为<a>http://192.168.99.100:30100</a>，其中192.168.99.100是虚拟机IP，需要与开发环境中的虚拟机IP保持一致。</p>
+  </li>
+  <li>
+    <p>启动 <strong>体质指数计算器</strong> 和 <strong>体质指数界面</strong> 微服务，分别执行以下指令：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd </span>calculator<span class="p">;</span> mvn spring-boot:run
+<span class="nb">cd </span>webapp<span class="p">;</span> mvn spring-boot:run
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>验证服务。微服务启动完毕后，即可通过 <a>http://localhost:8889</a> 访问 <strong>体质指数</strong> 应用，届时将能看到如下界面，并可输入您的身高和体重信息验证服务是否正常运行。</p>
+
+    <p><img src="/assets/images/bmi-interface.png" alt="体质指数应用运行界面" class="align-center" /></p>
+  </li>
+</ol>
+
+<h2 id="下一步">下一步</h2>
+
+<ul>
+  <li>阅读<a href="/cn/docs/quick-start-bmi/"><strong>体质指数</strong>微服务应用快速开发</a>。</li>
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+    <meta itemprop="headline" content="[里程碑]Apache ServiceComb 1.0.0版本正式发布">
+    <meta itemprop="description" content="ServieComb版本正式步入稳定态">
+    <meta itemprop="datePublished" content="August 13, 2018">
+    <meta itemprop="dateModified" content="June 14, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">[里程碑]Apache ServiceComb 1.0.0版本正式发布
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>​	近日，正在Apache基金会孵化项目—<strong>微服务解决方案Apache ServiceComb</strong>(incubating) 的1.0.0版本通过社区投票，正式发布。这次发版的项目包括  Apache ServiceComb Java-Chassis （以下简称 <strong>Java-chassis</strong>）以及Apache ServiceComb ServiceCenter (以下简称<strong>ServiceCenter</strong>)。ServiceComb从2017年12月进入Apache基金会孵化至今半年时间内，一步一个脚印，于2018年3月发布1.0.0-m1版本、2018年6月1.0.0-m2发布版本，并于2018年8月完成了1.0.0里程碑版本的发布。当前，已经有10+企业使用了ServiceComb 进行商用，社区参会10+次，举办3场Meetup。本次的1.0.0版本发布，意味着ServiceComb 版本在符合Apache软件基金会要求的前提下，正式进入了稳定态。ServiceComb进入Apache基金会孵化后的主要新增特性及提升如下：</p>
+
+<h2 id="java-chassis">Java-chassis</h2>
+
+<ul>
+  <li>
+    <p>全新的监控指标（Metrics）模块，增加大量监控指标，支持Prometheus集成</p>
+
+    <ul>
+      <li>更多详细内容请参考<a href="http://docs.servicecomb.io/zh_CN/general-development/metrics.html">Metrics介绍</a>和<a href="http://servicecomb.incubator.apache.org/cn/users/metrics-integration-with-prometheus-in-1.0.0-m1/">如何集成Prometheus</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>重构配置中心，支持对接携程Apollo作为配置中心，并且可以方便的扩展对接其它三方配置中心</p>
+
+    <ul>
+      <li>更多详细内容请参考<a href="http://servicecomb.incubator.apache.org/cn/docs/config_center_integration/">配置中心选型与对接</a>；</li>
+    </ul>
+  </li>
+  <li>
+    <p>POJO编程模型支持用户使用CompletableFuture异步编程</p>
+
+    <ul>
+      <li>更新详细内容请参考<a href="http://docs.servicecomb.io/zh_CN/build-consumer/develop-consumer-using-rpc.html">使用透明RPC方式开发服务消费者</a>中“reactive”部分</li>
+    </ul>
+  </li>
+  <li>
+    <p>POJO编程模型支持用户使用Object和Generic类型作为调用参数</p>
+
+    <ul>
+      <li>更多详细内容请参考<a href="http://docs.servicecomb.io/zh_CN/build-provider/interface-constraints.html">接口定义和数据类型</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>升级Zipkin到Zipkin2，同时支持v1和v2版本Zipkin server</p>
+
+    <ul>
+      <li>关于如何在ServiceComb中使用Zipkin请参考<a href="http://servicecomb.incubator.apache.org/cn/docs/tracing-with-servicecomb/">分布式调用链追踪</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>微服务间通讯提供文件流传输能力，支持音乐、图片等多媒体场景</p>
+
+    <ul>
+      <li>如何使用文件流传输请参考<a href="http://docs.servicecomb.io/zh_CN/general-development/file-upload.html">文件上传</a>和<a href="http://docs.servicecomb.io/zh_CN/general-development/file-download.html">文件下载</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>在服务级别QPS控制基础上，新增支持API级别QPS控制；</p>
+
+    <p>现在支持使用<code class="highlighter-rouge">servicecomb.flowcontrol.Consumer.qps.limit.[ServiceName].[Schema].[operation]</code> 配置API级别QPS控制。</p>
+  </li>
+  <li>
+    <p>增加脚手架和start.servicecomb.io，支持用户快速构建工程，提供完整的开箱即用能力；</p>
+
+    <p>现在创建一个ServiceComb微服务可以通过Apache Maven Archetype方式快速构建，更多详细内容请参考<a href="https://github.com/apache/incubator-servicecomb-java-chassis/blob/master/archetypes/README.md">ServiceComb Java Chassis Archetypes</a>，您也可以直接访问<a href="http://start.servicecomb.io/">start.servicecomb.io</a>使用ServiceComb集成SPRING INITIALIZR UI的方式创建；</p>
+  </li>
+  <li>
+    <p>新增演示如何使用Gradle构建ServiceComb项目；</p>
+
+    <ul>
+      <li>我们在<a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/bmi">BMI</a>项目中增加了Gradle配置；</li>
+    </ul>
+  </li>
+  <li>
+    <p>异步编程模型支持<code class="highlighter-rouge">AsycRestTemplate</code>；</p>
+
+    <ul>
+      <li>关于如何使用请参考<a href="http://docs.servicecomb.io/zh_CN/build-consumer/using-AsyncRestTemplate.html">使用AsynRestTemplate开发服务消费者</a>；</li>
+    </ul>
+  </li>
+  <li>
+    <p>新增支持Http2协议；</p>
+
+    <ul>
+      <li>关于如何使用请参考<a href="http://docs.servicecomb.io/zh_CN/build-provider/protocol/http2.html">使用Http2通信</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>实现错误注入接口，允许通过拦截服务请求构造异常场景，例如可以设置发往指定微服务的请求的时延和错误及其触发概率；</p>
+
+    <ul>
+      <li>更多详细内容请参考<a href="http://docs.servicecomb.io/zh_CN/build-consumer/fault-injection.html">故障注入</a>；</li>
+    </ul>
+  </li>
+  <li>
+    <p>新增服务Dev运行模式，开启Dev模式时，支持契约动态修改；</p>
+
+    <ul>
+      <li>如何设置Dev运行模式请参考<a href="http://docs.servicecomb.io/zh_CN/general-development/local-develop-test.html">本地开发和测试</a>中的“通过设置环境信息方便本地调试”部分；</li>
+    </ul>
+  </li>
+  <li>
+    <p>实现优雅停机，关闭服务时进行反注册，确保完成已接受请求并完整释放资源；</p>
+  </li>
+  <li>
+    <p>扩展微服务公私钥认证机制，增加了黑白名单功能；</p>
+
+    <ul>
+      <li>ServiceCenter已经支持通过黑白名单控制微服务的注册发现，但是由于微服务之间最终是直连调用，因此微服务本身也需要有独立的黑白名单认证功能，如何设置请参考<a href="http://docs.servicecomb.io/zh_CN/references-handlers/publickey.html">公钥认证</a>中的“配置黑白名单”部分；</li>
+    </ul>
+  </li>
+  <li>
+    <p>支持Cross-Origin Resource Sharing (CORS)；</p>
+
+    <ul>
+      <li>即支持跨域请求访问设置，例如现在Ajax可以直接访问微服务了，更多详细内容请参考<a href="http://docs.servicecomb.io/zh_CN/general-development/CORS.html">CORS机制</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>扩展了Rest Endpoint的Access Log机制；</p>
+
+    <ul>
+      <li>以前用户只能设置Access Log的Pattern，现在用户可以进一步自定义Access Log Item，更多内容请参考<a href="http://docs.servicecomb.io/zh_CN/build-provider/access-log-configuration.html">Access Log配置</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>SpringMVC编程模型现在同样支持类对象作为参数</p>
+
+    <ul>
+      <li>用户可以使用类对象作为参数，例如：</li>
+    </ul>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/address"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="nc">String</span> <span class="nf">address</span><span class="o">(</span><span class="nc">Address</span> <span class="n">address</span><span class="o">)</span> <span class="o">{</span> <span class="o">...</span> <span class="o">}</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">Address</span> <span class="o">{</span>
+	<span class="nc">String</span> <span class="n">country</span><span class="o">;</span>
+	<span class="nc">String</span> <span class="n">city</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>将会自动转化为<code class="highlighter-rouge">/address?city={city}&amp;country={country}</code></p>
+  </li>
+  <li>
+    <p>部署在Tomcat等Web容器中的微服务，现在支持结合context path和servlet pattern的访问路径请求服务</p>
+
+    <ul>
+      <li>例如调用路径为<code class="highlighter-rouge">cse://service/a/b...</code>，部署在Tomcat等Web容器中后也支持以<code class="highlighter-rouge">cse://service/{context path}/{servlet pattern}/a/b...</code>为URL访问；</li>
+    </ul>
+  </li>
+  <li>
+    <p>缺省自动扫描main函数所在包，简化用户配置</p>
+  </li>
+  <li>
+    <p>提供客户端ping机制，能够通过ping扩展，检测客户端缓存实例是否可用。该功能默认启用，配合实例隔离功能对检测失败的实例进行隔离</p>
+  </li>
+  <li>
+    <p>当微服务发生服务降级，实例隔离熔断等状况时，将触发相应的Event，便于第三方集成（上报）</p>
+
+    <ul>
+      <li>如何获取这类Event请参考<a href="http://docs.servicecomb.io/zh_CN/general-development/AlarmEvent.html">获取熔断与实例隔离告警事件</a>；</li>
+    </ul>
+  </li>
+</ul>
+
+<h2 id="servicecenter">ServiceCenter</h2>
+
+<p><img src="/assets/images/Service-Center-UI-Preview.gif" alt="1" /></p>
+
+<ul>
+  <li>主要新增了如下特性：
+    <ul>
+      <li>PACT Broker共享契约支持</li>
+      <li>支持<code class="highlighter-rouge">AsycRestTemplate</code>异步编程</li>
+      <li>日志分割（Log Rotation）</li>
+      <li>支持IPv6</li>
+      <li>支持后端存储拓展</li>
+      <li>契约测试：支持使用前端对Swagger API进行测试
+        <ul>
+          <li>详情请参考<code class="highlighter-rouge">http://servicecomb.incubator.apache.org/docs/service-center-ui/</code></li>
+        </ul>
+      </li>
+      <li>消费者服务自发现</li>
+    </ul>
+  </li>
+  <li>稳定性提升及bug fix</li>
+  <li>优化API接口，显著提高性能</li>
+  <li>优化Restful 客户端及插件加载器，提升易用性</li>
+  <li>无缝集成metrics 及tracing工具，提升监控能力</li>
+  <li>增加了默认的TLS加密套件，提升基于规则的服务发现的安全性</li>
+  <li>服务依赖管理采用事件驱动机制</li>
+  <li>提升ETCD链接的弹性伸缩能力和自我修复能力</li>
+  <li>Service-Center 支持在多基础设施中部署</li>
+  <li>优化前端界面UI，提供更多功能及提升易用性</li>
+</ul>
+
+<h2 id="下载地址">下载地址：</h2>
+
+<p>Java-chassis:</p>
+
+<p><a href="http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/">http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/</a></p>
+
+<p>Service-Center:</p>
+
+<p><a href="http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/">http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/</a></p>
+
+        
+      </section>
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+</div>
+
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb数据一致性解决方案Saga演进介绍">
+    <meta itemprop="description" content="Saga演进介绍">
+    <meta itemprop="datePublished" content="April 04, 2018">
+    <meta itemprop="dateModified" content="April 04, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb数据一致性解决方案Saga演进介绍
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>传统的单体应用的微服务化改造过程中大多会面临数据库拆分，故而原来由数据库保证的数据一致性也一定面临重新设计和实现，此时需要引入分布式数据一致性方案来解决。常见的解决方案主要有2PC，TCC，事件驱动等，而在微服务开源项目 ServiceComb中提出并实现了使用Saga<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">[1]</a>来解决微服务的数据一致性难题，不同方案的对比可参考《ServiceComb中的数据最终一致性方案》<a href="http://blog.csdn.net/fl63zv9zou86950w/article/details/78393439">[2]</a>一文。Saga是一个数据最终一致性的解决方案，它允许我们成功地执行所有事务，或在任何事务失败的情况下，补偿已成功的事务，并提供了ACID<a href="https://en.wikipedia.org/wiki/ACID">[3]</a>中ACD的保证（由于事务是交错执行的，可能会看到其他事务的部分结果，因此不能满足隔离性要求）。因此，Saga适用于以下跨服务的事务场景：</p>
+
+<ul>
+  <li><strong>嵌套调用</strong>。如网上购物时，会依次经过下单、支付服务和第三方支付这几个子事务，其中，下单依赖于支付服务的返回状态，而支付服务也包含了多种可选的支付方式，并依赖于具体支付方式返回的结果。通过Saga，可以清晰地看到一个完整事务中各个服务之间的关系，在异常时也能快速定位出现问题的子事务。</li>
+  <li><strong>高并发</strong>。如秒杀场景下，在成功扣除库存和完成支付后方可认为秒杀成功，若成功扣除库存但支付失败则自动进行补偿（即恢复库存）。鉴于Saga只有提交和补偿两种状态，成功场景下只需对每个子事务进行一次调用即可，因此可以在高并发下保持高性能。</li>
+  <li><strong>调用时间长</strong>。如线上购买电影票，选好座位后一般会有15分钟的支付时间。Saga仅在子事务的提交阶段对资源进行短暂的锁定，且通过超时机制确保事务超时后能自动补偿，即在规定时间内没有支付成功的话就自动释放锁定的座位，极大地简化了业务出现异常时的处理逻辑。</li>
+</ul>
+
+<h2 id="saga新版本演进">Saga新版本演进</h2>
+
+<p>新年新气象，Apache ServiceComb(incubating) Saga<a href="https://github.com/apache/incubator-servicecomb-saga">[4]</a>（以下简称Saga）进行了演进。相对于上一版<a href="http://blog.csdn.net/fl63zv9zou86950w/article/details/78393439">[2]</a>，新演进的设计主要有以下优势：</p>
+
+<ul>
+  <li><strong>极大提升易用性</strong>。开发者只需使用2-3个注解（即启用事务服务：EnableOmega、全局事务标记：SagaStart和子事务标记：Compensable）。</li>
+  <li><strong>更方便扩展</strong>。对微服务框架的支持更友好。</li>
+  <li><strong>数据一致性与业务逻辑解耦</strong>。在演进后的设计中，通过服务侧omega的引入，saga协调器的职责更为单一（只需负责协调事务的完整性），与具体业务无关，因此，开发人员可以聚焦在具体业务的开发。</li>
+</ul>
+
+<p>Saga演进后的架构，如下图所示，主要包含两个组件，即alpha和omega，其中：</p>
+
+<ul>
+  <li>alpha充当协调者的角色，主要负责对事务的事件进行持久化存储以及协调子事务的状态，使其最终得以与全局事务的状态保持一致，即保证事务中的子事务要么全执行，要么全不执行。</li>
+  <li>omega是微服务中内嵌的一个agent，负责对网络请求进行拦截并向alpha上报事务事件，并在异常情况下根据alpha下发的指令执行相应的补偿或重试操作。</li>
+</ul>
+
+<p><img src="/assets/images/pack/pack.png" alt="" /></p>
+
+<h2 id="omega内部运行机制">omega内部运行机制</h2>
+
+<p>omega是微服务中内嵌的一个agent，负责向alpha上报事务状态并与其它omega直接传递事务上下文信息。其中，每个服务的事务上下文包括：</p>
+
+<ul>
+  <li>全局事务id(Global Tx Id)：用于唯一标识全局事务，一般在全局事务入口生成，并在整个事务过程中传递。</li>
+  <li>本地事务id(Local Tx Id)：用于唯一标识本地事务，一般由本地事务生成。</li>
+  <li>父事务id(Parent Tx Id)：用于构建子事务间的关系，可由请求上下文中构建。</li>
+</ul>
+
+<p>如下图所示，分布式事务与用于分布式调用链追踪的zipkin<a href="https://github.com/openzipkin/zipkin">[5]</a>的处理流程很类似，在服务提供方，omega会将请求拦截并从中提取请求信息中的全局事务id作为其自身的全局事务id（即Saga事件id），并将请求中的本地事务id作为其父事务id，且使用新生成的id作为本地事务id；在服务消费方，omega会将请求拦截并往其中添加当前的全局事务id和本地事务id。通过服务提供方和服务消费方的这种协作处理，子事务能连接起来形成一个完整的全局事务。</p>
+
+<p><img src="/assets/images/pack/id_flow.png" alt="" /></p>
+
+<p>omega在预处理阶段会先向alpha发送事务开始的事件，在后处理阶段会再向alpha发送事务结束的事件。alpha在收到事件后会进行持久化的存储。因此，每个成功的子事务都有一一对应的开始及结束事件。</p>
+
+<p><img src="/assets/images/pack/omega_internal.png" alt="" /></p>
+
+<p>在omega启动时会向alpha注册，使得异常或者超时场景下，alpha能通过回调向omega发送重试或补偿的命令和相应的调用参数，从而确保全局事务的一致性。</p>
+
+<h2 id="具体处理流程">具体处理流程</h2>
+
+<h3 id="成功场景">成功场景</h3>
+
+<p>全局事务开始前omega会先向alpha发送全局事务开始的事件，并在所有子事务完成时向alpha发送全局事务结束的事件。而每个子事务在执行前也会向alpha发送事务开始的事件，在成功执行后，会向alpha发送事务结束的事件。子事务间通过全局事务id连接在一起，但也因本地事务id而有所区分。因此，在成功场景下，每个开始的事件都会有对应的结束事件。</p>
+
+<p><img src="/assets/images/pack/successful_scenario.png" alt="" /></p>
+
+<h3 id="异常场景">异常场景</h3>
+
+<p>在子事务执行期间抛出异常时，omega会向alpha上报aborted事件，然后alpha会向该全局事务的其它已完成的子事务发送补偿指令，确保最终同一全局事务下的所有子事务要么都成功，要么都回滚。由于事务中没有明确指定全局事务中的参与者，因此，alpha的扫描器会定期查询事件表并找出已完成所有补偿子事务的全局事务，然后对这些全局事务添加全局事务结束事件以保证事务的完整性。</p>
+
+<p><img src="/assets/images/pack/exception_scenario.png" alt="" /></p>
+
+<h3 id="超时场景">超时场景</h3>
+
+<p>alpha的扫描器会定期扫描正在处理的事件状态，若发现事件超时，则会记录相应的aborted事件，然后alpha会向该全局事务的其它已完成的子事务发送补偿指令来恢复至事务开始前的状态。</p>
+
+<p><img src="/assets/images/pack/timeout_scenario.png" alt="" /></p>
+
+<h2 id="如何使用">如何使用？</h2>
+
+<p>Saga的使用主要涵盖两方面，alpha的启动及omega的使用。</p>
+
+<h3 id="alpha的启动">alpha的启动</h3>
+
+<p>alpha启动前需要先运行数据库PostgreSQL：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-e</span> <span class="s2">"POSTGRES_DB=saga"</span> <span class="nt">-e</span> <span class="s2">"POSTGRES_USER=saga"</span> <span class="nt">-e</span> <span class="s2">"POSTGRES_PASSWORD=password"</span> <span class="nt">-p</span> 5432:5432 postgres
+</code></pre></div></div>
+
+<p>在确保数据库正常启动后，即可运行alpha：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 8090:8090 <span class="se">\</span>
+  <span class="nt">-e</span> <span class="s2">"JAVA_OPTS=-Dspring.profiles.active=prd"</span> <span class="se">\</span>
+  <span class="nt">-e</span> <span class="s2">"spring.datasource.url=jdbc:postgresql://{docker.host.address}:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  alpha-server:0.1.0
+</code></pre></div></div>
+
+<h3 id="omega的使用">omega的使用</h3>
+
+<p>omega的使用很简单，以一个简化的转账业务为例，同一笔转账要么转入和转出都成功，要么都失败。在这样一个业务中引入Saga，只需简单几步即可：</p>
+
+<ol>
+  <li>引入依赖
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.saga<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>omega-spring-starter<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>0.1.0<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.saga<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>omega-transport-resttemplate<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>0.1.0<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>添加Saga的注解及相应的补偿方法
+2.1 在应用入口添加 <code class="highlighter-rouge">@EnableOmega</code> 的注解来初始化omega的配置并与alpha建立连接。
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@SpringBootApplication</span>
+ <span class="nd">@EnableOmega</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+     <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">Application</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+    <p>2.2 在全局事务的起点添加 <code class="highlighter-rouge">@SagaStart</code> 的注解。</p>
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@SagaStart</span><span class="o">(</span><span class="n">timeout</span><span class="o">=</span><span class="mi">10</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">transferMoney</span><span class="o">(</span><span class="nc">String</span> <span class="n">from</span><span class="o">,</span> <span class="nc">String</span> <span class="n">to</span><span class="o">,</span> <span class="kt">int</span> <span class="n">amount</span><span class="o">)</span> <span class="o">{</span>
+   <span class="n">transferOut</span><span class="o">(</span><span class="n">from</span><span class="o">,</span> <span class="n">amount</span><span class="o">);</span>
+   <span class="n">transferIn</span><span class="o">(</span><span class="n">to</span><span class="o">,</span> <span class="n">amount</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+    <p>2.3 在子事务处添加 <code class="highlighter-rouge">@Compensable</code> 的注解并指明其对应的补偿方法。其中，补偿方法的形参列表需与子事务方法的形参列表保持一致。</p>
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@Compensable</span><span class="o">(</span><span class="n">timeout</span><span class="o">=</span><span class="mi">5</span><span class="o">,</span> <span class="n">compensationMethod</span><span class="o">=</span><span class="s">"cancel"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">transferOut</span><span class="o">(</span><span class="nc">String</span> <span class="n">from</span><span class="o">,</span> <span class="kt">int</span> <span class="n">amount</span><span class="o">)</span> <span class="o">{</span>
+   <span class="n">repo</span><span class="o">.</span><span class="na">reduceBalanceByUsername</span><span class="o">(</span><span class="n">from</span><span class="o">,</span> <span class="n">amount</span><span class="o">);</span>
+ <span class="o">}</span>
+    
+ <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">cancel</span><span class="o">(</span><span class="nc">String</span> <span class="n">from</span><span class="o">,</span> <span class="kt">int</span> <span class="n">amount</span><span class="o">)</span> <span class="o">{</span>
+   <span class="n">repo</span><span class="o">.</span><span class="na">addBalanceByUsername</span><span class="o">(</span><span class="n">from</span><span class="o">,</span> <span class="n">amount</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+    <p>2.4 对转入服务重复第2.3步即可。</p>
+
+    <p>2.5 在每个服务的application.yaml中添加配置项，指明服务信息和alpha的地址信息：</p>
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">spring</span><span class="pi">:</span>
+   <span class="na">application</span><span class="pi">:</span>
+     <span class="na">name</span><span class="pi">:</span> <span class="pi">{</span><span class="nv">application.name</span><span class="pi">}</span>
+ <span class="na">alpha</span><span class="pi">:</span>
+   <span class="na">cluster</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="pi">{</span><span class="nv">alpha.cluster.addresses</span><span class="pi">}</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>目前Saga的实现还存在着很多有意思且有挑战性的课题，如alpha的协调调度实现、幂等的实现及自动补偿的实现等，欢迎有志之士与我们携手一起解决数据一致性的难题，共同为完善微服务生态贡献自己的力量。</p>
+
+<h2 id="参考文献">参考文献</h2>
+
+<p>[1] Sagas, Hector Garcia-Molina &amp; Kenneth Salem, <a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf</a></p>
+
+<p>[2] ServiceComb中的数据最终一致性方案，殷湘，<a href="http://blog.csdn.net/fl63zv9zou86950w/article/details/78393439">http://blog.csdn.net/fl63zv9zou86950w/article/details/78393439</a></p>
+
+<p>[3] ACID, Wikipedia, <a href="https://en.wikipedia.org/wiki/ACID">https://en.wikipedia.org/wiki/ACID</a></p>
+
+<p>[4] Apache ServiceComb(incubating) Saga, Apache, <a href="https://github.com/apache/incubator-servicecomb-saga">https://github.com/apache/incubator-servicecomb-saga</a></p>
+
+<p>[5] zipkin, zipkin, <a href="https://github.com/openzipkin/zipkin">https://github.com/openzipkin/zipkin</a></p>
+
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+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h3 id="servicecomb-saga使用cucumber做验收测试源码分析">ServiceComb Saga使用Cucumber做验收测试源码分析</h3>
+
+<h4 id="cucumber-简介">Cucumber 简介</h4>
+
+<p>Cucumber 是一个能够理解用普通语言描述的测试用例的自动化测试工具，可以让人们用近似自然的语言去描述特性Feature和场景Scenario，根据Feature驱动开发，用作软件技术人员和非技术之间验收测试的桥梁。它是一个命令行工具，运行后会执行features中的内容，feature中的step会调用step definitions 可以用标签来组织场景支持40多种语言包括 Java, Ruby 等。</p>
+
+<p><img src="/assets/images/cucumber.jpg" alt="" /></p>
+
+<p>Cucumber开发过程：</p>
+
+<ul>
+  <li>创建feature文件，feature文件中描述了测试用例集（Features），测试用例(Scenarios)，创建测试所需环境(Given)，触发被测试事件(When)和结果验证(Then)</li>
+  <li>创建step_definitions，此代码根据上面创建的feature文件，映射feature中的Gherkin Step为按步骤执行的代码，类似胶水的作用。</li>
+  <li>执行cucumber执行指令，格式化输出</li>
+</ul>
+
+<p>更多关于Cucumber的介绍请参考<a href="https://cucumber.io/">官网文档[2]</a>。</p>
+
+<h4 id="saga-使用-cucumber">Saga 使用 Cucumber</h4>
+
+<p>Saga项目对其下行程预定demo做了验收测试，我们对照Cucumber的开发过程分别分析成功执行完所有事务和出现异常时的自动化测试开发，在行程预定的demo中，全局事务<code class="highlighter-rouge">booking</code>有两个子事务分别是预定酒店服务<code class="highlighter-rouge">Hotel</code>和包车服务<code class="highlighter-rouge">Car</code>，只有酒店服务和包车服务全部成功行程预定服务才算成功，否则全部失败并回滚补偿。demo中假定了房源紧张，每个用户最多只能预定2间，关于此行程规划demo细节请参考<a href="https://github.com/apache/incubator-servicecomb-saga/tree/master/saga-demo/booking">文档[3]</a>。</p>
+
+<ul>
+  <li>
+    <p>成功完成所有事务</p>
+
+    <ol>
+      <li>
+        <p>创建feature文件<code class="highlighter-rouge">pack_success_scenario.feature</code>，定义Feature，并在feature中定义step</p>
+
+        <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Feature: Alpha records transaction events
+
+  Scenario: Everything is normal
+    Given Car Service is up and running
+    And Hotel Service is up and running
+    And Booking Service is up and running
+    And Alpha is up and running
+
+    When User Sean requests to book 2 cars and 1 rooms
+
+    Then Alpha records the following events
+      | serviceName  | <span class="nb">type</span>             |
+      | pack-booking | SagaStartedEvent |
+      | pack-car     | TxStartedEvent   |
+      | pack-car     | TxEndedEvent     |
+      | pack-hotel   | TxStartedEvent   |
+      | pack-hotel   | TxEndedEvent     |
+      | pack-booking | SagaEndedEvent   |
+
+    And Car Service contains the following booking orders
+      | name | amount | confirmed | cancelled |
+      | Sean | 2      | <span class="nb">true</span>      | <span class="nb">false</span>     |
+
+    And Hotel Service contains the following booking orders
+      | name | amount | confirmed | cancelled |
+      | Sean | 1      | <span class="nb">true</span>      | <span class="nb">false</span>     |
+</code></pre></div>        </div>
+
+        <p><code class="highlighter-rouge">Given</code> 定义了测试用例<code class="highlighter-rouge">Everything is normal</code>所需的4个条件分别是4个服务运行正常，<code class="highlighter-rouge">When</code>定义了触发用户<code class="highlighter-rouge">Sean</code>发起预定2辆车和1间房子的被测事件。<code class="highlighter-rouge">Then</code>中则指定了验证结果是<code class="highlighter-rouge">Alpha</code>记录的各子事务及子事务发生顺序，<code class="highlighter-rouge">Car</code>服务和<code class="highlighter-rouge">Hotel</code>服务则记录预定结果。</p>
+      </li>
+      <li>
+        <p>创建step_definitions <code class="highlighter-rouge">PackStepdefs.java</code></p>
+
+        <p>在step_definition中使用正则的方式对应feature中定义的的测试条件，触发测试并验证结果。如：</p>
+
+        <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nc">Given</span><span class="o">(</span><span class="s">"^Car Service is up and running$"</span><span class="o">,</span> <span class="o">()</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="n">probe</span><span class="o">(</span><span class="nc">System</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="no">CAR_SERVICE_ADDRESS</span><span class="o">));</span>
+    <span class="o">});</span>
+</code></pre></div>        </div>
+
+        <p>上面代码对应feature中第一个测试前提条件<code class="highlighter-rouge">Given car service is up and running</code>，<code class="highlighter-rouge">probe</code>函数式方位<code class="highlighter-rouge">Car</code>服务的一个Rest接口验证返回状态码来判断<code class="highlighter-rouge">Car</code>是否正常启动运行。接下来四个<code class="highlighter-rouge">Given</code>与此类似。</p>
+
+        <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">When</span><span class="o">(</span><span class="s">"^User ([A-Za-z]+) requests to book ([0-9]+) cars and ([0-9]+) rooms$"</span><span class="o">,</span> <span class="o">(</span><span class="n">username</span><span class="o">,</span> <span class="n">cars</span><span class="o">,</span> <span class="n">rooms</span><span class="o">)</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="n">log</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received request from user {} to book {} cars and {} rooms"</span><span class="o">,</span> <span class="n">username</span><span class="o">,</span> <span class="n">cars</span><span class="o">,</span> <span class="n">rooms</span><span class="o">);</span>
+
+      <span class="n">given</span><span class="o">()</span>
+          <span class="o">.</span><span class="na">pathParam</span><span class="o">(</span><span class="s">"name"</span><span class="o">,</span> <span class="n">username</span><span class="o">)</span>
+          <span class="o">.</span><span class="na">pathParam</span><span class="o">(</span><span class="s">"rooms"</span><span class="o">,</span> <span class="n">rooms</span><span class="o">)</span>
+          <span class="o">.</span><span class="na">pathParam</span><span class="o">(</span><span class="s">"cars"</span><span class="o">,</span> <span class="n">cars</span><span class="o">)</span>
+          <span class="o">.</span><span class="na">when</span><span class="o">()</span>
+          <span class="o">.</span><span class="na">post</span><span class="o">(</span><span class="nc">System</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="s">"booking.service.address"</span><span class="o">)</span> <span class="o">+</span> <span class="s">"/booking/{name}/{rooms}/{cars}"</span><span class="o">);</span>
+    <span class="o">});</span>
+</code></pre></div>        </div>
+
+        <p>此段代码解析feature中定义的<code class="highlighter-rouge">When User Sean requests to book 2 cars and 1 rooms</code>事件，解析出用户、预定车辆和房间数量参数并向<code class="highlighter-rouge">Booking</code>服务发出<code class="highlighter-rouge">POST</code>方法的请求，然后在下面代码的<code class="highlighter-rouge">Then</code>中验证结果：</p>
+
+        <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Then</span><span class="o">(</span><span class="s">"^Alpha records the following events$"</span><span class="o">,</span> <span class="o">(</span><span class="nc">DataTable</span> <span class="n">dataTable</span><span class="o">)</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="nc">Consumer</span><span class="o">&lt;</span><span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">String</span><span class="o">&gt;[]&gt;</span> <span class="n">columnStrippingConsumer</span> <span class="o">=</span> <span class="n">dataMap</span> <span class="o">-&gt;</span> <span class="o">{</span>
+        <span class="k">for</span> <span class="o">(</span><span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">String</span><span class="o">&gt;</span> <span class="n">map</span> <span class="o">:</span> <span class="n">dataMap</span><span class="o">)</span>
+          <span class="n">map</span><span class="o">.</span><span class="na">keySet</span><span class="o">().</span><span class="na">retainAll</span><span class="o">(</span><span class="n">dataTable</span><span class="o">.</span><span class="na">topCells</span><span class="o">());</span>
+      <span class="o">};</span>
+      <span class="n">dataMatches</span><span class="o">(</span><span class="nc">System</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="no">ALPHA_REST_ADDRESS</span><span class="o">)</span> <span class="o">+</span> <span class="s">"/events"</span><span class="o">,</span> <span class="n">dataTable</span><span class="o">,</span> <span class="n">columnStrippingConsumer</span><span class="o">);</span>
+    <span class="o">});</span>
+
+ <span class="nc">And</span><span class="o">(</span><span class="s">"^Car Service contains the following booking orders$"</span><span class="o">,</span> <span class="o">(</span><span class="nc">DataTable</span> <span class="n">dataTable</span><span class="o">)</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="n">dataMatches</span><span class="o">(</span><span class="nc">System</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="no">CAR_SERVICE_ADDRESS</span><span class="o">)</span> <span class="o">+</span> <span class="s">"/bookings"</span><span class="o">,</span> <span class="n">dataTable</span><span class="o">,</span> <span class="no">NO_OP_CONSUMER</span><span class="o">);</span>
+    <span class="o">});</span>
+
+    <span class="nc">And</span><span class="o">(</span><span class="s">"^Hotel Service contains the following booking orders$"</span><span class="o">,</span> <span class="o">(</span><span class="nc">DataTable</span> <span class="n">dataTable</span><span class="o">)</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="n">dataMatches</span><span class="o">(</span><span class="nc">System</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="no">HOTEL_SERVICE_ADDRESS</span><span class="o">)</span> <span class="o">+</span> <span class="s">"/bookings"</span><span class="o">,</span> <span class="n">dataTable</span><span class="o">,</span> <span class="no">NO_OP_CONSUMER</span><span class="o">);</span>
+    <span class="o">});</span>
+</code></pre></div>        </div>
+
+        <p>上面代码对应feature中<code class="highlighter-rouge">Then</code>结果从三方面验证预定事件是否符合预期：<code class="highlighter-rouge">Alpha</code>服务中记录的事件顺序、<code class="highlighter-rouge">Car</code>服务的预定结果和 <code class="highlighter-rouge">Hotel</code>服务中的预定结果。<code class="highlighter-rouge">DataTable</code>解析了feature中定义的事件结果和顺序，<code class="highlighter-rouge">dataMatches</code>将此结果与各服务中查询到的结果进行比较验证是不是符合预期。</p>
+      </li>
+      <li>
+        <p>执行Command <code class="highlighter-rouge">RunCucumberIT.java</code></p>
+
+        <p><code class="highlighter-rouge">@Runwith(Cucumber.class)</code>指定使用Cucumber测试框架入口，并在<code class="highlighter-rouge">@CucumberOptions</code>中指定feature目录和输出格式。</p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>有子事务出现异常测试</p>
+
+    <p>由于房源紧张，限制每个用户最多预订2间房，当用户预订超过2间时会抛出异常：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Compensable</span><span class="o">(</span><span class="n">compensationMethod</span> <span class="o">=</span> <span class="s">"cancel"</span><span class="o">)</span>
+  <span class="kt">void</span> <span class="nf">order</span><span class="o">(</span><span class="nc">HotelBooking</span> <span class="n">booking</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">booking</span><span class="o">.</span><span class="na">getAmount</span><span class="o">()</span> <span class="o">&gt;</span> <span class="mi">2</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"can not order the rooms large than two"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="n">booking</span><span class="o">.</span><span class="na">confirm</span><span class="o">();</span>
+    <span class="n">bookings</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="n">booking</span><span class="o">.</span><span class="na">getId</span><span class="o">(),</span> <span class="n">booking</span><span class="o">);</span>
+  <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>在此异常测试中我们预订事件中预订3间房，由于订房间失败，整个行程事务没有成功，对已经成功执行的订车子事务进行补偿保证原子性。</p>
+
+    <ol>
+      <li>
+        <p>创建feature文件<code class="highlighter-rouge">pack_compensation_scenario.feature</code></p>
+
+        <p>与成功的行程规划测试中不同的只有触发的预定事件和最终的结果，前提条件都是4个服务启动并运行，所以feature只要修改<code class="highlighter-rouge">When</code>和<code class="highlighter-rouge">Then</code>内容即可（Features和Scenarios名也要对应修改）</p>
+
+        <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="s">When User Sean requests to book 5 cars and 3 rooms</span>
+
+    <span class="s">Then Alpha records the following events</span>
+      <span class="s">| serviceName  | type               |</span>
+      <span class="s">| pack-booking | SagaStartedEvent   |</span>
+      <span class="s">| pack-car     | TxStartedEvent     |</span>
+      <span class="s">| pack-car     | TxEndedEvent       |</span>
+      <span class="s">| pack-hotel   | TxStartedEvent     |</span>
+      <span class="s">| pack-hotel   | TxAbortedEvent     |</span>
+      <span class="s">| pack-car     | TxCompensatedEvent |</span>
+      <span class="s">| pack-car     | SagaEndedEvent     |</span>
+
+    <span class="s">Then Car Service contains the following booking orders</span>
+      <span class="s">| name | amount | confirmed | cancelled |</span>
+      <span class="s">| Sean | 5      | </span><span class="no">false</span><span class="s">     | </span><span class="no">true</span><span class="s">      |</span>
+
+    <span class="s">Then Hotel Service contains the following booking orders</span>
+      <span class="s">| name | amount | confirmed | cancelled |</span>
+</code></pre></div>        </div>
+      </li>
+      <li>
+        <p>step_definition和Command与之前一样，不需要任何修改，触发预定超过3个房间的操作后，<code class="highlighter-rouge">Alpha</code>会记录Hotel服务的<code class="highlighter-rouge">TxAbortedEvent</code>和Car服务的<code class="highlighter-rouge">TxCompensatedEvent</code>时间，此外Car服务的预定记录中会有取消为<code class="highlighter-rouge">true</code>的记录。</p>
+      </li>
+    </ol>
+
+    <p>通过以上两个例子分析，Cucumber开发只需要在feature中定义好测试所需条件，触发事件和结果验证信息，然后在step_definition中进行解析验证即可。</p>
+  </li>
+</ul>
+
+<h4 id="byteman-规则注入">Byteman 规则注入</h4>
+
+<p><code class="highlighter-rouge">Byteman</code>可以在代码的任意位置注入代码，并可以在注入的代码中访问当前方法中变量，包括方法参数、局部变量、调用其他函数的参数值、返回值等。更多关于Byteman的介绍请参考<a href="http://byteman.jboss.org/docs.html">官方文档[4]</a>。</p>
+
+<p>Byteman开发过程：</p>
+
+<ul>
+  <li>
+    <p>创建规则脚本.btm文件</p>
+
+    <p>根据byteman语法创建规则，包括规则名，目标类，目标方法，注入位置，注入内容等，下面是一个在<code class="highlighter-rouge">main</code>函数入口注入打印语句的规则文件例子</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="s">RULE trace main entry</span>
+<span class="s">CLASS AppMain</span>
+<span class="s">METHOD main</span>
+<span class="s">AT ENTRY</span>
+<span class="s">IF </span><span class="no">true</span>
+<span class="s">DO traceln("entering main")</span>
+<span class="s">ENDRULE</span>
+</code></pre></div>    </div>
+
+    <p>在安装了byteman环境的机器上用javaagent参数指定加载规则文件运行AppMain即可在main函数入口处打印出<code class="highlighter-rouge">entering main</code>。例子<a href="https://github.com/adinn/byteman-tutorial1">源码请参考[5]</a></p>
+  </li>
+  <li>
+    <p>加载规则并运行</p>
+
+    <p>除了上面例子中通过命令行指定javaagent指定byteman 规则文件的加载方式外，还可以通过Java代码的方式加载，如下</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Submit</span> <span class="n">bm</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Submit</span><span class="o">(</span><span class="n">address</span><span class="o">,</span> <span class="n">port</span><span class="o">);</span>
+<span class="n">bm</span><span class="o">.</span><span class="na">addRulesFromFiles</span><span class="o">(</span><span class="n">rules</span><span class="o">);</span>
+</code></pre></div>    </div>
+
+    <p><code class="highlighter-rouge">org.jboss.byteman.agent.submit.Submit</code>提供的加载规则的方法有通过文件加载<code class="highlighter-rouge">addRulesFromFiles</code>和<code class="highlighter-rouge">addRulesFromResources</code></p>
+
+    <p>同样，byteman提供了移除规则的方法<code class="highlighter-rouge">deleteRulesFromFiles</code>，<code class="highlighter-rouge">deleteRulesFromResources</code>和<code class="highlighter-rouge">deleteAllRules</code>。</p>
+  </li>
+</ul>
+
+<h4 id="saga-使用-cucumber-集成-byteman">Saga 使用 Cucumber 集成 Byteman</h4>
+
+<p>Saga在Cucumber中集成了byteman注入一个超时异常，测试Saga对超时处理是否符合预期。</p>
+
+<ol>
+  <li>
+    <p>创建byteman规则文件：<code class="highlighter-rouge">booking_timeout.btm</code></p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="s">RULE set the saga timeout to 5s</span>
+<span class="s">INTERFACE org.apache.servicecomb.saga.omega.context.annotations.SagaStart</span>
+<span class="s">METHOD timeout</span>
+<span class="s">AT EXIT</span>
+<span class="s">IF TRUE</span>
+<span class="s">DO RETURN </span><span class="m">5</span>
+<span class="s">ENDRULE</span>
+
+<span class="s">RULE sleep when postBooking until timeout happens</span>
+<span class="s">CLASS org.apache.servicecomb.saga.demo.pack.booking.BookingController</span>
+<span class="s">METHOD postBooking</span>
+<span class="s">AT ENTRY</span>
+<span class="s">IF TRUE</span>
+<span class="s">DO debug("delay 10s until the booking timeout"),</span>
+   <span class="s">Thread.sleep(10000)</span>
+<span class="s">ENDRULE</span>
+</code></pre></div>    </div>
+
+    <p>这里定义了两个规则，第一个规则<code class="highlighter-rouge">set the saga timeout to 5s</code>在注解<code class="highlighter-rouge">@SagaStart</code>的<code class="highlighter-rouge">timeout</code>方法中返回5表示设置超时时间值为5秒。第二个规则<code class="highlighter-rouge">sleep when postBooking until timeout happens</code>在类<code class="highlighter-rouge">BookingController</code>的<code class="highlighter-rouge">postBooking</code>方法中注入<code class="highlighter-rouge">Thread.sleep(10000)</code>，让<code class="highlighter-rouge">postBooking</code>方法阻塞10秒，原来的<code class="highlighter-rouge">postBooking</code>方法是一个空方法，注入byteman的阻塞方法后会触发预定行程服务的超时异常。</p>
+  </li>
+  <li>
+    <p>创建feature文件：<code class="highlighter-rouge">pack_timeout_scenario.feature</code></p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> 	</span><span class="s">Given Install the byteman script booking_timeout.btm to Booking Service</span>
+
+    <span class="s">When User Sean requests to book 1 cars and 1 rooms</span>
+
+    <span class="s">Then Alpha records the following events</span>
+      <span class="s">| serviceName  | type               |</span>
+      <span class="s">| pack-booking | SagaStartedEvent   |</span>
+      <span class="s">| pack-car     | TxStartedEvent     |</span>
+      <span class="s">| pack-car     | TxEndedEvent       |</span>
+      <span class="s">| pack-hotel   | TxStartedEvent     |</span>
+      <span class="s">| pack-hotel   | TxEndedEvent       |</span>
+      <span class="s">| pack-booking | TxAbortedEvent     |</span>
+      <span class="s">| pack-hotel   | TxCompensatedEvent |</span>
+      <span class="s">| pack-car     | TxCompensatedEvent |</span>
+      <span class="s">| pack-booking | SagaEndedEvent     |</span>
+
+    <span class="s">Then Car Service contains the following booking orders</span>
+      <span class="s">| name | amount | confirmed | cancelled |</span>
+      <span class="s">| Sean | 1      | </span><span class="no">false</span><span class="s">     | </span><span class="no">true</span><span class="s">      |</span>
+
+    <span class="s">Then Hotel Service contains the following booking orders</span>
+      <span class="s">| name | amount | confirmed | cancelled |</span>
+      <span class="s">| Sean | 1      | </span><span class="no">false</span><span class="s">     | </span><span class="no">true</span><span class="s">      |</span>
+</code></pre></div>    </div>
+
+    <p>在行程预定的例子中仍然以4个服务启动并运行为前提，然后加载上面创建的byteman规则文件和目标服务：<code class="highlighter-rouge">Booking</code>。然后触发预定一辆车和一间房的操作。</p>
+  </li>
+  <li>
+    <p>step_definition解析</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nc">Given</span><span class="o">(</span><span class="s">"^Install the byteman script ([A-Za-z0-9_\\.]+) to ([A-Za-z]+) Service$"</span><span class="o">,</span> <span class="o">(</span><span class="nc">String</span> <span class="n">script</span><span class="o">,</span> <span class="nc">String</span> <span class="n">service</span><span class="o">)</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="n">log</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Install the byteman script {} to {} service"</span><span class="o">,</span> <span class="n">script</span><span class="o">,</span> <span class="n">service</span><span class="o">);</span>
+      <span class="nc">List</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="n">rules</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">ArrayList</span><span class="o">&lt;&gt;();</span>
+      <span class="n">rules</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="s">"target/test-classes/"</span> <span class="o">+</span> <span class="n">script</span><span class="o">);</span>
+      <span class="nc">Submit</span> <span class="n">bm</span> <span class="o">=</span> <span class="n">getBytemanSubmit</span><span class="o">(</span><span class="n">service</span><span class="o">);</span>
+      <span class="n">bm</span><span class="o">.</span><span class="na">addRulesFromFiles</span><span class="o">(</span><span class="n">rules</span><span class="o">);</span>
+    <span class="o">});</span>
+</code></pre></div>    </div>
+
+    <p>在Cucumber解析文件中用正则方法获取目标规则和服务名，<code class="highlighter-rouge">getBytemanSubmit</code>根据服务名<code class="highlighter-rouge">service</code>参数来获取目标服务的地址和byteman监听端口，并将本地规则注入到目标服务中，注入原理是<code class="highlighter-rouge">Booking</code>启动时是带着byteman参数启动的：</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">-Dorg</span>.jboss.byteman.debug<span class="o">=</span><span class="nb">true</span> <span class="nt">-Dorg</span>.jboss.byteman.verbose<span class="o">=</span>tru
+<span class="nt">-javaagent</span>:/maven/saga/byteman.jar<span class="o">=</span>port:9091,address:0.0.0.0,listener:true
+</code></pre></div>    </div>
+
+    <p>执行<code class="highlighter-rouge">bm.addRulesFromFiles(rules);</code>时就可以把本地规则通过Socket发送到<code class="highlighter-rouge">Booking</code>服务，并由Byteman完成字节替换。</p>
+  </li>
+  <li>
+    <p>结果验证</p>
+
+    <p>注入规则后触发预定车辆和房间服务时预定服务会出现超时，Saga会对已经完成的订车和订房间子事务进行补偿，Alpha中记录了一些列事件以及他们发生的顺序，另外Car服务和Hotel服务的取消标记<code class="highlighter-rouge">cancelled</code>也为<code class="highlighter-rouge">true</code>。</p>
+  </li>
+</ol>
+
+<p>代码中使用Cucumber和Byteman要先通过pom引入相关依赖</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>	<span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>io.cucumber<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>cucumber-java8<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>${cucumber.version}<span class="nt">&lt;/version&gt;</span>
+      <span class="nt">&lt;scope&gt;</span>test<span class="nt">&lt;/scope&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>io.cucumber<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>cucumber-junit<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>${cucumber.version}<span class="nt">&lt;/version&gt;</span>
+      <span class="nt">&lt;scope&gt;</span>test<span class="nt">&lt;/scope&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.jboss.byteman<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>byteman-submit<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>${byteman.version}<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>本地运行调试需要在启动的时候使用javaagent启动byteman，建议通过修改docker-compose.yaml文件，指定可执行jar的启动参数，并修改stepdef解析文件中各个服务地址，个服务启动运行后在IDEA中运行相应的feature文件即可进行调试测试。运行调试版代码可参考<a href="https://github.com/lijasonvip/incubator-servicecomb-saga/tree/debug-cucumber-byteman">个人分支代码[6]</a></p>
+
+<p>欢迎开发者朋友们加入ServiceComb社区，一起做些有意思的事情。<a href="http://servicecomb.incubator.apache.org/cn/docs/join_the_community/">加入社区方法[7]</a></p>
+
+<h4 id="参考资料">参考资料</h4>
+
+<p>[1] ServiceComb Saga  https://github.com/apache/incubator-servicecomb-saga</p>
+
+<p>[2] Cucumber  https://cucumber.io/</p>
+
+<p>[3] Saga booking demo  https://github.com/apache/incubator-servicecomb-saga/tree/master/saga-demo/booking</p>
+
+<p>[4] Byteman  http://byteman.jboss.org/docs.html</p>
+
+<p>[5] Byteman demo https://github.com/adinn/byteman-tutorial1</p>
+
+<p>[6] debug 分支 https://github.com/lijasonvip/incubator-servicecomb-saga/tree/debug-cucumber-byteman</p>
+
+<p>[7] 加入ServiceComb 社区  http://servicecomb.incubator.apache.org/cn/docs/join_the_community/</p>
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+    <meta itemprop="description" content="介绍如何一步一步构建秒杀项目的过程">
+    <meta itemprop="datePublished" content="August 26, 2017">
+    <meta itemprop="dateModified" content="September 13, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">秒杀开发历程（一）
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="概述">概述</h2>
+<p>　　秒杀是我们ServiceComb开源团队以领域驱动设计（<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>）为背景，如何从零开始构建一个微服务架构的示例项目。在这个过程中，您可以学习到微服务架构区别于传统单体程序架构的诸多特点，同时我们还将使用敏捷开发的模式快速构建它。</p>
+
+<h2 id="背景">背景</h2>
+<p>　　秒杀的需求起源于互联网常见的促销方式——支付订单的时候，我们可以支持使用优惠券获得一些折扣，由于优惠券的数量是非常有限的，所以我们必须提供一个平台，让每一位希望得到它的人公平竞争，这样的场景我相信在平日的生活中随处可见。</p>
+
+<p>　　由于秒杀是一个示例项目，所以我们不希望它太复杂，真实的秒杀活动需要考虑的细节要远远超过我们的想象；我们也不希望它太过于具体在特定的形式，例如优惠券、满减、抢购码，等等，这样总会让部分读者难以理解；最后，我们使用了先到先得这种最原始的策略，如果您想尝试其他策略，可以下载代码自行修改，我相信也不会太困难。</p>
+
+<h2 id="初次设计">初次设计</h2>
+<p>　　首先我们分析客户核心业务述求：</p>
+
+<ol>
+  <li>客户可以请求秒杀一张优惠券，系统返回获取优惠券成功或失败（已经被秒光了）；</li>
+  <li>客户可以查询自己目前有多少张优惠券；</li>
+</ol>
+
+<p>　　那么我们开始吧，等等，您说这个描述也太简单了？客户还没有登录系统呢，秒杀活动又是怎么来的，怎么开始的？客户是请求哪个活动的优惠券呀？折扣是不是不一样？还有……</p>
+
+<p>　　确实，我们习惯于在一开始就思考很多，一些较大的系统，可能设计阶段就要几个月，但是这次可以不用考虑太多，因为我认为：</p>
+<ol>
+  <li>设计太多并不能保证构建完毕后就一定能完全符合需求，唯一不变的就是需求总是变化，所以不要过度设计；</li>
+  <li>微服务架构的原则是组件（服务）提供较为单一的功能，所以每个组件所需要实现的功能范围比较小，不必先将所有的功能都设计出来；</li>
+  <li>应该尽快切入主题，也就是立刻去解决核心域的问题。</li>
+</ol>
+
+<p>　　现在，我们需要使用正确的“姿势”完成设计过程——遵循领域驱动设计（<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>）的诸多原则，设计过程的核心就是识别出实体、值对象和服务等元素，进一步寻找聚合；由于我们的需求非常简单，所以很容易就能将它们找出来：</p>
+<ul>
+  <li>实体：促销秒杀（Promotion）</li>
+  <li>值对象：优惠券（Coupon），促销秒杀事件（PromotionEvent）</li>
+  <li>领域服务：秒杀活动（SecKill）</li>
+</ul>
+
+<p>　　之后我们分析他们之间的聚合，分出两个微服务，为了能快速达到目的，它们之间直接使用MySQL共享数据（微服务推荐使用独立的存储，我们未来去改造）：</p>
+<ol>
+  <li>Command：SecKill领域服务；</li>
+  <li>Query： Coupon值对象查询</li>
+</ol>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-arth.png" alt="图1 初次架构" class="align-center" /></p>
+
+<h2 id="功能实现">功能实现</h2>
+<p>　　秒杀的代码托管在<a href="https://github.com/ServiceComb/seckill">Github</a>，欢迎Watch和Star。</p>
+
+<h3 id="command微服务的实现">Command微服务的实现</h3>
+<p>　　我们设计了SecKillCommandService和SecKillPersistentRunner两个类分别完成秒杀处理和结果持久化，考虑到持久化速度慢，我们使用BlockQueue做缓存；另外设计了SecKillCommandRestController作为客户请求的Endpoint；ServiceComb支持多种编程模型和通信模型，我们使用目前较较为流行的Spring Boot Rest作为基础框架，如果您的程序也使用了它，那么只需要稍加调整即可无缝上云。</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-command.png" alt="图2 Command微服务组件" class="align-center" /></p>
+
+<h2 id="query微服务的实现">Query微服务的实现</h2>
+<p>　　查询逻辑较简单，因为PromotionEvent是值对象，我们使用了PromotionEvent推导Coupon，各位看官读读代码就明白了。</p>
+
+<h2 id="构建支撑域">构建支撑域</h2>
+<p>　　Promotion是实体，诚然，就像一开始提到的，我们需要在另外一个领域去管理（构建）它才能开始后面的秒杀活动，由于我们直接切入核心域展开工作，支撑域和普通域部分目前我们通过Spring注入固定对象来完成，例如：</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-spring.png" alt="图3 支撑域注入" class="align-center" /></p>
+
+<h2 id="功能验证">功能验证</h2>
+<p>　　最后，我们使用PostMan体验完成的功能，请注意Body的填写使用JSON格式，并且类型选择JSON(application/json)：</p>
+<h3 id="请求秒杀">请求秒杀</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-request-seckill.png" alt="图4 请求秒杀" class="align-center" /></p>
+
+<h3 id="查询拥有的优惠券">查询拥有的优惠券</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-query-coupons.png" alt="图5 查询拥有的优惠券" class="align-center" /></p>
+
+        
+      </section>
+
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+            
+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> 最新的:</strong> <time datetime="2017-09-13">2017年9月13日</time></p>
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+    <meta itemprop="headline" content="秒杀开发历程（二）">
+    <meta itemprop="description" content="介绍如何一步一步构建秒杀项目的过程">
+    <meta itemprop="datePublished" content="August 30, 2017">
+    <meta itemprop="dateModified" content="September 13, 2017">
+
+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">秒杀开发历程（二）
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
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+            
+          </header>
+        
+      
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+      <section class="page__content" itemprop="text">
+        <p>　　<a href="/cn/docs/seckill-development-journey-part-I/">上文</a> 中我们构建了一个仅具有核心功能的秒杀框架，本篇中我们会逐步完善一些功能，使得它具备完整的基础功能。</p>
+
+<h2 id="问题点完善范围">问题点（完善范围）</h2>
+<p>　　回顾设计和参照已完成的部分，我们可以发现：</p>
+<ol>
+  <li>没有提供Promotion实体的服务（Promotion是固定通过Spring注入的）；</li>
+  <li>缺乏一些基本的业务检查和功能，包括：
+    <ul>
+      <li>同一个客户在同一个Promotion中只能秒杀一次（不允许重复）</li>
+      <li>同时可以有多个Promotion进行（折扣不同，数量也不同）</li>
+    </ul>
+  </li>
+  <li>如果Command微服务故障，再次恢复后，需要恢复未完成正在进行中的秒杀活动。</li>
+</ol>
+
+<p>　　也许您会说，客户管理和客户登录为什么没有罗列出来？的确，客户在我们的场景中是不可或缺的，但是我们为了简化设计，没有包含登录以及请求认证的内容，如果对这方面感兴趣您可以移步到ServiceComb的Company示例实现了一个简单基于token的认证方式，地址在<a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop">Company</a>。</p>
+
+<h2 id="再次设计">再次设计</h2>
+<p>　　对于实体，领域驱动设计（<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>）推荐使用独立接口，因此我们设计一个新的Admin微服务来提供服务：</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-arth.png" alt="图1 增加了Admin微服务后的架构" class="align-center" /></p>
+
+<h2 id="功能实现">功能实现</h2>
+<h3 id="admin微服务的实现">Admin微服务的实现</h3>
+<p>　　Admin微服务紧紧围绕Promotion实体提供服务，我们完全可以映射到对应的REST方式，即：</p>
+<ul>
+  <li>新增Promotion对应Post；　　</li>
+  <li>修改Promotion对应Put；　　</li>
+  <li>查询Promotion对应Get；　　</li>
+  <li>删除Promotion对应Delete。　　</li>
+</ul>
+
+<p>　　满足当前的需求只需要完成Post和Put就可以了，另外，考虑到已经开始的秒杀活动不应该能修改，我们增加了对应的检查逻辑。</p>
+
+<h3 id="检查和功能的实现">检查和功能的实现</h3>
+<p>　　通过增加一个HashSet检查客户是否重复秒杀成功；<br />
+　　构建SecKillPromotionBootstrap作为Promotion启动的管理器用于支持多个Promotion同时进行，将SecKillCommandService和SecKillPersistentRunner使用集合管理。</p>
+
+<h3 id="command微服务故障恢复的实现">Command微服务故障恢复的实现</h3>
+<p>　　构建SecKillRecoveryService处理Promotion恢复检查，未完成的Promotion无论是未开始的还是进行中的，都需要它完成检查返回正确的恢复信息，信息包括剩余券数、已秒杀成功的客户列表等。</p>
+
+<h2 id="功能验证">功能验证</h2>
+<p>　　最后，我们使用PostMan体验完成的功能，请注意Body的填写使用JSON格式，并且类型选择JSON(application/json)：</p>
+<h3 id="创建秒杀活动">创建秒杀活动</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-create-promotion.png" alt="图2 创建秒杀活动" class="align-center" /></p>
+
+<h3 id="查询正在进行的秒杀活动">查询正在进行的秒杀活动</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-query-active-promotion.png" alt="图3 查询正在进行的秒杀活动" class="align-center" /></p>
+
+<h3 id="拒绝重复秒杀">拒绝重复秒杀</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-reject-duplicate-grab.png" alt="图4 拒绝重复秒杀" class="align-center" /></p>
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+    <meta itemprop="headline" content="秒杀开发历程（三）">
+    <meta itemprop="description" content="介绍如何一步一步构建秒杀项目的过程">
+    <meta itemprop="datePublished" content="September 07, 2017">
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+            <h1 class="page__title" itemprop="headline">秒杀开发历程（三）
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
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+        
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+      <section class="page__content" itemprop="text">
+        <p>　　<a href="/cn/docs/seckill-development-journey-part-II/">上文</a> 中我们已经构建了一个完整功能的秒杀系统，版本定为0.1.0-RELEASE；您应该发现，数据的持久化集中在单一的数据库上，秒杀作为一个高并发压力的场景，这种架构很难适应可扩展的要求，并且正如我们一开始就提到的，微服务推荐拥有独立的存储，所以本篇开始我们将配合Event Sourcing实现CQRS模式，以增强应对大规模并发压力的能力。</p>
+
+<h2 id="cqrs">CQRS</h2>
+<p>　　<a href="https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs">CQRS</a> 的含义是命令查询职责分离（Command Query Responsibility Segregation），是一种常用的程序设计模式，常常与Event Sourcing一起使用，关于CQRS有一张科普的图，来源于Microsoft MSDN：</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-III-cqrs.png" alt="图1 CQRS" class="align-center" /></p>
+
+<h2 id="改进设计">改进设计</h2>
+<p>　　<a href="https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs">CQRS</a>是读写分离以及消息驱动的最佳实践，现在我们把目光聚焦在原来的MySQL数据库上：</p>
+<ol>
+  <li>数据库应该被拆分为ReadDB和WriteDB，分别承载读密集的Query微服务和写密集的Command微服务；</li>
+  <li>ReadDB和WriteDB之间采用Event Message驱动方式完成数据同步，因此我们还需要引进一个新的微服务，我们将它命名为Event（Processor）微服务；</li>
+  <li>Message Broker目前有很多非常棒的方案，例如RabbitMQ、Kafka等，由于我们的秒杀系统基于ServiceComb和Spring Boot，为了能够快速构建这个新特性，我们选用内置的ActiveMQ，它支持内存队列模式，非常容易构建测试，符合我们敏捷开发的方式。<br />
+ 改进完成后的架构如下图：</li>
+</ol>
+
+<p><img src="/assets/images/seckill-develop-course-part-III-arch.png" alt="图2 改进架构" class="align-center" /></p>
+
+<h2 id="功能实现">功能实现</h2>
+<h3 id="数据库拆分">数据库拆分</h3>
+<h4 id="writedb">WriteDB</h4>
+<p>　　Admin微服务维护Promotion实体；<br />
+　　Command微服务写入Event值对象，当恢复Promotion的时候，Relapy Event。</p>
+<h4 id="readdb">ReadDB</h4>
+<p>　　Event微服务写入ActivePromotion值对象和Coupon值对象；<br />
+　　Query微服务查询ActivePromotion值对象和Coupon值对象。</p>
+
+<h3 id="command微服务message-publisher组件">Command微服务Message Publisher组件</h3>
+<p>　　之前的版本由于没有引入Event Sourcing，Event实体只需要直接写入数据库即可，现在需要将Event发布给Message Broker，为了支持云服务（<a href="http://www.hwclouds.com/">华为云</a>）提供的分布式消息服务，我们定义了通用消息发布接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">SecKillMessagePublisher</span> <span class="o">{</span>
+  <span class="kt">void</span> <span class="nf">publishMessage</span><span class="o">(</span><span class="nc">String</span> <span class="n">messageContent</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="event微服务的实现">Event微服务的实现</h3>
+<p>　　Event微服务订阅Message Broker获取Event Message，然后根据不同的Event类型，转化为对ReadDB中的值对象操作或Coupon值对象操作：</p>
+<ul>
+  <li>Promotion Start Message：创建ActivePromotion值对象；</li>
+  <li>Promotion Finish Message：删除对应PromotionId的ActivePromotion值对象；</li>
+  <li>Coupon Grabbed Message：创建Coupon值对象；</li>
+</ul>
+
+<p>　　同样，为了支持云服务（<a href="http://www.hwclouds.com/">华为云</a>）提供的分布式消息服务，我们定义了通用消息订阅接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">SecKillMessageSubscriber</span> <span class="o">{</span>
+  <span class="kt">void</span> <span class="nf">subscribeMessage</span><span class="o">(</span><span class="nc">String</span> <span class="n">messageContent</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="query微服务的重构">Query微服务的重构</h3>
+<p>　　经过了读写分离的改造，现在所有活跃的Promotion都保存在ActivePromotion值对象表中，而客户成功秒杀的Coupon都保存在Coupon值对象表中，因此直接查询即可，不再需要Replay Event。</p>
+
+<h2 id="一键启动">一键启动</h2>
+<p>　　现在，我们完成了完整的Event Sourcing架构改造，为了能够方便启动，我们提供了编排好的脚本，使用Docker Compose将所有服务一条指令全部拉起来，具体的操作请参见<a href="https://github.com/ServiceComb/seckill">SecKill</a>。</p>
+
+<h3 id="在docker-toolbox中启动的seckill">在Docker ToolBox中启动的SecKill</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-III-seckill-all-in-one.png" alt="图3 SecKill All-in-One" class="align-center" /></p>
+
+<h2 id="参考资料">参考资料</h2>
+<ol>
+  <li><a href="https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs">Command and Query Responsibility Segregation (CQRS) pattern</a> by Microsoft Azure Team</li>
+  <li><a href="https://msdn.microsoft.com/en-us/library/jj591559.aspx">Introducing Event Sourcing</a> by Microsoft patterns &amp; practices Developer Center</li>
+  <li><a href="https://martinfowler.com/eaaDev/EventSourcing.html">Event Sourcing</a> by Martin Fowler</li>
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#服务中心-servicecenter" id="markdown-toc-服务中心-servicecenter">服务中心 ServiceCenter</a></li>
+  <li><a href="#版本发布包启动" id="markdown-toc-版本发布包启动">版本发布包启动</a></li>
+  <li><a href="#docker镜像启动" id="markdown-toc-docker镜像启动">Docker镜像启动</a></li>
+  <li><a href="#kubernetes-部署" id="markdown-toc-kubernetes-部署">Kubernetes 部署</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="服务中心-servicecenter">服务中心 ServiceCenter</h2>
+<p>ServiceCenter是一个服务注册中心。 服务提供者可以将自身的实例信息注册到 ServiceCenter，以供服务消费者发现并使用它。</p>
+
+<h2 id="版本发布包启动">版本发布包启动</h2>
+<ol>
+  <li>下载 <a href="/cn/release/service-center-downloads/">最新版本的Service-Center</a><br />
+此处使用了 apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz 包做介绍，实际操作时请根据系统环境从下载页面选取最新版本</li>
+  <li>启动服务
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 解压tar包</span>
+<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span>  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
+   
+<span class="c"># 启动servicecenter服务</span>
+<span class="nv">$ </span><span class="nb">cd </span>apache-servicecomb-service-center-1.3.0-linux-amd64/
+<span class="nv">$ </span>./start-service-center.sh
+</code></pre></div>    </div>
+  </li>
+  <li>查看服务状态
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 查看进程状态</span>
+<span class="nv">$ </span>ps <span class="nt">-ef</span> | <span class="nb">grep </span>service-center
+root     27048     1  2 14:38 pts/2    00:00:00 ./service-center
+root     27164 22742  0 14:38 pts/2    00:00:00 <span class="nb">grep</span> <span class="nt">--color</span><span class="o">=</span>auto service-center
+   
+<span class="c"># 查看端口监听</span>
+<span class="nv">$ </span>netstat <span class="nt">-apn</span> | <span class="nb">grep</span> :30100
+tcp        0      0 127.0.0.1:30100         0.0.0.0:<span class="k">*</span>               LISTEN      27048/service-cente
+   
+<span class="c"># curl命令调用接口</span>
+<span class="nv">$ </span>curl http://127.0.0.1:30100
+<span class="o">{</span><span class="s2">"_links"</span>:<span class="o">{</span><span class="s2">"pb:latest-pact-versions"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/latest"</span>,<span class="s2">"title"</span>:<span class="s2">"Latest pact versions"</span><span class="o">}</span>,<span class="s2">"pb:latest-provider-pacts"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/provider/{provider}/latest"</span>,<span class="s2">"title"</span>:<span class="s2">"Latest pacts by provider"</span>,<span class="s2">"templated"</span>:true<span class="o">}</span>,<span class="s2">"pb:latest-provider-pacts-with-tag"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/provider/{provider}/latest/{tag}"</span>,<span class="s2">"title"</span>:<span class="s2">"Latest pacts by provider with a specified tag"</span>,<span class="s2">"templated"</span>:true<span class="o">}</span>,<span class="s2">"pb:pacticipants"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/participants"</span>,<span class="s2">"title"</span>:<span class="s2">"Pacticipants"</span><span class="o">}</span>,<span class="s2">"pb:publish-pact"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/provider/{provider}/consumer/{consumer}/version/{consumerApplicationVersion}"</span>,<span class="s2">"title"</span>:<span class="s2">"Publish a pact"</span>,<span class="s2">"templated"</span>:true<span class="o">}</span>,<span class="s2">"pb:webhooks"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/webhooks"</span>,<span class="s2">"title"</span>:<span class="s2">"Webhooks"</span><span class="o">}</span>,<span class="s2">"self"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/"</span>,<span class="s2">"title"</span>:<span class="s2">"Index"</span><span class="o">}}</span>,<span class="s2">"curies"</span>:[<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/doc/{rel}"</span>,<span class="s2">"name"</span>:<span class="s2">"pb"</span><span class="o">}]}</span>
+   
+<span class="c"># 返回如上json串即为启动成功</span>
+</code></pre></div>    </div>
+  </li>
+  <li>启动前端页面并查看状态
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./start-frontend.sh
+<span class="nv">$ </span>ps <span class="nt">-ef</span> | <span class="nb">grep </span>frontend 
+root      1875 32096  0 17:43 pts/6    00:00:00 <span class="nb">grep</span> <span class="nt">--color</span><span class="o">=</span>auto frontend
+root      3020     1  0 Nov05 ?        00:00:23 ./frontend
+   
+<span class="c"># 查看端口监听</span>
+<span class="nv">$ </span>netstat <span class="nt">-apn</span> | <span class="nb">grep</span> :30103
+tcp        0      0 127.0.0.1:30103     0.0.0.0:<span class="k">*</span>               LISTEN      3020/frontend
+</code></pre></div>    </div>
+  </li>
+  <li>浏览器访问前端页面 http://127.0.0.1:30103，查看服务中心实例（出现以下页面即为成功）<br />
+<img src="/assets/images/docs/service-center/service-center.jpg" alt="1" /><br />
+<strong><em>注：</em></strong>
+    <ul>
+      <li>若 frontend 服务不是本地启动，则无法通过 http://127.0.0.1:30103 访问；需要修改配置文件中”frontend_host_ip”为主机IP，并使用 http://{ip}:30103 的形式进行访问</li>
+      <li>若 Service-Center 需要对外提供服务，需要修改”httpaddr”，外部应用使用 http://{ip}:30100 进行访问<br />
+如图：<br />
+<img src="/assets/images/docs/service-center/config-host-ip.jpg" alt="1" /></li>
+    </ul>
+  </li>
+</ol>
+
+<h2 id="docker镜像启动">Docker镜像启动</h2>
+<ol>
+  <li>下载并运行镜像
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 下载镜像</span>
+<span class="nv">$ </span>docker pull servicecomb/service-center
+<span class="c"># 启动容器</span>
+<span class="nv">$ </span>docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center
+</code></pre></div>    </div>
+  </li>
+  <li>查看镜像状态和监听端口
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 查看端口监听</span>
+<span class="nv">$ </span>docker ps | <span class="nb">grep </span>service-center
+0733021cd96d        servicecomb/service-center        <span class="s2">"/opt/service-cent..."</span>   3 minutes ago       Up 3 minutes        0.0.0.0:30100-&gt;30100/tcp        gallant_varahamihira 
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="kubernetes-部署">Kubernetes 部署</h2>
+<ol>
+  <li>配置部署脚本
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cat</span> <span class="o">&lt;&lt;</span><span class="no">EOF</span><span class="sh"> &gt;&gt; ./service-center.yaml
+   apiVersion: v1
+   kind: Service
+   metadata:
+     name: servicecenter
+     labels:
+       app: servicecenter
+   spec:
+     ports:
+     - port: 30100
+       name: http
+     selector:
+       app: servicecenter
+   ---
+   apiVersion: extensions/v1beta1
+   kind: Deployment
+   metadata:
+     name: servicecenter
+   spec:
+     replicas: 1
+     template:
+       metadata:
+         labels:
+           app: servicecenter
+           version: v1
+       spec:
+         containers:
+         - name: servicecenter
+           image: servicecomb/service-center:latest
+           imagePullPolicy: IfNotPresent
+           ports:
+           - containerPort: 30100 
+</span><span class="no">EOF
+</span></code></pre></div>    </div>
+  </li>
+  <li>Kubernetes中部署
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 创建 namespace "servicecomb"</span>
+<span class="nv">$ </span>kubectl create namespace servicecomb
+   
+<span class="c"># 部署 service-center</span>
+<span class="nv">$ </span>kubectl <span class="nt">-n</span> servicecomb create <span class="nt">-f</span> service-center.yaml
+</code></pre></div>    </div>
+  </li>
+  <li>查看Pod状态和service端口
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 查看 pod 启动状态</span>
+<span class="nv">$ </span>kubectl <span class="nt">-n</span> servicecomb get pod
+NAME                             READY   STATUS    RESTARTS   AGE
+servicecenter-7d964b7644-h6f4s   1/1     Running   0          72s
+   
+<span class="c"># 获取 service 监听</span>
+<span class="nv">$ </span>kubectl <span class="nt">-n</span> servicecomb get service
+NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT<span class="o">(</span>S<span class="o">)</span>     AGE
+servicecenter   ClusterIP   10.104.241.163   &lt;none&gt;        30100/TCP   118s
+   
+<span class="nv">$ </span>curl http://10.104.241.163:30100
+...
+</code></pre></div>    </div>
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content/cn/docs/service-center/registration-discovery/index.html

diff --git a/content/cn/docs/service-center/registration-discovery/index.html b/content/cn/docs/service-center/registration-discovery/index.html
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+    <meta itemprop="headline" content="服务注册发现">
+    <meta itemprop="description" content="服务中心注册发现">
+    
+    <meta itemprop="dateModified" content="November 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务注册发现
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#服务注册发现" id="markdown-toc-服务注册发现">服务注册发现</a></li>
+  <li><a href="#注册发现流程" id="markdown-toc-注册发现流程">注册发现流程</a></li>
+  <li><a href="#注册发现初窥" id="markdown-toc-注册发现初窥">注册发现初窥</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="服务注册发现">服务注册发现</h2>
+<p>在微服务架构中，一个应用由一组职责单一化的服务组成，各个服务被动态的部署到不同的节点。面对这样一组服务，应该如何去管理服务之间的依赖关系呢？ 
+   <img src="/assets/images/docs/service-center/service-center-why.png" alt="1" /> <br />
+   服务注册中心的出现正是为了解决这样的问题，它提供的注册机制，允许服务提供者将自己的信息登记到中心；提供的发现机制，供服务消费者从中心查找服务提供者信息。
+   服务注册中心有以下几个优点：</p>
+<ul>
+  <li>1 解耦服务提供者与服务消费者，服务消费者不需要硬编码服务提供者地址；</li>
+  <li>2 服务动态发现及可伸缩能力，服务提供者实例的动态增减能通过注册中心动态推送到服务消费者端；</li>
+  <li>3 通过注册中心可以动态的监控服务运行质量及服务依赖，为服务提供服务治理能力。</li>
+</ul>
+
+<h2 id="注册发现流程">注册发现流程</h2>
+<p><img src="/assets/images/docs/service-center/registration&amp;discovery.png" alt="1" /><br />
+   如上图，Service-Center中服务发现流程大致有以下几个步骤：</p>
+<ul>
+  <li>1 服务提供者向Service-Center注册服务信息</li>
+  <li>2 服务提供者发送心跳，维持在Service-Center中的“UP”状态</li>
+  <li>3 服务消费者向Service-Center注册服务信息</li>
+  <li>4 服务消费者从Service-Center发现服务提供者信息</li>
+  <li>5 服务消费者向服务提供者发送请求，并获取通讯结果</li>
+</ul>
+
+<p>Service-Center注册发现接口基于RESTful标准实现，不受开发语言限制，接口定义请参考<a href="https://rawcdn.githack.com/ServiceComb/service-center/master/docs/api-docs.html">官方API文档</a></p>
+
+<h2 id="注册发现初窥">注册发现初窥</h2>
+<p>以下将通过 curl 命令模拟 Service-center 中的服务注册与发现，以便于了解其流程。</p>
+<ol>
+  <li>provider 服务注册
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://127.0.0.1:30100/registry/v3/microservices <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "service":
+  {
+    "appId": "default",
+    "serviceName": "ProviderDemoService",
+    "version":"1.0.0"
+  }
+}'</span>
+<span class="o">{</span><span class="s2">"serviceId"</span>:<span class="s2">"fa82132706a6b75a13393d8cf48800f9689b2603"</span><span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>provider 实例注册<br />
+根据上一步返回的的 serviceId，注册微服务实例
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://127.0.0.1:30100/registry/v3/microservices/fa82132706a6b75a13393d8cf48800f9689b2603/instances <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "instance": 
+  {
+      "hostName":"provider-demo",
+      "endpoints": [
+          "rest://127.0.0.1:8080"
+      ]
+  }
+}'</span>
+<span class="o">{</span><span class="s2">"instanceId"</span>:<span class="s2">"6e160fb0196e11e9b8b50242ac110005"</span><span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>consumer 服务注册
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://127.0.0.1:30100/registry/v3/microservices <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "service":
+  {
+    "appId": "default",
+    "serviceName": "ConsumerDemoService",
+    "version":"1.0.0"
+  }
+}'</span>
+<span class="o">{</span><span class="s2">"serviceId"</span>:<span class="s2">"d08d29edbeaa372c5be88407aa9adb00b4cb6099"</span><span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>服务发现<br />
+根据 provider 服务名称和版本规则、以及 consumer 服务 ID 进行 provider 服务实例发现
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> GET <span class="se">\</span>
+<span class="s1">'http://127.0.0.1:30100/registry/v3/instances?appId=default&amp;serviceName=ProviderDemoService&amp;version=latest'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-consumerid: d08d29edbeaa372c5be88407aa9adb00b4cb6099'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span>
+<span class="o">{</span>
+  <span class="s2">"instances"</span>: <span class="o">[</span>
+    <span class="o">{</span>
+      <span class="s2">"instanceId"</span>: <span class="s2">"c23da577197111e9b8b50242ac110005"</span>,
+      <span class="s2">"serviceId"</span>: <span class="s2">"fa82132706a6b75a13393d8cf48800f9689b2603"</span>,
+      <span class="s2">"endpoints"</span>: <span class="o">[</span>
+        <span class="s2">"rest://127.0.0.1:8080"</span>
+      <span class="o">]</span>,
+      <span class="s2">"hostName"</span>: <span class="s2">"provider-demo"</span>,
+      <span class="s2">"status"</span>: <span class="s2">"UP"</span>,
+      <span class="s2">"healthCheck"</span>: <span class="o">{</span>
+        <span class="s2">"mode"</span>: <span class="s2">"push"</span>,
+        <span class="s2">"interval"</span>: 30,
+        <span class="s2">"times"</span>: 3
+      <span class="o">}</span>,
+      <span class="s2">"timestamp"</span>: <span class="s2">"1547631199"</span>,
+      <span class="s2">"modTimestamp"</span>: <span class="s2">"1547631199"</span>,
+      <span class="s2">"version"</span>: <span class="s2">"1.0.0"</span>
+    <span class="o">}</span>
+  <span class="o">]</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
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+    <meta itemprop="description" content="本篇将介绍如何使用 ServiceComb Pack 集群以及实现原理">
+    <meta itemprop="datePublished" content="April 03, 2019">
+    <meta itemprop="dateModified" content="April 11, 2019">
+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack 0.4.0 Cluster : 集群实现
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Alpha可以通过扩展部署多个实例实现高可用部署，并且通过在节点上设置启动参数 <code class="highlighter-rouge">alpha.event.scanner.enabled=false</code> 关闭一些节点后台定时执行的事务扫描，避免多个节点同时扫描事物表可能导致的性能问题。但是当启动事务扫描的进程宕机后会导致没有进程进行事务扫描，从而无法进行超时事务补偿。
+在0.4.0版本中，我们通过一种基于数据库表的抢占锁机制，实现Alpha集群中主节点的动态选举，并让事务扫描方法只在主节点上执行。当主节点宕机后其他节点通过抢占的方式选出一个新的主节点，本文将介绍在0.4.0版本相关的代码实现。</p>
+
+<h2 id="快速体验">快速体验</h2>
+
+<p>在0.4.0版本中开启动态主节点集群模式支持只需要增加启动参数 <code class="highlighter-rouge">alpha.cluster.master.enabled=true</code></p>
+
+<ul>
+  <li>启动两个节点</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-SNAPSHOT-exec.jar <span class="se">\</span>
+  <span class="nt">--server</span>.port<span class="o">=</span>8090 <span class="se">\</span>
+  <span class="nt">--alpha</span>.server.port<span class="o">=</span>8080 <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+  <span class="nt">--alpha</span>.cluster.master.enabled<span class="o">=</span><span class="nb">true</span>
+</code></pre></div></div>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-SNAPSHOT-exec.jar <span class="se">\</span>
+  <span class="nt">--server</span>.port<span class="o">=</span>8091 <span class="se">\</span>
+  <span class="nt">--alpha</span>.server.port<span class="o">=</span>8081 <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+  <span class="nt">--alpha</span>.cluster.master.enabled<span class="o">=</span><span class="nb">true</span>
+</code></pre></div></div>
+
+<ul>
+  <li>节点类型信息查看</li>
+</ul>
+
+<p>在日志中看到 <code class="highlighter-rouge">Master Node</code> 则表示这个进程是主节点</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>01:31:07.032 <span class="o">[</span>pool-3-thread-1] INFO  org.apache.servicecomb.pack.alpha.server.cluster.master.ClusterLockService - Master Node 
+</code></pre></div></div>
+
+<p>在日志中看到 <code class="highlighter-rouge">Slave Node</code> 则表示这个进程是从节点</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>01:31:31.059 <span class="o">[</span>pool-3-thread-1] INFO  org.apache.servicecomb.pack.alpha.server.cluster.master.ClusterLockService - Slave Node
+</code></pre></div></div>
+
+<ul>
+  <li>节点切换</li>
+</ul>
+
+<p>当主节点进程宕后，其他从节点会采用抢占的产生一个新的主节点</p>
+
+<h2 id="让事务扫描运行在主节点">让事务扫描运行在主节点</h2>
+
+<p>事务扫描是通过 <code class="highlighter-rouge">EventScanner.java</code> 实现的，并且在 <code class="highlighter-rouge">AlphaConfig.java</code> 中进行初始化，可以看到在 <code class="highlighter-rouge">new EventScanner</code> 代码执行前进行了eventScannerEnabled判断，这个参数就是通过<code class="highlighter-rouge">alpha.event.scanner.enabled</code> 指定的（默认是true），然后传入了<code class="highlighter-rouge">nodeStatus</code> 对象，这个对象就记录着这个节点的状态（主节点或者从节点），后边会讲解 <code class="highlighter-rouge">nodeStatus</code> 是如何构造的。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Bean</span>
+<span class="nc">TxConsistentService</span> <span class="nf">txConsistentService</span><span class="o">(</span>
+  <span class="nd">@Value</span><span class="o">(</span><span class="s">"${alpha.event.pollingInterval:500}"</span><span class="o">)</span> <span class="kt">int</span> <span class="n">eventPollingInterval</span><span class="o">,</span>
+  <span class="nd">@Value</span><span class="o">(</span><span class="s">"${alpha.event.scanner.enabled:true}"</span><span class="o">)</span> <span class="kt">boolean</span> <span class="n">eventScannerEnabled</span><span class="o">,</span>
+  <span class="nc">ScheduledExecutorService</span> <span class="n">scheduler</span><span class="o">,</span>
+  <span class="nc">TxEventRepository</span> <span class="n">eventRepository</span><span class="o">,</span>
+  <span class="nc">CommandRepository</span> <span class="n">commandRepository</span><span class="o">,</span>
+  <span class="nc">TxTimeoutRepository</span> <span class="n">timeoutRepository</span><span class="o">,</span>
+  <span class="nc">OmegaCallback</span> <span class="n">omegaCallback</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">eventScannerEnabled</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">new</span> <span class="nf">EventScanner</span><span class="o">(</span><span class="n">scheduler</span><span class="o">,</span>
+          <span class="n">eventRepository</span><span class="o">,</span> <span class="n">commandRepository</span><span class="o">,</span> <span class="n">timeoutRepository</span><span class="o">,</span>
+          <span class="n">omegaCallback</span><span class="o">,</span> <span class="n">eventPollingInterval</span><span class="o">,</span> <span class="n">nodeStatus</span><span class="o">).</span><span class="na">run</span><span class="o">();</span>
+      <span class="no">LOG</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Starting the EventScanner."</span><span class="o">);</span>
+      <span class="o">}</span>
+    <span class="nc">TxConsistentService</span> <span class="n">consistentService</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">TxConsistentService</span><span class="o">(</span><span class="n">eventRepository</span><span class="o">);</span>
+    <span class="k">return</span> <span class="n">consistentService</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">EventScanner.java</code> 的 pollEvents 方法进行定时事务扫描，并使用 <code class="highlighter-rouge">nodeStatus.isMaster()</code> 判断自己是否是主节点，只有主节点才允许执行。看到这里大家应该知道 <code class="highlighter-rouge">nodeStatus.isMaster()</code> 是我们判断主节点的关键对象，那么 <code class="highlighter-rouge">NodeStatus.java</code> 是如何被创建并初始化的呢</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">private</span> <span class="kt">void</span> <span class="nf">pollEvents</span><span class="o">()</span> <span class="o">{</span>
+	<span class="n">scheduler</span><span class="o">.</span><span class="na">scheduleWithFixedDelay</span><span class="o">(</span>
+	    <span class="o">()</span> <span class="o">-&gt;</span> <span class="o">{</span>
+	      <span class="c1">// only pull the events when working in the master mode</span>
+	      <span class="k">if</span><span class="o">(</span><span class="n">nodeStatus</span><span class="o">.</span><span class="na">isMaster</span><span class="o">()){</span>
+	        <span class="n">updateTimeoutStatus</span><span class="o">();</span>
+	        <span class="n">findTimeoutEvents</span><span class="o">();</span>
+	        <span class="n">abortTimeoutEvents</span><span class="o">();</span>
+	        <span class="n">saveUncompensatedEventsToCommands</span><span class="o">();</span>
+	        <span class="n">compensate</span><span class="o">();</span>
+	        <span class="n">updateCompensatedCommands</span><span class="o">();</span>
+	        <span class="n">deleteDuplicateSagaEndedEvents</span><span class="o">();</span>
+	        <span class="n">updateTransactionStatus</span><span class="o">();</span>
+	      <span class="o">}</span>
+	    <span class="o">},</span>
+	    <span class="mi">0</span><span class="o">,</span>
+	    <span class="n">eventPollingInterval</span><span class="o">,</span>
+	    <span class="no">MILLISECONDS</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>我们在 <code class="highlighter-rouge">AlphaConfig.java</code>  中通过以下方式创建实例，以确保无论您是否指定了 <code class="highlighter-rouge">alpha.cluster.master.enabled</code> 参数事务扫描都可以正常工作，在这里可以看到当我们开启了集群模式后节点刚启动的时候状态是Slave，下面会说明状态是如何切换到Master的。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Bean</span>
+<span class="nc">NodeStatus</span> <span class="nf">nodeStatus</span> <span class="o">(){</span>
+<span class="k">if</span><span class="o">(</span><span class="n">masterEnabled</span><span class="o">){</span>
+  <span class="k">return</span> <span class="k">new</span> <span class="nf">NodeStatus</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">SLAVE</span><span class="o">);</span>
+<span class="o">}</span><span class="k">else</span><span class="o">{</span>
+  <span class="k">return</span> <span class="k">new</span> <span class="nf">NodeStatus</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">MASTER</span><span class="o">);</span>
+<span class="o">}</span>
+<span class="o">}</span>
+
+<span class="nd">@Autowired</span>
+<span class="nc">NodeStatus</span> <span class="n">nodeStatus</span><span class="o">;</span>
+</code></pre></div></div>
+
+<p>控制节点状态切换的是 <code class="highlighter-rouge">ClusterLockService.java</code> ,这个服务会定时执行锁抢占，抢占成功后设置本节点为Master，否则为Slave</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Autowired</span>
+<span class="nc">LockProvider</span> <span class="n">lockProvider</span><span class="o">;</span>
+<span class="o">...</span>
+<span class="o">...</span>
+<span class="nd">@Scheduled</span><span class="o">(</span><span class="n">cron</span> <span class="o">=</span> <span class="s">"0/1 * * * * ?"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kt">void</span> <span class="nf">masterCheck</span><span class="o">()</span> <span class="o">{</span>
+<span class="k">if</span> <span class="o">(</span><span class="n">applicationReady</span><span class="o">)</span> <span class="o">{</span>
+  <span class="k">this</span><span class="o">.</span><span class="na">locker</span> <span class="o">=</span> <span class="n">lockProvider</span><span class="o">.</span><span class="na">lock</span><span class="o">(</span><span class="k">this</span><span class="o">.</span><span class="na">getMasterLock</span><span class="o">());</span>
+  <span class="k">if</span> <span class="o">(</span><span class="k">this</span><span class="o">.</span><span class="na">locker</span><span class="o">.</span><span class="na">isPresent</span><span class="o">())</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(!</span><span class="k">this</span><span class="o">.</span><span class="na">locked</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">this</span><span class="o">.</span><span class="na">locked</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
+      <span class="n">nodeStatus</span><span class="o">.</span><span class="na">setTypeEnum</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">MASTER</span><span class="o">);</span>
+      <span class="no">LOG</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Master Node"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="c1">//Keep locked</span>
+  <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="k">this</span><span class="o">.</span><span class="na">locked</span> <span class="o">||</span> <span class="o">!</span><span class="n">lockExecuted</span><span class="o">)</span> <span class="o">{</span>
+      <span class="n">locked</span> <span class="o">=</span> <span class="kc">false</span><span class="o">;</span>
+      <span class="n">nodeStatus</span><span class="o">.</span><span class="na">setTypeEnum</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">SLAVE</span><span class="o">);</span>
+      <span class="no">LOG</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Slave Node"</span><span class="o">);</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+  <span class="n">lockExecuted</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
+<span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="加锁服务基础类">加锁服务基础类</h2>
+
+<p>在前边的说明中可以看到，在 <code class="highlighter-rouge">ClusterLockService.java</code> 的 <code class="highlighter-rouge">masterCheck</code> 方法中通过 <code class="highlighter-rouge">this.locker = lockProvider.lock(this.getMasterLock());</code> 获取一个锁并判断是否锁成功。</p>
+
+<p><code class="highlighter-rouge">LockProvider.java</code> 是一个接口，目前我们提供了基于 JDBC 的实现，包结构以及类依赖关系如下：</p>
+
+<p><img src="/assets/images/2019-04-03-servicecomb-pack-cluster/cluster-package-structure.png" alt="cluster-package-structure" /></p>
+
+<p>依赖关系如下</p>
+
+<p><img src="/assets/images/2019-04-03-servicecomb-pack-cluster/class-dependency-1.png" alt="class-dependency-1" /></p>
+
+<ul>
+  <li>
+    <p>LockProvider.java</p>
+
+    <p>接口定义了锁方法 lock</p>
+  </li>
+  <li>
+    <p>LockProviderPersistence.java</p>
+
+    <p>接口定义了以下三个方法，作为持久化锁的接口</p>
+
+    <ul>
+      <li>initLock 创建锁，尝试进行锁定并返回锁定是否成功</li>
+      <li>updateLock 更新锁，进行再次锁定并返回是否成功（更新锁的接口设计的目的是为了非长连接锁设计，例如对于按照固定周期进行加锁的实现）</li>
+      <li>unLock 解锁，取消锁定</li>
+    </ul>
+  </li>
+  <li>
+    <p>AbstractLockProvider.java</p>
+
+    <p>抽象类实现了 <code class="highlighter-rouge">LockProvider.java</code> 接口的lock方法，并调用内部的 <code class="highlighter-rouge">LockProviderPersistence.java</code> 接口进行锁操作</p>
+  </li>
+</ul>
+
+<h2 id="加锁服务-jdbc-实现">加锁服务 JDBC 实现</h2>
+
+<blockquote>
+  <p>我喜欢和你们一起跑步，一致的步伐，一样的心跳，这感觉真好，当你掉队了，我带着大家跑</p>
+</blockquote>
+
+<ul>
+  <li>JDBC 类关系图</li>
+</ul>
+
+<p><img src="/assets/images/2019-04-03-servicecomb-pack-cluster/class-dependency-2.png" alt="class-dependency-2" /></p>
+
+<ul>
+  <li>
+    <p>JdbcLockPersistence.java</p>
+
+    <p><code class="highlighter-rouge">LockProviderPersistence.java</code> 接口实现，用来实现对数据库表操作</p>
+  </li>
+  <li>
+    <p>JdbcLockProvider.java</p>
+
+    <p>继承抽象类 <code class="highlighter-rouge">AbstractLockProvider.java</code> ，在构造函数中传入 ``LockProviderPersistence.java<code class="highlighter-rouge"> 的接口实现  </code>JdbcLockPersistence`</p>
+  </li>
+  <li>
+    <p>LockProviderJdbcConfiguration.java</p>
+
+    <p>锁的JDBC实例构造类</p>
+  </li>
+  <li>
+    <p>JPA</p>
+
+    <p>MasterLockEntityRepository.java、SpringMasterLockRepository.java、org.apache.servicecomb.pack.alpha.server.cluster.master.provider.jdbc.jpa.*</p>
+  </li>
+  <li>
+    <p>锁定表结构设计</p>
+  </li>
+</ul>
+
+<div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="n">IF</span> <span class="k">NOT</span> <span class="k">EXISTS</span> <span class="n">master_lock</span> <span class="p">(</span>
+  <span class="n">serviceName</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">36</span><span class="p">)</span> <span class="k">not</span> <span class="k">NULL</span><span class="p">,</span>
+  <span class="n">expireTime</span> <span class="nb">datetime</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="k">DEFAULT</span> <span class="k">CURRENT_TIMESTAMP</span><span class="p">,</span>
+  <span class="n">lockedTime</span> <span class="nb">datetime</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="k">DEFAULT</span> <span class="k">CURRENT_TIMESTAMP</span><span class="p">,</span>
+  <span class="n">instanceId</span>  <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">not</span> <span class="k">NULL</span><span class="p">,</span>
+  <span class="k">PRIMARY</span> <span class="k">KEY</span> <span class="p">(</span><span class="n">serviceName</span><span class="p">)</span>
+<span class="p">)</span> <span class="n">ENGINE</span><span class="o">=</span><span class="n">InnoDB</span> <span class="k">DEFAULT</span> <span class="n">CHARSET</span><span class="o">=</span><span class="n">utf8</span><span class="p">;</span>
+</code></pre></div></div>
+
+<ul>
+  <li>serviceName 服务名，这个字段取值  <code class="highlighter-rouge">${spring.application.name}</code></li>
+  <li>expireTime 锁定过期时间，这个字段取值 lockedTime+5s</li>
+  <li>lockedTime 最近一次锁定时间</li>
+  <li>instanceId 集群实例ID，这个字段取值 <code class="highlighter-rouge">${alpha.server.host}]:${alpha.server.port}</code></li>
+</ul>
+
+<h2 id="加锁过程">加锁过程</h2>
+
+<p>加锁/更新锁的过程是一个周期性重复执行的动作，步骤如下：</p>
+
+<ul>
+  <li>
+    <p><code class="highlighter-rouge">ClusterLockService.java</code> 服务中会每秒调用一次 <code class="highlighter-rouge">LockProvider.java</code> 接口的lock方法</p>
+  </li>
+  <li>
+    <p><code class="highlighter-rouge">AbstractLockProvider.java</code> 抽象类中的 lock方法会尝试调用 <code class="highlighter-rouge">JdbcLockPersistence.java</code> 的 iniLock方法进行加锁，加锁的SQL实现定义在 <code class="highlighter-rouge">MasterLockEntityRepository.java</code> 中</p>
+
+    <ul>
+      <li>如果表为空，那么插入一条记录并返回加锁成功</li>
+      <li>如果表中存在serviceName字段相同的记录，则捕获异常加锁失败</li>
+    </ul>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="nd">@Transactional</span>
+   <span class="nd">@Modifying</span>
+   <span class="nd">@Query</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"INSERT INTO master_lock "</span>
+       <span class="o">+</span> <span class="s">"(serviceName, expireTime, lockedTime, instanceId) "</span>
+       <span class="o">+</span> <span class="s">"VALUES "</span>
+       <span class="o">+</span> <span class="s">"(?1, ?2, ?3, ?4)"</span><span class="o">,</span> <span class="n">nativeQuery</span> <span class="o">=</span> <span class="kc">true</span><span class="o">)</span>
+   <span class="kt">int</span> <span class="nf">initLock</span><span class="o">(</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"serviceName"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"expireTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">expireTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"lockedTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">lockedTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"instanceId"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">instanceId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>如果 initLock加锁失败，则尝试调用 <code class="highlighter-rouge">MasterLockEntityRepository.java</code> 中的 updateLock 方法尝试更新锁</p>
+
+    <ul>
+      <li>表中存在的本服务记录 instanceId 与本实例 instanceId 相同，则更新成功并返回加锁成功（这个表明上一个更新周期也是本服务更新的）</li>
+      <li>表中存在的本服务记录 expireTime 小于当前锁定时间 ，则更新成功并返回加锁成功（表示上一个锁定周期并没有实例进行锁定更新操作）</li>
+    </ul>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="nd">@Transactional</span>
+   <span class="nd">@Modifying</span><span class="o">(</span><span class="n">clearAutomatically</span> <span class="o">=</span> <span class="kc">true</span><span class="o">)</span>
+   <span class="nd">@Query</span><span class="o">(</span><span class="s">"UPDATE org.apache.servicecomb.pack.alpha.server.cluster.master.provider.jdbc.jpa.MasterLock t "</span>
+       <span class="o">+</span> <span class="s">"SET t.expireTime = :expireTime"</span>
+       <span class="o">+</span> <span class="s">",t.lockedTime = :lockedTime "</span>
+       <span class="o">+</span> <span class="s">",t.instanceId = :instanceId "</span>
+       <span class="o">+</span> <span class="s">"WHERE t.serviceName = :serviceName AND (t.expireTime &lt;= :lockedTime OR t.instanceId = :instanceId)"</span><span class="o">)</span>
+   <span class="kt">int</span> <span class="nf">updateLock</span><span class="o">(</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"serviceName"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"lockedTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">lockedTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"expireTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">expireTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"instanceId"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">instanceId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>释放锁 unLock</p>
+
+    <p>保留接口，用于扩展其他锁定方式</p>
+  </li>
+</ul>
+
+<h2 id="锁的其他实现">锁的其他实现</h2>
+
+<p>可以通过 <code class="highlighter-rouge">LockProvider.java</code> 和 <code class="highlighter-rouge">LockProviderPersistence.java</code> 接口实现其他方式的锁，例如zookeeper，redis等</p>
+
+<h2 id="注意">注意</h2>
+
+<ul>
+  <li>
+    <p>基于数据库表的方式需要集群中多个节点的服务器时钟同步</p>
+  </li>
+  <li>
+    <p>基于 MySQL 数据库时需要配置正确的时区，例如：<code class="highlighter-rouge">serverTimezone=GMT%2b8</code></p>
+  </li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
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+    <strong><i class="fa fa-fw fa-tags" aria-hidden="true"></i> 标签: </strong>
+    <span itemprop="keywords">
+    
+      
+      
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+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> 最新的:</strong> <time datetime="2019-04-11">2019年4月11日</time></p>
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+    <meta itemprop="description" content="ServiceComb Pack 集成发现服务 Consul">
+    <meta itemprop="datePublished" content="April 12, 2019">
+    <meta itemprop="dateModified" content="April 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack 0.4.0 集成发现服务 : Consul
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>ServiceComb Pack 从 0.4.0 版本开始支持将 Alpha 服务实例注册到发现服务 Consul 中，Omega 端的程序通过注册中心 Consul 就可以连接 Alpha 服务</p>
+
+<h3 id="启动-consul">启动 Consul</h3>
+
+<ul>
+  <li>使用 Docker 启动 Consul，更多方式请参考官方网站 <a href="https://www.consul.io">https://www.consul.io</a></li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 8500:8500 consul
+</code></pre></div></div>
+
+<ul>
+  <li>访问 Consul UI</li>
+</ul>
+
+<p>在浏览器中访问 http://0.0.0.0:8500  ，能看到如下页面表示 Consul 启动成功</p>
+
+<p><img src="/assets/images/2019-04-12-servicecomb-pack-consul/consul_main.png" alt="consul_main" /></p>
+
+<h3 id="启动-alpha">启动 Alpha</h3>
+
+<p>注册中心功能通过设置 <code class="highlighter-rouge">spring.cloud.consul.enabled=true</code> 参数开启</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-exec.jar <span class="se">\</span>
+  <span class="nt">--server</span>.port<span class="o">=</span>8090 <span class="se">\</span>
+  <span class="nt">--alpha</span>.server.port<span class="o">=</span>8080 <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+  <span class="nt">--spring</span>.cloud.consul.enabled<span class="o">=</span><span class="nb">true</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.cloud.consul.host<span class="o">=</span>0.0.0.0 <span class="se">\</span>
+  <span class="nt">--spring</span>.cloud.consul.port<span class="o">=</span>8500 <span class="se">\</span>
+  <span class="nt">--spring</span>.profiles.active<span class="o">=</span>prd 
+</code></pre></div></div>
+<p><strong>注意:</strong> 更多 Consul 参数请参考 <a href="https://cloud.spring.io/spring-cloud-consul/spring-cloud-consul.html">Spring Cloud Consul 2.x</a> <a href="https://cloud.spring.io/spring-cloud-consul/1.3.x/single/spring-cloud-consul.html">Spring Cloud Consul 1.x</a></p>
+
+<p>Alpha 启动完毕后可以看到已经注册到 Consul</p>
+
+<p><img src="/assets/images/2019-04-12-servicecomb-pack-consul/alpha_register_to_consul.png" alt="alpha_register_to_consul" /></p>
+
+<p>执行命令行 <code class="highlighter-rouge">curl http://0.0.0.0:8500/v1/agent/services</code> 可以看到已经将 Alpha 的 gRPC 地址和端口注册到 Consul 的 Tags 中</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+    </span><span class="nl">"servicecomb-alpha-server-0-0-0-0-336b06581fb5b92ed91c7ade3fdafa88"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+        </span><span class="nl">"ID"</span><span class="p">:</span><span class="w"> </span><span class="s2">"servicecomb-alpha-server-0-0-0-0-336b06581fb5b92ed91c7ade3fdafa88"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Service"</span><span class="p">:</span><span class="w"> </span><span class="s2">"servicecomb-alpha-server"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Tags"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+            </span><span class="s2">"alpha-server-host=0.0.0.0"</span><span class="p">,</span><span class="w">
+            </span><span class="s2">"alpha-server-port=8080"</span><span class="p">,</span><span class="w">
+            </span><span class="s2">"secure=false"</span><span class="w">
+        </span><span class="p">],</span><span class="w">
+        </span><span class="nl">"Meta"</span><span class="p">:</span><span class="w"> </span><span class="p">{},</span><span class="w">
+        </span><span class="nl">"Port"</span><span class="p">:</span><span class="w"> </span><span class="mi">8090</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"192.168.1.116"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Weights"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"Passing"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"Warning"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="w">
+        </span><span class="p">},</span><span class="w">
+        </span><span class="nl">"EnableTagOverride"</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="w">
+    </span><span class="p">}</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<h3 id="配置-omega-端">配置 Omega 端</h3>
+
+<blockquote>
+  <p>ServiceComb Pack 0.4.0 Omega 默认依赖 Spring Boot 2.x Spring 和 Cloud Consul 2.x ，如果你的 Omega 端项目依赖 Spring Boot 1.x 你可以使用 <code class="highlighter-rouge">-Pspring-boot-1</code> 参数重新编译 Spring Boot 1.x 和 Spring Cloud Consul 1.x 的版本</p>
+</blockquote>
+
+<p>修改原有 omega 端项目</p>
+
+<p>增加以下依赖</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+	<span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.pack<span class="nt">&lt;/groupId&gt;</span>
+	<span class="nt">&lt;artifactId&gt;</span>omega-spring-cloud-consul-starter<span class="nt">&lt;/artifactId&gt;</span>
+	<span class="nt">&lt;version&gt;</span>${pack.version}<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>在 <code class="highlighter-rouge">application.yaml</code> 添加下面的配置项</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spring</span><span class="pi">:</span>
+  <span class="na">cloud</span><span class="pi">:</span>
+    <span class="na">consul</span><span class="pi">:</span>
+      <span class="na">discovery</span><span class="pi">:</span>
+<span class="err">      	</span><span class="na">register</span><span class="pi">:</span> <span class="no">false</span>
+      <span class="s">host</span><span class="pi">:</span> <span class="s">0.0.0.0</span>
+      <span class="s">port</span><span class="pi">:</span> <span class="m">8500</span>
+      
+<span class="na">alpha</span><span class="pi">:</span>
+  <span class="na">cluster</span><span class="pi">:</span>
+    <span class="na">register</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">consul</span>
+</code></pre></div></div>
+
+<ul>
+  <li>
+    <p><code class="highlighter-rouge">spring.cloud.consul.host</code> 配置 Consul 注册中心的地址，<code class="highlighter-rouge">spring.cloud.consul.port</code> 配置 Consul 注册中心的端口，<code class="highlighter-rouge">spring.cloud.consul.discovery.register=false</code> 表示不注册自己到注册中心，更多 Consul 客户端配置可以参考<a href="https://cloud.spring.io/spring-cloud-consul/spring-cloud-consul.html">Spring Cloud Consul 2.x</a> <a href="https://cloud.spring.io/spring-cloud-consul/1.3.x/single/spring-cloud-consul.html">Spring Cloud Consul 1.x</a></p>
+  </li>
+  <li>
+    <p><code class="highlighter-rouge">alpha.cluster.register.type=consul</code> 配置 Omega 获取 Alpha 的方式是通过 Consul 的注册中心</p>
+  </li>
+  <li>
+    <p>spring boot 和 spring cloud 版本兼容</p>
+
+    <p>如果你的项目使用的不是spring boot 2.1.1版本，那么请参照此列表增加兼容的spring-cloud-starter-consul-discovery版本</p>
+
+    <table>
+      <thead>
+        <tr>
+          <th>spring boot</th>
+          <th>spring-cloud-starter-consul-discovery</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr>
+          <td>2.1.x.RELEASE</td>
+          <td>2.1.1.RELEASE</td>
+        </tr>
+        <tr>
+          <td>2.0.x.RELEASE</td>
+          <td>2.0.2.RELEASE</td>
+        </tr>
+      </tbody>
+    </table>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>     <span class="nt">&lt;dependencyManagement&gt;</span>
+       <span class="nt">&lt;dependencies&gt;</span>
+         <span class="nt">&lt;dependency&gt;</span>
+           <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>
+           <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-consul-discovery<span class="nt">&lt;/artifactId&gt;</span>
+           <span class="nt">&lt;version&gt;</span>2.0.2.RELEASE<span class="nt">&lt;/version&gt;</span>
+         <span class="nt">&lt;/dependency&gt;</span>
+       <span class="nt">&lt;/dependencies&gt;</span>
+     <span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka">
+    <meta itemprop="description" content="ServiceComb Pack 集成发现服务 Eureka">
+    <meta itemprop="datePublished" content="April 15, 2019">
+    <meta itemprop="dateModified" content="April 15, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>ServiceComb Pack 从 0.4.0 版本开始支持将 Alpha 服务实例注册到发现服务 Eureka 中，Omega 端的程序通过注册中心 Eureka 就可以连接 Alpha 服务</p>
+
+<h3 id="编译支持-eureka-的版本">编译支持 Eureka 的版本</h3>
+
+<p>默认发行版不包含 Eureka 的支持，你需要使用 <code class="highlighter-rouge">-Pspring-cloud-eureka</code> 参数编译支持 Eureka 的版本</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-pack.git
+<span class="nb">cd </span>servicecomb-pack
+mvn clean <span class="nb">install</span> <span class="nt">-DskipTests</span><span class="o">=</span><span class="nb">true</span> <span class="nt">-Pspring-boot-2</span>,spring-cloud-eureka
+</code></pre></div></div>
+
+<h3 id="启动-eureka">启动 Eureka</h3>
+
+<ul>
+  <li>使用 Docker 启动 Eureka，更多方式请参考官方网站 <a href="https://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html#spring-cloud-eureka-server">https://cloud.spring.io</a></li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 8761:8761 springcloud/eureka
+</code></pre></div></div>
+
+<ul>
+  <li>访问 Eureka UI</li>
+</ul>
+
+<p>在浏览器中访问 http://0.0.0.0:8761  ，能看到如下页面表示 Eureka 启动成功</p>
+
+<p><img src="/assets/images/2019-04-15-servicecomb-pack-eureka/eureka-main.png" alt="eureka_main" /></p>
+
+<h3 id="启动-alpha">启动 Alpha</h3>
+
+<p>注册中心功能通过设置  <code class="highlighter-rouge">eureka.client.enabled=true</code> 参数开启</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-exec.jar <span class="se">\</span>
+  <span class="nt">--server</span>.port<span class="o">=</span>8090 <span class="se">\</span>
+  <span class="nt">--alpha</span>.server.port<span class="o">=</span>8080 <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+  <span class="nt">--eureka</span>.client.enabled<span class="o">=</span><span class="nb">true</span> <span class="se">\</span>
+  <span class="nt">--eureka</span>.client.service-url.defaultZone<span class="o">=</span>http://0.0.0.0:8761/eureka <span class="se">\</span>
+  <span class="nt">--spring</span>.profiles.active<span class="o">=</span>prd 
+</code></pre></div></div>
+<p><strong>注意:</strong> 更多 eureka 参数请参考 <a href="https://cloud.spring.io/spring-cloud-netflix/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 2.x</a> <a href="https://cloud.spring.io/spring-cloud-netflix/1.4.x/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 1.x</a></p>
+
+<p>Alpha 启动完毕后可以看到已经注册到 Eureka</p>
+
+<p><img src="/assets/images/2019-04-15-servicecomb-pack-eureka/alpha_register_to_eureka.png" alt="alpha_register_to_eureka" /></p>
+
+<p>执行命令 <code class="highlighter-rouge">curl http://127.0.0.1:8761/eureka/apps/</code> 可以看到已经将 Alpha 的 gRPC 地址和端口注册到 Eureka 的 Metadata 中</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;applications&gt;</span>
+  <span class="nt">&lt;versions__delta&gt;</span>1<span class="nt">&lt;/versions__delta&gt;</span>
+  <span class="nt">&lt;apps__hashcode&gt;</span>UP_1_<span class="nt">&lt;/apps__hashcode&gt;</span>
+  <span class="nt">&lt;application&gt;</span>
+    <span class="nt">&lt;name&gt;</span>SERVICECOMB-ALPHA-SERVER<span class="nt">&lt;/name&gt;</span>
+    <span class="nt">&lt;instance&gt;</span>
+      <span class="nt">&lt;hostName&gt;</span>10.50.8.23<span class="nt">&lt;/hostName&gt;</span>
+      <span class="nt">&lt;app&gt;</span>SERVICECOMB-ALPHA-SERVER<span class="nt">&lt;/app&gt;</span>
+      <span class="nt">&lt;ipAddr&gt;</span>10.50.8.23<span class="nt">&lt;/ipAddr&gt;</span>
+      <span class="nt">&lt;status&gt;</span>UP<span class="nt">&lt;/status&gt;</span>
+      <span class="nt">&lt;overriddenstatus&gt;</span>UNKNOWN<span class="nt">&lt;/overriddenstatus&gt;</span>
+      <span class="nt">&lt;port</span> <span class="na">enabled=</span><span class="s">"true"</span><span class="nt">&gt;</span>8090<span class="nt">&lt;/port&gt;</span>
+      <span class="nt">&lt;securePort</span> <span class="na">enabled=</span><span class="s">"false"</span><span class="nt">&gt;</span>443<span class="nt">&lt;/securePort&gt;</span>
+      <span class="nt">&lt;countryId&gt;</span>1<span class="nt">&lt;/countryId&gt;</span>
+      <span class="nt">&lt;dataCenterInfo</span> <span class="na">class=</span><span class="s">"com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo"</span><span class="nt">&gt;</span>
+        <span class="nt">&lt;name&gt;</span>MyOwn<span class="nt">&lt;/name&gt;</span>
+      <span class="nt">&lt;/dataCenterInfo&gt;</span>
+      <span class="nt">&lt;leaseInfo&gt;</span>
+        <span class="nt">&lt;renewalIntervalInSecs&gt;</span>30<span class="nt">&lt;/renewalIntervalInSecs&gt;</span>
+        <span class="nt">&lt;durationInSecs&gt;</span>90<span class="nt">&lt;/durationInSecs&gt;</span>
+        <span class="nt">&lt;registrationTimestamp&gt;</span>1555317761365<span class="nt">&lt;/registrationTimestamp&gt;</span>
+        <span class="nt">&lt;lastRenewalTimestamp&gt;</span>1555317761365<span class="nt">&lt;/lastRenewalTimestamp&gt;</span>
+        <span class="nt">&lt;evictionTimestamp&gt;</span>0<span class="nt">&lt;/evictionTimestamp&gt;</span>
+        <span class="nt">&lt;serviceUpTimestamp&gt;</span>1555317761067<span class="nt">&lt;/serviceUpTimestamp&gt;</span>
+      <span class="nt">&lt;/leaseInfo&gt;</span>
+      <span class="nt">&lt;metadata&gt;</span>
+        <span class="nt">&lt;management.port&gt;</span>8090<span class="nt">&lt;/management.port&gt;</span>
+        <span class="nt">&lt;servicecomb-alpha-server&gt;</span>0.0.0.0:8080<span class="nt">&lt;/servicecomb-alpha-server&gt;</span>
+      <span class="nt">&lt;/metadata&gt;</span>
+      <span class="nt">&lt;homePageUrl&gt;</span>http://10.50.8.23:8090/<span class="nt">&lt;/homePageUrl&gt;</span>
+      <span class="nt">&lt;statusPageUrl&gt;</span>http://10.50.8.23:8090/actuator/info<span class="nt">&lt;/statusPageUrl&gt;</span>
+      <span class="nt">&lt;healthCheckUrl&gt;</span>http://10.50.8.23:8090/actuator/health<span class="nt">&lt;/healthCheckUrl&gt;</span>
+      <span class="nt">&lt;vipAddress&gt;</span>servicecomb-alpha-server<span class="nt">&lt;/vipAddress&gt;</span>
+      <span class="nt">&lt;secureVipAddress&gt;</span>servicecomb-alpha-server<span class="nt">&lt;/secureVipAddress&gt;</span>
+      <span class="nt">&lt;isCoordinatingDiscoveryServer&gt;</span>false<span class="nt">&lt;/isCoordinatingDiscoveryServer&gt;</span>
+      <span class="nt">&lt;lastUpdatedTimestamp&gt;</span>1555317761365<span class="nt">&lt;/lastUpdatedTimestamp&gt;</span>
+      <span class="nt">&lt;lastDirtyTimestamp&gt;</span>1555317760932<span class="nt">&lt;/lastDirtyTimestamp&gt;</span>
+      <span class="nt">&lt;actionType&gt;</span>ADDED<span class="nt">&lt;/actionType&gt;</span>
+    <span class="nt">&lt;/instance&gt;</span>
+  <span class="nt">&lt;/application&gt;</span>
+<span class="nt">&lt;/applications&gt;</span>
+</code></pre></div></div>
+
+<h3 id="配置-omega-端">配置 Omega 端</h3>
+
+<blockquote>
+  <p>ServiceComb Pack 0.4.0 Omega 默认依赖 Spring Boot 2.x Spring 和 Spring Cloud Netflix 2.x ，如果你的 Omega 端项目依赖 Spring Boot 1.x 你可以使用 <code class="highlighter-rouge">-Pspring-boot-1</code> 参数重新编译 Spring Boot 1.x 和 Spring Cloud Netflix 1.x 的版本</p>
+</blockquote>
+
+<p>修改原有 omega 端项目</p>
+
+<p>增加以下依赖</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.pack<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>omega-spring-cloud-eureka-starter<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>${pack.version}<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>在 <code class="highlighter-rouge">application.yaml</code> 添加下面的配置项</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">eureka</span><span class="pi">:</span>
+  <span class="na">client</span><span class="pi">:</span>
+    <span class="na">service-url</span><span class="pi">:</span>
+      <span class="na">defaultZone</span><span class="pi">:</span> <span class="s">http://127.0.0.1:8761/eureka</span>
+<span class="na">alpha</span><span class="pi">:</span>
+  <span class="na">cluster</span><span class="pi">:</span>
+    <span class="na">register</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">eureka</span>
+</code></pre></div></div>
+<ul>
+  <li>
+    <p><code class="highlighter-rouge">eureka.client.service-url.defaultZone</code> 配置 Eureka 注册中心的地址，更多 Eureka 客户端配置可以参考<a href="https://cloud.spring.io/spring-cloud-netflix/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 2.x</a> 或 <a href="https://cloud.spring.io/spring-cloud-netflix/1.4.x/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 1.x</a></p>
+  </li>
+  <li>
+    <p><code class="highlighter-rouge">alpha.cluster.register.type=eureka</code> 配置 Omega 获取Alpha的方式是通过 Eureka 的注册中心</p>
+  </li>
+  <li>
+    <p>spring boot 版本兼容</p>
+
+    <p>如果你的项目使用的不是 spring boot 2.1.1 版本，那么请参照此列表增加兼容的 spring-cloud-starter-consul-discovery 版本</p>
+
+    <table>
+      <thead>
+        <tr>
+          <th>spring boot</th>
+          <th>spring-cloud-starter-netflix-eureka-client</th>
+        </tr>
+      </thead>
+      <tbody>
+        <tr>
+          <td>2.1.x.RELEASE</td>
+          <td>2.1.1.RELEASE</td>
+        </tr>
+        <tr>
+          <td>2.0.x.RELEASE</td>
+          <td>2.0.3.RELEASE</td>
+        </tr>
+      </tbody>
+    </table>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-netflix-eureka-client<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>2.0.3.RELEASE<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+<span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div>    </div>
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content/cn/docs/servicecomb-springcloud-zuul-demo/index.html

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new file mode 100644
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+      
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+    
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+	    
+	      
+	        ServiceComb提供了一套关于服务注册，服务发现，服务配置以及管理功能的微服务框架
+	      
+	    
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+    
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统">
+    <meta itemprop="description" content="基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统">
+    <meta itemprop="datePublished" content="January 22, 2019">
+    <meta itemprop="dateModified" content="January 22, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>基于ServiceComb和Zuul实现微服务网关，如此一来用户只需要专注实现其业务需求。</p>
+
+<h3 id="场景">场景</h3>
+<p>本文将以一个简单的Hello服务演示网关的使用。Hello微服务提供一个hello/{name}接口，只要传递路径参数name就可以返回打招呼内容。接口返回结果通过网关将在浏览器界面显示</p>
+
+<p><img src="/assets/images/zuul/demo-theory.png" alt="在这里插入图片描述" /></p>
+
+<h3 id="技术准备">技术准备</h3>
+<p><a href="http://servicecomb.apache.org/cn/docs/quick-start/">ServiceComb</a> 作为后端微服务核心框架 <br />
+<a href="https://github.com/apache/servicecomb-service-center">ServiceCenter</a> 作为服务发现与注册中心<br />
+<a href="https://cloud.spring.io/spring-cloud-netflix/multi/multi__router_and_filter_zuul.html">SpringCloud Zuul</a> 组件做服务网关</p>
+
+<h3 id="环境准备">环境准备</h3>
+<p>以下环境为Windows 64位系统</p>
+<ul>
+  <li>
+    <p>安装git，详情可参考<a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git">git安装教程</a></p>
+  </li>
+  <li>
+    <p>安装JDK 1.8，详情可参考<a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html">JDK安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装Maven 3.x，详情可参考<a href="https://maven.apache.org/install.html">Maven安装教程</a></p>
+  </li>
+</ul>
+
+<p>ServiceCenter安装<br />
+下载地址：http://mirrors.hust.edu.cn/apache/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz
+下载后解压如下
+<img src="/assets/images/zuul/demo-dir.png" alt="在这里插入图片描述" /></p>
+
+<p>在该目录下双击service-center.exe即可启动，命令窗口中出现如下信息基本代表ServiceCenter启动成功，从这个信息也可以得知ServiceCenter监听的是30100端口，等下配置文件要用到。
+<img src="/assets/images/zuul/demo-servicecenter-console1.png" alt="在这里插入图片描述" /></p>
+
+<p>问题点： 有可能会有如下信息，这个一般是端口被占用，很可能你打开了两个ServiceCenter，都关闭后再打开就可以了。
+<img src="/assets/images/zuul/demo-servicecenter-console2.png" alt="在这里插入图片描述" /></p>
+
+<h3 id="示例">示例</h3>
+
+<h4 id="一--后端微服务-helloservice">一.  后端微服务 HelloService</h4>
+<h5 id="1-添加依赖">1. 添加依赖</h5>
+<p>新建maven项目HelloService，pom文件如下</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;project</span> <span class="na">xmlns=</span><span class="s">"http://maven.apache.org/POM/4.0.0"</span>
+         <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+         <span class="na">xsi:schemaLocation=</span><span class="s">"http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;modelVersion&gt;</span>4.0.0<span class="nt">&lt;/modelVersion&gt;</span>
+
+    <span class="nt">&lt;groupId&gt;</span>com.servicecomb.example<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>HelloService<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>1.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+
+    <span class="nt">&lt;dependencies&gt;</span>
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>1.5.12.RELEASE<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>1.1.0<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.hibernate<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>hibernate-validator<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>5.3.6.Final<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+    <span class="nt">&lt;/dependencies&gt;</span>
+
+    <span class="nt">&lt;dependencyManagement&gt;</span>
+        <span class="nt">&lt;dependencies&gt;</span>
+            <span class="nt">&lt;dependency&gt;</span>
+                <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+                <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+                <span class="nt">&lt;version&gt;</span>1.1.0<span class="nt">&lt;/version&gt;</span>
+                <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+                <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+            <span class="nt">&lt;/dependency&gt;</span>
+        <span class="nt">&lt;/dependencies&gt;</span>
+    <span class="nt">&lt;/dependencyManagement&gt;</span>
+
+    <span class="nt">&lt;build&gt;</span>
+        <span class="nt">&lt;plugins&gt;</span>
+            <span class="nt">&lt;plugin&gt;</span>
+                <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+                <span class="nt">&lt;artifactId&gt;</span>spring-boot-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;/plugin&gt;</span>
+        <span class="nt">&lt;/plugins&gt;</span>
+    <span class="nt">&lt;/build&gt;</span>
+
+<span class="nt">&lt;/project&gt;</span>
+</code></pre></div></div>
+
+<h5 id="2-配置">2. 配置</h5>
+<p>新建ServiceComb配置文件src/main/resources/microservice.yaml，内容如下</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">helloworld</span>   <span class="c1"># 应用名，注意与网关服务器的应用名保持一致</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">helloservice</span>   <span class="c1"># 微服务名</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>       <span class="c1"># 微服务版本号</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>   <span class="c1"># 服务注册中心（重要）</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7777</span>    <span class="c1"># 微服务启动端口</span>
+</code></pre></div></div>
+
+<h5 id="3-项目入口">3. 项目入口</h5>
+
+<p>新建启动类HelloApplication.java，内容如下</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">package</span> <span class="n">com</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">.</span><span class="na">example</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.springboot.starter.provider.EnableServiceComb</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
+
+
+<span class="nd">@SpringBootApplication</span>
+<span class="c1">//这个注解使Spring能够自动配置ServiceComb模块</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloApplication</span> <span class="o">{</span>
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+        <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">HelloApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+
+</code></pre></div></div>
+
+<p>新建Controller类HelloController.java （这里我习惯SpringMvc的叫法，重点看注解）</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">package</span> <span class="n">com</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">.</span><span class="na">example</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.GetMapping</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.PathVariable</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMapping</span><span class="o">;</span>
+
+<span class="c1">//restful服务契约</span>
+<span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"helloController"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloController</span> <span class="o">{</span>
+
+    <span class="nd">@GetMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/hello/{name}"</span><span class="o">)</span>
+    <span class="kd">public</span> <span class="nc">String</span> <span class="nf">hello</span><span class="o">(</span><span class="nd">@PathVariable</span><span class="o">(</span><span class="s">"name"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+        <span class="k">return</span> <span class="s">"Hello, "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+    <span class="o">}</span>
+
+<span class="o">}</span>
+
+</code></pre></div></div>
+
+<h5 id="4-启动">4. 启动</h5>
+<p>到此，一个微服务就写完了，如下在IDEA里面直接启动应用
+<img src="/assets/images/zuul/demo-helloservice-start.png" alt="在这里插入图片描述" /></p>
+
+<h4 id="二-编写zuul网关服务">二. 编写Zuul网关服务</h4>
+<h5 id="1-添加依赖-1">1. 添加依赖</h5>
+<p>新建maven项目 zuulserver，pom文件如下</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>
+<span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;project</span> <span class="na">xmlns=</span><span class="s">"http://maven.apache.org/POM/4.0.0"</span>
+         <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+         <span class="na">xsi:schemaLocation=</span><span class="s">"http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;modelVersion&gt;</span>4.0.0<span class="nt">&lt;/modelVersion&gt;</span>
+
+    <span class="nt">&lt;groupId&gt;</span>com.servicecomb.example<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>zuulserver<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>1.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+
+    <span class="nt">&lt;dependencies&gt;</span>
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>1.5.12.RELEASE<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+        <span class="c">&lt;!-- ServiceComb框架，提供基础能力 --&gt;</span>
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-servicecomb<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>1.1.0<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+        <span class="c">&lt;!-- ServiceComb与SpringCloud Zuul的集成框架 --&gt;</span>
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>1.1.0<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+        <span class="c">&lt;!-- SpringCloud Zuul框架 --&gt;</span>
+        <span class="nt">&lt;dependency&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>1.1.0<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+
+    <span class="nt">&lt;/dependencies&gt;</span>
+
+    <span class="c">&lt;!-- 导入ServiceComb所需依赖 --&gt;</span>
+    <span class="nt">&lt;dependencyManagement&gt;</span>
+        <span class="nt">&lt;dependencies&gt;</span>
+            <span class="nt">&lt;dependency&gt;</span>
+                <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+                <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+                <span class="nt">&lt;version&gt;</span>1.1.0<span class="nt">&lt;/version&gt;</span>
+                <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+                <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+            <span class="nt">&lt;/dependency&gt;</span>
+        <span class="nt">&lt;/dependencies&gt;</span>
+    <span class="nt">&lt;/dependencyManagement&gt;</span>
+
+    <span class="nt">&lt;build&gt;</span>
+        <span class="nt">&lt;plugins&gt;</span>
+            <span class="nt">&lt;plugin&gt;</span>
+                <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+                <span class="nt">&lt;artifactId&gt;</span>spring-boot-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;/plugin&gt;</span>
+        <span class="nt">&lt;/plugins&gt;</span>
+    <span class="nt">&lt;/build&gt;</span>
+
+<span class="nt">&lt;/project&gt;</span>
+
+</code></pre></div></div>
+<h5 id="2-配置文件">2. 配置文件</h5>
+<p>新建springboot配置文件src/main/resources/application.yaml，内容如下</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">zuul</span><span class="pi">:</span>
+  <span class="na">routes</span><span class="pi">:</span>         <span class="c1"># 定义路由转发规则。凡是匹配/helloservice/**的路由都会转发到helloservice服务</span>
+    <span class="na">helloservice</span><span class="pi">:</span> <span class="s">/helloservice/**</span>
+<span class="na">server</span><span class="pi">:</span>            
+  <span class="na">port</span><span class="pi">:</span> <span class="m">8080</span>     <span class="c1">#SpringBoot框架的配置，服务启动端口</span>
+</code></pre></div></div>
+<p>新建ServiceComb配置文件src/main/resources/microservice.yaml，内容如下</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">helloworld</span>   <span class="c1"># 应用ID</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">gateway</span>     <span class="c1">#  微服务名</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>    <span class="c1">#  微服务版本</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>   <span class="c1"># 服务注册中心地址 （重要）</span>
+</code></pre></div></div>
+
+<h5 id="3项目入口">3.项目入口</h5>
+<p>新建启动类 ZuulApplication.java</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">package</span> <span class="n">com</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">.</span><span class="na">example</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.springboot.starter.provider.EnableServiceComb</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.cloud.netflix.zuul.EnableZuulProxy</span><span class="o">;</span>
+
+<span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableZuulProxy</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">ZuulApplication</span> <span class="o">{</span>
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+        <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ZuulApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>新建静态文件 src/main/resources/static/index.html，内容如下 （static目录是按springboot项目规范，属于应用静态文件根目录）</p>
+<div class="language-html highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;!DOCTYPE HTML&gt;</span>
+<span class="nt">&lt;html&gt;</span>
+<span class="nt">&lt;head&gt;</span>
+    <span class="nt">&lt;meta</span> <span class="na">charset=</span><span class="s">"utf-8"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;link</span> <span class="na">rel=</span><span class="s">"stylesheet"</span> <span class="na">href=</span><span class="s">"https://cdn.bootcss.com/bootstrap/4.0.0/css/bootstrap.min.css"</span> <span class="na">integrity=</span><span class="s">"sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;script </span><span class="na">src=</span><span class="s">"https://code.jquery.com/jquery-3.2.1.min.js"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;&lt;/script&gt;</span>
+
+<span class="nt">&lt;/head&gt;</span>
+<span class="nt">&lt;body&gt;</span>
+
+<span class="nt">&lt;div</span> <span class="na">style=</span><span class="s">"width:300px; margin:0 auto ; margin-top: 50px;"</span><span class="nt">&gt;</span>
+
+<span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"input-group mb-3"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;input</span> <span class="na">id=</span><span class="s">"username"</span> <span class="na">type=</span><span class="s">"text"</span> <span class="na">class=</span><span class="s">"form-control"</span> <span class="na">placeholder=</span><span class="s">"Username"</span> <span class="na">aria-label=</span><span class="s">"Username"</span> <span class="na">aria-describedby=</span><span class="s">"basic-addon1"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;div</span> <span class="na">class=</span><span class="s">"input-group-prepend"</span><span class="nt">&gt;</span>
+        <span class="nt">&lt;button</span> <span class="na">style=</span><span class="s">""</span> <span class="na">type=</span><span class="s">"button"</span> <span class="na">class=</span><span class="s">"btn btn-primary"</span> <span class="na">onclick=</span><span class="s">"testCall()"</span><span class="nt">&gt;</span>打招呼<span class="nt">&lt;/button&gt;</span>
+    <span class="nt">&lt;/div&gt;</span>
+<span class="nt">&lt;/div&gt;</span>
+<span class="nt">&lt;div</span> <span class="nt">&gt;</span>
+    <span class="nt">&lt;div</span> <span class="na">style=</span><span class="s">"height: 200px;"</span> <span class="na">class=</span><span class="s">"form-control"</span>  <span class="na">id=</span><span class="s">"resultDiv"</span> <span class="nt">&gt;</span>
+    <span class="nt">&lt;/div&gt;</span>
+<span class="nt">&lt;/div&gt;</span>
+
+<span class="nt">&lt;/div&gt;</span>
+
+<span class="nt">&lt;/body&gt;</span>
+<span class="nt">&lt;script&gt;</span>
+    <span class="kd">function</span> <span class="nx">testCall</span><span class="p">()</span> <span class="p">{</span>
+
+        <span class="kd">var</span> <span class="nx">username</span> <span class="o">=</span> <span class="nx">$</span><span class="p">(</span><span class="dl">"</span><span class="s2">#username</span><span class="dl">"</span><span class="p">).</span><span class="nx">val</span><span class="p">();</span>
+
+        <span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="nx">username</span><span class="p">){</span>
+            <span class="k">return</span>
+        <span class="p">}</span>
+
+        <span class="nx">$</span><span class="p">.</span><span class="nx">ajax</span><span class="p">({</span>
+            <span class="na">url</span><span class="p">:</span> <span class="dl">"</span><span class="s2">/helloservice/hello/</span><span class="dl">"</span><span class="o">+</span><span class="nx">username</span><span class="p">,</span>
+            <span class="na">success</span><span class="p">:</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">data</span><span class="p">)</span> <span class="p">{</span>
+                <span class="kd">var</span> <span class="nx">resultDiv</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementById</span><span class="p">(</span><span class="dl">"</span><span class="s2">resultDiv</span><span class="dl">"</span><span class="p">);</span>
+                <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span>
+                <span class="nx">resultDiv</span><span class="p">.</span><span class="nx">innerText</span> <span class="o">=</span> <span class="nx">data</span><span class="p">;</span>
+            <span class="p">},</span>
+            <span class="na">error</span><span class="p">:</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">data</span><span class="p">)</span> <span class="p">{</span>
+                <span class="kd">var</span> <span class="nx">resultDiv</span> <span class="o">=</span> <span class="nb">document</span><span class="p">.</span><span class="nx">getElementById</span><span class="p">(</span><span class="dl">"</span><span class="s2">resultDiv</span><span class="dl">"</span><span class="p">);</span>
+                <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span>
+                <span class="nx">resultDiv</span><span class="p">.</span><span class="nx">innerText</span> <span class="o">=</span> <span class="nx">JSON</span><span class="p">.</span><span class="nx">stringify</span><span class="p">(</span><span class="nx">data</span><span class="p">);</span>
+            <span class="p">}</span>
+        <span class="p">})</span>
+    <span class="p">}</span>
+<span class="nt">&lt;/script&gt;</span>
+<span class="nt">&lt;/html&gt;</span>
+</code></pre></div></div>
+<h5 id="4-启动-1">4. 启动</h5>
+<p>到此，网关服务器写完，如下在IDEA里面直接启动应用
+<img src="/assets/images/zuul/demo-zuulservice-start.jpg" alt="在这里插入图片描述" /></p>
+
+<h4 id="三-演示效果">三. 演示效果</h4>
+<p>浏览器访问http://localhost:8080/ ，如下图。
+在输入框中输入姓名，就可以在下面看到打招呼的信息</p>
+
+<p><img src="/assets/images/zuul/demo-run.png" alt="在这里插入图片描述" /></p>
+
+<h3 id="总结">总结</h3>
+<p>从以上的示例可以看出，通过 ServiceComb 结合SpringCloud Zuul 实现服务网关功能只需一些简单的配置。后续可以在网关服务上实现统一的鉴权，日志记录，和自定义过滤器等。</p>
+
+<h3 id="参考">参考</h3>
+<ul>
+  <li>[1] <a href="https://cloud.spring.io/spring-cloud-netflix/multi/multi__router_and_filter_zuul.html">SpringCloud Zuul</a></li>
+  <li>[2] <a href="http://servicecomb.apache.org/cn/docs/quick-start/">ServiceComb</a></li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
+  
+
+
+  
+  
+  
+
+  <p class="page__taxonomy">
+    <strong><i class="fa fa-fw fa-tags" aria-hidden="true"></i> 标签: </strong>
+    <span itemprop="keywords">
+    
+      
+      
+      <a href="/tags/#servicecomb" class="page__taxonomy-item" rel="tag">ServiceComb</a><span class="sep">, </span>
+    
+      
+      
+      <a href="/tags/#springcloud-zuul" class="page__taxonomy-item" rel="tag">SpringCloud Zuul</a><span class="sep">, </span>
+    
+      
+      
+      <a href="/tags/#%E5%BE%AE%E6%9C%8D%E5%8A%A1" class="page__taxonomy-item" rel="tag">微服务</a>
+    
+    </span>
+  </p>
+
+
+
+
+
+        
+          
+            
+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> 最新的:</strong> <time datetime="2019-01-22">2019年1月22日</time></p>
+            
+          
+        
+      </footer>
+
+      <section class="page__share">
+  
+    <h4 class="page__share-title">分享</h4>
+  
+
+  <a href="https://twitter.com/intent/tweet?via=ServiceComb&text=基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统 /cn/docs/servicecomb-springcloud-zuul-demo/" class="btn btn--twitter" title="分享 Twitter"><i class="fa fa-fw fa-twitter" aria-hidden="true"></i><span> Twitter</span></a>
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+
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+</section>
+
+
+      
+  <nav class="pagination">
+    
+      <a href="/cn/docs/distributed-transaction-of-services-2/" class="pagination--pager" title="基于服务的分布式事务(下篇)
+">向前</a>
+    
+    
+      <a href="/cn/docs/customized-tracing-with-servicecomb/" class="pagination--pager" title="ServiceComb + Zipkin : 使用篇——自定义追踪
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+  </nav>
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+      
+        <!-- Start static comments -->
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+          <fieldset>
+            <label for="comment-form-name">姓名 <small class="required">*</small></label>
+            <input type="text" id="comment-form-name" name="fields[name]" tabindex="2" />
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+            <label for="comment-form-email">电子邮箱 <small class="required">*</small></label>
+            <input type="email" id="comment-form-email" name="fields[email]" tabindex="3" />
+          </fieldset>
+          <fieldset>
+            <label for="comment-form-url">网站（可选）</label>
+            <input type="url" id="comment-form-url" name="fields[url]" tabindex="4"/>
+          </fieldset>
+          <fieldset class="hidden" style="display: none;">
+            <input type="hidden" name="options[slug]" value="servicecomb-springcloud-zuul-demo">
+            <label for="comment-form-location">Not used. Leave blank if you are a human.</label>
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+          <!-- Start comment form alert messaging -->
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+    <meta itemprop="headline" content="在Kubernetes集群中使用JMeter对Company示例进行压力测试">
+    <meta itemprop="description" content="介绍如何在Kubernetes集群上使用JMeter进行压力测试">
+    <meta itemprop="datePublished" content="August 25, 2017">
+    <meta itemprop="dateModified" content="August 26, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">在Kubernetes集群中使用JMeter对Company示例进行压力测试
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="背景">背景</h2>
+
+<p>　　压力测试是评估应用性能的一种有效手段。此外，越来越多的应用被拆分为多个微服务而每个微服务的性能不一,有的微服务是计算密集型，有的是IO密集型。</p>
+
+<p>　　因此，压力测试在基于微服务架构的网络应用中扮演着越来越重要的角色。本文将在<a href="https://kubernetes.io/">Kubernetes</a>集群中使用<a href="https://www.google.com.hk/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=1&amp;ved=0ahUKEwiv9rjg7u_VAhUkxoMKHfoYDaYQFggvMAA&amp;url=http%3A%2F%2Fjmeter.apache.org%2F&amp;usg=AFQjCNHIHCOA-F9LnhaAn_STCWyPPgOpdw">JMeter 3.2</a>来对<a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop">Company应用</a>进行性能评估。</p>
+
+<p>　　在上文<a href="http://servicecomb.io/cn/docs/autoscale-on-company/">《微服务化后的按需精细化资源控制》</a>中已了解到Manager服务的资源需求最大，本次使用JMeter对Company应用进行精细的性能测试。</p>
+
+<h2 id="制定jmeter测试方案">制定JMeter测试方案</h2>
+<p>　　制定的测试方案为：</p>
+
+<ul>
+  <li>
+    <p>由于登录认证会造成较大时延，故在压力测试主体运行前完成用户认证事宜；</p>
+  </li>
+  <li>
+    <p>对Company应用多个接口持续并发访问，QueryWorker, QueryBeekeeperDrone, QueryBeekeeperQueen分别对Company中的服务发起请求压力。</p>
+  </li>
+</ul>
+
+<p>　　测试方案文件笔者已托管于github上，可直接获取：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop
+<span class="nb">cd </span>ServiceComb-Company-WorkShop/stress-tests
+</code></pre></div></div>
+
+<p class="figure-caption"><img src="/assets/images/company_test_plan.png" alt="图1 测试计划" /><br />
+图1 测试计划</p>
+
+<p>　　在我们测试计划的开始，我们设置了一些在所有线程组都能共享的全局配置。其中，<em>CSV Data Set Config</em>组件从本地csv文件中加载测试服务器的信息。<em>HTTP Request Defaults</em>组件则为每个请求预设了默认的请求服务器信息，如IP和端口。<em>User Defined Variables</em>组件定义了全局共享的变量。<em>HTTP Header Manager</em>组件自动为每个请求添加HTTP的请求头部。</p>
+
+<p>　　接着就是<em>setUp</em>线程组了。其作用主要是处理用户认证。由于Cookie在网络应用中得到较广泛的应用，因此JMeter中内置的认证方式是通过<em>HTTP Cookie Manager</em>组件来完成的。然而，我们的Company示例采用的是基于Token的认证方式而不是基于Cookie的认证方式。因此，这给我们在JMeter中处理认证添加了一点难度。<em>Remove header pre processor</em>组件使用了以下的脚本来去掉登录时请求中带有默认的请求头部，即登录请求时并不需要带有鉴权的请求头部。</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>import org.apache.jmeter.protocol.http.control.Header<span class="p">;</span>
+sampler.getHeaderManager<span class="o">()</span>.removeHeaderNamed<span class="o">(</span><span class="s2">"Authorization"</span><span class="o">)</span><span class="p">;</span>
+</code></pre></div></div>
+<p>　　然后我们通过<em>Set up Login</em>组件发起一次登录请求来获取用户登录鉴权信息。之后再通过正则表达式提取组件<em>authorization_extractor</em>来提取响应头部中的<em>Authorization</em>对应的值。由于变量无法在不同的线程组中共享和传递，这时候<em>BeanShell PostProcessor</em>组件就派上用场了，它主要工作就是将当前线程组中的目标变量转换为全局属性。</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">${</span><span class="nv">__setProperty</span><span class="p">(Authorization,</span><span class="k">${</span><span class="nv">Authorization</span><span class="k">}</span><span class="p">,)</span><span class="k">}</span>
+</code></pre></div></div>
+<p>　　在测试计划的最后部分就是我们要在Company示例上进行的压力测试。测试所选取的三个接口都是通过经理服务路由至其他两个服务的，即技工服务和养蜂人服务。在我们测试开始之前，我们通过打开<em>StressTest</em>的开关来禁用经理服务提供的缓存能力，从而使得技工服务和养蜂人服务能够处理到用户请求的计算任务。此外，我们通过将请求参数设置为1来简化技工服务和养蜂人服务的计算任务。</p>
+
+<h2 id="启动测试">启动测试</h2>
+
+<ul>
+  <li>
+    <p>在Kubernetes集群中以无资源限制的方式来运行<em>Company应用</em>。</p>
+  </li>
+  <li>
+    <p>修改hosts.csv文件，使其匹配正在Kubernetes集群中运行的Company应用的服务地址。其中，默认的hosts.csv文件内容为：</p>
+
+    <pre><code class="language-csv"> 127.0.0.1,8083
+</code></pre>
+  </li>
+  <li>
+    <p>运行测试，启动200个并发线程发起请求压力，并设置测试时常为600秒。</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> jmeter <span class="nt">-n</span> <span class="nt">-t</span> workshop.jmx <span class="nt">-j</span> workshop.log <span class="nt">-l</span> workshop.jtl <span class="nt">-Jthreads</span><span class="o">=</span>200 <span class="nt">-Jduration</span><span class="o">=</span>600
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="测试结果">测试结果</h2>
+<p>　　在不同并发度下的测试结果如下图所示：</p>
+
+<p class="figure-caption"><img src="/assets/images/company_concurrency_performance.png" alt="图2 并发不同时的性能比较" class="align-center" />
+图2 并发不同时的性能比较</p>
+
+<p>　　可以看出，经理服务的性能在到达瓶颈（15并发度）前非常稳定，保持平均响应时间极低的情况下吞吐量快速上升到<strong>最大约1000请求每秒</strong>的水平。 但随着并发度的进一步提升，平均响应时间开始快速增加。因此，<strong>将响应时间统计数据作为评估熔断超时的设置非常合适</strong>。</p>
+
+<p class="figure-caption"><img src="/assets/images/company_response_time.png" alt="图3 不同服务的平均响应时间" class="align-center" />
+图3 不同服务的平均响应时间</p>
+
+<p>　　上图显示了不同服务的平均响应时间。由于养蜂人服务需要调用技工服务，因此其响应时间相对于技工服务的响应时间要稍微久一点。</p>
+
+<p class="figure-caption"><img src="/assets/images/company_cpu_load.png" alt="图4 不同并发度下CPU的负载" class="align-center" />
+图4 不同并发度下CPU的负载</p>
+
+<p>　　为了找出性能卡在了15并发度时的原因，我们回看了<a href="https://github.com/kubernetes/heapster">Heapster</a>上的监控数据。如下图所示，显然，<strong>经理服务是当前系统的瓶颈所在</strong>。它在吞吐量为1000 req/s时达到了最大的CPU负载。 相对而言，其它服务对资源的需求的增长速度要慢得多。</p>
+
+<p>　　由于经理服务的日志是直接输出到stdout上的，且JMeter的测试端以单机模式运行时可能并不能同时模拟出足够的并发量。依此对在同一并发度（200）下不同log的设置（log4j1 stdout, log4j2 stdout，log4j2 异步，无日志输出）进行测试。其中，异步log在<em>log4j2.xml</em>文件中的设置如下所示：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8" ?&gt;</span>
+<span class="nt">&lt;Configuration</span> <span class="na">status=</span><span class="s">"INFO"</span><span class="nt">&gt;</span>
+  <span class="nt">&lt;Appenders&gt;</span>
+    <span class="nt">&lt;RandomAccessFile</span> <span class="na">name=</span><span class="s">"RandomAccessFile"</span> <span class="na">fileName=</span><span class="s">"manager.log"</span> <span class="na">immediateFlush=</span><span class="s">"false"</span> <span class="na">append=</span><span class="s">"false"</span><span class="nt">&gt;</span>
+      <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"%d [%p] %m %l%n"</span><span class="nt">/&gt;</span>
+    <span class="nt">&lt;/RandomAccessFile&gt;</span>
+  <span class="nt">&lt;/Appenders&gt;</span>
+  <span class="nt">&lt;Loggers&gt;</span>
+    <span class="nt">&lt;asyncRoot</span> <span class="na">level=</span><span class="s">"info"</span><span class="nt">&gt;</span>
+      <span class="nt">&lt;AppenderRef</span> <span class="na">ref=</span><span class="s">"RandomAccessFile"</span><span class="nt">/&gt;</span>
+    <span class="nt">&lt;/asyncRoot&gt;</span>
+  <span class="nt">&lt;/Loggers&gt;</span>
+<span class="nt">&lt;/Configuration&gt;</span>
+</code></pre></div></div>
+<p>此外，还需要添加如下<em>disruptor</em>的依赖项使异步的设置生效：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>com.lmax<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>disruptor<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>3.3.6<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>没有日志输出的设置仅仅是将上述<em>log4j2.xml</em>文件中的日志输出级别从<em>info</em>改为<em>off</em>即可。此外，我们还使用JMeter分布式的模式进行了相关的测试。JMeter中使用分布式的模式来运行主要分两步：</p>
+
+<ol>
+  <li>
+    <p>在每个测试从节点上运行<em>jmeter-server</em>，其运行指令如下：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jmeter-server <span class="nt">-Djava</span>.rmi.server.hostname<span class="o">=</span><span class="si">$(</span>ifconfig eth0 | <span class="nb">grep</span> <span class="s2">"inet addr"</span> | <span class="nb">awk</span> <span class="s1">'{print $2}'</span> | <span class="nb">cut</span> <span class="nt">-d</span> <span class="s2">":"</span> <span class="nt">-f2</span><span class="si">)</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在测试主节点上运行<em>jmeter</em>，指令如下：</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jmeter <span class="nt">-n</span> <span class="nt">-R</span> host1,host2 <span class="nt">-t</span> workshop.jmx <span class="nt">-j</span> workshop.log <span class="nt">-l</span> workshop.jtl <span class="nt">-Gmin</span><span class="o">=</span>1 <span class="nt">-Gmax</span><span class="o">=</span>2 <span class="nt">-Gthreads</span><span class="o">=</span>200 <span class="nt">-Gduration</span><span class="o">=</span>600
+</code></pre></div>    </div>
+
+    <p class="notice--warning"><em>注意事项</em>：JMeter属性在分布式模式下并不能生效，需要将其声明为全局的属性。因此，此处我们用的是<em>-G</em>的选项而不是之前的<em>-J</em>的选项。</p>
+  </li>
+</ol>
+
+<p>运行结果如下所示：</p>
+
+<p><img src="/assets/images/company_log_and_jmeter.png" alt="不同日志设置不同模式下的性能" class="align-center" /></p>
+
+<p>　　从上图可以看出：</p>
+
+<ul>
+  <li>
+    <p>JMeter单机测试和分布式测试的性能都非常接近，说明单机模式的JMeter测试暂时来说是足以模拟出足够的并发数来处理当前的测试场景的。</p>
+  </li>
+  <li>
+    <p>日志的输出的确对系统的性能造成了较大的影响，可以看到，异步输出日志的方式能比同步输出的方式提升接近100%的吞吐量。因此，<strong>在生产环境下使用完全同步输出日志的方式可能并不会有较理想的性能。</strong></p>
+  </li>
+  <li>
+    <p>log4j2的吞吐量相对于log4j1而言大幅提高了约40%，内存使用量也更少了。因此，<strong>推荐使用性能更佳的log4j2替换掉陈旧的log4j1</strong>。</p>
+  </li>
+</ul>
+
+<p class="figure-caption"><img src="/assets/images/company_different_log_memory_usage.png" alt="图5 不同日志设置下的内存使用量" class="align-center" />
+图5 不同日志设置下的内存使用量</p>
+
+<p>　　尽管异步日志的方式能极大地提高系统的吞吐量，但它同时也占用了较多的内存，如图5所示。</p>
+
+<p class="figure-caption"><img src="/assets/images/company_memory_used.png" alt="图6 测试过程的内存使用量" class="align-center" />
+图6 测试过程的内存使用量</p>
+
+<p>　　图6显示了在测试过程中不同服务的内存使用量。由于Company示例只是一个简单的用例，在测试过程中各个服务的内存使用率都相对稳定。然而，相对<em>告示栏</em>服务（使用go语言编写）的内存使用量而言，其它以Java来编写的服务则占用了较多的内存。</p>
+
+<h2 id="总结">总结</h2>
+
+<p>　　对应用进行压力测试往往能在应用投入生产环境前帮助我们找出服务中潜在的问题。压力测试也能模拟生产环境，从而来验证服务是否已达到规定的性能指标。而根据压力测试的结果，我们可以权衡Pod部署时的设置来保证SLA的同时获得最大的系统吞吐能力。</p>
+
+<p>　　基于微服务架构的应用不仅在设计、编码及测试方面变得更加灵活，同时也使得部署更加方便。基于微服务架构能够保证资源的弹性伸缩极其迅捷，我们可以根据服务的真实可承受压力设置不同的副本数和资源配置来节约资源。此外，在云上也能借助其弹性伸缩能力使得服务能够应对访问风暴。</p>
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+  <li><a href="#servicecenter和eureka异构服务中心通讯" id="markdown-toc-servicecenter和eureka异构服务中心通讯">ServiceCenter和Eureka异构服务中心通讯</a>    <ul>
+      <li><a href="#运行环境" id="markdown-toc-运行环境">运行环境</a></li>
+      <li><a href="#运行前的准备" id="markdown-toc-运行前的准备">运行前的准备：</a></li>
+      <li><a href="#步骤1启动eureka环境和服务" id="markdown-toc-步骤1启动eureka环境和服务">步骤1：启动Eureka环境和服务</a></li>
+      <li><a href="#步骤2启动servicecenter环境和服务" id="markdown-toc-步骤2启动servicecenter环境和服务">步骤2：启动Servicecenter环境和服务</a></li>
+      <li><a href="#步骤3结果验证" id="markdown-toc-步骤3结果验证">步骤3：结果验证</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="servicecenter和eureka异构服务中心通讯">ServiceCenter和Eureka异构服务中心通讯</h2>
+
+<p>本案例模拟了异构服务中心之间的通讯场景，包括以下四个部分：</p>
+<ul>
+  <li>EurekaServer： Eureka服务中心</li>
+  <li>AccountServer：注册到Eureka的账号服务</li>
+  <li>Servicecomb-ServiceCenter：Servicecomb-ServiceCenter服务中心</li>
+  <li>HelloServer：注册到Servicecomb-ServiceCenter，需要使用AccountServer的服务</li>
+</ul>
+
+<p>在传统的环境中，不同服务中心之间的实例是不能互相发现并访问的。当我们使用Syncer后，这将很容易实现。如下图：<br />
+<img src="/assets/images/docs/syncer/multi-servicecenters.png" alt="image" /></p>
+
+<h3 id="运行环境">运行环境</h3>
+<ol>
+  <li>2台linux机器: （假设为：10.0.0.10 和 10.0.0.11）</li>
+  <li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">JDK 1.8</a></li>
+  <li><a href="https://maven.apache.org/install.html">Maven 3.x</a></li>
+  <li><a href="https://golang.google.cn/dl/">Go 1.11.4</a></li>
+</ol>
+
+<h3 id="运行前的准备">运行前的准备：</h3>
+<ol>
+  <li><a href="/cn/docs/service-center/install/">安装 ServiceCenter发布包（&gt;=1.3.0）</a>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ project_dir</span><span class="o">=</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>
+<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span>  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
+</code></pre></div>    </div>
+  </li>
+  <li>下载<a href="https://github.com/apache/servicecomb-service-center/tree/master/syncer/samples/multi-servicecenters">样例源码</a>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-service-center.git
+<span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h3 id="步骤1启动eureka环境和服务">步骤1：启动Eureka环境和服务</h3>
+<p>机器： 10.0.0.10</p>
+<h4 id="1-编译项目">1. 编译项目</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 编译 EurekaServer 和 AccountServer</span>
+<span class="nv">$ </span><span class="nb">cd </span>samples/multi-servicecenters/eureka
+<span class="nv">$ </span>mvn clean <span class="nb">install</span>
+</code></pre></div></div>
+<h4 id="2-启动eurekaserver">2. 启动EurekaServer：</h4>
+<ul>
+  <li>修改启动配置
+ 文件位置：${project_dir}/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/eureka-server/src/main/resources/application.yaml
+    <div class="language-yml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spring</span><span class="pi">:</span>
+<span class="na">application</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">eureka-server</span>
+<span class="na">server</span><span class="pi">:</span>
+<span class="na">port </span><span class="pi">:</span> <span class="m">8761</span>
+<span class="c1">#  servlet:</span>
+<span class="c1">#    context-path: /eureka</span>
+<span class="na">eureka</span><span class="pi">:</span>
+<span class="na">instance</span><span class="pi">:</span>
+  <span class="na">hostname </span><span class="pi">:</span> <span class="s">10.0.0.10</span>
+<span class="na">client</span><span class="pi">:</span>
+  <span class="na">registerWithEureka </span><span class="pi">:</span> <span class="no">false</span>
+  <span class="na">fetchRegistry </span><span class="pi">:</span> <span class="no">false</span>
+  <span class="na">serviceUrl</span><span class="pi">:</span>
+    <span class="na">defaultZone </span><span class="pi">:</span> <span class="s">http://${eureka.instance.hostname}:${server.port}/eureka/</span>
+<span class="na">management</span><span class="pi">:</span>
+<span class="na">endpoints</span><span class="pi">:</span>
+  <span class="na">web</span><span class="pi">:</span>
+    <span class="na">exposure</span><span class="pi">:</span>
+      <span class="na">include</span><span class="pi">:</span> <span class="s2">"</span><span class="s">*"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>启动服务
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 启动 EurekaServer</span>
+<span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/eureka-server/
+<span class="nv">$ </span><span class="nb">nohup </span>mvn spring-boot:run &amp; <span class="o">&gt;&gt;</span> eureka-server.log 2&gt;&amp;1 &amp;
+</code></pre></div>    </div>
+    <p>浏览器打开http://10.0.0.10:8761，若出现如下页面，则启动成功<br />
+ <img src="/assets/images/docs/syncer/eureka-server-success.jpg" alt="image" /></p>
+  </li>
+</ul>
+
+<h4 id="3-启动accountserver">3. 启动AccountServer</h4>
+<ul>
+  <li>修改启动配置<br />
+ 文件位置：${project_dir}/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/account-server/src/main/resources/application.yaml
+    <div class="language-yml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spring</span><span class="pi">:</span>
+<span class="na">application</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">account-server</span>
+<span class="na">server</span><span class="pi">:</span>
+<span class="na">port</span><span class="pi">:</span> <span class="m">8090</span>
+<span class="na">eureka</span><span class="pi">:</span>
+<span class="na">instance</span><span class="pi">:</span>
+  <span class="na">hostname</span><span class="pi">:</span> <span class="s">10.0.0.10</span>
+<span class="na">client</span><span class="pi">:</span>
+  <span class="na">service-url</span><span class="pi">:</span>
+    <span class="na">defaultZone</span><span class="pi">:</span> <span class="s">http://${eureka.instance.hostname}:8761/eureka/</span>
+<span class="na">management</span><span class="pi">:</span>
+<span class="na">endpoints</span><span class="pi">:</span>
+  <span class="na">web</span><span class="pi">:</span>
+    <span class="na">exposure</span><span class="pi">:</span>
+      <span class="na">include</span><span class="pi">:</span> <span class="s2">"</span><span class="s">*"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>启动服务
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#启动 AccountServer</span>
+<span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/account-server
+<span class="nv">$ </span>mvn spring-boot:run
+<span class="c"># 出现如下字样则为成功</span>
+2019-09-19 17:20:35.534  INFO 20890 <span class="nt">---</span> <span class="o">[</span>           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port<span class="o">(</span>s<span class="o">)</span>: 8090 <span class="o">(</span>http<span class="o">)</span> with context path <span class="s1">''</span>
+2019-09-19 17:20:35.548  INFO 20890 <span class="nt">---</span> <span class="o">[</span>           main] .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8090
+2019-09-19 17:20:35.551  INFO 20890 <span class="nt">---</span> <span class="o">[</span>           main] o.a.s.s.account.AccountApplication       : Started AccountApplication <span class="k">in </span>3.92 seconds <span class="o">(</span>JVM running <span class="k">for </span>6.754<span class="o">)</span>
+2019-09-19 17:20:35.617  INFO 20890 <span class="nt">---</span> <span class="o">[</span>nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_ACCOUNT-SERVER/10.0.0.10:account-server:8090 - registration status: 204
+</code></pre></div>    </div>
+
+    <p>此时打开http://10.0.0.10:8761，可以看到AccountServer已经注册成功<br />
+ <img src="/assets/images/docs/syncer/eureka-account-server-success.jpg" alt="image" /></p>
+  </li>
+</ul>
+
+<h4 id="4-启动syncer">4. 启动Syncer</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/apache-servicecomb-service-center-1.3.0-linux-amd64/
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:8761/eureka <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191 <span class="nt">--sc-plugin</span><span class="o">=</span>eureka  <span class="nt">--node</span> eureka
+<span class="c">#出现如下字样则为成功</span>
+2019-09-19T17:28:28.809+0800  INFO  etcd/agent.go:55  start etcd success
+2019-09-19T17:28:28.809+0800  INFO  grpc/server.go:94 start grpc success
+2019-09-19T17:28:28.809+0800  DEBUG server/handler.go:39  is leader: <span class="nb">true
+</span>2019-09-19T17:28:28.809+0800  DEBUG server/handler.go:43  Handle Tick
+</code></pre></div></div>
+
+<h3 id="步骤2启动servicecenter环境和服务">步骤2：启动Servicecenter环境和服务</h3>
+<p>机器： 10.0.0.11</p>
+<h4 id="1-编译项目-1">1. 编译项目</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/servicecenter/hello-server/
+<span class="nv">$ GO111MODULE</span><span class="o">=</span>on go build
+</code></pre></div></div>
+
+<h4 id="2-启动servicecenter">2. 启动Servicecenter</h4>
+<ul>
+  <li>修改启动配置：<br />
+ 文件位置：${project_dir}/apache-servicecomb-service-center-1.3.0-linux-amd64/conf/app.conf
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>frontend_host_ip <span class="o">=</span> 10.0.0.11
+frontend_host_port <span class="o">=</span> 30103
+<span class="c">###################################################################</span>
+<span class="c"># sever options</span>
+<span class="c">###################################################################</span>
+<span class="c"># if you want to listen at ipv6 address, then set the httpaddr value like:</span>
+<span class="c"># httpaddr = 2400:A480:AAAA:200::159        (global scope)</span>
+<span class="c"># httpaddr = fe80::f816:3eff:fe17:c38b%eth0 (link-local scope)</span>
+httpaddr <span class="o">=</span> 10.0.0.11
+httpport <span class="o">=</span> 30100
+<span class="c"># ...以下省略...</span>
+</code></pre></div>    </div>
+  </li>
+  <li>启动 ServiceCenter 和 Frontend
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/apache-servicecomb-service-center-1.3.0-linux-amd64
+<span class="c"># 启动 ServiceCenter</span>
+<span class="nv">$ </span>./start-service-center.sh
+<span class="c"># 启动 前端页面 Frontend</span>
+<span class="nv">$ </span>./start-frontend.sh
+</code></pre></div>    </div>
+    <p>浏览器打开http://10.0.0.11:30103,若出现如下页面，则启动成功<br />
+ <img src="/assets/images/docs/syncer/service-center-server-success.jpg" alt="image" /></p>
+  </li>
+</ul>
+
+<h4 id="3-启动helloserver">3. 启动HelloServer</h4>
+<ul>
+  <li>修改启动配置：<br />
+ 文件位置：${project_dir}/servicecomb-service-center/syncer/samples/multi-servicecenters/servicecenter/hello-server/conf/microservice.yaml
+    <div class="language-yml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">service</span><span class="pi">:</span> <span class="c1"># 微服务配置</span>
+<span class="na">appId</span><span class="pi">:</span> <span class="s">eureka</span> <span class="c1"># eureka 中同步的实例appID均为：eureka</span>
+<span class="na">name</span><span class="pi">:</span> <span class="s">hello-server</span>
+<span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">instance</span><span class="pi">:</span> <span class="c1"># 实例信息</span>
+  <span class="na">protocol</span><span class="pi">:</span> <span class="s">rest</span>
+  <span class="na">listenAddress</span><span class="pi">:</span> <span class="s">10.0.0.11:8091</span> <span class="c1">#实例监听地址</span>
+<span class="na">provider</span><span class="pi">:</span> <span class="c1"># 服务端信息</span>
+<span class="na">appId</span><span class="pi">:</span> <span class="s">eureka</span>
+<span class="na">name</span><span class="pi">:</span> <span class="s">account-server</span>
+<span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">registry</span><span class="pi">:</span>
+<span class="na">address</span><span class="pi">:</span> <span class="s">http://10.0.0.11:30100</span>
+</code></pre></div>    </div>
+  </li>
+  <li>启动服务
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/servicecenter/hello-server
+<span class="nv">$ </span>./hello-server
+2019-09-19T18:37:50.645+0800	DEBUG	servicecenter/servicecenter.go:163	send heartbeat success
+2019-09-19T18:37:50.645+0800	WARN	servicecenter/servicecenter.go:85	discovery provider failed, appID <span class="o">=</span> eureka, name <span class="o">=</span> account-server, version <span class="o">=</span> 0.0.1
+2019-09-19T18:37:50.645+0800	INFO	servicecenter/servicecenter.go:87	waiting <span class="k">for </span>retry
+</code></pre></div>    </div>
+
+    <p>此时打开http://10.0.0.11:30103，可以看到HelloServer已经注册成功<br />
+ <img src="/assets/images/docs/syncer/service-center-hello-server-success.jpg" alt="image" /><br />
+ 但由于无法发现属于Eureka服务中心的AccountServer实例，HelloServer处于重试状态<br />
+ （==注：重试次数为3次，每次间隔30秒，所以我们需要在90秒内完成后面的操作==）</p>
+  </li>
+</ul>
+
+<h4 id="4启动syncer">4.启动Syncer</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/apache-servicecomb-service-center-1.3.0-linux-amd64/
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--sc-plugin</span><span class="o">=</span>servicecenter <span class="nt">--join-addr</span> 10.0.0.10:30190 <span class="nt">--node</span> servicecenter
+
+<span class="c">#出现以下内容则为Syncer成功启动，并同步了对方的实例</span>
+2019-09-19T18:44:35.536+0800	DEBUG	server/handler.go:62	is leader: <span class="nb">true
+</span>2019-09-19T18:44:35.536+0800	DEBUG	server/handler.go:79	Receive serf user event
+2019-09-19T18:44:35.536+0800	DEBUG	serf/agent.go:130	member <span class="o">=</span> servicecenter, groupName <span class="o">=</span> 0204d59328090c2f4449a088d4e0f1d8
+2019-09-19T18:44:35.536+0800	DEBUG	serf/agent.go:130	member <span class="o">=</span> eureka, groupName <span class="o">=</span> 34f53a9520a11c01f02f58f733e856b3
+2019-09-19T18:44:35.536+0800	DEBUG	server/handler.go:97	Going to pull data from eureka 10.0.0.10:30191
+2019-09-19T18:44:35.536+0800	INFO	grpc/client.go:76	Create new grpc connection to 10.0.0.10:30191
+2019-09-19T18:44:35.538+0800	DEBUG	servicecenter/servicecenter.go:87	create service success <span class="nv">orgServiceID</span><span class="o">=</span> account-server, curServiceID <span class="o">=</span> 80784229255ec96d90353e3c041bdf3586fdbbae
+2019-09-19T18:44:35.538+0800	DEBUG	servicecenter/servicecenter.go:90	trying to <span class="k">do </span>registration of instance, instanceID <span class="o">=</span> 10.0.0.10:account-server:8090
+2019-09-19T18:44:35.540+0800	DEBUG	servicecenter/sync.go:63	Registered instance successful, instanceID <span class="o">=</span> 78bca3e2daca11e99638fa163eca30e0
+</code></pre></div></div>
+
+<h3 id="步骤3结果验证">步骤3：结果验证</h3>
+<ol>
+  <li>
+    <p>此时的HelloServer获取实例成功，并调用了AccountServer的CheckHealth接口<br />
+<img src="/assets/images/docs/syncer/hello-server-discovery-success.jpg" alt="image" /></p>
+  </li>
+  <li>分别打开Euraka和ServiceCenter的网页，两个服务中心里均包含了所有的实例信息<br />
+<img src="/assets/images/docs/syncer/eureka-server-has-all.jpg" alt="image" /><br />
+<img src="/assets/images/docs/syncer/service-center-server-has-all.jpg" alt="image" /></li>
+  <li>curl命令调用HelloServer的Login接口
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://192.168.88.75:8091/login <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'Content-Type: application/json'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "user":"Jack",
+  "password":"123456"
+}'</span>
+welcome Jack
+</code></pre></div>    </div>
+    <p>HelloServer与AccountServer分别会打印如下的信息<br />
+AccountServer<br />
+<img src="/assets/images/docs/syncer/account-server-reply.jpg" alt="image" /> <br />
+HelloServer<br />
+<img src="/assets/images/docs/syncer/hello-server-result.jpg" alt="image" /></p>
+  </li>
+</ol>
+
+        
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+          
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+          
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+          
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+        
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+        
+          <span class="nav__sub-title">异构、多服务中心通讯 Syncer</span>
+        
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+          
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+    <meta itemprop="headline" content="Syncer 快速入门">
+    <meta itemprop="description" content="了解如何使用异构、多服务中心通讯工具">
+    
+    <meta itemprop="dateModified" content="November 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Syncer 快速入门
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#异构多服务中心通讯-syncer" id="markdown-toc-异构多服务中心通讯-syncer">异构、多服务中心通讯 Syncer</a></li>
+  <li><a href="#快速入门" id="markdown-toc-快速入门">快速入门</a>    <ul>
+      <li><a href="#命令行参数说明" id="markdown-toc-命令行参数说明">命令行参数说明:</a></li>
+      <li><a href="#单例模式single-mode" id="markdown-toc-单例模式single-mode">单例模式（Single Mode）</a></li>
+      <li><a href="#集群模式cluster-mode" id="markdown-toc-集群模式cluster-mode">集群模式（Cluster Mode）</a></li>
+      <li><a href="#结果验证" id="markdown-toc-结果验证">结果验证</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="异构多服务中心通讯-syncer">异构、多服务中心通讯 Syncer</h2>
+<p>Syncer是一个多服务中心的同步工具，专为大型微服务架构设计，用于在网络互通的情况下，不同技术栈服务中心、跨区域的实例同步，未来将对跨网络、跨云等场景提供支持。</p>
+
+<h2 id="快速入门">快速入门</h2>
+<ol>
+  <li>获取并启动服务中心</li>
+</ol>
+
+<p>以Service-center为例，详细参见：<a href="/cn/docs/service-center/install/">ServiceCenter 环境安装</a></p>
+
+<ol>
+  <li>下载并解压<a href="/cn/release/service-center-downloads/">ServiceCenter发布包（&gt;=1.3.0）</a>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 解压tar包</span>
+<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span>  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
+<span class="nv">$ </span><span class="nb">cd </span>apache-servicecomb-service-center-1.3.0-linux-amd64/
+</code></pre></div>    </div>
+  </li>
+  <li>启动ServiceCenter Syncer
+    <h3 id="命令行参数说明">命令行参数说明:</h3>
+    <ul>
+      <li>node:         syncer名称,集群内成员名必须唯一。</li>
+      <li>sc-addr:      服务注册中心地址。支持集群模式，多个地址间使用英文半角”,”隔开。</li>
+      <li>bind-addr:    Gossip协议通讯地址，用于Syncer间的消息传递、集群管理</li>
+      <li>rpc-addr:     RPC数据传输地址，用于Syncer间的数据同步</li>
+      <li>join-addr:    指向目标Syncer的BindAddr，当前Syncer将通过该地址加入网络</li>
+      <li>mode:         运行模式配置，当前支持两种模式，单实例模式“single”和集群模式“cluster”, cluster模式下每个syncer拥有三个实例</li>
+      <li>cluster-name: 当mode为”cluster“时，Syncer集群的名字</li>
+      <li>cluster-port: 当mode为“cluster”时，Syncer三个实例之间一致性协商的端口</li>
+    </ul>
+  </li>
+</ol>
+
+<p>假设有2个服务中心，每个服务中心都有一个用于微服务发现和注册的服务中心集群，如下所示：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: center">Service center</th>
+      <th style="text-align: center">Local address</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: center">http://10.0.0.10:30100</td>
+      <td style="text-align: center">10.0.0.10</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">http://10.0.0.11:30100</td>
+      <td style="text-align: center">10.0.0.11</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="单例模式single-mode">单例模式（Single Mode）</h3>
+
+<p>分别在两个机器上启动两个syncer来完成这两个服务中心之间的微服务数据同步</p>
+
+<ul>
+  <li>在10.0.0.10的机器上执行以下命令启动Syncer</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191
+</code></pre></div></div>
+
+<ul>
+  <li>在10.0.0.11的机器上执行以下命令启动Syncer，并加入10.0.0.10的gossip池</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--join-addr</span> 10.0.0.10:30191
+</code></pre></div></div>
+
+<h3 id="集群模式cluster-mode">集群模式（Cluster Mode）</h3>
+
+<p>分别在两个机器上启动两个syncer集群来完成这两个服务中心之间的微服务数据同步</p>
+
+<ul>
+  <li>在10.0.0.10的机器上启动syncer集群</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer011 <span class="nt">--cluster-port</span> 30201 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30290 <span class="nt">--rpc-addr</span> 10.0.0.10:30291 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer012 <span class="nt">--cluster-port</span> 30202 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30390 <span class="nt">--rpc-addr</span> 10.0.0.10:30391 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer013 <span class="nt">--cluster-port</span> 30203 <span class="nt">--join-addr</span> 10.0.0.10:30190
+</code></pre></div></div>
+
+<ul>
+  <li>在10.0.0.11机器上启动syncer集群</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer021 <span class="nt">--cluster-port</span> 30201 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30290 <span class="nt">--rpc-addr</span> 10.0.0.11:30291 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer022 <span class="nt">--cluster-port</span> 30202 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30390 <span class="nt">--rpc-addr</span> 10.0.0.11:30391 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer023 <span class="nt">--cluster-port</span> 30203 <span class="nt">--join-addr</span> 10.0.0.10:30190
+</code></pre></div></div>
+
+<h3 id="结果验证">结果验证</h3>
+<p>将微服务实例注册到其中一个ServiceCener后30秒，可以从每个ServiceCenter获取有关该实例的信息。</p>
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+        
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+      <section class="page__content" itemprop="text">
+        <h2 id="apache-servicecomb带您对话apache大咖">Apache ServiceComb带您对话Apache大咖</h2>
+
+<p><em>PMC沉睡了怎么办？首次发版项目不一定能够跑起来，甚至不一定能成功编译，一定要先把合规性问题解决！有人给项目提交Patch，我们从来不说“No“！我曾工作过的Cloudera，利用开源赚钱，至少赚到了买下Hortonworks公司的钱……开源微服务项目ServiceComb带您对话Apache大咖，领略Apache专家风采。</em></p>
+
+<p>2018年10月13日下午，开源微服务项目ServiceComb的团队邀请Apache基金会三位专家成员：Apache孵化器主席Justin Mclean，Apache董事会董事Roman Shaposhnik, 以及Apache基金会秘书长兼形象大使Craig Rossell，与国内Apache项目开发者相聚于上海。针对开发者所关心的<strong>Apache精英管理模式</strong>、从<strong>孵化器毕业成为顶级项目</strong>以及<strong>开源软件的商业化</strong>等主题进行了深入的交流。本文对活动当日的交流进行了纪实和总结。</p>
+
+<p>（现场为英文分享，本文对其进行翻译整理和校正归纳）</p>
+
+<hr />
+<h3 id="开场介绍">开场介绍</h3>
+
+<p>[姜宁]今天咱们聚集了国内大部分的Apache相关项目的committer，这些项目包括Beam、ServiceComb、Dubbo、Gearpump、Griffin、Kerlin、Skywalking和Weex。这些Apache项目大部分都还在孵化器中孵化，同时还有一些准备进入Apache孵化的项目。</p>
+
+<p>我在2006年9月作为Apache CXF 项目 初始 committer与Apache软件基金会结缘，2011年1月正式成为 Apache基金会成员。我作为基金会项目导师（Mentor）参与了多个来自中国的Apache孵化器项目。2017年，我作为项目负责人推动ServiceComb进入Apache 孵化器进行孵化，现在 ServiceComb已经很快就要从Apache孵化器毕业了。</p>
+
+<p>虽然参与了许多Apache开源项目，坦白地说我对Apache的项目孵化流程并未有系统化全面的理解。直到ServiceComb这个项目，我经历了寻找Mentor，捐赠协议签署，迁移项目，孵化器发版，以及毕业准备这些流程之后，才对Apache孵化器孵化流程有了更加深刻的认识。</p>
+
+<p>就在刚刚的交流中，我发现大家最关心的问题就是如何从Apache孵化器毕业。 我们今天邀请到远道而来的Apache Member，Roman，Justin，Craig，和国内Apache项目开发者一起分享他们有关Apache孵化器孵化经验，以及开源相关的感悟。</p>
+
+<hr />
+<h4 id="如何从apache软件基金会孵化器毕业成为顶级项目">如何从Apache软件基金会孵化器毕业成为顶级项目</h4>
+
+<p>[Justin]</p>
+
+<p>从Apache孵化器毕业，首要为孵化项目构建一个社区，项目毕业意味着很多事情，比如要<strong>保持开发者的多样性</strong>，项目贡献者不能仅仅来自一个公司。此外，还应该尝试小版本发布（<strong>make micro releases</strong>）。</p>
+
+<p>[Roman]</p>
+
+<p>发布版本时，除了项目本身，还有许多合规性工作（mechanical stuff）要做，例如开源协议，发版签名，发版投票等等。项目进入孵化器后，要尽快尝试发布第一个版本。许多孵化项目（podling）都想在发布版本时中搞定这样或那样的功能，我总是跟他们说，没关系，<strong>项目不一定能够跑起来，甚至不一定能成功编译，一定要先把合规性问题解决</strong>，然后再专注于功能开发。</p>
+
+<p>[Justin]</p>
+
+<p>没错，要尽早发版、多做发版。</p>
+
+<p>[姜宁]</p>
+
+<p><strong>发布版本尽管痛苦，但是要尽早去做</strong>。ServiceComb在发布第一个版本时，团队也非常痛苦，但是经历过这个阶段，后面会变得越来越顺利。</p>
+
+<p><strong><u>总结：孵化器毕业要点解读</u></strong></p>
+
+<ul>
+  <li><strong><u>构建社区</u></strong></li>
+</ul>
+
+<p><u>ASF一直坚信好的软件是由强大的社区构建出来的。诚然，代码是一个软件社区的重中之重，但Apache之道**”Community over code”**同样强调社区的重要性。它意味着我们的行事方式，如何看待彼此，如何进行决策，甚至如何编写代码。健康、互相尊重的社区非常重要，这不仅让社区的开发者有被尊重的感觉，也会带来切实的好处。一个健康、多样、包容的社区，可以促进项目不断成长，可持续发展。甚至，有助于用开源技术提供服务的公司获得商业上的成功。</u></p>
+
+<ul>
+  <li><strong><u>保持贡献者多样性</u></strong></li>
+</ul>
+
+<p><u>ASF非常强调**多样性原则**。 大部分开源软件项目都是创新型项目，多样性保证了开源项目的持续创新， 也保证了社区的健康发展。 开源项目鼓励所有个体或公司参与， 让他们感觉能对项目有所掌控，或者会对项目产生一定影响。这样可以保证意见的多样性、用户的多样性、系统的的多样性。Apache项目通常是要求有三个以上不同公司的人参与开发，以保证项目不会因为其中某个公司的退出而终止。</u></p>
+
+<ul>
+  <li>** <u>尽早、尽量多的进行版本发布</u>**</li>
+</ul>
+
+<h4 id="对于构建持续增长的社区有何建议">对于构建持续增长的社区，有何建议？</h4>
+
+<p><strong><em>[郑士汉，Weex]：社区建设、多样性对于毕业非常重要，您能给出一些相关建议吗？</em></strong></p>
+
+<p>[Justin]</p>
+
+<p>要让大家觉得自己是受欢迎的。当有人在邮件列表中提问时，我通常会<strong>分配PMC成员关注问题，并咨询提问者是否还需要其他帮助</strong>，或者有其他问题，我把这个作为日常工作。这样也有利于开发者从用户变成提交者甚至PMC成员。<strong>良好的文档可以让大家更容易使用你的项目</strong>。而文档的缺失则可能造成用户的流失，人们编译编译代码，就再也不使用这个项目了，因为项目上手太难了。</p>
+
+<p>[Roman]</p>
+
+<p>良好的文档确实非常重要。此外，我也有其他方面的建议。Apache软件基金会参与了一些项目，吸引了不少开贡献者。我们一直指导Google代码夏令营活动，夏令营由Google赞助，帮开发者更好的发展他们自己的项目。<strong>如果你可以让自己的社区参加类似的活动，对于社区建设无疑是有很大帮助的</strong>。因为大家来自中国的社区，我也建议一些中国的大公司，例如华为，也可以举办类似的学生项目，学生是一个项目最好的新鲜血液。</p>
+
+<p>[Justin]</p>
+
+<p>在会议中分享项目、建立技术博客也是不错的方式。</p>
+
+<p>[吴晟，Skywalking]</p>
+
+<p>Skywalking是中国开发者发起的一个Apache孵化项目，刚加入孵化时只有15个committer，而现在，代码层面的提交者已经达到了70人。我们提倡大家提交小的改动，这样很容易提交代码来做贡献，所以我们每次发布版本都会吸引一些开发者。当我们没有太多精力投入到测试时，我们会吸引开发者来提供测试，他们可以提交集成测试结果，可以提交测试模型，<strong>只要保持正确的编程风格，PMC的成员就可以进行审查，并合并代码</strong>。</p>
+
+<p>[Justin]</p>
+
+<p>这里我想多提一点，很多项目过于注重质量。有些Apache项目收到一些代码不太完美的提交，就直接丢弃了这些提交，然后自己从头搞起。其实这并没有关系，<strong>如果你收到了不太完美的PR，可以请社区成员帮忙改进质量</strong>。另外，在JIRA或Github上浏览issue时，如果发现一些比较简单的issue，你可以加个”<strong>easy to fix</strong>”标签，告诉大家这个issue比较容易解决，这样也可以吸引人来贡献。</p>
+
+<p>[吴晟]</p>
+
+<p>没错，我们也会跟踪一些讨论，有些时候我们可能会考虑过于理想的方案。但是好的项目有时候并不完全是完美的代码决定的，还要考虑不同的场景。这样项目才能不断壮大。</p>
+
+<p>[姜宁]</p>
+
+<p>我也谈谈自己的感受，我非常赞同Justin所说的“Low the bar”。我在参与Apache Camel项目开发时，它已经非常成熟了，但是我们还采用先提交后Review的方式进开发。 有很多人为Camel提交Patch，<strong>我们从来不说“No”</strong>。有些人提交的代码质量可能并不太好，我们还是会接受这些补丁，让贡献者觉得自己得到认可。这样，开发者就不会想“啊，我还不够优秀，还无法成为committer，我提交的补丁也不够好，那我还是不提交补丁了。” <strong>在我们合入代码时候，也会顺道帮助修复一下补丁上面的问题</strong>。 顺便说一句，Apache Camel现在有200多个组件，目前项目只有大概4，5个人在维护，很大程度上是得益与这种降低社区门槛的方式。</p>
+
+<p><strong><u>总结：构建社区的建议</u></strong></p>
+
+<ul>
+  <li><strong><u>让大家觉得自己是受欢迎的。</u></strong></li>
+  <li><strong><u>编写良好的文档，降低初学者入门难度。</u></strong></li>
+  <li><strong><u>参与或组织类似Google代码夏令营的学生项目。</u></strong></li>
+  <li><strong><u>在技术会议中分享项目经验，建立技术博客传播技术。</u></strong></li>
+  <li><strong><u>提倡小的改动，乐于接受他人的贡献，乐于帮助改进质量，让开发者更容易参与社区贡献。</u></strong></li>
+</ul>
+
+<h4 id="项目的提交者和pmc成员不够活跃我应该怎么办">项目的提交者和PMC成员不够活跃，我应该怎么办？</h4>
+
+<p><strong><em>[史少锋，Kerlin]：有些开发者成为提交者后就消失了，有时候PMC成员也不能非常及时的审查提交，有没有什么规则推动大家活跃起来？</em></strong></p>
+
+<p>[Justin]</p>
+
+<p>我觉得提交者或者PMC成员不活跃并不是问题，不是所有人都必须活跃。但是如果项目的导师不活跃就是问题了，因为导师要指导项目，告诉项目成员正确的做事方法。我们没办法为提交者和PMC成员制定“（及时反馈的）规则”，这样对他们要求太高了。<strong>我们应该降低门槛，让更多人参与进来</strong>。</p>
+
+<p>[Roman]</p>
+
+<p>通常，每个项目的PMC都有VP（Vice President），VP主要负责合规性相关的工作，向Apache董事会汇报，但是VP也要担当起项目的领导者角色。<strong>即便所有其他PMC成员都在沉睡，VP也是唯一要保持清醒的人</strong>。VP是默认的那个要回答问题的人，当然不是技术相关的问题，而是回答管理流程相关的问题。如果邮件列表无人响应，你要写信给VP，告诉他，“嘿，大家似乎都睡着了，我们应该怎么办呢？”。VP有权利做出改变，他可以组织大家开始审查提交，让大家醒过来。</p>
+
+<p><strong><u>总结：PMC沉睡了怎么办</u></strong></p>
+
+<ul>
+  <li><strong><u>Apache基金会是个公益组织，不能通过强制要求来约束成员。</u></strong></li>
+  <li><strong><u>可以通过降低门槛，让更多人可以参与进来，解决社区响应不及时的问题。</u></strong></li>
+  <li><strong><u>VP承担项目领导责任，要时刻保持活跃。遇到问题可以向VP寻求帮助</u></strong></li>
+</ul>
+
+<p><u>在Apache软件基金会的组织结构中，Apache董事会根据基金会的管理原则，负责管理和监督对外合作的商业和事务，包括基金、知识资产、注册商标等。每个Apache项目都有一个PMC（项目管理委员会），负责项目的管理和监督，并定期向Apache董事会汇报项目情况。PMC有一位主席（Chairperson），也被称为该项目的Vice President，简称VP。VP由董事会指定，是董事会和项目之间的接口人，负责项目汇报、同时与PMC一同保证项目和代码遵从法规、管理商标事务、管理邮件列表等合规性问题，发展新的Committer和PMC成员。</u></p>
+
+<h4 id="发版投票过程漫长如何保持正确的发版姿势">发版投票过程漫长，如何保持正确的发版“姿势”？</h4>
+
+<p><strong><em>[张天伦，Gearpump]：发版投票需要经过至少72+72个小时，过程非常漫长，又担心犯错误导致投票过少进而导致发版失败。并且，有时候发起投票，响应的人比较少。</em></strong></p>
+
+<p>[Justin]</p>
+
+<p>犯一次错误没关系，可以向导师寻求帮助以避免重复多次犯错误。<strong>在开始的一两次发版中，有一些错误很正常，但是后续的版本发布就会越来越顺利</strong>。如果发版时响应人数比较少，可以直接在邮件列表中提醒孵化器项目管理委员会（IPMC）成员，特别是导师，进行投票。</p>
+
+<p>[Roman]</p>
+
+<p>我想大家对敏捷开发都比较熟悉，敏捷开发提倡小幅度的改动，多进行更新。如果你的项目遵循敏捷开发方式，将对版本发布大有裨益。我指导项目孵化时，除了首次发版需要在合规性方面花费很多时间，后面的版本尽量在每个月或每两个月发布一次，新版本不一定要加入很多功能，每月发一次版本，更容易让IPMC的成员审查新版本的变动。因此，<strong>首次发版，解决合规性问题，然后尽快发版，多做发版</strong>。</p>
+
+<p>[Justin]</p>
+
+<p>另外，可以将新版本改动写入版本说明中，可以让审查工作变得轻松很多。</p>
+
+<p>[Roman]</p>
+
+<p>没错，小幅度迭代也可以帮你构建社区。社区贡献者提交的补丁越小，越容易进行审查。</p>
+
+<p><strong><u>总结：在Apache孵化器发布版本的要点</u></strong></p>
+
+<ul>
+  <li><strong><u>不要担心在发版时犯错误，大胆的向导师和IPMC成员寻求帮助，但要避免犯重复的错误</u></strong></li>
+  <li><strong><u>借鉴敏捷开发模式，小版本迭代，频繁更新</u></strong></li>
+  <li><strong><u>首次发版扫除一切合规性问题，后续版本专注功能和质量</u></strong></li>
+  <li><strong><u>让版本更新更容易审查</u></strong></li>
+</ul>
+
+<h4 id="如何使用开源软件进行商业化">如何使用开源软件进行商业化？</h4>
+
+<p>[Roman]</p>
+
+<p>开源商业化的模式是多种多样的。红帽（RedHat）就是一个很成功的例子，他们用开源收益颇丰。也有一些新的公司，例如我曾工作过的Cloudera，利用开源赚钱，至少赚到了买下Hortonworks公司的钱（众人笑）。</p>
+
+<p>我大致可以列出3种开源商业化的模式。首先，几乎所有云服务厂商都使用开源产品，将其<strong>变成服务</strong>来进行营利，这就是一个很常见的商业化模式。例如，我很惊喜地看到华为云的流服务使用了Apache Flink，这就是华为使用开源盈利的方式。</p>
+
+<p>另外一种比较传统但应用广泛的商模式，<strong>以开源软件为核心构建产品，并提供额外的组件和技术</strong>。这些额外的部分不一定是开源的。例如你的产品可以用Apache项目作为核心，然后加入GPL协议的组件，再加上一些私有的组件，然后就可以像微软出售Windows系统，或者Adobe出售Adobe Creative Suite那样盈利了。</p>
+
+<p>第三种商业化模式，就是<strong>基于开源软件提供差异化的集成服务或者解决方案</strong>。将开源软件集成为一个更大的系统，提供给客户以进行营利。你可以运营一个专业的服务公司，用开源软件帮助用户简化业务。例如，你的公司服务于酒店或工厂，帮他们实现自动化运维。客户并不在乎你用什么软件或技术，他们只关心端到端的方案能够顺利实施。你的公司使用开源软件，可以按照自己的需求进行优化，也避免了收费的商业软件侵占你的利润。</p>
+
+<p>[Craig]</p>
+
+<p>在培训行业，经常有公司需要培训自己的员工来学习、使用Apache软件。我们曾短暂的考虑过和商业公司合作提<strong>供培训服务</strong>，然后与商业公司分享利润。但是这个念头只是一闪而过就被我们否决了，这样会与提供Apache软件培训服务的人形成竞争，这样有悖于Apache厂商中立的原则。所以，<strong>如果你想通过开源软件培训来盈利，大胆去做，这也是一个不错的开源商业化模式</strong>。</p>
+
+<p><strong><u>总结：开源商业化的几种方式</u></strong></p>
+
+<ul>
+  <li><strong><u>用开源软件提供服务，例如那些云服务厂商</u></strong></li>
+  <li><strong><u>基于开源软件提供额外的收费功能</u></strong></li>
+  <li><strong><u>利用开源软件提供集成服务，并提供商业支持</u></strong></li>
+  <li><strong><u>开展开源软件的培训服务</u></strong></li>
+</ul>
+
+<hr />
+<h3 id="活动尾声">活动尾声</h3>
+
+<p>经过一番深入的沟通和交流，现场的开发者对Apache基金会、基金会的精英管理模式、Apache孵化器的运作模式都有了进一步的了解。在meetup活动的最后，三位Apache专家带领现场所有开发者进行了“Apache问答”小游戏。问答题目由Justin编写，公布在网站https://rawgit.com/justinmclean/ApacheQuiz/master/compiled/index.html 上，问题有不同的难度等级，涉及Apache基金会的管理模式、Apache开源协议、版本发布注意事项、三方软件集成等。三位专家与开发者一起答题，并对题目进行了风趣幽默的解读。最终，活动在一片欢笑声中结束，三位专家与开发者进行合影留念。</p>
+
+<p><img src="/assets/images/apache-developers-gathering-shanghai.jpg" alt="apache-developers-gathering" /></p>
+
+<hr />
+<h3 id="关于apache-servicecomb">关于Apache ServiceComb</h3>
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+    <meta itemprop="headline" content="OpenAPI V3 Spec校验工具">
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+      
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+            <h1 class="page__title" itemprop="headline">OpenAPI V3 Spec校验工具
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#项目结构" id="markdown-toc-项目结构">项目结构</a></li>
+  <li><a href="#合规性校验" id="markdown-toc-合规性校验">合规性校验</a>    <ul>
+      <li><a href="#一些字符串匹配规则" id="markdown-toc-一些字符串匹配规则">一些字符串匹配规则</a></li>
+      <li><a href="#openapi-object-doc" id="markdown-toc-openapi-object-doc">OpenAPI Object doc</a></li>
+      <li><a href="#info-object-doc" id="markdown-toc-info-object-doc">Info Object doc</a></li>
+      <li><a href="#tag-object-doc" id="markdown-toc-tag-object-doc">Tag Object doc</a></li>
+      <li><a href="#paths-object-doc" id="markdown-toc-paths-object-doc">Paths Object doc</a></li>
+      <li><a href="#path-item-object-doc" id="markdown-toc-path-item-object-doc">Path Item Object doc</a></li>
+      <li><a href="#operation-object-doc" id="markdown-toc-operation-object-doc">Operation Object doc</a></li>
+      <li><a href="#parameter-object-doc" id="markdown-toc-parameter-object-doc">Parameter Object doc</a></li>
+      <li><a href="#request-body-object-doc" id="markdown-toc-request-body-object-doc">Request Body Object doc</a></li>
+      <li><a href="#media-type-object-doc" id="markdown-toc-media-type-object-doc">Media Type Object doc</a></li>
+      <li><a href="#responses-object-doc" id="markdown-toc-responses-object-doc">Responses Object doc</a></li>
+      <li><a href="#response-object-doc" id="markdown-toc-response-object-doc">Response Object doc</a></li>
+      <li><a href="#schema-object-doc" id="markdown-toc-schema-object-doc">Schema Object doc</a></li>
+      <li><a href="#encoding-object-doc" id="markdown-toc-encoding-object-doc">Encoding Object doc</a></li>
+      <li><a href="#header-object-doc" id="markdown-toc-header-object-doc">Header Object doc</a></li>
+      <li><a href="#components-object-doc" id="markdown-toc-components-object-doc">Components Object doc</a></li>
+    </ul>
+  </li>
+  <li><a href="#兼容性检查" id="markdown-toc-兼容性检查">兼容性检查</a>    <ul>
+      <li><a href="#paths-object-doc-1" id="markdown-toc-paths-object-doc-1">Paths Object doc</a></li>
+      <li><a href="#path-item-object-doc-1" id="markdown-toc-path-item-object-doc-1">Path Item Object doc</a></li>
+      <li><a href="#operation-object-doc-1" id="markdown-toc-operation-object-doc-1">Operation Object doc</a></li>
+      <li><a href="#parameter-object-doc-1" id="markdown-toc-parameter-object-doc-1">Parameter Object doc</a></li>
+      <li><a href="#request-body-object-doc-1" id="markdown-toc-request-body-object-doc-1">Request Body Object doc</a></li>
+      <li><a href="#media-type-object-doc-1" id="markdown-toc-media-type-object-doc-1">Media Type Object doc</a></li>
+      <li><a href="#responses-object-doc-1" id="markdown-toc-responses-object-doc-1">Responses Object doc</a></li>
+      <li><a href="#response-object-doc-1" id="markdown-toc-response-object-doc-1">Response Object doc</a></li>
+      <li><a href="#schema-object-doc-1" id="markdown-toc-schema-object-doc-1">Schema Object doc</a></li>
+      <li><a href="#用做请求时" id="markdown-toc-用做请求时">用做请求时</a></li>
+      <li><a href="#用做响应时" id="markdown-toc-用做响应时">用做响应时</a></li>
+      <li><a href="#encoding-object-doc-1" id="markdown-toc-encoding-object-doc-1">Encoding Object doc</a></li>
+      <li><a href="#header-object-doc-1" id="markdown-toc-header-object-doc-1">Header Object doc</a></li>
+      <li><a href="#components-object-doc-1" id="markdown-toc-components-object-doc-1">Components Object doc</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="项目结构">项目结构</h2>
+
+<ul>
+  <li>oas-validator-core，核心API及骨架实现</li>
+  <li>oas-validator-core-spring，骨架的Spring Boot Starter</li>
+  <li>oas-validator-test，核心API的测试帮助类</li>
+  <li>oas-validator-compliance，合规性校验实现</li>
+  <li>oas-validator-compliance-spring，合规性校验的Spring Boot Starter</li>
+  <li>oas-validator-compatibility，兼容性校验实现</li>
+  <li>oas-validator-compatibility-spring，兼容性校验实现的Spring Boot Starter</li>
+  <li>oas-validator-web，校验工具的操作UI</li>
+</ul>
+
+<h2 id="合规性校验">合规性校验</h2>
+
+<p>OAS必须符合<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md">OAS 3.0.2规范</a>（比如属性的名称、REQUIED要求）。除此之外则是我们自己的定义的合规性检查。</p>
+
+<h3 id="一些字符串匹配规则">一些字符串匹配规则</h3>
+
+<ul>
+  <li><a name="lower-camel-case"></a>Lower Camel Case：首字母小写的驼峰，对应的正则<code class="highlighter-rouge">^[a-z]+((\d)|([A-Z0-9][a-z0-9]+))*([A-Z])?$</code></li>
+  <li><a name="upper-camel-case"></a>Upper Camel Case：首字母大写的驼峰，对应的正则<code class="highlighter-rouge">^[A-Z]([a-z0-9]+[A-Z]?)*$</code></li>
+  <li><a name="upper-hyphen-case"></a>Upper Hyphen Case：单词首字母大写，多个单词用<code class="highlighter-rouge">-</code>连接，比如<code class="highlighter-rouge">Content-Type</code>、<code class="highlighter-rouge">Accept</code>、<code class="highlighter-rouge">X-Rate-Limit-Limit</code>。对应的正则：<code class="highlighter-rouge">^([A-Z][a-z0-9]*-)*([A-Z][a-z0-9]*)$</code></li>
+</ul>
+
+<h3 id="openapi-object-doc">OpenAPI Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#openapi-object">doc</a></h3>
+
+<p><a name="openapi-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">openapi</code>属性必须为3.0.x且&gt;=3.0.2</li>
+  <li><code class="highlighter-rouge">info</code>属性见<a href="#info-compliance">Info Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">paths</code>属性，必须提供见<a href="#paths-compliance">Paths Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">components</code>属性见<a href="#components-compliance">Components Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">tags</code>属性，至少提供一个<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#tagObject">Tag Object</a>
+    <ul>
+      <li>见<a href="#tag-compliance">Tag Object合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">security</code>属性，不允许提供</li>
+</ul>
+
+<h3 id="info-object-doc">Info Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#infoObject">doc</a></h3>
+
+<p><a name="info-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code>属性，必须填写</li>
+</ul>
+
+<h3 id="tag-object-doc">Tag Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#tagObject">doc</a></h3>
+
+<p><a name="tag-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">name</code>属性，必须是<a href="#upper-camel-case">Upper Camel Case</a></li>
+  <li><code class="highlighter-rouge">description</code>属性，必须填写</li>
+  <li>不得存在<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">Operation Object</a>没有引用过的tag</li>
+</ul>
+
+<h3 id="paths-object-doc">Paths Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#paths-object">doc</a></h3>
+
+<p><a name="paths-compliance"></a></p>
+
+<ul>
+  <li>path必须是<a href="#lower-camel-case">Lower Camel Case</a>，包括<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#path-templating">Path Templating</a>中的变量
+    <ul>
+      <li>见<a href="#path-item-compliance">Path Item Object合规性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="path-item-object-doc">Path Item Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#pathItemObject">doc</a></h3>
+
+<p><a name="path-item-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">get/post/put/delete/...</code>属性，见<a href="operation-compliance">Operation Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">parameters</code>属性，见<a href="#parameter-compliance">Parameter Object合规性检查</a></li>
+</ul>
+
+<h3 id="operation-object-doc">Operation Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">doc</a></h3>
+
+<p><a name="operation-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">summary</code>属性、必须填写</li>
+  <li><code class="highlighter-rouge">operationId</code>属性，且<a href="#lower-camel-case">Lower Camel Case</a></li>
+  <li><code class="highlighter-rouge">parameters</code>属性，见<a href="#parameter-compliance">Parameter Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">requestBody</code>属性，见<a href="#request-body-compliance">Request Body Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">responses</code>属性，见<a href="#responses-compliance">Responses Object合规性检查</a></li>
+  <li>
+    <p><code class="highlighter-rouge">tags</code>属性，且只能写一个tag，且必须在<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#openapi-object">OpenAPI Object</a> 的 <code class="highlighter-rouge">tags</code>属性里所定义的范围内</p>
+  </li>
+  <li><code class="highlighter-rouge">servers</code>属性，不允许提供</li>
+</ul>
+
+<h3 id="parameter-object-doc">Parameter Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">doc</a></h3>
+
+<p><a name="parameter-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code>属性，必须填写</li>
+  <li><code class="highlighter-rouge">name</code>属性
+    <ul>
+      <li>如果<code class="highlighter-rouge">in</code>为path、query、cookie，则那么必须是<a href="#lower-camel-case">Lower Camel Case</a></li>
+      <li>如果<code class="highlighter-rouge">in</code>为header，则那么必须是<a href="#upper-hyphen-case">Upper Hyphen Case</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">schema</code>属性，见<a href="#schema-compliance">Schema Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">content</code>属性，见<a href="#media-type-compliance">Media Type Object合规性检查</a></li>
+</ul>
+
+<h3 id="request-body-object-doc">Request Body Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject">doc</a></h3>
+
+<p><a name="request-body-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code>属性，必须填写</li>
+  <li><code class="highlighter-rouge">content</code>属性，见<a href="#media-type-compliance">Media Type Object合规性检查</a></li>
+</ul>
+
+<h3 id="media-type-object-doc">Media Type Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object">doc</a></h3>
+
+<p><a name="media-type-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schema</code>属性，必须填写。见<a href="#schema-compliance">Schema Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">encoding</code>属性，见<a href="#encoding-compliance">Encoding Object合规性检查</a></li>
+</ul>
+
+<h3 id="responses-object-doc">Responses Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject">doc</a></h3>
+
+<p><a name="responses-compliance"></a></p>
+
+<ul>
+  <li>见<a href="#response-compliance">Response Object合规性检查</a></li>
+</ul>
+
+<h3 id="response-object-doc">Response Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object">doc</a></h3>
+
+<p><a name="response-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code>属性，必须填写</li>
+  <li><code class="highlighter-rouge">headers</code>属性，name（<code class="highlighter-rouge">headers</code>的key）必须是<a href="#upper-hyphen-case">Upper Hyphen Case</a>
+    <ul>
+      <li>见<a href="#header-compliance">Header Object合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">content</code>属性，见<a href="#media-type-compliance">Media Type Object合规性检查</a></li>
+</ul>
+
+<h3 id="schema-object-doc">Schema Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject">doc</a></h3>
+
+<p><a name="schema-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">title</code>属性，如果上级是<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject">Schema Object</a>或<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">Components Object</a>，那么必须填写</li>
+  <li><code class="highlighter-rouge">properties</code>属性，name（<code class="highlighter-rouge">properties</code>的key）必须是<a href="#lower-camel-case">Lower Camel Case</a>
+    <ul>
+      <li>Sub Schema见<a href="#schema-compliance">Schema Object合规性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="encoding-object-doc">Encoding Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#encodingObject">doc</a></h3>
+
+<p><a name="encoding-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">headers</code>属性，name（<code class="highlighter-rouge">headers</code>的key）必须是<a href="#upper-hyphen-case">Upper Hyphen Case</a>
+    <ul>
+      <li>见<a href="#header-compliance">Header Object合规性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="header-object-doc">Header Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">doc</a></h3>
+
+<p><a name="header-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code>属性，必须填写</li>
+  <li><code class="highlighter-rouge">schema</code>属性，见<a href="#schema-compliance">Schema Object合规性检查</a></li>
+  <li><code class="highlighter-rouge">content</code>属性，见<a href="#media-type-compliance">Media Type Object合规性检查</a></li>
+</ul>
+
+<h3 id="components-object-doc">Components Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">doc</a></h3>
+
+<p><a name="components-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schemas</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>见<a href="#schema-compliance">Schema Object合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">responses</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>见<a href="#response-compliance">Response Object合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">parameters</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>见<a href="#parameter-compliance">Parameter Object合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">examples</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a></li>
+  <li><code class="highlighter-rouge">requestBodies</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>见<a href="#request-body-compliance">Request Body合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">headers</code>属性，name必须是<a href="#upper-hyphen-case">Upper Hyphen Case</a>
+    <ul>
+      <li>见<a href="#header-compliance">Header合规性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">links</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a></li>
+  <li><code class="highlighter-rouge">callbacks</code>属性，name必须是<a href="#upper-camel-case">Upper Camel Case</a></li>
+</ul>
+
+<h2 id="兼容性检查">兼容性检查</h2>
+
+<p>对新旧两个版本的OAS做兼容性检查。</p>
+
+<p>OAS可以使用<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object">Reference Object</a>来描述Spec，两个不同的OAS会出现描述不同但语义相同的情况。比如下面的旧OAS没有使用<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object">Reference Object</a>，而新OAS则使用了的情况：</p>
+
+<p>旧OAS</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">openapi</span><span class="pi">:</span> <span class="s2">"</span><span class="s">3.0.0"</span>
+<span class="na">info</span><span class="pi">:</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">1.0.0</span>
+  <span class="na">title</span><span class="pi">:</span> <span class="s">Swagger Petstore</span>
+  <span class="na">license</span><span class="pi">:</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">MIT</span>
+<span class="na">servers</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="na">url</span><span class="pi">:</span> <span class="s">http://petstore.swagger.io/v1</span>
+<span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/pets</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">summary</span><span class="pi">:</span> <span class="s">List all pets</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">listPets</span>
+      <span class="na">requestBody</span><span class="pi">:</span>
+        <span class="na">content</span><span class="pi">:</span>
+          <span class="s">application/json</span><span class="pi">:</span>
+            <span class="na">schema</span><span class="pi">:</span>
+              <span class="na">type</span><span class="pi">:</span> <span class="s">array</span>
+              <span class="na">items</span><span class="pi">:</span>
+                <span class="na">type</span><span class="pi">:</span> <span class="s">object</span>
+                <span class="na">properties</span><span class="pi">:</span>
+                  <span class="na">Foo</span><span class="pi">:</span>
+                    <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="s1">'</span><span class="s">200'</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">A paged array of pets</span>
+</code></pre></div></div>
+
+<p>新OAS</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/pets</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">listPets</span>
+      <span class="na">requestBody</span><span class="pi">:</span>
+        <span class="na">content</span><span class="pi">:</span>
+          <span class="s">application/json</span><span class="pi">:</span> 
+            <span class="na">schema</span><span class="pi">:</span>
+              <span class="s">$ref</span><span class="pi">:</span> <span class="s1">'</span><span class="s">#/components/schemas/Foo'</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="s1">'</span><span class="s">200'</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">A paged array of pets</span>
+<span class="na">components</span><span class="pi">:</span>
+  <span class="na">schemas</span><span class="pi">:</span>
+    <span class="na">Foo</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">array</span>
+      <span class="na">items</span><span class="pi">:</span>
+        <span class="na">type</span><span class="pi">:</span> <span class="s">object</span>
+        <span class="na">properties</span><span class="pi">:</span>
+          <span class="na">Foo</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+</code></pre></div></div>
+
+<p>因此在检查兼容性的时候会将新旧OAS的<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object">Reference Object</a>做解析，然后再检查，下面是一段<a href="https://github.com/swagger-api/swagger-parser">swagger-parser</a>的例子：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">OpenAPIV3Parser</span> <span class="n">parser</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">OpenAPIV3Parser</span><span class="o">();</span>
+
+<span class="nc">ParseOptions</span> <span class="n">parseOptions</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">ParseOptions</span><span class="o">();</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setResolve</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setResolveCombinators</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setResolveFully</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setFlatten</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span>
+
+<span class="nc">SwaggerParseResult</span> <span class="n">parseResult</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="na">readContents</span><span class="o">(</span><span class="n">content</span><span class="o">,</span> <span class="kc">null</span><span class="o">,</span> <span class="n">parseOptions</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p>因此，检查下来如果发现不兼容，那么所报告的位置会和原文档有所不同。</p>
+
+<h3 id="paths-object-doc-1">Paths Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#paths-object">doc</a></h3>
+
+<p><a name="paths-compatibility"></a></p>
+
+<ul>
+  <li>新OAS必须包含旧OAS的所有的<code class="highlighter-rouge">path</code>，如果<code class="highlighter-rouge">path</code>使用了<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#path-templating">Path Templating</a>，只要变量名发生了变化，那么即使语义上相同也会被认为不同，比如<code class="highlighter-rouge">/pets/{foo}</code>和<code class="highlighter-rouge">/pets/{bar}</code>会被认定为不同。
+    <ul>
+      <li>见<a href="#path-item-compatibility">Path Item Object兼容性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="path-item-object-doc-1">Path Item Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#pathItemObject">doc</a></h3>
+
+<p><a name="path-item-compatibility"></a></p>
+
+<ul>
+  <li>新OAS必须包含旧OAS的所有的get/put/post/delete/…<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">Operation Object</a></li>
+</ul>
+
+<h3 id="operation-object-doc-1">Operation Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">doc</a></h3>
+
+<p><a name="operation-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">operationId</code>属性，新旧OAS必须完全一致。</li>
+  <li><code class="highlighter-rouge">parameters</code>属性，对它检查须在考虑到<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#user-content-pathitemparameters">Path Item Object parameters属性</a>的情况下进行：
+    <ul>
+      <li>新OAS可以新增<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>，但是新增的<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>的<code class="highlighter-rouge">required</code>属性必须为<code class="highlighter-rouge">false</code></li>
+      <li>新OAS可以删除<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a></li>
+      <li>针对单个<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>的修改的检查见<a href="#parameter-compatibility">Parameter Object兼容性检查</a>（在同一个<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">Operation Object</a>下<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>依靠<code class="highlighter-rouge">name</code>和<code class="highlighter-rouge">in</code>两个属性作为ID）。</li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">requestBody</code>属性，见<a href="#request-body-compatibility">Request Body Object兼容性检查</a></li>
+  <li><code class="highlighter-rouge">responses</code>属性，见<a href="#responses-compatibility">Responses Object兼容性检查</a></li>
+</ul>
+
+<h3 id="parameter-object-doc-1">Parameter Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">doc</a></h3>
+
+<p><a name="parameter-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">required</code>属性，只允许<code class="highlighter-rouge">true(旧) -&gt; false(新)</code></li>
+  <li><code class="highlighter-rouge">allowEmptyValue</code>属性，只允许<code class="highlighter-rouge">false(旧) -&gt; true(新)</code>的变化</li>
+  <li><code class="highlighter-rouge">style</code>属性，新旧OAS必须保持一致</li>
+  <li><code class="highlighter-rouge">explode</code>属性，新旧OAS必须保持一致</li>
+  <li><code class="highlighter-rouge">allowReserved</code>属性，只允许<code class="highlighter-rouge">false(旧) -&gt; true(新)</code>的变化</li>
+  <li><code class="highlighter-rouge">schema</code>属性，见<a href="#schema-compatibility">Schema Object兼容性检查</a></li>
+  <li><code class="highlighter-rouge">content</code>属性，新OAS必须包含旧OAS的所有media type（<code class="highlighter-rouge">content</code>的key），且不能新增media type
+    <ul>
+      <li>见<a href="#media-type-compatibility">Media Type Object兼容性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="request-body-object-doc-1">Request Body Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject">doc</a></h3>
+
+<p><a name="request-body-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">content</code>属性，新OAS必须包含旧OAS的所有media type（<code class="highlighter-rouge">content</code>的key）
+    <ul>
+      <li>见<a href="#media-type-compatibility">Media Type Object兼容性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">required</code>属性，只允许<code class="highlighter-rouge">true(旧) -&gt; false(新)</code>的变化</li>
+</ul>
+
+<h3 id="media-type-object-doc-1">Media Type Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object">doc</a></h3>
+
+<p><a name="media-type-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schema</code>属性，见<a href="#schema-compatibility">Schema Object兼容性检查</a></li>
+  <li><code class="highlighter-rouge">encoding</code>属性，该属性仅适用于<code class="highlighter-rouge">requestBody</code>，因此新旧OAS的property name（<code class="highlighter-rouge">encoding</code>的key）必须完全一致
+    <ul>
+      <li>见<a href="#encoding-compatibility">Encoding Object兼容性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="responses-object-doc-1">Responses Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject">doc</a></h3>
+
+<p><a name="responses-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">default</code>属性，如果旧OAS没有定义<code class="highlighter-rouge">default</code>，那么新OAS也不能定义<code class="highlighter-rouge">default</code>。</li>
+  <li><code class="highlighter-rouge">{Http Status Code}</code>属性，新OAS不允许新增。</li>
+  <li>见<a href="#response-compatibility">Response Object兼容性检查</a></li>
+</ul>
+
+<h3 id="response-object-doc-1">Response Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object">doc</a></h3>
+
+<p><a name="response-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">headers</code>属性，新OAS必须包含旧OAS的所有header name（<code class="highlighter-rouge">headers</code>的key），可以新增header name
+    <ul>
+      <li><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a>见<a href="#header-compatibility">Header Object兼容性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">content</code>属性，新OAS必须包含旧OAS的所有media type（<code class="highlighter-rouge">content</code>的key），可以新增media type
+    <ul>
+      <li><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object">Media Type Object</a>见<a href="#media-type-compatibility">Media Type Object兼容性检查</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="schema-object-doc-1">Schema Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject">doc</a></h3>
+
+<p><a name="schema-compatibility"></a></p>
+
+<p>OAS中定义，Schema Object可以直接或间接用在：</p>
+
+<ul>
+  <li>请求类：<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>、<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject">Request Body Object</a>、<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a></li>
+  <li>响应类：<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a>、<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object">Response Object</a></li>
+</ul>
+
+<p>不同用途的兼容性检查规则有所不同。</p>
+
+<h3 id="用做请求时">用做请求时</h3>
+
+<p>原则上，当Schema Object用在请求时，只允许从紧到松的变化。</p>
+
+<ul>
+  <li><code class="highlighter-rouge">type, format</code>组合所允许的变化范围</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>旧(type,format)</th>
+      <th>新(type,format)</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>integer, null</td>
+      <td>integer, int64<br />number, double<br />number, null</td>
+    </tr>
+    <tr>
+      <td>integer, int32</td>
+      <td>integer, int64<br />integer, null<br />number, float<br />number, double<br />number, null</td>
+    </tr>
+    <tr>
+      <td>integer, int64</td>
+      <td>integer, null<br />number, double<br />number, null</td>
+    </tr>
+    <tr>
+      <td>number, null</td>
+      <td>number, double</td>
+    </tr>
+    <tr>
+      <td>number, float</td>
+      <td>number, null<br />number, double</td>
+    </tr>
+    <tr>
+      <td>number, double</td>
+      <td>number, null</td>
+    </tr>
+    <tr>
+      <td>string, null</td>
+      <td>string, password</td>
+    </tr>
+    <tr>
+      <td>string, password</td>
+      <td>string, null</td>
+    </tr>
+  </tbody>
+</table>
+
+<ul>
+  <li><code class="highlighter-rouge">allOf</code>、<code class="highlighter-rouge">oneOf</code>、<code class="highlighter-rouge">anyOf</code>属性，在combine之后再做检查</li>
+  <li><code class="highlighter-rouge">multipleOf</code>属性，如果旧OAS为null。新OAS必须==旧OAS或者新OAS是旧OAS的因子，比如6(旧)-&gt;3(新)</li>
+  <li><code class="highlighter-rouge">maximum</code>、<code class="highlighter-rouge">maxLength</code>、<code class="highlighter-rouge">maxItems</code>、<code class="highlighter-rouge">maxProperties</code>，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须&gt;=旧OAS。</li>
+  <li><code class="highlighter-rouge">minimum</code>、<code class="highlighter-rouge">minLenght</code>、<code class="highlighter-rouge">minItems</code>、<code class="highlighter-rouge">minProperties</code>，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须&lt;=旧OAS。</li>
+  <li><code class="highlighter-rouge">exclusiveMaximum</code>、<code class="highlighter-rouge">exclusiveMinimum</code>属性，仅允许<code class="highlighter-rouge">true(旧)-&gt;false(新)</code>的变化</li>
+  <li><code class="highlighter-rouge">uniqueItems</code>属性，只允许<code class="highlighter-rouge">true(旧)-&gt;false(新)</code>的变化。</li>
+  <li><code class="highlighter-rouge">required</code>属性，新OAS必须==旧OAS，或者新OAS是旧OAS的子集。</li>
+  <li><code class="highlighter-rouge">enum</code>属性，新OAS必须==旧OAS，或者新OAS是旧OAS的超集。</li>
+  <li><code class="highlighter-rouge">properties</code>属性，新OAS可以新增property name（<code class="highlighter-rouge">properties</code>的key）或者减少property name。</li>
+  <li><code class="highlighter-rouge">nullable</code>属性，只允许<code class="highlighter-rouge">false(旧)-&gt;true(新)</code>的变化。</li>
+  <li><code class="highlighter-rouge">discriminator</code>属性，新旧OAS必须完全一致。</li>
+  <li><code class="highlighter-rouge">xml</code>属性，新旧OAS必须完全一致。</li>
+  <li><code class="highlighter-rouge">readOnly</code>、<code class="highlighter-rouge">writeOnly</code>，新旧OAS必须完全一致。</li>
+</ul>
+
+<h3 id="用做响应时">用做响应时</h3>
+
+<p>原则上，当Schema Object用在响应时，只允许从松到紧的变化。</p>
+
+<ul>
+  <li><code class="highlighter-rouge">type, format</code>组合所允许的变化范围</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>旧(type,format)</th>
+      <th>新(type,format)</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>integer, null</td>
+      <td>integer, int64<br />integer, int32</td>
+    </tr>
+    <tr>
+      <td>integer, int64</td>
+      <td>integer, null<br />interger, int32</td>
+    </tr>
+    <tr>
+      <td>number, null</td>
+      <td>number, double<br />number, float</td>
+    </tr>
+    <tr>
+      <td>number, double</td>
+      <td>number, null<br />number, float</td>
+    </tr>
+    <tr>
+      <td>string, null</td>
+      <td>string, password</td>
+    </tr>
+    <tr>
+      <td>string, password</td>
+      <td>string, null</td>
+    </tr>
+  </tbody>
+</table>
+
+<ul>
+  <li><code class="highlighter-rouge">allOf</code>、<code class="highlighter-rouge">oneOf</code>、<code class="highlighter-rouge">anyOf</code>属性，在combine之后再做检查</li>
+  <li><code class="highlighter-rouge">multipleOf</code>属性，如果旧OAS为null。新OAS必须==旧OAS或者新OAS是旧OAS的倍数，比如3(旧)-&gt;6(新)</li>
+  <li><code class="highlighter-rouge">maximum</code>、<code class="highlighter-rouge">maxLength</code>、<code class="highlighter-rouge">maxItems</code>、<code class="highlighter-rouge">maxProperties</code>，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须&lt;=旧OAS。</li>
+  <li><code class="highlighter-rouge">minimum</code>、<code class="highlighter-rouge">minLenght</code>、<code class="highlighter-rouge">minItems</code>、<code class="highlighter-rouge">minProperties</code>，如果旧OAS为null，那么新OAS也必须是null。其他情况，新OAS必须&gt;=旧OAS。</li>
+  <li><code class="highlighter-rouge">exclusiveMaximum</code>、<code class="highlighter-rouge">exclusiveMinimum</code>属性，仅允许<code class="highlighter-rouge">false(旧)-&gt;true(新)</code>的变化</li>
+  <li><code class="highlighter-rouge">uniqueItems</code>属性，只允许<code class="highlighter-rouge">false(旧)-&gt;true(新)</code>的变化。</li>
+  <li><code class="highlighter-rouge">required</code>属性，新OAS必须==旧OAS或者，新OAS是旧OAS的超集。</li>
+  <li><code class="highlighter-rouge">enum</code>属性，新OAS必须==旧OAS，或者新OAS是旧OAS的子集。</li>
+  <li><code class="highlighter-rouge">properties</code>属性，新OAS可以新增property name（<code class="highlighter-rouge">properties</code>的key）或者减少property name。</li>
+  <li><code class="highlighter-rouge">nullable</code>属性，只允许<code class="highlighter-rouge">true(旧)-&gt;false(新)</code>的变化。</li>
+  <li><code class="highlighter-rouge">discriminator</code>属性，新旧OAS必须完全一致。</li>
+  <li><code class="highlighter-rouge">xml</code>属性，新旧OAS必须完全一致。</li>
+  <li><code class="highlighter-rouge">readOnly</code>、<code class="highlighter-rouge">writeOnly</code>，新旧OAS必须完全一致。</li>
+</ul>
+
+<h3 id="encoding-object-doc-1">Encoding Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#encodingObject">doc</a></h3>
+
+<p><a name="encoding-compatibility"></a></p>
+
+<p>PS. Encoding Object仅针对Request Body Object有用</p>
+
+<ul>
+  <li><code class="highlighter-rouge">contentType</code>属性，新旧OAS必须保持一致</li>
+  <li><code class="highlighter-rouge">headers</code>属性，新OAS不能新增旧OAS的header name（<code class="highlighter-rouge">headers</code>的key），但是可以删除header name
+    <ul>
+      <li><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a>见<a href="#header-compatibility">Header Object兼容性检查</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">style</code>属性，新旧OAS必须保持一致</li>
+  <li><code class="highlighter-rouge">explode</code>属性，新旧OAS必须保持一致</li>
+  <li><code class="highlighter-rouge">allowReserved</code>属性，只允许<code class="highlighter-rouge">false(旧) -&gt; true(新)</code>的变化</li>
+</ul>
+
+<h3 id="header-object-doc-1">Header Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">doc</a></h3>
+
+<p><a name="header-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schema</code>属性，见<a href="#schema-compatibility">Schema Object兼容性检查</a></li>
+</ul>
+
+<h3 id="components-object-doc-1">Components Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">doc</a></h3>
+
+<p><a name="components-compatibility"></a></p>
+
+<p><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">Components Object</a>定义的都是可复用OAS Object，而在检查兼容性的时候所有<code class="highlighter-rouge">$ref</code>都已被解析了，因此不需要对<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">Components Object</a>的属性做兼容性检查。</p>
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+  <li><a href="#一键式微服务开发工具-toolkit" id="markdown-toc-一键式微服务开发工具-toolkit">一键式微服务开发工具 Toolkit</a></li>
+  <li><a href="#快速入门" id="markdown-toc-快速入门">快速入门</a>    <ul>
+      <li><a href="#1-从源码构建工具和插件" id="markdown-toc-1-从源码构建工具和插件">1 从源码构建工具和插件</a></li>
+      <li><a href="#2-使用toolkit-maven-plugin插件" id="markdown-toc-2-使用toolkit-maven-plugin插件">2 使用toolkit-maven-plugin插件</a></li>
+      <li><a href="#3-使用toolkit-cli工具" id="markdown-toc-3-使用toolkit-cli工具">3 使用toolkit cli工具</a></li>
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+
+<h2 id="一键式微服务开发工具-toolkit">一键式微服务开发工具 Toolkit</h2>
+<p>Apache ServiceComb Toolkit 是基于契约的微服务开发工具套件。提供契约、代码、文档相互转换及校验的能力，帮助用户一键式快速构建基于流行微服务框架和流行编程模型的微服务工程，降低微服务入门成本，使用户聚焦业务开发，提升遗留系统重构、开发效率。</p>
+
+<h2 id="快速入门">快速入门</h2>
+<h3 id="1-从源码构建工具和插件">1 从源码构建工具和插件</h3>
+<p>构建环境要求:</p>
+
+<ul>
+  <li>
+    <p><a href="http://java.oracle.com">Java 8</a></p>
+  </li>
+  <li>
+    <p><a href="http://maven.apache.org/">Apache maven 3.5.0 or greater</a></p>
+  </li>
+</ul>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 从github获取toolkit最新源码</span>
+<span class="nv">$ </span>git clone https://github.com/apache/servicecomb-toolkit.git
+<span class="nv">$ </span><span class="nb">cd </span>toolkit
+
+<span class="c"># 构建打包</span>
+<span class="nv">$ </span>mvn clean <span class="nb">install</span>
+</code></pre></div></div>
+
+<h3 id="2-使用toolkit-maven-plugin插件">2 使用toolkit-maven-plugin插件</h3>
+<h4 id="21-配置">2.1 配置</h4>
+<p>在maven项目的pom文件中配置</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- 输入源。设置为 code，表示解析当前代码；设置为 contract，表示解析指定目录的契约文件。不设置则默认为 code --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>code<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- 生成契约文件的类型，不设置则默认为 yaml --&gt;</span>
+        <span class="nt">&lt;contractFileType&gt;</span>yaml<span class="nt">&lt;/contractFileType&gt;</span>
+        <span class="c">&lt;!-- 生成文档的类型，不设置则默认为 html --&gt;</span>
+        <span class="nt">&lt;documentType&gt;</span>html<span class="nt">&lt;/documentType&gt;</span>
+        <span class="c">&lt;!-- 生成契约文件、文档的根目录，不设置则默认为运行命令所在目录下的 target 目录，生成的微服务工程在 project 目录，契约文件在 contract 目录，文档在 document 目录 --&gt;</span>
+        <span class="nt">&lt;outputDirectory&gt;</span>./target<span class="nt">&lt;/outputDirectory&gt;</span>
+        <span class="c">&lt;!-- 被解析的契约文件路径，在 sourceType 设置为 contract 时有效，且必须设置 --&gt;</span>
+        <span class="nt">&lt;contractLocation&gt;</span>./contract<span class="nt">&lt;/contractLocation&gt;</span>
+        <span class="c">&lt;!-- 被校验的契约文件目录，在 sourceType 设置为 contract 时有效，且必须设置 --&gt;</span>
+        <span class="nt">&lt;sourceContractPath&gt;</span>./target/contract<span class="nt">&lt;/sourceContractPath&gt;</span>
+        <span class="c">&lt;!-- 样本契约文件目录，必须设置 --&gt;</span>
+        <span class="nt">&lt;destinationContractPath&gt;</span>./contract<span class="nt">&lt;/destinationContractPath&gt;</span>
+        <span class="c">&lt;!-- 生成的微服务代码工程配置 --&gt;</span>
+        <span class="nt">&lt;service&gt;</span>
+            <span class="c">&lt;!-- 微服务的类型，可生成 provider/consumer/all，默认值为 all --&gt;</span>
+            <span class="nt">&lt;serviceType&gt;</span>all<span class="nt">&lt;/serviceType&gt;</span>
+            <span class="c">&lt;!-- 微服务的 groupid，用户可选，默认值为 domain.orgnization.project --&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>domain.orgnization.project<span class="nt">&lt;/groupId&gt;</span>
+            <span class="c">&lt;!-- 微服务的 artifactId，用户可选，默认值为 sample --&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>sample<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="c">&lt;!-- 微服务的 artifactVersion，用户可选，默认值为 0.1.0-SNAPSHOT --&gt;</span>
+            <span class="nt">&lt;artifactVersion&gt;</span>0.1.0-SNAPSHOT<span class="nt">&lt;/artifactVersion&gt;</span>
+            <span class="c">&lt;!-- 微服务的 packageName，用户可选，默认值为 domain.orgnization.project.sample --&gt;</span>
+            <span class="nt">&lt;packageName&gt;</span>domain.orgnization.project.sample<span class="nt">&lt;/packageName&gt;</span>
+            <span class="c">&lt;!-- 微服务框架，用户可选。设置为 ServiceComb，生成ServiceComb风格的微服务项目；设置为 SpringCloud，生成SpringCloud风格的微服务项目。默认值为 ServiceComb --&gt;</span>
+            <span class="nt">&lt;microServiceFramework&gt;</span>ServiceComb<span class="nt">&lt;/microServiceFramework&gt;</span>
+            <span class="c">&lt;!-- 服务提供者的服务id。仅包含服务消费者的场景（serviceType=consumer）必须设置该值 --&gt;</span>            
+            <span class="nt">&lt;providerServiceId&gt;</span>servicecomb-provider<span class="nt">&lt;/providerServiceId&gt;</span>
+            <span class="c">&lt;!-- 服务id，默认值为artifactId的值 --&gt;</span>
+            <span class="nt">&lt;serviceId&gt;</span>servicecomb-consumer<span class="nt">&lt;/serviceId&gt;</span>
+        <span class="nt">&lt;/service&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<h4 id="22-命令">2.2 命令</h4>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 生成契约，文档和微服务工程</span>
+mvn toolkit:generate
+
+<span class="c"># 校验代码和契约一致性</span>
+mvn toolkit:verify
+</code></pre></div></div>
+
+<h4 id="221-解析代码生成微服务代码工程openapi规范契约文档">2.2.1 解析代码，生成微服务代码工程、OpenAPI规范契约、文档</h4>
+
+<p>配置项(不显式设置 <code class="highlighter-rouge">&lt;configuration&gt;</code> 则使用默认配置)
+例：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- 输入源。设置为 code，表示解析当前代码；设置为 contract，表示解析指定目录的契约文件。不设置则默认为 code --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>code<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- 生成契约文件、文档的根目录，不设置则默认为运行命令所在目录下的 target 目录，生成的微服务工程在 project 目录，契约文件在 contract 目录，文档在 document 目录 --&gt;</span>
+        <span class="nt">&lt;outputDirectory&gt;</span>./target<span class="nt">&lt;/outputDirectory&gt;</span>
+        <span class="c">&lt;!-- 生成的微服务代码工程配置 --&gt;</span>
+        <span class="nt">&lt;service&gt;</span>
+            <span class="c">&lt;!-- 微服务的类型，可生成 provider/consumer/all，默认值为 all --&gt;</span>
+            <span class="nt">&lt;serviceType&gt;</span>all<span class="nt">&lt;/serviceType&gt;</span>
+        <span class="nt">&lt;/service&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>运行命令</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn toolkit:generate
+</code></pre></div></div>
+
+<p>代码生成契约现已支持以下注解(类级别)编写的restful接口</p>
+<blockquote>
+  <p>RestController, RestSchema, RpcSchema, RequestMapping</p>
+</blockquote>
+
+<p>代码生成契约时,restful接口方法修饰符必须指定为public</p>
+
+<h4 id="222-解析契约生成微服务工程文档">2.2.2 解析契约，生成微服务工程、文档</h4>
+
+<p>配置项(不显式设置 <code class="highlighter-rouge">&lt;configuration&gt;</code> 则使用默认配置)
+例：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- 输入源。设置为 code，表示解析当前代码；设置为 contract，表示解析指定目录的契约文件。不设置则默认为 code --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>contract<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- 被解析的契约文件路径，在 sourceType 设置为 contract 时有效，且必须设置 --&gt;</span>
+        <span class="nt">&lt;contractLocation&gt;</span>./contract<span class="nt">&lt;/contractLocation&gt;</span>
+        <span class="c">&lt;!-- 生成契约文件、文档的根目录，不设置则默认为运行命令所在目录下的 target 目录，生成的微服务工程在 project 目录，契约文件在 contract 目录，文档在 document 目录 --&gt;</span>
+        <span class="nt">&lt;outputDirectory&gt;</span>./target<span class="nt">&lt;/outputDirectory&gt;</span>
+        <span class="c">&lt;!-- 生成的微服务代码工程配置 --&gt;</span>
+        <span class="nt">&lt;service&gt;</span>
+            <span class="c">&lt;!-- 微服务的类型，可生成 provider/consumer/all，默认值为 all --&gt;</span>
+            <span class="nt">&lt;serviceType&gt;</span>provider<span class="nt">&lt;/serviceType&gt;</span>
+        <span class="nt">&lt;/service&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>运行命令</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn toolkit:generate
+</code></pre></div></div>
+
+<h4 id="223-代码和契约一致性校验">2.2.3 代码和契约一致性校验</h4>
+
+<p>配置项
+例：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- 输入源。设置为 code，表示解析当前代码；设置为 contract，表示解析指定目录的契约文件。不设置则默认为 code --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>code<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- 样本契约文件目录，必须设置 --&gt;</span>
+        <span class="nt">&lt;destinationContractPath&gt;</span>./contract<span class="nt">&lt;/destinationContractPath&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>运行命令</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn toolkit:verify
+</code></pre></div></div>
+
+<h3 id="3-使用toolkit-cli工具">3 使用toolkit cli工具</h3>
+<p>可执行jar包位于toolkit/cli/target/bin目录下</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar <span class="nb">help</span>
+</code></pre></div></div>
+<h4 id="31-契约生成微服务工程">3.1 契约生成微服务工程</h4>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar  codegenerate <span class="nt">-m</span> ServiceComb <span class="nt">-i</span> swagger.yaml <span class="nt">-o</span> ./project <span class="nt">-p</span> SpringMVC
+</code></pre></div></div>
+<blockquote>
+  <p><strong>codegenerate</strong> 命令选项说明:</p>
+  <ul>
+    <li>-m, –microservice-framework : 指定微服务框架,现支持ServiceComb<br />
+例：-m ServiceComb</li>
+    <li>-p, –programming-model : 指定编程模型，可选JAX-RS，POJO，SpringMVC，SpringBoot<br />
+例：-p SpringMvc</li>
+    <li>-i, –input : 指定遵循OpenAPI规范的契约文件，支持yaml和json格式，支持指定本地和网络文件<br />
+例：-i http://petstore.swagger.io/v2/swagger.json</li>
+    <li>-o, –output : 生成的项目代码输出路径<br />
+例：-o ./project</li>
+    <li>–group-id : 指定生成的项目的group id<br />
+例：–group-id com.demo</li>
+    <li>–artifact-id : 指定生成的项目的artifact id   <br />
+例：–artifact-id springmvc-example</li>
+    <li>–artifact-version : 指定生成的项目的artifact version<br />
+例：–artifact-version 1.0.0</li>
+    <li>–api-package : 指定生成项目的api package<br />
+例：–api-package com.demo.api</li>
+    <li>–model-package : 指定生成项目的model package <br />
+例：–model-package com.demo.model</li>
+    <li>-t, –service-type : 指定生成的微服务项目的微服务类型。可选值为provider,consumer,all                <br />
+例：–service-type provider</li>
+  </ul>
+</blockquote>
+
+<h4 id="32-契约生成文档">3.2 契约生成文档</h4>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar docgenerate <span class="nt">-i</span> swagger.yaml <span class="nt">-o</span> ./document
+</code></pre></div></div>
+<blockquote>
+  <p><strong>docgenerate</strong> 命令选项说明:</p>
+  <ul>
+    <li>-i, –input : 指定遵循OpenAPI规范的契约文件，支持yaml和json格式，支持指定本地和网络文件<br />
+例：-i http://petstore.swagger.io/v2/swagger.json</li>
+    <li>-o, –output : 文档输出路径 <br />
+例：-o ./document</li>
+    <li>-f, –format : 指定输出文档风格,现支持swagger-ui
+例：-f swagger-ui</li>
+  </ul>
+</blockquote>
+
+<h4 id="33-契约风格检查">3.3 契约风格检查</h4>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar checkstyle oas.yaml
+或者
+<span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar cs oas.yaml
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>checkstyle</strong> Command argument</p>
+  <ul>
+    <li>&lt;file&gt; OpenAPI v3 spec yaml文件</li>
+  </ul>
+</blockquote>
+
+<p>见<a href="/cn/docs/toolkit/oas-validator/#合规性校验">风格检查规则</a></p>
+
+<h4 id="34-契约兼容性检查">3.4 契约兼容性检查</h4>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar checkcompatibility left-oas.yaml right-oas.yaml
+或者
+<span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar cc left-oas.yaml right-oas.yaml
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>checkcompatibility</strong> Command argument</p>
+  <ul>
+    <li>&lt;files&gt; Two OpenAPI v3 spec yaml file</li>
+  </ul>
+</blockquote>
+
+<p>见<a href="/cn/docs/toolkit/oas-validator/#兼容性检查">兼容性检查规则</a></p>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="基于 ServiceComb 和 Zipkin 的分布式调用链追踪">
+    <meta itemprop="description" content="本篇将介绍如何使用 ServiceComb 和 Zipkin 实现分布式调用链追踪">
+    <meta itemprop="datePublished" content="July 17, 2017">
+    <meta itemprop="dateModified" content="July 17, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">基于 ServiceComb 和 Zipkin 的分布式调用链追踪
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>微服务架构解决了很多单体应用带来的问题，但同时也需要我们付出额外的代价。由于网络的不稳定性带来的请求处理延迟就是代价之一。</p>
+
+<p>在单体应用中，所有模块都在同一个进程中运行，所以并没有模块间互通的问题。但微服务架构中，服务间通过网络沟通，因此我们不得不处理和网络有关的
+问题，例如：延迟、超时、网络分区等。</p>
+
+<p>另外，随着业务的扩展服务增多，我们很难洞察数据如何在蛛网般复杂的服务结构中流转。我们如何才能有效的监控网络延迟并且可视化服务中的数据流转呢？</p>
+
+<h2 id="zipkin">Zipkin</h2>
+<blockquote>
+  <p><a href="http://zipkin.io/">Zipkin</a> 是一个分布式调用链追踪系统。 它能帮助用户收集时序数据用以定位微服务中的延迟问题，它同时管理追踪数据的收集
+和查询。Zipkin 的设计基于 Google <a href="http://research.google.com/pubs/pub36356.html">Dapper paper</a>。[1]</p>
+</blockquote>
+
+<p>ServiceComb 集成了 Zipkin 提供自动调用链追踪能力，如此一来用户只需要专注实现其业务需求。</p>
+
+<h2 id="使用步骤">使用步骤</h2>
+<p>我们将以 <a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">workshop demo</a> 为例演示如何用 Zipkin 实施调用链追踪。</p>
+
+<h3 id="添加依赖">添加依赖</h3>
+<p>基于 ServiceComb Java Chassis 的微服务只需要添加如下依赖到 pom.xml。</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+
+</code></pre></div></div>
+
+<p>如果微服务是基于 Spring Cloud + Zuul 的 API 网关，例如 workshop demo 中的 manager service ，我们还需要加入如下的额外依赖。</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="配置追踪处理和数据收集">配置追踪处理和数据收集</h3>
+<p>在微服务的 <code class="highlighter-rouge">microservice.yaml</code> 配置文件中，设置追踪处理器和数据收集服务地址。</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-consumer</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">tracing</span><span class="pi">:</span>
+    <span class="na">collector</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://zipkin.servicecomb.io:9411</span>
+</code></pre></div></div>
+
+<p>就这样，在加了两个配置项，没改动一行代码的情况下，我们启动了基于 Zipkin 和 Java chassis 的分布式调用链追踪的功能。</p>
+
+<p><strong>注意</strong> 如果项目中的其他依赖也引入了 zipkin （例如 Spring Cloud），可能导致 zipkin 版本不一致而运行出错，这时需要在项目 pom 中声明 zipkin
+版本。</p>
+
+<h2 id="快速演示">快速演示</h2>
+<p>在 workshop demo 中启动追踪后，我们接下来在 docker 环境中演示一下调用链追踪功能。</p>
+<ol>
+  <li>
+    <p>在 workshop demo 目录下，使用命令 <code class="highlighter-rouge">mvn package -DskipTests -Pdocker</code> 或 <code class="highlighter-rouge">mvn package -DskipTests -Pdocker -Pdocker-machine</code>
+（如果你使用 <a href="https://www.docker.com/products/docker-toolbox">Docker Toolbox</a>），创建所有服务的 docker 镜像</p>
+  </li>
+  <li>
+    <p>运行 <code class="highlighter-rouge">docker-compose up</code></p>
+  </li>
+  <li>
+    <p>按照下面视频中的操作步骤，给运行在 docker 容器中的服务发送请求</p>
+  </li>
+  <li>
+    <p>用浏览器打开运行在 docker 容器中的 Zipkin 网站，地址应为 docker 容器IP：<code class="highlighter-rouge">http://docker.container.ip:9411</code></p>
+  </li>
+</ol>
+
+<!-- Courtesy of embedresponsively.com //-->
+<div class="responsive-video-container">
+
+  <iframe src="https://player.youku.com/embed/XMjg1NzQ3NzUzNg" frameborder="0" allowfullscreen=""></iframe>
+
+</div>
+
+<p>现在我们应该可以看到 Zipkin 首页上显示的几个被追踪的服务。
+<img src="/assets/images/tracing.1.png" alt="zipkin homepage" class="align-center" /></p>
+
+<p>如果我们选择 manager 并点击 Find Traces 按钮，就能看到一些调用链数据。请别介意服务性能可能不太好，因为我们是在一台2012年产的笔记本上
+运行这么多服务。
+<img src="/assets/images/tracing.2.png" alt="traces of manager service" class="align-center" /></p>
+
+<p>如果点击某一个调用链，我们能看到对应的所有时间跨度信息。
+<img src="/assets/images/tracing.3.png" alt="trace spans of manager service" class="align-center" /></p>
+
+<p>点击某个时间跨度，可以获取更详细的调用时间信息。
+<img src="/assets/images/tracing.4.png" alt="span details of manager service" class="align-center" /></p>
+
+<p>同时我们也可以点击 Dependencies 按钮，查看服务的依赖关系图。
+<img src="/assets/images/tracing.5.png" alt="service dependencies" class="align-center" /></p>
+
+<h2 id="总结">总结</h2>
+<p>从以上的示例可以看出，通过 ServiceComb 实现分布式调用链追踪功能只需简单的两步配置，但我们却基于 Zipkin 展示了强大的功能，如分析服务间
+调用的时间数据以定位网络延迟，并提供可视化界面以洞察服务间的调用链和依赖关系。</p>
+
+<h2 id="参考">参考</h2>
+<ul>
+  <li>[1] <a href="http://zipkin.io/">Zipkin</a></li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
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+    <meta itemprop="headline" content="使用OAS Validator帮助你规范OpenAPI Spec文档">
+    <meta itemprop="description" content="本文将介绍如何规范你的OpenAPI Spec文档">
+    <meta itemprop="datePublished" content="October 23, 2019">
+    <meta itemprop="dateModified" content="October 23, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用OAS Validator帮助你规范OpenAPI Spec文档
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="使用oas-validator规范你的openapi-spec文档">使用OAS Validator规范你的OpenAPI Spec文档</h2>
+
+<p>当前主流的开发RESTful API的做法有两种：Code First和Contract First。Code First指先写代码，然后生成Contract，而Contract First则是先写Contract再写代码实现。</p>
+
+<p>两种做法各有利弊，Code First可以让开发人员先写接口实现，然后利用工具反向生成Contract，优点是快速开发，并能保证接口实现与Contract保证一致，缺点是Contract太过易变容易导致下游应用故障。Contract First则可以让Contract的变动受控，保证下游应用的稳定性，缺点是需要人工来保证接口实现与Contact的一致性，具有一定难度。</p>
+
+<p>对于如何规范管理Contract，新开普软件研究院开源的<a href="https://github.com/NewCapec-Institute/oas-validator">OAS Validator[1]</a>提供了一些思路，下面简单介绍。</p>
+
+<h3 id="合规性校验">合规性校验</h3>
+
+<p>OAS Validator支持对使用<a href="https://github.com/OAI/OpenAPI-Specification">OpenAPI V3[2]</a>编写的Contract文档做合规性校验（也可称之为风格校验）。</p>
+
+<p>在一个微服务架构的系统中，提供RESTful API的组件可能会有很多个，并且由不同开发人员/团队开发，那么在使用这些接口的时候有一个很自然的需求就是希望这些接口（或接口文档）的风格是一致的。OAS Validator的合规性校验做的就是这部分工作。下面举例说明怎么使用合规性校验功能：</p>
+
+<ol>
+  <li>到 https://github.com/NewCapec-Institute/oas-validator clone下代码</li>
+  <li>然后 <code class="highlighter-rouge">mvn clean install</code>打包</li>
+  <li>到<code class="highlighter-rouge">oas-validator-web/target</code>目录下执行<code class="highlighter-rouge">java -jar oas-validator-web-exec.jar</code>启动OAS Validator Web</li>
+  <li>访问 http://localhost:8080，进入合规性校验功能</li>
+  <li>把 <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/examples/v3.0/petstore.yaml">petstore.yaml</a> 内容贴到文本框中然后点击校验得到结果：</li>
+</ol>
+
+<pre><code class="language-txt">$.tags : 至少提供一个
+$.openapi : 必须&gt;=3.0.2
+$.components.schemas.'Pet'.title : 必须提供
+$.components.schemas.'Pet'.properties.'id'.title : 必须提供
+$.components.schemas.'Pet'.properties.'name'.title : 必须提供
+$.components.schemas.'Pet'.properties.'tag'.title : 必须提供
+$.components.schemas.'Error'.title : 必须提供
+$.components.schemas.'Error'.properties.'code'.title : 必须提供
+$.components.schemas.'Error'.properties.'message'.title : 必须提供
+$.info.description : 必须提供
+$.paths./pets.get.tags[0] : 不在$.tags所定义的范围内
+$.paths./pets.get.responses.200.headers.'x-next' : 必须为upper hyphen case
+$.paths./pets.post.tags[0] : 不在$.tags所定义的范围内
+$.paths./pets/{petId}.get.tags[0] : 不在$.tags所定义的范围内
+</code></pre>
+
+<p>下面是功能截图：</p>
+
+<p><img src="/assets/images/2019-10-23-use-oas-validator-help-standardize-oas-spec/oas-validator-1.png" alt="图1 合规性校验" class="align-center" /></p>
+
+<p>下面举例解释检查报告的意思：</p>
+
+<p><code class="highlighter-rouge">$.components.schemas.'Pet'.title : 必须提供</code>，前面一段是<a href="https://github.com/json-path/JsonPath">JsonPath[3]</a>，用来描述出问题的元素/属性的位置，“必须提供”则的意思是没有填写该属性。如下图：</p>
+
+<p><img src="/assets/images/2019-10-23-use-oas-validator-help-standardize-oas-spec/oas-validator-2.png" alt="图2 合规性校验示例" class="align-center" /></p>
+
+<p><code class="highlighter-rouge">title</code>是一个文档性字段，没有它虽然不影响接口的语义，但是对于下游应用的开发者来说没有它会造成理解上的困难，因此在这里我们把它设定为必填。</p>
+
+<p>再来看这一条报告 <code class="highlighter-rouge">$.paths./pets.get.responses.200.headers.'x-next' : 必须为upper hyphen case</code>，同样前面是JsonPath，告诉你该属性应该为Upper Hyphen Case，正确的写法应该是<code class="highlighter-rouge">X-Next</code>。和<code class="highlighter-rouge">title</code>属性一样Header的大小写不是一个技术问题，但是统一的大小写风格能够让下游应用的开发人员更舒适，从而有更少的Bug。</p>
+
+<h3 id="兼容性校验">兼容性校验</h3>
+
+<p>不管你是采用Code First还是Contract First，Contract的变动不可避免，那么如何保证变化后的Contract能够对下游应用向下兼容就成了不可回避的问题。这个问题的具体描述就是根据V1.0 Contract开发的下游应用是否依然能够与根据V1.1 Contract实现的接口正确交互。</p>
+
+<p>OAS Validator提供了这种兼容性校验，当然同样只支持OpenAPI V3文档。下面举例说明如何使用这一功能：</p>
+
+<p>我们先提供一个v1.0的OAS Spec：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">openapi</span><span class="pi">:</span> <span class="s2">"</span><span class="s">3.0.0"</span>
+<span class="na">info</span><span class="pi">:</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="m">1.0</span>
+  <span class="na">title</span><span class="pi">:</span> <span class="s">Swagger Petstore</span>
+<span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/pets/{petId}</span><span class="pi">:</span>
+    <span class="na">get</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">showPetById</span>
+      <span class="na">tags</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="s">pets</span>
+      <span class="na">parameters</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">petId</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">path</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="s1">'</span><span class="s">200'</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">Expected response to a valid request</span>
+          <span class="na">content</span><span class="pi">:</span>
+            <span class="s">application/json</span><span class="pi">:</span>
+              <span class="na">schema</span><span class="pi">:</span>
+                <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/components/schemas/Pet"</span>
+<span class="na">components</span><span class="pi">:</span>
+  <span class="na">schemas</span><span class="pi">:</span>
+    <span class="na">Pet</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">object</span>
+      <span class="na">required</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="s">id</span>
+        <span class="pi">-</span> <span class="s">name</span>
+      <span class="na">properties</span><span class="pi">:</span>
+        <span class="na">id</span><span class="pi">:</span>
+          <span class="na">type</span><span class="pi">:</span> <span class="s">integer</span>
+          <span class="na">format</span><span class="pi">:</span> <span class="s">int64</span>
+        <span class="na">name</span><span class="pi">:</span>
+          <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+</code></pre></div></div>
+
+<p>再写一个v1.1的OAS Spec，添加了一个query参数<code class="highlighter-rouge">name</code>：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">openapi</span><span class="pi">:</span> <span class="s2">"</span><span class="s">3.0.0"</span>
+<span class="na">info</span><span class="pi">:</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="m">1.1</span>
+  <span class="na">title</span><span class="pi">:</span> <span class="s">Swagger Petstore</span>
+<span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/pets/{petId}</span><span class="pi">:</span>
+    <span class="na">get</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">showPetById</span>
+      <span class="na">tags</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="s">pets</span>
+      <span class="na">parameters</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">petId</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">path</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">name</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">query</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="s1">'</span><span class="s">200'</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">Expected response to a valid request</span>
+          <span class="na">content</span><span class="pi">:</span>
+            <span class="s">application/json</span><span class="pi">:</span>
+              <span class="na">schema</span><span class="pi">:</span>
+                <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/components/schemas/Pet"</span>
+<span class="na">components</span><span class="pi">:</span>
+  <span class="na">schemas</span><span class="pi">:</span>
+    <span class="na">Pet</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">object</span>
+      <span class="na">required</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="s">id</span>
+        <span class="pi">-</span> <span class="s">name</span>
+      <span class="na">properties</span><span class="pi">:</span>
+        <span class="na">id</span><span class="pi">:</span>
+          <span class="na">type</span><span class="pi">:</span> <span class="s">integer</span>
+          <span class="na">format</span><span class="pi">:</span> <span class="s">int64</span>
+        <span class="na">name</span><span class="pi">:</span>
+          <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+</code></pre></div></div>
+
+<p>然后同样打开OAS Validator Web，进入“兼容性校验”功能，在左侧贴上v1.0在右侧贴上v1.1，点击校验得到结果：</p>
+
+<pre><code class="language-txt">$.paths./pets/{petId}.get.parameters[1].required : [name=name,in=query]:仅允许新增required=false的parameter
+</code></pre>
+
+<p>这个报告的意思是新增的query参数<code class="highlighter-rouge">name</code>是必填的，这种做法不向下兼容。仔细想想是不是的确如此？</p>
+
+<h3 id="总结">总结</h3>
+
+<p>关于OAS Validator的详细文档可见Github。需要注意的是，目前校验规则还不能配置，但是在代码层面提供了接口供扩展，你可以根据自己的需求写一个自己的合规性校验器。</p>
+
+<p>同时OAS Validator正在请求捐赠到<a href="https://github.com/apache/servicecomb-toolkit">Servicecomb Toolkit[4]</a>项目，流程结束后会尽快将其整合到Servicecomb Toolkit中希望能够为广大开发者带来帮助。</p>
+
+<p>最后，欢迎开发者朋友们加入ServiceComb社区，一起做些有意思的事情。<a href="http://servicecomb.incubator.apache.org/cn/docs/join_the_community/">加入社区方法[5]</a></p>
+
+<h3 id="参考资料">参考资料</h3>
+
+<p>[1] OAS Validator https://github.com/NewCapec-Institute/oas-validator</p>
+
+<p>[2] OpenAPI V3 https://github.com/OAI/OpenAPI-Specification</p>
+
+<p>[3] JsonPath https://github.com/json-path/JsonPath</p>
+
+<p>[4] Servicecomb Toolkit https://github.com/apache/servicecomb-toolkit</p>
+
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+      <section class="page__content" itemprop="text">
+        <p>服务提供者的启动过程分为初始化Log4j、bean加载（包括配置加载）和服务注册三部分。</p>
+
+<ul>
+  <li>
+    <p>初始化Log4j</p>
+
+    <p><code class="highlighter-rouge">Log4jUtils</code>默认会从<code class="highlighter-rouge">classpath\*:config/base/log4j.properties</code>和<code class="highlighter-rouge">classpath\*:config/log4j.properties</code>两个路径读取log4j配置并合并，将其传递给Log4j的<code class="highlighter-rouge">PropertyConfigurator</code>方法初始化Log4j。如果优先级最高的配置文件是在磁盘上，且其所在目录有写权限，则将合并的配置输出到该目录，以便于维护时观察生效的参数。</p>
+  </li>
+  <li>
+    <p>bean加载</p>
+
+    <p><code class="highlighter-rouge">BeanUtils</code>默认会从<code class="highlighter-rouge">classpath\*:META-INF/spring/\*.bean.xml</code>路径加载配置文件，并将其传递给Spring框架的<code class="highlighter-rouge">ClassPathXmlApplicationContext</code>完成应用上下文加载。在这个过程中会加载foundation-config模块的bean，完成配置加载。</p>
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+    <p>服务注册</p>
+
+    <p>在Spring context加载完成后，<code class="highlighter-rouge">org.apache.servicecomb.core.CseApplicationListener</code>会加载handler配置、加载provider的schema信息，最后将微服务信息注册到服务中心。</p>
+  </li>
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+
+<blockquote>
+  <p><strong>说明：</strong>
+ServiceComb的配置项分为三个层次：配置中心、环境变量、本地文件，三者优先级依次递减，高优先级中的配置项覆盖低优先级同名配置项。存放在配置中心的配置项可以在运行时修改。</p>
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content/cn/docs/users/communicate-protocol/index.html

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+  <li><a href="#通信协议" id="markdown-toc-通信协议">通信协议</a>    <ul>
+      <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+      <li><a href="#注意事项" id="markdown-toc-注意事项">注意事项</a></li>
+    </ul>
+  </li>
+  <li><a href="#线程模型" id="markdown-toc-线程模型">线程模型</a>    <ul>
+      <li><a href="#概念阐述-1" id="markdown-toc-概念阐述-1">概念阐述</a></li>
+      <li><a href="#完整线程" id="markdown-toc-完整线程">完整线程</a></li>
+    </ul>
+  </li>
+  <li><a href="#rest-over-servlet" id="markdown-toc-rest-over-servlet">REST over Servlet</a>    <ul>
+      <li><a href="#配置说明" id="markdown-toc-配置说明">配置说明</a></li>
+      <li><a href="#示例代码" id="markdown-toc-示例代码">示例代码</a></li>
+    </ul>
+  </li>
+  <li><a href="#rest-over-vertx" id="markdown-toc-rest-over-vertx">REST over Vertx</a>    <ul>
+      <li><a href="#配置说明-1" id="markdown-toc-配置说明-1">配置说明</a></li>
+      <li><a href="#示例代码-1" id="markdown-toc-示例代码-1">示例代码</a></li>
+    </ul>
+  </li>
+  <li><a href="#highway-rpc协议" id="markdown-toc-highway-rpc协议">Highway RPC协议</a>    <ul>
+      <li><a href="#概念阐述-2" id="markdown-toc-概念阐述-2">概念阐述</a></li>
+      <li><a href="#配置说明-2" id="markdown-toc-配置说明-2">配置说明</a></li>
+      <li><a href="#示例代码-2" id="markdown-toc-示例代码-2">示例代码</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="通信协议">通信协议</h2>
+<h3 id="概念阐述">概念阐述</h3>
+
+<p>ServiceComb实现了两种网络通道，包括REST和Highway，均支持TLS加密传输。其中，REST网络通道将服务以标准RESTful形式发布，调用端兼容直接使用http client使用标准RESTful形式进行调用。</p>
+
+<h3 id="注意事项">注意事项</h3>
+
+<p>参数和返回值的序列化：</p>
+
+<p>当前REST通道的body参数只支持application/json序列化方式，如果要向服务端发送form类型的参数，那么需要在调用端构造好application/json格式的body，不能直接以multipart/form-data格式传递form类型参数。</p>
+
+<p>当前REST通道返回值支持application/json和text/plain两种格式，服务提供者通过produces声明可提供序列化能力，服务消费者通过请求的Accept头指明返回值序列化方式，默认返回application/json格式的数据。</p>
+
+<h2 id="线程模型">线程模型</h2>
+<h3 id="概念阐述-1">概念阐述</h3>
+
+<p>本小节主要介绍ServiceComb微服务的完整线程模型，介绍IO线程和业务线程之间的关系</p>
+
+<h3 id="完整线程">完整线程</h3>
+
+<p>ServiceComb微服务的完整线程模型如下图所示：</p>
+
+<p><img src="/assets/images/thread-model.png" alt="" /></p>
+
+<blockquote>
+  <ol>
+    <li>业务线程在第一次调用时会绑定某一个网络线程,避免在不同网络线程之间切换,无谓地增加线程冲突的概率</li>
+    <li>业务线程绑定网络线程后,会再绑定该网络线程内部的某个连接,同样是为了避免线程冲突</li>
+  </ol>
+</blockquote>
+
+<ul>
+  <li>客户端和服务器都可以配置多个网络线程(eventloop)，默认为CPU核数的两倍，每个网络线程可以配置多个连接，默认为1，支持Rest和Highway两种网络通道，具体配置请查看如下章节：
+    <ul>
+      <li><a href="/cn/users/communicate-protocol#rest-over-servlet">REST over Servlet</a></li>
+      <li><a href="/cn/users/communicate-protocol/#rest-over-vertx">REST over Vertx</a></li>
+      <li><a href="/cn/users/communicate-protocol/#highway-rpc协议">Highway RPC协议</a></li>
+    </ul>
+  </li>
+  <li>客户端可配置业务线程池executor，线程粒度可细化至schemaId:operation，配置如下：</li>
+</ul>
+
+<p>在microservice.yaml中添加executors配置，为schemaId:operation配置单独的业务线程池：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span> 
+  <span class="na">executors</span><span class="pi">:</span> 
+    <span class="na">Provider</span><span class="pi">:</span> 
+      <span class="pi">[</span><span class="nv">schemaId</span><span class="pi">]</span><span class="s">.[operation]</span>
+</code></pre></div></div>
+
+<h2 id="rest-over-servlet">REST over Servlet</h2>
+<h3 id="配置说明">配置说明</h3>
+
+<p>　　REST over Servlet对应使用web容器模式部署运行，需要新建一个servlet工程将微服务包装起来，加载到web容器中启动运行，包装微服务的方法有两种，一种完全使用web.xml配置文件配置，另一种仅在web.xml文件中配置listener，在microservice.yaml文件中配置urlPattern，两种方式如下所示：</p>
+
+<ul>
+  <li>
+    <p>在web.xml文件中完成全部配置</p>
+
+    <p>web.xml文件配置在项目的src/main/webapp/WEB_INF目录，配置内容如下：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;web-app</span> <span class="na">xmlns=</span><span class="s">"http://java.sun.com/xml/ns/javaee"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span> <span class="na">xsi:schemaLocation=</span><span class="s">"http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"</span> <span class="na">version=</span><span class="s">"3.0"</span><span class="nt">&gt;</span>  
+   <span class="nt">&lt;context-param&gt;</span> 
+     <span class="nt">&lt;param-name&gt;</span>contextConfigLocation<span class="nt">&lt;/param-name&gt;</span>  
+     <span class="nt">&lt;param-value&gt;</span>classpath*:META-INF/spring/*.bean.xml classpath*:app-config.xml<span class="nt">&lt;/param-value&gt;</span> 
+   <span class="nt">&lt;/context-param&gt;</span>  
+   <span class="nt">&lt;listener&gt;</span> 
+     <span class="nt">&lt;listener-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServletContextListener<span class="nt">&lt;/listener-class&gt;</span> 
+   <span class="nt">&lt;/listener&gt;</span>  
+   <span class="nt">&lt;servlet&gt;</span> 
+     <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>  
+     <span class="nt">&lt;servlet-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServlet<span class="nt">&lt;/servlet-class&gt;</span>  
+     <span class="nt">&lt;load-on-startup&gt;</span>1<span class="nt">&lt;/load-on-startup&gt;</span>  
+     <span class="nt">&lt;async-supported&gt;</span>true<span class="nt">&lt;/async-supported&gt;</span> 
+   <span class="nt">&lt;/servlet&gt;</span>  
+   <span class="nt">&lt;servlet-mapping&gt;</span> 
+     <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>  
+     <span class="nt">&lt;url-pattern&gt;</span>/rest/*<span class="nt">&lt;/url-pattern&gt;</span> 
+   <span class="nt">&lt;/servlet-mapping&gt;</span> 
+ <span class="nt">&lt;/web-app&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>在web.xml文件中仅配置listener，在microservice.yaml文件中配置urlPattern</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;web-app</span> <span class="na">xmlns=</span><span class="s">"http://java.sun.com/xml/ns/javaee"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span> <span class="na">xsi:schemaLocation=</span><span class="s">"http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"</span> <span class="na">version=</span><span class="s">"3.0"</span><span class="nt">&gt;</span>  
+   <span class="nt">&lt;context-param&gt;</span> 
+     <span class="nt">&lt;param-name&gt;</span>contextConfigLocation<span class="nt">&lt;/param-name&gt;</span>  
+     <span class="nt">&lt;param-value&gt;</span>classpath*:META-INF/spring/*.bean.xml classpath*:app-config.xml<span class="nt">&lt;/param-value&gt;</span> 
+   <span class="nt">&lt;/context-param&gt;</span>  
+   <span class="nt">&lt;listener&gt;</span> 
+     <span class="nt">&lt;listener-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServletContextListener<span class="nt">&lt;/listener-class&gt;</span> 
+   <span class="nt">&lt;/listener&gt;</span> 
+ <span class="nt">&lt;/web-app&gt;</span>
+</code></pre></div>    </div>
+
+    <p>在microservice.yaml文件中需要增加一行配置来指定urlPattern：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="s">servicecomb.rest.servlet.urlPattern</span><span class="pi">:</span> <span class="s">/rest/*</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>以上两种方式是等效的，两种方式都需要在maven pom文件中添加如下依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span> 
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>  
+  <span class="nt">&lt;artifactId&gt;</span>transport-rest-servlet<span class="nt">&lt;/artifactId&gt;</span> 
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>REST over Servlet在microservice.yaml文件中的配置项见下表：</p>
+
+<p>表1 REST over Servlet配置项说明</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.address</td>
+      <td style="text-align: left">0.0.0.0:8080</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">服务监听地址</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.timeout</td>
+      <td style="text-align: left">3000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">超时时间</td>
+      <td style="text-align: left">单位为毫秒</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.request.timeout</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">请求超时时间</td>
+      <td style="text-align: left">同REST over Vertx的配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].transport</td>
+      <td style="text-align: left">rest</td>
+      <td style="text-align: left"> </td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">访问的transport类型</td>
+      <td style="text-align: left">同REST over Vertx的配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].version-rule</td>
+      <td style="text-align: left">latest</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">访问实例的版本号</td>
+      <td style="text-align: left">同REST over Vertx的配置</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="示例代码">示例代码</h3>
+
+<p>microservice.yaml文件中的配置示例如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+    <span class="na">timeout</span><span class="pi">:</span> <span class="m">3000</span>
+</code></pre></div></div>
+
+<h2 id="rest-over-vertx">REST over Vertx</h2>
+<h3 id="配置说明-1">配置说明</h3>
+
+<p>REST over Vertx通信通道对应使用standalone部署运行模式，可直接通过main函数拉起。main函数中需要初始化日志和加载服务配置，代码如下：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">MainServer</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+  <span class="err">　</span><span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span><span class="c1">//日志初始化</span>
+  <span class="err">　</span><span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span> <span class="c1">// Spring bean初始化</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>使用REST over Vertx网络通道需要在maven pom文件中添加如下依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+　　<span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+　　<span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>REST over Vertx通道在microservice.yaml文件中有以下配置项：</p>
+
+<p>表2 REST over Vertx配置项说明</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.address</td>
+      <td style="text-align: left">0.0.0.0:8080</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">服务监听地址</td>
+      <td style="text-align: left">仅服务提供者需要配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.server.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">服务端线程数</td>
+      <td style="text-align: left">仅服务提供者需要配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.client.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">客户端网络线程数</td>
+      <td style="text-align: left">仅服务消费者需要配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.client.connection-pool-per-thread</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">客户端每个网络线程中的连接池的个数</td>
+      <td style="text-align: left">仅服务消费者需要配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.request.timeout</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">请求超时时间</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].transport</td>
+      <td style="text-align: left">rest</td>
+      <td style="text-align: left"> </td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">访问的transport类型</td>
+      <td style="text-align: left">仅服务消费者需要配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].version-rule</td>
+      <td style="text-align: left">latest</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">访问实例的版本号</td>
+      <td style="text-align: left">仅服务消费者需要配置支持latest，1.0.0+，1.0.0-2.0.2，精确版本。详细参考服务中心的接口描述。</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="示例代码-1">示例代码</h3>
+
+<p>microservice.yaml文件中的配置示例：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+    <span class="na">thread-count</span><span class="pi">:</span> <span class="m">1</span>
+  <span class="na">references</span><span class="pi">:</span>
+    <span class="na">hello</span><span class="pi">:</span>
+      <span class="na">transport</span><span class="pi">:</span> <span class="s">rest</span>
+      <span class="na">version-rule</span><span class="pi">:</span> <span class="s">0.0.1</span>
+</code></pre></div></div>
+
+<h2 id="highway-rpc协议">Highway RPC协议</h2>
+<h3 id="概念阐述-2">概念阐述</h3>
+
+<p>Highway是ServiceComb的高性能私有协议，用户可在有特殊性能需求的场景下选用。</p>
+
+<h3 id="配置说明-2">配置说明</h3>
+
+<p>使用Highway网络通道需要在maven pom文件中添加如下依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span> 
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>  
+  <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span> 
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>Highway通道在microservice.yaml文件中的配置项如下表所示：</p>
+
+<p>表3 Highway配置项说明</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.address</td>
+      <td style="text-align: left">0.0.0.0:7070</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">服务监听地址</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.server.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">服务端网络线程个数</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.client.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">客户端网络线程个数</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.client.connection-pool-per-thread</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">客户端每个网络线程的连接池个数</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.request.timeout</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">请求超时时间</td>
+      <td style="text-align: left">同REST over Vertx的配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].transport</td>
+      <td style="text-align: left">rest</td>
+      <td style="text-align: left"> </td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">访问的transport类型</td>
+      <td style="text-align: left">同REST over Vertx的配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].version-rule</td>
+      <td style="text-align: left">latest</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">访问实例的版本号</td>
+      <td style="text-align: left">同REST over Vertx的配置</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="示例代码-2">示例代码</h3>
+
+<p>microservice.yaml文件中的配置示例：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070</span>
+</code></pre></div></div>
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+    <meta itemprop="description" content="自定义调用链打点">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">自定义调用链打点
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#前提条件" id="markdown-toc-前提条件">前提条件</a></li>
+  <li><a href="#注意事项" id="markdown-toc-注意事项">注意事项</a></li>
+  <li><a href="#自定义调用链打点" id="markdown-toc-自定义调用链打点">自定义调用链打点</a></li>
+  <li><a href="#使用步骤" id="markdown-toc-使用步骤">使用步骤:</a>    <ul>
+      <li><a href="#添加依赖" id="markdown-toc-添加依赖">添加依赖</a></li>
+      <li><a href="#启用自定义打点功能" id="markdown-toc-启用自定义打点功能">启用自定义打点功能</a></li>
+      <li><a href="#定制打点" id="markdown-toc-定制打点">定制打点</a></li>
+    </ul>
+  </li>
+  <li><a href="#定制上报的数据" id="markdown-toc-定制上报的数据">定制上报的数据</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>分布式调用链追踪提供了服务间调用的时序信息，但服务内部的链路调用信息对开发者同样重要，如果能将两者合二为一，就能提供更完整的调用链，更容易定位错误和潜在性能问题。</p>
+
+<h2 id="前提条件">前提条件</h2>
+
+<ul>
+  <li>使用自定义打点功能需要首先配置并启用Java Chassis微服务调用链。</li>
+</ul>
+
+<h2 id="注意事项">注意事项</h2>
+
+<ul>
+  <li>使用<code class="highlighter-rouge">@Span</code>注释的自定义打点功能只支持和Java Chassis调用请求同一线程的方法调用。</li>
+  <li>添加<code class="highlighter-rouge">@Span</code>注释的方法必须是Spring管理的Bean，否则需要按这里<a href="https://stackoverflow.com/questions/41383941/load-time-weaving-for-non-spring-beans-in-a-spring-application">提到的方法</a>配置。</li>
+</ul>
+
+<h2 id="自定义调用链打点">自定义调用链打点</h2>
+
+<p>该功能集成了Zipkin，提供<code class="highlighter-rouge">@Span</code>注释为需要追踪的方法自定义打点。Java Chassis将自动追踪所有添加<code class="highlighter-rouge">@Span</code>注释的方法，把每个方法的本地调用信息与服务间调用信息连接起来。</p>
+
+<h2 id="使用步骤">使用步骤:</h2>
+
+<h3 id="添加依赖">添加依赖</h3>
+
+<p>基于 ServiceComb Java Chassis 的微服务只需要添加如下依赖到 pom.xml：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="启用自定义打点功能">启用自定义打点功能</h3>
+
+<p>在应用入口或Spring配置类上添加<code class="highlighter-rouge">@EnableZipkinTracing</code>注释：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableZipkinTracing</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">ZipkinSpanTestApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ZipkinSpanTestApplication</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="定制打点">定制打点</h3>
+
+<p>在需要定制打点的方法上添加<code class="highlighter-rouge">@Span</code>注释：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SlowRepoImpl</span> <span class="kd">implements</span> <span class="nc">SlowRepo</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">SlowRepoImpl</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Random</span> <span class="n">random</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Random</span><span class="o">();</span>
+
+  <span class="nd">@Span</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">crawl</span><span class="o">()</span> <span class="kd">throws</span> <span class="nc">InterruptedException</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"in /crawl"</span><span class="o">);</span>
+    <span class="nc">Thread</span><span class="o">.</span><span class="na">sleep</span><span class="o">(</span><span class="n">random</span><span class="o">.</span><span class="na">nextInt</span><span class="o">(</span><span class="mi">200</span><span class="o">));</span>
+    <span class="k">return</span> <span class="s">"crawled"</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>就这样，通过使用<code class="highlighter-rouge">@Span</code>注释，我们启动了基于 Zipkin 的自定义打点功能。</p>
+
+<h2 id="定制上报的数据">定制上报的数据</h2>
+
+<p>通过自定义打点上报的调用链包含两条数据：</p>
+
+<ul>
+  <li><strong>span name</strong> 默认为当前注释的方法全名。</li>
+  <li><strong>call.path</strong> 默认为当前注释的方法签名。</li>
+</ul>
+
+<p>例如，上述例子<code class="highlighter-rouge">SlowRepoImp</code>里上报的数据如下：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">key</th>
+      <th style="text-align: left">value</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">span name</td>
+      <td style="text-align: left">crawl</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">call.path</td>
+      <td style="text-align: left">public abstract java.lang.String org.apache.servicecomb.tests.tracing.SlowRepo.crawl() throws java.lang.InterruptedException</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>如果需要定制上报的数据内容，可以传入自定义的参数：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="kd">public</span> <span class="kd">static</span> <span class="kd">class</span> <span class="nc">CustomSpanTask</span> <span class="o">{</span>
+    <span class="nd">@Span</span><span class="o">(</span><span class="n">spanName</span> <span class="o">=</span> <span class="s">"transaction1"</span><span class="o">,</span> <span class="n">callPath</span> <span class="o">=</span> <span class="s">"startA"</span><span class="o">)</span>
+    <span class="kd">public</span> <span class="nc">String</span> <span class="nf">invoke</span><span class="o">()</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="s">"invoke the method"</span><span class="o">;</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+</code></pre></div></div>
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+      <li><a href="#使用docker-compose编排并拉起所有的微服务" id="markdown-toc-使用docker-compose编排并拉起所有的微服务">使用Docker Compose编排并拉起所有的微服务</a></li>
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+      <li><a href="#在kubernetes集群中部署java-chassis-company演示项目" id="markdown-toc-在kubernetes集群中部署java-chassis-company演示项目">在Kubernetes集群中部署Java Chassis Company演示项目</a></li>
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+</ul>
+
+  </nav>
+</aside>
+
+<p>Java Chassis作为一个微服务框架，支持多样化的部署模式。</p>
+
+<h2 id="物理机或虚拟机部署">物理机或虚拟机部署</h2>
+<p>这种方式直接部署在物理机或虚拟机操作系统上，Chassis微服务以Java进程的方式启动：</p>
+
+<p><img src="/assets/images/SimpleDeployment.png" alt="SimpleDeployment" /></p>
+
+<p>请保证网络在同一个局域网内，或能互通。</p>
+
+<h3 id="如何打包微服务">如何打包微服务</h3>
+<p>在微服务项目的<code class="highlighter-rouge">pom.xml</code>中添加以下依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;build&gt;</span>
+    <span class="nt">&lt;plugins&gt;</span>
+      <span class="nt">&lt;plugin&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.apache.maven.plugins<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>maven-jar-plugin<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;version&gt;</span>2.6<span class="nt">&lt;/version&gt;</span>
+        <span class="nt">&lt;configuration&gt;</span>
+          <span class="nt">&lt;archive&gt;</span>
+            <span class="nt">&lt;manifest&gt;</span>
+              <span class="nt">&lt;addClasspath&gt;</span>true<span class="nt">&lt;/addClasspath&gt;</span>
+              <span class="nt">&lt;classpathPrefix&gt;</span>lib/<span class="nt">&lt;/classpathPrefix&gt;</span>
+              <span class="c">&lt;!--change to your main class--&gt;</span>
+              <span class="nt">&lt;mainClass&gt;</span>${your-package}.Application<span class="nt">&lt;/mainClass&gt;</span>
+            <span class="nt">&lt;/manifest&gt;</span>
+            <span class="nt">&lt;manifestEntries&gt;</span>
+              <span class="nt">&lt;Class-Path&gt;</span>. <span class="nt">&lt;/Class-Path&gt;</span>
+            <span class="nt">&lt;/manifestEntries&gt;</span>
+          <span class="nt">&lt;/archive&gt;</span>
+        <span class="nt">&lt;/configuration&gt;</span>
+      <span class="nt">&lt;/plugin&gt;</span>
+      <span class="nt">&lt;plugin&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.apache.maven.plugins<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>maven-dependency-plugin<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;executions&gt;</span>
+          <span class="nt">&lt;execution&gt;</span>
+            <span class="nt">&lt;id&gt;</span>copy-dependencies<span class="nt">&lt;/id&gt;</span>
+            <span class="nt">&lt;phase&gt;</span>package<span class="nt">&lt;/phase&gt;</span>
+            <span class="nt">&lt;goals&gt;</span>
+              <span class="nt">&lt;goal&gt;</span>copy-dependencies<span class="nt">&lt;/goal&gt;</span>
+            <span class="nt">&lt;/goals&gt;</span>
+            <span class="nt">&lt;configuration&gt;</span>
+              <span class="nt">&lt;outputDirectory&gt;</span>target/lib<span class="nt">&lt;/outputDirectory&gt;</span>
+            <span class="nt">&lt;/configuration&gt;</span>
+          <span class="nt">&lt;/execution&gt;</span>
+        <span class="nt">&lt;/executions&gt;</span>
+      <span class="nt">&lt;/plugin&gt;</span>
+    <span class="nt">&lt;/plugins&gt;</span>
+  <span class="nt">&lt;/build&gt;</span>
+</code></pre></div></div>
+
+<p>之后运行：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn package
+</code></pre></div></div>
+
+<p>在<code class="highlighter-rouge">target</code>目录下拷贝生成的微服务jar包和<code class="highlighter-rouge">lib</code>（依赖jar）至任何目录，运行即可：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> <span class="k">${</span><span class="nv">project</span><span class="p">.artifactId</span><span class="k">}</span>-<span class="k">${</span><span class="nv">project</span><span class="p">.version</span><span class="k">}</span>.jar
+</code></pre></div></div>
+
+<blockquote>
+  <p>提示：</p>
+  <ol>
+    <li>如果需要更改<code class="highlighter-rouge">microservice.yaml</code>中的配置项又不希望重新打包，可以直接编写一个新的<code class="highlighter-rouge">microservice.yaml</code>，然后放置于微服务jar包同级别目录，重启微服务即可；</li>
+    <li>请修改上面打包依赖配置中<code class="highlighter-rouge">&lt;mainClass&gt;${your-package}.Application&lt;/mainClass&gt;</code>为微服务启动MainClass。</li>
+  </ol>
+</blockquote>
+
+<h2 id="docker容器化部署">Docker容器化部署</h2>
+<p>这种方式适合部署测试环境，当微服务数据量比较多的情况下能够大幅减少部署的工作量，一键拉起所有的微服务：</p>
+
+<p><img src="/assets/images/DockerDeployment.png" alt="DockerDeployment" /></p>
+
+<h3 id="如何直接打包微服务为docker镜像">如何直接打包微服务为Docker镜像</h3>
+<p>我们使用io.fabric8的<a href="https://github.com/fabric8io/docker-maven-plugin">maven插件</a>从打包，镜像在微服务项目的<code class="highlighter-rouge">pom.xml</code>中添加以下依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;build&gt;</span>
+    <span class="nt">&lt;pluginManagement&gt;</span>
+      <span class="nt">&lt;plugins&gt;</span>
+        <span class="nt">&lt;plugin&gt;</span>
+          <span class="nt">&lt;groupId&gt;</span>io.fabric8<span class="nt">&lt;/groupId&gt;</span>
+          <span class="nt">&lt;artifactId&gt;</span>docker-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+          <span class="nt">&lt;configuration&gt;</span>
+            <span class="nt">&lt;images&gt;</span>
+              <span class="nt">&lt;image&gt;</span>
+                <span class="nt">&lt;name&gt;</span>${project.artifactId}:${project.version}<span class="nt">&lt;/name&gt;</span>
+                <span class="nt">&lt;alias&gt;</span>${project.artifactId}<span class="nt">&lt;/alias&gt;</span>
+                <span class="nt">&lt;build&gt;</span>
+                  <span class="nt">&lt;from&gt;</span>openjdk:8-jdk-stretch<span class="nt">&lt;/from&gt;</span>
+                  <span class="nt">&lt;ports&gt;</span>
+                    <span class="nt">&lt;port&gt;</span>8080<span class="nt">&lt;/port&gt;</span>
+                  <span class="nt">&lt;/ports&gt;</span>
+                  <span class="nt">&lt;volumes&gt;</span>
+                    <span class="nt">&lt;volume&gt;</span>/docker<span class="nt">&lt;/volume&gt;</span>
+                  <span class="nt">&lt;/volumes&gt;</span>
+                  <span class="nt">&lt;assembly&gt;</span>
+                    <span class="nt">&lt;mode&gt;</span>dir<span class="nt">&lt;/mode&gt;</span>
+                    <span class="nt">&lt;basedir&gt;</span>/<span class="nt">&lt;/basedir&gt;</span>
+                    <span class="nt">&lt;descriptor&gt;</span>assembly.xml<span class="nt">&lt;/descriptor&gt;</span>
+                  <span class="nt">&lt;/assembly&gt;</span>
+                  <span class="nt">&lt;entryPoint&gt;</span>
+                    <span class="nt">&lt;shell&gt;</span>java $JAVA_OPTS -jar /docker/${project.artifactId}-${project.version}.jar<span class="nt">&lt;/shell&gt;</span>
+                  <span class="nt">&lt;/entryPoint&gt;</span>
+                <span class="nt">&lt;/build&gt;</span>
+              <span class="nt">&lt;/image&gt;</span>
+            <span class="nt">&lt;/images&gt;</span>
+          <span class="nt">&lt;/configuration&gt;</span>
+          <span class="nt">&lt;executions&gt;</span>
+            <span class="nt">&lt;execution&gt;</span>
+              <span class="nt">&lt;id&gt;</span>build<span class="nt">&lt;/id&gt;</span>
+              <span class="nt">&lt;phase&gt;</span>package<span class="nt">&lt;/phase&gt;</span>
+              <span class="nt">&lt;goals&gt;</span>
+                <span class="nt">&lt;goal&gt;</span>build<span class="nt">&lt;/goal&gt;</span>
+              <span class="nt">&lt;/goals&gt;</span>
+            <span class="nt">&lt;/execution&gt;</span>
+          <span class="nt">&lt;/executions&gt;</span>
+        <span class="nt">&lt;/plugin&gt;</span>
+      <span class="nt">&lt;/plugins&gt;</span>
+    <span class="nt">&lt;/pluginManagement&gt;</span>
+  <span class="nt">&lt;/build&gt;</span>
+
+  <span class="nt">&lt;profiles&gt;</span>
+    <span class="nt">&lt;profile&gt;</span>
+      <span class="nt">&lt;id&gt;</span>docker<span class="nt">&lt;/id&gt;</span>
+      <span class="nt">&lt;build&gt;</span>
+        <span class="nt">&lt;plugins&gt;</span>
+          <span class="nt">&lt;plugin&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.apache.maven.plugins<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>maven-jar-plugin<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;version&gt;</span>2.6<span class="nt">&lt;/version&gt;</span>
+            <span class="nt">&lt;configuration&gt;</span>
+              <span class="nt">&lt;archive&gt;</span>
+                <span class="nt">&lt;manifest&gt;</span>
+                  <span class="nt">&lt;addClasspath&gt;</span>true<span class="nt">&lt;/addClasspath&gt;</span>
+                  <span class="nt">&lt;classpathPrefix&gt;</span>lib/<span class="nt">&lt;/classpathPrefix&gt;</span>
+                  <span class="c">&lt;!--change to your main class--&gt;</span>
+                  <span class="nt">&lt;mainClass&gt;</span>${your-package}.Application<span class="nt">&lt;/mainClass&gt;</span>
+                <span class="nt">&lt;/manifest&gt;</span>
+                <span class="nt">&lt;manifestEntries&gt;</span>
+                  <span class="nt">&lt;Class-Path&gt;</span>.<span class="nt">&lt;/Class-Path&gt;</span>
+                <span class="nt">&lt;/manifestEntries&gt;</span>
+              <span class="nt">&lt;/archive&gt;</span>
+            <span class="nt">&lt;/configuration&gt;</span>
+          <span class="nt">&lt;/plugin&gt;</span>
+          <span class="nt">&lt;plugin&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>org.apache.maven.plugins<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>maven-dependency-plugin<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="nt">&lt;executions&gt;</span>
+              <span class="nt">&lt;execution&gt;</span>
+                <span class="nt">&lt;id&gt;</span>copy-dependencies<span class="nt">&lt;/id&gt;</span>
+                <span class="nt">&lt;phase&gt;</span>package<span class="nt">&lt;/phase&gt;</span>
+                <span class="nt">&lt;goals&gt;</span>
+                  <span class="nt">&lt;goal&gt;</span>copy-dependencies<span class="nt">&lt;/goal&gt;</span>
+                <span class="nt">&lt;/goals&gt;</span>
+                <span class="nt">&lt;configuration&gt;</span>
+                  <span class="nt">&lt;outputDirectory&gt;</span>target/lib<span class="nt">&lt;/outputDirectory&gt;</span>
+                <span class="nt">&lt;/configuration&gt;</span>
+              <span class="nt">&lt;/execution&gt;</span>
+            <span class="nt">&lt;/executions&gt;</span>
+          <span class="nt">&lt;/plugin&gt;</span>
+          <span class="nt">&lt;plugin&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>io.fabric8<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>docker-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+          <span class="nt">&lt;/plugin&gt;</span>
+        <span class="nt">&lt;/plugins&gt;</span>
+      <span class="nt">&lt;/build&gt;</span>
+    <span class="nt">&lt;/profile&gt;</span>
+  <span class="nt">&lt;/profiles&gt;</span>
+</code></pre></div></div>
+
+<p>在项目源代码<code class="highlighter-rouge">src\main</code>下，创建一个<code class="highlighter-rouge">docker</code>目录，之后在此目录中创建一个<code class="highlighter-rouge">assembly.xml</code>文件，填入下面的内容：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;assembly&gt;</span>
+  <span class="nt">&lt;id&gt;</span>installer<span class="nt">&lt;/id&gt;</span>
+  <span class="nt">&lt;fileSets&gt;</span>
+    <span class="nt">&lt;fileSet&gt;</span>
+      <span class="nt">&lt;directory&gt;</span>${project.build.directory}/lib<span class="nt">&lt;/directory&gt;</span>
+      <span class="nt">&lt;outputDirectory&gt;</span>/docker/lib<span class="nt">&lt;/outputDirectory&gt;</span>
+      <span class="nt">&lt;fileMode&gt;</span>0644<span class="nt">&lt;/fileMode&gt;</span>
+      <span class="nt">&lt;directoryMode&gt;</span>0755<span class="nt">&lt;/directoryMode&gt;</span>
+    <span class="nt">&lt;/fileSet&gt;</span>
+  <span class="nt">&lt;/fileSets&gt;</span>
+  <span class="nt">&lt;files&gt;</span>
+    <span class="nt">&lt;file&gt;</span>
+      <span class="nt">&lt;source&gt;</span>${project.build.directory}/${project.artifactId}-${project.version}.jar<span class="nt">&lt;/source&gt;</span>
+      <span class="nt">&lt;outputDirectory&gt;</span>/docker<span class="nt">&lt;/outputDirectory&gt;</span>
+      <span class="nt">&lt;destName&gt;</span>${project.artifactId}-${project.version}.jar<span class="nt">&lt;/destName&gt;</span>
+    <span class="nt">&lt;/file&gt;</span>
+  <span class="nt">&lt;/files&gt;</span>
+<span class="nt">&lt;/assembly&gt;</span>
+</code></pre></div></div>
+
+<p>完成之后的项目效果：</p>
+
+<p><img src="/assets/images/DockerPackageAssembly.png" alt="DockerPackageAssembly" /></p>
+
+<p>运行：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn package <span class="nt">-Pdocker</span>
+</code></pre></div></div>
+
+<p>等待打包完成，会有提示镜像生成成功并注册到本地镜像库的提示。</p>
+
+<blockquote>
+  <p>提示：</p>
+  <ol>
+    <li>请修改上面打包依赖配置中<code class="highlighter-rouge">&lt;mainClass&gt;${your-package}.Application&lt;/mainClass&gt;</code>为微服务启动MainClass；</li>
+    <li>为了保留普通打包方式，docker打包方式配置为maven profile，即``-Pdocker`；</li>
+    <li>如果是使用windows系统，请安装docker machine，并且确保docker machine vm启动中；</li>
+    <li>打包的镜像会默认安装在本地镜像库中，如果需要上传外部镜像库例如中央库，可以使用下面的命令：
+      <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn <span class="nt">-Ddocker</span>.registry<span class="o">=</span>registry.hub.docker.com/<span class="k">${</span><span class="nv">username</span><span class="k">}</span> <span class="nt">-Ddocker</span>.username<span class="o">=</span><span class="k">${</span><span class="nv">username</span><span class="k">}</span> <span class="nt">-Ddocker</span>.password<span class="o">=</span><span class="k">${</span><span class="nv">password</span><span class="k">}</span> docker:push
+</code></pre></div>      </div>
+    </li>
+  </ol>
+</blockquote>
+
+<h3 id="使用docker-compose编排并拉起所有的微服务">使用Docker Compose编排并拉起所有的微服务</h3>
+<p>将所有的微服务打包为镜像后，就可以使用Docker Compose组织它们，我们给一个例子：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">version</span><span class="pi">:</span> <span class="s1">'</span><span class="s">2.0'</span>
+
+<span class="na">services</span><span class="pi">:</span>
+  <span class="na">service-center</span><span class="pi">:</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">servicecomb/service-center"</span>
+    <span class="na">hostname</span><span class="pi">:</span> <span class="s">service-center</span>
+    <span class="na">ports</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">30100:30100"</span>
+
+  <span class="na">mysql-write-db</span><span class="pi">:</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">mysql:latest"</span>
+    <span class="na">hostname</span><span class="pi">:</span> <span class="s">write_db_server</span>
+    <span class="na">environment</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s">MYSQL_ROOT_PASSWORD=password</span>
+      <span class="pi">-</span> <span class="s">MYSQL_DATABASE=seckill</span>
+      <span class="pi">-</span> <span class="s">MYSQL_USER=seckill</span>
+      <span class="pi">-</span> <span class="s">MYSQL_PASSWORD=password</span>
+    <span class="na">ports</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">3306"</span>
+
+  <span class="na">activemq</span><span class="pi">:</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">webcenter/activemq:latest"</span>
+    <span class="na">hostname</span><span class="pi">:</span> <span class="s">queue-server</span>
+    <span class="na">ports</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">61616"</span>
+
+  <span class="na">admin-service</span><span class="pi">:</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">seckill-admin-service:0.2.0-SNAPSHOT"</span>
+    <span class="na">hostname</span><span class="pi">:</span> <span class="s">admin-service</span>
+    <span class="na">links</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">mysql-write-db:write_db.servicecomb.io"</span>
+    <span class="na">environment</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s">JAVA_OPTS=-Dspring.profiles.active=prd,cse -Dendpoints.shutdown.enabled=true</span>
+    <span class="na">ports</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="s2">"</span><span class="s">8081:8081"</span>
+</code></pre></div></div>
+
+<p>为了能够使containers互联互通，使用<code class="highlighter-rouge">links</code>指定链接关系，<code class="highlighter-rouge">ports</code>用于映射到Docker Host的端口，关于Docker Compose Yaml配置的更多信息，可以参见<a href="https://docs.docker.com/compose/">这篇文档</a>。</p>
+
+<p>编写好docker-compose.yml后，切换到此文件目录，执行：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker-compose up
+</code></pre></div></div>
+
+<p>即可将所有的微服务都拉起来。</p>
+
+<blockquote>
+  <p>提示：</p>
+  <ol>
+    <li>docker-compose默认寻找当前文件夹下的docker-compose.yml文件作为编排配置文件，如果需要指定文件名或路径，请使用<code class="highlighter-rouge">docker-compose -f ${fullFileName}</code>；</li>
+    <li>如果container无需对外发布端口则可以不设置<code class="highlighter-rouge">ports</code>。</li>
+  </ol>
+</blockquote>
+
+<h2 id="kubernetes集群部署">Kubernetes集群部署</h2>
+<p>Kubernetes是谷歌开源的容器集群管理系统，目前已经具备生产化成熟度，虽然Java Chassis作为一个微服务框架与Kubernetes处于不同层次，但由于Kubernetes同样拥有注册-发现、弹性伸缩、监控等方面的功能，因此很容易与Java Chassis中相关功能搞混，我们需要比较深入的理解两者的差异。</p>
+
+<h3 id="kubernetes">Kubernetes</h3>
+
+<p><img src="/assets/images/K8S.png" alt="K8S" /></p>
+
+<p>上图中，我们省去了网络细节，关注这几个点：</p>
+<ol>
+  <li>Service的注册和发现：应用（app）实例（container）的启动或停止由Kubernetes管理，Kubernetes会依据Node的负载状况动态调配Host它们的Pod，那么这就带来一个问题：一个App想调用另外一个App，是如何知道目标App实例的IP和端口呢？因此Kubernetes引入了一个逻辑层次——Service，Service有唯一的名字，Kubernetes会将Service的所有App实例在Pod上的IP和端口保存在Name Service中，如果App之间的调用通过Service名，就可以通过Service名映射app实例的IP和端口，这个过程类似DNS。Kubernetes启动App实例并向Name Service登记的这个过程就是Service的注册，而一个App调用另外一个App从Name Service查询目标IP和端口的过程就是Service的发现；</li>
+  <li>弹性伸缩：弹性伸缩是Kubernetes的一个重要能力，通过配置弹性伸缩策略，支持使用CPU、内存使用率、连接数，或其他第三方的Metrics作为输入，如何设置请参考<a href="https://k8smeetup.github.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/">这篇文档</a>；</li>
+  <li>负载均衡：有了Service注册和发现机制，Kubernetes以Service Name为中心构建负载均衡，Service有三种类型<code class="highlighter-rouge">NodePort</code>，<code class="highlighter-rouge">ClusterIP</code>和<code class="highlighter-rouge">LoadBalancer</code>，后两种具有负载均衡能力，<code class="highlighter-rouge">LoadBalancer</code>需要PaaS平台实现，因此对于本地Kubernetes集群多用<code class="highlighter-rouge">ClusterIP</code>；</li>
+  <li>监控：Kubernetes自带Heapster监控资源的使用。</li>
+</ol>
+
+<h3 id="java-chassis">Java Chassis</h3>
+
+<p><img src="/assets/images/ServiceCombBasic.png" alt="ServiceCombBasic" /></p>
+
+<p>上图是Java Chassis基本原理，我们同样解释几个点：</p>
+<ol>
+  <li>Java Chassis的注册和发现：ServiceCenter是一个完整独立的注册中心，不同于Kubernetes的Name Service，它存储了微服务启动后上传的Swagger契约，契约中描述了调用路径、入参和出参，即对接口进行了全面的描述。其它微服务发起调用的时候，可以通过获取Producer的契约动态生成Consumer代码，也可以做调用预检查等；</li>
+  <li>弹性伸缩：Java Chassis作为一个SDK本身是无法启动微服务实例和调配资源的，因此没有此能力。</li>
+  <li>负载均衡：Java Chassis是Consumer端软负载均衡；当一个Java Chassis微服务启动后，会将获取的本地IP和设置的发布端口发布至ServiceCenter，ServiceCenter会立刻通知所有的其他微服务实例信息发生了变化，更新本地缓存，调整负载分配；</li>
+  <li>监控：Java Chassis并不带监控系统，它只可以输出Tracing、Metrics和Log数据，对接Zipkin、Prometheus等监控系统，当然Metrics也可以作为Kubernetes弹性伸缩策略的输入。</li>
+</ol>
+
+<p>综合上述，我们总结为下面的表格：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">说明项</th>
+      <th style="text-align: left">Kubernetes</th>
+      <th style="text-align: left">Java Chassis</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">定位</td>
+      <td style="text-align: left">容器集群管理系统</td>
+      <td style="text-align: left">微服务框架</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">层次</td>
+      <td style="text-align: left">PaaS</td>
+      <td style="text-align: left">SDK</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Service的含义</td>
+      <td style="text-align: left">逻辑概念，用selector指向containers</td>
+      <td style="text-align: left">业务概念，微服务拆分后的业务</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">注册和发现</td>
+      <td style="text-align: left">NameService为中心</td>
+      <td style="text-align: left">ServiceCenter为中心</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">弹性伸缩</td>
+      <td style="text-align: left">调度资源启动或停止实例</td>
+      <td style="text-align: left">无此能力</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">负载均衡</td>
+      <td style="text-align: left">name + selector机制</td>
+      <td style="text-align: left">Consumer端动态发现实例的变化</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">监控</td>
+      <td style="text-align: left">有集成的监控系统</td>
+      <td style="text-align: left">只作为监控系统的数据源</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="kubernetes--java-chassis">Kubernetes + Java Chassis</h3>
+<p>理解了上面的内容之后，我们可以如下设计 Java Chassis在Kubernetes集群中的部署：</p>
+
+<p><img src="/assets/images/ServiceCombInK8S.png" alt="ServiceCombInK8S" /></p>
+
+<ul>
+  <li>将微服务的镜像上传至Kubernetes能够访问到的镜像仓库；</li>
+  <li>为每一个 Java Chassis微服务配置为一个Kubernetes Deployment并配置弹性伸缩策略；</li>
+  <li>ServerCenter如果作为一个Kubernetes Deployment部署，那么保证IP固定使得VPC内均可访问，也可以将ServiceCenter部署在外部，然后使用Kubernetes外部域名解析机制能够访问到它；</li>
+  <li>使用Fannel网络让Pod的IP能够互联互通， Java Chassis启动后会使用Pod的IP发布，保证能相互调用；否则配置使用<code class="highlighter-rouge">servicecomb.service.publishAddress</code>指定发布地址；</li>
+  <li>对于需要外部访问的 Java Chassis微服务，配置Kubernetes Service。</li>
+</ul>
+
+<blockquote>
+  <p>提示：</p>
+  <ol>
+    <li>请牢记 Java Chassis的负载均衡机制与Kubernetes的负载均衡机制无关，即Java Chassis的负载均衡并不走name + selector机制，也不需要配置Service；</li>
+    <li>上述部署细节可依据实际环境（例如网络）自行调整。</li>
+  </ol>
+</blockquote>
+
+<h3 id="在kubernetes集群中部署java-chassis-company演示项目">在Kubernetes集群中部署Java Chassis Company演示项目</h3>
+<p>Company是我们提供的一个有趣味性的演示项目：</p>
+<ol>
+  <li>源代码地址：https://github.com/huaweicse/ServiceComb-Company-WorkShop</li>
+  <li>项目的详细讲解：http://servicecomb.apache.org/cn/docs/linuxcon-workshop-demo/</li>
+</ol>
+
+<p>如何在Kubernetes集群中部署Company：http://servicecomb.apache.org/cn/docs/company-on-kubernetes/</p>
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+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">用JAX-RS开发微服务
+</h1>
+            
+          </header>
+        
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#开发示例" id="markdown-toc-开发示例">开发示例</a></li>
+  <li><a href="#涉及api" id="markdown-toc-涉及api">涉及API</a></li>
+</ul>
+
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+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>ServiceComb支持开发者使用JAX-RS注解，使用JAX-RS模式开发服务。</p>
+
+<h2 id="开发示例">开发示例</h2>
+<ul>
+  <li>
+    <p><strong>步骤 1</strong> 添加依赖。</p>
+
+    <p>在Maven的pom.xml中添加所需的依赖：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="c">&lt;!--transport根据microservice.yaml中endpoint发布需求选择，本例中两者都引入，也可以二选一--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>provider-jaxrs<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>slf4j-log4j12<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 实现服务。</p>
+
+    <p>使用JAX-RS注解开发业务代码，Hello的服务实现如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">javax.ws.rs.POST</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">javax.ws.rs.Path</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">javax.ws.rs.Produces</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+ <span class="nd">@Path</span><span class="o">(</span><span class="s">"/jaxrshello"</span><span class="o">)</span>
+ <span class="nd">@Produces</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">JaxrsHelloImpl</span> <span class="o">{</span>
+   <span class="nd">@Path</span><span class="o">(</span><span class="s">"/sayhi"</span><span class="o">)</span>
+   <span class="nd">@POST</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+   <span class="err">　</span><span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@Path</span><span class="o">(</span><span class="s">"/sayhello"</span><span class="o">)</span>
+   <span class="nd">@POST</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><strong>注意：请一定在服务的实现类（本文档例子为JaxrsHelloImpl）上标记@Path，否则接口发布的Path和Method将会不正确！</strong></p>
+
+    <p>本例sayHi的访问Path为<code class="highlighter-rouge">/jaxrshello/sayhi</code>，sayHello的访问Path为<code class="highlighter-rouge">/jaxrshello/sayhello</code>，如果希望他们的访问路径为<code class="highlighter-rouge">/sayhi</code>和<code class="highlighter-rouge">/sayhello</code>，直接设置JaxrsHelloImpl上的<code class="highlighter-rouge">@Path</code>为<code class="highlighter-rouge">@Path("/")</code>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 发布服务。</p>
+
+    <p>在服务的实现类上打上注解<code class="highlighter-rouge">@RestSchema</code>，指定schemaId，表示该实现作为当前微服务的一个schema发布，代码如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+ <span class="c1">// other code omitted</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"jaxrsHello"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">JaxrsHelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="c1">// other code omitted</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>然后在resources/META-INF/spring目录下创建jaxrsHello.bean.xml文件，配置spring进行服务扫描的base-package，文件内容如下：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance "</span>
+        <span class="na">xmlns:p=</span><span class="s">"http://www.springframework.org/schema/p"</span> <span class="na">xmlns:util=</span><span class="s">"http://www.springframework.org/schema/util"</span>
+        <span class="na">xmlns:cse=</span><span class="s">"http://www.huawei.com/schema/paas/cse/rpc"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.huawei.com/schema/paas/cse/rpc classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span class="nt">&gt;</span>
+   
+     <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.jaxrs.provider"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 4</strong> 添加服务定义。</p>
+
+    <p>在resources目录中添加<a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 5</strong> 添加Main启动类</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+      <span class="c1">//初始化日志， 加载Bean(包括它们的参数), 以及注册Service, 更多信息可以参见文档 : https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/bootup.html</span>
+      <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+      <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="涉及api">涉及API</h2>
+
+<p>JAX-RS开发模式当前支持如下注解，所有注解的使用方法参考<a href="https://jax-rs-spec.java.net/nonav/2.0-rev-a/apidocs/index.html">JAX-RS官方文档</a>。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">注解</th>
+      <th style="text-align: left">位置</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.Path</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">URL路径</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.Produces</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">方法支持的编解码能力</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.DELETE</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.GET</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.POST</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.PUT</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.QueryParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从query string中获取参数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.PathParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从path中获取参数，必须在path中定义该参数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.HeaderParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从header中获取参数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.CookieParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从cookie中获取参数</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p><strong>说明</strong>：</p>
+  <ul>
+    <li>当方法参数没有注解，且不为HttpServletRequest类型参数时，默认为body类型参数，一个方法只支持最多一个body类型参数。</li>
+    <li>打在参数上面的注解建议显式定义出value值，否则将直接使用契约中的参数名，例如应该使用<code class="highlighter-rouge">@QueryParam\("name"\) String name</code>，而不是<code class="highlighter-rouge">@QueryParam String name</code>。</li>
+  </ul>
+</blockquote>
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+    <meta itemprop="headline" content="使用Rest Template方式开发">
+    <meta itemprop="description" content="使用Rest Template方式开发">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用Rest Template方式开发
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#示例代码" id="markdown-toc-示例代码">示例代码</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>　　Rest Template是Spring提供的RESTful访问接口，ServiceComb提供该接口的实现类用于服务的调用。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>　　用户使用ServiceComb提供的Rest Template实例，可以使用自定义的URL进行服务调用，而不用关心服务的具体地址。</p>
+
+<h2 id="示例代码">示例代码</h2>
+
+<p>　　Rest Template实例通过调用<code class="highlighter-rouge">RestTemplateBuilder.create()</code>方法获取，再使用该实例通过自定义的URL进行服务调用，代码如下：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.springframework.stereotype.Component</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.web.client.RestTemplate</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.springmvc.reference.RestTemplateBuilder</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+<span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcConsumerMain</span> <span class="o">{</span>
+    <span class="kd">private</span> <span class="kd">static</span> <span class="nc">RestTemplate</span> <span class="n">restTemplate</span> <span class="o">=</span> <span class="nc">RestTemplateBuilder</span><span class="o">.</span><span class="na">create</span><span class="o">();</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="n">init</span><span class="o">();</span>
+        <span class="nc">Person</span> <span class="n">person</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">();</span>
+        <span class="n">person</span><span class="o">.</span><span class="na">setName</span><span class="o">(</span><span class="s">"ServiceComb/Java Chassis"</span><span class="o">);</span>
+        <span class="nc">String</span> <span class="n">sayHiResult</span> <span class="o">=</span> <span class="n">restTemplate</span>
+                <span class="o">.</span><span class="na">postForObject</span><span class="o">(</span><span class="s">"cse://springmvc/springmvchello/sayhi?name=Java Chassis"</span><span class="o">,</span> <span class="kc">null</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+        <span class="nc">String</span> <span class="n">sayHelloResult</span> <span class="o">=</span> <span class="n">restTemplate</span>
+                <span class="o">.</span><span class="na">postForObject</span><span class="o">(</span><span class="s">"cse://springmvc/springmvchello/sayhello"</span><span class="o">,</span> <span class="n">person</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"RestTemplate consumer sayhi services: "</span> <span class="o">+</span> <span class="n">sayHiResult</span><span class="o">);</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"RestTemplate consumer sayhello services: "</span> <span class="o">+</span> <span class="n">sayHelloResult</span><span class="o">);</span>
+    <span class="o">}</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">()</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>说明：</p>
+  <ul>
+    <li>URL格式为：<code class="highlighter-rouge">cse://microserviceName/path?querystring</code>。以<a href="/cn/users/develop-with-springmvc/">用SpringMVC开发微服务</a>中定义的服务提供者为例，其微服务名称是<code class="highlighter-rouge">springmvc</code>，basePath是<code class="highlighter-rouge">/springmvchello</code>，那么URL中的microserviceName是<code class="highlighter-rouge">springmvc</code>，请求sayhi时的path是<code class="highlighter-rouge">springmvchello/sayhi</code>，所以示例代码中请求sayhi的URL是<code class="highlighter-rouge">cse://springmvc/springmvchello/sayhi?name=Java Chassis</code>。</li>
+    <li>使用这种URL格式，ServiceComb框架会在内部进行服务发现、熔断容错等处理并最终将请求发送到服务提供者。</li>
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+    <meta itemprop="headline" content="使用RPC方式开发">
+    <meta itemprop="description" content="使用RPC方式开发">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用RPC方式开发
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#示例代码" id="markdown-toc-示例代码">示例代码</a>    <ul>
+      <li><a href="#调用方式的补充说明" id="markdown-toc-调用方式的补充说明">调用方式的补充说明</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>RPC开发方式允许用户通过在服务接口上标注注解来生成服务提供者代理，从而进行服务的调用。</p>
+
+<h2 id="示例代码">示例代码</h2>
+
+<p>只需要声明一个服务接口类型的成员，并且使用<code class="highlighter-rouge">@RpcReference</code>标注该成员，声明依赖的微服务及schemaId，即可进行服务调用，示例代码如下：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.springframework.stereotype.Component</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.pojo.RpcReference</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.Hello</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+<span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CodeFirstConsumerMain</span> <span class="o">{</span>
+    <span class="nd">@RpcReference</span><span class="o">(</span><span class="n">microserviceName</span> <span class="o">=</span> <span class="s">"codefirst"</span><span class="o">,</span> <span class="n">schemaId</span> <span class="o">=</span> <span class="s">"codeFirstHello"</span><span class="o">)</span>
+    <span class="kd">private</span> <span class="kd">static</span> <span class="nc">Hello</span> <span class="n">hello</span><span class="o">;</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="n">init</span><span class="o">();</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">hello</span><span class="o">.</span><span class="na">sayHi</span><span class="o">(</span><span class="s">"Java Chassis"</span><span class="o">));</span>
+        <span class="nc">Person</span> <span class="n">person</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">();</span>
+        <span class="n">person</span><span class="o">.</span><span class="na">setName</span><span class="o">(</span><span class="s">"ServiceComb/Java Chassis"</span><span class="o">);</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">hello</span><span class="o">.</span><span class="na">sayHello</span><span class="o">(</span><span class="n">person</span><span class="o">));</span>
+    <span class="o">}</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">()</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>在以上代码中，服务消费者已经取得了服务提供者的服务接口<code class="highlighter-rouge">Hello</code>，并在代码中声明一个<code class="highlighter-rouge">Hello</code>类型的成员。通过在<code class="highlighter-rouge">hello</code>上使用<code class="highlighter-rouge">@RPCReference</code>注解指明微服务名称和schemaId，ServiceComb框架可以在程序启动时从服务中心获取到对应的服务提供者实例信息，并且生成一个代理注入到hello中，用户可以像调用本地类一样调用远程服务。</p>
+
+<h3 id="调用方式的补充说明">调用方式的补充说明</h3>
+<p>上面示例代码中，为了能在main函数中直接使用hello变量，我们将它标记为<code class="highlighter-rouge">static</code>。作为CodeFirstConsumerMain这个Bean的本地变量，我们更推荐下面两种做法：</p>
+<h4 id="方式1通过cserpc-reference定义">方式1：通过cse:rpc-reference定义</h4>
+<p>在你的bean.xml中添加cse:rpc-reference的配置项：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;cse:rpc-reference</span> <span class="na">id=</span><span class="s">"hello"</span> <span class="na">microservice-name=</span><span class="s">"codefirst"</span>
+    <span class="na">schema-id=</span><span class="s">"codeFirstHello"</span> <span class="na">interface=</span><span class="s">"org.apache.servicecomb.samples.common.schema.Hello"</span><span class="nt">&gt;&lt;/cse:rpc-reference&gt;</span>
+</code></pre></div></div>
+
+<p>然后就可以使用<code class="highlighter-rouge">BeanUtils.getBean</code>直接获取服务提供者的服务接口<code class="highlighter-rouge">Hello</code>：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Hello</span> <span class="n">hello</span> <span class="o">=</span> <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">getBean</span><span class="o">(</span><span class="s">"hello"</span><span class="o">);</span>
+</code></pre></div></div>
+
+<h4 id="方式2获取bean再获取接口">方式2：获取Bean，再获取接口</h4>
+<p>先使用<code class="highlighter-rouge">BeanUtils.getBean</code>获取到CodeFirstConsumerMain这个Bean：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1">//Spring Bean 实例默认名为类名的小写</span>
+<span class="nc">CodeFirstConsumerMain</span> <span class="n">consumer</span> <span class="o">=</span> <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">getBean</span><span class="o">(</span><span class="s">"codeFirstConsumerMain"</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p>然后按Getter的方式获取hello：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="nc">Hello</span> <span class="nf">getHello</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">hello</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Hello</span> <span class="n">hello</span> <span class="o">=</span> <span class="n">consumer</span><span class="o">.</span><span class="na">getHello</span><span class="o">()</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>说明：
+<code class="highlighter-rouge">BeanUtils.getBean</code>有锁，因此有性能问题，无论是哪种方式，推荐一次调用（例如在构造函数中）获取缓存起来作为一个本地变量反复使用。</p>
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+    <meta itemprop="headline" content="用Spring Boot Starter开发微服务">
+    <meta itemprop="description" content="用Spring Boot Starter开发微服务">
+    
+    <meta itemprop="dateModified" content="April 23, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">用Spring Boot Starter开发微服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a>    <ul>
+      <li><a href="#springboot框架" id="markdown-toc-springboot框架">SpringBoot框架</a></li>
+      <li><a href="#在servicecomb中集成springboot" id="markdown-toc-在servicecomb中集成springboot">在ServiceComb中集成SpringBoot</a></li>
+    </ul>
+  </li>
+  <li><a href="#开发示例" id="markdown-toc-开发示例">开发示例</a></li>
+  <li><a href="#涉及api" id="markdown-toc-涉及api">涉及API</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+<h3 id="springboot框架">SpringBoot框架</h3>
+<p>Spring Boot是由Pivotal团队提供的全新框架，其设计目的是用来简化新Spring应用的初始搭建以及开发过程。该框架使用了特定的方式来进行配置，从而使开发人员不再需要定义样板化的配置。从最根本上来讲，Spring Boot就是一些库的集合，它能够被任意项目的构建系统所使用。Boot的功能是模块化的，通过导入Boot所谓的”starter”模块，可以将许多的依赖添加到工程中。</p>
+
+<h3 id="在servicecomb中集成springboot">在ServiceComb中集成SpringBoot</h3>
+<p>使用原生的ServiceComb框架开发微服务应用，如若需要使用ServiceComb框架提供的各项功能服务，需要在微服务项目工程pom文件中添加相应的依赖包，例如需要使用ServiceComb框架提供的负载均衡服务，需要添加handler-loadbalance包依赖。这样可以把ServiceComb提供的能力以starter的方式插入Spring Boot中，同时使用Spring Boot中提供的其他开箱即用的starter（例如SpringCloud）一起构建微服务。</p>
+
+<h2 id="开发示例">开发示例</h2>
+<ul>
+  <li>
+    <p><strong>步骤 1</strong> 添加依赖。</p>
+
+    <p>在Maven的pom.xml中添加所需的依赖：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+      <span class="nt">&lt;dependencies&gt;</span>
+        <span class="nt">&lt;dependency&gt;</span>
+          <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+          <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+          <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+          <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+          <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+        <span class="nt">&lt;/dependency&gt;</span>
+      <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+      <span class="nt">&lt;dependency&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;/dependency&gt;</span>
+      <span class="c">&lt;!--spring-boot-starter-provider中已经包含transport-rest-vertx和transport-highway--&gt;</span>
+      <span class="nt">&lt;dependency&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;/dependency&gt;</span>
+      <span class="nt">&lt;dependency&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.hibernate<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>hibernate-validator<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 实现服务。</p>
+
+    <p>使用Spring MVC注解开发业务代码，Hello的服务实现如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestBody</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMapping</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMethod</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestParam</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+   
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/springmvchello"</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhi"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nd">@RequestParam</span><span class="o">(</span><span class="n">name</span> <span class="o">=</span> <span class="s">"name"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhello"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+ <span class="err">　</span><span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><strong>注意：请一定在服务的实现类（本文档例子为SpringmvcHelloImpl）上标记@RequestMapping，否则接口发布的Path和Method将会不正确！</strong></p>
+
+    <p>本例sayHi的访问Path为<code class="highlighter-rouge">/springmvchello/sayhi</code>，sayHello的访问Path为<code class="highlighter-rouge">/springmvchello/sayhello</code>，如果希望他们的访问路径为<code class="highlighter-rouge">/sayhi</code>和<code class="highlighter-rouge">/sayhello</code>，直接设置SpringmvcHelloImpl上的<code class="highlighter-rouge">@RequestMapping</code>为<code class="highlighter-rouge">@RequestMapping(path = "/")</code>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 发布服务</p>
+
+    <p>在服务的实现类上打上注解@RestSchema，指定schemaId，表示该实现作为当前微服务的一个schema发布，代码如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+ <span class="c1">// other code omitted</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"springmvcHello"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="c1">// other code omitted</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>然后在<code class="highlighter-rouge">resources/META-INF/spring</code>目录下创建<code class="highlighter-rouge">springmvcHello.bean.xml</code>文件，命名规则为<code class="highlighter-rouge">\*.bean.xml</code>，配置spring进行服务扫描的base-package，文件内容如下：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+   
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span>
+        <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd
+        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"</span><span class="nt">&gt;</span>
+   
+     <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.springmvc.provider"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<blockquote>
+  <p><strong>说明</strong>：
+Spring Boot已经包含了默认的Bean扫描策略，如果能够保证Spring Boot能够找到我们的<code class="highlighter-rouge">SpringmvcHelloImpl</code>，那么无需定义<code class="highlighter-rouge">springmvcHello.bean.xml</code>。</p>
+</blockquote>
+
+<ul>
+  <li>
+    <p><strong>步骤 4</strong> 添加服务定义。</p>
+
+    <p>在resources目录中添加<a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 5</strong> 添加Main启动类</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="kn">import</span> <span class="nn">org.apache.servicecomb.springboot.starter.provider.EnableServiceComb</span><span class="o">;</span>
+  <span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
+  <span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
+
+  <span class="nd">@SpringBootApplication</span>
+  <span class="c1">//EnableServiceComb注解用于在Spring Boot程序内拉起ServiceComb</span>
+  <span class="nd">@EnableServiceComb</span>
+  <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+      <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">Application</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="涉及api">涉及API</h2>
+
+<p>用Spring Boot Starter开发微服务同样使用Spring MVC开发模式，当前支持org.springframework.web.bind.annotation包下的如下注解，所有注解的使用方法参考<a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html">Spring MVC官方文档</a>。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">注解</th>
+      <th style="text-align: left">位置</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">RequestMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/method/produces三种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">GetMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PutMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PostMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">DeleteMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
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+    <tr>
+      <td style="text-align: left">PatchMapping</td>
+      <td style="text-align: left">schema/operation</td>
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+    <meta itemprop="headline" content="用SpringMVC开发微服务">
+    <meta itemprop="description" content="用SpringMVC开发微服务">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">用SpringMVC开发微服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#开发示例" id="markdown-toc-开发示例">开发示例</a></li>
+  <li><a href="#涉及api" id="markdown-toc-涉及api">涉及API</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>ServiceComb支持SpringMVC注解，允许使用SpringMVC风格开发微服务。</p>
+
+<h2 id="开发示例">开发示例</h2>
+<ul>
+  <li>
+    <p><strong>步骤 1</strong> 添加依赖。</p>
+
+    <p>在Maven的pom.xml中添加所需的依赖：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="c">&lt;!--transport根据microservice.yaml中endpoint发布需求选择，本例中两者都引入，也可以二选一--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>provider-springmvc<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>slf4j-log4j12<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 实现服务。</p>
+
+    <p>使用Spring MVC注解开发业务代码，Hello的服务实现如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestBody</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMapping</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMethod</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestParam</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+   
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/springmvchello"</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhi"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nd">@RequestParam</span><span class="o">(</span><span class="n">name</span> <span class="o">=</span> <span class="s">"name"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhello"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+ <span class="err">　</span><span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><strong>注意：请一定在服务的实现类（本文档例子为SpringmvcHelloImpl）上标记@RequestMapping，否则接口发布的Path和Method将会不正确！</strong></p>
+
+    <p>本例sayHi的访问Path为<code class="highlighter-rouge">/springmvchello/sayhi</code>，sayHello的访问Path为<code class="highlighter-rouge">/springmvchello/sayhello</code>，如果希望他们的访问路径为<code class="highlighter-rouge">/sayhi</code>和<code class="highlighter-rouge">/sayhello</code>，直接设置SpringmvcHelloImpl上的<code class="highlighter-rouge">@RequestMapping</code>为<code class="highlighter-rouge">@RequestMapping(path = "/")</code>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 发布服务</p>
+
+    <p>在服务的实现类上打上注解@RestSchema，指定schemaId，表示该实现作为当前微服务的一个schema发布，代码如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+ <span class="c1">// other code omitted</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"springmvcHello"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="c1">// other code omitted</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>然后在<code class="highlighter-rouge">resources/META-INF/spring</code>目录下创建<code class="highlighter-rouge">springmvcHello.bean.xml</code>文件，命名规则为<code class="highlighter-rouge">\*.bean.xml</code>，配置spring进行服务扫描的base-package，文件内容如下：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+   
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span>
+        <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd
+        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"</span><span class="nt">&gt;</span>
+   
+     <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.springmvc.provider"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 4</strong> 添加服务定义。</p>
+
+    <p>在resources目录中添加<a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 5</strong> 添加Main启动类</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+      <span class="c1">//初始化日志， 加载Bean(包括它们的参数), 以及注册Service, 更多信息可以参见文档 : https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/bootup.html</span>
+      <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+      <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="涉及api">涉及API</h2>
+
+<p>Spring MVC开发模式当前支持org.springframework.web.bind.annotation包下的如下注解，所有注解的使用方法参考<a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html">Spring MVC官方文档</a>。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">注解</th>
+      <th style="text-align: left">位置</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">RequestMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/method/produces三种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">GetMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PutMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PostMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">DeleteMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PatchMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">支持标注path/produces两种数据，operation默认继承schema上的produces</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PathVariable</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从path中获取参数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">RequestParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从query中获取参数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">RequestHeader</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从header中获取参数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">RequestBody</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">从body中获取参数，每个operation只能有一个body参数</td>
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+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">用透明RPC开发微服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#开发示例" id="markdown-toc-开发示例">开发示例</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>透明RPC开发模式是一种基于接口和接口实现的开发模式，服务的开发者不需要使用Spring MVC和JAX-RS注解。</p>
+
+<h2 id="开发示例">开发示例</h2>
+<ul>
+  <li>
+    <p><strong>步骤 1</strong> 添加依赖：</p>
+
+    <p>在Maven的pom.xml中添加所需的依赖：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="c">&lt;!--transport根据microservice.yaml中endpoint发布需求选择，本例中两者都引入，也可以二选一--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>provider-pojo<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>slf4j-log4j12<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 定义服务接口：</p>
+
+    <p>根据开发之前定义好的契约，编写Java业务接口，代码如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">interface</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">);</span>
+   <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 实现服务：</p>
+
+    <p>Hello的服务实现如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.Hello</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 4</strong> 发布服务</p>
+
+    <p>透明RPC开发模式支持Spring xml配置和注解配置两种服务发布方式：</p>
+  </li>
+</ul>
+
+<ol>
+  <li>
+    <p>使用Spring xml配置方式：
+在resources/META-INF/spring目录下创建pojoHello.bean.xml文件，在文件中声明schema，文件内容如下：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+       <span class="na">xmlns:p=</span><span class="s">"http://www.springframework.org/schema/p"</span> <span class="na">xmlns:util=</span><span class="s">"http://www.springframework.org/schema/util"</span>
+       <span class="na">xmlns:cse=</span><span class="s">"http://www.huawei.com/schema/paas/cse/rpc"</span>
+       <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+       <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.huawei.com/schema/paas/cse/rpc classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span class="nt">&gt;</span>
+
+    <span class="nt">&lt;cse:rpc-schema</span> <span class="na">schema-id=</span><span class="s">"pojoHello"</span> <span class="na">implementation=</span><span class="s">"org.apache.servicecomb.samples.pojo.provider.PojoHelloImpl"</span><span class="nt">/&gt;</span>
+<span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>使用注解配置方式：</p>
+
+    <p>在接口Hello的实现类上使用@RpcSchema注解定义schema，代码如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.pojo.RpcSchema</span><span class="o">;</span>
+<span class="nd">@RpcSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"pojoHello"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+ 
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>在resources/META-INF/spring目录下的pojoHello.bean.xml文件中，配置Spring进行服务扫描的base-package，文件内容如下：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+       <span class="na">xmlns:p=</span><span class="s">"http://www.springframework.org/schema/p"</span> <span class="na">xmlns:util=</span><span class="s">"http://www.springframework.org/schema/util"</span>
+       <span class="na">xmlns:cse=</span><span class="s">"http://www.huawei.com/schema/paas/cse/rpc"</span>
+       <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+       <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.huawei.com/schema/paas/cse/rpc classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span class="nt">&gt;</span>
+   
+    <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.pojo.provider"</span><span class="nt">/&gt;</span>
+<span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p><strong>注意：无论哪种发布模式，RPC发布的URL都为<code class="highlighter-rouge">ClassName/MethodName</code>，并且Method都为<code class="highlighter-rouge">POST</code>。</strong></p>
+
+<p>本例sayHi的访问Path为<code class="highlighter-rouge">/HelloImpl/sayHi</code>，sayHello的访问Path为<code class="highlighter-rouge">/HelloImpl/sayHello</code>。</p>
+
+<blockquote>
+  <p><strong>说明</strong>：
+与Spring MVC开发模式和JAX-RS开发模式不同的是，透明RPC开发模式使用的注解是<code class="highlighter-rouge">@RpcSchema</code>而非<code class="highlighter-rouge">@RestSchema</code>。</p>
+</blockquote>
+
+<ul>
+  <li>
+    <p><strong>步骤 5</strong> 添加服务定义。</p>
+
+    <p>在resources目录中添加<a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 6</strong> 添加Main启动类</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+      <span class="c1">//初始化日志， 加载Bean(包括它们的参数), 以及注册Service, 更多信息可以参见文档 : https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/bootup.html</span>
+      <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+      <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
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+    <meta itemprop="headline" content="分布式调用链追踪">
+    <meta itemprop="description" content="分布式调用链追踪">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">分布式调用链追踪
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#zipkin" id="markdown-toc-zipkin">Zipkin</a></li>
+  <li><a href="#使用步骤" id="markdown-toc-使用步骤">使用步骤:</a>    <ul>
+      <li><a href="#添加依赖" id="markdown-toc-添加依赖">添加依赖</a></li>
+      <li><a href="#配置追踪处理和数据收集" id="markdown-toc-配置追踪处理和数据收集">配置追踪处理和数据收集</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>微服务架构解决了很多单体应用带来的问题，但同时也需要我们付出额外的代价。由于网络的不稳定性带来的请求处理延迟就是代价之一。</p>
+
+<p>在单体应用中，所有模块都在同一个进程中运行，所以并没有模块间互通的问题。但微服务架构中，服务间通过网络沟通，因此我们不得不处理和网络有关的 问题，例如：延迟、超时、网络分区等。</p>
+
+<p>另外，随着业务的扩展服务增多，我们很难洞察数据如何在蛛网般复杂的服务结构中流转。我们如何才能有效的监控网络延迟并且可视化服务中的数据流转呢？</p>
+
+<p><strong>分布式调用链追踪</strong>用于有效地监控微服务的网络延时并可视化微服务中的数据流转。</p>
+
+<h2 id="zipkin">Zipkin</h2>
+
+<blockquote>
+  <p><a href="http://zipkin.io/">Zipkin</a>是一个分布式调用链追踪系统。 它能帮助用户收集时序数据用以定位微服务中的延迟问题，它同时管理追踪数据的收集 和查询。Zipkin 的设计基于 Google <a href="http://research.google.com/pubs/pub36356.html">Dapper paper</a>。</p>
+</blockquote>
+
+<p>ServiceComb 集成了 Zipkin 提供自动调用链追踪能力，如此一来用户只需要专注实现其业务需求。</p>
+
+<h2 id="使用步骤">使用步骤:</h2>
+
+<h3 id="添加依赖">添加依赖</h3>
+
+<p>基于 ServiceComb Java Chassis 的微服务只需要添加如下依赖到 pom.xml：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>   
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>如果微服务是基于 Spring Cloud + Zuul 的 API 网关，例如 workshop demo 中的 manager service ，我们还需要加入如下的额外依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>    
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="配置追踪处理和数据收集">配置追踪处理和数据收集</h3>
+
+<p>在microservice.yaml文件中设置追踪处理器和数据收集服务地址</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span> 
+  <span class="na">handler</span><span class="pi">:</span> 
+    <span class="na">chain</span><span class="pi">:</span> 
+      <span class="na">Consumer</span><span class="pi">:</span> 
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-consumer</span>
+      <span class="na">Provider</span><span class="pi">:</span> 
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+  <span class="na">tracing</span><span class="pi">:</span> 
+    <span class="na">collector</span><span class="pi">:</span> 
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://zipkin.servicecomb.io:9411</span>
+</code></pre></div></div>
+
+<p>就这样，在加了两个配置项，没改动一行代码的情况下，我们启动了基于 Zipkin 和 Java chassis 的分布式调用链追踪的功能。</p>
+
+<p class="notice--warning"><strong>注意：</strong> 如果项目中的其他依赖也引入了 zipkin （例如 Spring Cloud），可能导致 zipkin 版本不一致而运行出错，这时需要在项目 pom 中声明 zipkin 版本。</p>
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+    <meta itemprop="headline" content="动态配置">
+    <meta itemprop="description" content="动态配置">
+    
+    <meta itemprop="dateModified" content="January 11, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">动态配置
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#使用步骤" id="markdown-toc-使用步骤">使用步骤:</a>    <ul>
+      <li><a href="#部署并启动apollo配置中心" id="markdown-toc-部署并启动apollo配置中心">部署并启动Apollo配置中心</a></li>
+      <li><a href="#通过apollo界面配置应用获取token" id="markdown-toc-通过apollo界面配置应用获取token">通过Apollo界面配置应用获取TOKEN</a></li>
+      <li><a href="#在应用中添加依赖" id="markdown-toc-在应用中添加依赖">在应用中添加依赖</a></li>
+      <li><a href="#添加配置项" id="markdown-toc-添加配置项">添加配置项</a></li>
+      <li><a href="#获取动态属性" id="markdown-toc-获取动态属性">获取动态属性</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>动态配置能够在服务运行期间对服务自身和服务依赖的配置信息进行热修改。传统的配重信息处理方式是将配置信息写入xml、properties等配置文件中和应用一起打包，每次修改配置信息都需要重新打包部署，效率极低，且由于微服务架构中应用数量，应用依赖的配置数量会使配置信息的维护非常困难。动态配置功能就是为了解决这个问题。通过配置中心对服务依赖的配置信息进行修改，服务端主动查询或者配置中心下发都可以达到不用重新部署服务而改变其配置信息的目的。Java Chassis目前支持对接配置中心Apollo，用户可以通过实现Java Chassis提供的扩展接口很简单的对接到其他配置中心。</p>
+
+<h2 id="使用步骤">使用步骤:</h2>
+
+<h3 id="部署并启动apollo配置中心">部署并启动Apollo配置中心</h3>
+
+<p>通过镜像方式启动Apollo配置中心请参考<a href="https://github.com/ctripcorp/apollo/wiki/Apollo-Quick-Start-Docker%E9%83%A8%E7%BD%B2">官方文档</a>，或者执行下面两个指令即可：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   git clone https://github.com/lijasonvip/apollo-image-for-servicecomb.git
+   <span class="nb">cd </span>apollo-image-for-servicecomb <span class="o">&amp;&amp;</span> docker-compose up
+</code></pre></div></div>
+<p>等待出现 <code class="highlighter-rouge">Portal started. You can visit http://localhost:8070 now!</code> 后表示系统启动完成（启动时间基于机器性能可能需要1-3分钟），可以在浏览器中访问<code class="highlighter-rouge">http://localhost:8070</code>进入配置中心页面。 <code class="highlighter-rouge">docker-compose</code>安装请参考<a href="https://docs.docker.com/compose/install/">文档</a>。</p>
+
+<h3 id="通过apollo界面配置应用获取token">通过Apollo界面配置应用获取TOKEN</h3>
+
+<ul>
+  <li>
+    <h5 id="登录apollo配置中心创建项目">登录Apollo配置中心创建项目</h5>
+
+    <p>在浏览器中输入登录地址，地址是容器所在主机的<code class="highlighter-rouge">IP:PORT</code>端口默认8070，如<code class="highlighter-rouge">http://192.168.199.1:8070</code></p>
+
+    <p><img src="/assets/images/config/login.png" alt="登录配置中心" /></p>
+
+    <p>Apollo配置中心的默认登录账号是apollo/admin，点击登录后会跳转到下图中的配置中心首页。</p>
+  </li>
+  <li>
+    <h5 id="创建项目">创建项目</h5>
+
+    <p><img src="/assets/images/config/create_project.png" alt="创建项目" /></p>
+
+    <p>首页中默认展示一个示例项目SampleApp，用户可以点击创建项目自行创建一个，下图是创建项目页面，填入应用Id和应用名称，选择所在部门和应用负责人后点击提交即可。</p>
+  </li>
+</ul>
+
+<p><img src="/assets/images/config/create_project2.png" alt="项目信息" /></p>
+
+<p>​	需要注意的是，首次创建好一个项目后要发布之后客户端才能查询到该项目信息。如下图红框中的提示，点击发布即可。</p>
+
+<p><img src="/assets/images/config/release_namespace.png" alt="release_namespace" /></p>
+
+<ul>
+  <li>
+    <h5 id="生成token">生成TOKEN</h5>
+  </li>
+</ul>
+
+<p>打开地址<code class="highlighter-rouge">http://192.168.199.1:8070/open/manage.html</code>进入下图页面，填入刚才创建项目使的应用名选择相应的部门和项目负责人即可生成应用对应的TOKEN，保存这个TOKEN稍后配置到项目代码中即可。</p>
+
+<p><img src="/assets/images/config/token.png" alt="生成TOKEN" /></p>
+
+<h3 id="在应用中添加依赖">在应用中添加依赖</h3>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+          <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+          <span class="nt">&lt;artifactId&gt;</span>config-apollo<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<h3 id="添加配置项">添加配置项</h3>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="na">apollo</span><span class="pi">:</span>
+     <span class="na">config</span><span class="pi">:</span>
+       <span class="na">serverUri</span><span class="pi">:</span> <span class="s">http://127.0.0.1:8070</span>
+       <span class="na">serviceName</span><span class="pi">:</span> <span class="s">SampleApp</span>
+       <span class="na">env</span><span class="pi">:</span> <span class="s">DEV</span>
+       <span class="na">clusters</span><span class="pi">:</span> <span class="s">default</span>
+       <span class="na">namespace</span><span class="pi">:</span> <span class="s">application</span>
+       <span class="na">token</span><span class="pi">:</span> <span class="s">testtoken</span>
+       <span class="na">refreshInterval</span><span class="pi">:</span> <span class="m">10</span>
+</code></pre></div></div>
+<p>​	<code class="highlighter-rouge">apollo.config</code>下的配置项是用户创建的应用参数，包括服务地址，用户名，集群，namespace，token等参数。这些参数可以在配置中心页面项目信息栏中查到。需要注意的是<code class="highlighter-rouge">refreshInterval: 10</code>表示应用会每隔10秒去配置中心查询一次最新的配置信息，不配置此项默认刷新周期为30秒。
+  <code class="highlighter-rouge">serviceName</code>对应Apollo中的第三发应用ID: <code class="highlighter-rouge">AppId</code>.</p>
+
+<h3 id="获取动态属性">获取动态属性</h3>
+
+<p>​	在配置中心中创建一个<code class="highlighter-rouge">timeout</code>的配置项，其值设置为<code class="highlighter-rouge">100</code>，并发布如下图：	<img src="/assets/images/config/release_config.png" alt="动态属性timeout" /></p>
+
+<p>​	代码中可以使用<code class="highlighter-rouge">DynamicPropertyFactory.getInstance().getProperty()</code>方法来获取具体的配置项值，<code class="highlighter-rouge">getProperty</code>方法可以根据配置项具体的类型来灵活使用，比如<code class="highlighter-rouge">getIntProperty()</code>,<code class="highlighter-rouge">getStringProperty()</code>等。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="kd">public</span> <span class="kd">class</span> <span class="nc">XXX</span> <span class="o">{</span>
+      <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="k">while</span> <span class="o">(</span><span class="kc">true</span><span class="o">)</span> <span class="o">{</span>
+          <span class="nc">DynamicIntProperty</span> <span class="n">timeout</span> <span class="o">=</span> <span class="nc">DynamicPropertyFactory</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span>
+            <span class="n">getIntProperty</span><span class="o">(</span><span class="s">"timeout"</span><span class="o">,</span> <span class="o">-</span><span class="mi">1</span><span class="o">);</span>
+          <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">timeout</span><span class="o">);</span>
+          <span class="nc">Thread</span><span class="o">.</span><span class="na">sleep</span><span class="o">(</span><span class="mi">3000</span><span class="o">);</span>
+        <span class="o">}</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+</code></pre></div></div>
+<p>​	Apollo配置中心修改配置项并发布后，经过一个刷新周期后就会打印出最新的<code class="highlighter-rouge">timeout</code>值。</p>
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+
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">使用内置Edge模块实现边缘服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#edge特性" id="markdown-toc-edge特性">Edge特性</a>    <ul>
+      <li><a href="#与微服务松耦合" id="markdown-toc-与微服务松耦合">与微服务松耦合</a></li>
+      <li><a href="#自动匹配版本" id="markdown-toc-自动匹配版本">自动匹配版本</a></li>
+      <li><a href="#支持consumer治理" id="markdown-toc-支持consumer治理">支持Consumer治理</a></li>
+      <li><a href="#默认使用reactive工作模式" id="markdown-toc-默认使用reactive工作模式">默认使用Reactive工作模式</a></li>
+    </ul>
+  </li>
+  <li><a href="#开发edge-service" id="markdown-toc-开发edge-service">开发Edge Service</a>    <ul>
+      <li><a href="#引入依赖" id="markdown-toc-引入依赖">引入依赖</a></li>
+      <li><a href="#开发dispatcher" id="markdown-toc-开发dispatcher">开发Dispatcher</a></li>
+      <li><a href="#加载dispatcher" id="markdown-toc-加载dispatcher">加载Dispatcher</a></li>
+      <li><a href="#扩展handler可选" id="markdown-toc-扩展handler可选">扩展Handler（可选）</a></li>
+    </ul>
+  </li>
+  <li><a href="#参考示例" id="markdown-toc-参考示例">参考示例</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>微服务框架从1.0.0-m1版本开始提供内置Edge模块，请通过查看用户手册和Release Note获取更多信息，我们也会继续追加新特性新功能，欢迎订阅ServiceComb邮件列表(dev-subscribe@servicecomb.apache.org)参与讨论。</p>
+
+<h2 id="edge特性">Edge特性</h2>
+<h3 id="与微服务松耦合">与微服务松耦合</h3>
+<p>Edge Service仅仅转发微服务请求，与目标微服务之间没有任何依赖关系。</p>
+
+<h3 id="自动匹配版本">自动匹配版本</h3>
+<p>默认情况下，Edge Service会自动匹配版本操作，例如微服务：</p>
+<ul>
+  <li>在1.0.0版本中提供了Operation1</li>
+  <li>在1.1.0版本中提供了Operation1和Operation2</li>
+</ul>
+
+<p>Edge Service转发Operation1的请求将允许1.0.0版本和1.1.0版本的微服务实例，转发Operation2时，只会选择1.1.0版本的微服务实例。</p>
+
+<h3 id="支持consumer治理">支持Consumer治理</h3>
+<p>支持所有Java Chassis Consumer治理Handler，也支持用户扩展Handler。</p>
+
+<h3 id="默认使用reactive工作模式">默认使用Reactive工作模式</h3>
+<p>由于Edge Service转发所有API调用，对性能有较高要求，所以默认使用Reactive模式工作，请不要在转发流程代码中增加阻塞操作，例如：</p>
+<ul>
+  <li>数据库查询、远程调用等；</li>
+  <li>sleep、wait等；</li>
+  <li>大循环或耗时操作等。</li>
+</ul>
+
+<h2 id="开发edge-service">开发Edge Service</h2>
+<h3 id="引入依赖">引入依赖</h3>
+<p>只需要引入edge-core依赖即可：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>edge-core<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="开发dispatcher">开发Dispatcher</h3>
+<p>要实现Edge Service转发功能，需要开发Dispatcher并继承接口org.apache.servicecomb.transport.rest.vertx.VertxHttpDispatcher或org.apache.servicecomb.transport.rest.vertx.AbstractVertxHttpDispatcher，重写其中的三个方法：</p>
+<h4 id="getorder方法">getOrder方法</h4>
+<p>Dispatcher向Vertx注入路由规则时的优先顺序，值越小优先级越高。</p>
+
+<h4 id="init方法">init方法</h4>
+<p>初始化Dispatcher的路由规则，使用的是<a href="https://vertx.io/docs/vertx-web/java/#_routing_by_exact_path">Vertx路由规则</a>，例如我们添加两条匹配策略：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">(</span><span class="nc">Router</span> <span class="n">router</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">String</span> <span class="n">regex</span> <span class="o">=</span> <span class="s">"/([^\\\\/]+)/([^\\\\/]+)/(.*)"</span><span class="o">;</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="nc">CookieHandler</span><span class="o">.</span><span class="na">create</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="n">createBodyHandler</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">failureHandler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onFailure</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onRequest</span><span class="o">);</span>
+
+  <span class="n">regex</span> <span class="o">=</span> <span class="s">"/([^\\\\/]+)/(.*)"</span><span class="o">;</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="nc">CookieHandler</span><span class="o">.</span><span class="na">create</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="n">createBodyHandler</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">failureHandler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onFailure</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onRequest</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<ol>
+  <li>/([^\/]+)/([^\/]+)/(.*) : 这条策略我们希望匹配带版本的微服务请求，例如/user-service/v0/validate；</li>
+  <li>/([^\/]+)/(.*) : 这条策略用于匹配不带版本的微服务请求，例如/user-service/validate。</li>
+</ol>
+
+<h4 id="onrequest方法">onRequest方法</h4>
+<p>转发策略，方法原型为：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kt">void</span> <span class="nf">onRequest</span><span class="o">(</span><span class="nc">RoutingContext</span> <span class="n">context</span><span class="o">)</span>
+</code></pre></div></div>
+
+<p>从context中可以获取到请求目标微服务名，path等信息，之后创建EdgeInvocation并初始化，完成调用：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">EdgeInvocation</span> <span class="n">edgeInvocation</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">EdgeInvocation</span><span class="o">();</span>
+<span class="n">edgeInvocation</span><span class="o">.</span><span class="na">setVersionRule</span><span class="o">(</span><span class="n">versionRule</span><span class="o">);</span>
+<span class="n">edgeInvocation</span><span class="o">.</span><span class="na">init</span><span class="o">(</span><span class="n">serviceName</span><span class="o">,</span> <span class="n">context</span><span class="o">,</span> <span class="n">path</span><span class="o">,</span> <span class="n">httpServerFilters</span><span class="o">);</span>
+<span class="n">edgeInvocation</span><span class="o">.</span><span class="na">edgeInvoke</span><span class="o">();</span>
+</code></pre></div></div>
+
+<h3 id="加载dispatcher">加载Dispatcher</h3>
+<p>Edge Service使用SPI机制加载用户自定义的VertxHttpDispatcher，我们在resources文件夹下创建META-INF/services文件夹，之后添加org.apache.servicecomb.transport.rest.vertx.VertxHttpDispatcher文件，在文件中，添加写好的Dispatcher即可：</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>{your-package-path}.XXXDispatcher
+</code></pre></div></div>
+
+<h3 id="扩展handler可选">扩展Handler（可选）</h3>
+<p>由于Edge Service需要承载统一认证、集中监控等功能，我们推荐扩展Handler的方式实现，在demo-edge中的edge-service中有AuthHandler的示例。</p>
+
+<h2 id="参考示例">参考示例</h2>
+<p>我们在Java Chassis源代码的demo/demo-edge中完整展示了如何实现Edge Service并验证它的能力：</p>
+<ol>
+  <li>edge-service微服务：Edge Service，包含AuthHandler；</li>
+  <li>authentication微服务：模拟认证微服务,处理AuthHandler的请求；</li>
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+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用confd和Nginx做边缘服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a>    <ul>
+      <li><a href="#confd" id="markdown-toc-confd"><strong>confd</strong></a></li>
+      <li><a href="#nginx" id="markdown-toc-nginx"><strong>Nginx</strong></a></li>
+    </ul>
+  </li>
+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#对接服务中心" id="markdown-toc-对接服务中心">对接服务中心</a>    <ul>
+      <li><a href="#方法一http调用" id="markdown-toc-方法一http调用"><strong>方法一：http调用</strong></a></li>
+      <li><a href="#方法二使用servicecomb开源代码接口" id="markdown-toc-方法二使用servicecomb开源代码接口"><strong>方法二：使用servicecomb开源代码接口</strong></a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<h3 id="confd"><strong>confd</strong></h3>
+
+<p>confd是一个轻量级的配置管理工具，源码地址：<a href="https://github.com/kelseyhightower/confd">https://github.com/kelseyhightower/confd</a>，它可以将配置信息存储在etcd、consul、dynamodb、redis以及zookeeper等。confd定期会从这些存储节点pull最新的配置，然后重新加载服务，完成配置文件的更新。</p>
+
+<h3 id="nginx"><strong>Nginx</strong></h3>
+
+<p>Nginx (engine x)是一个高性能的HTTP和反向代理服务器，具有负载均衡的功能。详情请参考<a href="http://www.nginx.cn/doc/">http://www.nginx.cn/doc/</a>。本小节介绍的服务主要使用到的是Nginx的http代理功能。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>本小节介绍的技术是使用nginx+confd做边缘服务，同时可以对接ServiceComb微服务框架中的服务中心，从服务中心中拉去服务信息通过confd动态更新nginx的配置。</p>
+
+<p>使用nginx+confd动态反向代理的实现步骤可参考文章<a href="http://www.cnblogs.com/Anker/p/6112022.html">http://www.cnblogs.com/Anker/p/6112022.html</a>，本节主要介绍confd如何对接ServiceComb框架的服务中心。</p>
+
+<h2 id="对接服务中心">对接服务中心</h2>
+
+<p>本节介绍的技术核心在于如何使得confd获取到服务中心的服务信息，服务中心开放了以下接口供外部调用：</p>
+
+<h3 id="方法一http调用"><strong>方法一：http调用</strong></h3>
+
+<p>服务中心开放http接口均需要添加租户头部信息：“X-Tenant-Name:tenantName”，tenameName为租户名，默认为default，例如”X-Tenant-Name:default”。</p>
+
+<ul>
+  <li>
+    <p>检查服务中心健康状态</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/health
+</span></code></pre></div>    </div>
+  </li>
+  <li>
+    <p>获取所有微服务信息</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/registry/v3/microservices
+</span></code></pre></div>    </div>
+  </li>
+  <li>
+    <p>获取指定id的微服务信息</p>
+  </li>
+</ul>
+
+<blockquote>
+  <ol>
+    <li>
+      <p>首先根据微服务信息获取serviceId</p>
+
+      <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err">GET 127.0.0.1:9980/registry/v3/existence?type=microservice&amp;appId={appId}&amp;serviceName={serviceName}&amp;version={version}
+</span></code></pre></div>      </div>
+    </li>
+    <li>
+      <p>根据上述接口返回的serviceId获取微服务完整信息</p>
+
+      <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err">GET 127.0.0.1:9980/registry/v3/microservices/{serviceId}
+</span></code></pre></div>      </div>
+    </li>
+  </ol>
+</blockquote>
+
+<ul>
+  <li>
+    <p>获取指定微服务的所有实例信息</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/registry/v3/microservices/{serviceId}/instances
+</span></code></pre></div>    </div>
+    <p>需要在header中添加：”X-ConsumerId:{serviceId}”。</p>
+  </li>
+  <li>
+    <p>查找微服务实例信息</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/registry/v3/instances?appId={appId}&amp;serviceName={serviceName}&amp;version={version}
+</span></code></pre></div>    </div>
+    <p>需要在header中添加”X-ConsumerId:{serviceId}”。</p>
+  </li>
+</ul>
+
+<p>注意：在实际开发中请访问实际的service-center访问地址，并将上述url中{}的变量替换成具体值，http返回的数据均为json格式</p>
+
+<h3 id="方法二使用servicecomb开源代码接口"><strong>方法二：使用servicecomb开源代码接口</strong></h3>
+
+<p>在开发微服务应用，只需要调用servicecomb框架代码中的工具类RegistryUtil.java中提供的接口，即可获取服务中心的信息，接口描述如下：</p>
+
+<ul>
+  <li>获取所有微服务信息
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">Microservice</span><span class="o">&gt;</span> <span class="nf">getAllMicroservices</span><span class="o">();</span>
+</code></pre></div>    </div>
+  </li>
+  <li>获取微服务唯一标识
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">String</span> <span class="nf">getMicroserviceId</span><span class="o">(</span><span class="nc">String</span> <span class="n">appId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">microserviceName</span><span class="o">,</span> <span class="nc">String</span> <span class="n">versionRule</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>根据微服务唯一标识查询微服务静态信息
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">Microservice</span> <span class="nf">getMicroservice</span><span class="o">(</span><span class="nc">String</span> <span class="n">microserviceId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>根据多个微服务唯一标识查询所有微服务实例信息
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">MicroserviceInstance</span><span class="o">&gt;</span> <span class="nf">getMicroserviceInstance</span><span class="o">(</span><span class="nc">String</span> <span class="n">consumerId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">providerId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>按照app+interface+version查询实例endpoints信息
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">MicroserviceInstance</span><span class="o">&gt;</span> <span class="nf">findServiceInstance</span><span class="o">(</span><span class="nc">String</span> <span class="n">consumerId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">appId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span><span class="nc">String</span> <span class="n">versionRule</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>通过上述http接口可获取到服务中心的微服务和其实例的信息，从而通过confd动态更新nginx配置。</p>
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+    <meta itemprop="headline" content="使用Zuul做边缘服务">
+    <meta itemprop="description" content="使用Zuul做边缘服务">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用Zuul做边缘服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a>    <ul>
+      <li><a href="#api-gateway" id="markdown-toc-api-gateway">API Gateway：</a></li>
+      <li><a href="#zuul" id="markdown-toc-zuul">Zuul</a></li>
+    </ul>
+  </li>
+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#注意事项" id="markdown-toc-注意事项">注意事项</a></li>
+  <li><a href="#启动zuul-proxy" id="markdown-toc-启动zuul-proxy">启动Zuul Proxy</a></li>
+  <li><a href="#使用zuul-proxy" id="markdown-toc-使用zuul-proxy">使用Zuul Proxy</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<h3 id="api-gateway">API Gateway：</h3>
+
+<p>API Gateway是一个服务器，也可以说是进入系统的唯一节点。API Gateway封装内部系统的架构，并且提供API给各个客户端。</p>
+
+<h3 id="zuul">Zuul</h3>
+
+<p>Zuul是Netflix的基于JVM的路由器和服务器端负载均衡器，可以使用Zuul进行以下操作：</p>
+
+<ul>
+  <li>认证</li>
+  <li>洞察</li>
+  <li>压力测试</li>
+  <li>金丝雀测试</li>
+  <li>动态路由</li>
+  <li>服务迁移</li>
+  <li>负载脱落</li>
+  <li>安全</li>
+  <li>静态相响应处理</li>
+  <li>主动/被动流量管理</li>
+</ul>
+
+<p>本小节主要介绍在SpringBoot应用中使用Zuul做API Gateway。关于Zuul的详细功能介绍请参考文档<a href="https://springcloud.cc/spring-cloud-dalston.html#_router_and_filter_zuul">路由器和过滤器：Zuul</a>。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>Zuul做API Gateway，即建立一个Zuul Proxy应用，在该Proxy应用中统一定义所有的微服务访问入口，通过使用不同的前缀(stripped)来区分各个微服务。本小节通过建立一个ZuulProxy SpringBoot应用来演示Zuul的API Gateway功能。</p>
+
+<h2 id="注意事项">注意事项</h2>
+
+<p>本小节介绍的ZuulProxy和ZuulServer等demo都是基于SpringBoot和ServiceComb框架的应用，具体请参考<a href="/cn/users/use-servicecomb-in-spring-boot/">在ServiceComb框架中集成SpringBoot框架</a>。</p>
+
+<h2 id="启动zuul-proxy">启动Zuul Proxy</h2>
+
+<p>本节介绍如何启动一个zuul proxy应用作为API Gateway。步骤如下：</p>
+
+<ul>
+  <li>
+    <p><strong>步骤 1</strong>在pom文件中添加依赖：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-zuul<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-ribbon<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-hystrix<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong>在SpringBoot主类添加注解：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@SpringBootApplication</span>
+ <span class="nd">@EnableServiceComb</span>
+ <span class="nd">@EnableZuulProxy</span><span class="c1">//新增注解</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">ZuulMain</span><span class="o">{</span>
+ <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span><span class="o">{</span>
+     <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ZuulMain</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong>在application.yml文件中定义路由策略：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">server</span><span class="pi">:</span>
+   <span class="na">port</span><span class="pi">:</span> <span class="m">8754</span> <span class="c1">#api gateway服务端口</span>
+ <span class="na">zuul</span><span class="pi">:</span>
+   <span class="na">routes</span><span class="pi">:</span> <span class="c1">#路由策略</span>
+     <span class="na">discoveryServer</span><span class="pi">:</span> <span class="s">/myServer/**</span> <span class="c1">#路由规则</span>
+</code></pre></div>    </div>
+
+    <p>上述的配置项可以根据实际开发环境进行配置。关于zuul.routers的路由策略的详细定义规则，请参考官方文献：<a href="https://springcloud.cc/spring-cloud-dalston.html#_router_and_filter_zuul">路由器和过滤器：Zuul</a>，可更细粒度地对路由进行控制。</p>
+  </li>
+  <li>
+    <p><strong>步骤 4</strong>在microservice.yaml定义微服务属性：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">discoverytest</span> <span class="c1">#服务ID</span>
+ <span class="na">service_description</span><span class="pi">:</span>
+   <span class="na">name</span><span class="pi">:</span> <span class="s">discoveryGateway</span> <span class="c1">#服务名称</span>
+   <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.2</span> <span class="c1">#服务版本号</span>
+ <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>  <span class="c1">#服务注册中心地址</span>
+   <span class="na">rest</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8082</span> <span class="c1">#微服务端口，可不写</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>本小节所有服务使用的都是本地的服务中心，具体的服务中心启动流程请参考<a href="/cn/users/setup-environment/#运行service-center">启动本地服务中心</a>。</p>
+
+<ul>
+  <li><strong>步骤 5　</strong>运行ZuulMain 应用</li>
+</ul>
+
+<h2 id="使用zuul-proxy">使用Zuul Proxy</h2>
+
+<p>在使用zuul做的API Gateway前，首先要启动在zuul.routers中定义的微服务提供者。</p>
+
+<p>开发服务提供者，开发流程请参考<a href="/cn/users/service-definition/">开发服务提供者</a>。在微服务microservice.yaml文件中需注意以下两点：</p>
+
+<ul>
+  <li>
+    <p>APPLICATION_ID需要于zuul proxy中定义的保持一致。</p>
+  </li>
+  <li>
+    <p>service_description.name需要于zuul.routers中相对应。</p>
+  </li>
+</ul>
+
+<p>示例如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">discoverytest</span> <span class="c1">#与zuul proxy一致</span>
+  <span class="na">service_description</span><span class="pi">:</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">discoveryServer</span> <span class="c1">#服务名称，与zuul.routers对应</span>
+    <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.2</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span> <span class="c1">#服务注册中心地址</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+
+<p>API Gateway的访问入口为：<a href="http://127.0.0.1:8754">http://127.0.0.1:8754</a>，所有在zuul.routers中定义的服务都可通过这个访问入口进行代理访问，访问规则如下：</p>
+
+<p>http://127.0.0.1:8754/myServer/***](http://127.0.0.1:8754/myServer/***)</p>
+
+<p>这表示，Http调用<a href="http://127.0.0.1:8754/myServer/***">http://127.0.0.1:8754/myServer/***</a>，会转到discoveryServer服务（例如：”/myServer/101”跳转到discoveryServer 服务下的”/101”）</p>
+
+<blockquote>
+  <p>如果在服务中心同时存在多个discoveryServer服务(版本不同),zuul默认采用Ribbon策略对请求进行转发。</p>
+</blockquote>
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+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#介绍" id="markdown-toc-介绍">介绍</a></li>
+  <li><a href="#如何使用" id="markdown-toc-如何使用">如何使用</a>    <ul>
+      <li><a href="#实现自定义healthcheck" id="markdown-toc-实现自定义healthcheck">实现自定义HealthCheck</a></li>
+      <li><a href="#验证实现的healthcheck" id="markdown-toc-验证实现的healthcheck">验证实现的HealthCheck</a></li>
+    </ul>
+  </li>
+  <li><a href="#参考示例" id="markdown-toc-参考示例">参考示例</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>微服务框架从1.0.0-m1版本开始支持健康检查。</p>
+
+<h2 id="介绍">介绍</h2>
+<p>微服务往往依赖诸多中间件例如数据库、消息队列等，也依赖其他微服务。当微服务不可用时，例如是由于数据库不可用引起的，我们需要通过日志系统或监控面板将不可用的详细原因记录下或展示出来：磁盘空间满报错？数据库访问用户名密码变更？数据库访问权限变化？而不仅仅是一个报错不可用的状态，这会对快速定位问题和解决故障大有裨益。</p>
+
+<p>健康检查（HealthCheck）提供了一套扩展机制，用户可以自定义检查点，探测微服务内部核心依赖是否可用，如果不可用，将详细信息暴露出来：</p>
+
+<p><img src="/assets/images/HealthCheck.png" alt="HealthCheck" /></p>
+
+<h2 id="如何使用">如何使用</h2>
+<h3 id="实现自定义healthcheck">实现自定义HealthCheck</h3>
+<p>Java Chassis HealthCheck使用起来非常简单，只需要继承<code class="highlighter-rouge">org.apache.servicecomb.foundation.metrics.health.HealthChecker</code>接口，并实现方法：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">方法名</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">getName</td>
+      <td style="text-align: left">返回此健康检查的名称，请确保名称不要重复，否则从发布获取数据的时候合并覆盖</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">check</td>
+      <td style="text-align: left">具体的检查逻辑实现</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>例如：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">MySqlHealthChecker</span> <span class="kd">implements</span> <span class="nc">HealthChecker</span> <span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getName</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="s">"mysql"</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">HealthCheckResult</span> <span class="nf">check</span><span class="o">()</span> <span class="o">{</span>
+    <span class="c1">//add your health check code here</span>
+    <span class="nc">Connection</span> <span class="n">connection</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span>
+    <span class="k">try</span> <span class="o">{</span>
+      <span class="n">connection</span> <span class="o">=</span> <span class="nc">DriverManager</span><span class="o">.</span><span class="na">getConnection</span><span class="o">(</span><span class="s">"jdbc:mysql://localhost:3306/test_db?useSSL=false"</span><span class="o">,</span> <span class="s">"root"</span><span class="o">,</span> <span class="s">"pwd"</span><span class="o">);</span>
+      <span class="k">return</span> <span class="k">new</span> <span class="nf">HealthCheckResult</span><span class="o">(</span><span class="kc">true</span><span class="o">,</span> <span class="s">"local mysql health check"</span><span class="o">,</span> <span class="s">""</span><span class="o">);</span>
+    <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">SQLException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span>
+      <span class="no">LOG</span><span class="o">.</span><span class="na">error</span><span class="o">(</span><span class="s">"Cannot connect the localhost mysql. "</span><span class="o">,</span> <span class="n">e</span><span class="o">);</span>
+      <span class="k">return</span> <span class="k">new</span> <span class="nf">HealthCheckResult</span><span class="o">(</span><span class="kc">false</span><span class="o">,</span> <span class="s">"local mysql health check"</span><span class="o">,</span> <span class="n">e</span><span class="o">.</span><span class="na">toString</span><span class="o">());</span>
+    <span class="o">}</span> <span class="k">finally</span> <span class="o">{</span>
+      <span class="k">if</span> <span class="o">(</span><span class="n">connection</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
+        <span class="k">try</span> <span class="o">{</span>
+          <span class="n">connection</span><span class="o">.</span><span class="na">close</span><span class="o">();</span>
+        <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">SQLException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span>
+          <span class="no">LOG</span><span class="o">.</span><span class="na">error</span><span class="o">(</span><span class="s">"Close connect the localhost mysql error. "</span><span class="o">,</span> <span class="n">e</span><span class="o">);</span>
+        <span class="o">}</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>然后使用SPI的方式加载它，具体为在<code class="highlighter-rouge">resource/META-INF/services</code>下创建<code class="highlighter-rouge">org.apache.servicecomb.foundation.metrics.health.HealthChecker</code>文件，然后写入实现的HealthCheck类名即可，例如：</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>org.apache.servicecomb.samples.metrics.extendhealthcheck.MySqlHealthChecker
+</code></pre></div></div>
+
+<h3 id="验证实现的healthcheck">验证实现的HealthCheck</h3>
+<p>启动微服务后，HealthCheck默认以Rest方式发布，发布地址与<code class="highlighter-rouge">servicecomb.rest.address</code>一致，如果在<code class="highlighter-rouge">microservice.yaml</code>中设置的配置为：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+
+<p>那么就可以通过访问http://localhost:8080/health 获取检查结果，以及访问http://localhost:8080/health/detail 获取所有的检查项结果明细。</p>
+
+<blockquote>
+  <p>说明：</p>
+  <ol>
+    <li>HealthCheck的默认Rest发布实现在metrics-core中，因此需要增加此依赖；</li>
+    <li>/health为所有HealthCheck的最终结果，true或false，只要有任何一个HealthCheck的healthy结果为false，那么就会是false。</li>
+  </ol>
+</blockquote>
+
+<h2 id="参考示例">参考示例</h2>
+<p>我们已经提供了一个例子作为参考，代码在samples/metrics-extend-healthcheck中。</p>
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+        
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+          
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+</aside>
+
+<h2 id="框架概述">框架概述</h2>
+<p><img src="/assets/images/servicecomb-models.png" alt="ServiceComb Model" class="align-center" /></p>
+
+<h2 id="主要设计意图">主要设计意图</h2>
+
+<p>1.编程模型和通信模型分离，不同的编程模型可以灵活组合不同的通信模型。应用开发者在开发阶段只关注接口开发，部署阶段灵活切换通信方式；支持legacy系统的切换，legacy系统只需要修改服务发布的配置文件（或者annotation），而不需要修改代码。</p>
+
+<p>现阶段支持SpringMVC、JAX-RS和透明RPC三种开发方式。</p>
+
+<p>2.内建API-first支持。通过契约规范化微服务开发，实现跨语言的通信，并支持配套的软件工具链（契约生成代码、代码生成契约等）开发，构建完整的开发生态。</p>
+
+<p>3.定义了常用的微服务运行模型，将微服务从发现到交互过程中的各种容错手段都封装起来。该运行模型支持自定义和扩展。</p>
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+      <th style="text-align: left">功能说明</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">编程模型</td>
+      <td style="text-align: left">provider-pojo</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">提供RPC开发模式</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">编程模型</td>
+      <td style="text-align: left">provider-jaxrs</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">提供JAX RS开发模式</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">编程模型</td>
+      <td style="text-align: left">provider-springmvc</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">提供Spring MVC开发模式</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">通信模型</td>
+      <td style="text-align: left">transport-rest-vertx</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">运行于HTTP之上的开发框架，不依赖WEB容器，应用打包为可执行jar</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">通信模型</td>
+      <td style="text-align: left">transport-rest-servlet</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">运行于WEB容器的开发框架，应用打包为war包</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">通信模型</td>
+      <td style="text-align: left">transport-highway</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">提供高性能的私有通信协议，仅用于java之间互通。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">运行模型</td>
+      <td style="text-align: left">handler-loadbalance</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">负载均衡模块。提供各种路由策略和配置方法。一般客户端使用。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">运行模型</td>
+      <td style="text-align: left">handler-bizkeeper</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">和服务治理相关的功能，比如隔离、熔断、容错。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">运行模型</td>
+      <td style="text-align: left">handler-tracing</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">调用链跟踪模块，对接监控系统，吐出打点数据。</td>
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+    </ul>
+  </li>
+  <li><a href="#限流策略" id="markdown-toc-限流策略">限流策略</a>    <ul>
+      <li><a href="#场景描述-2" id="markdown-toc-场景描述-2">场景描述</a></li>
+      <li><a href="#注意事项" id="markdown-toc-注意事项">注意事项</a></li>
+      <li><a href="#配置说明-2" id="markdown-toc-配置说明-2">配置说明</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="实例级故障隔离">实例级故障隔离</h2>
+
+<h3 id="场景描述">场景描述</h3>
+
+<p>实例级故障隔离功能允许在微服务的部分实例调用失败时，停止向故障实例发送请求，从而达到隔离故障实例的功能。</p>
+
+<h3 id="配置说明">配置说明</h3>
+
+<p>实例级故障隔离功能集成在负载均衡功能中，负载均衡策略的配置见<a href="/cn/users/service-configurations/#负载均衡策略">负载均衡策略</a>。负载均衡策略中，与实例级故障隔离相关的配置项见下表。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.enabled</td>
+      <td style="text-align: left">false</td>
+      <td style="text-align: left">Boolean</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否开启故障实例隔离功能</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.enableRequestThreshold</td>
+      <td style="text-align: left">20</td>
+      <td style="text-align: left">Integer</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">当实例的调用总次数达到该值时开始进入隔离逻辑门槛</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.errorThresholdPercentage</td>
+      <td style="text-align: left">20</td>
+      <td style="text-align: left">Integer，区间为(0,100]</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">实例故障隔离错误百分比</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.singleTestTime</td>
+      <td style="text-align: left">10000</td>
+      <td style="text-align: left">Integer</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">故障实例单点测试时间</td>
+      <td style="text-align: left"> </td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="熔断策略">熔断策略</h2>
+<h3 id="场景描述-1">场景描述</h3>
+
+<p>熔断策略是对ServiceComb熔断功能的设置，用户通过配置熔断策略可以指定在何种条件下ServiceComb框架将终止发送请求。</p>
+
+<h3 id="配置说明-1">配置说明</h3>
+
+<p>熔断作为异常反应机制是降级策略的一部分，相关概念还有隔离和容错。三者的关系以及配置方式参见<a href="/cn/users/service-configurations/#降级策略">降级策略</a>。</p>
+
+<h2 id="限流策略">限流策略</h2>
+<h3 id="场景描述-2">场景描述</h3>
+
+<p>用户在consumer端使用限流策略，可以限制发往指定微服务的请求的频率。</p>
+
+<h3 id="注意事项">注意事项</h3>
+
+<p>参考服务提供者处<a href="/cn/users/service-configurations/#限流策略">限流策略注意事项</a>。</p>
+
+<h3 id="配置说明-2">配置说明</h3>
+
+<p>限流策略配置在microservice.yaml文件中，相关配置项见下表。要开启服务消费者端的限流策略，还需要在处理链中配置消费端限流handler，配置示例如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-consumer</span>
+</code></pre></div></div>
+
+<p>QPS流控配置项说明</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Consumer.qps.enabled</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">Boolean</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否启用Consumer流控</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Consumer.qps.limit.[ServiceName].[Schema].[operation]</td>
+      <td style="text-align: left">2147483647  (max int)</td>
+      <td style="text-align: left">(0,2147483647]，整形</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">每秒钟允许的请求数</td>
+      <td style="text-align: left">支持microservice、schema、operation三个级别的配置</td>
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#启动本地服务中心" id="markdown-toc-启动本地服务中心">启动本地服务中心</a></li>
+  <li><a href="#mock机制启动服务中心" id="markdown-toc-mock机制启动服务中心">Mock机制启动服务中心</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>本小节介绍如何在开发者本地进行消费者/提供者应用的开发调试。开发服务提供者请参考<a href="/cn/users/service-definition/">开发服务提供者章节</a>，开发服务消费者请参考<a href="/cn/users/develop-with-rest-template/">开发服务消费者章节</a>。服务提供者和消费提供者均需要连接到在远程的服务中心，为了本地微服务的开发和调试，本小节介绍了两种搭建本地服务中心的方法进行本地微服务调试：</p>
+
+<ul>
+  <li>
+    <p><a href="#启动本地服务中心">启动本地服务中心</a>。</p>
+  </li>
+  <li>
+    <p><a href="#mock机制启动服务中心">通过local file模拟启动服务中心Mock机制</a>。</p>
+  </li>
+</ul>
+
+<p>服务中心是微服务框架中的重要组件，用于服务元数据以及服务实例元数据的管理和处理注册、发现。服务中心与微服务提供/消费者的逻辑关系下图所示：</p>
+
+<p><img src="/assets/images/local_develop_test.png" alt="" /></p>
+
+<h2 id="启动本地服务中心">启动本地服务中心</h2>
+
+<ul>
+  <li>
+    <p><strong>步骤1</strong> 启动本地服务中心，可参考<a href="/cn/users/setup-environment/#运行service-center">运行Service Center指南</a>。</p>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 启动本地轻量服务中心后，在服务提供/消费者的microservice.yaml文件中配置ServerCenter的地址和端口，示例代码：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span> <span class="c1">#服务中心地址及端口</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 开发服务提供/消费者，启动微服务进行本地测试。</p>
+  </li>
+</ul>
+
+<h2 id="mock机制启动服务中心">Mock机制启动服务中心</h2>
+
+<ul>
+  <li>
+    <p><strong>步骤 1</strong>新建本地服务中心定义文件registry.yaml，内容如下：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">springmvctest</span><span class="pi">:</span>
+   <span class="pi">-</span> <span class="na">id</span><span class="pi">:</span> <span class="s2">"</span><span class="s">001"</span>
+     <span class="na">version</span><span class="pi">:</span> <span class="s2">"</span><span class="s">1.0"</span>
+     <span class="na">appid</span><span class="pi">:</span> <span class="s">myapp</span> <span class="c1">#调试的服务id</span>
+     <span class="na">instances</span><span class="pi">:</span> 
+       <span class="na">endpoints</span><span class="pi">:</span>
+         <span class="s">rest://127.0.0.1:8080</span>
+</code></pre></div>    </div>
+
+    <p>注意：mock机制需要自己准备契约，并且当前只支持在本地进行服务消费端(consumer)侧的调试，不支持服务提供者(provider)</p>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong>在服务消费者Main函数首末添加如下代码：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">class</span> <span class="nc">xxxClient</span> <span class="o">{</span>
+ <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+   <span class="nc">System</span><span class="o">.</span><span class="na">setProperty</span><span class="o">(</span><span class="s">"local.registry.file"</span><span class="o">,</span> <span class="s">"/path/registry.yaml"</span><span class="o">);</span>
+   <span class="c1">//your code</span>
+   <span class="nc">System</span><span class="o">.</span><span class="na">clearProperty</span><span class="o">(</span><span class="s">"local.registry.file"</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>setProperty第二个参数填写registry.yaml的系统绝对路径，注意区分在不同系统下使用对应的路径分隔符。</p>
+
+<ul>
+  <li><strong>步骤 3</strong>开发服务消费者，启动微服务进行本地测试。</li>
+</ul>
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+<h2 id="概念阐述">概念阐述</h2>
+
+<p>在SpringCloud原生应用中，通过改变相关配置，让SpringCloud应用使用ServiceComb微服务框架中的Service Center和治理中心。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<ul>
+  <li>
+    <p>SpringCloud应用默认情况下由Spring Cloud Eureka提供在分布式环境下的服务发现和服务注册的功能。</p>
+
+    <p><img src="/assets/images/manage_springcloud_application_using_sc_and_gs.png" alt="" /></p>
+  </li>
+  <li>
+    <p>ServiceComb微服务框架中的Service Center用于服务元数据以及服务实例元数据的管理和处理注册、发现，同时还支持以下功能：</p>
+  </li>
+</ul>
+
+<blockquote>
+  <ul>
+    <li>
+      <p>支持pull/push两种模式监控实例变化</p>
+    </li>
+    <li>
+      <p>实例动态扩容，海量的长连接或者短连接</p>
+    </li>
+    <li>
+      <p>支持灰度发布、服务分组等高级管理特性</p>
+    </li>
+  </ul>
+</blockquote>
+
+<p>使用SpringBoot/Cloud开发应用，并让服务运行于ServiceComb微服务SDK容器中，使用其高性能通信、服务治理、分布式事务管理等功能。</p>
+
+<h3 id="配置说明">配置说明</h3>
+
+<p>使用SpringBoot/Cloud开发应用，在原有应用的基础上按照以下步骤进行操作，即可对接ServiceComb的SDK各组件：</p>
+
+<p>注意： 如果使用Java Chassis 0.5.0 以及以前的版本的，请使用io.servicecomb 作为依赖的groupId。</p>
+
+<ul>
+  <li>
+    <p><strong>步骤 1</strong> 在pom中添加依赖管理dependencyManagement：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+ <span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 在pom中添加依赖：</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span>
+   <span class="c">&lt;!--让服务运行于微服务sdk容器中--&gt;</span>
+   <span class="nt">&lt;group&gt;</span>org.apache.servicecomb<span class="nt">&lt;/group&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span>
+   <span class="c">&lt;!--使用服务中心--&gt;</span>
+   <span class="nt">&lt;group&gt;</span>org.apache.servicecomb<span class="nt">&lt;/group&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span>
+   <span class="c">&lt;!--让服务运行于Spring boot embedded tomcat中--&gt;</span>
+   <span class="nt">&lt;group&gt;</span>org.apache.servicecomb<span class="nt">&lt;/group&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-transport<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-web<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-actuator<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 配置处理链和协议：</p>
+
+    <p>在resources目录下新建microservice.yaml文件，对服务进行定义，详细定义规则请参考<a href="/cn/users/service-definition/">服务定义章节</a>，示例如下：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">discoverytest</span>
+ <span class="na">service_description</span><span class="pi">:</span>
+   <span class="na">name</span><span class="pi">:</span> <span class="s">discoveryServer</span>
+   <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.2</span>
+ <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span>  <span class="s">http://127.0.0.1:30100</span> <span class="c1">#服务注册中心地址</span>
+   <span class="err"> </span><span class="na">rest</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span> <span class="c1">#服务发布的端口</span>
+    <span class="na">handler</span><span class="pi">:</span>
+      <span class="na">chain</span><span class="pi">:</span>
+        <span class="na">Provider</span><span class="pi">:</span>
+          <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span> <span class="c1">#调用的处理链</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤4</strong> 若要使用ServiceComb的服务中心：</p>
+
+    <p>在pom中添加依赖：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o">&lt;</span><span class="n">dependency</span><span class="o">&gt;</span>
+   <span class="o">&lt;!--</span><span class="err">使用服务中心</span><span class="o">--&gt;</span>
+   <span class="o">&lt;</span><span class="n">group</span><span class="o">&gt;</span><span class="n">org</span><span class="o">.</span><span class="na">apache</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">&lt;/</span><span class="n">group</span><span class="o">&gt;</span>
+   <span class="o">&lt;</span><span class="n">artifactId</span><span class="o">&gt;</span><span class="n">spring</span><span class="o">-</span><span class="n">boot</span><span class="o">-</span><span class="n">starter</span><span class="o">-</span><span class="n">discovery</span><span class="o">&lt;/</span><span class="n">artifactId</span><span class="o">&gt;</span>
+ <span class="o">&lt;/</span><span class="n">dependency</span><span class="o">&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 5</strong> 在启动类添加注解@EnableServiceComb：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@EnableDiscoveryClient</span>
+ <span class="nd">@SpringBootApplication</span>
+ <span class="nd">@EnableServiceComb</span> <span class="c1">//新增注解</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">xxxServer</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+     <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="n">xxxServer</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 6</strong> 定义服务契约，具体请参考<a href="/cn/users/service-contract/">服务契约</a>，示例如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="c1">// ControllerImpl.class:</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"test"</span><span class="o">)</span>
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/compute"</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="nc">MediaType</span><span class="o">.</span><span class="na">TEXT_PLAIN</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">ControllerImpl</span> <span class="o">{</span>
+   <span class="nd">@ResponseBody</span>
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/hello/{name}"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">add</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"hello"</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤 7</strong> 启动xxxServer，该服务便可注册到ServiceComb的Service Center。</p>
+  </li>
+</ul>
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+    
+    <meta itemprop="dateModified" content="December 29, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">0.5.0版本中的监控
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#背景" id="markdown-toc-背景">背景</a></li>
+  <li><a href="#原理" id="markdown-toc-原理">原理</a></li>
+  <li><a href="#如何配置" id="markdown-toc-如何配置">如何配置</a></li>
+  <li><a href="#注意事项" id="markdown-toc-注意事项">注意事项</a></li>
+  <li><a href="#配置示例" id="markdown-toc-配置示例">配置示例</a></li>
+  <li><a href="#输出效果" id="markdown-toc-输出效果">输出效果</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>微服务框架从0.5.0版本开始支持监控功能Metrics，请注意这个功能还处于开发（Preview）阶段，并且我们未来会做较大的调整，更多讨论请订阅ServiceComb邮件列表(dev-subscribe@servicecomb.apache.org)。</p>
+
+<h2 id="背景">背景</h2>
+<p>将系统微服务化是技术潮流和趋势，但是它解决了很多问题的同时也带来了新的问题。</p>
+
+<p><img src="/assets/images/MonolithicArch.png" alt="MonolithicArch" /></p>
+
+<p>这是传统单体系统架构图，对运维人员友好，但是对开发人员不友好，系统维护升级困难。</p>
+
+<p><img src="/assets/images/MicroserviceArch.png" alt="MicroserviceArch" /></p>
+
+<p>这是微服务化后的系统架构图，经过功能切分，开发人员得到解脱，拥有了极致的CI/CD，但是运维人员却需要维护海量的微服务实例，所以如果不进行性能监控，就无法定位时延高的微服务，也无法制定弹性伸缩策略。</p>
+
+<h2 id="原理">原理</h2>
+<p>0.5.0版本的Metrics会在Java Chassis的Invocation中埋入计数器，也会使用Hystrix收集TPS和Latency，同时收集微服务实例的CPU使用率和内存使用量，最终通过输出日志的方式输出收集到的Metrics数据。<br />
+输入日志使用的是SLF4J作为日志框架，未与任何具体的日志框架绑定，我们会通过定向Logger名输出的方式将不同的Metrics输出为一个个独立的文件，因此需要在你的日志配置中添加对应的配置项，<a href="https://stackoverflow.com/questions/9652032/how-can-i-create-2-separate-log-files-with-one-log4j-config-file">这篇文章</a>详细说明了如果使用Log4j作为日志实现如何配置，而<a href="https://stackoverflow.com/questions/36643692/log4j2-multiple-appenders-the-same-output-is-written-to-multiple-files">这篇文章</a>则详细介绍了如果使用Log4j2作为日志需要如何配置。<br />
+Logger名指的是LoggerFactory.getLogger后的第一个参数：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">log</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="s">"${Logger名}"</span><span class="o">);</span>
+<span class="n">log</span><span class="o">.</span><span class="na">trace</span><span class="o">(</span><span class="s">"${Metric数据}"</span><span class="o">);</span>
+</code></pre></div></div>
+<p><strong>为不影响调试，log的输出级别为trace</strong></p>
+
+<p>以下是我们的定向Logger名以及输出的Metrics含义：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Logger名</th>
+      <th style="text-align: left">Metric含义</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">averageServiceExecutionTime</td>
+      <td style="text-align: left">Producer端调用平均执行时间</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">averageTimeInQueue</td>
+      <td style="text-align: left">Producer端调用在队列中的平均时间</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">countInQueue</td>
+      <td style="text-align: left">Producer端在队列中等待的调用的数量</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">cpuLoad</td>
+      <td style="text-align: left">实例CPU使用率</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">cpuRunningThreads</td>
+      <td style="text-align: left">实例运行线程数量</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">heapCommit，heapInit，heapMax，heapUsed</td>
+      <td style="text-align: left">内存Heap使用状况</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">nonHeapCommit，nonHeapInit，nonHeapMax，nonHeapUsed</td>
+      <td style="text-align: left">内存NonHeap使用状况</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">latency</td>
+      <td style="text-align: left">调用平均时延</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">tps</td>
+      <td style="text-align: left">每秒调用数（Transaction per seconds）</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">maxLifeTimeInQueue</td>
+      <td style="text-align: left">Producer端调用在队列中最大等待时间</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">minLifeTimeInQueue</td>
+      <td style="text-align: left">Producer端调用在队列中最小等待时间</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">totalRequestsPerProvider</td>
+      <td style="text-align: left">Producer总请求数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">totalRequestsPerConsumer</td>
+      <td style="text-align: left">Consumer总请求数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">totalFailedRequestsPerProvider</td>
+      <td style="text-align: left">Producer失败总请求数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">totalFailRequestsPerConsumer</td>
+      <td style="text-align: left">Consumer失败总请求数</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="如何配置">如何配置</h2>
+<p>请在microservice.yaml中添加如下配置项：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">metrics</span><span class="pi">:</span>
+    <span class="c1">#metrics数据采集时间（同样是写文件间隔），单位秒</span>
+    <span class="na">polltime</span><span class="pi">:</span> <span class="m">5</span>
+    <span class="c1">#如果metric是浮点数，输出结果保留几位小数，默认为1</span>
+    <span class="na">round_places</span><span class="pi">:</span> <span class="m">1</span>
+    <span class="na">file</span><span class="pi">:</span>
+      <span class="c1">#是否启用文件输出</span>
+      <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+      <span class="c1">#会体现为输出内容中的plugin_id</span>
+      <span class="na">name_prefix</span><span class="pi">:</span> <span class="s">bmi.calculator</span>
+</code></pre></div></div>
+
+<h2 id="注意事项">注意事项</h2>
+<p><strong>需要在provider治理链中添加bizkeeper-provider，否则TPS和Latency无数据</strong></p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+ <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+ <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+ <span class="na">handler</span><span class="pi">:</span>
+   <span class="na">chain</span><span class="pi">:</span>
+     <span class="na">Provider</span><span class="pi">:</span>
+       <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+</code></pre></div></div>
+
+<h2 id="配置示例">配置示例</h2>
+
+<p>以设置averageServiceExecutionTime为例，如果是Log4j，配置如下：</p>
+<div class="language-properties highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#指定Logger名为averageServiceExecutionTime
+</span><span class="py">log4j.category.averageServiceExecutionTime</span><span class="p">=</span><span class="s">TRACE, averageServiceExecutionTimeLogger</span>
+<span class="c">#定向日志，不扩散到别的Logger中
+</span><span class="py">log4j.additivity.averageServiceExecutionTime</span><span class="p">=</span><span class="s">false</span>
+<span class="c">#使用RollingFileAppender
+</span><span class="py">log4j.appender.averageServiceExecutionTimeLogger</span><span class="p">=</span><span class="s">org.apache.log4j.RollingFileAppender</span>
+<span class="py">log4j.appender.averageServiceExecutionTimeLogger.File</span><span class="p">=</span><span class="s">/target/averageServiceExecutionTime.log</span>
+<span class="py">log4j.appender.averageServiceExecutionTimeLogger.MaxFileSize</span><span class="p">=</span><span class="s">10MB</span>
+<span class="py">log4j.appender.averageServiceExecutionTimeLogger.MaxBackupIndex</span><span class="p">=</span><span class="s">10</span>
+<span class="py">log4j.appender.averageServiceExecutionTimeLogger.layout</span><span class="p">=</span><span class="s">org.apache.log4j.PatternLayout</span>
+<span class="py">log4j.appender.averageServiceExecutionTimeLogger.layout.ConversionPattern</span><span class="p">=</span><span class="s">%m%n</span>
+<span class="py">log4j.appender.averageServiceExecutionTimeLogger.append</span><span class="p">=</span><span class="s">true</span>
+</code></pre></div></div>
+
+<p>如果是Log4j2，配置如下：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">&lt;!--Log4j2配置支持全局配置--&gt;</span>
+<span class="nt">&lt;Properties&gt;</span>
+  <span class="nt">&lt;Property</span> <span class="na">name=</span><span class="s">"maxFileSize"</span><span class="nt">&gt;</span>10MB<span class="nt">&lt;/Property&gt;</span>
+  <span class="nt">&lt;Property</span> <span class="na">name=</span><span class="s">"maxFileCount"</span><span class="nt">&gt;</span>10<span class="nt">&lt;/Property&gt;</span>
+  <span class="nt">&lt;Property</span> <span class="na">name=</span><span class="s">"filePath"</span><span class="nt">&gt;</span>/target<span class="nt">&lt;/Property&gt;</span>
+  <span class="nt">&lt;Property</span> <span class="na">name=</span><span class="s">"filePrefix"</span><span class="nt">&gt;</span>bmi.calculator<span class="nt">&lt;/Property&gt;</span>
+<span class="nt">&lt;/Properties&gt;</span>
+
+<span class="nt">&lt;Appenders&gt;</span>
+  <span class="nt">&lt;RollingFile</span> <span class="na">name=</span><span class="s">"averageServiceExecutionTime"</span> <span class="na">fileName=</span><span class="s">"${filePath}${filePrefix}.averageServiceExecutionTime.dat"</span>
+    <span class="na">filePattern=</span><span class="s">"${filePath}${filePrefix}.averageServiceExecutionTime-%i.dat"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"%m%n"</span><span class="nt">/&gt;</span>
+    <span class="nt">&lt;SizeBasedTriggeringPolicy</span> <span class="na">size=</span><span class="s">"${maxFileSize}"</span><span class="nt">/&gt;</span>
+    <span class="nt">&lt;DefaultRolloverStrategy</span> <span class="na">max=</span><span class="s">"${maxFileCount}"</span><span class="nt">/&gt;</span>
+  <span class="nt">&lt;/RollingFile&gt;</span>
+<span class="nt">&lt;/Appenders&gt;</span>
+
+<span class="nt">&lt;Loggers&gt;</span>
+  <span class="nt">&lt;Logger</span> <span class="na">name=</span><span class="s">"averageServiceExecutionTime"</span> <span class="na">level=</span><span class="s">"trace"</span> <span class="na">additivity=</span><span class="s">"false"</span><span class="nt">&gt;</span>
+    <span class="nt">&lt;AppenderRef</span> <span class="na">ref=</span><span class="s">"averageServiceExecutionTime"</span><span class="nt">/&gt;</span>
+  <span class="nt">&lt;/Logger&gt;</span>
+<span class="nt">&lt;/Loggers&gt;</span>
+</code></pre></div></div>
+
+<p>剩余Metric（参见原理章节中的表格）按照上面的例子重复替换即可。</p>
+
+<h2 id="输出效果">输出效果</h2>
+<p>每一个文件就是一个微服务示例级别的metrics数据输出，0.5.0版本还不支持Operation级别的Metrics输出：</p>
+
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+    <meta itemprop="headline" content="1.0.0-m1版本中的监控">
+    <meta itemprop="description" content="1.0.0-m1版本中的监控">
+    
+    <meta itemprop="dateModified" content="December 30, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">1.0.0-m1版本中的监控
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#背景" id="markdown-toc-背景">背景</a></li>
+  <li><a href="#1000-m1版本原理" id="markdown-toc-1000-m1版本原理">1.0.00-m1版本原理</a>    <ul>
+      <li><a href="#数据采集不再依赖hystrixhandler-bizkeeper使用事件埋点收集与调用相关的所有数据" id="markdown-toc-数据采集不再依赖hystrixhandler-bizkeeper使用事件埋点收集与调用相关的所有数据">数据采集不再依赖Hystrix（handler-bizkeeper），使用事件埋点收集与调用相关的所有数据</a></li>
+      <li><a href="#使用netflix-servo作为metric的计数器" id="markdown-toc-使用netflix-servo作为metric的计数器">使用Netflix Servo作为Metric的计数器</a></li>
+      <li><a href="#周期设置" id="markdown-toc-周期设置">周期设置</a></li>
+    </ul>
+  </li>
+  <li><a href="#metrics数据id格式" id="markdown-toc-metrics数据id格式">Metrics数据ID格式</a>    <ul>
+      <li><a href="#jvm信息" id="markdown-toc-jvm信息">JVM信息</a></li>
+      <li><a href="#invocation信息" id="markdown-toc-invocation信息">Invocation信息</a></li>
+    </ul>
+  </li>
+  <li><a href="#如何配置" id="markdown-toc-如何配置">如何配置</a>    <ul>
+      <li><a href="#全局配置" id="markdown-toc-全局配置">全局配置</a></li>
+      <li><a href="#依赖配置" id="markdown-toc-依赖配置">依赖配置</a></li>
+    </ul>
+  </li>
+  <li><a href="#如何获取数据" id="markdown-toc-如何获取数据">如何获取数据</a>    <ul>
+      <li><a href="#通过发布接口获取" id="markdown-toc-通过发布接口获取">通过发布接口获取</a></li>
+      <li><a href="#直接获取" id="markdown-toc-直接获取">直接获取</a></li>
+    </ul>
+  </li>
+  <li><a href="#如何使用数据" id="markdown-toc-如何使用数据">如何使用数据</a></li>
+  <li><a href="#如何扩展" id="markdown-toc-如何扩展">如何扩展</a></li>
+  <li><a href="#参考示例" id="markdown-toc-参考示例">参考示例</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>微服务框架从0.5.0版本开始支持监控功能Metrics，1.0.0-m1版本正式发布，请通过查看用户手册和<a href="https://github.com/apache/servicecomb-java-chassis/releases">Release Note</a>获取更多信息，我们也会继续追加新特性新功能，欢迎订阅ServiceComb邮件列表(dev-subscribe@servicecomb.apache.org)参与讨论。</p>
+
+<h2 id="背景">背景</h2>
+<p>将系统微服务化是技术潮流和趋势，但是它解决了很多问题的同时也带来了新的问题。</p>
+
+<p><img src="/assets/images/MonolithicArch.png" alt="MonolithicArch" /></p>
+
+<p>这是传统单体系统架构图，对运维人员友好，但是对开发人员不友好，系统维护升级困难。</p>
+
+<p><img src="/assets/images/MicroserviceArch.png" alt="MicroserviceArch" /></p>
+
+<p>这是微服务化后的系统架构图，经过功能切分，开发人员获得了架构独立、快速迭代等诸多微服务带来的好处，但是运维人员却需要维护海量的微服务实例，所以如果不进行性能监控，当系统出现故障或用户体验下降时，就无法快速定位问题，也无法制定策略（例如弹性伸缩）来预防。</p>
+
+<h2 id="1000-m1版本原理">1.0.00-m1版本原理</h2>
+<p>在0.5.0版本的实现介绍<a href="/cn/users/metrics-in-0.5.0/">0.5.0版本中的监控</a>中，存在一些问题：</p>
+<ol>
+  <li>metrics在foundation-metrics模块中实现，并且包含了一些具体的定制代码；</li>
+  <li>使用ThreadLocal变量收集和汇总数据，虽然性能很高，但是存在内存泄漏的风险；</li>
+  <li>Metrics的输出为固定的文本，而不是独立的数值，数据使用起来很不方便；</li>
+  <li>没有提供通用数据发布接口，难以和更多的第三方监控系统做集成；</li>
+  <li>由于foundation-metrics模块过于底层，用户无法以可选的方式决定是否启用；</li>
+</ol>
+
+<p>因此，从0.5.0版本升级到1.0.0-m1版本，我们进行了一次全面的重构，重构后的Metrics将分为如下两个个模块</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Module名</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">foundation-metrics</td>
+      <td style="text-align: left">Metrics机制层模块，提供Metrics基础能力</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">metrics-core</td>
+      <td style="text-align: left">Metrics核心模块，引入后即启用Metrics数据收集功能</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">metrics-integration</td>
+      <td style="text-align: left">包含Metrics与其它三方系统集成</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>它们的依赖关系如下图所示：</p>
+
+<p><img src="/assets/images/MetricsDependency.png" alt="MetricsDependency.png" /></p>
+
+<h3 id="数据采集不再依赖hystrixhandler-bizkeeper使用事件埋点收集与调用相关的所有数据">数据采集不再依赖Hystrix（handler-bizkeeper），使用事件埋点收集与调用相关的所有数据</h3>
+<p>1.0.0-m1版本不再从Hystrix获取调用的TPS和Latency，避免了不配置Java Chassis Bizkeeper Handler就不会输出这两项数据的问题；使用foundation-common中的EventBus作为事件总线，EventBus初始化的时候会通过SPI（Service Provider Interface）的机制将所有的EventListener注册进来，已实现的EventListener包括：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">事件监听处理类名</th>
+      <th style="text-align: left">功能</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">InvocationStartedEventListener</td>
+      <td style="text-align: left">处理Consumer调用或Producer接收开始时触发的InvocationStartedEvent</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">InvocationStartExecutionEventListener</td>
+      <td style="text-align: left">处理Producer从队列中取出调用开始处理时触发的InvocationStartExecutionEvent</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">InvocationFinishedEventListener</td>
+      <td style="text-align: left">处理Consumer调用返回或Producer处理完毕触发的InvocationFinishedEvent</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><em>特别说明，Java Chassis的Reactor框架基于<a href="http://vertx.io/">Vertx</a>，在同步调用模式下，微服务Producer端收到Invocation后，并不会马上同步处理请求，而是将它放入一个处理队列中，Invocation在队列中的时间称为<strong>LifeTimeInQueue</strong>，队列的长度称为<strong>waitInQueue</strong>，这是衡量微服务压力的两个重要指标，可以参考操作系统磁盘读写队列的概念；Consumer端并不会有队列，因此永远不会触发InvocationStartExecutionEvent。</em></p>
+
+<p>事件触发的代码分布在Java Chassis的RestInvocation、HighwayServerInvoke和InvokerUtils中，如果微服务没有启用Metrics，EventBus中就不会注册Metrics事件监听处理器，因此对性能的影响微乎其微。</p>
+
+<h3 id="使用netflix-servo作为metric的计数器">使用Netflix Servo作为Metric的计数器</h3>
+<p><a href="https://github.com/Netflix/servo">Netflix Servo</a>具有性能极高的计数器（Monitor），我们使用了五种：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Monitor名</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">BasicCounter</td>
+      <td style="text-align: left">基本累加计数器（永续累加）</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">StepCounter</td>
+      <td style="text-align: left">周期累加计数器（以前曾经称为ResettableCounter）</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">BasicTimer</td>
+      <td style="text-align: left">时间计数器</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">BasicGauge</td>
+      <td style="text-align: left">基本计量器</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">MaxGauge</td>
+      <td style="text-align: left">周期最大值计数器</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><em>依赖的Servo版本为0.10.1</em></p>
+
+<h3 id="周期设置">周期设置</h3>
+<p>Metrics有很多种分类方式，在技术实现上我们偏向以取值方式区分为两种：</p>
+<ol>
+  <li>直接取值
+  任何时候都能够立刻获取到最新值，例如资源使用率，包括CPU使用率，线程数，Heap使用数据等等，还有调用累加次数，当前队列长度等等。</li>
+  <li>统计取值
+  经过一个特定的时间周期才能够统计出值，这个时间间隔我们可以称为窗口周期（Window Time）或统计周期，例如：<br />
+  a) 多值取其一的，比如Max、Min、Median（中位值）;  <br />
+  b) 与时间相关的，比如TPS（transaction per second）；  <br />
+  c) 与个数相关的，比如累加平均值、方差等等；  <br />
+  获取此类Metrics的值，返回的是上一个周期的统计结果，具有一定的延后性。在Servo中，这个时间被称为<a href="https://github.com/Netflix/servo/wiki/Getting-Started">“Polling Intervals”</a>。  <br />
+  从1.0.0-m1开始，可以通过microservice.yaml中的servicecomb.metrics.window_time配置设置周期，效果与servo.pollers一致。</li>
+</ol>
+
+<p><strong>提示：Servo已经被Netflix标记为DEPRECATED，我们将在1.0.0-m2中使用Netflix spectator替换，将不需要设置周期</strong></p>
+
+<h2 id="metrics数据id格式">Metrics数据ID格式</h2>
+<p>Java Chassis Metrics内置两种类型的Metric输出：</p>
+<h3 id="jvm信息">JVM信息</h3>
+<p>输出ID格式为：<em>jvm(statistic=gauge,name={name})</em>
+name包括：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">name</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">cpuLoad</td>
+      <td style="text-align: left">CPU使用率</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">cpuRunningThreads</td>
+      <td style="text-align: left">线程数</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">heapInit,heapMax,heapCommit,heapUsed</td>
+      <td style="text-align: left">内存heap使用情况</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">nonHeapInit,nonHeapMax,nonHeapCommit,nonHeapUsed</td>
+      <td style="text-align: left">内存nonHeap使用情况</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="invocation信息">Invocation信息</h3>
+<p>输出ID格式为：<em>servicecomb.invocation(operation={operationName},role={role},stage={stage},statistic={statistic},status={status},unit={unit})</em>
+标签含义及值如下：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Tag名</th>
+      <th style="text-align: left">描述</th>
+      <th style="text-align: left">值</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">operationName</td>
+      <td style="text-align: left">Operation全名</td>
+      <td style="text-align: left">MicroserviceQualifiedName</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">role</td>
+      <td style="text-align: left">Consumer端统计还是Producer端统计</td>
+      <td style="text-align: left">consume,producer</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">stage</td>
+      <td style="text-align: left">统计的阶段</td>
+      <td style="text-align: left">queue（在队列中，仅producer）,execution（执行阶段，仅producer）,total（整体）</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">statistic</td>
+      <td style="text-align: left">统计项</td>
+      <td style="text-align: left">tps,count（总调用次数）,max,waitInQueue（在队列中等待数，仅producer）,latency</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">status</td>
+      <td style="text-align: left">调用结果状态值</td>
+      <td style="text-align: left">200, 404等等</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">unit</td>
+      <td style="text-align: left">如果是时延统计，单位</td>
+      <td style="text-align: left">MILLISECONDS，SECONDS等等</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="如何配置">如何配置</h2>
+<h3 id="全局配置">全局配置</h3>
+<p>请在microservice.yaml中添加如下配置项：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">metrics</span><span class="pi">:</span>
+    <span class="c1">#时间窗间隔，单位毫秒,默认为5000（5秒）</span>
+    <span class="na">window_time</span><span class="pi">:</span> <span class="m">5000</span>
+</code></pre></div></div>
+
+<p><strong>为了降低Metrics理解和使用难度，我们暂时不支持多周期</strong></p>
+
+<h3 id="依赖配置">依赖配置</h3>
+<p>只需要添加metrics-core依赖即可：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>metrics-core<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h2 id="如何获取数据">如何获取数据</h2>
+<p>配置好Metrics后，你可以通过如下两种方式获取Metrics数据：</p>
+<h3 id="通过发布接口获取">通过发布接口获取</h3>
+<p>当微服务启动后，metrics-core会自动以Springmvc的方式发布服务：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"metricsEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/metrics"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">MetricsPublisher</span> <span class="o">{</span>
+  <span class="nd">@ApiResponses</span><span class="o">({</span>
+      <span class="nd">@ApiResponse</span><span class="o">(</span><span class="n">code</span> <span class="o">=</span> <span class="mi">400</span><span class="o">,</span> <span class="n">response</span> <span class="o">=</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">message</span> <span class="o">=</span> <span class="s">"illegal request content"</span><span class="o">),</span>
+  <span class="o">})</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+  <span class="nd">@CrossOrigin</span>
+  <span class="kd">public</span> <span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">Double</span><span class="o">&gt;</span> <span class="nf">measure</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">measure</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+<p>因此，如果你在microservice.yaml中配置了rest provider，例如：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+<p>你就可以通过http://localhost:8080/metrics 直接获取到数据，打开浏览器输入此URL就可以看到返回结果。</p>
+
+<h3 id="直接获取">直接获取</h3>
+<p>从上面的代码可以看到，数据提供的入口是org.apache.servicecomb.metrics.core.MonitorManager，因此如果你希望自己开发数据发布程序，只需要获取它即可。</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">MonitorManager</span> <span class="n">manager</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">();</span>
+<span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">Double</span><span class="o">&gt;</span> <span class="n">metrics</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">measure</span><span class="o">();</span>
+</code></pre></div></div>
+
+<p><strong>提示：Servo已经被Netflix标记为DEPRECATED，我们将在1.0.0-m2中使用Netflix spectator替换，获取数据的接口会有调整</strong></p>
+
+<h2 id="如何使用数据">如何使用数据</h2>
+<p>Metrics数据将以Map&lt;String, Double&gt;的形式输出，为了能够方便用户获取指定Metric的值，提供了org.apache.servicecomb.foundation.metrics.publish.MetricsLoader工具类：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="c1">//模拟MonitorManager.getInstance().measure()获取所有的Metrics值</span>
+    <span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">Double</span><span class="o">&gt;</span> <span class="n">metrics</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HashMap</span><span class="o">&lt;&gt;();</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=1,K2=2,K3=3)"</span><span class="o">,</span> <span class="mf">100.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=1,K2=20,K3=30)"</span><span class="o">,</span> <span class="mf">200.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=2,K2=200,K3=300)"</span><span class="o">,</span> <span class="mf">300.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=2,K2=2000,K3=3000)"</span><span class="o">,</span> <span class="mf">400.0</span><span class="o">);</span>
+
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=1,K2=2,K3=3)"</span><span class="o">,</span> <span class="mf">500.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=10,K2=20,K3=30)"</span><span class="o">,</span> <span class="mf">600.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=100,K2=200,K3=300)"</span><span class="o">,</span> <span class="mf">700.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=1000,K2=2000,K3=3000)"</span><span class="o">,</span> <span class="mf">800.0</span><span class="o">);</span>
+
+    <span class="c1">//创建一个MetricsLoader加载所有的Metrics值</span>
+    <span class="nc">MetricsLoader</span> <span class="n">loader</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">MetricsLoader</span><span class="o">(</span><span class="n">metrics</span><span class="o">);</span>
+
+    <span class="c1">//获取name为X的所有Metrics并且按K1,K2两个Tag层次分组</span>
+    <span class="nc">MetricNode</span> <span class="n">node</span> <span class="o">=</span> <span class="n">loader</span><span class="o">.</span><span class="na">getMetricTree</span><span class="o">(</span><span class="s">"X"</span><span class="o">,</span><span class="s">"K1"</span><span class="o">,</span><span class="s">"K2"</span><span class="o">);</span>
+
+    <span class="c1">//获取K1=1且K2=20的所有Metrics，因为node是按K1和K2的层次分组的</span>
+    <span class="n">node</span><span class="o">.</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"1"</span><span class="o">).</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"20"</span><span class="o">).</span><span class="na">getMetrics</span><span class="o">();</span>
+
+    <span class="c1">//从层次结构中通过Tag匹配获取Metric的值</span>
+    <span class="n">node</span><span class="o">.</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"1"</span><span class="o">).</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"20"</span><span class="o">).</span><span class="na">getFirstMatchMetricValue</span><span class="o">(</span><span class="s">"K3"</span><span class="o">,</span><span class="s">"30"</span><span class="o">);</span>
+</code></pre></div></div>
+<p><em>demo/perf/PerfMetricsFilePublisher.java提供了MetricsLoader更详细的使用示例</em></p>
+
+<h2 id="如何扩展">如何扩展</h2>
+<p>Java Chassis Metrics支持自定义Metrics扩展，MonitorManager包含一组获取各类Monitor的方法：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">方法名</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">getCounter</td>
+      <td style="text-align: left">获取一个计数器类的Monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">getMaxGauge</td>
+      <td style="text-align: left">获取一个最大值统计Monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">getGauge</td>
+      <td style="text-align: left">获取基本计量Monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">getTimer</td>
+      <td style="text-align: left">获取一个时间计数器类的Monitor</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>以处理订单这个场景为例：</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">OrderController</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Counter</span> <span class="n">orderCount</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Counter</span> <span class="n">orderTps</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Timer</span> <span class="n">averageLatency</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">MaxGauge</span> <span class="n">maxLatency</span><span class="o">;</span>
+
+  <span class="nc">OrderController</span><span class="o">()</span> <span class="o">{</span>
+    <span class="nc">MonitorManager</span> <span class="n">manager</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">();</span>
+    <span class="c1">//"商品名","levis jeans"与"型号","512" 是两个自定义Tag的name和value，支持定义多Tag</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderCount</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getCounter</span><span class="o">(</span><span class="s">"订单数量"</span><span class="o">,</span> <span class="s">"商品名"</span><span class="o">,</span> <span class="s">"levis jeans"</span><span class="o">,</span> <span class="s">"型号"</span><span class="o">,</span> <span class="s">"512"</span><span class="o">);</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderTps</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getCounter</span><span class="o">(</span><span class="nl">StepCounter:</span><span class="o">:</span><span class="k">new</span><span class="o">,</span> <span class="s">"生成订单"</span><span class="o">,</span> <span class="s">"统计项"</span><span class="o">,</span> <span class="s">"事务每秒"</span><span class="o">);</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">averageLatency</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getTimer</span><span class="o">(</span><span class="s">"生成订单"</span><span class="o">,</span> <span class="s">"统计项"</span><span class="o">,</span> <span class="s">"平均生成时间"</span><span class="o">,</span> <span class="s">"单位"</span><span class="o">,</span> <span class="s">"MILLISECONDS"</span><span class="o">);</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">maxLatency</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getMaxGauge</span><span class="o">(</span><span class="s">"生成订单"</span><span class="o">,</span> <span class="s">"统计项"</span><span class="o">,</span> <span class="s">"最大生成时间"</span><span class="o">,</span> <span class="s">"单位"</span><span class="o">,</span> <span class="s">"MILLISECONDS"</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">makeOrder</span><span class="o">()</span> <span class="o">{</span>
+    <span class="kt">long</span> <span class="n">startTime</span> <span class="o">=</span> <span class="nc">System</span><span class="o">.</span><span class="na">nanoTime</span><span class="o">();</span>
+    <span class="c1">//处理订单逻辑</span>
+    <span class="c1">//...</span>
+    <span class="c1">//处理完毕</span>
+    <span class="kt">long</span> <span class="n">totalTime</span> <span class="o">=</span> <span class="nc">System</span><span class="o">.</span><span class="na">nanoTime</span><span class="o">()</span> <span class="o">-</span> <span class="n">startTime</span><span class="err">；</span>
+
+    <span class="c1">//增加订单数量</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderCount</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+    
+    <span class="c1">//更新Tps</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderTps</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+
+    <span class="c1">//记录订单生成处理时间</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">averageLatency</span><span class="o">.</span><span class="na">record</span><span class="o">(</span><span class="n">totalTime</span><span class="o">,</span> <span class="nc">TimeUnit</span><span class="o">.</span><span class="na">NANOSECONDS</span><span class="o">);</span>
+
+    <span class="c1">//记录最大订单生成时间，因为惯用毫秒作为最终输出，因此我们转换一下单位</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">maxLatency</span><span class="o">.</span><span class="na">update</span><span class="o">(</span><span class="nc">TimeUnit</span><span class="o">.</span><span class="na">NANOSECONDS</span><span class="o">.</span><span class="na">toMillis</span><span class="o">(</span><span class="n">totalTime</span><span class="o">));</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>注意事项：</p>
+
+<p>1.通过MonitorManager获取Monitor传递name和tag数组，最终输出的ID是它们连接后的字符串，所以请保持唯一性，上面的例子输出的Metrics为：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span><span class="nc">Double</span><span class="o">&gt;</span> <span class="n">metrics</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">measure</span><span class="o">();</span>
+
+<span class="c1">//metrics的keySet()将包含：</span>
+<span class="c1">//	订单数量(商品名=levis jeans,型号=512)</span>
+<span class="c1">//	生成订单(统计项=事务每秒)</span>
+<span class="c1">//	生成订单(统计项=平均生成时间,单位=MILLISECONDS)</span>
+<span class="c1">//	生成订单(统计项=最大生成时间,单位=MILLISECONDS)</span>
+</code></pre></div></div>
+
+<p>2.MonitorManager获取Monitor的方法均为<strong>获取或创建</strong>，因此多次传递相同的name和tag数组返回的是同一个计数器：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Counter</span> <span class="n">counter1</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">getCounter</span><span class="o">(</span><span class="s">"订单数量"</span><span class="o">,</span> <span class="s">"商品名"</span><span class="o">,</span> <span class="s">"levis jeans"</span><span class="o">,</span> <span class="s">"型号"</span><span class="o">,</span> <span class="s">"512"</span><span class="o">);</span>
+<span class="nc">Counter</span> <span class="n">counter2</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">getCounter</span><span class="o">(</span><span class="s">"订单数量"</span><span class="o">,</span> <span class="s">"商品名"</span><span class="o">,</span> <span class="s">"levis jeans"</span><span class="o">,</span> <span class="s">"型号"</span><span class="o">,</span> <span class="s">"512"</span><span class="o">);</span>
+
+<span class="n">counter1</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+<span class="n">counter2</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+
+<span class="nc">Assert</span><span class="o">.</span><span class="na">assertEquals</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span><span class="n">counter1</span><span class="o">.</span><span class="na">getValue</span><span class="o">());</span>
+<span class="nc">Assert</span><span class="o">.</span><span class="na">assertEquals</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span><span class="n">counter2</span><span class="o">.</span><span class="na">getValue</span><span class="o">());</span>
+<span class="nc">Assert</span><span class="o">.</span><span class="na">assertEquals</span><span class="o">(</span><span class="mf">2.0</span><span class="o">,</span><span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">measure</span><span class="o">().</span><span class="na">get</span><span class="o">(</span><span class="s">"订单数量(商品名=levis jeans,型号=512)"</span><span class="o">),</span><span class="mi">0</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p><strong>获取Monitor的方法性能较低，请在初始化阶段一次获取所需的Monitor，然后将它们缓存起来，请参照前面OrderController的做法。</strong></p>
+
+<p><strong>提示：Servo已经被Netflix标记为DEPRECATED，我们将在1.0.0-m2中使用Netflix spectator替换，扩展自定义Metrics的方式会有调整</strong></p>
+
+<h2 id="参考示例">参考示例</h2>
+<p>我们已经开发完成了两个使用场景可以作为参考：</p>
+<ol>
+  <li>demo/perf：在Console里打印Metrics；</li>
+  <li>metrics-prometheus：将Metrics发布为prometheus Producer。</li>
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#背景" id="markdown-toc-背景">背景</a></li>
+  <li><a href="#对接原理" id="markdown-toc-对接原理">对接原理</a></li>
+  <li><a href="#如何配置" id="markdown-toc-如何配置">如何配置</a>    <ul>
+      <li><a href="#全局配置" id="markdown-toc-全局配置">全局配置</a></li>
+      <li><a href="#依赖配置" id="markdown-toc-依赖配置">依赖配置</a></li>
+      <li><a href="#配置prometheus的prometheusyml" id="markdown-toc-配置prometheus的prometheusyml">配置Prometheus的prometheus.yml</a></li>
+      <li><a href="#验证输出" id="markdown-toc-验证输出">验证输出</a></li>
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+
+<h2 id="背景">背景</h2>
+<p><a href="http://www.prometheus.io/">prometheus</a>是相似于Google Borgmon的一个开源监控系统，也是<a href="https://www.cncf.io/">CNCF</a>的成员之一，目前社区非常活跃，Java Chassis Metrics在1.0.0-m1中支持对接prometheus，并进一步实现使用<a href="https://grafana.com/">Grafana</a>查询Metrics数据。</p>
+
+<h2 id="对接原理">对接原理</h2>
+<p>由于Java Chassis由Java语言开发，我们使用<a href="https://github.com/prometheus/client_java">prometheus java client</a>中的Simple Client作为对接SDK，版本为0.1.0。<br />
+Prometheus推荐Pull模式拉取Metrics数据，被监控微服务作为Producer发布数据provider接口，我们采用Simple HTTP Server发布微服务采集到的Metrics数据。<br />
+作为一个集成（可选）模块，代码在metrics-integration/metrics-prometheus中，你可以看到它依赖：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>io.prometheus<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>simpleclient<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>io.prometheus<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>simpleclient_httpserver<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+
+  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>metrics-core<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>因此一旦集成Prometheus引入了metrics-prometheus依赖后，不再需要添加metrics-core的依赖。</p>
+
+<h2 id="如何配置">如何配置</h2>
+<p>开启对接prometheus非常简单：</p>
+<h3 id="全局配置">全局配置</h3>
+<p>microservice.yaml中有如下配置项：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">metrics</span><span class="pi">:</span>
+    <span class="na">prometheus</span><span class="pi">:</span>
+      <span class="c1">#prometheus provider的端口</span>
+      <span class="na">port</span><span class="pi">:</span> <span class="m">9696</span>
+</code></pre></div></div>
+<p><em>如果不做配置，默认端口为9696</em></p>
+<h3 id="依赖配置">依赖配置</h3>
+<p>只需要添加metrics-prometheus依赖即可：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>metrics-prometheus<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<h3 id="配置prometheus的prometheusyml">配置Prometheus的prometheus.yml</h3>
+<p>你需要在prometheus.yml中配置数据采集job，例如</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">scrape_configs</span><span class="pi">:</span>
+  <span class="c1"># The job name is added as a label `job=&lt;job_name&gt;` to any timeseries scraped from this config.</span>
+  <span class="pi">-</span> <span class="na">job_name</span><span class="pi">:</span> <span class="s1">'</span><span class="s">prometheus'</span>
+
+    <span class="c1"># metrics_path defaults to '/metrics'</span>
+    <span class="c1"># scheme defaults to 'http'.</span>
+
+    <span class="na">static_configs</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="na">targets</span><span class="pi">:</span> <span class="pi">[</span><span class="s1">'</span><span class="s">localhost:9090'</span><span class="pi">]</span>
+
+  <span class="pi">-</span> <span class="na">job_name</span><span class="pi">:</span> <span class="s1">'</span><span class="s">servicecomb'</span>
+
+    <span class="c1"># metrics_path defaults to '/metrics'</span>
+    <span class="c1"># scheme defaults to 'http'.</span>
+
+    <span class="na">static_configs</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="na">targets</span><span class="pi">:</span> <span class="pi">[</span><span class="s1">'</span><span class="s">localhost:9696'</span><span class="pi">]</span>
+</code></pre></div></div>
+<p>其中job_name: ‘servicecomb’即自定义的job配置，目标是本地微服务localhost:9696，关于prometheus.yml的配置更多信息可以参考<a href="https://prometheus.io/docs/prometheus/latest/configuration/configuration/">这篇文章</a>。</p>
+
+<h3 id="验证输出">验证输出</h3>
+<p>Prometheus Simple HTTP Server使用/metrics作为默认URL，metrics-prometheus会使用9696作为默认端口，微服务启动后你可以使用http://localhost:9696/metrics 访问它。</p>
+
+<p>使用Prometheus Simple HTTP Server接口发布的数据是Prometheus采集的标准格式：</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code># HELP ServiceComb Metrics ServiceComb Metrics
+# TYPE ServiceComb Metrics untyped
+jvm{name="cpuRunningThreads",statistic="gauge",} 45.0
+jvm{name="heapMax",statistic="gauge",} 3.786407936E9
+jvm{name="heapCommit",statistic="gauge",} 6.12892672E8
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="max",status="200",unit="MILLISECONDS",} 1.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="tps",status="200",} 0.4
+jvm{name="nonHeapCommit",statistic="gauge",} 6.1104128E7
+jvm{name="nonHeapInit",statistic="gauge",} 2555904.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="execution",statistic="max",status="200",unit="MILLISECONDS",} 0.0
+jvm{name="heapUsed",statistic="gauge",} 2.82814088E8
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="latency",status="200",unit="MILLISECONDS",} 1.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="execution",statistic="latency",status="200",unit="MILLISECONDS",} 0.0
+jvm{name="heapInit",statistic="gauge",} 2.66338304E8
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="queue",statistic="waitInQueue",} 0.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="count",status="200",} 39.0
+jvm{name="nonHeapUsed",statistic="gauge",} 5.9361032E7
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="queue",statistic="latency",status="200",unit="MILLISECONDS",} 0.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="queue",statistic="max",status="200",unit="MILLISECONDS",} 0.0
+</code></pre></div></div>
+
+<h3 id="配置grafana可选">配置Grafana（可选）</h3>
+<p>如何在Grafana中添加Prometheus作为数据源请参考<a href="https://prometheus.io/docs/visualization/grafana/">这篇文章</a>。</p>
+<h2 id="运行效果">运行效果</h2>
+<p>配置好Prometheus并启动了微服务之后，就可以打开Prometheus Web界面（默认地址是http://localhost:9090/ ），在Metrics列表中看到ServiceComb开头的Java Chassis Metrics，如下图所示：</p>
+
+<p><img src="/assets/images/MetricsInPrometheus.png" alt="MetricsInPrometheus" /></p>
+
+<p>为了能够达到更好的查询效果，在Grafana中添加Prometheus作为数据源，通过Grafana查询数据如下图示：</p>
+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="1.0.0-m1版本写文件扩展和示例">
+    <meta itemprop="description" content="1.0.0-m1版本写文件扩展和示例">
+    
+    <meta itemprop="dateModified" content="December 29, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">1.0.0-m1版本写文件扩展和示例
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#背景" id="markdown-toc-背景">背景</a></li>
+  <li><a href="#全局配置" id="markdown-toc-全局配置">全局配置</a></li>
+  <li><a href="#依赖和代码使用" id="markdown-toc-依赖和代码使用">依赖和代码使用</a></li>
+  <li><a href="#使用spring-boot-starter开发注意事项" id="markdown-toc-使用spring-boot-starter开发注意事项">使用Spring Boot Starter开发注意事项</a></li>
+  <li><a href="#运行示例" id="markdown-toc-运行示例">运行示例</a></li>
+  <li><a href="#q--a" id="markdown-toc-q--a">Q &amp; A</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>微服务框架从0.5.0版本开始支持监控功能Metrics，1.0.0-m1版本正式发布，请通过查看用户手册和<a href="https://github.com/apache/servicecomb-java-chassis/releases">Release Note</a>获取更多信息，我们也会继续追加新特性新功能，欢迎订阅ServiceComb邮件列表(dev-subscribe@servicecomb.apache.org)参与讨论。</p>
+
+<h2 id="背景">背景</h2>
+<p>0.5.0版本的foundation-metrics实现了将采集到的Metrics数据写入文件，在1.0.0-m1中，此功能以Sample的形式移动到了samples/metrics-write-file-sample中；<br />
+从1.0.0-m1版本开始支持输出Operation级别的Metric，因此无法通过固定配置的方式配置日志输出，将采用代码的方式在运行时为每一个Metric自动创建专用的RollingFileAppender。
+示例代码包含如下三个模块：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Module名</th>
+      <th style="text-align: left">描述</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">metrics-write-file</td>
+      <td style="text-align: left">定期获取Metrics数据写入文件主模块</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">metrics-write-file-config-log4j-springboot</td>
+      <td style="text-align: left">使用Log4j的RollingFileAppender写文件</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">metrics-write-file-config-log4j2-springboot</td>
+      <td style="text-align: left">使用Log4j2的RollingFileAppender写文件</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><em>暂未提供logback的示例，参考Log4j和Log4j2的例子可以很容易实现</em></p>
+
+<h2 id="全局配置">全局配置</h2>
+<p>与0.5.0类似，需要在microservice.yaml中添加如下配置项：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">metrics</span><span class="pi">:</span>
+    <span class="c1">#1.0.0-m1日志输出间隔配置项，单位毫秒</span>
+    <span class="na">window_time</span><span class="pi">:</span> <span class="m">5000</span>
+    <span class="c1">#如果metric是浮点数，输出结果保留几位小数，默认为1</span>
+    <span class="na">round_places</span><span class="pi">:</span> <span class="m">1</span>
+    <span class="na">file</span><span class="pi">:</span>
+      <span class="c1">#日志根目录</span>
+      <span class="na">root_path</span><span class="pi">:</span> <span class="s">./log/metric/</span>
+      <span class="na">rolling</span><span class="pi">:</span>
+        <span class="c1">#最大保留文件数</span>
+        <span class="na">max_file_count</span><span class="pi">:</span> <span class="m">10</span>
+        <span class="c1">#文件最大大小，单位可以是KB，MB和GB</span>
+        <span class="na">max_file_size </span><span class="pi">:</span> <span class="s">10MB</span>
+</code></pre></div></div>
+<p>与0.5.0版本配置的比较：</p>
+<ol>
+  <li>旧版本使用servicecomb.metrics.polltime(单位秒)配置文件输出间隔，1.0.0-m1版本中旧版本功能仍然存在；</li>
+  <li>新版本添加依赖即启用，因此没有老版本类似servicecomb.metrics.file.enabled开关，这个开关可以用于关闭老版本输出（老版本预定在下一个版本1.0.0-m2中彻底移除）；</li>
+  <li>新版本无需配置servicecomb.metrics.filename_prefix，默认为微服务的appId.serviceName；</li>
+  <li>新版本增加了对rolling file的设置，这些配置在老版本是配置在日志的xml或properties文件里的。</li>
+</ol>
+
+<h2 id="依赖和代码使用">依赖和代码使用</h2>
+<ol>
+  <li>首先需要引入metrics-write-file模块，这个模块包含了获取Metrics数据并转化为指定格式后写文件的逻辑：
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.samples<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>metrics-write-file<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+    <p><em>也可以参考其中的实现修改代码或复制代码到项目中。</em></p>
+  </li>
+  <li>metrics-write-file模块不包含动态生成写文件RollingFileAppender的代码，根据项目实际使用的日志实现，如果是log4j，拷贝metrics-write-file-log4j-springboot模块中的Log4JMetricsFileWriter，如果是log4j2，拷贝metrics-write-file-log4j2-springboot模块中的Log4J2MetricsFileWriter。  <br />
+<em>也可以参考其中的实现修改代码或自己实现FileWriter。</em></li>
+</ol>
+
+<h2 id="使用spring-boot-starter开发注意事项">使用Spring Boot Starter开发注意事项</h2>
+<p>Java Chassis集成了Spring Boot Starter，如果使用Spring Boot Starter启动微服务同时又使用Log4j作为日志实现，则需要处理依赖问题，请参考samples/metrics-write-file-sample/metrics-write-file-log4j-springboot项目：</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="c">&lt;!--need exclusion log4j-over-slf4j--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;exclusions&gt;</span>
+        <span class="nt">&lt;exclusion&gt;</span>
+          <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+          <span class="nt">&lt;artifactId&gt;</span>log4j-over-slf4j<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;/exclusion&gt;</span>
+      <span class="nt">&lt;/exclusions&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+
+    <span class="c">&lt;!--servicecomb spring boot starter--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>Spring Boot Starter中包含了log4j-over-slf4j，这个Log Bridge并没有完全实现log4j的所有接口，包括RollingFileAppender，所以我们需要排除它让slf4j直接调用log4j而不是这个Log Bridge，请确定这种排除对你的系统不会有影响，关于log4j-over-slf4j的更多信息可以参考<a href="https://www.slf4j.org/legacy.html#log4j-over-slf4j">这篇文章</a>。</p>
+
+<h2 id="运行示例">运行示例</h2>
+<p>metrics-write-file-config-log4j-springboot和metrics-write-file-config-log4j2-springboot都是可以直接运行的示例项目，使用ServiceApplication启动完成后，观察输出目录target/metric/下会生成很多Metrics文件，如果在浏览器中刷新几下http://localhost:8080/f 请求，则可以看到对应的Operation的Metrics文件也会在目录下自动生成。  <br />
+<img src="/assets/images/MetricsWriteFileResult.png" alt="MetricsWriteFileResult" /></p>
+
+<h2 id="q--a">Q &amp; A</h2>
+<ol>
+  <li>
+    <p>在新的1.0.0-m1版本里，我是否还需要在日志配置文件（例如log4j2.xml） 中追加任何修改吗？<br />
+  不需要，会在运行态自动为metric生成对应的RollingFileAppender，并且这个Appender与你日志配置的Appenders没有任何关系。</p>
+  </li>
+  <li>
+    <p>我发现Log4J2MetricsFileWriter中创建RollingFileAppender是使用一个标记为过期的createAppender方法，为什么不使用新的的newBuilder … build模式？<br />
+  开发的时候发现newBuilder … build与微服务框架存在某种冲突导致不可用，另外，官方文档的<a href="https://logging.apache.org/log4j/2.x/manual/customconfig.html">示例代码</a>仍然使用的是createAppender，缺乏资料也给定位问题造成了一定的麻烦；我们未来会去改进，已标记TODO。</p>
+  </li>
+  <li>
+    <p>集成后出现RollingFileAppender抛ClassNotFoundException之类的错误？<br />
+  众所周知，Java开发主流都使用slf4j或jcl做为日志框架，然后桥接具体的日志实现，例如log4j、log4j2和logback，通过配置文件初始化日志组件，达到随意更换弱绑定的效果，并不推荐编码方式创建日志组件。
+  但由于1.0.0-m1版本开始支持Operation级别的Metric输出，不同的微服务Operation不同，并且单Operation会有15+以上的Metric，因此手动配置已不具备可操作性，必须通过Coding的方式动态生成RollingFileAppender。
+  如果你的项目中包含类似log4j-over-slf4j这样的Bridging依赖，就很可能会出现这样的问题，请使用mvn dependency:tree检查。</p>
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+          
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+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga用户手册</span>
+        
+
+        
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+          
+            
+            
+
+            
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+            <li><a href="https://docs.servicecomb.io/saga/zh_CN/index.html" class="">0.5.0</a></li>
+          
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+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">ServiceCenter用户手册</span>
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+          
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+          
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+    <meta itemprop="headline" content="运行模式">
+    <meta itemprop="description" content="运行模式">
+    
+    <meta itemprop="dateModified" content="June 06, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">运行模式
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#standalone模式" id="markdown-toc-standalone模式">standalone模式</a>    <ul>
+      <li><a href="#操作步骤" id="markdown-toc-操作步骤">操作步骤</a></li>
+    </ul>
+  </li>
+  <li><a href="#web容器模式" id="markdown-toc-web容器模式">WEB容器模式</a>    <ul>
+      <li><a href="#开发示例" id="markdown-toc-开发示例">开发示例</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>微服务框架当前提供了两种部署运行模式：standalone模式和web容器模式。推荐使用<strong>standalone模式</strong>拉起服务进程。</p>
+<h2 id="standalone模式">standalone模式</h2>
+<p>一个Standalone的容器，以简单的Main加载Spring启动，因为服务通常不需要Tomcat/JBoss等Web容器的特性，没必要用Web容器去加载服务。微框架提供了standalone部署运行模式，服务容器只是一个简单的Main方法，并加载一个简单的Spring容器，用于暴露服务。</p>
+
+<h3 id="操作步骤">操作步骤</h3>
+
+<ul>
+  <li>
+    <p><strong>步骤1</strong> 编写Main函数，初始化日志和加载服务配置，内容如下：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">MainServer</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+   <span class="err">　</span><span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span> <span class="err">#日志初始化</span>
+   <span class="err">　</span><span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span> <span class="err">#</span> <span class="nc">Spring</span> <span class="n">bean</span><span class="err">初始化</span>
+     <span class="c1">// other codes omitted</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>步骤2</strong> 运行MainServer即可启动该微服务进程，向外暴露服务。</p>
+
+    <p>注意：如果使用的是rest网络通道，需要将pom中的transport改为使用cse-transport-rest-vertx包。</p>
+  </li>
+</ul>
+
+<h2 id="web容器模式">WEB容器模式</h2>
+<p>如果需要将该微服务加载到web容器中启动运行时，需要新建一个servlet工程包装一下，该servlet工程，根据需要，可以不写或写少量的引导代码即可。</p>
+
+<h3 id="开发示例">开发示例</h3>
+
+<ul>
+  <li><strong>步骤1 新建servlet工程，修改web.xml文件如下：</strong></li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;web-app&gt;</span>
+    <span class="nt">&lt;context-param&gt;</span>
+        <span class="nt">&lt;param-name&gt;</span>contextConfigLocation<span class="nt">&lt;/param-name&gt;</span>
+        <span class="nt">&lt;param-value&gt;</span>
+            classpath*:META-INF/spring/*.bean.xml
+            classpath*:app-config.xml
+        <span class="nt">&lt;/param-value&gt;</span>
+    <span class="nt">&lt;/context-param&gt;</span>
+    <span class="nt">&lt;listener&gt;</span>
+        <span class="nt">&lt;listener-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServletContextListener<span class="nt">&lt;/listener-class&gt;</span>
+    <span class="nt">&lt;/listener&gt;</span>
+
+    <span class="nt">&lt;servlet&gt;</span>
+        <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>
+        <span class="nt">&lt;servlet-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServlet<span class="nt">&lt;/servlet-class&gt;</span>
+        <span class="nt">&lt;load-on-startup&gt;</span>1<span class="nt">&lt;/load-on-startup&gt;</span>
+        <span class="nt">&lt;async-supported&gt;</span>true<span class="nt">&lt;/async-supported&gt;</span>
+    <span class="nt">&lt;/servlet&gt;</span>
+    <span class="nt">&lt;servlet-mapping&gt;</span>
+        <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>
+        <span class="nt">&lt;url-pattern&gt;</span>/rest/*<span class="nt">&lt;/url-pattern&gt;</span>
+    <span class="nt">&lt;/servlet-mapping&gt;</span>
+<span class="nt">&lt;/web-app&gt;</span>
+</code></pre></div></div>
+
+<ul>
+  <li><strong>步骤2 修改pom文件</strong></li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependencies&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>transport-rest-servlet<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;/dependencies&gt;</span>
+<span class="nt">&lt;build&gt;</span>
+    <span class="nt">&lt;finalName&gt;</span>test<span class="nt">&lt;/finalName&gt;</span>
+<span class="nt">&lt;/build&gt;</span>
+</code></pre></div></div>
+
+<p><strong>注意事项:</strong></p>
+<ol>
+  <li>RESTful调用应该与web容器中其他静态资源调用（比如html、js等等）隔离开来，所以webroot后一段应该还有一层关键字，比如上面web.xml中举的例子（/test/rest）中的rest。</li>
+  <li>以tomcat为例，默认每个war包都有不同的webroot，这个webroot需要是basePath的前缀，比如webroot为test，则该微服务所有的契约都必须以/test打头。</li>
+  <li>当微服务加载在web容器中，并直接使用web容器开的http、https端口时，因为是使用的web容器的通信通道，所以需要满足web容器的规则。</li>
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+    <meta itemprop="headline" content="服务配置">
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+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务配置
+</h1>
+            
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+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#负载均衡策略" id="markdown-toc-负载均衡策略">负载均衡策略</a></li>
+  <li><a href="#限流策略" id="markdown-toc-限流策略">限流策略</a>    <ul>
+      <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+      <li><a href="#注意事项" id="markdown-toc-注意事项">注意事项</a></li>
+      <li><a href="#配置说明" id="markdown-toc-配置说明">配置说明</a></li>
+    </ul>
+  </li>
+  <li><a href="#降级策略" id="markdown-toc-降级策略">降级策略</a>    <ul>
+      <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+      <li><a href="#场景描述-1" id="markdown-toc-场景描述-1">场景描述</a></li>
+      <li><a href="#配置说明-1" id="markdown-toc-配置说明-1">配置说明</a></li>
+    </ul>
+  </li>
+  <li><a href="#示例代码" id="markdown-toc-示例代码">示例代码</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="负载均衡策略">负载均衡策略</h2>
+<p>本章节的内容已过时，新的负载均衡策略说明见<a href="https://docs.servicecomb.io/java-chassis/zh_CN/references-handlers/loadbalance.html">负载均衡</a></p>
+
+<h2 id="限流策略">限流策略</h2>
+<h3 id="场景描述">场景描述</h3>
+
+<p>用户在provider端使用限流策略，可以限制指定微服务向其发送请求的频率，达到限制每秒钟最大请求数量的效果。</p>
+
+<h3 id="注意事项">注意事项</h3>
+
+<ol>
+  <li>限流策略的控制并不是绝对精确的，可能会有少量误差。</li>
+  <li>provider端的流量控制是业务层面的功能，不是安全意义上的流量控制，如需防止DDoS攻击，需要结合其他的一系列措施。</li>
+  <li>流量控制是微服务级的，不是进程级的。</li>
+</ol>
+
+<h3 id="配置说明">配置说明</h3>
+
+<p>　　限流策略配置在microservice.yaml文件中，相关配置项见表2。要开启服务提供者端的限流策略，还需要在处理链中配置服务端限流handler，并添加pom依赖。</p>
+
+<p>　　microservice.yaml配置示例如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-provider</span>
+</code></pre></div></div>
+
+<p>　　添加handler-flowcontrol-qps的pom依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>handler-flowcontrol-qps<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>　　<strong>表2 QPS流控配置项说明</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Provider.qps.enabled</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">true/false</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否启用Provider流控</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Provider.qps.limit.[ServiceName]</td>
+      <td style="text-align: left">2147483647（max int）</td>
+      <td style="text-align: left">(0,2147483647]，整形</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">每秒钟允许的请求数</td>
+      <td style="text-align: left">仅支持microservice一个级别的配置</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Provider.qps.global.limit</td>
+      <td style="text-align: left">2147483647（max int）</td>
+      <td style="text-align: left">(0,2147483647]，整形</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">provider接受请求流量的全局配置</td>
+      <td style="text-align: left">没有具体到微服务的配置时，此配置生效</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="降级策略">降级策略</h2>
+<h3 id="概念阐述">概念阐述</h3>
+
+<p>降级策略是当服务请求异常时，微服务所采用的异常处理策略。降级策略有三个相关的技术概念：“隔离”、“熔断”、“容错”：</p>
+
+<p>降级策略有三个相关的技术概念：“隔离”、“熔断”、“容错”：</p>
+<ul>
+  <li>“隔离”是一种异常检测机制，常用的检测方法是请求超时、并发量过大等。一般的设置参数包括超时时间、同时并发请求个数等。</li>
+  <li>“熔断”是一种异常反应机制，“熔断”依赖于“隔离”。熔断通常基于错误率来实现。一般的设置参数包括统计请求的个数、错误率等。</li>
+  <li>“容错”是一种异常处理机制，“容错”依赖于“熔断”。熔断以后，会调用“容错”的方法。一般的设置参数包括调用容错方法的次数等。</li>
+</ul>
+
+<p>把这些概念联系起来：当”隔离”措施检测到N次请求中共有M次错误的时候，”熔断”不再发送后续请求，调用”容错”处理函数。这个技术上的定义，是和Netflix Hystrix一致的，通过这个定义，非常容易理解它提供的配置项，参考：<a href="https://github.com/Netflix/Hystrix/wiki/Configuration">https://github.com/Netflix/Hystrix/wiki/Configuration</a>。当前ServiceComb提供两种容错方式，分别为返回null值和抛出异常。</p>
+
+<h3 id="场景描述-1">场景描述</h3>
+
+<p>用户通过配置降级策略，可以设置微服务的异常处理策略。</p>
+
+<h3 id="配置说明-1">配置说明</h3>
+
+<p>　　配置项如表所示。</p>
+
+<p>　　<strong>表3 降级策略相关配置项说明</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.isolation.timeout.enabled</td>
+      <td style="text-align: left">FALSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否启用超时检测</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.isolation.timeoutInMilliseconds</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">超时时间阈值</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.isolation.maxConcurrentRequests</td>
+      <td style="text-align: left">10</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">最大并发数阈值</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.enabled</td>
+      <td style="text-align: left">TRUE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否启用熔断措施</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.forceOpen</td>
+      <td style="text-align: left">FALSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">不管失败次数，都进行熔断</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.forceClosed</td>
+      <td style="text-align: left">FALSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">任何时候都不熔断</td>
+      <td style="text-align: left">当与forceOpen同时配置时，forceOpen优先。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.sleepWindowInMilliseconds</td>
+      <td style="text-align: left">15000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">熔断后，多长时间恢复</td>
+      <td style="text-align: left">恢复后，会重新计算失败情况。注意：如果恢复后的调用立即失败，那么会立即重新进入熔断。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.requestVolumeThreshold</td>
+      <td style="text-align: left">20</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">10s内统计错误发生次数阈值，超过阈值则触发熔断</td>
+      <td style="text-align: left">由于10秒还会被划分为10个1秒的统计周期，经过1s中后才会开始计算错误率，因此从调用开始至少经过1s，才会发生熔断。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.errorThresholdPercentage</td>
+      <td style="text-align: left">50</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">错误率阈值，达到阈值则触发熔断</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.fallback.enabled</td>
+      <td style="text-align: left">TRUE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否启用出错后的故障处理措施</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.fallback.maxConcurrentRequests</td>
+      <td style="text-align: left">10</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">并发调用容错处理措施（servicecomb.fallbackpolicy.policy）的请求数，超过这个值则不再调用处理措施，直接返回异常</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.fallbackpolicy.policy</td>
+      <td style="text-align: left">throwexception</td>
+      <td style="text-align: left">returnnulll | throwexception</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">出错后的处理策略</td>
+      <td style="text-align: left"> </td>
+    </tr>
+  </tbody>
+</table>
+
+<p class="notice--warning"><strong>注意：</strong> 谨慎使用servicecomb.isolation.timeout.enabled=true。因为系统处理链都是异步执行，中间处理链的返回，会导致后面处理链的逻辑处理效果丢失。尽可能将servicecomb.isolation.timeout.enabled保持默认值false，并且正确设置网络层超时时间servicecomb.request.timeout=30000。</p>
+
+<h2 id="示例代码">示例代码</h2>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-consumer</span>
+  <span class="na">isolation</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">timeout</span><span class="pi">:</span>
+        <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+      <span class="na">timeoutInMilliseconds</span><span class="pi">:</span> <span class="m">30000</span>
+  <span class="na">circuitBreaker</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">sleepWindowInMilliseconds</span><span class="pi">:</span> <span class="m">15000</span>
+      <span class="na">requestVolumeThreshold</span><span class="pi">:</span> <span class="m">20</span>
+  <span class="na">fallback</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+  <span class="na">fallbackpolicy</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">policy</span><span class="pi">:</span> <span class="s">throwexception</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>说明：</strong></p>
+
+  <p>降级策略需要启用服务治理能力，对应的服务提供者的handler是<code class="highlighter-rouge">bizkeeper-provider</code>，服务消费者的handler是<code class="highlighter-rouge">bizkeeper-consumer</code>。如果省略了<code class="highlighter-rouge">Consumer:</code>/<code class="highlighter-rouge">Provider:</code>，策略将无法配置成功，此时服务治理将以默认配置生效。</p>
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+    <meta itemprop="headline" content="服务契约">
+    <meta itemprop="description" content="服务契约">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务契约
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#显式契约" id="markdown-toc-显式契约">显式契约</a>    <ul>
+      <li><a href="#配置说明" id="markdown-toc-配置说明">配置说明</a></li>
+      <li><a href="#示例代码" id="markdown-toc-示例代码">示例代码</a></li>
+    </ul>
+  </li>
+  <li><a href="#隐式契约" id="markdown-toc-隐式契约">隐式契约</a>    <ul>
+      <li><a href="#概念阐述-1" id="markdown-toc-概念阐述-1">概念阐述</a></li>
+      <li><a href="#场景描述-1" id="markdown-toc-场景描述-1">场景描述</a></li>
+      <li><a href="#涉及api" id="markdown-toc-涉及api">涉及API</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>服务契约，指基于OpenAPI规范的微服务接口契约，是服务端与消费端对于接口的定义。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>服务契约用于服务端和消费端的解耦，服务端围绕契约进行服务的实现，消费端根据契约进行服务的调用，可支持服务端和消费端采用不同的编程语言实现。</p>
+
+<h2 id="显式契约">显式契约</h2>
+
+<h3 id="配置说明">配置说明</h3>
+
+<p>ServiceComb使用yaml文件格式定义服务契约，推荐使用<a href="http://editor.swagger.io/#/">Swagger Editor</a>工具来编写契约，可检查语法格式及自动生成API文档。详细的契约文件格式请参考<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md">OpenAPI官方文档</a>。</p>
+
+<p>契约文件放置在”resources/microservices”或者”resources/applications”目录下，目录结构如下所示。</p>
+
+<pre><code class="language-txt">resources
+  - microservices
+    - serviceName #微服务名
+      - schemaId.yaml #schema接口的契约
+  - applications
+    - appId #应用ID
+      - serviceName #微服务名
+        - schemaId.yaml #schema接口的契约
+</code></pre>
+
+<h3 id="示例代码">示例代码</h3>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">swagger</span><span class="pi">:</span> <span class="s1">'</span><span class="s">2.0'</span>
+<span class="na">info</span><span class="pi">:</span>
+  <span class="na">title</span><span class="pi">:</span> <span class="s">hello</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">1.0.0</span>
+  <span class="na">x-java-interface</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.samples.common.schema.Hello</span>
+<span class="na">basePath</span><span class="pi">:</span> <span class="s">/springmvchello</span>
+<span class="na">produces</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="s">application/json</span>
+
+<span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/sayhi</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">sayHi</span>
+      <span class="na">parameters</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">name</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">query</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="na">200</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">正确返回</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+        <span class="na">default</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">默认返回</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+  <span class="s">/sayhello</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">sayHello</span>
+      <span class="na">parameters</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">person</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">body</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/definitions/Person"</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="na">200</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">正确返回</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+        <span class="na">default</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">默认返回</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+<span class="na">definitions</span><span class="pi">:</span>
+  <span class="na">Person</span><span class="pi">:</span>
+    <span class="na">type</span><span class="pi">:</span> <span class="s2">"</span><span class="s">object"</span>
+    <span class="na">properties</span><span class="pi">:</span>
+      <span class="na">name</span><span class="pi">:</span>
+        <span class="na">type</span><span class="pi">:</span> <span class="s2">"</span><span class="s">string"</span>
+        <span class="na">description</span><span class="pi">:</span> <span class="s2">"</span><span class="s">person</span><span class="nv"> </span><span class="s">name"</span>
+    <span class="na">xml</span><span class="pi">:</span>
+      <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">Person"</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>注意</strong>：</p>
+  <ul>
+    <li>根据swagger标准，basePath配置的路径需要包括web server的webroot。</li>
+    <li>info.x-java-interface需要标明具体的接口路径，根据项目实际情况而定。</li>
+  </ul>
+</blockquote>
+
+<h2 id="隐式契约">隐式契约</h2>
+<h3 id="概念阐述-1">概念阐述</h3>
+
+<p>　　隐式契约是指ServiceComb根据服务实现类自动生成的服务契约。</p>
+
+<h3 id="场景描述-1">场景描述</h3>
+
+<p>　　用户通过隐式契约功能，可以不预先定义契约和接口，直接定义实现类，在服务启动时，根据实现类自动生成契约，并注册到服务中心。</p>
+
+<h3 id="涉及api">涉及API</h3>
+
+<p>　　隐式契约可用于Spring MVC、JAX-RS、透明RPC三种开发模式，具体使用参见<a href="/cn/users/develop-with-springmvc/">用SpringMVC开发微服务</a>、<a href="/cn/users/develop-with-jax-rs/">用JAX-RS开发微服务</a>和<a href="/cn/users/develop-with-transparent-rpc/">用透明RPC开发微服务</a>。</p>
+
+<p>　　使用透明RPC模式开发微服务时，由于从代码上无法分辨微服务开发人员期望如何定义契约，所以生成的契约全是POST方法，所有method的入参被包装为一个class，作为body参数传递，所以建议使用隐式契约开发provider时，选择SpringMVC或JAX-RS开发模式，可以得到完整的RESTful声明。</p>
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+    <meta itemprop="headline" content="服务定义">
+    <meta itemprop="description" content="服务定义">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务定义
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#配置说明" id="markdown-toc-配置说明">配置说明</a></li>
+  <li><a href="#示例代码" id="markdown-toc-示例代码">示例代码</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>服务定义信息是微服务的身份标识，它定义了服务从属于哪个应用，以及名字和版本。服务定义信息中也可以有扩展信息，用于定义服务的属性元数据。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>当用户定义新的微服务或修改微服务的基本信息时，会涉及到服务定义信息的创建和修改操作。</p>
+
+<h2 id="配置说明">配置说明</h2>
+
+<p>介绍涉及microservice.yaml文件的以下配置项，文件在项目中的存放路径为src/main/resources/microservice.yaml。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">APPLICATION_ID</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">应用名</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.name</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">微服务名</td>
+      <td style="text-align: left">应确保app内部唯一。微服务名支持数字、大小写字母和”-“、”_“、”.”三个特殊字符，但是不能以特殊字符作为首尾字符，命名规范为：^[a-zA-Z0-9]+$|^[a-zA-Z0-9][a-zA-Z0-9_-.]*[a-zA-Z0-9]$。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.version</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">是</td>
+      <td style="text-align: left">微服务版本号</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.properties</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">微服务元数据配置（通过microservice.yaml文件进行配置）</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.propertyExtendedClass</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">微服务元数据配置（通过实现接口PropertyExtended进行配置）</td>
+      <td style="text-align: left">接口返回的配置会覆盖配置文件中key相同的配置。</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">instance_description.properties</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">服务实例元数据配置（通过microservice.yaml文件进行配置）</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">instance_description.propertyExtendedClass</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">微服务元数据配置（通过实现接口PropertyExtended进行配置）</td>
+      <td style="text-align: left">同service_description.propertyExtendedClass</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p>说明：</p>
+  <ul>
+    <li>服务的元数据会随服务一同注册到服务中心，如需修改，则要连同服务version一起变更。若想保持服务version不变，则需要通过服务管理中心统一变更元数据。</li>
+    <li>默认情况下，微服务只支持同一个app内部的服务调用。可在微服务的properties中配置allowCrossApp=true属性，开启可被跨app访问权限。</li>
+  </ul>
+</blockquote>
+
+<h2 id="示例代码">示例代码</h2>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">helloTest</span> <span class="c1">#应用名</span>
+<span class="na">service_description</span><span class="pi">:</span> <span class="c1">#服务描述</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">helloServer</span> <span class="c1">#微服务名称</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span> <span class="c1">#服务版本号</span>
+  <span class="na">properties</span><span class="pi">:</span> <span class="c1">#元数据</span>
+    <span class="na">allowCrossApp</span><span class="pi">:</span> <span class="no">false</span>
+    <span class="na">key1</span><span class="pi">:</span> <span class="s">value1</span>
+    <span class="na">key2</span><span class="pi">:</span> <span class="s">value2</span>
+  <span class="na">propertyExtendedClass</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.serviceregistry.MicroServicePropertyExtendedStub</span>
+<span class="na">instance_description</span><span class="pi">:</span> <span class="c1">#实例描述</span>
+  <span class="na">properties</span><span class="pi">:</span> <span class="c1">#元数据</span>
+    <span class="na">key3</span><span class="pi">:</span> <span class="s">value3</span>
+  <span class="na">propertyExtendedClass</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.serviceregistry.MicroServicePropertyExtendedStub</span>
+</code></pre></div></div>
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+    <meta itemprop="headline" content="服务心跳">
+    <meta itemprop="description" content="服务心跳">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务心跳
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#涉及api" id="markdown-toc-涉及api">涉及API</a></li>
+  <li><a href="#配置说明" id="markdown-toc-配置说明">配置说明</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>当微服务实例注册到服务中心后，微服务需要定时向服务中心发送心跳。若服务中心在一定时间内没有收到心跳信息，则会注销此实例。</p>
+
+<h2 id="涉及api">涉及API</h2>
+
+<ul>
+  <li><code class="highlighter-rouge">org.apache.servicecomb.serviceregistry.client.ServiceRegistryClient</code>：服务中心客户端</li>
+</ul>
+
+<h2 id="配置说明">配置说明</h2>
+
+<p><code class="highlighter-rouge">ServiceRegistryClient</code>提供了发送心跳的方法<code class="highlighter-rouge">heartbeat</code>，用户直接调用即可，示例代码如下：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+  <span class="c1">// 首先需要注册微服务和实例</span>
+  <span class="c1">// 发送心跳，不然实例会消失</span>
+  <span class="k">while</span> <span class="o">(</span><span class="kc">true</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"heartbeat sended:"</span> <span class="o">+</span> <span class="n">client</span><span class="o">.</span><span class="na">heartbeat</span><span class="o">(</span><span class="n">service2</span><span class="o">.</span><span class="na">getServiceId</span><span class="o">(),</span> <span class="n">instance</span><span class="o">.</span><span class="na">getInstanceId</span><span class="o">()));</span>
+    <span class="nc">Thread</span><span class="o">.</span><span class="na">sleep</span><span class="o">(</span><span class="mi">3000</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
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+    <meta itemprop="headline" content="服务接口约束">
+    <meta itemprop="description" content="服务接口约束">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">服务接口约束
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#接口约束说明" id="markdown-toc-接口约束说明">接口约束说明</a></li>
+  <li><a href="#详细的约束列表" id="markdown-toc-详细的约束列表">详细的约束列表</a></li>
+  <li><a href="#协议上的差异" id="markdown-toc-协议上的差异">协议上的差异</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="接口约束说明">接口约束说明</h2>
+<p>Java Chassis对于接口的使用约束建立在一个简单的原则上：接口定义即接口使用说明，不用通过查看代码实现，就能识别如何调用这个接口。举个例子：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nc">String</span> <span class="n">id</span><span class="o">);</span>
+<span class="kd">public</span> <span class="nc">Object</span> <span class="nf">query</span><span class="o">(</span><span class="nc">String</span> <span class="n">id</span><span class="o">);</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">Person</span> <span class="o">{</span><span class="nc">String</span> <span class="n">name</span><span class="o">;}</span>
+</code></pre></div></div>
+
+<p>显然如果调用接口一，我们知道要传递一个String类型的id参数，返回值是一个Person类型，Person里面存在String类型的name等参数。如果调用接口二，我们不知道怎么处理返回值，必须参考服务提供者的文档说明。可以看出，我们是站在使用者视角这边的，以更容易被使用作为参考。</p>
+
+<p>当我们要将接口发布为REST接口的时候，可以通过使用swagger文件，指定id使用RequestParam或者PathVariable或者RequestBody进行传递，也可以使用SpringMVC或者JAX RS提供的标签来描述。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nd">@RequestParam</span> <span class="nc">String</span> <span class="n">id</span><span class="o">);</span> 
+<span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">id</span><span class="o">);</span> 
+<span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">String</span> <span class="n">id</span><span class="o">);</span> 
+</code></pre></div></div>
+
+<p>通常，我们会将简单的数据类型，比如String, int等在RequestParam或者PathVariable传递，而把复杂的数据类型使用JSON编码以后在RequestBody传递，以减少HTTP协议限制可能给开发者带来的各种问题。</p>
+
+<h2 id="详细的约束列表">详细的约束列表</h2>
+<p>开发者不能在接口定义的时候使用如下类型：</p>
+
+<ul>
+  <li>比较抽象的数据结构: java.lang.Object, net.sf.json.JsonObject等</li>
+  <li>接口或者抽象类
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">interface</span> <span class="nc">IPerson</span> <span class="o">{...}</span>
+ <span class="kd">public</span> <span class="kd">abstract</span> <span class="kd">class</span> <span class="nc">AbstractPerson</span>  <span class="o">{...}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>泛型
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">class</span> <span class="nc">PersonHolder</span><span class="o">&lt;</span><span class="no">T</span><span class="o">&gt;</span> <span class="o">{...}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>上述类型的集合类型或者没指定类型的集合，比如：<code class="highlighter-rouge">List&lt;IPerson&gt;, Map&lt;String, PersonHolder&lt;?&gt;&gt;, List, Map</code>等。 <code class="highlighter-rouge">List&lt;String&gt;, List&lt;Person&gt;</code>这些具体类型是支持的。</p>
+  </li>
+  <li>包含上述类型作为属性的类型
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">class</span> <span class="nc">GroupOfPerson</span> <span class="o">{</span><span class="nc">IPerson</span> <span class="n">master</span> <span class="o">...}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>开发者不用担心记不住这些约束，程序会在启动的时候检查不支持的类型，并给与错误提示。</p>
+
+<h2 id="协议上的差异">协议上的差异</h2>
+<p>尽管ServiceComb-Java-Chassis实现了不同协议之间开发方式的透明，受限于底层协议的限制，不同的协议存在少量差异。</p>
+
+<ul>
+  <li>
+    <p>map，key只支持string</p>
+  </li>
+  <li>highway (protobuf限制)
+    <ol>
+      <li>不支持在网络上传递null，包括Collection、array中的元素，map的value</li>
+      <li>长度为0的数组、list，不会在网络上传递，接收端解码出来就是默认值</li>
+    </ol>
+  </li>
+  <li>springmvc
+    <ol>
+      <li>不支持Date作为path、query参数。 因为springmvc直接将Date做toString放在path、query中，与swagger的标准不匹配。</li>
+    </ol>
+  </li>
+</ul>
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+    <meta itemprop="headline" content="环境配置">
+    <meta itemprop="description" content="环境配置">
+    
+    <meta itemprop="dateModified" content="April 13, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">环境配置
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> 在本页上</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#安装java开发环境" id="markdown-toc-安装java开发环境">安装Java开发环境</a></li>
+  <li><a href="#运行-service-center" id="markdown-toc-运行-service-center">运行 Service Center</a>    <ul>
+      <li><a href="#运行-stand-alone-service-center" id="markdown-toc-运行-stand-alone-service-center">运行 Stand-alone Service Center</a></li>
+      <li><a href="#运行-service-center-集群" id="markdown-toc-运行-service-center-集群">运行 Service Center 集群</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="安装java开发环境">安装Java开发环境</h2>
+
+<ul>
+  <li>
+    <p>安装git，详情可参考<a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git">git安装教程</a></p>
+  </li>
+  <li>
+    <p>安装JDK 1.8，详情可参考<a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">JDK安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装Maven 3.x，详情可参考<a href="https://maven.apache.org/install.html" target="_blank">Maven安装教程</a>。</p>
+  </li>
+  <li>
+    <p>安装IntelliJ Idea IDE，详情可参考<a href="https://www.jetbrains.com/help/idea/installing-and-launching.html" target="_blank">IntelliJ安装教程</a>。</p>
+  </li>
+</ul>
+
+<h2 id="运行-service-center">运行 Service Center</h2>
+<h3 id="运行-stand-alone-service-center">运行 Stand-alone Service Center</h3>
+<p>运行Stand-alone Service Center有以下两种方式:</p>
+
+<ol>
+  <li>
+    <p>以可执行文件的方式运行</p>
+
+    <ul class="nav nav-tabs">
+  <li data-toggle="tab" class="active"><a data-toggle="tab" href="#windows">Windows</a></li>
+  <li data-toggle="tab"><a data-toggle="tab" href="#linux">Linux</a></li>
+</ul>
+
+    <div class="tab-content">
+  <div id="windows" class="tab-pane active">
+        <ol>
+          <li>下载<a href="http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz">服务注册中心可执行文件压缩包</a></li>
+          <li>解压缩到当前文件夹</li>
+          <li>进入解压缩后的目录，然后双击运行<strong>start-service-center.bat</strong>文件</li>
+        </ol>
+      </div>
+  <div id="linux" class="tab-pane fade">
+        <ol>
+          <li>下载服务注册中心可执行文件压缩包并解压缩
+            <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>wget http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz
+<span class="nb">tar </span>xvf apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz
+</code></pre></div>            </div>
+          </li>
+          <li>运行服务注册中心
+            <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>bash apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64/start-service-center.sh
+</code></pre></div>            </div>
+          </li>
+        </ol>
+
+        <p class="notice--warning">注意：前端（frontend）在Linux环境下默认会绑定ipv6地址，导致浏览器报错，修复办法为：先修改conf/app.conf中的httpaddr为外部可达网卡ip，之后修改app/appList/apiList.js中<code class="highlighter-rouge">ip : 'http://127.0.0.1'</code>为对应ip，最后重启ServiceCenter即可。</p>
+
+      </div>
+</div>
+
+    <p class="notice--warning">注意：Window和Linux版本均只支持64位系统。</p>
+  </li>
+  <li>
+    <p>以Docker的方式运行</p>
+  </li>
+</ol>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest
+</code></pre></div></div>
+
+<p class="notice--warning"><strong>注意事项：</strong> 服务注册中心运行后绑定的IP为：<em>http://127.0.0.1:30100</em>。<br />
+如使用Docker Toolbox，可通过 <code class="highlighter-rouge">docker-machine ip</code> 获取服务绑定IP地址。</p>
+
+<h3 id="运行-service-center-集群">运行 Service Center 集群</h3>
+<p>Service Center是一个无状态的应用因此它很容易以集群的模式部署提供HA。</p>
+
+<p>它依赖<a href="https://github.com/coreos/etcd">etcd</a>存储微服务的信息，etcd既支持standalone模式运行也支持<a href="https://coreos.com/etcd/docs/latest/op-guide/clustering.html">集群模式</a>运行。</p>
+
+<p>提示：我们强烈推荐etcd以集群模式运行，这样才能从整体上保证Service Center的HA能力；另外在这篇<a href="https://coreos.com/etcd/docs/latest/op-guide/runtime-configuration.html">文档</a>中我们可以了解到etcd需要部署至少三个节点才能够避免Majority Failure。</p>
+
+<p>部署了standalone或集群etcd后，你可以按下面的步骤部署Service Center集群，我们以在两台VM上各部署一个Service Center实例为例：</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: center">Name</th>
+      <th style="text-align: center">Address</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: center">VM1</td>
+      <td style="text-align: center">10.12.0.1</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">VM2</td>
+      <td style="text-align: center">10.12.0.2</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>我们假定你的etcd运行在http://10.12.0.4:2379 上：</p>
+
+<h5 id="第一步">第一步</h5>
+<p>在所有的VM上从<a href="https://github.com/apache/servicecomb-service-center/releases">ServiceComb官网</a>下载最新版本的Service Center并解压：</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">tar</span> <span class="nt">-xvf</span> service-center-X.X.X-linux-amd64.tar.gz
+</code></pre></div></div>
+
+<p>提示：请不要按stand-alone提示的方式执行start-service-center.sh，因为这样会启动内置的etcd。</p>
+
+<h5 id="第二步">第二步</h5>
+<p>编辑ServcieComb的配置文件，修改ip/port以及etcd地址：</p>
+<h6 id="vm1">VM1</h6>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>vi conf/app.conf
+</code></pre></div></div>
+
+<p>修改下面的配置 :</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>httpaddr = 10.12.0.1
+manager_cluster = "10.12.0.4:2379"
+</code></pre></div></div>
+
+<p>然后启动Service Center :</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>./service-center
+</code></pre></div></div>
+
+<h6 id="vm2">VM2</h6>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>vi conf/app.conf
+</code></pre></div></div>
+
+<p>修改下面的配置 :</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>httpaddr = 10.12.0.2
+manager_cluster = "10.12.0.4:2379"
+</code></pre></div></div>
+
+<p>然后启动Service Center :</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>./service-center
+</code></pre></div></div>
+
+<p>提示：在<code class="highlighter-rouge">manger_cluster</code>配置中你可以填写多个在etcd群集中的etcd实例地址：</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>manager_cluster= "10.12.0.4:2379,10.12.0.X:2379,10.12.0.X:2379"
+</code></pre></div></div>
+
+<h5 id="第三步">第三步</h5>
+<p>验证你部署完毕的Service Center实例 :</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>curl http://10.12.0.1:30101/v4/default/registry/health
+</code></pre></div></div>
+<p>将会返回下面的内容 :</p>
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+    </span><span class="nl">"instances"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+        </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"instanceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"d6e9e976f9df11e7a72b286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"serviceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"d6e99f4cf9df11e7a72b286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"endpoints"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+                </span><span class="s2">"rest://10.12.0.1:30100"</span><span class="w">
+            </span><span class="p">],</span><span class="w">
+            </span><span class="nl">"hostName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"service_center_10_12_0_1"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"UP"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"healthCheck"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+                </span><span class="nl">"mode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"push"</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"interval"</span><span class="p">:</span><span class="w"> </span><span class="mi">30</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"times"</span><span class="p">:</span><span class="w"> </span><span class="mi">3</span><span class="w">
+            </span><span class="p">},</span><span class="w">
+            </span><span class="nl">"timestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012543"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"modTimestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012543"</span><span class="w">
+        </span><span class="p">},</span><span class="w">
+        </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"instanceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"16d4cb35f9e011e7a58a286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"serviceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"d6e99f4cf9df11e7a72b286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"endpoints"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+                </span><span class="s2">"rest://10.12.0.2:30100"</span><span class="w">
+            </span><span class="p">],</span><span class="w">
+            </span><span class="nl">"hostName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"service_center_10_12_0_2"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"UP"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"healthCheck"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+                </span><span class="nl">"mode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"push"</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"interval"</span><span class="p">:</span><span class="w"> </span><span class="mi">30</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"times"</span><span class="p">:</span><span class="w"> </span><span class="mi">3</span><span class="w">
+            </span><span class="p">},</span><span class="w">
+            </span><span class="nl">"timestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012650"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"modTimestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012650"</span><span class="w">
+        </span><span class="p">}</span><span class="w">
+    </span><span class="p">]</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>我们可以看到Service Center能够自动发现所有正在集群中运行的实例，<a href="https://github.com/apache/servicecomb-java-chassis">Java-Chassis SDK</a>将使用这个特性至少找到一个Service Center实例。</p>
+
+<p>在你的microservice.yaml中你可以填写一个或多个Service Center实例，如果<a href="https://github.com/apache/servicecomb-java-chassis">Java-Chassis SDK</a>发现配置的第一个地址（实例）失败，它将会自动使用下一个地址（实例）：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s2">"</span><span class="s">http://10.12.0.1:30100,http://10.12.0.2:30100"</span>
+      <span class="na">autodiscovery</span><span class="pi">:</span> <span class="no">true</span>
+</code></pre></div></div>
+<p>上面的例子里包含了我们已经配置好的两个Service Center实例。</p>
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+  <li><a href="#场景描述" id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#配置说明" id="markdown-toc-配置说明">配置说明</a>    <ul>
+      <li><a href="#配置依赖服务" id="markdown-toc-配置依赖服务">配置依赖服务</a></li>
+      <li><a href="#手工配置服务契约" id="markdown-toc-手工配置服务契约">手工配置服务契约</a></li>
+      <li><a href="#从服务中心自动下载契约" id="markdown-toc-从服务中心自动下载契约">从服务中心自动下载契约</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>当服务消费者调用服务提供者的服务时，需要注册服务契约。消费者有两种方式获取提供者的服务契约，一种是从服务的提供方离线获取契约文件，手工配置到项目中；另一种是从服务中心自动下载契约。</p>
+
+<h2 id="配置说明">配置说明</h2>
+
+<blockquote>
+  <p>说明：服务契约的获取方式与服务消费者的开发方式是无关的，用户可以任意组合使用。</p>
+</blockquote>
+
+<h3 id="配置依赖服务">配置依赖服务</h3>
+
+<p>服务消费者需要在microservice.yaml文件中配置依赖的provider，示例配置如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="c1"># other configurations omitted</span>
+  <span class="na">references</span><span class="pi">:</span>
+    <span class="na">springmvc</span><span class="pi">:</span>
+      <span class="na">version-rule</span><span class="pi">:</span> <span class="s">0.0.1</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>version-rule是版本匹配规则，有四种格式：</p>
+
+  <ul>
+    <li>精确版本匹配：例如<code class="highlighter-rouge">version-rule: 0.0.1</code>，表示只匹配版本号为0.0.1的服务提供者</li>
+    <li>后续版本匹配：例如<code class="highlighter-rouge">version-rule: 1.0.0+</code>，表示匹配版本号大于或等于1.0.0的服务提供者</li>
+    <li>最新版本：<code class="highlighter-rouge">version-rule: latest</code>，表示匹配最新版本的服务提供者</li>
+    <li>版本范围：例如<code class="highlighter-rouge">1.0.0-2.0.2</code>，表示匹配版本号在1.0.0至2.0.2之间的服务提供者，包含1.0.0和2.0.2</li>
+  </ul>
+
+  <p>此配置项默认为<code class="highlighter-rouge">latest</code></p>
+</blockquote>
+
+<h3 id="手工配置服务契约">手工配置服务契约</h3>
+
+<p>服务消费者的开发者在线下拿到服务提供者的契约，配置到消费者工程的特定目录下。服务契约在项目中的存放目录与<a href="/cn/users/service-contract/">服务契约</a>的配置说明部分相同。</p>
+
+<p>microservice目录下的每一个目录代表一个微服务，微服务目录下的每一个yaml文件代表一个schema契约，文件名就是schemaId。applications目录下存放需要指明appId的服务契约，用于跨app调用等场景。目录结构如下所示：</p>
+<pre><code class="language-txt">resources
+  - microservices
+      - serviceName            # 微服务名
+          - schemaId.yaml      # schema接口的契约
+  - applications
+      - appId                  # 应用ID
+          - serviceName        # 微服务名
+              - schemaId.yaml  # schema接口的契约
+</code></pre>
+
+<h3 id="从服务中心自动下载契约">从服务中心自动下载契约</h3>
+
+<p>服务消费者也可以不用显式地将契约存放在项目目录中，当程序启动时，ServiceComb框架会自动根据microservice.yaml文件中配置的服务提供者的微服务名称和版本号，从服务中心自动下载契约信息。</p>
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content/cn/docs/users/use-tls/index.html

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+            
+            
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+            
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+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga用户手册</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="https://docs.servicecomb.io/saga/zh_CN/index.html" class="">0.5.0</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">ServiceCenter用户手册</span>
+        
+
+        
+        <ul>
+          
+            
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+
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+            
+
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+          
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+        
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+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="使用TLS通信">
+    <meta itemprop="description" content="使用TLS通信">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">使用TLS通信
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="场景描述">场景描述</h2>
+
+<p>用户通过简单的配置即可启用TLS通信，以保障数据的传输安全。</p>
+
+<h2 id="外部服务通信配置">外部服务通信配置</h2>
+
+<p>与外部服务通信相关的配置写在microservice.yaml文件中。</p>
+
+<ul>
+  <li>
+    <p>服务中心TLS通信配置
+ 微服务与服务中心的连接可以通过将http改为https启用TLS通信，配置示例如下：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">https://127.0.0.1:30100</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>服务提供者启用TLS通信
+ 服务提供者在配置服务监听地址时，可以通过在地址后面追加<code class="highlighter-rouge">?sslEnabled=true</code>开启TLS通信，示例如下：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">rest</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080?sslEnabled=true</span>
+   <span class="na">highway</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070?sslEnabled=true</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="证书配置">证书配置</h2>
+
+<p>证书配置项写在microservice.yaml文件中，支持统一制定证书，也可以添加tag进行更细粒度的配置，有tag的配置会覆盖全局配置，配置格式如下：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="s">ssl.[tag].[property]</span>
+</code></pre></div></div>
+
+<p>证书配置项见下表证书配置项说明表。</p>
+
+<p><strong>表1 证书配置项说明表</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">ssl.protocols</td>
+      <td style="text-align: left">TLSv1.2</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">协议列表</td>
+      <td style="text-align: left">使用逗号分隔</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.ciphers</td>
+      <td style="text-align: left">TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,<br />TLS_RSA_WITH_AES_128_GCM_SHA256</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">算法列表</td>
+      <td style="text-align: left">使用逗号分隔</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.authPeer</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否认证对端</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.checkCN.host</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">是否对证书的CN进行检查</td>
+      <td style="text-align: left">该配置项只对Consumer端，并且使用http协议有效，即Consumer端使用rest通道有效。对于Provider端、highway通道等无效。检查CN的目的是防止服务器被钓鱼，参考标准定义：<a href="https://tools.ietf.org/html/rfc2818。">https://tools.ietf.org/html/rfc2818。</a></td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.trustStore</td>
+      <td style="text-align: left">trust.jks</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">信任证书文件</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.trustStoreType</td>
+      <td style="text-align: left">JKS</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">信任证书类型</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.trustStoreValue</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">信任证书密码</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.keyStore</td>
+      <td style="text-align: left">server.p12</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">身份证书文件</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.keyStoreType</td>
+      <td style="text-align: left">PKCS12</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">身份证书类型</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.keyStoreValue</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">身份证书密码</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.crl</td>
+      <td style="text-align: left">revoke.crl</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">吊销证书文件</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.sslCustomClass</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">org.apache.servicecomb.foundation.ssl.SSLCustom的实现类</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">SSLCustom类的实现，用于开发者转换密码、文件路径等。</td>
+      <td style="text-align: left">-</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p><strong>说明</strong>：</p>
+
+  <ul>
+    <li>默认的协议算法是高强度加密算法，JDK需要安装对应的策略文件，参考：<a href="http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html">http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html</a>。 您可以在配置文件配置使用非高强度算法。</li>
+    <li>微服务消费者，可以针对不同的提供者指定证书（当前证书是按照HOST签发的，不同的提供者都使用一份证书存储介质，这份介质同时给微服务访问服务中心和配置中心使用）。</li>
+  </ul>
+</blockquote>
+
+<h2 id="服务中心的证书配置">服务中心的证书配置</h2>
+
+<p>目前支持使用环境变量来配置服务中心的TLS认证方式，默认开启TLS通信，双向认证模式，认证对端时同时校验对端是否匹配证书（CommonName）字段。服务管理中心的证书配置项说明见下表服务中心TLS证书配置项说明。</p>
+
+<p><strong>表2 服务中心TLS证书配置项说明</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">CSE_SSL_MODE</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">1/0<br />0:HTTPS<br />1:HTTP</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">设置协议模式</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">CSE_SSL_VERIFY_CLIENT</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">1/0<br />0:HTTPS<br />1:HTTP</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">设置HTTPS模式下是否认证对端</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">CSE_SSL_PASSPHASE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">设置HTTPS模式下的证书密钥访问密码</td>
+      <td style="text-align: left">-</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>服务管理中心配置文件为$APP_ROOT/conf/app.conf，配置项见，该配置暂不支持环境变量方式设置。</p>
+
+<p>表3 服务中心配置文件</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">默认值</th>
+      <th style="text-align: left">取值范围</th>
+      <th style="text-align: left">是否必选</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">ssl_protocols</td>
+      <td style="text-align: left">TLSv1.2</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">通信使用的SSL版本</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl_ciphers</td>
+      <td style="text-align: left">TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,<br />TLS_RSA_WITH_AES_128_GCM_SHA256,<br />TLS_RSA_WITH_AES_128_CBC_SHA</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">否</td>
+      <td style="text-align: left">配置使用算法列表</td>
+      <td style="text-align: left">由于服务中心支持HTTP/2协议，所以ssl_ciphers必须配置有TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256算法。TLS_RSA_WITH_AES_128_GCM_SHA256、TLS_RSA_WITH_AES_128_CBC_SHA被列为HTTP/2协议的不安全算法黑名单，但为了客户端算法兼容性，存在时必须配置到最后一位。</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="密钥物料及证书存放路径">密钥物料及证书存放路径</h2>
+
+<p><strong>表4 密钥物料及证书存放路径</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">配置项</th>
+      <th style="text-align: left">含义</th>
+      <th style="text-align: left">对应环境变量</th>
+      <th style="text-align: left">注意</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">/</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">INSTALL_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/cipher</td>
+      <td style="text-align: left">密钥物料存放目录</td>
+      <td style="text-align: left">CIPHER_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl</td>
+      <td style="text-align: left">证书存放目录</td>
+      <td style="text-align: left">SSL_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/trust.cer</td>
+      <td style="text-align: left">授信CA</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/server_key.pem</td>
+      <td style="text-align: left">已加密服务端私钥文件</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/server.cer</td>
+      <td style="text-align: left">服务器证书</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/cert_pwd</td>
+      <td style="text-align: left">用于存放解密私钥的对称加密密文文件</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps/ServiceCenter</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">APP_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps/ServiceCenter/conf</td>
+      <td style="text-align: left">服务管理中心配置文件目录</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps/ServiceCenter/conf/app.conf</td>
+      <td style="text-align: left">应用配置文件</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="示例代码">示例代码</h2>
+
+<p>microservice.yaml文件中启用TLS通信的配置示例如下：</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">https://127.0.0.1:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080?sslEnabled=true</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070?sslEnabled=true</span>
+
+<span class="c1">#########SSL options</span>
+<span class="s">ssl.protocols</span><span class="pi">:</span> <span class="s">TLSv1.2</span>
+<span class="s">ssl.authPeer</span><span class="pi">:</span> <span class="no">true</span>
+<span class="s">ssl.checkCN.host</span><span class="pi">:</span> <span class="no">true</span>
+
+<span class="c1">#########certificates config</span>
+<span class="s">ssl.trustStore</span><span class="pi">:</span> <span class="s">trust.jks</span>
+<span class="s">ssl.trustStoreType</span><span class="pi">:</span> <span class="s">JKS</span>
+<span class="s">ssl.trustStoreValue</span><span class="pi">:</span> <span class="s">Changeme_123</span>
+<span class="s">ssl.keyStore</span><span class="pi">:</span> <span class="s">server.p12</span>
+<span class="s">ssl.keyStoreType</span><span class="pi">:</span> <span class="s">PKCS12</span>
+<span class="s">ssl.keyStoreValue</span><span class="pi">:</span> <span class="s">Changeme_123</span>
+<span class="s">ssl.crl</span><span class="pi">:</span> <span class="s">revoke.crl</span>
+<span class="s">ssl.sslCustomClass</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.demo.DemoSSLCustom</span>
+</code></pre></div></div>
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+    
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+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">华为公有云常见问题
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>
+    <p><strong>Q: 在使用华为公有云时，设置镜像的标签只需要和上一次的标签不一样还是要和之前的都不一样？</strong></p>
+
+    <p>A: 由于Docker本身的机制中并没有实现每次都从远端拉取镜像的功能，因此，只要本地中有一个版本的镜像存在而且每次都通过该版本的标签来访问镜像时，读取的镜像则为最开始上传的镜像，后续对该标签镜像的更新并不会在本地生效。因此现有两种解决方案：</p>
+
+    <p>(1) 新上传的镜像的标签和之前的都不一样。</p>
+
+    <p>(2) 登录到后台去将原版本标签的镜像删除。</p>
+
+    <p>拓展：如果使用了华为公有云上面的编排功能，则可以通过设置imagePullPolicy为Always避免该问题。</p>
+  </li>
+  <li>
+    <p><strong>Q: 华为公有云运行时报错：WARN com.huawei.paas.monitor.DataFactory: Upload monitor data error. 使用的配置为：</strong></p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">monitor</span><span class="pi">:</span>
+     <span class="na">handler</span><span class="pi">:</span>
+       <span class="na">chain</span><span class="pi">:</span>
+         <span class="na">Provider</span><span class="pi">:</span>
+           <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+</code></pre></div>    </div>
+
+    <p>A: 这个是配置文件的错误，handler应该是在cse的下一级而不是monitor的下一级，正确的配置是：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">handler</span><span class="pi">:</span>
+     <span class="na">chain</span><span class="pi">:</span>
+       <span class="na">Provider</span><span class="pi">:</span>
+         <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: 微服务引擎CSE和ServiceComb有什么关系？</strong></p>
+
+    <p>A:  CSE（Cloud Service Engine）是ServiceComb的商业版，其中除了ServiceComb还包含了安全增强以及服务管控界面。 CSE的核心模块以及相关的开发框架都是和ServiceComb同源的。 基于ServiceComb开发的应用可以不修改代码，很方便地部署CSE环境中。</p>
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+    <meta itemprop="headline" content="常见问题">
+    <meta itemprop="description" content="常见问题">
+    
+    <meta itemprop="dateModified" content="October 29, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">常见问题
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>
+    <p><strong>Q: ServiceComb和SpringCloud是什么关系，具体的应用场景是什么？</strong></p>
+
+    <p>A: ServiceComb是华为基于内部多个大型IT系统实践提炼出来的一套微服务开发框架，在开发态基于最佳实践封装了一套微服务运行模型，这些能力对用户完全透明，可以通过配置引入功能和对其进行调整。在运维阶段充分考虑了微服务运维，提供了丰富的监控指标和动态治理能力。    <br />
+ B: ServiceComb的这套能力可以作为一个单独的开发框架，在需要轻量级微服务解决方案的的场景中单独使用，也可以建立在SpringCloud上，与SpringCloud提供的其他组件一起工作，在重量级场景中和SpringCloud一起产生 “1+1大于2”的效果。</p>
+  </li>
+  <li>
+    <p><strong>Q: 用IntelliJ的免费版开发，有什么问题？</strong></p>
+
+    <p>A: 没有问题，使用IntelliJ 开发，可参考 <a href="/cn/developers/setup-develop-environment/">Setup Developer Environment</a> 进行相应的环境配置。</p>
+  </li>
+  <li>
+    <p><strong>Q: 使用Java-Chassis这个框架时有什么需要注意的地方？</strong></p>
+
+    <p>A: 使用Java-Chassis有以下这些限制：
+ (1) 0.3.0-SNAPSHOT之前的版本不支持类似<code class="highlighter-rouge">@GetMapping</code>这样的标注。
+ (2) 所用到的HTTP请求方法一样时，如GET，则方法名不能重载。这是由于生成契约时方法名会作为其Operation ID，所以要保证其唯一性。
+ (3) 方法和类必须是public的。</p>
+  </li>
+  <li>
+    <p><strong>Q: 契约生成会报错Caused by: java.lang.Error: OperationId must be unique，不支持函数重载？</strong></p>
+
+    <p>A: 我们是支持函数重载的， 加上<code class="highlighter-rouge">@ApiOperation</code>标签即可，demo-pojo中有示例。每个接口必须有唯一的operation id。</p>
+  </li>
+  <li>
+    <p><strong>Q: 使用<em>spring-boot-starter-provider</em>这个依赖时，在<em>application.yml</em>文件中声明的<code class="highlighter-rouge">spring.main.web-application</code>属性并没有生效？</strong></p>
+
+    <p>A: 使用<em>starter-provider</em>这个依赖时，如果用到了servlet这种方式时，需要在<em>application.properties</em>这个文件引入<code class="highlighter-rouge">spring.main.web-application=true</code>这样的属性或者在<em>application.yml</em>文件中声明，但是此时需要新建一个<em>application.properties</em>的文件，其内容可以为空。</p>
+  </li>
+  <li>
+    <p><strong>Q: 网关依赖的jar和其他微服务的一样吗？</strong></p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+ <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+</code></pre></div>    </div>
+
+    <p>A: 网关除了要依赖<code class="highlighter-rouge">spring-boot-starter-provider</code>之外还要依赖<code class="highlighter-rouge">spring-boot-starter-discovery</code>，可以参考<a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">LinuxCon-Beijing-Workshop</a>中manager的实现。</p>
+  </li>
+  <li>
+    <p><strong>Q: 网关需要像其他微服务一样配置assembly吗？其中的/maven/gateway这个路径是docker maven plugin默认的吗？</strong></p>
+
+    <p>A: 需要，由于项目现在使用的是spring-boot的打包方式，docker maven plugin也是依赖打包生成的文件来生成docker镜像的。/maven这个路径是docker maven plugin指定的，而gateway这个路径是在assembly中指定的。</p>
+  </li>
+  <li>
+    <p><strong>Q: 服务接口的返回类型可以是任意类型吗？还是必须是responseEntity？</strong></p>
+
+    <p>A: 可以，具体可以参考java-chassis的<a href="https://github.com/apache/servicecomb-java-chassis/blob/master/integration-tests/springmvc-tests/src/test/java/org/apache/servicecomb/demo/springmvc/tests/SpringMvcIntegrationTestBase.java">integration-test的实现</a>。</p>
+  </li>
+  <li>
+    <p><strong>Q: 微服务启动后，无法正确调用接口，或返回不存在错误？</strong></p>
+
+    <p>A: 请检查调用路径与Producer实现代码中发布的路径完全一致。Producer端的启动日志可以查看到映射路径输出，例如：</p>
+
+    <p><code class="highlighter-rouge">[INFO] Swagger mapped "{[/hello/], method=[GET], produces=[application/json]}"</code></p>
+
+    <p>不同编程风格（模型）实现Producer的文档和注意事项请参见：<a href="/cn/users/develop-with-jax-rs/">Jaxrs</a> <a href="/cn/users/develop-with-springmvc/">SpringMVC</a> <a href="/cn/users/develop-with-transparent-rpc/">Pojo</a> <a href="/cn/users/develop-with-spring-boot-starter/">Spring Boot</a> 。</p>
+  </li>
+  <li>
+    <p><strong>Q: 在eclipse下修改了microservice.yaml配置文件下的端口号，启动程序后，端口号没生效？</strong></p>
+
+    <p>A: 需要单独导入sample项目，如果导入整个ServiceComb-Java-Chassis项目，由于sample目录不在ServiceComb-Java-Chassis模块中，IDE不会对sample进行编译,eclipse下并没有提示错误信息，IDEA下会有提示信息。因此eclipse启动sample的demo会发现修改了端口没有生效。</p>
+  </li>
+  <li>
+    <p><strong>Q: 如何自定义某个Java方法对应的REST接口里的HTTP Status Code？</strong></p>
+
+    <p>A: 对于正常的返回值，可以通过SwaggerAnnotation实现，例如：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@ApiResponse</span><span class="o">(</span><span class="n">code</span> <span class="o">=</span> <span class="mi">300</span><span class="o">,</span> <span class="n">response</span> <span class="o">=</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">message</span> <span class="o">=</span> <span class="s">""</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kt">int</span> <span class="nf">test</span><span class="o">(</span><span class="kt">int</span> <span class="n">x</span><span class="o">)</span> <span class="o">{</span>
+   <span class="k">return</span> <span class="mi">100</span><span class="o">;</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>对于异常的返回值，可以通过抛出自定义的InvocationException实现，例如：、</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="nc">String</span> <span class="nf">testException</span><span class="o">(</span><span class="kt">int</span> <span class="n">code</span><span class="o">)</span> <span class="o">{</span>
+   <span class="nc">String</span> <span class="n">strCode</span> <span class="o">=</span> <span class="nc">String</span><span class="o">.</span><span class="na">valueOf</span><span class="o">(</span><span class="n">code</span><span class="o">);</span>
+     <span class="k">switch</span> <span class="o">(</span><span class="n">code</span><span class="o">)</span> <span class="o">{</span>
+       <span class="k">case</span> <span class="mi">200</span><span class="o">:</span>
+         <span class="k">return</span> <span class="n">strCode</span><span class="o">;</span>
+       <span class="k">case</span> <span class="mi">456</span><span class="o">:</span>
+         <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="n">code</span><span class="o">,</span> <span class="n">strCode</span><span class="o">,</span> <span class="n">strCode</span> <span class="o">+</span> <span class="s">" error"</span><span class="o">);</span>
+       <span class="k">case</span> <span class="mi">556</span><span class="o">:</span>
+         <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="n">code</span><span class="o">,</span> <span class="n">strCode</span><span class="o">,</span> <span class="nc">Arrays</span><span class="o">.</span><span class="na">asList</span><span class="o">(</span><span class="n">strCode</span> <span class="o">+</span> <span class="s">" error"</span><span class="o">));</span>
+       <span class="k">case</span> <span class="mi">557</span><span class="o">:</span>
+         <span class="k">throw</span> <span class="k">new</span> <span class="nf">InvocationException</span><span class="o">(</span><span class="n">code</span><span class="o">,</span> <span class="n">strCode</span><span class="o">,</span> <span class="nc">Arrays</span><span class="o">.</span><span class="na">asList</span><span class="o">(</span><span class="nc">Arrays</span><span class="o">.</span><span class="na">asList</span><span class="o">(</span><span class="n">strCode</span> <span class="o">+</span> <span class="s">" error"</span><span class="o">)));</span>
+       <span class="k">default</span><span class="o">:</span>
+         <span class="k">break</span><span class="o">;</span>
+     <span class="o">}</span>
+
+   <span class="k">return</span> <span class="s">"not expected"</span><span class="o">;</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: 如何定制自己微服务的日志配置?</strong></p>
+
+    <p>A: ServiceComb不绑定日志器，只是使用了slf4j，用户可以自由选择log4j/log4j2/logback等等。ServiceComb提供了一个log4j的扩展，在标准log4j的基础上，支持log4j的properties文件的增量配置。</p>
+    <ul>
+      <li>默认以规则：”classpath*:config/log4j.properties”加载配置文件</li>
+      <li>实际会搜索出classpath中所有的<code class="highlighter-rouge">config/log4j.properties和config/log4j.*.properties</code>, 从搜索出的文件中切出<code class="highlighter-rouge">\*</code>的部分，进行alpha排序，然后按顺序加载，最后合成的文件作为log4j的配置文件。</li>
+      <li>如果要使用ServiceComb的log4j扩展，则需要调用Log4jUtils.init，否则完全按标准的日志器的规则使用。</li>
+    </ul>
+  </li>
+  <li>
+    <p><strong>Q: 当服务配置了多个transport的时候，在运行时是怎么选择使用哪个transport的？</strong></p>
+
+    <p>A:</p>
+    <ul>
+      <li>
+        <p>ServiceComb的consumer、transport、handler、producer之间是解耦的，各功能之间通过契约定义联合在一起工作的，即：
+ consumer使用透明rpc，还是springmvc开发与使用highway，还是RESTful在网络上传输没有关系与producer是使用透明rpc，还是jaxrs，或者是springmvc开发，也没有关系handler也不感知，业务开发方式以及传输方式</p>
+      </li>
+      <li>
+        <p>consumer访问producer，在运行时的transport选择上，总规则为：
+ consumer的transport与producer的endpoint取交集，如果交集后，还有多个transport可选择，则轮流使用</p>
+
+        <p>分解开来，存在以下场景：</p>
+      </li>
+      <li>当一个微服务producer同时开放了highway以及RESTful的endpoint
+        <ul>
+          <li>consumer进程中只部署了highway transport jar，则只会访问producer的highway endpoint</li>
+          <li>consumer进程中只部署了RESTful transport jar，则只会访问producer的RESTful endpoint</li>
+          <li>consumer进程中，同时部署了highway和RESTful transport jar，则会轮流访问producer的highway、RESTful endpoint</li>
+        </ul>
+
+        <p>如果，此时consumer想固定使用某个transport访问producer，可以在consumer进程的microservice.yaml中配置，指定transport的名称:</p>
+
+        <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">references</span><span class="pi">:</span>
+     <span class="s">&lt;service_name&gt;</span><span class="pi">:</span>
+       <span class="na">transport</span><span class="pi">:</span> <span class="s">highway</span>
+</code></pre></div>        </div>
+      </li>
+      <li>当一个微服务producer只开放了highway的endpoint
+        <ul>
+          <li>consumer进程只部署了highway transport jar，则正常使用highway访问</li>
+          <li>consumer进程只部署了RESTful transport jar，则无法访问</li>
+          <li>consumer进程同时部署了highway和RESTful transport jar，则正常使用highway访问</li>
+        </ul>
+      </li>
+      <li>当一个微服务producer只开放了RESTful的endpoint
+        <ul>
+          <li>consumer进程只部署了highway transport jar，则无法访问</li>
+          <li>consumer进程只部署了RESTful transport jar，则正常使用RESTful访问</li>
+          <li>consumer进程同时部署了highway和RESTful transport jar，则正常使用RESTful访问</li>
+        </ul>
+      </li>
+    </ul>
+  </li>
+  <li>
+    <p><strong>Q: swagger body参数类型定义错误，导致服务中心注册的内容没有类型信息</strong></p>
+
+    <p><strong>现象描述:</strong></p>
+
+    <p>定义如下接口，将参数放到body传递</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="s">/testInherate</span><span class="pi">:</span>
+     <span class="na">post</span><span class="pi">:</span>
+       <span class="na">operationId</span><span class="pi">:</span> <span class="s2">"</span><span class="s">testInherate"</span>
+       <span class="na">parameters</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="na">in</span><span class="pi">:</span> <span class="s2">"</span><span class="s">body"</span>
+         <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">xxxxx"</span>
+         <span class="na">required</span><span class="pi">:</span> <span class="no">false</span>
+         <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+       <span class="na">responses</span><span class="pi">:</span>
+         <span class="na">200</span><span class="pi">:</span>
+           <span class="na">description</span><span class="pi">:</span> <span class="s2">"</span><span class="s">response</span><span class="nv"> </span><span class="s">of</span><span class="nv"> </span><span class="s">200"</span>
+           <span class="na">schema</span><span class="pi">:</span>
+             <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/definitions/ResponseImpl"</span>
+</code></pre></div>    </div>
+
+    <p>采用上面方式定义接口。在服务注册以后，从服务中心查询下来的接口type: string 丢失，变成了：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="s">/testInherate</span><span class="pi">:</span>
+     <span class="na">post</span><span class="pi">:</span>
+       <span class="na">operationId</span><span class="pi">:</span> <span class="s2">"</span><span class="s">testInherate"</span>
+       <span class="na">parameters</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="na">in</span><span class="pi">:</span> <span class="s2">"</span><span class="s">body"</span>
+         <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">xxxxx"</span>
+         <span class="na">required</span><span class="pi">:</span> <span class="no">false</span>
+       <span class="na">responses</span><span class="pi">:</span>
+         <span class="na">200</span><span class="pi">:</span>
+           <span class="na">description</span><span class="pi">:</span> <span class="s2">"</span><span class="s">response</span><span class="nv"> </span><span class="s">of</span><span class="nv"> </span><span class="s">200"</span>
+           <span class="na">schema</span><span class="pi">:</span>
+             <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/definitions/ResponseImpl"</span>
+</code></pre></div>    </div>
+
+    <p>如果客户端没有放置swagger，还会报告如下异常：</p>
+
+    <div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Caused by: java.lang.ClassFormatError: Method "testInherate" in class ? has illegal signature "
+</code></pre></div>    </div>
+
+    <p>A：定义body参数的类型的时候，需要使用schema，不能直接使用type。</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="s">/testInherate</span><span class="pi">:</span>
+     <span class="na">post</span><span class="pi">:</span>
+       <span class="na">operationId</span><span class="pi">:</span> <span class="s2">"</span><span class="s">testInherate"</span>
+       <span class="na">parameters</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="na">in</span><span class="pi">:</span> <span class="s2">"</span><span class="s">body"</span>
+         <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">request"</span>
+         <span class="na">required</span><span class="pi">:</span> <span class="no">false</span>
+         <span class="na">schema</span><span class="pi">:</span>
+           <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+       <span class="na">responses</span><span class="pi">:</span>
+         <span class="na">200</span><span class="pi">:</span>
+           <span class="na">description</span><span class="pi">:</span> <span class="s2">"</span><span class="s">response</span><span class="nv"> </span><span class="s">of</span><span class="nv"> </span><span class="s">200"</span>
+           <span class="na">schema</span><span class="pi">:</span>
+             <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/definitions/ResponseImpl"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb微服务框架服务调用是否使用长连接?</strong></p>
+
+    <p>A: http使用的是长连接（有超时时间），highway方式使用的是长连接（一直保持）。</p>
+  </li>
+  <li>
+    <p><strong>Q: 服务断连服务中心注册信息是否自动删除</strong></p>
+
+    <p>A: 服务中心心跳检测到服务实例不可用，只会移除服务实例信息，服务的静态数据不会移除。</p>
+  </li>
+  <li>
+    <p><strong>Q: 如果使用tomcat方式集成ServiceComb微服务框架，如何实现服务注册</strong></p>
+
+    <p>A: 如果使用cse sdk servlet方式（使用transport-rest-servlet依赖）制作为war包部署到tomcat，需要保证，服务描述文件（microservice.yaml）中rest端口配置和外置容器一致才能实现该服务的正确注册。否则无法感知tomcat开放端口。</p>
+  </li>
+  <li>
+    <p><strong>Q: 如果使用tomcat方式集成CSE微服务框架，服务注册的时候如何将war包部署的上下文注册到服务中心</strong></p>
+
+    <p>A: 发布服务接口的时候需要将war包部署的上下文（context）放在baseurl最前面，这样才能保证注册到服务中心的路径是完整的路径（包含了上下文）。实例：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@path</span><span class="o">(/{</span><span class="n">context</span><span class="o">}/</span><span class="n">xxx</span><span class="o">)</span>
+ <span class="kd">class</span> <span class="nc">ServiceA</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb微服务框架如何实现数据多个微服务间透传</strong></p>
+
+    <p>A:
+ 透传数据塞入：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">CseHttpEntity</span><span class="o">&lt;</span><span class="n">xxxx</span><span class="o">.</span><span class="na">class</span><span class="o">&gt;</span> <span class="n">httpEntity</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">CseHttpEntity</span><span class="o">&lt;&gt;(</span><span class="n">xxx</span><span class="o">);</span>
+ <span class="c1">//透传内容</span>
+ <span class="n">httpEntity</span><span class="o">.</span><span class="na">addContext</span><span class="o">(</span><span class="s">"contextKey"</span><span class="o">,</span><span class="s">"contextValue"</span><span class="o">);</span>
+ <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="n">responseEntity</span> <span class="o">=</span> <span class="nc">RestTemplateBuilder</span><span class="o">.</span><span class="na">create</span><span class="o">().</span><span class="na">exchange</span><span class="o">(</span><span class="s">"cse://springmvc/springmvchello/sayhello"</span><span class="o">,</span><span class="nc">HttpMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">,</span><span class="n">httpEntity</span><span class="o">,</span><span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+</code></pre></div>    </div>
+
+    <p>透传数据获取：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@Override</span>
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span><span class="o">=</span><span class="s">"/sayhello"</span><span class="o">,</span><span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">,</span><span class="nc">InvocationContext</span> <span class="n">context</span><span class="o">){</span>
+   <span class="c1">//透传数据获取</span>
+   <span class="n">context</span><span class="o">.</span><span class="na">getContext</span><span class="o">();</span>
+   <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb微服务框架服务如何自定义返回状态码?</strong></p>
+
+    <p>A:</p>
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@Override</span>
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhello"</span><span class="o">,</span><span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">){</span>
+   <span class="nc">InvocationContext</span> <span class="n">context</span> <span class="o">=</span> <span class="nc">ContextUtils</span><span class="o">.</span><span class="na">getInvocationContext</span><span class="o">();</span>
+   <span class="c1">//自定义状态码</span>
+   <span class="n">context</span><span class="o">.</span><span class="na">setStatus</span><span class="o">(</span><span class="nc">Status</span><span class="o">.</span><span class="na">CREATED</span><span class="o">);</span>
+   <span class="k">return</span> <span class="s">"Hello person "</span><span class="o">+</span><span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb body Model部分暴露</strong></p>
+
+    <p>A: 一个接口对应的body对象中，可能有一些属性是内部的，不想开放出去，生成schema的时候不要带出去，使用：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@ApiModelProperty</span><span class="o">(</span><span class="n">hidden</span> <span class="o">=</span> <span class="kc">true</span><span class="o">)</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb框架获取远端consumer的地址</strong></p>
+
+    <p>A: 如果使用http rest方式（使用transport-rest-vertx依赖）可以用下面这种方式获取：</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">AbstractProducerContextArgMapper</span> <span class="n">httpRequestCreator</span> <span class="o">=</span> <span class="o">(</span><span class="nc">AbstractProducerContextArgMapper</span><span class="o">)</span><span class="n">invocation</span><span class="o">.</span><span class="na">getHandlerContext</span><span class="o">().</span><span class="na">get</span><span class="o">(</span><span class="nc">RestConst</span><span class="o">.</span><span class="na">HTTP_REQUEST_CREATOR</span><span class="o">);</span>
+ <span class="k">if</span><span class="o">(</span><span class="n">httpRequestCreator</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">){</span>
+   <span class="nc">HttpServletRequest</span> <span class="n">req</span> <span class="o">=</span> <span class="o">(</span><span class="nc">HttpServletRequest</span><span class="o">)</span><span class="n">httpRequestCreator</span><span class="o">.</span><span class="na">createContextArg</span><span class="o">(</span><span class="n">invocation</span><span class="o">);</span>
+   <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">req</span><span class="o">.</span><span class="na">getRemoteHost</span><span class="o">());</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>实际场景是拿最外层的地址，所以应该是LB传入到edgeservice，edgeService再放到context外下传递。</p>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb不支持泛型</strong></p>
+
+    <p>A: 明确不支持，需要修改接口，接口修改后需要修改版本号，以免consumer还是使用旧的版本。</p>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb对handler描述</strong></p>
+
+    <p>A: consumer默认的handler是simpleLB，没有配置的时候handler链会使用这个，如果配置了handler，里面一定要包含lb的handler，否则调用报错，需要在文档里面进行说明。</p>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb日志替换</strong></p>
+
+    <p>A: CSE java-chassis日志推荐方式是在启动的时候使用Log4jUtils.init()，直接使用推荐的Log4j来做日志管理，但是有些场景不想用log4j，比如想使用log4j2或者logback，下面以log4j2为例简单介绍下步骤：</p>
+
+    <ol>
+      <li>在代码里面不要使用Log4jUtils.init()；</li>
+      <li>去掉log4j的配置文件（不删掉也没关系，因为不会使用）；</li>
+      <li>exclude掉CSE框架引入的log4j，例如：
+        <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>provider-springmvc<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;exclusions&gt;</span>
+        <span class="nt">&lt;exclusion&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>log4j<span class="nt">&lt;/groupId&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>log4j<span class="nt">&lt;/artifactId&gt;</span>
+        <span class="nt">&lt;/exclusion&gt;</span>
+    <span class="nt">&lt;/exclusions&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>        </div>
+      </li>
+      <li>
+        <p>引入log4j2的依赖</p>
+
+        <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>    
+    <span class="nt">&lt;groupId&gt;</span>org.apache.logging.log4j<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>log4j-slf4j-impl<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.logging.log4j<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>log4j-api<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.logging.log4j<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>log4j-core<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>        </div>
+
+        <p>如果没有版本依赖管理，还需要填写上版本号。</p>
+      </li>
+      <li>
+        <p>加入log4j2的配置文件log4j2.xml，关于这个请查看官方说明，例如：</p>
+
+        <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+ <span class="c">&lt;!--日志级别以及优先级排序: OFF &gt; FATAL &gt; ERROR &gt; WARN &gt; INFO &gt; DEBUG &gt; TRACE &gt; ALL --&gt;</span>
+ <span class="c">&lt;!--Configuration后面的status，这个用于设置log4j2自身内部的信息输出，可以不设置，当设置成trace时，你会看到log4j2内部各种详细输出--&gt;</span>
+ <span class="c">&lt;!--monitorInterval：Log4j能够自动检测修改配置 文件和重新配置本身，设置间隔秒数--&gt;</span>
+ <span class="nt">&lt;configuration</span> <span class="na">status=</span><span class="s">"WARN"</span> <span class="na">monitorInterval=</span><span class="s">"30"</span><span class="nt">&gt;</span>
+     <span class="c">&lt;!--先定义所有的appender--&gt;</span>
+     <span class="nt">&lt;appenders&gt;</span>
+     <span class="c">&lt;!--这个输出控制台的配置--&gt;</span>
+         <span class="nt">&lt;console</span> <span class="na">name=</span><span class="s">"Console"</span> <span class="na">target=</span><span class="s">"SYSTEM_OUT"</span><span class="nt">&gt;</span>
+         <span class="c">&lt;!--输出日志的格式--&gt;</span>
+             <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"</span><span class="nt">/&gt;</span>
+         <span class="nt">&lt;/console&gt;</span>
+         <span class="c">&lt;!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，这个也挺有用的，适合临时测试用--&gt;</span>
+         <span class="nt">&lt;File</span> <span class="na">name=</span><span class="s">"log"</span> <span class="na">fileName=</span><span class="s">"log/test.log"</span> <span class="na">append=</span><span class="s">"false"</span><span class="nt">&gt;</span>
+            <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"</span><span class="nt">/&gt;</span>
+         <span class="nt">&lt;/File&gt;</span>
+         <span class="c">&lt;!-- 这个会打印出所有的info及以下级别的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档--&gt;</span>
+         <span class="nt">&lt;RollingFile</span> <span class="na">name=</span><span class="s">"RollingFileInfo"</span> <span class="na">fileName=</span><span class="s">"${sys:user.home}/logs/info.log"</span>
+                      <span class="na">filePattern=</span><span class="s">"${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log"</span><span class="nt">&gt;</span>
+             <span class="c">&lt;!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch）--&gt;</span>
+             <span class="nt">&lt;ThresholdFilter</span> <span class="na">level=</span><span class="s">"info"</span> <span class="na">onMatch=</span><span class="s">"ACCEPT"</span> <span class="na">onMismatch=</span><span class="s">"DENY"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;Policies&gt;</span>
+                 <span class="nt">&lt;TimeBasedTriggeringPolicy/&gt;</span>
+                 <span class="nt">&lt;SizeBasedTriggeringPolicy</span> <span class="na">size=</span><span class="s">"100 MB"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;/Policies&gt;</span>
+         <span class="nt">&lt;/RollingFile&gt;</span>
+         <span class="nt">&lt;RollingFile</span> <span class="na">name=</span><span class="s">"RollingFileWarn"</span> <span class="na">fileName=</span><span class="s">"${sys:user.home}/logs/warn.log"</span>
+                      <span class="na">filePattern=</span><span class="s">"${sys:user.home}/logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log"</span><span class="nt">&gt;</span>
+             <span class="nt">&lt;ThresholdFilter</span> <span class="na">level=</span><span class="s">"warn"</span> <span class="na">onMatch=</span><span class="s">"ACCEPT"</span> <span class="na">onMismatch=</span><span class="s">"DENY"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;Policies&gt;</span>
+                 <span class="nt">&lt;TimeBasedTriggeringPolicy/&gt;</span>
+                 <span class="nt">&lt;SizeBasedTriggeringPolicy</span> <span class="na">size=</span><span class="s">"100 MB"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;/Policies&gt;</span>
+             <span class="c">&lt;!-- DefaultRolloverStrategy属性如不设置，则默认为最多同一文件夹下7个文件，这里设置了20 --&gt;</span>
+             <span class="nt">&lt;DefaultRolloverStrategy</span> <span class="na">max=</span><span class="s">"20"</span><span class="nt">/&gt;</span>
+         <span class="nt">&lt;/RollingFile&gt;</span>
+         <span class="nt">&lt;RollingFile</span> <span class="na">name=</span><span class="s">"RollingFileError"</span> <span class="na">fileName=</span><span class="s">"${sys:user.home}/logs/error.log"</span>
+                      <span class="na">filePattern=</span><span class="s">"${sys:user.home}/logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log"</span><span class="nt">&gt;</span>
+             <span class="nt">&lt;ThresholdFilter</span> <span class="na">level=</span><span class="s">"error"</span> <span class="na">onMatch=</span><span class="s">"ACCEPT"</span> <span class="na">onMismatch=</span><span class="s">"DENY"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;Policies&gt;</span>
+                 <span class="nt">&lt;TimeBasedTriggeringPolicy/&gt;</span>
+                 <span class="nt">&lt;SizeBasedTriggeringPolicy</span> <span class="na">size=</span><span class="s">"100 MB"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;/Policies&gt;</span>
+         <span class="nt">&lt;/RollingFile&gt;</span>
+     <span class="nt">&lt;/appenders&gt;</span>
+     <span class="c">&lt;!--然后定义logger，只有定义了logger并引入的appender，appender才会生效--&gt;</span>
+     <span class="nt">&lt;loggers&gt;</span>
+         <span class="c">&lt;!--过滤掉spring和mybatis的一些无用的DEBUG信息--&gt;</span>
+         <span class="nt">&lt;logger</span> <span class="na">name=</span><span class="s">"org.springframework"</span> <span class="na">level=</span><span class="s">"INFO"</span><span class="nt">&gt;&lt;/logger&gt;</span>
+         <span class="nt">&lt;logger</span> <span class="na">name=</span><span class="s">"org.mybatis"</span> <span class="na">level=</span><span class="s">"INFO"</span><span class="nt">&gt;&lt;/logger&gt;</span>
+         <span class="nt">&lt;root</span> <span class="na">level=</span><span class="s">"all"</span><span class="nt">&gt;</span>
+             <span class="nt">&lt;appender-ref</span> <span class="na">ref=</span><span class="s">"Console"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;appender-ref</span> <span class="na">ref=</span><span class="s">"RollingFileInfo"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;appender-ref</span> <span class="na">ref=</span><span class="s">"RollingFileWarn"</span><span class="nt">/&gt;</span>
+             <span class="nt">&lt;appender-ref</span> <span class="na">ref=</span><span class="s">"RollingFileError"</span><span class="nt">/&gt;</span>
+         <span class="nt">&lt;/root&gt;</span>
+     <span class="nt">&lt;/loggers&gt;</span>
+ <span class="nt">&lt;/configuration&gt;</span>
+</code></pre></div>        </div>
+      </li>
+      <li>启动服务进行验证</li>
+    </ol>
+  </li>
+  <li>
+    <p><strong>Q: 服务超时设置</strong></p>
+
+    <p>A: 在微服务描述文件（microservice.yaml）中添加如下配置：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">request</span><span class="pi">:</span>
+     <span class="na">timeout</span><span class="pi">:</span> <span class="m">30000</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: URL 地址就可以唯一定位，为什么要加上一个schema？</strong></p>
+
+    <p>A:</p>
+    <ol>
+      <li>schema 是用来匹配服务契约的，用来保证服务端和消费端契约兼容，每个契约需要一个唯一ID，在服务中心存储。</li>
+      <li>schema映射到java的interface概念，在consumer使用透明rpc模式开发时，可以找到是微服务里的哪个operation。schema之间的方法名是没有唯一性要求的。</li>
+      <li>operation qualified name是治理的key，而URL 因为path参数的存在，没办法直接查找，而qualified name是不会变的。治理是不区分传输的，如果治理按URL 走，那么highway调进来时，还得根据参数反向构造出url，再来正则表达式匹配，太折腾了。</li>
+      <li>http只是一种传输通道，还有别的传输通道不需要映射到URL的。</li>
+    </ol>
+  </li>
+  <li>
+    <p><strong>Q: rest客户端调用的时候，实际上只带上了服务名和URL，并不需要指定schema id的， 而实际上根据这个URL也能找到具体契约的，所以指定schema id作用何在？</strong></p>
+
+    <p>A: 由于透明rpc是接口式调用，并没有URL，内部实际都归一化到operation来描述的，这样就可以结合schema id唯一定位到具体的请求处理中。</p>
+  </li>
+  <li>
+    <p><strong>Q: Transport是个什么概念？用来干什么的？</strong></p>
+
+    <p>A: transport负责编解码，以及传输。通信模型有rest和highway两种，highway对应的是私有协议，使用protobuf编码，rest用的是json。highway和rest都是基于vertx做的，vertx是基于netty的。</p>
+  </li>
+  <li>
+    <p><strong>Q: 框架中引入了vertx会有什么好处？</strong></p>
+
+    <p>A: 启用vertx的标准工作模式更强大，不过对业务人员要求就有些高了，目前还没开放业务接口出来。vertx标准的reactive工作模式，要求业务代码中不能有任何的block wait,sleep，大循环，总之不能有阻塞，做到这一点，就可以用更少的CPU，提供更多的服务。</p>
+  </li>
+  <li>
+    <p><strong>Q: 一个服务提供者里面会有多个 appid 和微服务吗？什么场景会出现这种情况？</strong></p>
+
+    <p>A: 会，这里表达的是一个merge的概念。microservice.yaml文件，可能同时存在于jar，磁盘，命令行参数指定这几个地方，此时他们按优先级合并，是用于增加灵活性的。在jar里的是默认值，在此之外，还有环境变量，命令行参数，配置中心覆盖，提供多层定制。</p>
+  </li>
+  <li>
+    <p><strong>Q: ServiceComb和服务中心是怎么交互的?</strong></p>
+
+    <p>A: 走rest，主要负责注册，取数据和心跳等；watch事件走websocket，watch事件是观察服务中心实例信息有没有变更。</p>
+  </li>
+  <li>
+    <p><strong>Q: 有类似dubbo那种治理中心吗？</strong></p>
+
+    <p>A: bizkeeper是一个handler，是治理的其中一个内容。治理可以通过handler扩展。</p>
+  </li>
+  <li>
+    <p><strong>Q: service path怎么理解？</strong></p>
+
+    <p>A: 每个微服务有一个servicePathManager，每一个schema将自己的path注册进去。</p>
+  </li>
+  <li>
+    <p><strong>Q: 浏览器能直接访问微服务Endpoint吗？</strong></p>
+
+    <p>A: 可以，restful发布的微服务Endpoint，可以直接在浏览器中使用HTTP加service path访问提供get方法的服务，如果是访问其他Http方法提供的服务建议安装使用<a href="https://www.sap.com/developer/tutorials/api-tools-postman-install.html">Postman</a>。</p>
+  </li>
+  <li>
+    <p><strong>Q: 契约生成时，需要强制带上版本号和语言吗？</strong></p>
+
+    <p>A: 契约是属于微服务的，微服务本来就有版本，但语言是不应该带上版本号的。应该契约要求与语言无关。契约“没有版本”，契约的版本体现在微服务上，实例能找到所属的微服务的版本，就能找到一个确定的契约。</p>
+  </li>
+  <li>
+    <p><strong>Q: ServiceRegistry里的设计代码和Eureka很类似？</strong></p>
+
+    <p>A: 我们第一个版本就是在Spring Cloud的基础上做的 后来随着发展发现不够用了才逐渐自己做的一套，所以的确是在充分参考Eureka后设计的。</p>
+  </li>
+  <li>
+    <p><strong>Q: 有些rpc是netty调用redis实现，比直接netty转发优势在哪里？</strong></p>
+
+    <p>A: 可能是想用redis解决订阅发布吧。但这样意义也不大，之前也尝试过这么用，但后来都改成ServiceComb了。</p>
+  </li>
+  <li>
+    <p><strong>Q: 如果同时引入了<code class="highlighter-rouge">transport-rest-servlet</code>和<code class="highlighter-rouge">transport-rest-vertx</code>的依赖，那么它怎么决定采用哪一个？</strong></p>
+
+    <p>A: 如果端口没被占用，就用vertx；如果被占用了，就用servlet。</p>
+  </li>
+  <li>
+    <p><strong>Q: qps流控设计时是出于什么场景考虑的？</strong></p>
+
+    <p>A: 限流有两个主要作用，第一通过给不同的消费者限流保证对一些重点服务的服务效果，第二防止雪崩效应。可根据服务的重要性来决定水管的粗细，ServiceComb是支持消费端限流和服务端限流两种限流方式的，消费端限流可以做到比较精细的控制。</p>
+  </li>
+  <li>
+    <p><strong>Q: 如果服务端是链式调用，即类似a-&gt;b-&gt;c，那设置了qps 流控会不会造成水管粗细不均的事情？</strong></p>
+
+    <p>A: 一般采取的模式是先测量再设置。qps设置最终是结合整体业务需求来进行调控的，而不是就单个节点来进行设置。</p>
+  </li>
+  <li>
+    <p><strong>Q: 通过cse://serviceName/appPath调用服务失败，报错:java.lang.Error:not support def type:class io.swagger.models.properties xxx</strong></p>
+
+    <p>A: 检查consumer和provider依赖的java-chassis版本是否一致，如果不一致请修改并使用较新版本。</p>
+  </li>
+  <li>
+    <p><strong>Q: 发送rest请求时，出现如下报错：Bad Request,description:http:request body too large</strong></p>
+
+    <p>A: 检查Service Center是否老版本，如果是，则升级到最新版本。</p>
+  </li>
+  <li>
+    <p><strong>Q: 如何在契约DTO中忽略中指定的属性？</strong></p>
+
+    <p>A: 如果是使用rest transport，因为是Json序列化，可以使用@JsonIgnore注解标记需要忽略的属性；highway transport目前尚不支持。注意修改后需要更新微服务的version，例如:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">OutputForTest</span><span class="o">{</span>
+<span class="nd">@JsonIgnore</span>
+<span class="kd">private</span> <span class="nc">String</span> <span class="n">outputId</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span>
+<span class="kd">private</span> <span class="nc">String</span> <span class="n">inputId</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span>
+<span class="o">...</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: 如何在用户自定义的handler中获取header中某个字段的值</strong></p>
+
+    <p>A: Invocation.getArgs可以获取到接口定义里面声明的所有参数信息。在接口里面未定义的信息，比如额外的header，则需要通过InvocationContext来传递和获取。基本原理是实现HttpServerFilter将header设置到InvocationContext里面，然后在通过invocation.getContext获取。示例代码可以参考servicecomb-fence的 <a href="https://github.com/apache/servicecomb-fence/tree/master/api/edge-service/endpoint/src/main/java/org/apache/servicecomb/authentication/edge">AuthHandler 和 AuthenticationFilter</a> 。</p>
+  </li>
+  <li>
+    <p><strong>Q: 微服务运行时抛出异常：<code class="highlighter-rouge"> java.lang.Error:not support def type:calss io.swagger.models.properties BaseIntegerProperty</code>？</strong></p>
+
+    <p>A: 可将Service Center升级至最新版本来解决。<a href="http://servicecomb.apache.org/cn/release/">ServiceComb版本下载传送门</a>。</p>
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content/cn/release/compatibleversion.html

diff --git a/content/cn/release/compatibleversion.html b/content/cn/release/compatibleversion.html
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+            
+            
+
+            <li><a href="/release/saga-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Releases Compatibility">
+    <meta itemprop="description" content="ServiceComb Compatibility">
+    
+    <meta itemprop="dateModified" content="June 21, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Releases Compatibility
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>这里列举了与Java-Chassis版本相兼容的Service-Center信息。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>Java-Chassis</th>
+      <th>Service-Center</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>Java-Chassis-1.1.0</td>
+      <td>Service-Center-1.1.0 or above</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-1.0.0</td>
+      <td>Service-Center-1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-1.0.0-m2</td>
+      <td>Service-Center-1.0.0m2</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-1.0.0-m1</td>
+      <td>Service-Center-1.0.0m1 or above</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-0.5.0</td>
+      <td>Service-Center-0.5.0</td>
+    </tr>
+  </tbody>
+</table>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
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+    <ins class="adsbygoogle"
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+        <!-- start custom footer snippets -->
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+    
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+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Get started</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_release/cn/compatible_version.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
+        </li>
+      </ul>
+    </div>
+  </div>
+</div>
+<div class="page__footer-bottom">
+  <div>&copy; 2019 Apache ServiceComb. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>
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content/cn/release/index.html

diff --git a/content/cn/release/index.html b/content/cn/release/index.html
new file mode 100644
index 0000000..378af01
--- /dev/null
+++ b/content/cn/release/index.html
@@ -0,0 +1,752 @@
+<!doctype html>
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+    <meta charset="utf-8">
+
+<!-- begin SEO -->
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+<title>ServiceComb Releases - Apache ServiceComb</title>
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+<meta name="description" content="ServiceComb Releases">
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+
+<meta property="og:locale" content="cn">
+<meta property="og:site_name" content="Apache ServiceComb">
+<meta property="og:title" content="ServiceComb Releases">
+
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+  <meta property="og:url" content="https://github.com/pages/apache/incubator-servicecomb-website/cn/release/">
+
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+  <meta property="og:description" content="ServiceComb Releases">
+
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+  <meta name="twitter:site" content="@ServiceComb">
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+  <meta name="twitter:url" content="">
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+    <meta name="twitter:card" content="summary">
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+
+
+  <script type="application/ld+json">
+    {
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+      "name" : "Apache ServiceComb",
+      "url" : "https://github.com/pages/apache/incubator-servicecomb-website",
+      "sameAs" : null
+    }
+  </script>
+
+
+
+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
+
+
+
+
+<!-- end SEO -->
+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
+<!-- http://t.co/dKP3o1e -->
+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+<script>
+  document.documentElement.className = document.documentElement.className.replace(/\bno-js\b/g, '') + ' js ';
+</script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>
+<script src="/assets/vendor/prism/prism.js"></script>
+
+<script type="text/javascript" async
+  src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML">
+</script>
+
+<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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+<!-- For all browsers -->
+<link rel="stylesheet" href="/assets/css/main.css?v=1">
+<link rel="stylesheet" href="/assets/vendor/prism/prism.css?v=1">
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+  <style>
+    /* old IE unsupported flexbox fixes */
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+      padding-right: 3em;
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+    .greedy-nav button {
+      position: absolute;
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+      height: 100%;
+    }
+  </style>
+<![endif]-->
+
+<meta http-equiv="cleartype" content="on">
+
+    <!-- start custom head snippets -->
+
+<!-- insert favicons. use http://realfavicongenerator.net/ -->
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+<script src="/assets/js/custom.js"></script>
+<!-- end custom head snippets -->
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+
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+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->
+    <div class="masthead" onmouseleave="$('#childrenShow').css('display', 'none')">
+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/cn"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/cn/">首页</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/cn/developers/">项目</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+            <li class="def-nav-li" onmouseenter="$('#childrenShow').css('display', 'block')">
+              
+              
+              
+
+              
+                <a href="/cn/docs/users/">文档</a>
+              
+
+              <ul id="childrenShow" class="def-children-show" onmouseleave="$('#childrenShow').css('display', 'none')">
+                
+                <li><a href="/cn/docs/quick-start/" class="">入门指南</a></li>
+                
+                <li><a href="/cn/docs/users/" class="">用户手册</a></li>
+                
+                <li><a href="/cn/slides/" class="">大咖视频</a></li>
+                
+                <li><a href="/cn/faqs/" class="">常见问题</a></li>
+                
+              </ul>
+            </li>
+          
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/cn/developers/contributing">社区</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/cn/year-archive/">博文</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a class="active" href="/cn/release/">下载</a>
+                
+              </li>
+            
+          
+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
+          
+            
+            
+            <a href=/release/>English</a>
+          
+        </div>
+      </nav>
+    </div>
+  </div>
+</div>
+
+
+    
+
+
+
+<div id="main" role="main">
+  
+  <div class="sidebar sticky">
+      
+      <div class="back-to-home"><a href="/cn/">首页</a> > ServiceComb Releases</div>
+      
+  
+  
+    
+      
+      
+      
+    
+    
+      
+
+<nav class="nav__list">
+  
+  <input id="ac-toc" name="accordion-toc" type="checkbox" />
+  <label for="ac-toc">切换菜单</label>
+  <ul class="nav__items">
+    
+      <li>
+        
+          <span class="nav__sub-title">Service-Center</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/service-center-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/service-center-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Kie</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/kie-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/kie-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Java-Chassis</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/java-chassis-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/java-chassis-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Mesher</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/mesher-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/mesher-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/pack-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/pack-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Toolkit</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/toolkit-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/toolkit-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Releases">
+    <meta itemprop="description" content="ServiceComb Releases">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Releases
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>使用以下链接从我们的一个镜像下载ServiceComb工具包版本。 您必须使用从我们的主分发目录下载的签名来验证下载文件的完整性。</p>
+
+<p>主分发站点及其镜像仅提供当前推荐的版本。</p>
+
+<p><strong>稳定发布版 - 最新版本:</strong></p>
+
+<ul>
+  <li>
+    <p><a href="/cn/release/service-center-downloads/">ServiceComb Service-Center 1.3.0</a> (released on 2019-11-07)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/toolkit-downloads/">ServiceComb toolkit 0.1.0</a> (released on 2019-09-04)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/pack-downloads/">ServiceComb Pack 0.5.0</a> (released on 2019-08-26)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.3.0</a> (released on 2019-10-31)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/saga-actuator-downloads/">ServiceComb Saga Actuator 0.3.0</a> (released on 2018-12-18)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/saga-downloads/">ServiceComb Saga 0.2.1</a> (released on 2018-11-23)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/mesher-downloads/">ServiceComb Mesher 1.6.3</a> (released on 2019-9-9)</p>
+  </li>
+  <li>
+    <p><a href="/cn/release/kie-downloads/">ServiceComb Kie 0.1.0</a> (released on 2019-10-26)</p>
+  </li>
+</ul>
+
+<p><strong>先前发行版本 :</strong></p>
+
+<ul>
+  <li><a href="/cn/release/service-center-downloads/">ServiceComb Service-Center 1.2.0</a> (released on 2019-04-06)</li>
+  <li><a href="/cn/release/service-center-downloads/">ServiceComb Service-Center 1.1.0</a> (released on 2018-11-30)</li>
+  <li><a href="/cn/release/service-center-downloads/">ServiceComb Service-Center 1.0.0</a> (released on 2018-08-02)</li>
+  <li><a href="/cn/release/service-center-downloads/">ServiceComb Service-Center 1.0.0-m2</a> (released on 2018-06-21)</li>
+  <li>
+    <p><a href="/cn/release/service-center-downloads/">ServiceComb Service-Center 1.0.0-m1</a> (released on 2018-03-27)</p>
+  </li>
+  <li><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.2.1</a> (released on 2019-05-19)</li>
+  <li><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.2.0</a> (released on 2019-04-12)</li>
+  <li><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.1.0</a> (released on 2018-11-30)</li>
+  <li><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.0.0</a> (released on 2018-08-02)</li>
+  <li><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.0.0-m2</a> (released on 2018-06-21)</li>
+  <li>
+    <p><a href="/cn/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.0.0-m1</a> (released on 2018-04-02)</p>
+  </li>
+  <li><a href="/cn/release/pack-downloads/">ServiceComb Pack 0.4.0</a> (released on 2019-04-06)</li>
+  <li><a href="/cn/release/pack-downloads/">ServiceComb Pack 0.3.0</a> (released on 2019-01-02)</li>
+  <li><a href="/cn/release/saga-downloads/">ServiceComb Saga 0.2.0</a> (released on 2018-06-21)</li>
+  <li><a href="/cn/release/saga-downloads/">ServiceComb Saga 0.1.0</a> (released on 2018-03-27)</li>
+</ul>
+
+<p><strong>注意:</strong></p>
+<ul>
+  <li>请查看 <a href="/cn/release/compatibleversion">兼容版本</a> 获取版本兼容信息.</li>
+</ul>
+
+<p><strong>验证发行版本</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性至关重要。可以使用GPG或PGP验证PGP签名。请下载<a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a> 以及相关发行版的asc签名文件。 建议从主发行版<a href="https://www.apache.org/dist/servicecomb/">目录</a> 中获取这些文件，而不是从镜像中获取。</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg -import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件/源，您可以从主分发目录下载相关的asc文件，并按照以下指南进行操作。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-********.asc apache-servicecomb-*********
+
+or
+
+pgpv apache-servicecomb-********.asc
+
+or
+
+pgp apache-servicecomb-********.asc
+
+
+</code></pre></div></div>
+
+<p>或者，您可以从主发行版<a href="https://www.apache.org/dist/servicecomb/">repo</a>下载SHA签名，并使用sha512sum或者shasum验证下载。</p>
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+          
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+        
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+        
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+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
+
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+          
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+          
+            
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+
+            
+            
+
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+          
+        </ul>
+        
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+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
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+          
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+          
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+
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+            
+
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+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Java-Chassis下载">
+    <meta itemprop="description" content="ServiceComb Java-Chassis Downloads">
+    
+    <meta itemprop="dateModified" content="April 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Java-Chassis下载
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>源码</th>
+      <th>发布包</th>
+      <th>Recommended Version of Service-Center</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Java-Chassis 1.3.0 (Latest)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Java-Chassis 1.2.1</td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Java-Chassis 1.2.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Java-Chassis 1.1.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Java-Chassis 1.0.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Java-Chassis 1.0.0-m2</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0-m2</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Java-Chassis 1.0.0-m1</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0-m1</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/" target="_blank">目录</a> 中获取这些文件，而不是从镜像中获取这些文件。</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-java-chassis-********.asc apache-servicecomb-java-chassis-*********
+
+or
+
+pgpv apache-servicecomb-java-chassis-********.asc
+
+or
+
+pgp apache-servicecomb-java-chassis-********.asc
+
+
+</code></pre></div></div>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/" target="_blank">仓库</a>下载SHA签名并使用sha512sum验证。</p>
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+    <meta itemprop="headline" content="Release Notes">
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+    
+    <meta itemprop="dateModified" content="April 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.3.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1304">SCB-1304</a>] -         FallbackPolicy interface support returns an exception
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1305">SCB-1305</a>] -         CseAsyncRestTemplate is not support set headers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1306">SCB-1306</a>] -         When the request body of VertxServerRequestToHttpServletRequest is modified, the field VertxServerRequestToHttpServletRequest#inputStream should be set to null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1318">SCB-1318</a>] -         There may be memory leak in RSAProviderTokenManager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1390">SCB-1390</a>] -         quick start java-chassis samples bmi has some errors
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1475">SCB-1475</a>] -         ServiceCombServerStats.getFailedRate may arise an  exception of java.lang.ArithmeticException: / by zero under concurrency scenarios
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1511">SCB-1511</a>] -         when use method override, the generated swagger body is wrong
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1513">SCB-1513</a>] -         merge config items according to priority
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1520">SCB-1520</a>] -         using RPC and when first paramter type is Object, the second parameter value will be null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1543">SCB-1543</a>] -         java-chassis dependency structure is wrong and compile fail in clean environment
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1274">SCB-1274</a>] -         when service center is unavailable, service should enter safe mode.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1278">SCB-1278</a>] -         ServiceComb related headers are not exposed to 3rd party services by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1287">SCB-1287</a>] -         refactor edge dispatcher to make them more extensible
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1291">SCB-1291</a>] -         Support rest interface method overriding by @ApiOperation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1297">SCB-1297</a>] -         Print warn log about config resolving failure while fetching config from Spring Environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1308">SCB-1308</a>] -         Improve instance isolation mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1392">SCB-1392</a>] -         If Multiple java bean param types are given the same name by using @ApiModel, there should be error tips in microservice&#39;s booting log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1402">SCB-1402</a>] -         BeanUtils.getImplClassFromBean can not return correctly info in cglib proxy situation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1405">SCB-1405</a>] -         support maxWaitQueueSize setting in RestTransportClient
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1407">SCB-1407</a>] -         Add new field when print provideCache log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1431">SCB-1431</a>] -         set all dependency version as properties in java-chasis-dependencies
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1434">SCB-1434</a>] -         add a springboot2 archetype
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1437">SCB-1437</a>] -         Upgrading third party dependency versions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1448">SCB-1448</a>] -         support class inheritance and interface inheritance with template type
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1450">SCB-1450</a>] -         Microservice instance may get stuck when watch connection to sc is recovered and pulling instance action is executed in eventloop thread
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1451">SCB-1451</a>] -         Printing the service information on the log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1457">SCB-1457</a>] -         delete no use code in ProtobufManager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1461">SCB-1461</a>] -         servicecomb.service.registry.client.workerPoolSize hasn&#39;t display the real role that it has announce by its name.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1462">SCB-1462</a>] -         Two properties has been required by fix SCB-1450.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1488">SCB-1488</a>] -         Upgrading protobuf version to 3.7.1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1492">SCB-1492</a>] -         Allow users to custom the ObjectMapper used in Swagger schema generation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1494">SCB-1494</a>] -         Optimizing log when starting a new microservice
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1515">SCB-1515</a>] -         use jdk 8 compiler for the Travis-CI of java-chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1516">SCB-1516</a>] -         Upgrade third-party dependency versions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1522">SCB-1522</a>] -         Add &quot;Why use Java Chassis&quot; introduction into README
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1523">SCB-1523</a>] -         Stopping retrying another server when no server available
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1524">SCB-1524</a>] -         support register schema when old schema already exists
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1525">SCB-1525</a>] -         print codec error stack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1528">SCB-1528</a>] -         Optimizing some code implementations
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1544">SCB-1544</a>] -         default metrics printer should not print 0 operations
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.2.1
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1088">SCB-1088</a>] -         SDK IsolationServerEvent is missing endpoint information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1251">SCB-1251</a>] -         reduce configuration inject callback
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1253">SCB-1253</a>] -         Adjust the priority of FailureHandler of the dispatchers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1260">SCB-1260</a>] -         inspector online test with servlet.urlPattern cause 404
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1266">SCB-1266</a>] -         ScbMarker work with log4j2 will cause log4j2 leak instance of Marker
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1280">SCB-1280</a>] -         Fix problem with nested generic list param like List&lt;List&lt;String&gt;&gt;
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1229">SCB-1229</a>] -         update the version of dependency
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1250">SCB-1250</a>] -         make ArchaiusUtils simpler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1259">SCB-1259</a>] -         response type support Optional
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1265">SCB-1265</a>] -         Add doc about maxHeaderSize configuration
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1246">SCB-1246</a>] -         EventBus subscriber support order
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1262">SCB-1262</a>] -         change 1.2.0-SNAPSHOT to 1.3.0-SNAPSHOT in pom.xml
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1263">SCB-1263</a>] -         forward request in edge should not inherit cse-context
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.2.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-353">SCB-353</a>] -         Servicecomb当前性能统计不支持时延分布的统计，这个对于业务有重要意义
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-837">SCB-837</a>] -         add http2 special configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-945">SCB-945</a>] -         enhance swagger to idl to support method parameter/result/List&lt;List&gt;/List&lt;Map&gt;/Map&lt;List&gt;/Map&lt;Map&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-946">SCB-946</a>] -         serialize/deseriaze List&lt;List&lt;X&gt;&gt;/List&lt;Map&lt;X, Y&gt;&gt;/Map&lt;X, List&lt;Y&gt;&gt;/Map&lt;X, Map&lt;Y, Z&gt;&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1071">SCB-1071</a>] -         serialize/deserialize array and primitives
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1144">SCB-1144</a>] -         change samples use log4j2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1153">SCB-1153</a>] -         provide traceId-invocationId by marker mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1162">SCB-1162</a>] -         document for PriorityProperty/InjectProperties/InjectProperty
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1175">SCB-1175</a>] -         document for basic configuration rule
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1188">SCB-1188</a>] -         provide a way to view/convert and download schemas
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-781">SCB-781</a>] -         关于apollo配置中心不支持@ConfigurationProperties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-968">SCB-968</a>] -         [SCB-968] http2 do not support pump download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1054">SCB-1054</a>] -         when download file, we should ignore consumer acceptType
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1065">SCB-1065</a>] -         when request not contain traceId,should use provider&#39;s invocation&#39;s traceId
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1066">SCB-1066</a>] -         when start error, destroy method may throw an exception lead to origin exception losed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1073">SCB-1073</a>] -         StaticMicroserviceVersions should be ignored while checking instance cache
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1088">SCB-1088</a>] -         SDK IsolationServerEvent is missing endpoint information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1089">SCB-1089</a>] -         Fix PrometheusPublisher naming error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1095">SCB-1095</a>] -         Timer task need catch all throwable to protected from unexpected error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1096">SCB-1096</a>] -         [SCB-1096]change the method calculate process cpu rate  to same with top
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1102">SCB-1102</a>] -         fix empty swagger and information leak problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1108">SCB-1108</a>] -         when timeout, the access log status is 200
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1109">SCB-1109</a>] -         local-service-registry sample of java-chassis can not run directly 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1114">SCB-1114</a>] -         upgrade zipkin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1115">SCB-1115</a>] -         fix not standard protostuff javadoc @Created
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1126">SCB-1126</a>] -         springmvc project generated by ServiceComb scaffold can not run
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1129">SCB-1129</a>] -         @JsonProperty on enum value is ignored
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1141">SCB-1141</a>] -         latest versionRule can not update to new version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1143">SCB-1143</a>] -         Servicecomb support watch service center with auth headers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1156">SCB-1156</a>] -         avoid collect wrong invocation stage data when rest invoke failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1191">SCB-1191</a>] -         NPE When return type is ResponseEntity&lt;Void&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1224">SCB-1224</a>] -         [SCB-1224] az affinity is conflict with empty instance protection
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1226">SCB-1226</a>] -         there are problems when request rejected by thread pool queue full
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1230">SCB-1230</a>] -         avoid throw exception in httpClientResponse.exceptionHandler
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1048">SCB-1048</a>] -         Provide a way to configure bootstrap information in Cloud Native enviroment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1061">SCB-1061</a>] -         Provide a way to using handlers(e.g. LoabalanceHanler) outside handler chain
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-674">SCB-674</a>] -         protobuf codec based on idl from swagger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1037">SCB-1037</a>] -         in vertx 3.6.0, PumpImpl do not support &quot;&quot;, it will throw exception
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1044">SCB-1044</a>] -         add current process CPU rate  and net packets in the metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1047">SCB-1047</a>] -         microservice.yaml  service_description.version support format xxx.xx.xxx.xxx
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1051">SCB-1051</a>] -         when interface set produces=text/plain;charset=utf-8. and consumers set accept = text/plain,will cause error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1056">SCB-1056</a>] -         Put provider QPS flow control in front
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1063">SCB-1063</a>] -         Improve the time cost when first time loading schema
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1068">SCB-1068</a>] -         As a developer want to know instance detail info when instance isolation 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1072">SCB-1072</a>] -         change dependency management version to project.version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1074">SCB-1074</a>] -         minor fixes for mistakes and logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1075">SCB-1075</a>] -         upgrade spring-framework to 4.3.20.RELEASE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1076">SCB-1076</a>] -         upgrade guava to 25.1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1077">SCB-1077</a>] -         upgrade hystrix to 1.5.12
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1079">SCB-1079</a>] -         allow consumer-id to be empty when query instance
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1101">SCB-1101</a>] -         ServiceComb-Java-Chassis support IPv6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1106">SCB-1106</a>] -         isolation must make sure one of instances is available
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1135">SCB-1135</a>] -         Add client max receive header size config item
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1139">SCB-1139</a>] -         Upgrade Vert.x to 3.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1146">SCB-1146</a>] -         update PR template
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1157">SCB-1157</a>] -         spring-boot2-starter-discovery and spring-boot-starter-discovery depend on zuul is not correct
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1170">SCB-1170</a>] -         improve log of upload directory during boot.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1177">SCB-1177</a>] -         update vertx to 3.6+ version to result .vertx directory was default created 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1178">SCB-1178</a>] -         In the unit test, the issue of assertEquals and Float.MAX_VALUE.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1179">SCB-1179</a>] -         Optimize the mainclass auto-discovery logic to cover more scenes.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1185">SCB-1185</a>] -         Log DNS related exception to help locate problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1186">SCB-1186</a>] -         add a common pom module to simplify user configurations
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1193">SCB-1193</a>] -         upgread spring boot versions and add easy to use dependency management
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1202">SCB-1202</a>] -         pump down with vertx3.6.3 no need to check buff length in AsynFileImpl#doWrite
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1205">SCB-1205</a>] -         improve edge forward http2 request
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1206">SCB-1206</a>] -         sort schemas in inspector ui
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1208">SCB-1208</a>] -         improve slow invocation logger: log remote address
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1210">SCB-1210</a>] -         improve the average latency precision of the metrics log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1211">SCB-1211</a>] -         avoid  create multiple caches for different expression of one versionRule 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1220">SCB-1220</a>] -         Support regex path param on consumer side
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1222">SCB-1222</a>] -         change groupId of &quot;hibernate-validator&quot; from &quot;org.hibernate&quot; to &quot;org.hibernate.validator&quot;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1239">SCB-1239</a>] -         close thread after finish unit test case at once.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1240">SCB-1240</a>] -         allowed one prometheus cluster support multiple apps
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-291">SCB-291</a>] -         delete old useless configuration mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-594">SCB-594</a>] -         Create a document description for https://github.com/apache/incubator-servicecomb-java-chassis/pull/704
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-638">SCB-638</a>] -         create mechanism for read config item by priority 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1046">SCB-1046</a>] -         file upload support file array for the same name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1062">SCB-1062</a>] -         Update the project development version to 1.2.0-SNAPSHOT
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1083">SCB-1083</a>] -         support test before provide service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1134">SCB-1134</a>] -         change default verticle instance count
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1136">SCB-1136</a>] -         change default settings of sync executor
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1147">SCB-1147</a>] -         log invocation stage trace information if too slow
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1148">SCB-1148</a>] -         read transport configuration from model
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1163">SCB-1163</a>] -         Support spring-cloud-gateway 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1165">SCB-1165</a>] -         filter bridge methods when generate swagger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1184">SCB-1184</a>] -         upgrade swagger from 1.5.12 to 1.5.22 to support convert swagger to html
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1192">SCB-1192</a>] -         add &quot;metrics&quot; prefix to slow invocation configuration 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1218">SCB-1218</a>] -         Prepare 1.2.0 Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1221">SCB-1221</a>] -         add missed modules to distribution and adjust orders
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1231">SCB-1231</a>] -         add queue meter of http client connection pool 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1232">SCB-1232</a>] -         make GroupExecutor configuration compatible to old version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1237">SCB-1237</a>] -         improve default thread pool strategy
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.1.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-493">SCB-493</a>] -         parameters and DefaultLogPublisher optimize
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-675">SCB-675</a>] -         generate protobuf idl from swagger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-681">SCB-681</a>] -         jackson protobuf support v3 specification: map/list/array
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-687">SCB-687</a>] -         highway server not accept too many connection
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-691">SCB-691</a>] -         add vertx server/ rest client/highway client/ highway server connection meter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-790">SCB-790</a>] -         support create new target microservice instance in one node
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-793">SCB-793</a>] -         run it-consumer during travis CI 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-842">SCB-842</a>] -         jackson protobuf serializer have performance problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-843">SCB-843</a>] -         add http client pool request time to consumer invocation meter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-881">SCB-881</a>] -         add more invocation stage measurement
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-894">SCB-894</a>] -         measure httpServer and httpClient
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-917">SCB-917</a>] -         parse proto file to model
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-918">SCB-918</a>] -         serialize/deserialize based on proto model
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-922">SCB-922</a>] -         collect Getter/Setter from pojo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-947">SCB-947</a>] -         delete old jackson protobuf logic
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-948">SCB-948</a>] -         convert proto model to string
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1001">SCB-1001</a>] -         [vertx] downloading, client disconnect first, should close WriteStream right now.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1021">SCB-1021</a>] -         add vertx client/server meters to metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1022">SCB-1022</a>] -         measure tcpServer and tcpClient
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1034">SCB-1034</a>] -         metrics performance optimize
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-74">SCB-74</a>] -         POJO static method is export as an operation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-381">SCB-381</a>] -         Fix foudation-vertx UT failure on linux
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-769">SCB-769</a>] -         When delay fault injection is enabled, the business thread will be blocked 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-774">SCB-774</a>] -         Unexpected warn log is printed while the service is exiting if there are reactive operations
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-780">SCB-780</a>] -         sessionstickrule add the judgement of whether lastServer can also be accessed.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-787">SCB-787</a>] -         Server States not clean unavailable server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-794">SCB-794</a>] -         Edge invocation do not properly send servlet filter response code
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-799">SCB-799</a>] -         fix problem about &quot;mvn install&quot; in ubuntu
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-800">SCB-800</a>] -         Param order generated by BeanParamAnnotationProcessor is not stable
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-802">SCB-802</a>] -         in rollback scenario, old versions meta is used and invocation is fail
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-810">SCB-810</a>] -         fix zipkin dependency
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-828">SCB-828</a>] -         In some tomcat implementation inputstream available is null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-845">SCB-845</a>] -         some times download file can not get correct content
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-849">SCB-849</a>] -         refactor producer connection limit using vertx metrics spi mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-861">SCB-861</a>] -         lost response type of @ApiResponse 490/590
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-886">SCB-886</a>] -         Path param is not encoded and decoded correctly
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-888">SCB-888</a>] -         switch SCBEngine status to up in the wrong time
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-895">SCB-895</a>] -         When json parse fail will not get 400 but 590
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-898">SCB-898</a>] -         Governance function is not effective when configuration Start with servicecomb
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-904">SCB-904</a>] -         SpringMVC @RequestHeader do not support value,only support name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-905">SCB-905</a>] -         Request connection is hang up when request path contains illegal string
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-910">SCB-910</a>] -         Java Chassis support spring boot 2.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-956">SCB-956</a>] -         not support body to be a enum
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-959">SCB-959</a>] -         When parsing inner classes，CtType will throw NotFoundException
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-960">SCB-960</a>] -         when consumer local failed(eg: LB failed), CompletableFuture callback can not get InvocationContext
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-964">SCB-964</a>] -         Fix MediaType setting problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-965">SCB-965</a>] -         resolve DoS attack problem about enum/char/Character/byte/Byte/short/Short/int/Integer/long/Long/float/Float/double/Double
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-972">SCB-972</a>] -         Using SHA1 signature key as UUID of micro service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1007">SCB-1007</a>] -         not support CustomGeneric&lt;Map&lt;KEY, VALUE&gt;&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1012">SCB-1012</a>] -         add NoRouteToHostException in retry&#39;s exception
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1014">SCB-1014</a>] -         Fix priority problem of ExceptionToResponseConverter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1043">SCB-1043</a>] -         MicroserviceVersions.safeSetInstances lost exception message
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1045">SCB-1045</a>] -         fix sample spring bean declaring
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-215">SCB-215</a>] -         support annotation ApiParam
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-775">SCB-775</a>] -         support invoke service using raw type like JsonObject
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-777">SCB-777</a>] -         Support @BeanParam annotation in JAX-RS developing style
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-778">SCB-778</a>] -         In tomcat, support register swagger base path with container prefix
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-786">SCB-786</a>] -         when instances cache is not sync to SC caused by bug, auto fix it.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-788">SCB-788</a>] -         public key black/white add feature: choose server by microservice field  and properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-847">SCB-847</a>] -         Provide a way to decode user&#39;s custom error data
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-880">SCB-880</a>] -         Give an option to query parameter convert empty to null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-903">SCB-903</a>] -         Add a feature to serialize/deserialize using Object to avoid information lose
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-926">SCB-926</a>] -         Invoke 3rd party service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-936">SCB-936</a>] -         Encoded slash &#39;/&#39; is decoded in EdgeService, causing 404 error response
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-967">SCB-967</a>] -         support configed ip send request
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1009">SCB-1009</a>] -         Supporting configure encrypted password for proxy settings
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1040">SCB-1040</a>] -         Support discover instances from ServiceCenter Aggregator
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-206">SCB-206</a>] -         Support @Api to specify produces and consumes
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-711">SCB-711</a>] -         HTTP2 and other client should be lasy initialized 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-747">SCB-747</a>] -         add jaxrs upload file demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-795">SCB-795</a>] -         update jackson from 2.9.5 to 2.9.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-827">SCB-827</a>] -         Add response decode error log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-832">SCB-832</a>] -         modify the errorThresholdPercentage from 20 to 0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-833">SCB-833</a>] -         Provide a retry mechanism to meet upgrade no interrupt
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-870">SCB-870</a>] -         Refractor loadbalancer rule to not use IRule to give more control
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-873">SCB-873</a>] -         Make the validation result display the parameter name instead of arg0, arg1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-887">SCB-887</a>] -         aysnc servlet timeout is too short and may block container pool when tasks are timeout
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-889">SCB-889</a>] -         add SCBEngine reference to BootEvent
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-897">SCB-897</a>] -         Support config rest server max initial line length
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-911">SCB-911</a>] -         Timeout scenario print too many logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-931">SCB-931</a>] -         upgrade vert.x to fix some know issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-933">SCB-933</a>] -         Revert changes to RestObjectMapper that fail on primitive types not present
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-943">SCB-943</a>] -         make ProduceJsonProcessor,DefaultHttpClientFilter,ServerRestArgsFilter changable
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-954">SCB-954</a>] -         improve consumer stage time record when failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-961">SCB-961</a>] -         Isolation provide a way to isolate for at least a moment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-975">SCB-975</a>] -         Improve retry rule
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-979">SCB-979</a>] -         Add reminder log on the selection of SwaggerGeneratorContext
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-982">SCB-982</a>] -         Show the warning message in maven compile plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-985">SCB-985</a>] -         Add springboot2-starter-discovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-986">SCB-986</a>] -         ServerInstances can be cached in spring-boot2-starter-discovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-987">SCB-987</a>] -         delete spring 3 related declaring
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-989">SCB-989</a>] -         scan RestController to to make springmvc controller publish as ServiceComb Rest easier
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-996">SCB-996</a>] -         When retries fail, return the last error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1020">SCB-1020</a>] -         No need unregister when bootup failure before register service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1031">SCB-1031</a>] -         The Response&#39;s properties was overrided wrong between @APIOperation and @Resoponse on the controller method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1038">SCB-1038</a>] -         Fix some bugs and logs improvement reported by users when testing
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-612">SCB-612</a>] -         delete useless MicroserviceMetaManager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-736">SCB-736</a>] -         generate default value to swagger for primitive type, even there is no defaultValue annotation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-854">SCB-854</a>] -         BootListener support load by not only spring bean, but also SPI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-859">SCB-859</a>] -         generate traceId when create invocation for consumer/producer/edge
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-882">SCB-882</a>] -         split mixed integration test case
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-893">SCB-893</a>] -         measure vertx by vertx metrics mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-906">SCB-906</a>] -         add sample for invocation apm by java agent
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-919">SCB-919</a>] -         generate lambda Getter/Setter from reflect method or field to improve performance
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-920">SCB-920</a>] -         Remove duplicate dependencies
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-921">SCB-921</a>] -         check if swagger compatible to protobuf and choose transport automatically
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-928">SCB-928</a>] -         support swagger &quot;collection-format&quot; feature
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-944">SCB-944</a>] -         make control IT deploy simpler and print less log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-957">SCB-957</a>] -         delete too old protobuf map compatible flag
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-992">SCB-992</a>] -         Synchronous open source code from Vert.x 3.5.3 version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1023">SCB-1023</a>] -         switch max connection limitation to metrics mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1035">SCB-1035</a>] -         Update third party licenses for java-chassis
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.0.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-651">SCB-651</a>] -         QPS rate limit bug
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-662">SCB-662</a>] -         Using cse/servicecomb duplicate key will get list of values
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-666">SCB-666</a>] -         Test failure on system that have rotate option set in /etc/resolv.conf
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-696">SCB-696</a>] -         [AccessLog] If nginx send requests via short-lived connections, %v will print &quot;0.0.0.0&quot;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-699">SCB-699</a>] -         add schemaIds field in register.yaml when mock the Local sevice-center
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-703">SCB-703</a>] -         When consumer invoke void type method in RPC style, an exception is thrown
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-705">SCB-705</a>] -         When consumer invoke an unregistered provider, it will never find this provider even the provider is registered later
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-753">SCB-753</a>] -         NPE when query not exists service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-754">SCB-754</a>] -         Check null invocation in AbstractRestInvocation to avoid unexpected NPE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-759">SCB-759</a>] -         Fix ServiceComb version error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-772">SCB-772</a>] -         Java Chassis::Handlers::Loadbalance test failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-773">SCB-773</a>] -         Java Chassis::Core test failed
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-616">SCB-616</a>] -         Make access log mechanism extensible
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-640">SCB-640</a>] -         Add black/white list support based on public key handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-679">SCB-679</a>] -         Support Cross-Origin Resource Sharing (CORS)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-708">SCB-708</a>] -         Support assembling query param into Object parameter(in Spring MVC developing style)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-752">SCB-752</a>] -         User can switch off outputting merged log4j property file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-760">SCB-760</a>] -         provide a way to invoke service with full path
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-194">SCB-194</a>] -         Improve component-scan setting
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-661">SCB-661</a>] -         Logs improvement to give better information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-671">SCB-671</a>] -         Duplicate cse.xxx to servicecomb.xxx to work better in future
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-684">SCB-684</a>] -         Following swagger conventions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-685">SCB-685</a>] -         Service comb chassis must support default values
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-697">SCB-697</a>] -         Service comb chassis must support JAX-RS @DefaultValue
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-700">SCB-700</a>] -         Check server status when choose an available server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-701">SCB-701</a>] -         RequestBody(required = false) and when requestBody is null then exception observed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-702">SCB-702</a>] -         Deleted unwanted json-lib maven dependency for foundation-config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-706">SCB-706</a>] -         refactor loadbalance filters logic to support invocation based filter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-712">SCB-712</a>] -         Do not register service path to service center when not necessary
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-713">SCB-713</a>] -         @DefaulValue should be set only when input param is null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-715">SCB-715</a>] -         Working in thread that do not have context class loader
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-727">SCB-727</a>] -         Java Chassis-Local generated schema and service center schema are different while registering the service then print the difference content
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-750">SCB-750</a>] -         Dependency management is incomplete in Saga and Java-Chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-755">SCB-755</a>] -         [SCB-755] 755 Duplicate copy cse config to Servicecomb config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-763">SCB-763</a>] -         Simplify Dynamic Config (Apollo) Integration Test in Java Chassis
+</li>
+</ul>
+
+<h2>        Wish
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-746">SCB-746</a>] -         Update Chassis from m1 to m2 in start.servicecomb.io
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-506">SCB-506</a>] -         Report the service governance event 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-693">SCB-693</a>] -         registry microservice failed if get host address failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-725">SCB-725</a>] -         support get main class package when run with &quot;java -jar xxx.jar&quot;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-726">SCB-726</a>] -         edge support convert from form-data or x-www-form-urlencoded to json automatically
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-728">SCB-728</a>] -         add decrypt/signature/... to edge demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-729">SCB-729</a>] -         check if instance cache equals to SC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-733">SCB-733</a>] -         open handlerContext for business logic, and add a new name: localContext
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-738">SCB-738</a>] -         delete microservice from MicroserviceManager after it not exist in SC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-762">SCB-762</a>] -         resolve eclipse compile warnings
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.0.0-m2
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-137">SCB-137</a>] -         Add new dimension of transport way for all Consumer/Producer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-196">SCB-196</a>] -         Add metrics for each consumer/provider handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-203">SCB-203</a>] -         servlet rest support file upload
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-252">SCB-252</a>] -         Metrics support overwatch Integration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-370">SCB-370</a>] -         Metrics timer (like latency) output precision must to nano level not milli level
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-383">SCB-383</a>] -         metrics subscribe invocation life event and do statistics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-384">SCB-384</a>] -         provide invocation performance log publisher
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-385">SCB-385</a>] -         metrics publisher switch to new mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-422">SCB-422</a>] -         add executor metrics, not just queue size
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-440">SCB-440</a>] -         Provide Maven Archetype of business-service-pojo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-441">SCB-441</a>] -         Provide Maven Archetype of business-service-jaxrs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-442">SCB-442</a>] -         Provide Maven Archetype of business-service-springmvc
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-445">SCB-445</a>] -         delete old metrics mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-446">SCB-446</a>] -         metrics-prometheus switch to new mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-450">SCB-450</a>] -         documents for metrics initializer/publisher, and how to extend
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-462">SCB-462</a>] -         cloud eye publisher switch to new mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-470">SCB-470</a>] -         Provide Maven Archetype of business-service-spring-boot-starter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-484">SCB-484</a>] -         servlet rest support download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-485">SCB-485</a>] -         jaxrs mode support file download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-486">SCB-486</a>] -         edge support route file download invocation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-487">SCB-487</a>] -         consumer support download file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-494">SCB-494</a>] -         support delete temp file after download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-501">SCB-501</a>] -         document for download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-527">SCB-527</a>] -         Reorganization All Archetype For Enable Auto Publish
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-529">SCB-529</a>] -         producer download file from byte[]
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-531">SCB-531</a>] -         x-java-interface change from require to optional
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-532">SCB-532</a>] -         support recursive dependence
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-533">SCB-533</a>] -         javassistUtils create class from CtClass, not only JavaType
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-534">SCB-534</a>] -         generic class generate optimize
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-538">SCB-538</a>] -         create SwaggerToClassGenerator to convert swagger to class
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-540">SCB-540</a>] -         Delete archetypes from java-chassis-dependencies
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-72">SCB-72</a>] -         Can isolation information of provider and consumer been discovered through capability of release and subscription?
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-449">SCB-449</a>] -         Typo in LICENSE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-455">SCB-455</a>] -         Base on 1.0.0-m2-SNAPSHOT version, execution of the metrics UT failed 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-474">SCB-474</a>] -         使用zuul做网关进行路由，当同一个微服务接口同时开放rest和highway方式时，出现无法调用情况。
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-481">SCB-481</a>] -         Fix qps handler assertion errors when schemaid or microservice name contails . (dot)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-490">SCB-490</a>] -         Service Center verrsion is not forward compatible and needs to be noted in releasenote.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-495">SCB-495</a>] -         Compile java-chassis 1.0.0-m2-SNAPSHOT failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-502">SCB-502</a>] -         logs日志没有输出
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-503">SCB-503</a>] -         When using WeighedResponseTimeRule, there are some initialize and stateless access problems
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-507">SCB-507</a>] -         poll task in MetricsBootstrap did not really measure meters
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-512">SCB-512</a>] -         download support chinese file name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-516">SCB-516</a>] -         AccessLog of EdgeService does not print traceId
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-520">SCB-520</a>] -         resolve service with env re-registered will fail
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-521">SCB-521</a>] -         change the priority of ServiceComb config and SpringBoot config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-562">SCB-562</a>] -         Java Chassis will throw NPE when producer impl do not contain any method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-567">SCB-567</a>] -         treat warning as errors, modify the compilerArgments
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-579">SCB-579</a>] -         NullPointerException is thrown when consumer upload null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-580">SCB-580</a>] -         When upload file size exceeds limitation of provider, consumer will return a confusing response
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-587">SCB-587</a>] -         Fix archetypes readme
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-588">SCB-588</a>] -         Set archetypes sourceEncoding to UTF-8
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-591">SCB-591</a>] -         configcenter need to do encode
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-593">SCB-593</a>] -         Change log level to remind user to specify loadbalance handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-597">SCB-597</a>] -         update spring boot version from 1.4.5 to 1.5.12 in starter archetype
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-617">SCB-617</a>] -         graceful shutdown with standalone tomcat
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-652">SCB-652</a>] -         Fix schema registry environment configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-653">SCB-653</a>] -         When provider returns Transfer-Encoding header and Edge will cause problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-654">SCB-654</a>] -         DiscoveryTree has concurrency problems.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-656">SCB-656</a>] -         When provider returns non 200 code Edge Service will all convert to 502
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-658">SCB-658</a>] -         leak of MicroserviceVersions register to EventBus
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-659">SCB-659</a>] -         Fix build failed in Springmvc Integration Test
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-667">SCB-667</a>] -         gracefully shutdown is not work in some case
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-6">SCB-6</a>] -         ServiceComb Java Chassis Metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-136">SCB-136</a>] -         Improvement and New Features of Java Chassis Metrics in version 1.0.0-m2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-201">SCB-201</a>] -         As a SDK user, I want to send file/stream data so that I can use ServiceComb to handle the music or image data
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-257">SCB-257</a>] -         As a developer, I want to download file from microservice
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-292">SCB-292</a>] -         As a developer, I want to use annotation to validate input parameter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-406">SCB-406</a>] -         Chassis must support standard parameter validation handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-439">SCB-439</a>] -         Provide Maven Archetypes in Java Chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-482">SCB-482</a>] -         Http2 support for java chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-582">SCB-582</a>] -         Provide a way to protection for instance removal
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-607">SCB-607</a>] -         Support printing invocation context in access log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-611">SCB-611</a>] -         Provide a default Edge service dispatcher to make developer edge easy
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-350">SCB-350</a>] -         Vertx ssl file config error execption approvement
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-355">SCB-355</a>] -         As a operator, when sdk config a fault ak/sk on HuaweiCloud, then will auth token fail, but it continues to register, will cause may fault in server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-373">SCB-373</a>] -         As a developer, i want to do something around serialize/deserialize, so that we should make a  aspect to eanable others can do this work
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-431">SCB-431</a>] -         Add Rat check on the travis CI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-444">SCB-444</a>] -         try to optimize autodiscovery function
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-447">SCB-447</a>] -         optimize SPIServiceUtils to avoid get different instance for the same type
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-467">SCB-467</a>] -         Contributing &amp; Reporting Issues in java-chassis README.md is not direct to any contents
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-477">SCB-477</a>] -         sdk guava‘s version need to update from 16.0.1 to 19.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-488">SCB-488</a>] -         Retry/Metrics some default behavior cause unnecessary retry and logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-498">SCB-498</a>] -         Configuration Center IP Addresses need to meet general specifications
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-514">SCB-514</a>] -         update pom and code, so that we can treat warnings as errors
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-517">SCB-517</a>] -         service center starter for spring boot/cloud improvement
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-518">SCB-518</a>] -         ServiceCenter ip address need to config default port
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-523">SCB-523</a>] -         maven-remote-resource-plugin execute very slow
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-526">SCB-526</a>] -         When creating dynamic configuration, we need to fetch once for the configuration when startup
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-543">SCB-543</a>] -         optimize registry procedure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-546">SCB-546</a>] -         As a developer, want to reregistry schemas in the dev environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-548">SCB-548</a>] -         Support Gracefully Shutdown
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-570">SCB-570</a>] -         reformat  everything
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-575">SCB-575</a>] -         Publish the Java doc of ServiceComb projects
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-576">SCB-576</a>] -         javassist License file need to be updated
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-585">SCB-585</a>] -         Add ServiceComb-java-chassis reference guide to project
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-625">SCB-625</a>] -         ProduceProcessor use SPI to support extends
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-627">SCB-627</a>] -         Java Chassis- Client Request Timeout support for operation/schema/service level
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-636">SCB-636</a>] -         As a OM staff, i want to use the lb endpoint as the servicecenter/configcenter address config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-646">SCB-646</a>] -         if local swagger exists, not generate swagger according to class
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-649">SCB-649</a>] -         when port can&#39;t been listened,log warn and show more detail message
+</li>
+</ul>
+
+<h2>        Wish
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-504">SCB-504</a>] -         Upgrade to Spring boot 1.5.12.RELEASE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-515">SCB-515</a>] -          change all configuration from &#39;cse.xxx&#39; to &#39;servicecomb.xxx&#39;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-672">SCB-672</a>] -         Edge Service support calls from different ApplicationIds
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-673">SCB-673</a>] -         Edge Service support calls from different ApplicationIds
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-324">SCB-324</a>] -         Chassis must support network failure simulation, so that I can developers can enhance the robustness of the app
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-352">SCB-352</a>] -         Support operation level flow control on provider side
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-354">SCB-354</a>] -         metrics上报的统计数据可能需要支持加上业务自己的维度，方便统计分析，比如APP版本，机型等，业务可以把参数作为invocation参数传递到框架，需要框架支持
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-420">SCB-420</a>] -         Change default HTTP header length restriction to 32K
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-424">SCB-424</a>] -         Get configuration interface to add header: x-environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-443">SCB-443</a>] -         Fix randomly UT failure of TestProviderQpsFlowControlHandler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-453">SCB-453</a>] -         Read configuration from application.yml/application.properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-456">SCB-456</a>] -         Provider a way to input configuration from a Map, instead of  micreservice.yaml
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-457">SCB-457</a>] -         Verify if gradle can manage the ServiceComb java Chassis jars in a remote or local maven repository
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-471">SCB-471</a>] -         vertx upgrade causes use config center push mode error 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-542">SCB-542</a>] -         Update netty&#39;s version to 4.1.24
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-589">SCB-589</a>] -         allow consumer upgrade before producer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-590">SCB-590</a>] -         Update the validator version to latest(6.0.2)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-595">SCB-595</a>] -         Compatible with old SC versions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-599">SCB-599</a>] -         Service registry failed when service before Service Center start
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-601">SCB-601</a>] -         ServiceComb integrated to spring boot or tomcat will print too many logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-637">SCB-637</a>] -         enhance HttpServletRequestEx impl
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-647">SCB-647</a>] -         Update LICENSE/NOTICE for release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Java-Chassis-1.0.0-m1
+</code></pre></div></div>
+
+<h3 id="major-improvements">Major improvements:</h3>
+
+<ul>
+  <li>
+    <p>Java Chassis can now use Apollo as configuration center. Users can now
+change configurations like load balancing policy and those changes will
+come into effect on the fly.
+See <a href="http://servicecomb.incubator.apache.org/users/dynamic-config/">here</a> for more
+details.</p>
+  </li>
+  <li>
+    <p>Metrics was re-factored. We now uses events for collecting invocation data
+instead of Hystrix. This reduces the performance penalty of computing
+metrics.
+Metrics can now be fetched via ‘/metrics’ using HTTP.
+See <a href="http://servicecomb.incubator.apache.org/users/metrics-in-1.0.0-m1/">here</a> for
+more details.</p>
+  </li>
+</ul>
+
+<h3 id="other-noticeable-changes">Other Noticeable Changes:</h3>
+
+<ul>
+  <li>The Java Chassis libraries are now under group “org.apache.servicecomb”.</li>
+  <li>We provide out of the box metrics support now. Prometheus is supported.</li>
+  <li>Configuration center was re-factored and moved out from foundation.
+Support for Apollo was added.</li>
+  <li>Users can now use Object type for calling services.</li>
+  <li>Users can now use Generics for calling services.</li>
+  <li>Better integration with Spring MVC.</li>
+  <li>Upgraded to zipkin2 internally, Java Chassis can now work with zipkin
+server v1 and v2.</li>
+  <li>We are in the process of supporting reactive programming. Pojo consumer
+and provider now supports CompletableFuture.</li>
+</ul>
+
+<h3 id="for-more-detailed-information-please-checkout-here">For more detailed information please checkout <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342351">here</a></h3>
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+                
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+            
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+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
+          
+            
+            
+            <a href=/release/kie-downloads/>English</a>
+          
+        </div>
+      </nav>
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+</div>
+
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+    
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+  
+  <div class="sidebar sticky">
+      
+      <div class="back-to-home"><a href="/cn/">首页</a> > ServiceComb Kie Downloads</div>
+      
+  
+  
+    
+      
+      
+      
+    
+    
+      
+
+<nav class="nav__list">
+  
+  <input id="ac-toc" name="accordion-toc" type="checkbox" />
+  <label for="ac-toc">切换菜单</label>
+  <ul class="nav__items">
+    
+      <li>
+        
+          <span class="nav__sub-title">Service-Center</span>
+        
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+          
+            
+            
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+            
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+            <li><a href="/cn/release/java-chassis-downloads/" class="">发布包</a></li>
+          
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+      <li>
+        
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+        
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+</nav>
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+  </div>
+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Kie Downloads">
+    <meta itemprop="description" content="ServiceComb Kie Downloads">
+    
+    <meta itemprop="dateModified" content="September 09, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Kie Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Windows</th>
+      <th>Linux</th>
+      <th>Darwin</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Kie 0.1.0 (LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-src.tar.gz">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-src.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，
+请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。
+建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/" target="_blank">目录</a> 中获取这些文件，
+而不是从镜像中获取这些文件。</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+ or
+ pgpk -a KEYS
+ or
+ pgp -ka KEYS
+</code></pre></div></div>
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-kie-********.asc apache-servicecomb-kie-*********
+or
+pgpv apache-servicecomb-kie-********.asc
+or
+pgp apache-servicecomb-kie-********.asc
+</code></pre></div></div>
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/" target="_blank">仓库</a> 下载SHA签名并使用sha512sum验证。</p>
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content/cn/release/kie-release-notes/index.html

diff --git a/content/cn/release/kie-release-notes/index.html b/content/cn/release/kie-release-notes/index.html
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+    
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+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
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+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version kie-0.1.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1313">SCB-1313</a>] -         Fix the go debug error in goland
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1538">SCB-1538</a>] -         Servicecomb-kie&#39;s dependency licenses are necessary for the binary release. 
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1333">SCB-1333</a>] -         support delete key
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1396">SCB-1396</a>] -         add service name in rest api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1479">SCB-1479</a>] -         kie documentation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1480">SCB-1480</a>] -         support arm64
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1482">SCB-1482</a>] -         support yaml request to put a key value
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1500">SCB-1500</a>] -         decouple mongodb, use mongodb storage as a plugin
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1311">SCB-1311</a>] -         Redesign database to make service faster and more ease of use
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1312">SCB-1312</a>] -         Create CI for servicecomb-kie
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1325">SCB-1325</a>] -         Refactoring the delete function
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1331">SCB-1331</a>] -         mongodb TLS communication
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1534">SCB-1534</a>] -         Upgrade go chassis, eliminate cross dependency
+</li>
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+            <li><a href="/cn/release/kie-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Java-Chassis</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
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+            <li><a href="/cn/release/java-chassis-release-notes/" class="">发布说明</a></li>
+          
+            
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+            <li><a href="/cn/release/java-chassis-downloads/" class="">发布包</a></li>
+          
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+    
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+        
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+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Mesher Downloads">
+    <meta itemprop="description" content="ServiceComb Mesher Downloads">
+    
+    <meta itemprop="dateModified" content="September 09, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Mesher Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Windows</th>
+      <th>Linux</th>
+      <th>Darwin</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Mesher 1.6.3 (LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-src.tar.gz">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-src.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-windows-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-linux-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-darwin-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，
+请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。
+建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/" target="_blank">目录</a> 中获取这些文件，
+而不是从镜像中获取这些文件。</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-mesher-********.asc apache-servicecomb-mesher-*********
+
+or
+
+pgpv apache-servicecomb-mesher-********.asc
+
+or
+
+pgp apache-servicecomb-mesher-********.asc
+
+
+</code></pre></div></div>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/" target="_blank">仓库</a> 下载SHA签名并使用sha512sum验证。</p>
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content/cn/release/mesher-release-notes/index.html

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@@ -0,0 +1,685 @@
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+    
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+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version mesher-1.6.3
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1410">SCB-1410</a>] -         mesher config for tracing didn&#39;t work.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1415">SCB-1415</a>] -         mesher relies on go-chassis/go-chassis-plugins.But go-chassis-plugins can not compile because of dependent packages missing 
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1477">SCB-1477</a>] -         add release script to release mesher
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1404">SCB-1404</a>] -         GRPCDefaultDestinationResolver name was miswritten as GPRCDefaultDestinationResolver.
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+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack Downloads
+</h1>
+            
+          </header>
+        
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+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>版本号</th>
+      <th>源码</th>
+      <th>发布包</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Pack 0.5.0(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Pack 0.4.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Pack 0.3.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong>
+使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。
+建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/" target="_blank">目录</a>中获取这些文件，而不是从镜像中获取这些文件。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-pack********.asc apache-servicecomb-pack-*********
+
+or
+
+pgpv apache-servicecomb-pack-********.asc
+
+or
+
+pgp apache-servicecomb-pack-********.asc
+
+
+</code></pre></div></div>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/" target="_blank">仓库</a>下载SHA签名并使用sha512sum验证。</p>
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content/cn/release/pack-release-notes/index.html

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+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Pack Release Notes">
+    <meta itemprop="description" content="ServiceComb Pack Release Notes">
+    
+    <meta itemprop="dateModified" content="April 06, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version pack-0.5.0
+</code></pre></div></div>
+
+<h2> New and Noteworthy </h2>
+<ul>
+    <li> Provided new Saga Transaction tracking system based on Akka Actor</li>
+    <li> Provided a new GUI to check the Saga Transactions</li>
+    <li> User can use TransactionContext to pass the transaction id information </li>
+  </ul>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1372">SCB-1372</a>] -         Collection state machine health to metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1374">SCB-1374</a>] -         Implement Alpha Event Channel Plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1379">SCB-1379</a>] -         Add alpha benchmark tool document
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1416">SCB-1416</a>] -         Refactoring the core part of alpha-fsm module  to move to alpha-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1417">SCB-1417</a>] -         Alpha Event Redis Channel Plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1418">SCB-1418</a>] -         Alpha Event Kafka Channel Plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1435">SCB-1435</a>] -         State machine manual
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1439">SCB-1439</a>] -         Optimize class ElasticsearchTransactionRepository persistence parameters
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1442">SCB-1442</a>] -         Topic initialization  &amp; Class KafkaMessagePublisher needs to use globalTxId as the partitioning strategy.
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1264">SCB-1264</a>] -         When setting server.port and alpha.server.port random port is missing the default tag configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1281">SCB-1281</a>] -         saga-frontend access alpha restful API has cross-domain issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1352">SCB-1352</a>] -         Fixed a typo on ParametersContext class in servicecomb-pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1377">SCB-1377</a>] -         The Notice file of ServiceComb-Pack need to updated
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1419">SCB-1419</a>] -         ElasticsearchTransactionRepositoryTest failed for CI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1421">SCB-1421</a>] -         ElasticsearchTransactionRepositoryTest failed for CI 2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1438">SCB-1438</a>] -         Class ElasticsearchTransactionRepository synchronization save method is invalid
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1349">SCB-1349</a>] -         support Nacos Discovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1386">SCB-1386</a>] -         Support to send out SagaEnd event in other method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1411">SCB-1411</a>] -         Add alpha-ui module to provide a simple Web GUI
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-575">SCB-575</a>] -         Publish the Java doc of ServiceComb projects
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1243">SCB-1243</a>] -         Keep the handler name of saga-consumer and saga-producer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1247">SCB-1247</a>] -         Set default value in alpha.cluster.address on omega side
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1272">SCB-1272</a>] -         Improvement Omega timeout processing, interrupt request thread after the timeout
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1279">SCB-1279</a>] -         add omega context verification
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1299">SCB-1299</a>] -         Showing the type,createtime in the Saga UI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1309">SCB-1309</a>] -         ServicePack CI build should use sprint-boot-2 profile
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1380">SCB-1380</a>] -         Upgrade Java-Chassis version to 1.2.1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1381">SCB-1381</a>] -         Add common api controller to bridge the request of transaction data querying and metrics data querying
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1385">SCB-1385</a>] -         Provide a common way to pass GID and LID
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1387">SCB-1387</a>] -         Upgrade Spring Boot version to 2.1.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1391">SCB-1391</a>] -         Add support for explicit tx context passing for TCC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1395">SCB-1395</a>] -         Switch to openjdk in servicecomb-pack CI build
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1399">SCB-1399</a>] -         Drop the support of Spring Boot 1.x for ServiceComb-Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1432">SCB-1432</a>] -         fix deprecated api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1443">SCB-1443</a>] -         Adding a Rolling File Appender for Log4j2
+</li>
+</ul>
+
+<h2>        Test
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1397">SCB-1397</a>] -         Acceptance test about Byteman error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1403">SCB-1403</a>] -         byteman port configuration conflicts in all acceptance tests.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1423">SCB-1423</a>] -         Non-thread-safe method size of ConcurrentLinkedQueue in AlphaIntegrationTest
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1026">SCB-1026</a>] -         Saga compensation should support to define the retry times
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1238">SCB-1238</a>] -         Introductory article on cluster implementation of ServiceComb Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1241">SCB-1241</a>] -         Update how to use mysql document
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1244">SCB-1244</a>] -         Update the configuration of Pack 0.4.0 in the user guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1298">SCB-1298</a>] -         Add Zookeeper as the Alpha server load balancer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1314">SCB-1314</a>] -         support zookeeper user_guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1335">SCB-1335</a>] -         Upgrade docker-compose file to 3.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1353">SCB-1353</a>] -         Travis CI should fail fast
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1356">SCB-1356</a>] -         add NACOS to DiscoveryType
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1389">SCB-1389</a>] -         Doc for SCB-1385
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1430">SCB-1430</a>] -         Update the License file of ServiceComb Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1440">SCB-1440</a>] -         Remove the Kamon dependencies
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version pack-0.4.0
+</code></pre></div></div>
+
+<h2> New and Noteworthy </h2>
+<ul>
+   <li> Provides Alpha HA implementation </li>
+   <li> Support to use eureka or consul to do the service discovery of Alpha</li>
+   <li> Fix the event scanner thread exit issue </li>
+  </ul>
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1180">SCB-1180</a>] -         Unable to register eureka instance metadata on random gRPC port
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1187">SCB-1187</a>] -         Update distribution LICENSE for Spring Cloud Starter Netflix
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1200">SCB-1200</a>] -         Omega with consul
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1201">SCB-1201</a>] -         alpha-spring-cloud-starter rename alpha-server-cloud-eureka-starter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1204">SCB-1204</a>] -         acceptance tests with consul
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1209">SCB-1209</a>] -         Add a description about the integrated consul
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1118">SCB-1118</a>] -         EventScanner should catch the exception to keep it running.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1159">SCB-1159</a>] -         Rxjs and TypeScript version compatibility issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1216">SCB-1216</a>] -         Alpha Cluster support random gRPC port
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1217">SCB-1217</a>] -         Consul support random gRPC port
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-15">SCB-15</a>] -         service discovery with popular open source service registry
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1155">SCB-1155</a>] -         Generate a random free gRPC port to launch alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1199">SCB-1199</a>] -         service discovery with consul
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1082">SCB-1082</a>] -         Dependency-free-transaction-demo failed on Mac OSX
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1099">SCB-1099</a>] -         Add nexus SNAPSHOT information to the README repo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1100">SCB-1100</a>] -         Updated the user guide for migration from saga 0.2.x
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1103">SCB-1103</a>] -         TCC should have participate started and ended events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1110">SCB-1110</a>] -         omega-transport-feign configure file error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1119">SCB-1119</a>] -         Add the order number on the demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1121">SCB-1121</a>] -         Clean up the OmegaContext once the invocation is over
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1122">SCB-1122</a>] -         Specify the name of RestTemplate in the configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1124">SCB-1124</a>] -         Rename the Handler name of Omega transport
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1125">SCB-1125</a>] -         Add omega instanceid to properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1127">SCB-1127</a>] -         Support alpha server registering to Spring Cloud Eureka
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1128">SCB-1128</a>] -         Omega get Alpha address from Spring Cloud Eureka
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1130">SCB-1130</a>] -         Alpha cluster need distributed lock function
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1158">SCB-1158</a>] -          External jars support Alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1160">SCB-1160</a>] -         SCB-1142 additional
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1171">SCB-1171</a>] -         Improve unit test coverage for ClusterLockServiceTest
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1235">SCB-1235</a>] -         Clean up third party license with maven plugin
+</li>
+</ul>
+
+<h2>        Test
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-306">SCB-306</a>] -         [pack] acceptance tests with all the transaction scenarios
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1152">SCB-1152</a>] -         About abortTimeoutTxStartedEvent test case failed
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1151">SCB-1151</a>] -         Add Eureka instructions in the user guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1161">SCB-1161</a>] -         Eureka integration english guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1181">SCB-1181</a>] -         Add mvn wrap script to lock the maven version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1182">SCB-1182</a>] -         Also need to use -Pspring-boot-2 by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1189">SCB-1189</a>] -         Update the Eureka Integration User Guide for version 0.4.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1190">SCB-1190</a>] -         Update the mysql manual for use extension jar description
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1194">SCB-1194</a>] -         Specify alphaEventBus bean with @Qualifier(&quot;alphaEventBus&quot;)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1195">SCB-1195</a>] -         About typo in eureka Integrated documentation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1215">SCB-1215</a>] -         Update document about alpha cluster
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1233">SCB-1233</a>] -         Alpha Server should not include eureka dependencies by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1238">SCB-1238</a>] -         Introductory article on cluster implementation of ServiceComb Pack
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version pack-0.3.0
+</code></pre></div></div>
+<h2> New and Noteworthy </h2>
+<ul>
+   <li> Provides the TCC support </li>
+   <li> Rename the package name from "org.apache.servicecomb.saga" to "org.apache.servicecomb.pack"</li>
+   <li> Omega supports JDK 1.7 </li>
+   <li> Using Spring-Boot 2.1 by default </li>
+ </ul>
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-817">SCB-817</a>] -         Setup the TCC events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-818">SCB-818</a>] -         Omega support of TCC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-819">SCB-819</a>] -         Acceptance test of  TCC Demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-820">SCB-820</a>] -         TCC demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-856">SCB-856</a>] -         Implement reaction of the event in Alpha Server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-876">SCB-876</a>] -         Confirm and Cancel invocation support of Omega
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-877">SCB-877</a>] -         Alpha should pesistend the received TCC events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-923">SCB-923</a>] -         Provide API to access the TCC events
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-739">SCB-739</a>] -         It is useless for @SagaStart timeout,and it could not be compensated under @SagaStart
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-741">SCB-741</a>] -         Caused by: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column &#39;payloads&#39; at row 1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-745">SCB-745</a>] -         RetrySender should not throw exception when go the saga start event.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-821">SCB-821</a>] -         Add missing dependencyManagement for omega-transport-feign
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-822">SCB-822</a>] -         Update LICENSE/NOTICE for saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-824">SCB-824</a>] -         Failed to build saga demos
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-826">SCB-826</a>] -         SagaStart abort event should use LocalTransactionID
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-830">SCB-830</a>] -         Update Chassis from 1.0.0-m2 to 1.0.0 in Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-831">SCB-831</a>] -         Saga UT failed at LoadBalancedClusterMessageSenderTest on Windows environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-963">SCB-963</a>] -         Saga transactional method can&#39;t work when compensation happens
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1081">SCB-1081</a>] -         CompositeOmegaCallback&#39;s compensate(TxEvent event) method has concurrency issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1098">SCB-1098</a>] -         Pack pom need to be updated
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-665">SCB-665</a>] -         Provide TCC  support
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-730">SCB-730</a>] -         Add Feign transport for supporting Spring Cloud
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-731">SCB-731</a>] -         Add the omega-transport-feign into distribution kit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-732">SCB-732</a>] -         Add the omega-transport-feign into distribution kit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-909">SCB-909</a>] -         Add fault tolerance for service comb TCC
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-244">SCB-244</a>] -         [pack] add demo to use pack with java chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-630">SCB-630</a>] -         Active the -Pdocker profile if detect the docker installation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-639">SCB-639</a>] -         upgrade docker maven plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-660">SCB-660</a>] -         Update the dubbo example compose file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-750">SCB-750</a>] -         Dependency management is incomplete in Saga and Java-Chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-785">SCB-785</a>] -         Cannot get the GlobalTxId and LocalTxId in the compensation method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-805">SCB-805</a>] -         If the node time of alpha and omega are not same, the transaction could be aborted
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-806">SCB-806</a>] -         Polish alpha-server logger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-813">SCB-813</a>] -         pack-contract-grp module mvn install builds failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-829">SCB-829</a>] -         An index on TxEvent (globalTxId) should be added
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-853">SCB-853</a>] -         Support JDK7 in saga-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-865">SCB-865</a>] -         Refactoring the Omega Interceptors
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-868">SCB-868</a>] -         Added kamon metrics to Alpha Server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-874">SCB-874</a>] -         saga dubbo demo insert sql and readme optimization
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-875">SCB-875</a>] -         Start the old saga demo with sh script
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-879">SCB-879</a>] -         Pack the aspectj-wave jar into Alpha Server when using perf profile
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-885">SCB-885</a>] -         saga alpha event scanner delete duplicate events sql optimization
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-913">SCB-913</a>] -         Switch TCC demo JPA implementation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-916">SCB-916</a>] -         Clean up @order annotation in TransactionAspectConfig
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1013">SCB-1013</a>] -         Support to disable the event scanner Alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1018">SCB-1018</a>] -         Upgrade spring boot  version to 1.5.17 and 2.0.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1029">SCB-1029</a>] -         The compensationMethod size is small
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1036">SCB-1036</a>] -         Throw exception when Compensable retries below -1.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1086">SCB-1086</a>] -         Using spring-boot-2 by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1090">SCB-1090</a>] -         Unify the logger output of the Omega transport.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1091">SCB-1091</a>] -         Upgrade the dubbo version to 2.6.4
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1093">SCB-1093</a>] -         Upgrade the Spring Boot version to 2.1.1 Release
+</li>
+</ul>
+
+<h2>        Test
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-823">SCB-823</a>] -         Set up a fully functional test in kubernetes environment
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-648">SCB-648</a>] -         Omega support JDK7
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-766">SCB-766</a>] -         Upgrade Spring Boot version to 2.0.3.Release and 1.5.14.Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-784">SCB-784</a>] -         SagaStart annotated method should abort the saga transaction once the exception is thrown
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-976">SCB-976</a>] -         Create new git repo for ServiceComb Saga-Core module
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1078">SCB-1078</a>] -         Clean up the saga-core modules from saga-pack repo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1097">SCB-1097</a>] -         Clean up the distribution of servicecomb-pack
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+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Saga Actuator Downloads">
+    <meta itemprop="description" content="ServiceComb Saga Actuator Downloads">
+    
+    <meta itemprop="dateModified" content="March 28, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Saga Actuator Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>版本号</th>
+      <th>源码</th>
+      <th>发布包</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Saga Actuator 0.3.0(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。
+建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/" target="_blank">目录</a>中获取这些文件，而不是从镜像中获取这些文件。 ```
+ gpg –import KEYS</p>
+
+<p>or</p>
+
+<p>pgpk -a KEYS</p>
+
+<p>or</p>
+
+<p>pgp -ka KEYS</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>
+要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。
+
+
+</code></pre></div></div>
+<p>gpg –verify apache-servicecomb-saga<strong>**</strong><strong>.asc apache-servicecomb-saga-</strong><strong>**</strong>*</p>
+
+<p>or</p>
+
+<p>pgpv apache-servicecomb-saga-<strong>**</strong>**.asc</p>
+
+<p>or</p>
+
+<p>pgp apache-servicecomb-saga-<strong>**</strong>**.asc</p>
+
+<p>```</p>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/" target="_blank">仓库</a>下载SHA签名并使用sha512sum验证。</p>
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new file mode 100644
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+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
+
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+        <ul>
+          
+            
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+            <li><a href="/cn/release/pack-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
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+            
+
+            <li><a href="/cn/release/pack-downloads/" class="">发布包</a></li>
+          
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+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Toolkit</span>
+        
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+            
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+
+            <li><a href="/cn/release/toolkit-release-notes/" class="">发布说明</a></li>
+          
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+    
+      <li>
+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
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+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-release-notes/" class="active">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Saga Actuator Release Notes">
+    <meta itemprop="description" content="ServiceComb Saga Actuator Release Notes">
+    
+    <meta itemprop="dateModified" content="March 28, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Saga Actuator Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Saga-Actuator-0.3.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-866">SCB-866</a>] -         Support to call SQL component in saga-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-867">SCB-867</a>] -         Support to call SQL component in saga-format
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-864">SCB-864</a>] -         Support to call SQL component in saga-core
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-692">SCB-692</a>] -         Restore the centric Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-834">SCB-834</a>] -         Upgrade akka version to 2.5.14
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-852">SCB-852</a>] -         Split the actor work from saga-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-855">SCB-855</a>] -         Support JDK7 in saga-format
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-962">SCB-962</a>] -         The forwardPolicy of Saga can configure the maximum of retries
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-783">SCB-783</a>] -         Update the Saga License file with new added modules
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-976">SCB-976</a>] -         Create new git repo for ServiceComb Saga-Core module
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+</h1>
+            
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+        
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+        <p><strong>注意</strong>: servicecomb-saga 已经改名为 servicecomb-pack， 请移步 <a href="https://servicecomb.apache.org/cn/release/pack-downloads/">pack_downloads</a> 来下载最新的版本.</p>
+
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+
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+      <th>版本号</th>
+      <th>源码</th>
+      <th>发布包</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Saga 0.2.1(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Saga 0.2.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Saga 0.1.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。</p>
+
+<p>建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/">目录</a>中获取这些文件，而不是从镜像中获取这些文件。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-saga********.asc apache-servicecomb-saga-*********
+
+or
+
+pgpv apache-servicecomb-saga-********.asc
+
+or
+
+pgp apache-servicecomb-saga-********.asc
+
+
+</code></pre></div></div>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/" target="_blank">仓库</a>下载SHA签名并使用sha512sum验证。</p>
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+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
+
+        
+        <ul>
+          
+            
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+
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+            <li><a href="/cn/release/pack-release-notes/" class="">发布说明</a></li>
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+            
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+            
+            
+
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+        
+      </li>
+    
+      <li>
+        
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+        
+
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+        <ul>
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+
+            
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+
+            <li><a href="/cn/release/toolkit-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/toolkit-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
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+    
+      <li>
+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-release-notes/" class="active">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/saga-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Release Notes">
+    <meta itemprop="description" content="Release Notes">
+    
+    <meta itemprop="dateModified" content="March 28, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version saga-0.2.1
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-741">SCB-741</a>] -         Caused by: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column &#39;payloads&#39; at row 1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-821">SCB-821</a>] -         Add missing dependencyManagement for omega-transport-feign
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-963">SCB-963</a>] -         Saga transactional method can&#39;t work when compensation happens
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-730">SCB-730</a>] -         Add Feign transport for supporting Spring Cloud
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-732">SCB-732</a>] -         Add the omega-transport-feign into distribution kit
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-785">SCB-785</a>] -         Cannot get the GlobalTxId and LocalTxId in the compensation method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-805">SCB-805</a>] -         If the node time of alpha and omega are not same, the transaction could be aborted
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-806">SCB-806</a>] -         Polish alpha-server logger 
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-784">SCB-784</a>] -         SagaStart annotated method should abort the saga transaction once the exception is thrown
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version saga-0.2.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-426">SCB-426</a>] -         The type of CompensationContext.context field should be thread-safe
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-480">SCB-480</a>] -         [pack] GrpcTxEvent miss the timeout when converting the TxEvent 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-505">SCB-505</a>] -         The service should throw the exception when the saga transaction is timeout
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-566">SCB-566</a>] -         mysql.sql doesn&#39;t have the retried and retryMethod in the TxEvent table
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-584">SCB-584</a>] -         DubboConsumerFilterTest fails on linux
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-615">SCB-615</a>] -         fix typos in EventScanner
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-224">SCB-224</a>] -         [pack] retry sub-transaction on failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-342">SCB-342</a>] -         [pack] secure gRPC transport
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-245">SCB-245</a>] -         [pack] support to intercept dubbo&#39;s requests
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-246">SCB-246</a>] -         [pack] add demo to use pack with dubbo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-410">SCB-410</a>] -         Upgrade to Spring Boot 2.0 in Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-428">SCB-428</a>] -         Add omegaUniquaIdGenerator to the omega id generator
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-429">SCB-429</a>] -         Upgrade Spring Boot version to 1.5.10
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-433">SCB-433</a>] -         Update the maven docker plugin running setting
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-436">SCB-436</a>] -         Clean up the docker-compose file of booking demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-463">SCB-463</a>] -         Upgrade Spring Boot version to 2.0.1.Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-464">SCB-464</a>] -         Upgrade Java Chassis version to 1.0.0-m1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-465">SCB-465</a>] -         Start the build metrics of Saga in travis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-497">SCB-497</a>] -         Omega test log issue
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-545">SCB-545</a>] -         Update the length of field serviceName from varchar(16) to varchar(36)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-547">SCB-547</a>] -         EventScaner abort if the findFirstAbortedGlobalTxByType has more than one result
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-568">SCB-568</a>] -         Provide web page for pack Demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-569">SCB-569</a>] -         Add document about SSL setup of Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-571">SCB-571</a>] -         Decouple OmegaContext in the Application
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-573">SCB-573</a>] -         Split the docker-compose file for debugging easily
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-583">SCB-583</a>] -         Upgrade Spring Boot version to 1.5.13.Release and 2.0.2.Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-628">SCB-628</a>] -         correct the naming of demos
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-632">SCB-632</a>] -         reformat code according to the google code style
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-633">SCB-633</a>] -         Correct artifactId and module of saga-spring-cloud-demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-641">SCB-641</a>] -         Add the dubbo transport plugin into release kit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-642">SCB-642</a>] -         Update the third party dependencies version in the License file
+</li>
+</ul>
+
+<h2>        Wish
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-20">SCB-20</a>] -         JDK9 not supported when unit testing while doc showing JDK8+
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-153">SCB-153</a>] -         Upgrade to Spring Boot 2.0 
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-390">SCB-390</a>] -         [pack] Investigating the Byteman and the Cucumber with running the recovery acceptance tests
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-437">SCB-437</a>] -         [Doc] Provide a FAQ list for Saga project
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-452">SCB-452</a>] -         Write java doc for some class
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-555">SCB-555</a>] -         Add Saga Dubbo demo to show how to manage the transactions with Dubbo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-635">SCB-635</a>] -         Cut Saga-0.2.0 Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-647">SCB-647</a>] -         Update LICENSE/NOTICE for release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version saga-0.1.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-237">SCB-237</a>] -         [pack] acceptance tests of success scenarios
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-278">SCB-278</a>] -         [pack] acceptance test of transaction failure and successful compensation scenario
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-130">SCB-130</a>] -         Update the Git PR template
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-323">SCB-323</a>] -         inconsistent port in saga demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-404">SCB-404</a>] -         The base folder name is the same for source and binary release
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-95">SCB-95</a>] -         [pack] able to link sub-transactions as a single global transaction
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-96">SCB-96</a>] -         [pack] intercept sub-transaction commits
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-97">SCB-97</a>] -         [pack] update alpha about transaction state
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-98">SCB-98</a>] -         [pack] send compensate context from alpha to omegas
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-99">SCB-99</a>] -         [pack] compensate on transaction failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-100">SCB-100</a>] -         [pack] async transaction support
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-101">SCB-101</a>] -         [pack] design doc
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-138">SCB-138</a>] -         [pack] omega&#39;s callback about transaction state
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-151">SCB-151</a>] -         [pack] pack usage demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-152">SCB-152</a>] -         [pack] update alpha on compensation completed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-212">SCB-212</a>] -         [pack] sub-transaction timeout support
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-227">SCB-227</a>] -         [pack] stop sub transaction from running when global tx failed
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-140">SCB-140</a>] -         [pack] do not compensate duplicate transaction events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-141">SCB-141</a>] -         [pack] support multiple sub transaction in a single service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-149">SCB-149</a>] -         [pack] service/instance aware omega callback
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-164">SCB-164</a>] -         [pack] alpha connection recovery on crash
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-167">SCB-167</a>] -         [pack] inform alpha about omega id on connection
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-168">SCB-168</a>] -         [pack] resend events on connection loss &amp; load balance
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-169">SCB-169</a>] -         [pack] omega get notified whether events are sent successfully or not
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-173">SCB-173</a>] -         [pack] mark start of saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-174">SCB-174</a>] -         [pack] object serialization/deserialization
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-183">SCB-183</a>] -         [pack] omega callback cleanup on connection loss
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-211">SCB-211</a>] -         [pack] exponential backoff resending event on cluster down or network down
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-213">SCB-213</a>] -         [pack] proper timing to send out SagaEndedEvent on asynchronous compensation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-218">SCB-218</a>] -         [pack] stateless alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-220">SCB-220</a>] -         [pack] duplicate abort event filter to avoid redundant compensation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-228">SCB-228</a>] -         Update to replace the type of TxEvent with Enum
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-232">SCB-232</a>] -         EventType should be same between omega and alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-233">SCB-233</a>] -         Don&#39;t deploy if building with the PR
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-234">SCB-234</a>] -         [pack] fail fast if alpha cluster down
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-238">SCB-238</a>] -         Remove third-party dependencies which violates apache licensing policy
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-239">SCB-239</a>] -         [pack] omega recovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-243">SCB-243</a>] -         [pack] support to intercept java chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-270">SCB-270</a>] -         [pack] in order compensation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-305">SCB-305</a>] -         [pack] postIntercept should throw the exception when the timeout happens
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-330">SCB-330</a>] -         [pack] update documents of saga pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-395">SCB-395</a>] -         Add How to build into README file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-400">SCB-400</a>] -         Add guides to run demo without docker compose 
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-104">SCB-104</a>] -         simplify transport rest template implementation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-122">SCB-122</a>] -         Add incubating note to website
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-123">SCB-123</a>] -         Add DISLAIMER to the ServiceComb git repo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-154">SCB-154</a>] -         Update the package  org.apache.servicecomb
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-157">SCB-157</a>] -         Update the release setting of pom
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-193">SCB-193</a>] -         Generated the Licenses,Notice and DISCLAIMER files when building the artifact
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-231">SCB-231</a>] -         Only publish the snapshot in master branch
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-249">SCB-249</a>] -         [pack] replace hibernate with other ORM tech to avoid license issue
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-260">SCB-260</a>] -         Prepare LICENSE/NOTICE files for releasing
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-344">SCB-344</a>] -         [pack] use mysql as alpha&#39;s backend database
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-346">SCB-346</a>] -         Create the distribution kit for Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-363">SCB-363</a>] -         Remove legacy code from Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-378">SCB-378</a>] -         Add readme for samples so that users can run the samples code by just reading the readme doc
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-380">SCB-380</a>] -         Add incubating to file name the release kit
+</li>
+</ul>
+
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+    <meta itemprop="headline" content="ServiceComb Service-Center下载">
+    <meta itemprop="description" content="ServiceComb Service-Center Downloads">
+    
+    <meta itemprop="dateModified" content="November 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Service-Center下载
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>版本号</th>
+      <th>源码</th>
+      <th>Windows版本</th>
+      <th>Linux版本</th>
+      <th>Darwin版本</th>
+      <th>与之兼容的Java-Chassis版本</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Service-Center 1.3.0 (LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Service-Center 1.2.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-src.tar.gz">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-src.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Service-Center 1.1.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-src.tar.gz">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-src.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Service-Center 1.0.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Service-Center 1.0.0-m2</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>NA</td>
+      <td>Java-Chassis 1.0.0-m2 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Service-Center 1.0.0-m1</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>NA</td>
+      <td>Java-Chassis 1.0.0-m1 or above</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong></p>
+
+<p>使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。
+建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/" target="_blank">目录</a> 中获取这些文件，而不是从镜像中获取这些文件。.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-service-center-********.asc apache-servicecomb-service-center-*********
+
+or
+
+pgpv apache-servicecomb-service-center-********.asc
+
+or
+
+pgp apache-servicecomb-service-center-********.asc
+
+
+</code></pre></div></div>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/" target="_blank">仓库</a>下载SHA签名并使用sha512sum验证。</p>
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+
+            
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+
+            <li><a href="/cn/release/java-chassis-downloads/" class="">发布包</a></li>
+          
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+          <span class="nav__sub-title">Mesher</span>
+        
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+        
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+          
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+            <li><a href="/cn/release/mesher-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
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+            
+
+            <li><a href="/cn/release/mesher-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
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+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
+
+        
+        <ul>
+          
+            
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+            <li><a href="/cn/release/pack-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/pack-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Toolkit</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
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+
+            <li><a href="/cn/release/toolkit-release-notes/" class="">发布说明</a></li>
+          
+            
+            
+
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+            
+
+            <li><a href="/cn/release/toolkit-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
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+
+            <li><a href="/cn/release/saga-actuator-release-notes/" class="">发布说明</a></li>
+          
+            
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+
+            
+            
+
+            <li><a href="/cn/release/saga-actuator-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
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+            <li><a href="/cn/release/saga-release-notes/" class="">发布说明</a></li>
+          
+            
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+
+            <li><a href="/cn/release/saga-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Release Notes">
+    <meta itemprop="description" content="Release Notes">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.3.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1296">SCB-1296</a>] -         [Syncer] Store Syncer data to etcd
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1295">SCB-1295</a>] -         Syncer for synchronize data between multiple service centers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1301">SCB-1301</a>] -         [Syncer] Syncer reliability improvement, support for etcd cluster management
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1302">SCB-1302</a>] -         [Syncer]Refactor data strcture of storage module to support springcloud Eureka.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1307">SCB-1307</a>] -         Store Syncer data to etcd
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1453">SCB-1453</a>] -         [Syncer] New servicecenter plugin supported eureka
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1427">SCB-1427</a>] -         Move storage to syncer/servicecenter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1429">SCB-1429</a>] -         Use etcd operation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1441">SCB-1441</a>] -         [Syncer] Support for using tls certificate in Syner
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1464">SCB-1464</a>] -         [Syncer] The architecture picture needs to be updated, after adding support for eureka
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1465">SCB-1465</a>] -         [Syncer] Command line parameter error in Quick Start
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1491">SCB-1491</a>] -         [Syncer] Example of instance access between multiple service-centers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1498">SCB-1498</a>] -         Allow schema modification of services in production environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1512">SCB-1512</a>] -         Allow custom handler chain
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1539">SCB-1539</a>] -         Add command line to support output syncer version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1540">SCB-1540</a>] -         Add syncer&#39;s packaging command to the script of release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.2.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1050">SCB-1050</a>] -         Metrics cache does not clean
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Unexpected events publish if error occurs in previous list-watch loop
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Re-register instance does not keep alive the lease
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Use the raw password if decrypt failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Should not show the shared microservices by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Add grpc keepalive time
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1069">SCB-1069</a>] -         Wrong response of batch delete microservices API
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1049">SCB-1049</a>] -         Alarm center
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1087">SCB-1087</a>] -         Add View Schema Option in Schema Details Page
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1052">SCB-1052</a>] -         import zap logger without binding go version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1053">SCB-1053</a>] -         Batch microservices instances discovery API
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1070">SCB-1070</a>] -         New instance &#39;TESTING&#39; status
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1092">SCB-1092</a>] -         More abundant metrics information
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1219">SCB-1219</a>] -         Prepare 1.2.0 Release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.1.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-744">SCB-744</a>] -         Wrong error code returned in Find API
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-851">SCB-851</a>] -         Can not get providers if consumer have * dependency rule
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-857">SCB-857</a>] -         Provider rule of consumer can not be removed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-863">SCB-863</a>] -         build script for docker image gives an error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-890">SCB-890</a>] -         Lost changed event when bootstrap with embedded etcd
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-912">SCB-912</a>] -         rest client still verify peer host when verifyPeer flag set false
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-924">SCB-924</a>] -         Etcd cacher should re-list etcd in fixed time interval
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-927">SCB-927</a>] -         The latest Lager is not compatible
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-929">SCB-929</a>] -         Concurrent error in update resource APIs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-930">SCB-930</a>] -         Service Center Frontend stops responding in Schema test if Schema has &#39;\&quot;&#39; character in the description
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-934">SCB-934</a>] -         Get all dependency rules will panic
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-938">SCB-938</a>] -         Should check self presevation max ttl
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-951">SCB-951</a>] -         Wrong help information in scctl
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-958">SCB-958</a>] -         The instance delete event delay more than 2s
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-977">SCB-977</a>] -         Dependencies will not be updated in 5min when micro service is changed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-980">SCB-980</a>] -         The dependency will be broken when commit etcd failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-981">SCB-981</a>] -         Can not remove the microservice and instance properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-991">SCB-991</a>] -         Optimize args parsing
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-993">SCB-993</a>] -         Bug fixes
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-994">SCB-994</a>] -         SC can not read the context when client using grpc api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1027">SCB-1027</a>] -         Fix the core dump in SC which compiled with go1.10+
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-815">SCB-815</a>] -         Support deploy in Kubernetes
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-850">SCB-850</a>] -         Support discover instances from kubernetes cluster
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-869">SCB-869</a>] -         SC cli tool
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-902">SCB-902</a>] -         Support service discovery by Service Mesh
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-914">SCB-914</a>] -         Support using scctl to download schemas
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-941">SCB-941</a>] -         Support multiple datacenter deployment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-949">SCB-949</a>] -         Support access distinct kubernetes clusters
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-418">SCB-418</a>] -         How to deploy a SC cluster in container environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-435">SCB-435</a>] -         Add plugin document in ServiceCenter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-792">SCB-792</a>] -         More abundant metrics information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-796">SCB-796</a>] -         Update the paas-lager package
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-797">SCB-797</a>] -         More information in dump API
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-807">SCB-807</a>] -         Limit the topology view to only 100 microservices.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-808">SCB-808</a>] -         Aut-refresh the dashboard and service-list page every 10sec
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-809">SCB-809</a>] -         Verify the chinese version of the UI as all chinese text was translated using Google Translate
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-816">SCB-816</a>] -         Update the protobuf version to 1.0.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-840">SCB-840</a>] -         Support configable limit in buildin quota plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-844">SCB-844</a>] -         Update golang version to 1.9.2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-848">SCB-848</a>] -         Uses zap to replace the paas-lager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-862">SCB-862</a>] -         Using different environment variables in image
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-892">SCB-892</a>] -         output plugins configs in version api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-899">SCB-899</a>] -         Support go1.11 module maintaining
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-901">SCB-901</a>] -         Making service registration api idempotent
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-937">SCB-937</a>] -         Customizable tracing sample rate
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-953">SCB-953</a>] -         Support sync distinct Kubernetes service types to service-center
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-978">SCB-978</a>] -         Fix translation issues for Chinese Locale on First Load
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-983">SCB-983</a>] -         Output the QPS per domain
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-984">SCB-984</a>] -         Add Health Check command
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1015">SCB-1015</a>] -         Support the forth microservice version number registration
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-720">SCB-720</a>] -         Show the instance statistics in Dashboard and Instance List in Side Menu
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1016">SCB-1016</a>] -         Change git repo name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1028">SCB-1028</a>] -         Prepare 1.1.0 Service-Center Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1033">SCB-1033</a>] -         Update license for Service-Center
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0
+</code></pre></div></div>
+
+<h4 id="new-featuresimprovements">New Features/Improvements:</h4>
+<ul>
+  <li>Make ETCD connection more Resilient</li>
+  <li>Make ETCD request timeout configurable</li>
+  <li>Support TLS Plugin</li>
+  <li>Optimize Governance API for Searching Schema</li>
+  <li>Optimize Find Instance API</li>
+  <li>Use glide for dependency management</li>
+  <li>Add release binaries for MacOS</li>
+  <li>Add Toplogy View and Instance View in UI</li>
+</ul>
+
+<h4 id="bug-fix">Bug-Fix:</h4>
+<ul>
+  <li>Fix connection leak in etcd</li>
+  <li>Fix Lose of events in some scenarios</li>
+  <li>Fix Cache mismatch.</li>
+</ul>
+
+<h6 id="for-more-details-please-click-here">For more details please <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342427">click here</a></h6>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0-m2
+</code></pre></div></div>
+
+<h4 id="api-changes-">API Changes :</h4>
+<ul>
+  <li>Governance API also returns self microservice information.</li>
+  <li>Governance API should not show the shared microservices information.</li>
+  <li>Support batch delete in registry.</li>
+  <li>Change the type of force query parameter to bool in delete api.</li>
+</ul>
+
+<h4 id="new-featuresimprovements-1">New Features/Improvements:</h4>
+<ul>
+  <li>Support Async Rest Template.</li>
+  <li>Support of Testing Schema from frontend.</li>
+  <li>Support log rotation.</li>
+  <li>Support ipv6.</li>
+  <li>Static data return instanceCount by domain.</li>
+  <li>Convenient store extension.</li>
+  <li>Retry the connection to etcd in-case of failure.</li>
+  <li>Show proper error details in frontend.</li>
+  <li>Support Default TLS Cipher Suites.</li>
+  <li>Proxy Frontend request to Service-Center.</li>
+  <li>Use bower to resolve the dependency of frontend.</li>
+  <li>Add registry server HC mechanism.</li>
+</ul>
+
+<h4 id="bug-fix-1">Bug-Fix:</h4>
+<ul>
+  <li>Fix issue of filter instance using service-tags.</li>
+  <li>Fix re-creation of tracing file.</li>
+  <li>Fix SC cannot check duplicate endpoints when registered with etcd.</li>
+  <li>Fix wrong parentId in tracing data.</li>
+  <li>Fix wrong log print in update Instance.</li>
+  <li>Fix null pointer reference in zipkin plugin.</li>
+  <li>Fix delete service should delete dependency key.</li>
+  <li>Fix cache does not match with etcd store.</li>
+  <li>Fix remove the backup log files which are expired.</li>
+  <li>Fix typos in response of schema api’s.</li>
+  <li>Fix incorrect metric label value.</li>
+  <li>Fix register instance withe same id will create redundant endpoints.</li>
+</ul>
+
+<h6 id="for-more-details-please-click-here-1">For more details please <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342354">click here</a></h6>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0-m1
+</code></pre></div></div>
+
+<h4 id="api-changes--1">API Changes :</h4>
+<ul>
+  <li>Added new API to get All Schema List.</li>
+  <li>Add Service statistics in the Governance API.</li>
+  <li>Add Self-microservice information in the Governance API.</li>
+</ul>
+
+<h4 id="new-featuresimprovements-2">New Features/Improvements:</h4>
+<ul>
+  <li>Support discovery of SC instances by Consumer micro-service.</li>
+  <li>Event driven implementation for dependency rules.</li>
+  <li>Make compact interval configurable and avoid defragmentation of the database when compacted.</li>
+  <li>Update the default quota’s limit of service/instance count.</li>
+  <li>Update black-list rule controls in discovery.</li>
+</ul>
+
+<h4 id="metrics-">Metrics :</h4>
+<ul>
+  <li>Added support for Prometheus metrics exposure.</li>
+  <li>Added templates for Grafana Dashboard.</li>
+</ul>
+
+<h4 id="optimization">Optimization:</h4>
+<ul>
+  <li>Optimized Restful clients and plugins loader.</li>
+  <li>Optimized Service-Count calculation rule.</li>
+  <li>Use CDN for resolving all the dependencies of frontend.</li>
+</ul>
+
+<h4 id="bug-fix-2">Bug-Fix:</h4>
+<ul>
+  <li>Fix panic issue while deleting instance and invalid metrics request.</li>
+  <li>Fix modify schema response issue and heart-beat failure when etcd has no leader.</li>
+  <li>Fix batch delete api to exempt from unregistering service-center microservice.</li>
+  <li>Fix watcher wrong event sequence when SC modify resource concurrently</li>
+  <li>Fix discovery of default APP services in Shared service mode</li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
+
+
+        
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+            
+
+            <li><a href="/cn/release/kie-downloads/" class="">发布包</a></li>
+          
+        </ul>
+        
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+    
+      <li>
+        
+          <span class="nav__sub-title">Java-Chassis</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/cn/release/java-chassis-release-notes/" class="">发布说明</a></li>
+          
+            
+            
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+            <li><a href="/cn/release/java-chassis-downloads/" class="">发布包</a></li>
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+          <span class="nav__sub-title">Saga</span>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Toolkit Downloads">
+    <meta itemprop="description" content="ServiceComb Toolkit Downloads">
+    
+    <meta itemprop="dateModified" content="September 02, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Toolkit Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="发布包">发布包</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>版本号</th>
+      <th>源码</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Toolkit 0.1.0(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-toolkit/0.1.0/apache-servicecomb-toolkit-distribution-0.1.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/0.1.0/apache-servicecomb-toolkit-distribution-0.1.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/0.1.0/apache-servicecomb-toolkit-distribution-0.1.0-src.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>发布包验证</strong>
+使用PGP或SHA签名验证下载文件的完整性是很有必要的。PGP签名可以使用GPG或PGP进行验证，请下载 <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a>以及相关发行的asc签名文件。
+建议从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/" target="_blank">目录</a>中获取这些文件，而不是从镜像中获取这些文件。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>要验证二进制文件或源代码，您可以从主发行目录下载相关的asc文件并按照以下指南进行操作。</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-toolkit********.asc apache-servicecomb-toolkit-*********
+
+or
+
+pgpv apache-servicecomb-toolkit-********.asc
+
+or
+
+pgp apache-servicecomb-toolkit-********.asc
+
+
+</code></pre></div></div>
+
+<p>另外，您也可以从主发行<a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/" target="_blank">仓库</a>下载SHA签名并使用sha512sum验证。</p>
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+        <li><a href="/cn/users/faq/">常见问题</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">基金会</a></li>
+        <li><a href="http://www.apache.org/licenses/">许可证</a></li>
+        <li><a href="http://www.apache.org/events/current-event">活动</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">赞助</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">鸣谢</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
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+    <meta itemprop="headline" content="ServiceComb Toolkit Release Notes">
+    <meta itemprop="description" content="ServiceComb Toolkit Release Notes">
+    
+    <meta itemprop="dateModified" content="September 02, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Toolkit Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version toolkit-0.1.0
+</code></pre></div></div>
+
+<h2> New and Noteworthy </h2>
+<ul>
+    <li> Extract the microservice project, OpenAPI contract file and document from the code</li>
+    <li> Generate the microservice project and document from contract</li>
+    <li> Contract verify </li>
+  </ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1358">SCB-1358</a>] -         the issue of invalid naming of generated contract files
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1359">SCB-1359</a>] -         the issue of generating document failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1360">SCB-1360</a>] -         the issue of verifying contract file is not correct
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1361">SCB-1361</a>] -         optimize toolkit user experience 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1412">SCB-1412</a>] -         some redudent folder generated after running test
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1456">SCB-1456</a>] -         Fix the plugin bug that throws some exception when specifying configuration property contractLocation as a file
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1383">SCB-1383</a>] -         support toolkit maven plugin commands that generating code
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1384">SCB-1384</a>] -         refact the code to optimize user experience
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1428">SCB-1428</a>] -         Improve toolkit-maven-plugin test to make it running is not dependent by maven plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1444">SCB-1444</a>] -         support to generate mutiple modules in the same project
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1315">SCB-1315</a>] -         IP clearance for ServiceComb Toolkit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1329">SCB-1329</a>] -         Cleanup unclear license dependencies
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1334">SCB-1334</a>] -         Enable the Travis CI of the servicecomb-toolkit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1351">SCB-1351</a>] -         Some issues about using toolkit plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1363">SCB-1363</a>] -         update licenses and notice
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1400">SCB-1400</a>] -         Complement and improve unit test
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1422">SCB-1422</a>] -         optimize classmaker
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1426">SCB-1426</a>] -         Support for configuring the toolkit maven plugin in the parent pom
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1433">SCB-1433</a>] -         Remove unit test for constant
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1436">SCB-1436</a>] -         Model is not generated, but the related package is imported
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1447">SCB-1447</a>] -         Add samples
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1452">SCB-1452</a>] -         update README
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1454">SCB-1454</a>] -         The modules tag is not generated in the pom file when using cli
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1455">SCB-1455</a>] -         Adjust the directory where the document is generated
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1458">SCB-1458</a>] -         add settings for distribution
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1459">SCB-1459</a>] -         Add information about the release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1460">SCB-1460</a>] -         Skip the deployment of samples and it
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1463">SCB-1463</a>] -         Optimize samples readme
+</li>
+</ul>
+
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+        <li><a href="http://www.apache.org/licenses/">许可证</a></li>
+        <li><a href="http://www.apache.org/events/current-event">活动</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">赞助</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">鸣谢</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">贡献</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">报告本网页问题</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_release/cn/toolkit_releaseNotes.md">在Github上编辑此页</a></li>
+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
+        <li><a href="/cn/security">安全</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">社区</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">邮件列表</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
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+      </ul>
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+</div>
+<div class="page__footer-bottom">
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content/cn/security/index.html

diff --git a/content/cn/security/index.html b/content/cn/security/index.html
new file mode 100644
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+<title>安全问题 - Apache ServiceComb</title>
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+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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+          
+            
+          
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+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
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+                <li><a href="/cn/docs/users/" class="">用户手册</a></li>
+                
+                <li><a href="/cn/slides/" class="">大咖视频</a></li>
+                
+                <li><a href="/cn/faqs/" class="">常见问题</a></li>
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+        <ul class="hidden-links hidden"></ul>
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+      <div class="back-to-home"><a href="/cn/">首页</a> > 安全问题</div>
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+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h1 id="apache-servicecomb-安全问题">Apache ServiceComb 安全问题</h1>
+
+<p>Apache Software Foundation在消除其软件项目中的安全问题方面采取了严格的立场。 Apache ServiceComb也十分关注与其特性和功能相关的安全问题。</p>
+
+<p>如果您对ServiceComb的安全性感到担忧，或者您发现了漏洞或潜在的威胁，请不要犹豫与<a href="http://www.apache.org/security/">Apache安全团队</a>联系，发送邮件至<a href="mailto：security@apache.org">security@apache.org</a>。 在邮件中请指明项目名称ServiceComb并提供相关问题或潜在威胁的描述。 同时推荐重现和复制安全问题的方法。 在评估和分析调查结果后，Apache安全团队和ServiceComb社区将直接与您回复。</p>
+
+<p><strong>请注意</strong> 在提交安全邮件之前，请勿在公共领域披露安全电子邮件报告的安全问题。</p>
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+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">基金会</a></li>
+        <li><a href="http://www.apache.org/licenses/">许可证</a></li>
+        <li><a href="http://www.apache.org/events/current-event">活动</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">赞助</a></li>
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+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">贡献</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">报告本网页问题</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_pages/cn/security.md">在Github上编辑此页</a></li>
+        <li><a href="/cn/developers/submit-codes/">代码提交指南</a></li>
+        <li><a href="/cn/security">安全</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">社区</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">邮件列表</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
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content/cn/slides/index.html

diff --git a/content/cn/slides/index.html b/content/cn/slides/index.html
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+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
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+<!-- end SEO -->
+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
+<!-- http://t.co/dKP3o1e -->
+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
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+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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+        <a href="/cn/docs/servicecomb-accept-newcapec-institute-code-donation/" rel="permalink">Apache ServiceComb社区接受新开普软件研究院的代码捐赠
+</a>
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+    <p class="archive__item-excerpt" itemprop="description">Apache Servicecomb社区接受新开普软件研究院的代码捐赠
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+        <a href="/cn/docs/use-oas-validator-help-standardize-oas-spec/" rel="permalink">使用OAS Validator帮助你规范OpenAPI Spec文档
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+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)
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+      
+        <a href="/cn/docs/how-to-do-microservice-accept-test/" rel="permalink">如何给微服务架构的项目做验收测试？
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文将介绍如何给微服务架构的项目做验收测试
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+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="permalink">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</a>
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+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup
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+      
+        <a href="/cn/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Eureka
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+          
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Consul
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+          
+          
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-cluster/" rel="permalink">ServiceComb Pack 0.4.0 Cluster : 集群实现
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb Pack 集群以及实现原理
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
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+  2 分钟 阅读
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+          
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/customized-tracing-with-servicecomb/" rel="permalink">ServiceComb + Zipkin : 使用篇——自定义追踪
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb 和 Zipkin 实现自定义追踪
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-springcloud-zuul-demo/" rel="permalink">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</p>
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+          
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transaction-of-services-2/" rel="permalink">基于服务的分布式事务(下篇)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">在本文中我们先从分布式事务场景入手，采用交互图的方式，向大家介绍分布式Saga以及TCC分布式事务协调协议交互，最后结合ServiceComb Pack所提供的示例向大家介绍如何编写Saga以及TCC的应用代码。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
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+          
+          
+          
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transaction-of-services-1/" rel="permalink">基于服务的分布式事务(上篇)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文从分布式事务需要解决的问题入手，向大家介绍了建立在补充基础之上的基于服务的分布式事务的解决思路。接下来我们结合具体的示例介绍了完美的补偿（TCC）和非完美补偿（Saga）两种分布式事务协调协议，最后结合ServiceComb Pack的实现原理详细介绍了ServiceComb Pack的架构实现。
+</p>
+    
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/chuanzhiboke-servicecomb-tutoria-release/" rel="permalink">Apache ServiceComb 社区联合传智播客黑马程序员、博学谷、传智汇子品牌发布微服务化教程
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">传智播客与Apache ServiceComb课程及技术资源共建仪式圆满结束
+</p>
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+
+        
+          
+          
+            <h2 id="2018" class="archive__subtitle">2018</h2>
+            
+          
+          
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+
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-introduction-slides/" rel="permalink">Apache ServiceComb开源微服务社区介绍
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb开源微服务社区介绍PDF
+</p>
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/opensource-project-is-not-so-far-away/" rel="permalink">开源项目没有那么遥远
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">开源项目没有那么遥远
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/talk-to-apache-experts" rel="permalink">Apache ServiceComb带您对话Apache大咖
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache专家现场解读Apache基金会及孵化器运作模式
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/osi-microservices/" rel="permalink">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</p>
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai/" rel="permalink">Apache ServiceComb (incubating) Meetup -上海 2018.10.12
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Meetup
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/loadtest-saga-with-kubernetes" rel="permalink">使用Kubernetes对Saga进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何使用Kubernetes方便的对Saga进行性能测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
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+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/release-note-1-0-0" rel="permalink">[里程碑]Apache ServiceComb 1.0.0版本正式发布
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServieComb版本正式步入稳定态
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/consul-servicemesh" rel="permalink">Consul Service Mesh实战
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Consul Service Mesh介绍与相关实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-day-slides/" rel="permalink">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-incubating-day/" rel="permalink">微服务 Meetup：Apache ServiceComb (incubating) Day 详细议程
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Detailed Agenda of Apache ServiceComb (incubating) Day
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
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+        
+          
+          
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/how-to-grow-up-to-be-an-apache-committer/" rel="permalink">如何从一名开源小白成长为Apache Committer
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何从一名开源小白成长为Apache Committer
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
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+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
+</div>
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+        
+          
+          
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/saga_with_cucumber/" rel="permalink">ServiceComb Saga使用Cucumber做验收测试源码分析
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Saga使用Cucumber做验收测试源码分析
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
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+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transactions-saga-implementation/" rel="permalink">Saga分布式事务解决方案与实践
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">2018年QConBeijing Saga分布式事务解决方案与实践演讲实录
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
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+        
+          
+          
+          
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/open-design/" rel="permalink">如何设计一个优质的微服务框架：Apache ServiceComb 的开放性设计
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文讲述了整个 开源微服务框架 Apache ServiceComb 设计形成的前因后果，尝试从理念、思想和实践结合的维度剖析一个优质的微服务框架应该具备哪些要素，包括但不限于 对开发者友好、高性能、内外部扩展性&gt;等。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/build-java-chassis-microservices-using-gradle/" rel="permalink">使用gradle构建基于Java Chassis开发的微服务
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/saga_pack_design/" rel="permalink">ServiceComb数据一致性解决方案Saga演进介绍
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Saga演进介绍
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/join_the_community/" rel="permalink">如何加入ServiceComb社区
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何加入ServiceComb社区
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/config_center_integration/" rel="permalink">ServiceComb示例讲解微服务配置中心选型与对接
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb对接配置中心
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+            <h2 id="2017" class="archive__subtitle">2017</h2>
+            
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/jira_beginner_guide/" rel="permalink">老司机带你刷任务 - ServiceComb JIRA入门指南
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb JIRA入门指南
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/service-center-ui/" rel="permalink">Service-Center Management UI Console
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction Service-Center Management Console
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/how-to-reform-a-legacy-system/" rel="permalink">最头疼的遗留系统该如何改造？
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">微服务是否是业界期待已久的企业架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
+</div>
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+        
+          
+          
+          
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+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed_saga_3/" rel="permalink">ServiceComb中的数据最终一致性方案 - part 3
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Saga和其他数据一致性解决方案相比有什么不同之处？
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed_saga_2/" rel="permalink">ServiceComb中的数据最终一致性方案 - part 2
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb中的分布式Saga设计
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/performance-test-on-seckill-with-jmeter/" rel="permalink">使用JMeter对秒杀示例进行性能测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何使用JMeter进行性能测试以及获取秒杀示例的性能基线
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/maven_dependency_management/" rel="permalink">使用maven管理复杂依赖关系的技巧
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">maven dependency management
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
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+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed_saga_1/" rel="permalink">ServiceComb中的数据最终一致性方案 - part 1
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">在微服务场景下的数据一致性问题背景
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
+</div>
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+        
+          
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+          
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/seckill-development-journey-part-III/" rel="permalink">秒杀开发历程（三）
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何一步一步构建秒杀项目的过程
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
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+        
+          
+          
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+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/seckill-development-journey-part-II/" rel="permalink">秒杀开发历程（二）
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何一步一步构建秒杀项目的过程
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
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+        
+          
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+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/seckill-development-journey-part-I/" rel="permalink">秒杀开发历程（一）
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何一步一步构建秒杀项目的过程
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
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+        
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+
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/stress-test-on-company-with-jmeter-in-k8s/" rel="permalink">在Kubernetes集群中使用JMeter对Company示例进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何在Kubernetes集群上使用JMeter进行压力测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
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+        
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/autoscale-on-company/" rel="permalink">微服务化后的按需精细化资源控制
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍使用kubernetes的弹性伸缩能力在微服务化的Company中实现按需精细化资源控制的实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
+</div>
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+        
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/company-on-kubernetes/" rel="permalink">在kubernetes上一键式部署company
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍在kubernetes集群中一键式部署基于ServiceComb开发的company示例
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/communication-btw-sc-ms/" rel="permalink">Communication Between Service-Center and MicroServices
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how service-center and microservices work together
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/tracing-with-servicecomb/" rel="permalink">基于 ServiceComb 和 Zipkin 的分布式调用链追踪
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb 和 Zipkin 实现分布式调用链追踪
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/go-to-cloud/" rel="permalink">单体应用利用ServiceComb实现微服务化和云化之路
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">该文档演示：从已有基于spring boot的单体应用利用ServiceComb实现微服务化和云化之路
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/linuxcon-workshop-demo/" rel="permalink">Linux Con Workshop Demo
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A step by step guide on how to use ServiceComb to develop a complete project
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+        
+    </div>
+    <div id="postByTag" class="tab-pane fade">
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+
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+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
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+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+        
+          
+          <h2 id="1-0-0" class="archive__subtitle">1.0.0</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/release-note-1-0-0" rel="permalink">[里程碑]Apache ServiceComb 1.0.0版本正式发布
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServieComb版本正式步入稳定态
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="apache" class="archive__subtitle">Apache</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/talk-to-apache-experts" rel="permalink">Apache ServiceComb带您对话Apache大咖
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache专家现场解读Apache基金会及孵化器运作模式
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="apache-way" class="archive__subtitle">Apache Way</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/opensource-project-is-not-so-far-away/" rel="permalink">开源项目没有那么遥远
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">开源项目没有那么遥远
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/how-to-grow-up-to-be-an-apache-committer/" rel="permalink">如何从一名开源小白成长为Apache Committer
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何从一名开源小白成长为Apache Committer
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="crm" class="archive__subtitle">CRM</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="cluster" class="archive__subtitle">Cluster</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-cluster/" rel="permalink">ServiceComb Pack 0.4.0 Cluster : 集群实现
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb Pack 集群以及实现原理
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="committer" class="archive__subtitle">Committer</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/opensource-project-is-not-so-far-away/" rel="permalink">开源项目没有那么遥远
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">开源项目没有那么遥远
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/how-to-grow-up-to-be-an-apache-committer/" rel="permalink">如何从一名开源小白成长为Apache Committer
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何从一名开源小白成长为Apache Committer
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="consul" class="archive__subtitle">Consul</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="cucumber" class="archive__subtitle">Cucumber</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/saga_with_cucumber/" rel="permalink">ServiceComb Saga使用Cucumber做验收测试源码分析
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Saga使用Cucumber做验收测试源码分析
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="ddd" class="archive__subtitle">DDD</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="discovery" class="archive__subtitle">Discovery</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Eureka
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="edge" class="archive__subtitle">Edge</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="jpa" class="archive__subtitle">JPA</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="jwt" class="archive__subtitle">JWT</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="lc3-ppt-workshop" class="archive__subtitle">LC3，PPT，Workshop</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-day-slides/" rel="permalink">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="meetup" class="archive__subtitle">Meetup</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/playing-on-the-open-source-community-with-Apache-ServiceComb-BUPT/" rel="permalink">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="permalink">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/talk-to-apache-experts" rel="permalink">Apache ServiceComb带您对话Apache大咖
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache专家现场解读Apache基金会及孵化器运作模式
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/osi-microservices/" rel="permalink">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai/" rel="permalink">Apache ServiceComb (incubating) Meetup -上海 2018.10.12
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-incubating-day/" rel="permalink">微服务 Meetup：Apache ServiceComb (incubating) Day 详细议程
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Detailed Agenda of Apache ServiceComb (incubating) Day
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="pdf" class="archive__subtitle">PDF</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-introduction-slides/" rel="permalink">Apache ServiceComb开源微服务社区介绍
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb开源微服务社区介绍PDF
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="pack" class="archive__subtitle">Pack</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transaction-of-services-2/" rel="permalink">基于服务的分布式事务(下篇)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">在本文中我们先从分布式事务场景入手，采用交互图的方式，向大家介绍分布式Saga以及TCC分布式事务协调协议交互，最后结合ServiceComb Pack所提供的示例向大家介绍如何编写Saga以及TCC的应用代码。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transaction-of-services-1/" rel="permalink">基于服务的分布式事务(上篇)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文从分布式事务需要解决的问题入手，向大家介绍了建立在补充基础之上的基于服务的分布式事务的解决思路。接下来我们结合具体的示例介绍了完美的补偿（TCC）和非完美补偿（Saga）两种分布式事务协调协议，最后结合ServiceComb Pack的实现原理详细介绍了ServiceComb Pack的架构实现。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="qcon" class="archive__subtitle">QCon</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transactions-saga-implementation/" rel="permalink">Saga分布式事务解决方案与实践
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">2018年QConBeijing Saga分布式事务解决方案与实践演讲实录
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="saga" class="archive__subtitle">Saga</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transaction-of-services-2/" rel="permalink">基于服务的分布式事务(下篇)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">在本文中我们先从分布式事务场景入手，采用交互图的方式，向大家介绍分布式Saga以及TCC分布式事务协调协议交互，最后结合ServiceComb Pack所提供的示例向大家介绍如何编写Saga以及TCC的应用代码。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transaction-of-services-1/" rel="permalink">基于服务的分布式事务(上篇)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文从分布式事务需要解决的问题入手，向大家介绍了建立在补充基础之上的基于服务的分布式事务的解决思路。接下来我们结合具体的示例介绍了完美的补偿（TCC）和非完美补偿（Saga）两种分布式事务协调协议，最后结合ServiceComb Pack的实现原理详细介绍了ServiceComb Pack的架构实现。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/saga_with_cucumber/" rel="permalink">ServiceComb Saga使用Cucumber做验收测试源码分析
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Saga使用Cucumber做验收测试源码分析
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed-transactions-saga-implementation/" rel="permalink">Saga分布式事务解决方案与实践
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">2018年QConBeijing Saga分布式事务解决方案与实践演讲实录
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="scaffold" class="archive__subtitle">Scaffold</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/crm-part-I/" rel="permalink">客户管理系统微服务化实战-PartI
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">客户管理系统微服务化实战-PartI
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="servicecomb" class="archive__subtitle">ServiceComb</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-springcloud-zuul-demo/" rel="permalink">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="servicecomb-pack" class="archive__subtitle">ServiceComb Pack</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Eureka
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-cluster/" rel="permalink">ServiceComb Pack 0.4.0 Cluster : 集群实现
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb Pack 集群以及实现原理
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="spring-cloud-eureka" class="archive__subtitle">Spring Cloud Eureka</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack 集成发现服务 Eureka
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="springcloud-zuul" class="archive__subtitle">SpringCloud Zuul</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-springcloud-zuul-demo/" rel="permalink">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="consul" class="archive__subtitle">consul</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/consul-servicemesh" rel="permalink">Consul Service Mesh实战
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Consul Service Mesh介绍与相关实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="gradle" class="archive__subtitle">gradle</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/build-java-chassis-microservices-using-gradle/" rel="permalink">使用gradle构建基于Java Chassis开发的微服务
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="jmeter" class="archive__subtitle">jmeter</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/stress-test-on-company-with-jmeter-in-k8s/" rel="permalink">在Kubernetes集群中使用JMeter对Company示例进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何在Kubernetes集群上使用JMeter进行压力测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="kubernetes" class="archive__subtitle">kubernetes</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/autoscale-on-company/" rel="permalink">微服务化后的按需精细化资源控制
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍使用kubernetes的弹性伸缩能力在微服务化的Company中实现按需精细化资源控制的实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/company-on-kubernetes/" rel="permalink">在kubernetes上一键式部署company
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍在kubernetes集群中一键式部署基于ServiceComb开发的company示例
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="maven" class="archive__subtitle">maven</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/maven_dependency_management/" rel="permalink">使用maven管理复杂依赖关系的技巧
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">maven dependency management
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="microservice" class="archive__subtitle">microservice</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/playing-on-the-open-source-community-with-Apache-ServiceComb-BUPT/" rel="permalink">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/osi-microservices/" rel="permalink">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/loadtest-saga-with-kubernetes" rel="permalink">使用Kubernetes对Saga进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何使用Kubernetes方便的对Saga进行性能测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/consul-servicemesh" rel="permalink">Consul Service Mesh实战
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Consul Service Mesh介绍与相关实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="release" class="archive__subtitle">release</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/release-note-1-0-0" rel="permalink">[里程碑]Apache ServiceComb 1.0.0版本正式发布
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServieComb版本正式步入稳定态
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="saga" class="archive__subtitle">saga</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/loadtest-saga-with-kubernetes" rel="permalink">使用Kubernetes对Saga进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何使用Kubernetes方便的对Saga进行性能测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/saga_pack_design/" rel="permalink">ServiceComb数据一致性解决方案Saga演进介绍
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Saga演进介绍
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="seckill" class="archive__subtitle">seckill</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/performance-test-on-seckill-with-jmeter/" rel="permalink">使用JMeter对秒杀示例进行性能测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何使用JMeter进行性能测试以及获取秒杀示例的性能基线
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="service-center" class="archive__subtitle">service center</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/service-center-ui/" rel="permalink">Service-Center Management UI Console
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction Service-Center Management Console
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="servicemesh" class="archive__subtitle">servicemesh</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/loadtest-saga-with-kubernetes" rel="permalink">使用Kubernetes对Saga进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何使用Kubernetes方便的对Saga进行性能测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/consul-servicemesh" rel="permalink">Consul Service Mesh实战
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Consul Service Mesh介绍与相关实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="zipkin" class="archive__subtitle">zipkin</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/customized-tracing-with-servicecomb/" rel="permalink">ServiceComb + Zipkin : 使用篇——自定义追踪
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb 和 Zipkin 实现自定义追踪
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/tracing-with-servicecomb/" rel="permalink">基于 ServiceComb 和 Zipkin 的分布式调用链追踪
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb 和 Zipkin 实现分布式调用链追踪
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="事务一致性" class="archive__subtitle">事务一致性</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed_saga_3/" rel="permalink">ServiceComb中的数据最终一致性方案 - part 3
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Saga和其他数据一致性解决方案相比有什么不同之处？
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/distributed_saga_2/" rel="permalink">ServiceComb中的数据最终一致性方案 - part 2
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb中的分布式Saga设计
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="分布式追踪" class="archive__subtitle">分布式追踪</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/customized-tracing-with-servicecomb/" rel="permalink">ServiceComb + Zipkin : 使用篇——自定义追踪
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb 和 Zipkin 实现自定义追踪
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/tracing-with-servicecomb/" rel="permalink">基于 ServiceComb 和 Zipkin 的分布式调用链追踪
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍如何使用 ServiceComb 和 Zipkin 实现分布式调用链追踪
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="加入社区" class="archive__subtitle">加入社区</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/join_the_community/" rel="permalink">如何加入ServiceComb社区
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">如何加入ServiceComb社区
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="华为云" class="archive__subtitle">华为云</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/go-to-cloud/" rel="permalink">单体应用利用ServiceComb实现微服务化和云化之路
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">该文档演示：从已有基于spring boot的单体应用利用ServiceComb实现微服务化和云化之路
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="压力测试" class="archive__subtitle">压力测试</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/performance-test-on-seckill-with-jmeter/" rel="permalink">使用JMeter对秒杀示例进行性能测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何使用JMeter进行性能测试以及获取秒杀示例的性能基线
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/stress-test-on-company-with-jmeter-in-k8s/" rel="permalink">在Kubernetes集群中使用JMeter对Company示例进行压力测试
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何在Kubernetes集群上使用JMeter进行压力测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="开放-扩展" class="archive__subtitle">开放，扩展</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/open-design/" rel="permalink">如何设计一个优质的微服务框架：Apache ServiceComb 的开放性设计
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文讲述了整个 开源微服务框架 Apache ServiceComb 设计形成的前因后果，尝试从理念、思想和实践结合的维度剖析一个优质的微服务框架应该具备哪些要素，包括但不限于 对开发者友好、高性能、内外部扩展性&gt;等。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="弹性伸缩" class="archive__subtitle">弹性伸缩</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/autoscale-on-company/" rel="permalink">微服务化后的按需精细化资源控制
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍使用kubernetes的弹性伸缩能力在微服务化的Company中实现按需精细化资源控制的实践
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="微服务" class="archive__subtitle">微服务</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-accept-newcapec-institute-code-donation/" rel="permalink">Apache ServiceComb社区接受新开普软件研究院的代码捐赠
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache Servicecomb社区接受新开普软件研究院的代码捐赠
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/use-oas-validator-help-standardize-oas-spec/" rel="permalink">使用OAS Validator帮助你规范OpenAPI Spec文档
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文将介绍如何规范你的OpenAPI Spec文档
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/how-to-do-microservice-accept-test/" rel="permalink">如何给微服务架构的项目做验收测试？
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文将介绍如何给微服务架构的项目做验收测试
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="permalink">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/servicecomb-springcloud-zuul-demo/" rel="permalink">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">基于 ServiceComb 和 SpringCloud Zuul 快速构建微服务系统
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/chuanzhiboke-servicecomb-tutoria-release/" rel="permalink">Apache ServiceComb 社区联合传智播客黑马程序员、博学谷、传智汇子品牌发布微服务化教程
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">传智播客与Apache ServiceComb课程及技术资源共建仪式圆满结束
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-introduction-slides/" rel="permalink">Apache ServiceComb开源微服务社区介绍
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb开源微服务社区介绍PDF
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/talk-to-apache-experts" rel="permalink">Apache ServiceComb带您对话Apache大咖
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache专家现场解读Apache基金会及孵化器运作模式
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/Apache-ServiceComb-Meetup-2018-Shanghai/" rel="permalink">Apache ServiceComb (incubating) Meetup -上海 2018.10.12
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-day-slides/" rel="permalink">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">LC3大会微服务Workshop-Apaceh ServiceComb(incubating) Day 演讲PPT
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/apache-servicecomb-incubating-day/" rel="permalink">微服务 Meetup：Apache ServiceComb (incubating) Day 详细议程
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Detailed Agenda of Apache ServiceComb (incubating) Day
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="服务中心" class="archive__subtitle">服务中心</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/communication-btw-sc-ms/" rel="permalink">Communication Between Service-Center and MicroServices
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how service-center and microservices work together
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="示例" class="archive__subtitle">示例</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/linuxcon-workshop-demo/" rel="permalink">Linux Con Workshop Demo
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A step by step guide on how to use ServiceComb to develop a complete project
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="秒杀" class="archive__subtitle">秒杀</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/seckill-development-journey-part-III/" rel="permalink">秒杀开发历程（三）
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何一步一步构建秒杀项目的过程
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/seckill-development-journey-part-II/" rel="permalink">秒杀开发历程（二）
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何一步一步构建秒杀项目的过程
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
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+  少于 1 分钟 阅读
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+    
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+</div>
+
+          
+            
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/seckill-development-journey-part-I/" rel="permalink">秒杀开发历程（一）
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">介绍如何一步一步构建秒杀项目的过程
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="系统改造" class="archive__subtitle">系统改造</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/how-to-reform-a-legacy-system/" rel="permalink">最头疼的遗留系统该如何改造？
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">微服务是否是业界期待已久的企业架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="设计" class="archive__subtitle">设计</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/open-design/" rel="permalink">如何设计一个优质的微服务框架：Apache ServiceComb 的开放性设计
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本文讲述了整个 开源微服务框架 Apache ServiceComb 设计形成的前因后果，尝试从理念、思想和实践结合的维度剖析一个优质的微服务框架应该具备哪些要素，包括但不限于 对开发者友好、高性能、内外部扩展性&gt;等。
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="课程" class="archive__subtitle">课程</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/chuanzhiboke-servicecomb-tutoria-release/" rel="permalink">Apache ServiceComb 社区联合传智播客黑马程序员、博学谷、传智汇子品牌发布微服务化教程
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">传智播客与Apache ServiceComb课程及技术资源共建仪式圆满结束
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
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+  少于 1 分钟 阅读
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+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="部署" class="archive__subtitle">部署</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/company-on-kubernetes/" rel="permalink">在kubernetes上一键式部署company
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">本篇将介绍在kubernetes集群中一键式部署基于ServiceComb开发的company示例
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="配置中心" class="archive__subtitle">配置中心</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/config_center_integration/" rel="permalink">ServiceComb示例讲解微服务配置中心选型与对接
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb对接配置中心
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 分钟 阅读
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="里程碑" class="archive__subtitle">里程碑</h2>
+          
+            
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+
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/cn/docs/release-note-1-0-0" rel="permalink">[里程碑]Apache ServiceComb 1.0.0版本正式发布
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServieComb版本正式步入稳定态
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  少于 1 分钟 阅读
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+    
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+
+          
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content/developers/becomming-a-commiter.html

diff --git a/content/developers/becomming-a-commiter.html b/content/developers/becomming-a-commiter.html
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@@ -0,0 +1,581 @@
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+      <div class="back-to-home"><a href="/">Home</a> > Becomming a Committer</div>
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+        
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+    <meta itemprop="headline" content="Becomming a Committer">
+    <meta itemprop="description" content="Becoming a committer of Apache ServiceComb">
+    
+    <meta itemprop="dateModified" content="June 19, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Becomming a Committer
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>ServiceComb follows the Apache way to build the community. Anyone can become a committer once they have contributed sufficiently to the project and earned the trust.</p>
+
+<h2 id="contribute-and-earn-the-trust">Contribute and Earn The Trust</h2>
+
+<ul>
+  <li><a href="/release">Download the releases</a></li>
+  <li><a href="mailto:dev@servicecomb.apache.org">Join the mailing list</a></li>
+  <li><a href="https://issues.apache.org/jira/projects/SCB/">Report bugs and/or feature requests</a></li>
+</ul>
+
+<p>See the <a href="/developers/contributing">contributing</a> guide on how to become a contributor.</p>
+
+<p>ServiceComb is a meritocracy the same as Apache. Once you have shown sufficient sustained commitment to the project and earned the trust, the PMC may invite you to be a committer.</p>
+
+<p>There are multiple actions other than coding to build the trust in the ServiceComb community, code review, design discussion, user support, community outreach, documentation, project management etc.</p>
+
+<h2 id="new-committer-process">New Committer Process</h2>
+
+<p>The ServiceComb community follows the Apache Community’s <a href="http://community.apache.org/newcommitter.html">process</a> on accepting a new committer.</p>
+
+<ul>
+  <li>Start the vote in @private.</li>
+  <li>If the vote passes, send an offer to become a committer with @private CC’ed.</li>
+  <li>Add the committer to the <a href="/developers/team">team page</a></li>
+  <li><a href="/developers/setup-committer-rights/">Setup committer rights</a></li>
+</ul>
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+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Get started</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/becomming-a-committer.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
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+      </ul>
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+<div class="page__footer-bottom">
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content/developers/contributing.html

diff --git a/content/developers/contributing.html b/content/developers/contributing.html
new file mode 100644
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@@ -0,0 +1,619 @@
+<!doctype html>
+<!--
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+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
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+<!-- end SEO -->
+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
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+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
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+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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+      padding-right: 3em;
+    }
+    .greedy-nav button {
+      position: absolute;
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+  </style>
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+
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+
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+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
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+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+            
+          
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+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
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+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
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+                  <a href="/developers/">Projects</a>
+                
+              </li>
+            
+          
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+          
+          
+            
+            <li class="def-nav-li" onmouseenter="$('#childrenShow').css('display', 'block')">
+              
+              
+              
+
+              
+                <a href="/docs/users/">Documentation</a>
+              
+
+              <ul id="childrenShow" class="def-children-show" onmouseleave="$('#childrenShow').css('display', 'none')">
+                
+                <li><a href="/docs/getting-started/" class="">Get started</a></li>
+                
+                <li><a href="/docs/users/" class="">Docs</a></li>
+                
+                <li><a href="/slides/" class="">Video</a></li>
+                
+                <li><a href="/faqs/" class="">FAQ</a></li>
+                
+              </ul>
+            </li>
+          
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a class="active" href="/developers/contributing">Community</a>
+                
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+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/year-archive/">Blogs</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/release/">Downloads</a>
+                
+              </li>
+            
+          
+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
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+            <a href=/cn/developers/contributing>中文</a>
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+      <div class="back-to-home"><a href="/">Home</a> > Contributing to Apache ServiceComb</div>
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+          <a href="/developers/contributing"><span class="nav__sub-title nav__sub-title-with-url">Contributing to Apache ServiceComb</span></a>
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+      <li>
+        
+          
+          
+
+          <a href="/developers/becomming-a-commiter"><span class="nav__sub-title nav__sub-title-with-url">Becoming A Committer of Apache ServiceComb</span></a>
+        
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+    
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+        
+          
+          
+
+          <a href="/developers/setup-develop-environment/"><span class="nav__sub-title nav__sub-title-with-url">Develop Environment Setup</span></a>
+        
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+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/submit-codes/"><span class="nav__sub-title nav__sub-title-with-url">Code Submit Guide</span></a>
+        
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+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/use-jira/"><span class="nav__sub-title nav__sub-title-with-url">How to Use JIRA</span></a>
+        
+
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+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">Set Up Write Access for Committer</span></a>
+        
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+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/release-guide/"><span class="nav__sub-title nav__sub-title-with-url">How to Release in Apache</span></a>
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+    
+      <li>
+        
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+          <a href="/developers/release-validation-guide/"><span class="nav__sub-title nav__sub-title-with-url">How to verify Apache Release</span></a>
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+          <a href="/developers/sonarcloud-how-to/"><span class="nav__sub-title nav__sub-title-with-url">How to Use SonarCloud</span></a>
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+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#contributing-to-apache-servicecomb" id="markdown-toc-contributing-to-apache-servicecomb">Contributing to Apache ServiceComb</a></li>
+  <li><a href="#getting-in-touch" id="markdown-toc-getting-in-touch">Getting in touch</a></li>
+  <li><a href="#improving-the-documentation" id="markdown-toc-improving-the-documentation">Improving the documentation</a></li>
+  <li><a href="#if-you-find-a-bug-or-problem" id="markdown-toc-if-you-find-a-bug-or-problem">If you find a bug or problem</a></li>
+  <li><a href="#working-on-the-code" id="markdown-toc-working-on-the-code">Working on the code</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="contributing-to-apache-servicecomb">Contributing to Apache ServiceComb</h2>
+<p>There are many ways that you can help make ServiceComb a better piece of solution for the Microservice - please dive in and help!</p>
+<ul>
+  <li>Try surf the documentations - if somethings confusing or not clear, let us know.</li>
+  <li>Download the code &amp; try it out and see what you think.</li>
+  <li>Browse the source code. Ask question in the Gitter if you want to know more detail about the code.</li>
+  <li>Want to do some hacking? take a look at our  <a href="https://issues.apache.org/jira/browse/SCB">issue tracker</a> for open issues or features that need to implemented, take ownership of an issue and try fix it.</li>
+  <li>If you are a new to ServiceComb and would like to help us,  you can also find <a href="https://issues.apache.org/jira/browse/SCB-333?jql=project%20%3D%20SCB%20AND%20status%20%3D%20Open%20AND%20fixVersion%20in%20(EMPTY%2C%20java-chassis-1.0.0-m2)%20AND%20labels%20%3D%20newbie">some easy to resolve issues</a>.</li>
+  <li>Leave a comment on the issue to let us know you are working on it and add yourself as a watcher to get informed about all modifications.</li>
+</ul>
+
+<h2 id="getting-in-touch">Getting in touch</h2>
+
+<p>There are various ways of communicating with the ServiceComb community.</p>
+<ul>
+  <li>Join us on the <a href="http://servicecomb.apache.org/cn/developers/subscribe-mail-list">mailing list</a> and take part in any conversations</li>
+  <li>Pop by on <a href="https://gitter.im/ServiceCombUsers/Lobby">Gitter</a> and say hi</li>
+</ul>
+
+<h2 id="improving-the-documentation">Improving the documentation</h2>
+
+<p>Documentation is massively important to help users make the most of Apache ServiceComb and its probably the area that needs the most help!
+So if you are interested in helping the documentation effort; whether its just to fix a page here or there, correct a link or even write a tutorial or improve what documentation is already there please do dive in and help!
+Most of the documentation is stored as the markdown text, you can edit this page in the website from the below edit it link if you logined in the github, then you can send a PR for it.</p>
+
+<h2 id="if-you-find-a-bug-or-problem">If you find a bug or problem</h2>
+
+<p>Please raise a new issue in our <a href="https://issues.apache.org/jira/browse/SCB">issue tracker</a>
+If you can create a JUnit test case then your issue is more likely to be resolved quicker.
+e.g. take a look at some of the existing <a href="https://github.com/apache/servicecomb-pack/tree/master/alpha/alpha-core/src/test/java/org/apache/servicecomb/pack/alpha/core">unit tests cases</a>
+Then we can add your issue to git and then we’ll know when its really fixed and we can ensure that the problem stays fixed in future releases.</p>
+
+<h2 id="working-on-the-code">Working on the code</h2>
+
+<p>We recommend to work on the code from  <a href="https://github.com/search?q=org%3Aapache+servicecomb">Github</a>, it has the following sub-projects:
+| Project Name | Project Introduction | Programming Language |
+|——————————————————————————-|—————————-|———-|
+| <a href="https://github.com/apache/servicecomb-java-chassis">servicecomb-java-chassis</a> | Java Microservice Framework（SDK） | Java |
+| <a href="https://github.com/apache/servicecomb-service-center">servicecomb-service-center</a> | Service registration and discovery | Golang |
+| <a href="https://github.com/apache/servicecomb-pack">servicecomb-pack</a> | Distributed transaction schemes,support Saga and TCC | Java |
+| <a href="https://github.com/apache/servicecomb-Mesher">servicecomb-mesher</a>       | Service Mesh implementation of ServiceComb     | Golang    |
+| <a href="https://github.com/apache/servicecomb-kie">servicecomb-kie</a>                                   |  Microsevice configure center  | Golang    |
+| <a href="https://github.com/apache/servicecomb-toolkit">servicecomb-toolkit</a>               | A contract-based Microservice development toolkit | Java       |
+| <a href="https://github.com/apache/servicecomb-samples">servicecomb-samples</a>                                   | Microservice examples of ServiceComb  | Java     |
+| <a href="https://github.com/apache/servicecomb-fence">servicecomb-fence</a>               | Apache ServiceComb security module for java-chassis | Java       |
+| <a href="https://github.com/apache/servicecomb-docs">servicecomb-docs</a> | User manual | CSS |
+| <a href="https://github.com/apache/servicecomb-website">servicecomb-website</a> | Website | HTML |
+| <a href="https://github.com/apache/servicecomb-saga-actuator">servicecomb-saga-actuator</a> | Centralized Saga Transaction Coordinator <em>Archived</em> | Java |</p>
+
+<p>If you intend to work on the code and provide patches and other work you want to submit to the Apache ServiceComb projects, then you can fork the project on github and work on your own fork. The custom work you do should be done on branches you create, which can then be committed and pushed upstream, and then submitted to Apache ServiceComb as PRs (pull requests). You can find many resources online how to work on github projects and how to submit work to these projects.</p>
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+<p><strong>ServiceComb</strong> is hosted on <a href="https://github.com/apache?q=servicecomb">Github</a>, it has the following sub-projects:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>Project Name</th>
+      <th>Project Introduction</th>
+      <th>Programming Language</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-java-chassis">servicecomb-java-chassis</a></td>
+      <td>Java Microservice Framework（SDK）</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-service-center">servicecomb-service-center</a></td>
+      <td>Service registration and discovery</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-pack">servicecomb-pack</a></td>
+      <td>Distributed transaction schemes,support Saga and TCC</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-Mesher">servicecomb-mesher</a></td>
+      <td>Service Mesh implementation of ServiceComb</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-kie">servicecomb-kie</a></td>
+      <td>Microsevice configure center</td>
+      <td>Golang</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-toolkit">servicecomb-toolkit</a></td>
+      <td>A contract-based Microservice development toolkit</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-samples">servicecomb-samples</a></td>
+      <td>Microservice examples of ServiceComb</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-fence">servicecomb-fence</a></td>
+      <td>Apache ServiceComb security module for java-chassis</td>
+      <td>Java</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-docs">servicecomb-docs</a></td>
+      <td>User manual</td>
+      <td>CSS</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-website">servicecomb-website</a></td>
+      <td>Website</td>
+      <td>HTML</td>
+    </tr>
+    <tr>
+      <td><a href="https://github.com/apache/servicecomb-saga-actuator">servicecomb-saga-actuator</a></td>
+      <td>Centralized Saga Transaction Coordinator <em>Archived</em></td>
+      <td>Java</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>There are many ways to get involved in ServiceComb and contribute to it, e.g. submit codes, submit tests, tools improvements, document improvements. You can contribute to one or more interested projects. You can refer to the following guide about how to contribute to this community.</p>
+
+<ul>
+  <li><a href="/developers/setup-develop-environment/">Setup Develop Environment</a>. Introduce how to install and setup git, JDK, Maven and IDE(IntelliJ).</li>
+  <li><a href="/developers/submit-codes/">Code Submit Guide</a>. Introduce how to get involved with development of ServiceComb and how to submit codes.</li>
+</ul>
+
+<p>In the meanwhile, welcome to subscribe the <a href="mailto:dev-subscribe@servicecomb.apache.org">ServiceComb mailing list</a> to keep track of the development status of ServiceComb community and discuss with us.</p>
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+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/developer-guide.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
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content/developers/release-guide/index.html

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+    
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+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release guide for ServiceComb
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#pre-requisite" id="markdown-toc-pre-requisite">Pre-Requisite</a></li>
+  <li><a href="#maven-2-setup" id="markdown-toc-maven-2-setup">Maven 2 Setup</a></li>
+  <li><a href="#major-steps-for-doing-service-center-release" id="markdown-toc-major-steps-for-doing-service-center-release">Major Steps for doing Service-Center Release</a></li>
+  <li><a href="#major-steps-for-doing-java-chassis-release" id="markdown-toc-major-steps-for-doing-java-chassis-release">Major Steps for doing Java-Chassis Release</a></li>
+  <li><a href="#major-steps-for-doing-saga-release" id="markdown-toc-major-steps-for-doing-saga-release">Major Steps for doing Saga Release</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>This Guide helps you to do the release in Apache for ServiceComb projects.</p>
+
+<h2 id="pre-requisite">Pre-Requisite</h2>
+<p>To prepare or perform a released you MUST BE at least an Apache ServiceComb committer.</p>
+
+<ol>
+  <li>The CI for the project should be green.</li>
+  <li>Should have the version number for the project.</li>
+  <li>Should have <a href="https://www.apache.org/dev/openpgp.html#generate-key">Sign Key</a> for <a href="https://www.apache.org/dev/release-signing">signing the release</a>, the keys should be published to public key server.</li>
+  <li>Get familiar with the release settings in the parent Apache POM</li>
+</ol>
+
+<h2 id="maven-2-setup">Maven 2 Setup</h2>
+<p>As ServiceComb Java Chassis and Saga are using maven for the release, you should do some maven 2 setup before releasing these two projects.
+Before you deploy anything to the maven repository using Maven 2, you should configure your ~/.m2/settings.xml file so that the file permissions of the deployed artifacts are group writable. If you do not do this, other developers will not able to overwrite your SNAPSHOT releases with newer versions. The settings follow the <a href="http://maven.apache.org/developers/committer-settings.html">guidelines</a> used by the Maven project. Please pay particular attention to the <a href="http://maven.apache.org/guides/mini/guide-encryption.html">password encryption recommendations</a>.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>&lt;settings&gt;
+  ...
+  &lt;servers&gt;
+    &lt;!-- Per http://maven.apache.org/developers/committer-settings.html --&gt;
+
+    &lt;!-- To publish a snapshot of some part of Maven --&gt;
+    &lt;server&gt;
+      &lt;id&gt;apache.snapshots.https&lt;/id&gt;
+      &lt;username&gt; &lt;!-- YOUR APACHE LDAP USERNAME --&gt; &lt;/username&gt;
+      &lt;password&gt; &lt;!-- YOUR APACHE LDAP PASSWORD --&gt; &lt;/password&gt;
+    &lt;/server&gt;
+    &lt;!-- To publish a website of some part of Maven --&gt;
+    &lt;server&gt;
+      &lt;id&gt;apache.website&lt;/id&gt;
+      &lt;username&gt; &lt;!-- YOUR APACHE LDAP USERNAME --&gt; &lt;/username&gt;
+      &lt;filePermissions&gt;664&lt;/filePermissions&gt;
+      &lt;directoryPermissions&gt;775&lt;/directoryPermissions&gt;
+    &lt;/server&gt;
+    &lt;!-- To stage a release of some part of Maven --&gt;
+    &lt;server&gt;
+      &lt;id&gt;apache.releases.https&lt;/id&gt;
+      &lt;username&gt; &lt;!-- YOUR APACHE LDAP USERNAME --&gt; &lt;/username&gt;
+      &lt;password&gt; &lt;!-- YOUR APACHE LDAP PASSWORD --&gt; &lt;/password&gt;
+    &lt;/server&gt;
+    &lt;!-- To stage a website of some part of Maven --&gt;
+    &lt;server&gt;
+      &lt;id&gt;stagingSite&lt;/id&gt; &lt;!-- must match hard-coded repository identifier in site:stage-deploy --&gt;
+      &lt;username&gt; &lt;!-- YOUR APACHE LDAP USERNAME --&gt; &lt;/username&gt;
+      &lt;filePermissions&gt;664&lt;/filePermissions&gt;
+      &lt;directoryPermissions&gt;775&lt;/directoryPermissions&gt;
+    &lt;/server&gt;
+
+  &lt;/servers&gt;
+  ...
+  &lt;profiles&gt;
+    &lt;profile&gt;
+      &lt;id&gt;apache-release&lt;/id&gt;
+      &lt;properties&gt;
+        &lt;gpg.useagent&gt;false&lt;/gpg.useagent&gt;
+        &lt;gpg.passphrase&gt;&lt;!-- YOUR GPG PASSPHRASE --&gt;&lt;/gpg.passphrase&gt;
+        &lt;test&gt;false&lt;/test&gt;
+      &lt;/properties&gt;
+    &lt;/profile&gt;
+
+  &lt;/profiles&gt;
+...
+&lt;/settings&gt;
+</code></pre></div></div>
+
+<h2 id="major-steps-for-doing-service-center-release">Major Steps for doing Service-Center Release</h2>
+
+<p><strong><em>Make and Verify the Release</em></strong></p>
+
+<ol>
+  <li>Clone the service-center code.
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-service-center.git
+cd servicecomb-service-center
+gvt restore
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Create a Tag from the master branch based on the version number which needs to be released.</p>
+  </li>
+  <li>
+    <p>Run RAT tool to ensure no license issues are there, follow the guide over <a href="https://github.com/apache/servicecomb-service-center/tree/master/docs/release">here</a></p>
+  </li>
+  <li>
+    <p>Run the make_release.sh to make the release for windows and linux following the guide over <a href="https://github.com/apache/servicecomb-service-center/tree/master/scripts/release">here</a>.</p>
+  </li>
+  <li>
+    <p>Last Step will make the releases in root folder.</p>
+  </li>
+  <li>
+    <p>Run the releases of frontend and service-center in both linux and windows.</p>
+  </li>
+  <li>
+    <p>Run the <a href="https://github.com/apache/servicecomb-service-center/tree/master/integration">integration test</a> on the release.</p>
+  </li>
+  <li>
+    <p>If all the test passes then send the release candidate to peers to test in different machines.</p>
+  </li>
+  <li>Push the tag to master.</li>
+</ol>
+
+<p><strong><em>Sign the Release</em></strong></p>
+
+<ol>
+  <li>
+    <p>Once the tag is pushed then using the tag download the source code from git <a href="https://github.com/apache/servicecomb-service-center/tags">tag</a>.</p>
+  </li>
+  <li>
+    <p>Sign the 4 releases(linux, windows, darwin, src) and checksum.</p>
+  </li>
+  <li>
+    <p>Create a new directory <a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-service-center/">Apache dev Release SVN</a> with release package name and release candidate number. (for example : if you want to release 1.0.0-m2 and this is the second attempt of the release then the folder structure will be <code class="highlighter-rouge">1.0.0-m2/rc02</code>)</p>
+  </li>
+  <li>
+    <p>Upload the release to the directory created in last step.</p>
+  </li>
+  <li>
+    <p>Download all the releases from SVN and verify the signature and checksum.</p>
+  </li>
+</ol>
+
+<p><strong><em>PMC Approval</em></strong></p>
+
+<ol>
+  <li>
+    <p>Send the voting mail in <strong><em>dev@servicecomb.apache.org</em></strong> for 1PMC approval.</p>
+  </li>
+  <li>
+    <p>Wait for 72 hours or unless you get 3 +1 binding vote with no -1 vote. If you get even one -1 binding vote then fix the issue and start again from <strong><em>Step 1</em></strong>.</p>
+  </li>
+  <li>
+    <p>Publish the result of the vote in dev@servicecomb.apache.org.</p>
+  </li>
+</ol>
+
+<p><strong><em>Announcements</em></strong></p>
+
+<ol>
+  <li>
+    <p>Upload the releases to <a href="https://dist.apache.org/repos/dist/release/servicecomb/servicecomb-service-center/">Apache release repository</a>.</p>
+  </li>
+  <li>
+    <p>Wait for 24 hours to replicate the release in all the mirrors.</p>
+  </li>
+  <li>
+    <p>Delete old releases from <a href="https://dist.apache.org/repos/dist/dev">dev</a> and [release] (https://dist.apache.org/repos/dist/release) and check for the old release in archive, update the same links in the website for old releases.</p>
+  </li>
+  <li>
+    <p>Upload the release page of ServiceComb Website.</p>
+  </li>
+  <li>
+    <p>Send the announcement mails to dev@servicecomb.apache.org, announce@apache.org</p>
+  </li>
+</ol>
+
+<h2 id="major-steps-for-doing-java-chassis-release">Major Steps for doing Java-Chassis Release</h2>
+
+<p><strong><em>Make and Verify the Release</em></strong></p>
+
+<ol>
+  <li>Clone the java-chassis code.
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-java-chassis.git
+</code></pre></div>    </div>
+  </li>
+  <li>Cut the release using perl command to replace all the versions in pom.xml files
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>find . -name 'pom.xml'|xargs perl -pi -e 's/1.0.0-m2-SNAPSHOT/1.0.0-m2/g'
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Create a Tag from the master branch using the version number.</p>
+  </li>
+  <li>
+    <p>Clear all the redundant servicecomb releases in repository.apache.org</p>
+  </li>
+  <li>
+    <p>Add the keys in a reference folder.</p>
+  </li>
+  <li>
+    <p>Update the key path and passphrase in ~/.m2/settings.xml file.</p>
+  </li>
+  <li>
+    <p>Update the apache account username and password in the settings file.</p>
+  </li>
+  <li>Run the maven deploy command.
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn deploy -DskipTests -Prelease -Pdistribution -Ppassphrase
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Once every thing is uploaded then use the staging repo to verify the build using Company workshop.</p>
+  </li>
+  <li>
+    <p>Share the staging repo with peers to verify on different OS and machines using the demo.</p>
+  </li>
+  <li>
+    <p>If everything is fine then push the tag to master.</p>
+  </li>
+  <li>Close the staging repo is apache repositories</li>
+</ol>
+
+<p><strong><em>Sign the Releases</em></strong></p>
+
+<ol>
+  <li>
+    <p>Download the source code and distribution from the staging repo.</p>
+  </li>
+  <li>
+    <p>Sign the 2 releases(distribution, src) and checksum.</p>
+  </li>
+  <li>
+    <p>Create a new directory <a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-java-chassis/">Apache dev Release SVN</a> with release package name and release candidate number. (for example : if you want to release 1.0.0-m2 and this is the first attempt of the release then the folder structure will be <code class="highlighter-rouge">1.0.0-m2/rc01</code>)</p>
+  </li>
+  <li>
+    <p>Upload the release to  directory created in last step.</p>
+  </li>
+  <li>
+    <p>Download all the releases from SVN and verify the signature and checksum.</p>
+  </li>
+</ol>
+
+<p><strong><em>PMC approval</em></strong></p>
+
+<ol>
+  <li>
+    <p>Send the voting mail in dev@servicecomb.apache.org for PMC approval.</p>
+  </li>
+  <li>
+    <p>Wait for 72 hours or unless you get 3 +1 binding vote with no -1 vote. If you get even one -1 binding vote then fix the issue and start again from Step 1.</p>
+  </li>
+  <li>
+    <p>Publish the result of the vote in dev@servicecomb.apache.org.</p>
+  </li>
+</ol>
+
+<p><strong><em>Announcements</em></strong></p>
+
+<ol>
+  <li>
+    <p>Upload the releases to <a href="https://dist.apache.org/repos/dist/release/servicecomb/servicecomb-java-chassis/">Apache release repository</a>.</p>
+  </li>
+  <li>
+    <p>Wait for 24 hours to replicate the release in all the mirrors.</p>
+  </li>
+  <li>
+    <p>Delete old releases from <a href="https://dist.apache.org/repos/dist/dev">dev</a> and [release] (https://dist.apache.org/repos/dist/release) and check for the old release in archive, update the same links in the website for old releases.</p>
+  </li>
+  <li>
+    <p>Upload the release page of ServiceComb Website.</p>
+  </li>
+  <li>
+    <p>Send the announcement mails to dev@servicecomb.apache.org, announce@apache.org</p>
+  </li>
+</ol>
+
+<h2 id="major-steps-for-doing-saga-release">Major Steps for doing Saga Release</h2>
+
+<p><strong><em>Make and Verify the Release</em></strong></p>
+<ol>
+  <li>Clone the saga code.
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-saga.git
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Cut the release using per command to replace all the versions in pom.xml files</p>
+  </li>
+  <li>Create a Tag from the master branch using the version number.
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>find . -name 'pom.xml'|xargs perl -pi -e 's/1.0.0-m2-SNAPSHOT/1.0.0-m2/g'
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Clear all the redundant servicecomb releases in repository.apache.org</p>
+  </li>
+  <li>
+    <p>Add the keys in a reference folder.</p>
+  </li>
+  <li>
+    <p>Update the key path and passphrase in your ~/.m2/settings.xml file.</p>
+  </li>
+  <li>
+    <p>Update the apache account username and password in the settings.xml file.</p>
+  </li>
+  <li>Run the maven deploy command.
+    <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn deploy -DskipTests -Ppassphrase -Prelease
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Once every thing is uploaded then use the staging repo to verify the build using the acceptance test.</p>
+  </li>
+  <li>
+    <p>Share the staging repo with peers to verify on different OS and machines using the demo.</p>
+  </li>
+  <li>
+    <p>If everything is fine then push the tag to master.</p>
+  </li>
+  <li>Close the staging repo is apache repositories.</li>
+</ol>
+
+<p><strong><em>Sign the Releases</em></strong></p>
+
+<ol>
+  <li>
+    <p>Download the source code and distribution from the staging repo.</p>
+  </li>
+  <li>
+    <p>Sign the 2 releases(distribution, src) and checksum.</p>
+  </li>
+  <li>
+    <p>Create a new directory <a href="https://dist.apache.org/repos/dist/dev/servicecomb/servicecomb-saga/">Apache dev Release SVN</a> with release package name and release candidate number. (for example : if you want to release 1.0.0-m2 and this is the third attempt of the release then the folder structure will be <code class="highlighter-rouge">1.0.0-m2/rc03</code>)</p>
+  </li>
+  <li>
+    <p>Upload the release to  directory created in last step.</p>
+  </li>
+  <li>
+    <p>Download all the releases from SVN and verify the signature and checksum.</p>
+  </li>
+</ol>
+
+<p><strong><em>PMC approval</em></strong></p>
+
+<ol>
+  <li>
+    <p>Send the voting mail in dev@servicecomb.apache.org.</p>
+  </li>
+  <li>
+    <p>Wait for 72 hours or unless you get 3 +1 binding vote with no -1 vote. If you get even one -1 binding vote then fix the issue and start again from Step 1.</p>
+  </li>
+  <li>
+    <p>Publish the result of the vote in dev@servicecomb.apache.org.</p>
+  </li>
+</ol>
+
+<p><strong><em>Announcements</em></strong></p>
+
+<ol>
+  <li>
+    <p>Upload the releases to <a href="https://dist.apache.org/repos/dist/release/servicecomb/servicecomb-saga/">Apache release repository</a>.</p>
+  </li>
+  <li>
+    <p>Wait for 24 hours to replicate the release in all the mirrors.</p>
+  </li>
+  <li>
+    <p>Delete old releases from <a href="https://dist.apache.org/repos/dist/dev">dev</a> and [release] (https://dist.apache.org/repos/dist/release) and check for the old release in archive, update the same links in the website for old releases.</p>
+  </li>
+  <li>
+    <p>Upload the release page of ServiceComb Website.</p>
+  </li>
+  <li>
+    <p>Send the announcement mails to dev@servicecomb.apache.org, announce@apache.orgg</p>
+  </li>
+</ol>
+
+<p><strong>NOTE</strong></p>
+<ul>
+  <li>The whole process generally takes 1 weeks to complete assuming you don’t get any -1 from PMC, so please plan the release activity before hand.</li>
+</ul>
+
+        
+      </section>
+
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+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
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content/developers/release-validation-guide/index.html

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+            <h1 class="page__title" itemprop="headline">Release verification guide for ServiceComb
+</h1>
+            
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+        
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#verify-java-chassis" id="markdown-toc-verify-java-chassis">Verify Java Chassis</a>    <ul>
+      <li><a href="#prerequisite" id="markdown-toc-prerequisite">Prerequisite</a></li>
+      <li><a href="#verify-the-hash-and-the-signature" id="markdown-toc-verify-the-hash-and-the-signature">Verify the Hash and the Signature</a></li>
+      <li><a href="#verify-the-source-code" id="markdown-toc-verify-the-source-code">Verify the source code</a></li>
+      <li><a href="#verify-the-staging-repository" id="markdown-toc-verify-the-staging-repository">Verify the Staging Repository</a></li>
+      <li><a href="#verify-integration-with-spring-cloud" id="markdown-toc-verify-integration-with-spring-cloud">Verify integration with Spring Cloud</a></li>
+      <li><a href="#verify-samplesoptional" id="markdown-toc-verify-samplesoptional">Verify Samples(Optional)</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>As apache project, when ServiceComb release new version, need make a vote and invite users and developers to verify its availability, this guide will introduce how to do this work.</p>
+
+<h2 id="verify-java-chassis">Verify Java Chassis</h2>
+<h3 id="prerequisite">Prerequisite</h3>
+<ol>
+  <li>Make sure your network is available;</li>
+  <li>Please check these components had installed:
+    <ul>
+      <li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">JDK1.8</a></li>
+      <li><a href="https://maven.apache.org/download.cgi">Maven 3.x</a></li>
+      <li><a href="https://www.docker.com/get-docker">Docker</a></li>
+    </ul>
+  </li>
+</ol>
+
+<blockquote>
+  <p>Hint: If the OS of environment is Windows, need install <a href="https://docs.docker.com/machine/install-machine/">Docker Machine</a></p>
+</blockquote>
+
+<h3 id="verify-the-hash-and-the-signature">Verify the Hash and the Signature</h3>
+<p>Please find the URL of <strong>Release Candidate</strong> in Vote mail, for example:</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Release Candidate : https://dist.apache.org/repos/dist/dev/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/rc-01/
+</code></pre></div></div>
+
+<p>Open this URL in browser, download the source code end with <code class="highlighter-rouge">src.zip</code>, signature file end with <code class="highlighter-rouge">src.zip.asc</code> and hash file end with <code class="highlighter-rouge">src.zip.sha512</code>, please keep these three files in same folder.</p>
+
+<p>Please find URL of <strong>Key</strong> in Vote mail, for example:</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Keys to verify the Release Candidate : https://dist.apache.org/repos/dist/dev/incubator/servicecomb/KEYS
+</code></pre></div></div>
+
+<p>Open this URL in browser, copy contents into KEYS file, then import:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg <span class="nt">--import</span> KEYS
+</code></pre></div></div>
+
+<p>Then <code class="highlighter-rouge">Mohammad Asif Siddiqui (ServiceComb Code Signing Key) &lt;asifdxtreme@apache.org&gt;</code> will output if imported successfully.</p>
+
+<p>Verify the Signature:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg <span class="nt">--verify</span> xxx-src.zip.asc xxx-src.zip
+</code></pre></div></div>
+
+<p>Then <code class="highlighter-rouge">Good signature from "Mohammad Asif Siddiqui (ServiceComb Code Signing Key) &lt;asifdxtreme@apache.org&gt;"</code> will output if verified successfully.</p>
+
+<p>Verify the Hash:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">sha512sum</span> <span class="nt">-c</span> xxx-src.zip.sha512
+</code></pre></div></div>
+
+<p>Then <code class="highlighter-rouge">OK</code> will output if verified successfully.</p>
+
+<h3 id="verify-the-source-code">Verify the source code</h3>
+<p>Unzip the source code:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>unzip xxx-src.zip
+</code></pre></div></div>
+
+<p>Run test case under source code root:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pit</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>Hint: If the OS of environment is Windows:</p>
+  <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pit</span> <span class="nt">-Pdocker-machine</span>
+</code></pre></div>  </div>
+</blockquote>
+
+<p>Wait all test case check passed, may use 10~30 minutes.</p>
+
+<h3 id="verify-the-staging-repository">Verify the Staging Repository</h3>
+<p>First need delete all ServiceComb cache in local maven repo:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">rm</span> <span class="nt">-rf</span> /root/.m2/repository/org/apache/servicecomb/
+</code></pre></div></div>
+
+<blockquote>
+  <p>Hint: If not the root, please change the path of .m2</p>
+</blockquote>
+
+<p>Please find URL of <strong>Staging Repository</strong> in Vote mail, for example:</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Staging Repository : https://repository.apache.org/content/repositories/orgapacheservicecomb-xxxx/
+</code></pre></div></div>
+
+<p>Then add this Staging Repository address into <code class="highlighter-rouge">settings.xml</code> of maven:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;settings&gt;</span>
+	<span class="nt">&lt;profiles&gt;</span>
+	   <span class="nt">&lt;profile&gt;</span>
+		  <span class="nt">&lt;repositories&gt;</span>
+			<span class="nt">&lt;repository&gt;</span>
+			  <span class="nt">&lt;releases</span> <span class="nt">/&gt;</span>
+			  <span class="nt">&lt;snapshots&gt;</span>
+				<span class="nt">&lt;enabled&gt;</span>false<span class="nt">&lt;/enabled&gt;</span>
+			  <span class="nt">&lt;/snapshots&gt;</span>
+			  <span class="nt">&lt;id&gt;</span>repo.apache.staging<span class="nt">&lt;/id&gt;</span>
+			  <span class="nt">&lt;url&gt;</span>{Staging Repository URL in Vote mail}<span class="nt">&lt;/url&gt;</span>
+			<span class="nt">&lt;/repository&gt;</span>
+		  <span class="nt">&lt;/repositories&gt;</span>
+		  <span class="nt">&lt;pluginRepositories&gt;</span>
+			<span class="nt">&lt;pluginRepository&gt;</span>
+			  <span class="nt">&lt;releases</span> <span class="nt">/&gt;</span>
+			  <span class="nt">&lt;snapshots&gt;</span>
+				<span class="nt">&lt;enabled&gt;</span>false<span class="nt">&lt;/enabled&gt;</span>
+			  <span class="nt">&lt;/snapshots&gt;</span>
+			  <span class="nt">&lt;id&gt;</span>repo.apache.staging<span class="nt">&lt;/id&gt;</span>
+			  <span class="nt">&lt;url&gt;</span>{Staging Repository URL in Vote mail}<span class="nt">&lt;/url&gt;</span>
+			<span class="nt">&lt;/pluginRepository&gt;</span>
+		  <span class="nt">&lt;/pluginRepositories&gt;</span>
+		  <span class="nt">&lt;id&gt;</span>staging<span class="nt">&lt;/id&gt;</span>
+		<span class="nt">&lt;/profile&gt;</span>
+	<span class="nt">&lt;/profiles&gt;</span>
+<span class="nt">&lt;/settings&gt;</span>
+</code></pre></div></div>
+
+<p>After that, enter <strong>demo folder under the source code(not root folder of source code)</strong> and run:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>Hint: If the OS of environment is Windows:</p>
+  <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean <span class="nb">install</span> <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span> <span class="nt">-Pdocker-machine</span>
+</code></pre></div>  </div>
+</blockquote>
+
+<p><strong>When test cases are running, we can see the Java Chassis dependencies will download from Apache Staging Repository that had configured:</strong></p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Downloading: https://repository.apache.org/content/repositories/orgapacheservicecomb-xxxx/xxxx.pom
+</code></pre></div></div>
+
+<p>Wait all test case check passed, may use 5~15 minutes.</p>
+
+<h3 id="verify-integration-with-spring-cloud">Verify integration with Spring Cloud</h3>
+<p>Please clone the latest source code of Company demo project from https://github.com/ServiceComb/ServiceComb-Company-WorkShop , then checkout branch of 1.x :</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git
+git checkout 1.x
+</code></pre></div></div>
+
+<p>Modify the configuration of <code class="highlighter-rouge">&lt;java-chassis.version&gt;</code> in <code class="highlighter-rouge">pom.xml</code> under  source code root folder to current releasing version, such as 1.0.0-m2 :</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;properties&gt;</span>
+  <span class="nt">&lt;java-chassis.version&gt;</span>1.0.0-m2<span class="nt">&lt;/java-chassis.version&gt;</span>
+<span class="nt">&lt;/properties&gt;</span>
+</code></pre></div></div>
+
+<p>Run test case under source code root:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean verify <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>Hint: If the OS of environment is Windows:</p>
+  <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn clean verify <span class="nt">-Pdocker</span> <span class="nt">-Pstaging</span> <span class="nt">-Pdocker-machine</span>
+</code></pre></div>  </div>
+</blockquote>
+
+<p>Wait all test case check passed, may use 5~10 minutes.</p>
+
+<h3 id="verify-samplesoptional">Verify Samples(Optional)</h3>
+<p>In samples folder of source code, there are many java chassis sample, we can choose some of them do verification such as BMI; you can read README.md in each sample in order to known how to run.</p>
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content/developers/setup-committer-rights/index.html

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+    <meta itemprop="headline" content="Set Up Write Access for Committer">
+    <meta itemprop="description" content="How to set up repo write rights for committer">
+    
+    <meta itemprop="dateModified" content="December 22, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Set Up Write Access for Committer
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#authorize-your-apache-account" id="markdown-toc-authorize-your-apache-account">Authorize your Apache account</a></li>
+  <li><a href="#authorize-your-github-account" id="markdown-toc-authorize-your-github-account">Authorize your Github account</a></li>
+  <li><a href="#join-apache-github-organization" id="markdown-toc-join-apache-github-organization">Join Apache Github organization</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Congratulations for being a valuable committer to Apache ServiceComb projects!</p>
+
+<p>This article will guide you through setting up write access to <a href="https://github.com/apache?utf8=%E2%9C%93&amp;q=servicecomb&amp;type=&amp;language=">Apache ServiceComb repositories</a> hosted on Github.</p>
+
+<p>You need to complete three simple steps to obtain such rights, if you are already an Apache ServiceComb committer:</p>
+<ul>
+  <li>Authorize your Apache account</li>
+  <li>Authorize your Github account</li>
+  <li>Join Apache Github organization</li>
+</ul>
+
+<p>Open <a href="https://gitbox.apache.org/setup/">https://gitbox.apache.org/setup/</a> in your favorite browser and you should see a page like below.</p>
+
+<p><img src="/assets/images/gitbox/apache-pre-auth.png" alt="pre authorization" class="align-center" /></p>
+
+<p>Let's get started!</p>
+
+<h2 id="authorize-your-apache-account">Authorize your Apache account</h2>
+<p>Click <code class="highlighter-rouge">Start ASF Oauth</code> link and follow the instructions on the page to log in with your Apache account.</p>
+
+<p><img src="/assets/images/gitbox/apache-auth.png" alt="apache account authorization" class="align-center" /></p>
+
+<h2 id="authorize-your-github-account">Authorize your Github account</h2>
+<p>Before proceeding, enable <a href="https://github.com/settings/security">2FA on Github</a> for your account.</p>
+
+<p>Your Github account security page should look like the image below, if 2FA is set up successfully.</p>
+
+<p><img src="/assets/images/gitbox/github-2fa.png" alt="github 2FA" class="align-center" /></p>
+
+<p>If you need help, please refer to <a href="https://help.github.com/articles/securing-your-account-with-two-factor-authentication-2fa/">Github 2FA help page</a></p>
+
+<p>Once your Github 2FA is set up, click <code class="highlighter-rouge">Auth on GitHub</code> and follow the instructions to authorize your Github account.</p>
+
+<p><img src="/assets/images/gitbox/github-auth.png" alt="github account authorization" class="align-center" /></p>
+
+<h2 id="join-apache-github-organization">Join Apache Github organization</h2>
+<p>Open <a href="https://id.apache.org/">https://id.apache.org/</a> and log into your Apache account.</p>
+
+<p>Once logged in, fill in your github username under <em>Your Github Username</em> section like below and save your changes:</p>
+
+<p><img src="/assets/images/gitbox/link-apache-github-id.png" alt="github account linking" class="align-center" /></p>
+
+<p>An organisational invite will be sent to you shortly thereafter (within 30 minutes). 
+You may visit <a href="https://github.com/apache/">Apache on Github</a> to see if you have an invitation pending. It may take up to 30 minutes.</p>
+
+<p>Accept the invitation and wait till you are added as an Apache ServiceComb project committer (you will be notified by email).</p>
+
+<p>Once your write access is granted, you will see something like the image below:</p>
+
+<p><img src="/assets/images/gitbox/apache-post-auth.png" alt="post authorization" class="align-center" /></p>
+
+<p>Congratulations! Now you have write access to Apache ServiceComb project, under which you are able to merge pull requests.</p>
+
+        
+      </section>
+
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+        
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+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Get started</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/setup-committer-rights.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
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+      </ul>
+    </div>
+  </div>
+</div>
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content/developers/setup-develop-environment/index.html

diff --git a/content/developers/setup-develop-environment/index.html b/content/developers/setup-develop-environment/index.html
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+<meta property="og:title" content="Setup Developing Environment">
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+  </script>
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+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
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+<!-- end SEO -->
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+    <meta itemprop="dateModified" content="June 24, 2017">
+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Setup Developing Environment
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="install-required-tools">Install required tools</h2>
+<p>Before you start, make sure you have the following tools installed:</p>
+<ul>
+  <li><strong>Git</strong>，please refer to <a href="https://git-scm.com/book/en/v2/Getting-Started-Installing-Git" target="_blank">Install Git</a></li>
+  <li><strong>JDK 1.8</strong>，please refer to <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">Install JDK</a></li>
+  <li><strong>Maven 3.x</strong>，please refer to <a href="https://maven.apache.org/install.html" target="_blank">Install Maven</a></li>
+  <li><strong>Docker</strong>，please refer to <a href="https://docs.docker.com/engine/installation/" target="_blank">Install Docker</a></li>
+  <li><strong>Service Center</strong>, please refer to <a href="/users/setup-environment/#运行service-center">Install Service Center</a></li>
+  <li><strong>IntelliJ Idea IDE</strong>(optional, you can use any IDE you like, e.g. eclipse), please refer to<a href="https://www.jetbrains.com/help/idea/installing-and-launching.html" target="_blank">Install IntelliJ</a></li>
+</ul>
+
+<h2 id="setup-git">Setup git</h2>
+<ol>
+  <li>
+    <p>Get a Github account. The ServiceComb projects is hosted on Github, so you will need a Github account. You can goto <a href="https://github.com/join?source=header-home">https://github.com/join?source=header-home</a> for signup. Skip this if you already own an Github account. You can login on <a href="https://github.com/login?return_to=%2Fjoin%3Fsource%3Dheader-home">https://github.com/login?return_to=%2Fjoin%3Fsource%3Dheader-home</a> after you finished the signup.</p>
+  </li>
+  <li>
+    <p>Configure Git. Configure personal information and setup git for push without username/password.
+Configure personal information:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git config <span class="nt">--global</span> user.name &lt;your-user-name&gt;
+git config <span class="nt">--global</span> user.email &lt;your-email-address&gt;
+</code></pre></div>    </div>
+
+    <p>Substitute &lt;your-user-name&gt;和&lt;your-email-address&gt; with your name and email. Refer<a href="https://stackoverflow.com/a/8588786" target="_blank">Git push without username and password</a>to setup pushing without username/password.</p>
+  </li>
+  <li>
+    <p>Get the source code. For example, to get <a href="https://github.com/apache/servicecomb-java-chassis.git">ServiceComb-Java-Chassis</a>, execute the following command:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-java-chassis.git
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="configure-ide">Configure IDE</h2>
+<p>There are many Java IDEs around, like Eclipse, IntelliJ IDEA and STS, etc. We suggest to use IntelliJ IDEA, it’s community edition is good enough for daily usage. After you installed IntelliJ IDEA, follow <a href="https://www.jetbrains.com/help/idea/installing-and-launching.html#d325787e291">Initial Setup</a> for basic configuration. For frequently used shortcuts, <a href="https://www.jetbrains.com/help/idea/keyboard-shortcuts-you-cannot-miss.html">Cannot Miss Shortcuts</a></p>
+
+<p>The Java Chassis and Saga project uses <a href="https://github.com/google/styleguide">Google Code Style</a>. You can find the settings file under <code class="highlighter-rouge">etc</code> directory which can be imported to IDEA. There is also a settings file for Eclipse under the same directory.</p>
+
+<p><img src="/assets/images/intellij.code.style.3.png" alt="code style files" class="align-center" /></p>
+
+<aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#install-required-tools" id="markdown-toc-install-required-tools">Install required tools</a></li>
+  <li><a href="#setup-git" id="markdown-toc-setup-git">Setup git</a></li>
+  <li><a href="#configure-ide" id="markdown-toc-configure-ide">Configure IDE</a>    <ul>
+      <li><a href="#intellij-idea-configuration" id="markdown-toc-intellij-idea-configuration">IntelliJ IDEA Configuration</a></li>
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+  </li>
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+</ul>
+
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+</aside>
+
+<h3 id="intellij-idea-configuration">IntelliJ IDEA Configuration</h3>
+<p>Configure <a href="https://www.jetbrains.com/idea/download/">IntelliJ IDEA</a></p>
+
+<ol>
+  <li>
+    <p>Open IntelliJ Settings page
+<img src="/assets/images/intellij.code.style.4.png" alt="IntelliJ Settings" class="align-center" /></p>
+  </li>
+  <li>
+    <p>Import the coding style settings file <code class="highlighter-rouge">etc/intellij-java-google-style.xml</code>
+<img src="/assets/images/intellij.code.style.1.png" alt="import code style" class="align-center" /></p>
+  </li>
+  <li>
+    <p>Open a modified but uncommited file, then Choose [Code] &gt; [Show Reformat File Dialog]
+<img src="/assets/images/intellij.code.style.5.png" alt="reformat file dialog" class="align-center" /></p>
+  </li>
+  <li>
+    <p>Choose [Only VCS changed text], then click [Run]
+<img src="/assets/images/intellij.code.style.2.png" alt="reformat options" class="align-center" /></p>
+  </li>
+</ol>
+
+<p>Just run [Reformat code] (Ctrl+Alt+L) afterwards to format the code.</p>
+
+<p>For more IntelliJ usages, please check <a href="https://www.jetbrains.com/help/idea/tutorials.html">IntelliJ tutorial</a>。</p>
+
+<h2 id="next">Next</h2>
+
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content/developers/sonarcloud-how-to/index.html

diff --git a/content/developers/sonarcloud-how-to/index.html b/content/developers/sonarcloud-how-to/index.html
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+    
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+        
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+        
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+    
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+        
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+        
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+        
+
+        
+      </li>
+    
+  </ul>
+</nav>
+
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+  
+  </div>
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+    <meta itemprop="headline" content="How to Use SonarCloud">
+    <meta itemprop="description" content="SonarCloud集成指南">
+    
+    <meta itemprop="dateModified" content="November 15, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">How to Use SonarCloud
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#steps" id="markdown-toc-steps">Steps</a>    <ul>
+      <li><a href="#about-shallow-clone" id="markdown-toc-about-shallow-clone">About Shallow Clone</a></li>
+      <li><a href="#about-pr" id="markdown-toc-about-pr">About PR</a></li>
+    </ul>
+  </li>
+  <li><a href="#references" id="markdown-toc-references">References</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>This guide helps you to integrate SonarCloud in your Travis build.</p>
+
+<h2 id="steps">Steps</h2>
+
+<ol>
+  <li>First, you should be member of Apache Orgnization in Github.</li>
+  <li>Login to  <a href="https://sonarcloud.io">sonarcloud.io</a> with your Github credentials.</li>
+  <li>Create an JIRA ticket in  <a href="https://issues.apache.org/jira/projects/INFRA/">Infrastructure </a> asking to create a project at SonarCloud, here is an <a href="https://issues.apache.org/jira/browse/INFRA-19444">example</a>. You should provde Github repo url, project-key (the id of your project in SonarCloud), Github id for the Admin of this project, generally speaking that’s yours.</li>
+  <li>Wait for the INFRA team creating the project, after that you will see it at SonarCloud.</li>
+  <li>Follow the SonarCloud instructions modify project’s <code class="highlighter-rouge">.travis.yml</code></li>
+</ol>
+
+<h3 id="about-shallow-clone">About Shallow Clone</h3>
+
+<p>Travis <a href="https://docs.travis-ci.com/user/customizing-the-build/#git-clone-depth">use shallow clone by default</a>, and SonarCloud needs commit information, so you need to disable shallow clone:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">git</span><span class="pi">:</span>
+  <span class="na">depth</span><span class="pi">:</span> <span class="no">false</span>
+</code></pre></div></div>
+
+<h3 id="about-pr">About PR</h3>
+
+<p>Travis doesn’t support SonarCloud in PR build, you should modify your build script like this:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">echo</span> <span class="s2">"TRAVIS_PULL_REQUEST=</span><span class="nv">$TRAVIS_PULL_REQUEST</span><span class="s2">"</span>
+<span class="k">if</span> <span class="o">[</span> <span class="s2">"</span><span class="nv">$TRAVIS_PULL_REQUEST</span><span class="s2">"</span> <span class="o">==</span> <span class="s2">"false"</span> <span class="o">]</span><span class="p">;</span> <span class="k">then
+  </span><span class="nb">echo</span> <span class="s2">"Not a pull request build, running build with sonar"</span>
+  mvn ... sonar:sonar <span class="nt">-Dsonar</span>.projectKey<span class="o">=</span>&lt;project-key&gt;
+<span class="k">else
+  </span><span class="nb">echo</span> <span class="s2">"Pull request build or local build"</span>
+  mvn ...
+<span class="k">fi</span><span class="p">;</span>
+</code></pre></div></div>
+
+<h2 id="references">References</h2>
+
+<ul>
+  <li><a href="https://cwiki.apache.org/confluence/display/INFRA/SonarQube+Analysis">Apache CWiki - SonarQube Analysis</a></li>
+  <li><a href="https://docs.travis-ci.com/user/sonarcloud/">Travis - SonarCloud</a></li>
+</ul>
+
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+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/sonarcloud-how-to.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
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content/developers/submit-codes/index.html

diff --git a/content/developers/submit-codes/index.html b/content/developers/submit-codes/index.html
new file mode 100644
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@@ -0,0 +1,688 @@
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+    }
+  </script>
+
+
+
+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
+
+
+
+
+<!-- end SEO -->
+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
+<!-- http://t.co/dKP3o1e -->
+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
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+    <meta itemprop="headline" content="Howto Submit Code">
+    <meta itemprop="description" content="Howto submit code for SerivceComb">
+    
+    <meta itemprop="dateModified" content="September 08, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Howto Submit Code
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#contributing" id="markdown-toc-contributing">Contributing</a></li>
+  <li><a href="#run-tests" id="markdown-toc-run-tests">Run tests</a></li>
+  <li><a href="#how-to-submit-a-pr" id="markdown-toc-how-to-submit-a-pr">How to submit a PR</a>    <ul>
+      <li><a href="#fork-repository" id="markdown-toc-fork-repository">Fork repository</a></li>
+      <li><a href="#setup-local-repository" id="markdown-toc-setup-local-repository">Setup local repository</a></li>
+      <li><a href="#create-pr" id="markdown-toc-create-pr">Create PR</a></li>
+      <li><a href="#resolve-conflicts" id="markdown-toc-resolve-conflicts">Resolve conflicts</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="contributing">Contributing</h2>
+<p>ServiceComb is still growing and we hope that more will join us to share this. There are many ways to contribute:</p>
+<ul>
+  <li>Improve documents. Help us improve the documents on this site or the API documentation. For the documents on this site, you can find links <strong>Report a Doc Issue</strong> or <strong>Edit This Page on Github</strong> to start.</li>
+  <li>
+    <p>Implement feature request or fix bugs. You can find all the feature request and bug reports on the projects’ issues pages. Take <a href="https://github.com/apache/servicecomb-saga/issues">Saga</a> as an example, issues will be labeled as <strong>enhancement</strong> or <strong>bug</strong>, you can choose the ones you are interested in. Bug reports and new feature requests are also welcomed.</p>
+
+    <p><img src="/assets/images/find-features-by-example.png" alt="Find Features" class="align-center" /></p>
+  </li>
+</ul>
+
+<h2 id="run-tests">Run tests</h2>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Before submitting code, make sure that you have properly tested the functionality and verified the implementation according to the auto test section in README.
+</code></pre></div></div>
+
+<h2 id="how-to-submit-a-pr">How to submit a PR</h2>
+<p>　　It’s quite convenient to submit a <a href="https://help.github.com/articles/about-pull-requests/">Pull Request(PR)</a> on <a href="https://github.com/search?q=org%3Aapache+servicecomb">Github</a>. Take the <a href="https://github.com/apache/servicecomb-website">apache/servicecomb-website</a> as an example:</p>
+
+<h3 id="fork-repository">Fork repository</h3>
+
+<p>　　Visit the apache/servicecomb-website project’s <a href="https://github.com/apache/servicecomb-website">github page</a>, click <code class="highlighter-rouge">Fork</code> button on the right left cornor.</p>
+
+<p><img src="/assets/images/fork-repo.jpg" alt="Fork Repository" class="align-center" /></p>
+
+<h3 id="setup-local-repository">Setup local repository</h3>
+
+<ul>
+  <li>
+    <p>Clone the source code to local machine:</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/&lt;your_github_name&gt;/servicecomb-website.git
+</code></pre></div>    </div>
+
+    <p>Note: substitute &lt;your_github_name&gt; with your github username.</p>
+
+    <p>After the clone is done, the origin remote will point to the default branch of the cloned repository.</p>
+  </li>
+  <li>
+    <p>Add apache/servicecomb-website as upstream remote:</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd  </span>servicecomb-website
+git remote add upstream https://github.com/apache/servicecomb-website.git
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Check the local repository’s remotes</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git remote <span class="nt">-v</span>
+origin https://github.com/&lt;your_github_name&gt;/servicecomb-website.git <span class="o">(</span>fetch<span class="o">)</span>
+origin    https://github.com/&lt;your_github_name&gt;/servicecomb-website.git <span class="o">(</span>push<span class="o">)</span>
+upstream  https://github.com/apache/servicecomb-website.git <span class="o">(</span>fetch<span class="o">)</span>
+upstream  https://github.com/apache/servicecomb-website.git <span class="o">(</span>push<span class="o">)</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Create a new branch to start working</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git checkout <span class="nt">-b</span> &lt;your_branch_name&gt;
+</code></pre></div>    </div>
+
+    <p>Note: replace &lt;your_branch_name&gt; with an actual branch name at your choice, like feature-foo/bugfix-bar
+Now you can start coding.</p>
+  </li>
+  <li>
+    <p>Push the changes to a remote repository</p>
+
+    <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git commit <span class="nt">-a</span> <span class="nt">-m</span> <span class="s2">"&lt;you_commit_message&gt;"</span>
+git push origin &lt;your_branch_name&gt;
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>　For more on git usages, please visit<a href="https://www.atlassian.com/git/tutorials/setting-up-a-repository">Git tutorial</a>.</p>
+
+<h3 id="create-pr">Create PR</h3>
+<p>Goto your github page, find the apache/servicecomb-website project, swich to the branch you just pushed, click on <code class="highlighter-rouge">New pull request</code> and then <code class="highlighter-rouge">Create pull request</code>, see the image below:</p>
+
+<p class="figure-caption"><img src="/assets/images/new-pr.jpg" alt="New Pull Request" class="align-center" />
+fig-1 New pull request</p>
+
+<p class="figure-caption"><img src="/assets/images/create-pr.jpg" alt="Create Pull Request" class="align-center" />
+fig-2 Create pull request</p>
+
+<p>Congrautulations, now you have succesfully submitted a PR. For more on PR, please read <a href="https://help.github.com/categories/collaborating-with-issues-and-pull-requests/">collaborating-with-issues-and-pull-requests</a> 。</p>
+
+<h3 id="resolve-conflicts">Resolve conflicts</h3>
+<p>When a same piece of file is edited by multiple person simultaneously, conflicts can occur. It can be resolved as follow:</p>
+
+<ol>
+  <li>Switch to the master branch
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git checkout master
+</code></pre></div>    </div>
+  </li>
+  <li>Pull the upstream’s master branch
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git pull upstream master
+</code></pre></div>    </div>
+  </li>
+  <li>Switch back to the branch we are working on(e.g. fix)
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git checkout fix 
+</code></pre></div>    </div>
+  </li>
+  <li>Rebase the working branch onto the master branch
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git rebase <span class="nt">-i</span> master
+</code></pre></div>    </div>
+    <p>A list of commits will be listed on your text editor. Normally we can just save and exit.
+Git will now apply the commits one by one onto the master branch until it encounters a conflict. When this happens, the rebase process is paused. We need to resolve the conflicts, then execute</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git add <span class="nb">.</span>
+git rebase <span class="nt">--continue</span>
+</code></pre></div>    </div>
+    <p>Repeat this process until all commits are successfully applied. And finally run</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git push <span class="nt">-f</span> origin fix
+</code></pre></div>    </div>
+    <p>to push the resolved branch to remote origin</p>
+  </li>
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+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/submit-codes.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
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content/developers/team/index.html

diff --git a/content/developers/team/index.html b/content/developers/team/index.html
new file mode 100644
index 0000000..b0db2b3
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@@ -0,0 +1,855 @@
+<!doctype html>
+<!--
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+    }
+  </script>
+
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+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
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+
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+<!-- end custom head snippets -->
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+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->
+    <div class="masthead" onmouseleave="$('#childrenShow').css('display', 'none')">
+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+            
+          
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+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
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+              
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+                
+                <li><a href="/docs/getting-started/" class="">Get started</a></li>
+                
+                <li><a href="/docs/users/" class="">Docs</a></li>
+                
+                <li><a href="/slides/" class="">Video</a></li>
+                
+                <li><a href="/faqs/" class="">FAQ</a></li>
+                
+              </ul>
+            </li>
+          
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a class="active" href="/developers/contributing">Community</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
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+            
+          
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+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/release/">Downloads</a>
+                
+              </li>
+            
+          
+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
+          
+            
+            <a href=/cn/developers/team/>中文</a>
+          
+        </div>
+      </nav>
+    </div>
+  </div>
+</div>
+
+
+    
+
+
+
+<div id="main" role="main">
+  
+  <div class="sidebar sticky">
+      
+      <div class="back-to-home"><a href="/">Home</a> > ServiceComb Develop Team</div>
+      
+  
+  
+    
+      
+      
+      
+    
+    
+      
+
+<nav class="nav__list">
+  
+  <input id="ac-toc" name="accordion-toc" type="checkbox" />
+  <label for="ac-toc">Toggle Menu</label>
+  <ul class="nav__items">
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+        
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+          <a href="/developers/"><span class="nav__sub-title nav__sub-title-with-url">Projects</span></a>
+        
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+    
+      <li>
+        
+          
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+          <a href="/developers/team/"><span class="nav__sub-title nav__sub-title-with-url">Team</span></a>
+        
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+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/contributing"><span class="nav__sub-title nav__sub-title-with-url">Contributing to Apache ServiceComb</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/becomming-a-commiter"><span class="nav__sub-title nav__sub-title-with-url">Becoming A Committer of Apache ServiceComb</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/setup-develop-environment/"><span class="nav__sub-title nav__sub-title-with-url">Develop Environment Setup</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/submit-codes/"><span class="nav__sub-title nav__sub-title-with-url">Code Submit Guide</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/use-jira/"><span class="nav__sub-title nav__sub-title-with-url">How to Use JIRA</span></a>
+        
+
+        
+      </li>
+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/setup-committer-rights/"><span class="nav__sub-title nav__sub-title-with-url">Set Up Write Access for Committer</span></a>
+        
+
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+    
+      <li>
+        
+          
+          
+
+          <a href="/developers/release-guide/"><span class="nav__sub-title nav__sub-title-with-url">How to Release in Apache</span></a>
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+    
+      <li>
+        
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+          
+
+          <a href="/developers/release-validation-guide/"><span class="nav__sub-title nav__sub-title-with-url">How to verify Apache Release</span></a>
+        
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+    
+      <li>
+        
+          
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+
+          <a href="/developers/sonarcloud-how-to/"><span class="nav__sub-title nav__sub-title-with-url">How to Use SonarCloud</span></a>
+        
+
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Develop Team">
+    <meta itemprop="description" content="ServiceComb Team">
+    
+    <meta itemprop="dateModified" content="June 01, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Develop Team
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>This page lists who we are. By all means add yourself to the list - lets sort it in alphabetical order</p>
+
+<ul>
+  <li>Committers</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>Apache ID</th>
+      <th>Name</th>
+      <th>Organization</th>
+      <th>PPMC</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>acsukesh</td>
+      <td>Sukesh A C</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>asifdxtream</td>
+      <td>Mohammad Asif Siddiqui</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>chanjarster</td>
+      <td>Daniel Qian</td>
+      <td>NewCapec</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>cherrylzhao</td>
+      <td>Zhao Jun</td>
+      <td>JD.com</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>ericlee</td>
+      <td>Li Dagang (Eric)</td>
+      <td>Tencent</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>jbonofre</td>
+      <td>Jean-Baptiste Onofre</td>
+      <td>Talend</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>liubao68</td>
+      <td>Liu Bao</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>little-cui</td>
+      <td>Cui Yihua</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>mabin</td>
+      <td>Ma Bin</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>ningjiang</td>
+      <td>Jiang Ning (Willem)</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>rvs</td>
+      <td>Roman Shaposhnik</td>
+      <td>Stealth</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>seanyinx</td>
+      <td>Yin Xiang (Sean)</td>
+      <td>Syswin</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>tnachen</td>
+      <td>Timothy Chen</td>
+      <td>Hyperpilot</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>wujimin</td>
+      <td>Wu Jimin</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>yaohaishi</td>
+      <td>Yao Haishi</td>
+      <td>Huawei</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>yangbor</td>
+      <td>Yang Bo</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zenlinTechnofreak</td>
+      <td>Lin Zhinan</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhangqi</td>
+      <td>Zhang qi</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhengyangyong</td>
+      <td>Zheng Yangyong</td>
+      <td>Huawei</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhfeng</td>
+      <td>Feng Zheng</td>
+      <td>Redhat</td>
+      <td>*</td>
+    </tr>
+    <tr>
+      <td>zhanglei</td>
+      <td>Zhang Lei</td>
+      <td>BOCO</td>
+      <td> </td>
+    </tr>
+  </tbody>
+</table>
+
+<ul>
+  <li>Contributors:</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>Github ID</th>
+      <th>Name</th>
+      <th>Organization</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>aseTo2016</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>crystaldust</td>
+      <td>Ju Zheng</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>imlidian</td>
+      <td>Li Dian</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>imlijinting</td>
+      <td>Li Jinting</td>
+      <td>PICC</td>
+    </tr>
+    <tr>
+      <td>jeremyxu2010</td>
+      <td>Xu Xinjie</td>
+      <td>Tencent</td>
+    </tr>
+    <tr>
+      <td>jyseanl</td>
+      <td>Sean Li</td>
+      <td>Pactera</td>
+    </tr>
+    <tr>
+      <td>KomachiSion</td>
+      <td>Yang Yi</td>
+      <td>JD.com</td>
+    </tr>
+    <tr>
+      <td>laijianbin</td>
+      <td>Lai Jianbin</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>lijasonvip</td>
+      <td>Li bo</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>Lionelpang</td>
+      <td>Pang Mingshi</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>liuzhenyang</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>maheshrajus</td>
+      <td>Mahesh Raju Somalaraju</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>mt-monster</td>
+      <td> </td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>oliugian</td>
+      <td>Fu Chungen</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>sjh0027</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>SingleX</td>
+      <td>Gao Xing</td>
+      <td>CaiNiao</td>
+    </tr>
+    <tr>
+      <td>TankTian</td>
+      <td>Tian Min</td>
+      <td>Huawei</td>
+    </tr>
+    <tr>
+      <td>tuohai666</td>
+      <td>Zhang Yonglun</td>
+      <td>JD.com</td>
+    </tr>
+    <tr>
+      <td>vibakar</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>weichao666</td>
+      <td>Wei Chao</td>
+      <td>ISoftStone</td>
+    </tr>
+    <tr>
+      <td>withLin</td>
+      <td>Fu JinLin</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>wuzunqian</td>
+      <td>Wu Zunqian</td>
+      <td>Yongyou</td>
+    </tr>
+    <tr>
+      <td>xuyiyun0929</td>
+      <td>Xu Yiyun</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>xiaoyimei</td>
+      <td>Xiao Yimei</td>
+      <td>Changhong</td>
+    </tr>
+    <tr>
+      <td>yhs0092</td>
+      <td> </td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>zhanglongchun</td>
+      <td>Zhang LongChun</td>
+      <td> </td>
+    </tr>
+    <tr>
+      <td>zhang2014</td>
+      <td>Zhang Jian</td>
+      <td>OneAPM</td>
+    </tr>
+    <tr>
+      <td>zhuhoudong</td>
+      <td>Zhu Houdong</td>
+      <td> </td>
+    </tr>
+  </tbody>
+</table>
+
+        
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+
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+        <p class="header">Resources</p>
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+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
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+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/team.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
+        </li>
+      </ul>
+    </div>
+  </div>
+</div>
+<div class="page__footer-bottom">
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content/developers/use-jira/index.html

diff --git a/content/developers/use-jira/index.html b/content/developers/use-jira/index.html
new file mode 100644
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--- /dev/null
+++ b/content/developers/use-jira/index.html
@@ -0,0 +1,598 @@
+<!doctype html>
+<!--
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+    <meta charset="utf-8">
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+<title>Howto Use JIRA - Apache ServiceComb</title>
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+<meta property="og:title" content="Howto Use JIRA">
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+            <h1 class="page__title" itemprop="headline">Howto Use JIRA
+</h1>
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+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#jira-introduction" id="markdown-toc-jira-introduction">JIRA Introduction</a></li>
+  <li><a href="#login-jira" id="markdown-toc-login-jira">Login JIRA</a></li>
+  <li><a href="#view-issues" id="markdown-toc-view-issues">View issues</a></li>
+  <li><a href="#create-issue" id="markdown-toc-create-issue">Create issue</a></li>
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+</aside>
+
+<h2 id="jira-introduction">JIRA Introduction</h2>
+<p>JIRA is a task and issue tracking system of Atlassian. It is widely used in defect tracking, customer practice, demand collection, process approval, task tracking, project tracking and agile management. ServiceComb uses JIRA for bug and task tracking. This article will briefly describe how to use JIRA during the development of ServiceComb.</p>
+
+<h2 id="login-jira">Login JIRA</h2>
+<p>Open the [JIRA registration page] (https://issues.apache.org/jira/secure/Signup!default.jspa) in your browser, fill in your personal email address, name and other registration information to register. Log in and enter the [ServiceComb project] after registration (https://issues.apache.org/jira/projects/SCB/)</p>
+
+<h2 id="view-issues">View issues</h2>
+<p>After logging in to JIRA, the left panel is followed by Kanban, Releases, Reports, Issues, Components. Kanban content is shown below, showing the tasks that need to be completed (73 To Do), 3 In Progress and resolved. Task (79 Done), all task numbers start with SCB (short for ServiceComb), you can click the taskbar to view the details of each task.</p>
+
+<p><img src="/assets/images/kanban.png" alt="" class="align-center" /></p>
+
+<p>​Click on Issues in the left panel to see all the tasks and support custom filtering rules for filtering. Click on View all issues and filters in the upper right corner to filter. The default filtering rules include task type, task progress, responsible person, current status. Etc., you can also use the Advanced feature for advanced filtering.</p>
+
+<p><img src="/assets/images/filter.png" alt="" class="align-center" /></p>
+
+<h2 id="create-issue">Create issue</h2>
+
+<p>​Click Create to create an issue. When you create it, you need to select the issue type, including Task, Bug, Feature, Improvement, etc. After selecting the type, simply describe the issue content in the Summary. You need to fill in more content in the Description. It should be noted that ServiceComb contains four sub-projects, namely Java Chassis, Saga, Service-Center and website, so when creating an issue, you need to select the corresponding Component to specify which sub-project the issue belongs to.</p>
+
+<p><img src="/assets/images/issue.png" alt="" class="align-center" /></p>
+
+<p>​After creating an issue, you can assign the issue to yourself, start the task Start Progress, and wait for the problem to be resolved after the Resolve Issue or Close Issue, as shown below:</p>
+
+<p><img src="/assets/images/progress.png" alt="" class="align-center" /></p>
+
+<p>​To solve the issue by submitting the code, you need to start with the SCB number of the issue on the title of the created PR, as shown in the following figure [SCB-327]</p>
+
+<p><img src="/assets/images/pr.png" alt="" class="align-center" /></p>
+
+<p>​For more information on how to use JIRA, please refer to <a href="https://confluence.atlassian.com/jiracoreserver076/getting-started-as-a-user-945112029.html">Official Document</a>.</p>
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+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_developers/use-jira.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
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content/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/index.html

diff --git a/content/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/index.html b/content/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/index.html
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+    <meta itemprop="datePublished" content="October 29, 2018">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>Apache ServiceComb Meetup</strong></p>
+
+<hr />
+
+<p>Three Apache experts from Apache Software Foundation (ASF) with ServiceComb Team host an Apache ServiceComb Meetup at the Shanghai World Expo Exhibition and Convention Center.  (Shanghai, China) from 13:30-16:50 PM on Friday, October 12. According to the session, eight-speaker presents six topics about Interpretation of the Apache Way, Roadmap of the Apache ServiceComb,  Exploration of Service Mesh Sharing, Hands-on Experience with Fast Microservices Programming, etc. About 50 participants attended the session on-site, and about 600 participants watched the session online.  Meetings with an open, discussion-oriented atmosphere.</p>
+
+<p><strong>《The Apache Way》</strong></p>
+
+<p><a href="/assets/slides/20181012/EN/1_The_Apache_Way.pdf">PDF</a></p>
+
+<p><strong>Roman Shaposhnik, Justin Mclean, Craig Russell:</strong> The Apache Software Foundation (ASF) is the world’s largest open source foundation with more than 300 open source projects, covering big data, cloud computing, servers and web frameworks, build management, content management, IoT, and more areas.  Three experts from ASF will talk about the history and development of the ASF, its operation model, and will elaborate on the core ideas of the ASF – The Apache Way.This session will also cover the compliance rules and their meanings for Apache projects. And introduce the Apache Incubator project and its standard procedures. The presenter will talk about how open-source projects can develop into communities through the Apache Incubator project, and how these projects can eventually become top projects.</p>
+
+<p><img src="/assets/images/hc2018/1.jpeg" alt="1" /></p>
+
+<hr />
+
+<p><strong>《Latest Roadmap of the Apache ServiceComb(incubating) Community》</strong></p>
+
+<p><a href="/assets/slides/20181012/EN/2_ApacheServiceComb(Incubating)Community_Roadmap.pdf">PDF</a></p>
+
+<p><strong>Jiang Ning:</strong> This session will introduce the overall evolutionary roadmap of technology for the ServiceComb project and its latest development within the Apache Software Foundation.</p>
+
+<p><img src="/assets/images/hc2018/2.jpeg" alt="2" /></p>
+
+<hr />
+
+<p><strong>《ServiceComb’s Exploration of Service Mesh》</strong>   <br />
+<a href="/assets/slides/20181012/EN/4_ServiceComb’s_Exploration_of_Service_Mesh.pdf">PDF</a></p>
+
+<p><strong>Tian Xiaoliang:</strong> This session will introduce the efforts made by ServiceComb to stay compatible with the Service Mesh ecosystem. The presenter will talk about ServiceComb’s exploration into hybrid deployment and governance of non-intrusive microservices and those based on a traditional architecture.</p>
+
+<p><img src="/assets/images/hc2018/4.jpeg" alt="4" /></p>
+
+<hr />
+
+<p><strong>《Practice Sharing: Hybrid Deployment of Service Mesh-based Microservices and Those Based on a Traditional Architecture》</strong></p>
+
+<p><a href="/assets/slides/20181012/EN/3_ServiceMesh-based_Microservices_and_Those_Based_on_a_Traditional_Architecture.pdf">PDF</a></p>
+
+<p><strong>Miao Yanjie:</strong>  Harmonizing non-intrusive microservices (Service Mesh being a shining example) with those based on traditional architectures to enable hybrid deployment and collaborated governance is no easy task. By drawing on practices from his own industry, the presenter will talk about how to use ServiceComb and Mesher to enable hybrid microservices deployment using different architectures, problems encountered, and some solutions to them.</p>
+
+<p><img src="/assets/images/hc2018/3.jpeg" alt="3" /></p>
+
+<hr />
+
+<p><strong>《Journey to Becoming an Apache Committer》</strong></p>
+
+<p><a href="/assets/slides/20181012/EN/5_My_Participation_in_ServiceComb.pdf">PDF</a></p>
+
+<p><strong>Feng Zheng:</strong> As a new PMC (Project Management Committee) member and committer to ServiceComb, the presenter will talk about his own experience participating in the ServiceComb project, lessons learned and achievements made.
+<img src="/assets/images/hc2018/5.jpeg" alt="5" /></p>
+
+<hr />
+
+<p><strong>《Hands-on Experience with Fast Microservices Programming》</strong></p>
+
+<p><a href="/assets/slides/20181012/EN/6_Experience_on_Fast_Microservice_Programming.pdf">PDF</a></p>
+
+<p><strong>Ju Zhen:</strong> The presenter will demonstrate how to use ServiceComb Java Chassis and Mesher of Service Mesh to quickly program microservices applications, and how to quickly deploy them by using Kubernetes. Audience can gain some hands-on experiences at the same time.</p>
+
+<p><img src="/assets/images/hc2018/6.jpeg" alt="6" /></p>
+
+<hr />
+<p><strong>Please checkout ServiceComb Gitter if you are interesting about Apache ServiceComb Project <a href="https://gitter.im/ServiceCombUsers/Lobby">ServiceComb Gitter</a></strong></p>
+
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+    <meta itemprop="datePublished" content="September 28, 2018">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb (incubating) Meetup -Shanghai 2018.10.12
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>Apache ServiceComb Meetup</strong></p>
+
+<p><strong>Meeting Date/time:</strong> Friday, October 12, 2018, 13:30-16:50 PM</p>
+
+<p><strong>Meeting Address:</strong>Shanghai World Expo Exhibition &amp; Convention Center, <strong>Room 416-417</strong></p>
+
+<p><strong>Live Online:</strong> <a href="http://www.itdks.com/eventlist/detail/2709">Link</a></p>
+
+<hr />
+
+<hr />
+<p><strong>《The Apache Way》</strong></p>
+
+<p><strong>Time:</strong>13:30-14:30</p>
+
+<p><strong>Summary:</strong> The Apache Software Foundation (ASF) is the world’s largest open source foundation with more than 300 open source projects, covering big data, cloud computing, servers and web frameworks, build management, content management, IoT, and more areas. Three experts from ASF will talk about the history and development of the ASF, its operation model, and will elaborate on the core ideas of the ASF – The Apache Way.This session will also cover the compliance rules and their meanings for Apache projects. And introduce the Apache Incubator project and its standard procedures. The presenter will talk about how open-source projects can develop into communities through the Apache Incubator project, and how these projects can eventually become top projects.</p>
+
+<p><strong>Speaker:</strong> Roman Shaposhnik is a renowned expert and consultant in corporate OpenSource and Digital Transformation. He serves on Apache Software Foundation board of directors. In the past, Roman played a key role in shaping the Open Source collaboration under the umbrella of Linux Foundation and held leadership roles at Pivotal focusing on big data and application management platforms. His work at Pivotal brought him to the nexus between container technologies, virtualization and unikernel architectures. He is an active member of Apache Software Foundation’s Incubator where he mentors and directly contributes to a wide range of Apache Software Foundation projects.</p>
+
+<p><strong>Speaker:</strong> Justin Mclean, chairman of the Apache IPMC, and an Apache member; more than 20 years of experience in IT software development, areas of expertise include IoT, web-based application development, database design, and open source hardware; has spoken at more than 50 conferences worldwide.</p>
+
+<p><strong>Speaker:</strong> Craig Russell, an Apache member and Apache IPMC member, specialized in database APIs, Java and JavaScript ORM architect for Sun and Oracle. Craig joined the Apache Software Foundation in 2005 and has been the Apache Secretary and ambassador since 2010.</p>
+
+<hr />
+<p><strong>《Latest Roadmap of the Apache ServiceComb(incubating) Community》</strong></p>
+
+<p><strong>Time:</strong> 14:40-15:00</p>
+
+<p><strong>Summary:</strong> This session will introduce the overall evolutionary roadmap of technology for the ServiceComb project and its latest development within the Apache Software Foundation.</p>
+
+<p><strong>Speaker:</strong> Jiang Ning, an Apache member, Huawei microservices expert, open source expert, former principle engineer of Red Hat, has 15 years of experience in developing enterprise-class open source middleware. He is engaged in Apache open-source middleware projects since 2006, including Apache CXF, Apache Camel, and Apache ServiceComb; and in-depth research on microservices architectures, Web Services, Enterprise Integration Patterns, SOA, and OSGi.</p>
+
+<hr />
+<p><strong>《ServiceComb’s Exploration of Service Mesh》</strong></p>
+
+<p><strong>Time:</strong> 15:00-15:20</p>
+
+<p><strong>Summary:</strong> This session will introduce the efforts made by ServiceComb to stay compatible with the Service Mesh ecosystem. The presenter will talk about ServiceComb’s exploration into hybrid deployment and governance of non-intrusive microservices and those based on a traditional architecture.</p>
+
+<p><strong>Speaker :</strong> Tian Xiaoliang is a HUAWEI CLOUD microservices architect and a leader of Service Mesh technology. He was the former monitoring platform architect for SVoice of Samsung, worked on O&amp;M and development solutions for SVoice. He has rich experience in PaaS, O&amp;M and development, and APM; has spoken at multiple open source conferences including LC3 and ArchSummit.</p>
+
+<hr />
+<p><strong>《Practice Sharing: Hybrid Deployment of Service Mesh-based Microservices and Those Based on a Traditional Architecture》</strong></p>
+
+<p><strong>Time:</strong> 15:20-15:40
+<strong>Summary:</strong> Harmonizing non-intrusive microservices (Service Mesh being a shining example) with those based on traditional architectures to enable hybrid deployment and collaborated governance is no easy task. By drawing on practices from his own industry, the presenter will talk about how to use ServiceComb and Mesher to enable hybrid microservices deployment using different architectures, problems encountered, and some solutions to them.</p>
+
+<p><strong>Speaker :</strong> Miao Yanjie is the chief architect in MedSci and has years of experience in cloud computing development for the healthcare industry.</p>
+
+<hr />
+<p><strong>《Journey to Becoming an Apache Committer》</strong></p>
+
+<p><strong>Time:</strong> 15:50-16:10</p>
+
+<p><strong>Summary:</strong> As a new PMC (Project Management Committee) member and committer to ServiceComb, the presenter will talk about his own experience participating in the ServiceComb project, lessons learned and achievements made.</p>
+
+<p><strong>Speaker:</strong> Feng Zheng, a software engineer, joined Red Hat Software in 2009. He is specialized in transaction manager; and is one of the core developers for Narayan and Blacktie projects. He worked on implementation of the distributed transaction part of Apache ServiceComb since 2017; optimized exception and timeout test scenarios by using tools like Byteman. He has in-depth research on distributed transaction processing and transaction processing in microservice environments.</p>
+
+<hr />
+<p><strong>《Hands-on Experience with Fast Microservices Programming》</strong></p>
+
+<p><strong>Time:</strong> 16:10-16:50</p>
+
+<p><strong>Summary:</strong> The presenter will demonstrate how to use ServiceComb Java Chassis and Mesher of Service Mesh to quickly program microservices applications, and how to quickly deploy them by using Kubernetes. Audience can gain some hands-on experiences at the same time.</p>
+
+<p><strong>Speaker:</strong> Ju Zhen, a Huawei software engineer and Go language developer, is specialized in cloud computing, container technology, and DevOps. He is one of the core developers of container image services for HUAWEI CLOUD, and is mainly engaged in Huawei open source project development. He is a co-translator of The Docker Book and is an advocate of technologies like O&amp;M automation, microservices, and Service Mesh. He gave speeches at Container Days 2017 and KubeCon 2017.</p>
+
+<hr />
+<p><strong>Please checkout ServiceComb Gitter if you are interesting about visiting the booth of ServiceComb during the Meetup</strong>
+<strong><a href="https://gitter.im/ServiceCombUsers/Lobby">ServiceComb Gitter</a></strong></p>
+
+        
+      </section>
+
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+        
+        
+  
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+  
+
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+    <span itemprop="keywords">
+    
+      
+      
+      <a href="/tags/#meetup" class="page__taxonomy-item" rel="tag">Meetup</a><span class="sep">, </span>
+    
+      
+      
+      <a href="/tags/#microservice" class="page__taxonomy-item" rel="tag">microservice</a>
+    
+    </span>
+  </p>
+
+
+
+
+
+        
+          
+            
+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> Updated:</strong> <time datetime="2018-09-30">September 30, 2018</time></p>
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new file mode 100644
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+    <meta itemprop="datePublished" content="July 02, 2019">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>On June 24, 2019, Beijing time, at the Shanghai World Expo Center in China, the Apache ServiceComb community held microservice Co-Located event at the KubeCon+CloudNativeCon+Open Source Summit conference which the most prestigious in the open source industry.</p>
+
+<p>The event invited Apache Member, Apache Committer, Huawei Cloud ServiceStage Chief Engineer, Jingdong DBA Expert, Global Top10 IT Service Provider Development Manager and other senior practitioners to share experience,the topic of the speech includes Apache community development experience, enterprise PaaS responds to complex network topology cases, car brand digital marketing system microservice practices, high-performance service communication optimization techniques and so on. ServiceComb community has also released a series of  innovative new projects to assist user solve pain points of microservice</p>
+
+<p>In the process of enterprise transformation to digitalization and cloudization, microservice is the best choice. However, it is not a silver bullet. Enterprises will encounter many challenges in the process of microservice. ServiceComb will continue to closely focus on users and developers,solve the problem of microservice pain points.</p>
+
+<p>Adhering to the concept of “provide a one-stop open source micro-service solution to assist enterprises, users and developers migrate applications on the cloud, archieving efficient O&amp;M and management of microservice applications”,ServiceComb community initiates a convening order to mobilize aspiring people to join the community and do something interesting together.</p>
+
+<p><img src="/assets/images/Community_Summoned_en.png" alt="1" /></p>
+
+<hr />
+<p><strong>Video review:</strong> <a href="https://huaweicloud.bugu.mudu.tv/watch/ym1vkamp">Link</a></p>
+
+<hr />
+<p><strong>《ServiceComb opensource way》</strong>  <a href="/assets/slides/20190624/1_ServiceComb_Opensource_Way.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Willem Jiang</strong>, Apache Member, Apache ServiceComb VP</p>
+
+<p><strong>Summary：</strong> This speech summarizes the experience and gains of ServiceComb open source in the past two years. Hope that to assist guys understand open source, participate in open source, and create a better future.</p>
+
+<hr />
+<p><strong>《Digital marketing system microservice practice of car brands》</strong>  <a href="/assets/slides/20190624/2_NTTDATA_Microservice_Practices.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Xiaowei Zhu</strong>, NTTDATA Shanghai Branch, Digital Marketing Development Manager</p>
+
+<p><strong>Summary：</strong> This speech shares the transformation of NTTDATA into microservice, and creates a digital marketing platform for car brands, assist enterprises to flexibly respond to market demands and supporting the practice of fast changing business scenarios of digital marketing.</p>
+
+<hr />
+<p><strong>《Microservice practice in enterprise PaaS》</strong>  <a href="/assets/slides/20190624/3_Enterprise_PaaS_Microservice_Pratices.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Shawn Tian</strong>, Huawei Cloud ServiceStage Chief Engineer</p>
+
+<p><strong>Summary：</strong> This speech shares Huawei Cloud PaaS platform using ServiceComb to solve complex network topology problems of distributed systems, assist users complete microservice transformation.</p>
+
+<hr />
+<p><strong>《ServiceComb innovation new projects release》</strong>  <a href="/assets/slides/20190624/4_Innovation_New_Project_Release.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Mabin</strong>, Apache ServiceComb member, Huawei Open Source Software Architect</p>
+
+<p><strong>Summary：</strong> This speech shares the pain points of users in the process of implementing microservices transformation, as well as ServiceComb’s innovative projects, we look forward to working with more users and developers to think about how to solve the problems in microservices together.</p>
+
+<hr />
+<p><strong>《ShardingSphere combines ServiceComb distributed transaction solution》</strong>  <a href="/assets/slides/20190624/5_ShardingSphere_Distributed_Transaction_Solution.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Juan Pan</strong>, Apache ShardingSphere member, Jingdong DBA Expert</p>
+
+<p><strong>Summary：</strong> This speech revolves around distributed transactions, explains that ShardingSphere(the first ASF distributed database middleware project) to join forces with ServiceComb(the first ASF microservice top-level project) to implement distributed transactions solution in microservice and distributed database scenarios.</p>
+
+<hr />
+<p><strong>《High-performance service communication practice》</strong>  <a href="/assets/slides/20190624/6_Microservice_High_Performance_Communication.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Bruce Liu</strong>, Apache Commiter</p>
+
+<p><strong>Summary：</strong> This speech combines the communication optimization practices of servicecomb-java-chassis to illustrate some common methods of performance optimization, and from a practical perspective, sharing performance optimization in terms of system reliability, resource planning, and other aspects that are not easily perceived by developers directly. .</p>
+
+<hr />
+<p><strong>《Huawei Cloud distributed transaction solution》</strong>  <a href="/assets/slides/20190624/7_HuaweiCloud_Distributed_Transaction_DTM_Practices.pdf">PDF Download</a></p>
+
+<p><strong>Speaker：</strong> <strong>Jon Wang</strong>, Huawei Cloud Architect</p>
+
+<p><strong>Summary：</strong> This topic explains how to implement distributed transactions when you build microservices based on Huawei Cloud through related scenarios. How to fail back? How to deal with timeouts? Explain in detail the principles behind it.</p>
+
+<hr />
+<p><strong>more questions, welcome to scan the QR code or WeChat to add “ServiceComb Assistant</strong>
+<img src="/assets/images/QRcode.png" alt="1" /></p>
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+    <meta itemprop="datePublished" content="September 20, 2019">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>On September 20, 2019, at the Shanghai World Expo Center in China, the Apache ServiceComb community held microservice Co-Located event at the HUAWEI CONNECT 2019, that concluded successfully.</p>
+
+<p>The event invited the chairman of the Apache Foundation, the chairman of the Apache Incubator Project Management Committee, Apache Member, Apache Committer, and Huawei Cloud PaaS team architect. They shared the “Apache Explained”, “The Apache Incubator”, “ServiceComb Incubating Journey”, “Apache ServiceComb-Innovative Microservices”, “HUAWEI CLOUD Microservice Tool Improves Development Efficiency”, etc. Many micro-service technologies and experience. ServiceComb community has also released a series of innovative new projects to assist user solve pain points of microservice.</p>
+
+<p><strong>Session 1: The Apache Way</strong></p>
+
+<p>The Apache Software Foundation is the world’s largest open source foundation and currently has more than 300 open source projects covering big data, cloud computing, server and web frameworks, build management, content management, and the Internet of Things. Foundation members introduced the Apache Software Foundation, open source community governance principles, and the operating mechanism of the Apache incubator, and shared the Apache project’s successful incubation experience with Huawei-funded project Apache ServiceComb.</p>
+
+<p><a href="/assets/slides/20190920/EN/The_Apache_Way_En.pdf">PDF Download</a></p>
+
+<p><img src="/assets/images/hc2019/apache.jpg" alt="1" /></p>
+
+<p><strong>Apache Explained</strong></p>
+
+<p><strong>Craig Russell, Chairman of the ASF, Apache Software Foundation:</strong> A detailed introduction to the history and current state of the Apache Foundation and its core principles.</p>
+
+<p><img src="/assets/images/hc2019/introduction.jpg" alt="1" /></p>
+
+<p><strong>The Apache Incubator</strong></p>
+
+<p><strong>Justin Mclean, Chairman of the Apache IPMC, Apache Software Foundation:</strong>  Explains the operating mechanism of the Apache incubator and the features of the Apache protocol, and the release process for the Apache project.</p>
+
+<p><img src="/assets/images/hc2019/process.jpg" alt="1" /></p>
+
+<p><strong>ServiceComb Incubating Journey</strong></p>
+
+<p><strong>Willem Jiang, Huawei Open Source Expert, ASF Member:</strong> Shared the practical experience of Huawei’s donated Apache ServiceComb successful incubation, and gave its own summary and suggestions on how to better develop the open source community.</p>
+
+<p><img src="/assets/images/hc2019/incubation.jpg" alt="1" /></p>
+
+<hr />
+<p><strong>Session 2: Innovative Microservices for More Efficient Development</strong></p>
+
+<p>The Apache ServiceComb community has listened carefully to the pain points encountered by users implementing the microservices architecture. The first half of this topic will share these pain points and incubate projects to solve some pain points. I hope to discuss with users how to solve the problems in micro-service practice. The second half of this topic will introduce the micro-service tool innovation practices that work hand-in-hand with users.</p>
+
+<p><img src="/assets/images/hc2019/servicecomb.jpg" alt="1" /></p>
+
+<p><strong>Apache ServiceComb-Innovative Microservices</strong></p>
+
+<p><a href="/assets/slides/20190920/EN/Apache_ServiceComb-Innovative_Microservices.pdf">PDF Download</a></p>
+
+<p><strong>Ma Bin, Huawei Open Source Architect, Apache Committer:</strong> Interpret the innovative project architecture, roadmap and scenario cases launched by the ServiceComb community for user pain points, including: multi-language operating environment, micro-service contract tools, heterogeneous communication in service centers, distributed configuration centers, micro-service authentication; The convening order calls for more interested fans to contribute to the open source community.</p>
+
+<p><img src="/assets/images/hc2019/innovative.jpg" alt="2" /></p>
+
+<hr />
+
+<p><strong>HUAWEI CLOUD Microservice Tool Improves Development Efficiency</strong></p>
+
+<p><a href="/assets/slides/20190920/EN/HUAWEI_CLOUD_Microservice_Tool_Improves_Development_Efficiency.pdf">PDF Download</a></p>
+
+<p><strong>Wang Qijun, Huawei Cloud PaaS Architect:</strong> Based on the practice of ServiceComb, Huawei Cloud Micro Service shared the micro-service splitting tools and contract management tools, which are the two developers/users with the highest attention.</p>
+
+<p><img src="/assets/images/hc2019/efficiency.jpg" alt="4" /></p>
+
+<hr />
+
+<p><strong>About the Apache ServiceComb</strong>：</p>
+
+<p>Apache ServiceComb, the main code of the Apache Software Foundation Incubation Project, donated by Huawei Cloud, is dedicated to helping enterprises easily build cloud native applications and traditional enterprise business rapid micro-services, helping users quickly develop micro-services through a series of solutions to achieve these Efficient operation and maintenance management of microservice applications. It has a complete micro-service ecological stack, no vendor lock-in, currently incubating with Apache Way, and has a number of non-Huawei commercial users outside of Huawei’s business such as consumer cloud, cloud EI, cloud security, cloud core, and community. And developers are also increasingly diverse.</p>
+
+<hr />
+<p><strong>more questions, welcome to scan the QR code or WeChat to add “ServiceComb Assistant</strong>
+<img src="/assets/images/QRcode.png" alt="1" /></p>
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+  less than 1 minute read
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+      <section class="page__content" itemprop="text">
+        <p><strong>Apache ServiceComb (incubating) Day Report</strong></p>
+
+<p>​  <br />
+​<strong>Event Date/Time</strong>: Wednesday, June 27, 2018, 11:00 – 17:30</p>
+
+<p><strong>Event Location</strong>: Room 211, China National Convention Center, Beijing, China</p>
+
+<p>The microservice open source project - Apache ServiceComb (incubating) host a Open Day Meetup at the China National Convention Center (Beijing, China) from 11.00am to 17.30pm on Wednesday, June 27th. According the workshop, 6 speaker presents 7 topics about Interpretation of the Apache community, Business Microservices Commercial Case Sharing, Overview of ServiceComb Community and Technology Sharing, Domain-Driven Design (DDD) in Microservices etc. 
+About 80 participants attended the workshop on-site and about 300 participants watched the workshop online. Besides, during the LC3 conference, the servicecomb community release a letter of “ServiceComb Anniversary” which gained thousands of clicks.</p>
+
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+    <meta itemprop="description" content="Real time updated information of Apache ServiceComb (incubating) Day">
+    <meta itemprop="datePublished" content="June 14, 2018">
+    <meta itemprop="dateModified" content="June 14, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Microservice Meetup: Detailed Agenda of Apache ServiceComb (incubating) Day
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>Apache ServiceComb (incubating) Day</strong></p>
+
+<p>​  <br />
+​  <br />
+The microservice open source project - Apache ServiceComb (incubating) will host a Open Day Meetup at the China National Convention Center (Beijing, China) from 11.00am to 17.30pm on Wednesday, June 27th.</p>
+
+<p>The Open Day will focus on the following aspects and discuss the technology and direction of microservices with enterprises, users and developers.</p>
+
+<p>​</p>
+
+<p>- Interpretation of the Apache community</p>
+
+<p>- Business Microservices Commercial Case Sharing</p>
+
+<p>- Overview of ServiceComb Community and Technology Sharing</p>
+
+<p>- Domain-Driven Design (DDD) in Microservices</p>
+
+<p>​  <br />
+​</p>
+
+<p><strong>Event Date/Time</strong>: Wednesday, June 27, 2018, 11:00 – 17:30</p>
+
+<p><strong>Event Location</strong>: Room 211, China National Convention Center, Beijing, China</p>
+
+<p><strong>Event Cost</strong>: Complimentary, go up to the Room 211 using the elevators to level 2.</p>
+
+<p>​  <br />
+​</p>
+
+<p><strong><em>About Apache ServiceComb (incubating) project:</em></strong></p>
+
+<p>​         <em>The main code of the Apache ServiceComb (incubating) Project was donated by Huawei Cloud. The project is dedicated to help enterprises easily build cloud native applications and help build microservices from traditional enterprise business. By providing a series of solutions, Apache ServiceComb (incubating) helps users to develop microservices quickly and operate maintenance efficiently of these microservices applications, with a full microservices technology stack, without vendor lock-in. Currently, ServiceComb is following the “Apache Way”. It is used in HUAWEI businesses such as Consumer Cloud, Cloud EI, Cloud Security, Cloud Core Network, also popular in non-HUAWEI users, such as iSoftStone, pactera, hulingwulian Technology, ceewa, medsci, Hang Ling Technology, Gaomaizhiyuan Technology, etc. The developers are also increasingly diversified.</em></p>
+
+<p>This is a free Open Meetup organized by the Apache ServiceComb (incubating) community and sponsored by Huawei Cloud. We have invited several experts and engineers from commercial enterprises, Apache Foundation, ServiceComb community and HUAWEI to share their experiences. Detailed agenda as follows:</p>
+
+<p>​</p>
+
+<p><strong>How Apache Works</strong></p>
+
+<p><strong>Time:</strong> 1100-1200</p>
+
+<p><strong>Speaker</strong>: Jean-Baptiste Onofré; Apache Member, fellow of Talend, who started work on the Apache Software Foundation in 2004, and PMC member of 20+ Apache projects such as Karaf, Camel, and Carbondata.</p>
+
+<p><strong>Abstract:</strong></p>
+
+<p>In-depth interpretation of the world’s largest open source software foundation – Apache Software Foundation. Introduce what is the “Apache Way” and its attraction, the whole process from open source to incubation and then graduated combined with actual project. Besides, it will introduce the current incubating status of ServiceComb.</p>
+
+<p><strong>ServiceComb Roadmap</strong></p>
+
+<p><strong>Time:</strong> 1330-1345</p>
+
+<p><strong>Speaker:</strong> Jiang Ning, Apache Member, Huawei Opensource Expert.</p>
+
+<p><strong>Abstract</strong>:</p>
+
+<p>Introduce Vision, current status, technology Roadmap and community activities of Apache ServiceComb (incubating) community.</p>
+
+<p>​</p>
+
+<p><strong>How Smart City Microserviced Based on ServiceComb from iSoftStone</strong></p>
+
+<p><strong>Time:</strong> 1345-1415</p>
+
+<p><strong>Speaker</strong>: Bao Yongwei; VP of iSoftStone Smart City Business, focusing on implementation and innovations in smart city related to cloud computing and big data.</p>
+
+<p><strong>Abstract</strong>:</p>
+
+<p>iSoftStone Smart City Business involves a large number of systems with complex interactions. During the process of microservices implementation, it faced inappropriate microservices granularity, high code duplication rate, and difficulty in deployment of large application microservices. This speech will introduce how iSoftStone use ServiceComb, especially ServiceComb’s Swagger API, to resolve the pain points of microservices process, enable interoperability and decoupled chimney  systems to meet the challenges of microservices diversity in smart city.</p>
+
+<p>​</p>
+
+<p><strong>Detailed Introduction of Java SDK and Service  Center</strong></p>
+
+<p><strong>Time:</strong> 1415-1445</p>
+
+<p><strong>Speaker:</strong> Wu Jiminm,  Apache ServiceComb (incubating) PPMC, Original Author of Huawei Cloud Service Engine</p>
+
+<p><strong>Abstract:</strong> </p>
+
+<p>Introduce technical details of Java SDK and Service  Center from ServiceComb.</p>
+
+<p>​</p>
+
+<p>​</p>
+
+<p><strong>Millions Users Solution Based on ServiceComb Microservices from Huawei Consumer Cloud</strong></p>
+
+<p><strong>Time:</strong> 1445-1515</p>
+
+<p><strong>Speaker</strong>: Li Linfeng, microservices architect for Huawei’s Consumer Cloud application market, who has years of experience in designing and developing platform middleware, cloud platforms, and microservices. Author of “Netty authoritative guide” and “The principle and practice of distributed service framework”.</p>
+
+<p><strong>Abstract</strong>:</p>
+
+<p>Huawei Consumer Cloud services provide high-quality cloud services for hundreds of millions of Huawei end users in more than 100 countries. In order to support the rapid development of the business, it is necessary to drive delivery of value requirements efficiently and agilely through the microservices architecture. By using SpringMVC and transparent RPC development model from ServiceComb, the existing business code can be migrated to the new microservices architecture at a low cost. Besides, the business implements full-stack asynchronous transformation using the Reactive asynchronous programming model from ServiceComb. Compared with the traditional synchronous blocking service call, the performance is improved several times, but the resource loss is greatly reduced. More practical cases will be shown on this topic.</p>
+
+<p>​</p>
+
+<p><strong>Domain Driven Design (DDD) in Microservices</strong></p>
+
+<p><strong>Time:</strong> 1525-1555</p>
+
+<p><strong>Speaker</strong>: Wang Lei, pioneer of microservices in China, author of “Microservices Architecture and Practice”, Huawei Microservices Expert, and former ThoughtWorks Chief Consultant.</p>
+
+<p><strong>Abstract</strong>:</p>
+
+<p>As a new architecture style, microservice has been widely adopted by the industry. It has become a fulfillment tool for the concept of DDD-driven design. This topic shares how to practice microservice with Domain Driven Design philosophy friendly.</p>
+
+<p>​</p>
+
+<p><strong>Detailed Introduction of Transaction Consistency Solution from ServiceComb-Saga</strong></p>
+
+<p><strong>Time</strong>: 1555-1625</p>
+
+<p><strong>Speaker:</strong>  Jiang Ning Apache Member, Huawei Opensource Expert.</p>
+
+<p><strong>Abstract</strong>:</p>
+
+<p>Share ServiceComb’s distributed transaction Saga solution and best practices.</p>
+
+<p>​</p>
+
+<p><strong>Thinking about ServiceMesh in ServiceComb</strong></p>
+
+<p><strong>Time:</strong> 1625-1730</p>
+
+<p><strong>Speaker</strong>: Tian Xiaoliang, Architect in Service Mesh from Huawei Cloud.</p>
+
+<p><strong>Abstract</strong>:</p>
+
+<p>Share ServiceComb’s latest thinking on Service Mesh, and ServiceMesh’s practice in Huawei Cloud.</p>
+
+<p>​</p>
+
+<p>​   <br />
+<strong>If you want to freely visit the LC3 booth except attending the meet up , please go to our Gitter to inquire:</strong> <br />
+<a href="https://gitter.im/ServiceCombUsers/Lobby">ServiceComb Gitter Room</a></p>
+
+        
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+    <meta itemprop="headline" content="On-demand Resource Control for Micro-serviced Company by Autoscale">
+    <meta itemprop="description" content="This article introduces practice of using kubernetes autoscale in the micro-serviced Company demo to achieve on-demand resource control">
+    <meta itemprop="datePublished" content="August 24, 2017">
+    
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+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">On-demand Resource Control for Micro-serviced Company by Autoscale
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>　　<a href="/docs/company-on-kubernetes/">Last article</a> describes how to quickly deploy the Company  demo on K8S. This article will continue to demonstrate the benefits of micro-service architecture, use auto-scale of K8S  in Company to achieve on-demand fine-grained resources.</p>
+
+<h2 id="prepare">Prepare</h2>
+
+<h3 id="prepare-k8s-environment">Prepare K8S Environment</h3>
+
+<p>Install monitor Heapster and Grafana in K8S to enable auto-scale ability in K8S:</p>
+
+<p>Get one-click installing scripts in the <a href="https://github.com/zenlinTechnofreak/LinuxCon-Beijing-WorkShop/tree/autoscal/kubernetes/heapster/deploy">author’s repo</a>，update value of api-server as following and run kube.sh to start,</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>vi LinuxCon-Beijing-WorkShop/kubernetes/heapster/deploy/kube-config/influxdb/heapster.yaml
+</code></pre></div></div>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spec</span><span class="pi">:</span>
+  <span class="na">replicas</span><span class="pi">:</span> <span class="m">1</span>
+  <span class="na">template</span><span class="pi">:</span>
+    <span class="na">metadata</span><span class="pi">:</span>
+      <span class="na">labels</span><span class="pi">:</span>
+        <span class="na">task</span><span class="pi">:</span> <span class="s">monitoring</span>
+        <span class="na">k8s-app</span><span class="pi">:</span> <span class="s">heapster</span>
+    <span class="na">spec</span><span class="pi">:</span>
+      <span class="na">serviceAccountName</span><span class="pi">:</span> <span class="s">heapster</span>
+      <span class="na">containers</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">heapster</span>
+        <span class="na">image</span><span class="pi">:</span> <span class="s">gcr.io/google_containers/heapster-amd64:v1.4.1</span>
+        <span class="na">imagePullPolicy</span><span class="pi">:</span> <span class="s">IfNotPresent</span>
+        <span class="na">command</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="s">/heapster</span>
+<span class="c1">#use 'kubernetes' directly if installed inside the cluster</span>
+        <span class="pi">-</span> <span class="s">--source=kubernetes</span>
+<span class="c1">#use the practical api-server address if installed outside the cluster</span>
+<span class="c1">#        - --source=kubernetes:http://10.229.43.65:6443?inClusterConfig=false</span>
+         <span class="pi">-</span> <span class="s">--sink=influxdb:http://monitoring-influxdb:8086</span>
+</code></pre></div></div>
+
+<h3 id="start-company-demo">Start Company Demo</h3>
+
+<p>Download Company source code, restricted resources, creating auto-scaller,</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git
+
+<span class="nb">cd </span>LinuxCon-Beijing-WorkShop/kubernetes/
+
+bash start-autoscale.sh 
+</code></pre></div></div>
+
+<p>In Company’s deployment script, filed of resources is added to limit  200 milli-cores to each pod(1000 milli-cores equal to 1 core),</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="na">resources</span><span class="pi">:</span>
+      <span class="na">limits</span><span class="pi">:</span>
+        <span class="na">cpu</span><span class="pi">:</span> <span class="s">200m</span>
+</code></pre></div></div>
+<p>In script start-autoscale.sh, each command create a Horizontal Pod Autoscaler that maintains between 1 and 10 replicas of the Pods controlled by its deployment created. HPA will increase and decrease the number of replicas (via the deployment) to maintain an average CPU utilization across all Pods of 50%(this means average CPU usage of 100 milli-cores),</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># Create Horizontal Pod Autoscaler</span>
+kubectl autoscale deployment zipkin <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-bulletin-board <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-worker <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-doorman <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-manager <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+kubectl autoscale deployment company-beekeeper <span class="nt">--cpu-percent</span><span class="o">=</span>50 <span class="nt">--min</span><span class="o">=</span>1 <span class="nt">--max</span><span class="o">=</span>10
+</code></pre></div></div>
+
+<p>HPA can be created after running start-autoscale.sh, get HPA status by the following command,</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code> kubectl get hpa
+</code></pre></div></div>
+
+<h3 id="start-pressure-testing">Start Pressure Testing</h3>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">export</span> <span class="nv">$HOST</span><span class="o">=</span>&lt;heapster-ip&gt;:&lt;heapster-port&gt;
+bash LinuxCon-Beijing-WorkShop/kubernetes/stress-test.sh
+</code></pre></div></div>
+
+<p>The script enable a dead loop, request to Company to calculate fibonacci number 200 times in each second, causing pressure on Company,</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">FIBONA_NUM</span><span class="o">=</span><span class="sb">`</span>curl <span class="nt">-s</span> <span class="nt">-H</span> <span class="s2">"Authorization: </span><span class="nv">$Authorization</span><span class="s2">"</span> <span class="nt">-XGET</span> <span class="s2">"http://</span><span class="nv">$HOST</span><span class="s2">/worker/fibonacci/term?n=6"</span><span class="sb">`</span>
+</code></pre></div></div>
+
+<h2 id="testing-result">Testing Result</h2>
+
+<p>Following datas gets from  HPA and Grafana,</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-1.png" alt="Fig 1" class="align-center" /> 
+Fig 1    HPA Data of Start-up Period</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-2.png" alt="Fig 2" class="align-center" />
+Fig 2    Granfana Data of Start-up Period</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-3.png" alt="Fig 3" class="align-center" />
+Fig 3    HPA  Data of middle Period</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-4.png" alt="Fig 4" class="align-center" />
+Fig 4    Granfana Data of The End</p>
+
+<p class="figure-caption"><img src="/assets/images/company-autoscale-5.png" alt="Fig 5" class="align-center" />
+Fig 5    HPA Data of The End</p>
+
+<p><strong>Analyze the data to get the results,</strong></p>
+
+<ol>
+  <li>
+    <p>Pressure is focused on the pod of company-manager, auto-scaler of K8S increase the pods to achieve goal,  less than 50% of CPU usage limited(In fig 5, Usage default company-manager/Request default company-manager = 192/600 about equal to 33% in fig 4), keeping steady.</p>
+  </li>
+  <li>
+    <p>Before steady, auto-scaling may cause losing packages.</p>
+  </li>
+  <li>
+    <p>Company startup will cause temporarily increasing of the system resource load, so the CPU occupancy curve is showed like a crest-like, but HPA can accurately find the number of matching count of pods. In fig 3, count of pods has exceeded 3 which is actually required, and changed to 3 to keep the system steady.</p>
+  </li>
+  <li>
+    <p>The data of HPA and Granfana should be reported with some delay,  official statement:</p>
+
+    <p>Starting and stopping pods may introduce noise to the metric (for instance, starting may temporarily increase CPU). So, after each action, the autoscaler should wait some time for reliable data. Scale-up can only happen if there was no rescaling within the last 3 minutes. Scale-down will wait for 5 minutes from the last rescaling. Moreover any scaling will only be made if:<code class="highlighter-rouge">avg(CurrentPodsConsumption) / Target</code> drops below 0.9 or increases above 1.1 (10% tolerance).</p>
+  </li>
+</ol>
+
+<p>It is all of the demonstrate  above, anyway, Martin Fowler wrote in the <a href="https://martinfowler.com/articles/microservices.html">March 2014 article</a>:</p>
+<blockquote>
+  <p><em>“Microservices” - yet another new term on the crowded streets of software architecture. Although our natural inclination is to pass such things by with a contemptuous glance, this bit of terminology describes a style of software systems that we are finding more and more appealing. We’ve seen many projects use this style in the last few years, and results so far have been positive, so much so that for many of our colleagues this is becoming the default style for building enterprise applications. Sadly, however, there’s not much information that outlines what the microservice style is and how to do it.</em></p>
+</blockquote>
+
+<p>Mr. Wang Lei, the forerunner of domestic practice micro-service, also held a comprehensive discussion in the book “Micro Service Architecture and Practice”.</p>
+
+<p>Company based on ServiceComb, with micro-service properties, so we can doing  fine-grained control to the single-load service Company-manager, to achieve the purpose of on-demand, this will greatly helpful to accurately and effectively solve the application bottlenecks, improve the efficiency of resource use.</p>
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+            <h1 class="page__title" itemprop="headline">Apache ServiceComb community joint chuanzhiboke sub-brand Itheima, Boxuegu and Wisdom Gathering release micro-service tutorial
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+      <section class="page__content" itemprop="text">
+        <p>On December 23, 2018, the Apache ServiceComb community jointly Chuanzhiboke  sub-brand Itheima, Boxuegu and Wisdom Gathering, and jointly launched the Apache ServiceComb technical course joint construction and technical resource sharing release ceremony successfully held at Beijing Global Financial Center.</p>
+
+<p>Apache ServiceComb is the core of Huawei Cloud microservices engine CSE. Apache, the world’s largest software foundation. announced on October 24, 2018 that Apache ServieComb graduated and became the world’s first Apache microservice top level project. At the 8th Cloud Computing Standards and Applications Conference held in Beijing, Apache ServiceComb won the first prize of China Excellent Open Source Project organized by China Open Source Cloud Alliance (COSCL) due to its technological development potential, activity level and degree of attention. “. ServiceComb is committed to helping enterprises, users and developers to easily micro-service enterprise applications to the cloud and achieve efficient operation and management of micro-service applications.</p>
+
+<p>The launching ceremony was jointly released by Huawei Open Source Software  Competence Center technical expert Jiang Ning, Huawei Open Source Software Competence Center enterprise application micro-service engineer Ma Bin, Wisdom Gathering’s operation director Wang Ping, and Boxuegu’s operation director Tang Yangguang. Jiang Ning, a technical expert at Huawei Open Source Software  Competence Center, said that he is very grateful to Chuanzhiboke for providing such a rare resource exchange opportunity for IT people to exchange technology and resources. I hope that IT people will get better growth and development on Apache ServiceComb community and platform.</p>
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+	    
+        Gopher, PaaS and Microservice
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+    <meta itemprop="headline" content="Communication Between Service-Center and MicroServices">
+    <meta itemprop="description" content="An introduction of how service-center and microservices work together">
+    <meta itemprop="datePublished" content="August 09, 2017">
+    <meta itemprop="dateModified" content="August 09, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Communication Between Service-Center and MicroServices
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Service-Center(<a href="https://github.com/apache/incubator-servicecomb-service-center">SC</a>) is a service registry that allows services to register their instance information and to discover providers of a given service.
+SC uses etcd to store all the information of micro-service and its instances. Below is the diagram stating the working principles and flow of SC.</p>
+
+<h4 id="on-startup">On StartUp</h4>
+<p>Here we assume that micro-services are written using <a href="https://github.com/apache/incubator-servicecomb-java-chassis">java-chassis</a> sdk. So when micro-service boots up then java-chassis sdk does the following list of tasks.</p>
+
+<ol>
+  <li>
+    <p>On startup provider registers the micro-service to SC if not registered earlier and also register its instance information like its Ip and Port on which instance is running.</p>
+  </li>
+  <li>
+    <p>SC stores the provider information in etcd.</p>
+  </li>
+  <li>
+    <p>On startup consumer retrieves the list of all provider instance from SC using the micro-service name of the provider.</p>
+  </li>
+  <li>
+    <p>Consumer sdk stores all the information of provider instances in its cache.</p>
+  </li>
+  <li>
+    <p>Consumer sdk creates a web socket connection to SC to watch all the provider instance information, if there is any change in the provider then sdk updates it’s cache information.</p>
+  </li>
+</ol>
+
+<p><img src="/assets/images/onStartup.PNG" alt="OnStartup" class="align-center" /></p>
+
+<h4 id="communication-between-consumer---provider">Communication between Consumer -&gt; Provider</h4>
+<p>Once the bootup is successful then the consumer can communicate with providers flawlessly, below is the diagram illustrating the communication between provider and consumer.</p>
+
+<p><img src="/assets/images/communication.PNG" alt="Communication" class="align-center" /></p>
+
+<p>Provider instance regularly sends heartbeat signal every 30 seconds to SC, if SC does not recieve the heartbeat for particular instance then the information in etcd expires and the provider instance information is removed.<br />
+Consumer watches the information of provider instances from SC and if there is any change then the cache is updated.<br />
+When Consumer needs to communicate to Provider then consumer reads endpoints of the provider instances from cache and do loadbalancing to communicate to Provider.</p>
+
+        
+      </section>
+
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content/docs/company-on-kubernetes/index.html

diff --git a/content/docs/company-on-kubernetes/index.html b/content/docs/company-on-kubernetes/index.html
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+    <meta itemprop="headline" content="One-click Deployment at Kubernetes">
+    <meta itemprop="description" content="This blog will introduce how to deploy company based on ServiceComb in the kubernetes cluster, and intercom communication of company">
+    <meta itemprop="datePublished" content="August 21, 2017">
+    
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">One-click Deployment at Kubernetes
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Blog <a href="/docs/linuxcon-workshop-demo/">Linux Con Workshop Demo</a> describes how to use the ServiceComb rapid development company example, the typical enterprise application company example for fast micro-serviced.</p>
+
+<p>Now, <a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git">github</a> already provides a one-click deployment on the kubernetes cluster. This article is going to focus on the corresponding yaml file and service communication, which will be useful for developers develop and deploy micro-serviced application to the cloud based on the Company model.</p>
+
+<h2 id="one-click-deployment">One-click Deployment</h2>
+
+<p><a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop/blob/master/kubernetes/README.md">Run Company on Kubernetes Cluster</a> Provides a detailed user guide, company can be deployed in the kubernetes cluster easily thourgh the following three instructions,</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop.git
+
+<span class="nb">cd </span>ServiceComb-Company-WorkShop/kubernetes/
+
+bash start.sh
+</code></pre></div></div>
+
+<h2 id="yaml-file-interpretation">Yaml File Interpretation</h2>
+
+<p>Take the author’s actual environment as an example:</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>root@zenlin:~/src/LinuxCon-Beijing-WorkShop/kubernetes# kubectl get pod <span class="nt">-owide</span>
+NAME                                      READY     STATUS    RESTARTS   AGE       IP            NODE
+company-beekeeper-3737555734-48sxf        1/1       Running   0          17s       10.244.2.49   zenlinnode2
+company-bulletin-board-4113647782-th91w   1/1       Running   0          17s       10.244.1.53   zenlinnode1
+company-doorman-3391375245-g0p8c          1/1       Running   0          17s       10.244.1.55   zenlinnode1
+company-manager-454733969-0c1g8           1/1       Running   0          16s       10.244.2.50   zenlinnode2
+company-worker-1085546725-x7zl4           1/1       Running   0          17s       10.244.1.54   zenlinnode1
+zipkin-508217170-0khr3                    1/1       Running   0          17s       10.244.2.48   zenlinnode2
+</code></pre></div></div>
+<p>Total of six pods, company manager, company-doorman, company-bulletin-board, company-worker, company-beekeeper, and zipkin, K8S cluster assigns the corresponding cluster IP to them.</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>root@zenlin:~/src/LinuxCon-Beijing-WorkShop/kubernetes# kubectl get svc <span class="nt">-owide</span>
+NAME                     CLUSTER-IP      EXTERNAL-IP   PORT<span class="o">(</span>S<span class="o">)</span>          AGE       SELECTOR
+company-bulletin-board   10.99.70.46     &lt;none&gt;        30100/TCP        12m       io.kompose.service<span class="o">=</span>company-bulletin-board
+company-manager          10.100.61.227   &lt;nodes&gt;       8083:30301/TCP   12m       io.kompose.service<span class="o">=</span>company-manager
+zipkin                   10.104.92.198   &lt;none&gt;        9411/TCP         12m       io.kompose.service<span class="o">=</span>zipkin
+</code></pre></div></div>
+
+<p>Only three services are started, zipkin, bulletin-board, and  company-manager, that is because the address of call chain and the bulletin-board need to be passed in the cluster to be called by other services, and the manager is the api gateway nedd to be visited outside the cluster.</p>
+
+<p>Read company-bulletin-board-service.yaml,</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="na">apiVersion</span><span class="pi">:</span> <span class="s">v1</span>
+    <span class="na">kind</span><span class="pi">:</span> <span class="s">Service</span>
+    <span class="na">metadata</span><span class="pi">:</span>
+      <span class="na">creationTimestamp</span><span class="pi">:</span> <span class="no">null</span>
+      <span class="na">labels</span><span class="pi">:</span>
+<span class="err">    	</span><span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-bulletin-board</span>
+      <span class="s">name</span><span class="pi">:</span> <span class="s">company-bulletin-board</span>
+    <span class="s">spec</span><span class="pi">:</span>
+      <span class="na">ports</span><span class="pi">:</span>
+<span class="err">    </span><span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">30100"</span>
+      <span class="na">port</span><span class="pi">:</span> <span class="m">30100</span>
+      <span class="na">targetPort</span><span class="pi">:</span> <span class="m">30100</span>
+        <span class="na">selector</span><span class="pi">:</span>
+      <span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-bulletin-board</span>
+      <span class="na">status</span><span class="pi">:</span>
+        <span class="na">loadBalancer</span><span class="pi">:</span> <span class="pi">{}</span>
+</code></pre></div></div>
+<p>The file defines the service of bulletin-board, and defines the name, port, and targetPort for the service, which is created by ‘kubectl expose’ to keep DNS capability in the cluster. Thus, other services can access the bulletin board and registry themselves.</p>
+
+<p>To the label and selector, it is useful to the situation of one-service to multiple-pods，When a pod dies, it is automatically removed from the endpoints, and new pods matching the Service’s selector will automatically get added to the endpoints.</p>
+
+<p>Read company-worker-deployment.yaml,</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">apiVersion</span><span class="pi">:</span> <span class="s">extensions/v1beta1</span>
+<span class="na">kind</span><span class="pi">:</span> <span class="s">Deployment</span>
+<span class="na">metadata</span><span class="pi">:</span>
+  <span class="na">creationTimestamp</span><span class="pi">:</span> <span class="no">null</span>
+  <span class="na">labels</span><span class="pi">:</span>
+<span class="err">	</span><span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-worker</span>
+  <span class="s">name</span><span class="pi">:</span> <span class="s">company-worker</span>
+<span class="na">spec</span><span class="pi">:</span>
+  <span class="na">replicas</span><span class="pi">:</span> <span class="m">1</span>
+  <span class="na">strategy</span><span class="pi">:</span> <span class="pi">{}</span>
+  <span class="na">template</span><span class="pi">:</span>
+<span class="err">	</span><span class="na">metadata</span><span class="pi">:</span>
+<span class="err">  	</span><span class="na">creationTimestamp</span><span class="pi">:</span> <span class="no">null</span>
+  <span class="err">	</span><span class="s">labels</span><span class="pi">:</span>
+<span class="err">    	</span><span class="s">io.kompose.service</span><span class="pi">:</span> <span class="s">company-worker</span>
+<span class="na">spec</span><span class="pi">:</span>
+  <span class="na">containers</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="na">env</span><span class="pi">:</span>
+    <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">ARTIFACT_ID</span>
+      <span class="na">value</span><span class="pi">:</span> <span class="s">worker</span>
+    <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">JAVA_OPTS</span>
+      <span class="na">value</span><span class="pi">:</span> <span class="s">-Dcse.service.registry.address=http://company-bulletin-board:30100 -Dservicecomb.tracing.collector.adress=http://zipkin:9411</span>
+    <span class="na">image</span><span class="pi">:</span> <span class="s">servicecomb/worker:0.0.1-SNAPSHOT</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">company-worker</span>
+    <span class="na">ports</span><span class="pi">:</span>
+    <span class="pi">-</span> <span class="na">containerPort</span><span class="pi">:</span> <span class="m">7070</span>
+    <span class="pi">-</span> <span class="na">containerPort</span><span class="pi">:</span> <span class="m">8080</span>
+    <span class="na">resources</span><span class="pi">:</span> <span class="pi">{}</span>
+  <span class="na">restartPolicy</span><span class="pi">:</span> <span class="s">Always</span>
+<span class="na">status</span><span class="pi">:</span> <span class="pi">{}</span>
+</code></pre></div></div>
+<p>The yaml defines a pod with one replica (replicas: 1), which can be modified to control the number of replicas of the pod(Anyway, the flexibility of the K8S scalability to achieve on-demand dynamic horizontal expansion to reach the purpose, material of K8S scalability will be provided later in the website). We mentioned that the company-bulletin-board is a DNS name, it is used as the value of servicecomb.service.registry.address and passed to the service within the pod, such as: -Dcse.service. Registry.address = http: // company-bulletin-board: 30100, <a href="https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/README.md">kube-dns</a> Automatically resolve the servicename.</p>
+
+<p>Read <a href="https://kubernetes.io/docs/concepts/services-networking/connect-applications-service/">connect-applications-service</a> to understanding the communication of services in K8S cluster.</p>
+
+<p>Other deployment.yaml and service.yaml are similar to the above except manager service, nodePort is defined in the company-manager-service.yaml to provide External-IP and Service-Port, as follows,</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spec</span><span class="pi">:</span>
+  <span class="na">ports</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">8083"</span>
+<span class="err">  	</span><span class="na">port</span><span class="pi">:</span> <span class="m">8083</span>
+<span class="err">  	</span><span class="na">targetPort</span><span class="pi">:</span> <span class="m">8080</span>
+<span class="err">  	</span><span class="na">nodePort</span><span class="pi">:</span> <span class="m">30301</span>
+<span class="err">  	</span><span class="na">protocol</span><span class="pi">:</span> <span class="s">TCP</span>
+  <span class="s">type</span><span class="pi">:</span> <span class="s">NodePort</span>
+</code></pre></div></div>
+
+<p>Get the External-IP and Service-Port by commands,</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>kubectl get svc company-manager <span class="nt">-o</span> yaml | <span class="nb">grep </span>ExternalIP <span class="nt">-C</span> 1
+kubectl get svc company-manager <span class="nt">-o</span> yaml | <span class="nb">grep </span>nodePort <span class="nt">-C</span> 1
+</code></pre></div></div>
+
+<p>Now, you can use the External-IP and nodePort to visit company, Read <a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop/blob/master/kubernetes/README.md">github.com/ServiceComb/ServiceComb-Company-WorkShop/kubernetes</a> to get details about how to visit it inside or outside the cluster.</p>
+
+<h2 id="model-induction">Model induction</h2>
+
+<p>You can sort out the following model by reading all the deployment.yaml and service.yaml in detail,</p>
+
+<p><img src="/assets/images/kubernetes-company.png" alt="kubernetes-company" class="align-center" /></p>
+
+<p>In addition, the classic air ticketing system ‘Acmeair’ has also been supported <a href="https://github.com/WillemJiang/acmeair/tree/master/kubernetes">one-click-deployment-at-kubernetes</a> based on the version developed by the ServiceComb framework.</p>
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+    <meta itemprop="headline" content="Eventual Data Consistency Solution in ServiceComb - part 1">
+    <meta itemprop="description" content="The background of data consistency problem in the scenario of microservice architecture">
+    <meta itemprop="datePublished" content="September 13, 2017">
+    <meta itemprop="dateModified" content="September 13, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Eventual Data Consistency Solution in ServiceComb - part 1
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Data consistency is a critical aspect of many systems, especially in cloud and microservice environment. We recently
+released <a href="https://github.com/apache/incubator-servicecomb-saga">Saga</a> project under ServiceComb to address data consistency issue. 
+But why is data consistency so important and what is Saga?</p>
+
+<h2 id="data-consistency-of-monolithic-applications">Data Consistency of Monolithic Applications</h2>
+<p>Imagine we are a giant corporation who runs an airline, a car rental company, and a hotel chain. We provide one-stop trip 
+planning experience for our customers, so that they only have to provide a destination and we will book a flight, rent a 
+car, and reserve a hotel room for them. From the business point of view, we have to make sure <strong>bookings with all the three
+are successful to make a successful trip plan, or there will be no plan</strong>.</p>
+
+<p>This requirement is easily satisfied with our current monolithic application. We just had to wrap all the three bookings 
+in a single database transaction and they would all be done successfully or none was done.</p>
+
+<p><img src="/assets/images/saga.monolithic.png" alt="Monolithic Application" class="align-center" /></p>
+
+<p>When this feature released, our business was happy, and our customer was happy.</p>
+
+<h2 id="data-consistency-in-the-microservice-scenario">Data Consistency in the Microservice Scenario</h2>
+<p>In a few years, our corporation is doing so well on this trip planning business and our customers grow over tenfold. As 
+more services provided by our airline, car rental company, and hotel chain, our application and development teams also 
+grow. Now our monolith is so big and complex that not a single person understands how everything works together. What's
+even worse is that it takes weeks for all the development teams to put together their changes for a new release. Our business
+is not happy, since our market share is dropping due to the delay of our new features.</p>
+
+<p>We decide to split our monolith into four microservices, flight booking, car rental, hotel reservation, and payment, after 
+several rounds of discussions. Services use their own database and communicate through HTTP requests. They are released
+according to their own schedule to meet the market needs. But we face a new problem: how do we ensure the original business 
+rule of bookings with all three services must be successful to make a trip plan? A service cannot just access another's
+database, because it violates the service boundary and services may not use the same database technology.</p>
+
+<p><img src="/assets/images/saga.service.boundary.png" alt="Service Boundary" class="align-center" /></p>
+
+<h2 id="sagas">Sagas</h2>
+<p>We found a <a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">great paper</a> by Hector &amp; Kenneth on the Internet talking about data consistency issues and this paper mentioned 
+a terminology named Saga.</p>
+
+<blockquote>
+  <p>A saga refers to a long live transaction that can be broken into a collection of sub-transactions that can be interleaved
+in any way with other transactions. Each sub transactions in this case is a real transaction in the sense that it preserves 
+database consistency. [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>In case of our business, a trip transaction is a saga which consists of four sub-transactions: flight booking, car rental, 
+hotel reservation, and payment.</p>
+
+<p><img src="/assets/images/saga.transactions.png" alt="Transactions" class="align-center" /></p>
+
+<p>Saga is also described in <a href="http://www.chrisrichardson.net/">Chris Richardson</a>'s article: <a href="http://microservices.io/patterns/data/saga.html">Pattern: Saga</a>.</p>
+<blockquote>
+  <p>Chris Richardson is an experienced software architect, author of POJOs in Action and the creator of the original CloudFoundry.com. [3]</p>
+</blockquote>
+
+<p>Caitie McCaffrey also showed how she applied saga pattern in <a href="https://en.wikipedia.org/wiki/Halo_4">Halo 4</a> by Microsoft in <a href="https://www.youtube.com/watch?v=xDuwrtwYHu8">her talk</a>.</p>
+
+<h3 id="how-saga-works">How Saga Works</h3>
+<blockquote>
+  <p>The transactions in a saga are related to each other and should be executed as a (non-atomic) unit. Any partial executions 
+of the saga are undesirable, and if they occur, must be compensated for. To amend partial executions, each saga transaction 
+T<sub>1</sub> should be provided with a compensating transaction C<sub>1</sub>.[<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>We define the following transactions and their corresponding compensations for our services according to the rule above:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: center">Service</th>
+      <th style="text-align: center">Transaction</th>
+      <th style="text-align: center">Compensation</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: center">flight booking</td>
+      <td style="text-align: center">book flight</td>
+      <td style="text-align: center">cancel booking</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">car rental</td>
+      <td style="text-align: center">rent car</td>
+      <td style="text-align: center">cancel booking</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">hotel reservation</td>
+      <td style="text-align: center">reserve room</td>
+      <td style="text-align: center">cancel reservation</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">payment</td>
+      <td style="text-align: center">pay</td>
+      <td style="text-align: center">refund</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p>Once compensating transactions C<sub>1</sub>, C<sub>2</sub>, …, C<sub>n-1</sub> are defined for saga T<sub>1</sub>, T<sub>2</sub>, …, T<sub>n</sub>, 
+then the system can make the following guarantee [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+  <ul>
+    <li>either the sequence T<sub>1</sub>, T<sub>2</sub>, …, T<sub>n</sub> (which is the preferable one)</li>
+    <li>or the sequence T<sub>1</sub>, T<sub>2</sub>, …, T<sub>j</sub>, C<sub>j</sub>, …, C<sub>2</sub>, C<sub>1</sub>, for some 0 &lt; j &lt; n, will be executed</li>
+  </ul>
+</blockquote>
+
+<p>In another word, with the above defined transaction/compensation pairs, saga guarantees the following business rules are met:</p>
+<ul>
+  <li>all the bookings are either executed successfully, or cancelled if any of them fails</li>
+  <li>if the payment fails in the last step, all bookings are cancelled too</li>
+</ul>
+
+<h3 id="saga-recovery">Saga Recovery</h3>
+<p>Two types of saga recovery were described in the <a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">original paper</a>:</p>
+<ul>
+  <li><strong>backward recovery</strong> <em>compensates</em> all completed transactions if one failed</li>
+  <li><strong>forward recovery</strong> <em>retries</em> failed transactions, assuming every sub-transaction will eventually succeed</li>
+</ul>
+
+<p>Apparently there is no need for compensating transactions in forward recovery, which is useful if sub-transactions will
+always succeed (eventually) or compensations are very hard or impossible for your business.</p>
+
+<p>Theoretically compensating transactions shall never fail. However, in the distributed world, servers may go down, network 
+can fail, and even data centers may go dark. What can we do in such situations? The last resort is to have fallbacks which
+may involve manual intervention.</p>
+
+<h3 id="the-restrictions-of-saga">The Restrictions of Saga</h3>
+<p>That looks promising. Are all long live transactions can be done this way? There are a few restrictions:</p>
+<ul>
+  <li>A saga only permits two levels of nesting, the top level saga and simple transactions [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</li>
+  <li>At the outer level, full atomicity is not provided. That is, sagas may view the partial results of other sagas [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</li>
+  <li>Each sub-transaction should be an independent atomic action [2]</li>
+</ul>
+
+<p>In our case, flight booking, car rental, hotel reservation, and payment are naturally independent actions and transaction
+of each can be performed atomically with their corresponding databases.</p>
+
+<p>We don't need atomicity at the trip transaction level either. One user may book the last seat on a flight which gets 
+cancelled later due to insufficient balance in credit card. Another user may see the flight fully booked and one seat freed
+up for booking due to the cancellation. He/she can grab the last flight seat and complete the trip plan. It does not really
+matter to our business.</p>
+
+<p>There are also things to consider on compensations.</p>
+<blockquote>
+  <p>The compensating transaction undoes, from a semantic point of view, any of the actions performed by T<sub>i</sub>, but 
+does not necessarily return the database to the state that existed when the execution of T<sub>i</sub> began. (For instance,
+if a transaction fires a missile, it may not be possible to undo this action) [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>However, this is not a problem at all for our business. And it is still possible to compensate for actions hard to undo. For
+example, a transaction sending an email can be compensated by sending another email explaining the problem.</p>
+
+<h2 id="summary">Summary</h2>
+<p>Now we have a solution to tackle our data consistency issue with saga. It allows us to either successfully perform all
+transactions or compensate succeeded ones in case any fails. Although saga does not provide <a href="https://en.wikipedia.org/wiki/ACID">ACID</a> guarantee, it still suits
+many scenarios where eventual data consistency is enough. How do we design a saga system? Let's address the question in our
+next blog post.</p>
+
+<h2 id="references">References</h2>
+<ol>
+  <li><a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Original Paper on Sagas</a> by By Hector Garcia-Molina &amp; Kenneth Salem</li>
+  <li>Gifford, David K and James E Donahue, “Coordinating Independent Atomic Actions”, Proceedings of IEEE COMPCON, San Francisco, CA, February, 1985</li>
+  <li>Chris Richardson: http://www.chrisrichardson.net/</li>
+  <li>ServiceComb Saga Project: https://github.com/apache/incubator-servicecomb-saga</li>
+</ol>
+
+
+        
+      </section>
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+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> Updated:</strong> <time datetime="2017-09-13">September 13, 2017</time></p>
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+    <meta itemprop="description" content="The design of distributed saga in ServiceComb">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Eventual Data Consistency Solution in ServiceComb - part 2
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>In my <a href="/docs/distributed_saga_1/">previous post</a>, I talked about how <a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Saga</a> can 
+be used to solve the data consistency issue of our trip planning application. Now let's gather the requirements to design
+a saga.</p>
+
+<h2 id="saga-log">Saga Log</h2>
+<p>Saga guarantees either all sub-transactions are committed or compensated for, but the saga system itself may crash. There
+are a few states that a saga may be in on crash:</p>
+<ul>
+  <li>Saga received a request, but no transaction started yet. States of services involved in sub-transactions are not modified
+by saga, nothing has been done.</li>
+  <li>Some sub-transactions were done. When restarted, saga has to resume from the last completed transaction.</li>
+  <li>A sub-transaction was started, but not completed yet. Since we are not sure if the remote service completed the transaction, 
+failed the transaction, or the request to remote service timed out, saga has to redo the sub-transaction on restart. That also
+means sub-transactions have to be idempotent.</li>
+  <li>A sub-transaction failed and its compensating transaction has not started yet. Saga has to resume from the compensating
+transaction on restart.</li>
+  <li>A compensating transaction started but not completed yet. The solution is basically the same as the previous one. That means
+compensating transactions have to idempotent too.</li>
+  <li>All sub-transactions or compensating transactions were done, which is the same as the first case.</li>
+</ul>
+
+<p>In order for saga to recover to the states mentioned above, we have to keep track of each step of sub-transactions and
+compensating transactions. We decided to achieve that by saving the following events in a persistent store called saga log:</p>
+<ul>
+  <li><strong>Saga started event</strong> stores the entire saga request, which includes multiple transaction/compensation requests</li>
+  <li><strong>Transaction started event</strong> stores individual transaction request</li>
+  <li><strong>Transaction ended event</strong> stores individual transaction request and its response</li>
+  <li><strong>Transaction aborted event</strong> stores individual transaction request and the cause of failure</li>
+  <li><strong>Transaction compensated event</strong> stores individual compensation request and its response</li>
+  <li><strong>Saga ended event</strong> marks the end of a saga request and stores nothing</li>
+</ul>
+
+<p><img src="/assets/images/saga.events.png" alt="Events" class="align-center" /></p>
+
+<p>By persisting these events in saga log, a crashed saga can be recovered to any states above.</p>
+
+<p>Since saga only needs persistence of events and the event contents are stored as JSON, the implementation of the saga log 
+is very flexible. Databases (SQL or NoSQL), durable message queues, or even plain files can be used as event storage, but
+some are faster for saga to recover.</p>
+
+<h2 id="request-data-structure-of-saga">Request Data Structure of Saga</h2>
+<p>In our case, flight booking, car rental, and hotel reservation have no dependency among each other at all and they can be
+processed in parallel. However, it's more user friendly for our customers to only charge their credit cards once, when all 
+the bookings are done successfully. That means the transactions of the four services look like the graph below.</p>
+
+<p><img src="/assets/images/saga.transactions.png" alt="Transactions" class="align-center" /></p>
+
+<p>It makes sense to implement the data structure of trip planning request as a <a href="https://en.wikipedia.org/wiki/Directed_acyclic_graph">Directed Acyclic Graph</a>.
+The root of the graph is saga start task and the leaf is saga end task.</p>
+
+<p><img src="/assets/images/saga.graph.png" alt="Request Graph" class="align-center" /></p>
+
+<h2 id="parallel-saga">Parallel Saga</h2>
+<p>As mentioned above, flight booking, car rental, and hotel reservation can be processed in parallel. But doing so creates
+another problem: what if flight booking failed while car rental is being processed? We can't keep waiting for the response
+from car rental service, because we have no idea how long it will take.</p>
+
+<p>THe best thing we can do is to send the car rental request again and hope we get a response so that we can continue our 
+backward recovery. If car rental service never responds, we may have to fallback with manual intervention.</p>
+
+<p>The delayed booking request may still be received by the remote car rental service. When it does, the service has already
+processed the same booking and its cancellation request.</p>
+
+<p><img src="/assets/images/saga.commutative.png" alt="Network Latency" class="align-center" /></p>
+
+<p>Therefore, services have to implement transactions and compensations in such a way that transaction request received after
+its compensation request takes no effect. Caitie McCaffrey called this <strong>commutative compensating request</strong> in her talk 
+on <a href="https://www.youtube.com/watch?v=1H6tounpnG8">Distributed Sagas: A Protocol for Coordinating Microservices</a>.</p>
+
+<h2 id="acid-and-saga">ACID and Saga</h2>
+<p><a href="https://en.wikipedia.org/wiki/ACID">ACID</a> is consistency model with the following properties:</p>
+<ul>
+  <li>Atomicity</li>
+  <li>Consistency</li>
+  <li>Isolation</li>
+  <li>Durability</li>
+</ul>
+
+<p>Saga does not provide ACID guarantee, because atomicity and isolation are not satisfied according to the <a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">paper</a></p>
+<blockquote>
+  <p>full atomicity is not provided. That is, sagas may view the partial results of other sagas [<a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">1</a>]</p>
+</blockquote>
+
+<p>With durable saga log, saga guarantees consistency and durability.</p>
+
+<h2 id="saga-architecture">Saga Architecture</h2>
+<p>Finally, the architecture of our saga looks like this</p>
+
+<p><img src="/assets/images/saga.design.png" alt="Saga Architecture" class="align-center" /></p>
+
+<ul>
+  <li>Saga execution component parses the request JSON and builds a graph of requests</li>
+  <li>TaskRunner ensures the execution order of requests with task queue</li>
+  <li>TaskConsumer processes tasks to write events to saga log and send requests to remote services</li>
+</ul>
+
+<h2 id="summary">Summary</h2>
+<p>In this article, we talked about how saga can be implemented with a saga log to persist transaction/compensation events 
+and request graph. A crashed saga can also be recovered from all the persisted events in saga log on restart. However,
+there are a few requirements on design of microservices to ensure saga consistency guarantee:</p>
+<ul>
+  <li>transaction and compensation requests must be idempotent</li>
+  <li>compensation requests must be commutative</li>
+</ul>
+
+<h2 id="references">References</h2>
+<ol>
+  <li><a href="https://www.cs.cornell.edu/andru/cs711/2002fa/reading/sagas.pdf">Original Paper on Sagas</a> by By Hector Garcia-Molina &amp; Kenneth Salem</li>
+</ol>
+
+
+        
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+    <meta itemprop="headline" content="Eventual Data Consistency Solution in ServiceComb - part 3">
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+    <meta itemprop="dateModified" content="September 18, 2017">
+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Eventual Data Consistency Solution in ServiceComb - part 3
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>In my <a href="/docs/distributed_saga_2/">previous post</a>, I talked about how <a href="https://en.wikipedia.org/wiki/Two-phase_commit_protocol">Saga</a> in
+ServiceComb is designed. However, there are quite a few data consistency solutions such as Two-Phase Commit (2PC) 
+and Try-Confirm/Cancel (TCC). What makes saga special?</p>
+
+<h2 id="two-phase-commit-2pc">Two-Phase Commit (2PC)</h2>
+<blockquote>
+  <p>Two-phase commit protocol is a distributed algorithm that coordinates all the processes that participate in a distributed 
+atomic transaction on whether to commit or abort (roll back) the transaction. <a href="https://en.wikipedia.org/wiki/Two-phase_commit_protocol">1</a></p>
+</blockquote>
+
+<p>It has two phases:</p>
+<ul>
+  <li><strong>voting phase</strong> coordinator sends vote request to all services and services respond with either yes or no. If any service
+refuse with no or timeout, coordinator sends abort message in the next phase.</li>
+</ul>
+
+<p><img src="/assets/images/saga.2pc.phase1.png" alt="voting phase" class="align-center" /></p>
+
+<ul>
+  <li><strong>decision phase</strong> if all services say yes, coordinator sends commit message to services and services acknowledge either
+transaction done or failed. If any service fails to commit, coordinator will initiate additional rounds to abort the transaction.</li>
+</ul>
+
+<p><img src="/assets/images/saga.2pc.phase2.png" alt="decision phase" class="align-center" /></p>
+
+<p>Between the end of voting phase and the end of decision phase, services are in <strong>uncertain</strong> state, because they are not sure
+if the transaction is going to proceed or not. When a service is in uncertain state and loses connection with coordinator,
+it may either wait for coordinator's recovery, or consult other services in certain state for coordinator's decision.
+In the worst case, n uncertain services broadcasting messages to other n - 1 services will incur <strong>O(n<sup>2</sup>)</strong> messages.</p>
+
+<p>Another disadvantage of 2PC is that it is a blocking protocol. A service will block and lock resources, while waiting for
+decision from coordinator after voting. 2PC does not scale well when the number of services involved in a transaction grows,
+because of its blocking mechanism and worst case time complexity.</p>
+
+<p>More details on implementation of 2PC can be found at <a href="https://cs.nyu.edu/courses/spring03/G22.2631-001/lecture8.pdf">2</a> and <a href="http://courses.cs.vt.edu/~cs5204/fall00/distributedDBMS/duckett/tpcp.html">3</a>.</p>
+
+<h2 id="try-confirmcancel-tcc">Try-Confirm/Cancel (TCC)</h2>
+<p>TCC is a compensating transaction pattern for business model that is two-phased.</p>
+<ul>
+  <li><strong>try phase</strong> puts a service in pending state. For example, a try request in our flight booking service will reserve a
+seat for the customer and insert a customer reservation record with reserved state into database. If any service fails to
+make a reservation or times out, the coordinator will send a cancel request in the next phase.</li>
+</ul>
+
+<p><img src="/assets/images/saga.tcc.try.png" alt="try phase" class="align-center" /></p>
+
+<ul>
+  <li><strong>confirm phase</strong> moves the service to confirmed state. A confirm request will confirm that a seat is booked for the 
+customer and he or she will be billed. The customer reservation record in database will be updated to confirmed state.
+If any service fails to confirm or times out, the coordinator will either retry confirmation until success or involve manual
+intervention after it retries a certain number of times.</li>
+</ul>
+
+<p><img src="/assets/images/saga.tcc.confirm.png" alt="confirm phase" class="align-center" /></p>
+
+<p>Comparing with saga, TCC has an advantage in that try phase transitions services into pending state instead of final
+state, which makes cancellation trivial to design.</p>
+
+<p>For example, a try request for an email service may mark an email as ready to send and the email is only sent on confirm 
+request. Its corresponding cancel request needs only to mark the email as obsolete. However, in case of using saga, a transaction
+will send the email and its corresponding compensating transaction may have to send another email to explain the problem.</p>
+
+<p>The disadvantage of TCC, comparing with saga, is that its two-phased protocol requires services to be designed with additional
+pending state and interface to handle try request. And it may take twice the time to complete a TCC request than a saga request,
+because TCC communicates with each service twice and the confirm phase can only be started when responses of try request
+are received from all services.</p>
+
+<p>More detailed explanation of TCC can be found at <a href="https://www.infoq.com/presentations/Transactions-HTTP-REST">Transactions for the REST of Us</a>.</p>
+
+<h2 id="event-driven-architecture">Event Driven Architecture</h2>
+<p>In event driven architecture, just like TCC, an extra pending status is required for each service involved in a long live transaction.
+Services receiving transaction request insert a new record into its database with pending status and send a new event to
+the next service in the transaction sequence.</p>
+
+<p>Because it's possible that a service crashes after inserting the record and we are not sure if the new event is sent,
+an extra event table is required for each service to keep track of which step the current long live transaction is in.</p>
+
+<p><img src="/assets/images/saga.event.driven.request.png" alt="event driven architecture - request" class="align-center" /></p>
+
+<p>Once the last service in the long live transaction completes its job, it notifies the previous service in the transaction.
+Services receiving completion event set its record status to done in its database.</p>
+
+<p><img src="/assets/images/saga.event.driven.response.png" alt="event driven architecture - response" class="align-center" /></p>
+
+<p>If you look closer, event driven architecture is just like a decentralized implementation of event driven TCC. If we remove
+the pending state for each service, this architecture looks like a decentralized and event driven saga.
+Being decentralized is good, but it creates much tighter coupling between services. Let's assume a new business requirement adds a new
+process D between B and C. With event driven architecture, service B and C have to change their code to accommodate the new 
+process D.</p>
+
+<p><img src="/assets/images/saga.event.coupling.png" alt="event driven architecture - coupling" class="align-center" /></p>
+
+<p>On the contrary, all these coupling is in saga and no change is required for existing services when a new process is added
+to the long live transaction.</p>
+
+<p>More details can be found at <a href="https://www.nginx.com/blog/event-driven-data-management-microservices/">Event-Driven Data Management for Microservices</a>.</p>
+
+<h2 id="centralized-vs-decentralized">Centralized vs Decentralized</h2>
+<p>This blog series have been talked about centralized saga. But saga can be implemented as decentralized solution too. 
+How does the decentralized version look like?</p>
+
+<p>The decentralized version of saga does not have a dedicated coordinator. Whoever calling the next service
+in the transaction becomes the current coordinator instead. For example,</p>
+<ul>
+  <li>service A receives a request requiring data consistency across service A, B, and C.</li>
+  <li>A does its job and passes the request to the next service in the request, service B.</li>
+  <li>B completes its part and passes the request to C, and so on.</li>
+  <li>If C fails to process the request, it is B's responsibility to initiate its compensating transaction and asks A to rollback.</li>
+</ul>
+
+<p><img src="/assets/images/saga.decentralized.png" alt="decentralized saga" class="align-center" /></p>
+
+<p>Comparing with centralized one, the decentralized version has the advantage of service autonomy. But each service is
+coupled with data consistency protocol, which may require additional persistence infrastructure.</p>
+
+<p>We love services implementing business rules to be autonomous, but there are many application related complexity such as
+data consistency, service monitoring, and message passing, that are better to be centralized, so that business services
+are able to focus on dealing with business complexity instead of application complexity. That's why we designed centralized saga.</p>
+
+<p>In addition, the relationship among services in a long live transaction becomes harder and harder to understand, as the 
+number of services grows. It may quickly grow into a death star like the image below.</p>
+
+<p class="figure-caption"><img src="/assets/images/saga.death.star.png" alt="death star architecture" class="align-center" />
+Image source: http://www.slideshare.net/BruceWong3/the-case-for-chaos (s12)</p>
+
+<p>Meanwhile, locating the root cause of a problem in a long live transaction also becomes more troublesome, since the 
+service logs are spread all over cluster nodes.</p>
+
+<h2 id="summary">Summary</h2>
+<p>In this article, we compared saga with other data consistency solutions. Saga is more scalable than two-phase commit and
+is preferable to TCC in scenarios where compensating transactions are feasible and minimal changes to business logic is
+required. Centralized saga decouples services from data consistency logic and its persistence infrastructure
+and allows easier troubleshooting of any problem occurred in transactions.</p>
+
+<h2 id="references">References</h2>
+<ol>
+  <li><a href="https://en.wikipedia.org/wiki/Two-phase_commit_protocol">https://en.wikipedia.org/wiki/Two-phase_commit_protocol</a></li>
+  <li><a href="https://cs.nyu.edu/courses/spring03/G22.2631-001/lecture8.pdf">https://cs.nyu.edu/courses/spring03/G22.2631-001/lecture8.pdf</a></li>
+  <li><a href="http://courses.cs.vt.edu/~cs5204/fall00/distributedDBMS/duckett/tpcp.html">http://courses.cs.vt.edu/~cs5204/fall00/distributedDBMS/duckett/tpcp.html</a></li>
+  <li><a href="https://www.infoq.com/presentations/Transactions-HTTP-REST">https://www.infoq.com/presentations/Transactions-HTTP-REST</a></li>
+  <li><a href="https://www.nginx.com/blog/event-driven-data-management-microservices/">https://www.nginx.com/blog/event-driven-data-management-microservices/</a></li>
+</ol>
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+        
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+          
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+            
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+            <li><a href="/docs/service-center/registration-discovery/" class="">Registration&Discovery</a></li>
+          
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+            <li><a href="/docs/quick-start/" class="">Get started</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/quick-start-bmi/" class="">Develop microservice application in minutes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/quick-start-advance/" class="">Advance microservice development</a></li>
+          
+            
+            
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+            
+            
+
+            <li><a href="/docs/quick-start-advance/load-balance/" class="">Load Balance</a></li>
+          
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+            
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+            <li><a href="/docs/quick-start-advance/flow-control/" class="">Flow Control</a></li>
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+            <li><a href="/docs/quick-start-advance/service-management/" class="">Service Management</a></li>
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+            <li><a href="/docs/quick-start-advance/distributed-tracing/" class="">Distributed Tracing</a></li>
+          
+        </ul>
+        
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+      <li>
+        
+          <span class="nav__sub-title">Use mesher to merge into the servicecomb microservice system</span>
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+          
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+          
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+            <li><a href="/docs/mesher-quick-start-advance/mesher-service-management/" class="">mesher Service Management</a></li>
+          
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+          
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+        
+          <span class="nav__sub-title">A contract-based microservice development toolkit</span>
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+        
+          <span class="nav__sub-title">A multiple servicecenters synchronization tool</span>
+        
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+          
+            
+            
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+            
+
+            <li><a href="/docs/syncer/multi-servicecenters/" class="">Different service centers communicate with each other</a></li>
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+      
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+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="getting-started">Getting Started</h2>
+<p>Apache ServiceComb is an open source solution for microservices. It consists of multiple components that can be flexibly adapted to different scenarios through the combination of components. This guide can help you get started quickly with Apache ServiceComb, which is the best place to start trying for first-time users.</p>
+<ol>
+  <li>Download <a href="/release/">the ServiceComb release</a>component</li>
+  <li><a href="/docs/service-center/install/">Install service-center</a></li>
+  <li><a href="/docs/service-center/registration-discovery/">Registration&amp;Discovery</a></li>
+  <li>Select the quick start instructions for the appropriate development language to use.
+    <ul>
+      <li><a href="/docs/quick-start/">Development of microservices application based on java microservice SDK</a></li>
+      <li><a href="/docs/mesher-quick-start/">Use mesher to merge into the servicecomb microservice system</a></li>
+    </ul>
+  </li>
+  <li>If the project involves multi-party collaboration, or legacy systems want to transform into microservices
+<a href="/docs/toolkit/quick-start/">A contract-based microservice development toolkit</a></li>
+</ol>
+
+<h2 id="advanced">Advanced</h2>
+<ol>
+  <li><a href="/docs/syncer/quick-start/">A multiple servicecenters synchronization tool</a></li>
+</ol>
+
+<h2 id="more">More</h2>
+<p>After completing the above, you can learn in depth through each service user manual:<br />
+<a href="/docs/users/">ServiceComb User Manual</a></p>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="单体应用利用ServiceComb实现微服务化和云化之路">
+    <meta itemprop="description" content="该文档演示：从已有基于spring boot的单体应用利用ServiceComb实现微服务化和云化之路">
+    <meta itemprop="datePublished" content="June 24, 2017">
+    <meta itemprop="dateModified" content="June 24, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">单体应用利用ServiceComb实现微服务化和云化之路
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="背景">背景</h2>
+
+<ol>
+  <li>
+    <p>Service Stage：微服务云应用平台，它是面向企业及开发者的一站式DevOps平台服务，支持基于微服务的应用开发、治理、部署及运维监控的全生命周期管理，并提供大规模容器集群管理及中间件服务等平台能力，帮助用户快速构建云分布式应用。</p>
+  </li>
+  <li>
+    <p>本指导以Acmeair demo为例，演示如何使用ServiceComb (华为微服务框架开源版本)实现应用的微服务化，并利用Service Stage云平台上实现应用的云化。</p>
+  </li>
+</ol>
+
+<h2 id="服务化和云化步骤">服务化和云化步骤</h2>
+
+<ul>
+  <li>
+    <p>环境准备：基于Service Stage完成创建集群、添加节点等资源准备工作</p>
+  </li>
+  <li>
+    <p>微服务开发</p>
+
+    <ol>
+      <li>
+        <p>微服务的拆分设计</p>
+      </li>
+      <li>
+        <p>基于ServiceComb框架快速微服务化</p>
+      </li>
+      <li>
+        <p>制作镜像上传Service Stage软件仓库；</p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>应用上线：通过Service Stage从软件仓库获取版本实现部署上线；</p>
+  </li>
+  <li>
+    <p>应用运维：通过Service Stage对微服务或应用进行生命周期管理（部署-启动-上线-升级-扩容-停止-下线-删除）、告警、监控、调用链分析和治理等。</p>
+  </li>
+</ul>
+
+<h2 id="环境准备创建集群添加节点完成节点自动纳管">环境准备：创建集群、添加节点，完成节点自动纳管</h2>
+<h3 id="创建集群">创建集群</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053496188.html">创建集群详细指导</a><br />
+<img src="/assets/images/create-group.png" alt="create group" class="align-center" /></p>
+
+<h3 id="添加节点">添加节点</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053443149.html">为集群添加节点详细指导</a> <br />
+<img src="/assets/images/add-node.png" alt="add node" class="align-center" /></p>
+
+<h2 id="微服务开发">微服务开发</h2>
+<h3 id="应用架构设计划分微服务识别服务依赖关系">应用架构设计，划分微服务，识别服务依赖关系</h3>
+<p><img src="/assets/images/micro-service-design.png" alt="micro service design" class="align-center" /></p>
+
+<h3 id="创建微服务-单体应用微服务应用">创建微服务: 单体应用—&gt;微服务应用</h3>
+<p><img src="/assets/images/micro-service-structure.PNG" alt="micro service structure" class="align-center" /></p>
+
+<h3 id="简单4步servicecomb帮你完成微服务化改造">简单4步ServiceComb帮你完成微服务化改造</h3>
+<p>备注：改造完成的Acmeair Demo如何本地运行，如何本地查看运行效果？ 请参考下文“Acmeair本地运行”章节。</p>
+<h4 id="step-1-pom引入对servicecomb和service-stage的依赖">Step 1: POM引入对ServiceComb和Service Stage的依赖</h4>
+<p>对ServiceComb的依赖：
+<img src="/assets/images/pom-dependence.png" alt="pom dependence" class="align-center" /></p>
+
+<p>对Service Stage的依赖： <br />
+<img src="/assets/images/huaweicloud_dependencies.png" alt="huaweicloud dependencies" class="align-center" /></p>
+
+<h4 id="step-2-增加微服务描述文件和spring配置文件">Step 2 增加微服务描述文件和spring配置文件</h4>
+<p><img src="/assets/images/config-file.png" alt="config file" class="align-center" /></p>
+
+<h4 id="step-3-引入servicecomb注解一行代码完成服务发布">Step 3: 引入ServiceComb注解一行代码完成服务发布</h4>
+<p><img src="/assets/images/code-adjust.png" alt="code adjust" class="align-center" /></p>
+
+<h4 id="step-4-使用servicecomb接口简单创建resttemplate完成服务消费也支持注解方式进行消费">Step 4: 使用ServiceComb接口简单创建RestTemplate完成服务消费（也支持注解方式进行消费）</h4>
+<p><img src="/assets/images/service-consumer.png" alt="service consumer" class="align-center" /></p>
+
+<h3 id="制作镜像上传到云镜像中心">制作镜像上传到云镜像中心</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0055101643.html">上传镜像详细指导</a><br />
+<img src="/assets/images/image-upload-1.png" alt="image upload 1" class="align-center" /><br />
+<img src="/assets/images/image-upload-2.png" alt="image upload 2" class="align-center" /></p>
+
+<h2 id="应用上线利用应用管理实现部署上线">应用上线：利用应用管理实现部署上线</h2>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/user_deployService.html">部署微服务详细指导</a> <br />
+<img src="/assets/images/service-deploy.png" alt="service deploy" class="align-center" /></p>
+
+<h2 id="应用运维保障应用平稳运行">应用运维：保障应用平稳运行</h2>
+<h3 id="微服务调用链分析">微服务调用链分析</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053555508.html">应用调用分析详细指导</a><br />
+ <img src="/assets/images/service-monitor-1.png" alt="service monitor 1" class="align-center" /></p>
+
+<h3 id="微服务状态监控">微服务状态监控</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053555506.html">应用监控详细指导</a><br />
+<img src="/assets/images/service-monitor-2.png" alt="service monitor 2" class="align-center" /></p>
+
+<h3 id="按需弹性伸缩">按需弹性伸缩</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0054051691.html">弹性伸缩详细指导</a><br />
+<img src="/assets/images/scaling.png" alt="scaling" class="align-center" /></p>
+
+<h3 id="微服务可视化治理">微服务可视化治理</h3>
+<p>请参考<a href="http://support.hwclouds.com/usermanual-servicestage/zh-cn_topic_0053560172.html">微服务管理详细指导</a><br />
+<img src="/assets/images/governance.png" alt="governance" class="align-center" /></p>
+
+<h1 id="acmeair本地运行">Acmeair本地运行</h1>
+<p>本章节介绍在windows 64位环境下如何本地运行Acmeair</p>
+
+<h2 id="环境准备">环境准备</h2>
+
+<ul>
+  <li>
+    <p>JDK 1.8</p>
+  </li>
+  <li>
+    <p>maven 3.x</p>
+  </li>
+  <li>
+    <p>eclipse</p>
+  </li>
+  <li>
+    <p>service-center</p>
+  </li>
+</ul>
+
+<p>  下载<a href="https://github.com/apache/incubator-servicecomb-service-center/releases">service-center-x.x.x-x-windows-amd64.zip</a>解压到任意目录</p>
+
+<ul>
+  <li>
+    <p>mongodb（可选）</p>
+  </li>
+  <li>
+    <p>下载<a href="https://github.com/TankTian/acmeair/archive/master.zip">acmeair源码</a></p>
+  </li>
+</ul>
+
+<h2 id="导入项目并构建">导入项目并构建</h2>
+<h3 id="将acmeair项目导入eclipse">将acmeair项目导入eclipse</h3>
+<p>Import - - Maven:Existing Maven Projects，选择代码所在的目录，点击finish完成导入  <br />
+<img src="/assets/images/import-project.png" alt="import project" class="align-center" /></p>
+
+<h3 id="修改微服务描述文件">修改微服务描述文件</h3>
+
+<ol>
+  <li>
+    <p>acmeair-booking-service\src\main\resources\microservice.yaml<br />
+<img src="/assets/images/booking-microservice-yaml.png" alt="booking microservice yaml" class="align-center" /></p>
+  </li>
+  <li>
+    <p>acmeair-customer-service\src\main\resources\microservice.yaml <br />
+<img src="/assets/images/customer-microservice-yaml.png" alt="customer microservice yaml" class="align-center" /></p>
+  </li>
+  <li>
+    <p>acmeair-website\src\main\resources\microservice.yaml<br />
+<img src="/assets/images/website-microservice-yaml.png" alt="website microservice yaml" class="align-center" /></p>
+  </li>
+</ol>
+
+<h3 id="执行-mvn-install-结果-build-success-项目完成构建">执行 mvn install 结果 BUILD SUCCESS ，项目完成构建</h3>
+<p><img src="/assets/images/compile.png" alt="compile" class="align-center" /></p>
+
+<h2 id="启动服务">启动服务</h2>
+<h3 id="service-center">service-center</h3>
+<p>找到service-center-0.1.0-m1-windows-amd64解压目录，双击start.bat<br />
+<img src="/assets/images/servcie-center.png" alt="servcie center" class="align-center" /> <br />
+<img src="/assets/images/service-center-start-success.png" alt="service center start success" class="align-center" /></p>
+
+<h3 id="acmeair-booking">acmeair-booking</h3>
+<p>AcmeairApplication:Run As - - Run Configurations…<br />
+<img src="/assets/images/start-booking.png" alt="start booking" class="align-center" />  <br />
+watching microservice 2 successfully，服务注册成功<br />
+<img src="/assets/images/booking-start-success.png" alt="booking start success" class="align-center" /></p>
+
+<h3 id="acmeair-customer">acmeair-customer</h3>
+<p>CustomerServiceApplication:Run As - - Run Configurations…<br />
+<img src="/assets/images/start-customer.png" alt="start customer" class="align-center" /> <br />
+watching microservice 4 successfully，服务注册成功<br />
+<img src="/assets/images/customer-start-success.png" alt="customer start success" class="align-center" /></p>
+
+<h3 id="acmeair-website">acmeair-website</h3>
+<p>将acmeair-website\target\ROOT.war复制到tomcat webapps文件夹下，启动tomcat<br />
+<img src="/assets/images/start-website.png" alt="start website" class="align-center" /></p>
+
+<h2 id="前台访问">前台访问</h2>
+<p>输入http://localhost:8080<br />
+<img src="/assets/images/home-page.png" alt="home page" class="align-center" /></p>
+
+<p>点击网页最下端Acme航空配置<br />
+<img src="/assets/images/init-data.png" alt="init data" class="align-center" /></p>
+
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content/docs/how-to-reform-a-legacy-system/index.html

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@@ -0,0 +1,1179 @@
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+    <meta itemprop="headline" content="最头疼的遗留系统该如何改造？">
+    <meta itemprop="description" content="微服务是否是业界期待已久的企业架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？">
+    <meta itemprop="datePublished" content="October 23, 2017">
+    <meta itemprop="dateModified" content="October 23, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">最头疼的遗留系统该如何改造？
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>随着RESTful、云计算、DevOps、持续交付等概念的深入人心，微服务（Microservices）逐渐成为系统架构的一个代名词。那么微服务是否是业界期待已久的架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？在该分享中，王磊将通过实际的案例，跟大家探讨使用微服务改造遗留系统的实践之路。</p>
+
+<ul>
+  <li>什么是微服务</li>
+  <li>微服务的诞生背景</li>
+  <li>遗留系统的微服务改造策略</li>
+  <li>微服务改造之路</li>
+</ul>
+
+<h2 id="背景">背景</h2>
+<p>什么是系统架构设计？</p>
+
+<p>一直以来，系统架构设计是IT领域经久不衰的话题之一，是每个系统构建过程中极其关键的一部分，它决定了系统是否能够被正确、有效的构建。架构师们也一直在持续探索，寻找更优秀的架构设计方式来构建系统。</p>
+
+<p>那什么是系统的架构设计？对于这个问题，我相信每个朋友都会有不同的定义，实际上，也并没有一个标准的答案来解释什么是架构设计。</p>
+
+<p>基于我过去的经验和工作方式，我认为系统架构设计的本质，是在应用系统内部找到这样一个动态平衡：平衡业务、技术、团队的同时，考虑系统灵活性、可扩展性以及可维护性等因素，并将应用系统划分成不同的部分，使这些部分彼此之间相互分工、相互协作，从而为用户提供某种特定的价值的方式。</p>
+
+<p>随着RESTful、云计算、DevOps、持续交付等概念的深入人心，<strong>微服务架构逐渐成为系统架构的一个代名词</strong>。</p>
+
+<h2 id="什么是微服务架构">什么是微服务架构</h2>
+<p>2015年，微服务架构这个词，以相当高的频率出现在各种演讲、文章、会议、社区上。这里，我先和大家快速回顾一下，Martin Fowler对微服务的抽象。</p>
+
+<p><img src="/assets/images/microservice_definition_by_martin_folwer.jpeg" alt="" /></p>
+
+<p>如上所示，微服务架构的核心四要素，我用红色标注出来了。如果翻译成中文，大致如下所示：</p>
+
+<blockquote>
+  <p>微服务架构是一种架构模式，它提倡将单一应用程序划分成一组小的服务，服务之间互相协调、互相配合，为用户提供最终价值。 每个服务运行在其独立的进程中，服务与服务间采用轻量级的通信机制互相协作（通常是基于HTTP协议的RESTful API）。 每个服务都围绕着具体业务进行构建，并且能够被独立的部署到生产环境、类生产环境等。 另外，对具体的服务而言，应根据业务上下文，选择合适的语言、工具对其进行构建。</p>
+</blockquote>
+
+<p>总结成一句话就是<strong>微服务是围绕业务构建的细粒度的分布式系统</strong>。</p>
+
+<h2 id="微服务的诞生背景">微服务的诞生背景</h2>
+<p>2015年，微服务突然火了，为什么？</p>
+
+<p>其实微服务架构并不是技术创新，而是IT发展到现阶段对技术架构的一种阐释。</p>
+
+<p>它要求包括<strong>快速和业务对齐（aligning business）、理解和抽象业务（基于领域建模）、快速开发（Lean、Agile）、快速反馈和交付（CI、CD、DevOps）</strong>。</p>
+
+<p>所以说，微服务并不是技术，而是将化整为零（或称分治）思想换了一种说法，无论是把一个大型系统分割成多个小而自治的系统，还是把一个大型团队分成多个团队，或是把一个复杂的项目分成多个交付阶段都是这种思想的运用。</p>
+
+<p>当然，任何新事物的诞生，总会有一个推动因素。微服务的诞生也并非偶然。它是互联网高速发展，技术日新月异的变化以及传统架构无法适应快速变化等多重因素的推动下所诞生的产物。</p>
+
+<p>基于个人的理解，我将微服务的诞生因素总结为如下几点：</p>
+
+<p><img src="/assets/images/why_microservice_show_up.jpeg" alt="" /></p>
+
+<ol>
+  <li>
+    <p><strong>互联网行业的快速发展</strong></p>
+
+    <p>过去的十年中，互联网对我们的生活产生了翻天覆地的变化，越来越多的传统行业公司也开始依赖互联网技术打造其核心竞争优势。</p>
+
+    <p>在这种情况下，如何从系统架构的角度出发，构建灵活、易扩展的系统，快速应对需求的变化；同时，随着用户量的增加，如何保证系统的可伸缩性、高可用性，成为系统架构面临的挑战。</p>
+  </li>
+  <li>
+    <p><strong>单块架构系统面临的挑战</strong></p>
+
+    <p>随着用户需求个性化、产品生命周期变短、市场需求不稳定等因素的出现，单块架构系统面临着越来越多的挑战。如何找到一种更有效的、更灵活、适应需求的系统架构方式，成为大家关注的焦点。</p>
+  </li>
+  <li>
+    <p><strong>敏捷、精益方法、持续交付的深入人心</strong></p>
+
+    <p>在IT行业发展的过去十年，敏捷、精益、持续交付等价值观、方法论的提出以及实践，让很多组织意识到应变市场变化、提高响应力的重要性，应该构建软件交付周期的闭环（分析、开发、测试、部署、运维、监控、运营），而不仅仅是提高开发阶段的效率。</p>
+
+    <p><strong>精益创业（Lean Startup）</strong>帮助组织分析并建立最小可实行产品（MinimumViableProduct），通过迭代持续改进敏捷方法帮助组织消除浪费，通过反馈不断找到正确的方向。</p>
+
+    <p><strong>持续交付</strong>则帮助组织构建更快、更可靠、可频繁发布的交付机制并构建产品交付闭环。</p>
+
+    <p>大部分组织已经基本上形成了一套可实施的交付体系。包括持续集成、自动化测试、数据管理、自动化部署机制等。</p>
+
+    <p>这时候，大泥球式的单块架构，会逐渐成为影响交付周期进一步优化的瓶颈，因此如何找到灵活性高、扩展性好的架构方式，也成为进一步优化交付周期面临的挑战。</p>
+  </li>
+  <li>
+    <p><strong>Docker等容器虚拟化技术的快速发展</strong></p>
+
+    <p>同传统的虚拟化技术相比，基于容器技术的Docker，不需要复杂的Hypervisor机制支持，具有更高的虚拟化性能和效率。</p>
+
+    <p>同时容器可以很容易的运行在任意的装有DockerEngine的系统上，使得开发人员能够用更低的成本将应用程序部署在不同平台上。</p>
+  </li>
+  <li>
+    <p><strong>DevOps文化</strong></p>
+
+    <p>DevOps文化的推行打破了传统开发与运维之间的壁垒，帮助组织形成开发、运维紧密配合的、全功能化的高效团队，并尽早降低软件交付最后一公里的风险。</p>
+  </li>
+</ol>
+
+<h2 id="遗留系统的微服务改造策略">遗留系统的微服务改造策略</h2>
+<p>聊完什么是微服务架构以及其诞生背景，接下来我们来谈谈如何改造遗留系统。</p>
+
+<p>在过去的10多年间，大部分工作时间我都在和遗留系统打交道。我相信很多朋友也是工作在已经运转多年的遗留系统上。</p>
+
+<p>对于这类系统，当谈论使用微服务对其进行改造时，我认为要谨记一点：</p>
+
+<p><strong>改造不是重做。</strong></p>
+
+<p><strong>在改造的过程中，要始终以保证系统为用户提供的业务价值可用作为首要目标。</strong>从这个点出发，基于我的经验，对微服务改造的策略总结为如下五个步骤：</p>
+
+<p><img src="/assets/images/microservice_reform_strategy.jpeg" alt="" /></p>
+
+<ol>
+  <li>
+    <p>范围定义</p>
+
+    <p>对于遗留系统而言，通常业务运转时间较长（譬如5~8年以上，甚至更长），因此涉及的功能繁杂，代码中存在大量无效或者过时的需求，缺陷修复成本较高。</p>
+
+    <p>另外，系统在演进的过程中，也会持续为用户提供新的功能和价值。因此，划分出清晰的范围非常重要。</p>
+
+    <p>实际上，范围定义主要包括两部分：</p>
+
+    <ol>
+      <li>
+        <p>明确业务改造范围</p>
+
+        <p>所谓改造范围，就是确定我们常说的业务试点。通常，作为初次尝试微服务实践的组织，建议选取业务范围影响较小、非关键功能的试点，这样做也是为了确保在不影响核心业务的情况下快速尝试并获得反馈。</p>
+      </li>
+      <li>
+        <p>明确成员责任范围</p>
+
+        <p>明确成员责任范围，确定由谁来改造，确保改造的目标清晰。</p>
+
+        <p>实际上，对于产品而言，遗留系统的维护和更新，包括缺陷定位、缺陷修复、数据更新、功能实现、测试、交付给运维团队等，通常已经让团队的工作处于高负荷状态。因此，需要确定成员，全身心的投入，以微服务改造作为短期目标。</p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>功能剥离</p>
+
+    <p>有了明确的业务范围，成员也有了清晰的责任，接下来就需要将部分功能点进行剥离。</p>
+
+    <p>所谓剥离，就是将选中的功能从原有的系统中拆分出来，并构建成独立的服务。在这个阶段，主要包括两点：</p>
+
+    <ol>
+      <li>
+        <p>将功能从原有系统拆分出来，并构建新服务</p>
+
+        <p>一提到拆分，很多朋友会纠结，“系统复杂，如何拆分微服务才好？怎么样的拆分才合理？”。其实，从我个人的观点来看，这时候还不是纠结服务到底怎么划分合理的时候。为什么？</p>
+
+        <ol>
+          <li>
+            <p>好的架构是动态演变和迭代出来的，业务在不断改变，技术和工具也在不会的升级换代，没有完美的架构，只有无限逼近完美的动态平衡，所以先小范围、低成本动起来，在运转中找平衡点。</p>
+          </li>
+          <li>
+            <p>微服务的复杂度在于分布式系统本身，以及其生态系统（开发、测试、部署、运维、监控、告警）的搭建。</p>
+          </li>
+          <li>
+            <p>团队文化的形成是一个相对漫长的过程，如果花很大力气关注服务怎么拆，而没有聚焦在生态系统的搭建以及团队文化的形成上，实际上是舍本逐末。即便拆分出了不同的服务，在落地的时候也会遇到诸多问题。所以，找一个功能点先拆，然后搭建持续交付流水线，快速试错，建立好有效的反馈闭环机制，再不断寻找动态平衡，拆分出更细的服务或者将不合理的服务合并。</p>
+          </li>
+        </ol>
+      </li>
+      <li>
+        <p>在原有的系统前端，使用代理机制，并使用遗留系统和新服务组合为用户提供价值</p>
+
+        <p>这一步，目的是使用组合的系统（遗留系统+新的服务）为用户提供价值。</p>
+
+        <p>对于Web系统，通常可以在前端使用直接请求新的服务。也可以在后端使用转发请求，获取新服务提供的数据。</p>
+
+        <p>如下图所示：</p>
+
+        <p><img src="/assets/images/microservice_reform_strategy.jpeg" alt="" /></p>
+      </li>
+    </ol>
+  </li>
+  <li>
+    <p>数据解耦</p>
+
+    <p>在以前的遗留系统构建过程中，通常使用数据库作为集成点，不同功能/系统之间通过数据库完成数据交换。对于某些系统，还大量使用存储过程完成业务逻辑，开发的时候看似效率高，但几年下来，DBA成了IT团队最懂业务的人，维护成为瓶颈。</p>
+
+    <p>而实际上，业务的数据是业务固有的组成部分，应当随着业务的变化而变化。业务拆分出来，数据也应该拆分出来。从而保证访问数据只能通过统一的相关业务API完成。便于在将来的业务和架构演进中，有效的对数据维护、管理和升级。</p>
+  </li>
+  <li>
+    <p>数据同步</p>
+
+    <p>数据同步，是一个价值体现的过渡过程。</p>
+
+    <p>一方面，遗留系统的改造中存在的各种各样的挑战和我们今天认为的不合理（当时的场景也许是合理的）。另一方面，对于大部分遗留的系统，都会使用数据库作为集成点（开发成本低），导致某业务功能的数据与其他功能有着千丝万缕的联系，数据的变化容易对其他功能造成影响。</p>
+
+    <p>因此对于大型的遗留系统，很难在短期的时间内（3~6个月）完成全系统的改造。需要一个相对漫长，循序渐进的过程来完成改造。</p>
+
+    <p>譬如，在电商系统中，商家的后台管理系统中的产品、价格的更新，会发布到面向用户的电商搜索系统中以及其他系统中。如果我们将系统中的产品相关拆分成独立服务，则必须也要拆分数据发布机制，否则的话容易造成数据不一致。但拆分数据发布机制，又需要分析清楚不同数据之间的影响和依赖，需要更大的成本，短期内不易完成。</p>
+
+    <p>这时候，如果将新服务的数据同步回原有的数据库，采用这样一个折中的的过程，既能保障新的服务和数据被独立，又不影响原有的遗留系统功能。</p>
+
+    <p>说白了，这其实也是在保证系统为用户提供的业务价值不被破坏。</p>
+
+    <p>有了之前的尝试，接下来就是通过不断的迭代，完成功能剥离，数据解耦、数据同步，从而将更多的功能拆分成独立的服务。</p>
+  </li>
+</ol>
+
+<p><img src="/assets/images/legacy_system_reform_strategy.jpeg" alt="" /></p>
+
+<p>如上就是我对于遗留系统改造的策略。</p>
+
+<h2 id="遗留系统改造实践">遗留系统改造实践</h2>
+<p>接下来，我和大家分享一个我所经历的遗留系统改造的案例。首先，让我们看看这个系统的背景和一些数据。</p>
+
+<h3 id="客户背景">客户背景</h3>
+
+<p><a href="http://movit-tech.com/">盟拓软件</a>是中国房地产行业IT服务及行业解决方案和产品的领先厂家，其依据市场变化推出全民卖房的新营销模式，正从线下的传统现场售楼模式向线上的房地产电商模式进行转变。</p>
+
+<h3 id="业务痛点">业务痛点</h3>
+
+<p>当今房地产行业呈现短期开盘峰值、后期零星散客的业务特性。其面临着高昂线下运营成本，营销成本占销售额&gt;5%。而由此引入的线上竞价秒杀营销模式，传统IT解决方案的系统资源率、峰值扩容能力将无法满足。</p>
+
+<p><img src="/assets/images/case_mengtuo_traditional_mode.png" alt="" /></p>
+
+<h3 id="系统概览">系统概览</h3>
+
+<p>系统为典型的三层单块架构，使用MySQL数据库存储数据。运行在服务器上的应用处理性能较低，为了应对短暂的访问高峰，额外购置了较多的服务器资源，访问高峰过后，服务器资源闲置造成较大浪费，且需要较多人员维护。</p>
+
+<h3 id="相关数据">相关数据</h3>
+
+<ul>
+  <li>
+    <p>代码约<strong>100万</strong>行，测试覆盖率为<strong>10%</strong>，集成测试时间为<strong>一个月</strong></p>
+
+    <p>代码臃肿，无效遗留代码较多，且业务间紧耦合，测试覆盖率较低，测试出问题了难以定位，导致测试耗时较长。</p>
+  </li>
+  <li>
+    <p>营销预案需<strong>提前1个月</strong>准备资源</p>
+
+    <p>为应对访问高峰，每次都需要预购大量的服务资源，重新部署环境，并运行相关测试。</p>
+  </li>
+  <li>
+    <p>业务耦合紧，新业务上线<strong>&gt;半年</strong></p>
+
+    <p>每次测试都要多个业务团队联合测试，问题定位较耗时，测试效率低。</p>
+  </li>
+  <li>
+    <p>上百种业务，2-3种开发语言</p>
+
+    <p>业务复杂，且语言不一，系统联调时耗时较多且需相互配合，时间周期较长。</p>
+  </li>
+  <li>
+    <p>运维团队<strong>&gt;20人</strong></p>
+
+    <p>臃肿的团队导致问题定位需多方配合，沟通成本高。</p>
+  </li>
+</ul>
+
+<p><strong>基于之前定义的改造策略，我们的改造过程大致如下所示：</strong></p>
+
+<p>范围定义：</p>
+
+<ul>
+  <li>
+    <p>将原房地产CRM平台按业务类别拆分为多个微服务。</p>
+
+    <p><img src="/assets/images/case_mengtuo_reform_before_and_after.png" alt="" /></p>
+  </li>
+</ul>
+
+<p>功能剥离：</p>
+
+<ul>
+  <li>从单体CRM系统中逐步拆分出业务模块（服务网关、客户服务、房源服务、机会服务、积分服务）。</li>
+</ul>
+
+<p>数据解耦</p>
+
+<ul>
+  <li>每个微服务的数据进行独立存储。</li>
+</ul>
+
+<p>数据同步</p>
+
+<ul>
+  <li>在负载较低时，将数据同步回原有的遗留系统中不断迭代，陆续完成后续的服务。</li>
+</ul>
+
+<p>改造过程中，基于ServiceComb，<strong>通过控制请求路由，逐步架空对原单体应用的请求， 平滑过渡系统到微服务架构。</strong></p>
+
+<p><strong>单个服务的构建并没有那么复杂，基于ServiceComb，通过如下的简单4步，即可快速完成改造：</strong></p>
+
+<ol>
+  <li>引入<a href="https://github.com/apache/incubator-servicecomb-java-chassis">ServiceComb Java Chassis</a>框架依赖</li>
+  <li>定义服务接口端点</li>
+  <li>添加服务配置文件</li>
+  <li>注释服务启动入口</li>
+</ol>
+
+<p>另外，通过Company Workshop中提供的Docker插件配置，10分钟内完成了服务容器化，自动生成镜像。</p>
+
+<p>同时，利用ServiceComb开发的微服务应用，可同时无缝接入<a href="https://www.huaweicloud.com/product/servicestage.html">ServiceStage</a>，享受到微服务治理、容器虚机混编、应用拓扑等能力。</p>
+
+<p>为应对短暂的业务高峰，经常需要预购大量的资源来提前部署和验证环境，花费大量的人力物力，且资源利用率极低。因此，进行云化改造后的产品和解决方案需要具备随着参与人数增加而秒级伸缩，支撑业务峰值和资源利用率的能力。盟拓软件基于华为ServiceStage的核心技术容器改造、混编方案、编排调度算法等进行容器虚机混编应用云化改造，实现了应用的秒级部署和弹性伸缩能力，极大地提高了资源的利用率。</p>
+
+<p><strong>改造后效果：</strong></p>
+
+<ul>
+  <li>运维人力<strong>减少80%</strong></li>
+  <li>资源利用率<strong>提升50%</strong>，大幅降低运营成本</li>
+  <li><strong>每秒万级</strong>调用链分析能力</li>
+  <li>传统系统和应用平滑改造上云</li>
+  <li>互联网营销模式，天粒度业务快速创新</li>
+</ul>
+
+<p><img src="/assets/images/case_mengtuo_new_mode.png" alt="" /></p>
+
+<p><strong>理论上，经过不断地迭代，逐渐完成业务功能解耦，新服务构建。那么遗留系统就会被替换掉。</strong></p>
+
+<h2 id="改造要点">改造要点</h2>
+<p>在改造的整个过程中，我认为如下几个实践是非常重要的：</p>
+
+<p><img src="/assets/images/best_practices_for_legacy_system_reform.jpeg" alt="" /></p>
+
+<h3 id="基础设施自动化">基础设施自动化</h3>
+<p>原有的部署发生在数据中心，因此流程上相对复杂，而且存在一定弊端（譬如审批和协作上，起不到实质作用）。对于改造后的服务而言，我们使用更多的自动化方式代替复杂的审批流程。通过使用华为ServiceStage作为基础设施，团队能够更自主的对基础设施进行管理。如资源创建、销毁、更新等。随着服务的增多，基础设施自动化帮助我们节省了大量的时间。当然，从组织层面，也成立了专门的小组研究华为ServiceStage以及相关的DevOps配套工具。</p>
+
+<p>目前，国内外有很多优秀的云平台，可以方便的为用户提供基础设施的自动化机制。</p>
+
+<h3 id="微服务生态系统">微服务生态系统</h3>
+<p>微服务的生态系统是指微服务实施过程相关的协作部分，涉及部分较多，譬如测试机制、持续集成、自动化部署、细粒度监控、日志聚合、告警、持续交付，以及大家非常关注的服务注册、服务发现机制等。</p>
+
+<p>这部分的灵活性比较大，因为目前如上说的每一个领域都有很多优秀的工具。譬如日志聚合目前业界的方案通常为ELK，监控的方案如Zabbix、NewRelic、CloudWatch等，成熟的监控工具都具有告警功能，PagerDuty也提供更专业的告警服务。服务注册和发现有ServiceComb框架的Service Center，Eureka，Consul，Zookeeper。大家可以在各自的团队中自由发挥。</p>
+
+<h3 id="开发框架的演进">开发框架的演进</h3>
+<p>开发框架是团队在构建微服务的过程中，不断总结，梳理出的快速开发微服务的相关工具和框架。</p>
+
+<p>我们基于ServiceComb构建了快速开发框架，主要包括四部分，如下图所示：</p>
+
+<p><img src="/assets/images/rapid_development_framework.png" alt="" /></p>
+
+<ol>
+  <li>
+    <p>微服务工程示例</p>
+
+    <p>提供微服务改造架构最佳实践参考工程Company，使能微服务改造或开发能复用其架构设计和配置，同时指导实现服务容器化和后续服务性能测试等提高服务可靠性。</p>
+  </li>
+  <li>
+    <p>契约生成工具</p>
+
+    <p>ServiceComb采用了基于OpenAPI的服务契约，使业务逻辑与编程语言解耦，并可使用Swagger工具定义服务契约，自动生成契约对应的代码和文档。</p>
+  </li>
+  <li>
+    <p>持续集成</p>
+
+    <p>持续集成使用了Jenkins，通过其配置文件定义主要的阶段：</p>
+
+    <blockquote>
+      <p>验证：运行单元测试，集成测试</p>
+
+      <p>构建：构建可执行的jar部署包</p>
+
+      <p>部署：基于指定版本制作镜像，并推送到测试或生产环境下</p>
+    </blockquote>
+
+    <p>利用这样的持续集成模板工程，花费很少的时间，就可以针对新建的微服务应用，快速配置其对应的持续集成环境。</p>
+  </li>
+  <li>
+    <p>Kubernetes集群一键部署</p>
+
+    <p>Kubernetes是谷歌开源的一个容器集群管理工具。基于Kubernetes，可实现微服务的快速部署及弹性伸缩。我们提供了一键部署脚本，部署时只需稍作修改即可通过一条命令，自动完成资源的创建、部署、弹性伸缩、金丝雀发布等。</p>
+  </li>
+</ol>
+
+<h3 id="团队运维自管理">团队运维自管理</h3>
+
+<p>这一部分是关于团队的文化管理。也是对DevOPS的延伸，我们称为TMI（Team Managed Infrastructure）。</p>
+
+<p>目的是将分析、开发、测试以及资源创建、销毁、自动化部署的权利交给团队，由团队按需完成部署（加上看板的流程管理，而非Scrum的固定迭代，可以做到一天部署多次）。</p>
+
+<p>当然，这个环节非常依赖于成熟的监控以及告警机制，当出现问题时，能够有效的通知到责任人，快速反馈，快速修复。团队内部也会定期轮换Pager（出问题救火的人），培养团队以服务可用作为大家的共同目标，培养产品观念，而非项目观念。</p>
+
+<p>再回顾一下这个图：</p>
+
+<p><img src="/assets/images/best_practices_for_legacy_system_reform.jpeg" alt="" /></p>
+
+<p>最后，和大家分享一下，我个人在微服务实施过程中总结的4句方针:</p>
+
+<p><strong>由大到小，由粗到细</strong></p>
+
+<p><strong>关注运维，关注监控</strong></p>
+
+<p><strong>快速反馈，快速修复</strong></p>
+
+<p><strong>循序渐进，增量实现</strong></p>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
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+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> Updated:</strong> <time datetime="2017-10-23">October 23, 2017</time></p>
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+    <meta itemprop="headline" content="Howto Upgrade to Zipkin2">
+    <meta itemprop="description" content="Changes between v1 and v2 of zipkin and how Java Chassis upgraded to zipkin2">
+    <meta itemprop="datePublished" content="January 10, 2018">
+    <meta itemprop="dateModified" content="January 11, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Howto Upgrade to Zipkin2
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="background">Background</h2>
+
+<p>Java Chassis uses zipkin as the default tracing implementation.</p>
+
+<p>Zipkin introduced <a href="http://zipkin.io/zipkin-api/#/">v2 http api</a> in version 1.31 which simplifies data types. There are also various other improvements and new features added to the zipkin libraries, so it seems a good time for us to follow the upstream and upgrade to zipkin2.</p>
+
+<h3 id="version-matrix">Version matrix</h3>
+
+<table>
+  <thead>
+    <tr>
+      <th>module</th>
+      <th>current</th>
+      <th>target</th>
+      <th>supports v2 since</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>zipkin</td>
+      <td>1.24.0</td>
+      <td>2.4.2</td>
+      <td>2.0.0</td>
+    </tr>
+    <tr>
+      <td>brave</td>
+      <td>4.13.1</td>
+      <td>4.13.1</td>
+      <td>4.7.1</td>
+    </tr>
+    <tr>
+      <td>reporter</td>
+      <td>0.10.0</td>
+      <td>2.2.2</td>
+      <td>2.0.0</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="whats-changed">What’s changed</h2>
+
+<p>Zipkin did a very good job on maintaining backward compatibility. All the changes that breaks compatiblity are packaged into a new group(<code class="highlighter-rouge">io.zipkin.java</code> -&gt; <code class="highlighter-rouge">io.zipkin.zipkin2</code>, <code class="highlighter-rouge">io.zipkin.reporter</code> -&gt; <code class="highlighter-rouge">io.zipkin.reporter2</code>). And v1/v2 libraries can coexist.</p>
+
+<p>The zipkin2 library can use both v1 and v2 api to communicate with server.</p>
+
+<p>The <code class="highlighter-rouge">zipkin2.Span</code> class changed a bit from the old <code class="highlighter-rouge">zipkin.Span</code> class. The public fields are refactored to methods. And the <code class="highlighter-rouge">BinaryAnnotation</code> class is removed along with <code class="highlighter-rouge">zipkin.Span.binaryAnnotaions</code> field. It’s functionality is replaced by <code class="highlighter-rouge">zipkin2.Span.tags()</code> method which return a <code class="highlighter-rouge">Map&lt;String,String&gt;</code>.</p>
+
+<h2 id="upgrade-to-zipkin2-for-java-chassis">Upgrade to zipkin2 for Java Chassis</h2>
+
+<h3 id="modify-the-maven-dependencies-to-use-the-target-version-of-related-libraries">Modify the maven dependencies to use the target version of related libraries.</h3>
+<p>Change the group <code class="highlighter-rouge">io.zipkin.java</code> and <code class="highlighter-rouge">io.zipkin.reporter</code> to <code class="highlighter-rouge">io.zipkin.zipkin2</code> and <code class="highlighter-rouge">io.zipkin.reporter2</code> respectively.</p>
+
+<div class="language-diff highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">java-chassis-dependencies/pom.xml
+@@ -50,8 +50,8 @@</span>
+     &lt;cxf.version&gt;3.1.6&lt;/cxf.version&gt;
+     &lt;logback.version&gt;1.1.7&lt;/logback.version&gt;
+     &lt;brave.version&gt;4.13.1&lt;/brave.version&gt;
+<span class="gd">-    &lt;zipkin.version&gt;1.24.0&lt;/zipkin.version&gt;
+-    &lt;zipkin-reporter.version&gt;0.10.0&lt;/zipkin-reporter.version&gt;
+</span><span class="gi">+    &lt;zipkin.version&gt;2.4.2&lt;/zipkin.version&gt;
++    &lt;zipkin-reporter.version&gt;2.2.2&lt;/zipkin-reporter.version&gt;
+</span>   &lt;/properties&gt;
+ 
+   &lt;dependencyManagement&gt;
+<span class="p">@@ -646,7 +646,7 @@</span>
+ 
+       &lt;!-- zipkin dependencies --&gt;
+       &lt;dependency&gt;
+<span class="gd">-        &lt;groupId&gt;io.zipkin.java&lt;/groupId&gt;
+</span><span class="gi">+        &lt;groupId&gt;io.zipkin.zipkin2&lt;/groupId&gt;
+</span>         &lt;artifactId&gt;zipkin&lt;/artifactId&gt;
+         &lt;version&gt;${zipkin.version}&lt;/version&gt;
+       &lt;/dependency&gt;
+<span class="p">@@ -661,7 +661,7 @@</span>
+         &lt;version&gt;${brave.version}&lt;/version&gt;
+       &lt;/dependency&gt;
+       &lt;dependency&gt;
+<span class="gd">-        &lt;groupId&gt;io.zipkin.reporter&lt;/groupId&gt;
+</span><span class="gi">+        &lt;groupId&gt;io.zipkin.reporter2&lt;/groupId&gt;
+</span>         &lt;artifactId&gt;zipkin-sender-okhttp3&lt;/artifactId&gt;
+         &lt;version&gt;${zipkin-reporter.version}&lt;/version&gt;
+       &lt;/dependency&gt;
+
+handlers/handler-tracing-zipkin/pom.xml
+<span class="p">@@ -50,7 +50,7 @@</span>
+       &lt;artifactId&gt;brave&lt;/artifactId&gt;
+     &lt;/dependency&gt;
+     &lt;dependency&gt;
+<span class="gd">-      &lt;groupId&gt;io.zipkin.reporter&lt;/groupId&gt;
+</span><span class="gi">+      &lt;groupId&gt;io.zipkin.reporter2&lt;/groupId&gt;
+</span>       &lt;artifactId&gt;zipkin-sender-okhttp3&lt;/artifactId&gt;
+     &lt;/dependency&gt;
+     &lt;dependency&gt;
+
+</code></pre></div></div>
+
+<h3 id="make-brave-to-use-zipkin2-instead-of-zipkin">Make brave to use zipkin2 instead of zipkin</h3>
+
+<p>Change the zipkin.xxx import to zipkin2.xxx on imports, and most importantly, use <code class="highlighter-rouge">spanReporter()</code> instead of <code class="highlighter-rouge">reporter()</code> for generating reporter for brave, change the api path to /api/v2/xxx when creating sender.</p>
+
+<div class="language-diff highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">handlers/handler-tracing-zipkin/src/main/java/org/apache/servicecomb/tracing/zipkin/TracingConfiguration.java
+@@ -31,11 +31,11 @@</span>
+ import brave.http.HttpTracing;
+ import brave.propagation.CurrentTraceContext;
+ import org.apache.servicecomb.config.DynamicProperties;
+<span class="gd">-import zipkin.Span;
+-import zipkin.reporter.AsyncReporter;
+-import zipkin.reporter.Reporter;
+-import zipkin.reporter.Sender;
+-import zipkin.reporter.okhttp3.OkHttpSender;
+</span><span class="gi">+import zipkin2.Span;
++import zipkin2.reporter.AsyncReporter;
++import zipkin2.reporter.Reporter;
++import zipkin2.reporter.Sender;
++import zipkin2.reporter.okhttp3.OkHttpSender;
+</span> 
+ @Configuration
+ class TracingConfiguration {
+<span class="p">@@ -56,14 +56,15 @@</span> Sender sender(DynamicProperties dynamicProperties) {
+     return AsyncReporter.builder(sender).build();
+   }
+ 
+<span class="gi">+
+</span>   @Bean
+   Tracing tracing(Reporter&lt;Span&gt; reporter, DynamicProperties dynamicProperties,
+       CurrentTraceContext currentTraceContext) {
+     return Tracing.newBuilder()
+         .localServiceName(dynamicProperties.getStringProperty(CONFIG_QUALIFIED_MICROSERVICE_NAME_KEY,
+             DEFAULT_MICROSERVICE_NAME))
+         .currentTraceContext(currentTraceContext) // puts trace IDs into logs
+<span class="gd">-        .reporter(reporter)
+</span><span class="gi">+        .spanReporter(reporter)
+</span>         .build();
+   }
+</code></pre></div></div>
+
+<p><strong>Note</strong>:</p>
+
+<p>In the <a href="https://github.com/openzipkin/brave/releases/tag/4.7.1">brave release notes</a>, it’s stated that we need to use <code class="highlighter-rouge">create()</code> instead of <code class="highlighter-rouge">builder()</code></p>
+
+<div class="language-diff highlighter-rouge"><div class="highlight"><pre class="highlight"><code>
+   /** Configuration for how to buffer spans into messages for Zipkin */
+<span class="gd">-  @Bean Reporter&lt;Span&gt; reporter() {
+-    return AsyncReporter.builder(sender()).build();
+</span><span class="gi">+  @Bean Reporter&lt;Span&gt; spanReporter() {
++    return AsyncReporter.create(sender()).build();
+</span>   }
+</code></pre></div></div>
+
+<p>But this will not work. In <code class="highlighter-rouge">zipkin2.Reporter</code>, the <code class="highlighter-rouge">create(sender)</code> is actually equivalent to <code class="highlighter-rouge">builder(sender).build()</code></p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="kd">public</span> <span class="kd">static</span> <span class="nc">AsyncReporter</span><span class="o">&lt;</span><span class="nc">Span</span><span class="o">&gt;</span> <span class="nf">create</span><span class="o">(</span><span class="nc">Sender</span> <span class="n">sender</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="o">(</span><span class="k">new</span> <span class="nc">AsyncReporter</span><span class="o">.</span><span class="na">Builder</span><span class="o">(</span><span class="n">sender</span><span class="o">)).</span><span class="na">build</span><span class="o">();</span>
+  <span class="o">}</span>
+  
+  <span class="kd">public</span> <span class="kd">static</span> <span class="nc">AsyncReporter</span><span class="o">.</span><span class="na">Builder</span> <span class="nf">builder</span><span class="o">(</span><span class="nc">Sender</span> <span class="n">sender</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">AsyncReporter</span><span class="o">.</span><span class="na">Builder</span><span class="o">(</span><span class="n">sender</span><span class="o">);</span>
+  <span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="make-changes-according-to-the-changes-of-zipkinspan-and-zipkin2span">Make changes according to the changes of zipkin.Span and zipkin2.Span.</h3>
+
+<p>We do not use zipkin.Span in our production code, but we do use it in our tests. Those changes are quite straight forward, we just change the accessing of fields to calling methods as described in the What’s Changed section.</p>
+
+<div class="language-diff highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">tracing/tracing-zipkin/src/test/java/org/apache/servicecomb/tracing/zipkin/ZipkinSpanAspectTest.java 
+@@ -45,7 +45,7 @@</span>
+ import org.apache.servicecomb.tracing.zipkin.app.ZipkinSpanTestApplication;
+ import org.apache.servicecomb.tracing.zipkin.app.ZipkinSpanTestApplication.CustomSpanTask;
+ import org.apache.servicecomb.tracing.zipkin.app.ZipkinSpanTestApplication.SomeSlowTask;
+<span class="gd">-import zipkin.Span;
+</span><span class="gi">+import zipkin2.Span;
+</span> 
+ @RunWith(SpringRunner.class)
+ @SpringBootTest(classes = {ZipkinSpanTestApplication.class, TracingConfig.class})
+<span class="p">@@ -74,8 +74,8 @@</span> public void reportedSpanContainsAnnotatedMethodInfo() throws Exception {
+ 
+     await().atMost(2, SECONDS).until(() -&gt; !spans.isEmpty());
+ 
+<span class="gd">-    zipkin.Span span = spans.poll();
+-    assertThat(span.name, is("crawl"));
+</span><span class="gi">+    zipkin2.Span span = spans.poll();
++    assertThat(span.name(), is("crawl"));
+</span>     assertThat(tracedValues(span), contains(SomeSlowTask.class.getMethod("crawl").toString()));
+   }
+   
+<span class="p">@@ -84,17 +84,17 @@</span> public void reportCustomSpanInfomation() throws Exception {
+     customSpanTask.invoke();
+     await().atMost(2, SECONDS).until(() -&gt; !spans.isEmpty());
+   
+<span class="gd">-    zipkin.Span span = spans.poll();
+-    assertThat(span.name, is("transaction1"));
+</span><span class="gi">+    zipkin2.Span span = spans.poll();
++    assertThat(span.name(), is("transaction1"));
+</span>     assertThat(tracedValues(span), contains("startA"));
+     
+   }
+ 
+<span class="gd">-  private List&lt;String&gt; tracedValues(zipkin.Span spans) {
+-    return spans.binaryAnnotations.stream()
+-        .filter(span -&gt; CALL_PATH.equals(span.key) || "error".equals(span.key))
+-        .filter(span -&gt; span.value != null)
+-        .map(annotation -&gt; new String(annotation.value))
+</span><span class="gi">+  private List&lt;String&gt; tracedValues(zipkin2.Span spans) {
++    return spans.tags().entrySet().stream()
++        .filter(span -&gt; CALL_PATH.equals(span.getKey()) || "error".equals(span.getKey()))
++        .filter(span -&gt; span.getValue() != null)
++        .map(annotation -&gt; new String(annotation.getValue()))
+</span>         .distinct()
+         .collect(Collectors.toList());
+   }
+<span class="p">@@ -110,7 +110,7 @@</span> public void reportCustomSpanInfomation() throws Exception {
+     Tracing tracing(Queue&lt;Span&gt; spans) {
+       return Tracing.newBuilder()
+           .currentTraceContext(new StrictCurrentTraceContext())
+<span class="gd">-          .reporter(spans::add)
+</span><span class="gi">+          .spanReporter(spans::add)
+</span>           .build();
+     }
+   }
+</code></pre></div></div>
+
+<h3 id="support-both-v1-and-v2-api-of-zipkin-server">Support both v1 and v2 api of zipkin server.</h3>
+
+<p>Our customers may be still running a zipkin server prior to 1.31 which does not support the v2 http api. So we added an option to let them specify the server api version.</p>
+
+<p>Supporting v1 api is built into zipkin2, so we do not need to rely on the v1 libraries. Just use the <code class="highlighter-rouge">SpanBytesEncoder.JSON_V1</code> when building reporter and change the sender api path.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">sender</span> <span class="o">=</span> <span class="nc">URLConnectionSender</span><span class="o">.</span><span class="na">create</span><span class="o">(</span><span class="s">"http://localhost:9411/api/v1/spans"</span><span class="o">)</span>
+<span class="n">reporter</span> <span class="o">=</span> <span class="nc">AsyncReporter</span><span class="o">.</span><span class="na">builder</span><span class="o">(</span><span class="n">sender</span><span class="o">)</span>
+                        <span class="o">.</span><span class="na">build</span><span class="o">(</span><span class="nc">SpanBytesEncoder</span><span class="o">.</span><span class="na">JSON_V1</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p>That’s all, for the complete changes, please refer the <a href="https://github.com/apache/incubator-servicecomb-java-chassis/pull/488">pull request</a> for the complete changes.</p>
+
+<h2 id="references">References</h2>
+
+<ul>
+  <li><a href="https://github.com/openzipkin/zipkin/releases/tag/2.0.0">Zipkin 2.0.0 release notes</a></li>
+  <li><a href="https://github.com/openzipkin/brave/releases/tag/4.7.1">Brave 4.7.1 release notes</a></li>
+  <li><a href="https://github.com/openzipkin/brave/tree/master/brave">Brave API V4</a></li>
+</ul>
+
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content/docs/kie/0.1.0/.buildinfo

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new file mode 100644
index 0000000..c78b181
--- /dev/null
+++ b/content/docs/kie/0.1.0/.buildinfo
@@ -0,0 +1,4 @@
+# Sphinx build info version 1
+# This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
+config: e43b310873fd2cce0d9b3236361c3ab9
+tags: 645f666f9bcd5a90fca523b33c5a78b7

content/docs/kie/0.1.0/README.html

diff --git a/content/docs/kie/0.1.0/README.html b/content/docs/kie/0.1.0/README.html
new file mode 100644
index 0000000..1962ff2
--- /dev/null
+++ b/content/docs/kie/0.1.0/README.html
@@ -0,0 +1,224 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+           <div itemprop="articleBody">
+            
+  <div class="section" id="how-to-write-doc-in-local">
+<h1>How to write doc in local<a class="headerlink" href="#how-to-write-doc-in-local" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="prepare">
+<h2>Prepare<a class="headerlink" href="#prepare" title="Permalink to this headline">¶</a></h2>
+<ol class="simple">
+<li><p>Install Python 3.X with zlib, libssl-dev(openssl-devel)</p></li>
+<li><p>Install pip3</p></li>
+<li><p>Install sphinx(&gt;=2.0.0) support https://docs.readthedocs.io/en/latest/getting_started.html</p></li>
+<li><p>Install RTD module &amp; recommonmark</p></li>
+</ol>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>sudo pip install sphinx_rtd_theme
+sudo pip install recommonmark
+</pre></div>
+</div>
+</div>
+<div class="section" id="generate-doc">
+<h2>Generate doc<a class="headerlink" href="#generate-doc" title="Permalink to this headline">¶</a></h2>
+<p>In windows</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span><span class="nb">cd</span> docs
+make.bat html
+</pre></div>
+</div>
+<p>In linux</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span><span class="nb">cd</span> docs
+make html
+</pre></div>
+</div>
+</div>
+<div class="section" id="check-the-result">
+<h2>Check the result<a class="headerlink" href="#check-the-result" title="Permalink to this headline">¶</a></h2>
+<ol class="simple">
+<li><p>See html pages in _build folder</p></li>
+</ol>
+</div>
+</div>
+
+
+           </div>
+           
+          </div>
+          <footer>
+  
+
+  <hr/>
+
+  <div role="contentinfo">
+    <p>
+        &copy; Copyright 2018, xiaoliang
+
+    </p>
+  </div>
+  Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. 
+
+</footer>
+
+        </div>
+      </div>
+
+    </section>
+
+  </div>
+  
+
+
+  <script type="text/javascript">
+      jQuery(function () {
+          SphinxRtdTheme.Navigation.enable(true);
+      });
+  </script>
+
+  
+  
+    
+   
+
+</body>
+</html>
\ No newline at end of file

content/docs/kie/0.1.0/_sources/README.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/README.md.txt b/content/docs/kie/0.1.0/_sources/README.md.txt
new file mode 100644
index 0000000..1685bc7
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/README.md.txt
@@ -0,0 +1,30 @@
+# How to write doc in local
+
+## Prepare
+1. Install Python 3.X with zlib, libssl-dev(openssl-devel)
+1. Install pip3
+1. Install sphinx(>=2.0.0) support https://docs.readthedocs.io/en/latest/getting_started.html
+1. Install RTD module & recommonmark
+```shell
+sudo pip install sphinx_rtd_theme
+sudo pip install recommonmark
+```
+
+## Generate doc
+
+In windows
+```shell
+cd docs
+make.bat html
+```
+
+In linux
+```shell
+cd docs
+make html
+```
+
+## Check the result
+
+1. See html pages in _build folder
+

content/docs/kie/0.1.0/_sources/configuration.rst.txt

diff --git a/content/docs/kie/0.1.0/_sources/configuration.rst.txt b/content/docs/kie/0.1.0/_sources/configuration.rst.txt
new file mode 100644
index 0000000..1dea3e9
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/configuration.rst.txt
@@ -0,0 +1,9 @@
+User guides
+=========================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   configurations/storage
+   configurations/registry

content/docs/kie/0.1.0/_sources/configurations/registry.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/configurations/registry.md.txt b/content/docs/kie/0.1.0/_sources/configurations/registry.md.txt
new file mode 100644
index 0000000..7795515
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/configurations/registry.md.txt
@@ -0,0 +1,26 @@
+# Registry
+kie server is able to register to a registry, so that other client is able to discover it registry service.
+by default registry feature is disabled.
+```yaml
+cse:
+  service:
+    registry:
+      disabled: true
+...
+```
+For example, kie is able to register to ServiceComb service center.
+
+
+### Options
+the function is powered by go-chassis in chassis.yaml file 
+refer to https://docs.go-chassis.com/user-guides/registry.html
+
+### Example 
+Register to ServiceComb service center
+```yaml
+cse:
+  service:
+    registry:
+      address: http://127.0.0.1:30100
+...
+```
\ No newline at end of file

content/docs/kie/0.1.0/_sources/configurations/storage.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/configurations/storage.md.txt b/content/docs/kie/0.1.0/_sources/configurations/storage.md.txt
new file mode 100644
index 0000000..1828410
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/configurations/storage.md.txt
@@ -0,0 +1,30 @@
+# Storage 
+you can use mongo db as kie server storage to save configuration
+
+### Options
+**uri**
+>*(required, string)* db uri
+
+
+**timeout**
+>*(optional, string)* db operation timeout 
+
+
+**sslEnabled**
+>*(optional, bool)*  enable TLS communication to mongodb server
+
+**rootCAFile**
+>*(optional, bool)*  if sslEnabled is true, you must give a ca file
+
+
+### Example
+```yaml
+db:
+  uri: mongodb://kie:123@127.0.0.1:27017
+  poolSize: 10
+  timeout:  5m
+  sslEnabled: true
+  rootCAFile: /opt/kie/ca.crt
+```
+
+

content/docs/kie/0.1.0/_sources/development-guide.rst.txt

diff --git a/content/docs/kie/0.1.0/_sources/development-guide.rst.txt b/content/docs/kie/0.1.0/_sources/development-guide.rst.txt
new file mode 100644
index 0000000..a94eb89
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/development-guide.rst.txt
@@ -0,0 +1,8 @@
+Development Guide
+======================================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   development-guide/build.md

content/docs/kie/0.1.0/_sources/development-guide/build.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/development-guide/build.md.txt b/content/docs/kie/0.1.0/_sources/development-guide/build.md.txt
new file mode 100644
index 0000000..2af29f6
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/development-guide/build.md.txt
@@ -0,0 +1,44 @@
+# Build
+
+Download and run mongodb, 
+see [MongoDB Community Edition Installation Tutorials](https://docs.mongodb.com/manual/installation/#mongodb-community-edition-installation-tutorials)
+
+Write a script to create a user 
+```shell script
+cat <<EOM > native_db.js
+db.createUser(
+    {
+        user: "root",
+        pwd: "root",
+        roles:[
+            {
+                role: "readWrite",
+                db:   "kie"
+            }
+        ]
+    }
+);
+EOM
+```
+
+Exec native_db.js
+```shell script bash
+mongo 127.0.0.1/kie native_db.js
+```
+
+Build serivcecomb-kie binary
+
+```shell script bash
+cd ${servicecomb_root_path}
+build/build_binary.sh
+```
+
+This will build 4 packages for 4 different platforms in ${servicecomb_root_path}/release/kie directory.
+Choose the right one and unzip and run it.
+For Example:
+```shell script bash
+cd ${servicecomb_root_path}/release/kie
+tar -xzvf apache-servicecomb-kie--${platform}-amd64.tar.gz
+cd apache-servicecomb-kie--${platform}-amd64
+./kie --config conf/kie-conf.yaml
+```
\ No newline at end of file

content/docs/kie/0.1.0/_sources/get-started.rst.txt

diff --git a/content/docs/kie/0.1.0/_sources/get-started.rst.txt b/content/docs/kie/0.1.0/_sources/get-started.rst.txt
new file mode 100644
index 0000000..9da963e
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/get-started.rst.txt
@@ -0,0 +1,8 @@
+Get started
+======================================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   getstarted/install.md

content/docs/kie/0.1.0/_sources/getstarted/install.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/getstarted/install.md.txt b/content/docs/kie/0.1.0/_sources/getstarted/install.md.txt
new file mode 100644
index 0000000..ca611dd
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/getstarted/install.md.txt
@@ -0,0 +1,121 @@
+# Quick start
+
+### With docker
+Run mongodb server
+
+write a script to create a user 
+```shell script
+cat <<EOM > db.js
+db.createUser(
+    {
+        user: "root",
+        pwd: "root",
+        roles:[
+            {
+                role: "readWrite",
+                db:   "kie"
+            }
+        ]
+    }
+);
+EOM
+```
+
+```shell script
+sudo docker run --name mongo -d \
+    -e "MONGO_INITDB_DATABASE=kie" \
+    -e "MONGO_INITDB_ROOT_USERNAME=root" \
+    -e "MONGO_INITDB_ROOT_PASSWORD=root" \
+    -p 27017:27017 \
+    -v ${PWD}/db.js:/docker-entrypoint-initdb.d/db.js:ro \
+    mongo:3.4
+```
+```shell script
+export MONGO_IP=`sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}' mongo`
+```
+Run kie server
+```shell script
+sudo docker run --name kie-server -d \
+    -e "MONGODB_ADDR=${MONGO_IP}:27017" \
+    -e "MONGODB_USER=root" \
+    -e "MONGODB_PWD=root" \
+    -p 30110:30110 \
+    servicecomb/kie
+```
+
+Put a key 
+```shell script
+curl -X PUT \
+  http://127.0.0.1:30110/v1/default/kie/kv/ingressRule.http \
+  -H 'Content-Type: application/json' \
+  -d '{
+	"value":"some rule",
+	"type": "yaml",
+	"labels":{"app":"default"}
+}'
+```
+
+response is 
+```json
+{
+    "_id": "5d6f27c5a1b287c5074e4538",
+    "label_id": "5d6f27c5a1b287c5074e4537",
+    "key": "ingressRule.http",
+    "value": "rule",
+    "value_type": "text",
+    "labels": {
+        "app": "default"
+    },
+    "revision": 1
+}
+```
+
+### Run locally with Docker compose
+
+```bash
+git clone git@github.com:apache/servicecomb-kie.git
+cd servicecomb-kie/deployments/docker
+sudo docker-compose up
+```
+it will launch 3 components 
+- mongodb: 127.0.0.1:27017
+- mongodb UI:http://127.0.0.1:8081
+- servicecomb-kie: http://127.0.0.1:30110
+
+
+### Run locally without Docker
+
+Download and run mongodb, 
+see [MongoDB Community Edition Installation Tutorials](https://docs.mongodb.com/manual/installation/#mongodb-community-edition-installation-tutorials)
+
+Write a script to create a user 
+```shell script
+cat <<EOM > native_db.js
+db.createUser(
+    {
+        user: "root",
+        pwd: "root",
+        roles:[
+            {
+                role: "readWrite",
+                db:   "kie"
+            }
+        ]
+    }
+);
+EOM
+```
+
+Exec native_db.js
+```shell script bash
+mongo 127.0.0.1/kie native_db.js
+```
+
+Download the binary of kie, see https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/
+Unzip  and Run it.
+For Example:
+```shell script bash
+tar -xzvf apache-servicecomb-kie--${platform}-amd64.tar.gz
+cd apache-servicecomb-kie--${platform}-amd64
+./kie --config conf/kie-conf.yaml
+```
\ No newline at end of file

content/docs/kie/0.1.0/_sources/index.rst.txt

diff --git a/content/docs/kie/0.1.0/_sources/index.rst.txt b/content/docs/kie/0.1.0/_sources/index.rst.txt
new file mode 100644
index 0000000..d54d95c
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/index.rst.txt
@@ -0,0 +1,19 @@
+.. documentation master file, created by
+   sphinx-quickstart on Fri Apr 13 17:13:49 2018.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to ServiceComb-kie's documentation!
+======================================
+.. toctree::
+   :maxdepth: 4
+   :caption: User Documentations
+   :glob:
+
+   intro
+   get-started
+   usage
+   configuration
+   development-guide
+
+

content/docs/kie/0.1.0/_sources/intro.rst.txt

diff --git a/content/docs/kie/0.1.0/_sources/intro.rst.txt b/content/docs/kie/0.1.0/_sources/intro.rst.txt
new file mode 100644
index 0000000..99a6cd0
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/intro.rst.txt
@@ -0,0 +1,10 @@
+Introductions
+======================================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   intro/what-is
+   intro/concepts
+

content/docs/kie/0.1.0/_sources/intro/concepts.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/intro/concepts.md.txt b/content/docs/kie/0.1.0/_sources/intro/concepts.md.txt
new file mode 100644
index 0000000..997cb1d
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/intro/concepts.md.txt
@@ -0,0 +1,27 @@
+# Concepts
+
+### Labels
+key value must belong to a identical label,
+a labels is equivalent to a map, it is represent as a json object
+```json
+{
+"app": "some_app",
+"service": "payment",
+"environment": "production",
+"version": "1.0.1"
+}
+```
+### key value
+A key is usually related to some function in your program, let's say a new web UI should enable or not.
+the labels is just like a map to tell you where this program located in. the map says, 
+it is located in production environment,the version is 1.0.1
+```json
+{
+	"value":"true",
+	"labels":{
+              "service": "web-console",
+              "environment": "production",
+              "version": "1.0.1"
+             }
+}
+```
\ No newline at end of file

content/docs/kie/0.1.0/_sources/intro/what-is.md.txt

diff --git a/content/docs/kie/0.1.0/_sources/intro/what-is.md.txt b/content/docs/kie/0.1.0/_sources/intro/what-is.md.txt
new file mode 100644
index 0000000..0385241
--- /dev/null
+++ b/content/docs/kie/0.1.0/_sources/intro/what-is.md.txt
@@ -0,0 +1,10 @@
+# What is ServiceComb kie
+
+ServiceComb kie is a config server which manage configurations in a distributed system.
+It is also a micro service in ServiceComb ecosystem and developed by [go-chassis](https://github.com/go-chassis/go-chassis)
+we call it ServiceComb Native application.
+
+# Why use ServiceComb kie
+Since it is a ServiceComb Native application, 
+the user of ServiceComb is able to integrate with it easily, 
+or even replace some implements of kie to develop a config server on-premise. 
\ No newline at end of file

content/docs/kie/0.1.0/_static/basic.css

diff --git a/content/docs/kie/0.1.0/_static/basic.css b/content/docs/kie/0.1.0/_static/basic.css
new file mode 100644
index 0000000..ea6972d
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/basic.css
@@ -0,0 +1,764 @@
+/*
+ * basic.css
+ * ~~~~~~~~~
+ *
+ * Sphinx stylesheet -- basic theme.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+/* -- main layout ----------------------------------------------------------- */
+
+div.clearer {
+    clear: both;
+}
+
+/* -- relbar ---------------------------------------------------------------- */
+
+div.related {
+    width: 100%;
+    font-size: 90%;
+}
+
+div.related h3 {
+    display: none;
+}
+
+div.related ul {
+    margin: 0;
+    padding: 0 0 0 10px;
+    list-style: none;
+}
+
+div.related li {
+    display: inline;
+}
+
+div.related li.right {
+    float: right;
+    margin-right: 5px;
+}
+
+/* -- sidebar --------------------------------------------------------------- */
+
+div.sphinxsidebarwrapper {
+    padding: 10px 5px 0 10px;
+}
+
+div.sphinxsidebar {
+    float: left;
+    width: 230px;
+    margin-left: -100%;
+    font-size: 90%;
+    word-wrap: break-word;
+    overflow-wrap : break-word;
+}
+
+div.sphinxsidebar ul {
+    list-style: none;
+}
+
+div.sphinxsidebar ul ul,
+div.sphinxsidebar ul.want-points {
+    margin-left: 20px;
+    list-style: square;
+}
+
+div.sphinxsidebar ul ul {
+    margin-top: 0;
+    margin-bottom: 0;
+}
+
+div.sphinxsidebar form {
+    margin-top: 10px;
+}
+
+div.sphinxsidebar input {
+    border: 1px solid #98dbcc;
+    font-family: sans-serif;
+    font-size: 1em;
+}
+
+div.sphinxsidebar #searchbox form.search {
+    overflow: hidden;
+}
+
+div.sphinxsidebar #searchbox input[type="text"] {
+    float: left;
+    width: 80%;
+    padding: 0.25em;
+    box-sizing: border-box;
+}
+
+div.sphinxsidebar #searchbox input[type="submit"] {
+    float: left;
+    width: 20%;
+    border-left: none;
+    padding: 0.25em;
+    box-sizing: border-box;
+}
+
+
+img {
+    border: 0;
+    max-width: 100%;
+}
+
+/* -- search page ----------------------------------------------------------- */
+
+ul.search {
+    margin: 10px 0 0 20px;
+    padding: 0;
+}
+
+ul.search li {
+    padding: 5px 0 5px 20px;
+    background-image: url(file.png);
+    background-repeat: no-repeat;
+    background-position: 0 7px;
+}
+
+ul.search li a {
+    font-weight: bold;
+}
+
+ul.search li div.context {
+    color: #888;
+    margin: 2px 0 0 30px;
+    text-align: left;
+}
+
+ul.keywordmatches li.goodmatch a {
+    font-weight: bold;
+}
+
+/* -- index page ------------------------------------------------------------ */
+
+table.contentstable {
+    width: 90%;
+    margin-left: auto;
+    margin-right: auto;
+}
+
+table.contentstable p.biglink {
+    line-height: 150%;
+}
+
+a.biglink {
+    font-size: 1.3em;
+}
+
+span.linkdescr {
+    font-style: italic;
+    padding-top: 5px;
+    font-size: 90%;
+}
+
+/* -- general index --------------------------------------------------------- */
+
+table.indextable {
+    width: 100%;
+}
+
+table.indextable td {
+    text-align: left;
+    vertical-align: top;
+}
+
+table.indextable ul {
+    margin-top: 0;
+    margin-bottom: 0;
+    list-style-type: none;
+}
+
+table.indextable > tbody > tr > td > ul {
+    padding-left: 0em;
+}
+
+table.indextable tr.pcap {
+    height: 10px;
+}
+
+table.indextable tr.cap {
+    margin-top: 10px;
+    background-color: #f2f2f2;
+}
+
+img.toggler {
+    margin-right: 3px;
+    margin-top: 3px;
+    cursor: pointer;
+}
+
+div.modindex-jumpbox {
+    border-top: 1px solid #ddd;
+    border-bottom: 1px solid #ddd;
+    margin: 1em 0 1em 0;
+    padding: 0.4em;
+}
+
+div.genindex-jumpbox {
+    border-top: 1px solid #ddd;
+    border-bottom: 1px solid #ddd;
+    margin: 1em 0 1em 0;
+    padding: 0.4em;
+}
+
+/* -- domain module index --------------------------------------------------- */
+
+table.modindextable td {
+    padding: 2px;
+    border-collapse: collapse;
+}
+
+/* -- general body styles --------------------------------------------------- */
+
+div.body {
+    min-width: 450px;
+    max-width: 800px;
+}
+
+div.body p, div.body dd, div.body li, div.body blockquote {
+    -moz-hyphens: auto;
+    -ms-hyphens: auto;
+    -webkit-hyphens: auto;
+    hyphens: auto;
+}
+
+a.headerlink {
+    visibility: hidden;
+}
+
+a.brackets:before,
+span.brackets > a:before{
+    content: "[";
+}
+
+a.brackets:after,
+span.brackets > a:after {
+    content: "]";
+}
+
+h1:hover > a.headerlink,
+h2:hover > a.headerlink,
+h3:hover > a.headerlink,
+h4:hover > a.headerlink,
+h5:hover > a.headerlink,
+h6:hover > a.headerlink,
+dt:hover > a.headerlink,
+caption:hover > a.headerlink,
+p.caption:hover > a.headerlink,
+div.code-block-caption:hover > a.headerlink {
+    visibility: visible;
+}
+
+div.body p.caption {
+    text-align: inherit;
+}
+
+div.body td {
+    text-align: left;
+}
+
+.first {
+    margin-top: 0 !important;
+}
+
+p.rubric {
+    margin-top: 30px;
+    font-weight: bold;
+}
+
+img.align-left, .figure.align-left, object.align-left {
+    clear: left;
+    float: left;
+    margin-right: 1em;
+}
+
+img.align-right, .figure.align-right, object.align-right {
+    clear: right;
+    float: right;
+    margin-left: 1em;
+}
+
+img.align-center, .figure.align-center, object.align-center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+img.align-default, .figure.align-default {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+.align-left {
+    text-align: left;
+}
+
+.align-center {
+    text-align: center;
+}
+
+.align-default {
+    text-align: center;
+}
+
+.align-right {
+    text-align: right;
+}
+
+/* -- sidebars -------------------------------------------------------------- */
+
+div.sidebar {
+    margin: 0 0 0.5em 1em;
+    border: 1px solid #ddb;
+    padding: 7px 7px 0 7px;
+    background-color: #ffe;
+    width: 40%;
+    float: right;
+}
+
+p.sidebar-title {
+    font-weight: bold;
+}
+
+/* -- topics ---------------------------------------------------------------- */
+
+div.topic {
+    border: 1px solid #ccc;
+    padding: 7px 7px 0 7px;
+    margin: 10px 0 10px 0;
+}
+
+p.topic-title {
+    font-size: 1.1em;
+    font-weight: bold;
+    margin-top: 10px;
+}
+
+/* -- admonitions ----------------------------------------------------------- */
+
+div.admonition {
+    margin-top: 10px;
+    margin-bottom: 10px;
+    padding: 7px;
+}
+
+div.admonition dt {
+    font-weight: bold;
+}
+
+div.admonition dl {
+    margin-bottom: 0;
+}
+
+p.admonition-title {
+    margin: 0px 10px 5px 0px;
+    font-weight: bold;
+}
+
+div.body p.centered {
+    text-align: center;
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content/docs/kie/0.1.0/_static/doctools.js

diff --git a/content/docs/kie/0.1.0/_static/doctools.js b/content/docs/kie/0.1.0/_static/doctools.js
new file mode 100644
index 0000000..b33f87f
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/doctools.js
@@ -0,0 +1,314 @@
+/*
+ * doctools.js
+ * ~~~~~~~~~~~
+ *
+ * Sphinx JavaScript utilities for all documentation.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+/**
+ * select a different prefix for underscore
+ */
+$u = _.noConflict();
+
+/**
+ * make the code below compatible with browsers without
+ * an installed firebug like debugger
+if (!window.console || !console.firebug) {
+  var names = ["log", "debug", "info", "warn", "error", "assert", "dir",
+    "dirxml", "group", "groupEnd", "time", "timeEnd", "count", "trace",
+    "profile", "profileEnd"];
+  window.console = {};
+  for (var i = 0; i < names.length; ++i)
+    window.console[names[i]] = function() {};
+}
+ */
+
+/**
+ * small helper function to urldecode strings
+ */
+jQuery.urldecode = function(x) {
+  return decodeURIComponent(x).replace(/\+/g, ' ');
+};
+
+/**
+ * small helper function to urlencode strings
+ */
+jQuery.urlencode = encodeURIComponent;
+
+/**
+ * This function returns the parsed url parameters of the
+ * current request. Multiple values per key are supported,
+ * it will always return arrays of strings for the value parts.
+ */
+jQuery.getQueryParameters = function(s) {
+  if (typeof s === 'undefined')
+    s = document.location.search;
+  var parts = s.substr(s.indexOf('?') + 1).split('&');
+  var result = {};
+  for (var i = 0; i < parts.length; i++) {
+    var tmp = parts[i].split('=', 2);
+    var key = jQuery.urldecode(tmp[0]);
+    var value = jQuery.urldecode(tmp[1]);
+    if (key in result)
+      result[key].push(value);
+    else
+      result[key] = [value];
+  }
+  return result;
+};
+
+/**
+ * highlight a given string on a jquery object by wrapping it in
+ * span elements with the given class name.
+ */
+jQuery.fn.highlightText = function(text, className) {
+  function highlight(node, addItems) {
+    if (node.nodeType === 3) {
+      var val = node.nodeValue;
+      var pos = val.toLowerCase().indexOf(text);
+      if (pos >= 0 &&
+          !jQuery(node.parentNode).hasClass(className) &&
+          !jQuery(node.parentNode).hasClass("nohighlight")) {
+        var span;
+        var isInSVG = jQuery(node).closest("body, svg, foreignObject").is("svg");
+        if (isInSVG) {
+          span = document.createElementNS("http://www.w3.org/2000/svg", "tspan");
+        } else {
+          span = document.createElement("span");
+          span.className = className;
+        }
+        span.appendChild(document.createTextNode(val.substr(pos, text.length)));
+        node.parentNode.insertBefore(span, node.parentNode.insertBefore(
+          document.createTextNode(val.substr(pos + text.length)),
+          node.nextSibling));
+        node.nodeValue = val.substr(0, pos);
+        if (isInSVG) {
+          var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
+          var bbox = node.parentElement.getBBox();
+          rect.x.baseVal.value = bbox.x;
+          rect.y.baseVal.value = bbox.y;
+          rect.width.baseVal.value = bbox.width;
+          rect.height.baseVal.value = bbox.height;
+          rect.setAttribute('class', className);
+          addItems.push({
+              "parent": node.parentNode,
+              "target": rect});
+        }
+      }
+    }
+    else if (!jQuery(node).is("button, select, textarea")) {
+      jQuery.each(node.childNodes, function() {
+        highlight(this, addItems);
+      });
+    }
+  }
+  var addItems = [];
+  var result = this.each(function() {
+    highlight(this, addItems);
+  });
+  for (var i = 0; i < addItems.length; ++i) {
+    jQuery(addItems[i].parent).before(addItems[i].target);
+  }
+  return result;
+};
+
+/*
+ * backward compatibility for jQuery.browser
+ * This will be supported until firefox bug is fixed.
+ */
+if (!jQuery.browser) {
+  jQuery.uaMatch = function(ua) {
+    ua = ua.toLowerCase();
+
+    var match = /(chrome)[ \/]([\w.]+)/.exec(ua) ||
+      /(webkit)[ \/]([\w.]+)/.exec(ua) ||
+      /(opera)(?:.*version|)[ \/]([\w.]+)/.exec(ua) ||
+      /(msie) ([\w.]+)/.exec(ua) ||
+      ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec(ua) ||
+      [];
+
+    return {
+      browser: match[ 1 ] || "",
+      version: match[ 2 ] || "0"
+    };
+  };
+  jQuery.browser = {};
+  jQuery.browser[jQuery.uaMatch(navigator.userAgent).browser] = true;
+}
+
+/**
+ * Small JavaScript module for the documentation.
+ */
+var Documentation = {
+
+  init : function() {
+    this.fixFirefoxAnchorBug();
+    this.highlightSearchWords();
+    this.initIndexTable();
+    if (DOCUMENTATION_OPTIONS.NAVIGATION_WITH_KEYS) {
+      this.initOnKeyListeners();
+    }
+  },
+
+  /**
+   * i18n support
+   */
+  TRANSLATIONS : {},
+  PLURAL_EXPR : function(n) { return n === 1 ? 0 : 1; },
+  LOCALE : 'unknown',
+
+  // gettext and ngettext don't access this so that the functions
+  // can safely bound to a different name (_ = Documentation.gettext)
+  gettext : function(string) {
+    var translated = Documentation.TRANSLATIONS[string];
+    if (typeof translated === 'undefined')
+      return string;
+    return (typeof translated === 'string') ? translated : translated[0];
+  },
+
+  ngettext : function(singular, plural, n) {
+    var translated = Documentation.TRANSLATIONS[singular];
+    if (typeof translated === 'undefined')
+      return (n == 1) ? singular : plural;
+    return translated[Documentation.PLURALEXPR(n)];
+  },
+
+  addTranslations : function(catalog) {
+    for (var key in catalog.messages)
+      this.TRANSLATIONS[key] = catalog.messages[key];
+    this.PLURAL_EXPR = new Function('n', 'return +(' + catalog.plural_expr + ')');
+    this.LOCALE = catalog.locale;
+  },
+
+  /**
+   * add context elements like header anchor links
+   */
+  addContextElements : function() {
+    $('div[id] > :header:first').each(function() {
+      $('<a class="headerlink">\u00B6</a>').
+      attr('href', '#' + this.id).
+      attr('title', _('Permalink to this headline')).
+      appendTo(this);
+    });
+    $('dt[id]').each(function() {
+      $('<a class="headerlink">\u00B6</a>').
+      attr('href', '#' + this.id).
+      attr('title', _('Permalink to this definition')).
+      appendTo(this);
+    });
+  },
+
+  /**
+   * workaround a firefox stupidity
+   * see: https://bugzilla.mozilla.org/show_bug.cgi?id=645075
+   */
+  fixFirefoxAnchorBug : function() {
+    if (document.location.hash && $.browser.mozilla)
+      window.setTimeout(function() {
+        document.location.href += '';
+      }, 10);
+  },
+
+  /**
+   * highlight the search words provided in the url in the text
+   */
+  highlightSearchWords : function() {
+    var params = $.getQueryParameters();
+    var terms = (params.highlight) ? params.highlight[0].split(/\s+/) : [];
+    if (terms.length) {
+      var body = $('div.body');
+      if (!body.length) {
+        body = $('body');
+      }
+      window.setTimeout(function() {
+        $.each(terms, function() {
+          body.highlightText(this.toLowerCase(), 'highlighted');
+        });
+      }, 10);
+      $('<p class="highlight-link"><a href="javascript:Documentation.' +
+        'hideSearchWords()">' + _('Hide Search Matches') + '</a></p>')
+          .appendTo($('#searchbox'));
+    }
+  },
+
+  /**
+   * init the domain index toggle buttons
+   */
+  initIndexTable : function() {
+    var togglers = $('img.toggler').click(function() {
+      var src = $(this).attr('src');
+      var idnum = $(this).attr('id').substr(7);
+      $('tr.cg-' + idnum).toggle();
+      if (src.substr(-9) === 'minus.png')
+        $(this).attr('src', src.substr(0, src.length-9) + 'plus.png');
+      else
+        $(this).attr('src', src.substr(0, src.length-8) + 'minus.png');
+    }).css('display', '');
+    if (DOCUMENTATION_OPTIONS.COLLAPSE_INDEX) {
+        togglers.click();
+    }
+  },
+
+  /**
+   * helper function to hide the search marks again
+   */
+  hideSearchWords : function() {
+    $('#searchbox .highlight-link').fadeOut(300);
+    $('span.highlighted').removeClass('highlighted');
+  },
+
+  /**
+   * make the url absolute
+   */
+  makeURL : function(relativeURL) {
+    return DOCUMENTATION_OPTIONS.URL_ROOT + '/' + relativeURL;
+  },
+
+  /**
+   * get the current relative url
+   */
+  getCurrentURL : function() {
+    var path = document.location.pathname;
+    var parts = path.split(/\//);
+    $.each(DOCUMENTATION_OPTIONS.URL_ROOT.split(/\//), function() {
+      if (this === '..')
+        parts.pop();
+    });
+    var url = parts.join('/');
+    return path.substring(url.lastIndexOf('/') + 1, path.length - 1);
+  },
+
+  initOnKeyListeners: function() {
+    $(document).keyup(function(event) {
+      var activeElementType = document.activeElement.tagName;
+      // don't navigate when in search box or textarea
+      if (activeElementType !== 'TEXTAREA' && activeElementType !== 'INPUT' && activeElementType !== 'SELECT') {
+        switch (event.keyCode) {
+          case 37: // left
+            var prevHref = $('link[rel="prev"]').prop('href');
+            if (prevHref) {
+              window.location.href = prevHref;
+              return false;
+            }
+          case 39: // right
+            var nextHref = $('link[rel="next"]').prop('href');
+            if (nextHref) {
+              window.location.href = nextHref;
+              return false;
+            }
+        }
+      }
+    });
+  }
+};
+
+// quick alias for translations
+_ = Documentation.gettext;
+
+$(document).ready(function() {
+  Documentation.init();
+});

content/docs/kie/0.1.0/_static/documentation_options.js

diff --git a/content/docs/kie/0.1.0/_static/documentation_options.js b/content/docs/kie/0.1.0/_static/documentation_options.js
new file mode 100644
index 0000000..6d86510
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/documentation_options.js
@@ -0,0 +1,10 @@
+var DOCUMENTATION_OPTIONS = {
+    URL_ROOT: document.getElementById("documentation_options").getAttribute('data-url_root'),
+    VERSION: '',
+    LANGUAGE: 'None',
+    COLLAPSE_INDEX: false,
+    FILE_SUFFIX: '.html',
+    HAS_SOURCE: true,
+    SOURCELINK_SUFFIX: '.txt',
+    NAVIGATION_WITH_KEYS: false
+};
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+    <glyph glyph-name="uniF2E1" unicode="&#xf2e1;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E2" unicode="&#xf2e2;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E3" unicode="&#xf2e3;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E4" unicode="&#xf2e4;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E5" unicode="&#xf2e5;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E6" unicode="&#xf2e6;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E7" unicode="&#xf2e7;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="_698" unicode="&#xf2e8;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2E9" unicode="&#xf2e9;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2EA" unicode="&#xf2ea;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2EB" unicode="&#xf2eb;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2EC" unicode="&#xf2ec;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2ED" unicode="&#xf2ed;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="uniF2EE" unicode="&#xf2ee;" horiz-adv-x="1792" 
+ />
+    <glyph glyph-name="lessequal" unicode="&#xf500;" horiz-adv-x="1792" 
+ />
+  </font>
+</defs></svg>

content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.ttf

diff --git a/content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.ttf b/content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.ttf
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content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.woff

diff --git a/content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.woff b/content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.woff
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content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.woff2

diff --git a/content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.woff2 b/content/docs/kie/0.1.0/_static/fonts/fontawesome-webfont.woff2
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content/docs/kie/0.1.0/_static/jquery-3.4.1.js

diff --git a/content/docs/kie/0.1.0/_static/jquery-3.4.1.js b/content/docs/kie/0.1.0/_static/jquery-3.4.1.js
new file mode 100644
index 0000000..773ad95
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/jquery-3.4.1.js
@@ -0,0 +1,10598 @@
+/*!
+ * jQuery JavaScript Library v3.4.1
+ * https://jquery.com/
+ *
+ * Includes Sizzle.js
+ * https://sizzlejs.com/
+ *
+ * Copyright JS Foundation and other contributors
+ * Released under the MIT license
+ * https://jquery.org/license
+ *
+ * Date: 2019-05-01T21:04Z
+ */
+( function( global, factory ) {
+
+	"use strict";
+
+	if ( typeof module === "object" && typeof module.exports === "object" ) {
+
+		// For CommonJS and CommonJS-like environments where a proper `window`
+		// is present, execute the factory and get jQuery.
+		// For environments that do not have a `window` with a `document`
+		// (such as Node.js), expose a factory as module.exports.
+		// This accentuates the need for the creation of a real `window`.
+		// e.g. var jQuery = require("jquery")(window);
+		// See ticket #14549 for more info.
+		module.exports = global.document ?
+			factory( global, true ) :
+			function( w ) {
+				if ( !w.document ) {
+					throw new Error( "jQuery requires a window with a document" );
+				}
+				return factory( w );
+			};
+	} else {
+		factory( global );
+	}
+
+// Pass this if window is not defined yet
+} )( typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
+
+// Edge <= 12 - 13+, Firefox <=18 - 45+, IE 10 - 11, Safari 5.1 - 9+, iOS 6 - 9.1
+// throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode
+// arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common
+// enough that all such attempts are guarded in a try block.
+"use strict";
+
+var arr = [];
+
+var document = window.document;
+
+var getProto = Object.getPrototypeOf;
+
+var slice = arr.slice;
+
+var concat = arr.concat;
+
+var push = arr.push;
+
+var indexOf = arr.indexOf;
+
+var class2type = {};
+
+var toString = class2type.toString;
+
+var hasOwn = class2type.hasOwnProperty;
+
+var fnToString = hasOwn.toString;
+
+var ObjectFunctionString = fnToString.call( Object );
+
+var support = {};
+
+var isFunction = function isFunction( obj ) {
+
+      // Support: Chrome <=57, Firefox <=52
+      // In some browsers, typeof returns "function" for HTML <object> elements
+      // (i.e., `typeof document.createElement( "object" ) === "function"`).
+      // We don't want to classify *any* DOM node as a function.
+      return typeof obj === "function" && typeof obj.nodeType !== "number";
+  };
+
+
+var isWindow = function isWindow( obj ) {
+		return obj != null && obj === obj.window;
+	};
+
+
+
+
+	var preservedScriptAttributes = {
+		type: true,
+		src: true,
+		nonce: true,
+		noModule: true
+	};
+
+	function DOMEval( code, node, doc ) {
+		doc = doc || document;
+
+		var i, val,
+			script = doc.createElement( "script" );
+
+		script.text = code;
+		if ( node ) {
+			for ( i in preservedScriptAttributes ) {
+
+				// Support: Firefox 64+, Edge 18+
+				// Some browsers don't support the "nonce" property on scripts.
+				// On the other hand, just using `getAttribute` is not enough as
+				// the `nonce` attribute is reset to an empty string whenever it
+				// becomes browsing-context connected.
+				// See https://github.com/whatwg/html/issues/2369
+				// See https://html.spec.whatwg.org/#nonce-attributes
+				// The `node.getAttribute` check was added for the sake of
+				// `jQuery.globalEval` so that it can fake a nonce-containing node
+				// via an object.
+				val = node[ i ] || node.getAttribute && node.getAttribute( i );
+				if ( val ) {
+					script.setAttribute( i, val );
+				}
+			}
+		}
+		doc.head.appendChild( script ).parentNode.removeChild( script );
+	}
+
+
+function toType( obj ) {
+	if ( obj == null ) {
+		return obj + "";
+	}
+
+	// Support: Android <=2.3 only (functionish RegExp)
+	return typeof obj === "object" || typeof obj === "function" ?
+		class2type[ toString.call( obj ) ] || "object" :
+		typeof obj;
+}
+/* global Symbol */
+// Defining this global in .eslintrc.json would create a danger of using the global
+// unguarded in another place, it seems safer to define global only for this module
+
+
+
+var
+	version = "3.4.1",
+
+	// Define a local copy of jQuery
+	jQuery = function( selector, context ) {
+
+		// The jQuery object is actually just the init constructor 'enhanced'
+		// Need init if jQuery is called (just allow error to be thrown if not included)
+		return new jQuery.fn.init( selector, context );
+	},
+
+	// Support: Android <=4.0 only
+	// Make sure we trim BOM and NBSP
+	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
+
+jQuery.fn = jQuery.prototype = {
+
+	// The current version of jQuery being used
+	jquery: version,
+
+	constructor: jQuery,
+
+	// The default length of a jQuery object is 0
+	length: 0,
+
+	toArray: function() {
+		return slice.call( this );
+	},
+
+	// Get the Nth element in the matched element set OR
+	// Get the whole matched element set as a clean array
+	get: function( num ) {
+
+		// Return all the elements in a clean array
+		if ( num == null ) {
+			return slice.call( this );
+		}
+
+		// Return just the one element from the set
+		return num < 0 ? this[ num + this.length ] : this[ num ];
+	},
+
+	// Take an array of elements and push it onto the stack
+	// (returning the new matched element set)
+	pushStack: function( elems ) {
+
+		// Build a new jQuery matched element set
+		var ret = jQuery.merge( this.constructor(), elems );
+
+		// Add the old object onto the stack (as a reference)
+		ret.prevObject = this;
+
+		// Return the newly-formed element set
+		return ret;
+	},
+
+	// Execute a callback for every element in the matched set.
+	each: function( callback ) {
+		return jQuery.each( this, callback );
+	},
+
+	map: function( callback ) {
+		return this.pushStack( jQuery.map( this, function( elem, i ) {
+			return callback.call( elem, i, elem );
+		} ) );
+	},
+
+	slice: function() {
+		return this.pushStack( slice.apply( this, arguments ) );
+	},
+
+	first: function() {
+		return this.eq( 0 );
+	},
+
+	last: function() {
+		return this.eq( -1 );
+	},
+
+	eq: function( i ) {
+		var len = this.length,
+			j = +i + ( i < 0 ? len : 0 );
+		return this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );
+	},
+
+	end: function() {
+		return this.prevObject || this.constructor();
+	},
+
+	// For internal use only.
+	// Behaves like an Array's method, not like a jQuery method.
+	push: push,
+	sort: arr.sort,
+	splice: arr.splice
+};
+
+jQuery.extend = jQuery.fn.extend = function() {
+	var options, name, src, copy, copyIsArray, clone,
+		target = arguments[ 0 ] || {},
+		i = 1,
+		length = arguments.length,
+		deep = false;
+
+	// Handle a deep copy situation
+	if ( typeof target === "boolean" ) {
+		deep = target;
+
+		// Skip the boolean and the target
+		target = arguments[ i ] || {};
+		i++;
+	}
+
+	// Handle case when target is a string or something (possible in deep copy)
+	if ( typeof target !== "object" && !isFunction( target ) ) {
+		target = {};
+	}
+
+	// Extend jQuery itself if only one argument is passed
+	if ( i === length ) {
+		target = this;
+		i--;
+	}
+
+	for ( ; i < length; i++ ) {
+
+		// Only deal with non-null/undefined values
+		if ( ( options = arguments[ i ] ) != null ) {
+
+			// Extend the base object
+			for ( name in options ) {
+				copy = options[ name ];
+
+				// Prevent Object.prototype pollution
+				// Prevent never-ending loop
+				if ( name === "__proto__" || target === copy ) {
+					continue;
+				}
+
+				// Recurse if we're merging plain objects or arrays
+				if ( deep && copy && ( jQuery.isPlainObject( copy ) ||
+					( copyIsArray = Array.isArray( copy ) ) ) ) {
+					src = target[ name ];
+
+					// Ensure proper type for the source value
+					if ( copyIsArray && !Array.isArray( src ) ) {
+						clone = [];
+					} else if ( !copyIsArray && !jQuery.isPlainObject( src ) ) {
+						clone = {};
+					} else {
+						clone = src;
+					}
+					copyIsArray = false;
+
+					// Never move original objects, clone them
+					target[ name ] = jQuery.extend( deep, clone, copy );
+
+				// Don't bring in undefined values
+				} else if ( copy !== undefined ) {
+					target[ name ] = copy;
+				}
+			}
+		}
+	}
+
+	// Return the modified object
+	return target;
+};
+
+jQuery.extend( {
+
+	// Unique for each copy of jQuery on the page
+	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
+
+	// Assume jQuery is ready without the ready module
+	isReady: true,
+
+	error: function( msg ) {
+		throw new Error( msg );
+	},
+
+	noop: function() {},
+
+	isPlainObject: function( obj ) {
+		var proto, Ctor;
+
+		// Detect obvious negatives
+		// Use toString instead of jQuery.type to catch host objects
+		if ( !obj || toString.call( obj ) !== "[object Object]" ) {
+			return false;
+		}
+
+		proto = getProto( obj );
+
+		// Objects with no prototype (e.g., `Object.create( null )`) are plain
+		if ( !proto ) {
+			return true;
+		}
+
+		// Objects with prototype are plain iff they were constructed by a global Object function
+		Ctor = hasOwn.call( proto, "constructor" ) && proto.constructor;
+		return typeof Ctor === "function" && fnToString.call( Ctor ) === ObjectFunctionString;
+	},
+
+	isEmptyObject: function( obj ) {
+		var name;
+
+		for ( name in obj ) {
+			return false;
+		}
+		return true;
+	},
+
+	// Evaluates a script in a global context
+	globalEval: function( code, options ) {
+		DOMEval( code, { nonce: options && options.nonce } );
+	},
+
+	each: function( obj, callback ) {
+		var length, i = 0;
+
+		if ( isArrayLike( obj ) ) {
+			length = obj.length;
+			for ( ; i < length; i++ ) {
+				if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
+					break;
+				}
+			}
+		} else {
+			for ( i in obj ) {
+				if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
+					break;
+				}
+			}
+		}
+
+		return obj;
+	},
+
+	// Support: Android <=4.0 only
+	trim: function( text ) {
+		return text == null ?
+			"" :
+			( text + "" ).replace( rtrim, "" );
+	},
+
+	// results is for internal usage only
+	makeArray: function( arr, results ) {
+		var ret = results || [];
+
+		if ( arr != null ) {
+			if ( isArrayLike( Object( arr ) ) ) {
+				jQuery.merge( ret,
+					typeof arr === "string" ?
+					[ arr ] : arr
+				);
+			} else {
+				push.call( ret, arr );
+			}
+		}
+
+		return ret;
+	},
+
+	inArray: function( elem, arr, i ) {
+		return arr == null ? -1 : indexOf.call( arr, elem, i );
+	},
+
+	// Support: Android <=4.0 only, PhantomJS 1 only
+	// push.apply(_, arraylike) throws on ancient WebKit
+	merge: function( first, second ) {
+		var len = +second.length,
+			j = 0,
+			i = first.length;
+
+		for ( ; j < len; j++ ) {
+			first[ i++ ] = second[ j ];
+		}
+
+		first.length = i;
+
+		return first;
+	},
+
+	grep: function( elems, callback, invert ) {
+		var callbackInverse,
+			matches = [],
+			i = 0,
+			length = elems.length,
+			callbackExpect = !invert;
+
+		// Go through the array, only saving the items
+		// that pass the validator function
+		for ( ; i < length; i++ ) {
+			callbackInverse = !callback( elems[ i ], i );
+			if ( callbackInverse !== callbackExpect ) {
+				matches.push( elems[ i ] );
+			}
+		}
+
+		return matches;
+	},
+
+	// arg is for internal usage only
+	map: function( elems, callback, arg ) {
+		var length, value,
+			i = 0,
+			ret = [];
+
+		// Go through the array, translating each of the items to their new values
+		if ( isArrayLike( elems ) ) {
+			length = elems.length;
+			for ( ; i < length; i++ ) {
+				value = callback( elems[ i ], i, arg );
+
+				if ( value != null ) {
+					ret.push( value );
+				}
+			}
+
+		// Go through every key on the object,
+		} else {
+			for ( i in elems ) {
+				value = callback( elems[ i ], i, arg );
+
+				if ( value != null ) {
+					ret.push( value );
+				}
+			}
+		}
+
+		// Flatten any nested arrays
+		return concat.apply( [], ret );
+	},
+
+	// A global GUID counter for objects
+	guid: 1,
+
+	// jQuery.support is not used in Core but other projects attach their
+	// properties to it so it needs to exist.
+	support: support
+} );
+
+if ( typeof Symbol === "function" ) {
+	jQuery.fn[ Symbol.iterator ] = arr[ Symbol.iterator ];
+}
+
+// Populate the class2type map
+jQuery.each( "Boolean Number String Function Array Date RegExp Object Error Symbol".split( " " ),
+function( i, name ) {
+	class2type[ "[object " + name + "]" ] = name.toLowerCase();
+} );
+
+function isArrayLike( obj ) {
+
+	// Support: real iOS 8.2 only (not reproducible in simulator)
+	// `in` check used to prevent JIT error (gh-2145)
+	// hasOwn isn't used here due to false negatives
+	// regarding Nodelist length in IE
+	var length = !!obj && "length" in obj && obj.length,
+		type = toType( obj );
+
+	if ( isFunction( obj ) || isWindow( obj ) ) {
+		return false;
+	}
+
+	return type === "array" || length === 0 ||
+		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
+}
+var Sizzle =
+/*!
+ * Sizzle CSS Selector Engine v2.3.4
+ * https://sizzlejs.com/
+ *
+ * Copyright JS Foundation and other contributors
+ * Released under the MIT license
+ * https://js.foundation/
+ *
+ * Date: 2019-04-08
+ */
+(function( window ) {
+
+var i,
+	support,
+	Expr,
+	getText,
+	isXML,
+	tokenize,
+	compile,
+	select,
+	outermostContext,
+	sortInput,
+	hasDuplicate,
+
+	// Local document vars
+	setDocument,
+	document,
+	docElem,
+	documentIsHTML,
+	rbuggyQSA,
+	rbuggyMatches,
+	matches,
+	contains,
+
+	// Instance-specific data
+	expando = "sizzle" + 1 * new Date(),
+	preferredDoc = window.document,
+	dirruns = 0,
+	done = 0,
+	classCache = createCache(),
+	tokenCache = createCache(),
+	compilerCache = createCache(),
+	nonnativeSelectorCache = createCache(),
+	sortOrder = function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+		}
+		return 0;
+	},
+
+	// Instance methods
+	hasOwn = ({}).hasOwnProperty,
+	arr = [],
+	pop = arr.pop,
+	push_native = arr.push,
+	push = arr.push,
+	slice = arr.slice,
+	// Use a stripped-down indexOf as it's faster than native
+	// https://jsperf.com/thor-indexof-vs-for/5
+	indexOf = function( list, elem ) {
+		var i = 0,
+			len = list.length;
+		for ( ; i < len; i++ ) {
+			if ( list[i] === elem ) {
+				return i;
+			}
+		}
+		return -1;
+	},
+
+	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
+
+	// Regular expressions
+
+	// http://www.w3.org/TR/css3-selectors/#whitespace
+	whitespace = "[\\x20\\t\\r\\n\\f]",
+
+	// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
+	identifier = "(?:\\\\.|[\\w-]|[^\0-\\xa0])+",
+
+	// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
+	attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +
+		// Operator (capture 2)
+		"*([*^$|!~]?=)" + whitespace +
+		// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
+		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
+		"*\\]",
+
+	pseudos = ":(" + identifier + ")(?:\\((" +
+		// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
+		// 1. quoted (capture 3; capture 4 or capture 5)
+		"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
+		// 2. simple (capture 6)
+		"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
+		// 3. anything else (capture 2)
+		".*" +
+		")\\)|)",
+
+	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
+	rwhitespace = new RegExp( whitespace + "+", "g" ),
+	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
+
+	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
+	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
+	rdescend = new RegExp( whitespace + "|>" ),
+
+	rpseudo = new RegExp( pseudos ),
+	ridentifier = new RegExp( "^" + identifier + "$" ),
+
+	matchExpr = {
+		"ID": new RegExp( "^#(" + identifier + ")" ),
+		"CLASS": new RegExp( "^\\.(" + identifier + ")" ),
+		"TAG": new RegExp( "^(" + identifier + "|[*])" ),
+		"ATTR": new RegExp( "^" + attributes ),
+		"PSEUDO": new RegExp( "^" + pseudos ),
+		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
+			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
+			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
+		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
+		// For use in libraries implementing .is()
+		// We use this for POS matching in `select`
+		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
+			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
+	},
+
+	rhtml = /HTML$/i,
+	rinputs = /^(?:input|select|textarea|button)$/i,
+	rheader = /^h\d$/i,
+
+	rnative = /^[^{]+\{\s*\[native \w/,
+
+	// Easily-parseable/retrievable ID or TAG or CLASS selectors
+	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
+
+	rsibling = /[+~]/,
+
+	// CSS escapes
+	// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
+	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
+	funescape = function( _, escaped, escapedWhitespace ) {
+		var high = "0x" + escaped - 0x10000;
+		// NaN means non-codepoint
+		// Support: Firefox<24
+		// Workaround erroneous numeric interpretation of +"0x"
+		return high !== high || escapedWhitespace ?
+			escaped :
+			high < 0 ?
+				// BMP codepoint
+				String.fromCharCode( high + 0x10000 ) :
+				// Supplemental Plane codepoint (surrogate pair)
+				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
+	},
+
+	// CSS string/identifier serialization
+	// https://drafts.csswg.org/cssom/#common-serializing-idioms
+	rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\0-\x1f\x7f-\uFFFF\w-]/g,
+	fcssescape = function( ch, asCodePoint ) {
+		if ( asCodePoint ) {
+
+			// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
+			if ( ch === "\0" ) {
+				return "\uFFFD";
+			}
+
+			// Control characters and (dependent upon position) numbers get escaped as code points
+			return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
+		}
+
+		// Other potentially-special ASCII characters get backslash-escaped
+		return "\\" + ch;
+	},
+
+	// Used for iframes
+	// See setDocument()
+	// Removing the function wrapper causes a "Permission Denied"
+	// error in IE
+	unloadHandler = function() {
+		setDocument();
+	},
+
+	inDisabledFieldset = addCombinator(
+		function( elem ) {
+			return elem.disabled === true && elem.nodeName.toLowerCase() === "fieldset";
+		},
+		{ dir: "parentNode", next: "legend" }
+	);
+
+// Optimize for push.apply( _, NodeList )
+try {
+	push.apply(
+		(arr = slice.call( preferredDoc.childNodes )),
+		preferredDoc.childNodes
+	);
+	// Support: Android<4.0
+	// Detect silently failing push.apply
+	arr[ preferredDoc.childNodes.length ].nodeType;
+} catch ( e ) {
+	push = { apply: arr.length ?
+
+		// Leverage slice if possible
+		function( target, els ) {
+			push_native.apply( target, slice.call(els) );
+		} :
+
+		// Support: IE<9
+		// Otherwise append directly
+		function( target, els ) {
+			var j = target.length,
+				i = 0;
+			// Can't trust NodeList.length
+			while ( (target[j++] = els[i++]) ) {}
+			target.length = j - 1;
+		}
+	};
+}
+
+function Sizzle( selector, context, results, seed ) {
+	var m, i, elem, nid, match, groups, newSelector,
+		newContext = context && context.ownerDocument,
+
+		// nodeType defaults to 9, since context defaults to document
+		nodeType = context ? context.nodeType : 9;
+
+	results = results || [];
+
+	// Return early from calls with invalid selector or context
+	if ( typeof selector !== "string" || !selector ||
+		nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
+
+		return results;
+	}
+
+	// Try to shortcut find operations (as opposed to filters) in HTML documents
+	if ( !seed ) {
+
+		if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
+			setDocument( context );
+		}
+		context = context || document;
+
+		if ( documentIsHTML ) {
+
+			// If the selector is sufficiently simple, try using a "get*By*" DOM method
+			// (excepting DocumentFragment context, where the methods don't exist)
+			if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
+
+				// ID selector
+				if ( (m = match[1]) ) {
+
+					// Document context
+					if ( nodeType === 9 ) {
+						if ( (elem = context.getElementById( m )) ) {
+
+							// Support: IE, Opera, Webkit
+							// TODO: identify versions
+							// getElementById can match elements by name instead of ID
+							if ( elem.id === m ) {
+								results.push( elem );
+								return results;
+							}
+						} else {
+							return results;
+						}
+
+					// Element context
+					} else {
+
+						// Support: IE, Opera, Webkit
+						// TODO: identify versions
+						// getElementById can match elements by name instead of ID
+						if ( newContext && (elem = newContext.getElementById( m )) &&
+							contains( context, elem ) &&
+							elem.id === m ) {
+
+							results.push( elem );
+							return results;
+						}
+					}
+
+				// Type selector
+				} else if ( match[2] ) {
+					push.apply( results, context.getElementsByTagName( selector ) );
+					return results;
+
+				// Class selector
+				} else if ( (m = match[3]) && support.getElementsByClassName &&
+					context.getElementsByClassName ) {
+
+					push.apply( results, context.getElementsByClassName( m ) );
+					return results;
+				}
+			}
+
+			// Take advantage of querySelectorAll
+			if ( support.qsa &&
+				!nonnativeSelectorCache[ selector + " " ] &&
+				(!rbuggyQSA || !rbuggyQSA.test( selector )) &&
+
+				// Support: IE 8 only
+				// Exclude object elements
+				(nodeType !== 1 || context.nodeName.toLowerCase() !== "object") ) {
+
+				newSelector = selector;
+				newContext = context;
+
+				// qSA considers elements outside a scoping root when evaluating child or
+				// descendant combinators, which is not what we want.
+				// In such cases, we work around the behavior by prefixing every selector in the
+				// list with an ID selector referencing the scope context.
+				// Thanks to Andrew Dupont for this technique.
+				if ( nodeType === 1 && rdescend.test( selector ) ) {
+
+					// Capture the context ID, setting it first if necessary
+					if ( (nid = context.getAttribute( "id" )) ) {
+						nid = nid.replace( rcssescape, fcssescape );
+					} else {
+						context.setAttribute( "id", (nid = expando) );
+					}
+
+					// Prefix every selector in the list
+					groups = tokenize( selector );
+					i = groups.length;
+					while ( i-- ) {
+						groups[i] = "#" + nid + " " + toSelector( groups[i] );
+					}
+					newSelector = groups.join( "," );
+
+					// Expand context for sibling selectors
+					newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
+						context;
+				}
+
+				try {
+					push.apply( results,
+						newContext.querySelectorAll( newSelector )
+					);
+					return results;
+				} catch ( qsaError ) {
+					nonnativeSelectorCache( selector, true );
+				} finally {
+					if ( nid === expando ) {
+						context.removeAttribute( "id" );
+					}
+				}
+			}
+		}
+	}
+
+	// All others
+	return select( selector.replace( rtrim, "$1" ), context, results, seed );
+}
+
+/**
+ * Create key-value caches of limited size
+ * @returns {function(string, object)} Returns the Object data after storing it on itself with
+ *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
+ *	deleting the oldest entry
+ */
+function createCache() {
+	var keys = [];
+
+	function cache( key, value ) {
+		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
+		if ( keys.push( key + " " ) > Expr.cacheLength ) {
+			// Only keep the most recent entries
+			delete cache[ keys.shift() ];
+		}
+		return (cache[ key + " " ] = value);
+	}
+	return cache;
+}
+
+/**
+ * Mark a function for special use by Sizzle
+ * @param {Function} fn The function to mark
+ */
+function markFunction( fn ) {
+	fn[ expando ] = true;
+	return fn;
+}
+
+/**
+ * Support testing using an element
+ * @param {Function} fn Passed the created element and returns a boolean result
+ */
+function assert( fn ) {
+	var el = document.createElement("fieldset");
+
+	try {
+		return !!fn( el );
+	} catch (e) {
+		return false;
+	} finally {
+		// Remove from its parent by default
+		if ( el.parentNode ) {
+			el.parentNode.removeChild( el );
+		}
+		// release memory in IE
+		el = null;
+	}
+}
+
+/**
+ * Adds the same handler for all of the specified attrs
+ * @param {String} attrs Pipe-separated list of attributes
+ * @param {Function} handler The method that will be applied
+ */
+function addHandle( attrs, handler ) {
+	var arr = attrs.split("|"),
+		i = arr.length;
+
+	while ( i-- ) {
+		Expr.attrHandle[ arr[i] ] = handler;
+	}
+}
+
+/**
+ * Checks document order of two siblings
+ * @param {Element} a
+ * @param {Element} b
+ * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
+ */
+function siblingCheck( a, b ) {
+	var cur = b && a,
+		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
+			a.sourceIndex - b.sourceIndex;
+
+	// Use IE sourceIndex if available on both nodes
+	if ( diff ) {
+		return diff;
+	}
+
+	// Check if b follows a
+	if ( cur ) {
+		while ( (cur = cur.nextSibling) ) {
+			if ( cur === b ) {
+				return -1;
+			}
+		}
+	}
+
+	return a ? 1 : -1;
+}
+
+/**
+ * Returns a function to use in pseudos for input types
+ * @param {String} type
+ */
+function createInputPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return name === "input" && elem.type === type;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for buttons
+ * @param {String} type
+ */
+function createButtonPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return (name === "input" || name === "button") && elem.type === type;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for :enabled/:disabled
+ * @param {Boolean} disabled true for :disabled; false for :enabled
+ */
+function createDisabledPseudo( disabled ) {
+
+	// Known :disabled false positives: fieldset[disabled] > legend:nth-of-type(n+2) :can-disable
+	return function( elem ) {
+
+		// Only certain elements can match :enabled or :disabled
+		// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled
+		// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled
+		if ( "form" in elem ) {
+
+			// Check for inherited disabledness on relevant non-disabled elements:
+			// * listed form-associated elements in a disabled fieldset
+			//   https://html.spec.whatwg.org/multipage/forms.html#category-listed
+			//   https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled
+			// * option elements in a disabled optgroup
+			//   https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled
+			// All such elements have a "form" property.
+			if ( elem.parentNode && elem.disabled === false ) {
+
+				// Option elements defer to a parent optgroup if present
+				if ( "label" in elem ) {
+					if ( "label" in elem.parentNode ) {
+						return elem.parentNode.disabled === disabled;
+					} else {
+						return elem.disabled === disabled;
+					}
+				}
+
+				// Support: IE 6 - 11
+				// Use the isDisabled shortcut property to check for disabled fieldset ancestors
+				return elem.isDisabled === disabled ||
+
+					// Where there is no isDisabled, check manually
+					/* jshint -W018 */
+					elem.isDisabled !== !disabled &&
+						inDisabledFieldset( elem ) === disabled;
+			}
+
+			return elem.disabled === disabled;
+
+		// Try to winnow out elements that can't be disabled before trusting the disabled property.
+		// Some victims get caught in our net (label, legend, menu, track), but it shouldn't
+		// even exist on them, let alone have a boolean value.
+		} else if ( "label" in elem ) {
+			return elem.disabled === disabled;
+		}
+
+		// Remaining elements are neither :enabled nor :disabled
+		return false;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for positionals
+ * @param {Function} fn
+ */
+function createPositionalPseudo( fn ) {
+	return markFunction(function( argument ) {
+		argument = +argument;
+		return markFunction(function( seed, matches ) {
+			var j,
+				matchIndexes = fn( [], seed.length, argument ),
+				i = matchIndexes.length;
+
+			// Match elements found at the specified indexes
+			while ( i-- ) {
+				if ( seed[ (j = matchIndexes[i]) ] ) {
+					seed[j] = !(matches[j] = seed[j]);
+				}
+			}
+		});
+	});
+}
+
+/**
+ * Checks a node for validity as a Sizzle context
+ * @param {Element|Object=} context
+ * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
+ */
+function testContext( context ) {
+	return context && typeof context.getElementsByTagName !== "undefined" && context;
+}
+
+// Expose support vars for convenience
+support = Sizzle.support = {};
+
+/**
+ * Detects XML nodes
+ * @param {Element|Object} elem An element or a document
+ * @returns {Boolean} True iff elem is a non-HTML XML node
+ */
+isXML = Sizzle.isXML = function( elem ) {
+	var namespace = elem.namespaceURI,
+		docElem = (elem.ownerDocument || elem).documentElement;
+
+	// Support: IE <=8
+	// Assume HTML when documentElement doesn't yet exist, such as inside loading iframes
+	// https://bugs.jquery.com/ticket/4833
+	return !rhtml.test( namespace || docElem && docElem.nodeName || "HTML" );
+};
+
+/**
+ * Sets document-related variables once based on the current document
+ * @param {Element|Object} [doc] An element or document object to use to set the document
+ * @returns {Object} Returns the current document
+ */
+setDocument = Sizzle.setDocument = function( node ) {
+	var hasCompare, subWindow,
+		doc = node ? node.ownerDocument || node : preferredDoc;
+
+	// Return early if doc is invalid or already selected
+	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
+		return document;
+	}
+
+	// Update global variables
+	document = doc;
+	docElem = document.documentElement;
+	documentIsHTML = !isXML( document );
+
+	// Support: IE 9-11, Edge
+	// Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936)
+	if ( preferredDoc !== document &&
+		(subWindow = document.defaultView) && subWindow.top !== subWindow ) {
+
+		// Support: IE 11, Edge
+		if ( subWindow.addEventListener ) {
+			subWindow.addEventListener( "unload", unloadHandler, false );
+
+		// Support: IE 9 - 10 only
+		} else if ( subWindow.attachEvent ) {
+			subWindow.attachEvent( "onunload", unloadHandler );
+		}
+	}
+
+	/* Attributes
+	---------------------------------------------------------------------- */
+
+	// Support: IE<8
+	// Verify that getAttribute really returns attributes and not properties
+	// (excepting IE8 booleans)
+	support.attributes = assert(function( el ) {
+		el.className = "i";
+		return !el.getAttribute("className");
+	});
+
+	/* getElement(s)By*
+	---------------------------------------------------------------------- */
+
+	// Check if getElementsByTagName("*") returns only elements
+	support.getElementsByTagName = assert(function( el ) {
+		el.appendChild( document.createComment("") );
+		return !el.getElementsByTagName("*").length;
+	});
+
+	// Support: IE<9
+	support.getElementsByClassName = rnative.test( document.getElementsByClassName );
+
+	// Support: IE<10
+	// Check if getElementById returns elements by name
+	// The broken getElementById methods don't pick up programmatically-set names,
+	// so use a roundabout getElementsByName test
+	support.getById = assert(function( el ) {
+		docElem.appendChild( el ).id = expando;
+		return !document.getElementsByName || !document.getElementsByName( expando ).length;
+	});
+
+	// ID filter and find
+	if ( support.getById ) {
+		Expr.filter["ID"] = function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				return elem.getAttribute("id") === attrId;
+			};
+		};
+		Expr.find["ID"] = function( id, context ) {
+			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
+				var elem = context.getElementById( id );
+				return elem ? [ elem ] : [];
+			}
+		};
+	} else {
+		Expr.filter["ID"] =  function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				var node = typeof elem.getAttributeNode !== "undefined" &&
+					elem.getAttributeNode("id");
+				return node && node.value === attrId;
+			};
+		};
+
+		// Support: IE 6 - 7 only
+		// getElementById is not reliable as a find shortcut
+		Expr.find["ID"] = function( id, context ) {
+			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
+				var node, i, elems,
+					elem = context.getElementById( id );
+
+				if ( elem ) {
+
+					// Verify the id attribute
+					node = elem.getAttributeNode("id");
+					if ( node && node.value === id ) {
+						return [ elem ];
+					}
+
+					// Fall back on getElementsByName
+					elems = context.getElementsByName( id );
+					i = 0;
+					while ( (elem = elems[i++]) ) {
+						node = elem.getAttributeNode("id");
+						if ( node && node.value === id ) {
+							return [ elem ];
+						}
+					}
+				}
+
+				return [];
+			}
+		};
+	}
+
+	// Tag
+	Expr.find["TAG"] = support.getElementsByTagName ?
+		function( tag, context ) {
+			if ( typeof context.getElementsByTagName !== "undefined" ) {
+				return context.getElementsByTagName( tag );
+
+			// DocumentFragment nodes don't have gEBTN
+			} else if ( support.qsa ) {
+				return context.querySelectorAll( tag );
+			}
+		} :
+
+		function( tag, context ) {
+			var elem,
+				tmp = [],
+				i = 0,
+				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
+				results = context.getElementsByTagName( tag );
+
+			// Filter out possible comments
+			if ( tag === "*" ) {
+				while ( (elem = results[i++]) ) {
+					if ( elem.nodeType === 1 ) {
+						tmp.push( elem );
+					}
+				}
+
+				return tmp;
+			}
+			return results;
+		};
+
+	// Class
+	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
+		if ( typeof context.getElementsByClassName !== "undefined" && documentIsHTML ) {
+			return context.getElementsByClassName( className );
+		}
+	};
+
+	/* QSA/matchesSelector
+	---------------------------------------------------------------------- */
+
+	// QSA and matchesSelector support
+
+	// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
+	rbuggyMatches = [];
+
+	// qSa(:focus) reports false when true (Chrome 21)
+	// We allow this because of a bug in IE8/9 that throws an error
+	// whenever `document.activeElement` is accessed on an iframe
+	// So, we allow :focus to pass through QSA all the time to avoid the IE error
+	// See https://bugs.jquery.com/ticket/13378
+	rbuggyQSA = [];
+
+	if ( (support.qsa = rnative.test( document.querySelectorAll )) ) {
+		// Build QSA regex
+		// Regex strategy adopted from Diego Perini
+		assert(function( el ) {
+			// Select is set to empty string on purpose
+			// This is to test IE's treatment of not explicitly
+			// setting a boolean content attribute,
+			// since its presence should be enough
+			// https://bugs.jquery.com/ticket/12359
+			docElem.appendChild( el ).innerHTML = "<a id='" + expando + "'></a>" +
+				"<select id='" + expando + "-\r\\' msallowcapture=''>" +
+				"<option selected=''></option></select>";
+
+			// Support: IE8, Opera 11-12.16
+			// Nothing should be selected when empty strings follow ^= or $= or *=
+			// The test attribute must be unknown in Opera but "safe" for WinRT
+			// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
+			if ( el.querySelectorAll("[msallowcapture^='']").length ) {
+				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
+			}
+
+			// Support: IE8
+			// Boolean attributes and "value" are not treated correctly
+			if ( !el.querySelectorAll("[selected]").length ) {
+				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
+			}
+
+			// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
+			if ( !el.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
+				rbuggyQSA.push("~=");
+			}
+
+			// Webkit/Opera - :checked should return selected option elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			// IE8 throws error here and will not see later tests
+			if ( !el.querySelectorAll(":checked").length ) {
+				rbuggyQSA.push(":checked");
+			}
+
+			// Support: Safari 8+, iOS 8+
+			// https://bugs.webkit.org/show_bug.cgi?id=136851
+			// In-page `selector#id sibling-combinator selector` fails
+			if ( !el.querySelectorAll( "a#" + expando + "+*" ).length ) {
+				rbuggyQSA.push(".#.+[+~]");
+			}
+		});
+
+		assert(function( el ) {
+			el.innerHTML = "<a href='' disabled='disabled'></a>" +
+				"<select disabled='disabled'><option/></select>";
+
+			// Support: Windows 8 Native Apps
+			// The type and name attributes are restricted during .innerHTML assignment
+			var input = document.createElement("input");
+			input.setAttribute( "type", "hidden" );
+			el.appendChild( input ).setAttribute( "name", "D" );
+
+			// Support: IE8
+			// Enforce case-sensitivity of name attribute
+			if ( el.querySelectorAll("[name=d]").length ) {
+				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
+			}
+
+			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
+			// IE8 throws error here and will not see later tests
+			if ( el.querySelectorAll(":enabled").length !== 2 ) {
+				rbuggyQSA.push( ":enabled", ":disabled" );
+			}
+
+			// Support: IE9-11+
+			// IE's :disabled selector does not pick up the children of disabled fieldsets
+			docElem.appendChild( el ).disabled = true;
+			if ( el.querySelectorAll(":disabled").length !== 2 ) {
+				rbuggyQSA.push( ":enabled", ":disabled" );
+			}
+
+			// Opera 10-11 does not throw on post-comma invalid pseudos
+			el.querySelectorAll("*,:x");
+			rbuggyQSA.push(",.*:");
+		});
+	}
+
+	if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
+		docElem.webkitMatchesSelector ||
+		docElem.mozMatchesSelector ||
+		docElem.oMatchesSelector ||
+		docElem.msMatchesSelector) )) ) {
+
+		assert(function( el ) {
+			// Check to see if it's possible to do matchesSelector
+			// on a disconnected node (IE 9)
+			support.disconnectedMatch = matches.call( el, "*" );
+
+			// This should fail with an exception
+			// Gecko does not error, returns false instead
+			matches.call( el, "[s!='']:x" );
+			rbuggyMatches.push( "!=", pseudos );
+		});
+	}
+
+	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
+	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
+
+	/* Contains
+	---------------------------------------------------------------------- */
+	hasCompare = rnative.test( docElem.compareDocumentPosition );
+
+	// Element contains another
+	// Purposefully self-exclusive
+	// As in, an element does not contain itself
+	contains = hasCompare || rnative.test( docElem.contains ) ?
+		function( a, b ) {
+			var adown = a.nodeType === 9 ? a.documentElement : a,
+				bup = b && b.parentNode;
+			return a === bup || !!( bup && bup.nodeType === 1 && (
+				adown.contains ?
+					adown.contains( bup ) :
+					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
+			));
+		} :
+		function( a, b ) {
+			if ( b ) {
+				while ( (b = b.parentNode) ) {
+					if ( b === a ) {
+						return true;
+					}
+				}
+			}
+			return false;
+		};
+
+	/* Sorting
+	---------------------------------------------------------------------- */
+
+	// Document order sorting
+	sortOrder = hasCompare ?
+	function( a, b ) {
+
+		// Flag for duplicate removal
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		// Sort on method existence if only one input has compareDocumentPosition
+		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
+		if ( compare ) {
+			return compare;
+		}
+
+		// Calculate position if both inputs belong to the same document
+		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
+			a.compareDocumentPosition( b ) :
+
+			// Otherwise we know they are disconnected
+			1;
+
+		// Disconnected nodes
+		if ( compare & 1 ||
+			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
+
+			// Choose the first element that is related to our preferred document
+			if ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
+				return -1;
+			}
+			if ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
+				return 1;
+			}
+
+			// Maintain original order
+			return sortInput ?
+				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
+				0;
+		}
+
+		return compare & 4 ? -1 : 1;
+	} :
+	function( a, b ) {
+		// Exit early if the nodes are identical
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		var cur,
+			i = 0,
+			aup = a.parentNode,
+			bup = b.parentNode,
+			ap = [ a ],
+			bp = [ b ];
+
+		// Parentless nodes are either documents or disconnected
+		if ( !aup || !bup ) {
+			return a === document ? -1 :
+				b === document ? 1 :
+				aup ? -1 :
+				bup ? 1 :
+				sortInput ?
+				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
+				0;
+
+		// If the nodes are siblings, we can do a quick check
+		} else if ( aup === bup ) {
+			return siblingCheck( a, b );
+		}
+
+		// Otherwise we need full lists of their ancestors for comparison
+		cur = a;
+		while ( (cur = cur.parentNode) ) {
+			ap.unshift( cur );
+		}
+		cur = b;
+		while ( (cur = cur.parentNode) ) {
+			bp.unshift( cur );
+		}
+
+		// Walk down the tree looking for a discrepancy
+		while ( ap[i] === bp[i] ) {
+			i++;
+		}
+
+		return i ?
+			// Do a sibling check if the nodes have a common ancestor
+			siblingCheck( ap[i], bp[i] ) :
+
+			// Otherwise nodes in our document sort first
+			ap[i] === preferredDoc ? -1 :
+			bp[i] === preferredDoc ? 1 :
+			0;
+	};
+
+	return document;
+};
+
+Sizzle.matches = function( expr, elements ) {
+	return Sizzle( expr, null, null, elements );
+};
+
+Sizzle.matchesSelector = function( elem, expr ) {
+	// Set document vars if needed
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	if ( support.matchesSelector && documentIsHTML &&
+		!nonnativeSelectorCache[ expr + " " ] &&
+		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
+		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
+
+		try {
+			var ret = matches.call( elem, expr );
+
+			// IE 9's matchesSelector returns false on disconnected nodes
+			if ( ret || support.disconnectedMatch ||
+					// As well, disconnected nodes are said to be in a document
+					// fragment in IE 9
+					elem.document && elem.document.nodeType !== 11 ) {
+				return ret;
+			}
+		} catch (e) {
+			nonnativeSelectorCache( expr, true );
+		}
+	}
+
+	return Sizzle( expr, document, null, [ elem ] ).length > 0;
+};
+
+Sizzle.contains = function( context, elem ) {
+	// Set document vars if needed
+	if ( ( context.ownerDocument || context ) !== document ) {
+		setDocument( context );
+	}
+	return contains( context, elem );
+};
+
+Sizzle.attr = function( elem, name ) {
+	// Set document vars if needed
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	var fn = Expr.attrHandle[ name.toLowerCase() ],
+		// Don't get fooled by Object.prototype properties (jQuery #13807)
+		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
+			fn( elem, name, !documentIsHTML ) :
+			undefined;
+
+	return val !== undefined ?
+		val :
+		support.attributes || !documentIsHTML ?
+			elem.getAttribute( name ) :
+			(val = elem.getAttributeNode(name)) && val.specified ?
+				val.value :
+				null;
+};
+
+Sizzle.escape = function( sel ) {
+	return (sel + "").replace( rcssescape, fcssescape );
+};
+
+Sizzle.error = function( msg ) {
+	throw new Error( "Syntax error, unrecognized expression: " + msg );
+};
+
+/**
+ * Document sorting and removing duplicates
+ * @param {ArrayLike} results
+ */
+Sizzle.uniqueSort = function( results ) {
+	var elem,
+		duplicates = [],
+		j = 0,
+		i = 0;
+
+	// Unless we *know* we can detect duplicates, assume their presence
+	hasDuplicate = !support.detectDuplicates;
+	sortInput = !support.sortStable && results.slice( 0 );
+	results.sort( sortOrder );
+
+	if ( hasDuplicate ) {
+		while ( (elem = results[i++]) ) {
+			if ( elem === results[ i ] ) {
+				j = duplicates.push( i );
+			}
+		}
+		while ( j-- ) {
+			results.splice( duplicates[ j ], 1 );
+		}
+	}
+
+	// Clear input after sorting to release objects
+	// See https://github.com/jquery/sizzle/pull/225
+	sortInput = null;
+
+	return results;
+};
+
+/**
+ * Utility function for retrieving the text value of an array of DOM nodes
+ * @param {Array|Element} elem
+ */
+getText = Sizzle.getText = function( elem ) {
+	var node,
+		ret = "",
+		i = 0,
+		nodeType = elem.nodeType;
+
+	if ( !nodeType ) {
+		// If no nodeType, this is expected to be an array
+		while ( (node = elem[i++]) ) {
+			// Do not traverse comment nodes
+			ret += getText( node );
+		}
+	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
+		// Use textContent for elements
+		// innerText usage removed for consistency of new lines (jQuery #11153)
+		if ( typeof elem.textContent === "string" ) {
+			return elem.textContent;
+		} else {
+			// Traverse its children
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				ret += getText( elem );
+			}
+		}
+	} else if ( nodeType === 3 || nodeType === 4 ) {
+		return elem.nodeValue;
+	}
+	// Do not include comment or processing instruction nodes
+
+	return ret;
+};
+
+Expr = Sizzle.selectors = {
+
+	// Can be adjusted by the user
+	cacheLength: 50,
+
+	createPseudo: markFunction,
+
+	match: matchExpr,
+
+	attrHandle: {},
+
+	find: {},
+
+	relative: {
+		">": { dir: "parentNode", first: true },
+		" ": { dir: "parentNode" },
+		"+": { dir: "previousSibling", first: true },
+		"~": { dir: "previousSibling" }
+	},
+
+	preFilter: {
+		"ATTR": function( match ) {
+			match[1] = match[1].replace( runescape, funescape );
+
+			// Move the given value to match[3] whether quoted or unquoted
+			match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
+
+			if ( match[2] === "~=" ) {
+				match[3] = " " + match[3] + " ";
+			}
+
+			return match.slice( 0, 4 );
+		},
+
+		"CHILD": function( match ) {
+			/* matches from matchExpr["CHILD"]
+				1 type (only|nth|...)
+				2 what (child|of-type)
+				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
+				4 xn-component of xn+y argument ([+-]?\d*n|)
+				5 sign of xn-component
+				6 x of xn-component
+				7 sign of y-component
+				8 y of y-component
+			*/
+			match[1] = match[1].toLowerCase();
+
+			if ( match[1].slice( 0, 3 ) === "nth" ) {
+				// nth-* requires argument
+				if ( !match[3] ) {
+					Sizzle.error( match[0] );
+				}
+
+				// numeric x and y parameters for Expr.filter.CHILD
+				// remember that false/true cast respectively to 0/1
+				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
+				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
+
+			// other types prohibit arguments
+			} else if ( match[3] ) {
+				Sizzle.error( match[0] );
+			}
+
+			return match;
+		},
+
+		"PSEUDO": function( match ) {
+			var excess,
+				unquoted = !match[6] && match[2];
+
+			if ( matchExpr["CHILD"].test( match[0] ) ) {
+				return null;
+			}
+
+			// Accept quoted arguments as-is
+			if ( match[3] ) {
+				match[2] = match[4] || match[5] || "";
+
+			// Strip excess characters from unquoted arguments
+			} else if ( unquoted && rpseudo.test( unquoted ) &&
+				// Get excess from tokenize (recursively)
+				(excess = tokenize( unquoted, true )) &&
+				// advance to the next closing parenthesis
+				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
+
+				// excess is a negative index
+				match[0] = match[0].slice( 0, excess );
+				match[2] = unquoted.slice( 0, excess );
+			}
+
+			// Return only captures needed by the pseudo filter method (type and argument)
+			return match.slice( 0, 3 );
+		}
+	},
+
+	filter: {
+
+		"TAG": function( nodeNameSelector ) {
+			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
+			return nodeNameSelector === "*" ?
+				function() { return true; } :
+				function( elem ) {
+					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
+				};
+		},
+
+		"CLASS": function( className ) {
+			var pattern = classCache[ className + " " ];
+
+			return pattern ||
+				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
+				classCache( className, function( elem ) {
+					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
+				});
+		},
+
+		"ATTR": function( name, operator, check ) {
+			return function( elem ) {
+				var result = Sizzle.attr( elem, name );
+
+				if ( result == null ) {
+					return operator === "!=";
+				}
+				if ( !operator ) {
+					return true;
+				}
+
+				result += "";
+
+				return operator === "=" ? result === check :
+					operator === "!=" ? result !== check :
+					operator === "^=" ? check && result.indexOf( check ) === 0 :
+					operator === "*=" ? check && result.indexOf( check ) > -1 :
+					operator === "$=" ? check && result.slice( -check.length ) === check :
+					operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
+					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
+					false;
+			};
+		},
+
+		"CHILD": function( type, what, argument, first, last ) {
+			var simple = type.slice( 0, 3 ) !== "nth",
+				forward = type.slice( -4 ) !== "last",
+				ofType = what === "of-type";
+
+			return first === 1 && last === 0 ?
+
+				// Shortcut for :nth-*(n)
+				function( elem ) {
+					return !!elem.parentNode;
+				} :
+
+				function( elem, context, xml ) {
+					var cache, uniqueCache, outerCache, node, nodeIndex, start,
+						dir = simple !== forward ? "nextSibling" : "previousSibling",
+						parent = elem.parentNode,
+						name = ofType && elem.nodeName.toLowerCase(),
+						useCache = !xml && !ofType,
+						diff = false;
+
+					if ( parent ) {
+
+						// :(first|last|only)-(child|of-type)
+						if ( simple ) {
+							while ( dir ) {
+								node = elem;
+								while ( (node = node[ dir ]) ) {
+									if ( ofType ?
+										node.nodeName.toLowerCase() === name :
+										node.nodeType === 1 ) {
+
+										return false;
+									}
+								}
+								// Reverse direction for :only-* (if we haven't yet done so)
+								start = dir = type === "only" && !start && "nextSibling";
+							}
+							return true;
+						}
+
+						start = [ forward ? parent.firstChild : parent.lastChild ];
+
+						// non-xml :nth-child(...) stores cache data on `parent`
+						if ( forward && useCache ) {
+
+							// Seek `elem` from a previously-cached index
+
+							// ...in a gzip-friendly way
+							node = parent;
+							outerCache = node[ expando ] || (node[ expando ] = {});
+
+							// Support: IE <9 only
+							// Defend against cloned attroperties (jQuery gh-1709)
+							uniqueCache = outerCache[ node.uniqueID ] ||
+								(outerCache[ node.uniqueID ] = {});
+
+							cache = uniqueCache[ type ] || [];
+							nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
+							diff = nodeIndex && cache[ 2 ];
+							node = nodeIndex && parent.childNodes[ nodeIndex ];
+
+							while ( (node = ++nodeIndex && node && node[ dir ] ||
+
+								// Fallback to seeking `elem` from the start
+								(diff = nodeIndex = 0) || start.pop()) ) {
+
+								// When found, cache indexes on `parent` and break
+								if ( node.nodeType === 1 && ++diff && node === elem ) {
+									uniqueCache[ type ] = [ dirruns, nodeIndex, diff ];
+									break;
+								}
+							}
+
+						} else {
+							// Use previously-cached element index if available
+							if ( useCache ) {
+								// ...in a gzip-friendly way
+								node = elem;
+								outerCache = node[ expando ] || (node[ expando ] = {});
+
+								// Support: IE <9 only
+								// Defend against cloned attroperties (jQuery gh-1709)
+								uniqueCache = outerCache[ node.uniqueID ] ||
+									(outerCache[ node.uniqueID ] = {});
+
+								cache = uniqueCache[ type ] || [];
+								nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
+								diff = nodeIndex;
+							}
+
+							// xml :nth-child(...)
+							// or :nth-last-child(...) or :nth(-last)?-of-type(...)
+							if ( diff === false ) {
+								// Use the same loop as above to seek `elem` from the start
+								while ( (node = ++nodeIndex && node && node[ dir ] ||
+									(diff = nodeIndex = 0) || start.pop()) ) {
+
+									if ( ( ofType ?
+										node.nodeName.toLowerCase() === name :
+										node.nodeType === 1 ) &&
+										++diff ) {
+
+										// Cache the index of each encountered element
+										if ( useCache ) {
+											outerCache = node[ expando ] || (node[ expando ] = {});
+
+											// Support: IE <9 only
+											// Defend against cloned attroperties (jQuery gh-1709)
+											uniqueCache = outerCache[ node.uniqueID ] ||
+												(outerCache[ node.uniqueID ] = {});
+
+											uniqueCache[ type ] = [ dirruns, diff ];
+										}
+
+										if ( node === elem ) {
+											break;
+										}
+									}
+								}
+							}
+						}
+
+						// Incorporate the offset, then check against cycle size
+						diff -= last;
+						return diff === first || ( diff % first === 0 && diff / first >= 0 );
+					}
+				};
+		},
+
+		"PSEUDO": function( pseudo, argument ) {
+			// pseudo-class names are case-insensitive
+			// http://www.w3.org/TR/selectors/#pseudo-classes
+			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
+			// Remember that setFilters inherits from pseudos
+			var args,
+				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
+					Sizzle.error( "unsupported pseudo: " + pseudo );
+
+			// The user may use createPseudo to indicate that
+			// arguments are needed to create the filter function
+			// just as Sizzle does
+			if ( fn[ expando ] ) {
+				return fn( argument );
+			}
+
+			// But maintain support for old signatures
+			if ( fn.length > 1 ) {
+				args = [ pseudo, pseudo, "", argument ];
+				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
+					markFunction(function( seed, matches ) {
+						var idx,
+							matched = fn( seed, argument ),
+							i = matched.length;
+						while ( i-- ) {
+							idx = indexOf( seed, matched[i] );
+							seed[ idx ] = !( matches[ idx ] = matched[i] );
+						}
+					}) :
+					function( elem ) {
+						return fn( elem, 0, args );
+					};
+			}
+
+			return fn;
+		}
+	},
+
+	pseudos: {
+		// Potentially complex pseudos
+		"not": markFunction(function( selector ) {
+			// Trim the selector passed to compile
+			// to avoid treating leading and trailing
+			// spaces as combinators
+			var input = [],
+				results = [],
+				matcher = compile( selector.replace( rtrim, "$1" ) );
+
+			return matcher[ expando ] ?
+				markFunction(function( seed, matches, context, xml ) {
+					var elem,
+						unmatched = matcher( seed, null, xml, [] ),
+						i = seed.length;
+
+					// Match elements unmatched by `matcher`
+					while ( i-- ) {
+						if ( (elem = unmatched[i]) ) {
+							seed[i] = !(matches[i] = elem);
+						}
+					}
+				}) :
+				function( elem, context, xml ) {
+					input[0] = elem;
+					matcher( input, null, xml, results );
+					// Don't keep the element (issue #299)
+					input[0] = null;
+					return !results.pop();
+				};
+		}),
+
+		"has": markFunction(function( selector ) {
+			return function( elem ) {
+				return Sizzle( selector, elem ).length > 0;
+			};
+		}),
+
+		"contains": markFunction(function( text ) {
+			text = text.replace( runescape, funescape );
+			return function( elem ) {
+				return ( elem.textContent || getText( elem ) ).indexOf( text ) > -1;
+			};
+		}),
+
+		// "Whether an element is represented by a :lang() selector
+		// is based solely on the element's language value
+		// being equal to the identifier C,
+		// or beginning with the identifier C immediately followed by "-".
+		// The matching of C against the element's language value is performed case-insensitively.
+		// The identifier C does not have to be a valid language name."
+		// http://www.w3.org/TR/selectors/#lang-pseudo
+		"lang": markFunction( function( lang ) {
+			// lang value must be a valid identifier
+			if ( !ridentifier.test(lang || "") ) {
+				Sizzle.error( "unsupported lang: " + lang );
+			}
+			lang = lang.replace( runescape, funescape ).toLowerCase();
+			return function( elem ) {
+				var elemLang;
+				do {
+					if ( (elemLang = documentIsHTML ?
+						elem.lang :
+						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
+
+						elemLang = elemLang.toLowerCase();
+						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
+					}
+				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
+				return false;
+			};
+		}),
+
+		// Miscellaneous
+		"target": function( elem ) {
+			var hash = window.location && window.location.hash;
+			return hash && hash.slice( 1 ) === elem.id;
+		},
+
+		"root": function( elem ) {
+			return elem === docElem;
+		},
+
+		"focus": function( elem ) {
+			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
+		},
+
+		// Boolean properties
+		"enabled": createDisabledPseudo( false ),
+		"disabled": createDisabledPseudo( true ),
+
+		"checked": function( elem ) {
+			// In CSS3, :checked should return both checked and selected elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			var nodeName = elem.nodeName.toLowerCase();
+			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
+		},
+
+		"selected": function( elem ) {
+			// Accessing this property makes selected-by-default
+			// options in Safari work properly
+			if ( elem.parentNode ) {
+				elem.parentNode.selectedIndex;
+			}
+
+			return elem.selected === true;
+		},
+
+		// Contents
+		"empty": function( elem ) {
+			// http://www.w3.org/TR/selectors/#empty-pseudo
+			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
+			//   but not by others (comment: 8; processing instruction: 7; etc.)
+			// nodeType < 6 works because attributes (2) do not appear as children
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				if ( elem.nodeType < 6 ) {
+					return false;
+				}
+			}
+			return true;
+		},
+
+		"parent": function( elem ) {
+			return !Expr.pseudos["empty"]( elem );
+		},
+
+		// Element/input types
+		"header": function( elem ) {
+			return rheader.test( elem.nodeName );
+		},
+
+		"input": function( elem ) {
+			return rinputs.test( elem.nodeName );
+		},
+
+		"button": function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return name === "input" && elem.type === "button" || name === "button";
+		},
+
+		"text": function( elem ) {
+			var attr;
+			return elem.nodeName.toLowerCase() === "input" &&
+				elem.type === "text" &&
+
+				// Support: IE<8
+				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
+				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
+		},
+
+		// Position-in-collection
+		"first": createPositionalPseudo(function() {
+			return [ 0 ];
+		}),
+
+		"last": createPositionalPseudo(function( matchIndexes, length ) {
+			return [ length - 1 ];
+		}),
+
+		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			return [ argument < 0 ? argument + length : argument ];
+		}),
+
+		"even": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 0;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"odd": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 1;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ?
+				argument + length :
+				argument > length ?
+					length :
+					argument;
+			for ( ; --i >= 0; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ? argument + length : argument;
+			for ( ; ++i < length; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		})
+	}
+};
+
+Expr.pseudos["nth"] = Expr.pseudos["eq"];
+
+// Add button/input type pseudos
+for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
+	Expr.pseudos[ i ] = createInputPseudo( i );
+}
+for ( i in { submit: true, reset: true } ) {
+	Expr.pseudos[ i ] = createButtonPseudo( i );
+}
+
+// Easy API for creating new setFilters
+function setFilters() {}
+setFilters.prototype = Expr.filters = Expr.pseudos;
+Expr.setFilters = new setFilters();
+
+tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
+	var matched, match, tokens, type,
+		soFar, groups, preFilters,
+		cached = tokenCache[ selector + " " ];
+
+	if ( cached ) {
+		return parseOnly ? 0 : cached.slice( 0 );
+	}
+
+	soFar = selector;
+	groups = [];
+	preFilters = Expr.preFilter;
+
+	while ( soFar ) {
+
+		// Comma and first run
+		if ( !matched || (match = rcomma.exec( soFar )) ) {
+			if ( match ) {
+				// Don't consume trailing commas as valid
+				soFar = soFar.slice( match[0].length ) || soFar;
+			}
+			groups.push( (tokens = []) );
+		}
+
+		matched = false;
+
+		// Combinators
+		if ( (match = rcombinators.exec( soFar )) ) {
+			matched = match.shift();
+			tokens.push({
+				value: matched,
+				// Cast descendant combinators to space
+				type: match[0].replace( rtrim, " " )
+			});
+			soFar = soFar.slice( matched.length );
+		}
+
+		// Filters
+		for ( type in Expr.filter ) {
+			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
+				(match = preFilters[ type ]( match ))) ) {
+				matched = match.shift();
+				tokens.push({
+					value: matched,
+					type: type,
+					matches: match
+				});
+				soFar = soFar.slice( matched.length );
+			}
+		}
+
+		if ( !matched ) {
+			break;
+		}
+	}
+
+	// Return the length of the invalid excess
+	// if we're just parsing
+	// Otherwise, throw an error or return tokens
+	return parseOnly ?
+		soFar.length :
+		soFar ?
+			Sizzle.error( selector ) :
+			// Cache the tokens
+			tokenCache( selector, groups ).slice( 0 );
+};
+
+function toSelector( tokens ) {
+	var i = 0,
+		len = tokens.length,
+		selector = "";
+	for ( ; i < len; i++ ) {
+		selector += tokens[i].value;
+	}
+	return selector;
+}
+
+function addCombinator( matcher, combinator, base ) {
+	var dir = combinator.dir,
+		skip = combinator.next,
+		key = skip || dir,
+		checkNonElements = base && key === "parentNode",
+		doneName = done++;
+
+	return combinator.first ?
+		// Check against closest ancestor/preceding element
+		function( elem, context, xml ) {
+			while ( (elem = elem[ dir ]) ) {
+				if ( elem.nodeType === 1 || checkNonElements ) {
+					return matcher( elem, context, xml );
+				}
+			}
+			return false;
+		} :
+
+		// Check against all ancestor/preceding elements
+		function( elem, context, xml ) {
+			var oldCache, uniqueCache, outerCache,
+				newCache = [ dirruns, doneName ];
+
+			// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching
+			if ( xml ) {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						if ( matcher( elem, context, xml ) ) {
+							return true;
+						}
+					}
+				}
+			} else {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						outerCache = elem[ expando ] || (elem[ expando ] = {});
+
+						// Support: IE <9 only
+						// Defend against cloned attroperties (jQuery gh-1709)
+						uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
+
+						if ( skip && skip === elem.nodeName.toLowerCase() ) {
+							elem = elem[ dir ] || elem;
+						} else if ( (oldCache = uniqueCache[ key ]) &&
+							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
+
+							// Assign to newCache so results back-propagate to previous elements
+							return (newCache[ 2 ] = oldCache[ 2 ]);
+						} else {
+							// Reuse newcache so results back-propagate to previous elements
+							uniqueCache[ key ] = newCache;
+
+							// A match means we're done; a fail means we have to keep checking
+							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
+								return true;
+							}
+						}
+					}
+				}
+			}
+			return false;
+		};
+}
+
+function elementMatcher( matchers ) {
+	return matchers.length > 1 ?
+		function( elem, context, xml ) {
+			var i = matchers.length;
+			while ( i-- ) {
+				if ( !matchers[i]( elem, context, xml ) ) {
+					return false;
+				}
+			}
+			return true;
+		} :
+		matchers[0];
+}
+
+function multipleContexts( selector, contexts, results ) {
+	var i = 0,
+		len = contexts.length;
+	for ( ; i < len; i++ ) {
+		Sizzle( selector, contexts[i], results );
+	}
+	return results;
+}
+
+function condense( unmatched, map, filter, context, xml ) {
+	var elem,
+		newUnmatched = [],
+		i = 0,
+		len = unmatched.length,
+		mapped = map != null;
+
+	for ( ; i < len; i++ ) {
+		if ( (elem = unmatched[i]) ) {
+			if ( !filter || filter( elem, context, xml ) ) {
+				newUnmatched.push( elem );
+				if ( mapped ) {
+					map.push( i );
+				}
+			}
+		}
+	}
+
+	return newUnmatched;
+}
+
+function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
+	if ( postFilter && !postFilter[ expando ] ) {
+		postFilter = setMatcher( postFilter );
+	}
+	if ( postFinder && !postFinder[ expando ] ) {
+		postFinder = setMatcher( postFinder, postSelector );
+	}
+	return markFunction(function( seed, results, context, xml ) {
+		var temp, i, elem,
+			preMap = [],
+			postMap = [],
+			preexisting = results.length,
+
+			// Get initial elements from seed or context
+			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
+
+			// Prefilter to get matcher input, preserving a map for seed-results synchronization
+			matcherIn = preFilter && ( seed || !selector ) ?
+				condense( elems, preMap, preFilter, context, xml ) :
+				elems,
+
+			matcherOut = matcher ?
+				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
+				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
+
+					// ...intermediate processing is necessary
+					[] :
+
+					// ...otherwise use results directly
+					results :
+				matcherIn;
+
+		// Find primary matches
+		if ( matcher ) {
+			matcher( matcherIn, matcherOut, context, xml );
+		}
+
+		// Apply postFilter
+		if ( postFilter ) {
+			temp = condense( matcherOut, postMap );
+			postFilter( temp, [], context, xml );
+
+			// Un-match failing elements by moving them back to matcherIn
+			i = temp.length;
+			while ( i-- ) {
+				if ( (elem = temp[i]) ) {
+					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
+				}
+			}
+		}
+
+		if ( seed ) {
+			if ( postFinder || preFilter ) {
+				if ( postFinder ) {
+					// Get the final matcherOut by condensing this intermediate into postFinder contexts
+					temp = [];
+					i = matcherOut.length;
+					while ( i-- ) {
+						if ( (elem = matcherOut[i]) ) {
+							// Restore matcherIn since elem is not yet a final match
+							temp.push( (matcherIn[i] = elem) );
+						}
+					}
+					postFinder( null, (matcherOut = []), temp, xml );
+				}
+
+				// Move matched elements from seed to results to keep them synchronized
+				i = matcherOut.length;
+				while ( i-- ) {
+					if ( (elem = matcherOut[i]) &&
+						(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
+
+						seed[temp] = !(results[temp] = elem);
+					}
+				}
+			}
+
+		// Add elements to results, through postFinder if defined
+		} else {
+			matcherOut = condense(
+				matcherOut === results ?
+					matcherOut.splice( preexisting, matcherOut.length ) :
+					matcherOut
+			);
+			if ( postFinder ) {
+				postFinder( null, results, matcherOut, xml );
+			} else {
+				push.apply( results, matcherOut );
+			}
+		}
+	});
+}
+
+function matcherFromTokens( tokens ) {
+	var checkContext, matcher, j,
+		len = tokens.length,
+		leadingRelative = Expr.relative[ tokens[0].type ],
+		implicitRelative = leadingRelative || Expr.relative[" "],
+		i = leadingRelative ? 1 : 0,
+
+		// The foundational matcher ensures that elements are reachable from top-level context(s)
+		matchContext = addCombinator( function( elem ) {
+			return elem === checkContext;
+		}, implicitRelative, true ),
+		matchAnyContext = addCombinator( function( elem ) {
+			return indexOf( checkContext, elem ) > -1;
+		}, implicitRelative, true ),
+		matchers = [ function( elem, context, xml ) {
+			var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
+				(checkContext = context).nodeType ?
+					matchContext( elem, context, xml ) :
+					matchAnyContext( elem, context, xml ) );
+			// Avoid hanging onto element (issue #299)
+			checkContext = null;
+			return ret;
+		} ];
+
+	for ( ; i < len; i++ ) {
+		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
+			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
+		} else {
+			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
+
+			// Return special upon seeing a positional matcher
+			if ( matcher[ expando ] ) {
+				// Find the next relative operator (if any) for proper handling
+				j = ++i;
+				for ( ; j < len; j++ ) {
+					if ( Expr.relative[ tokens[j].type ] ) {
+						break;
+					}
+				}
+				return setMatcher(
+					i > 1 && elementMatcher( matchers ),
+					i > 1 && toSelector(
+						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
+						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
+					).replace( rtrim, "$1" ),
+					matcher,
+					i < j && matcherFromTokens( tokens.slice( i, j ) ),
+					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
+					j < len && toSelector( tokens )
+				);
+			}
+			matchers.push( matcher );
+		}
+	}
+
+	return elementMatcher( matchers );
+}
+
+function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
+	var bySet = setMatchers.length > 0,
+		byElement = elementMatchers.length > 0,
+		superMatcher = function( seed, context, xml, results, outermost ) {
+			var elem, j, matcher,
+				matchedCount = 0,
+				i = "0",
+				unmatched = seed && [],
+				setMatched = [],
+				contextBackup = outermostContext,
+				// We must always have either seed elements or outermost context
+				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
+				// Use integer dirruns iff this is the outermost matcher
+				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
+				len = elems.length;
+
+			if ( outermost ) {
+				outermostContext = context === document || context || outermost;
+			}
+
+			// Add elements passing elementMatchers directly to results
+			// Support: IE<9, Safari
+			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
+			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
+				if ( byElement && elem ) {
+					j = 0;
+					if ( !context && elem.ownerDocument !== document ) {
+						setDocument( elem );
+						xml = !documentIsHTML;
+					}
+					while ( (matcher = elementMatchers[j++]) ) {
+						if ( matcher( elem, context || document, xml) ) {
+							results.push( elem );
+							break;
+						}
+					}
+					if ( outermost ) {
+						dirruns = dirrunsUnique;
+					}
+				}
+
+				// Track unmatched elements for set filters
+				if ( bySet ) {
+					// They will have gone through all possible matchers
+					if ( (elem = !matcher && elem) ) {
+						matchedCount--;
+					}
+
+					// Lengthen the array for every element, matched or not
+					if ( seed ) {
+						unmatched.push( elem );
+					}
+				}
+			}
+
+			// `i` is now the count of elements visited above, and adding it to `matchedCount`
+			// makes the latter nonnegative.
+			matchedCount += i;
+
+			// Apply set filters to unmatched elements
+			// NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`
+			// equals `i`), unless we didn't visit _any_ elements in the above loop because we have
+			// no element matchers and no seed.
+			// Incrementing an initially-string "0" `i` allows `i` to remain a string only in that
+			// case, which will result in a "00" `matchedCount` that differs from `i` but is also
+			// numerically zero.
+			if ( bySet && i !== matchedCount ) {
+				j = 0;
+				while ( (matcher = setMatchers[j++]) ) {
+					matcher( unmatched, setMatched, context, xml );
+				}
+
+				if ( seed ) {
+					// Reintegrate element matches to eliminate the need for sorting
+					if ( matchedCount > 0 ) {
+						while ( i-- ) {
+							if ( !(unmatched[i] || setMatched[i]) ) {
+								setMatched[i] = pop.call( results );
+							}
+						}
+					}
+
+					// Discard index placeholder values to get only actual matches
+					setMatched = condense( setMatched );
+				}
+
+				// Add matches to results
+				push.apply( results, setMatched );
+
+				// Seedless set matches succeeding multiple successful matchers stipulate sorting
+				if ( outermost && !seed && setMatched.length > 0 &&
+					( matchedCount + setMatchers.length ) > 1 ) {
+
+					Sizzle.uniqueSort( results );
+				}
+			}
+
+			// Override manipulation of globals by nested matchers
+			if ( outermost ) {
+				dirruns = dirrunsUnique;
+				outermostContext = contextBackup;
+			}
+
+			return unmatched;
+		};
+
+	return bySet ?
+		markFunction( superMatcher ) :
+		superMatcher;
+}
+
+compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
+	var i,
+		setMatchers = [],
+		elementMatchers = [],
+		cached = compilerCache[ selector + " " ];
+
+	if ( !cached ) {
+		// Generate a function of recursive functions that can be used to check each element
+		if ( !match ) {
+			match = tokenize( selector );
+		}
+		i = match.length;
+		while ( i-- ) {
+			cached = matcherFromTokens( match[i] );
+			if ( cached[ expando ] ) {
+				setMatchers.push( cached );
+			} else {
+				elementMatchers.push( cached );
+			}
+		}
+
+		// Cache the compiled function
+		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
+
+		// Save selector and tokenization
+		cached.selector = selector;
+	}
+	return cached;
+};
+
+/**
+ * A low-level selection function that works with Sizzle's compiled
+ *  selector functions
+ * @param {String|Function} selector A selector or a pre-compiled
+ *  selector function built with Sizzle.compile
+ * @param {Element} context
+ * @param {Array} [results]
+ * @param {Array} [seed] A set of elements to match against
+ */
+select = Sizzle.select = function( selector, context, results, seed ) {
+	var i, tokens, token, type, find,
+		compiled = typeof selector === "function" && selector,
+		match = !seed && tokenize( (selector = compiled.selector || selector) );
+
+	results = results || [];
+
+	// Try to minimize operations if there is only one selector in the list and no seed
+	// (the latter of which guarantees us context)
+	if ( match.length === 1 ) {
+
+		// Reduce context if the leading compound selector is an ID
+		tokens = match[0] = match[0].slice( 0 );
+		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
+				context.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[1].type ] ) {
+
+			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
+			if ( !context ) {
+				return results;
+
+			// Precompiled matchers will still verify ancestry, so step up a level
+			} else if ( compiled ) {
+				context = context.parentNode;
+			}
+
+			selector = selector.slice( tokens.shift().value.length );
+		}
+
+		// Fetch a seed set for right-to-left matching
+		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
+		while ( i-- ) {
+			token = tokens[i];
+
+			// Abort if we hit a combinator
+			if ( Expr.relative[ (type = token.type) ] ) {
+				break;
+			}
+			if ( (find = Expr.find[ type ]) ) {
+				// Search, expanding context for leading sibling combinators
+				if ( (seed = find(
+					token.matches[0].replace( runescape, funescape ),
+					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
+				)) ) {
+
+					// If seed is empty or no tokens remain, we can return early
+					tokens.splice( i, 1 );
+					selector = seed.length && toSelector( tokens );
+					if ( !selector ) {
+						push.apply( results, seed );
+						return results;
+					}
+
+					break;
+				}
+			}
+		}
+	}
+
+	// Compile and execute a filtering function if one is not provided
+	// Provide `match` to avoid retokenization if we modified the selector above
+	( compiled || compile( selector, match ) )(
+		seed,
+		context,
+		!documentIsHTML,
+		results,
+		!context || rsibling.test( selector ) && testContext( context.parentNode ) || context
+	);
+	return results;
+};
+
+// One-time assignments
+
+// Sort stability
+support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
+
+// Support: Chrome 14-35+
+// Always assume duplicates if they aren't passed to the comparison function
+support.detectDuplicates = !!hasDuplicate;
+
+// Initialize against the default document
+setDocument();
+
+// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
+// Detached nodes confoundingly follow *each other*
+support.sortDetached = assert(function( el ) {
+	// Should return 1, but returns 4 (following)
+	return el.compareDocumentPosition( document.createElement("fieldset") ) & 1;
+});
+
+// Support: IE<8
+// Prevent attribute/property "interpolation"
+// https://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
+if ( !assert(function( el ) {
+	el.innerHTML = "<a href='#'></a>";
+	return el.firstChild.getAttribute("href") === "#" ;
+}) ) {
+	addHandle( "type|href|height|width", function( elem, name, isXML ) {
+		if ( !isXML ) {
+			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
+		}
+	});
+}
+
+// Support: IE<9
+// Use defaultValue in place of getAttribute("value")
+if ( !support.attributes || !assert(function( el ) {
+	el.innerHTML = "<input/>";
+	el.firstChild.setAttribute( "value", "" );
+	return el.firstChild.getAttribute( "value" ) === "";
+}) ) {
+	addHandle( "value", function( elem, name, isXML ) {
+		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
+			return elem.defaultValue;
+		}
+	});
+}
+
+// Support: IE<9
+// Use getAttributeNode to fetch booleans when getAttribute lies
+if ( !assert(function( el ) {
+	return el.getAttribute("disabled") == null;
+}) ) {
+	addHandle( booleans, function( elem, name, isXML ) {
+		var val;
+		if ( !isXML ) {
+			return elem[ name ] === true ? name.toLowerCase() :
+					(val = elem.getAttributeNode( name )) && val.specified ?
+					val.value :
+				null;
+		}
+	});
+}
+
+return Sizzle;
+
+})( window );
+
+
+
+jQuery.find = Sizzle;
+jQuery.expr = Sizzle.selectors;
+
+// Deprecated
+jQuery.expr[ ":" ] = jQuery.expr.pseudos;
+jQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;
+jQuery.text = Sizzle.getText;
+jQuery.isXMLDoc = Sizzle.isXML;
+jQuery.contains = Sizzle.contains;
+jQuery.escapeSelector = Sizzle.escape;
+
+
+
+
+var dir = function( elem, dir, until ) {
+	var matched = [],
+		truncate = until !== undefined;
+
+	while ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {
+		if ( elem.nodeType === 1 ) {
+			if ( truncate && jQuery( elem ).is( until ) ) {
+				break;
+			}
+			matched.push( elem );
+		}
+	}
+	return matched;
+};
+
+
+var siblings = function( n, elem ) {
+	var matched = [];
+
+	for ( ; n; n = n.nextSibling ) {
+		if ( n.nodeType === 1 && n !== elem ) {
+			matched.push( n );
+		}
+	}
+
+	return matched;
+};
+
+
+var rneedsContext = jQuery.expr.match.needsContext;
+
+
+
+function nodeName( elem, name ) {
+
+  return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
+
+};
+var rsingleTag = ( /^<([a-z][^\/\0>:\x20\t\r\n\f]*)[\x20\t\r\n\f]*\/?>(?:<\/\1>|)$/i );
+
+
+
+// Implement the identical functionality for filter and not
+function winnow( elements, qualifier, not ) {
+	if ( isFunction( qualifier ) ) {
+		return jQuery.grep( elements, function( elem, i ) {
+			return !!qualifier.call( elem, i, elem ) !== not;
+		} );
+	}
+
+	// Single element
+	if ( qualifier.nodeType ) {
+		return jQuery.grep( elements, function( elem ) {
+			return ( elem === qualifier ) !== not;
+		} );
+	}
+
+	// Arraylike of elements (jQuery, arguments, Array)
+	if ( typeof qualifier !== "string" ) {
+		return jQuery.grep( elements, function( elem ) {
+			return ( indexOf.call( qualifier, elem ) > -1 ) !== not;
+		} );
+	}
+
+	// Filtered directly for both simple and complex selectors
+	return jQuery.filter( qualifier, elements, not );
+}
+
+jQuery.filter = function( expr, elems, not ) {
+	var elem = elems[ 0 ];
+
+	if ( not ) {
+		expr = ":not(" + expr + ")";
+	}
+
+	if ( elems.length === 1 && elem.nodeType === 1 ) {
+		return jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [];
+	}
+
+	return jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
+		return elem.nodeType === 1;
+	} ) );
+};
+
+jQuery.fn.extend( {
+	find: function( selector ) {
+		var i, ret,
+			len = this.length,
+			self = this;
+
+		if ( typeof selector !== "string" ) {
+			return this.pushStack( jQuery( selector ).filter( function() {
+				for ( i = 0; i < len; i++ ) {
+					if ( jQuery.contains( self[ i ], this ) ) {
+						return true;
+					}
+				}
+			} ) );
+		}
+
+		ret = this.pushStack( [] );
+
+		for ( i = 0; i < len; i++ ) {
+			jQuery.find( selector, self[ i ], ret );
+		}
+
+		return len > 1 ? jQuery.uniqueSort( ret ) : ret;
+	},
+	filter: function( selector ) {
+		return this.pushStack( winnow( this, selector || [], false ) );
+	},
+	not: function( selector ) {
+		return this.pushStack( winnow( this, selector || [], true ) );
+	},
+	is: function( selector ) {
+		return !!winnow(
+			this,
+
+			// If this is a positional/relative selector, check membership in the returned set
+			// so $("p:first").is("p:last") won't return true for a doc with two "p".
+			typeof selector === "string" && rneedsContext.test( selector ) ?
+				jQuery( selector ) :
+				selector || [],
+			false
+		).length;
+	}
+} );
+
+
+// Initialize a jQuery object
+
+
+// A central reference to the root jQuery(document)
+var rootjQuery,
+
+	// A simple way to check for HTML strings
+	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
+	// Strict HTML recognition (#11290: must start with <)
+	// Shortcut simple #id case for speed
+	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]+))$/,
+
+	init = jQuery.fn.init = function( selector, context, root ) {
+		var match, elem;
+
+		// HANDLE: $(""), $(null), $(undefined), $(false)
+		if ( !selector ) {
+			return this;
+		}
+
+		// Method init() accepts an alternate rootjQuery
+		// so migrate can support jQuery.sub (gh-2101)
+		root = root || rootjQuery;
+
+		// Handle HTML strings
+		if ( typeof selector === "string" ) {
+			if ( selector[ 0 ] === "<" &&
+				selector[ selector.length - 1 ] === ">" &&
+				selector.length >= 3 ) {
+
+				// Assume that strings that start and end with <> are HTML and skip the regex check
+				match = [ null, selector, null ];
+
+			} else {
+				match = rquickExpr.exec( selector );
+			}
+
+			// Match html or make sure no context is specified for #id
+			if ( match && ( match[ 1 ] || !context ) ) {
+
+				// HANDLE: $(html) -> $(array)
+				if ( match[ 1 ] ) {
+					context = context instanceof jQuery ? context[ 0 ] : context;
+
+					// Option to run scripts is true for back-compat
+					// Intentionally let the error be thrown if parseHTML is not present
+					jQuery.merge( this, jQuery.parseHTML(
+						match[ 1 ],
+						context && context.nodeType ? context.ownerDocument || context : document,
+						true
+					) );
+
+					// HANDLE: $(html, props)
+					if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
+						for ( match in context ) {
+
+							// Properties of context are called as methods if possible
+							if ( isFunction( this[ match ] ) ) {
+								this[ match ]( context[ match ] );
+
+							// ...and otherwise set as attributes
+							} else {
+								this.attr( match, context[ match ] );
+							}
+						}
+					}
+
+					return this;
+
+				// HANDLE: $(#id)
+				} else {
+					elem = document.getElementById( match[ 2 ] );
+
+					if ( elem ) {
+
+						// Inject the element directly into the jQuery object
+						this[ 0 ] = elem;
+						this.length = 1;
+					}
+					return this;
+				}
+
+			// HANDLE: $(expr, $(...))
+			} else if ( !context || context.jquery ) {
+				return ( context || root ).find( selector );
+
+			// HANDLE: $(expr, context)
+			// (which is just equivalent to: $(context).find(expr)
+			} else {
+				return this.constructor( context ).find( selector );
+			}
+
+		// HANDLE: $(DOMElement)
+		} else if ( selector.nodeType ) {
+			this[ 0 ] = selector;
+			this.length = 1;
+			return this;
+
+		// HANDLE: $(function)
+		// Shortcut for document ready
+		} else if ( isFunction( selector ) ) {
+			return root.ready !== undefined ?
+				root.ready( selector ) :
+
+				// Execute immediately if ready is not present
+				selector( jQuery );
+		}
+
+		return jQuery.makeArray( selector, this );
+	};
+
+// Give the init function the jQuery prototype for later instantiation
+init.prototype = jQuery.fn;
+
+// Initialize central reference
+rootjQuery = jQuery( document );
+
+
+var rparentsprev = /^(?:parents|prev(?:Until|All))/,
+
+	// Methods guaranteed to produce a unique set when starting from a unique set
+	guaranteedUnique = {
+		children: true,
+		contents: true,
+		next: true,
+		prev: true
+	};
+
+jQuery.fn.extend( {
+	has: function( target ) {
+		var targets = jQuery( target, this ),
+			l = targets.length;
+
+		return this.filter( function() {
+			var i = 0;
+			for ( ; i < l; i++ ) {
+				if ( jQuery.contains( this, targets[ i ] ) ) {
+					return true;
+				}
+			}
+		} );
+	},
+
+	closest: function( selectors, context ) {
+		var cur,
+			i = 0,
+			l = this.length,
+			matched = [],
+			targets = typeof selectors !== "string" && jQuery( selectors );
+
+		// Positional selectors never match, since there's no _selection_ context
+		if ( !rneedsContext.test( selectors ) ) {
+			for ( ; i < l; i++ ) {
+				for ( cur = this[ i ]; cur && cur !== context; cur = cur.parentNode ) {
+
+					// Always skip document fragments
+					if ( cur.nodeType < 11 && ( targets ?
+						targets.index( cur ) > -1 :
+
+						// Don't pass non-elements to Sizzle
+						cur.nodeType === 1 &&
+							jQuery.find.matchesSelector( cur, selectors ) ) ) {
+
+						matched.push( cur );
+						break;
+					}
+				}
+			}
+		}
+
+		return this.pushStack( matched.length > 1 ? jQuery.uniqueSort( matched ) : matched );
+	},
+
+	// Determine the position of an element within the set
+	index: function( elem ) {
+
+		// No argument, return index in parent
+		if ( !elem ) {
+			return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
+		}
+
+		// Index in selector
+		if ( typeof elem === "string" ) {
+			return indexOf.call( jQuery( elem ), this[ 0 ] );
+		}
+
+		// Locate the position of the desired element
+		return indexOf.call( this,
+
+			// If it receives a jQuery object, the first element is used
+			elem.jquery ? elem[ 0 ] : elem
+		);
+	},
+
+	add: function( selector, context ) {
+		return this.pushStack(
+			jQuery.uniqueSort(
+				jQuery.merge( this.get(), jQuery( selector, context ) )
+			)
+		);
+	},
+
+	addBack: function( selector ) {
+		return this.add( selector == null ?
+			this.prevObject : this.prevObject.filter( selector )
+		);
+	}
+} );
+
+function sibling( cur, dir ) {
+	while ( ( cur = cur[ dir ] ) && cur.nodeType !== 1 ) {}
+	return cur;
+}
+
+jQuery.each( {
+	parent: function( elem ) {
+		var parent = elem.parentNode;
+		return parent && parent.nodeType !== 11 ? parent : null;
+	},
+	parents: function( elem ) {
+		return dir( elem, "parentNode" );
+	},
+	parentsUntil: function( elem, i, until ) {
+		return dir( elem, "parentNode", until );
+	},
+	next: function( elem ) {
+		return sibling( elem, "nextSibling" );
+	},
+	prev: function( elem ) {
+		return sibling( elem, "previousSibling" );
+	},
+	nextAll: function( elem ) {
+		return dir( elem, "nextSibling" );
+	},
+	prevAll: function( elem ) {
+		return dir( elem, "previousSibling" );
+	},
+	nextUntil: function( elem, i, until ) {
+		return dir( elem, "nextSibling", until );
+	},
+	prevUntil: function( elem, i, until ) {
+		return dir( elem, "previousSibling", until );
+	},
+	siblings: function( elem ) {
+		return siblings( ( elem.parentNode || {} ).firstChild, elem );
+	},
+	children: function( elem ) {
+		return siblings( elem.firstChild );
+	},
+	contents: function( elem ) {
+		if ( typeof elem.contentDocument !== "undefined" ) {
+			return elem.contentDocument;
+		}
+
+		// Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
+		// Treat the template element as a regular one in browsers that
+		// don't support it.
+		if ( nodeName( elem, "template" ) ) {
+			elem = elem.content || elem;
+		}
+
+		return jQuery.merge( [], elem.childNodes );
+	}
+}, function( name, fn ) {
+	jQuery.fn[ name ] = function( until, selector ) {
+		var matched = jQuery.map( this, fn, until );
+
+		if ( name.slice( -5 ) !== "Until" ) {
+			selector = until;
+		}
+
+		if ( selector && typeof selector === "string" ) {
+			matched = jQuery.filter( selector, matched );
+		}
+
+		if ( this.length > 1 ) {
+
+			// Remove duplicates
+			if ( !guaranteedUnique[ name ] ) {
+				jQuery.uniqueSort( matched );
+			}
+
+			// Reverse order for parents* and prev-derivatives
+			if ( rparentsprev.test( name ) ) {
+				matched.reverse();
+			}
+		}
+
+		return this.pushStack( matched );
+	};
+} );
+var rnothtmlwhite = ( /[^\x20\t\r\n\f]+/g );
+
+
+
+// Convert String-formatted options into Object-formatted ones
+function createOptions( options ) {
+	var object = {};
+	jQuery.each( options.match( rnothtmlwhite ) || [], function( _, flag ) {
+		object[ flag ] = true;
+	} );
+	return object;
+}
+
+/*
+ * Create a callback list using the following parameters:
+ *
+ *	options: an optional list of space-separated options that will change how
+ *			the callback list behaves or a more traditional option object
+ *
+ * By default a callback list will act like an event callback list and can be
+ * "fired" multiple times.
+ *
+ * Possible options:
+ *
+ *	once:			will ensure the callback list can only be fired once (like a Deferred)
+ *
+ *	memory:			will keep track of previous values and will call any callback added
+ *					after the list has been fired right away with the latest "memorized"
+ *					values (like a Deferred)
+ *
+ *	unique:			will ensure a callback can only be added once (no duplicate in the list)
+ *
+ *	stopOnFalse:	interrupt callings when a callback returns false
+ *
+ */
+jQuery.Callbacks = function( options ) {
+
+	// Convert options from String-formatted to Object-formatted if needed
+	// (we check in cache first)
+	options = typeof options === "string" ?
+		createOptions( options ) :
+		jQuery.extend( {}, options );
+
+	var // Flag to know if list is currently firing
+		firing,
+
+		// Last fire value for non-forgettable lists
+		memory,
+
+		// Flag to know if list was already fired
+		fired,
+
+		// Flag to prevent firing
+		locked,
+
+		// Actual callback list
+		list = [],
+
+		// Queue of execution data for repeatable lists
+		queue = [],
+
+		// Index of currently firing callback (modified by add/remove as needed)
+		firingIndex = -1,
+
+		// Fire callbacks
+		fire = function() {
+
+			// Enforce single-firing
+			locked = locked || options.once;
+
+			// Execute callbacks for all pending executions,
+			// respecting firingIndex overrides and runtime changes
+			fired = firing = true;
+			for ( ; queue.length; firingIndex = -1 ) {
+				memory = queue.shift();
+				while ( ++firingIndex < list.length ) {
+
+					// Run callback and check for early termination
+					if ( list[ firingIndex ].apply( memory[ 0 ], memory[ 1 ] ) === false &&
+						options.stopOnFalse ) {
+
+						// Jump to end and forget the data so .add doesn't re-fire
+						firingIndex = list.length;
+						memory = false;
+					}
+				}
+			}
+
+			// Forget the data if we're done with it
+			if ( !options.memory ) {
+				memory = false;
+			}
+
+			firing = false;
+
+			// Clean up if we're done firing for good
+			if ( locked ) {
+
+				// Keep an empty list if we have data for future add calls
+				if ( memory ) {
+					list = [];
+
+				// Otherwise, this object is spent
+				} else {
+					list = "";
+				}
+			}
+		},
+
+		// Actual Callbacks object
+		self = {
+
+			// Add a callback or a collection of callbacks to the list
+			add: function() {
+				if ( list ) {
+
+					// If we have memory from a past run, we should fire after adding
+					if ( memory && !firing ) {
+						firingIndex = list.length - 1;
+						queue.push( memory );
+					}
+
+					( function add( args ) {
+						jQuery.each( args, function( _, arg ) {
+							if ( isFunction( arg ) ) {
+								if ( !options.unique || !self.has( arg ) ) {
+									list.push( arg );
+								}
+							} else if ( arg && arg.length && toType( arg ) !== "string" ) {
+
+								// Inspect recursively
+								add( arg );
+							}
+						} );
+					} )( arguments );
+
+					if ( memory && !firing ) {
+						fire();
+					}
+				}
+				return this;
+			},
+
+			// Remove a callback from the list
+			remove: function() {
+				jQuery.each( arguments, function( _, arg ) {
+					var index;
+					while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
+						list.splice( index, 1 );
+
+						// Handle firing indexes
+						if ( index <= firingIndex ) {
+							firingIndex--;
+						}
+					}
+				} );
+				return this;
+			},
+
+			// Check if a given callback is in the list.
+			// If no argument is given, return whether or not list has callbacks attached.
+			has: function( fn ) {
+				return fn ?
+					jQuery.inArray( fn, list ) > -1 :
+					list.length > 0;
+			},
+
+			// Remove all callbacks from the list
+			empty: function() {
+				if ( list ) {
+					list = [];
+				}
+				return this;
+			},
+
+			// Disable .fire and .add
+			// Abort any current/pending executions
+			// Clear all callbacks and values
+			disable: function() {
+				locked = queue = [];
+				list = memory = "";
+				return this;
+			},
+			disabled: function() {
+				return !list;
+			},
+
+			// Disable .fire
+			// Also disable .add unless we have memory (since it would have no effect)
+			// Abort any pending executions
+			lock: function() {
+				locked = queue = [];
+				if ( !memory && !firing ) {
+					list = memory = "";
+				}
+				return this;
+			},
+			locked: function() {
+				return !!locked;
+			},
+
+			// Call all callbacks with the given context and arguments
+			fireWith: function( context, args ) {
+				if ( !locked ) {
+					args = args || [];
+					args = [ context, args.slice ? args.slice() : args ];
+					queue.push( args );
+					if ( !firing ) {
+						fire();
+					}
+				}
+				return this;
+			},
+
+			// Call all the callbacks with the given arguments
+			fire: function() {
+				self.fireWith( this, arguments );
+				return this;
+			},
+
+			// To know if the callbacks have already been called at least once
+			fired: function() {
+				return !!fired;
+			}
+		};
+
+	return self;
+};
+
+
+function Identity( v ) {
+	return v;
+}
+function Thrower( ex ) {
+	throw ex;
+}
+
+function adoptValue( value, resolve, reject, noValue ) {
+	var method;
+
+	try {
+
+		// Check for promise aspect first to privilege synchronous behavior
+		if ( value && isFunction( ( method = value.promise ) ) ) {
+			method.call( value ).done( resolve ).fail( reject );
+
+		// Other thenables
+		} else if ( value && isFunction( ( method = value.then ) ) ) {
+			method.call( value, resolve, reject );
+
+		// Other non-thenables
+		} else {
+
+			// Control `resolve` arguments by letting Array#slice cast boolean `noValue` to integer:
+			// * false: [ value ].slice( 0 ) => resolve( value )
+			// * true: [ value ].slice( 1 ) => resolve()
+			resolve.apply( undefined, [ value ].slice( noValue ) );
+		}
+
+	// For Promises/A+, convert exceptions into rejections
+	// Since jQuery.when doesn't unwrap thenables, we can skip the extra checks appearing in
+	// Deferred#then to conditionally suppress rejection.
+	} catch ( value ) {
+
+		// Support: Android 4.0 only
+		// Strict mode functions invoked without .call/.apply get global-object context
+		reject.apply( undefined, [ value ] );
+	}
+}
+
+jQuery.extend( {
+
+	Deferred: function( func ) {
+		var tuples = [
+
+				// action, add listener, callbacks,
+				// ... .then handlers, argument index, [final state]
+				[ "notify", "progress", jQuery.Callbacks( "memory" ),
+					jQuery.Callbacks( "memory" ), 2 ],
+				[ "resolve", "done", jQuery.Callbacks( "once memory" ),
+					jQuery.Callbacks( "once memory" ), 0, "resolved" ],
+				[ "reject", "fail", jQuery.Callbacks( "once memory" ),
+					jQuery.Callbacks( "once memory" ), 1, "rejected" ]
+			],
+			state = "pending",
+			promise = {
+				state: function() {
+					return state;
+				},
+				always: function() {
+					deferred.done( arguments ).fail( arguments );
+					return this;
+				},
+				"catch": function( fn ) {
+					return promise.then( null, fn );
+				},
+
+				// Keep pipe for back-compat
+				pipe: function( /* fnDone, fnFail, fnProgress */ ) {
+					var fns = arguments;
+
+					return jQuery.Deferred( function( newDefer ) {
+						jQuery.each( tuples, function( i, tuple ) {
+
+							// Map tuples (progress, done, fail) to arguments (done, fail, progress)
+							var fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];
+
+							// deferred.progress(function() { bind to newDefer or newDefer.notify })
+							// deferred.done(function() { bind to newDefer or newDefer.resolve })
+							// deferred.fail(function() { bind to newDefer or newDefer.reject })
+							deferred[ tuple[ 1 ] ]( function() {
+								var returned = fn && fn.apply( this, arguments );
+								if ( returned && isFunction( returned.promise ) ) {
+									returned.promise()
+										.progress( newDefer.notify )
+										.done( newDefer.resolve )
+										.fail( newDefer.reject );
+								} else {
+									newDefer[ tuple[ 0 ] + "With" ](
+										this,
+										fn ? [ returned ] : arguments
+									);
+								}
+							} );
+						} );
+						fns = null;
+					} ).promise();
+				},
+				then: function( onFulfilled, onRejected, onProgress ) {
+					var maxDepth = 0;
+					function resolve( depth, deferred, handler, special ) {
+						return function() {
+							var that = this,
+								args = arguments,
+								mightThrow = function() {
+									var returned, then;
+
+									// Support: Promises/A+ section 2.3.3.3.3
+									// https://promisesaplus.com/#point-59
+									// Ignore double-resolution attempts
+									if ( depth < maxDepth ) {
+										return;
+									}
+
+									returned = handler.apply( that, args );
+
+									// Support: Promises/A+ section 2.3.1
+									// https://promisesaplus.com/#point-48
+									if ( returned === deferred.promise() ) {
+										throw new TypeError( "Thenable self-resolution" );
+									}
+
+									// Support: Promises/A+ sections 2.3.3.1, 3.5
+									// https://promisesaplus.com/#point-54
+									// https://promisesaplus.com/#point-75
+									// Retrieve `then` only once
+									then = returned &&
+
+										// Support: Promises/A+ section 2.3.4
+										// https://promisesaplus.com/#point-64
+										// Only check objects and functions for thenability
+										( typeof returned === "object" ||
+											typeof returned === "function" ) &&
+										returned.then;
+
+									// Handle a returned thenable
+									if ( isFunction( then ) ) {
+
+										// Special processors (notify) just wait for resolution
+										if ( special ) {
+											then.call(
+												returned,
+												resolve( maxDepth, deferred, Identity, special ),
+												resolve( maxDepth, deferred, Thrower, special )
+											);
+
+										// Normal processors (resolve) also hook into progress
+										} else {
+
+											// ...and disregard older resolution values
+											maxDepth++;
+
+											then.call(
+												returned,
+												resolve( maxDepth, deferred, Identity, special ),
+												resolve( maxDepth, deferred, Thrower, special ),
+												resolve( maxDepth, deferred, Identity,
+													deferred.notifyWith )
+											);
+										}
+
+									// Handle all other returned values
+									} else {
+
+										// Only substitute handlers pass on context
+										// and multiple values (non-spec behavior)
+										if ( handler !== Identity ) {
+											that = undefined;
+											args = [ returned ];
+										}
+
+										// Process the value(s)
+										// Default process is resolve
+										( special || deferred.resolveWith )( that, args );
+									}
+								},
+
+								// Only normal processors (resolve) catch and reject exceptions
+								process = special ?
+									mightThrow :
+									function() {
+										try {
+											mightThrow();
+										} catch ( e ) {
+
+											if ( jQuery.Deferred.exceptionHook ) {
+												jQuery.Deferred.exceptionHook( e,
+													process.stackTrace );
+											}
+
+											// Support: Promises/A+ section 2.3.3.3.4.1
+											// https://promisesaplus.com/#point-61
+											// Ignore post-resolution exceptions
+											if ( depth + 1 >= maxDepth ) {
+
+												// Only substitute handlers pass on context
+												// and multiple values (non-spec behavior)
+												if ( handler !== Thrower ) {
+													that = undefined;
+													args = [ e ];
+												}
+
+												deferred.rejectWith( that, args );
+											}
+										}
+									};
+
+							// Support: Promises/A+ section 2.3.3.3.1
+							// https://promisesaplus.com/#point-57
+							// Re-resolve promises immediately to dodge false rejection from
+							// subsequent errors
+							if ( depth ) {
+								process();
+							} else {
+
+								// Call an optional hook to record the stack, in case of exception
+								// since it's otherwise lost when execution goes async
+								if ( jQuery.Deferred.getStackHook ) {
+									process.stackTrace = jQuery.Deferred.getStackHook();
+								}
+								window.setTimeout( process );
+							}
+						};
+					}
+
+					return jQuery.Deferred( function( newDefer ) {
+
+						// progress_handlers.add( ... )
+						tuples[ 0 ][ 3 ].add(
+							resolve(
+								0,
+								newDefer,
+								isFunction( onProgress ) ?
+									onProgress :
+									Identity,
+								newDefer.notifyWith
+							)
+						);
+
+						// fulfilled_handlers.add( ... )
+						tuples[ 1 ][ 3 ].add(
+							resolve(
+								0,
+								newDefer,
+								isFunction( onFulfilled ) ?
+									onFulfilled :
+									Identity
+							)
+						);
+
+						// rejected_handlers.add( ... )
+						tuples[ 2 ][ 3 ].add(
+							resolve(
+								0,
+								newDefer,
+								isFunction( onRejected ) ?
+									onRejected :
+									Thrower
+							)
+						);
+					} ).promise();
+				},
+
+				// Get a promise for this deferred
+				// If obj is provided, the promise aspect is added to the object
+				promise: function( obj ) {
+					return obj != null ? jQuery.extend( obj, promise ) : promise;
+				}
+			},
+			deferred = {};
+
+		// Add list-specific methods
+		jQuery.each( tuples, function( i, tuple ) {
+			var list = tuple[ 2 ],
+				stateString = tuple[ 5 ];
+
+			// promise.progress = list.add
+			// promise.done = list.add
+			// promise.fail = list.add
+			promise[ tuple[ 1 ] ] = list.add;
+
+			// Handle state
+			if ( stateString ) {
+				list.add(
+					function() {
+
+						// state = "resolved" (i.e., fulfilled)
+						// state = "rejected"
+						state = stateString;
+					},
+
+					// rejected_callbacks.disable
+					// fulfilled_callbacks.disable
+					tuples[ 3 - i ][ 2 ].disable,
+
+					// rejected_handlers.disable
+					// fulfilled_handlers.disable
+					tuples[ 3 - i ][ 3 ].disable,
+
+					// progress_callbacks.lock
+					tuples[ 0 ][ 2 ].lock,
+
+					// progress_handlers.lock
+					tuples[ 0 ][ 3 ].lock
+				);
+			}
+
+			// progress_handlers.fire
+			// fulfilled_handlers.fire
+			// rejected_handlers.fire
+			list.add( tuple[ 3 ].fire );
+
+			// deferred.notify = function() { deferred.notifyWith(...) }
+			// deferred.resolve = function() { deferred.resolveWith(...) }
+			// deferred.reject = function() { deferred.rejectWith(...) }
+			deferred[ tuple[ 0 ] ] = function() {
+				deferred[ tuple[ 0 ] + "With" ]( this === deferred ? undefined : this, arguments );
+				return this;
+			};
+
+			// deferred.notifyWith = list.fireWith
+			// deferred.resolveWith = list.fireWith
+			// deferred.rejectWith = list.fireWith
+			deferred[ tuple[ 0 ] + "With" ] = list.fireWith;
+		} );
+
+		// Make the deferred a promise
+		promise.promise( deferred );
+
+		// Call given func if any
+		if ( func ) {
+			func.call( deferred, deferred );
+		}
+
+		// All done!
+		return deferred;
+	},
+
+	// Deferred helper
+	when: function( singleValue ) {
+		var
+
+			// count of uncompleted subordinates
+			remaining = arguments.length,
+
+			// count of unprocessed arguments
+			i = remaining,
+
+			// subordinate fulfillment data
+			resolveContexts = Array( i ),
+			resolveValues = slice.call( arguments ),
+
+			// the master Deferred
+			master = jQuery.Deferred(),
+
+			// subordinate callback factory
+			updateFunc = function( i ) {
+				return function( value ) {
+					resolveContexts[ i ] = this;
+					resolveValues[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
+					if ( !( --remaining ) ) {
+						master.resolveWith( resolveContexts, resolveValues );
+					}
+				};
+			};
+
+		// Single- and empty arguments are adopted like Promise.resolve
+		if ( remaining <= 1 ) {
+			adoptValue( singleValue, master.done( updateFunc( i ) ).resolve, master.reject,
+				!remaining );
+
+			// Use .then() to unwrap secondary thenables (cf. gh-3000)
+			if ( master.state() === "pending" ||
+				isFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {
+
+				return master.then();
+			}
+		}
+
+		// Multiple arguments are aggregated like Promise.all array elements
+		while ( i-- ) {
+			adoptValue( resolveValues[ i ], updateFunc( i ), master.reject );
+		}
+
+		return master.promise();
+	}
+} );
+
+
+// These usually indicate a programmer mistake during development,
+// warn about them ASAP rather than swallowing them by default.
+var rerrorNames = /^(Eval|Internal|Range|Reference|Syntax|Type|URI)Error$/;
+
+jQuery.Deferred.exceptionHook = function( error, stack ) {
+
+	// Support: IE 8 - 9 only
+	// Console exists when dev tools are open, which can happen at any time
+	if ( window.console && window.console.warn && error && rerrorNames.test( error.name ) ) {
+		window.console.warn( "jQuery.Deferred exception: " + error.message, error.stack, stack );
+	}
+};
+
+
+
+
+jQuery.readyException = function( error ) {
+	window.setTimeout( function() {
+		throw error;
+	} );
+};
+
+
+
+
+// The deferred used on DOM ready
+var readyList = jQuery.Deferred();
+
+jQuery.fn.ready = function( fn ) {
+
+	readyList
+		.then( fn )
+
+		// Wrap jQuery.readyException in a function so that the lookup
+		// happens at the time of error handling instead of callback
+		// registration.
+		.catch( function( error ) {
+			jQuery.readyException( error );
+		} );
+
+	return this;
+};
+
+jQuery.extend( {
+
+	// Is the DOM ready to be used? Set to true once it occurs.
+	isReady: false,
+
+	// A counter to track how many items to wait for before
+	// the ready event fires. See #6781
+	readyWait: 1,
+
+	// Handle when the DOM is ready
+	ready: function( wait ) {
+
+		// Abort if there are pending holds or we're already ready
+		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
+			return;
+		}
+
+		// Remember that the DOM is ready
+		jQuery.isReady = true;
+
+		// If a normal DOM Ready event fired, decrement, and wait if need be
+		if ( wait !== true && --jQuery.readyWait > 0 ) {
+			return;
+		}
+
+		// If there are functions bound, to execute
+		readyList.resolveWith( document, [ jQuery ] );
+	}
+} );
+
+jQuery.ready.then = readyList.then;
+
+// The ready event handler and self cleanup method
+function completed() {
+	document.removeEventListener( "DOMContentLoaded", completed );
+	window.removeEventListener( "load", completed );
+	jQuery.ready();
+}
+
+// Catch cases where $(document).ready() is called
+// after the browser event has already occurred.
+// Support: IE <=9 - 10 only
+// Older IE sometimes signals "interactive" too soon
+if ( document.readyState === "complete" ||
+	( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
+
+	// Handle it asynchronously to allow scripts the opportunity to delay ready
+	window.setTimeout( jQuery.ready );
+
+} else {
+
+	// Use the handy event callback
+	document.addEventListener( "DOMContentLoaded", completed );
+
+	// A fallback to window.onload, that will always work
+	window.addEventListener( "load", completed );
+}
+
+
+
+
+// Multifunctional method to get and set values of a collection
+// The value/s can optionally be executed if it's a function
+var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
+	var i = 0,
+		len = elems.length,
+		bulk = key == null;
+
+	// Sets many values
+	if ( toType( key ) === "object" ) {
+		chainable = true;
+		for ( i in key ) {
+			access( elems, fn, i, key[ i ], true, emptyGet, raw );
+		}
+
+	// Sets one value
+	} else if ( value !== undefined ) {
+		chainable = true;
+
+		if ( !isFunction( value ) ) {
+			raw = true;
+		}
+
+		if ( bulk ) {
+
+			// Bulk operations run against the entire set
+			if ( raw ) {
+				fn.call( elems, value );
+				fn = null;
+
+			// ...except when executing function values
+			} else {
+				bulk = fn;
+				fn = function( elem, key, value ) {
+					return bulk.call( jQuery( elem ), value );
+				};
+			}
+		}
+
+		if ( fn ) {
+			for ( ; i < len; i++ ) {
+				fn(
+					elems[ i ], key, raw ?
+					value :
+					value.call( elems[ i ], i, fn( elems[ i ], key ) )
+				);
+			}
+		}
+	}
+
+	if ( chainable ) {
+		return elems;
+	}
+
+	// Gets
+	if ( bulk ) {
+		return fn.call( elems );
+	}
+
+	return len ? fn( elems[ 0 ], key ) : emptyGet;
+};
+
+
+// Matches dashed string for camelizing
+var rmsPrefix = /^-ms-/,
+	rdashAlpha = /-([a-z])/g;
+
+// Used by camelCase as callback to replace()
+function fcamelCase( all, letter ) {
+	return letter.toUpperCase();
+}
+
+// Convert dashed to camelCase; used by the css and data modules
+// Support: IE <=9 - 11, Edge 12 - 15
+// Microsoft forgot to hump their vendor prefix (#9572)
+function camelCase( string ) {
+	return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
+}
+var acceptData = function( owner ) {
+
+	// Accepts only:
+	//  - Node
+	//    - Node.ELEMENT_NODE
+	//    - Node.DOCUMENT_NODE
+	//  - Object
+	//    - Any
+	return owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );
+};
+
+
+
+
+function Data() {
+	this.expando = jQuery.expando + Data.uid++;
+}
+
+Data.uid = 1;
+
+Data.prototype = {
+
+	cache: function( owner ) {
+
+		// Check if the owner object already has a cache
+		var value = owner[ this.expando ];
+
+		// If not, create one
+		if ( !value ) {
+			value = {};
+
+			// We can accept data for non-element nodes in modern browsers,
+			// but we should not, see #8335.
+			// Always return an empty object.
+			if ( acceptData( owner ) ) {
+
+				// If it is a node unlikely to be stringify-ed or looped over
+				// use plain assignment
+				if ( owner.nodeType ) {
+					owner[ this.expando ] = value;
+
+				// Otherwise secure it in a non-enumerable property
+				// configurable must be true to allow the property to be
+				// deleted when data is removed
+				} else {
+					Object.defineProperty( owner, this.expando, {
+						value: value,
+						configurable: true
+					} );
+				}
+			}
+		}
+
+		return value;
+	},
+	set: function( owner, data, value ) {
+		var prop,
+			cache = this.cache( owner );
+
+		// Handle: [ owner, key, value ] args
+		// Always use camelCase key (gh-2257)
+		if ( typeof data === "string" ) {
+			cache[ camelCase( data ) ] = value;
+
+		// Handle: [ owner, { properties } ] args
+		} else {
+
+			// Copy the properties one-by-one to the cache object
+			for ( prop in data ) {
+				cache[ camelCase( prop ) ] = data[ prop ];
+			}
+		}
+		return cache;
+	},
+	get: function( owner, key ) {
+		return key === undefined ?
+			this.cache( owner ) :
+
+			// Always use camelCase key (gh-2257)
+			owner[ this.expando ] && owner[ this.expando ][ camelCase( key ) ];
+	},
+	access: function( owner, key, value ) {
+
+		// In cases where either:
+		//
+		//   1. No key was specified
+		//   2. A string key was specified, but no value provided
+		//
+		// Take the "read" path and allow the get method to determine
+		// which value to return, respectively either:
+		//
+		//   1. The entire cache object
+		//   2. The data stored at the key
+		//
+		if ( key === undefined ||
+				( ( key && typeof key === "string" ) && value === undefined ) ) {
+
+			return this.get( owner, key );
+		}
+
+		// When the key is not a string, or both a key and value
+		// are specified, set or extend (existing objects) with either:
+		//
+		//   1. An object of properties
+		//   2. A key and value
+		//
+		this.set( owner, key, value );
+
+		// Since the "set" path can have two possible entry points
+		// return the expected data based on which path was taken[*]
+		return value !== undefined ? value : key;
+	},
+	remove: function( owner, key ) {
+		var i,
+			cache = owner[ this.expando ];
+
+		if ( cache === undefined ) {
+			return;
+		}
+
+		if ( key !== undefined ) {
+
+			// Support array or space separated string of keys
+			if ( Array.isArray( key ) ) {
+
+				// If key is an array of keys...
+				// We always set camelCase keys, so remove that.
+				key = key.map( camelCase );
+			} else {
+				key = camelCase( key );
+
+				// If a key with the spaces exists, use it.
+				// Otherwise, create an array by matching non-whitespace
+				key = key in cache ?
+					[ key ] :
+					( key.match( rnothtmlwhite ) || [] );
+			}
+
+			i = key.length;
+
+			while ( i-- ) {
+				delete cache[ key[ i ] ];
+			}
+		}
+
+		// Remove the expando if there's no more data
+		if ( key === undefined || jQuery.isEmptyObject( cache ) ) {
+
+			// Support: Chrome <=35 - 45
+			// Webkit & Blink performance suffers when deleting properties
+			// from DOM nodes, so set to undefined instead
+			// https://bugs.chromium.org/p/chromium/issues/detail?id=378607 (bug restricted)
+			if ( owner.nodeType ) {
+				owner[ this.expando ] = undefined;
+			} else {
+				delete owner[ this.expando ];
+			}
+		}
+	},
+	hasData: function( owner ) {
+		var cache = owner[ this.expando ];
+		return cache !== undefined && !jQuery.isEmptyObject( cache );
+	}
+};
+var dataPriv = new Data();
+
+var dataUser = new Data();
+
+
+
+//	Implementation Summary
+//
+//	1. Enforce API surface and semantic compatibility with 1.9.x branch
+//	2. Improve the module's maintainability by reducing the storage
+//		paths to a single mechanism.
+//	3. Use the same single mechanism to support "private" and "user" data.
+//	4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
+//	5. Avoid exposing implementation details on user objects (eg. expando properties)
+//	6. Provide a clear path for implementation upgrade to WeakMap in 2014
+
+var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
+	rmultiDash = /[A-Z]/g;
+
+function getData( data ) {
+	if ( data === "true" ) {
+		return true;
+	}
+
+	if ( data === "false" ) {
+		return false;
+	}
+
+	if ( data === "null" ) {
+		return null;
+	}
+
+	// Only convert to a number if it doesn't change the string
+	if ( data === +data + "" ) {
+		return +data;
+	}
+
+	if ( rbrace.test( data ) ) {
+		return JSON.parse( data );
+	}
+
+	return data;
+}
+
+function dataAttr( elem, key, data ) {
+	var name;
+
+	// If nothing was found internally, try to fetch any
+	// data from the HTML5 data-* attribute
+	if ( data === undefined && elem.nodeType === 1 ) {
+		name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase();
+		data = elem.getAttribute( name );
+
+		if ( typeof data === "string" ) {
+			try {
+				data = getData( data );
+			} catch ( e ) {}
+
+			// Make sure we set the data so it isn't changed later
+			dataUser.set( elem, key, data );
+		} else {
+			data = undefined;
+		}
+	}
+	return data;
+}
+
+jQuery.extend( {
+	hasData: function( elem ) {
+		return dataUser.hasData( elem ) || dataPriv.hasData( elem );
+	},
+
+	data: function( elem, name, data ) {
+		return dataUser.access( elem, name, data );
+	},
+
+	removeData: function( elem, name ) {
+		dataUser.remove( elem, name );
+	},
+
+	// TODO: Now that all calls to _data and _removeData have been replaced
+	// with direct calls to dataPriv methods, these can be deprecated.
+	_data: function( elem, name, data ) {
+		return dataPriv.access( elem, name, data );
+	},
+
+	_removeData: function( elem, name ) {
+		dataPriv.remove( elem, name );
+	}
+} );
+
+jQuery.fn.extend( {
+	data: function( key, value ) {
+		var i, name, data,
+			elem = this[ 0 ],
+			attrs = elem && elem.attributes;
+
+		// Gets all values
+		if ( key === undefined ) {
+			if ( this.length ) {
+				data = dataUser.get( elem );
+
+				if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
+					i = attrs.length;
+					while ( i-- ) {
+
+						// Support: IE 11 only
+						// The attrs elements can be null (#14894)
+						if ( attrs[ i ] ) {
+							name = attrs[ i ].name;
+							if ( name.indexOf( "data-" ) === 0 ) {
+								name = camelCase( name.slice( 5 ) );
+								dataAttr( elem, name, data[ name ] );
+							}
+						}
+					}
+					dataPriv.set( elem, "hasDataAttrs", true );
+				}
+			}
+
+			return data;
+		}
+
+		// Sets multiple values
+		if ( typeof key === "object" ) {
+			return this.each( function() {
+				dataUser.set( this, key );
+			} );
+		}
+
+		return access( this, function( value ) {
+			var data;
+
+			// The calling jQuery object (element matches) is not empty
+			// (and therefore has an element appears at this[ 0 ]) and the
+			// `value` parameter was not undefined. An empty jQuery object
+			// will result in `undefined` for elem = this[ 0 ] which will
+			// throw an exception if an attempt to read a data cache is made.
+			if ( elem && value === undefined ) {
+
+				// Attempt to get data from the cache
+				// The key will always be camelCased in Data
+				data = dataUser.get( elem, key );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// Attempt to "discover" the data in
+				// HTML5 custom data-* attrs
+				data = dataAttr( elem, key );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// We tried really hard, but the data doesn't exist.
+				return;
+			}
+
+			// Set the data...
+			this.each( function() {
+
+				// We always store the camelCased key
+				dataUser.set( this, key, value );
+			} );
+		}, null, value, arguments.length > 1, null, true );
+	},
+
+	removeData: function( key ) {
+		return this.each( function() {
+			dataUser.remove( this, key );
+		} );
+	}
+} );
+
+
+jQuery.extend( {
+	queue: function( elem, type, data ) {
+		var queue;
+
+		if ( elem ) {
+			type = ( type || "fx" ) + "queue";
+			queue = dataPriv.get( elem, type );
+
+			// Speed up dequeue by getting out quickly if this is just a lookup
+			if ( data ) {
+				if ( !queue || Array.isArray( data ) ) {
+					queue = dataPriv.access( elem, type, jQuery.makeArray( data ) );
+				} else {
+					queue.push( data );
+				}
+			}
+			return queue || [];
+		}
+	},
+
+	dequeue: function( elem, type ) {
+		type = type || "fx";
+
+		var queue = jQuery.queue( elem, type ),
+			startLength = queue.length,
+			fn = queue.shift(),
+			hooks = jQuery._queueHooks( elem, type ),
+			next = function() {
+				jQuery.dequeue( elem, type );
+			};
+
+		// If the fx queue is dequeued, always remove the progress sentinel
+		if ( fn === "inprogress" ) {
+			fn = queue.shift();
+			startLength--;
+		}
+
+		if ( fn ) {
+
+			// Add a progress sentinel to prevent the fx queue from being
+			// automatically dequeued
+			if ( type === "fx" ) {
+				queue.unshift( "inprogress" );
+			}
+
+			// Clear up the last queue stop function
+			delete hooks.stop;
+			fn.call( elem, next, hooks );
+		}
+
+		if ( !startLength && hooks ) {
+			hooks.empty.fire();
+		}
+	},
+
+	// Not public - generate a queueHooks object, or return the current one
+	_queueHooks: function( elem, type ) {
+		var key = type + "queueHooks";
+		return dataPriv.get( elem, key ) || dataPriv.access( elem, key, {
+			empty: jQuery.Callbacks( "once memory" ).add( function() {
+				dataPriv.remove( elem, [ type + "queue", key ] );
+			} )
+		} );
+	}
+} );
+
+jQuery.fn.extend( {
+	queue: function( type, data ) {
+		var setter = 2;
+
+		if ( typeof type !== "string" ) {
+			data = type;
+			type = "fx";
+			setter--;
+		}
+
+		if ( arguments.length < setter ) {
+			return jQuery.queue( this[ 0 ], type );
+		}
+
+		return data === undefined ?
+			this :
+			this.each( function() {
+				var queue = jQuery.queue( this, type, data );
+
+				// Ensure a hooks for this queue
+				jQuery._queueHooks( this, type );
+
+				if ( type === "fx" && queue[ 0 ] !== "inprogress" ) {
+					jQuery.dequeue( this, type );
+				}
+			} );
+	},
+	dequeue: function( type ) {
+		return this.each( function() {
+			jQuery.dequeue( this, type );
+		} );
+	},
+	clearQueue: function( type ) {
+		return this.queue( type || "fx", [] );
+	},
+
+	// Get a promise resolved when queues of a certain type
+	// are emptied (fx is the type by default)
+	promise: function( type, obj ) {
+		var tmp,
+			count = 1,
+			defer = jQuery.Deferred(),
+			elements = this,
+			i = this.length,
+			resolve = function() {
+				if ( !( --count ) ) {
+					defer.resolveWith( elements, [ elements ] );
+				}
+			};
+
+		if ( typeof type !== "string" ) {
+			obj = type;
+			type = undefined;
+		}
+		type = type || "fx";
+
+		while ( i-- ) {
+			tmp = dataPriv.get( elements[ i ], type + "queueHooks" );
+			if ( tmp && tmp.empty ) {
+				count++;
+				tmp.empty.add( resolve );
+			}
+		}
+		resolve();
+		return defer.promise( obj );
+	}
+} );
+var pnum = ( /[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/ ).source;
+
+var rcssNum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" );
+
+
+var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
+
+var documentElement = document.documentElement;
+
+
+
+	var isAttached = function( elem ) {
+			return jQuery.contains( elem.ownerDocument, elem );
+		},
+		composed = { composed: true };
+
+	// Support: IE 9 - 11+, Edge 12 - 18+, iOS 10.0 - 10.2 only
+	// Check attachment across shadow DOM boundaries when possible (gh-3504)
+	// Support: iOS 10.0-10.2 only
+	// Early iOS 10 versions support `attachShadow` but not `getRootNode`,
+	// leading to errors. We need to check for `getRootNode`.
+	if ( documentElement.getRootNode ) {
+		isAttached = function( elem ) {
+			return jQuery.contains( elem.ownerDocument, elem ) ||
+				elem.getRootNode( composed ) === elem.ownerDocument;
+		};
+	}
+var isHiddenWithinTree = function( elem, el ) {
+
+		// isHiddenWithinTree might be called from jQuery#filter function;
+		// in that case, element will be second argument
+		elem = el || elem;
+
+		// Inline style trumps all
+		return elem.style.display === "none" ||
+			elem.style.display === "" &&
+
+			// Otherwise, check computed style
+			// Support: Firefox <=43 - 45
+			// Disconnected elements can have computed display: none, so first confirm that elem is
+			// in the document.
+			isAttached( elem ) &&
+
+			jQuery.css( elem, "display" ) === "none";
+	};
+
+var swap = function( elem, options, callback, args ) {
+	var ret, name,
+		old = {};
+
+	// Remember the old values, and insert the new ones
+	for ( name in options ) {
+		old[ name ] = elem.style[ name ];
+		elem.style[ name ] = options[ name ];
+	}
+
+	ret = callback.apply( elem, args || [] );
+
+	// Revert the old values
+	for ( name in options ) {
+		elem.style[ name ] = old[ name ];
+	}
+
+	return ret;
+};
+
+
+
+
+function adjustCSS( elem, prop, valueParts, tween ) {
+	var adjusted, scale,
+		maxIterations = 20,
+		currentValue = tween ?
+			function() {
+				return tween.cur();
+			} :
+			function() {
+				return jQuery.css( elem, prop, "" );
+			},
+		initial = currentValue(),
+		unit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
+
+		// Starting value computation is required for potential unit mismatches
+		initialInUnit = elem.nodeType &&
+			( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) &&
+			rcssNum.exec( jQuery.css( elem, prop ) );
+
+	if ( initialInUnit && initialInUnit[ 3 ] !== unit ) {
+
+		// Support: Firefox <=54
+		// Halve the iteration target value to prevent interference from CSS upper bounds (gh-2144)
+		initial = initial / 2;
+
+		// Trust units reported by jQuery.css
+		unit = unit || initialInUnit[ 3 ];
+
+		// Iteratively approximate from a nonzero starting point
+		initialInUnit = +initial || 1;
+
+		while ( maxIterations-- ) {
+
+			// Evaluate and update our best guess (doubling guesses that zero out).
+			// Finish if the scale equals or crosses 1 (making the old*new product non-positive).
+			jQuery.style( elem, prop, initialInUnit + unit );
+			if ( ( 1 - scale ) * ( 1 - ( scale = currentValue() / initial || 0.5 ) ) <= 0 ) {
+				maxIterations = 0;
+			}
+			initialInUnit = initialInUnit / scale;
+
+		}
+
+		initialInUnit = initialInUnit * 2;
+		jQuery.style( elem, prop, initialInUnit + unit );
+
+		// Make sure we update the tween properties later on
+		valueParts = valueParts || [];
+	}
+
+	if ( valueParts ) {
+		initialInUnit = +initialInUnit || +initial || 0;
+
+		// Apply relative offset (+=/-=) if specified
+		adjusted = valueParts[ 1 ] ?
+			initialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] :
+			+valueParts[ 2 ];
+		if ( tween ) {
+			tween.unit = unit;
+			tween.start = initialInUnit;
+			tween.end = adjusted;
+		}
+	}
+	return adjusted;
+}
+
+
+var defaultDisplayMap = {};
+
+function getDefaultDisplay( elem ) {
+	var temp,
+		doc = elem.ownerDocument,
+		nodeName = elem.nodeName,
+		display = defaultDisplayMap[ nodeName ];
+
+	if ( display ) {
+		return display;
+	}
+
+	temp = doc.body.appendChild( doc.createElement( nodeName ) );
+	display = jQuery.css( temp, "display" );
+
+	temp.parentNode.removeChild( temp );
+
+	if ( display === "none" ) {
+		display = "block";
+	}
+	defaultDisplayMap[ nodeName ] = display;
+
+	return display;
+}
+
+function showHide( elements, show ) {
+	var display, elem,
+		values = [],
+		index = 0,
+		length = elements.length;
+
+	// Determine new display value for elements that need to change
+	for ( ; index < length; index++ ) {
+		elem = elements[ index ];
+		if ( !elem.style ) {
+			continue;
+		}
+
+		display = elem.style.display;
+		if ( show ) {
+
+			// Since we force visibility upon cascade-hidden elements, an immediate (and slow)
+			// check is required in this first loop unless we have a nonempty display value (either
+			// inline or about-to-be-restored)
+			if ( display === "none" ) {
+				values[ index ] = dataPriv.get( elem, "display" ) || null;
+				if ( !values[ index ] ) {
+					elem.style.display = "";
+				}
+			}
+			if ( elem.style.display === "" && isHiddenWithinTree( elem ) ) {
+				values[ index ] = getDefaultDisplay( elem );
+			}
+		} else {
+			if ( display !== "none" ) {
+				values[ index ] = "none";
+
+				// Remember what we're overwriting
+				dataPriv.set( elem, "display", display );
+			}
+		}
+	}
+
+	// Set the display of the elements in a second loop to avoid constant reflow
+	for ( index = 0; index < length; index++ ) {
+		if ( values[ index ] != null ) {
+			elements[ index ].style.display = values[ index ];
+		}
+	}
+
+	return elements;
+}
+
+jQuery.fn.extend( {
+	show: function() {
+		return showHide( this, true );
+	},
+	hide: function() {
+		return showHide( this );
+	},
+	toggle: function( state ) {
+		if ( typeof state === "boolean" ) {
+			return state ? this.show() : this.hide();
+		}
+
+		return this.each( function() {
+			if ( isHiddenWithinTree( this ) ) {
+				jQuery( this ).show();
+			} else {
+				jQuery( this ).hide();
+			}
+		} );
+	}
+} );
+var rcheckableType = ( /^(?:checkbox|radio)$/i );
+
+var rtagName = ( /<([a-z][^\/\0>\x20\t\r\n\f]*)/i );
+
+var rscriptType = ( /^$|^module$|\/(?:java|ecma)script/i );
+
+
+
+// We have to close these tags to support XHTML (#13200)
+var wrapMap = {
+
+	// Support: IE <=9 only
+	option: [ 1, "<select multiple='multiple'>", "</select>" ],
+
+	// XHTML parsers do not magically insert elements in the
+	// same way that tag soup parsers do. So we cannot shorten
+	// this by omitting <tbody> or other required elements.
+	thead: [ 1, "<table>", "</table>" ],
+	col: [ 2, "<table><colgroup>", "</colgroup></table>" ],
+	tr: [ 2, "<table><tbody>", "</tbody></table>" ],
+	td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],
+
+	_default: [ 0, "", "" ]
+};
+
+// Support: IE <=9 only
+wrapMap.optgroup = wrapMap.option;
+
+wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
+wrapMap.th = wrapMap.td;
+
+
+function getAll( context, tag ) {
+
+	// Support: IE <=9 - 11 only
+	// Use typeof to avoid zero-argument method invocation on host objects (#15151)
+	var ret;
+
+	if ( typeof context.getElementsByTagName !== "undefined" ) {
+		ret = context.getElementsByTagName( tag || "*" );
+
+	} else if ( typeof context.querySelectorAll !== "undefined" ) {
+		ret = context.querySelectorAll( tag || "*" );
+
+	} else {
+		ret = [];
+	}
+
+	if ( tag === undefined || tag && nodeName( context, tag ) ) {
+		return jQuery.merge( [ context ], ret );
+	}
+
+	return ret;
+}
+
+
+// Mark scripts as having already been evaluated
+function setGlobalEval( elems, refElements ) {
+	var i = 0,
+		l = elems.length;
+
+	for ( ; i < l; i++ ) {
+		dataPriv.set(
+			elems[ i ],
+			"globalEval",
+			!refElements || dataPriv.get( refElements[ i ], "globalEval" )
+		);
+	}
+}
+
+
+var rhtml = /<|&#?\w+;/;
+
+function buildFragment( elems, context, scripts, selection, ignored ) {
+	var elem, tmp, tag, wrap, attached, j,
+		fragment = context.createDocumentFragment(),
+		nodes = [],
+		i = 0,
+		l = elems.length;
+
+	for ( ; i < l; i++ ) {
+		elem = elems[ i ];
+
+		if ( elem || elem === 0 ) {
+
+			// Add nodes directly
+			if ( toType( elem ) === "object" ) {
+
+				// Support: Android <=4.0 only, PhantomJS 1 only
+				// push.apply(_, arraylike) throws on ancient WebKit
+				jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );
+
+			// Convert non-html into a text node
+			} else if ( !rhtml.test( elem ) ) {
+				nodes.push( context.createTextNode( elem ) );
+
+			// Convert html into DOM nodes
+			} else {
+				tmp = tmp || fragment.appendChild( context.createElement( "div" ) );
+
+				// Deserialize a standard representation
+				tag = ( rtagName.exec( elem ) || [ "", "" ] )[ 1 ].toLowerCase();
+				wrap = wrapMap[ tag ] || wrapMap._default;
+				tmp.innerHTML = wrap[ 1 ] + jQuery.htmlPrefilter( elem ) + wrap[ 2 ];
+
+				// Descend through wrappers to the right content
+				j = wrap[ 0 ];
+				while ( j-- ) {
+					tmp = tmp.lastChild;
+				}
+
+				// Support: Android <=4.0 only, PhantomJS 1 only
+				// push.apply(_, arraylike) throws on ancient WebKit
+				jQuery.merge( nodes, tmp.childNodes );
+
+				// Remember the top-level container
+				tmp = fragment.firstChild;
+
+				// Ensure the created nodes are orphaned (#12392)
+				tmp.textContent = "";
+			}
+		}
+	}
+
+	// Remove wrapper from fragment
+	fragment.textContent = "";
+
+	i = 0;
+	while ( ( elem = nodes[ i++ ] ) ) {
+
+		// Skip elements already in the context collection (trac-4087)
+		if ( selection && jQuery.inArray( elem, selection ) > -1 ) {
+			if ( ignored ) {
+				ignored.push( elem );
+			}
+			continue;
+		}
+
+		attached = isAttached( elem );
+
+		// Append to fragment
+		tmp = getAll( fragment.appendChild( elem ), "script" );
+
+		// Preserve script evaluation history
+		if ( attached ) {
+			setGlobalEval( tmp );
+		}
+
+		// Capture executables
+		if ( scripts ) {
+			j = 0;
+			while ( ( elem = tmp[ j++ ] ) ) {
+				if ( rscriptType.test( elem.type || "" ) ) {
+					scripts.push( elem );
+				}
+			}
+		}
+	}
+
+	return fragment;
+}
+
+
+( function() {
+	var fragment = document.createDocumentFragment(),
+		div = fragment.appendChild( document.createElement( "div" ) ),
+		input = document.createElement( "input" );
+
+	// Support: Android 4.0 - 4.3 only
+	// Check state lost if the name is set (#11217)
+	// Support: Windows Web Apps (WWA)
+	// `name` and `type` must use .setAttribute for WWA (#14901)
+	input.setAttribute( "type", "radio" );
+	input.setAttribute( "checked", "checked" );
+	input.setAttribute( "name", "t" );
+
+	div.appendChild( input );
+
+	// Support: Android <=4.1 only
+	// Older WebKit doesn't clone checked state correctly in fragments
+	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
+
+	// Support: IE <=11 only
+	// Make sure textarea (and checkbox) defaultValue is properly cloned
+	div.innerHTML = "<textarea>x</textarea>";
+	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
+} )();
+
+
+var
+	rkeyEvent = /^key/,
+	rmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,
+	rtypenamespace = /^([^.]*)(?:\.(.+)|)/;
+
+function returnTrue() {
+	return true;
+}
+
+function returnFalse() {
+	return false;
+}
+
+// Support: IE <=9 - 11+
+// focus() and blur() are asynchronous, except when they are no-op.
+// So expect focus to be synchronous when the element is already active,
+// and blur to be synchronous when the element is not already active.
+// (focus and blur are always synchronous in other supported browsers,
+// this just defines when we can count on it).
+function expectSync( elem, type ) {
+	return ( elem === safeActiveElement() ) === ( type === "focus" );
+}
+
+// Support: IE <=9 only
+// Accessing document.activeElement can throw unexpectedly
+// https://bugs.jquery.com/ticket/13393
+function safeActiveElement() {
+	try {
+		return document.activeElement;
+	} catch ( err ) { }
+}
+
+function on( elem, types, selector, data, fn, one ) {
+	var origFn, type;
+
+	// Types can be a map of types/handlers
+	if ( typeof types === "object" ) {
+
+		// ( types-Object, selector, data )
+		if ( typeof selector !== "string" ) {
+
+			// ( types-Object, data )
+			data = data || selector;
+			selector = undefined;
+		}
+		for ( type in types ) {
+			on( elem, type, selector, data, types[ type ], one );
+		}
+		return elem;
+	}
+
+	if ( data == null && fn == null ) {
+
+		// ( types, fn )
+		fn = selector;
+		data = selector = undefined;
+	} else if ( fn == null ) {
+		if ( typeof selector === "string" ) {
+
+			// ( types, selector, fn )
+			fn = data;
+			data = undefined;
+		} else {
+
+			// ( types, data, fn )
+			fn = data;
+			data = selector;
+			selector = undefined;
+		}
+	}
+	if ( fn === false ) {
+		fn = returnFalse;
+	} else if ( !fn ) {
+		return elem;
+	}
+
+	if ( one === 1 ) {
+		origFn = fn;
+		fn = function( event ) {
+
+			// Can use an empty set, since event contains the info
+			jQuery().off( event );
+			return origFn.apply( this, arguments );
+		};
+
+		// Use same guid so caller can remove using origFn
+		fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
+	}
+	return elem.each( function() {
+		jQuery.event.add( this, types, fn, data, selector );
+	} );
+}
+
+/*
+ * Helper functions for managing events -- not part of the public interface.
+ * Props to Dean Edwards' addEvent library for many of the ideas.
+ */
+jQuery.event = {
+
+	global: {},
+
+	add: function( elem, types, handler, data, selector ) {
+
+		var handleObjIn, eventHandle, tmp,
+			events, t, handleObj,
+			special, handlers, type, namespaces, origType,
+			elemData = dataPriv.get( elem );
+
+		// Don't attach events to noData or text/comment nodes (but allow plain objects)
+		if ( !elemData ) {
+			return;
+		}
+
+		// Caller can pass in an object of custom data in lieu of the handler
+		if ( handler.handler ) {
+			handleObjIn = handler;
+			handler = handleObjIn.handler;
+			selector = handleObjIn.selector;
+		}
+
+		// Ensure that invalid selectors throw exceptions at attach time
+		// Evaluate against documentElement in case elem is a non-element node (e.g., document)
+		if ( selector ) {
+			jQuery.find.matchesSelector( documentElement, selector );
+		}
+
+		// Make sure that the handler has a unique ID, used to find/remove it later
+		if ( !handler.guid ) {
+			handler.guid = jQuery.guid++;
+		}
+
+		// Init the element's event structure and main handler, if this is the first
+		if ( !( events = elemData.events ) ) {
+			events = elemData.events = {};
+		}
+		if ( !( eventHandle = elemData.handle ) ) {
+			eventHandle = elemData.handle = function( e ) {
+
+				// Discard the second event of a jQuery.event.trigger() and
+				// when an event is called after a page has unloaded
+				return typeof jQuery !== "undefined" && jQuery.event.triggered !== e.type ?
+					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
+			};
+		}
+
+		// Handle multiple events separated by a space
+		types = ( types || "" ).match( rnothtmlwhite ) || [ "" ];
+		t = types.length;
+		while ( t-- ) {
+			tmp = rtypenamespace.exec( types[ t ] ) || [];
+			type = origType = tmp[ 1 ];
+			namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
+
+			// There *must* be a type, no attaching namespace-only handlers
+			if ( !type ) {
+				continue;
+			}
+
+			// If event changes its type, use the special event handlers for the changed type
+			special = jQuery.event.special[ type ] || {};
+
+			// If selector defined, determine special event api type, otherwise given type
+			type = ( selector ? special.delegateType : special.bindType ) || type;
+
+			// Update special based on newly reset type
+			special = jQuery.event.special[ type ] || {};
+
+			// handleObj is passed to all event handlers
+			handleObj = jQuery.extend( {
+				type: type,
+				origType: origType,
+				data: data,
+				handler: handler,
+				guid: handler.guid,
+				selector: selector,
+				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
+				namespace: namespaces.join( "." )
+			}, handleObjIn );
+
+			// Init the event handler queue if we're the first
+			if ( !( handlers = events[ type ] ) ) {
+				handlers = events[ type ] = [];
+				handlers.delegateCount = 0;
+
+				// Only use addEventListener if the special events handler returns false
+				if ( !special.setup ||
+					special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
+
+					if ( elem.addEventListener ) {
+						elem.addEventListener( type, eventHandle );
+					}
+				}
+			}
+
+			if ( special.add ) {
+				special.add.call( elem, handleObj );
+
+				if ( !handleObj.handler.guid ) {
+					handleObj.handler.guid = handler.guid;
+				}
+			}
+
+			// Add to the element's handler list, delegates in front
+			if ( selector ) {
+				handlers.splice( handlers.delegateCount++, 0, handleObj );
+			} else {
+				handlers.push( handleObj );
+			}
+
+			// Keep track of which events have ever been used, for event optimization
+			jQuery.event.global[ type ] = true;
+		}
+
+	},
+
+	// Detach an event or set of events from an element
+	remove: function( elem, types, handler, selector, mappedTypes ) {
+
+		var j, origCount, tmp,
+			events, t, handleObj,
+			special, handlers, type, namespaces, origType,
+			elemData = dataPriv.hasData( elem ) && dataPriv.get( elem );
+
+		if ( !elemData || !( events = elemData.events ) ) {
+			return;
+		}
+
+		// Once for each type.namespace in types; type may be omitted
+		types = ( types || "" ).match( rnothtmlwhite ) || [ "" ];
+		t = types.length;
+		while ( t-- ) {
+			tmp = rtypenamespace.exec( types[ t ] ) || [];
+			type = origType = tmp[ 1 ];
+			namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
+
+			// Unbind all events (on this namespace, if provided) for the element
+			if ( !type ) {
+				for ( type in events ) {
+					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
+				}
+				continue;
+			}
+
+			special = jQuery.event.special[ type ] || {};
+			type = ( selector ? special.delegateType : special.bindType ) || type;
+			handlers = events[ type ] || [];
+			tmp = tmp[ 2 ] &&
+				new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" );
+
+			// Remove matching events
+			origCount = j = handlers.length;
+			while ( j-- ) {
+				handleObj = handlers[ j ];
+
+				if ( ( mappedTypes || origType === handleObj.origType ) &&
+					( !handler || handler.guid === handleObj.guid ) &&
+					( !tmp || tmp.test( handleObj.namespace ) ) &&
+					( !selector || selector === handleObj.selector ||
+						selector === "**" && handleObj.selector ) ) {
+					handlers.splice( j, 1 );
+
+					if ( handleObj.selector ) {
+						handlers.delegateCount--;
+					}
+					if ( special.remove ) {
+						special.remove.call( elem, handleObj );
+					}
+				}
+			}
+
+			// Remove generic event handler if we removed something and no more handlers exist
+			// (avoids potential for endless recursion during removal of special event handlers)
+			if ( origCount && !handlers.length ) {
+				if ( !special.teardown ||
+					special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
+
+					jQuery.removeEvent( elem, type, elemData.handle );
+				}
+
+				delete events[ type ];
+			}
+		}
+
+		// Remove data and the expando if it's no longer used
+		if ( jQuery.isEmptyObject( events ) ) {
+			dataPriv.remove( elem, "handle events" );
+		}
+	},
+
+	dispatch: function( nativeEvent ) {
+
+		// Make a writable jQuery.Event from the native event object
+		var event = jQuery.event.fix( nativeEvent );
+
+		var i, j, ret, matched, handleObj, handlerQueue,
+			args = new Array( arguments.length ),
+			handlers = ( dataPriv.get( this, "events" ) || {} )[ event.type ] || [],
+			special = jQuery.event.special[ event.type ] || {};
+
+		// Use the fix-ed jQuery.Event rather than the (read-only) native event
+		args[ 0 ] = event;
+
+		for ( i = 1; i < arguments.length; i++ ) {
+			args[ i ] = arguments[ i ];
+		}
+
+		event.delegateTarget = this;
+
+		// Call the preDispatch hook for the mapped type, and let it bail if desired
+		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
+			return;
+		}
+
+		// Determine handlers
+		handlerQueue = jQuery.event.handlers.call( this, event, handlers );
+
+		// Run delegates first; they may want to stop propagation beneath us
+		i = 0;
+		while ( ( matched = handlerQueue[ i++ ] ) && !event.isPropagationStopped() ) {
+			event.currentTarget = matched.elem;
+
+			j = 0;
+			while ( ( handleObj = matched.handlers[ j++ ] ) &&
+				!event.isImmediatePropagationStopped() ) {
+
+				// If the event is namespaced, then each handler is only invoked if it is
+				// specially universal or its namespaces are a superset of the event's.
+				if ( !event.rnamespace || handleObj.namespace === false ||
+					event.rnamespace.test( handleObj.namespace ) ) {
+
+					event.handleObj = handleObj;
+					event.data = handleObj.data;
+
+					ret = ( ( jQuery.event.special[ handleObj.origType ] || {} ).handle ||
+						handleObj.handler ).apply( matched.elem, args );
+
+					if ( ret !== undefined ) {
+						if ( ( event.result = ret ) === false ) {
+							event.preventDefault();
+							event.stopPropagation();
+						}
+					}
+				}
+			}
+		}
+
+		// Call the postDispatch hook for the mapped type
+		if ( special.postDispatch ) {
+			special.postDispatch.call( this, event );
+		}
+
+		return event.result;
+	},
+
+	handlers: function( event, handlers ) {
+		var i, handleObj, sel, matchedHandlers, matchedSelectors,
+			handlerQueue = [],
+			delegateCount = handlers.delegateCount,
+			cur = event.target;
+
+		// Find delegate handlers
+		if ( delegateCount &&
+
+			// Support: IE <=9
+			// Black-hole SVG <use> instance trees (trac-13180)
+			cur.nodeType &&
+
+			// Support: Firefox <=42
+			// Suppress spec-violating clicks indicating a non-primary pointer button (trac-3861)
+			// https://www.w3.org/TR/DOM-Level-3-Events/#event-type-click
+			// Support: IE 11 only
+			// ...but not arrow key "clicks" of radio inputs, which can have `button` -1 (gh-2343)
+			!( event.type === "click" && event.button >= 1 ) ) {
+
+			for ( ; cur !== this; cur = cur.parentNode || this ) {
+
+				// Don't check non-elements (#13208)
+				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
+				if ( cur.nodeType === 1 && !( event.type === "click" && cur.disabled === true ) ) {
+					matchedHandlers = [];
+					matchedSelectors = {};
+					for ( i = 0; i < delegateCount; i++ ) {
+						handleObj = handlers[ i ];
+
+						// Don't conflict with Object.prototype properties (#13203)
+						sel = handleObj.selector + " ";
+
+						if ( matchedSelectors[ sel ] === undefined ) {
+							matchedSelectors[ sel ] = handleObj.needsContext ?
+								jQuery( sel, this ).index( cur ) > -1 :
+								jQuery.find( sel, this, null, [ cur ] ).length;
+						}
+						if ( matchedSelectors[ sel ] ) {
+							matchedHandlers.push( handleObj );
+						}
+					}
+					if ( matchedHandlers.length ) {
+						handlerQueue.push( { elem: cur, handlers: matchedHandlers } );
+					}
+				}
+			}
+		}
+
+		// Add the remaining (directly-bound) handlers
+		cur = this;
+		if ( delegateCount < handlers.length ) {
+			handlerQueue.push( { elem: cur, handlers: handlers.slice( delegateCount ) } );
+		}
+
+		return handlerQueue;
+	},
+
+	addProp: function( name, hook ) {
+		Object.defineProperty( jQuery.Event.prototype, name, {
+			enumerable: true,
+			configurable: true,
+
+			get: isFunction( hook ) ?
+				function() {
+					if ( this.originalEvent ) {
+							return hook( this.originalEvent );
+					}
+				} :
+				function() {
+					if ( this.originalEvent ) {
+							return this.originalEvent[ name ];
+					}
+				},
+
+			set: function( value ) {
+				Object.defineProperty( this, name, {
+					enumerable: true,
+					configurable: true,
+					writable: true,
+					value: value
+				} );
+			}
+		} );
+	},
+
+	fix: function( originalEvent ) {
+		return originalEvent[ jQuery.expando ] ?
+			originalEvent :
+			new jQuery.Event( originalEvent );
+	},
+
+	special: {
+		load: {
+
+			// Prevent triggered image.load events from bubbling to window.load
+			noBubble: true
+		},
+		click: {
+
+			// Utilize native event to ensure correct state for checkable inputs
+			setup: function( data ) {
+
+				// For mutual compressibility with _default, replace `this` access with a local var.
+				// `|| data` is dead code meant only to preserve the variable through minification.
+				var el = this || data;
+
+				// Claim the first handler
+				if ( rcheckableType.test( el.type ) &&
+					el.click && nodeName( el, "input" ) ) {
+
+					// dataPriv.set( el, "click", ... )
+					leverageNative( el, "click", returnTrue );
+				}
+
+				// Return false to allow normal processing in the caller
+				return false;
+			},
+			trigger: function( data ) {
+
+				// For mutual compressibility with _default, replace `this` access with a local var.
+				// `|| data` is dead code meant only to preserve the variable through minification.
+				var el = this || data;
+
+				// Force setup before triggering a click
+				if ( rcheckableType.test( el.type ) &&
+					el.click && nodeName( el, "input" ) ) {
+
+					leverageNative( el, "click" );
+				}
+
+				// Return non-false to allow normal event-path propagation
+				return true;
+			},
+
+			// For cross-browser consistency, suppress native .click() on links
+			// Also prevent it if we're currently inside a leveraged native-event stack
+			_default: function( event ) {
+				var target = event.target;
+				return rcheckableType.test( target.type ) &&
+					target.click && nodeName( target, "input" ) &&
+					dataPriv.get( target, "click" ) ||
+					nodeName( target, "a" );
+			}
+		},
+
+		beforeunload: {
+			postDispatch: function( event ) {
+
+				// Support: Firefox 20+
+				// Firefox doesn't alert if the returnValue field is not set.
+				if ( event.result !== undefined && event.originalEvent ) {
+					event.originalEvent.returnValue = event.result;
+				}
+			}
+		}
+	}
+};
+
+// Ensure the presence of an event listener that handles manually-triggered
+// synthetic events by interrupting progress until reinvoked in response to
+// *native* events that it fires directly, ensuring that state changes have
+// already occurred before other listeners are invoked.
+function leverageNative( el, type, expectSync ) {
+
+	// Missing expectSync indicates a trigger call, which must force setup through jQuery.event.add
+	if ( !expectSync ) {
+		if ( dataPriv.get( el, type ) === undefined ) {
+			jQuery.event.add( el, type, returnTrue );
+		}
+		return;
+	}
+
+	// Register the controller as a special universal handler for all event namespaces
+	dataPriv.set( el, type, false );
+	jQuery.event.add( el, type, {
+		namespace: false,
+		handler: function( event ) {
+			var notAsync, result,
+				saved = dataPriv.get( this, type );
+
+			if ( ( event.isTrigger & 1 ) && this[ type ] ) {
+
+				// Interrupt processing of the outer synthetic .trigger()ed event
+				// Saved data should be false in such cases, but might be a leftover capture object
+				// from an async native handler (gh-4350)
+				if ( !saved.length ) {
+
+					// Store arguments for use when handling the inner native event
+					// There will always be at least one argument (an event object), so this array
+					// will not be confused with a leftover capture object.
+					saved = slice.call( arguments );
+					dataPriv.set( this, type, saved );
+
+					// Trigger the native event and capture its result
+					// Support: IE <=9 - 11+
+					// focus() and blur() are asynchronous
+					notAsync = expectSync( this, type );
+					this[ type ]();
+					result = dataPriv.get( this, type );
+					if ( saved !== result || notAsync ) {
+						dataPriv.set( this, type, false );
+					} else {
+						result = {};
+					}
+					if ( saved !== result ) {
+
+						// Cancel the outer synthetic event
+						event.stopImmediatePropagation();
+						event.preventDefault();
+						return result.value;
+					}
+
+				// If this is an inner synthetic event for an event with a bubbling surrogate
+				// (focus or blur), assume that the surrogate already propagated from triggering the
+				// native event and prevent that from happening again here.
+				// This technically gets the ordering wrong w.r.t. to `.trigger()` (in which the
+				// bubbling surrogate propagates *after* the non-bubbling base), but that seems
+				// less bad than duplication.
+				} else if ( ( jQuery.event.special[ type ] || {} ).delegateType ) {
+					event.stopPropagation();
+				}
+
+			// If this is a native event triggered above, everything is now in order
+			// Fire an inner synthetic event with the original arguments
+			} else if ( saved.length ) {
+
+				// ...and capture the result
+				dataPriv.set( this, type, {
+					value: jQuery.event.trigger(
+
+						// Support: IE <=9 - 11+
+						// Extend with the prototype to reset the above stopImmediatePropagation()
+						jQuery.extend( saved[ 0 ], jQuery.Event.prototype ),
+						saved.slice( 1 ),
+						this
+					)
+				} );
+
+				// Abort handling of the native event
+				event.stopImmediatePropagation();
+			}
+		}
+	} );
+}
+
+jQuery.removeEvent = function( elem, type, handle ) {
+
+	// This "if" is needed for plain objects
+	if ( elem.removeEventListener ) {
+		elem.removeEventListener( type, handle );
+	}
+};
+
+jQuery.Event = function( src, props ) {
+
+	// Allow instantiation without the 'new' keyword
+	if ( !( this instanceof jQuery.Event ) ) {
+		return new jQuery.Event( src, props );
+	}
+
+	// Event object
+	if ( src && src.type ) {
+		this.originalEvent = src;
+		this.type = src.type;
+
+		// Events bubbling up the document may have been marked as prevented
+		// by a handler lower down the tree; reflect the correct value.
+		this.isDefaultPrevented = src.defaultPrevented ||
+				src.defaultPrevented === undefined &&
+
+				// Support: Android <=2.3 only
+				src.returnValue === false ?
+			returnTrue :
+			returnFalse;
+
+		// Create target properties
+		// Support: Safari <=6 - 7 only
+		// Target should not be a text node (#504, #13143)
+		this.target = ( src.target && src.target.nodeType === 3 ) ?
+			src.target.parentNode :
+			src.target;
+
+		this.currentTarget = src.currentTarget;
+		this.relatedTarget = src.relatedTarget;
+
+	// Event type
+	} else {
+		this.type = src;
+	}
+
+	// Put explicitly provided properties onto the event object
+	if ( props ) {
+		jQuery.extend( this, props );
+	}
+
+	// Create a timestamp if incoming event doesn't have one
+	this.timeStamp = src && src.timeStamp || Date.now();
+
+	// Mark it as fixed
+	this[ jQuery.expando ] = true;
+};
+
+// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
+// https://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
+jQuery.Event.prototype = {
+	constructor: jQuery.Event,
+	isDefaultPrevented: returnFalse,
+	isPropagationStopped: returnFalse,
+	isImmediatePropagationStopped: returnFalse,
+	isSimulated: false,
+
+	preventDefault: function() {
+		var e = this.originalEvent;
+
+		this.isDefaultPrevented = returnTrue;
+
+		if ( e && !this.isSimulated ) {
+			e.preventDefault();
+		}
+	},
+	stopPropagation: function() {
+		var e = this.originalEvent;
+
+		this.isPropagationStopped = returnTrue;
+
+		if ( e && !this.isSimulated ) {
+			e.stopPropagation();
+		}
+	},
+	stopImmediatePropagation: function() {
+		var e = this.originalEvent;
+
+		this.isImmediatePropagationStopped = returnTrue;
+
+		if ( e && !this.isSimulated ) {
+			e.stopImmediatePropagation();
+		}
+
+		this.stopPropagation();
+	}
+};
+
+// Includes all common event props including KeyEvent and MouseEvent specific props
+jQuery.each( {
+	altKey: true,
+	bubbles: true,
+	cancelable: true,
+	changedTouches: true,
+	ctrlKey: true,
+	detail: true,
+	eventPhase: true,
+	metaKey: true,
+	pageX: true,
+	pageY: true,
+	shiftKey: true,
+	view: true,
+	"char": true,
+	code: true,
+	charCode: true,
+	key: true,
+	keyCode: true,
+	button: true,
+	buttons: true,
+	clientX: true,
+	clientY: true,
+	offsetX: true,
+	offsetY: true,
+	pointerId: true,
+	pointerType: true,
+	screenX: true,
+	screenY: true,
+	targetTouches: true,
+	toElement: true,
+	touches: true,
+
+	which: function( event ) {
+		var button = event.button;
+
+		// Add which for key events
+		if ( event.which == null && rkeyEvent.test( event.type ) ) {
+			return event.charCode != null ? event.charCode : event.keyCode;
+		}
+
+		// Add which for click: 1 === left; 2 === middle; 3 === right
+		if ( !event.which && button !== undefined && rmouseEvent.test( event.type ) ) {
+			if ( button & 1 ) {
+				return 1;
+			}
+
+			if ( button & 2 ) {
+				return 3;
+			}
+
+			if ( button & 4 ) {
+				return 2;
+			}
+
+			return 0;
+		}
+
+		return event.which;
+	}
+}, jQuery.event.addProp );
+
+jQuery.each( { focus: "focusin", blur: "focusout" }, function( type, delegateType ) {
+	jQuery.event.special[ type ] = {
+
+		// Utilize native event if possible so blur/focus sequence is correct
+		setup: function() {
+
+			// Claim the first handler
+			// dataPriv.set( this, "focus", ... )
+			// dataPriv.set( this, "blur", ... )
+			leverageNative( this, type, expectSync );
+
+			// Return false to allow normal processing in the caller
+			return false;
+		},
+		trigger: function() {
+
+			// Force setup before trigger
+			leverageNative( this, type );
+
+			// Return non-false to allow normal event-path propagation
+			return true;
+		},
+
+		delegateType: delegateType
+	};
+} );
+
+// Create mouseenter/leave events using mouseover/out and event-time checks
+// so that event delegation works in jQuery.
+// Do the same for pointerenter/pointerleave and pointerover/pointerout
+//
+// Support: Safari 7 only
+// Safari sends mouseenter too often; see:
+// https://bugs.chromium.org/p/chromium/issues/detail?id=470258
+// for the description of the bug (it existed in older Chrome versions as well).
+jQuery.each( {
+	mouseenter: "mouseover",
+	mouseleave: "mouseout",
+	pointerenter: "pointerover",
+	pointerleave: "pointerout"
+}, function( orig, fix ) {
+	jQuery.event.special[ orig ] = {
+		delegateType: fix,
+		bindType: fix,
+
+		handle: function( event ) {
+			var ret,
+				target = this,
+				related = event.relatedTarget,
+				handleObj = event.handleObj;
+
+			// For mouseenter/leave call the handler if related is outside the target.
+			// NB: No relatedTarget if the mouse left/entered the browser window
+			if ( !related || ( related !== target && !jQuery.contains( target, related ) ) ) {
+				event.type = handleObj.origType;
+				ret = handleObj.handler.apply( this, arguments );
+				event.type = fix;
+			}
+			return ret;
+		}
+	};
+} );
+
+jQuery.fn.extend( {
+
+	on: function( types, selector, data, fn ) {
+		return on( this, types, selector, data, fn );
+	},
+	one: function( types, selector, data, fn ) {
+		return on( this, types, selector, data, fn, 1 );
+	},
+	off: function( types, selector, fn ) {
+		var handleObj, type;
+		if ( types && types.preventDefault && types.handleObj ) {
+
+			// ( event )  dispatched jQuery.Event
+			handleObj = types.handleObj;
+			jQuery( types.delegateTarget ).off(
+				handleObj.namespace ?
+					handleObj.origType + "." + handleObj.namespace :
+					handleObj.origType,
+				handleObj.selector,
+				handleObj.handler
+			);
+			return this;
+		}
+		if ( typeof types === "object" ) {
+
+			// ( types-object [, selector] )
+			for ( type in types ) {
+				this.off( type, selector, types[ type ] );
+			}
+			return this;
+		}
+		if ( selector === false || typeof selector === "function" ) {
+
+			// ( types [, fn] )
+			fn = selector;
+			selector = undefined;
+		}
+		if ( fn === false ) {
+			fn = returnFalse;
+		}
+		return this.each( function() {
+			jQuery.event.remove( this, types, fn, selector );
+		} );
+	}
+} );
+
+
+var
+
+	/* eslint-disable max-len */
+
+	// See https://github.com/eslint/eslint/issues/3229
+	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\/\0>\x20\t\r\n\f]*)[^>]*)\/>/gi,
+
+	/* eslint-enable */
+
+	// Support: IE <=10 - 11, Edge 12 - 13 only
+	// In IE/Edge using regex groups here causes severe slowdowns.
+	// See https://connect.microsoft.com/IE/feedback/details/1736512/
+	rnoInnerhtml = /<script|<style|<link/i,
+
+	// checked="checked" or checked
+	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
+	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g;
+
+// Prefer a tbody over its parent table for containing new rows
+function manipulationTarget( elem, content ) {
+	if ( nodeName( elem, "table" ) &&
+		nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ) {
+
+		return jQuery( elem ).children( "tbody" )[ 0 ] || elem;
+	}
+
+	return elem;
+}
+
+// Replace/restore the type attribute of script elements for safe DOM manipulation
+function disableScript( elem ) {
+	elem.type = ( elem.getAttribute( "type" ) !== null ) + "/" + elem.type;
+	return elem;
+}
+function restoreScript( elem ) {
+	if ( ( elem.type || "" ).slice( 0, 5 ) === "true/" ) {
+		elem.type = elem.type.slice( 5 );
+	} else {
+		elem.removeAttribute( "type" );
+	}
+
+	return elem;
+}
+
+function cloneCopyEvent( src, dest ) {
+	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;
+
+	if ( dest.nodeType !== 1 ) {
+		return;
+	}
+
+	// 1. Copy private data: events, handlers, etc.
+	if ( dataPriv.hasData( src ) ) {
+		pdataOld = dataPriv.access( src );
+		pdataCur = dataPriv.set( dest, pdataOld );
+		events = pdataOld.events;
+
+		if ( events ) {
+			delete pdataCur.handle;
+			pdataCur.events = {};
+
+			for ( type in events ) {
+				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
+					jQuery.event.add( dest, type, events[ type ][ i ] );
+				}
+			}
+		}
+	}
+
+	// 2. Copy user data
+	if ( dataUser.hasData( src ) ) {
+		udataOld = dataUser.access( src );
+		udataCur = jQuery.extend( {}, udataOld );
+
+		dataUser.set( dest, udataCur );
+	}
+}
+
+// Fix IE bugs, see support tests
+function fixInput( src, dest ) {
+	var nodeName = dest.nodeName.toLowerCase();
+
+	// Fails to persist the checked state of a cloned checkbox or radio button.
+	if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
+		dest.checked = src.checked;
+
+	// Fails to return the selected option to the default selected state when cloning options
+	} else if ( nodeName === "input" || nodeName === "textarea" ) {
+		dest.defaultValue = src.defaultValue;
+	}
+}
+
+function domManip( collection, args, callback, ignored ) {
+
+	// Flatten any nested arrays
+	args = concat.apply( [], args );
+
+	var fragment, first, scripts, hasScripts, node, doc,
+		i = 0,
+		l = collection.length,
+		iNoClone = l - 1,
+		value = args[ 0 ],
+		valueIsFunction = isFunction( value );
+
+	// We can't cloneNode fragments that contain checked, in WebKit
+	if ( valueIsFunction ||
+			( l > 1 && typeof value === "string" &&
+				!support.checkClone && rchecked.test( value ) ) ) {
+		return collection.each( function( index ) {
+			var self = collection.eq( index );
+			if ( valueIsFunction ) {
+				args[ 0 ] = value.call( this, index, self.html() );
+			}
+			domManip( self, args, callback, ignored );
+		} );
+	}
+
+	if ( l ) {
+		fragment = buildFragment( args, collection[ 0 ].ownerDocument, false, collection, ignored );
+		first = fragment.firstChild;
+
+		if ( fragment.childNodes.length === 1 ) {
+			fragment = first;
+		}
+
+		// Require either new content or an interest in ignored elements to invoke the callback
+		if ( first || ignored ) {
+			scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
+			hasScripts = scripts.length;
+
+			// Use the original fragment for the last item
+			// instead of the first because it can end up
+			// being emptied incorrectly in certain situations (#8070).
+			for ( ; i < l; i++ ) {
+				node = fragment;
+
+				if ( i !== iNoClone ) {
+					node = jQuery.clone( node, true, true );
+
+					// Keep references to cloned scripts for later restoration
+					if ( hasScripts ) {
+
+						// Support: Android <=4.0 only, PhantomJS 1 only
+						// push.apply(_, arraylike) throws on ancient WebKit
+						jQuery.merge( scripts, getAll( node, "script" ) );
+					}
+				}
+
+				callback.call( collection[ i ], node, i );
+			}
+
+			if ( hasScripts ) {
+				doc = scripts[ scripts.length - 1 ].ownerDocument;
+
+				// Reenable scripts
+				jQuery.map( scripts, restoreScript );
+
+				// Evaluate executable scripts on first document insertion
+				for ( i = 0; i < hasScripts; i++ ) {
+					node = scripts[ i ];
+					if ( rscriptType.test( node.type || "" ) &&
+						!dataPriv.access( node, "globalEval" ) &&
+						jQuery.contains( doc, node ) ) {
+
+						if ( node.src && ( node.type || "" ).toLowerCase()  !== "module" ) {
+
+							// Optional AJAX dependency, but won't run scripts if not present
+							if ( jQuery._evalUrl && !node.noModule ) {
+								jQuery._evalUrl( node.src, {
+									nonce: node.nonce || node.getAttribute( "nonce" )
+								} );
+							}
+						} else {
+							DOMEval( node.textContent.replace( rcleanScript, "" ), node, doc );
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return collection;
+}
+
+function remove( elem, selector, keepData ) {
+	var node,
+		nodes = selector ? jQuery.filter( selector, elem ) : elem,
+		i = 0;
+
+	for ( ; ( node = nodes[ i ] ) != null; i++ ) {
+		if ( !keepData && node.nodeType === 1 ) {
+			jQuery.cleanData( getAll( node ) );
+		}
+
+		if ( node.parentNode ) {
+			if ( keepData && isAttached( node ) ) {
+				setGlobalEval( getAll( node, "script" ) );
+			}
+			node.parentNode.removeChild( node );
+		}
+	}
+
+	return elem;
+}
+
+jQuery.extend( {
+	htmlPrefilter: function( html ) {
+		return html.replace( rxhtmlTag, "<$1></$2>" );
+	},
+
+	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
+		var i, l, srcElements, destElements,
+			clone = elem.cloneNode( true ),
+			inPage = isAttached( elem );
+
+		// Fix IE cloning issues
+		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
+				!jQuery.isXMLDoc( elem ) ) {
+
+			// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2
+			destElements = getAll( clone );
+			srcElements = getAll( elem );
+
+			for ( i = 0, l = srcElements.length; i < l; i++ ) {
+				fixInput( srcElements[ i ], destElements[ i ] );
+			}
+		}
+
+		// Copy the events from the original to the clone
+		if ( dataAndEvents ) {
+			if ( deepDataAndEvents ) {
+				srcElements = srcElements || getAll( elem );
+				destElements = destElements || getAll( clone );
+
+				for ( i = 0, l = srcElements.length; i < l; i++ ) {
+					cloneCopyEvent( srcElements[ i ], destElements[ i ] );
+				}
+			} else {
+				cloneCopyEvent( elem, clone );
+			}
+		}
+
+		// Preserve script evaluation history
+		destElements = getAll( clone, "script" );
+		if ( destElements.length > 0 ) {
+			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
+		}
+
+		// Return the cloned set
+		return clone;
+	},
+
+	cleanData: function( elems ) {
+		var data, elem, type,
+			special = jQuery.event.special,
+			i = 0;
+
+		for ( ; ( elem = elems[ i ] ) !== undefined; i++ ) {
+			if ( acceptData( elem ) ) {
+				if ( ( data = elem[ dataPriv.expando ] ) ) {
+					if ( data.events ) {
+						for ( type in data.events ) {
+							if ( special[ type ] ) {
+								jQuery.event.remove( elem, type );
+
+							// This is a shortcut to avoid jQuery.event.remove's overhead
+							} else {
+								jQuery.removeEvent( elem, type, data.handle );
+							}
+						}
+					}
+
+					// Support: Chrome <=35 - 45+
+					// Assign undefined instead of using delete, see Data#remove
+					elem[ dataPriv.expando ] = undefined;
+				}
+				if ( elem[ dataUser.expando ] ) {
+
+					// Support: Chrome <=35 - 45+
+					// Assign undefined instead of using delete, see Data#remove
+					elem[ dataUser.expando ] = undefined;
+				}
+			}
+		}
+	}
+} );
+
+jQuery.fn.extend( {
+	detach: function( selector ) {
+		return remove( this, selector, true );
+	},
+
+	remove: function( selector ) {
+		return remove( this, selector );
+	},
+
+	text: function( value ) {
+		return access( this, function( value ) {
+			return value === undefined ?
+				jQuery.text( this ) :
+				this.empty().each( function() {
+					if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+						this.textContent = value;
+					}
+				} );
+		}, null, value, arguments.length );
+	},
+
+	append: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+				var target = manipulationTarget( this, elem );
+				target.appendChild( elem );
+			}
+		} );
+	},
+
+	prepend: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+				var target = manipulationTarget( this, elem );
+				target.insertBefore( elem, target.firstChild );
+			}
+		} );
+	},
+
+	before: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.parentNode ) {
+				this.parentNode.insertBefore( elem, this );
+			}
+		} );
+	},
+
+	after: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.parentNode ) {
+				this.parentNode.insertBefore( elem, this.nextSibling );
+			}
+		} );
+	},
+
+	empty: function() {
+		var elem,
+			i = 0;
+
+		for ( ; ( elem = this[ i ] ) != null; i++ ) {
+			if ( elem.nodeType === 1 ) {
+
+				// Prevent memory leaks
+				jQuery.cleanData( getAll( elem, false ) );
+
+				// Remove any remaining nodes
+				elem.textContent = "";
+			}
+		}
+
+		return this;
+	},
+
+	clone: function( dataAndEvents, deepDataAndEvents ) {
+		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
+		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
+
+		return this.map( function() {
+			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
+		} );
+	},
+
+	html: function( value ) {
+		return access( this, function( value ) {
+			var elem = this[ 0 ] || {},
+				i = 0,
+				l = this.length;
+
+			if ( value === undefined && elem.nodeType === 1 ) {
+				return elem.innerHTML;
+			}
+
+			// See if we can take a shortcut and just use innerHTML
+			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
+				!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {
+
+				value = jQuery.htmlPrefilter( value );
+
+				try {
+					for ( ; i < l; i++ ) {
+						elem = this[ i ] || {};
+
+						// Remove element nodes and prevent memory leaks
+						if ( elem.nodeType === 1 ) {
+							jQuery.cleanData( getAll( elem, false ) );
+							elem.innerHTML = value;
+						}
+					}
+
+					elem = 0;
+
+				// If using innerHTML throws an exception, use the fallback method
+				} catch ( e ) {}
+			}
+
+			if ( elem ) {
+				this.empty().append( value );
+			}
+		}, null, value, arguments.length );
+	},
+
+	replaceWith: function() {
+		var ignored = [];
+
+		// Make the changes, replacing each non-ignored context element with the new content
+		return domManip( this, arguments, function( elem ) {
+			var parent = this.parentNode;
+
+			if ( jQuery.inArray( this, ignored ) < 0 ) {
+				jQuery.cleanData( getAll( this ) );
+				if ( parent ) {
+					parent.replaceChild( elem, this );
+				}
+			}
+
+		// Force callback invocation
+		}, ignored );
+	}
+} );
+
+jQuery.each( {
+	appendTo: "append",
+	prependTo: "prepend",
+	insertBefore: "before",
+	insertAfter: "after",
+	replaceAll: "replaceWith"
+}, function( name, original ) {
+	jQuery.fn[ name ] = function( selector ) {
+		var elems,
+			ret = [],
+			insert = jQuery( selector ),
+			last = insert.length - 1,
+			i = 0;
+
+		for ( ; i <= last; i++ ) {
+			elems = i === last ? this : this.clone( true );
+			jQuery( insert[ i ] )[ original ]( elems );
+
+			// Support: Android <=4.0 only, PhantomJS 1 only
+			// .get() because push.apply(_, arraylike) throws on ancient WebKit
+			push.apply( ret, elems.get() );
+		}
+
+		return this.pushStack( ret );
+	};
+} );
+var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
+
+var getStyles = function( elem ) {
+
+		// Support: IE <=11 only, Firefox <=30 (#15098, #14150)
+		// IE throws on elements created in popups
+		// FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
+		var view = elem.ownerDocument.defaultView;
+
+		if ( !view || !view.opener ) {
+			view = window;
+		}
+
+		return view.getComputedStyle( elem );
+	};
+
+var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
+
+
+
+( function() {
+
+	// Executing both pixelPosition & boxSizingReliable tests require only one layout
+	// so they're executed at the same time to save the second computation.
+	function computeStyleTests() {
+
+		// This is a singleton, we need to execute it only once
+		if ( !div ) {
+			return;
+		}
+
+		container.style.cssText = "position:absolute;left:-11111px;width:60px;" +
+			"margin-top:1px;padding:0;border:0";
+		div.style.cssText =
+			"position:relative;display:block;box-sizing:border-box;overflow:scroll;" +
+			"margin:auto;border:1px;padding:1px;" +
+			"width:60%;top:1%";
+		documentElement.appendChild( container ).appendChild( div );
+
+		var divStyle = window.getComputedStyle( div );
+		pixelPositionVal = divStyle.top !== "1%";
+
+		// Support: Android 4.0 - 4.3 only, Firefox <=3 - 44
+		reliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;
+
+		// Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3
+		// Some styles come back with percentage values, even though they shouldn't
+		div.style.right = "60%";
+		pixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;
+
+		// Support: IE 9 - 11 only
+		// Detect misreporting of content dimensions for box-sizing:border-box elements
+		boxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;
+
+		// Support: IE 9 only
+		// Detect overflow:scroll screwiness (gh-3699)
+		// Support: Chrome <=64
+		// Don't get tricked when zoom affects offsetWidth (gh-4029)
+		div.style.position = "absolute";
+		scrollboxSizeVal = roundPixelMeasures( div.offsetWidth / 3 ) === 12;
+
+		documentElement.removeChild( container );
+
+		// Nullify the div so it wouldn't be stored in the memory and
+		// it will also be a sign that checks already performed
+		div = null;
+	}
+
+	function roundPixelMeasures( measure ) {
+		return Math.round( parseFloat( measure ) );
+	}
+
+	var pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,
+		reliableMarginLeftVal,
+		container = document.createElement( "div" ),
+		div = document.createElement( "div" );
+
+	// Finish early in limited (non-browser) environments
+	if ( !div.style ) {
+		return;
+	}
+
+	// Support: IE <=9 - 11 only
+	// Style of cloned element affects source element cloned (#8908)
+	div.style.backgroundClip = "content-box";
+	div.cloneNode( true ).style.backgroundClip = "";
+	support.clearCloneStyle = div.style.backgroundClip === "content-box";
+
+	jQuery.extend( support, {
+		boxSizingReliable: function() {
+			computeStyleTests();
+			return boxSizingReliableVal;
+		},
+		pixelBoxStyles: function() {
+			computeStyleTests();
+			return pixelBoxStylesVal;
+		},
+		pixelPosition: function() {
+			computeStyleTests();
+			return pixelPositionVal;
+		},
+		reliableMarginLeft: function() {
+			computeStyleTests();
+			return reliableMarginLeftVal;
+		},
+		scrollboxSize: function() {
+			computeStyleTests();
+			return scrollboxSizeVal;
+		}
+	} );
+} )();
+
+
+function curCSS( elem, name, computed ) {
+	var width, minWidth, maxWidth, ret,
+
+		// Support: Firefox 51+
+		// Retrieving style before computed somehow
+		// fixes an issue with getting wrong values
+		// on detached elements
+		style = elem.style;
+
+	computed = computed || getStyles( elem );
+
+	// getPropertyValue is needed for:
+	//   .css('filter') (IE 9 only, #12537)
+	//   .css('--customProperty) (#3144)
+	if ( computed ) {
+		ret = computed.getPropertyValue( name ) || computed[ name ];
+
+		if ( ret === "" && !isAttached( elem ) ) {
+			ret = jQuery.style( elem, name );
+		}
+
+		// A tribute to the "awesome hack by Dean Edwards"
+		// Android Browser returns percentage for some values,
+		// but width seems to be reliably pixels.
+		// This is against the CSSOM draft spec:
+		// https://drafts.csswg.org/cssom/#resolved-values
+		if ( !support.pixelBoxStyles() && rnumnonpx.test( ret ) && rboxStyle.test( name ) ) {
+
+			// Remember the original values
+			width = style.width;
+			minWidth = style.minWidth;
+			maxWidth = style.maxWidth;
+
+			// Put in the new values to get a computed value out
+			style.minWidth = style.maxWidth = style.width = ret;
+			ret = computed.width;
+
+			// Revert the changed values
+			style.width = width;
+			style.minWidth = minWidth;
+			style.maxWidth = maxWidth;
+		}
+	}
+
+	return ret !== undefined ?
+
+		// Support: IE <=9 - 11 only
+		// IE returns zIndex value as an integer.
+		ret + "" :
+		ret;
+}
+
+
+function addGetHookIf( conditionFn, hookFn ) {
+
+	// Define the hook, we'll check on the first run if it's really needed.
+	return {
+		get: function() {
+			if ( conditionFn() ) {
+
+				// Hook not needed (or it's not possible to use it due
+				// to missing dependency), remove it.
+				delete this.get;
+				return;
+			}
+
+			// Hook needed; redefine it so that the support test is not executed again.
+			return ( this.get = hookFn ).apply( this, arguments );
+		}
+	};
+}
+
+
+var cssPrefixes = [ "Webkit", "Moz", "ms" ],
+	emptyStyle = document.createElement( "div" ).style,
+	vendorProps = {};
+
+// Return a vendor-prefixed property or undefined
+function vendorPropName( name ) {
+
+	// Check for vendor prefixed names
+	var capName = name[ 0 ].toUpperCase() + name.slice( 1 ),
+		i = cssPrefixes.length;
+
+	while ( i-- ) {
+		name = cssPrefixes[ i ] + capName;
+		if ( name in emptyStyle ) {
+			return name;
+		}
+	}
+}
+
+// Return a potentially-mapped jQuery.cssProps or vendor prefixed property
+function finalPropName( name ) {
+	var final = jQuery.cssProps[ name ] || vendorProps[ name ];
+
+	if ( final ) {
+		return final;
+	}
+	if ( name in emptyStyle ) {
+		return name;
+	}
+	return vendorProps[ name ] = vendorPropName( name ) || name;
+}
+
+
+var
+
+	// Swappable if display is none or starts with table
+	// except "table", "table-cell", or "table-caption"
+	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
+	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
+	rcustomProp = /^--/,
+	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
+	cssNormalTransform = {
+		letterSpacing: "0",
+		fontWeight: "400"
+	};
+
+function setPositiveNumber( elem, value, subtract ) {
+
+	// Any relative (+/-) values have already been
+	// normalized at this point
+	var matches = rcssNum.exec( value );
+	return matches ?
+
+		// Guard against undefined "subtract", e.g., when used as in cssHooks
+		Math.max( 0, matches[ 2 ] - ( subtract || 0 ) ) + ( matches[ 3 ] || "px" ) :
+		value;
+}
+
+function boxModelAdjustment( elem, dimension, box, isBorderBox, styles, computedVal ) {
+	var i = dimension === "width" ? 1 : 0,
+		extra = 0,
+		delta = 0;
+
+	// Adjustment may not be necessary
+	if ( box === ( isBorderBox ? "border" : "content" ) ) {
+		return 0;
+	}
+
+	for ( ; i < 4; i += 2 ) {
+
+		// Both box models exclude margin
+		if ( box === "margin" ) {
+			delta += jQuery.css( elem, box + cssExpand[ i ], true, styles );
+		}
+
+		// If we get here with a content-box, we're seeking "padding" or "border" or "margin"
+		if ( !isBorderBox ) {
+
+			// Add padding
+			delta += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
+
+			// For "border" or "margin", add border
+			if ( box !== "padding" ) {
+				delta += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+
+			// But still keep track of it otherwise
+			} else {
+				extra += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+			}
+
+		// If we get here with a border-box (content + padding + border), we're seeking "content" or
+		// "padding" or "margin"
+		} else {
+
+			// For "content", subtract padding
+			if ( box === "content" ) {
+				delta -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
+			}
+
+			// For "content" or "padding", subtract border
+			if ( box !== "margin" ) {
+				delta -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+			}
+		}
+	}
+
+	// Account for positive content-box scroll gutter when requested by providing computedVal
+	if ( !isBorderBox && computedVal >= 0 ) {
+
+		// offsetWidth/offsetHeight is a rounded sum of content, padding, scroll gutter, and border
+		// Assuming integer scroll gutter, subtract the rest and round down
+		delta += Math.max( 0, Math.ceil(
+			elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
+			computedVal -
+			delta -
+			extra -
+			0.5
+
+		// If offsetWidth/offsetHeight is unknown, then we can't determine content-box scroll gutter
+		// Use an explicit zero to avoid NaN (gh-3964)
+		) ) || 0;
+	}
+
+	return delta;
+}
+
+function getWidthOrHeight( elem, dimension, extra ) {
+
+	// Start with computed style
+	var styles = getStyles( elem ),
+
+		// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-4322).
+		// Fake content-box until we know it's needed to know the true value.
+		boxSizingNeeded = !support.boxSizingReliable() || extra,
+		isBorderBox = boxSizingNeeded &&
+			jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+		valueIsBorderBox = isBorderBox,
+
+		val = curCSS( elem, dimension, styles ),
+		offsetProp = "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );
+
+	// Support: Firefox <=54
+	// Return a confounding non-pixel value or feign ignorance, as appropriate.
+	if ( rnumnonpx.test( val ) ) {
+		if ( !extra ) {
+			return val;
+		}
+		val = "auto";
+	}
+
+
+	// Fall back to offsetWidth/offsetHeight when value is "auto"
+	// This happens for inline elements with no explicit setting (gh-3571)
+	// Support: Android <=4.1 - 4.3 only
+	// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)
+	// Support: IE 9-11 only
+	// Also use offsetWidth/offsetHeight for when box sizing is unreliable
+	// We use getClientRects() to check for hidden/disconnected.
+	// In those cases, the computed value can be trusted to be border-box
+	if ( ( !support.boxSizingReliable() && isBorderBox ||
+		val === "auto" ||
+		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) &&
+		elem.getClientRects().length ) {
+
+		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
+
+		// Where available, offsetWidth/offsetHeight approximate border box dimensions.
+		// Where not available (e.g., SVG), assume unreliable box-sizing and interpret the
+		// retrieved value as a content box dimension.
+		valueIsBorderBox = offsetProp in elem;
+		if ( valueIsBorderBox ) {
+			val = elem[ offsetProp ];
+		}
+	}
+
+	// Normalize "" and auto
+	val = parseFloat( val ) || 0;
+
+	// Adjust for the element's box model
+	return ( val +
+		boxModelAdjustment(
+			elem,
+			dimension,
+			extra || ( isBorderBox ? "border" : "content" ),
+			valueIsBorderBox,
+			styles,
+
+			// Provide the current computed size to request scroll gutter calculation (gh-3589)
+			val
+		)
+	) + "px";
+}
+
+jQuery.extend( {
+
+	// Add in style property hooks for overriding the default
+	// behavior of getting and setting a style property
+	cssHooks: {
+		opacity: {
+			get: function( elem, computed ) {
+				if ( computed ) {
+
+					// We should always get a number back from opacity
+					var ret = curCSS( elem, "opacity" );
+					return ret === "" ? "1" : ret;
+				}
+			}
+		}
+	},
+
+	// Don't automatically add "px" to these possibly-unitless properties
+	cssNumber: {
+		"animationIterationCount": true,
+		"columnCount": true,
+		"fillOpacity": true,
+		"flexGrow": true,
+		"flexShrink": true,
+		"fontWeight": true,
+		"gridArea": true,
+		"gridColumn": true,
+		"gridColumnEnd": true,
+		"gridColumnStart": true,
+		"gridRow": true,
+		"gridRowEnd": true,
+		"gridRowStart": true,
+		"lineHeight": true,
+		"opacity": true,
+		"order": true,
+		"orphans": true,
+		"widows": true,
+		"zIndex": true,
+		"zoom": true
+	},
+
+	// Add in properties whose names you wish to fix before
+	// setting or getting the value
+	cssProps: {},
+
+	// Get and set the style property on a DOM Node
+	style: function( elem, name, value, extra ) {
+
+		// Don't set styles on text and comment nodes
+		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
+			return;
+		}
+
+		// Make sure that we're working with the right name
+		var ret, type, hooks,
+			origName = camelCase( name ),
+			isCustomProp = rcustomProp.test( name ),
+			style = elem.style;
+
+		// Make sure that we're working with the right name. We don't
+		// want to query the value if it is a CSS custom property
+		// since they are user-defined.
+		if ( !isCustomProp ) {
+			name = finalPropName( origName );
+		}
+
+		// Gets hook for the prefixed version, then unprefixed version
+		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
+
+		// Check if we're setting a value
+		if ( value !== undefined ) {
+			type = typeof value;
+
+			// Convert "+=" or "-=" to relative numbers (#7345)
+			if ( type === "string" && ( ret = rcssNum.exec( value ) ) && ret[ 1 ] ) {
+				value = adjustCSS( elem, name, ret );
+
+				// Fixes bug #9237
+				type = "number";
+			}
+
+			// Make sure that null and NaN values aren't set (#7116)
+			if ( value == null || value !== value ) {
+				return;
+			}
+
+			// If a number was passed in, add the unit (except for certain CSS properties)
+			// The isCustomProp check can be removed in jQuery 4.0 when we only auto-append
+			// "px" to a few hardcoded values.
+			if ( type === "number" && !isCustomProp ) {
+				value += ret && ret[ 3 ] || ( jQuery.cssNumber[ origName ] ? "" : "px" );
+			}
+
+			// background-* props affect original clone's values
+			if ( !support.clearCloneStyle && value === "" && name.indexOf( "background" ) === 0 ) {
+				style[ name ] = "inherit";
+			}
+
+			// If a hook was provided, use that value, otherwise just set the specified value
+			if ( !hooks || !( "set" in hooks ) ||
+				( value = hooks.set( elem, value, extra ) ) !== undefined ) {
+
+				if ( isCustomProp ) {
+					style.setProperty( name, value );
+				} else {
+					style[ name ] = value;
+				}
+			}
+
+		} else {
+
+			// If a hook was provided get the non-computed value from there
+			if ( hooks && "get" in hooks &&
+				( ret = hooks.get( elem, false, extra ) ) !== undefined ) {
+
+				return ret;
+			}
+
+			// Otherwise just get the value from the style object
+			return style[ name ];
+		}
+	},
+
+	css: function( elem, name, extra, styles ) {
+		var val, num, hooks,
+			origName = camelCase( name ),
+			isCustomProp = rcustomProp.test( name );
+
+		// Make sure that we're working with the right name. We don't
+		// want to modify the value if it is a CSS custom property
+		// since they are user-defined.
+		if ( !isCustomProp ) {
+			name = finalPropName( origName );
+		}
+
+		// Try prefixed name followed by the unprefixed name
+		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
+
+		// If a hook was provided get the computed value from there
+		if ( hooks && "get" in hooks ) {
+			val = hooks.get( elem, true, extra );
+		}
+
+		// Otherwise, if a way to get the computed value exists, use that
+		if ( val === undefined ) {
+			val = curCSS( elem, name, styles );
+		}
+
+		// Convert "normal" to computed value
+		if ( val === "normal" && name in cssNormalTransform ) {
+			val = cssNormalTransform[ name ];
+		}
+
+		// Make numeric if forced or a qualifier was provided and val looks numeric
+		if ( extra === "" || extra ) {
+			num = parseFloat( val );
+			return extra === true || isFinite( num ) ? num || 0 : val;
+		}
+
+		return val;
+	}
+} );
+
+jQuery.each( [ "height", "width" ], function( i, dimension ) {
+	jQuery.cssHooks[ dimension ] = {
+		get: function( elem, computed, extra ) {
+			if ( computed ) {
+
+				// Certain elements can have dimension info if we invisibly show them
+				// but it must have a current display style that would benefit
+				return rdisplayswap.test( jQuery.css( elem, "display" ) ) &&
+
+					// Support: Safari 8+
+					// Table columns in Safari have non-zero offsetWidth & zero
+					// getBoundingClientRect().width unless display is changed.
+					// Support: IE <=11 only
+					// Running getBoundingClientRect on a disconnected node
+					// in IE throws an error.
+					( !elem.getClientRects().length || !elem.getBoundingClientRect().width ) ?
+						swap( elem, cssShow, function() {
+							return getWidthOrHeight( elem, dimension, extra );
+						} ) :
+						getWidthOrHeight( elem, dimension, extra );
+			}
+		},
+
+		set: function( elem, value, extra ) {
+			var matches,
+				styles = getStyles( elem ),
+
+				// Only read styles.position if the test has a chance to fail
+				// to avoid forcing a reflow.
+				scrollboxSizeBuggy = !support.scrollboxSize() &&
+					styles.position === "absolute",
+
+				// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-3991)
+				boxSizingNeeded = scrollboxSizeBuggy || extra,
+				isBorderBox = boxSizingNeeded &&
+					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+				subtract = extra ?
+					boxModelAdjustment(
+						elem,
+						dimension,
+						extra,
+						isBorderBox,
+						styles
+					) :
+					0;
+
+			// Account for unreliable border-box dimensions by comparing offset* to computed and
+			// faking a content-box to get border and padding (gh-3699)
+			if ( isBorderBox && scrollboxSizeBuggy ) {
+				subtract -= Math.ceil(
+					elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
+					parseFloat( styles[ dimension ] ) -
+					boxModelAdjustment( elem, dimension, "border", false, styles ) -
+					0.5
+				);
+			}
+
+			// Convert to pixels if value adjustment is needed
+			if ( subtract && ( matches = rcssNum.exec( value ) ) &&
+				( matches[ 3 ] || "px" ) !== "px" ) {
+
+				elem.style[ dimension ] = value;
+				value = jQuery.css( elem, dimension );
+			}
+
+			return setPositiveNumber( elem, value, subtract );
+		}
+	};
+} );
+
+jQuery.cssHooks.marginLeft = addGetHookIf( support.reliableMarginLeft,
+	function( elem, computed ) {
+		if ( computed ) {
+			return ( parseFloat( curCSS( elem, "marginLeft" ) ) ||
+				elem.getBoundingClientRect().left -
+					swap( elem, { marginLeft: 0 }, function() {
+						return elem.getBoundingClientRect().left;
+					} )
+				) + "px";
+		}
+	}
+);
+
+// These hooks are used by animate to expand properties
+jQuery.each( {
+	margin: "",
+	padding: "",
+	border: "Width"
+}, function( prefix, suffix ) {
+	jQuery.cssHooks[ prefix + suffix ] = {
+		expand: function( value ) {
+			var i = 0,
+				expanded = {},
+
+				// Assumes a single number if not a string
+				parts = typeof value === "string" ? value.split( " " ) : [ value ];
+
+			for ( ; i < 4; i++ ) {
+				expanded[ prefix + cssExpand[ i ] + suffix ] =
+					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
+			}
+
+			return expanded;
+		}
+	};
+
+	if ( prefix !== "margin" ) {
+		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
+	}
+} );
+
+jQuery.fn.extend( {
+	css: function( name, value ) {
+		return access( this, function( elem, name, value ) {
+			var styles, len,
+				map = {},
+				i = 0;
+
+			if ( Array.isArray( name ) ) {
+				styles = getStyles( elem );
+				len = name.length;
+
+				for ( ; i < len; i++ ) {
+					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
+				}
+
+				return map;
+			}
+
+			return value !== undefined ?
+				jQuery.style( elem, name, value ) :
+				jQuery.css( elem, name );
+		}, name, value, arguments.length > 1 );
+	}
+} );
+
+
+function Tween( elem, options, prop, end, easing ) {
+	return new Tween.prototype.init( elem, options, prop, end, easing );
+}
+jQuery.Tween = Tween;
+
+Tween.prototype = {
+	constructor: Tween,
+	init: function( elem, options, prop, end, easing, unit ) {
+		this.elem = elem;
+		this.prop = prop;
+		this.easing = easing || jQuery.easing._default;
+		this.options = options;
+		this.start = this.now = this.cur();
+		this.end = end;
+		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
+	},
+	cur: function() {
+		var hooks = Tween.propHooks[ this.prop ];
+
+		return hooks && hooks.get ?
+			hooks.get( this ) :
+			Tween.propHooks._default.get( this );
+	},
+	run: function( percent ) {
+		var eased,
+			hooks = Tween.propHooks[ this.prop ];
+
+		if ( this.options.duration ) {
+			this.pos = eased = jQuery.easing[ this.easing ](
+				percent, this.options.duration * percent, 0, 1, this.options.duration
+			);
+		} else {
+			this.pos = eased = percent;
+		}
+		this.now = ( this.end - this.start ) * eased + this.start;
+
+		if ( this.options.step ) {
+			this.options.step.call( this.elem, this.now, this );
+		}
+
+		if ( hooks && hooks.set ) {
+			hooks.set( this );
+		} else {
+			Tween.propHooks._default.set( this );
+		}
+		return this;
+	}
+};
+
+Tween.prototype.init.prototype = Tween.prototype;
+
+Tween.propHooks = {
+	_default: {
+		get: function( tween ) {
+			var result;
+
+			// Use a property on the element directly when it is not a DOM element,
+			// or when there is no matching style property that exists.
+			if ( tween.elem.nodeType !== 1 ||
+				tween.elem[ tween.prop ] != null && tween.elem.style[ tween.prop ] == null ) {
+				return tween.elem[ tween.prop ];
+			}
+
+			// Passing an empty string as a 3rd parameter to .css will automatically
+			// attempt a parseFloat and fallback to a string if the parse fails.
+			// Simple values such as "10px" are parsed to Float;
+			// complex values such as "rotate(1rad)" are returned as-is.
+			result = jQuery.css( tween.elem, tween.prop, "" );
+
+			// Empty strings, null, undefined and "auto" are converted to 0.
+			return !result || result === "auto" ? 0 : result;
+		},
+		set: function( tween ) {
+
+			// Use step hook for back compat.
+			// Use cssHook if its there.
+			// Use .style if available and use plain properties where available.
+			if ( jQuery.fx.step[ tween.prop ] ) {
+				jQuery.fx.step[ tween.prop ]( tween );
+			} else if ( tween.elem.nodeType === 1 && (
+					jQuery.cssHooks[ tween.prop ] ||
+					tween.elem.style[ finalPropName( tween.prop ) ] != null ) ) {
+				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
+			} else {
+				tween.elem[ tween.prop ] = tween.now;
+			}
+		}
+	}
+};
+
+// Support: IE <=9 only
+// Panic based approach to setting things on disconnected nodes
+Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
+	set: function( tween ) {
+		if ( tween.elem.nodeType && tween.elem.parentNode ) {
+			tween.elem[ tween.prop ] = tween.now;
+		}
+	}
+};
+
+jQuery.easing = {
+	linear: function( p ) {
+		return p;
+	},
+	swing: function( p ) {
+		return 0.5 - Math.cos( p * Math.PI ) / 2;
+	},
+	_default: "swing"
+};
+
+jQuery.fx = Tween.prototype.init;
+
+// Back compat <1.8 extension point
+jQuery.fx.step = {};
+
+
+
+
+var
+	fxNow, inProgress,
+	rfxtypes = /^(?:toggle|show|hide)$/,
+	rrun = /queueHooks$/;
+
+function schedule() {
+	if ( inProgress ) {
+		if ( document.hidden === false && window.requestAnimationFrame ) {
+			window.requestAnimationFrame( schedule );
+		} else {
+			window.setTimeout( schedule, jQuery.fx.interval );
+		}
+
+		jQuery.fx.tick();
+	}
+}
+
+// Animations created synchronously will run synchronously
+function createFxNow() {
+	window.setTimeout( function() {
+		fxNow = undefined;
+	} );
+	return ( fxNow = Date.now() );
+}
+
+// Generate parameters to create a standard animation
+function genFx( type, includeWidth ) {
+	var which,
+		i = 0,
+		attrs = { height: type };
+
+	// If we include width, step value is 1 to do all cssExpand values,
+	// otherwise step value is 2 to skip over Left and Right
+	includeWidth = includeWidth ? 1 : 0;
+	for ( ; i < 4; i += 2 - includeWidth ) {
+		which = cssExpand[ i ];
+		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
+	}
+
+	if ( includeWidth ) {
+		attrs.opacity = attrs.width = type;
+	}
+
+	return attrs;
+}
+
+function createTween( value, prop, animation ) {
+	var tween,
+		collection = ( Animation.tweeners[ prop ] || [] ).concat( Animation.tweeners[ "*" ] ),
+		index = 0,
+		length = collection.length;
+	for ( ; index < length; index++ ) {
+		if ( ( tween = collection[ index ].call( animation, prop, value ) ) ) {
+
+			// We're done with this property
+			return tween;
+		}
+	}
+}
+
+function defaultPrefilter( elem, props, opts ) {
+	var prop, value, toggle, hooks, oldfire, propTween, restoreDisplay, display,
+		isBox = "width" in props || "height" in props,
+		anim = this,
+		orig = {},
+		style = elem.style,
+		hidden = elem.nodeType && isHiddenWithinTree( elem ),
+		dataShow = dataPriv.get( elem, "fxshow" );
+
+	// Queue-skipping animations hijack the fx hooks
+	if ( !opts.queue ) {
+		hooks = jQuery._queueHooks( elem, "fx" );
+		if ( hooks.unqueued == null ) {
+			hooks.unqueued = 0;
+			oldfire = hooks.empty.fire;
+			hooks.empty.fire = function() {
+				if ( !hooks.unqueued ) {
+					oldfire();
+				}
+			};
+		}
+		hooks.unqueued++;
+
+		anim.always( function() {
+
+			// Ensure the complete handler is called before this completes
+			anim.always( function() {
+				hooks.unqueued--;
+				if ( !jQuery.queue( elem, "fx" ).length ) {
+					hooks.empty.fire();
+				}
+			} );
+		} );
+	}
+
+	// Detect show/hide animations
+	for ( prop in props ) {
+		value = props[ prop ];
+		if ( rfxtypes.test( value ) ) {
+			delete props[ prop ];
+			toggle = toggle || value === "toggle";
+			if ( value === ( hidden ? "hide" : "show" ) ) {
+
+				// Pretend to be hidden if this is a "show" and
+				// there is still data from a stopped show/hide
+				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
+					hidden = true;
+
+				// Ignore all other no-op show/hide data
+				} else {
+					continue;
+				}
+			}
+			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );
+		}
+	}
+
+	// Bail out if this is a no-op like .hide().hide()
+	propTween = !jQuery.isEmptyObject( props );
+	if ( !propTween && jQuery.isEmptyObject( orig ) ) {
+		return;
+	}
+
+	// Restrict "overflow" and "display" styles during box animations
+	if ( isBox && elem.nodeType === 1 ) {
+
+		// Support: IE <=9 - 11, Edge 12 - 15
+		// Record all 3 overflow attributes because IE does not infer the shorthand
+		// from identically-valued overflowX and overflowY and Edge just mirrors
+		// the overflowX value there.
+		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];
+
+		// Identify a display type, preferring old show/hide data over the CSS cascade
+		restoreDisplay = dataShow && dataShow.display;
+		if ( restoreDisplay == null ) {
+			restoreDisplay = dataPriv.get( elem, "display" );
+		}
+		display = jQuery.css( elem, "display" );
+		if ( display === "none" ) {
+			if ( restoreDisplay ) {
+				display = restoreDisplay;
+			} else {
+
+				// Get nonempty value(s) by temporarily forcing visibility
+				showHide( [ elem ], true );
+				restoreDisplay = elem.style.display || restoreDisplay;
+				display = jQuery.css( elem, "display" );
+				showHide( [ elem ] );
+			}
+		}
+
+		// Animate inline elements as inline-block
+		if ( display === "inline" || display === "inline-block" && restoreDisplay != null ) {
+			if ( jQuery.css( elem, "float" ) === "none" ) {
+
+				// Restore the original display value at the end of pure show/hide animations
+				if ( !propTween ) {
+					anim.done( function() {
+						style.display = restoreDisplay;
+					} );
+					if ( restoreDisplay == null ) {
+						display = style.display;
+						restoreDisplay = display === "none" ? "" : display;
+					}
+				}
+				style.display = "inline-block";
+			}
+		}
+	}
+
+	if ( opts.overflow ) {
+		style.overflow = "hidden";
+		anim.always( function() {
+			style.overflow = opts.overflow[ 0 ];
+			style.overflowX = opts.overflow[ 1 ];
+			style.overflowY = opts.overflow[ 2 ];
+		} );
+	}
+
+	// Implement show/hide animations
+	propTween = false;
+	for ( prop in orig ) {
+
+		// General show/hide setup for this element animation
+		if ( !propTween ) {
+			if ( dataShow ) {
+				if ( "hidden" in dataShow ) {
+					hidden = dataShow.hidden;
+				}
+			} else {
+				dataShow = dataPriv.access( elem, "fxshow", { display: restoreDisplay } );
+			}
+
+			// Store hidden/visible for toggle so `.stop().toggle()` "reverses"
+			if ( toggle ) {
+				dataShow.hidden = !hidden;
+			}
+
+			// Show elements before animating them
+			if ( hidden ) {
+				showHide( [ elem ], true );
+			}
+
+			/* eslint-disable no-loop-func */
+
+			anim.done( function() {
+
+			/* eslint-enable no-loop-func */
+
+				// The final step of a "hide" animation is actually hiding the element
+				if ( !hidden ) {
+					showHide( [ elem ] );
+				}
+				dataPriv.remove( elem, "fxshow" );
+				for ( prop in orig ) {
+					jQuery.style( elem, prop, orig[ prop ] );
+				}
+			} );
+		}
+
+		// Per-property setup
+		propTween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );
+		if ( !( prop in dataShow ) ) {
+			dataShow[ prop ] = propTween.start;
+			if ( hidden ) {
+				propTween.end = propTween.start;
+				propTween.start = 0;
+			}
+		}
+	}
+}
+
+function propFilter( props, specialEasing ) {
+	var index, name, easing, value, hooks;
+
+	// camelCase, specialEasing and expand cssHook pass
+	for ( index in props ) {
+		name = camelCase( index );
+		easing = specialEasing[ name ];
+		value = props[ index ];
+		if ( Array.isArray( value ) ) {
+			easing = value[ 1 ];
+			value = props[ index ] = value[ 0 ];
+		}
+
+		if ( index !== name ) {
+			props[ name ] = value;
+			delete props[ index ];
+		}
+
+		hooks = jQuery.cssHooks[ name ];
+		if ( hooks && "expand" in hooks ) {
+			value = hooks.expand( value );
+			delete props[ name ];
+
+			// Not quite $.extend, this won't overwrite existing keys.
+			// Reusing 'index' because we have the correct "name"
+			for ( index in value ) {
+				if ( !( index in props ) ) {
+					props[ index ] = value[ index ];
+					specialEasing[ index ] = easing;
+				}
+			}
+		} else {
+			specialEasing[ name ] = easing;
+		}
+	}
+}
+
+function Animation( elem, properties, options ) {
+	var result,
+		stopped,
+		index = 0,
+		length = Animation.prefilters.length,
+		deferred = jQuery.Deferred().always( function() {
+
+			// Don't match elem in the :animated selector
+			delete tick.elem;
+		} ),
+		tick = function() {
+			if ( stopped ) {
+				return false;
+			}
+			var currentTime = fxNow || createFxNow(),
+				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
+
+				// Support: Android 2.3 only
+				// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)
+				temp = remaining / animation.duration || 0,
+				percent = 1 - temp,
+				index = 0,
+				length = animation.tweens.length;
+
+			for ( ; index < length; index++ ) {
+				animation.tweens[ index ].run( percent );
+			}
+
+			deferred.notifyWith( elem, [ animation, percent, remaining ] );
+
+			// If there's more to do, yield
+			if ( percent < 1 && length ) {
+				return remaining;
+			}
+
+			// If this was an empty animation, synthesize a final progress notification
+			if ( !length ) {
+				deferred.notifyWith( elem, [ animation, 1, 0 ] );
+			}
+
+			// Resolve the animation and report its conclusion
+			deferred.resolveWith( elem, [ animation ] );
+			return false;
+		},
+		animation = deferred.promise( {
+			elem: elem,
+			props: jQuery.extend( {}, properties ),
+			opts: jQuery.extend( true, {
+				specialEasing: {},
+				easing: jQuery.easing._default
+			}, options ),
+			originalProperties: properties,
+			originalOptions: options,
+			startTime: fxNow || createFxNow(),
+			duration: options.duration,
+			tweens: [],
+			createTween: function( prop, end ) {
+				var tween = jQuery.Tween( elem, animation.opts, prop, end,
+						animation.opts.specialEasing[ prop ] || animation.opts.easing );
+				animation.tweens.push( tween );
+				return tween;
+			},
+			stop: function( gotoEnd ) {
+				var index = 0,
+
+					// If we are going to the end, we want to run all the tweens
+					// otherwise we skip this part
+					length = gotoEnd ? animation.tweens.length : 0;
+				if ( stopped ) {
+					return this;
+				}
+				stopped = true;
+				for ( ; index < length; index++ ) {
+					animation.tweens[ index ].run( 1 );
+				}
+
+				// Resolve when we played the last frame; otherwise, reject
+				if ( gotoEnd ) {
+					deferred.notifyWith( elem, [ animation, 1, 0 ] );
+					deferred.resolveWith( elem, [ animation, gotoEnd ] );
+				} else {
+					deferred.rejectWith( elem, [ animation, gotoEnd ] );
+				}
+				return this;
+			}
+		} ),
+		props = animation.props;
+
+	propFilter( props, animation.opts.specialEasing );
+
+	for ( ; index < length; index++ ) {
+		result = Animation.prefilters[ index ].call( animation, elem, props, animation.opts );
+		if ( result ) {
+			if ( isFunction( result.stop ) ) {
+				jQuery._queueHooks( animation.elem, animation.opts.queue ).stop =
+					result.stop.bind( result );
+			}
+			return result;
+		}
+	}
+
+	jQuery.map( props, createTween, animation );
+
+	if ( isFunction( animation.opts.start ) ) {
+		animation.opts.start.call( elem, animation );
+	}
+
+	// Attach callbacks from options
+	animation
+		.progress( animation.opts.progress )
+		.done( animation.opts.done, animation.opts.complete )
+		.fail( animation.opts.fail )
+		.always( animation.opts.always );
+
+	jQuery.fx.timer(
+		jQuery.extend( tick, {
+			elem: elem,
+			anim: animation,
+			queue: animation.opts.queue
+		} )
+	);
+
+	return animation;
+}
+
+jQuery.Animation = jQuery.extend( Animation, {
+
+	tweeners: {
+		"*": [ function( prop, value ) {
+			var tween = this.createTween( prop, value );
+			adjustCSS( tween.elem, prop, rcssNum.exec( value ), tween );
+			return tween;
+		} ]
+	},
+
+	tweener: function( props, callback ) {
+		if ( isFunction( props ) ) {
+			callback = props;
+			props = [ "*" ];
+		} else {
+			props = props.match( rnothtmlwhite );
+		}
+
+		var prop,
+			index = 0,
+			length = props.length;
+
+		for ( ; index < length; index++ ) {
+			prop = props[ index ];
+			Animation.tweeners[ prop ] = Animation.tweeners[ prop ] || [];
+			Animation.tweeners[ prop ].unshift( callback );
+		}
+	},
+
+	prefilters: [ defaultPrefilter ],
+
+	prefilter: function( callback, prepend ) {
+		if ( prepend ) {
+			Animation.prefilters.unshift( callback );
+		} else {
+			Animation.prefilters.push( callback );
+		}
+	}
+} );
+
+jQuery.speed = function( speed, easing, fn ) {
+	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
+		complete: fn || !fn && easing ||
+			isFunction( speed ) && speed,
+		duration: speed,
+		easing: fn && easing || easing && !isFunction( easing ) && easing
+	};
+
+	// Go to the end state if fx are off
+	if ( jQuery.fx.off ) {
+		opt.duration = 0;
+
+	} else {
+		if ( typeof opt.duration !== "number" ) {
+			if ( opt.duration in jQuery.fx.speeds ) {
+				opt.duration = jQuery.fx.speeds[ opt.duration ];
+
+			} else {
+				opt.duration = jQuery.fx.speeds._default;
+			}
+		}
+	}
+
+	// Normalize opt.queue - true/undefined/null -> "fx"
+	if ( opt.queue == null || opt.queue === true ) {
+		opt.queue = "fx";
+	}
+
+	// Queueing
+	opt.old = opt.complete;
+
+	opt.complete = function() {
+		if ( isFunction( opt.old ) ) {
+			opt.old.call( this );
+		}
+
+		if ( opt.queue ) {
+			jQuery.dequeue( this, opt.queue );
+		}
+	};
+
+	return opt;
+};
+
+jQuery.fn.extend( {
+	fadeTo: function( speed, to, easing, callback ) {
+
+		// Show any hidden elements after setting opacity to 0
+		return this.filter( isHiddenWithinTree ).css( "opacity", 0 ).show()
+
+			// Animate to the value specified
+			.end().animate( { opacity: to }, speed, easing, callback );
+	},
+	animate: function( prop, speed, easing, callback ) {
+		var empty = jQuery.isEmptyObject( prop ),
+			optall = jQuery.speed( speed, easing, callback ),
+			doAnimation = function() {
+
+				// Operate on a copy of prop so per-property easing won't be lost
+				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
+
+				// Empty animations, or finishing resolves immediately
+				if ( empty || dataPriv.get( this, "finish" ) ) {
+					anim.stop( true );
+				}
+			};
+			doAnimation.finish = doAnimation;
+
+		return empty || optall.queue === false ?
+			this.each( doAnimation ) :
+			this.queue( optall.queue, doAnimation );
+	},
+	stop: function( type, clearQueue, gotoEnd ) {
+		var stopQueue = function( hooks ) {
+			var stop = hooks.stop;
+			delete hooks.stop;
+			stop( gotoEnd );
+		};
+
+		if ( typeof type !== "string" ) {
+			gotoEnd = clearQueue;
+			clearQueue = type;
+			type = undefined;
+		}
+		if ( clearQueue && type !== false ) {
+			this.queue( type || "fx", [] );
+		}
+
+		return this.each( function() {
+			var dequeue = true,
+				index = type != null && type + "queueHooks",
+				timers = jQuery.timers,
+				data = dataPriv.get( this );
+
+			if ( index ) {
+				if ( data[ index ] && data[ index ].stop ) {
+					stopQueue( data[ index ] );
+				}
+			} else {
+				for ( index in data ) {
+					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
+						stopQueue( data[ index ] );
+					}
+				}
+			}
+
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this &&
+					( type == null || timers[ index ].queue === type ) ) {
+
+					timers[ index ].anim.stop( gotoEnd );
+					dequeue = false;
+					timers.splice( index, 1 );
+				}
+			}
+
+			// Start the next in the queue if the last step wasn't forced.
+			// Timers currently will call their complete callbacks, which
+			// will dequeue but only if they were gotoEnd.
+			if ( dequeue || !gotoEnd ) {
+				jQuery.dequeue( this, type );
+			}
+		} );
+	},
+	finish: function( type ) {
+		if ( type !== false ) {
+			type = type || "fx";
+		}
+		return this.each( function() {
+			var index,
+				data = dataPriv.get( this ),
+				queue = data[ type + "queue" ],
+				hooks = data[ type + "queueHooks" ],
+				timers = jQuery.timers,
+				length = queue ? queue.length : 0;
+
+			// Enable finishing flag on private data
+			data.finish = true;
+
+			// Empty the queue first
+			jQuery.queue( this, type, [] );
+
+			if ( hooks && hooks.stop ) {
+				hooks.stop.call( this, true );
+			}
+
+			// Look for any active animations, and finish them
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
+					timers[ index ].anim.stop( true );
+					timers.splice( index, 1 );
+				}
+			}
+
+			// Look for any animations in the old queue and finish them
+			for ( index = 0; index < length; index++ ) {
+				if ( queue[ index ] && queue[ index ].finish ) {
+					queue[ index ].finish.call( this );
+				}
+			}
+
+			// Turn off finishing flag
+			delete data.finish;
+		} );
+	}
+} );
+
+jQuery.each( [ "toggle", "show", "hide" ], function( i, name ) {
+	var cssFn = jQuery.fn[ name ];
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return speed == null || typeof speed === "boolean" ?
+			cssFn.apply( this, arguments ) :
+			this.animate( genFx( name, true ), speed, easing, callback );
+	};
+} );
+
+// Generate shortcuts for custom animations
+jQuery.each( {
+	slideDown: genFx( "show" ),
+	slideUp: genFx( "hide" ),
+	slideToggle: genFx( "toggle" ),
+	fadeIn: { opacity: "show" },
+	fadeOut: { opacity: "hide" },
+	fadeToggle: { opacity: "toggle" }
+}, function( name, props ) {
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return this.animate( props, speed, easing, callback );
+	};
+} );
+
+jQuery.timers = [];
+jQuery.fx.tick = function() {
+	var timer,
+		i = 0,
+		timers = jQuery.timers;
+
+	fxNow = Date.now();
+
+	for ( ; i < timers.length; i++ ) {
+		timer = timers[ i ];
+
+		// Run the timer and safely remove it when done (allowing for external removal)
+		if ( !timer() && timers[ i ] === timer ) {
+			timers.splice( i--, 1 );
+		}
+	}
+
+	if ( !timers.length ) {
+		jQuery.fx.stop();
+	}
+	fxNow = undefined;
+};
+
+jQuery.fx.timer = function( timer ) {
+	jQuery.timers.push( timer );
+	jQuery.fx.start();
+};
+
+jQuery.fx.interval = 13;
+jQuery.fx.start = function() {
+	if ( inProgress ) {
+		return;
+	}
+
+	inProgress = true;
+	schedule();
+};
+
+jQuery.fx.stop = function() {
+	inProgress = null;
+};
+
+jQuery.fx.speeds = {
+	slow: 600,
+	fast: 200,
+
+	// Default speed
+	_default: 400
+};
+
+
+// Based off of the plugin by Clint Helfers, with permission.
+// https://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/
+jQuery.fn.delay = function( time, type ) {
+	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
+	type = type || "fx";
+
+	return this.queue( type, function( next, hooks ) {
+		var timeout = window.setTimeout( next, time );
+		hooks.stop = function() {
+			window.clearTimeout( timeout );
+		};
+	} );
+};
+
+
+( function() {
+	var input = document.createElement( "input" ),
+		select = document.createElement( "select" ),
+		opt = select.appendChild( document.createElement( "option" ) );
+
+	input.type = "checkbox";
+
+	// Support: Android <=4.3 only
+	// Default value for a checkbox should be "on"
+	support.checkOn = input.value !== "";
+
+	// Support: IE <=11 only
+	// Must access selectedIndex to make default options select
+	support.optSelected = opt.selected;
+
+	// Support: IE <=11 only
+	// An input loses its value after becoming a radio
+	input = document.createElement( "input" );
+	input.value = "t";
+	input.type = "radio";
+	support.radioValue = input.value === "t";
+} )();
+
+
+var boolHook,
+	attrHandle = jQuery.expr.attrHandle;
+
+jQuery.fn.extend( {
+	attr: function( name, value ) {
+		return access( this, jQuery.attr, name, value, arguments.length > 1 );
+	},
+
+	removeAttr: function( name ) {
+		return this.each( function() {
+			jQuery.removeAttr( this, name );
+		} );
+	}
+} );
+
+jQuery.extend( {
+	attr: function( elem, name, value ) {
+		var ret, hooks,
+			nType = elem.nodeType;
+
+		// Don't get/set attributes on text, comment and attribute nodes
+		if ( nType === 3 || nType === 8 || nType === 2 ) {
+			return;
+		}
+
+		// Fallback to prop when attributes are not supported
+		if ( typeof elem.getAttribute === "undefined" ) {
+			return jQuery.prop( elem, name, value );
+		}
+
+		// Attribute hooks are determined by the lowercase version
+		// Grab necessary hook if one is defined
+		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
+			hooks = jQuery.attrHooks[ name.toLowerCase() ] ||
+				( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );
+		}
+
+		if ( value !== undefined ) {
+			if ( value === null ) {
+				jQuery.removeAttr( elem, name );
+				return;
+			}
+
+			if ( hooks && "set" in hooks &&
+				( ret = hooks.set( elem, value, name ) ) !== undefined ) {
+				return ret;
+			}
+
+			elem.setAttribute( name, value + "" );
+			return value;
+		}
+
+		if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
+			return ret;
+		}
+
+		ret = jQuery.find.attr( elem, name );
+
+		// Non-existent attributes return null, we normalize to undefined
+		return ret == null ? undefined : ret;
+	},
+
+	attrHooks: {
+		type: {
+			set: function( elem, value ) {
+				if ( !support.radioValue && value === "radio" &&
+					nodeName( elem, "input" ) ) {
+					var val = elem.value;
+					elem.setAttribute( "type", value );
+					if ( val ) {
+						elem.value = val;
+					}
+					return value;
+				}
+			}
+		}
+	},
+
+	removeAttr: function( elem, value ) {
+		var name,
+			i = 0,
+
+			// Attribute names can contain non-HTML whitespace characters
+			// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
+			attrNames = value && value.match( rnothtmlwhite );
+
+		if ( attrNames && elem.nodeType === 1 ) {
+			while ( ( name = attrNames[ i++ ] ) ) {
+				elem.removeAttribute( name );
+			}
+		}
+	}
+} );
+
+// Hooks for boolean attributes
+boolHook = {
+	set: function( elem, value, name ) {
+		if ( value === false ) {
+
+			// Remove boolean attributes when set to false
+			jQuery.removeAttr( elem, name );
+		} else {
+			elem.setAttribute( name, name );
+		}
+		return name;
+	}
+};
+
+jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
+	var getter = attrHandle[ name ] || jQuery.find.attr;
+
+	attrHandle[ name ] = function( elem, name, isXML ) {
+		var ret, handle,
+			lowercaseName = name.toLowerCase();
+
+		if ( !isXML ) {
+
+			// Avoid an infinite loop by temporarily removing this function from the getter
+			handle = attrHandle[ lowercaseName ];
+			attrHandle[ lowercaseName ] = ret;
+			ret = getter( elem, name, isXML ) != null ?
+				lowercaseName :
+				null;
+			attrHandle[ lowercaseName ] = handle;
+		}
+		return ret;
+	};
+} );
+
+
+
+
+var rfocusable = /^(?:input|select|textarea|button)$/i,
+	rclickable = /^(?:a|area)$/i;
+
+jQuery.fn.extend( {
+	prop: function( name, value ) {
+		return access( this, jQuery.prop, name, value, arguments.length > 1 );
+	},
+
+	removeProp: function( name ) {
+		return this.each( function() {
+			delete this[ jQuery.propFix[ name ] || name ];
+		} );
+	}
+} );
+
+jQuery.extend( {
+	prop: function( elem, name, value ) {
+		var ret, hooks,
+			nType = elem.nodeType;
+
+		// Don't get/set properties on text, comment and attribute nodes
+		if ( nType === 3 || nType === 8 || nType === 2 ) {
+			return;
+		}
+
+		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
+
+			// Fix name and attach hooks
+			name = jQuery.propFix[ name ] || name;
+			hooks = jQuery.propHooks[ name ];
+		}
+
+		if ( value !== undefined ) {
+			if ( hooks && "set" in hooks &&
+				( ret = hooks.set( elem, value, name ) ) !== undefined ) {
+				return ret;
+			}
+
+			return ( elem[ name ] = value );
+		}
+
+		if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
+			return ret;
+		}
+
+		return elem[ name ];
+	},
+
+	propHooks: {
+		tabIndex: {
+			get: function( elem ) {
+
+				// Support: IE <=9 - 11 only
+				// elem.tabIndex doesn't always return the
+				// correct value when it hasn't been explicitly set
+				// https://web.archive.org/web/20141116233347/http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
+				// Use proper attribute retrieval(#12072)
+				var tabindex = jQuery.find.attr( elem, "tabindex" );
+
+				if ( tabindex ) {
+					return parseInt( tabindex, 10 );
+				}
+
+				if (
+					rfocusable.test( elem.nodeName ) ||
+					rclickable.test( elem.nodeName ) &&
+					elem.href
+				) {
+					return 0;
+				}
+
+				return -1;
+			}
+		}
+	},
+
+	propFix: {
+		"for": "htmlFor",
+		"class": "className"
+	}
+} );
+
+// Support: IE <=11 only
+// Accessing the selectedIndex property
+// forces the browser to respect setting selected
+// on the option
+// The getter ensures a default option is selected
+// when in an optgroup
+// eslint rule "no-unused-expressions" is disabled for this code
+// since it considers such accessions noop
+if ( !support.optSelected ) {
+	jQuery.propHooks.selected = {
+		get: function( elem ) {
+
+			/* eslint no-unused-expressions: "off" */
+
+			var parent = elem.parentNode;
+			if ( parent && parent.parentNode ) {
+				parent.parentNode.selectedIndex;
+			}
+			return null;
+		},
+		set: function( elem ) {
+
+			/* eslint no-unused-expressions: "off" */
+
+			var parent = elem.parentNode;
+			if ( parent ) {
+				parent.selectedIndex;
+
+				if ( parent.parentNode ) {
+					parent.parentNode.selectedIndex;
+				}
+			}
+		}
+	};
+}
+
+jQuery.each( [
+	"tabIndex",
+	"readOnly",
+	"maxLength",
+	"cellSpacing",
+	"cellPadding",
+	"rowSpan",
+	"colSpan",
+	"useMap",
+	"frameBorder",
+	"contentEditable"
+], function() {
+	jQuery.propFix[ this.toLowerCase() ] = this;
+} );
+
+
+
+
+	// Strip and collapse whitespace according to HTML spec
+	// https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace
+	function stripAndCollapse( value ) {
+		var tokens = value.match( rnothtmlwhite ) || [];
+		return tokens.join( " " );
+	}
+
+
+function getClass( elem ) {
+	return elem.getAttribute && elem.getAttribute( "class" ) || "";
+}
+
+function classesToArray( value ) {
+	if ( Array.isArray( value ) ) {
+		return value;
+	}
+	if ( typeof value === "string" ) {
+		return value.match( rnothtmlwhite ) || [];
+	}
+	return [];
+}
+
+jQuery.fn.extend( {
+	addClass: function( value ) {
+		var classes, elem, cur, curValue, clazz, j, finalValue,
+			i = 0;
+
+		if ( isFunction( value ) ) {
+			return this.each( function( j ) {
+				jQuery( this ).addClass( value.call( this, j, getClass( this ) ) );
+			} );
+		}
+
+		classes = classesToArray( value );
+
+		if ( classes.length ) {
+			while ( ( elem = this[ i++ ] ) ) {
+				curValue = getClass( elem );
+				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );
+
+				if ( cur ) {
+					j = 0;
+					while ( ( clazz = classes[ j++ ] ) ) {
+						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
+							cur += clazz + " ";
+						}
+					}
+
+					// Only assign if different to avoid unneeded rendering.
+					finalValue = stripAndCollapse( cur );
+					if ( curValue !== finalValue ) {
+						elem.setAttribute( "class", finalValue );
+					}
+				}
+			}
+		}
+
+		return this;
+	},
+
+	removeClass: function( value ) {
+		var classes, elem, cur, curValue, clazz, j, finalValue,
+			i = 0;
+
+		if ( isFunction( value ) ) {
+			return this.each( function( j ) {
+				jQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );
+			} );
+		}
+
+		if ( !arguments.length ) {
+			return this.attr( "class", "" );
+		}
+
+		classes = classesToArray( value );
+
+		if ( classes.length ) {
+			while ( ( elem = this[ i++ ] ) ) {
+				curValue = getClass( elem );
+
+				// This expression is here for better compressibility (see addClass)
+				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );
+
+				if ( cur ) {
+					j = 0;
+					while ( ( clazz = classes[ j++ ] ) ) {
+
+						// Remove *all* instances
+						while ( cur.indexOf( " " + clazz + " " ) > -1 ) {
+							cur = cur.replace( " " + clazz + " ", " " );
+						}
+					}
+
+					// Only assign if different to avoid unneeded rendering.
+					finalValue = stripAndCollapse( cur );
+					if ( curValue !== finalValue ) {
+						elem.setAttribute( "class", finalValue );
+					}
+				}
+			}
+		}
+
+		return this;
+	},
+
+	toggleClass: function( value, stateVal ) {
+		var type = typeof value,
+			isValidValue = type === "string" || Array.isArray( value );
+
+		if ( typeof stateVal === "boolean" && isValidValue ) {
+			return stateVal ? this.addClass( value ) : this.removeClass( value );
+		}
+
+		if ( isFunction( value ) ) {
+			return this.each( function( i ) {
+				jQuery( this ).toggleClass(
+					value.call( this, i, getClass( this ), stateVal ),
+					stateVal
+				);
+			} );
+		}
+
+		return this.each( function() {
+			var className, i, self, classNames;
+
+			if ( isValidValue ) {
+
+				// Toggle individual class names
+				i = 0;
+				self = jQuery( this );
+				classNames = classesToArray( value );
+
+				while ( ( className = classNames[ i++ ] ) ) {
+
+					// Check each className given, space separated list
+					if ( self.hasClass( className ) ) {
+						self.removeClass( className );
+					} else {
+						self.addClass( className );
+					}
+				}
+
+			// Toggle whole class name
+			} else if ( value === undefined || type === "boolean" ) {
+				className = getClass( this );
+				if ( className ) {
+
+					// Store className if set
+					dataPriv.set( this, "__className__", className );
+				}
+
+				// If the element has a class name or if we're passed `false`,
+				// then remove the whole classname (if there was one, the above saved it).
+				// Otherwise bring back whatever was previously saved (if anything),
+				// falling back to the empty string if nothing was stored.
+				if ( this.setAttribute ) {
+					this.setAttribute( "class",
+						className || value === false ?
+						"" :
+						dataPriv.get( this, "__className__" ) || ""
+					);
+				}
+			}
+		} );
+	},
+
+	hasClass: function( selector ) {
+		var className, elem,
+			i = 0;
+
+		className = " " + selector + " ";
+		while ( ( elem = this[ i++ ] ) ) {
+			if ( elem.nodeType === 1 &&
+				( " " + stripAndCollapse( getClass( elem ) ) + " " ).indexOf( className ) > -1 ) {
+					return true;
+			}
+		}
+
+		return false;
+	}
+} );
+
+
+
+
+var rreturn = /\r/g;
+
+jQuery.fn.extend( {
+	val: function( value ) {
+		var hooks, ret, valueIsFunction,
+			elem = this[ 0 ];
+
+		if ( !arguments.length ) {
+			if ( elem ) {
+				hooks = jQuery.valHooks[ elem.type ] ||
+					jQuery.valHooks[ elem.nodeName.toLowerCase() ];
+
+				if ( hooks &&
+					"get" in hooks &&
+					( ret = hooks.get( elem, "value" ) ) !== undefined
+				) {
+					return ret;
+				}
+
+				ret = elem.value;
+
+				// Handle most common string cases
+				if ( typeof ret === "string" ) {
+					return ret.replace( rreturn, "" );
+				}
+
+				// Handle cases where value is null/undef or number
+				return ret == null ? "" : ret;
+			}
+
+			return;
+		}
+
+		valueIsFunction = isFunction( value );
+
+		return this.each( function( i ) {
+			var val;
+
+			if ( this.nodeType !== 1 ) {
+				return;
+			}
+
+			if ( valueIsFunction ) {
+				val = value.call( this, i, jQuery( this ).val() );
+			} else {
+				val = value;
+			}
+
+			// Treat null/undefined as ""; convert numbers to string
+			if ( val == null ) {
+				val = "";
+
+			} else if ( typeof val === "number" ) {
+				val += "";
+
+			} else if ( Array.isArray( val ) ) {
+				val = jQuery.map( val, function( value ) {
+					return value == null ? "" : value + "";
+				} );
+			}
+
+			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];
+
+			// If set returns undefined, fall back to normal setting
+			if ( !hooks || !( "set" in hooks ) || hooks.set( this, val, "value" ) === undefined ) {
+				this.value = val;
+			}
+		} );
+	}
+} );
+
+jQuery.extend( {
+	valHooks: {
+		option: {
+			get: function( elem ) {
+
+				var val = jQuery.find.attr( elem, "value" );
+				return val != null ?
+					val :
+
+					// Support: IE <=10 - 11 only
+					// option.text throws exceptions (#14686, #14858)
+					// Strip and collapse whitespace
+					// https://html.spec.whatwg.org/#strip-and-collapse-whitespace
+					stripAndCollapse( jQuery.text( elem ) );
+			}
+		},
+		select: {
+			get: function( elem ) {
+				var value, option, i,
+					options = elem.options,
+					index = elem.selectedIndex,
+					one = elem.type === "select-one",
+					values = one ? null : [],
+					max = one ? index + 1 : options.length;
+
+				if ( index < 0 ) {
+					i = max;
+
+				} else {
+					i = one ? index : 0;
+				}
+
+				// Loop through all the selected options
+				for ( ; i < max; i++ ) {
+					option = options[ i ];
+
+					// Support: IE <=9 only
+					// IE8-9 doesn't update selected after form reset (#2551)
+					if ( ( option.selected || i === index ) &&
+
+							// Don't return options that are disabled or in a disabled optgroup
+							!option.disabled &&
+							( !option.parentNode.disabled ||
+								!nodeName( option.parentNode, "optgroup" ) ) ) {
+
+						// Get the specific value for the option
+						value = jQuery( option ).val();
+
+						// We don't need an array for one selects
+						if ( one ) {
+							return value;
+						}
+
+						// Multi-Selects return an array
+						values.push( value );
+					}
+				}
+
+				return values;
+			},
+
+			set: function( elem, value ) {
+				var optionSet, option,
+					options = elem.options,
+					values = jQuery.makeArray( value ),
+					i = options.length;
+
+				while ( i-- ) {
+					option = options[ i ];
+
+					/* eslint-disable no-cond-assign */
+
+					if ( option.selected =
+						jQuery.inArray( jQuery.valHooks.option.get( option ), values ) > -1
+					) {
+						optionSet = true;
+					}
+
+					/* eslint-enable no-cond-assign */
+				}
+
+				// Force browsers to behave consistently when non-matching value is set
+				if ( !optionSet ) {
+					elem.selectedIndex = -1;
+				}
+				return values;
+			}
+		}
+	}
+} );
+
+// Radios and checkboxes getter/setter
+jQuery.each( [ "radio", "checkbox" ], function() {
+	jQuery.valHooks[ this ] = {
+		set: function( elem, value ) {
+			if ( Array.isArray( value ) ) {
+				return ( elem.checked = jQuery.inArray( jQuery( elem ).val(), value ) > -1 );
+			}
+		}
+	};
+	if ( !support.checkOn ) {
+		jQuery.valHooks[ this ].get = function( elem ) {
+			return elem.getAttribute( "value" ) === null ? "on" : elem.value;
+		};
+	}
+} );
+
+
+
+
+// Return jQuery for attributes-only inclusion
+
+
+support.focusin = "onfocusin" in window;
+
+
+var rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
+	stopPropagationCallback = function( e ) {
+		e.stopPropagation();
+	};
+
+jQuery.extend( jQuery.event, {
+
+	trigger: function( event, data, elem, onlyHandlers ) {
+
+		var i, cur, tmp, bubbleType, ontype, handle, special, lastElement,
+			eventPath = [ elem || document ],
+			type = hasOwn.call( event, "type" ) ? event.type : event,
+			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split( "." ) : [];
+
+		cur = lastElement = tmp = elem = elem || document;
+
+		// Don't do events on text and comment nodes
+		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
+			return;
+		}
+
+		// focus/blur morphs to focusin/out; ensure we're not firing them right now
+		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
+			return;
+		}
+
+		if ( type.indexOf( "." ) > -1 ) {
+
+			// Namespaced trigger; create a regexp to match event type in handle()
+			namespaces = type.split( "." );
+			type = namespaces.shift();
+			namespaces.sort();
+		}
+		ontype = type.indexOf( ":" ) < 0 && "on" + type;
+
+		// Caller can pass in a jQuery.Event object, Object, or just an event type string
+		event = event[ jQuery.expando ] ?
+			event :
+			new jQuery.Event( type, typeof event === "object" && event );
+
+		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
+		event.isTrigger = onlyHandlers ? 2 : 3;
+		event.namespace = namespaces.join( "." );
+		event.rnamespace = event.namespace ?
+			new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" ) :
+			null;
+
+		// Clean up the event in case it is being reused
+		event.result = undefined;
+		if ( !event.target ) {
+			event.target = elem;
+		}
+
+		// Clone any incoming data and prepend the event, creating the handler arg list
+		data = data == null ?
+			[ event ] :
+			jQuery.makeArray( data, [ event ] );
+
+		// Allow special events to draw outside the lines
+		special = jQuery.event.special[ type ] || {};
+		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
+			return;
+		}
+
+		// Determine event propagation path in advance, per W3C events spec (#9951)
+		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
+		if ( !onlyHandlers && !special.noBubble && !isWindow( elem ) ) {
+
+			bubbleType = special.delegateType || type;
+			if ( !rfocusMorph.test( bubbleType + type ) ) {
+				cur = cur.parentNode;
+			}
+			for ( ; cur; cur = cur.parentNode ) {
+				eventPath.push( cur );
+				tmp = cur;
+			}
+
+			// Only add window if we got to document (e.g., not plain obj or detached DOM)
+			if ( tmp === ( elem.ownerDocument || document ) ) {
+				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
+			}
+		}
+
+		// Fire handlers on the event path
+		i = 0;
+		while ( ( cur = eventPath[ i++ ] ) && !event.isPropagationStopped() ) {
+			lastElement = cur;
+			event.type = i > 1 ?
+				bubbleType :
+				special.bindType || type;
+
+			// jQuery handler
+			handle = ( dataPriv.get( cur, "events" ) || {} )[ event.type ] &&
+				dataPriv.get( cur, "handle" );
+			if ( handle ) {
+				handle.apply( cur, data );
+			}
+
+			// Native handler
+			handle = ontype && cur[ ontype ];
+			if ( handle && handle.apply && acceptData( cur ) ) {
+				event.result = handle.apply( cur, data );
+				if ( event.result === false ) {
+					event.preventDefault();
+				}
+			}
+		}
+		event.type = type;
+
+		// If nobody prevented the default action, do it now
+		if ( !onlyHandlers && !event.isDefaultPrevented() ) {
+
+			if ( ( !special._default ||
+				special._default.apply( eventPath.pop(), data ) === false ) &&
+				acceptData( elem ) ) {
+
+				// Call a native DOM method on the target with the same name as the event.
+				// Don't do default actions on window, that's where global variables be (#6170)
+				if ( ontype && isFunction( elem[ type ] ) && !isWindow( elem ) ) {
+
+					// Don't re-trigger an onFOO event when we call its FOO() method
+					tmp = elem[ ontype ];
+
+					if ( tmp ) {
+						elem[ ontype ] = null;
+					}
+
+					// Prevent re-triggering of the same event, since we already bubbled it above
+					jQuery.event.triggered = type;
+
+					if ( event.isPropagationStopped() ) {
+						lastElement.addEventListener( type, stopPropagationCallback );
+					}
+
+					elem[ type ]();
+
+					if ( event.isPropagationStopped() ) {
+						lastElement.removeEventListener( type, stopPropagationCallback );
+					}
+
+					jQuery.event.triggered = undefined;
+
+					if ( tmp ) {
+						elem[ ontype ] = tmp;
+					}
+				}
+			}
+		}
+
+		return event.result;
+	},
+
+	// Piggyback on a donor event to simulate a different one
+	// Used only for `focus(in | out)` events
+	simulate: function( type, elem, event ) {
+		var e = jQuery.extend(
+			new jQuery.Event(),
+			event,
+			{
+				type: type,
+				isSimulated: true
+			}
+		);
+
+		jQuery.event.trigger( e, null, elem );
+	}
+
+} );
+
+jQuery.fn.extend( {
+
+	trigger: function( type, data ) {
+		return this.each( function() {
+			jQuery.event.trigger( type, data, this );
+		} );
+	},
+	triggerHandler: function( type, data ) {
+		var elem = this[ 0 ];
+		if ( elem ) {
+			return jQuery.event.trigger( type, data, elem, true );
+		}
+	}
+} );
+
+
+// Support: Firefox <=44
+// Firefox doesn't have focus(in | out) events
+// Related ticket - https://bugzilla.mozilla.org/show_bug.cgi?id=687787
+//
+// Support: Chrome <=48 - 49, Safari <=9.0 - 9.1
+// focus(in | out) events fire after focus & blur events,
+// which is spec violation - http://www.w3.org/TR/DOM-Level-3-Events/#events-focusevent-event-order
+// Related ticket - https://bugs.chromium.org/p/chromium/issues/detail?id=449857
+if ( !support.focusin ) {
+	jQuery.each( { focus: "focusin", blur: "focusout" }, function( orig, fix ) {
+
+		// Attach a single capturing handler on the document while someone wants focusin/focusout
+		var handler = function( event ) {
+			jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ) );
+		};
+
+		jQuery.event.special[ fix ] = {
+			setup: function() {
+				var doc = this.ownerDocument || this,
+					attaches = dataPriv.access( doc, fix );
+
+				if ( !attaches ) {
+					doc.addEventListener( orig, handler, true );
+				}
+				dataPriv.access( doc, fix, ( attaches || 0 ) + 1 );
+			},
+			teardown: function() {
+				var doc = this.ownerDocument || this,
+					attaches = dataPriv.access( doc, fix ) - 1;
+
+				if ( !attaches ) {
+					doc.removeEventListener( orig, handler, true );
+					dataPriv.remove( doc, fix );
+
+				} else {
+					dataPriv.access( doc, fix, attaches );
+				}
+			}
+		};
+	} );
+}
+var location = window.location;
+
+var nonce = Date.now();
+
+var rquery = ( /\?/ );
+
+
+
+// Cross-browser xml parsing
+jQuery.parseXML = function( data ) {
+	var xml;
+	if ( !data || typeof data !== "string" ) {
+		return null;
+	}
+
+	// Support: IE 9 - 11 only
+	// IE throws on parseFromString with invalid input.
+	try {
+		xml = ( new window.DOMParser() ).parseFromString( data, "text/xml" );
+	} catch ( e ) {
+		xml = undefined;
+	}
+
+	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
+		jQuery.error( "Invalid XML: " + data );
+	}
+	return xml;
+};
+
+
+var
+	rbracket = /\[\]$/,
+	rCRLF = /\r?\n/g,
+	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
+	rsubmittable = /^(?:input|select|textarea|keygen)/i;
+
+function buildParams( prefix, obj, traditional, add ) {
+	var name;
+
+	if ( Array.isArray( obj ) ) {
+
+		// Serialize array item.
+		jQuery.each( obj, function( i, v ) {
+			if ( traditional || rbracket.test( prefix ) ) {
+
+				// Treat each array item as a scalar.
+				add( prefix, v );
+
+			} else {
+
+				// Item is non-scalar (array or object), encode its numeric index.
+				buildParams(
+					prefix + "[" + ( typeof v === "object" && v != null ? i : "" ) + "]",
+					v,
+					traditional,
+					add
+				);
+			}
+		} );
+
+	} else if ( !traditional && toType( obj ) === "object" ) {
+
+		// Serialize object item.
+		for ( name in obj ) {
+			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
+		}
+
+	} else {
+
+		// Serialize scalar item.
+		add( prefix, obj );
+	}
+}
+
+// Serialize an array of form elements or a set of
+// key/values into a query string
+jQuery.param = function( a, traditional ) {
+	var prefix,
+		s = [],
+		add = function( key, valueOrFunction ) {
+
+			// If value is a function, invoke it and use its return value
+			var value = isFunction( valueOrFunction ) ?
+				valueOrFunction() :
+				valueOrFunction;
+
+			s[ s.length ] = encodeURIComponent( key ) + "=" +
+				encodeURIComponent( value == null ? "" : value );
+		};
+
+	if ( a == null ) {
+		return "";
+	}
+
+	// If an array was passed in, assume that it is an array of form elements.
+	if ( Array.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
+
+		// Serialize the form elements
+		jQuery.each( a, function() {
+			add( this.name, this.value );
+		} );
+
+	} else {
+
+		// If traditional, encode the "old" way (the way 1.3.2 or older
+		// did it), otherwise encode params recursively.
+		for ( prefix in a ) {
+			buildParams( prefix, a[ prefix ], traditional, add );
+		}
+	}
+
+	// Return the resulting serialization
+	return s.join( "&" );
+};
+
+jQuery.fn.extend( {
+	serialize: function() {
+		return jQuery.param( this.serializeArray() );
+	},
+	serializeArray: function() {
+		return this.map( function() {
+
+			// Can add propHook for "elements" to filter or add form elements
+			var elements = jQuery.prop( this, "elements" );
+			return elements ? jQuery.makeArray( elements ) : this;
+		} )
+		.filter( function() {
+			var type = this.type;
+
+			// Use .is( ":disabled" ) so that fieldset[disabled] works
+			return this.name && !jQuery( this ).is( ":disabled" ) &&
+				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
+				( this.checked || !rcheckableType.test( type ) );
+		} )
+		.map( function( i, elem ) {
+			var val = jQuery( this ).val();
+
+			if ( val == null ) {
+				return null;
+			}
+
+			if ( Array.isArray( val ) ) {
+				return jQuery.map( val, function( val ) {
+					return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
+				} );
+			}
+
+			return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
+		} ).get();
+	}
+} );
+
+
+var
+	r20 = /%20/g,
+	rhash = /#.*$/,
+	rantiCache = /([?&])_=[^&]*/,
+	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
+
+	// #7653, #8125, #8152: local protocol detection
+	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
+	rnoContent = /^(?:GET|HEAD)$/,
+	rprotocol = /^\/\//,
+
+	/* Prefilters
+	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
+	 * 2) These are called:
+	 *    - BEFORE asking for a transport
+	 *    - AFTER param serialization (s.data is a string if s.processData is true)
+	 * 3) key is the dataType
+	 * 4) the catchall symbol "*" can be used
+	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
+	 */
+	prefilters = {},
+
+	/* Transports bindings
+	 * 1) key is the dataType
+	 * 2) the catchall symbol "*" can be used
+	 * 3) selection will start with transport dataType and THEN go to "*" if needed
+	 */
+	transports = {},
+
+	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
+	allTypes = "*/".concat( "*" ),
+
+	// Anchor tag for parsing the document origin
+	originAnchor = document.createElement( "a" );
+	originAnchor.href = location.href;
+
+// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
+function addToPrefiltersOrTransports( structure ) {
+
+	// dataTypeExpression is optional and defaults to "*"
+	return function( dataTypeExpression, func ) {
+
+		if ( typeof dataTypeExpression !== "string" ) {
+			func = dataTypeExpression;
+			dataTypeExpression = "*";
+		}
+
+		var dataType,
+			i = 0,
+			dataTypes = dataTypeExpression.toLowerCase().match( rnothtmlwhite ) || [];
+
+		if ( isFunction( func ) ) {
+
+			// For each dataType in the dataTypeExpression
+			while ( ( dataType = dataTypes[ i++ ] ) ) {
+
+				// Prepend if requested
+				if ( dataType[ 0 ] === "+" ) {
+					dataType = dataType.slice( 1 ) || "*";
+					( structure[ dataType ] = structure[ dataType ] || [] ).unshift( func );
+
+				// Otherwise append
+				} else {
+					( structure[ dataType ] = structure[ dataType ] || [] ).push( func );
+				}
+			}
+		}
+	};
+}
+
+// Base inspection function for prefilters and transports
+function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {
+
+	var inspected = {},
+		seekingTransport = ( structure === transports );
+
+	function inspect( dataType ) {
+		var selected;
+		inspected[ dataType ] = true;
+		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
+			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
+			if ( typeof dataTypeOrTransport === "string" &&
+				!seekingTransport && !inspected[ dataTypeOrTransport ] ) {
+
+				options.dataTypes.unshift( dataTypeOrTransport );
+				inspect( dataTypeOrTransport );
+				return false;
+			} else if ( seekingTransport ) {
+				return !( selected = dataTypeOrTransport );
+			}
+		} );
+		return selected;
+	}
+
+	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
+}
+
+// A special extend for ajax options
+// that takes "flat" options (not to be deep extended)
+// Fixes #9887
+function ajaxExtend( target, src ) {
+	var key, deep,
+		flatOptions = jQuery.ajaxSettings.flatOptions || {};
+
+	for ( key in src ) {
+		if ( src[ key ] !== undefined ) {
+			( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];
+		}
+	}
+	if ( deep ) {
+		jQuery.extend( true, target, deep );
+	}
+
+	return target;
+}
+
+/* Handles responses to an ajax request:
+ * - finds the right dataType (mediates between content-type and expected dataType)
+ * - returns the corresponding response
+ */
+function ajaxHandleResponses( s, jqXHR, responses ) {
+
+	var ct, type, finalDataType, firstDataType,
+		contents = s.contents,
+		dataTypes = s.dataTypes;
+
+	// Remove auto dataType and get content-type in the process
+	while ( dataTypes[ 0 ] === "*" ) {
+		dataTypes.shift();
+		if ( ct === undefined ) {
+			ct = s.mimeType || jqXHR.getResponseHeader( "Content-Type" );
+		}
+	}
+
+	// Check if we're dealing with a known content-type
+	if ( ct ) {
+		for ( type in contents ) {
+			if ( contents[ type ] && contents[ type ].test( ct ) ) {
+				dataTypes.unshift( type );
+				break;
+			}
+		}
+	}
+
+	// Check to see if we have a response for the expected dataType
+	if ( dataTypes[ 0 ] in responses ) {
+		finalDataType = dataTypes[ 0 ];
+	} else {
+
+		// Try convertible dataTypes
+		for ( type in responses ) {
+			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[ 0 ] ] ) {
+				finalDataType = type;
+				break;
+			}
+			if ( !firstDataType ) {
+				firstDataType = type;
+			}
+		}
+
+		// Or just use first one
+		finalDataType = finalDataType || firstDataType;
+	}
+
+	// If we found a dataType
+	// We add the dataType to the list if needed
+	// and return the corresponding response
+	if ( finalDataType ) {
+		if ( finalDataType !== dataTypes[ 0 ] ) {
+			dataTypes.unshift( finalDataType );
+		}
+		return responses[ finalDataType ];
+	}
+}
+
+/* Chain conversions given the request and the original response
+ * Also sets the responseXXX fields on the jqXHR instance
+ */
+function ajaxConvert( s, response, jqXHR, isSuccess ) {
+	var conv2, current, conv, tmp, prev,
+		converters = {},
+
+		// Work with a copy of dataTypes in case we need to modify it for conversion
+		dataTypes = s.dataTypes.slice();
+
+	// Create converters map with lowercased keys
+	if ( dataTypes[ 1 ] ) {
+		for ( conv in s.converters ) {
+			converters[ conv.toLowerCase() ] = s.converters[ conv ];
+		}
+	}
+
+	current = dataTypes.shift();
+
+	// Convert to each sequential dataType
+	while ( current ) {
+
+		if ( s.responseFields[ current ] ) {
+			jqXHR[ s.responseFields[ current ] ] = response;
+		}
+
+		// Apply the dataFilter if provided
+		if ( !prev && isSuccess && s.dataFilter ) {
+			response = s.dataFilter( response, s.dataType );
+		}
+
+		prev = current;
+		current = dataTypes.shift();
+
+		if ( current ) {
+
+			// There's only work to do if current dataType is non-auto
+			if ( current === "*" ) {
+
+				current = prev;
+
+			// Convert response if prev dataType is non-auto and differs from current
+			} else if ( prev !== "*" && prev !== current ) {
+
+				// Seek a direct converter
+				conv = converters[ prev + " " + current ] || converters[ "* " + current ];
+
+				// If none found, seek a pair
+				if ( !conv ) {
+					for ( conv2 in converters ) {
+
+						// If conv2 outputs current
+						tmp = conv2.split( " " );
+						if ( tmp[ 1 ] === current ) {
+
+							// If prev can be converted to accepted input
+							conv = converters[ prev + " " + tmp[ 0 ] ] ||
+								converters[ "* " + tmp[ 0 ] ];
+							if ( conv ) {
+
+								// Condense equivalence converters
+								if ( conv === true ) {
+									conv = converters[ conv2 ];
+
+								// Otherwise, insert the intermediate dataType
+								} else if ( converters[ conv2 ] !== true ) {
+									current = tmp[ 0 ];
+									dataTypes.unshift( tmp[ 1 ] );
+								}
+								break;
+							}
+						}
+					}
+				}
+
+				// Apply converter (if not an equivalence)
+				if ( conv !== true ) {
+
+					// Unless errors are allowed to bubble, catch and return them
+					if ( conv && s.throws ) {
+						response = conv( response );
+					} else {
+						try {
+							response = conv( response );
+						} catch ( e ) {
+							return {
+								state: "parsererror",
+								error: conv ? e : "No conversion from " + prev + " to " + current
+							};
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return { state: "success", data: response };
+}
+
+jQuery.extend( {
+
+	// Counter for holding the number of active queries
+	active: 0,
+
+	// Last-Modified header cache for next request
+	lastModified: {},
+	etag: {},
+
+	ajaxSettings: {
+		url: location.href,
+		type: "GET",
+		isLocal: rlocalProtocol.test( location.protocol ),
+		global: true,
+		processData: true,
+		async: true,
+		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
+
+		/*
+		timeout: 0,
+		data: null,
+		dataType: null,
+		username: null,
+		password: null,
+		cache: null,
+		throws: false,
+		traditional: false,
+		headers: {},
+		*/
+
+		accepts: {
+			"*": allTypes,
+			text: "text/plain",
+			html: "text/html",
+			xml: "application/xml, text/xml",
+			json: "application/json, text/javascript"
+		},
+
+		contents: {
+			xml: /\bxml\b/,
+			html: /\bhtml/,
+			json: /\bjson\b/
+		},
+
+		responseFields: {
+			xml: "responseXML",
+			text: "responseText",
+			json: "responseJSON"
+		},
+
+		// Data converters
+		// Keys separate source (or catchall "*") and destination types with a single space
+		converters: {
+
+			// Convert anything to text
+			"* text": String,
+
+			// Text to html (true = no transformation)
+			"text html": true,
+
+			// Evaluate text as a json expression
+			"text json": JSON.parse,
+
+			// Parse text as xml
+			"text xml": jQuery.parseXML
+		},
+
+		// For options that shouldn't be deep extended:
+		// you can add your own custom options here if
+		// and when you create one that shouldn't be
+		// deep extended (see ajaxExtend)
+		flatOptions: {
+			url: true,
+			context: true
+		}
+	},
+
+	// Creates a full fledged settings object into target
+	// with both ajaxSettings and settings fields.
+	// If target is omitted, writes into ajaxSettings.
+	ajaxSetup: function( target, settings ) {
+		return settings ?
+
+			// Building a settings object
+			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
+
+			// Extending ajaxSettings
+			ajaxExtend( jQuery.ajaxSettings, target );
+	},
+
+	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
+	ajaxTransport: addToPrefiltersOrTransports( transports ),
+
+	// Main method
+	ajax: function( url, options ) {
+
+		// If url is an object, simulate pre-1.5 signature
+		if ( typeof url === "object" ) {
+			options = url;
+			url = undefined;
+		}
+
+		// Force options to be an object
+		options = options || {};
+
+		var transport,
+
+			// URL without anti-cache param
+			cacheURL,
+
+			// Response headers
+			responseHeadersString,
+			responseHeaders,
+
+			// timeout handle
+			timeoutTimer,
+
+			// Url cleanup var
+			urlAnchor,
+
+			// Request state (becomes false upon send and true upon completion)
+			completed,
+
+			// To know if global events are to be dispatched
+			fireGlobals,
+
+			// Loop variable
+			i,
+
+			// uncached part of the url
+			uncached,
+
+			// Create the final options object
+			s = jQuery.ajaxSetup( {}, options ),
+
+			// Callbacks context
+			callbackContext = s.context || s,
+
+			// Context for global events is callbackContext if it is a DOM node or jQuery collection
+			globalEventContext = s.context &&
+				( callbackContext.nodeType || callbackContext.jquery ) ?
+					jQuery( callbackContext ) :
+					jQuery.event,
+
+			// Deferreds
+			deferred = jQuery.Deferred(),
+			completeDeferred = jQuery.Callbacks( "once memory" ),
+
+			// Status-dependent callbacks
+			statusCode = s.statusCode || {},
+
+			// Headers (they are sent all at once)
+			requestHeaders = {},
+			requestHeadersNames = {},
+
+			// Default abort message
+			strAbort = "canceled",
+
+			// Fake xhr
+			jqXHR = {
+				readyState: 0,
+
+				// Builds headers hashtable if needed
+				getResponseHeader: function( key ) {
+					var match;
+					if ( completed ) {
+						if ( !responseHeaders ) {
+							responseHeaders = {};
+							while ( ( match = rheaders.exec( responseHeadersString ) ) ) {
+								responseHeaders[ match[ 1 ].toLowerCase() + " " ] =
+									( responseHeaders[ match[ 1 ].toLowerCase() + " " ] || [] )
+										.concat( match[ 2 ] );
+							}
+						}
+						match = responseHeaders[ key.toLowerCase() + " " ];
+					}
+					return match == null ? null : match.join( ", " );
+				},
+
+				// Raw string
+				getAllResponseHeaders: function() {
+					return completed ? responseHeadersString : null;
+				},
+
+				// Caches the header
+				setRequestHeader: function( name, value ) {
+					if ( completed == null ) {
+						name = requestHeadersNames[ name.toLowerCase() ] =
+							requestHeadersNames[ name.toLowerCase() ] || name;
+						requestHeaders[ name ] = value;
+					}
+					return this;
+				},
+
+				// Overrides response content-type header
+				overrideMimeType: function( type ) {
+					if ( completed == null ) {
+						s.mimeType = type;
+					}
+					return this;
+				},
+
+				// Status-dependent callbacks
+				statusCode: function( map ) {
+					var code;
+					if ( map ) {
+						if ( completed ) {
+
+							// Execute the appropriate callbacks
+							jqXHR.always( map[ jqXHR.status ] );
+						} else {
+
+							// Lazy-add the new callbacks in a way that preserves old ones
+							for ( code in map ) {
+								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
+							}
+						}
+					}
+					return this;
+				},
+
+				// Cancel the request
+				abort: function( statusText ) {
+					var finalText = statusText || strAbort;
+					if ( transport ) {
+						transport.abort( finalText );
+					}
+					done( 0, finalText );
+					return this;
+				}
+			};
+
+		// Attach deferreds
+		deferred.promise( jqXHR );
+
+		// Add protocol if not provided (prefilters might expect it)
+		// Handle falsy url in the settings object (#10093: consistency with old signature)
+		// We also use the url parameter if available
+		s.url = ( ( url || s.url || location.href ) + "" )
+			.replace( rprotocol, location.protocol + "//" );
+
+		// Alias method option to type as per ticket #12004
+		s.type = options.method || options.type || s.method || s.type;
+
+		// Extract dataTypes list
+		s.dataTypes = ( s.dataType || "*" ).toLowerCase().match( rnothtmlwhite ) || [ "" ];
+
+		// A cross-domain request is in order when the origin doesn't match the current origin.
+		if ( s.crossDomain == null ) {
+			urlAnchor = document.createElement( "a" );
+
+			// Support: IE <=8 - 11, Edge 12 - 15
+			// IE throws exception on accessing the href property if url is malformed,
+			// e.g. http://example.com:80x/
+			try {
+				urlAnchor.href = s.url;
+
+				// Support: IE <=8 - 11 only
+				// Anchor's host property isn't correctly set when s.url is relative
+				urlAnchor.href = urlAnchor.href;
+				s.crossDomain = originAnchor.protocol + "//" + originAnchor.host !==
+					urlAnchor.protocol + "//" + urlAnchor.host;
+			} catch ( e ) {
+
+				// If there is an error parsing the URL, assume it is crossDomain,
+				// it can be rejected by the transport if it is invalid
+				s.crossDomain = true;
+			}
+		}
+
+		// Convert data if not already a string
+		if ( s.data && s.processData && typeof s.data !== "string" ) {
+			s.data = jQuery.param( s.data, s.traditional );
+		}
+
+		// Apply prefilters
+		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
+
+		// If request was aborted inside a prefilter, stop there
+		if ( completed ) {
+			return jqXHR;
+		}
+
+		// We can fire global events as of now if asked to
+		// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)
+		fireGlobals = jQuery.event && s.global;
+
+		// Watch for a new set of requests
+		if ( fireGlobals && jQuery.active++ === 0 ) {
+			jQuery.event.trigger( "ajaxStart" );
+		}
+
+		// Uppercase the type
+		s.type = s.type.toUpperCase();
+
+		// Determine if request has content
+		s.hasContent = !rnoContent.test( s.type );
+
+		// Save the URL in case we're toying with the If-Modified-Since
+		// and/or If-None-Match header later on
+		// Remove hash to simplify url manipulation
+		cacheURL = s.url.replace( rhash, "" );
+
+		// More options handling for requests with no content
+		if ( !s.hasContent ) {
+
+			// Remember the hash so we can put it back
+			uncached = s.url.slice( cacheURL.length );
+
+			// If data is available and should be processed, append data to url
+			if ( s.data && ( s.processData || typeof s.data === "string" ) ) {
+				cacheURL += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data;
+
+				// #9682: remove data so that it's not used in an eventual retry
+				delete s.data;
+			}
+
+			// Add or update anti-cache param if needed
+			if ( s.cache === false ) {
+				cacheURL = cacheURL.replace( rantiCache, "$1" );
+				uncached = ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + ( nonce++ ) + uncached;
+			}
+
+			// Put hash and anti-cache on the URL that will be requested (gh-1732)
+			s.url = cacheURL + uncached;
+
+		// Change '%20' to '+' if this is encoded form body content (gh-2658)
+		} else if ( s.data && s.processData &&
+			( s.contentType || "" ).indexOf( "application/x-www-form-urlencoded" ) === 0 ) {
+			s.data = s.data.replace( r20, "+" );
+		}
+
+		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+		if ( s.ifModified ) {
+			if ( jQuery.lastModified[ cacheURL ] ) {
+				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
+			}
+			if ( jQuery.etag[ cacheURL ] ) {
+				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
+			}
+		}
+
+		// Set the correct header, if data is being sent
+		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+			jqXHR.setRequestHeader( "Content-Type", s.contentType );
+		}
+
+		// Set the Accepts header for the server, depending on the dataType
+		jqXHR.setRequestHeader(
+			"Accept",
+			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?
+				s.accepts[ s.dataTypes[ 0 ] ] +
+					( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
+				s.accepts[ "*" ]
+		);
+
+		// Check for headers option
+		for ( i in s.headers ) {
+			jqXHR.setRequestHeader( i, s.headers[ i ] );
+		}
+
+		// Allow custom headers/mimetypes and early abort
+		if ( s.beforeSend &&
+			( s.beforeSend.call( callbackContext, jqXHR, s ) === false || completed ) ) {
+
+			// Abort if not done already and return
+			return jqXHR.abort();
+		}
+
+		// Aborting is no longer a cancellation
+		strAbort = "abort";
+
+		// Install callbacks on deferreds
+		completeDeferred.add( s.complete );
+		jqXHR.done( s.success );
+		jqXHR.fail( s.error );
+
+		// Get transport
+		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
+
+		// If no transport, we auto-abort
+		if ( !transport ) {
+			done( -1, "No Transport" );
+		} else {
+			jqXHR.readyState = 1;
+
+			// Send global event
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
+			}
+
+			// If request was aborted inside ajaxSend, stop there
+			if ( completed ) {
+				return jqXHR;
+			}
+
+			// Timeout
+			if ( s.async && s.timeout > 0 ) {
+				timeoutTimer = window.setTimeout( function() {
+					jqXHR.abort( "timeout" );
+				}, s.timeout );
+			}
+
+			try {
+				completed = false;
+				transport.send( requestHeaders, done );
+			} catch ( e ) {
+
+				// Rethrow post-completion exceptions
+				if ( completed ) {
+					throw e;
+				}
+
+				// Propagate others as results
+				done( -1, e );
+			}
+		}
+
+		// Callback for when everything is done
+		function done( status, nativeStatusText, responses, headers ) {
+			var isSuccess, success, error, response, modified,
+				statusText = nativeStatusText;
+
+			// Ignore repeat invocations
+			if ( completed ) {
+				return;
+			}
+
+			completed = true;
+
+			// Clear timeout if it exists
+			if ( timeoutTimer ) {
+				window.clearTimeout( timeoutTimer );
+			}
+
+			// Dereference transport for early garbage collection
+			// (no matter how long the jqXHR object will be used)
+			transport = undefined;
+
+			// Cache response headers
+			responseHeadersString = headers || "";
+
+			// Set readyState
+			jqXHR.readyState = status > 0 ? 4 : 0;
+
+			// Determine if successful
+			isSuccess = status >= 200 && status < 300 || status === 304;
+
+			// Get response data
+			if ( responses ) {
+				response = ajaxHandleResponses( s, jqXHR, responses );
+			}
+
+			// Convert no matter what (that way responseXXX fields are always set)
+			response = ajaxConvert( s, response, jqXHR, isSuccess );
+
+			// If successful, handle type chaining
+			if ( isSuccess ) {
+
+				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+				if ( s.ifModified ) {
+					modified = jqXHR.getResponseHeader( "Last-Modified" );
+					if ( modified ) {
+						jQuery.lastModified[ cacheURL ] = modified;
+					}
+					modified = jqXHR.getResponseHeader( "etag" );
+					if ( modified ) {
+						jQuery.etag[ cacheURL ] = modified;
+					}
+				}
+
+				// if no content
+				if ( status === 204 || s.type === "HEAD" ) {
+					statusText = "nocontent";
+
+				// if not modified
+				} else if ( status === 304 ) {
+					statusText = "notmodified";
+
+				// If we have data, let's convert it
+				} else {
+					statusText = response.state;
+					success = response.data;
+					error = response.error;
+					isSuccess = !error;
+				}
+			} else {
+
+				// Extract error from statusText and normalize for non-aborts
+				error = statusText;
+				if ( status || !statusText ) {
+					statusText = "error";
+					if ( status < 0 ) {
+						status = 0;
+					}
+				}
+			}
+
+			// Set data for the fake xhr object
+			jqXHR.status = status;
+			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
+
+			// Success/Error
+			if ( isSuccess ) {
+				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
+			} else {
+				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
+			}
+
+			// Status-dependent callbacks
+			jqXHR.statusCode( statusCode );
+			statusCode = undefined;
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
+					[ jqXHR, s, isSuccess ? success : error ] );
+			}
+
+			// Complete
+			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
+
+				// Handle the global AJAX counter
+				if ( !( --jQuery.active ) ) {
+					jQuery.event.trigger( "ajaxStop" );
+				}
+			}
+		}
+
+		return jqXHR;
+	},
+
+	getJSON: function( url, data, callback ) {
+		return jQuery.get( url, data, callback, "json" );
+	},
+
+	getScript: function( url, callback ) {
+		return jQuery.get( url, undefined, callback, "script" );
+	}
+} );
+
+jQuery.each( [ "get", "post" ], function( i, method ) {
+	jQuery[ method ] = function( url, data, callback, type ) {
+
+		// Shift arguments if data argument was omitted
+		if ( isFunction( data ) ) {
+			type = type || callback;
+			callback = data;
+			data = undefined;
+		}
+
+		// The url can be an options object (which then must have .url)
+		return jQuery.ajax( jQuery.extend( {
+			url: url,
+			type: method,
+			dataType: type,
+			data: data,
+			success: callback
+		}, jQuery.isPlainObject( url ) && url ) );
+	};
+} );
+
+
+jQuery._evalUrl = function( url, options ) {
+	return jQuery.ajax( {
+		url: url,
+
+		// Make this explicit, since user can override this through ajaxSetup (#11264)
+		type: "GET",
+		dataType: "script",
+		cache: true,
+		async: false,
+		global: false,
+
+		// Only evaluate the response if it is successful (gh-4126)
+		// dataFilter is not invoked for failure responses, so using it instead
+		// of the default converter is kludgy but it works.
+		converters: {
+			"text script": function() {}
+		},
+		dataFilter: function( response ) {
+			jQuery.globalEval( response, options );
+		}
+	} );
+};
+
+
+jQuery.fn.extend( {
+	wrapAll: function( html ) {
+		var wrap;
+
+		if ( this[ 0 ] ) {
+			if ( isFunction( html ) ) {
+				html = html.call( this[ 0 ] );
+			}
+
+			// The elements to wrap the target around
+			wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );
+
+			if ( this[ 0 ].parentNode ) {
+				wrap.insertBefore( this[ 0 ] );
+			}
+
+			wrap.map( function() {
+				var elem = this;
+
+				while ( elem.firstElementChild ) {
+					elem = elem.firstElementChild;
+				}
+
+				return elem;
+			} ).append( this );
+		}
+
+		return this;
+	},
+
+	wrapInner: function( html ) {
+		if ( isFunction( html ) ) {
+			return this.each( function( i ) {
+				jQuery( this ).wrapInner( html.call( this, i ) );
+			} );
+		}
+
+		return this.each( function() {
+			var self = jQuery( this ),
+				contents = self.contents();
+
+			if ( contents.length ) {
+				contents.wrapAll( html );
+
+			} else {
+				self.append( html );
+			}
+		} );
+	},
+
+	wrap: function( html ) {
+		var htmlIsFunction = isFunction( html );
+
+		return this.each( function( i ) {
+			jQuery( this ).wrapAll( htmlIsFunction ? html.call( this, i ) : html );
+		} );
+	},
+
+	unwrap: function( selector ) {
+		this.parent( selector ).not( "body" ).each( function() {
+			jQuery( this ).replaceWith( this.childNodes );
+		} );
+		return this;
+	}
+} );
+
+
+jQuery.expr.pseudos.hidden = function( elem ) {
+	return !jQuery.expr.pseudos.visible( elem );
+};
+jQuery.expr.pseudos.visible = function( elem ) {
+	return !!( elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length );
+};
+
+
+
+
+jQuery.ajaxSettings.xhr = function() {
+	try {
+		return new window.XMLHttpRequest();
+	} catch ( e ) {}
+};
+
+var xhrSuccessStatus = {
+
+		// File protocol always yields status code 0, assume 200
+		0: 200,
+
+		// Support: IE <=9 only
+		// #1450: sometimes IE returns 1223 when it should be 204
+		1223: 204
+	},
+	xhrSupported = jQuery.ajaxSettings.xhr();
+
+support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
+support.ajax = xhrSupported = !!xhrSupported;
+
+jQuery.ajaxTransport( function( options ) {
+	var callback, errorCallback;
+
+	// Cross domain only allowed if supported through XMLHttpRequest
+	if ( support.cors || xhrSupported && !options.crossDomain ) {
+		return {
+			send: function( headers, complete ) {
+				var i,
+					xhr = options.xhr();
+
+				xhr.open(
+					options.type,
+					options.url,
+					options.async,
+					options.username,
+					options.password
+				);
+
+				// Apply custom fields if provided
+				if ( options.xhrFields ) {
+					for ( i in options.xhrFields ) {
+						xhr[ i ] = options.xhrFields[ i ];
+					}
+				}
+
+				// Override mime type if needed
+				if ( options.mimeType && xhr.overrideMimeType ) {
+					xhr.overrideMimeType( options.mimeType );
+				}
+
+				// X-Requested-With header
+				// For cross-domain requests, seeing as conditions for a preflight are
+				// akin to a jigsaw puzzle, we simply never set it to be sure.
+				// (it can always be set on a per-request basis or even using ajaxSetup)
+				// For same-domain requests, won't change header if already provided.
+				if ( !options.crossDomain && !headers[ "X-Requested-With" ] ) {
+					headers[ "X-Requested-With" ] = "XMLHttpRequest";
+				}
+
+				// Set headers
+				for ( i in headers ) {
+					xhr.setRequestHeader( i, headers[ i ] );
+				}
+
+				// Callback
+				callback = function( type ) {
+					return function() {
+						if ( callback ) {
+							callback = errorCallback = xhr.onload =
+								xhr.onerror = xhr.onabort = xhr.ontimeout =
+									xhr.onreadystatechange = null;
+
+							if ( type === "abort" ) {
+								xhr.abort();
+							} else if ( type === "error" ) {
+
+								// Support: IE <=9 only
+								// On a manual native abort, IE9 throws
+								// errors on any property access that is not readyState
+								if ( typeof xhr.status !== "number" ) {
+									complete( 0, "error" );
+								} else {
+									complete(
+
+										// File: protocol always yields status 0; see #8605, #14207
+										xhr.status,
+										xhr.statusText
+									);
+								}
+							} else {
+								complete(
+									xhrSuccessStatus[ xhr.status ] || xhr.status,
+									xhr.statusText,
+
+									// Support: IE <=9 only
+									// IE9 has no XHR2 but throws on binary (trac-11426)
+									// For XHR2 non-text, let the caller handle it (gh-2498)
+									( xhr.responseType || "text" ) !== "text"  ||
+									typeof xhr.responseText !== "string" ?
+										{ binary: xhr.response } :
+										{ text: xhr.responseText },
+									xhr.getAllResponseHeaders()
+								);
+							}
+						}
+					};
+				};
+
+				// Listen to events
+				xhr.onload = callback();
+				errorCallback = xhr.onerror = xhr.ontimeout = callback( "error" );
+
+				// Support: IE 9 only
+				// Use onreadystatechange to replace onabort
+				// to handle uncaught aborts
+				if ( xhr.onabort !== undefined ) {
+					xhr.onabort = errorCallback;
+				} else {
+					xhr.onreadystatechange = function() {
+
+						// Check readyState before timeout as it changes
+						if ( xhr.readyState === 4 ) {
+
+							// Allow onerror to be called first,
+							// but that will not handle a native abort
+							// Also, save errorCallback to a variable
+							// as xhr.onerror cannot be accessed
+							window.setTimeout( function() {
+								if ( callback ) {
+									errorCallback();
+								}
+							} );
+						}
+					};
+				}
+
+				// Create the abort callback
+				callback = callback( "abort" );
+
+				try {
+
+					// Do send the request (this may raise an exception)
+					xhr.send( options.hasContent && options.data || null );
+				} catch ( e ) {
+
+					// #14683: Only rethrow if this hasn't been notified as an error yet
+					if ( callback ) {
+						throw e;
+					}
+				}
+			},
+
+			abort: function() {
+				if ( callback ) {
+					callback();
+				}
+			}
+		};
+	}
+} );
+
+
+
+
+// Prevent auto-execution of scripts when no explicit dataType was provided (See gh-2432)
+jQuery.ajaxPrefilter( function( s ) {
+	if ( s.crossDomain ) {
+		s.contents.script = false;
+	}
+} );
+
+// Install script dataType
+jQuery.ajaxSetup( {
+	accepts: {
+		script: "text/javascript, application/javascript, " +
+			"application/ecmascript, application/x-ecmascript"
+	},
+	contents: {
+		script: /\b(?:java|ecma)script\b/
+	},
+	converters: {
+		"text script": function( text ) {
+			jQuery.globalEval( text );
+			return text;
+		}
+	}
+} );
+
+// Handle cache's special case and crossDomain
+jQuery.ajaxPrefilter( "script", function( s ) {
+	if ( s.cache === undefined ) {
+		s.cache = false;
+	}
+	if ( s.crossDomain ) {
+		s.type = "GET";
+	}
+} );
+
+// Bind script tag hack transport
+jQuery.ajaxTransport( "script", function( s ) {
+
+	// This transport only deals with cross domain or forced-by-attrs requests
+	if ( s.crossDomain || s.scriptAttrs ) {
+		var script, callback;
+		return {
+			send: function( _, complete ) {
+				script = jQuery( "<script>" )
+					.attr( s.scriptAttrs || {} )
+					.prop( { charset: s.scriptCharset, src: s.url } )
+					.on( "load error", callback = function( evt ) {
+						script.remove();
+						callback = null;
+						if ( evt ) {
+							complete( evt.type === "error" ? 404 : 200, evt.type );
+						}
+					} );
+
+				// Use native DOM manipulation to avoid our domManip AJAX trickery
+				document.head.appendChild( script[ 0 ] );
+			},
+			abort: function() {
+				if ( callback ) {
+					callback();
+				}
+			}
+		};
+	}
+} );
+
+
+
+
+var oldCallbacks = [],
+	rjsonp = /(=)\?(?=&|$)|\?\?/;
+
+// Default jsonp settings
+jQuery.ajaxSetup( {
+	jsonp: "callback",
+	jsonpCallback: function() {
+		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
+		this[ callback ] = true;
+		return callback;
+	}
+} );
+
+// Detect, normalize options and install callbacks for jsonp requests
+jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
+
+	var callbackName, overwritten, responseContainer,
+		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
+			"url" :
+			typeof s.data === "string" &&
+				( s.contentType || "" )
+					.indexOf( "application/x-www-form-urlencoded" ) === 0 &&
+				rjsonp.test( s.data ) && "data"
+		);
+
+	// Handle iff the expected data type is "jsonp" or we have a parameter to set
+	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
+
+		// Get callback name, remembering preexisting value associated with it
+		callbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?
+			s.jsonpCallback() :
+			s.jsonpCallback;
+
+		// Insert callback into url or form data
+		if ( jsonProp ) {
+			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
+		} else if ( s.jsonp !== false ) {
+			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
+		}
+
+		// Use data converter to retrieve json after script execution
+		s.converters[ "script json" ] = function() {
+			if ( !responseContainer ) {
+				jQuery.error( callbackName + " was not called" );
+			}
+			return responseContainer[ 0 ];
+		};
+
+		// Force json dataType
+		s.dataTypes[ 0 ] = "json";
+
+		// Install callback
+		overwritten = window[ callbackName ];
+		window[ callbackName ] = function() {
+			responseContainer = arguments;
+		};
+
+		// Clean-up function (fires after converters)
+		jqXHR.always( function() {
+
+			// If previous value didn't exist - remove it
+			if ( overwritten === undefined ) {
+				jQuery( window ).removeProp( callbackName );
+
+			// Otherwise restore preexisting value
+			} else {
+				window[ callbackName ] = overwritten;
+			}
+
+			// Save back as free
+			if ( s[ callbackName ] ) {
+
+				// Make sure that re-using the options doesn't screw things around
+				s.jsonpCallback = originalSettings.jsonpCallback;
+
+				// Save the callback name for future use
+				oldCallbacks.push( callbackName );
+			}
+
+			// Call if it was a function and we have a response
+			if ( responseContainer && isFunction( overwritten ) ) {
+				overwritten( responseContainer[ 0 ] );
+			}
+
+			responseContainer = overwritten = undefined;
+		} );
+
+		// Delegate to script
+		return "script";
+	}
+} );
+
+
+
+
+// Support: Safari 8 only
+// In Safari 8 documents created via document.implementation.createHTMLDocument
+// collapse sibling forms: the second one becomes a child of the first one.
+// Because of that, this security measure has to be disabled in Safari 8.
+// https://bugs.webkit.org/show_bug.cgi?id=137337
+support.createHTMLDocument = ( function() {
+	var body = document.implementation.createHTMLDocument( "" ).body;
+	body.innerHTML = "<form></form><form></form>";
+	return body.childNodes.length === 2;
+} )();
+
+
+// Argument "data" should be string of html
+// context (optional): If specified, the fragment will be created in this context,
+// defaults to document
+// keepScripts (optional): If true, will include scripts passed in the html string
+jQuery.parseHTML = function( data, context, keepScripts ) {
+	if ( typeof data !== "string" ) {
+		return [];
+	}
+	if ( typeof context === "boolean" ) {
+		keepScripts = context;
+		context = false;
+	}
+
+	var base, parsed, scripts;
+
+	if ( !context ) {
+
+		// Stop scripts or inline event handlers from being executed immediately
+		// by using document.implementation
+		if ( support.createHTMLDocument ) {
+			context = document.implementation.createHTMLDocument( "" );
+
+			// Set the base href for the created document
+			// so any parsed elements with URLs
+			// are based on the document's URL (gh-2965)
+			base = context.createElement( "base" );
+			base.href = document.location.href;
+			context.head.appendChild( base );
+		} else {
+			context = document;
+		}
+	}
+
+	parsed = rsingleTag.exec( data );
+	scripts = !keepScripts && [];
+
+	// Single tag
+	if ( parsed ) {
+		return [ context.createElement( parsed[ 1 ] ) ];
+	}
+
+	parsed = buildFragment( [ data ], context, scripts );
+
+	if ( scripts && scripts.length ) {
+		jQuery( scripts ).remove();
+	}
+
+	return jQuery.merge( [], parsed.childNodes );
+};
+
+
+/**
+ * Load a url into a page
+ */
+jQuery.fn.load = function( url, params, callback ) {
+	var selector, type, response,
+		self = this,
+		off = url.indexOf( " " );
+
+	if ( off > -1 ) {
+		selector = stripAndCollapse( url.slice( off ) );
+		url = url.slice( 0, off );
+	}
+
+	// If it's a function
+	if ( isFunction( params ) ) {
+
+		// We assume that it's the callback
+		callback = params;
+		params = undefined;
+
+	// Otherwise, build a param string
+	} else if ( params && typeof params === "object" ) {
+		type = "POST";
+	}
+
+	// If we have elements to modify, make the request
+	if ( self.length > 0 ) {
+		jQuery.ajax( {
+			url: url,
+
+			// If "type" variable is undefined, then "GET" method will be used.
+			// Make value of this field explicit since
+			// user can override it through ajaxSetup method
+			type: type || "GET",
+			dataType: "html",
+			data: params
+		} ).done( function( responseText ) {
+
+			// Save response for use in complete callback
+			response = arguments;
+
+			self.html( selector ?
+
+				// If a selector was specified, locate the right elements in a dummy div
+				// Exclude scripts to avoid IE 'Permission Denied' errors
+				jQuery( "<div>" ).append( jQuery.parseHTML( responseText ) ).find( selector ) :
+
+				// Otherwise use the full result
+				responseText );
+
+		// If the request succeeds, this function gets "data", "status", "jqXHR"
+		// but they are ignored because response was set above.
+		// If it fails, this function gets "jqXHR", "status", "error"
+		} ).always( callback && function( jqXHR, status ) {
+			self.each( function() {
+				callback.apply( this, response || [ jqXHR.responseText, status, jqXHR ] );
+			} );
+		} );
+	}
+
+	return this;
+};
+
+
+
+
+// Attach a bunch of functions for handling common AJAX events
+jQuery.each( [
+	"ajaxStart",
+	"ajaxStop",
+	"ajaxComplete",
+	"ajaxError",
+	"ajaxSuccess",
+	"ajaxSend"
+], function( i, type ) {
+	jQuery.fn[ type ] = function( fn ) {
+		return this.on( type, fn );
+	};
+} );
+
+
+
+
+jQuery.expr.pseudos.animated = function( elem ) {
+	return jQuery.grep( jQuery.timers, function( fn ) {
+		return elem === fn.elem;
+	} ).length;
+};
+
+
+
+
+jQuery.offset = {
+	setOffset: function( elem, options, i ) {
+		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
+			position = jQuery.css( elem, "position" ),
+			curElem = jQuery( elem ),
+			props = {};
+
+		// Set position first, in-case top/left are set even on static elem
+		if ( position === "static" ) {
+			elem.style.position = "relative";
+		}
+
+		curOffset = curElem.offset();
+		curCSSTop = jQuery.css( elem, "top" );
+		curCSSLeft = jQuery.css( elem, "left" );
+		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
+			( curCSSTop + curCSSLeft ).indexOf( "auto" ) > -1;
+
+		// Need to be able to calculate position if either
+		// top or left is auto and position is either absolute or fixed
+		if ( calculatePosition ) {
+			curPosition = curElem.position();
+			curTop = curPosition.top;
+			curLeft = curPosition.left;
+
+		} else {
+			curTop = parseFloat( curCSSTop ) || 0;
+			curLeft = parseFloat( curCSSLeft ) || 0;
+		}
+
+		if ( isFunction( options ) ) {
+
+			// Use jQuery.extend here to allow modification of coordinates argument (gh-1848)
+			options = options.call( elem, i, jQuery.extend( {}, curOffset ) );
+		}
+
+		if ( options.top != null ) {
+			props.top = ( options.top - curOffset.top ) + curTop;
+		}
+		if ( options.left != null ) {
+			props.left = ( options.left - curOffset.left ) + curLeft;
+		}
+
+		if ( "using" in options ) {
+			options.using.call( elem, props );
+
+		} else {
+			curElem.css( props );
+		}
+	}
+};
+
+jQuery.fn.extend( {
+
+	// offset() relates an element's border box to the document origin
+	offset: function( options ) {
+
+		// Preserve chaining for setter
+		if ( arguments.length ) {
+			return options === undefined ?
+				this :
+				this.each( function( i ) {
+					jQuery.offset.setOffset( this, options, i );
+				} );
+		}
+
+		var rect, win,
+			elem = this[ 0 ];
+
+		if ( !elem ) {
+			return;
+		}
+
+		// Return zeros for disconnected and hidden (display: none) elements (gh-2310)
+		// Support: IE <=11 only
+		// Running getBoundingClientRect on a
+		// disconnected node in IE throws an error
+		if ( !elem.getClientRects().length ) {
+			return { top: 0, left: 0 };
+		}
+
+		// Get document-relative position by adding viewport scroll to viewport-relative gBCR
+		rect = elem.getBoundingClientRect();
+		win = elem.ownerDocument.defaultView;
+		return {
+			top: rect.top + win.pageYOffset,
+			left: rect.left + win.pageXOffset
+		};
+	},
+
+	// position() relates an element's margin box to its offset parent's padding box
+	// This corresponds to the behavior of CSS absolute positioning
+	position: function() {
+		if ( !this[ 0 ] ) {
+			return;
+		}
+
+		var offsetParent, offset, doc,
+			elem = this[ 0 ],
+			parentOffset = { top: 0, left: 0 };
+
+		// position:fixed elements are offset from the viewport, which itself always has zero offset
+		if ( jQuery.css( elem, "position" ) === "fixed" ) {
+
+			// Assume position:fixed implies availability of getBoundingClientRect
+			offset = elem.getBoundingClientRect();
+
+		} else {
+			offset = this.offset();
+
+			// Account for the *real* offset parent, which can be the document or its root element
+			// when a statically positioned element is identified
+			doc = elem.ownerDocument;
+			offsetParent = elem.offsetParent || doc.documentElement;
+			while ( offsetParent &&
+				( offsetParent === doc.body || offsetParent === doc.documentElement ) &&
+				jQuery.css( offsetParent, "position" ) === "static" ) {
+
+				offsetParent = offsetParent.parentNode;
+			}
+			if ( offsetParent && offsetParent !== elem && offsetParent.nodeType === 1 ) {
+
+				// Incorporate borders into its offset, since they are outside its content origin
+				parentOffset = jQuery( offsetParent ).offset();
+				parentOffset.top += jQuery.css( offsetParent, "borderTopWidth", true );
+				parentOffset.left += jQuery.css( offsetParent, "borderLeftWidth", true );
+			}
+		}
+
+		// Subtract parent offsets and element margins
+		return {
+			top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
+			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
+		};
+	},
+
+	// This method will return documentElement in the following cases:
+	// 1) For the element inside the iframe without offsetParent, this method will return
+	//    documentElement of the parent window
+	// 2) For the hidden or detached element
+	// 3) For body or html element, i.e. in case of the html node - it will return itself
+	//
+	// but those exceptions were never presented as a real life use-cases
+	// and might be considered as more preferable results.
+	//
+	// This logic, however, is not guaranteed and can change at any point in the future
+	offsetParent: function() {
+		return this.map( function() {
+			var offsetParent = this.offsetParent;
+
+			while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
+				offsetParent = offsetParent.offsetParent;
+			}
+
+			return offsetParent || documentElement;
+		} );
+	}
+} );
+
+// Create scrollLeft and scrollTop methods
+jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
+	var top = "pageYOffset" === prop;
+
+	jQuery.fn[ method ] = function( val ) {
+		return access( this, function( elem, method, val ) {
+
+			// Coalesce documents and windows
+			var win;
+			if ( isWindow( elem ) ) {
+				win = elem;
+			} else if ( elem.nodeType === 9 ) {
+				win = elem.defaultView;
+			}
+
+			if ( val === undefined ) {
+				return win ? win[ prop ] : elem[ method ];
+			}
+
+			if ( win ) {
+				win.scrollTo(
+					!top ? val : win.pageXOffset,
+					top ? val : win.pageYOffset
+				);
+
+			} else {
+				elem[ method ] = val;
+			}
+		}, method, val, arguments.length );
+	};
+} );
+
+// Support: Safari <=7 - 9.1, Chrome <=37 - 49
+// Add the top/left cssHooks using jQuery.fn.position
+// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
+// Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=589347
+// getComputedStyle returns percent when specified for top/left/bottom/right;
+// rather than make the css module depend on the offset module, just check for it here
+jQuery.each( [ "top", "left" ], function( i, prop ) {
+	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
+		function( elem, computed ) {
+			if ( computed ) {
+				computed = curCSS( elem, prop );
+
+				// If curCSS returns percentage, fallback to offset
+				return rnumnonpx.test( computed ) ?
+					jQuery( elem ).position()[ prop ] + "px" :
+					computed;
+			}
+		}
+	);
+} );
+
+
+// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
+jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
+	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name },
+		function( defaultExtra, funcName ) {
+
+		// Margin is only for outerHeight, outerWidth
+		jQuery.fn[ funcName ] = function( margin, value ) {
+			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
+				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );
+
+			return access( this, function( elem, type, value ) {
+				var doc;
+
+				if ( isWindow( elem ) ) {
+
+					// $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)
+					return funcName.indexOf( "outer" ) === 0 ?
+						elem[ "inner" + name ] :
+						elem.document.documentElement[ "client" + name ];
+				}
+
+				// Get document width or height
+				if ( elem.nodeType === 9 ) {
+					doc = elem.documentElement;
+
+					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
+					// whichever is greatest
+					return Math.max(
+						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
+						elem.body[ "offset" + name ], doc[ "offset" + name ],
+						doc[ "client" + name ]
+					);
+				}
+
+				return value === undefined ?
+
+					// Get width or height on the element, requesting but not forcing parseFloat
+					jQuery.css( elem, type, extra ) :
+
+					// Set width or height on the element
+					jQuery.style( elem, type, value, extra );
+			}, type, chainable ? margin : undefined, chainable );
+		};
+	} );
+} );
+
+
+jQuery.each( ( "blur focus focusin focusout resize scroll click dblclick " +
+	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
+	"change select submit keydown keypress keyup contextmenu" ).split( " " ),
+	function( i, name ) {
+
+	// Handle event binding
+	jQuery.fn[ name ] = function( data, fn ) {
+		return arguments.length > 0 ?
+			this.on( name, null, data, fn ) :
+			this.trigger( name );
+	};
+} );
+
+jQuery.fn.extend( {
+	hover: function( fnOver, fnOut ) {
+		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
+	}
+} );
+
+
+
+
+jQuery.fn.extend( {
+
+	bind: function( types, data, fn ) {
+		return this.on( types, null, data, fn );
+	},
+	unbind: function( types, fn ) {
+		return this.off( types, null, fn );
+	},
+
+	delegate: function( selector, types, data, fn ) {
+		return this.on( types, selector, data, fn );
+	},
+	undelegate: function( selector, types, fn ) {
+
+		// ( namespace ) or ( selector, types [, fn] )
+		return arguments.length === 1 ?
+			this.off( selector, "**" ) :
+			this.off( types, selector || "**", fn );
+	}
+} );
+
+// Bind a function to a context, optionally partially applying any
+// arguments.
+// jQuery.proxy is deprecated to promote standards (specifically Function#bind)
+// However, it is not slated for removal any time soon
+jQuery.proxy = function( fn, context ) {
+	var tmp, args, proxy;
+
+	if ( typeof context === "string" ) {
+		tmp = fn[ context ];
+		context = fn;
+		fn = tmp;
+	}
+
+	// Quick check to determine if target is callable, in the spec
+	// this throws a TypeError, but we will just return undefined.
+	if ( !isFunction( fn ) ) {
+		return undefined;
+	}
+
+	// Simulated bind
+	args = slice.call( arguments, 2 );
+	proxy = function() {
+		return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
+	};
+
+	// Set the guid of unique handler to the same of original handler, so it can be removed
+	proxy.guid = fn.guid = fn.guid || jQuery.guid++;
+
+	return proxy;
+};
+
+jQuery.holdReady = function( hold ) {
+	if ( hold ) {
+		jQuery.readyWait++;
+	} else {
+		jQuery.ready( true );
+	}
+};
+jQuery.isArray = Array.isArray;
+jQuery.parseJSON = JSON.parse;
+jQuery.nodeName = nodeName;
+jQuery.isFunction = isFunction;
+jQuery.isWindow = isWindow;
+jQuery.camelCase = camelCase;
+jQuery.type = toType;
+
+jQuery.now = Date.now;
+
+jQuery.isNumeric = function( obj ) {
+
+	// As of jQuery 3.0, isNumeric is limited to
+	// strings and numbers (primitives or objects)
+	// that can be coerced to finite numbers (gh-2662)
+	var type = jQuery.type( obj );
+	return ( type === "number" || type === "string" ) &&
+
+		// parseFloat NaNs numeric-cast false positives ("")
+		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
+		// subtraction forces infinities to NaN
+		!isNaN( obj - parseFloat( obj ) );
+};
+
+
+
+
+// Register as a named AMD module, since jQuery can be concatenated with other
+// files that may use define, but not via a proper concatenation script that
+// understands anonymous AMD modules. A named AMD is safest and most robust
+// way to register. Lowercase jquery is used because AMD module names are
+// derived from file names, and jQuery is normally delivered in a lowercase
+// file name. Do this after creating the global so that if an AMD module wants
+// to call noConflict to hide this version of jQuery, it will work.
+
+// Note that for maximum portability, libraries that are not jQuery should
+// declare themselves as anonymous modules, and avoid setting a global if an
+// AMD loader is present. jQuery is a special case. For more information, see
+// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
+
+if ( typeof define === "function" && define.amd ) {
+	define( "jquery", [], function() {
+		return jQuery;
+	} );
+}
+
+
+
+
+var
+
+	// Map over jQuery in case of overwrite
+	_jQuery = window.jQuery,
+
+	// Map over the $ in case of overwrite
+	_$ = window.$;
+
+jQuery.noConflict = function( deep ) {
+	if ( window.$ === jQuery ) {
+		window.$ = _$;
+	}
+
+	if ( deep && window.jQuery === jQuery ) {
+		window.jQuery = _jQuery;
+	}
+
+	return jQuery;
+};
+
+// Expose jQuery and $ identifiers, even in AMD
+// (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
+// and CommonJS for browser emulators (#13566)
+if ( !noGlobal ) {
+	window.jQuery = window.$ = jQuery;
+}
+
+
+
+
+return jQuery;
+} );

content/docs/kie/0.1.0/_static/jquery.js

diff --git a/content/docs/kie/0.1.0/_static/jquery.js b/content/docs/kie/0.1.0/_static/jquery.js
new file mode 100644
index 0000000..a1c07fd
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/jquery.js
@@ -0,0 +1,2 @@
+/*! jQuery v3.4.1 | (c) JS Foundation and other contributors | jquery.org/license */
+!function(e,t){"use strict";"object"==typeof module&&"object"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error("jQuery requires a window with a document");return t(e)}:t(e)}("undefined"!=typeof window?window:this,function(C,e){"use strict";var t=[],E=C.document,r=Object.getPrototypeOf,s=t.slice,g=t.concat,u=t.push,i=t.indexOf,n={},o=n.toString,v=n.hasOwnProperty,a=v.toString,l=a.call(Object),y={},m=function(e){return"function"==typeof e&&"number"!=typeof e.nodeType},x=function(e){return null!=e&&e===e.window},c={type:!0,src:!0,nonce:!0,noModule:!0};function b(e,t,n){var r,i,o=(n=n||E).createElement("script");if(o.text=e,t)for(r in c)(i=t[r]||t.getAttribute&&t.getAttribute(r))&&o.setAttribute(r,i);n.head.appendChild(o).parentNode.removeChild(o)}function w(e){return null==e?e+"":"object"==typeof e||"function"==typeof e?n[o.call(e)]||"object":typeof e}var f="3.4.1",k=function(e,t){return new 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content/docs/kie/0.1.0/_static/js/modernizr.min.js

diff --git a/content/docs/kie/0.1.0/_static/js/modernizr.min.js b/content/docs/kie/0.1.0/_static/js/modernizr.min.js
new file mode 100644
index 0000000..f65d479
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/js/modernizr.min.js
@@ -0,0 +1,4 @@
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content/docs/kie/0.1.0/_static/js/theme.js

diff --git a/content/docs/kie/0.1.0/_static/js/theme.js b/content/docs/kie/0.1.0/_static/js/theme.js
new file mode 100644
index 0000000..8555d79
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/js/theme.js
@@ -0,0 +1,3 @@
+/* sphinx_rtd_theme version 0.4.3 | MIT license */
+/* Built 20190212 16:02 */
+require=function r(s,a,l){function c(e,n){if(!a[e]){if(!s[e]){var i="function"==typeof require&&require;if(!n&&i)return i(e,!0);if(u)return u(e,!0);var t=new Error("Cannot find module '"+e+"'");throw t.code="MODULE_NOT_FOUND",t}var o=a[e]={exports:{}};s[e][0].call(o.exports,function(n){return c(s[e][1][n]||n)},o,o.exports,r,s,a,l)}return a[e].exports}for(var u="function"==typeof require&&require,n=0;n<l.length;n++)c(l[n]);return c}({"sphinx-rtd-theme":[function(n,e,i){var jQuery="undefined"!=typeof window?window.jQuery:n("jquery");e.exports.ThemeNav={navBar:null,win:null,winScroll:!1,winResize:!1,linkScroll:!1,winPosition:0,winHeight:null,docHeight:null,isRunning:!1,enable:function(e){var i=this;void 0===e&&(e=!0),i.isRunning||(i.isRunning=!0,jQuery(function(n){i.init(n),i.reset(),i.win.on("hashchange",i.reset),e&&i.win.on("scroll",function(){i.linkScroll||i.winScroll||(i.winScroll=!0,requestAnimationFrame(function(){i.onScroll()}))}),i.win.on("resize",function(){i.winResize||(i.winResize=!0,requestAnimationFrame(function(){i.onResize()}))}),i.onResize()}))},enableSticky:function(){this.enable(!0)},init:function(i){i(document);var t=this;this.navBar=i("div.wy-side-scroll:first"),this.win=i(window),i(document).on("click","[data-toggle='wy-nav-top']",function(){i("[data-toggle='wy-nav-shift']").toggleClass("shift"),i("[data-toggle='rst-versions']").toggleClass("shift")}).on("click",".wy-menu-vertical .current ul li a",function(){var n=i(this);i("[data-toggle='wy-nav-shift']").removeClass("shift"),i("[data-toggle='rst-versions']").toggleClass("shift"),t.toggleCurrent(n),t.hashChange()}).on("click","[data-toggle='rst-current-version']",function(){i("[data-toggle='rst-versions']").toggleClass("shift-up")}),i("table.docutils:not(.field-list,.footnote,.citation)").wrap("<div class='wy-table-responsive'></div>"),i("table.docutils.footnote").wrap("<div class='wy-table-responsive footnote'></div>"),i("table.docutils.citation").wrap("<div class='wy-table-responsive citation'></div>"),i(".wy-menu-vertical ul").not(".simple").siblings("a").each(function(){var e=i(this);expand=i('<span class="toctree-expand"></span>'),expand.on("click",function(n){return t.toggleCurrent(e),n.stopPropagation(),!1}),e.prepend(expand)})},reset:function(){var n=encodeURI(window.location.hash)||"#";try{var e=$(".wy-menu-vertical"),i=e.find('[href="'+n+'"]');if(0===i.length){var t=$('.document [id="'+n.substring(1)+'"]').closest("div.section");0===(i=e.find('[href="#'+t.attr("id")+'"]')).length&&(i=e.find('[href="#"]'))}0<i.length&&($(".wy-menu-vertical .current").removeClass("current"),i.addClass("current"),i.closest("li.toctree-l1").addClass("current"),i.closest("li.toctree-l1").parent().addClass("current"),i.closest("li.toctree-l1").addClass("current"),i.closest("li.toctree-l2").addClass("current"),i.closest("li.toctree-l3").addClass("current"),i.closest("li.toctree-l4").addClass("current"),i[0].scrollIntoView())}catch(o){console.log("Error expanding nav for anchor",o)}},onScroll:function(){this.winScroll=!1;var n=this.win.scrollTop(),e=n+this.winHeight,i=this.navBar.scrollTop()+(n-this.winPosition);n<0||e>this.docHeight||(this.navBar.scrollTop(i),this.winPosition=n)},onResize:function(){this.winResize=!1,this.winHeight=this.win.height(),this.docHeight=$(document).height()},hashChange:function(){this.linkScroll=!0,this.win.one("hashchange",function(){this.linkScroll=!1})},toggleCurrent:function(n){var e=n.closest("li");e.siblings("li.current").removeClass("current"),e.siblings().find("li.current").removeClass("current"),e.find("> ul li.current").removeClass("current"),e.toggleClass("current")}},"undefined"!=typeof window&&(window.SphinxRtdTheme={Navigation:e.exports.ThemeNav,StickyNav:e.exports.ThemeNav}),function(){for(var r=0,n=["ms","moz","webkit","o"],e=0;e<n.length&&!window.requestAnimationFrame;++e)window.requestAnimationFrame=window[n[e]+"RequestAnimationFrame"],window.cancelAnimationFrame=window[n[e]+"CancelAnimationFrame"]||window[n[e]+"CancelRequestAnimationFrame"];window.requestAnimationFrame||(window.requestAnimationFrame=function(n,e){var i=(new Date).getTime(),t=Math.max(0,16-(i-r)),o=window.setTimeout(function(){n(i+t)},t);return r=i+t,o}),window.cancelAnimationFrame||(window.cancelAnimationFrame=function(n){clearTimeout(n)})}()},{jquery:"jquery"}]},{},["sphinx-rtd-theme"]);
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content/docs/kie/0.1.0/_static/language_data.js

diff --git a/content/docs/kie/0.1.0/_static/language_data.js b/content/docs/kie/0.1.0/_static/language_data.js
new file mode 100644
index 0000000..5266fb1
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/language_data.js
@@ -0,0 +1,297 @@
+/*
+ * language_data.js
+ * ~~~~~~~~~~~~~~~~
+ *
+ * This script contains the language-specific data used by searchtools.js,
+ * namely the list of stopwords, stemmer, scorer and splitter.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+var stopwords = ["a","and","are","as","at","be","but","by","for","if","in","into","is","it","near","no","not","of","on","or","such","that","the","their","then","there","these","they","this","to","was","will","with"];
+
+
+/* Non-minified version JS is _stemmer.js if file is provided */ 
+/**
+ * Porter Stemmer
+ */
+var Stemmer = function() {
+
+  var step2list = {
+    ational: 'ate',
+    tional: 'tion',
+    enci: 'ence',
+    anci: 'ance',
+    izer: 'ize',
+    bli: 'ble',
+    alli: 'al',
+    entli: 'ent',
+    eli: 'e',
+    ousli: 'ous',
+    ization: 'ize',
+    ation: 'ate',
+    ator: 'ate',
+    alism: 'al',
+    iveness: 'ive',
+    fulness: 'ful',
+    ousness: 'ous',
+    aliti: 'al',
+    iviti: 'ive',
+    biliti: 'ble',
+    logi: 'log'
+  };
+
+  var step3list = {
+    icate: 'ic',
+    ative: '',
+    alize: 'al',
+    iciti: 'ic',
+    ical: 'ic',
+    ful: '',
+    ness: ''
+  };
+
+  var c = "[^aeiou]";          // consonant
+  var v = "[aeiouy]";          // vowel
+  var C = c + "[^aeiouy]*";    // consonant sequence
+  var V = v + "[aeiou]*";      // vowel sequence
+
+  var mgr0 = "^(" + C + ")?" + V + C;                      // [C]VC... is m>0
+  var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$";    // [C]VC[V] is m=1
+  var mgr1 = "^(" + C + ")?" + V + C + V + C;              // [C]VCVC... is m>1
+  var s_v   = "^(" + C + ")?" + v;                         // vowel in stem
+
+  this.stemWord = function (w) {
+    var stem;
+    var suffix;
+    var firstch;
+    var origword = w;
+
+    if (w.length < 3)
+      return w;
+
+    var re;
+    var re2;
+    var re3;
+    var re4;
+
+    firstch = w.substr(0,1);
+    if (firstch == "y")
+      w = firstch.toUpperCase() + w.substr(1);
+
+    // Step 1a
+    re = /^(.+?)(ss|i)es$/;
+    re2 = /^(.+?)([^s])s$/;
+
+    if (re.test(w))
+      w = w.replace(re,"$1$2");
+    else if (re2.test(w))
+      w = w.replace(re2,"$1$2");
+
+    // Step 1b
+    re = /^(.+?)eed$/;
+    re2 = /^(.+?)(ed|ing)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      re = new RegExp(mgr0);
+      if (re.test(fp[1])) {
+        re = /.$/;
+        w = w.replace(re,"");
+      }
+    }
+    else if (re2.test(w)) {
+      var fp = re2.exec(w);
+      stem = fp[1];
+      re2 = new RegExp(s_v);
+      if (re2.test(stem)) {
+        w = stem;
+        re2 = /(at|bl|iz)$/;
+        re3 = new RegExp("([^aeiouylsz])\\1$");
+        re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");
+        if (re2.test(w))
+          w = w + "e";
+        else if (re3.test(w)) {
+          re = /.$/;
+          w = w.replace(re,"");
+        }
+        else if (re4.test(w))
+          w = w + "e";
+      }
+    }
+
+    // Step 1c
+    re = /^(.+?)y$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      re = new RegExp(s_v);
+      if (re.test(stem))
+        w = stem + "i";
+    }
+
+    // Step 2
+    re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      suffix = fp[2];
+      re = new RegExp(mgr0);
+      if (re.test(stem))
+        w = stem + step2list[suffix];
+    }
+
+    // Step 3
+    re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      suffix = fp[2];
+      re = new RegExp(mgr0);
+      if (re.test(stem))
+        w = stem + step3list[suffix];
+    }
+
+    // Step 4
+    re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;
+    re2 = /^(.+?)(s|t)(ion)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      re = new RegExp(mgr1);
+      if (re.test(stem))
+        w = stem;
+    }
+    else if (re2.test(w)) {
+      var fp = re2.exec(w);
+      stem = fp[1] + fp[2];
+      re2 = new RegExp(mgr1);
+      if (re2.test(stem))
+        w = stem;
+    }
+
+    // Step 5
+    re = /^(.+?)e$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      re = new RegExp(mgr1);
+      re2 = new RegExp(meq1);
+      re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");
+      if (re.test(stem) || (re2.test(stem) && !(re3.test(stem))))
+        w = stem;
+    }
+    re = /ll$/;
+    re2 = new RegExp(mgr1);
+    if (re.test(w) && re2.test(w)) {
+      re = /.$/;
+      w = w.replace(re,"");
+    }
+
+    // and turn initial Y back to y
+    if (firstch == "y")
+      w = firstch.toLowerCase() + w.substr(1);
+    return w;
+  }
+}
+
+
+
+
+
+var splitChars = (function() {
+    var result = {};
+    var singles = [96, 180, 187, 191, 215, 247, 749, 885, 903, 907, 909, 930, 1014, 1648,
+         1748, 1809, 2416, 2473, 2481, 2526, 2601, 2609, 2612, 2615, 2653, 2702,
+         2706, 2729, 2737, 2740, 2857, 2865, 2868, 2910, 2928, 2948, 2961, 2971,
+         2973, 3085, 3089, 3113, 3124, 3213, 3217, 3241, 3252, 3295, 3341, 3345,
+         3369, 3506, 3516, 3633, 3715, 3721, 3736, 3744, 3748, 3750, 3756, 3761,
+         3781, 3912, 4239, 4347, 4681, 4695, 4697, 4745, 4785, 4799, 4801, 4823,
+         4881, 5760, 5901, 5997, 6313, 7405, 8024, 8026, 8028, 8030, 8117, 8125,
+         8133, 8181, 8468, 8485, 8487, 8489, 8494, 8527, 11311, 11359, 11687, 11695,
+         11703, 11711, 11719, 11727, 11735, 12448, 12539, 43010, 43014, 43019, 43587,
+         43696, 43713, 64286, 64297, 64311, 64317, 64319, 64322, 64325, 65141];
+    var i, j, start, end;
+    for (i = 0; i < singles.length; i++) {
+        result[singles[i]] = true;
+    }
+    var ranges = [[0, 47], [58, 64], [91, 94], [123, 169], [171, 177], [182, 184], [706, 709],
+         [722, 735], [741, 747], [751, 879], [888, 889], [894, 901], [1154, 1161],
+         [1318, 1328], [1367, 1368], [1370, 1376], [1416, 1487], [1515, 1519], [1523, 1568],
+         [1611, 1631], [1642, 1645], [1750, 1764], [1767, 1773], [1789, 1790], [1792, 1807],
+         [1840, 1868], [1958, 1968], [1970, 1983], [2027, 2035], [2038, 2041], [2043, 2047],
+         [2070, 2073], [2075, 2083], [2085, 2087], [2089, 2307], [2362, 2364], [2366, 2383],
+         [2385, 2391], [2402, 2405], [2419, 2424], [2432, 2436], [2445, 2446], [2449, 2450],
+         [2483, 2485], [2490, 2492], [2494, 2509], [2511, 2523], [2530, 2533], [2546, 2547],
+         [2554, 2564], [2571, 2574], [2577, 2578], [2618, 2648], [2655, 2661], [2672, 2673],
+         [2677, 2692], [2746, 2748], [2750, 2767], [2769, 2783], [2786, 2789], [2800, 2820],
+         [2829, 2830], [2833, 2834], [2874, 2876], [2878, 2907], [2914, 2917], [2930, 2946],
+         [2955, 2957], [2966, 2968], [2976, 2978], [2981, 2983], [2987, 2989], [3002, 3023],
+         [3025, 3045], [3059, 3076], [3130, 3132], [3134, 3159], [3162, 3167], [3170, 3173],
+         [3184, 3191], [3199, 3204], [3258, 3260], [3262, 3293], [3298, 3301], [3312, 3332],
+         [3386, 3388], [3390, 3423], [3426, 3429], [3446, 3449], [3456, 3460], [3479, 3481],
+         [3518, 3519], [3527, 3584], [3636, 3647], [3655, 3663], [3674, 3712], [3717, 3718],
+         [3723, 3724], [3726, 3731], [3752, 3753], [3764, 3772], [3774, 3775], [3783, 3791],
+         [3802, 3803], [3806, 3839], [3841, 3871], [3892, 3903], [3949, 3975], [3980, 4095],
+         [4139, 4158], [4170, 4175], [4182, 4185], [4190, 4192], [4194, 4196], [4199, 4205],
+         [4209, 4212], [4226, 4237], [4250, 4255], [4294, 4303], [4349, 4351], [4686, 4687],
+         [4702, 4703], [4750, 4751], [4790, 4791], [4806, 4807], [4886, 4887], [4955, 4968],
+         [4989, 4991], [5008, 5023], [5109, 5120], [5741, 5742], [5787, 5791], [5867, 5869],
+         [5873, 5887], [5906, 5919], [5938, 5951], [5970, 5983], [6001, 6015], [6068, 6102],
+         [6104, 6107], [6109, 6111], [6122, 6127], [6138, 6159], [6170, 6175], [6264, 6271],
+         [6315, 6319], [6390, 6399], [6429, 6469], [6510, 6511], [6517, 6527], [6572, 6592],
+         [6600, 6607], [6619, 6655], [6679, 6687], [6741, 6783], [6794, 6799], [6810, 6822],
+         [6824, 6916], [6964, 6980], [6988, 6991], [7002, 7042], [7073, 7085], [7098, 7167],
+         [7204, 7231], [7242, 7244], [7294, 7400], [7410, 7423], [7616, 7679], [7958, 7959],
+         [7966, 7967], [8006, 8007], [8014, 8015], [8062, 8063], [8127, 8129], [8141, 8143],
+         [8148, 8149], [8156, 8159], [8173, 8177], [8189, 8303], [8306, 8307], [8314, 8318],
+         [8330, 8335], [8341, 8449], [8451, 8454], [8456, 8457], [8470, 8472], [8478, 8483],
+         [8506, 8507], [8512, 8516], [8522, 8525], [8586, 9311], [9372, 9449], [9472, 10101],
+         [10132, 11263], [11493, 11498], [11503, 11516], [11518, 11519], [11558, 11567],
+         [11622, 11630], [11632, 11647], [11671, 11679], [11743, 11822], [11824, 12292],
+         [12296, 12320], [12330, 12336], [12342, 12343], [12349, 12352], [12439, 12444],
+         [12544, 12548], [12590, 12592], [12687, 12689], [12694, 12703], [12728, 12783],
+         [12800, 12831], [12842, 12880], [12896, 12927], [12938, 12976], [12992, 13311],
+         [19894, 19967], [40908, 40959], [42125, 42191], [42238, 42239], [42509, 42511],
+         [42540, 42559], [42592, 42593], [42607, 42622], [42648, 42655], [42736, 42774],
+         [42784, 42785], [42889, 42890], [42893, 43002], [43043, 43055], [43062, 43071],
+         [43124, 43137], [43188, 43215], [43226, 43249], [43256, 43258], [43260, 43263],
+         [43302, 43311], [43335, 43359], [43389, 43395], [43443, 43470], [43482, 43519],
+         [43561, 43583], [43596, 43599], [43610, 43615], [43639, 43641], [43643, 43647],
+         [43698, 43700], [43703, 43704], [43710, 43711], [43715, 43738], [43742, 43967],
+         [44003, 44015], [44026, 44031], [55204, 55215], [55239, 55242], [55292, 55295],
+         [57344, 63743], [64046, 64047], [64110, 64111], [64218, 64255], [64263, 64274],
+         [64280, 64284], [64434, 64466], [64830, 64847], [64912, 64913], [64968, 65007],
+         [65020, 65135], [65277, 65295], [65306, 65312], [65339, 65344], [65371, 65381],
+         [65471, 65473], [65480, 65481], [65488, 65489], [65496, 65497]];
+    for (i = 0; i < ranges.length; i++) {
+        start = ranges[i][0];
+        end = ranges[i][1];
+        for (j = start; j <= end; j++) {
+            result[j] = true;
+        }
+    }
+    return result;
+})();
+
+function splitQuery(query) {
+    var result = [];
+    var start = -1;
+    for (var i = 0; i < query.length; i++) {
+        if (splitChars[query.charCodeAt(i)]) {
+            if (start !== -1) {
+                result.push(query.slice(start, i));
+                start = -1;
+            }
+        } else if (start === -1) {
+            start = i;
+        }
+    }
+    if (start !== -1) {
+        result.push(query.slice(start));
+    }
+    return result;
+}
+
+

content/docs/kie/0.1.0/_static/minus.png

diff --git a/content/docs/kie/0.1.0/_static/minus.png b/content/docs/kie/0.1.0/_static/minus.png
new file mode 100644
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content/docs/kie/0.1.0/_static/plus.png

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content/docs/kie/0.1.0/_static/pygments.css

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+.highlight .cm { color: #408090; font-style: italic } /* Comment.Multiline */
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content/docs/kie/0.1.0/_static/searchtools.js

diff --git a/content/docs/kie/0.1.0/_static/searchtools.js b/content/docs/kie/0.1.0/_static/searchtools.js
new file mode 100644
index 0000000..6031f99
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/searchtools.js
@@ -0,0 +1,506 @@
+/*
+ * searchtools.js
+ * ~~~~~~~~~~~~~~~~
+ *
+ * Sphinx JavaScript utilities for the full-text search.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+if (!Scorer) {
+  /**
+   * Simple result scoring code.
+   */
+  var Scorer = {
+    // Implement the following function to further tweak the score for each result
+    // The function takes a result array [filename, title, anchor, descr, score]
+    // and returns the new score.
+    /*
+    score: function(result) {
+      return result[4];
+    },
+    */
+
+    // query matches the full name of an object
+    objNameMatch: 11,
+    // or matches in the last dotted part of the object name
+    objPartialMatch: 6,
+    // Additive scores depending on the priority of the object
+    objPrio: {0:  15,   // used to be importantResults
+              1:  5,   // used to be objectResults
+              2: -5},  // used to be unimportantResults
+    //  Used when the priority is not in the mapping.
+    objPrioDefault: 0,
+
+    // query found in title
+    title: 15,
+    partialTitle: 7,
+    // query found in terms
+    term: 5,
+    partialTerm: 2
+  };
+}
+
+if (!splitQuery) {
+  function splitQuery(query) {
+    return query.split(/\s+/);
+  }
+}
+
+/**
+ * Search Module
+ */
+var Search = {
+
+  _index : null,
+  _queued_query : null,
+  _pulse_status : -1,
+
+  htmlToText : function(htmlString) {
+      var htmlElement = document.createElement('span');
+      htmlElement.innerHTML = htmlString;
+      $(htmlElement).find('.headerlink').remove();
+      docContent = $(htmlElement).find('[role=main]')[0];
+      return docContent.textContent || docContent.innerText;
+  },
+
+  init : function() {
+      var params = $.getQueryParameters();
+      if (params.q) {
+          var query = params.q[0];
+          $('input[name="q"]')[0].value = query;
+          this.performSearch(query);
+      }
+  },
+
+  loadIndex : function(url) {
+    $.ajax({type: "GET", url: url, data: null,
+            dataType: "script", cache: true,
+            complete: function(jqxhr, textstatus) {
+              if (textstatus != "success") {
+                document.getElementById("searchindexloader").src = url;
+              }
+            }});
+  },
+
+  setIndex : function(index) {
+    var q;
+    this._index = index;
+    if ((q = this._queued_query) !== null) {
+      this._queued_query = null;
+      Search.query(q);
+    }
+  },
+
+  hasIndex : function() {
+      return this._index !== null;
+  },
+
+  deferQuery : function(query) {
+      this._queued_query = query;
+  },
+
+  stopPulse : function() {
+      this._pulse_status = 0;
+  },
+
+  startPulse : function() {
+    if (this._pulse_status >= 0)
+        return;
+    function pulse() {
+      var i;
+      Search._pulse_status = (Search._pulse_status + 1) % 4;
+      var dotString = '';
+      for (i = 0; i < Search._pulse_status; i++)
+        dotString += '.';
+      Search.dots.text(dotString);
+      if (Search._pulse_status > -1)
+        window.setTimeout(pulse, 500);
+    }
+    pulse();
+  },
+
+  /**
+   * perform a search for something (or wait until index is loaded)
+   */
+  performSearch : function(query) {
+    // create the required interface elements
+    this.out = $('#search-results');
+    this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
+    this.dots = $('<span></span>').appendTo(this.title);
+    this.status = $('<p class="search-summary">&nbsp;</p>').appendTo(this.out);
+    this.output = $('<ul class="search"/>').appendTo(this.out);
+
+    $('#search-progress').text(_('Preparing search...'));
+    this.startPulse();
+
+    // index already loaded, the browser was quick!
+    if (this.hasIndex())
+      this.query(query);
+    else
+      this.deferQuery(query);
+  },
+
+  /**
+   * execute search (requires search index to be loaded)
+   */
+  query : function(query) {
+    var i;
+
+    // stem the searchterms and add them to the correct list
+    var stemmer = new Stemmer();
+    var searchterms = [];
+    var excluded = [];
+    var hlterms = [];
+    var tmp = splitQuery(query);
+    var objectterms = [];
+    for (i = 0; i < tmp.length; i++) {
+      if (tmp[i] !== "") {
+          objectterms.push(tmp[i].toLowerCase());
+      }
+
+      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
+          tmp[i] === "") {
+        // skip this "word"
+        continue;
+      }
+      // stem the word
+      var word = stemmer.stemWord(tmp[i].toLowerCase());
+      // prevent stemmer from cutting word smaller than two chars
+      if(word.length < 3 && tmp[i].length >= 3) {
+        word = tmp[i];
+      }
+      var toAppend;
+      // select the correct list
+      if (word[0] == '-') {
+        toAppend = excluded;
+        word = word.substr(1);
+      }
+      else {
+        toAppend = searchterms;
+        hlterms.push(tmp[i].toLowerCase());
+      }
+      // only add if not already in the list
+      if (!$u.contains(toAppend, word))
+        toAppend.push(word);
+    }
+    var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
+
+    // console.debug('SEARCH: searching for:');
+    // console.info('required: ', searchterms);
+    // console.info('excluded: ', excluded);
+
+    // prepare search
+    var terms = this._index.terms;
+    var titleterms = this._index.titleterms;
+
+    // array of [filename, title, anchor, descr, score]
+    var results = [];
+    $('#search-progress').empty();
+
+    // lookup as object
+    for (i = 0; i < objectterms.length; i++) {
+      var others = [].concat(objectterms.slice(0, i),
+                             objectterms.slice(i+1, objectterms.length));
+      results = results.concat(this.performObjectSearch(objectterms[i], others));
+    }
+
+    // lookup as search terms in fulltext
+    results = results.concat(this.performTermsSearch(searchterms, excluded, terms, titleterms));
+
+    // let the scorer override scores with a custom scoring function
+    if (Scorer.score) {
+      for (i = 0; i < results.length; i++)
+        results[i][4] = Scorer.score(results[i]);
+    }
+
+    // now sort the results by score (in opposite order of appearance, since the
+    // display function below uses pop() to retrieve items) and then
+    // alphabetically
+    results.sort(function(a, b) {
+      var left = a[4];
+      var right = b[4];
+      if (left > right) {
+        return 1;
+      } else if (left < right) {
+        return -1;
+      } else {
+        // same score: sort alphabetically
+        left = a[1].toLowerCase();
+        right = b[1].toLowerCase();
+        return (left > right) ? -1 : ((left < right) ? 1 : 0);
+      }
+    });
+
+    // for debugging
+    //Search.lastresults = results.slice();  // a copy
+    //console.info('search results:', Search.lastresults);
+
+    // print the results
+    var resultCount = results.length;
+    function displayNextItem() {
+      // results left, load the summary and display it
+      if (results.length) {
+        var item = results.pop();
+        var listItem = $('<li style="display:none"></li>');
+        if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
+          // dirhtml builder
+          var dirname = item[0] + '/';
+          if (dirname.match(/\/index\/$/)) {
+            dirname = dirname.substring(0, dirname.length-6);
+          } else if (dirname == 'index/') {
+            dirname = '';
+          }
+          listItem.append($('<a/>').attr('href',
+            DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
+            highlightstring + item[2]).html(item[1]));
+        } else {
+          // normal html builders
+          listItem.append($('<a/>').attr('href',
+            item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
+            highlightstring + item[2]).html(item[1]));
+        }
+        if (item[3]) {
+          listItem.append($('<span> (' + item[3] + ')</span>'));
+          Search.output.append(listItem);
+          listItem.slideDown(5, function() {
+            displayNextItem();
+          });
+        } else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
+          $.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX,
+                  dataType: "text",
+                  complete: function(jqxhr, textstatus) {
+                    var data = jqxhr.responseText;
+                    if (data !== '' && data !== undefined) {
+                      listItem.append(Search.makeSearchSummary(data, searchterms, hlterms));
+                    }
+                    Search.output.append(listItem);
+                    listItem.slideDown(5, function() {
+                      displayNextItem();
+                    });
+                  }});
+        } else {
+          // no source available, just display title
+          Search.output.append(listItem);
+          listItem.slideDown(5, function() {
+            displayNextItem();
+          });
+        }
+      }
+      // search finished, update title and status message
+      else {
+        Search.stopPulse();
+        Search.title.text(_('Search Results'));
+        if (!resultCount)
+          Search.status.text(_('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.'));
+        else
+            Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
+        Search.status.fadeIn(500);
+      }
+    }
+    displayNextItem();
+  },
+
+  /**
+   * search for object names
+   */
+  performObjectSearch : function(object, otherterms) {
+    var filenames = this._index.filenames;
+    var docnames = this._index.docnames;
+    var objects = this._index.objects;
+    var objnames = this._index.objnames;
+    var titles = this._index.titles;
+
+    var i;
+    var results = [];
+
+    for (var prefix in objects) {
+      for (var name in objects[prefix]) {
+        var fullname = (prefix ? prefix + '.' : '') + name;
+        var fullnameLower = fullname.toLowerCase()
+        if (fullnameLower.indexOf(object) > -1) {
+          var score = 0;
+          var parts = fullnameLower.split('.');
+          // check for different match types: exact matches of full name or
+          // "last name" (i.e. last dotted part)
+          if (fullnameLower == object || parts[parts.length - 1] == object) {
+            score += Scorer.objNameMatch;
+          // matches in last name
+          } else if (parts[parts.length - 1].indexOf(object) > -1) {
+            score += Scorer.objPartialMatch;
+          }
+          var match = objects[prefix][name];
+          var objname = objnames[match[1]][2];
+          var title = titles[match[0]];
+          // If more than one term searched for, we require other words to be
+          // found in the name/title/description
+          if (otherterms.length > 0) {
+            var haystack = (prefix + ' ' + name + ' ' +
+                            objname + ' ' + title).toLowerCase();
+            var allfound = true;
+            for (i = 0; i < otherterms.length; i++) {
+              if (haystack.indexOf(otherterms[i]) == -1) {
+                allfound = false;
+                break;
+              }
+            }
+            if (!allfound) {
+              continue;
+            }
+          }
+          var descr = objname + _(', in ') + title;
+
+          var anchor = match[3];
+          if (anchor === '')
+            anchor = fullname;
+          else if (anchor == '-')
+            anchor = objnames[match[1]][1] + '-' + fullname;
+          // add custom score for some objects according to scorer
+          if (Scorer.objPrio.hasOwnProperty(match[2])) {
+            score += Scorer.objPrio[match[2]];
+          } else {
+            score += Scorer.objPrioDefault;
+          }
+          results.push([docnames[match[0]], fullname, '#'+anchor, descr, score, filenames[match[0]]]);
+        }
+      }
+    }
+
+    return results;
+  },
+
+  /**
+   * search for full-text terms in the index
+   */
+  performTermsSearch : function(searchterms, excluded, terms, titleterms) {
+    var docnames = this._index.docnames;
+    var filenames = this._index.filenames;
+    var titles = this._index.titles;
+
+    var i, j, file;
+    var fileMap = {};
+    var scoreMap = {};
+    var results = [];
+
+    // perform the search on the required terms
+    for (i = 0; i < searchterms.length; i++) {
+      var word = searchterms[i];
+      var files = [];
+      var _o = [
+        {files: terms[word], score: Scorer.term},
+        {files: titleterms[word], score: Scorer.title}
+      ];
+      // add support for partial matches
+      if (word.length > 2) {
+        for (var w in terms) {
+          if (w.match(word) && !terms[word]) {
+            _o.push({files: terms[w], score: Scorer.partialTerm})
+          }
+        }
+        for (var w in titleterms) {
+          if (w.match(word) && !titleterms[word]) {
+              _o.push({files: titleterms[w], score: Scorer.partialTitle})
+          }
+        }
+      }
+
+      // no match but word was a required one
+      if ($u.every(_o, function(o){return o.files === undefined;})) {
+        break;
+      }
+      // found search word in contents
+      $u.each(_o, function(o) {
+        var _files = o.files;
+        if (_files === undefined)
+          return
+
+        if (_files.length === undefined)
+          _files = [_files];
+        files = files.concat(_files);
+
+        // set score for the word in each file to Scorer.term
+        for (j = 0; j < _files.length; j++) {
+          file = _files[j];
+          if (!(file in scoreMap))
+            scoreMap[file] = {}
+          scoreMap[file][word] = o.score;
+        }
+      });
+
+      // create the mapping
+      for (j = 0; j < files.length; j++) {
+        file = files[j];
+        if (file in fileMap)
+          fileMap[file].push(word);
+        else
+          fileMap[file] = [word];
+      }
+    }
+
+    // now check if the files don't contain excluded terms
+    for (file in fileMap) {
+      var valid = true;
+
+      // check if all requirements are matched
+      var filteredTermCount = // as search terms with length < 3 are discarded: ignore
+        searchterms.filter(function(term){return term.length > 2}).length
+      if (
+        fileMap[file].length != searchterms.length &&
+        fileMap[file].length != filteredTermCount
+      ) continue;
+
+      // ensure that none of the excluded terms is in the search result
+      for (i = 0; i < excluded.length; i++) {
+        if (terms[excluded[i]] == file ||
+            titleterms[excluded[i]] == file ||
+            $u.contains(terms[excluded[i]] || [], file) ||
+            $u.contains(titleterms[excluded[i]] || [], file)) {
+          valid = false;
+          break;
+        }
+      }
+
+      // if we have still a valid result we can add it to the result list
+      if (valid) {
+        // select one (max) score for the file.
+        // for better ranking, we should calculate ranking by using words statistics like basic tf-idf...
+        var score = $u.max($u.map(fileMap[file], function(w){return scoreMap[file][w]}));
+        results.push([docnames[file], titles[file], '', null, score, filenames[file]]);
+      }
+    }
+    return results;
+  },
+
+  /**
+   * helper function to return a node containing the
+   * search summary for a given text. keywords is a list
+   * of stemmed words, hlwords is the list of normal, unstemmed
+   * words. the first one is used to find the occurrence, the
+   * latter for highlighting it.
+   */
+  makeSearchSummary : function(htmlText, keywords, hlwords) {
+    var text = Search.htmlToText(htmlText);
+    var textLower = text.toLowerCase();
+    var start = 0;
+    $.each(keywords, function() {
+      var i = textLower.indexOf(this.toLowerCase());
+      if (i > -1)
+        start = i;
+    });
+    start = Math.max(start - 120, 0);
+    var excerpt = ((start > 0) ? '...' : '') +
+      $.trim(text.substr(start, 240)) +
+      ((start + 240 - text.length) ? '...' : '');
+    var rv = $('<div class="context"></div>').text(excerpt);
+    $.each(hlwords, function() {
+      rv = rv.highlightText(this, 'highlighted');
+    });
+    return rv;
+  }
+};
+
+$(document).ready(function() {
+  Search.init();
+});

content/docs/kie/0.1.0/_static/underscore-1.3.1.js

diff --git a/content/docs/kie/0.1.0/_static/underscore-1.3.1.js b/content/docs/kie/0.1.0/_static/underscore-1.3.1.js
new file mode 100644
index 0000000..208d4cd
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/underscore-1.3.1.js
@@ -0,0 +1,999 @@
+//     Underscore.js 1.3.1
+//     (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
+//     Underscore is freely distributable under the MIT license.
+//     Portions of Underscore are inspired or borrowed from Prototype,
+//     Oliver Steele's Functional, and John Resig's Micro-Templating.
+//     For all details and documentation:
+//     http://documentcloud.github.com/underscore
+
+(function() {
+
+  // Baseline setup
+  // --------------
+
+  // Establish the root object, `window` in the browser, or `global` on the server.
+  var root = this;
+
+  // Save the previous value of the `_` variable.
+  var previousUnderscore = root._;
+
+  // Establish the object that gets returned to break out of a loop iteration.
+  var breaker = {};
+
+  // Save bytes in the minified (but not gzipped) version:
+  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
+
+  // Create quick reference variables for speed access to core prototypes.
+  var slice            = ArrayProto.slice,
+      unshift          = ArrayProto.unshift,
+      toString         = ObjProto.toString,
+      hasOwnProperty   = ObjProto.hasOwnProperty;
+
+  // All **ECMAScript 5** native function implementations that we hope to use
+  // are declared here.
+  var
+    nativeForEach      = ArrayProto.forEach,
+    nativeMap          = ArrayProto.map,
+    nativeReduce       = ArrayProto.reduce,
+    nativeReduceRight  = ArrayProto.reduceRight,
+    nativeFilter       = ArrayProto.filter,
+    nativeEvery        = ArrayProto.every,
+    nativeSome         = ArrayProto.some,
+    nativeIndexOf      = ArrayProto.indexOf,
+    nativeLastIndexOf  = ArrayProto.lastIndexOf,
+    nativeIsArray      = Array.isArray,
+    nativeKeys         = Object.keys,
+    nativeBind         = FuncProto.bind;
+
+  // Create a safe reference to the Underscore object for use below.
+  var _ = function(obj) { return new wrapper(obj); };
+
+  // Export the Underscore object for **Node.js**, with
+  // backwards-compatibility for the old `require()` API. If we're in
+  // the browser, add `_` as a global object via a string identifier,
+  // for Closure Compiler "advanced" mode.
+  if (typeof exports !== 'undefined') {
+    if (typeof module !== 'undefined' && module.exports) {
+      exports = module.exports = _;
+    }
+    exports._ = _;
+  } else {
+    root['_'] = _;
+  }
+
+  // Current version.
+  _.VERSION = '1.3.1';
+
+  // Collection Functions
+  // --------------------
+
+  // The cornerstone, an `each` implementation, aka `forEach`.
+  // Handles objects with the built-in `forEach`, arrays, and raw objects.
+  // Delegates to **ECMAScript 5**'s native `forEach` if available.
+  var each = _.each = _.forEach = function(obj, iterator, context) {
+    if (obj == null) return;
+    if (nativeForEach && obj.forEach === nativeForEach) {
+      obj.forEach(iterator, context);
+    } else if (obj.length === +obj.length) {
+      for (var i = 0, l = obj.length; i < l; i++) {
+        if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return;
+      }
+    } else {
+      for (var key in obj) {
+        if (_.has(obj, key)) {
+          if (iterator.call(context, obj[key], key, obj) === breaker) return;
+        }
+      }
+    }
+  };
+
+  // Return the results of applying the iterator to each element.
+  // Delegates to **ECMAScript 5**'s native `map` if available.
+  _.map = _.collect = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
+    each(obj, function(value, index, list) {
+      results[results.length] = iterator.call(context, value, index, list);
+    });
+    if (obj.length === +obj.length) results.length = obj.length;
+    return results;
+  };
+
+  // **Reduce** builds up a single result from a list of values, aka `inject`,
+  // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
+  _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
+    var initial = arguments.length > 2;
+    if (obj == null) obj = [];
+    if (nativeReduce && obj.reduce === nativeReduce) {
+      if (context) iterator = _.bind(iterator, context);
+      return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
+    }
+    each(obj, function(value, index, list) {
+      if (!initial) {
+        memo = value;
+        initial = true;
+      } else {
+        memo = iterator.call(context, memo, value, index, list);
+      }
+    });
+    if (!initial) throw new TypeError('Reduce of empty array with no initial value');
+    return memo;
+  };
+
+  // The right-associative version of reduce, also known as `foldr`.
+  // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
+  _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
+    var initial = arguments.length > 2;
+    if (obj == null) obj = [];
+    if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
+      if (context) iterator = _.bind(iterator, context);
+      return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
+    }
+    var reversed = _.toArray(obj).reverse();
+    if (context && !initial) iterator = _.bind(iterator, context);
+    return initial ? _.reduce(reversed, iterator, memo, context) : _.reduce(reversed, iterator);
+  };
+
+  // Return the first value which passes a truth test. Aliased as `detect`.
+  _.find = _.detect = function(obj, iterator, context) {
+    var result;
+    any(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) {
+        result = value;
+        return true;
+      }
+    });
+    return result;
+  };
+
+  // Return all the elements that pass a truth test.
+  // Delegates to **ECMAScript 5**'s native `filter` if available.
+  // Aliased as `select`.
+  _.filter = _.select = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
+    each(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) results[results.length] = value;
+    });
+    return results;
+  };
+
+  // Return all the elements for which a truth test fails.
+  _.reject = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    each(obj, function(value, index, list) {
+      if (!iterator.call(context, value, index, list)) results[results.length] = value;
+    });
+    return results;
+  };
+
+  // Determine whether all of the elements match a truth test.
+  // Delegates to **ECMAScript 5**'s native `every` if available.
+  // Aliased as `all`.
+  _.every = _.all = function(obj, iterator, context) {
+    var result = true;
+    if (obj == null) return result;
+    if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
+    each(obj, function(value, index, list) {
+      if (!(result = result && iterator.call(context, value, index, list))) return breaker;
+    });
+    return result;
+  };
+
+  // Determine if at least one element in the object matches a truth test.
+  // Delegates to **ECMAScript 5**'s native `some` if available.
+  // Aliased as `any`.
+  var any = _.some = _.any = function(obj, iterator, context) {
+    iterator || (iterator = _.identity);
+    var result = false;
+    if (obj == null) return result;
+    if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
+    each(obj, function(value, index, list) {
+      if (result || (result = iterator.call(context, value, index, list))) return breaker;
+    });
+    return !!result;
+  };
+
+  // Determine if a given value is included in the array or object using `===`.
+  // Aliased as `contains`.
+  _.include = _.contains = function(obj, target) {
+    var found = false;
+    if (obj == null) return found;
+    if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
+    found = any(obj, function(value) {
+      return value === target;
+    });
+    return found;
+  };
+
+  // Invoke a method (with arguments) on every item in a collection.
+  _.invoke = function(obj, method) {
+    var args = slice.call(arguments, 2);
+    return _.map(obj, function(value) {
+      return (_.isFunction(method) ? method || value : value[method]).apply(value, args);
+    });
+  };
+
+  // Convenience version of a common use case of `map`: fetching a property.
+  _.pluck = function(obj, key) {
+    return _.map(obj, function(value){ return value[key]; });
+  };
+
+  // Return the maximum element or (element-based computation).
+  _.max = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
+    if (!iterator && _.isEmpty(obj)) return -Infinity;
+    var result = {computed : -Infinity};
+    each(obj, function(value, index, list) {
+      var computed = iterator ? iterator.call(context, value, index, list) : value;
+      computed >= result.computed && (result = {value : value, computed : computed});
+    });
+    return result.value;
+  };
+
+  // Return the minimum element (or element-based computation).
+  _.min = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
+    if (!iterator && _.isEmpty(obj)) return Infinity;
+    var result = {computed : Infinity};
+    each(obj, function(value, index, list) {
+      var computed = iterator ? iterator.call(context, value, index, list) : value;
+      computed < result.computed && (result = {value : value, computed : computed});
+    });
+    return result.value;
+  };
+
+  // Shuffle an array.
+  _.shuffle = function(obj) {
+    var shuffled = [], rand;
+    each(obj, function(value, index, list) {
+      if (index == 0) {
+        shuffled[0] = value;
+      } else {
+        rand = Math.floor(Math.random() * (index + 1));
+        shuffled[index] = shuffled[rand];
+        shuffled[rand] = value;
+      }
+    });
+    return shuffled;
+  };
+
+  // Sort the object's values by a criterion produced by an iterator.
+  _.sortBy = function(obj, iterator, context) {
+    return _.pluck(_.map(obj, function(value, index, list) {
+      return {
+        value : value,
+        criteria : iterator.call(context, value, index, list)
+      };
+    }).sort(function(left, right) {
+      var a = left.criteria, b = right.criteria;
+      return a < b ? -1 : a > b ? 1 : 0;
+    }), 'value');
+  };
+
+  // Groups the object's values by a criterion. Pass either a string attribute
+  // to group by, or a function that returns the criterion.
+  _.groupBy = function(obj, val) {
+    var result = {};
+    var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; };
+    each(obj, function(value, index) {
+      var key = iterator(value, index);
+      (result[key] || (result[key] = [])).push(value);
+    });
+    return result;
+  };
+
+  // Use a comparator function to figure out at what index an object should
+  // be inserted so as to maintain order. Uses binary search.
+  _.sortedIndex = function(array, obj, iterator) {
+    iterator || (iterator = _.identity);
+    var low = 0, high = array.length;
+    while (low < high) {
+      var mid = (low + high) >> 1;
+      iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid;
+    }
+    return low;
+  };
+
+  // Safely convert anything iterable into a real, live array.
+  _.toArray = function(iterable) {
+    if (!iterable)                return [];
+    if (iterable.toArray)         return iterable.toArray();
+    if (_.isArray(iterable))      return slice.call(iterable);
+    if (_.isArguments(iterable))  return slice.call(iterable);
+    return _.values(iterable);
+  };
+
+  // Return the number of elements in an object.
+  _.size = function(obj) {
+    return _.toArray(obj).length;
+  };
+
+  // Array Functions
+  // ---------------
+
+  // Get the first element of an array. Passing **n** will return the first N
+  // values in the array. Aliased as `head`. The **guard** check allows it to work
+  // with `_.map`.
+  _.first = _.head = function(array, n, guard) {
+    return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
+  };
+
+  // Returns everything but the last entry of the array. Especcialy useful on
+  // the arguments object. Passing **n** will return all the values in
+  // the array, excluding the last N. The **guard** check allows it to work with
+  // `_.map`.
+  _.initial = function(array, n, guard) {
+    return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
+  };
+
+  // Get the last element of an array. Passing **n** will return the last N
+  // values in the array. The **guard** check allows it to work with `_.map`.
+  _.last = function(array, n, guard) {
+    if ((n != null) && !guard) {
+      return slice.call(array, Math.max(array.length - n, 0));
+    } else {
+      return array[array.length - 1];
+    }
+  };
+
+  // Returns everything but the first entry of the array. Aliased as `tail`.
+  // Especially useful on the arguments object. Passing an **index** will return
+  // the rest of the values in the array from that index onward. The **guard**
+  // check allows it to work with `_.map`.
+  _.rest = _.tail = function(array, index, guard) {
+    return slice.call(array, (index == null) || guard ? 1 : index);
+  };
+
+  // Trim out all falsy values from an array.
+  _.compact = function(array) {
+    return _.filter(array, function(value){ return !!value; });
+  };
+
+  // Return a completely flattened version of an array.
+  _.flatten = function(array, shallow) {
+    return _.reduce(array, function(memo, value) {
+      if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value));
+      memo[memo.length] = value;
+      return memo;
+    }, []);
+  };
+
+  // Return a version of the array that does not contain the specified value(s).
+  _.without = function(array) {
+    return _.difference(array, slice.call(arguments, 1));
+  };
+
+  // Produce a duplicate-free version of the array. If the array has already
+  // been sorted, you have the option of using a faster algorithm.
+  // Aliased as `unique`.
+  _.uniq = _.unique = function(array, isSorted, iterator) {
+    var initial = iterator ? _.map(array, iterator) : array;
+    var result = [];
+    _.reduce(initial, function(memo, el, i) {
+      if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) {
+        memo[memo.length] = el;
+        result[result.length] = array[i];
+      }
+      return memo;
+    }, []);
+    return result;
+  };
+
+  // Produce an array that contains the union: each distinct element from all of
+  // the passed-in arrays.
+  _.union = function() {
+    return _.uniq(_.flatten(arguments, true));
+  };
+
+  // Produce an array that contains every item shared between all the
+  // passed-in arrays. (Aliased as "intersect" for back-compat.)
+  _.intersection = _.intersect = function(array) {
+    var rest = slice.call(arguments, 1);
+    return _.filter(_.uniq(array), function(item) {
+      return _.every(rest, function(other) {
+        return _.indexOf(other, item) >= 0;
+      });
+    });
+  };
+
+  // Take the difference between one array and a number of other arrays.
+  // Only the elements present in just the first array will remain.
+  _.difference = function(array) {
+    var rest = _.flatten(slice.call(arguments, 1));
+    return _.filter(array, function(value){ return !_.include(rest, value); });
+  };
+
+  // Zip together multiple lists into a single array -- elements that share
+  // an index go together.
+  _.zip = function() {
+    var args = slice.call(arguments);
+    var length = _.max(_.pluck(args, 'length'));
+    var results = new Array(length);
+    for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
+    return results;
+  };
+
+  // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
+  // we need this function. Return the position of the first occurrence of an
+  // item in an array, or -1 if the item is not included in the array.
+  // Delegates to **ECMAScript 5**'s native `indexOf` if available.
+  // If the array is large and already in sort order, pass `true`
+  // for **isSorted** to use binary search.
+  _.indexOf = function(array, item, isSorted) {
+    if (array == null) return -1;
+    var i, l;
+    if (isSorted) {
+      i = _.sortedIndex(array, item);
+      return array[i] === item ? i : -1;
+    }
+    if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
+    for (i = 0, l = array.length; i < l; i++) if (i in array && array[i] === item) return i;
+    return -1;
+  };
+
+  // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
+  _.lastIndexOf = function(array, item) {
+    if (array == null) return -1;
+    if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
+    var i = array.length;
+    while (i--) if (i in array && array[i] === item) return i;
+    return -1;
+  };
+
+  // Generate an integer Array containing an arithmetic progression. A port of
+  // the native Python `range()` function. See
+  // [the Python documentation](http://docs.python.org/library/functions.html#range).
+  _.range = function(start, stop, step) {
+    if (arguments.length <= 1) {
+      stop = start || 0;
+      start = 0;
+    }
+    step = arguments[2] || 1;
+
+    var len = Math.max(Math.ceil((stop - start) / step), 0);
+    var idx = 0;
+    var range = new Array(len);
+
+    while(idx < len) {
+      range[idx++] = start;
+      start += step;
+    }
+
+    return range;
+  };
+
+  // Function (ahem) Functions
+  // ------------------
+
+  // Reusable constructor function for prototype setting.
+  var ctor = function(){};
+
+  // Create a function bound to a given object (assigning `this`, and arguments,
+  // optionally). Binding with arguments is also known as `curry`.
+  // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
+  // We check for `func.bind` first, to fail fast when `func` is undefined.
+  _.bind = function bind(func, context) {
+    var bound, args;
+    if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
+    if (!_.isFunction(func)) throw new TypeError;
+    args = slice.call(arguments, 2);
+    return bound = function() {
+      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
+      ctor.prototype = func.prototype;
+      var self = new ctor;
+      var result = func.apply(self, args.concat(slice.call(arguments)));
+      if (Object(result) === result) return result;
+      return self;
+    };
+  };
+
+  // Bind all of an object's methods to that object. Useful for ensuring that
+  // all callbacks defined on an object belong to it.
+  _.bindAll = function(obj) {
+    var funcs = slice.call(arguments, 1);
+    if (funcs.length == 0) funcs = _.functions(obj);
+    each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
+    return obj;
+  };
+
+  // Memoize an expensive function by storing its results.
+  _.memoize = function(func, hasher) {
+    var memo = {};
+    hasher || (hasher = _.identity);
+    return function() {
+      var key = hasher.apply(this, arguments);
+      return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
+    };
+  };
+
+  // Delays a function for the given number of milliseconds, and then calls
+  // it with the arguments supplied.
+  _.delay = function(func, wait) {
+    var args = slice.call(arguments, 2);
+    return setTimeout(function(){ return func.apply(func, args); }, wait);
+  };
+
+  // Defers a function, scheduling it to run after the current call stack has
+  // cleared.
+  _.defer = function(func) {
+    return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
+  };
+
+  // Returns a function, that, when invoked, will only be triggered at most once
+  // during a given window of time.
+  _.throttle = function(func, wait) {
+    var context, args, timeout, throttling, more;
+    var whenDone = _.debounce(function(){ more = throttling = false; }, wait);
+    return function() {
+      context = this; args = arguments;
+      var later = function() {
+        timeout = null;
+        if (more) func.apply(context, args);
+        whenDone();
+      };
+      if (!timeout) timeout = setTimeout(later, wait);
+      if (throttling) {
+        more = true;
+      } else {
+        func.apply(context, args);
+      }
+      whenDone();
+      throttling = true;
+    };
+  };
+
+  // Returns a function, that, as long as it continues to be invoked, will not
+  // be triggered. The function will be called after it stops being called for
+  // N milliseconds.
+  _.debounce = function(func, wait) {
+    var timeout;
+    return function() {
+      var context = this, args = arguments;
+      var later = function() {
+        timeout = null;
+        func.apply(context, args);
+      };
+      clearTimeout(timeout);
+      timeout = setTimeout(later, wait);
+    };
+  };
+
+  // Returns a function that will be executed at most one time, no matter how
+  // often you call it. Useful for lazy initialization.
+  _.once = function(func) {
+    var ran = false, memo;
+    return function() {
+      if (ran) return memo;
+      ran = true;
+      return memo = func.apply(this, arguments);
+    };
+  };
+
+  // Returns the first function passed as an argument to the second,
+  // allowing you to adjust arguments, run code before and after, and
+  // conditionally execute the original function.
+  _.wrap = function(func, wrapper) {
+    return function() {
+      var args = [func].concat(slice.call(arguments, 0));
+      return wrapper.apply(this, args);
+    };
+  };
+
+  // Returns a function that is the composition of a list of functions, each
+  // consuming the return value of the function that follows.
+  _.compose = function() {
+    var funcs = arguments;
+    return function() {
+      var args = arguments;
+      for (var i = funcs.length - 1; i >= 0; i--) {
+        args = [funcs[i].apply(this, args)];
+      }
+      return args[0];
+    };
+  };
+
+  // Returns a function that will only be executed after being called N times.
+  _.after = function(times, func) {
+    if (times <= 0) return func();
+    return function() {
+      if (--times < 1) { return func.apply(this, arguments); }
+    };
+  };
+
+  // Object Functions
+  // ----------------
+
+  // Retrieve the names of an object's properties.
+  // Delegates to **ECMAScript 5**'s native `Object.keys`
+  _.keys = nativeKeys || function(obj) {
+    if (obj !== Object(obj)) throw new TypeError('Invalid object');
+    var keys = [];
+    for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key;
+    return keys;
+  };
+
+  // Retrieve the values of an object's properties.
+  _.values = function(obj) {
+    return _.map(obj, _.identity);
+  };
+
+  // Return a sorted list of the function names available on the object.
+  // Aliased as `methods`
+  _.functions = _.methods = function(obj) {
+    var names = [];
+    for (var key in obj) {
+      if (_.isFunction(obj[key])) names.push(key);
+    }
+    return names.sort();
+  };
+
+  // Extend a given object with all the properties in passed-in object(s).
+  _.extend = function(obj) {
+    each(slice.call(arguments, 1), function(source) {
+      for (var prop in source) {
+        obj[prop] = source[prop];
+      }
+    });
+    return obj;
+  };
+
+  // Fill in a given object with default properties.
+  _.defaults = function(obj) {
+    each(slice.call(arguments, 1), function(source) {
+      for (var prop in source) {
+        if (obj[prop] == null) obj[prop] = source[prop];
+      }
+    });
+    return obj;
+  };
+
+  // Create a (shallow-cloned) duplicate of an object.
+  _.clone = function(obj) {
+    if (!_.isObject(obj)) return obj;
+    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
+  };
+
+  // Invokes interceptor with the obj, and then returns obj.
+  // The primary purpose of this method is to "tap into" a method chain, in
+  // order to perform operations on intermediate results within the chain.
+  _.tap = function(obj, interceptor) {
+    interceptor(obj);
+    return obj;
+  };
+
+  // Internal recursive comparison function.
+  function eq(a, b, stack) {
+    // Identical objects are equal. `0 === -0`, but they aren't identical.
+    // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal.
+    if (a === b) return a !== 0 || 1 / a == 1 / b;
+    // A strict comparison is necessary because `null == undefined`.
+    if (a == null || b == null) return a === b;
+    // Unwrap any wrapped objects.
+    if (a._chain) a = a._wrapped;
+    if (b._chain) b = b._wrapped;
+    // Invoke a custom `isEqual` method if one is provided.
+    if (a.isEqual && _.isFunction(a.isEqual)) return a.isEqual(b);
+    if (b.isEqual && _.isFunction(b.isEqual)) return b.isEqual(a);
+    // Compare `[[Class]]` names.
+    var className = toString.call(a);
+    if (className != toString.call(b)) return false;
+    switch (className) {
+      // Strings, numbers, dates, and booleans are compared by value.
+      case '[object String]':
+        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
+        // equivalent to `new String("5")`.
+        return a == String(b);
+      case '[object Number]':
+        // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
+        // other numeric values.
+        return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
+      case '[object Date]':
+      case '[object Boolean]':
+        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
+        // millisecond representations. Note that invalid dates with millisecond representations
+        // of `NaN` are not equivalent.
+        return +a == +b;
+      // RegExps are compared by their source patterns and flags.
+      case '[object RegExp]':
+        return a.source == b.source &&
+               a.global == b.global &&
+               a.multiline == b.multiline &&
+               a.ignoreCase == b.ignoreCase;
+    }
+    if (typeof a != 'object' || typeof b != 'object') return false;
+    // Assume equality for cyclic structures. The algorithm for detecting cyclic
+    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
+    var length = stack.length;
+    while (length--) {
+      // Linear search. Performance is inversely proportional to the number of
+      // unique nested structures.
+      if (stack[length] == a) return true;
+    }
+    // Add the first object to the stack of traversed objects.
+    stack.push(a);
+    var size = 0, result = true;
+    // Recursively compare objects and arrays.
+    if (className == '[object Array]') {
+      // Compare array lengths to determine if a deep comparison is necessary.
+      size = a.length;
+      result = size == b.length;
+      if (result) {
+        // Deep compare the contents, ignoring non-numeric properties.
+        while (size--) {
+          // Ensure commutative equality for sparse arrays.
+          if (!(result = size in a == size in b && eq(a[size], b[size], stack))) break;
+        }
+      }
+    } else {
+      // Objects with different constructors are not equivalent.
+      if ('constructor' in a != 'constructor' in b || a.constructor != b.constructor) return false;
+      // Deep compare objects.
+      for (var key in a) {
+        if (_.has(a, key)) {
+          // Count the expected number of properties.
+          size++;
+          // Deep compare each member.
+          if (!(result = _.has(b, key) && eq(a[key], b[key], stack))) break;
+        }
+      }
+      // Ensure that both objects contain the same number of properties.
+      if (result) {
+        for (key in b) {
+          if (_.has(b, key) && !(size--)) break;
+        }
+        result = !size;
+      }
+    }
+    // Remove the first object from the stack of traversed objects.
+    stack.pop();
+    return result;
+  }
+
+  // Perform a deep comparison to check if two objects are equal.
+  _.isEqual = function(a, b) {
+    return eq(a, b, []);
+  };
+
+  // Is a given array, string, or object empty?
+  // An "empty" object has no enumerable own-properties.
+  _.isEmpty = function(obj) {
+    if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
+    for (var key in obj) if (_.has(obj, key)) return false;
+    return true;
+  };
+
+  // Is a given value a DOM element?
+  _.isElement = function(obj) {
+    return !!(obj && obj.nodeType == 1);
+  };
+
+  // Is a given value an array?
+  // Delegates to ECMA5's native Array.isArray
+  _.isArray = nativeIsArray || function(obj) {
+    return toString.call(obj) == '[object Array]';
+  };
+
+  // Is a given variable an object?
+  _.isObject = function(obj) {
+    return obj === Object(obj);
+  };
+
+  // Is a given variable an arguments object?
+  _.isArguments = function(obj) {
+    return toString.call(obj) == '[object Arguments]';
+  };
+  if (!_.isArguments(arguments)) {
+    _.isArguments = function(obj) {
+      return !!(obj && _.has(obj, 'callee'));
+    };
+  }
+
+  // Is a given value a function?
+  _.isFunction = function(obj) {
+    return toString.call(obj) == '[object Function]';
+  };
+
+  // Is a given value a string?
+  _.isString = function(obj) {
+    return toString.call(obj) == '[object String]';
+  };
+
+  // Is a given value a number?
+  _.isNumber = function(obj) {
+    return toString.call(obj) == '[object Number]';
+  };
+
+  // Is the given value `NaN`?
+  _.isNaN = function(obj) {
+    // `NaN` is the only value for which `===` is not reflexive.
+    return obj !== obj;
+  };
+
+  // Is a given value a boolean?
+  _.isBoolean = function(obj) {
+    return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
+  };
+
+  // Is a given value a date?
+  _.isDate = function(obj) {
+    return toString.call(obj) == '[object Date]';
+  };
+
+  // Is the given value a regular expression?
+  _.isRegExp = function(obj) {
+    return toString.call(obj) == '[object RegExp]';
+  };
+
+  // Is a given value equal to null?
+  _.isNull = function(obj) {
+    return obj === null;
+  };
+
+  // Is a given variable undefined?
+  _.isUndefined = function(obj) {
+    return obj === void 0;
+  };
+
+  // Has own property?
+  _.has = function(obj, key) {
+    return hasOwnProperty.call(obj, key);
+  };
+
+  // Utility Functions
+  // -----------------
+
+  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
+  // previous owner. Returns a reference to the Underscore object.
+  _.noConflict = function() {
+    root._ = previousUnderscore;
+    return this;
+  };
+
+  // Keep the identity function around for default iterators.
+  _.identity = function(value) {
+    return value;
+  };
+
+  // Run a function **n** times.
+  _.times = function (n, iterator, context) {
+    for (var i = 0; i < n; i++) iterator.call(context, i);
+  };
+
+  // Escape a string for HTML interpolation.
+  _.escape = function(string) {
+    return (''+string).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;').replace(/'/g, '&#x27;').replace(/\//g,'&#x2F;');
+  };
+
+  // Add your own custom functions to the Underscore object, ensuring that
+  // they're correctly added to the OOP wrapper as well.
+  _.mixin = function(obj) {
+    each(_.functions(obj), function(name){
+      addToWrapper(name, _[name] = obj[name]);
+    });
+  };
+
+  // Generate a unique integer id (unique within the entire client session).
+  // Useful for temporary DOM ids.
+  var idCounter = 0;
+  _.uniqueId = function(prefix) {
+    var id = idCounter++;
+    return prefix ? prefix + id : id;
+  };
+
+  // By default, Underscore uses ERB-style template delimiters, change the
+  // following template settings to use alternative delimiters.
+  _.templateSettings = {
+    evaluate    : /<%([\s\S]+?)%>/g,
+    interpolate : /<%=([\s\S]+?)%>/g,
+    escape      : /<%-([\s\S]+?)%>/g
+  };
+
+  // When customizing `templateSettings`, if you don't want to define an
+  // interpolation, evaluation or escaping regex, we need one that is
+  // guaranteed not to match.
+  var noMatch = /.^/;
+
+  // Within an interpolation, evaluation, or escaping, remove HTML escaping
+  // that had been previously added.
+  var unescape = function(code) {
+    return code.replace(/\\\\/g, '\\').replace(/\\'/g, "'");
+  };
+
+  // JavaScript micro-templating, similar to John Resig's implementation.
+  // Underscore templating handles arbitrary delimiters, preserves whitespace,
+  // and correctly escapes quotes within interpolated code.
+  _.template = function(str, data) {
+    var c  = _.templateSettings;
+    var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
+      'with(obj||{}){__p.push(\'' +
+      str.replace(/\\/g, '\\\\')
+         .replace(/'/g, "\\'")
+         .replace(c.escape || noMatch, function(match, code) {
+           return "',_.escape(" + unescape(code) + "),'";
+         })
+         .replace(c.interpolate || noMatch, function(match, code) {
+           return "'," + unescape(code) + ",'";
+         })
+         .replace(c.evaluate || noMatch, function(match, code) {
+           return "');" + unescape(code).replace(/[\r\n\t]/g, ' ') + ";__p.push('";
+         })
+         .replace(/\r/g, '\\r')
+         .replace(/\n/g, '\\n')
+         .replace(/\t/g, '\\t')
+         + "');}return __p.join('');";
+    var func = new Function('obj', '_', tmpl);
+    if (data) return func(data, _);
+    return function(data) {
+      return func.call(this, data, _);
+    };
+  };
+
+  // Add a "chain" function, which will delegate to the wrapper.
+  _.chain = function(obj) {
+    return _(obj).chain();
+  };
+
+  // The OOP Wrapper
+  // ---------------
+
+  // If Underscore is called as a function, it returns a wrapped object that
+  // can be used OO-style. This wrapper holds altered versions of all the
+  // underscore functions. Wrapped objects may be chained.
+  var wrapper = function(obj) { this._wrapped = obj; };
+
+  // Expose `wrapper.prototype` as `_.prototype`
+  _.prototype = wrapper.prototype;
+
+  // Helper function to continue chaining intermediate results.
+  var result = function(obj, chain) {
+    return chain ? _(obj).chain() : obj;
+  };
+
+  // A method to easily add functions to the OOP wrapper.
+  var addToWrapper = function(name, func) {
+    wrapper.prototype[name] = function() {
+      var args = slice.call(arguments);
+      unshift.call(args, this._wrapped);
+      return result(func.apply(_, args), this._chain);
+    };
+  };
+
+  // Add all of the Underscore functions to the wrapper object.
+  _.mixin(_);
+
+  // Add all mutator Array functions to the wrapper.
+  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+    var method = ArrayProto[name];
+    wrapper.prototype[name] = function() {
+      var wrapped = this._wrapped;
+      method.apply(wrapped, arguments);
+      var length = wrapped.length;
+      if ((name == 'shift' || name == 'splice') && length === 0) delete wrapped[0];
+      return result(wrapped, this._chain);
+    };
+  });
+
+  // Add all accessor Array functions to the wrapper.
+  each(['concat', 'join', 'slice'], function(name) {
+    var method = ArrayProto[name];
+    wrapper.prototype[name] = function() {
+      return result(method.apply(this._wrapped, arguments), this._chain);
+    };
+  });
+
+  // Start chaining a wrapped Underscore object.
+  wrapper.prototype.chain = function() {
+    this._chain = true;
+    return this;
+  };
+
+  // Extracts the result from a wrapped and chained object.
+  wrapper.prototype.value = function() {
+    return this._wrapped;
+  };
+
+}).call(this);

content/docs/kie/0.1.0/_static/underscore.js

diff --git a/content/docs/kie/0.1.0/_static/underscore.js b/content/docs/kie/0.1.0/_static/underscore.js
new file mode 100644
index 0000000..5b55f32
--- /dev/null
+++ b/content/docs/kie/0.1.0/_static/underscore.js
@@ -0,0 +1,31 @@
+// Underscore.js 1.3.1
+// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
+// Underscore is freely distributable under the MIT license.
+// Portions of Underscore are inspired or borrowed from Prototype,
+// Oliver Steele's Functional, and John Resig's Micro-Templating.
+// For all details and documentation:
+// http://documentcloud.github.com/underscore
+(function(){function q(a,c,d){if(a===c)return a!==0||1/a==1/c;if(a==null||c==null)return a===c;if(a._chain)a=a._wrapped;if(c._chain)c=c._wrapped;if(a.isEqual&&b.isFunction(a.isEqual))return a.isEqual(c);if(c.isEqual&&b.isFunction(c.isEqual))return c.isEqual(a);var e=l.call(a);if(e!=l.call(c))return false;switch(e){case "[object String]":return a==String(c);case "[object Number]":return a!=+a?c!=+c:a==0?1/a==1/c:a==+c;case "[object Date]":case "[object Boolean]":return+a==+c;case "[object RegExp]":return a.source==
+c.source&&a.global==c.global&&a.multiline==c.multiline&&a.ignoreCase==c.ignoreCase}if(typeof a!="object"||typeof c!="object")return false;for(var f=d.length;f--;)if(d[f]==a)return true;d.push(a);var f=0,g=true;if(e=="[object Array]"){if(f=a.length,g=f==c.length)for(;f--;)if(!(g=f in a==f in c&&q(a[f],c[f],d)))break}else{if("constructor"in a!="constructor"in c||a.constructor!=c.constructor)return false;for(var h in a)if(b.has(a,h)&&(f++,!(g=b.has(c,h)&&q(a[h],c[h],d))))break;if(g){for(h in c)if(b.has(c,
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content/docs/kie/0.1.0/configuration.html

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+  <meta charset="utf-8">
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+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+  <title>User guides &mdash; servicecomb-kie  documentation</title>
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+    <link rel="index" title="Index" href="genindex.html" />
+    <link rel="search" title="Search" href="search.html" />
+    <link rel="next" title="Storage" href="configurations/storage.html" />
+    <link rel="prev" title="Quick start" href="getstarted/install.html" /> 
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+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="intro.html">Introductions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="get-started.html">Get started</a></li>
+<li class="toctree-l1 current"><a class="current reference internal" href="#">User guides</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="configurations/storage.html">Storage</a></li>
+<li class="toctree-l2"><a class="reference internal" href="configurations/registry.html">Registry</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="development-guide.html">Development Guide</a></li>
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+  <div class="section" id="user-guides">
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\ No newline at end of file

content/docs/kie/0.1.0/configurations/registry.html

diff --git a/content/docs/kie/0.1.0/configurations/registry.html b/content/docs/kie/0.1.0/configurations/registry.html
new file mode 100644
index 0000000..e53e96d
--- /dev/null
+++ b/content/docs/kie/0.1.0/configurations/registry.html
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+
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+<head>
+  <meta charset="utf-8">
+  
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+    <link rel="search" title="Search" href="../search.html" />
+    <link rel="next" title="Development Guide" href="../development-guide.html" />
+    <link rel="prev" title="Storage" href="storage.html" /> 
+</head>
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+
+        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
+          
+            
+            
+              
+            
+            
+              <p class="caption"><span class="caption-text">User Documentations</span></p>
+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="../intro.html">Introductions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="../configuration.html">User guides</a><ul class="current">
+<li class="toctree-l2"><a class="reference internal" href="storage.html">Storage</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Registry</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#options">Options</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#example">Example</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../development-guide.html">Development Guide</a></li>
+</ul>
+
+            
+          
+        </div>
+      </div>
+    </nav>
+
+    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
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+      <nav class="wy-nav-top" aria-label="top navigation">
+        
+          <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
+          <a href="../index.html">servicecomb-kie</a>
+        
+      </nav>
+
+
+      <div class="wy-nav-content">
+        
+        <div class="rst-content">
+        
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+
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+<div role="navigation" aria-label="breadcrumbs navigation">
+
+  <ul class="wy-breadcrumbs">
+    
+      <li><a href="../index.html">Docs</a> &raquo;</li>
+        
+          <li><a href="../configuration.html">User guides</a> &raquo;</li>
+        
+      <li>Registry</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
+        
+            
+            <a href="../_sources/configurations/registry.md.txt" rel="nofollow"> View page source</a>
+          
+        
+      </li>
+    
+  </ul>
+
+  
+  <hr/>
+</div>
+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="registry">
+<h1>Registry<a class="headerlink" href="#registry" title="Permalink to this headline">¶</a></h1>
+<p>kie server is able to register to a registry, so that other client is able to discover it registry service.
+by default registry feature is disabled.</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">cse</span><span class="p">:</span>
+  <span class="nt">service</span><span class="p">:</span>
+    <span class="nt">registry</span><span class="p">:</span>
+      <span class="nt">disabled</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+<span class="nn">...</span>
+</pre></div>
+</div>
+<p>For example, kie is able to register to ServiceComb service center.</p>
+<div class="section" id="options">
+<h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
+<p>the function is powered by go-chassis in chassis.yaml file
+refer to https://docs.go-chassis.com/user-guides/registry.html</p>
+</div>
+<div class="section" id="example">
+<h2>Example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
+<p>Register to ServiceComb service center</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">cse</span><span class="p">:</span>
+  <span class="nt">service</span><span class="p">:</span>
+    <span class="nt">registry</span><span class="p">:</span>
+      <span class="nt">address</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">http://127.0.0.1:30100</span>
+<span class="nn">...</span>
+</pre></div>
+</div>
+</div>
+</div>
+
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+           
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+  
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content/docs/kie/0.1.0/configurations/storage.html

diff --git a/content/docs/kie/0.1.0/configurations/storage.html b/content/docs/kie/0.1.0/configurations/storage.html
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--- /dev/null
+++ b/content/docs/kie/0.1.0/configurations/storage.html
@@ -0,0 +1,244 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
+<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
+<head>
+  <meta charset="utf-8">
+  
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  
+  <title>Storage &mdash; servicecomb-kie  documentation</title>
+  
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+  
+  <script type="text/javascript" src="../_static/js/modernizr.min.js"></script>
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+    <link rel="index" title="Index" href="../genindex.html" />
+    <link rel="search" title="Search" href="../search.html" />
+    <link rel="next" title="Registry" href="registry.html" />
+    <link rel="prev" title="User guides" href="../configuration.html" /> 
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+        <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
+          
+            
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+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="../intro.html">Introductions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="../configuration.html">User guides</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Storage</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#options">Options</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#example">Example</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="registry.html">Registry</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../development-guide.html">Development Guide</a></li>
+</ul>
+
+            
+          
+        </div>
+      </div>
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+
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+          <a href="../index.html">servicecomb-kie</a>
+        
+      </nav>
+
+
+      <div class="wy-nav-content">
+        
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+
+  <ul class="wy-breadcrumbs">
+    
+      <li><a href="../index.html">Docs</a> &raquo;</li>
+        
+          <li><a href="../configuration.html">User guides</a> &raquo;</li>
+        
+      <li>Storage</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
+        
+            
+            <a href="../_sources/configurations/storage.md.txt" rel="nofollow"> View page source</a>
+          
+        
+      </li>
+    
+  </ul>
+
+  
+  <hr/>
+</div>
+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="storage">
+<h1>Storage<a class="headerlink" href="#storage" title="Permalink to this headline">¶</a></h1>
+<p>you can use mongo db as kie server storage to save configuration</p>
+<div class="section" id="options">
+<h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
+<p><strong>uri</strong></p>
+<blockquote>
+<div><p><em>(required, string)</em> db uri</p>
+</div></blockquote>
+<p><strong>timeout</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> db operation timeout</p>
+</div></blockquote>
+<p><strong>sslEnabled</strong></p>
+<blockquote>
+<div><p><em>(optional, bool)</em>  enable TLS communication to mongodb server</p>
+</div></blockquote>
+<p><strong>rootCAFile</strong></p>
+<blockquote>
+<div><p><em>(optional, bool)</em>  if sslEnabled is true, you must give a ca file</p>
+</div></blockquote>
+</div>
+<div class="section" id="example">
+<h2>Example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">db</span><span class="p">:</span>
+  <span class="nt">uri</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">mongodb://kie:123@127.0.0.1:27017</span>
+  <span class="nt">poolSize</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">10</span>
+  <span class="nt">timeout</span><span class="p">:</span>  <span class="l l-Scalar l-Scalar-Plain">5m</span>
+  <span class="nt">sslEnabled</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+  <span class="nt">rootCAFile</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/opt/kie/ca.crt</span>
+</pre></div>
+</div>
+</div>
+</div>
+
+
+           </div>
+           
+          </div>
+          <footer>
+  
+    <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
+      
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content/docs/kie/0.1.0/development-guide.html

diff --git a/content/docs/kie/0.1.0/development-guide.html b/content/docs/kie/0.1.0/development-guide.html
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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+<h1>Development Guide<a class="headerlink" href="#development-guide" title="Permalink to this headline">¶</a></h1>
+<div class="toctree-wrapper compound">
+<ul>
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content/docs/kie/0.1.0/development-guide/build.html

diff --git a/content/docs/kie/0.1.0/development-guide/build.html b/content/docs/kie/0.1.0/development-guide/build.html
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+
+
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+    
+    <script type="text/javascript" src="../_static/js/theme.js"></script>
+
+    
+
+  
+  <link rel="stylesheet" href="../_static/css/theme.css" type="text/css" />
+  <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
+    <link rel="index" title="Index" href="../genindex.html" />
+    <link rel="search" title="Search" href="../search.html" />
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+</head>
+
+<body class="wy-body-for-nav">
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+  <form id="rtd-search-form" class="wy-form" action="../search.html" method="get">
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+          
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+            
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+              <p class="caption"><span class="caption-text">User Documentations</span></p>
+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="../intro.html">Introductions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../configuration.html">User guides</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="../development-guide.html">Development Guide</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Build</a></li>
+</ul>
+</li>
+</ul>
+
+            
+          
+        </div>
+      </div>
+    </nav>
+
+    <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
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+      <nav class="wy-nav-top" aria-label="top navigation">
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+          <a href="../index.html">servicecomb-kie</a>
+        
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+
+
+      <div class="wy-nav-content">
+        
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+<div role="navigation" aria-label="breadcrumbs navigation">
+
+  <ul class="wy-breadcrumbs">
+    
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+        
+          <li><a href="../development-guide.html">Development Guide</a> &raquo;</li>
+        
+      <li>Build</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
+        
+            
+            <a href="../_sources/development-guide/build.md.txt" rel="nofollow"> View page source</a>
+          
+        
+      </li>
+    
+  </ul>
+
+  
+  <hr/>
+</div>
+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="build">
+<h1>Build<a class="headerlink" href="#build" title="Permalink to this headline">¶</a></h1>
+<p>Download and run mongodb,
+see <a class="reference external" href="https://docs.mongodb.com/manual/installation/#mongodb-community-edition-installation-tutorials">MongoDB Community Edition Installation Tutorials</a></p>
+<p>Write a script to create a user</p>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>cat &lt;&lt;EOM &gt; native_db.js
+db.createUser(
+    {
+        user: &quot;root&quot;,
+        pwd: &quot;root&quot;,
+        roles:[
+            {
+                role: &quot;readWrite&quot;,
+                db:   &quot;kie&quot;
+            }
+        ]
+    }
+);
+EOM
+</pre></div>
+</div>
+<p>Exec native_db.js</p>
+<div class="highlight-shell script bash notranslate"><div class="highlight"><pre><span></span>mongo 127.0.0.1/kie native_db.js
+</pre></div>
+</div>
+<p>Build serivcecomb-kie binary</p>
+<div class="highlight-shell script bash notranslate"><div class="highlight"><pre><span></span>cd ${servicecomb_root_path}
+build/build_binary.sh
+</pre></div>
+</div>
+<p>This will build 4 packages for 4 different platforms in ${servicecomb_root_path}/release/kie directory.
+Choose the right one and unzip and run it.
+For Example:</p>
+<div class="highlight-shell script bash notranslate"><div class="highlight"><pre><span></span>cd ${servicecomb_root_path}/release/kie
+tar -xzvf apache-servicecomb-kie--${platform}-amd64.tar.gz
+cd apache-servicecomb-kie--${platform}-amd64
+./kie --config conf/kie-conf.yaml
+</pre></div>
+</div>
+</div>
+
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+           </div>
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+          </div>
+          <footer>
+  
+    <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
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content/docs/kie/0.1.0/genindex.html

diff --git a/content/docs/kie/0.1.0/genindex.html b/content/docs/kie/0.1.0/genindex.html
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+++ b/content/docs/kie/0.1.0/genindex.html
@@ -0,0 +1,194 @@
+
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+  
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+  <script type="text/javascript" src="_static/js/modernizr.min.js"></script>
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+      <script type="text/javascript" id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
+        <script type="text/javascript" src="_static/jquery.js"></script>
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+<li class="toctree-l1"><a class="reference internal" href="development-guide.html">Development Guide</a></li>
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content/docs/kie/0.1.0/get-started.html

diff --git a/content/docs/kie/0.1.0/get-started.html b/content/docs/kie/0.1.0/get-started.html
new file mode 100644
index 0000000..ff5d2eb
--- /dev/null
+++ b/content/docs/kie/0.1.0/get-started.html
@@ -0,0 +1,216 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
+<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
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+<li class="toctree-l2"><a class="reference internal" href="getstarted/install.html">Quick start</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="configuration.html">User guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="development-guide.html">Development Guide</a></li>
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+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="get-started">
+<h1>Get started<a class="headerlink" href="#get-started" title="Permalink to this headline">¶</a></h1>
+<div class="toctree-wrapper compound">
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="getstarted/install.html">Quick start</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="getstarted/install.html#with-docker">With docker</a></li>
+<li class="toctree-l2"><a class="reference internal" href="getstarted/install.html#run-locally-with-docker-compose">Run locally with Docker compose</a></li>
+<li class="toctree-l2"><a class="reference internal" href="getstarted/install.html#run-locally-without-docker">Run locally without Docker</a></li>
+</ul>
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content/docs/kie/0.1.0/getstarted/install.html

diff --git a/content/docs/kie/0.1.0/getstarted/install.html b/content/docs/kie/0.1.0/getstarted/install.html
new file mode 100644
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+++ b/content/docs/kie/0.1.0/getstarted/install.html
@@ -0,0 +1,328 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+    <link rel="next" title="User guides" href="../configuration.html" />
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+<li class="toctree-l1 current"><a class="reference internal" href="../get-started.html">Get started</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Quick start</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#with-docker">With docker</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#run-locally-with-docker-compose">Run locally with Docker compose</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#run-locally-without-docker">Run locally without Docker</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../configuration.html">User guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../development-guide.html">Development Guide</a></li>
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+        
+      <li>Quick start</li>
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+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="quick-start">
+<h1>Quick start<a class="headerlink" href="#quick-start" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="with-docker">
+<h2>With docker<a class="headerlink" href="#with-docker" title="Permalink to this headline">¶</a></h2>
+<p>Run mongodb server</p>
+<p>write a script to create a user</p>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>cat &lt;&lt;EOM &gt; db.js
+db.createUser(
+    {
+        user: &quot;root&quot;,
+        pwd: &quot;root&quot;,
+        roles:[
+            {
+                role: &quot;readWrite&quot;,
+                db:   &quot;kie&quot;
+            }
+        ]
+    }
+);
+EOM
+</pre></div>
+</div>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>sudo docker run --name mongo -d \
+    -e &quot;MONGO_INITDB_DATABASE=kie&quot; \
+    -e &quot;MONGO_INITDB_ROOT_USERNAME=root&quot; \
+    -e &quot;MONGO_INITDB_ROOT_PASSWORD=root&quot; \
+    -p 27017:27017 \
+    -v ${PWD}/db.js:/docker-entrypoint-initdb.d/db.js:ro \
+    mongo:3.4
+</pre></div>
+</div>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>export MONGO_IP=`sudo docker inspect --format &#39;{{ .NetworkSettings.IPAddress }}&#39; mongo`
+</pre></div>
+</div>
+<p>Run kie server</p>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>sudo docker run --name kie-server -d \
+    -e &quot;MONGODB_ADDR=${MONGO_IP}:27017&quot; \
+    -e &quot;MONGODB_USER=root&quot; \
+    -e &quot;MONGODB_PWD=root&quot; \
+    -p 30110:30110 \
+    servicecomb/kie
+</pre></div>
+</div>
+<p>Put a key</p>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>curl -X PUT \
+  http://127.0.0.1:30110/v1/default/kie/kv/ingressRule.http \
+  -H &#39;Content-Type: application/json&#39; \
+  -d &#39;{
+	&quot;value&quot;:&quot;some rule&quot;,
+	&quot;type&quot;: &quot;yaml&quot;,
+	&quot;labels&quot;:{&quot;app&quot;:&quot;default&quot;}
+}&#39;
+</pre></div>
+</div>
+<p>response is</p>
+<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
+    <span class="nt">&quot;_id&quot;</span><span class="p">:</span> <span class="s2">&quot;5d6f27c5a1b287c5074e4538&quot;</span><span class="p">,</span>
+    <span class="nt">&quot;label_id&quot;</span><span class="p">:</span> <span class="s2">&quot;5d6f27c5a1b287c5074e4537&quot;</span><span class="p">,</span>
+    <span class="nt">&quot;key&quot;</span><span class="p">:</span> <span class="s2">&quot;ingressRule.http&quot;</span><span class="p">,</span>
+    <span class="nt">&quot;value&quot;</span><span class="p">:</span> <span class="s2">&quot;rule&quot;</span><span class="p">,</span>
+    <span class="nt">&quot;value_type&quot;</span><span class="p">:</span> <span class="s2">&quot;text&quot;</span><span class="p">,</span>
+    <span class="nt">&quot;labels&quot;</span><span class="p">:</span> <span class="p">{</span>
+        <span class="nt">&quot;app&quot;</span><span class="p">:</span> <span class="s2">&quot;default&quot;</span>
+    <span class="p">},</span>
+    <span class="nt">&quot;revision&quot;</span><span class="p">:</span> <span class="mi">1</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="run-locally-with-docker-compose">
+<h2>Run locally with Docker compose<a class="headerlink" href="#run-locally-with-docker-compose" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>git clone git@github.com:apache/servicecomb-kie.git
+<span class="nb">cd</span> servicecomb-kie/deployments/docker
+sudo docker-compose up
+</pre></div>
+</div>
+<p>it will launch 3 components</p>
+<ul class="simple">
+<li><p>mongodb: 127.0.0.1:27017</p></li>
+<li><p>mongodb UI:http://127.0.0.1:8081</p></li>
+<li><p>servicecomb-kie: http://127.0.0.1:30110</p></li>
+</ul>
+</div>
+<div class="section" id="run-locally-without-docker">
+<h2>Run locally without Docker<a class="headerlink" href="#run-locally-without-docker" title="Permalink to this headline">¶</a></h2>
+<p>Download and run mongodb,
+see <a class="reference external" href="https://docs.mongodb.com/manual/installation/#mongodb-community-edition-installation-tutorials">MongoDB Community Edition Installation Tutorials</a></p>
+<p>Write a script to create a user</p>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>cat &lt;&lt;EOM &gt; native_db.js
+db.createUser(
+    {
+        user: &quot;root&quot;,
+        pwd: &quot;root&quot;,
+        roles:[
+            {
+                role: &quot;readWrite&quot;,
+                db:   &quot;kie&quot;
+            }
+        ]
+    }
+);
+EOM
+</pre></div>
+</div>
+<p>Exec native_db.js</p>
+<div class="highlight-shell script bash notranslate"><div class="highlight"><pre><span></span>mongo 127.0.0.1/kie native_db.js
+</pre></div>
+</div>
+<p>Download the binary of kie, see https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/
+Unzip  and Run it.
+For Example:</p>
+<div class="highlight-shell script bash notranslate"><div class="highlight"><pre><span></span>tar -xzvf apache-servicecomb-kie--${platform}-amd64.tar.gz
+cd apache-servicecomb-kie--${platform}-amd64
+./kie --config conf/kie-conf.yaml
+</pre></div>
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+
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+<li class="toctree-l2 current"><a class="current reference internal" href="#">Concepts</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#labels">Labels</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#key-value">key value</a></li>
+</ul>
+</li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../configuration.html">User guides</a></li>
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+        
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+           <div itemprop="articleBody">
+            
+  <div class="section" id="concepts">
+<h1>Concepts<a class="headerlink" href="#concepts" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="labels">
+<h2>Labels<a class="headerlink" href="#labels" title="Permalink to this headline">¶</a></h2>
+<p>key value must belong to a identical label,
+a labels is equivalent to a map, it is represent as a json object</p>
+<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
+<span class="nt">&quot;app&quot;</span><span class="p">:</span> <span class="s2">&quot;some_app&quot;</span><span class="p">,</span>
+<span class="nt">&quot;service&quot;</span><span class="p">:</span> <span class="s2">&quot;payment&quot;</span><span class="p">,</span>
+<span class="nt">&quot;environment&quot;</span><span class="p">:</span> <span class="s2">&quot;production&quot;</span><span class="p">,</span>
+<span class="nt">&quot;version&quot;</span><span class="p">:</span> <span class="s2">&quot;1.0.1&quot;</span>
+<span class="p">}</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="key-value">
+<h2>key value<a class="headerlink" href="#key-value" title="Permalink to this headline">¶</a></h2>
+<p>A key is usually related to some function in your program, let’s say a new web UI should enable or not.
+the labels is just like a map to tell you where this program located in. the map says,
+it is located in production environment,the version is 1.0.1</p>
+<div class="highlight-json notranslate"><div class="highlight"><pre><span></span><span class="p">{</span>
+	<span class="nt">&quot;value&quot;</span><span class="p">:</span><span class="s2">&quot;true&quot;</span><span class="p">,</span>
+	<span class="nt">&quot;labels&quot;</span><span class="p">:{</span>
+              <span class="nt">&quot;service&quot;</span><span class="p">:</span> <span class="s2">&quot;web-console&quot;</span><span class="p">,</span>
+              <span class="nt">&quot;environment&quot;</span><span class="p">:</span> <span class="s2">&quot;production&quot;</span><span class="p">,</span>
+              <span class="nt">&quot;version&quot;</span><span class="p">:</span> <span class="s2">&quot;1.0.1&quot;</span>
+             <span class="p">}</span>
+<span class="p">}</span>
+</pre></div>
+</div>
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+  <div class="section" id="what-is-servicecomb-kie">
+<h1>What is ServiceComb kie<a class="headerlink" href="#what-is-servicecomb-kie" title="Permalink to this headline">¶</a></h1>
+<p>ServiceComb kie is a config server which manage configurations in a distributed system.
+It is also a micro service in ServiceComb ecosystem and developed by <a class="reference external" href="https://github.com/go-chassis/go-chassis">go-chassis</a>
+we call it ServiceComb Native application.</p>
+</div>
+<div class="section" id="why-use-servicecomb-kie">
+<h1>Why use ServiceComb kie<a class="headerlink" href="#why-use-servicecomb-kie" title="Permalink to this headline">¶</a></h1>
+<p>Since it is a ServiceComb Native application,
+the user of ServiceComb is able to integrate with it easily,
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content/docs/kie/0.1.0/searchindex.js

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new file mode 100644
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content/docs/linuxcon-workshop-demo/index.html

diff --git a/content/docs/linuxcon-workshop-demo/index.html b/content/docs/linuxcon-workshop-demo/index.html
new file mode 100644
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+    <meta itemprop="headline" content="Linux Con Workshop Demo">
+    <meta itemprop="description" content="A step by step guide on how to use ServiceComb to develop a complete project">
+    <meta itemprop="datePublished" content="June 15, 2017">
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+
+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Linux Con Workshop Demo
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>为了读者能更容易了解ServiceComb微服务框架的功能以及如何用其快速开发微服务，所以提供大家耳熟能详的例子，降低学习曲线的同时，增加趣味性，加深理解。</p>
+
+<p>本文中假设我们成立了一家科研公司，处理复杂的数学运算，以及尖端生物科技研究，并为用户提供如下服务：</p>
+
+<ul>
+  <li>
+    <p>黄金分割数列计算</p>
+  </li>
+  <li>
+    <p>蜜蜂繁殖规律 (计算每只雄蜂/雌蜂的祖先数量)</p>
+  </li>
+</ul>
+
+<p>但是我们如何将公司的这些强大运算能力提供给我们的消费者呢？</p>
+
+<p>首先我们通过认证服务保障公司的计算资源没有被滥用， 同时我们对外提供Rest服务让用户来进行访问。 下面的视频展示具体的服务验证调用的情况。</p>
+
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+  <li><a href="#业务场景" id="markdown-toc-业务场景">业务场景</a></li>
+  <li><a href="#公司结构-系统架构" id="markdown-toc-公司结构-系统架构">公司结构 (系统架构)</a></li>
+  <li><a href="#技工-worker" id="markdown-toc-技工-worker">技工 (Worker)</a>    <ul>
+      <li><a href="#黄金分割运算服务" id="markdown-toc-黄金分割运算服务">黄金分割运算服务</a></li>
+      <li><a href="#技工服务端点" id="markdown-toc-技工服务端点">技工服务端点</a></li>
+    </ul>
+  </li>
+  <li><a href="#告示栏-bulletin-board" id="markdown-toc-告示栏-bulletin-board">告示栏 (Bulletin Board)</a></li>
+  <li><a href="#养蜂人-beekeeper" id="markdown-toc-养蜂人-beekeeper">养蜂人 (Beekeeper)</a>    <ul>
+      <li><a href="#蜜蜂繁殖规律研究服务" id="markdown-toc-蜜蜂繁殖规律研究服务">蜜蜂繁殖规律研究服务</a></li>
+      <li><a href="#养蜂人服务端点" id="markdown-toc-养蜂人服务端点">养蜂人服务端点</a></li>
+    </ul>
+  </li>
+  <li><a href="#门卫-doorman" id="markdown-toc-门卫-doorman">门卫 (Doorman)</a>    <ul>
+      <li><a href="#门卫认证服务" id="markdown-toc-门卫认证服务">门卫认证服务</a></li>
+      <li><a href="#门卫认证服务端点" id="markdown-toc-门卫认证服务端点">门卫认证服务端点</a></li>
+    </ul>
+  </li>
+  <li><a href="#经理-manager" id="markdown-toc-经理-manager">经理 (Manager)</a>    <ul>
+      <li><a href="#用户认证服务" id="markdown-toc-用户认证服务">用户认证服务</a></li>
+      <li><a href="#请求过滤" id="markdown-toc-请求过滤">请求过滤</a></li>
+    </ul>
+  </li>
+  <li><a href="#项目归档-project-archive" id="markdown-toc-项目归档-project-archive">项目归档 (Project Archive)</a></li>
+  <li><a href="#人力资源-human-resource" id="markdown-toc-人力资源-human-resource">人力资源 (Human Resource)</a></li>
+  <li><a href="#总结" id="markdown-toc-总结">总结</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="业务场景">业务场景</h2>
+<p>让我们先对业务场景进行总结分析</p>
+
+<ol>
+  <li>
+    <p>为了公司持续发展，我们需要对用户消费的运算能力收费，所以我们聘用了<strong>门卫</strong>认证用户，避免不法分子混入</p>
+  </li>
+  <li>
+    <p>为了提供足够的黄金分割数量运算能力，我们需要雇佣相应的<strong>技工</strong></p>
+  </li>
+  <li>
+    <p>为了持续研究蜜蜂繁殖规律，公司建立了自己的蜂场，需要相应的<strong>养蜂人</strong>进行管理研究</p>
+  </li>
+  <li>
+    <p>为了平衡<strong>技工</strong>、<strong>养蜂人</strong>、和<strong>门卫</strong>的工作量和时间，我们建立了<strong>告示栏</strong>机制，让当前有闲暇的人员发布自己的联系方式，以便我们能及时联系技能匹配的人员以服务到来的用户</p>
+  </li>
+  <li>
+    <p>因为运算能力成本高昂，我们将运算项目进行了<strong>归档</strong>，以便未来有相同请求时，我们能直接查询<strong>项目归档</strong>，节省公司运算成本</p>
+  </li>
+  <li>
+    <p>面对上述复杂的场景，我们又聘用了<strong>部门经理</strong>来管理公司成员和设施</p>
+  </li>
+  <li>
+    <p>最后，当公司日益壮大，用户数量暴涨时，我们还需要招聘更多<strong>技工</strong>、<strong>养蜂人</strong>、和<strong>门卫</strong>，所以增加了<strong>人力资源</strong>部门</p>
+  </li>
+</ol>
+
+<h2 id="公司结构-系统架构">公司结构 (系统架构)</h2>
+<p>到现在业务场景已经比较清晰，我们把上述职务部门和设施画成公司组织结构图。
+<img src="/assets/images/workshop-company-structure.png" alt="company structure" class="align-center" /></p>
+
+<p>现在公司组织结构已经完整，让我们着手搭建相应部门。</p>
+
+<h2 id="技工-worker">技工 (Worker)</h2>
+<p>因为技工最为简单，对其他部门人员依赖最少，我们首先搭建这个部门。</p>
+
+<h3 id="黄金分割运算服务">黄金分割运算服务</h3>
+<p>技工的主要工作时提供黄金分割数列计算服务，当用户需要知道第n个黄金分割数时，技工以最快的速度计算出数值并返回给用户。
+我们可以把这个工作简化为如下数学方程:</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>value = fibo(n)
+</code></pre></div></div>
+
+<p>在暂时不考虑性能的情况下，我们可以迅速实现黄金分割数列的计算。</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">interface</span> <span class="nc">FibonacciService</span> <span class="o">{</span>
+  <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="nd">@Service</span>
+<span class="kd">class</span> <span class="nc">FibonacciServiceImpl</span> <span class="kd">implements</span> <span class="nc">FibonacciService</span> <span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">n</span> <span class="o">==</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+    <span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(</span><span class="n">n</span> <span class="o">==</span> <span class="mi">1</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">1</span><span class="o">;</span>
+    <span class="o">}</span>
+
+    <span class="k">return</span> <span class="nf">term</span><span class="o">(</span><span class="n">n</span> <span class="o">-</span> <span class="mi">1</span><span class="o">)</span> <span class="o">+</span> <span class="n">term</span><span class="o">(</span><span class="n">n</span> <span class="o">-</span> <span class="mi">2</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="技工服务端点">技工服务端点</h3>
+<p>黄金分割数量运算已经实现，现在我们需要将服务提供给用户，首先我们定义端点接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">FibonacciEndpoint</span> <span class="o">{</span>
+  <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>引入 <code class="highlighter-rouge">ServiceComb</code> 依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+
+</code></pre></div></div>
+
+<p>接下来我们同时暴露黄金分割运算服务的<strong>Restful</strong>和<strong>RPC</strong>端点：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"fibonacciRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/fibonacci"</span><span class="o">)</span>
+<span class="nd">@Controller</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">FibonacciRestEndpoint</span> <span class="kd">implements</span> <span class="nc">FibonacciEndpoint</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">FibonacciRestEndpoint</span><span class="o">(</span><span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">fibonacciService</span> <span class="o">=</span> <span class="n">fibonacciService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/term"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">fibonacciService</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">n</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RpcSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"fibonacciRpcEndpoint"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">FibonacciRpcEndpoint</span> <span class="kd">implements</span> <span class="nc">FibonacciEndpoint</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="kd">public</span> <span class="nf">FibonacciRpcEndpoint</span><span class="o">(</span><span class="nc">FibonacciService</span> <span class="n">fibonacciService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">fibonacciService</span> <span class="o">=</span> <span class="n">fibonacciService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">fibonacciService</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">n</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>这里用 <code class="highlighter-rouge">@RestSchema</code> 和 <code class="highlighter-rouge">@RpcSchema</code> 注释两个端点后，<code class="highlighter-rouge">ServiceComb</code> 会自动生成对应的服务端点契约，根据如下
+<code class="highlighter-rouge">microsevice.yaml</code> 配置端点端口，并将契约和服务一起注册到<a href="https://github.com/apache/incubator-servicecomb-service-center">Service Center</a>：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># all interconnected microservices must belong to an application wth the same ID</span>
+<span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+<span class="c1"># name of the declaring microservice</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">worker</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="c1"># service center address</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+
+<p>最后，提供技工服务应用启动入口，并加上 <code class="highlighter-rouge">@EnableServiceComb</code> 注释启用 <code class="highlighter-rouge">ServiceComb</code> ：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">WorkerApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">WorkerApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="告示栏-bulletin-board">告示栏 (Bulletin Board)</h2>
+<p><strong>告示栏</strong>提供为<strong>门卫</strong>、<strong>技工</strong>和<strong>养蜂人</strong>注册联系方式的设施，同时<strong>经理</strong>和<strong>养蜂人</strong>可通过此设施查询注册方的联系方式，以方便匹配能力的提供和消费。</p>
+
+<p><code class="highlighter-rouge">Service Center</code> 提供契约和服务注册、发现功能，而且校验服务提供方和消费方的契约是否匹配，我们可以<a href="https://github.com/apache/incubator-servicecomb-service-center/releases">下载</a>编译好的版本直接运行。</p>
+
+<h2 id="养蜂人-beekeeper">养蜂人 (Beekeeper)</h2>
+<p><strong>养蜂人</strong>研究蜜蜂繁殖规律，计算每只蜜蜂 (雄蜂/雌蜂) 的祖先数量。因为蜜蜂繁殖规律和黄金分割数列相关，所以<strong>养蜂人</strong>同时消费<strong>技工</strong>提供的计算服务。</p>
+
+<p><a href="http://www.dave-cushman.net/bee/fibonacci.html">研究</a>表明，雄蜂(Drone)由未受精卵孵化而生，只有母亲；而雌蜂(Queen)由受精卵孵化而生，既有母又有父。</p>
+
+<p class="figure-caption"><img src="/assets/images/fibonaccitree.gif" alt="fibonacci tree" />
+Credit: <a href="http://www.dave-cushman.net&quot;">Dave Cushman’s website</a></p>
+
+<p>参考上图，蜜蜂的某一代祖先数量符合黄金分割数列的模型，由此我们可以很快实现服务功能。</p>
+
+<h3 id="蜜蜂繁殖规律研究服务">蜜蜂繁殖规律研究服务</h3>
+<p>首先我们定义黄金数列运算接口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">FibonacciCalculator</span> <span class="o">{</span>
+
+  <span class="kt">long</span> <span class="nf">term</span><span class="o">(</span><span class="kt">int</span> <span class="n">n</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>接下来定义并实现蜜蜂繁殖规律研究服务:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">interface</span> <span class="nc">BeekeeperService</span> <span class="o">{</span>
+  <span class="kt">long</span> <span class="nf">ancestorsOfDroneAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">);</span>
+
+  <span class="kt">long</span> <span class="nf">ancestorsOfQueenAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="kd">class</span> <span class="nc">BeekeeperServiceImpl</span> <span class="kd">implements</span> <span class="nc">BeekeeperService</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">FibonacciCalculator</span> <span class="n">fibonacciCalculator</span><span class="o">;</span>
+
+  <span class="nc">BeekeeperServiceImpl</span><span class="o">(</span><span class="nc">FibonacciCalculator</span> <span class="n">fibonacciCalculator</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">fibonacciCalculator</span> <span class="o">=</span> <span class="n">fibonacciCalculator</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">ancestorsOfDroneAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">generation</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="n">fibonacciCalculator</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">generation</span> <span class="o">+</span> <span class="mi">1</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">ancestorsOfQueenAt</span><span class="o">(</span><span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">generation</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="mi">0</span><span class="o">;</span>
+    <span class="o">}</span>
+    <span class="k">return</span> <span class="n">fibonacciCalculator</span><span class="o">.</span><span class="na">term</span><span class="o">(</span><span class="n">generation</span> <span class="o">+</span> <span class="mi">2</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>这里我们用到之前定义的 <code class="highlighter-rouge">FibonacciCalculator</code> 接口，并希望通过这个接口远程调用<strong>技工</strong>服务端点。<code class="highlighter-rouge">@RpcReference</code>
+注释能帮助我们自动从<a href="https://github.com/apache/incubator-servicecomb-service-center">Service Center</a>中获取
+<code class="highlighter-rouge">microserviceName = "worker", schemaId = "fibonacciRpcEndpoint"</code> ， 即服务名为 <code class="highlighter-rouge">worker</code> 已经schema ID为
+<code class="highlighter-rouge">fibonacciRpcEndpoint</code>的端点：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Configuration</span>
+<span class="kd">class</span> <span class="nc">BeekeeperConfig</span> <span class="o">{</span>
+
+  <span class="nd">@RpcReference</span><span class="o">(</span><span class="n">microserviceName</span> <span class="o">=</span> <span class="s">"worker"</span><span class="o">,</span> <span class="n">schemaId</span> <span class="o">=</span> <span class="s">"fibonacciRpcEndpoint"</span><span class="o">)</span>
+  <span class="kd">private</span> <span class="nc">FibonacciCalculator</span> <span class="n">fibonacciCalculator</span><span class="o">;</span>
+
+  <span class="nd">@Bean</span>
+  <span class="nc">BeekeeperService</span> <span class="nf">beekeeperService</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">BeekeeperServiceImpl</span><span class="o">(</span><span class="n">fibonacciCalculator</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>我们在<strong>技工</strong>一节已定义好对应的服务名和schema ID端点，通过上面的配置，<code class="highlighter-rouge">ServiceComb</code> 会自动将远程<strong>技工</strong>服务
+实例和 <code class="highlighter-rouge">FibonacciCalculator</code> 绑定在一起。</p>
+
+<h3 id="养蜂人服务端点">养蜂人服务端点</h3>
+<p>与上一节<strong>技工</strong>服务相似，我们在这里也需要提供养蜂人服务端点，让用户可以进行调用：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"beekeeperRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/rest"</span><span class="o">)</span>
+<span class="nd">@Controller</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">BeekeeperController</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">BeekeeperController</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">BeekeeperService</span> <span class="n">beekeeperService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">BeekeeperController</span><span class="o">(</span><span class="nc">BeekeeperService</span> <span class="n">beekeeperService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">beekeeperService</span> <span class="o">=</span> <span class="n">beekeeperService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/drone/ancestors/{generation}"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">GET</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">APPLICATION_JSON_UTF8_VALUE</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="nc">Ancestor</span> <span class="nf">ancestorsOfDrone</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span>
+        <span class="s">"Received request to find the number of ancestors of drone at generation {}"</span><span class="o">,</span>
+        <span class="n">generation</span><span class="o">);</span>
+
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">Ancestor</span><span class="o">(</span><span class="n">beekeeperService</span><span class="o">.</span><span class="na">ancestorsOfDroneAt</span><span class="o">(</span><span class="n">generation</span><span class="o">));</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/queen/ancestors/{generation}"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">GET</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">APPLICATION_JSON_UTF8_VALUE</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="nc">Ancestor</span> <span class="nf">ancestorsOfQueen</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="kt">int</span> <span class="n">generation</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span>
+        <span class="s">"Received request to find the number of ancestors of queen at generation {}"</span><span class="o">,</span>
+        <span class="n">generation</span><span class="o">);</span>
+
+    <span class="k">return</span> <span class="k">new</span> <span class="nf">Ancestor</span><span class="o">(</span><span class="n">beekeeperService</span><span class="o">.</span><span class="na">ancestorsOfQueenAt</span><span class="o">(</span><span class="n">generation</span><span class="o">));</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+
+<span class="kd">class</span> <span class="nc">Ancestor</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kt">long</span> <span class="n">ancestors</span><span class="o">;</span>
+
+  <span class="nc">Ancestor</span><span class="o">()</span> <span class="o">{</span>
+  <span class="o">}</span>
+
+  <span class="nc">Ancestor</span><span class="o">(</span><span class="kt">long</span> <span class="n">ancestors</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">ancestors</span> <span class="o">=</span> <span class="n">ancestors</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="kt">long</span> <span class="nf">getAncestors</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">ancestors</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>因为<strong>养蜂人</strong>需要消费<strong>技工</strong>提供的服务，所以其 <code class="highlighter-rouge">microservice.yaml</code> 配置稍有不同：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># all interconnected microservices must belong to an application wth the same ID</span>
+<span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+<span class="c1"># name of the declaring microservice</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">beekeeper</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8090</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-consumer,loadbalance</span>
+  <span class="na">references</span><span class="pi">:</span>
+<span class="c1">#  this one below must refer to the microservice name it communicates with</span>
+    <span class="na">worker</span><span class="pi">:</span>
+      <span class="na">version-rule</span><span class="pi">:</span> <span class="s">0.0.1</span>
+</code></pre></div></div>
+
+<p>这里我们需要定义 <code class="highlighter-rouge">servicecomb.references.worker.version-rule</code> ，让配置名称中指向<strong>技工</strong>服务名 <code class="highlighter-rouge">worker</code> ，并匹配其版本号。</p>
+
+<p>最后定义养蜂人服务应用入口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">BeekeeperApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">BeekeeperApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="门卫-doorman">门卫 (Doorman)</h2>
+<p><strong>门卫</strong>为公司提供安全保障，屏蔽非合法用户，防止其骗取免费服务，甚至伤害<strong>技工</strong>和<strong>养蜂人</strong>。</p>
+
+<h3 id="门卫认证服务">门卫认证服务</h3>
+<p>认证功能我们采用<a href="https://jwt.io/introduction/">JSON Web Token (JWT)</a>的机制，具体实现超出了这篇文章的范围，
+细节大家可以查看github上<a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">workshop</a>的 <code class="highlighter-rouge">doorman</code> 模块代码。</p>
+
+<p>认证服务的接口如下，<code class="highlighter-rouge">authenticate</code> 方法根据用户名和密码查询确认用户存在，并返回对应JWT token。用户登录后的每次
+请求都需要带上返回的JWT token，而 <code class="highlighter-rouge">validate</code> 方法将验证token以确认其有效。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">AuthenticationService</span> <span class="o">{</span>
+  <span class="nc">String</span> <span class="nf">authenticate</span><span class="o">(</span><span class="nc">String</span> <span class="n">username</span><span class="o">,</span> <span class="nc">String</span> <span class="n">password</span><span class="o">);</span>
+
+  <span class="nc">String</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="门卫认证服务端点">门卫认证服务端点</h3>
+
+<p>与前两节的Rest服务端点相似，我们加上 <code class="highlighter-rouge">@RestSchema</code> 注释，以便 <code class="highlighter-rouge">ServiceComb</code> 自动配置端点、生成契约并注册服务。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"authenticationRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@Controller</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/rest"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">AuthenticationController</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">AuthenticationController</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">USERNAME</span> <span class="o">=</span> <span class="s">"username"</span><span class="o">;</span>
+  <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">PASSWORD</span> <span class="o">=</span> <span class="s">"password"</span><span class="o">;</span>
+  <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">TOKEN</span> <span class="o">=</span> <span class="s">"token"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">AuthenticationController</span><span class="o">(</span><span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">authenticationService</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/login"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">POST</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">TEXT_PLAIN_VALUE</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="nf">login</span><span class="o">(</span>
+      <span class="nd">@RequestParam</span><span class="o">(</span><span class="no">USERNAME</span><span class="o">)</span> <span class="nc">String</span> <span class="n">username</span><span class="o">,</span>
+      <span class="nd">@RequestParam</span><span class="o">(</span><span class="no">PASSWORD</span><span class="o">)</span> <span class="nc">String</span> <span class="n">password</span><span class="o">)</span> <span class="o">{</span>
+
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received login request from user {}"</span><span class="o">,</span> <span class="n">username</span><span class="o">);</span>
+    <span class="nc">String</span> <span class="n">token</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">.</span><span class="na">authenticate</span><span class="o">(</span><span class="n">username</span><span class="o">,</span> <span class="n">password</span><span class="o">);</span>
+    <span class="nc">HttpHeaders</span> <span class="n">headers</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HttpHeaders</span><span class="o">();</span>
+    <span class="n">headers</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="no">AUTHORIZATION</span><span class="o">,</span> <span class="no">TOKEN_PREFIX</span> <span class="o">+</span> <span class="n">token</span><span class="o">);</span>
+
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Authenticated user {} successfully"</span><span class="o">,</span> <span class="n">username</span><span class="o">);</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="s">"Welcome, "</span> <span class="o">+</span> <span class="n">username</span><span class="o">,</span> <span class="n">headers</span><span class="o">,</span> <span class="no">OK</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/validate"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="no">POST</span><span class="o">,</span> <span class="n">consumes</span> <span class="o">=</span> <span class="no">APPLICATION_JSON_UTF8_VALUE</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="no">TEXT_PLAIN_VALUE</span><span class="o">)</span>
+  <span class="nd">@ResponseBody</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">validate</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Token</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received validation request of token {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="k">return</span> <span class="n">authenticationService</span><span class="o">.</span><span class="na">validate</span><span class="o">(</span><span class="n">token</span><span class="o">.</span><span class="na">getToken</span><span class="o">());</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+
+<span class="kd">class</span> <span class="nc">Token</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="nc">String</span> <span class="n">token</span><span class="o">;</span>
+
+  <span class="nc">Token</span><span class="o">()</span> <span class="o">{</span>
+  <span class="o">}</span>
+
+  <span class="nc">Token</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">token</span> <span class="o">=</span> <span class="n">token</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getToken</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">token</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">toString</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="s">"Token{"</span> <span class="o">+</span>
+        <span class="s">"token='"</span> <span class="o">+</span> <span class="n">token</span> <span class="o">+</span> <span class="sc">'\''</span> <span class="o">+</span>
+        <span class="sc">'}'</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>同样，我们需要提供服务应用启动入口以及 <code class="highlighter-rouge">microservice.yaml</code>：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">DoormanApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">DoormanApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1"># all interconnected microservices must belong to an application wth the same ID</span>
+<span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+<span class="c1"># name of the declaring microservice</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">doorman</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:9090</span>
+</code></pre></div></div>
+
+<h2 id="经理-manager">经理 (Manager)</h2>
+<p>为了管理所有人员和设施，<strong>经理</strong>作为用户唯一接口人，主要功能有：</p>
+
+<ul>
+  <li>
+    <p>联系<strong>门卫</strong>认证用户，保护<strong>技工</strong>和<strong>养蜂人</strong>，以免非法用户骗取服务并逃避服务费用</p>
+  </li>
+  <li>
+    <p>联系能力相符的<strong>技工</strong>和<strong>养蜂人</strong>，平衡工作量，避免单个人员工作超载</p>
+  </li>
+  <li>
+    <p>管理<strong>项目归档</strong>，避免重复工作，保证公司收益最大化</p>
+  </li>
+</ul>
+
+<p>由于<strong>经理</strong>责任重大，我们选取了业界有名的<a href="https://github.com/Netflix/zuul">Netflix Zuul</a>作为候选人并加以培训，
+提升其能力，以保证其能胜任该职位。</p>
+
+<p>首先我们引入依赖：</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="用户认证服务">用户认证服务</h3>
+<p>当用户发送非登录请求时，我们首先需要验证用户合法，在如下服务中，我们通过<strong>告示栏</strong>获取<strong>门卫</strong>联系方式，
+然后发送用户token给<strong>门卫</strong>进行认证。</p>
+
+<p><code class="highlighter-rouge">ServiceComb</code> 提供了相应 <code class="highlighter-rouge">RestTemplate</code> 实现查询<a href="https://github.com/apache/incubator-servicecomb-service-center">Service Center</a>
+中的服务注册信息，只需在地址中以如下格式包含被调用的服务名</p>
+
+<div class="language-html highlighter-rouge"><div class="highlight"><pre class="highlight"><code>cse://doorman/path/to/rest/endpoint
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">ServiceComb</code> 将自动查询对应服务并发送请求到地址中的服务端点。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Service</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">AuthenticationService</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">AuthenticationService</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">DOORMAN_ADDRESS</span> <span class="o">=</span> <span class="s">"cse://doorman"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">RestTemplate</span> <span class="n">restTemplate</span><span class="o">;</span>
+
+  <span class="nc">AuthenticationService</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">restTemplate</span> <span class="o">=</span> <span class="nc">RestTemplateBuilder</span><span class="o">.</span><span class="na">create</span><span class="o">();</span>
+
+    <span class="k">this</span><span class="o">.</span><span class="na">restTemplate</span><span class="o">.</span><span class="na">setErrorHandler</span><span class="o">(</span><span class="k">new</span> <span class="nc">ResponseErrorHandler</span><span class="o">()</span> <span class="o">{</span>
+      <span class="nd">@Override</span>
+      <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">hasError</span><span class="o">(</span><span class="nc">ClientHttpResponse</span> <span class="n">clientHttpResponse</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
+        <span class="k">return</span> <span class="kc">false</span><span class="o">;</span>
+      <span class="o">}</span>
+
+      <span class="nd">@Override</span>
+      <span class="kd">public</span> <span class="kt">void</span> <span class="nf">handleError</span><span class="o">(</span><span class="nc">ClientHttpResponse</span> <span class="n">clientHttpResponse</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">IOException</span> <span class="o">{</span>
+      <span class="o">}</span>
+    <span class="o">});</span>
+  <span class="o">}</span>
+
+  <span class="nd">@HystrixCommand</span><span class="o">(</span><span class="n">fallbackMethod</span> <span class="o">=</span> <span class="s">"timeout"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="nf">validate</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Validating token {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="n">responseEntity</span> <span class="o">=</span> <span class="n">restTemplate</span><span class="o">.</span><span class="na">postForEntity</span><span class="o">(</span>
+        <span class="no">DOORMAN_ADDRESS</span> <span class="o">+</span> <span class="s">"/rest/validate"</span><span class="o">,</span>
+        <span class="n">validationRequest</span><span class="o">(</span><span class="n">token</span><span class="o">),</span>
+        <span class="nc">String</span><span class="o">.</span><span class="na">class</span>
+    <span class="o">);</span>
+
+    <span class="k">if</span> <span class="o">(!</span><span class="n">responseEntity</span><span class="o">.</span><span class="na">getStatusCode</span><span class="o">().</span><span class="na">is2xxSuccessful</span><span class="o">())</span> <span class="o">{</span>
+      <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"No such user found with token {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Validated request of token {} to be user {}"</span><span class="o">,</span> <span class="n">token</span><span class="o">,</span> <span class="n">responseEntity</span><span class="o">.</span><span class="na">getBody</span><span class="o">());</span>
+    <span class="k">return</span> <span class="n">responseEntity</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="nf">timeout</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"Request to validate token {} timed out"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">ResponseEntity</span><span class="o">&lt;&gt;(</span><span class="no">REQUEST_TIMEOUT</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">HttpEntity</span><span class="o">&lt;</span><span class="nc">Token</span><span class="o">&gt;</span> <span class="nf">validationRequest</span><span class="o">(</span><span class="nc">String</span> <span class="n">token</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">HttpHeaders</span> <span class="n">headers</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HttpHeaders</span><span class="o">();</span>
+    <span class="n">headers</span><span class="o">.</span><span class="na">setContentType</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON_UTF8</span><span class="o">);</span>
+
+    <span class="k">return</span> <span class="k">new</span> <span class="nc">HttpEntity</span><span class="o">&lt;&gt;(</span><span class="k">new</span> <span class="nc">Token</span><span class="o">(</span><span class="n">token</span><span class="o">),</span> <span class="n">headers</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="请求过滤">请求过滤</h3>
+<p>接下来我们提供 <code class="highlighter-rouge">ZuulFilter</code> 实现过滤用户请求，调用 <code class="highlighter-rouge">authenticationService.validate(token)</code> 认证用户token。
+若用户合法则路由用户请求到对应服务，否则返回 <code class="highlighter-rouge">403 forbidden</code>。</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Component</span>
+<span class="kd">class</span> <span class="nc">AuthenticationAwareFilter</span> <span class="kd">extends</span> <span class="nc">ZuulFilter</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">AuthenticationAwareFilter</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">String</span> <span class="no">LOGIN_PATH</span> <span class="o">=</span> <span class="s">"/login"</span><span class="o">;</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">PathExtractor</span> <span class="n">pathExtractor</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">AuthenticationAwareFilter</span><span class="o">(</span>
+      <span class="nc">AuthenticationService</span> <span class="n">authenticationService</span><span class="o">,</span>
+      <span class="nc">PathExtractor</span> <span class="n">pathExtractor</span><span class="o">)</span> <span class="o">{</span>
+
+    <span class="k">this</span><span class="o">.</span><span class="na">authenticationService</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">;</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">pathExtractor</span> <span class="o">=</span> <span class="n">pathExtractor</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">filterType</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="s">"pre"</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">int</span> <span class="nf">filterOrder</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="mi">1</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">shouldFilter</span><span class="o">()</span> <span class="o">{</span>
+    <span class="nc">String</span> <span class="n">path</span> <span class="o">=</span> <span class="n">pathExtractor</span><span class="o">.</span><span class="na">path</span><span class="o">(</span><span class="nc">RequestContext</span><span class="o">.</span><span class="na">getCurrentContext</span><span class="o">());</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Received request with query path: {}"</span><span class="o">,</span> <span class="n">path</span><span class="o">);</span>
+    <span class="k">return</span> <span class="o">!</span><span class="n">path</span><span class="o">.</span><span class="na">endsWith</span><span class="o">(</span><span class="no">LOGIN_PATH</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">Object</span> <span class="nf">run</span><span class="o">()</span> <span class="o">{</span>
+    <span class="n">filter</span><span class="o">();</span>
+    <span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">filter</span><span class="o">()</span> <span class="o">{</span>
+    <span class="nc">RequestContext</span> <span class="n">context</span> <span class="o">=</span> <span class="nc">RequestContext</span><span class="o">.</span><span class="na">getCurrentContext</span><span class="o">();</span>
+
+    <span class="k">if</span> <span class="o">(</span><span class="n">doesNotContainToken</span><span class="o">(</span><span class="n">context</span><span class="o">))</span> <span class="o">{</span>
+      <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"No token found in request header"</span><span class="o">);</span>
+      <span class="n">rejectRequest</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
+    <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+      <span class="nc">String</span> <span class="n">token</span> <span class="o">=</span> <span class="n">token</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
+      <span class="nc">ResponseEntity</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">&gt;</span> <span class="n">responseEntity</span> <span class="o">=</span> <span class="n">authenticationService</span><span class="o">.</span><span class="na">validate</span><span class="o">(</span><span class="n">token</span><span class="o">);</span>
+      <span class="k">if</span> <span class="o">(!</span><span class="n">responseEntity</span><span class="o">.</span><span class="na">getStatusCode</span><span class="o">().</span><span class="na">is2xxSuccessful</span><span class="o">())</span> <span class="o">{</span>
+        <span class="n">logger</span><span class="o">.</span><span class="na">warn</span><span class="o">(</span><span class="s">"Unauthorized token {} and request rejected"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+        <span class="n">rejectRequest</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
+      <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+        <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Token {} validated"</span><span class="o">,</span> <span class="n">token</span><span class="o">);</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">void</span> <span class="nf">rejectRequest</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="n">context</span><span class="o">.</span><span class="na">setResponseStatusCode</span><span class="o">(</span><span class="no">SC_FORBIDDEN</span><span class="o">);</span>
+    <span class="n">context</span><span class="o">.</span><span class="na">setSendZuulResponse</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="kt">boolean</span> <span class="nf">doesNotContainToken</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nf">authorizationHeader</span><span class="o">(</span><span class="n">context</span><span class="o">)</span> <span class="o">==</span> <span class="kc">null</span>
+        <span class="o">||</span> <span class="o">!</span><span class="n">authorizationHeader</span><span class="o">(</span><span class="n">context</span><span class="o">).</span><span class="na">startsWith</span><span class="o">(</span><span class="no">TOKEN_PREFIX</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">String</span> <span class="nf">token</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nf">authorizationHeader</span><span class="o">(</span><span class="n">context</span><span class="o">).</span><span class="na">replace</span><span class="o">(</span><span class="no">TOKEN_PREFIX</span><span class="o">,</span> <span class="s">""</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">private</span> <span class="nc">String</span> <span class="nf">authorizationHeader</span><span class="o">(</span><span class="nc">RequestContext</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">context</span><span class="o">.</span><span class="na">getRequest</span><span class="o">().</span><span class="na">getHeader</span><span class="o">(</span><span class="no">AUTHORIZATION</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>最后提供服务应用入口：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableCircuitBreaker</span>
+<span class="nd">@EnableZuulProxy</span>
+<span class="nd">@EnableDiscoveryClient</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">ManagerApplication</span> <span class="o">{</span>
+
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ManagerApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">application.yaml</code> 中定义路由规则：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">zuul</span><span class="pi">:</span>
+  <span class="na">routes</span><span class="pi">:</span>
+    <span class="na">doorman</span><span class="pi">:</span>
+      <span class="na">serviceId</span><span class="pi">:</span> <span class="s">doorman</span>
+      <span class="na">sensitiveHeaders</span><span class="pi">:</span>
+    <span class="na">worker</span><span class="pi">:</span>
+      <span class="na">serviceId</span><span class="pi">:</span> <span class="s">worker</span>
+    <span class="na">beekeeper</span><span class="pi">:</span>
+      <span class="na">serviceId</span><span class="pi">:</span> <span class="s">beekeeper</span>
+
+<span class="c1"># disable netflix eurkea since it's not used for service discovery</span>
+<span class="na">ribbon</span><span class="pi">:</span>
+  <span class="na">eureka</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">false</span>
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">microservice.yaml</code> 中定义服务中心地址：</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">company</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">manager</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span>
+</code></pre></div></div>
+
+<h2 id="项目归档-project-archive">项目归档 (Project Archive)</h2>
+<p><strong>经理</strong>在每次用户请求后将项目进行归档，如果将来有内容相同的请求到达，<strong>经理</strong>可以就近获取结果，不必再购买
+<strong>技工</strong>和<strong>养蜂人</strong>提供的计算服务，节省公司开支。</p>
+
+<p>对于归档功能的实现，我们采用了<strong>Spring Cache Abstraction</strong>，具体细节超出了这篇文章的范围，大家如果有兴趣可以
+查看github上<a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">workshop</a>的 <code class="highlighter-rouge">manager</code> 模块代码。</p>
+
+<h2 id="人力资源-human-resource">人力资源 (Human Resource)</h2>
+
+<p><strong>人力资源</strong>从运维层面保证服务的可靠性，主要功能有</p>
+
+<ul>
+  <li>
+    <p>弹性伸缩，以保证用户请求量超过<strong>技工</strong>或<strong>养蜂人</strong>处理能力后，招聘更多<strong>技工</strong>或<strong>养蜂人</strong>加入项目；当请求量回落后，裁剪<strong>技工</strong>或<strong>养蜂人</strong>以节省公司开支</p>
+  </li>
+  <li>
+    <p>健康检查，以保证<strong>技工</strong>或<strong>养蜂人</strong>告病时，能有替补接手任务</p>
+  </li>
+  <li>
+    <p>滚动升级，以保证项目需要新技能时，能替换、培训<strong>技工</strong>或<strong>养蜂人</strong>，不中断接收用户请求</p>
+  </li>
+</ul>
+
+<p><strong>人力资源</strong>的功能需要云平台提供支持，在后续的文章中会跟大家介绍，我们如何在华为云上轻松实现这些功能。</p>
+
+<h2 id="总结">总结</h2>
+<p>在这篇文章中，我们用一个公司的组织结构作为例子，给大家介绍了微服务的完整架构，以及如何使用微服务框架 <code class="highlighter-rouge">ServiceComb</code>
+快速开发微服务，以及服务间互通、契约认证。</p>
+
+<p><a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">Workshop demo</a>项目也包含大量完整易懂的测试
+代码，以及使用docker集成微服务，模拟生存环境，同时应用<a href="https://travis-ci.org/">Travis</a>搭建持续集成环境，体现
+DevOps在微服务开发中的实践。希望能对大家有所帮助。</p>
+
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content/docs/mesher-quick-start-advance/mesher-distributed-tracing/index.html

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+    
+      <li>
+        
+          <span class="nav__sub-title">Use mesher to merge into the servicecomb microservice system</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start/" class="">Get started</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/" class="">mesher Advance</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/mesher-load-balance/" class="">mesher balance</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/mesher-flow-control/" class="">mesher Flow Control</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/mesher-service-management/" class="">mesher Service Management</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/mesher-distributed-tracing/" class="active">mesher Distributed Tracing</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">A contract-based microservice development toolkit</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/toolkit/quick-start/" class="">Quick Start</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/toolkit/oas-validator/" class="">OpenAPI V3 Spec validation tools</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">A multiple servicecenters synchronization tool</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/syncer/quick-start/" class="">Quick Start</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/syncer/multi-servicecenters/" class="">Different service centers communicate with each other</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="mesher Distributed Tracing">
+    <meta itemprop="description" content="Introduce how to use distributed tracing with mesher">
+    
+    <meta itemprop="dateModified" content="August 08, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">mesher Distributed Tracing
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>Distributed handler chain tracking provides the ability of tracing microservice call relationships and watching processing time. It is used to make it easy for users to check the health of microservices in a distributed environment. This guide will show you how to use the distributed handler chain tracking capabilities provided by <strong>mesher</strong>.</li>
+</ul>
+
+<h1 id="foreword">Foreword</h1>
+
+<ul>
+  <li>Walk through <a href="/docs/mesher-quick-start/">mesher-quick-start</a> and have <strong>mesher display programs</strong> running.</li>
+</ul>
+
+<h1 id="enable">Enable</h1>
+
+<ul>
+  <li>
+    <p>1 Added zipkin library dependency in mesher main file.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>_ <span class="s2">"github.com/go-chassis/go-chassis-plugins/tracing/zipkin"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>2 Add default handlers in bootstrap.go as shown by the arrows in the figure.</p>
+
+    <p><img src="/assets/images/mesher/mesher-tracing-func.png" alt="tracing-func" /></p>
+  </li>
+  <li>
+    <p>3 Recompile and replace the executable file of <strong>mesher_webapp</strong> and <strong>mesher_calculator</strong>. Then start the mesher service respectively.</p>
+  </li>
+  <li>
+    <p>4 Running Zipkin Distributed tracking service with docker.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 9411:9411 openzipkin/zipkin
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>5 Click on the <em>Submit</em> button to initiate http call.</p>
+  </li>
+  <li>
+    <p>6 Open <a href="http://192.168.88.64:9411">http://192.168.88.64:9411</a> to view the distributed tracking results. You can see the call chains and processing time of http call.</p>
+
+    <p><img src="/assets/images/mesher/mesher-tracing-30111.png" alt="Distributed tracking rendering 30111" /></p>
+  </li>
+</ul>
+
+<h1 id="whats-next">What’s next</h1>
+
+<ul>
+  <li>
+    <p>Learn more about <a href="/users/distributed-tracing/">Distributed Tracing</a></p>
+  </li>
+  <li>
+    <p>Read <a href="/docs/tracing-with-servicecomb/">Distributed Tracing with ServiceComb and Zipkin</a></p>
+  </li>
+  <li>
+    <p>See <a href="/users/">ServiceComb User Guide</a></p>
+  </li>
+  <li>
+    <p>Learn more from <a href="/docs/linuxcon-workshop-demo/">the Company application</a> for a more complete example of microservice applications integrated with ServiceComb</p>
+
+    <p>``</p>
+  </li>
+</ul>
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content/docs/mesher-quick-start-advance/mesher-flow-control/index.html

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+          
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+          
+            
+            
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+          
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+          
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+        
+          <span class="nav__sub-title">Use mesher to merge into the servicecomb microservice system</span>
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+          
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+        <ul>
+  <li>Flow control avoids microservice overload operations by controlling the data transfer rate. This guide will show you how to use the flow control capabilities provided by <strong>mesher</strong></li>
+</ul>
+
+<h1 id="before-you-start">Before you start</h1>
+
+<ul>
+  <li>Walk through <a href="/docs/mesher-quick-start/">mesher-quick-start</a> and have <strong>mesher display programs</strong> running.</li>
+</ul>
+
+<h1 id="enable">Enable</h1>
+
+<ul>
+  <li>
+    <p>Change the configuration file <strong>chassis.yaml</strong> of <strong>mesher_calculator</strong>. Add a flow control configuration in <strong>chassis.yaml</strong> as follows. Restart the service.</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">flowcontrol</span><span class="pi">:</span>
+ <span class="na">Provider</span><span class="pi">:</span>
+   <span class="na">qps</span><span class="pi">:</span>
+     <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>                 <span class="c1"># enable rate limiting or not</span>
+     <span class="na">global</span><span class="pi">:</span>
+       <span class="na">limit</span><span class="pi">:</span> <span class="m">0</span>                    <span class="c1"># default limit of provider</span>
+     <span class="na">limit</span><span class="pi">:</span>
+       <span class="na">Server</span><span class="pi">:</span> <span class="m">0</span>                  <span class="c1"># rate limit for request from a provider</span>
+</code></pre></div>    </div>
+
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+
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+
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+
+<h1 id="whats-next">What’s next</h1>
+
+<ul>
+  <li>
+    <p>See quick start for <a href="/docs/mesher-quick-start-advance/mesher-service-management/">Service Management</a></p>
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content/docs/mesher-quick-start-advance/mesher-load-balance/index.html

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+    
+    <meta itemprop="dateModified" content="August 08, 2019">
+
+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">mesher Load Balance
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>mesher supports flexible load balancing algorithms. This guide will show you how to use the load balancing capabilities provided by <strong>mesher</strong>.</li>
+</ul>
+
+<h1 id="foreword">Foreword</h1>
+
+<ul>
+  <li>Walk through <a href="/docs/mesher-quick-start/">mesher-quick-start</a> and have <strong>mesher display programs</strong> running.</li>
+</ul>
+
+<h1 id="enable">Enable</h1>
+
+<ul>
+  <li>
+    <p>You can start a new <strong>mesher_calculator</strong> and <strong>httpserver_calculator</strong> instance for load balancing testing by using the program in example directory <a href="https://github.com/apache/servicecomb-mesher/tree/master/examples/quick_start/test_balance">test_balance</a></p>
+  </li>
+  <li>
+    <p>1 Change the <strong>service name</strong> in file <strong>microservice.yaml</strong> to <strong>calculator</strong>. Change the listening address and port in file <strong>chassis.yaml</strong> to avoid conflicts.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:40102
+listenAddress: 127.0.0.1:30101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30108
+listenAddress: 127.0.0.1:30102  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30109
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>2 Start running mesher_calculator by cmd:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">export </span><span class="nv">SPECIFIC_ADDR</span><span class="o">=</span>127.0.0.1:4537
+./mesher
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>3 The <strong>Roundbin</strong> load balancing algorithm is used by default and the Random, SessionStickiness load balancing algorithms are also supported. We configure the load balancing method <strong>Random</strong> by modifing configuration file chassis.yaml of <strong>mesher_webapp</strong>.</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">loadbalance</span><span class="pi">:</span>
+  <span class="na">strategy</span><span class="pi">:</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">Random</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>4 Run a new services instance of <strong>httpserver_calculator</strong> which is listenning on port 4537.</p>
+  </li>
+</ul>
+
+<h1 id="verification">Verification</h1>
+
+<ul>
+  <li>
+    <p>Multiple clicks the <em>Submit</em> button and we can see that the BMI Instance ID in the following two interfaces appear randomly.</p>
+
+    <p><img src="/assets/images/mesher/mesher-testpythonhttp.png" alt="mesher-test-httppy1" /><br /></p>
+
+    <p><img src="/assets/images/mesher/mesher-testpythonhttp2.png" alt="mesher-test-httppy2" /></p>
+  </li>
+</ul>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>See quick start for <a href="/docs/mesher-quick-start-advance/mesher-flow-control/">Flow Control</a></p>
+  </li>
+  <li>
+    <p>Learn more about <a href="/users/service-configurations/#负载均衡策略">Load Balance</a></p>
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+    
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+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">mesher Service Management
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ul>
+  <li>Service management is mainly used to effectively control and manage a large number of microservices in distributed systems. This guide will show you how to use the service management capabilities provided by <strong>mesher</strong>.</li>
+</ul>
+
+<h1 id="before-you-start">Before you start</h1>
+
+<ul>
+  <li>Walk through <a href="/docs/mesher-quick-start/">mesher-quick-start</a>, <a href="/docs/quick-start-advance/load-balance/">mesher-load-balance</a> and have <strong>mesher display programs</strong> running.</li>
+</ul>
+
+<h1 id="grayscale-release">Grayscale release</h1>
+
+<h2 id="configuration">Configuration</h2>
+
+<ul>
+  <li>
+    <p>1 Change the version number to <strong>1.1.1</strong> and <strong>1.1.2</strong> respectively in conf <strong>microservice.yaml</strong> of two <strong>mesher_calculator</strong> instances. Restart the mesher service and you can see that the service version number has changed in <strong>servicecenter</strong>.</p>
+
+    <p><img src="/assets/images/mesher/mesher-ser-manage-ver.png" alt="mesher-ser-manage-ver" /></p>
+  </li>
+  <li>
+    <p>2 Change weight options in configuration file router.yaml of mesher_webapp. Then restart service.</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">routeRule</span><span class="pi">:</span>
+  <span class="na">calculator</span><span class="pi">:</span>        <span class="c1">#service name</span>
+    <span class="pi">-</span> <span class="na">precedence</span><span class="pi">:</span> <span class="m">2</span>    <span class="c1">#precedence of route rule</span>
+      <span class="na">route</span><span class="pi">:</span>           <span class="c1">#route rule list</span>
+      <span class="pi">-</span> <span class="na">tags</span><span class="pi">:</span>
+          <span class="na">version</span><span class="pi">:</span> <span class="s">1.1.1</span>
+        <span class="na">weight</span><span class="pi">:</span> <span class="m">70</span>     <span class="c1">#weight of 20%</span>
+      <span class="pi">-</span> <span class="na">tags</span><span class="pi">:</span>
+          <span class="na">version</span><span class="pi">:</span> <span class="s">1.1.2</span>
+        <span class="na">weight</span><span class="pi">:</span> <span class="m">30</span>     <span class="c1">#weight of 20%</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="verification">Verification</h2>
+
+<ul>
+  <li>Click the <em>Submit</em> button repeatedly and you can see that the BMI Instance ID keep changing according to the weight configuration.</li>
+</ul>
+
+<h1 id="circuit-breaker">Circuit breaker</h1>
+
+<h2 id="configuration-1">Configuration</h2>
+
+<ul>
+  <li>
+    <p>1 Change the circuit breaker configuration in conf chassis.yaml of mesher_webapp.</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">isolation</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">timeout</span><span class="pi">:</span>
+      <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+    <span class="na">timeoutInMilliseconds</span><span class="pi">:</span> <span class="s">1000</span>            
+    <span class="na">maxConcurrentRequests</span><span class="pi">:</span> <span class="m">1</span>
+<span class="na">circuitBreaker</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+    <span class="na">forceOpen</span><span class="pi">:</span> <span class="no">false</span>
+    <span class="na">forceClosed</span><span class="pi">:</span> <span class="no">false</span>
+    <span class="na">sleepWindowInMilliseconds</span><span class="pi">:</span> <span class="s">10000</span>    
+    <span class="na">requestVolumeThreshold</span><span class="pi">:</span> <span class="s">1</span>          
+    <span class="na">errorThresholdPercentage</span><span class="pi">:</span> <span class="m">1</span>
+<span class="na">fallback</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+    <span class="na">maxConcurrentRequests</span><span class="pi">:</span> <span class="m">1</span>
+<span class="na">fallbackpolicy</span><span class="pi">:</span>
+  <span class="na">Consumer</span><span class="pi">:</span>
+    <span class="na">policy</span><span class="pi">:</span> <span class="s">returnnull</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>2 Stop the service instances in directory test_balance.</p>
+  </li>
+</ul>
+
+<h2 id="verification-1">Verification</h2>
+
+<ul>
+  <li>
+    <p>1 The circuit breaker of mesher_webapp takes effect when a negative parameter is passed in. The first picture is the log of <strong>mesher_webapp</strong>. The second picture is the return value when inputing negative parameter. The third picture is the return value when the circuit breaker of mesher_webapp takes effect.</p>
+
+    <p><img src="/assets/images/mesher/mesher-circuitbreaker.png" alt="mesher-circuitbreaker" /></p>
+
+    <p><img src="/assets/images/mesher/mesher-circuitbreaker-ret.png" alt="mesher-circuitbreaker-ret" /></p>
+
+    <p><img src="/assets/images/mesher/mesher-circuitbreaker-ret-nil.png" alt="mesher-circuitbreaker-ret-nil" /></p>
+  </li>
+  <li>
+    <p>2 The service is automatically restored after 10 seconds because of the conf parameter <strong>sleepWindowInMilliseconds</strong>.</p>
+  </li>
+</ul>
+
+<h1 id="whats-next">What’s next</h1>
+
+<ul>
+  <li>
+    <p>Read <a href="/docs/mesher-quick-start-advance/mesher-distributed-tracing/">mesher distributed tracing</a></p>
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+        
+          <header>
+            <h1 class="page__title" itemprop="headline">mesher Get started
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h1 id="install-development-environment">Install development environment</h1>
+
+<ul>
+  <li>
+    <p>Install <strong>git</strong>. Get details <a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git" target="_blank">git Installation tutorial</a>.</p>
+  </li>
+  <li>
+    <p>Install <strong>golang 1.12.7</strong>. Get details <a href="https://golang.google.cn/doc/install" target="_blank">Go Installation tutorial</a>.</p>
+  </li>
+  <li>
+    <p>Install <strong>python 2.7</strong>. Get details <a href="https://wiki.python.org/moin/BeginnersGuide/Download" target="_blank">python Installation tutorial</a>.</p>
+  </li>
+  <li>
+    <p>Install <strong>nodejs v10.16.2</strong>. Get details <a href="https://nodejs.org/en/download/" target="_blank">nodejs download</a>。</p>
+  </li>
+</ul>
+
+<h1 id="run-service-center">Run Service Center</h1>
+
+<p>In the <strong>ServiceComb</strong> microservices framework, <strong>Service Center</strong> provides service registration and service discovery.</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest
+</code></pre></div></div>
+
+<p><em>Reference to <a href="/users/setup-environment/#运行service-center">service center deployment</a> to learn deploying Service Center and front as a local binary.</em></p>
+
+<h1 id="use-mesher-to-merge-into-the-servicecomb-microservice-system">Use mesher to merge into the servicecomb microservice system</h1>
+
+<h2 id="background">Background</h2>
+
+<ul>
+  <li>This use case is mainly to help users get started quickly with <strong>mesher sidecar</strong> mode. We hope that users can understand the working mode of mesher and learn how to merge the existing http service into the ServiceComb micro-service system with mesher. The final goal is to help user get the micro-service capabilities such as load balancing, flow control, service management and call chain tracing provided by servicecomb. The full case will be submitted to <a href="https://github.com/apache/servicecomb-mesher/tree/master/examples/quick_start">Case Download</a>.</li>
+</ul>
+
+<h2 id="mesher-use-case-service-introduction">mesher use case service introduction</h2>
+
+<ul>
+  <li>1 <strong>httpserver_calculator</strong>. A http server based on python which is for BMI calculator and can be developed by any language.</li>
+  <li>2 <strong>httpserver_webapp</strong>. A http server based on nodejs which is used for displaying results on the browser.</li>
+  <li>3 <strong>mesher_webapp</strong>. A mesher instance which serves for httpserver_webapp via sidecar mode.</li>
+  <li>4 <strong>mesher_calculator</strong>. A mesher instance which serves for httpserver_calculator via sidecar mode.</li>
+  <li>5 <strong>servicecenter</strong>. Servicecenter which receives registration of mesher service and provides services as service discovery, routing query, service monitoring and so on.</li>
+</ul>
+
+<p><img src="/assets/images/mesher/mesher-deployment-simple.png" alt="mesher deployment diagram" /></p>
+
+<h2 id="process-details">Process details</h2>
+
+<ul>
+  <li>1 The browser[192.168.88.78] execute a http call to the <strong>httpserver_webapp</strong> service with url <a href=""></a><a href="http://192.168.88.64:4597/calculator/bmi">http://192.168.88.64:4597/calculator/bmi</a>.</li>
+  <li>2 The httpserver_webapp service receives the request and execute http call <a href=""></a><a href="http://calculator/bmi">http://calculator/bmi</a>. Because the proxy is set as <a href=""></a><a href="http://127.0.0.1:30101">http://127.0.0.1:30101</a>, the request initiated by <strong>httpserver_webapp</strong> will be forwarded to the <strong>mesher_webapp</strong> service.</li>
+  <li>3 <strong>mesher_webapp</strong> gets the address of the service name(the service name <strong>calculator</strong> here is configured in microservice.yaml) from the <strong>servicecenter</strong> and forwarded to <strong>mesher_calculator</strong>.</li>
+  <li>4 <strong>mesher_calculator</strong> service forward http requests to the <strong>httpserver_calculator</strong> service.</li>
+  <li>
+    <p>5 <strong>httpserver_calculator</strong> will calculate according to the input parameters(height and weight). The result containing service id and body mass index will be displayed on the browser. The flow chart is as follows:</p>
+
+    <p><img src="/assets/images/mesher/mesher-flowchart-simple.png" alt="mesher-flow-chart" /></p>
+  </li>
+</ul>
+
+<h2 id="environmental-construction">Environmental construction</h2>
+
+<ul>
+  <li>
+    <p>1 Compile <strong>mesher</strong> <a href="https://github.com/apache/servicecomb-mesher">download</a>. Download the project and get the executable mesher(linux) or mesher.exe(windows) by README.md.</p>
+  </li>
+  <li>
+    <p>2 Create <strong>mesher_webapp</strong> which serves for <strong>httpserver_webapp</strong>. In the mesher directory execute the following linux command to create mesher_webapp. In order to the run mesher you also need to copy the conf.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">mkdir</span> /usr/local/src/mesher_webapp
+<span class="nb">cp</span> ./mesher /usr/local/src/mesher_webapp
+<span class="nb">cp</span> <span class="nt">-r</span> ./conf /usr/local/src/mesher_webapp
+</code></pre></div>    </div>
+
+    <p>Change <strong>service name</strong> in microservice.yaml from hellemesher to <strong>webapp</strong>. Change the listening service address in chassis.yaml from 127.0.0.1 to <strong>intranet ip</strong>(Viewed by cmd ifconfig in linux, such as 192.168.88.64).</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:40101
+listenAddress: 127.0.0.1:30101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30101
+listenAddress: 127.0.0.1:30102  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30102
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>3 Create mesher_calculator service.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">mkdir</span> /usr/local/src/mesher_calculator
+<span class="nb">cp</span> ./mesher /usr/local/src/mesher_calculator
+<span class="nb">cp</span> <span class="nt">-r</span> ./conf /usr/local/src/mesher_calculator
+</code></pre></div>    </div>
+
+    <p>Change the <strong>service name</strong> in conf file <strong>microservice.yaml</strong> from hellemesher to <strong>calculator</strong>.<br />
+Change the listening address and port in conf file <strong>chassis.yaml</strong>.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:40107
+listenAddress: 127.0.0.1:30101  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30111
+listenAddress: 127.0.0.1:30102  <span class="nt">-----</span>》  listenAddress: 192.168.88.64:30112
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>4 Run mesher_webapp and mesher_calculator respectively by cmd.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/mesher_calculator
+<span class="nb">export </span><span class="nv">SPECIFIC_ADDR</span><span class="o">=</span>127.0.0.1:4540
+./mesher
+</code></pre></div>    </div>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/mesher_webapp
+./mesher
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>5 Run <strong>httpserver_webapp</strong>.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/httpserver_webapp
+npm <span class="nb">install
+export </span><span class="nv">http_proxy</span><span class="o">=</span>http://127.0.0.1:30101
+node ./httpserver_webapp.js
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>6 Run <strong>httpserver_calculator</strong> program as BMI calculator. You need to install python2.7 and this service relies on package BaseHTTPServer.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/httpserver_calculator
+./httpserver_calculator.py
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="start-testing">Start testing</h2>
+
+<ul>
+  <li>
+    <p>1 Open url <a href="http://192.168.88.64:30103">http://192.168.88.64:30103</a> in browser(You need to start the front service of the service-center. Referring <a href="http://servicecomb.apache.org/users/setup-environment/#%E8%BF%90%E8%A1%8Cservice-center">http://servicecomb.apache.org/users/setup-environment/#%E8%BF%90%E8%A1%8Cservice-center</a>). You can see services information in web. The name <strong>webapp</strong> represents the <strong>mesher_webapp</strong> which is the service name configured in microservice.yaml. The name <strong>calculator</strong> represents the <strong>mesher_calculator</strong> which is the service name configured in microservice.yaml. <strong>SERVICECENTER</strong> represents the <strong>servicecenter</strong>.</p>
+
+    <p><img src="/assets/images/mesher/mesher-servercenter.png" alt="Service-center-monitoring" /></p>
+  </li>
+  <li>
+    <p>2 Open <a href="http://192.168.88.64:4597">http://192.168.88.64:4597</a> in browser and you can see the following interface.</p>
+
+    <p><img src="/assets/images/mesher/mesher-testinit.png" alt="mesher_calculatormi-test" /></p>
+  </li>
+  <li>
+    <p>3 Enter the parameters (180, 70) and click submit.</p>
+
+    <p><img src="/assets/images/mesher/mesher-testpythonhttp.png" alt="mesher-testhttp" /></p>
+  </li>
+</ul>
+
+<h1 id="whats-next">What’s next</h1>
+
+<ul>
+  <li>Read <a href="/docs/mesher-quick-start-advance/">mesher quick start advance</a></li>
+</ul>
+
+        
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+
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+    <div class="col">
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+        <p class="header">ASF</p>
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+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
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+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_docs/mersher-quick-start.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
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content/docs/mesher/1.6.3/README.html

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+           <div itemprop="articleBody">
+            
+  <div class="section" id="how-to-write-doc-in-local">
+<h1>How to write doc in local<a class="headerlink" href="#how-to-write-doc-in-local" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="prepare">
+<h2>Prepare<a class="headerlink" href="#prepare" title="Permalink to this headline">¶</a></h2>
+<ol class="simple">
+<li><p>Install Python 2.7 with zlib, libssl-dev(openssl-devel)</p></li>
+<li><p>Install pip</p></li>
+<li><p>Install readthe doc support https://docs.readthedocs.io/en/latest/getting_started.html</p></li>
+<li><p>Install RTD module</p></li>
+</ol>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>sudo pip install sphinx_rtd_theme
+</pre></div>
+</div>
+</div>
+<div class="section" id="generate-doc">
+<h2>Generate doc<a class="headerlink" href="#generate-doc" title="Permalink to this headline">¶</a></h2>
+<p>In windows</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span><span class="nb">cd</span> docs
+make.bat html
+</pre></div>
+</div>
+<p>In linux</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span><span class="nb">cd</span> docs
+sphinx-autobuild . _build/html
+</pre></div>
+</div>
+</div>
+<div class="section" id="check-the-result">
+<h2>Check the result<a class="headerlink" href="#check-the-result" title="Permalink to this headline">¶</a></h2>
+<ol class="simple">
+<li><p>See html pages in _build folder</p></li>
+<li><p>Access http://127.0.0.1:8000</p></li>
+</ol>
+</div>
+</div>
+
+
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content/docs/mesher/1.6.3/_images/pod.png

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content/docs/mesher/1.6.3/_sources/README.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/README.md.txt b/content/docs/mesher/1.6.3/_sources/README.md.txt
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+# How to write doc in local
+
+## Prepare
+1. Install Python 2.7 with zlib, libssl-dev(openssl-devel)
+1. Install pip
+1. Install readthe doc support https://docs.readthedocs.io/en/latest/getting_started.html
+1. Install RTD module
+```shell
+sudo pip install sphinx_rtd_theme
+```
+
+## Generate doc
+
+In windows
+```shell
+cd docs
+make.bat html
+```
+
+In linux
+```shell
+cd docs
+sphinx-autobuild . _build/html
+```
+
+## Check the result
+
+1. See html pages in _build folder
+1. Access http://127.0.0.1:8000

content/docs/mesher/1.6.3/_sources/configuration.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configuration.rst.txt b/content/docs/mesher/1.6.3/_sources/configuration.rst.txt
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@@ -0,0 +1,13 @@
+User guides
+=========================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   configurations/cli
+   configurations/profiling
+   configurations/admin
+   configurations/health
+   configurations/destination_resolver
+   configurations/edge

content/docs/mesher/1.6.3/_sources/configurations/admin.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configurations/admin.md.txt b/content/docs/mesher/1.6.3/_sources/configurations/admin.md.txt
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+# Admin API
+
+### Configurations
+
+admin api server leverage protocol server, it listens on isolated port, by default admin is enabled, and default value of goRuntimeMetrics is false.
+
+To start api server, set protocol server config in chassis.yaml
+```yaml
+cse:
+   protocols:
+     rest-admin:
+       listenAddress: 0.0.0.0:30102  # listen addr for adminAPI
+```
+
+tune admin api in mesher.yaml
+```yaml
+admin: 
+  enable: true
+```
+
+
+**admin.enable**
+>*(optional, bool)* default is false
+
+

content/docs/mesher/1.6.3/_sources/configurations/cli.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configurations/cli.md.txt b/content/docs/mesher/1.6.3/_sources/configurations/cli.md.txt
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+# Mesher command Line 
+when you start mesher process, you can use mesher command line to specify configurations like below
+```shell
+mesher --config=mesher.yaml --service-ports=rest:8080
+```
+
+
+### Options
+
+
+**--config**
+>*(optional, string)* the path to mesher configuration file, default value is {current_bin_work_dir}/conf/mesher.yaml
+
+
+**--mode**
+>*(optional, string)* mesher has 2 work mode, sidecar and edge, default is sidecar
+
+
+**--service-ports**
+>*(optional, string)* running as sidecar, mesher need to know local service ports, 
+this is to tell mesher service port list, 
+The value format is {protocol}-{suffix} or {protocol}
+if service has multiple protocol, you can separate with comma "rest-admin:8080,grpc:9000". 
+default is empty, in that case mesher will use header X-Forwarded-Port as local service port, 
+if it is empty also mesher can not communicate to your local service

content/docs/mesher/1.6.3/_sources/configurations/destination_resolver.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configurations/destination_resolver.md.txt b/content/docs/mesher/1.6.3/_sources/configurations/destination_resolver.md.txt
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+# Destination Resolver
+
+Destination Resolver is a module to parse each protocol request to get a target service name. 
+you can write your own resolver implementation for different protocol.
+
+## Configurations
+
+example
+```yaml
+plugin:
+  destinationResolver:
+    http: host # host is a build-in and default resolver, it uses host name as service name
+    grpc: ip
+```
+
+
+
+**plugin.destinationResolver**
+>*(optional, map)* here you can define what kind of resolver, a protocol should use
+

content/docs/mesher/1.6.3/_sources/configurations/edge.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configurations/edge.md.txt b/content/docs/mesher/1.6.3/_sources/configurations/edge.md.txt
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+# API gateway
+mesher is able to work as a API gateway to mange traffic,to run mesher as an API gateway
+```shell
+mesher --config=mesher.yaml --mode edge
+```
+the ingress rule is in mesher.yaml
+
+### Options
+
+**mesher.ingress.type**
+>*(optional, string)* default is servicecomb, it reads servicecomb ingress rule. 
+>it is a plugin, you can custom your own implementation
+
+
+**mesher.ingress.rule.http**
+>*(optional, string)* rule about how to forward http traffic. it holds a yaml content as rule.
+
+below explain the content, the rule list is like a filter, all the request will go through this rule list until match one rule.
+
+**apiPath**
+>*(required, string)* if request's url match this, it will use this rule
+
+**host**
+>*(optional, string)* if request HOST match this, mesher will use this rule, it can be empty, 
+>if you set both host and apiPath, the request's host and api path must match them at the same time
+>
+**service.name**
+>*(required, string)* target backend service name in registry service(like ServiceComb service center)
+>
+**service.redirectPath**
+>*(optional, string)* by default, mesher use original request's url
+>
+**service.port.value**
+>*(optional, string)* if you use java chassis or go chassis to develop backend service, no need to set it. 
+>but if your backend service use mesher-sidecar, you must give your service port here.
+>
+### example
+```yaml
+mesher:
+  ingress:
+    type: servicecomb
+    rule:
+      http: |
+        - host: example.com
+          apiPath: /some/api
+          service:
+            name: example
+            redirectPath: /another/api
+            port:
+              name: http-legacy
+              value: 8080
+        - apiPath: /some/api
+          service:
+            name: Server
+            port:
+              name: http
+              value: 8080
+```
+
+
+### Enable TLS
+generate private key
+```sh
+openssl genrsa -out server.key 2048
+```
+sign cert with private key
+```shell script
+openssl req -new -x509 -key server.key -out server.crt -days 3650
+```
+set file path in chassis.yaml
+```yaml
+ssl:
+  mesher-edge.rest.Provider.certFile: server.crt
+  mesher-edge.rest.Provider.keyFile: server.key
+```
+
+To know advanced feature about TLS configuration, check 
+https://docs.go-chassis.com/user-guides/tls.html
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/configurations/health.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configurations/health.md.txt b/content/docs/mesher/1.6.3/_sources/configurations/health.md.txt
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+# Local Health check
+you can use health checker to check local service health,
+when service instance is not healthy, mesher will update the instance status in registry service to "DOWN" 
+so that other service
+can not discover this instance. If the service is healthy again, mesher will update status to "UP", 
+then other instance can discover it again. 
+currently this function works only when you use service center as registry
+
+examples:
+
+Check local http service
+```yaml
+localHealthCheck:
+  - port: 8080
+    protocol: rest
+    uri: /health
+    interval: 30s
+    match:
+      status: 200
+      body: ok
+```
+
+### Options
+
+
+**port**
+>*(require, string)* must be a port number, mesher is only responsible to check local service, 
+it use 127.0.0.1:{port} to check service
+
+**protocol**
+>*(optional, string)* mesher has a built-in checker "rest",for other protocol, 
+will use default TCP checker unless you implement your own checker
+
+**uri**
+>*(optional, string)* uri start with /.
+
+
+**interval**
+>*(optional, string)* check interval, you can use number with unit: 1m, 10s. 
+
+**match.status**
+>*(optional, string)* the http response status must match status code
+
+**match.body**
+>*(optional, string)* the http response body must match body
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/configurations/profiling.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/configurations/profiling.md.txt b/content/docs/mesher/1.6.3/_sources/configurations/profiling.md.txt
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+# Profile Mesher
+
+Mesher has a convenience way to enable go pprof, so that you can easily analyze the performance of mesher
+
+## Configurations
+
+```yaml
+pprof:
+  enable: true
+  listen: 127.0.0.0.1:6060
+```
+
+
+
+**enable**
+>*(optional, bool)* default is false
+
+
+**listen**
+>*(optional, string)* Listen IP and port
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/development.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/development.rst.txt b/content/docs/mesher/1.6.3/_sources/development.rst.txt
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@@ -0,0 +1,20 @@
+Development guides
+=========================
+mesher is an out of box service mesh and API gateway component,
+you can use them by simply setting configuration files.
+But some of user still need to customize a service mesh or API gateway.
+For example:
+
+- API gateway need to query account system and do the authentication and authorization.
+- mesher need to access cloud provider API
+- mesher use customized control panel
+- mesher use customized config server
+
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   development/handler-chain
+   development/cloud-provider
+   development/build

content/docs/mesher/1.6.3/_sources/development/build.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/development/build.md.txt b/content/docs/mesher/1.6.3/_sources/development/build.md.txt
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@@ -0,0 +1,7 @@
+# Build mesher
+you need to build and release your mesher after the customization
+
+### Build binary
+you can refer to build/build_proxy to see how we build mesher binary and docker image.
+
+build/docker/proxy/Dockerfile is a example about how to make a docker image
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/development/cloud-provider.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/development/cloud-provider.md.txt b/content/docs/mesher/1.6.3/_sources/development/cloud-provider.md.txt
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@@ -0,0 +1,33 @@
+# Cloud Provider
+By default Mesher do not support any cloud provider.
+But there is plugin that helps mesher to do it.
+
+### Huawei Cloud 
+Mesher is able to use huawei cloud ServiceComb engine. 
+#### Access ServiceComb Engine API
+import auth in cmd/mesher/mesher.go
+```go
+import _ "github.com/huaweicse/auth/adaptor/gochassis"
+```
+
+it will sign all requests between mesher to ServiceComb Engine.
+
+#### Use Config Center to manage configuration
+Mesher use servicecomb-kie as config server, 
+```go
+_ "github.com/go-chassis/go-chassis-config/servicecombkie"
+```
+when you need to use ServiceComb Engine, you must replace this line. 
+import config center in cmd/mesher/mesher.go.
+```go
+_ "github.com/go-chassis/go-chassis-config/configcenter"
+```
+set the config center in chassis.yaml
+```yaml
+  config:
+    client:
+      serverUri: https://xxx #endpoint of servicecomb engine
+      refreshMode: 1 # 1: only pull config.
+      refreshInterval: 30 # unit is second
+      type: config_center
+```
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/development/handler-chain.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/development/handler-chain.md.txt b/content/docs/mesher/1.6.3/_sources/development/handler-chain.md.txt
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@@ -0,0 +1,42 @@
+# Handler chain
+all the traffic will go through the handler chain.
+A chain is composite of handlers, each handler has a particular logic.
+Mesher also has a lots of feature working in chain, like route management, circuit breaking, rate-limiting.
+In Summary, handler is the middle ware between client and servers, 
+it is useful, when you want to add authorization to intercept illegal requests.
+
+### How to write a handler
+https://docs.go-chassis.com/dev-guides/how-to-implement-handler.html
+
+### How to use it in handler chain
+in chassis.yaml add your handler name in chain configuration.
+as side car and API gateway, mesher's chain has different meaning.
+
+For example, running as mesher-sidecar, service A call another service B, 
+outgoing chain process all the service A requests before remote call, 
+incoming chain process all the requests from service A, before access to service B API. 
+
+In summary outgoing chain works when a service attempt to call other services, 
+incoming chain works when other services call this service
+```yaml
+  handler:
+    chain:
+      Consumer:
+        # if a service call other service, it go through this chain, loadbalance and transport is must 
+        outgoing: router, bizkeeper-consumer, loadbalance, transport
+      Provider:
+        incoming: ratelimiter-provider
+```
+
+running as API gateway, 
+incoming chain process all the requests from the external network, 
+outgoing chain process all the the request between API gateway and backend services
+```yaml
+  handler:
+    chain:
+      Consumer:
+        #loadbalance and transport is must 
+        outgoing: router, bizkeeper-consumer, loadbalance, transport
+      Provider:
+        incoming: ratelimiter-provider
+```
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/get-started.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/get-started.rst.txt b/content/docs/mesher/1.6.3/_sources/get-started.rst.txt
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+Get started
+======================================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   getstarted/minimum
+   getstarted/install.md
+   getstarted/pilot-discovery.md

content/docs/mesher/1.6.3/_sources/getstarted/install.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/getstarted/install.md.txt b/content/docs/mesher/1.6.3/_sources/getstarted/install.md.txt
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+# Quick start
+
+### Local
+In this case, you will launch one mesher sidecar proxy and 
+one service developed based on go-chassis as provider
+and use curl as a dummy consumer to access this service
+
+the network traffic: curl->mesher->service
+
+
+1.Install ServiceComb [service-center](https://github.com/apache/incubator-servicecomb-service-center/releases)
+
+2.Install [go-chassis](https://go-chassis.readthedocs.io/en/latest/getstarted/install.html) and 
+run [rest server](https://github.com/go-chassis/go-chassis/tree/master/examples/rest/server)
+
+2. Build and run, use go mod(go 1.11+, experimental but a recommended way)
+```shell
+cd mesher
+GO111MODULE=on go mod download
+#optional
+GO111MODULE=on go mod vendor
+go build mesher.go
+./mesher
+```
+
+ 
+4.verify, in this case curl command is the consumer, mesher is consumer's sidecar, 
+and rest server is provider
+```shell
+export http_proxy=http://127.0.0.1:30101
+curl http://RESTServer:8083/sayhello/peter
+```
+
+**Notice**:
+>>You don't need to set service registry in chassis.yaml, 
+because by default registry address is 127.0.0.1:30100, 
+just same service center default listen address.
+
+>>curl command read lower case http_proxy environment variable.
+
+### Run on different infrastructure
+
+Mesher does not bind to any platform or infrastructures, plz refer to 
+https://github.com/go-mesh/mesher-examples/tree/master/Infrastructure
+to know how to run mesher on different infra
+
+### Sidecar injector
+Mesher supply a way to automatically inject mesher configurations in kubernetes
+
+See detail https://github.com/go-chassis/sidecar-injector

content/docs/mesher/1.6.3/_sources/getstarted/minimum.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/getstarted/minimum.md.txt b/content/docs/mesher/1.6.3/_sources/getstarted/minimum.md.txt
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@@ -0,0 +1,27 @@
+# Before you start
+Before you start, you must know what you gonna do if you use mesher as your sidecar proxy. 
+
+Assume you launched 2 services, 
+each of service has a dedicated mesher as sidecar proxy.
+
+The network traffic will be: ServiceA->mesherA->mesherB->ServiceB.
+
+To run mesher along with your services, you need to set minimum configurations as below:
+
+
+1. Give mesher your service name in microservice.yaml file 
+2. Set service discovery service(service center, Istio etc) configurations in chassis.yaml
+3. export HTTP_PROXY=http://127.0.0.1:30101 as your service runtime environment
+4. (optional)Give mesher your service port list by ENV SERVICE_PORTS or CLI --service-ports
+
+
+After the configurations, assume you serviceB is listening at 127.0.0.1:8080
+
+the serviceA must use http://ServiceB:8080/{api_path} to access ServiceB
+
+Now you can launch as many as serviceA and serviceB to make this system become a distributed system
+
+**Notice**:
+ >> consumer need to use http://provider_name:provider_port/ to access provider,
+ instead of http://provider_ip:provider_port/. 
+ if you choose to set step4, then you can simply use http://provider_name/ to access provider
\ No newline at end of file

content/docs/mesher/1.6.3/_sources/index.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/index.rst.txt b/content/docs/mesher/1.6.3/_sources/index.rst.txt
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+++ b/content/docs/mesher/1.6.3/_sources/index.rst.txt
@@ -0,0 +1,21 @@
+.. go-chassis documentation master file, created by
+   sphinx-quickstart on Fri Apr 13 17:13:49 2018.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to Mesher's documentation!
+======================================
+.. toctree::
+   :maxdepth: 4
+   :caption: User Documentations
+   :glob:
+
+   intro
+   get-started
+   configuration
+   development
+   protocols
+   istio-guides
+   sidecar
+
+

content/docs/mesher/1.6.3/_sources/intro.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/intro.rst.txt b/content/docs/mesher/1.6.3/_sources/intro.rst.txt
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+Introductions
+======================================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   intro/what-is
+   intro/concepts
+

content/docs/mesher/1.6.3/_sources/intro/concepts.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/intro/concepts.md.txt b/content/docs/mesher/1.6.3/_sources/intro/concepts.md.txt
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+# Concepts
+
+### Sidecar
+Mesher leverage 
+[distributed design pattern, sidecar](https://kubernetes.io/blog/2015/06/the-distributed-system-toolkit-patterns/) 
+to work along with service. 
+
+### go chassis 
+Mesher is a light weight sidecar proxy developed on top of go-chassis,
+so it has the same [concepts](http://go-chassis.readthedocs.io/en/latest/intro/concepts.html) with it 
+and it has all features of go chassis
+
+### DestinationResolver
+
+Destination Resolver parse request into a service name
+
+### Source Resolver
+
+source resolver get remote IP and based on remote IP, it 
+
+### Admin API
+
+Listen on isolated port, it gives a way to interact with mesher
+

content/docs/mesher/1.6.3/_sources/intro/what-is.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/intro/what-is.md.txt b/content/docs/mesher/1.6.3/_sources/intro/what-is.md.txt
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+# What is mesher
+
+Mesher is a
+ [service mesh](https://blog.buoyant.io/2017/04/25/whats-a-service-mesh-and-why-do-i-need-one/) 
+implementation based on [go chassis](https://github.com/go-chassis/go-chassis). 
+So it has all the [features](http://go-chassis.readthedocs.io/en/latest/intro/features.html) 
+of go chassis like service discovery, 
+load balancing, fault tolerance, route management,distributed tracing etc.
+it makes your service become resilience and observable 
+

content/docs/mesher/1.6.3/_sources/istio-guides.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/istio-guides.rst.txt b/content/docs/mesher/1.6.3/_sources/istio-guides.rst.txt
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@@ -0,0 +1,12 @@
+Use Istio as control plane
+=========================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   istio/getstarted
+   istio/discovery
+   istio/router
+   istio/egress
+

content/docs/mesher/1.6.3/_sources/istio/discovery.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/istio/discovery.rst.txt b/content/docs/mesher/1.6.3/_sources/istio/discovery.rst.txt
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@@ -0,0 +1,41 @@
+Discovery
+======================
+
+----
+
+Introduction
+++++
+
+Istio Pilot can be integrated with Mesher, working as the Service Discovery component.
+
+Configuration
+++++
+
+edit chassis.yaml.
+
+**registrator.disabled**
+
+ Must disable registrator, because registrator is is used in client side discovery. mesher leverage server side discovery which is supported by kubernetes
+
+**serviceDiscovery.type**
+
+ specify the discovery plugin type to "pilotv2", since Istio removes the xDS v1 API support from version 0.7.1, type "pilot" is deprecated.
+
+**serviceDiscovery.address**
+
+ the pilot address, in a typical Istio environment, pilot usually listens on the grpc port 15010.
+
+
+examples
+++++
+
+::
+
+  cse: # Using xDS v2 API
+    service:
+      Registry:
+        registrator:
+          disabled: true
+        serviceDiscovery:
+          type: pilotv2
+          address: grpc://istio-pilot.istio-system:15010

content/docs/mesher/1.6.3/_sources/istio/egress.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/istio/egress.md.txt b/content/docs/mesher/1.6.3/_sources/istio/egress.md.txt
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@@ -0,0 +1,43 @@
+# Egress
+## Introduction
+
+Mesher support Egress for your service, so that you can access any publicly accessible service from your microservice.
+ 
+## Configuration
+
+The egress related configurations is all in egress.yaml.
+
+**infra**
+> *(optional, string)* specifies from where the egress configuration need to be taken supports two values cse or pilot ,
+      cse means the egress configuration from egress.yaml file,
+      pilot means egress configuaration are taken from pilot of istio,
+      default is *cse*
+      
+**address**
+> *(optional, string)* The end point of pilot from which configuration need to be fetched.
+
+**hosts**
+> *(optional, []string)* host associated with external service, could be a DNS name with wildcard prefix
+
+**ports.port**
+> *(optional, int)* The port associated with the external service, default is *80*
+
+**ports.protocol**
+> *(optional, int)* The protocol associated with the external service,supports only http default is *HTTP*
+
+## example
+edit egress.yaml
+
+```yaml
+egress:
+  infra: cse  # pilot or cse
+  address: http://istio-pilot.istio-system:15010
+egressRule:
+  google-ext:
+    - hosts:
+        - "www.google.com"
+        - "*.yahoo.com"
+      ports:
+        - port: 80
+          protocol: HTTP
+```

content/docs/mesher/1.6.3/_sources/istio/getstarted.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/istio/getstarted.md.txt b/content/docs/mesher/1.6.3/_sources/istio/getstarted.md.txt
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@@ -0,0 +1,70 @@
+# Get started
+
+Istio Pilot can be configured as the service discovery component for mesher. By default the Pilot plugin is not compiled into mesher binary. To make mesher work with Pilot, import the plugin in mesher's entrypoint source code:
+
+```go
+import _ "github.com/apache/servicecomb-mesher/plugins/registry/istiov2"
+```
+
+Then the Pilot plugin will be installed when mesher starts. Next step, configure Pilot as service discovery in `chassis.yaml`:
+
+```yaml
+cse:
+  service:
+    registry:
+      registrator:
+        disabled: true
+      serviceDiscovery:
+        type: pilotv2
+        address: grpc://istio-pilot.istio-system:15010
+```
+
+Since mesher doesn't have to register the service to Pilot, the registrator config item should be disabled. Make serviceDiscovery.type to be pilotv2, to get service information by xDS v2 API(the v1 API is deprecated).
+
+### The routing tags in Istio
+
+In the original mesher configuration, user can specify tag based route rules, as described below:
+
+```yaml
+## router.yaml
+router:
+  infra: cse
+routeRule:
+  targetService:
+    - precedence: 2
+      route:
+      - tags:
+          version: v1
+        weight: 40
+      - tags:
+          version: v2
+          debug: true
+        weight: 40
+      - tags:
+          version: v3
+        weight: 20
+```
+
+Then in a typical Istio environment, which is likely to be Kubernetes cluster, user can specify the DestinationRules for targetService with the same tags:
+
+```yaml
+apiVersion: networking.istio.io/v1alpha3
+kind: DestinationRule
+metadata:
+  name: targetService
+spec:
+  host: targetService
+  subsets:
+  - name: v1
+    labels:
+      version: v1
+  - name: v2
+    labels:
+      version: v2
+      debug: "true"
+  - name: v3
+    labels:
+      version: v3
+```
+
+Notice that the subsets' tags are the same with those in `router.yaml`, then mesher's tag based load balancing strategy works as it originally does.

content/docs/mesher/1.6.3/_sources/istio/router.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/istio/router.md.txt b/content/docs/mesher/1.6.3/_sources/istio/router.md.txt
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+# Route Rule
+
+Instead of using CSE and route config to manage route, mesher supports Istio as a control plane to set route rule and follows the envoy API reference to manage route. This page gives the examples to show how requests are routed between micro services.
+
+## Mesher Configurations
+
+In **Consumer** router.yaml, you can set router.infra to define which router plugin mesher fetches from.  The default router.infra  is cse, which means the routerule comes from route config in CSE config-center. If router.infra is set to be pilotv2, the router.address is necessary, such as the in-cluster istio-pilot grpc address.
+
+> Notice that `infra: pilot` is deprecated since Istio removes the xDS v1 API from 0.7.1
+
+```yaml
+router:
+  infra: pilotv2 # pilotv2 or cse
+  address: grpc://istio-pilot.istio-system:15010
+```
+
+In **Both** consumer and provider registry configurations, the recommended one shows below.
+
+```yaml
+cse:
+  service:
+    registry:
+      registrator:
+        disabled: true
+      serviceDiscovery:
+        type: pilotv2
+        address: grpc://istio-pilot.istio-system:15010
+```
+
+## Kubernetes Configurations
+
+The provider applications of v1, v2 and v3 version could be deployed in kubernetes cluster as **Deployment** with differenent labels. The labels of version is necessary now,  and you need to set env to generate nodeID in Istio system, such as **POD_NAMESPACE, POD_NAME** and **INSTANCE_IP**.
+
+```yaml
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    version: v1
+    app: pilot
+    name: istioserver
+  name: istioserver-v1
+  namespace: default
+spec:
+  progressDeadlineSeconds: 600
+  replicas: 1
+  revisionHistoryLimit: 10
+  selector:
+    matchLabels:
+      app: pilot
+      version: v1
+      name: istioserver
+  strategy:
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 1
+    type: RollingUpdate
+  template:
+    metadata:
+      labels:
+        app: pilot
+        version: v1
+        name: istioserver
+    spec:
+      containers:
+      - image: gosdk-istio-server:latest
+        imagePullPolicy: Always
+        name: istioserver-v1
+        ports:
+        - containerPort: 8084
+          protocol: TCP
+        resources: {}
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
+        env:
+        - name: CSE_SERVICE_CENTER
+          value: grpc://istio-pilot.istio-system:15010
+        - name: POD_NAME
+          valueFrom:
+            fieldRef:
+              apiVersion: v1
+              fieldPath: metadata.name
+        - name: POD_NAMESPACE
+          valueFrom:
+            fieldRef:
+              apiVersion: v1
+              fieldPath: metadata.namespace
+        - name: INSTANCE_IP
+          valueFrom:
+            fieldRef:
+              apiVersion: v1
+              fieldPath: status.podIP
+        volumeMounts:
+        - mountPath: /etc/certs/
+          name: istio-certs
+          readOnly: true
+      dnsPolicy: ClusterFirst
+      initContainers:
+      restartPolicy: Always
+      schedulerName: default-scheduler
+      securityContext: {}
+      terminationGracePeriodSeconds: 30
+      volumes:
+      - name: istio-certs
+        secret:
+          defaultMode: 420
+          optional: true
+          secretName: istio.default
+```
+
+## Istio v1alpha3 router configurations
+
+ [Traffic-management](https://istio.io/docs/tasks/traffic-management/request-routing/) gives references and examples of Istio new router rule schema. First, subsets is defined according to labels. Then you can set route rule of differenent weight for virtual services.
+
+```yaml
+apiVersion: networking.istio.io/v1alpha3
+kind: DestinationRule
+metadata:
+  name: istioserver
+spec:
+  host: istioserver
+  subsets:
+  - name: v1
+    labels:
+      version: v1
+  - name: v2
+    labels:
+      version: v2
+  - name: v3
+    labels:
+      version: v3
+```
+
+> **NOTICE: The subsets only support labels of version to distinguish differenent virtual services, this constrains will canceled later.**
+
+```yaml
+apiVersion: networking.istio.io/v1alpha3
+kind: VirtualService
+metadata:
+  name: istioserver
+spec:
+  hosts:
+    - istioserver
+  http:
+  - route:
+    - destination:
+        host: istioserver
+        subset: v1
+      weight: 25
+    - destination:
+        host: istioserver
+        subset: v2
+      weight: 25
+    - destination:
+        host: istioserver
+        subset: v3
+      weight: 50
+
+```

content/docs/mesher/1.6.3/_sources/mesher-sidecar.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/mesher-sidecar.rst.txt b/content/docs/mesher/1.6.3/_sources/mesher-sidecar.rst.txt
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@@ -0,0 +1,8 @@
+Sidecar usage guide
+=========================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   sidecar

content/docs/mesher/1.6.3/_sources/protocols.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/protocols.rst.txt b/content/docs/mesher/1.6.3/_sources/protocols.rst.txt
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@@ -0,0 +1,8 @@
+Protocols
+=========================
+
+.. toctree::
+   :maxdepth: 4
+   :glob:
+
+   protocols/grpc

content/docs/mesher/1.6.3/_sources/protocols/grpc.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/protocols/grpc.md.txt b/content/docs/mesher/1.6.3/_sources/protocols/grpc.md.txt
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@@ -0,0 +1,28 @@
+# gRPC Protocol
+
+Mesher support gRPC protocol
+
+### Configurations
+To enable gRPC proxy you must set the protocol config 
+```yaml
+cse:
+  protocols:
+    grpc:
+      listenAddress: 127.0.0.1:40101 # or internalIP:port
+```
+
+### How to use mesher as sidecar proxy
+Assume you original client is 
+```go
+	conn, err := grpc.Dial("10.0.1.1:50051",
+		grpc.WithInsecure(),
+		)
+```
+set http_proxy
+```bash
+export http_proxy=http://127.0.0.1:40100
+```
+
+
+## example
+A gRPC example is [here](https://github.com/go-mesh/mesher-examples/tree/master/protocol/grpc-go)

content/docs/mesher/1.6.3/_sources/sidecar.rst.txt

diff --git a/content/docs/mesher/1.6.3/_sources/sidecar.rst.txt b/content/docs/mesher/1.6.3/_sources/sidecar.rst.txt
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+Sidcar-injector Deployment and Usage
+====================================
+
+Introduction
+~~~~~~~~~~~~
+
+Sidecar is a way to run alongside your service as a second process.
+The role of the sidecar is to augment and improve the application container, often without the application container's knowledge.
+
+sidecar is a pattern of "Single-node, multi container application".
+
+This pattern is particularly useful when using kubernetes as container orchestration platform.
+Kubernetes uses pods. A pod is composed of one or more application containers. A sidecar is a utility container in the pod and its purpose is to support the main container. It is important to note that standalone sidecar doesnot serve any purpose, it must be paired with one or more main containers.
+Generally, sidecar container is reusable and can be paired with numerous type of main containers.
+
+For design pattern please refer
+
+`Container Design Pattern <https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/45406.pdf>`_
+
+Example:
+The main container might be a web server, and it might be paired with a "logsaver" sidecar container that collects the web server's logs from local disk and streams them to a cluster.
+
+Injection
+~~~~~~~~~
+
+Two types
+
+1. Manual sidecar injection
+
+2. Automatic sidecar injection
+
+Manual sidecar injection
+~~~~~~~~~~~~~~~~~~~~~~~~
+In manual sidecar injection user has to provide sidecar information in deployment.
+
+ .. image:: images/pod.png
+    :alt: communication
+
+Automatic sidecar injection
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Sidecars can be automatically added to applicable Kubernetes pods using
+
+`mutating webhook admission controller <https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/>`_
+Note that unlike manual injection, automatic injection occurs at the pod-level.
+You won’t see any change to the deployment itself.
+
+`Verify <https://github.com/go-chassis/sidecar-injector#verification>`_
+
+How it works
+~~~~~~~~~~~~
+
+sidecar will deploy along side with main container as shown below
+
+The figure shows the client and server communication using mesher as a sidecar.
+
+ .. image:: images/mesher.png 
+    :alt: communication
+
+Explanation:
+
+Mesher is deployed as a sidecar along with main container of server and client in a pod.
+
+client and server will implement some rest api's
+and functionalities like
+loadbalance, circuit-breaker, fault-injection, routerule, discovery etc... will be provided by mesher(sidecar).
+
+workflow:
+
+user/curl----->client(main container)----->mesher(sidecar container)----->mesher(sidecar container)----->server(main container).
+
+Deployment Of Sidecar-Injector
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+`Prerequisites <https://github.com/go-chassis/sidecar-injector#prerequisites>`_
+
+`Quick start <https://github.com/go-chassis/sidecar-injector#quick-start>`_
+
+Use below links to build and Install sidecar
+
+`build <https://github.com/go-chassis/sidecar-injector#build>`_
+`install <https://github.com/go-chassis/sidecar-injector#install>`_
+
+Annotations
+~~~~~~~~~~~
+
+Refer k8s document 
+
+`Annotation <https://kubernetes.io/docs/concepts/overview/working-with-objects/annotations/>`_
+
+Deployment of application
+~~~~~~~~~~~~~~~~~~~~~~~~~
+The Sidecar-injector will automatically inject mesher containers into your application pods.
+
+Following are the annotations used to inject mesher sidecar into the user pod
+
+1. sidecar.mesher.io/inject:
+
+	The allowed values are "yes" or "y"
+
+	If "yes" or "y" provided the sidecar will inject in the main container.
+	If not, sidecar will not inject in the main container.
+
+2. sidecar.mesher.io/discoveryType:
+
+	The allowed values are "sc" and "pilot"
+
+	If value is "sc" it will use serviecComb service-center as a registry and discovery.
+	If value is "pilot" it will use the istio pilot as a discovery.
+
+3. sidecar.mesher.io/servicePorts:
+
+	serviceports are the port values of actual main server container append with "rest or grps"
+
+	ex: sidecar.mesher.io/servicePorts: rest:9999
+
+Required annotation for client and server
+	sidecar.mesher.io/inject:
+
+Optional annotation for client and server
+	sidecar.mesher.io/discoveryType:
+
+Optional annotation for server
+	sidecar.mesher.io/servicePorts:
+
+Prerequisites before deploying application
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Label the chassis namespace with sidecar-injector=enabled
+
+**kubectl label namespace chassis sidecar-injector=enabled**
+
+**kubectl get namespace -L sidecar-injector**
+
+ .. image:: images/label.png
+    :alt: communication
+
+Usage of istio
+~~~~~~~~~~~~~~
+
+To use istio following are the required annotation to be given in client and server yaml file
+sidecar.mesher.io/inject: "yes" and sidecar.mesher.io/discoveryType:"pilot"
+
+`Example to use pilot registry <https://github.com/go-chassis/sidecar-injector/tree/master/example/WithoutServicePort/pilot>`_
+
+deploy the examples using kubectl command line
+
+`kubectl create -f <filename.yaml> -n chassis`
+
+
+Usage of serviceComb
+~~~~~~~~~~~~~~~~~~~~
+
+To use service-center following are the required annotation to be given in client and server yaml file
+sidecar.mesher.io/inject: "yes" and sidecar.mesher.io/discoveryType:"sc"
+
+`Example to use sc registry <https://github.com/go-chassis/sidecar-injector/tree/master/example/WithoutServicePort/sc>`_
+
+deploy the examples using kubectl command line
+
+`kubectl create -f <filename.yaml> -n chassis`
+
+Verification
+~~~~~~~~~~~~
+
+`Follow <https://github.com/go-chassis/sidecar-injector#verification>`_

content/docs/mesher/1.6.3/_sources/skywalking/skywalking.md.txt

diff --git a/content/docs/mesher/1.6.3/_sources/skywalking/skywalking.md.txt b/content/docs/mesher/1.6.3/_sources/skywalking/skywalking.md.txt
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@@ -0,0 +1,36 @@
+# SkyWalking
+
+Skywalking-manager is a handler plugin of mesher, it reports tracing data to skywalking server.
+
+## Configurations
+**In conf/mesher.conf**
+
+**servicecomb.apm.tracing.enable**
+>  *(optional, bool)* enable application performance manager
+
+**servicecomb.apm.tracing.serverUri**
+>  *(optional, string)* server address of skywalking
+
+## Example
+```yaml
+servicecomb:
+  apm:                              #application performance monitor
+    tracing:
+      enable: true                  #enable tracing ability
+      serverUri: 127.0.0.1:11800    #url of skywalking 
+```
+## Step：
+
+# 1. SkyWawlking-Manager Init
+**You must init skywawlking manager pkg which will manage connection and report msg to skywalking**
+- For example:
+- [1] You can import skywalking manager proxy/pkg/skywalking in file proxy/bootstrap/bootstrap.go.
+- [2] Calling function Init() in proxy/pkg/skywalking manually to init skywalking manager.
+- [3] Adding skywalking's consumer handler name SkyWalkingConsumer defined in proxy/pkg/skywalking to consumerChain.
+- [4] Adding skywalking's provider handler name SkyWalkingProvider defined in proxy/pkg/skywalking to providerChain.
+- more details about handler chains in [go-chassis](https://github.com/go-chassis/go-chassis#readme)
+
+# 2. SkyWalking-Handler Init
+- You must import proxy/handler pkg to init skywalking handler. Not only skywalking handler, all the handlers which are customized for mesher are defined here.
+- For example you can import handler pkg in file cmd/mesher/mesher.go
+

content/docs/mesher/1.6.3/_static/basic.css

diff --git a/content/docs/mesher/1.6.3/_static/basic.css b/content/docs/mesher/1.6.3/_static/basic.css
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@@ -0,0 +1,764 @@
+/*
+ * basic.css
+ * ~~~~~~~~~
+ *
+ * Sphinx stylesheet -- basic theme.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+/* -- main layout ----------------------------------------------------------- */
+
+div.clearer {
+    clear: both;
+}
+
+/* -- relbar ---------------------------------------------------------------- */
+
+div.related {
+    width: 100%;
+    font-size: 90%;
+}
+
+div.related h3 {
+    display: none;
+}
+
+div.related ul {
+    margin: 0;
+    padding: 0 0 0 10px;
+    list-style: none;
+}
+
+div.related li {
+    display: inline;
+}
+
+div.related li.right {
+    float: right;
+    margin-right: 5px;
+}
+
+/* -- sidebar --------------------------------------------------------------- */
+
+div.sphinxsidebarwrapper {
+    padding: 10px 5px 0 10px;
+}
+
+div.sphinxsidebar {
+    float: left;
+    width: 230px;
+    margin-left: -100%;
+    font-size: 90%;
+    word-wrap: break-word;
+    overflow-wrap : break-word;
+}
+
+div.sphinxsidebar ul {
+    list-style: none;
+}
+
+div.sphinxsidebar ul ul,
+div.sphinxsidebar ul.want-points {
+    margin-left: 20px;
+    list-style: square;
+}
+
+div.sphinxsidebar ul ul {
+    margin-top: 0;
+    margin-bottom: 0;
+}
+
+div.sphinxsidebar form {
+    margin-top: 10px;
+}
+
+div.sphinxsidebar input {
+    border: 1px solid #98dbcc;
+    font-family: sans-serif;
+    font-size: 1em;
+}
+
+div.sphinxsidebar #searchbox form.search {
+    overflow: hidden;
+}
+
+div.sphinxsidebar #searchbox input[type="text"] {
+    float: left;
+    width: 80%;
+    padding: 0.25em;
+    box-sizing: border-box;
+}
+
+div.sphinxsidebar #searchbox input[type="submit"] {
+    float: left;
+    width: 20%;
+    border-left: none;
+    padding: 0.25em;
+    box-sizing: border-box;
+}
+
+
+img {
+    border: 0;
+    max-width: 100%;
+}
+
+/* -- search page ----------------------------------------------------------- */
+
+ul.search {
+    margin: 10px 0 0 20px;
+    padding: 0;
+}
+
+ul.search li {
+    padding: 5px 0 5px 20px;
+    background-image: url(file.png);
+    background-repeat: no-repeat;
+    background-position: 0 7px;
+}
+
+ul.search li a {
+    font-weight: bold;
+}
+
+ul.search li div.context {
+    color: #888;
+    margin: 2px 0 0 30px;
+    text-align: left;
+}
+
+ul.keywordmatches li.goodmatch a {
+    font-weight: bold;
+}
+
+/* -- index page ------------------------------------------------------------ */
+
+table.contentstable {
+    width: 90%;
+    margin-left: auto;
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+    background-color: #ffe;
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+    float: right;
+}
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+}
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content/docs/mesher/1.6.3/_static/css/badge_only.css

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new file mode 100644
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content/docs/mesher/1.6.3/_static/css/theme.css

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new file mode 100644
index 0000000..aed8cef
--- /dev/null
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content/docs/mesher/1.6.3/_static/doctools.js

diff --git a/content/docs/mesher/1.6.3/_static/doctools.js b/content/docs/mesher/1.6.3/_static/doctools.js
new file mode 100644
index 0000000..b33f87f
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/doctools.js
@@ -0,0 +1,314 @@
+/*
+ * doctools.js
+ * ~~~~~~~~~~~
+ *
+ * Sphinx JavaScript utilities for all documentation.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+/**
+ * select a different prefix for underscore
+ */
+$u = _.noConflict();
+
+/**
+ * make the code below compatible with browsers without
+ * an installed firebug like debugger
+if (!window.console || !console.firebug) {
+  var names = ["log", "debug", "info", "warn", "error", "assert", "dir",
+    "dirxml", "group", "groupEnd", "time", "timeEnd", "count", "trace",
+    "profile", "profileEnd"];
+  window.console = {};
+  for (var i = 0; i < names.length; ++i)
+    window.console[names[i]] = function() {};
+}
+ */
+
+/**
+ * small helper function to urldecode strings
+ */
+jQuery.urldecode = function(x) {
+  return decodeURIComponent(x).replace(/\+/g, ' ');
+};
+
+/**
+ * small helper function to urlencode strings
+ */
+jQuery.urlencode = encodeURIComponent;
+
+/**
+ * This function returns the parsed url parameters of the
+ * current request. Multiple values per key are supported,
+ * it will always return arrays of strings for the value parts.
+ */
+jQuery.getQueryParameters = function(s) {
+  if (typeof s === 'undefined')
+    s = document.location.search;
+  var parts = s.substr(s.indexOf('?') + 1).split('&');
+  var result = {};
+  for (var i = 0; i < parts.length; i++) {
+    var tmp = parts[i].split('=', 2);
+    var key = jQuery.urldecode(tmp[0]);
+    var value = jQuery.urldecode(tmp[1]);
+    if (key in result)
+      result[key].push(value);
+    else
+      result[key] = [value];
+  }
+  return result;
+};
+
+/**
+ * highlight a given string on a jquery object by wrapping it in
+ * span elements with the given class name.
+ */
+jQuery.fn.highlightText = function(text, className) {
+  function highlight(node, addItems) {
+    if (node.nodeType === 3) {
+      var val = node.nodeValue;
+      var pos = val.toLowerCase().indexOf(text);
+      if (pos >= 0 &&
+          !jQuery(node.parentNode).hasClass(className) &&
+          !jQuery(node.parentNode).hasClass("nohighlight")) {
+        var span;
+        var isInSVG = jQuery(node).closest("body, svg, foreignObject").is("svg");
+        if (isInSVG) {
+          span = document.createElementNS("http://www.w3.org/2000/svg", "tspan");
+        } else {
+          span = document.createElement("span");
+          span.className = className;
+        }
+        span.appendChild(document.createTextNode(val.substr(pos, text.length)));
+        node.parentNode.insertBefore(span, node.parentNode.insertBefore(
+          document.createTextNode(val.substr(pos + text.length)),
+          node.nextSibling));
+        node.nodeValue = val.substr(0, pos);
+        if (isInSVG) {
+          var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
+          var bbox = node.parentElement.getBBox();
+          rect.x.baseVal.value = bbox.x;
+          rect.y.baseVal.value = bbox.y;
+          rect.width.baseVal.value = bbox.width;
+          rect.height.baseVal.value = bbox.height;
+          rect.setAttribute('class', className);
+          addItems.push({
+              "parent": node.parentNode,
+              "target": rect});
+        }
+      }
+    }
+    else if (!jQuery(node).is("button, select, textarea")) {
+      jQuery.each(node.childNodes, function() {
+        highlight(this, addItems);
+      });
+    }
+  }
+  var addItems = [];
+  var result = this.each(function() {
+    highlight(this, addItems);
+  });
+  for (var i = 0; i < addItems.length; ++i) {
+    jQuery(addItems[i].parent).before(addItems[i].target);
+  }
+  return result;
+};
+
+/*
+ * backward compatibility for jQuery.browser
+ * This will be supported until firefox bug is fixed.
+ */
+if (!jQuery.browser) {
+  jQuery.uaMatch = function(ua) {
+    ua = ua.toLowerCase();
+
+    var match = /(chrome)[ \/]([\w.]+)/.exec(ua) ||
+      /(webkit)[ \/]([\w.]+)/.exec(ua) ||
+      /(opera)(?:.*version|)[ \/]([\w.]+)/.exec(ua) ||
+      /(msie) ([\w.]+)/.exec(ua) ||
+      ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec(ua) ||
+      [];
+
+    return {
+      browser: match[ 1 ] || "",
+      version: match[ 2 ] || "0"
+    };
+  };
+  jQuery.browser = {};
+  jQuery.browser[jQuery.uaMatch(navigator.userAgent).browser] = true;
+}
+
+/**
+ * Small JavaScript module for the documentation.
+ */
+var Documentation = {
+
+  init : function() {
+    this.fixFirefoxAnchorBug();
+    this.highlightSearchWords();
+    this.initIndexTable();
+    if (DOCUMENTATION_OPTIONS.NAVIGATION_WITH_KEYS) {
+      this.initOnKeyListeners();
+    }
+  },
+
+  /**
+   * i18n support
+   */
+  TRANSLATIONS : {},
+  PLURAL_EXPR : function(n) { return n === 1 ? 0 : 1; },
+  LOCALE : 'unknown',
+
+  // gettext and ngettext don't access this so that the functions
+  // can safely bound to a different name (_ = Documentation.gettext)
+  gettext : function(string) {
+    var translated = Documentation.TRANSLATIONS[string];
+    if (typeof translated === 'undefined')
+      return string;
+    return (typeof translated === 'string') ? translated : translated[0];
+  },
+
+  ngettext : function(singular, plural, n) {
+    var translated = Documentation.TRANSLATIONS[singular];
+    if (typeof translated === 'undefined')
+      return (n == 1) ? singular : plural;
+    return translated[Documentation.PLURALEXPR(n)];
+  },
+
+  addTranslations : function(catalog) {
+    for (var key in catalog.messages)
+      this.TRANSLATIONS[key] = catalog.messages[key];
+    this.PLURAL_EXPR = new Function('n', 'return +(' + catalog.plural_expr + ')');
+    this.LOCALE = catalog.locale;
+  },
+
+  /**
+   * add context elements like header anchor links
+   */
+  addContextElements : function() {
+    $('div[id] > :header:first').each(function() {
+      $('<a class="headerlink">\u00B6</a>').
+      attr('href', '#' + this.id).
+      attr('title', _('Permalink to this headline')).
+      appendTo(this);
+    });
+    $('dt[id]').each(function() {
+      $('<a class="headerlink">\u00B6</a>').
+      attr('href', '#' + this.id).
+      attr('title', _('Permalink to this definition')).
+      appendTo(this);
+    });
+  },
+
+  /**
+   * workaround a firefox stupidity
+   * see: https://bugzilla.mozilla.org/show_bug.cgi?id=645075
+   */
+  fixFirefoxAnchorBug : function() {
+    if (document.location.hash && $.browser.mozilla)
+      window.setTimeout(function() {
+        document.location.href += '';
+      }, 10);
+  },
+
+  /**
+   * highlight the search words provided in the url in the text
+   */
+  highlightSearchWords : function() {
+    var params = $.getQueryParameters();
+    var terms = (params.highlight) ? params.highlight[0].split(/\s+/) : [];
+    if (terms.length) {
+      var body = $('div.body');
+      if (!body.length) {
+        body = $('body');
+      }
+      window.setTimeout(function() {
+        $.each(terms, function() {
+          body.highlightText(this.toLowerCase(), 'highlighted');
+        });
+      }, 10);
+      $('<p class="highlight-link"><a href="javascript:Documentation.' +
+        'hideSearchWords()">' + _('Hide Search Matches') + '</a></p>')
+          .appendTo($('#searchbox'));
+    }
+  },
+
+  /**
+   * init the domain index toggle buttons
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+  initIndexTable : function() {
+    var togglers = $('img.toggler').click(function() {
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+      var idnum = $(this).attr('id').substr(7);
+      $('tr.cg-' + idnum).toggle();
+      if (src.substr(-9) === 'minus.png')
+        $(this).attr('src', src.substr(0, src.length-9) + 'plus.png');
+      else
+        $(this).attr('src', src.substr(0, src.length-8) + 'minus.png');
+    }).css('display', '');
+    if (DOCUMENTATION_OPTIONS.COLLAPSE_INDEX) {
+        togglers.click();
+    }
+  },
+
+  /**
+   * helper function to hide the search marks again
+   */
+  hideSearchWords : function() {
+    $('#searchbox .highlight-link').fadeOut(300);
+    $('span.highlighted').removeClass('highlighted');
+  },
+
+  /**
+   * make the url absolute
+   */
+  makeURL : function(relativeURL) {
+    return DOCUMENTATION_OPTIONS.URL_ROOT + '/' + relativeURL;
+  },
+
+  /**
+   * get the current relative url
+   */
+  getCurrentURL : function() {
+    var path = document.location.pathname;
+    var parts = path.split(/\//);
+    $.each(DOCUMENTATION_OPTIONS.URL_ROOT.split(/\//), function() {
+      if (this === '..')
+        parts.pop();
+    });
+    var url = parts.join('/');
+    return path.substring(url.lastIndexOf('/') + 1, path.length - 1);
+  },
+
+  initOnKeyListeners: function() {
+    $(document).keyup(function(event) {
+      var activeElementType = document.activeElement.tagName;
+      // don't navigate when in search box or textarea
+      if (activeElementType !== 'TEXTAREA' && activeElementType !== 'INPUT' && activeElementType !== 'SELECT') {
+        switch (event.keyCode) {
+          case 37: // left
+            var prevHref = $('link[rel="prev"]').prop('href');
+            if (prevHref) {
+              window.location.href = prevHref;
+              return false;
+            }
+          case 39: // right
+            var nextHref = $('link[rel="next"]').prop('href');
+            if (nextHref) {
+              window.location.href = nextHref;
+              return false;
+            }
+        }
+      }
+    });
+  }
+};
+
+// quick alias for translations
+_ = Documentation.gettext;
+
+$(document).ready(function() {
+  Documentation.init();
+});

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+    LANGUAGE: 'None',
+    COLLAPSE_INDEX: false,
+    FILE_SUFFIX: '.html',
+    HAS_SOURCE: true,
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content/docs/mesher/1.6.3/_static/fonts/fontawesome-webfont.ttf

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content/docs/mesher/1.6.3/_static/fonts/fontawesome-webfont.woff

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content/docs/mesher/1.6.3/_static/fonts/fontawesome-webfont.woff2

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content/docs/mesher/1.6.3/_static/jquery-3.4.1.js

diff --git a/content/docs/mesher/1.6.3/_static/jquery-3.4.1.js b/content/docs/mesher/1.6.3/_static/jquery-3.4.1.js
new file mode 100644
index 0000000..773ad95
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/jquery-3.4.1.js
@@ -0,0 +1,10598 @@
+/*!
+ * jQuery JavaScript Library v3.4.1
+ * https://jquery.com/
+ *
+ * Includes Sizzle.js
+ * https://sizzlejs.com/
+ *
+ * Copyright JS Foundation and other contributors
+ * Released under the MIT license
+ * https://jquery.org/license
+ *
+ * Date: 2019-05-01T21:04Z
+ */
+( function( global, factory ) {
+
+	"use strict";
+
+	if ( typeof module === "object" && typeof module.exports === "object" ) {
+
+		// For CommonJS and CommonJS-like environments where a proper `window`
+		// is present, execute the factory and get jQuery.
+		// For environments that do not have a `window` with a `document`
+		// (such as Node.js), expose a factory as module.exports.
+		// This accentuates the need for the creation of a real `window`.
+		// e.g. var jQuery = require("jquery")(window);
+		// See ticket #14549 for more info.
+		module.exports = global.document ?
+			factory( global, true ) :
+			function( w ) {
+				if ( !w.document ) {
+					throw new Error( "jQuery requires a window with a document" );
+				}
+				return factory( w );
+			};
+	} else {
+		factory( global );
+	}
+
+// Pass this if window is not defined yet
+} )( typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
+
+// Edge <= 12 - 13+, Firefox <=18 - 45+, IE 10 - 11, Safari 5.1 - 9+, iOS 6 - 9.1
+// throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode
+// arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common
+// enough that all such attempts are guarded in a try block.
+"use strict";
+
+var arr = [];
+
+var document = window.document;
+
+var getProto = Object.getPrototypeOf;
+
+var slice = arr.slice;
+
+var concat = arr.concat;
+
+var push = arr.push;
+
+var indexOf = arr.indexOf;
+
+var class2type = {};
+
+var toString = class2type.toString;
+
+var hasOwn = class2type.hasOwnProperty;
+
+var fnToString = hasOwn.toString;
+
+var ObjectFunctionString = fnToString.call( Object );
+
+var support = {};
+
+var isFunction = function isFunction( obj ) {
+
+      // Support: Chrome <=57, Firefox <=52
+      // In some browsers, typeof returns "function" for HTML <object> elements
+      // (i.e., `typeof document.createElement( "object" ) === "function"`).
+      // We don't want to classify *any* DOM node as a function.
+      return typeof obj === "function" && typeof obj.nodeType !== "number";
+  };
+
+
+var isWindow = function isWindow( obj ) {
+		return obj != null && obj === obj.window;
+	};
+
+
+
+
+	var preservedScriptAttributes = {
+		type: true,
+		src: true,
+		nonce: true,
+		noModule: true
+	};
+
+	function DOMEval( code, node, doc ) {
+		doc = doc || document;
+
+		var i, val,
+			script = doc.createElement( "script" );
+
+		script.text = code;
+		if ( node ) {
+			for ( i in preservedScriptAttributes ) {
+
+				// Support: Firefox 64+, Edge 18+
+				// Some browsers don't support the "nonce" property on scripts.
+				// On the other hand, just using `getAttribute` is not enough as
+				// the `nonce` attribute is reset to an empty string whenever it
+				// becomes browsing-context connected.
+				// See https://github.com/whatwg/html/issues/2369
+				// See https://html.spec.whatwg.org/#nonce-attributes
+				// The `node.getAttribute` check was added for the sake of
+				// `jQuery.globalEval` so that it can fake a nonce-containing node
+				// via an object.
+				val = node[ i ] || node.getAttribute && node.getAttribute( i );
+				if ( val ) {
+					script.setAttribute( i, val );
+				}
+			}
+		}
+		doc.head.appendChild( script ).parentNode.removeChild( script );
+	}
+
+
+function toType( obj ) {
+	if ( obj == null ) {
+		return obj + "";
+	}
+
+	// Support: Android <=2.3 only (functionish RegExp)
+	return typeof obj === "object" || typeof obj === "function" ?
+		class2type[ toString.call( obj ) ] || "object" :
+		typeof obj;
+}
+/* global Symbol */
+// Defining this global in .eslintrc.json would create a danger of using the global
+// unguarded in another place, it seems safer to define global only for this module
+
+
+
+var
+	version = "3.4.1",
+
+	// Define a local copy of jQuery
+	jQuery = function( selector, context ) {
+
+		// The jQuery object is actually just the init constructor 'enhanced'
+		// Need init if jQuery is called (just allow error to be thrown if not included)
+		return new jQuery.fn.init( selector, context );
+	},
+
+	// Support: Android <=4.0 only
+	// Make sure we trim BOM and NBSP
+	rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
+
+jQuery.fn = jQuery.prototype = {
+
+	// The current version of jQuery being used
+	jquery: version,
+
+	constructor: jQuery,
+
+	// The default length of a jQuery object is 0
+	length: 0,
+
+	toArray: function() {
+		return slice.call( this );
+	},
+
+	// Get the Nth element in the matched element set OR
+	// Get the whole matched element set as a clean array
+	get: function( num ) {
+
+		// Return all the elements in a clean array
+		if ( num == null ) {
+			return slice.call( this );
+		}
+
+		// Return just the one element from the set
+		return num < 0 ? this[ num + this.length ] : this[ num ];
+	},
+
+	// Take an array of elements and push it onto the stack
+	// (returning the new matched element set)
+	pushStack: function( elems ) {
+
+		// Build a new jQuery matched element set
+		var ret = jQuery.merge( this.constructor(), elems );
+
+		// Add the old object onto the stack (as a reference)
+		ret.prevObject = this;
+
+		// Return the newly-formed element set
+		return ret;
+	},
+
+	// Execute a callback for every element in the matched set.
+	each: function( callback ) {
+		return jQuery.each( this, callback );
+	},
+
+	map: function( callback ) {
+		return this.pushStack( jQuery.map( this, function( elem, i ) {
+			return callback.call( elem, i, elem );
+		} ) );
+	},
+
+	slice: function() {
+		return this.pushStack( slice.apply( this, arguments ) );
+	},
+
+	first: function() {
+		return this.eq( 0 );
+	},
+
+	last: function() {
+		return this.eq( -1 );
+	},
+
+	eq: function( i ) {
+		var len = this.length,
+			j = +i + ( i < 0 ? len : 0 );
+		return this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );
+	},
+
+	end: function() {
+		return this.prevObject || this.constructor();
+	},
+
+	// For internal use only.
+	// Behaves like an Array's method, not like a jQuery method.
+	push: push,
+	sort: arr.sort,
+	splice: arr.splice
+};
+
+jQuery.extend = jQuery.fn.extend = function() {
+	var options, name, src, copy, copyIsArray, clone,
+		target = arguments[ 0 ] || {},
+		i = 1,
+		length = arguments.length,
+		deep = false;
+
+	// Handle a deep copy situation
+	if ( typeof target === "boolean" ) {
+		deep = target;
+
+		// Skip the boolean and the target
+		target = arguments[ i ] || {};
+		i++;
+	}
+
+	// Handle case when target is a string or something (possible in deep copy)
+	if ( typeof target !== "object" && !isFunction( target ) ) {
+		target = {};
+	}
+
+	// Extend jQuery itself if only one argument is passed
+	if ( i === length ) {
+		target = this;
+		i--;
+	}
+
+	for ( ; i < length; i++ ) {
+
+		// Only deal with non-null/undefined values
+		if ( ( options = arguments[ i ] ) != null ) {
+
+			// Extend the base object
+			for ( name in options ) {
+				copy = options[ name ];
+
+				// Prevent Object.prototype pollution
+				// Prevent never-ending loop
+				if ( name === "__proto__" || target === copy ) {
+					continue;
+				}
+
+				// Recurse if we're merging plain objects or arrays
+				if ( deep && copy && ( jQuery.isPlainObject( copy ) ||
+					( copyIsArray = Array.isArray( copy ) ) ) ) {
+					src = target[ name ];
+
+					// Ensure proper type for the source value
+					if ( copyIsArray && !Array.isArray( src ) ) {
+						clone = [];
+					} else if ( !copyIsArray && !jQuery.isPlainObject( src ) ) {
+						clone = {};
+					} else {
+						clone = src;
+					}
+					copyIsArray = false;
+
+					// Never move original objects, clone them
+					target[ name ] = jQuery.extend( deep, clone, copy );
+
+				// Don't bring in undefined values
+				} else if ( copy !== undefined ) {
+					target[ name ] = copy;
+				}
+			}
+		}
+	}
+
+	// Return the modified object
+	return target;
+};
+
+jQuery.extend( {
+
+	// Unique for each copy of jQuery on the page
+	expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
+
+	// Assume jQuery is ready without the ready module
+	isReady: true,
+
+	error: function( msg ) {
+		throw new Error( msg );
+	},
+
+	noop: function() {},
+
+	isPlainObject: function( obj ) {
+		var proto, Ctor;
+
+		// Detect obvious negatives
+		// Use toString instead of jQuery.type to catch host objects
+		if ( !obj || toString.call( obj ) !== "[object Object]" ) {
+			return false;
+		}
+
+		proto = getProto( obj );
+
+		// Objects with no prototype (e.g., `Object.create( null )`) are plain
+		if ( !proto ) {
+			return true;
+		}
+
+		// Objects with prototype are plain iff they were constructed by a global Object function
+		Ctor = hasOwn.call( proto, "constructor" ) && proto.constructor;
+		return typeof Ctor === "function" && fnToString.call( Ctor ) === ObjectFunctionString;
+	},
+
+	isEmptyObject: function( obj ) {
+		var name;
+
+		for ( name in obj ) {
+			return false;
+		}
+		return true;
+	},
+
+	// Evaluates a script in a global context
+	globalEval: function( code, options ) {
+		DOMEval( code, { nonce: options && options.nonce } );
+	},
+
+	each: function( obj, callback ) {
+		var length, i = 0;
+
+		if ( isArrayLike( obj ) ) {
+			length = obj.length;
+			for ( ; i < length; i++ ) {
+				if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
+					break;
+				}
+			}
+		} else {
+			for ( i in obj ) {
+				if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
+					break;
+				}
+			}
+		}
+
+		return obj;
+	},
+
+	// Support: Android <=4.0 only
+	trim: function( text ) {
+		return text == null ?
+			"" :
+			( text + "" ).replace( rtrim, "" );
+	},
+
+	// results is for internal usage only
+	makeArray: function( arr, results ) {
+		var ret = results || [];
+
+		if ( arr != null ) {
+			if ( isArrayLike( Object( arr ) ) ) {
+				jQuery.merge( ret,
+					typeof arr === "string" ?
+					[ arr ] : arr
+				);
+			} else {
+				push.call( ret, arr );
+			}
+		}
+
+		return ret;
+	},
+
+	inArray: function( elem, arr, i ) {
+		return arr == null ? -1 : indexOf.call( arr, elem, i );
+	},
+
+	// Support: Android <=4.0 only, PhantomJS 1 only
+	// push.apply(_, arraylike) throws on ancient WebKit
+	merge: function( first, second ) {
+		var len = +second.length,
+			j = 0,
+			i = first.length;
+
+		for ( ; j < len; j++ ) {
+			first[ i++ ] = second[ j ];
+		}
+
+		first.length = i;
+
+		return first;
+	},
+
+	grep: function( elems, callback, invert ) {
+		var callbackInverse,
+			matches = [],
+			i = 0,
+			length = elems.length,
+			callbackExpect = !invert;
+
+		// Go through the array, only saving the items
+		// that pass the validator function
+		for ( ; i < length; i++ ) {
+			callbackInverse = !callback( elems[ i ], i );
+			if ( callbackInverse !== callbackExpect ) {
+				matches.push( elems[ i ] );
+			}
+		}
+
+		return matches;
+	},
+
+	// arg is for internal usage only
+	map: function( elems, callback, arg ) {
+		var length, value,
+			i = 0,
+			ret = [];
+
+		// Go through the array, translating each of the items to their new values
+		if ( isArrayLike( elems ) ) {
+			length = elems.length;
+			for ( ; i < length; i++ ) {
+				value = callback( elems[ i ], i, arg );
+
+				if ( value != null ) {
+					ret.push( value );
+				}
+			}
+
+		// Go through every key on the object,
+		} else {
+			for ( i in elems ) {
+				value = callback( elems[ i ], i, arg );
+
+				if ( value != null ) {
+					ret.push( value );
+				}
+			}
+		}
+
+		// Flatten any nested arrays
+		return concat.apply( [], ret );
+	},
+
+	// A global GUID counter for objects
+	guid: 1,
+
+	// jQuery.support is not used in Core but other projects attach their
+	// properties to it so it needs to exist.
+	support: support
+} );
+
+if ( typeof Symbol === "function" ) {
+	jQuery.fn[ Symbol.iterator ] = arr[ Symbol.iterator ];
+}
+
+// Populate the class2type map
+jQuery.each( "Boolean Number String Function Array Date RegExp Object Error Symbol".split( " " ),
+function( i, name ) {
+	class2type[ "[object " + name + "]" ] = name.toLowerCase();
+} );
+
+function isArrayLike( obj ) {
+
+	// Support: real iOS 8.2 only (not reproducible in simulator)
+	// `in` check used to prevent JIT error (gh-2145)
+	// hasOwn isn't used here due to false negatives
+	// regarding Nodelist length in IE
+	var length = !!obj && "length" in obj && obj.length,
+		type = toType( obj );
+
+	if ( isFunction( obj ) || isWindow( obj ) ) {
+		return false;
+	}
+
+	return type === "array" || length === 0 ||
+		typeof length === "number" && length > 0 && ( length - 1 ) in obj;
+}
+var Sizzle =
+/*!
+ * Sizzle CSS Selector Engine v2.3.4
+ * https://sizzlejs.com/
+ *
+ * Copyright JS Foundation and other contributors
+ * Released under the MIT license
+ * https://js.foundation/
+ *
+ * Date: 2019-04-08
+ */
+(function( window ) {
+
+var i,
+	support,
+	Expr,
+	getText,
+	isXML,
+	tokenize,
+	compile,
+	select,
+	outermostContext,
+	sortInput,
+	hasDuplicate,
+
+	// Local document vars
+	setDocument,
+	document,
+	docElem,
+	documentIsHTML,
+	rbuggyQSA,
+	rbuggyMatches,
+	matches,
+	contains,
+
+	// Instance-specific data
+	expando = "sizzle" + 1 * new Date(),
+	preferredDoc = window.document,
+	dirruns = 0,
+	done = 0,
+	classCache = createCache(),
+	tokenCache = createCache(),
+	compilerCache = createCache(),
+	nonnativeSelectorCache = createCache(),
+	sortOrder = function( a, b ) {
+		if ( a === b ) {
+			hasDuplicate = true;
+		}
+		return 0;
+	},
+
+	// Instance methods
+	hasOwn = ({}).hasOwnProperty,
+	arr = [],
+	pop = arr.pop,
+	push_native = arr.push,
+	push = arr.push,
+	slice = arr.slice,
+	// Use a stripped-down indexOf as it's faster than native
+	// https://jsperf.com/thor-indexof-vs-for/5
+	indexOf = function( list, elem ) {
+		var i = 0,
+			len = list.length;
+		for ( ; i < len; i++ ) {
+			if ( list[i] === elem ) {
+				return i;
+			}
+		}
+		return -1;
+	},
+
+	booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
+
+	// Regular expressions
+
+	// http://www.w3.org/TR/css3-selectors/#whitespace
+	whitespace = "[\\x20\\t\\r\\n\\f]",
+
+	// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
+	identifier = "(?:\\\\.|[\\w-]|[^\0-\\xa0])+",
+
+	// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
+	attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +
+		// Operator (capture 2)
+		"*([*^$|!~]?=)" + whitespace +
+		// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
+		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
+		"*\\]",
+
+	pseudos = ":(" + identifier + ")(?:\\((" +
+		// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
+		// 1. quoted (capture 3; capture 4 or capture 5)
+		"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
+		// 2. simple (capture 6)
+		"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
+		// 3. anything else (capture 2)
+		".*" +
+		")\\)|)",
+
+	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
+	rwhitespace = new RegExp( whitespace + "+", "g" ),
+	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
+
+	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
+	rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
+	rdescend = new RegExp( whitespace + "|>" ),
+
+	rpseudo = new RegExp( pseudos ),
+	ridentifier = new RegExp( "^" + identifier + "$" ),
+
+	matchExpr = {
+		"ID": new RegExp( "^#(" + identifier + ")" ),
+		"CLASS": new RegExp( "^\\.(" + identifier + ")" ),
+		"TAG": new RegExp( "^(" + identifier + "|[*])" ),
+		"ATTR": new RegExp( "^" + attributes ),
+		"PSEUDO": new RegExp( "^" + pseudos ),
+		"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
+			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
+			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
+		"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
+		// For use in libraries implementing .is()
+		// We use this for POS matching in `select`
+		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
+			whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
+	},
+
+	rhtml = /HTML$/i,
+	rinputs = /^(?:input|select|textarea|button)$/i,
+	rheader = /^h\d$/i,
+
+	rnative = /^[^{]+\{\s*\[native \w/,
+
+	// Easily-parseable/retrievable ID or TAG or CLASS selectors
+	rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
+
+	rsibling = /[+~]/,
+
+	// CSS escapes
+	// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
+	runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
+	funescape = function( _, escaped, escapedWhitespace ) {
+		var high = "0x" + escaped - 0x10000;
+		// NaN means non-codepoint
+		// Support: Firefox<24
+		// Workaround erroneous numeric interpretation of +"0x"
+		return high !== high || escapedWhitespace ?
+			escaped :
+			high < 0 ?
+				// BMP codepoint
+				String.fromCharCode( high + 0x10000 ) :
+				// Supplemental Plane codepoint (surrogate pair)
+				String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
+	},
+
+	// CSS string/identifier serialization
+	// https://drafts.csswg.org/cssom/#common-serializing-idioms
+	rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\0-\x1f\x7f-\uFFFF\w-]/g,
+	fcssescape = function( ch, asCodePoint ) {
+		if ( asCodePoint ) {
+
+			// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
+			if ( ch === "\0" ) {
+				return "\uFFFD";
+			}
+
+			// Control characters and (dependent upon position) numbers get escaped as code points
+			return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
+		}
+
+		// Other potentially-special ASCII characters get backslash-escaped
+		return "\\" + ch;
+	},
+
+	// Used for iframes
+	// See setDocument()
+	// Removing the function wrapper causes a "Permission Denied"
+	// error in IE
+	unloadHandler = function() {
+		setDocument();
+	},
+
+	inDisabledFieldset = addCombinator(
+		function( elem ) {
+			return elem.disabled === true && elem.nodeName.toLowerCase() === "fieldset";
+		},
+		{ dir: "parentNode", next: "legend" }
+	);
+
+// Optimize for push.apply( _, NodeList )
+try {
+	push.apply(
+		(arr = slice.call( preferredDoc.childNodes )),
+		preferredDoc.childNodes
+	);
+	// Support: Android<4.0
+	// Detect silently failing push.apply
+	arr[ preferredDoc.childNodes.length ].nodeType;
+} catch ( e ) {
+	push = { apply: arr.length ?
+
+		// Leverage slice if possible
+		function( target, els ) {
+			push_native.apply( target, slice.call(els) );
+		} :
+
+		// Support: IE<9
+		// Otherwise append directly
+		function( target, els ) {
+			var j = target.length,
+				i = 0;
+			// Can't trust NodeList.length
+			while ( (target[j++] = els[i++]) ) {}
+			target.length = j - 1;
+		}
+	};
+}
+
+function Sizzle( selector, context, results, seed ) {
+	var m, i, elem, nid, match, groups, newSelector,
+		newContext = context && context.ownerDocument,
+
+		// nodeType defaults to 9, since context defaults to document
+		nodeType = context ? context.nodeType : 9;
+
+	results = results || [];
+
+	// Return early from calls with invalid selector or context
+	if ( typeof selector !== "string" || !selector ||
+		nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
+
+		return results;
+	}
+
+	// Try to shortcut find operations (as opposed to filters) in HTML documents
+	if ( !seed ) {
+
+		if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
+			setDocument( context );
+		}
+		context = context || document;
+
+		if ( documentIsHTML ) {
+
+			// If the selector is sufficiently simple, try using a "get*By*" DOM method
+			// (excepting DocumentFragment context, where the methods don't exist)
+			if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
+
+				// ID selector
+				if ( (m = match[1]) ) {
+
+					// Document context
+					if ( nodeType === 9 ) {
+						if ( (elem = context.getElementById( m )) ) {
+
+							// Support: IE, Opera, Webkit
+							// TODO: identify versions
+							// getElementById can match elements by name instead of ID
+							if ( elem.id === m ) {
+								results.push( elem );
+								return results;
+							}
+						} else {
+							return results;
+						}
+
+					// Element context
+					} else {
+
+						// Support: IE, Opera, Webkit
+						// TODO: identify versions
+						// getElementById can match elements by name instead of ID
+						if ( newContext && (elem = newContext.getElementById( m )) &&
+							contains( context, elem ) &&
+							elem.id === m ) {
+
+							results.push( elem );
+							return results;
+						}
+					}
+
+				// Type selector
+				} else if ( match[2] ) {
+					push.apply( results, context.getElementsByTagName( selector ) );
+					return results;
+
+				// Class selector
+				} else if ( (m = match[3]) && support.getElementsByClassName &&
+					context.getElementsByClassName ) {
+
+					push.apply( results, context.getElementsByClassName( m ) );
+					return results;
+				}
+			}
+
+			// Take advantage of querySelectorAll
+			if ( support.qsa &&
+				!nonnativeSelectorCache[ selector + " " ] &&
+				(!rbuggyQSA || !rbuggyQSA.test( selector )) &&
+
+				// Support: IE 8 only
+				// Exclude object elements
+				(nodeType !== 1 || context.nodeName.toLowerCase() !== "object") ) {
+
+				newSelector = selector;
+				newContext = context;
+
+				// qSA considers elements outside a scoping root when evaluating child or
+				// descendant combinators, which is not what we want.
+				// In such cases, we work around the behavior by prefixing every selector in the
+				// list with an ID selector referencing the scope context.
+				// Thanks to Andrew Dupont for this technique.
+				if ( nodeType === 1 && rdescend.test( selector ) ) {
+
+					// Capture the context ID, setting it first if necessary
+					if ( (nid = context.getAttribute( "id" )) ) {
+						nid = nid.replace( rcssescape, fcssescape );
+					} else {
+						context.setAttribute( "id", (nid = expando) );
+					}
+
+					// Prefix every selector in the list
+					groups = tokenize( selector );
+					i = groups.length;
+					while ( i-- ) {
+						groups[i] = "#" + nid + " " + toSelector( groups[i] );
+					}
+					newSelector = groups.join( "," );
+
+					// Expand context for sibling selectors
+					newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
+						context;
+				}
+
+				try {
+					push.apply( results,
+						newContext.querySelectorAll( newSelector )
+					);
+					return results;
+				} catch ( qsaError ) {
+					nonnativeSelectorCache( selector, true );
+				} finally {
+					if ( nid === expando ) {
+						context.removeAttribute( "id" );
+					}
+				}
+			}
+		}
+	}
+
+	// All others
+	return select( selector.replace( rtrim, "$1" ), context, results, seed );
+}
+
+/**
+ * Create key-value caches of limited size
+ * @returns {function(string, object)} Returns the Object data after storing it on itself with
+ *	property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
+ *	deleting the oldest entry
+ */
+function createCache() {
+	var keys = [];
+
+	function cache( key, value ) {
+		// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
+		if ( keys.push( key + " " ) > Expr.cacheLength ) {
+			// Only keep the most recent entries
+			delete cache[ keys.shift() ];
+		}
+		return (cache[ key + " " ] = value);
+	}
+	return cache;
+}
+
+/**
+ * Mark a function for special use by Sizzle
+ * @param {Function} fn The function to mark
+ */
+function markFunction( fn ) {
+	fn[ expando ] = true;
+	return fn;
+}
+
+/**
+ * Support testing using an element
+ * @param {Function} fn Passed the created element and returns a boolean result
+ */
+function assert( fn ) {
+	var el = document.createElement("fieldset");
+
+	try {
+		return !!fn( el );
+	} catch (e) {
+		return false;
+	} finally {
+		// Remove from its parent by default
+		if ( el.parentNode ) {
+			el.parentNode.removeChild( el );
+		}
+		// release memory in IE
+		el = null;
+	}
+}
+
+/**
+ * Adds the same handler for all of the specified attrs
+ * @param {String} attrs Pipe-separated list of attributes
+ * @param {Function} handler The method that will be applied
+ */
+function addHandle( attrs, handler ) {
+	var arr = attrs.split("|"),
+		i = arr.length;
+
+	while ( i-- ) {
+		Expr.attrHandle[ arr[i] ] = handler;
+	}
+}
+
+/**
+ * Checks document order of two siblings
+ * @param {Element} a
+ * @param {Element} b
+ * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
+ */
+function siblingCheck( a, b ) {
+	var cur = b && a,
+		diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
+			a.sourceIndex - b.sourceIndex;
+
+	// Use IE sourceIndex if available on both nodes
+	if ( diff ) {
+		return diff;
+	}
+
+	// Check if b follows a
+	if ( cur ) {
+		while ( (cur = cur.nextSibling) ) {
+			if ( cur === b ) {
+				return -1;
+			}
+		}
+	}
+
+	return a ? 1 : -1;
+}
+
+/**
+ * Returns a function to use in pseudos for input types
+ * @param {String} type
+ */
+function createInputPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return name === "input" && elem.type === type;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for buttons
+ * @param {String} type
+ */
+function createButtonPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return (name === "input" || name === "button") && elem.type === type;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for :enabled/:disabled
+ * @param {Boolean} disabled true for :disabled; false for :enabled
+ */
+function createDisabledPseudo( disabled ) {
+
+	// Known :disabled false positives: fieldset[disabled] > legend:nth-of-type(n+2) :can-disable
+	return function( elem ) {
+
+		// Only certain elements can match :enabled or :disabled
+		// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled
+		// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled
+		if ( "form" in elem ) {
+
+			// Check for inherited disabledness on relevant non-disabled elements:
+			// * listed form-associated elements in a disabled fieldset
+			//   https://html.spec.whatwg.org/multipage/forms.html#category-listed
+			//   https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled
+			// * option elements in a disabled optgroup
+			//   https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled
+			// All such elements have a "form" property.
+			if ( elem.parentNode && elem.disabled === false ) {
+
+				// Option elements defer to a parent optgroup if present
+				if ( "label" in elem ) {
+					if ( "label" in elem.parentNode ) {
+						return elem.parentNode.disabled === disabled;
+					} else {
+						return elem.disabled === disabled;
+					}
+				}
+
+				// Support: IE 6 - 11
+				// Use the isDisabled shortcut property to check for disabled fieldset ancestors
+				return elem.isDisabled === disabled ||
+
+					// Where there is no isDisabled, check manually
+					/* jshint -W018 */
+					elem.isDisabled !== !disabled &&
+						inDisabledFieldset( elem ) === disabled;
+			}
+
+			return elem.disabled === disabled;
+
+		// Try to winnow out elements that can't be disabled before trusting the disabled property.
+		// Some victims get caught in our net (label, legend, menu, track), but it shouldn't
+		// even exist on them, let alone have a boolean value.
+		} else if ( "label" in elem ) {
+			return elem.disabled === disabled;
+		}
+
+		// Remaining elements are neither :enabled nor :disabled
+		return false;
+	};
+}
+
+/**
+ * Returns a function to use in pseudos for positionals
+ * @param {Function} fn
+ */
+function createPositionalPseudo( fn ) {
+	return markFunction(function( argument ) {
+		argument = +argument;
+		return markFunction(function( seed, matches ) {
+			var j,
+				matchIndexes = fn( [], seed.length, argument ),
+				i = matchIndexes.length;
+
+			// Match elements found at the specified indexes
+			while ( i-- ) {
+				if ( seed[ (j = matchIndexes[i]) ] ) {
+					seed[j] = !(matches[j] = seed[j]);
+				}
+			}
+		});
+	});
+}
+
+/**
+ * Checks a node for validity as a Sizzle context
+ * @param {Element|Object=} context
+ * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
+ */
+function testContext( context ) {
+	return context && typeof context.getElementsByTagName !== "undefined" && context;
+}
+
+// Expose support vars for convenience
+support = Sizzle.support = {};
+
+/**
+ * Detects XML nodes
+ * @param {Element|Object} elem An element or a document
+ * @returns {Boolean} True iff elem is a non-HTML XML node
+ */
+isXML = Sizzle.isXML = function( elem ) {
+	var namespace = elem.namespaceURI,
+		docElem = (elem.ownerDocument || elem).documentElement;
+
+	// Support: IE <=8
+	// Assume HTML when documentElement doesn't yet exist, such as inside loading iframes
+	// https://bugs.jquery.com/ticket/4833
+	return !rhtml.test( namespace || docElem && docElem.nodeName || "HTML" );
+};
+
+/**
+ * Sets document-related variables once based on the current document
+ * @param {Element|Object} [doc] An element or document object to use to set the document
+ * @returns {Object} Returns the current document
+ */
+setDocument = Sizzle.setDocument = function( node ) {
+	var hasCompare, subWindow,
+		doc = node ? node.ownerDocument || node : preferredDoc;
+
+	// Return early if doc is invalid or already selected
+	if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
+		return document;
+	}
+
+	// Update global variables
+	document = doc;
+	docElem = document.documentElement;
+	documentIsHTML = !isXML( document );
+
+	// Support: IE 9-11, Edge
+	// Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936)
+	if ( preferredDoc !== document &&
+		(subWindow = document.defaultView) && subWindow.top !== subWindow ) {
+
+		// Support: IE 11, Edge
+		if ( subWindow.addEventListener ) {
+			subWindow.addEventListener( "unload", unloadHandler, false );
+
+		// Support: IE 9 - 10 only
+		} else if ( subWindow.attachEvent ) {
+			subWindow.attachEvent( "onunload", unloadHandler );
+		}
+	}
+
+	/* Attributes
+	---------------------------------------------------------------------- */
+
+	// Support: IE<8
+	// Verify that getAttribute really returns attributes and not properties
+	// (excepting IE8 booleans)
+	support.attributes = assert(function( el ) {
+		el.className = "i";
+		return !el.getAttribute("className");
+	});
+
+	/* getElement(s)By*
+	---------------------------------------------------------------------- */
+
+	// Check if getElementsByTagName("*") returns only elements
+	support.getElementsByTagName = assert(function( el ) {
+		el.appendChild( document.createComment("") );
+		return !el.getElementsByTagName("*").length;
+	});
+
+	// Support: IE<9
+	support.getElementsByClassName = rnative.test( document.getElementsByClassName );
+
+	// Support: IE<10
+	// Check if getElementById returns elements by name
+	// The broken getElementById methods don't pick up programmatically-set names,
+	// so use a roundabout getElementsByName test
+	support.getById = assert(function( el ) {
+		docElem.appendChild( el ).id = expando;
+		return !document.getElementsByName || !document.getElementsByName( expando ).length;
+	});
+
+	// ID filter and find
+	if ( support.getById ) {
+		Expr.filter["ID"] = function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				return elem.getAttribute("id") === attrId;
+			};
+		};
+		Expr.find["ID"] = function( id, context ) {
+			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
+				var elem = context.getElementById( id );
+				return elem ? [ elem ] : [];
+			}
+		};
+	} else {
+		Expr.filter["ID"] =  function( id ) {
+			var attrId = id.replace( runescape, funescape );
+			return function( elem ) {
+				var node = typeof elem.getAttributeNode !== "undefined" &&
+					elem.getAttributeNode("id");
+				return node && node.value === attrId;
+			};
+		};
+
+		// Support: IE 6 - 7 only
+		// getElementById is not reliable as a find shortcut
+		Expr.find["ID"] = function( id, context ) {
+			if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
+				var node, i, elems,
+					elem = context.getElementById( id );
+
+				if ( elem ) {
+
+					// Verify the id attribute
+					node = elem.getAttributeNode("id");
+					if ( node && node.value === id ) {
+						return [ elem ];
+					}
+
+					// Fall back on getElementsByName
+					elems = context.getElementsByName( id );
+					i = 0;
+					while ( (elem = elems[i++]) ) {
+						node = elem.getAttributeNode("id");
+						if ( node && node.value === id ) {
+							return [ elem ];
+						}
+					}
+				}
+
+				return [];
+			}
+		};
+	}
+
+	// Tag
+	Expr.find["TAG"] = support.getElementsByTagName ?
+		function( tag, context ) {
+			if ( typeof context.getElementsByTagName !== "undefined" ) {
+				return context.getElementsByTagName( tag );
+
+			// DocumentFragment nodes don't have gEBTN
+			} else if ( support.qsa ) {
+				return context.querySelectorAll( tag );
+			}
+		} :
+
+		function( tag, context ) {
+			var elem,
+				tmp = [],
+				i = 0,
+				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
+				results = context.getElementsByTagName( tag );
+
+			// Filter out possible comments
+			if ( tag === "*" ) {
+				while ( (elem = results[i++]) ) {
+					if ( elem.nodeType === 1 ) {
+						tmp.push( elem );
+					}
+				}
+
+				return tmp;
+			}
+			return results;
+		};
+
+	// Class
+	Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
+		if ( typeof context.getElementsByClassName !== "undefined" && documentIsHTML ) {
+			return context.getElementsByClassName( className );
+		}
+	};
+
+	/* QSA/matchesSelector
+	---------------------------------------------------------------------- */
+
+	// QSA and matchesSelector support
+
+	// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
+	rbuggyMatches = [];
+
+	// qSa(:focus) reports false when true (Chrome 21)
+	// We allow this because of a bug in IE8/9 that throws an error
+	// whenever `document.activeElement` is accessed on an iframe
+	// So, we allow :focus to pass through QSA all the time to avoid the IE error
+	// See https://bugs.jquery.com/ticket/13378
+	rbuggyQSA = [];
+
+	if ( (support.qsa = rnative.test( document.querySelectorAll )) ) {
+		// Build QSA regex
+		// Regex strategy adopted from Diego Perini
+		assert(function( el ) {
+			// Select is set to empty string on purpose
+			// This is to test IE's treatment of not explicitly
+			// setting a boolean content attribute,
+			// since its presence should be enough
+			// https://bugs.jquery.com/ticket/12359
+			docElem.appendChild( el ).innerHTML = "<a id='" + expando + "'></a>" +
+				"<select id='" + expando + "-\r\\' msallowcapture=''>" +
+				"<option selected=''></option></select>";
+
+			// Support: IE8, Opera 11-12.16
+			// Nothing should be selected when empty strings follow ^= or $= or *=
+			// The test attribute must be unknown in Opera but "safe" for WinRT
+			// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
+			if ( el.querySelectorAll("[msallowcapture^='']").length ) {
+				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
+			}
+
+			// Support: IE8
+			// Boolean attributes and "value" are not treated correctly
+			if ( !el.querySelectorAll("[selected]").length ) {
+				rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
+			}
+
+			// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
+			if ( !el.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
+				rbuggyQSA.push("~=");
+			}
+
+			// Webkit/Opera - :checked should return selected option elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			// IE8 throws error here and will not see later tests
+			if ( !el.querySelectorAll(":checked").length ) {
+				rbuggyQSA.push(":checked");
+			}
+
+			// Support: Safari 8+, iOS 8+
+			// https://bugs.webkit.org/show_bug.cgi?id=136851
+			// In-page `selector#id sibling-combinator selector` fails
+			if ( !el.querySelectorAll( "a#" + expando + "+*" ).length ) {
+				rbuggyQSA.push(".#.+[+~]");
+			}
+		});
+
+		assert(function( el ) {
+			el.innerHTML = "<a href='' disabled='disabled'></a>" +
+				"<select disabled='disabled'><option/></select>";
+
+			// Support: Windows 8 Native Apps
+			// The type and name attributes are restricted during .innerHTML assignment
+			var input = document.createElement("input");
+			input.setAttribute( "type", "hidden" );
+			el.appendChild( input ).setAttribute( "name", "D" );
+
+			// Support: IE8
+			// Enforce case-sensitivity of name attribute
+			if ( el.querySelectorAll("[name=d]").length ) {
+				rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
+			}
+
+			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
+			// IE8 throws error here and will not see later tests
+			if ( el.querySelectorAll(":enabled").length !== 2 ) {
+				rbuggyQSA.push( ":enabled", ":disabled" );
+			}
+
+			// Support: IE9-11+
+			// IE's :disabled selector does not pick up the children of disabled fieldsets
+			docElem.appendChild( el ).disabled = true;
+			if ( el.querySelectorAll(":disabled").length !== 2 ) {
+				rbuggyQSA.push( ":enabled", ":disabled" );
+			}
+
+			// Opera 10-11 does not throw on post-comma invalid pseudos
+			el.querySelectorAll("*,:x");
+			rbuggyQSA.push(",.*:");
+		});
+	}
+
+	if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
+		docElem.webkitMatchesSelector ||
+		docElem.mozMatchesSelector ||
+		docElem.oMatchesSelector ||
+		docElem.msMatchesSelector) )) ) {
+
+		assert(function( el ) {
+			// Check to see if it's possible to do matchesSelector
+			// on a disconnected node (IE 9)
+			support.disconnectedMatch = matches.call( el, "*" );
+
+			// This should fail with an exception
+			// Gecko does not error, returns false instead
+			matches.call( el, "[s!='']:x" );
+			rbuggyMatches.push( "!=", pseudos );
+		});
+	}
+
+	rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
+	rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
+
+	/* Contains
+	---------------------------------------------------------------------- */
+	hasCompare = rnative.test( docElem.compareDocumentPosition );
+
+	// Element contains another
+	// Purposefully self-exclusive
+	// As in, an element does not contain itself
+	contains = hasCompare || rnative.test( docElem.contains ) ?
+		function( a, b ) {
+			var adown = a.nodeType === 9 ? a.documentElement : a,
+				bup = b && b.parentNode;
+			return a === bup || !!( bup && bup.nodeType === 1 && (
+				adown.contains ?
+					adown.contains( bup ) :
+					a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
+			));
+		} :
+		function( a, b ) {
+			if ( b ) {
+				while ( (b = b.parentNode) ) {
+					if ( b === a ) {
+						return true;
+					}
+				}
+			}
+			return false;
+		};
+
+	/* Sorting
+	---------------------------------------------------------------------- */
+
+	// Document order sorting
+	sortOrder = hasCompare ?
+	function( a, b ) {
+
+		// Flag for duplicate removal
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		// Sort on method existence if only one input has compareDocumentPosition
+		var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
+		if ( compare ) {
+			return compare;
+		}
+
+		// Calculate position if both inputs belong to the same document
+		compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
+			a.compareDocumentPosition( b ) :
+
+			// Otherwise we know they are disconnected
+			1;
+
+		// Disconnected nodes
+		if ( compare & 1 ||
+			(!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
+
+			// Choose the first element that is related to our preferred document
+			if ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
+				return -1;
+			}
+			if ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
+				return 1;
+			}
+
+			// Maintain original order
+			return sortInput ?
+				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
+				0;
+		}
+
+		return compare & 4 ? -1 : 1;
+	} :
+	function( a, b ) {
+		// Exit early if the nodes are identical
+		if ( a === b ) {
+			hasDuplicate = true;
+			return 0;
+		}
+
+		var cur,
+			i = 0,
+			aup = a.parentNode,
+			bup = b.parentNode,
+			ap = [ a ],
+			bp = [ b ];
+
+		// Parentless nodes are either documents or disconnected
+		if ( !aup || !bup ) {
+			return a === document ? -1 :
+				b === document ? 1 :
+				aup ? -1 :
+				bup ? 1 :
+				sortInput ?
+				( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
+				0;
+
+		// If the nodes are siblings, we can do a quick check
+		} else if ( aup === bup ) {
+			return siblingCheck( a, b );
+		}
+
+		// Otherwise we need full lists of their ancestors for comparison
+		cur = a;
+		while ( (cur = cur.parentNode) ) {
+			ap.unshift( cur );
+		}
+		cur = b;
+		while ( (cur = cur.parentNode) ) {
+			bp.unshift( cur );
+		}
+
+		// Walk down the tree looking for a discrepancy
+		while ( ap[i] === bp[i] ) {
+			i++;
+		}
+
+		return i ?
+			// Do a sibling check if the nodes have a common ancestor
+			siblingCheck( ap[i], bp[i] ) :
+
+			// Otherwise nodes in our document sort first
+			ap[i] === preferredDoc ? -1 :
+			bp[i] === preferredDoc ? 1 :
+			0;
+	};
+
+	return document;
+};
+
+Sizzle.matches = function( expr, elements ) {
+	return Sizzle( expr, null, null, elements );
+};
+
+Sizzle.matchesSelector = function( elem, expr ) {
+	// Set document vars if needed
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	if ( support.matchesSelector && documentIsHTML &&
+		!nonnativeSelectorCache[ expr + " " ] &&
+		( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
+		( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
+
+		try {
+			var ret = matches.call( elem, expr );
+
+			// IE 9's matchesSelector returns false on disconnected nodes
+			if ( ret || support.disconnectedMatch ||
+					// As well, disconnected nodes are said to be in a document
+					// fragment in IE 9
+					elem.document && elem.document.nodeType !== 11 ) {
+				return ret;
+			}
+		} catch (e) {
+			nonnativeSelectorCache( expr, true );
+		}
+	}
+
+	return Sizzle( expr, document, null, [ elem ] ).length > 0;
+};
+
+Sizzle.contains = function( context, elem ) {
+	// Set document vars if needed
+	if ( ( context.ownerDocument || context ) !== document ) {
+		setDocument( context );
+	}
+	return contains( context, elem );
+};
+
+Sizzle.attr = function( elem, name ) {
+	// Set document vars if needed
+	if ( ( elem.ownerDocument || elem ) !== document ) {
+		setDocument( elem );
+	}
+
+	var fn = Expr.attrHandle[ name.toLowerCase() ],
+		// Don't get fooled by Object.prototype properties (jQuery #13807)
+		val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
+			fn( elem, name, !documentIsHTML ) :
+			undefined;
+
+	return val !== undefined ?
+		val :
+		support.attributes || !documentIsHTML ?
+			elem.getAttribute( name ) :
+			(val = elem.getAttributeNode(name)) && val.specified ?
+				val.value :
+				null;
+};
+
+Sizzle.escape = function( sel ) {
+	return (sel + "").replace( rcssescape, fcssescape );
+};
+
+Sizzle.error = function( msg ) {
+	throw new Error( "Syntax error, unrecognized expression: " + msg );
+};
+
+/**
+ * Document sorting and removing duplicates
+ * @param {ArrayLike} results
+ */
+Sizzle.uniqueSort = function( results ) {
+	var elem,
+		duplicates = [],
+		j = 0,
+		i = 0;
+
+	// Unless we *know* we can detect duplicates, assume their presence
+	hasDuplicate = !support.detectDuplicates;
+	sortInput = !support.sortStable && results.slice( 0 );
+	results.sort( sortOrder );
+
+	if ( hasDuplicate ) {
+		while ( (elem = results[i++]) ) {
+			if ( elem === results[ i ] ) {
+				j = duplicates.push( i );
+			}
+		}
+		while ( j-- ) {
+			results.splice( duplicates[ j ], 1 );
+		}
+	}
+
+	// Clear input after sorting to release objects
+	// See https://github.com/jquery/sizzle/pull/225
+	sortInput = null;
+
+	return results;
+};
+
+/**
+ * Utility function for retrieving the text value of an array of DOM nodes
+ * @param {Array|Element} elem
+ */
+getText = Sizzle.getText = function( elem ) {
+	var node,
+		ret = "",
+		i = 0,
+		nodeType = elem.nodeType;
+
+	if ( !nodeType ) {
+		// If no nodeType, this is expected to be an array
+		while ( (node = elem[i++]) ) {
+			// Do not traverse comment nodes
+			ret += getText( node );
+		}
+	} else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
+		// Use textContent for elements
+		// innerText usage removed for consistency of new lines (jQuery #11153)
+		if ( typeof elem.textContent === "string" ) {
+			return elem.textContent;
+		} else {
+			// Traverse its children
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				ret += getText( elem );
+			}
+		}
+	} else if ( nodeType === 3 || nodeType === 4 ) {
+		return elem.nodeValue;
+	}
+	// Do not include comment or processing instruction nodes
+
+	return ret;
+};
+
+Expr = Sizzle.selectors = {
+
+	// Can be adjusted by the user
+	cacheLength: 50,
+
+	createPseudo: markFunction,
+
+	match: matchExpr,
+
+	attrHandle: {},
+
+	find: {},
+
+	relative: {
+		">": { dir: "parentNode", first: true },
+		" ": { dir: "parentNode" },
+		"+": { dir: "previousSibling", first: true },
+		"~": { dir: "previousSibling" }
+	},
+
+	preFilter: {
+		"ATTR": function( match ) {
+			match[1] = match[1].replace( runescape, funescape );
+
+			// Move the given value to match[3] whether quoted or unquoted
+			match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
+
+			if ( match[2] === "~=" ) {
+				match[3] = " " + match[3] + " ";
+			}
+
+			return match.slice( 0, 4 );
+		},
+
+		"CHILD": function( match ) {
+			/* matches from matchExpr["CHILD"]
+				1 type (only|nth|...)
+				2 what (child|of-type)
+				3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
+				4 xn-component of xn+y argument ([+-]?\d*n|)
+				5 sign of xn-component
+				6 x of xn-component
+				7 sign of y-component
+				8 y of y-component
+			*/
+			match[1] = match[1].toLowerCase();
+
+			if ( match[1].slice( 0, 3 ) === "nth" ) {
+				// nth-* requires argument
+				if ( !match[3] ) {
+					Sizzle.error( match[0] );
+				}
+
+				// numeric x and y parameters for Expr.filter.CHILD
+				// remember that false/true cast respectively to 0/1
+				match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
+				match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
+
+			// other types prohibit arguments
+			} else if ( match[3] ) {
+				Sizzle.error( match[0] );
+			}
+
+			return match;
+		},
+
+		"PSEUDO": function( match ) {
+			var excess,
+				unquoted = !match[6] && match[2];
+
+			if ( matchExpr["CHILD"].test( match[0] ) ) {
+				return null;
+			}
+
+			// Accept quoted arguments as-is
+			if ( match[3] ) {
+				match[2] = match[4] || match[5] || "";
+
+			// Strip excess characters from unquoted arguments
+			} else if ( unquoted && rpseudo.test( unquoted ) &&
+				// Get excess from tokenize (recursively)
+				(excess = tokenize( unquoted, true )) &&
+				// advance to the next closing parenthesis
+				(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
+
+				// excess is a negative index
+				match[0] = match[0].slice( 0, excess );
+				match[2] = unquoted.slice( 0, excess );
+			}
+
+			// Return only captures needed by the pseudo filter method (type and argument)
+			return match.slice( 0, 3 );
+		}
+	},
+
+	filter: {
+
+		"TAG": function( nodeNameSelector ) {
+			var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
+			return nodeNameSelector === "*" ?
+				function() { return true; } :
+				function( elem ) {
+					return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
+				};
+		},
+
+		"CLASS": function( className ) {
+			var pattern = classCache[ className + " " ];
+
+			return pattern ||
+				(pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
+				classCache( className, function( elem ) {
+					return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
+				});
+		},
+
+		"ATTR": function( name, operator, check ) {
+			return function( elem ) {
+				var result = Sizzle.attr( elem, name );
+
+				if ( result == null ) {
+					return operator === "!=";
+				}
+				if ( !operator ) {
+					return true;
+				}
+
+				result += "";
+
+				return operator === "=" ? result === check :
+					operator === "!=" ? result !== check :
+					operator === "^=" ? check && result.indexOf( check ) === 0 :
+					operator === "*=" ? check && result.indexOf( check ) > -1 :
+					operator === "$=" ? check && result.slice( -check.length ) === check :
+					operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
+					operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
+					false;
+			};
+		},
+
+		"CHILD": function( type, what, argument, first, last ) {
+			var simple = type.slice( 0, 3 ) !== "nth",
+				forward = type.slice( -4 ) !== "last",
+				ofType = what === "of-type";
+
+			return first === 1 && last === 0 ?
+
+				// Shortcut for :nth-*(n)
+				function( elem ) {
+					return !!elem.parentNode;
+				} :
+
+				function( elem, context, xml ) {
+					var cache, uniqueCache, outerCache, node, nodeIndex, start,
+						dir = simple !== forward ? "nextSibling" : "previousSibling",
+						parent = elem.parentNode,
+						name = ofType && elem.nodeName.toLowerCase(),
+						useCache = !xml && !ofType,
+						diff = false;
+
+					if ( parent ) {
+
+						// :(first|last|only)-(child|of-type)
+						if ( simple ) {
+							while ( dir ) {
+								node = elem;
+								while ( (node = node[ dir ]) ) {
+									if ( ofType ?
+										node.nodeName.toLowerCase() === name :
+										node.nodeType === 1 ) {
+
+										return false;
+									}
+								}
+								// Reverse direction for :only-* (if we haven't yet done so)
+								start = dir = type === "only" && !start && "nextSibling";
+							}
+							return true;
+						}
+
+						start = [ forward ? parent.firstChild : parent.lastChild ];
+
+						// non-xml :nth-child(...) stores cache data on `parent`
+						if ( forward && useCache ) {
+
+							// Seek `elem` from a previously-cached index
+
+							// ...in a gzip-friendly way
+							node = parent;
+							outerCache = node[ expando ] || (node[ expando ] = {});
+
+							// Support: IE <9 only
+							// Defend against cloned attroperties (jQuery gh-1709)
+							uniqueCache = outerCache[ node.uniqueID ] ||
+								(outerCache[ node.uniqueID ] = {});
+
+							cache = uniqueCache[ type ] || [];
+							nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
+							diff = nodeIndex && cache[ 2 ];
+							node = nodeIndex && parent.childNodes[ nodeIndex ];
+
+							while ( (node = ++nodeIndex && node && node[ dir ] ||
+
+								// Fallback to seeking `elem` from the start
+								(diff = nodeIndex = 0) || start.pop()) ) {
+
+								// When found, cache indexes on `parent` and break
+								if ( node.nodeType === 1 && ++diff && node === elem ) {
+									uniqueCache[ type ] = [ dirruns, nodeIndex, diff ];
+									break;
+								}
+							}
+
+						} else {
+							// Use previously-cached element index if available
+							if ( useCache ) {
+								// ...in a gzip-friendly way
+								node = elem;
+								outerCache = node[ expando ] || (node[ expando ] = {});
+
+								// Support: IE <9 only
+								// Defend against cloned attroperties (jQuery gh-1709)
+								uniqueCache = outerCache[ node.uniqueID ] ||
+									(outerCache[ node.uniqueID ] = {});
+
+								cache = uniqueCache[ type ] || [];
+								nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
+								diff = nodeIndex;
+							}
+
+							// xml :nth-child(...)
+							// or :nth-last-child(...) or :nth(-last)?-of-type(...)
+							if ( diff === false ) {
+								// Use the same loop as above to seek `elem` from the start
+								while ( (node = ++nodeIndex && node && node[ dir ] ||
+									(diff = nodeIndex = 0) || start.pop()) ) {
+
+									if ( ( ofType ?
+										node.nodeName.toLowerCase() === name :
+										node.nodeType === 1 ) &&
+										++diff ) {
+
+										// Cache the index of each encountered element
+										if ( useCache ) {
+											outerCache = node[ expando ] || (node[ expando ] = {});
+
+											// Support: IE <9 only
+											// Defend against cloned attroperties (jQuery gh-1709)
+											uniqueCache = outerCache[ node.uniqueID ] ||
+												(outerCache[ node.uniqueID ] = {});
+
+											uniqueCache[ type ] = [ dirruns, diff ];
+										}
+
+										if ( node === elem ) {
+											break;
+										}
+									}
+								}
+							}
+						}
+
+						// Incorporate the offset, then check against cycle size
+						diff -= last;
+						return diff === first || ( diff % first === 0 && diff / first >= 0 );
+					}
+				};
+		},
+
+		"PSEUDO": function( pseudo, argument ) {
+			// pseudo-class names are case-insensitive
+			// http://www.w3.org/TR/selectors/#pseudo-classes
+			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
+			// Remember that setFilters inherits from pseudos
+			var args,
+				fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
+					Sizzle.error( "unsupported pseudo: " + pseudo );
+
+			// The user may use createPseudo to indicate that
+			// arguments are needed to create the filter function
+			// just as Sizzle does
+			if ( fn[ expando ] ) {
+				return fn( argument );
+			}
+
+			// But maintain support for old signatures
+			if ( fn.length > 1 ) {
+				args = [ pseudo, pseudo, "", argument ];
+				return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
+					markFunction(function( seed, matches ) {
+						var idx,
+							matched = fn( seed, argument ),
+							i = matched.length;
+						while ( i-- ) {
+							idx = indexOf( seed, matched[i] );
+							seed[ idx ] = !( matches[ idx ] = matched[i] );
+						}
+					}) :
+					function( elem ) {
+						return fn( elem, 0, args );
+					};
+			}
+
+			return fn;
+		}
+	},
+
+	pseudos: {
+		// Potentially complex pseudos
+		"not": markFunction(function( selector ) {
+			// Trim the selector passed to compile
+			// to avoid treating leading and trailing
+			// spaces as combinators
+			var input = [],
+				results = [],
+				matcher = compile( selector.replace( rtrim, "$1" ) );
+
+			return matcher[ expando ] ?
+				markFunction(function( seed, matches, context, xml ) {
+					var elem,
+						unmatched = matcher( seed, null, xml, [] ),
+						i = seed.length;
+
+					// Match elements unmatched by `matcher`
+					while ( i-- ) {
+						if ( (elem = unmatched[i]) ) {
+							seed[i] = !(matches[i] = elem);
+						}
+					}
+				}) :
+				function( elem, context, xml ) {
+					input[0] = elem;
+					matcher( input, null, xml, results );
+					// Don't keep the element (issue #299)
+					input[0] = null;
+					return !results.pop();
+				};
+		}),
+
+		"has": markFunction(function( selector ) {
+			return function( elem ) {
+				return Sizzle( selector, elem ).length > 0;
+			};
+		}),
+
+		"contains": markFunction(function( text ) {
+			text = text.replace( runescape, funescape );
+			return function( elem ) {
+				return ( elem.textContent || getText( elem ) ).indexOf( text ) > -1;
+			};
+		}),
+
+		// "Whether an element is represented by a :lang() selector
+		// is based solely on the element's language value
+		// being equal to the identifier C,
+		// or beginning with the identifier C immediately followed by "-".
+		// The matching of C against the element's language value is performed case-insensitively.
+		// The identifier C does not have to be a valid language name."
+		// http://www.w3.org/TR/selectors/#lang-pseudo
+		"lang": markFunction( function( lang ) {
+			// lang value must be a valid identifier
+			if ( !ridentifier.test(lang || "") ) {
+				Sizzle.error( "unsupported lang: " + lang );
+			}
+			lang = lang.replace( runescape, funescape ).toLowerCase();
+			return function( elem ) {
+				var elemLang;
+				do {
+					if ( (elemLang = documentIsHTML ?
+						elem.lang :
+						elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
+
+						elemLang = elemLang.toLowerCase();
+						return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
+					}
+				} while ( (elem = elem.parentNode) && elem.nodeType === 1 );
+				return false;
+			};
+		}),
+
+		// Miscellaneous
+		"target": function( elem ) {
+			var hash = window.location && window.location.hash;
+			return hash && hash.slice( 1 ) === elem.id;
+		},
+
+		"root": function( elem ) {
+			return elem === docElem;
+		},
+
+		"focus": function( elem ) {
+			return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
+		},
+
+		// Boolean properties
+		"enabled": createDisabledPseudo( false ),
+		"disabled": createDisabledPseudo( true ),
+
+		"checked": function( elem ) {
+			// In CSS3, :checked should return both checked and selected elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			var nodeName = elem.nodeName.toLowerCase();
+			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
+		},
+
+		"selected": function( elem ) {
+			// Accessing this property makes selected-by-default
+			// options in Safari work properly
+			if ( elem.parentNode ) {
+				elem.parentNode.selectedIndex;
+			}
+
+			return elem.selected === true;
+		},
+
+		// Contents
+		"empty": function( elem ) {
+			// http://www.w3.org/TR/selectors/#empty-pseudo
+			// :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
+			//   but not by others (comment: 8; processing instruction: 7; etc.)
+			// nodeType < 6 works because attributes (2) do not appear as children
+			for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
+				if ( elem.nodeType < 6 ) {
+					return false;
+				}
+			}
+			return true;
+		},
+
+		"parent": function( elem ) {
+			return !Expr.pseudos["empty"]( elem );
+		},
+
+		// Element/input types
+		"header": function( elem ) {
+			return rheader.test( elem.nodeName );
+		},
+
+		"input": function( elem ) {
+			return rinputs.test( elem.nodeName );
+		},
+
+		"button": function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return name === "input" && elem.type === "button" || name === "button";
+		},
+
+		"text": function( elem ) {
+			var attr;
+			return elem.nodeName.toLowerCase() === "input" &&
+				elem.type === "text" &&
+
+				// Support: IE<8
+				// New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
+				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
+		},
+
+		// Position-in-collection
+		"first": createPositionalPseudo(function() {
+			return [ 0 ];
+		}),
+
+		"last": createPositionalPseudo(function( matchIndexes, length ) {
+			return [ length - 1 ];
+		}),
+
+		"eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			return [ argument < 0 ? argument + length : argument ];
+		}),
+
+		"even": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 0;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"odd": createPositionalPseudo(function( matchIndexes, length ) {
+			var i = 1;
+			for ( ; i < length; i += 2 ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ?
+				argument + length :
+				argument > length ?
+					length :
+					argument;
+			for ( ; --i >= 0; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		}),
+
+		"gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
+			var i = argument < 0 ? argument + length : argument;
+			for ( ; ++i < length; ) {
+				matchIndexes.push( i );
+			}
+			return matchIndexes;
+		})
+	}
+};
+
+Expr.pseudos["nth"] = Expr.pseudos["eq"];
+
+// Add button/input type pseudos
+for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
+	Expr.pseudos[ i ] = createInputPseudo( i );
+}
+for ( i in { submit: true, reset: true } ) {
+	Expr.pseudos[ i ] = createButtonPseudo( i );
+}
+
+// Easy API for creating new setFilters
+function setFilters() {}
+setFilters.prototype = Expr.filters = Expr.pseudos;
+Expr.setFilters = new setFilters();
+
+tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
+	var matched, match, tokens, type,
+		soFar, groups, preFilters,
+		cached = tokenCache[ selector + " " ];
+
+	if ( cached ) {
+		return parseOnly ? 0 : cached.slice( 0 );
+	}
+
+	soFar = selector;
+	groups = [];
+	preFilters = Expr.preFilter;
+
+	while ( soFar ) {
+
+		// Comma and first run
+		if ( !matched || (match = rcomma.exec( soFar )) ) {
+			if ( match ) {
+				// Don't consume trailing commas as valid
+				soFar = soFar.slice( match[0].length ) || soFar;
+			}
+			groups.push( (tokens = []) );
+		}
+
+		matched = false;
+
+		// Combinators
+		if ( (match = rcombinators.exec( soFar )) ) {
+			matched = match.shift();
+			tokens.push({
+				value: matched,
+				// Cast descendant combinators to space
+				type: match[0].replace( rtrim, " " )
+			});
+			soFar = soFar.slice( matched.length );
+		}
+
+		// Filters
+		for ( type in Expr.filter ) {
+			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
+				(match = preFilters[ type ]( match ))) ) {
+				matched = match.shift();
+				tokens.push({
+					value: matched,
+					type: type,
+					matches: match
+				});
+				soFar = soFar.slice( matched.length );
+			}
+		}
+
+		if ( !matched ) {
+			break;
+		}
+	}
+
+	// Return the length of the invalid excess
+	// if we're just parsing
+	// Otherwise, throw an error or return tokens
+	return parseOnly ?
+		soFar.length :
+		soFar ?
+			Sizzle.error( selector ) :
+			// Cache the tokens
+			tokenCache( selector, groups ).slice( 0 );
+};
+
+function toSelector( tokens ) {
+	var i = 0,
+		len = tokens.length,
+		selector = "";
+	for ( ; i < len; i++ ) {
+		selector += tokens[i].value;
+	}
+	return selector;
+}
+
+function addCombinator( matcher, combinator, base ) {
+	var dir = combinator.dir,
+		skip = combinator.next,
+		key = skip || dir,
+		checkNonElements = base && key === "parentNode",
+		doneName = done++;
+
+	return combinator.first ?
+		// Check against closest ancestor/preceding element
+		function( elem, context, xml ) {
+			while ( (elem = elem[ dir ]) ) {
+				if ( elem.nodeType === 1 || checkNonElements ) {
+					return matcher( elem, context, xml );
+				}
+			}
+			return false;
+		} :
+
+		// Check against all ancestor/preceding elements
+		function( elem, context, xml ) {
+			var oldCache, uniqueCache, outerCache,
+				newCache = [ dirruns, doneName ];
+
+			// We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching
+			if ( xml ) {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						if ( matcher( elem, context, xml ) ) {
+							return true;
+						}
+					}
+				}
+			} else {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 || checkNonElements ) {
+						outerCache = elem[ expando ] || (elem[ expando ] = {});
+
+						// Support: IE <9 only
+						// Defend against cloned attroperties (jQuery gh-1709)
+						uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
+
+						if ( skip && skip === elem.nodeName.toLowerCase() ) {
+							elem = elem[ dir ] || elem;
+						} else if ( (oldCache = uniqueCache[ key ]) &&
+							oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
+
+							// Assign to newCache so results back-propagate to previous elements
+							return (newCache[ 2 ] = oldCache[ 2 ]);
+						} else {
+							// Reuse newcache so results back-propagate to previous elements
+							uniqueCache[ key ] = newCache;
+
+							// A match means we're done; a fail means we have to keep checking
+							if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
+								return true;
+							}
+						}
+					}
+				}
+			}
+			return false;
+		};
+}
+
+function elementMatcher( matchers ) {
+	return matchers.length > 1 ?
+		function( elem, context, xml ) {
+			var i = matchers.length;
+			while ( i-- ) {
+				if ( !matchers[i]( elem, context, xml ) ) {
+					return false;
+				}
+			}
+			return true;
+		} :
+		matchers[0];
+}
+
+function multipleContexts( selector, contexts, results ) {
+	var i = 0,
+		len = contexts.length;
+	for ( ; i < len; i++ ) {
+		Sizzle( selector, contexts[i], results );
+	}
+	return results;
+}
+
+function condense( unmatched, map, filter, context, xml ) {
+	var elem,
+		newUnmatched = [],
+		i = 0,
+		len = unmatched.length,
+		mapped = map != null;
+
+	for ( ; i < len; i++ ) {
+		if ( (elem = unmatched[i]) ) {
+			if ( !filter || filter( elem, context, xml ) ) {
+				newUnmatched.push( elem );
+				if ( mapped ) {
+					map.push( i );
+				}
+			}
+		}
+	}
+
+	return newUnmatched;
+}
+
+function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
+	if ( postFilter && !postFilter[ expando ] ) {
+		postFilter = setMatcher( postFilter );
+	}
+	if ( postFinder && !postFinder[ expando ] ) {
+		postFinder = setMatcher( postFinder, postSelector );
+	}
+	return markFunction(function( seed, results, context, xml ) {
+		var temp, i, elem,
+			preMap = [],
+			postMap = [],
+			preexisting = results.length,
+
+			// Get initial elements from seed or context
+			elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
+
+			// Prefilter to get matcher input, preserving a map for seed-results synchronization
+			matcherIn = preFilter && ( seed || !selector ) ?
+				condense( elems, preMap, preFilter, context, xml ) :
+				elems,
+
+			matcherOut = matcher ?
+				// If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
+				postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
+
+					// ...intermediate processing is necessary
+					[] :
+
+					// ...otherwise use results directly
+					results :
+				matcherIn;
+
+		// Find primary matches
+		if ( matcher ) {
+			matcher( matcherIn, matcherOut, context, xml );
+		}
+
+		// Apply postFilter
+		if ( postFilter ) {
+			temp = condense( matcherOut, postMap );
+			postFilter( temp, [], context, xml );
+
+			// Un-match failing elements by moving them back to matcherIn
+			i = temp.length;
+			while ( i-- ) {
+				if ( (elem = temp[i]) ) {
+					matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
+				}
+			}
+		}
+
+		if ( seed ) {
+			if ( postFinder || preFilter ) {
+				if ( postFinder ) {
+					// Get the final matcherOut by condensing this intermediate into postFinder contexts
+					temp = [];
+					i = matcherOut.length;
+					while ( i-- ) {
+						if ( (elem = matcherOut[i]) ) {
+							// Restore matcherIn since elem is not yet a final match
+							temp.push( (matcherIn[i] = elem) );
+						}
+					}
+					postFinder( null, (matcherOut = []), temp, xml );
+				}
+
+				// Move matched elements from seed to results to keep them synchronized
+				i = matcherOut.length;
+				while ( i-- ) {
+					if ( (elem = matcherOut[i]) &&
+						(temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
+
+						seed[temp] = !(results[temp] = elem);
+					}
+				}
+			}
+
+		// Add elements to results, through postFinder if defined
+		} else {
+			matcherOut = condense(
+				matcherOut === results ?
+					matcherOut.splice( preexisting, matcherOut.length ) :
+					matcherOut
+			);
+			if ( postFinder ) {
+				postFinder( null, results, matcherOut, xml );
+			} else {
+				push.apply( results, matcherOut );
+			}
+		}
+	});
+}
+
+function matcherFromTokens( tokens ) {
+	var checkContext, matcher, j,
+		len = tokens.length,
+		leadingRelative = Expr.relative[ tokens[0].type ],
+		implicitRelative = leadingRelative || Expr.relative[" "],
+		i = leadingRelative ? 1 : 0,
+
+		// The foundational matcher ensures that elements are reachable from top-level context(s)
+		matchContext = addCombinator( function( elem ) {
+			return elem === checkContext;
+		}, implicitRelative, true ),
+		matchAnyContext = addCombinator( function( elem ) {
+			return indexOf( checkContext, elem ) > -1;
+		}, implicitRelative, true ),
+		matchers = [ function( elem, context, xml ) {
+			var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
+				(checkContext = context).nodeType ?
+					matchContext( elem, context, xml ) :
+					matchAnyContext( elem, context, xml ) );
+			// Avoid hanging onto element (issue #299)
+			checkContext = null;
+			return ret;
+		} ];
+
+	for ( ; i < len; i++ ) {
+		if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
+			matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
+		} else {
+			matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
+
+			// Return special upon seeing a positional matcher
+			if ( matcher[ expando ] ) {
+				// Find the next relative operator (if any) for proper handling
+				j = ++i;
+				for ( ; j < len; j++ ) {
+					if ( Expr.relative[ tokens[j].type ] ) {
+						break;
+					}
+				}
+				return setMatcher(
+					i > 1 && elementMatcher( matchers ),
+					i > 1 && toSelector(
+						// If the preceding token was a descendant combinator, insert an implicit any-element `*`
+						tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
+					).replace( rtrim, "$1" ),
+					matcher,
+					i < j && matcherFromTokens( tokens.slice( i, j ) ),
+					j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
+					j < len && toSelector( tokens )
+				);
+			}
+			matchers.push( matcher );
+		}
+	}
+
+	return elementMatcher( matchers );
+}
+
+function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
+	var bySet = setMatchers.length > 0,
+		byElement = elementMatchers.length > 0,
+		superMatcher = function( seed, context, xml, results, outermost ) {
+			var elem, j, matcher,
+				matchedCount = 0,
+				i = "0",
+				unmatched = seed && [],
+				setMatched = [],
+				contextBackup = outermostContext,
+				// We must always have either seed elements or outermost context
+				elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
+				// Use integer dirruns iff this is the outermost matcher
+				dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
+				len = elems.length;
+
+			if ( outermost ) {
+				outermostContext = context === document || context || outermost;
+			}
+
+			// Add elements passing elementMatchers directly to results
+			// Support: IE<9, Safari
+			// Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
+			for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
+				if ( byElement && elem ) {
+					j = 0;
+					if ( !context && elem.ownerDocument !== document ) {
+						setDocument( elem );
+						xml = !documentIsHTML;
+					}
+					while ( (matcher = elementMatchers[j++]) ) {
+						if ( matcher( elem, context || document, xml) ) {
+							results.push( elem );
+							break;
+						}
+					}
+					if ( outermost ) {
+						dirruns = dirrunsUnique;
+					}
+				}
+
+				// Track unmatched elements for set filters
+				if ( bySet ) {
+					// They will have gone through all possible matchers
+					if ( (elem = !matcher && elem) ) {
+						matchedCount--;
+					}
+
+					// Lengthen the array for every element, matched or not
+					if ( seed ) {
+						unmatched.push( elem );
+					}
+				}
+			}
+
+			// `i` is now the count of elements visited above, and adding it to `matchedCount`
+			// makes the latter nonnegative.
+			matchedCount += i;
+
+			// Apply set filters to unmatched elements
+			// NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`
+			// equals `i`), unless we didn't visit _any_ elements in the above loop because we have
+			// no element matchers and no seed.
+			// Incrementing an initially-string "0" `i` allows `i` to remain a string only in that
+			// case, which will result in a "00" `matchedCount` that differs from `i` but is also
+			// numerically zero.
+			if ( bySet && i !== matchedCount ) {
+				j = 0;
+				while ( (matcher = setMatchers[j++]) ) {
+					matcher( unmatched, setMatched, context, xml );
+				}
+
+				if ( seed ) {
+					// Reintegrate element matches to eliminate the need for sorting
+					if ( matchedCount > 0 ) {
+						while ( i-- ) {
+							if ( !(unmatched[i] || setMatched[i]) ) {
+								setMatched[i] = pop.call( results );
+							}
+						}
+					}
+
+					// Discard index placeholder values to get only actual matches
+					setMatched = condense( setMatched );
+				}
+
+				// Add matches to results
+				push.apply( results, setMatched );
+
+				// Seedless set matches succeeding multiple successful matchers stipulate sorting
+				if ( outermost && !seed && setMatched.length > 0 &&
+					( matchedCount + setMatchers.length ) > 1 ) {
+
+					Sizzle.uniqueSort( results );
+				}
+			}
+
+			// Override manipulation of globals by nested matchers
+			if ( outermost ) {
+				dirruns = dirrunsUnique;
+				outermostContext = contextBackup;
+			}
+
+			return unmatched;
+		};
+
+	return bySet ?
+		markFunction( superMatcher ) :
+		superMatcher;
+}
+
+compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
+	var i,
+		setMatchers = [],
+		elementMatchers = [],
+		cached = compilerCache[ selector + " " ];
+
+	if ( !cached ) {
+		// Generate a function of recursive functions that can be used to check each element
+		if ( !match ) {
+			match = tokenize( selector );
+		}
+		i = match.length;
+		while ( i-- ) {
+			cached = matcherFromTokens( match[i] );
+			if ( cached[ expando ] ) {
+				setMatchers.push( cached );
+			} else {
+				elementMatchers.push( cached );
+			}
+		}
+
+		// Cache the compiled function
+		cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
+
+		// Save selector and tokenization
+		cached.selector = selector;
+	}
+	return cached;
+};
+
+/**
+ * A low-level selection function that works with Sizzle's compiled
+ *  selector functions
+ * @param {String|Function} selector A selector or a pre-compiled
+ *  selector function built with Sizzle.compile
+ * @param {Element} context
+ * @param {Array} [results]
+ * @param {Array} [seed] A set of elements to match against
+ */
+select = Sizzle.select = function( selector, context, results, seed ) {
+	var i, tokens, token, type, find,
+		compiled = typeof selector === "function" && selector,
+		match = !seed && tokenize( (selector = compiled.selector || selector) );
+
+	results = results || [];
+
+	// Try to minimize operations if there is only one selector in the list and no seed
+	// (the latter of which guarantees us context)
+	if ( match.length === 1 ) {
+
+		// Reduce context if the leading compound selector is an ID
+		tokens = match[0] = match[0].slice( 0 );
+		if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
+				context.nodeType === 9 && documentIsHTML && Expr.relative[ tokens[1].type ] ) {
+
+			context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
+			if ( !context ) {
+				return results;
+
+			// Precompiled matchers will still verify ancestry, so step up a level
+			} else if ( compiled ) {
+				context = context.parentNode;
+			}
+
+			selector = selector.slice( tokens.shift().value.length );
+		}
+
+		// Fetch a seed set for right-to-left matching
+		i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
+		while ( i-- ) {
+			token = tokens[i];
+
+			// Abort if we hit a combinator
+			if ( Expr.relative[ (type = token.type) ] ) {
+				break;
+			}
+			if ( (find = Expr.find[ type ]) ) {
+				// Search, expanding context for leading sibling combinators
+				if ( (seed = find(
+					token.matches[0].replace( runescape, funescape ),
+					rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
+				)) ) {
+
+					// If seed is empty or no tokens remain, we can return early
+					tokens.splice( i, 1 );
+					selector = seed.length && toSelector( tokens );
+					if ( !selector ) {
+						push.apply( results, seed );
+						return results;
+					}
+
+					break;
+				}
+			}
+		}
+	}
+
+	// Compile and execute a filtering function if one is not provided
+	// Provide `match` to avoid retokenization if we modified the selector above
+	( compiled || compile( selector, match ) )(
+		seed,
+		context,
+		!documentIsHTML,
+		results,
+		!context || rsibling.test( selector ) && testContext( context.parentNode ) || context
+	);
+	return results;
+};
+
+// One-time assignments
+
+// Sort stability
+support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
+
+// Support: Chrome 14-35+
+// Always assume duplicates if they aren't passed to the comparison function
+support.detectDuplicates = !!hasDuplicate;
+
+// Initialize against the default document
+setDocument();
+
+// Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
+// Detached nodes confoundingly follow *each other*
+support.sortDetached = assert(function( el ) {
+	// Should return 1, but returns 4 (following)
+	return el.compareDocumentPosition( document.createElement("fieldset") ) & 1;
+});
+
+// Support: IE<8
+// Prevent attribute/property "interpolation"
+// https://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
+if ( !assert(function( el ) {
+	el.innerHTML = "<a href='#'></a>";
+	return el.firstChild.getAttribute("href") === "#" ;
+}) ) {
+	addHandle( "type|href|height|width", function( elem, name, isXML ) {
+		if ( !isXML ) {
+			return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
+		}
+	});
+}
+
+// Support: IE<9
+// Use defaultValue in place of getAttribute("value")
+if ( !support.attributes || !assert(function( el ) {
+	el.innerHTML = "<input/>";
+	el.firstChild.setAttribute( "value", "" );
+	return el.firstChild.getAttribute( "value" ) === "";
+}) ) {
+	addHandle( "value", function( elem, name, isXML ) {
+		if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
+			return elem.defaultValue;
+		}
+	});
+}
+
+// Support: IE<9
+// Use getAttributeNode to fetch booleans when getAttribute lies
+if ( !assert(function( el ) {
+	return el.getAttribute("disabled") == null;
+}) ) {
+	addHandle( booleans, function( elem, name, isXML ) {
+		var val;
+		if ( !isXML ) {
+			return elem[ name ] === true ? name.toLowerCase() :
+					(val = elem.getAttributeNode( name )) && val.specified ?
+					val.value :
+				null;
+		}
+	});
+}
+
+return Sizzle;
+
+})( window );
+
+
+
+jQuery.find = Sizzle;
+jQuery.expr = Sizzle.selectors;
+
+// Deprecated
+jQuery.expr[ ":" ] = jQuery.expr.pseudos;
+jQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;
+jQuery.text = Sizzle.getText;
+jQuery.isXMLDoc = Sizzle.isXML;
+jQuery.contains = Sizzle.contains;
+jQuery.escapeSelector = Sizzle.escape;
+
+
+
+
+var dir = function( elem, dir, until ) {
+	var matched = [],
+		truncate = until !== undefined;
+
+	while ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {
+		if ( elem.nodeType === 1 ) {
+			if ( truncate && jQuery( elem ).is( until ) ) {
+				break;
+			}
+			matched.push( elem );
+		}
+	}
+	return matched;
+};
+
+
+var siblings = function( n, elem ) {
+	var matched = [];
+
+	for ( ; n; n = n.nextSibling ) {
+		if ( n.nodeType === 1 && n !== elem ) {
+			matched.push( n );
+		}
+	}
+
+	return matched;
+};
+
+
+var rneedsContext = jQuery.expr.match.needsContext;
+
+
+
+function nodeName( elem, name ) {
+
+  return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
+
+};
+var rsingleTag = ( /^<([a-z][^\/\0>:\x20\t\r\n\f]*)[\x20\t\r\n\f]*\/?>(?:<\/\1>|)$/i );
+
+
+
+// Implement the identical functionality for filter and not
+function winnow( elements, qualifier, not ) {
+	if ( isFunction( qualifier ) ) {
+		return jQuery.grep( elements, function( elem, i ) {
+			return !!qualifier.call( elem, i, elem ) !== not;
+		} );
+	}
+
+	// Single element
+	if ( qualifier.nodeType ) {
+		return jQuery.grep( elements, function( elem ) {
+			return ( elem === qualifier ) !== not;
+		} );
+	}
+
+	// Arraylike of elements (jQuery, arguments, Array)
+	if ( typeof qualifier !== "string" ) {
+		return jQuery.grep( elements, function( elem ) {
+			return ( indexOf.call( qualifier, elem ) > -1 ) !== not;
+		} );
+	}
+
+	// Filtered directly for both simple and complex selectors
+	return jQuery.filter( qualifier, elements, not );
+}
+
+jQuery.filter = function( expr, elems, not ) {
+	var elem = elems[ 0 ];
+
+	if ( not ) {
+		expr = ":not(" + expr + ")";
+	}
+
+	if ( elems.length === 1 && elem.nodeType === 1 ) {
+		return jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [];
+	}
+
+	return jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
+		return elem.nodeType === 1;
+	} ) );
+};
+
+jQuery.fn.extend( {
+	find: function( selector ) {
+		var i, ret,
+			len = this.length,
+			self = this;
+
+		if ( typeof selector !== "string" ) {
+			return this.pushStack( jQuery( selector ).filter( function() {
+				for ( i = 0; i < len; i++ ) {
+					if ( jQuery.contains( self[ i ], this ) ) {
+						return true;
+					}
+				}
+			} ) );
+		}
+
+		ret = this.pushStack( [] );
+
+		for ( i = 0; i < len; i++ ) {
+			jQuery.find( selector, self[ i ], ret );
+		}
+
+		return len > 1 ? jQuery.uniqueSort( ret ) : ret;
+	},
+	filter: function( selector ) {
+		return this.pushStack( winnow( this, selector || [], false ) );
+	},
+	not: function( selector ) {
+		return this.pushStack( winnow( this, selector || [], true ) );
+	},
+	is: function( selector ) {
+		return !!winnow(
+			this,
+
+			// If this is a positional/relative selector, check membership in the returned set
+			// so $("p:first").is("p:last") won't return true for a doc with two "p".
+			typeof selector === "string" && rneedsContext.test( selector ) ?
+				jQuery( selector ) :
+				selector || [],
+			false
+		).length;
+	}
+} );
+
+
+// Initialize a jQuery object
+
+
+// A central reference to the root jQuery(document)
+var rootjQuery,
+
+	// A simple way to check for HTML strings
+	// Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
+	// Strict HTML recognition (#11290: must start with <)
+	// Shortcut simple #id case for speed
+	rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]+))$/,
+
+	init = jQuery.fn.init = function( selector, context, root ) {
+		var match, elem;
+
+		// HANDLE: $(""), $(null), $(undefined), $(false)
+		if ( !selector ) {
+			return this;
+		}
+
+		// Method init() accepts an alternate rootjQuery
+		// so migrate can support jQuery.sub (gh-2101)
+		root = root || rootjQuery;
+
+		// Handle HTML strings
+		if ( typeof selector === "string" ) {
+			if ( selector[ 0 ] === "<" &&
+				selector[ selector.length - 1 ] === ">" &&
+				selector.length >= 3 ) {
+
+				// Assume that strings that start and end with <> are HTML and skip the regex check
+				match = [ null, selector, null ];
+
+			} else {
+				match = rquickExpr.exec( selector );
+			}
+
+			// Match html or make sure no context is specified for #id
+			if ( match && ( match[ 1 ] || !context ) ) {
+
+				// HANDLE: $(html) -> $(array)
+				if ( match[ 1 ] ) {
+					context = context instanceof jQuery ? context[ 0 ] : context;
+
+					// Option to run scripts is true for back-compat
+					// Intentionally let the error be thrown if parseHTML is not present
+					jQuery.merge( this, jQuery.parseHTML(
+						match[ 1 ],
+						context && context.nodeType ? context.ownerDocument || context : document,
+						true
+					) );
+
+					// HANDLE: $(html, props)
+					if ( rsingleTag.test( match[ 1 ] ) && jQuery.isPlainObject( context ) ) {
+						for ( match in context ) {
+
+							// Properties of context are called as methods if possible
+							if ( isFunction( this[ match ] ) ) {
+								this[ match ]( context[ match ] );
+
+							// ...and otherwise set as attributes
+							} else {
+								this.attr( match, context[ match ] );
+							}
+						}
+					}
+
+					return this;
+
+				// HANDLE: $(#id)
+				} else {
+					elem = document.getElementById( match[ 2 ] );
+
+					if ( elem ) {
+
+						// Inject the element directly into the jQuery object
+						this[ 0 ] = elem;
+						this.length = 1;
+					}
+					return this;
+				}
+
+			// HANDLE: $(expr, $(...))
+			} else if ( !context || context.jquery ) {
+				return ( context || root ).find( selector );
+
+			// HANDLE: $(expr, context)
+			// (which is just equivalent to: $(context).find(expr)
+			} else {
+				return this.constructor( context ).find( selector );
+			}
+
+		// HANDLE: $(DOMElement)
+		} else if ( selector.nodeType ) {
+			this[ 0 ] = selector;
+			this.length = 1;
+			return this;
+
+		// HANDLE: $(function)
+		// Shortcut for document ready
+		} else if ( isFunction( selector ) ) {
+			return root.ready !== undefined ?
+				root.ready( selector ) :
+
+				// Execute immediately if ready is not present
+				selector( jQuery );
+		}
+
+		return jQuery.makeArray( selector, this );
+	};
+
+// Give the init function the jQuery prototype for later instantiation
+init.prototype = jQuery.fn;
+
+// Initialize central reference
+rootjQuery = jQuery( document );
+
+
+var rparentsprev = /^(?:parents|prev(?:Until|All))/,
+
+	// Methods guaranteed to produce a unique set when starting from a unique set
+	guaranteedUnique = {
+		children: true,
+		contents: true,
+		next: true,
+		prev: true
+	};
+
+jQuery.fn.extend( {
+	has: function( target ) {
+		var targets = jQuery( target, this ),
+			l = targets.length;
+
+		return this.filter( function() {
+			var i = 0;
+			for ( ; i < l; i++ ) {
+				if ( jQuery.contains( this, targets[ i ] ) ) {
+					return true;
+				}
+			}
+		} );
+	},
+
+	closest: function( selectors, context ) {
+		var cur,
+			i = 0,
+			l = this.length,
+			matched = [],
+			targets = typeof selectors !== "string" && jQuery( selectors );
+
+		// Positional selectors never match, since there's no _selection_ context
+		if ( !rneedsContext.test( selectors ) ) {
+			for ( ; i < l; i++ ) {
+				for ( cur = this[ i ]; cur && cur !== context; cur = cur.parentNode ) {
+
+					// Always skip document fragments
+					if ( cur.nodeType < 11 && ( targets ?
+						targets.index( cur ) > -1 :
+
+						// Don't pass non-elements to Sizzle
+						cur.nodeType === 1 &&
+							jQuery.find.matchesSelector( cur, selectors ) ) ) {
+
+						matched.push( cur );
+						break;
+					}
+				}
+			}
+		}
+
+		return this.pushStack( matched.length > 1 ? jQuery.uniqueSort( matched ) : matched );
+	},
+
+	// Determine the position of an element within the set
+	index: function( elem ) {
+
+		// No argument, return index in parent
+		if ( !elem ) {
+			return ( this[ 0 ] && this[ 0 ].parentNode ) ? this.first().prevAll().length : -1;
+		}
+
+		// Index in selector
+		if ( typeof elem === "string" ) {
+			return indexOf.call( jQuery( elem ), this[ 0 ] );
+		}
+
+		// Locate the position of the desired element
+		return indexOf.call( this,
+
+			// If it receives a jQuery object, the first element is used
+			elem.jquery ? elem[ 0 ] : elem
+		);
+	},
+
+	add: function( selector, context ) {
+		return this.pushStack(
+			jQuery.uniqueSort(
+				jQuery.merge( this.get(), jQuery( selector, context ) )
+			)
+		);
+	},
+
+	addBack: function( selector ) {
+		return this.add( selector == null ?
+			this.prevObject : this.prevObject.filter( selector )
+		);
+	}
+} );
+
+function sibling( cur, dir ) {
+	while ( ( cur = cur[ dir ] ) && cur.nodeType !== 1 ) {}
+	return cur;
+}
+
+jQuery.each( {
+	parent: function( elem ) {
+		var parent = elem.parentNode;
+		return parent && parent.nodeType !== 11 ? parent : null;
+	},
+	parents: function( elem ) {
+		return dir( elem, "parentNode" );
+	},
+	parentsUntil: function( elem, i, until ) {
+		return dir( elem, "parentNode", until );
+	},
+	next: function( elem ) {
+		return sibling( elem, "nextSibling" );
+	},
+	prev: function( elem ) {
+		return sibling( elem, "previousSibling" );
+	},
+	nextAll: function( elem ) {
+		return dir( elem, "nextSibling" );
+	},
+	prevAll: function( elem ) {
+		return dir( elem, "previousSibling" );
+	},
+	nextUntil: function( elem, i, until ) {
+		return dir( elem, "nextSibling", until );
+	},
+	prevUntil: function( elem, i, until ) {
+		return dir( elem, "previousSibling", until );
+	},
+	siblings: function( elem ) {
+		return siblings( ( elem.parentNode || {} ).firstChild, elem );
+	},
+	children: function( elem ) {
+		return siblings( elem.firstChild );
+	},
+	contents: function( elem ) {
+		if ( typeof elem.contentDocument !== "undefined" ) {
+			return elem.contentDocument;
+		}
+
+		// Support: IE 9 - 11 only, iOS 7 only, Android Browser <=4.3 only
+		// Treat the template element as a regular one in browsers that
+		// don't support it.
+		if ( nodeName( elem, "template" ) ) {
+			elem = elem.content || elem;
+		}
+
+		return jQuery.merge( [], elem.childNodes );
+	}
+}, function( name, fn ) {
+	jQuery.fn[ name ] = function( until, selector ) {
+		var matched = jQuery.map( this, fn, until );
+
+		if ( name.slice( -5 ) !== "Until" ) {
+			selector = until;
+		}
+
+		if ( selector && typeof selector === "string" ) {
+			matched = jQuery.filter( selector, matched );
+		}
+
+		if ( this.length > 1 ) {
+
+			// Remove duplicates
+			if ( !guaranteedUnique[ name ] ) {
+				jQuery.uniqueSort( matched );
+			}
+
+			// Reverse order for parents* and prev-derivatives
+			if ( rparentsprev.test( name ) ) {
+				matched.reverse();
+			}
+		}
+
+		return this.pushStack( matched );
+	};
+} );
+var rnothtmlwhite = ( /[^\x20\t\r\n\f]+/g );
+
+
+
+// Convert String-formatted options into Object-formatted ones
+function createOptions( options ) {
+	var object = {};
+	jQuery.each( options.match( rnothtmlwhite ) || [], function( _, flag ) {
+		object[ flag ] = true;
+	} );
+	return object;
+}
+
+/*
+ * Create a callback list using the following parameters:
+ *
+ *	options: an optional list of space-separated options that will change how
+ *			the callback list behaves or a more traditional option object
+ *
+ * By default a callback list will act like an event callback list and can be
+ * "fired" multiple times.
+ *
+ * Possible options:
+ *
+ *	once:			will ensure the callback list can only be fired once (like a Deferred)
+ *
+ *	memory:			will keep track of previous values and will call any callback added
+ *					after the list has been fired right away with the latest "memorized"
+ *					values (like a Deferred)
+ *
+ *	unique:			will ensure a callback can only be added once (no duplicate in the list)
+ *
+ *	stopOnFalse:	interrupt callings when a callback returns false
+ *
+ */
+jQuery.Callbacks = function( options ) {
+
+	// Convert options from String-formatted to Object-formatted if needed
+	// (we check in cache first)
+	options = typeof options === "string" ?
+		createOptions( options ) :
+		jQuery.extend( {}, options );
+
+	var // Flag to know if list is currently firing
+		firing,
+
+		// Last fire value for non-forgettable lists
+		memory,
+
+		// Flag to know if list was already fired
+		fired,
+
+		// Flag to prevent firing
+		locked,
+
+		// Actual callback list
+		list = [],
+
+		// Queue of execution data for repeatable lists
+		queue = [],
+
+		// Index of currently firing callback (modified by add/remove as needed)
+		firingIndex = -1,
+
+		// Fire callbacks
+		fire = function() {
+
+			// Enforce single-firing
+			locked = locked || options.once;
+
+			// Execute callbacks for all pending executions,
+			// respecting firingIndex overrides and runtime changes
+			fired = firing = true;
+			for ( ; queue.length; firingIndex = -1 ) {
+				memory = queue.shift();
+				while ( ++firingIndex < list.length ) {
+
+					// Run callback and check for early termination
+					if ( list[ firingIndex ].apply( memory[ 0 ], memory[ 1 ] ) === false &&
+						options.stopOnFalse ) {
+
+						// Jump to end and forget the data so .add doesn't re-fire
+						firingIndex = list.length;
+						memory = false;
+					}
+				}
+			}
+
+			// Forget the data if we're done with it
+			if ( !options.memory ) {
+				memory = false;
+			}
+
+			firing = false;
+
+			// Clean up if we're done firing for good
+			if ( locked ) {
+
+				// Keep an empty list if we have data for future add calls
+				if ( memory ) {
+					list = [];
+
+				// Otherwise, this object is spent
+				} else {
+					list = "";
+				}
+			}
+		},
+
+		// Actual Callbacks object
+		self = {
+
+			// Add a callback or a collection of callbacks to the list
+			add: function() {
+				if ( list ) {
+
+					// If we have memory from a past run, we should fire after adding
+					if ( memory && !firing ) {
+						firingIndex = list.length - 1;
+						queue.push( memory );
+					}
+
+					( function add( args ) {
+						jQuery.each( args, function( _, arg ) {
+							if ( isFunction( arg ) ) {
+								if ( !options.unique || !self.has( arg ) ) {
+									list.push( arg );
+								}
+							} else if ( arg && arg.length && toType( arg ) !== "string" ) {
+
+								// Inspect recursively
+								add( arg );
+							}
+						} );
+					} )( arguments );
+
+					if ( memory && !firing ) {
+						fire();
+					}
+				}
+				return this;
+			},
+
+			// Remove a callback from the list
+			remove: function() {
+				jQuery.each( arguments, function( _, arg ) {
+					var index;
+					while ( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
+						list.splice( index, 1 );
+
+						// Handle firing indexes
+						if ( index <= firingIndex ) {
+							firingIndex--;
+						}
+					}
+				} );
+				return this;
+			},
+
+			// Check if a given callback is in the list.
+			// If no argument is given, return whether or not list has callbacks attached.
+			has: function( fn ) {
+				return fn ?
+					jQuery.inArray( fn, list ) > -1 :
+					list.length > 0;
+			},
+
+			// Remove all callbacks from the list
+			empty: function() {
+				if ( list ) {
+					list = [];
+				}
+				return this;
+			},
+
+			// Disable .fire and .add
+			// Abort any current/pending executions
+			// Clear all callbacks and values
+			disable: function() {
+				locked = queue = [];
+				list = memory = "";
+				return this;
+			},
+			disabled: function() {
+				return !list;
+			},
+
+			// Disable .fire
+			// Also disable .add unless we have memory (since it would have no effect)
+			// Abort any pending executions
+			lock: function() {
+				locked = queue = [];
+				if ( !memory && !firing ) {
+					list = memory = "";
+				}
+				return this;
+			},
+			locked: function() {
+				return !!locked;
+			},
+
+			// Call all callbacks with the given context and arguments
+			fireWith: function( context, args ) {
+				if ( !locked ) {
+					args = args || [];
+					args = [ context, args.slice ? args.slice() : args ];
+					queue.push( args );
+					if ( !firing ) {
+						fire();
+					}
+				}
+				return this;
+			},
+
+			// Call all the callbacks with the given arguments
+			fire: function() {
+				self.fireWith( this, arguments );
+				return this;
+			},
+
+			// To know if the callbacks have already been called at least once
+			fired: function() {
+				return !!fired;
+			}
+		};
+
+	return self;
+};
+
+
+function Identity( v ) {
+	return v;
+}
+function Thrower( ex ) {
+	throw ex;
+}
+
+function adoptValue( value, resolve, reject, noValue ) {
+	var method;
+
+	try {
+
+		// Check for promise aspect first to privilege synchronous behavior
+		if ( value && isFunction( ( method = value.promise ) ) ) {
+			method.call( value ).done( resolve ).fail( reject );
+
+		// Other thenables
+		} else if ( value && isFunction( ( method = value.then ) ) ) {
+			method.call( value, resolve, reject );
+
+		// Other non-thenables
+		} else {
+
+			// Control `resolve` arguments by letting Array#slice cast boolean `noValue` to integer:
+			// * false: [ value ].slice( 0 ) => resolve( value )
+			// * true: [ value ].slice( 1 ) => resolve()
+			resolve.apply( undefined, [ value ].slice( noValue ) );
+		}
+
+	// For Promises/A+, convert exceptions into rejections
+	// Since jQuery.when doesn't unwrap thenables, we can skip the extra checks appearing in
+	// Deferred#then to conditionally suppress rejection.
+	} catch ( value ) {
+
+		// Support: Android 4.0 only
+		// Strict mode functions invoked without .call/.apply get global-object context
+		reject.apply( undefined, [ value ] );
+	}
+}
+
+jQuery.extend( {
+
+	Deferred: function( func ) {
+		var tuples = [
+
+				// action, add listener, callbacks,
+				// ... .then handlers, argument index, [final state]
+				[ "notify", "progress", jQuery.Callbacks( "memory" ),
+					jQuery.Callbacks( "memory" ), 2 ],
+				[ "resolve", "done", jQuery.Callbacks( "once memory" ),
+					jQuery.Callbacks( "once memory" ), 0, "resolved" ],
+				[ "reject", "fail", jQuery.Callbacks( "once memory" ),
+					jQuery.Callbacks( "once memory" ), 1, "rejected" ]
+			],
+			state = "pending",
+			promise = {
+				state: function() {
+					return state;
+				},
+				always: function() {
+					deferred.done( arguments ).fail( arguments );
+					return this;
+				},
+				"catch": function( fn ) {
+					return promise.then( null, fn );
+				},
+
+				// Keep pipe for back-compat
+				pipe: function( /* fnDone, fnFail, fnProgress */ ) {
+					var fns = arguments;
+
+					return jQuery.Deferred( function( newDefer ) {
+						jQuery.each( tuples, function( i, tuple ) {
+
+							// Map tuples (progress, done, fail) to arguments (done, fail, progress)
+							var fn = isFunction( fns[ tuple[ 4 ] ] ) && fns[ tuple[ 4 ] ];
+
+							// deferred.progress(function() { bind to newDefer or newDefer.notify })
+							// deferred.done(function() { bind to newDefer or newDefer.resolve })
+							// deferred.fail(function() { bind to newDefer or newDefer.reject })
+							deferred[ tuple[ 1 ] ]( function() {
+								var returned = fn && fn.apply( this, arguments );
+								if ( returned && isFunction( returned.promise ) ) {
+									returned.promise()
+										.progress( newDefer.notify )
+										.done( newDefer.resolve )
+										.fail( newDefer.reject );
+								} else {
+									newDefer[ tuple[ 0 ] + "With" ](
+										this,
+										fn ? [ returned ] : arguments
+									);
+								}
+							} );
+						} );
+						fns = null;
+					} ).promise();
+				},
+				then: function( onFulfilled, onRejected, onProgress ) {
+					var maxDepth = 0;
+					function resolve( depth, deferred, handler, special ) {
+						return function() {
+							var that = this,
+								args = arguments,
+								mightThrow = function() {
+									var returned, then;
+
+									// Support: Promises/A+ section 2.3.3.3.3
+									// https://promisesaplus.com/#point-59
+									// Ignore double-resolution attempts
+									if ( depth < maxDepth ) {
+										return;
+									}
+
+									returned = handler.apply( that, args );
+
+									// Support: Promises/A+ section 2.3.1
+									// https://promisesaplus.com/#point-48
+									if ( returned === deferred.promise() ) {
+										throw new TypeError( "Thenable self-resolution" );
+									}
+
+									// Support: Promises/A+ sections 2.3.3.1, 3.5
+									// https://promisesaplus.com/#point-54
+									// https://promisesaplus.com/#point-75
+									// Retrieve `then` only once
+									then = returned &&
+
+										// Support: Promises/A+ section 2.3.4
+										// https://promisesaplus.com/#point-64
+										// Only check objects and functions for thenability
+										( typeof returned === "object" ||
+											typeof returned === "function" ) &&
+										returned.then;
+
+									// Handle a returned thenable
+									if ( isFunction( then ) ) {
+
+										// Special processors (notify) just wait for resolution
+										if ( special ) {
+											then.call(
+												returned,
+												resolve( maxDepth, deferred, Identity, special ),
+												resolve( maxDepth, deferred, Thrower, special )
+											);
+
+										// Normal processors (resolve) also hook into progress
+										} else {
+
+											// ...and disregard older resolution values
+											maxDepth++;
+
+											then.call(
+												returned,
+												resolve( maxDepth, deferred, Identity, special ),
+												resolve( maxDepth, deferred, Thrower, special ),
+												resolve( maxDepth, deferred, Identity,
+													deferred.notifyWith )
+											);
+										}
+
+									// Handle all other returned values
+									} else {
+
+										// Only substitute handlers pass on context
+										// and multiple values (non-spec behavior)
+										if ( handler !== Identity ) {
+											that = undefined;
+											args = [ returned ];
+										}
+
+										// Process the value(s)
+										// Default process is resolve
+										( special || deferred.resolveWith )( that, args );
+									}
+								},
+
+								// Only normal processors (resolve) catch and reject exceptions
+								process = special ?
+									mightThrow :
+									function() {
+										try {
+											mightThrow();
+										} catch ( e ) {
+
+											if ( jQuery.Deferred.exceptionHook ) {
+												jQuery.Deferred.exceptionHook( e,
+													process.stackTrace );
+											}
+
+											// Support: Promises/A+ section 2.3.3.3.4.1
+											// https://promisesaplus.com/#point-61
+											// Ignore post-resolution exceptions
+											if ( depth + 1 >= maxDepth ) {
+
+												// Only substitute handlers pass on context
+												// and multiple values (non-spec behavior)
+												if ( handler !== Thrower ) {
+													that = undefined;
+													args = [ e ];
+												}
+
+												deferred.rejectWith( that, args );
+											}
+										}
+									};
+
+							// Support: Promises/A+ section 2.3.3.3.1
+							// https://promisesaplus.com/#point-57
+							// Re-resolve promises immediately to dodge false rejection from
+							// subsequent errors
+							if ( depth ) {
+								process();
+							} else {
+
+								// Call an optional hook to record the stack, in case of exception
+								// since it's otherwise lost when execution goes async
+								if ( jQuery.Deferred.getStackHook ) {
+									process.stackTrace = jQuery.Deferred.getStackHook();
+								}
+								window.setTimeout( process );
+							}
+						};
+					}
+
+					return jQuery.Deferred( function( newDefer ) {
+
+						// progress_handlers.add( ... )
+						tuples[ 0 ][ 3 ].add(
+							resolve(
+								0,
+								newDefer,
+								isFunction( onProgress ) ?
+									onProgress :
+									Identity,
+								newDefer.notifyWith
+							)
+						);
+
+						// fulfilled_handlers.add( ... )
+						tuples[ 1 ][ 3 ].add(
+							resolve(
+								0,
+								newDefer,
+								isFunction( onFulfilled ) ?
+									onFulfilled :
+									Identity
+							)
+						);
+
+						// rejected_handlers.add( ... )
+						tuples[ 2 ][ 3 ].add(
+							resolve(
+								0,
+								newDefer,
+								isFunction( onRejected ) ?
+									onRejected :
+									Thrower
+							)
+						);
+					} ).promise();
+				},
+
+				// Get a promise for this deferred
+				// If obj is provided, the promise aspect is added to the object
+				promise: function( obj ) {
+					return obj != null ? jQuery.extend( obj, promise ) : promise;
+				}
+			},
+			deferred = {};
+
+		// Add list-specific methods
+		jQuery.each( tuples, function( i, tuple ) {
+			var list = tuple[ 2 ],
+				stateString = tuple[ 5 ];
+
+			// promise.progress = list.add
+			// promise.done = list.add
+			// promise.fail = list.add
+			promise[ tuple[ 1 ] ] = list.add;
+
+			// Handle state
+			if ( stateString ) {
+				list.add(
+					function() {
+
+						// state = "resolved" (i.e., fulfilled)
+						// state = "rejected"
+						state = stateString;
+					},
+
+					// rejected_callbacks.disable
+					// fulfilled_callbacks.disable
+					tuples[ 3 - i ][ 2 ].disable,
+
+					// rejected_handlers.disable
+					// fulfilled_handlers.disable
+					tuples[ 3 - i ][ 3 ].disable,
+
+					// progress_callbacks.lock
+					tuples[ 0 ][ 2 ].lock,
+
+					// progress_handlers.lock
+					tuples[ 0 ][ 3 ].lock
+				);
+			}
+
+			// progress_handlers.fire
+			// fulfilled_handlers.fire
+			// rejected_handlers.fire
+			list.add( tuple[ 3 ].fire );
+
+			// deferred.notify = function() { deferred.notifyWith(...) }
+			// deferred.resolve = function() { deferred.resolveWith(...) }
+			// deferred.reject = function() { deferred.rejectWith(...) }
+			deferred[ tuple[ 0 ] ] = function() {
+				deferred[ tuple[ 0 ] + "With" ]( this === deferred ? undefined : this, arguments );
+				return this;
+			};
+
+			// deferred.notifyWith = list.fireWith
+			// deferred.resolveWith = list.fireWith
+			// deferred.rejectWith = list.fireWith
+			deferred[ tuple[ 0 ] + "With" ] = list.fireWith;
+		} );
+
+		// Make the deferred a promise
+		promise.promise( deferred );
+
+		// Call given func if any
+		if ( func ) {
+			func.call( deferred, deferred );
+		}
+
+		// All done!
+		return deferred;
+	},
+
+	// Deferred helper
+	when: function( singleValue ) {
+		var
+
+			// count of uncompleted subordinates
+			remaining = arguments.length,
+
+			// count of unprocessed arguments
+			i = remaining,
+
+			// subordinate fulfillment data
+			resolveContexts = Array( i ),
+			resolveValues = slice.call( arguments ),
+
+			// the master Deferred
+			master = jQuery.Deferred(),
+
+			// subordinate callback factory
+			updateFunc = function( i ) {
+				return function( value ) {
+					resolveContexts[ i ] = this;
+					resolveValues[ i ] = arguments.length > 1 ? slice.call( arguments ) : value;
+					if ( !( --remaining ) ) {
+						master.resolveWith( resolveContexts, resolveValues );
+					}
+				};
+			};
+
+		// Single- and empty arguments are adopted like Promise.resolve
+		if ( remaining <= 1 ) {
+			adoptValue( singleValue, master.done( updateFunc( i ) ).resolve, master.reject,
+				!remaining );
+
+			// Use .then() to unwrap secondary thenables (cf. gh-3000)
+			if ( master.state() === "pending" ||
+				isFunction( resolveValues[ i ] && resolveValues[ i ].then ) ) {
+
+				return master.then();
+			}
+		}
+
+		// Multiple arguments are aggregated like Promise.all array elements
+		while ( i-- ) {
+			adoptValue( resolveValues[ i ], updateFunc( i ), master.reject );
+		}
+
+		return master.promise();
+	}
+} );
+
+
+// These usually indicate a programmer mistake during development,
+// warn about them ASAP rather than swallowing them by default.
+var rerrorNames = /^(Eval|Internal|Range|Reference|Syntax|Type|URI)Error$/;
+
+jQuery.Deferred.exceptionHook = function( error, stack ) {
+
+	// Support: IE 8 - 9 only
+	// Console exists when dev tools are open, which can happen at any time
+	if ( window.console && window.console.warn && error && rerrorNames.test( error.name ) ) {
+		window.console.warn( "jQuery.Deferred exception: " + error.message, error.stack, stack );
+	}
+};
+
+
+
+
+jQuery.readyException = function( error ) {
+	window.setTimeout( function() {
+		throw error;
+	} );
+};
+
+
+
+
+// The deferred used on DOM ready
+var readyList = jQuery.Deferred();
+
+jQuery.fn.ready = function( fn ) {
+
+	readyList
+		.then( fn )
+
+		// Wrap jQuery.readyException in a function so that the lookup
+		// happens at the time of error handling instead of callback
+		// registration.
+		.catch( function( error ) {
+			jQuery.readyException( error );
+		} );
+
+	return this;
+};
+
+jQuery.extend( {
+
+	// Is the DOM ready to be used? Set to true once it occurs.
+	isReady: false,
+
+	// A counter to track how many items to wait for before
+	// the ready event fires. See #6781
+	readyWait: 1,
+
+	// Handle when the DOM is ready
+	ready: function( wait ) {
+
+		// Abort if there are pending holds or we're already ready
+		if ( wait === true ? --jQuery.readyWait : jQuery.isReady ) {
+			return;
+		}
+
+		// Remember that the DOM is ready
+		jQuery.isReady = true;
+
+		// If a normal DOM Ready event fired, decrement, and wait if need be
+		if ( wait !== true && --jQuery.readyWait > 0 ) {
+			return;
+		}
+
+		// If there are functions bound, to execute
+		readyList.resolveWith( document, [ jQuery ] );
+	}
+} );
+
+jQuery.ready.then = readyList.then;
+
+// The ready event handler and self cleanup method
+function completed() {
+	document.removeEventListener( "DOMContentLoaded", completed );
+	window.removeEventListener( "load", completed );
+	jQuery.ready();
+}
+
+// Catch cases where $(document).ready() is called
+// after the browser event has already occurred.
+// Support: IE <=9 - 10 only
+// Older IE sometimes signals "interactive" too soon
+if ( document.readyState === "complete" ||
+	( document.readyState !== "loading" && !document.documentElement.doScroll ) ) {
+
+	// Handle it asynchronously to allow scripts the opportunity to delay ready
+	window.setTimeout( jQuery.ready );
+
+} else {
+
+	// Use the handy event callback
+	document.addEventListener( "DOMContentLoaded", completed );
+
+	// A fallback to window.onload, that will always work
+	window.addEventListener( "load", completed );
+}
+
+
+
+
+// Multifunctional method to get and set values of a collection
+// The value/s can optionally be executed if it's a function
+var access = function( elems, fn, key, value, chainable, emptyGet, raw ) {
+	var i = 0,
+		len = elems.length,
+		bulk = key == null;
+
+	// Sets many values
+	if ( toType( key ) === "object" ) {
+		chainable = true;
+		for ( i in key ) {
+			access( elems, fn, i, key[ i ], true, emptyGet, raw );
+		}
+
+	// Sets one value
+	} else if ( value !== undefined ) {
+		chainable = true;
+
+		if ( !isFunction( value ) ) {
+			raw = true;
+		}
+
+		if ( bulk ) {
+
+			// Bulk operations run against the entire set
+			if ( raw ) {
+				fn.call( elems, value );
+				fn = null;
+
+			// ...except when executing function values
+			} else {
+				bulk = fn;
+				fn = function( elem, key, value ) {
+					return bulk.call( jQuery( elem ), value );
+				};
+			}
+		}
+
+		if ( fn ) {
+			for ( ; i < len; i++ ) {
+				fn(
+					elems[ i ], key, raw ?
+					value :
+					value.call( elems[ i ], i, fn( elems[ i ], key ) )
+				);
+			}
+		}
+	}
+
+	if ( chainable ) {
+		return elems;
+	}
+
+	// Gets
+	if ( bulk ) {
+		return fn.call( elems );
+	}
+
+	return len ? fn( elems[ 0 ], key ) : emptyGet;
+};
+
+
+// Matches dashed string for camelizing
+var rmsPrefix = /^-ms-/,
+	rdashAlpha = /-([a-z])/g;
+
+// Used by camelCase as callback to replace()
+function fcamelCase( all, letter ) {
+	return letter.toUpperCase();
+}
+
+// Convert dashed to camelCase; used by the css and data modules
+// Support: IE <=9 - 11, Edge 12 - 15
+// Microsoft forgot to hump their vendor prefix (#9572)
+function camelCase( string ) {
+	return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
+}
+var acceptData = function( owner ) {
+
+	// Accepts only:
+	//  - Node
+	//    - Node.ELEMENT_NODE
+	//    - Node.DOCUMENT_NODE
+	//  - Object
+	//    - Any
+	return owner.nodeType === 1 || owner.nodeType === 9 || !( +owner.nodeType );
+};
+
+
+
+
+function Data() {
+	this.expando = jQuery.expando + Data.uid++;
+}
+
+Data.uid = 1;
+
+Data.prototype = {
+
+	cache: function( owner ) {
+
+		// Check if the owner object already has a cache
+		var value = owner[ this.expando ];
+
+		// If not, create one
+		if ( !value ) {
+			value = {};
+
+			// We can accept data for non-element nodes in modern browsers,
+			// but we should not, see #8335.
+			// Always return an empty object.
+			if ( acceptData( owner ) ) {
+
+				// If it is a node unlikely to be stringify-ed or looped over
+				// use plain assignment
+				if ( owner.nodeType ) {
+					owner[ this.expando ] = value;
+
+				// Otherwise secure it in a non-enumerable property
+				// configurable must be true to allow the property to be
+				// deleted when data is removed
+				} else {
+					Object.defineProperty( owner, this.expando, {
+						value: value,
+						configurable: true
+					} );
+				}
+			}
+		}
+
+		return value;
+	},
+	set: function( owner, data, value ) {
+		var prop,
+			cache = this.cache( owner );
+
+		// Handle: [ owner, key, value ] args
+		// Always use camelCase key (gh-2257)
+		if ( typeof data === "string" ) {
+			cache[ camelCase( data ) ] = value;
+
+		// Handle: [ owner, { properties } ] args
+		} else {
+
+			// Copy the properties one-by-one to the cache object
+			for ( prop in data ) {
+				cache[ camelCase( prop ) ] = data[ prop ];
+			}
+		}
+		return cache;
+	},
+	get: function( owner, key ) {
+		return key === undefined ?
+			this.cache( owner ) :
+
+			// Always use camelCase key (gh-2257)
+			owner[ this.expando ] && owner[ this.expando ][ camelCase( key ) ];
+	},
+	access: function( owner, key, value ) {
+
+		// In cases where either:
+		//
+		//   1. No key was specified
+		//   2. A string key was specified, but no value provided
+		//
+		// Take the "read" path and allow the get method to determine
+		// which value to return, respectively either:
+		//
+		//   1. The entire cache object
+		//   2. The data stored at the key
+		//
+		if ( key === undefined ||
+				( ( key && typeof key === "string" ) && value === undefined ) ) {
+
+			return this.get( owner, key );
+		}
+
+		// When the key is not a string, or both a key and value
+		// are specified, set or extend (existing objects) with either:
+		//
+		//   1. An object of properties
+		//   2. A key and value
+		//
+		this.set( owner, key, value );
+
+		// Since the "set" path can have two possible entry points
+		// return the expected data based on which path was taken[*]
+		return value !== undefined ? value : key;
+	},
+	remove: function( owner, key ) {
+		var i,
+			cache = owner[ this.expando ];
+
+		if ( cache === undefined ) {
+			return;
+		}
+
+		if ( key !== undefined ) {
+
+			// Support array or space separated string of keys
+			if ( Array.isArray( key ) ) {
+
+				// If key is an array of keys...
+				// We always set camelCase keys, so remove that.
+				key = key.map( camelCase );
+			} else {
+				key = camelCase( key );
+
+				// If a key with the spaces exists, use it.
+				// Otherwise, create an array by matching non-whitespace
+				key = key in cache ?
+					[ key ] :
+					( key.match( rnothtmlwhite ) || [] );
+			}
+
+			i = key.length;
+
+			while ( i-- ) {
+				delete cache[ key[ i ] ];
+			}
+		}
+
+		// Remove the expando if there's no more data
+		if ( key === undefined || jQuery.isEmptyObject( cache ) ) {
+
+			// Support: Chrome <=35 - 45
+			// Webkit & Blink performance suffers when deleting properties
+			// from DOM nodes, so set to undefined instead
+			// https://bugs.chromium.org/p/chromium/issues/detail?id=378607 (bug restricted)
+			if ( owner.nodeType ) {
+				owner[ this.expando ] = undefined;
+			} else {
+				delete owner[ this.expando ];
+			}
+		}
+	},
+	hasData: function( owner ) {
+		var cache = owner[ this.expando ];
+		return cache !== undefined && !jQuery.isEmptyObject( cache );
+	}
+};
+var dataPriv = new Data();
+
+var dataUser = new Data();
+
+
+
+//	Implementation Summary
+//
+//	1. Enforce API surface and semantic compatibility with 1.9.x branch
+//	2. Improve the module's maintainability by reducing the storage
+//		paths to a single mechanism.
+//	3. Use the same single mechanism to support "private" and "user" data.
+//	4. _Never_ expose "private" data to user code (TODO: Drop _data, _removeData)
+//	5. Avoid exposing implementation details on user objects (eg. expando properties)
+//	6. Provide a clear path for implementation upgrade to WeakMap in 2014
+
+var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
+	rmultiDash = /[A-Z]/g;
+
+function getData( data ) {
+	if ( data === "true" ) {
+		return true;
+	}
+
+	if ( data === "false" ) {
+		return false;
+	}
+
+	if ( data === "null" ) {
+		return null;
+	}
+
+	// Only convert to a number if it doesn't change the string
+	if ( data === +data + "" ) {
+		return +data;
+	}
+
+	if ( rbrace.test( data ) ) {
+		return JSON.parse( data );
+	}
+
+	return data;
+}
+
+function dataAttr( elem, key, data ) {
+	var name;
+
+	// If nothing was found internally, try to fetch any
+	// data from the HTML5 data-* attribute
+	if ( data === undefined && elem.nodeType === 1 ) {
+		name = "data-" + key.replace( rmultiDash, "-$&" ).toLowerCase();
+		data = elem.getAttribute( name );
+
+		if ( typeof data === "string" ) {
+			try {
+				data = getData( data );
+			} catch ( e ) {}
+
+			// Make sure we set the data so it isn't changed later
+			dataUser.set( elem, key, data );
+		} else {
+			data = undefined;
+		}
+	}
+	return data;
+}
+
+jQuery.extend( {
+	hasData: function( elem ) {
+		return dataUser.hasData( elem ) || dataPriv.hasData( elem );
+	},
+
+	data: function( elem, name, data ) {
+		return dataUser.access( elem, name, data );
+	},
+
+	removeData: function( elem, name ) {
+		dataUser.remove( elem, name );
+	},
+
+	// TODO: Now that all calls to _data and _removeData have been replaced
+	// with direct calls to dataPriv methods, these can be deprecated.
+	_data: function( elem, name, data ) {
+		return dataPriv.access( elem, name, data );
+	},
+
+	_removeData: function( elem, name ) {
+		dataPriv.remove( elem, name );
+	}
+} );
+
+jQuery.fn.extend( {
+	data: function( key, value ) {
+		var i, name, data,
+			elem = this[ 0 ],
+			attrs = elem && elem.attributes;
+
+		// Gets all values
+		if ( key === undefined ) {
+			if ( this.length ) {
+				data = dataUser.get( elem );
+
+				if ( elem.nodeType === 1 && !dataPriv.get( elem, "hasDataAttrs" ) ) {
+					i = attrs.length;
+					while ( i-- ) {
+
+						// Support: IE 11 only
+						// The attrs elements can be null (#14894)
+						if ( attrs[ i ] ) {
+							name = attrs[ i ].name;
+							if ( name.indexOf( "data-" ) === 0 ) {
+								name = camelCase( name.slice( 5 ) );
+								dataAttr( elem, name, data[ name ] );
+							}
+						}
+					}
+					dataPriv.set( elem, "hasDataAttrs", true );
+				}
+			}
+
+			return data;
+		}
+
+		// Sets multiple values
+		if ( typeof key === "object" ) {
+			return this.each( function() {
+				dataUser.set( this, key );
+			} );
+		}
+
+		return access( this, function( value ) {
+			var data;
+
+			// The calling jQuery object (element matches) is not empty
+			// (and therefore has an element appears at this[ 0 ]) and the
+			// `value` parameter was not undefined. An empty jQuery object
+			// will result in `undefined` for elem = this[ 0 ] which will
+			// throw an exception if an attempt to read a data cache is made.
+			if ( elem && value === undefined ) {
+
+				// Attempt to get data from the cache
+				// The key will always be camelCased in Data
+				data = dataUser.get( elem, key );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// Attempt to "discover" the data in
+				// HTML5 custom data-* attrs
+				data = dataAttr( elem, key );
+				if ( data !== undefined ) {
+					return data;
+				}
+
+				// We tried really hard, but the data doesn't exist.
+				return;
+			}
+
+			// Set the data...
+			this.each( function() {
+
+				// We always store the camelCased key
+				dataUser.set( this, key, value );
+			} );
+		}, null, value, arguments.length > 1, null, true );
+	},
+
+	removeData: function( key ) {
+		return this.each( function() {
+			dataUser.remove( this, key );
+		} );
+	}
+} );
+
+
+jQuery.extend( {
+	queue: function( elem, type, data ) {
+		var queue;
+
+		if ( elem ) {
+			type = ( type || "fx" ) + "queue";
+			queue = dataPriv.get( elem, type );
+
+			// Speed up dequeue by getting out quickly if this is just a lookup
+			if ( data ) {
+				if ( !queue || Array.isArray( data ) ) {
+					queue = dataPriv.access( elem, type, jQuery.makeArray( data ) );
+				} else {
+					queue.push( data );
+				}
+			}
+			return queue || [];
+		}
+	},
+
+	dequeue: function( elem, type ) {
+		type = type || "fx";
+
+		var queue = jQuery.queue( elem, type ),
+			startLength = queue.length,
+			fn = queue.shift(),
+			hooks = jQuery._queueHooks( elem, type ),
+			next = function() {
+				jQuery.dequeue( elem, type );
+			};
+
+		// If the fx queue is dequeued, always remove the progress sentinel
+		if ( fn === "inprogress" ) {
+			fn = queue.shift();
+			startLength--;
+		}
+
+		if ( fn ) {
+
+			// Add a progress sentinel to prevent the fx queue from being
+			// automatically dequeued
+			if ( type === "fx" ) {
+				queue.unshift( "inprogress" );
+			}
+
+			// Clear up the last queue stop function
+			delete hooks.stop;
+			fn.call( elem, next, hooks );
+		}
+
+		if ( !startLength && hooks ) {
+			hooks.empty.fire();
+		}
+	},
+
+	// Not public - generate a queueHooks object, or return the current one
+	_queueHooks: function( elem, type ) {
+		var key = type + "queueHooks";
+		return dataPriv.get( elem, key ) || dataPriv.access( elem, key, {
+			empty: jQuery.Callbacks( "once memory" ).add( function() {
+				dataPriv.remove( elem, [ type + "queue", key ] );
+			} )
+		} );
+	}
+} );
+
+jQuery.fn.extend( {
+	queue: function( type, data ) {
+		var setter = 2;
+
+		if ( typeof type !== "string" ) {
+			data = type;
+			type = "fx";
+			setter--;
+		}
+
+		if ( arguments.length < setter ) {
+			return jQuery.queue( this[ 0 ], type );
+		}
+
+		return data === undefined ?
+			this :
+			this.each( function() {
+				var queue = jQuery.queue( this, type, data );
+
+				// Ensure a hooks for this queue
+				jQuery._queueHooks( this, type );
+
+				if ( type === "fx" && queue[ 0 ] !== "inprogress" ) {
+					jQuery.dequeue( this, type );
+				}
+			} );
+	},
+	dequeue: function( type ) {
+		return this.each( function() {
+			jQuery.dequeue( this, type );
+		} );
+	},
+	clearQueue: function( type ) {
+		return this.queue( type || "fx", [] );
+	},
+
+	// Get a promise resolved when queues of a certain type
+	// are emptied (fx is the type by default)
+	promise: function( type, obj ) {
+		var tmp,
+			count = 1,
+			defer = jQuery.Deferred(),
+			elements = this,
+			i = this.length,
+			resolve = function() {
+				if ( !( --count ) ) {
+					defer.resolveWith( elements, [ elements ] );
+				}
+			};
+
+		if ( typeof type !== "string" ) {
+			obj = type;
+			type = undefined;
+		}
+		type = type || "fx";
+
+		while ( i-- ) {
+			tmp = dataPriv.get( elements[ i ], type + "queueHooks" );
+			if ( tmp && tmp.empty ) {
+				count++;
+				tmp.empty.add( resolve );
+			}
+		}
+		resolve();
+		return defer.promise( obj );
+	}
+} );
+var pnum = ( /[+-]?(?:\d*\.|)\d+(?:[eE][+-]?\d+|)/ ).source;
+
+var rcssNum = new RegExp( "^(?:([+-])=|)(" + pnum + ")([a-z%]*)$", "i" );
+
+
+var cssExpand = [ "Top", "Right", "Bottom", "Left" ];
+
+var documentElement = document.documentElement;
+
+
+
+	var isAttached = function( elem ) {
+			return jQuery.contains( elem.ownerDocument, elem );
+		},
+		composed = { composed: true };
+
+	// Support: IE 9 - 11+, Edge 12 - 18+, iOS 10.0 - 10.2 only
+	// Check attachment across shadow DOM boundaries when possible (gh-3504)
+	// Support: iOS 10.0-10.2 only
+	// Early iOS 10 versions support `attachShadow` but not `getRootNode`,
+	// leading to errors. We need to check for `getRootNode`.
+	if ( documentElement.getRootNode ) {
+		isAttached = function( elem ) {
+			return jQuery.contains( elem.ownerDocument, elem ) ||
+				elem.getRootNode( composed ) === elem.ownerDocument;
+		};
+	}
+var isHiddenWithinTree = function( elem, el ) {
+
+		// isHiddenWithinTree might be called from jQuery#filter function;
+		// in that case, element will be second argument
+		elem = el || elem;
+
+		// Inline style trumps all
+		return elem.style.display === "none" ||
+			elem.style.display === "" &&
+
+			// Otherwise, check computed style
+			// Support: Firefox <=43 - 45
+			// Disconnected elements can have computed display: none, so first confirm that elem is
+			// in the document.
+			isAttached( elem ) &&
+
+			jQuery.css( elem, "display" ) === "none";
+	};
+
+var swap = function( elem, options, callback, args ) {
+	var ret, name,
+		old = {};
+
+	// Remember the old values, and insert the new ones
+	for ( name in options ) {
+		old[ name ] = elem.style[ name ];
+		elem.style[ name ] = options[ name ];
+	}
+
+	ret = callback.apply( elem, args || [] );
+
+	// Revert the old values
+	for ( name in options ) {
+		elem.style[ name ] = old[ name ];
+	}
+
+	return ret;
+};
+
+
+
+
+function adjustCSS( elem, prop, valueParts, tween ) {
+	var adjusted, scale,
+		maxIterations = 20,
+		currentValue = tween ?
+			function() {
+				return tween.cur();
+			} :
+			function() {
+				return jQuery.css( elem, prop, "" );
+			},
+		initial = currentValue(),
+		unit = valueParts && valueParts[ 3 ] || ( jQuery.cssNumber[ prop ] ? "" : "px" ),
+
+		// Starting value computation is required for potential unit mismatches
+		initialInUnit = elem.nodeType &&
+			( jQuery.cssNumber[ prop ] || unit !== "px" && +initial ) &&
+			rcssNum.exec( jQuery.css( elem, prop ) );
+
+	if ( initialInUnit && initialInUnit[ 3 ] !== unit ) {
+
+		// Support: Firefox <=54
+		// Halve the iteration target value to prevent interference from CSS upper bounds (gh-2144)
+		initial = initial / 2;
+
+		// Trust units reported by jQuery.css
+		unit = unit || initialInUnit[ 3 ];
+
+		// Iteratively approximate from a nonzero starting point
+		initialInUnit = +initial || 1;
+
+		while ( maxIterations-- ) {
+
+			// Evaluate and update our best guess (doubling guesses that zero out).
+			// Finish if the scale equals or crosses 1 (making the old*new product non-positive).
+			jQuery.style( elem, prop, initialInUnit + unit );
+			if ( ( 1 - scale ) * ( 1 - ( scale = currentValue() / initial || 0.5 ) ) <= 0 ) {
+				maxIterations = 0;
+			}
+			initialInUnit = initialInUnit / scale;
+
+		}
+
+		initialInUnit = initialInUnit * 2;
+		jQuery.style( elem, prop, initialInUnit + unit );
+
+		// Make sure we update the tween properties later on
+		valueParts = valueParts || [];
+	}
+
+	if ( valueParts ) {
+		initialInUnit = +initialInUnit || +initial || 0;
+
+		// Apply relative offset (+=/-=) if specified
+		adjusted = valueParts[ 1 ] ?
+			initialInUnit + ( valueParts[ 1 ] + 1 ) * valueParts[ 2 ] :
+			+valueParts[ 2 ];
+		if ( tween ) {
+			tween.unit = unit;
+			tween.start = initialInUnit;
+			tween.end = adjusted;
+		}
+	}
+	return adjusted;
+}
+
+
+var defaultDisplayMap = {};
+
+function getDefaultDisplay( elem ) {
+	var temp,
+		doc = elem.ownerDocument,
+		nodeName = elem.nodeName,
+		display = defaultDisplayMap[ nodeName ];
+
+	if ( display ) {
+		return display;
+	}
+
+	temp = doc.body.appendChild( doc.createElement( nodeName ) );
+	display = jQuery.css( temp, "display" );
+
+	temp.parentNode.removeChild( temp );
+
+	if ( display === "none" ) {
+		display = "block";
+	}
+	defaultDisplayMap[ nodeName ] = display;
+
+	return display;
+}
+
+function showHide( elements, show ) {
+	var display, elem,
+		values = [],
+		index = 0,
+		length = elements.length;
+
+	// Determine new display value for elements that need to change
+	for ( ; index < length; index++ ) {
+		elem = elements[ index ];
+		if ( !elem.style ) {
+			continue;
+		}
+
+		display = elem.style.display;
+		if ( show ) {
+
+			// Since we force visibility upon cascade-hidden elements, an immediate (and slow)
+			// check is required in this first loop unless we have a nonempty display value (either
+			// inline or about-to-be-restored)
+			if ( display === "none" ) {
+				values[ index ] = dataPriv.get( elem, "display" ) || null;
+				if ( !values[ index ] ) {
+					elem.style.display = "";
+				}
+			}
+			if ( elem.style.display === "" && isHiddenWithinTree( elem ) ) {
+				values[ index ] = getDefaultDisplay( elem );
+			}
+		} else {
+			if ( display !== "none" ) {
+				values[ index ] = "none";
+
+				// Remember what we're overwriting
+				dataPriv.set( elem, "display", display );
+			}
+		}
+	}
+
+	// Set the display of the elements in a second loop to avoid constant reflow
+	for ( index = 0; index < length; index++ ) {
+		if ( values[ index ] != null ) {
+			elements[ index ].style.display = values[ index ];
+		}
+	}
+
+	return elements;
+}
+
+jQuery.fn.extend( {
+	show: function() {
+		return showHide( this, true );
+	},
+	hide: function() {
+		return showHide( this );
+	},
+	toggle: function( state ) {
+		if ( typeof state === "boolean" ) {
+			return state ? this.show() : this.hide();
+		}
+
+		return this.each( function() {
+			if ( isHiddenWithinTree( this ) ) {
+				jQuery( this ).show();
+			} else {
+				jQuery( this ).hide();
+			}
+		} );
+	}
+} );
+var rcheckableType = ( /^(?:checkbox|radio)$/i );
+
+var rtagName = ( /<([a-z][^\/\0>\x20\t\r\n\f]*)/i );
+
+var rscriptType = ( /^$|^module$|\/(?:java|ecma)script/i );
+
+
+
+// We have to close these tags to support XHTML (#13200)
+var wrapMap = {
+
+	// Support: IE <=9 only
+	option: [ 1, "<select multiple='multiple'>", "</select>" ],
+
+	// XHTML parsers do not magically insert elements in the
+	// same way that tag soup parsers do. So we cannot shorten
+	// this by omitting <tbody> or other required elements.
+	thead: [ 1, "<table>", "</table>" ],
+	col: [ 2, "<table><colgroup>", "</colgroup></table>" ],
+	tr: [ 2, "<table><tbody>", "</tbody></table>" ],
+	td: [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ],
+
+	_default: [ 0, "", "" ]
+};
+
+// Support: IE <=9 only
+wrapMap.optgroup = wrapMap.option;
+
+wrapMap.tbody = wrapMap.tfoot = wrapMap.colgroup = wrapMap.caption = wrapMap.thead;
+wrapMap.th = wrapMap.td;
+
+
+function getAll( context, tag ) {
+
+	// Support: IE <=9 - 11 only
+	// Use typeof to avoid zero-argument method invocation on host objects (#15151)
+	var ret;
+
+	if ( typeof context.getElementsByTagName !== "undefined" ) {
+		ret = context.getElementsByTagName( tag || "*" );
+
+	} else if ( typeof context.querySelectorAll !== "undefined" ) {
+		ret = context.querySelectorAll( tag || "*" );
+
+	} else {
+		ret = [];
+	}
+
+	if ( tag === undefined || tag && nodeName( context, tag ) ) {
+		return jQuery.merge( [ context ], ret );
+	}
+
+	return ret;
+}
+
+
+// Mark scripts as having already been evaluated
+function setGlobalEval( elems, refElements ) {
+	var i = 0,
+		l = elems.length;
+
+	for ( ; i < l; i++ ) {
+		dataPriv.set(
+			elems[ i ],
+			"globalEval",
+			!refElements || dataPriv.get( refElements[ i ], "globalEval" )
+		);
+	}
+}
+
+
+var rhtml = /<|&#?\w+;/;
+
+function buildFragment( elems, context, scripts, selection, ignored ) {
+	var elem, tmp, tag, wrap, attached, j,
+		fragment = context.createDocumentFragment(),
+		nodes = [],
+		i = 0,
+		l = elems.length;
+
+	for ( ; i < l; i++ ) {
+		elem = elems[ i ];
+
+		if ( elem || elem === 0 ) {
+
+			// Add nodes directly
+			if ( toType( elem ) === "object" ) {
+
+				// Support: Android <=4.0 only, PhantomJS 1 only
+				// push.apply(_, arraylike) throws on ancient WebKit
+				jQuery.merge( nodes, elem.nodeType ? [ elem ] : elem );
+
+			// Convert non-html into a text node
+			} else if ( !rhtml.test( elem ) ) {
+				nodes.push( context.createTextNode( elem ) );
+
+			// Convert html into DOM nodes
+			} else {
+				tmp = tmp || fragment.appendChild( context.createElement( "div" ) );
+
+				// Deserialize a standard representation
+				tag = ( rtagName.exec( elem ) || [ "", "" ] )[ 1 ].toLowerCase();
+				wrap = wrapMap[ tag ] || wrapMap._default;
+				tmp.innerHTML = wrap[ 1 ] + jQuery.htmlPrefilter( elem ) + wrap[ 2 ];
+
+				// Descend through wrappers to the right content
+				j = wrap[ 0 ];
+				while ( j-- ) {
+					tmp = tmp.lastChild;
+				}
+
+				// Support: Android <=4.0 only, PhantomJS 1 only
+				// push.apply(_, arraylike) throws on ancient WebKit
+				jQuery.merge( nodes, tmp.childNodes );
+
+				// Remember the top-level container
+				tmp = fragment.firstChild;
+
+				// Ensure the created nodes are orphaned (#12392)
+				tmp.textContent = "";
+			}
+		}
+	}
+
+	// Remove wrapper from fragment
+	fragment.textContent = "";
+
+	i = 0;
+	while ( ( elem = nodes[ i++ ] ) ) {
+
+		// Skip elements already in the context collection (trac-4087)
+		if ( selection && jQuery.inArray( elem, selection ) > -1 ) {
+			if ( ignored ) {
+				ignored.push( elem );
+			}
+			continue;
+		}
+
+		attached = isAttached( elem );
+
+		// Append to fragment
+		tmp = getAll( fragment.appendChild( elem ), "script" );
+
+		// Preserve script evaluation history
+		if ( attached ) {
+			setGlobalEval( tmp );
+		}
+
+		// Capture executables
+		if ( scripts ) {
+			j = 0;
+			while ( ( elem = tmp[ j++ ] ) ) {
+				if ( rscriptType.test( elem.type || "" ) ) {
+					scripts.push( elem );
+				}
+			}
+		}
+	}
+
+	return fragment;
+}
+
+
+( function() {
+	var fragment = document.createDocumentFragment(),
+		div = fragment.appendChild( document.createElement( "div" ) ),
+		input = document.createElement( "input" );
+
+	// Support: Android 4.0 - 4.3 only
+	// Check state lost if the name is set (#11217)
+	// Support: Windows Web Apps (WWA)
+	// `name` and `type` must use .setAttribute for WWA (#14901)
+	input.setAttribute( "type", "radio" );
+	input.setAttribute( "checked", "checked" );
+	input.setAttribute( "name", "t" );
+
+	div.appendChild( input );
+
+	// Support: Android <=4.1 only
+	// Older WebKit doesn't clone checked state correctly in fragments
+	support.checkClone = div.cloneNode( true ).cloneNode( true ).lastChild.checked;
+
+	// Support: IE <=11 only
+	// Make sure textarea (and checkbox) defaultValue is properly cloned
+	div.innerHTML = "<textarea>x</textarea>";
+	support.noCloneChecked = !!div.cloneNode( true ).lastChild.defaultValue;
+} )();
+
+
+var
+	rkeyEvent = /^key/,
+	rmouseEvent = /^(?:mouse|pointer|contextmenu|drag|drop)|click/,
+	rtypenamespace = /^([^.]*)(?:\.(.+)|)/;
+
+function returnTrue() {
+	return true;
+}
+
+function returnFalse() {
+	return false;
+}
+
+// Support: IE <=9 - 11+
+// focus() and blur() are asynchronous, except when they are no-op.
+// So expect focus to be synchronous when the element is already active,
+// and blur to be synchronous when the element is not already active.
+// (focus and blur are always synchronous in other supported browsers,
+// this just defines when we can count on it).
+function expectSync( elem, type ) {
+	return ( elem === safeActiveElement() ) === ( type === "focus" );
+}
+
+// Support: IE <=9 only
+// Accessing document.activeElement can throw unexpectedly
+// https://bugs.jquery.com/ticket/13393
+function safeActiveElement() {
+	try {
+		return document.activeElement;
+	} catch ( err ) { }
+}
+
+function on( elem, types, selector, data, fn, one ) {
+	var origFn, type;
+
+	// Types can be a map of types/handlers
+	if ( typeof types === "object" ) {
+
+		// ( types-Object, selector, data )
+		if ( typeof selector !== "string" ) {
+
+			// ( types-Object, data )
+			data = data || selector;
+			selector = undefined;
+		}
+		for ( type in types ) {
+			on( elem, type, selector, data, types[ type ], one );
+		}
+		return elem;
+	}
+
+	if ( data == null && fn == null ) {
+
+		// ( types, fn )
+		fn = selector;
+		data = selector = undefined;
+	} else if ( fn == null ) {
+		if ( typeof selector === "string" ) {
+
+			// ( types, selector, fn )
+			fn = data;
+			data = undefined;
+		} else {
+
+			// ( types, data, fn )
+			fn = data;
+			data = selector;
+			selector = undefined;
+		}
+	}
+	if ( fn === false ) {
+		fn = returnFalse;
+	} else if ( !fn ) {
+		return elem;
+	}
+
+	if ( one === 1 ) {
+		origFn = fn;
+		fn = function( event ) {
+
+			// Can use an empty set, since event contains the info
+			jQuery().off( event );
+			return origFn.apply( this, arguments );
+		};
+
+		// Use same guid so caller can remove using origFn
+		fn.guid = origFn.guid || ( origFn.guid = jQuery.guid++ );
+	}
+	return elem.each( function() {
+		jQuery.event.add( this, types, fn, data, selector );
+	} );
+}
+
+/*
+ * Helper functions for managing events -- not part of the public interface.
+ * Props to Dean Edwards' addEvent library for many of the ideas.
+ */
+jQuery.event = {
+
+	global: {},
+
+	add: function( elem, types, handler, data, selector ) {
+
+		var handleObjIn, eventHandle, tmp,
+			events, t, handleObj,
+			special, handlers, type, namespaces, origType,
+			elemData = dataPriv.get( elem );
+
+		// Don't attach events to noData or text/comment nodes (but allow plain objects)
+		if ( !elemData ) {
+			return;
+		}
+
+		// Caller can pass in an object of custom data in lieu of the handler
+		if ( handler.handler ) {
+			handleObjIn = handler;
+			handler = handleObjIn.handler;
+			selector = handleObjIn.selector;
+		}
+
+		// Ensure that invalid selectors throw exceptions at attach time
+		// Evaluate against documentElement in case elem is a non-element node (e.g., document)
+		if ( selector ) {
+			jQuery.find.matchesSelector( documentElement, selector );
+		}
+
+		// Make sure that the handler has a unique ID, used to find/remove it later
+		if ( !handler.guid ) {
+			handler.guid = jQuery.guid++;
+		}
+
+		// Init the element's event structure and main handler, if this is the first
+		if ( !( events = elemData.events ) ) {
+			events = elemData.events = {};
+		}
+		if ( !( eventHandle = elemData.handle ) ) {
+			eventHandle = elemData.handle = function( e ) {
+
+				// Discard the second event of a jQuery.event.trigger() and
+				// when an event is called after a page has unloaded
+				return typeof jQuery !== "undefined" && jQuery.event.triggered !== e.type ?
+					jQuery.event.dispatch.apply( elem, arguments ) : undefined;
+			};
+		}
+
+		// Handle multiple events separated by a space
+		types = ( types || "" ).match( rnothtmlwhite ) || [ "" ];
+		t = types.length;
+		while ( t-- ) {
+			tmp = rtypenamespace.exec( types[ t ] ) || [];
+			type = origType = tmp[ 1 ];
+			namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
+
+			// There *must* be a type, no attaching namespace-only handlers
+			if ( !type ) {
+				continue;
+			}
+
+			// If event changes its type, use the special event handlers for the changed type
+			special = jQuery.event.special[ type ] || {};
+
+			// If selector defined, determine special event api type, otherwise given type
+			type = ( selector ? special.delegateType : special.bindType ) || type;
+
+			// Update special based on newly reset type
+			special = jQuery.event.special[ type ] || {};
+
+			// handleObj is passed to all event handlers
+			handleObj = jQuery.extend( {
+				type: type,
+				origType: origType,
+				data: data,
+				handler: handler,
+				guid: handler.guid,
+				selector: selector,
+				needsContext: selector && jQuery.expr.match.needsContext.test( selector ),
+				namespace: namespaces.join( "." )
+			}, handleObjIn );
+
+			// Init the event handler queue if we're the first
+			if ( !( handlers = events[ type ] ) ) {
+				handlers = events[ type ] = [];
+				handlers.delegateCount = 0;
+
+				// Only use addEventListener if the special events handler returns false
+				if ( !special.setup ||
+					special.setup.call( elem, data, namespaces, eventHandle ) === false ) {
+
+					if ( elem.addEventListener ) {
+						elem.addEventListener( type, eventHandle );
+					}
+				}
+			}
+
+			if ( special.add ) {
+				special.add.call( elem, handleObj );
+
+				if ( !handleObj.handler.guid ) {
+					handleObj.handler.guid = handler.guid;
+				}
+			}
+
+			// Add to the element's handler list, delegates in front
+			if ( selector ) {
+				handlers.splice( handlers.delegateCount++, 0, handleObj );
+			} else {
+				handlers.push( handleObj );
+			}
+
+			// Keep track of which events have ever been used, for event optimization
+			jQuery.event.global[ type ] = true;
+		}
+
+	},
+
+	// Detach an event or set of events from an element
+	remove: function( elem, types, handler, selector, mappedTypes ) {
+
+		var j, origCount, tmp,
+			events, t, handleObj,
+			special, handlers, type, namespaces, origType,
+			elemData = dataPriv.hasData( elem ) && dataPriv.get( elem );
+
+		if ( !elemData || !( events = elemData.events ) ) {
+			return;
+		}
+
+		// Once for each type.namespace in types; type may be omitted
+		types = ( types || "" ).match( rnothtmlwhite ) || [ "" ];
+		t = types.length;
+		while ( t-- ) {
+			tmp = rtypenamespace.exec( types[ t ] ) || [];
+			type = origType = tmp[ 1 ];
+			namespaces = ( tmp[ 2 ] || "" ).split( "." ).sort();
+
+			// Unbind all events (on this namespace, if provided) for the element
+			if ( !type ) {
+				for ( type in events ) {
+					jQuery.event.remove( elem, type + types[ t ], handler, selector, true );
+				}
+				continue;
+			}
+
+			special = jQuery.event.special[ type ] || {};
+			type = ( selector ? special.delegateType : special.bindType ) || type;
+			handlers = events[ type ] || [];
+			tmp = tmp[ 2 ] &&
+				new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" );
+
+			// Remove matching events
+			origCount = j = handlers.length;
+			while ( j-- ) {
+				handleObj = handlers[ j ];
+
+				if ( ( mappedTypes || origType === handleObj.origType ) &&
+					( !handler || handler.guid === handleObj.guid ) &&
+					( !tmp || tmp.test( handleObj.namespace ) ) &&
+					( !selector || selector === handleObj.selector ||
+						selector === "**" && handleObj.selector ) ) {
+					handlers.splice( j, 1 );
+
+					if ( handleObj.selector ) {
+						handlers.delegateCount--;
+					}
+					if ( special.remove ) {
+						special.remove.call( elem, handleObj );
+					}
+				}
+			}
+
+			// Remove generic event handler if we removed something and no more handlers exist
+			// (avoids potential for endless recursion during removal of special event handlers)
+			if ( origCount && !handlers.length ) {
+				if ( !special.teardown ||
+					special.teardown.call( elem, namespaces, elemData.handle ) === false ) {
+
+					jQuery.removeEvent( elem, type, elemData.handle );
+				}
+
+				delete events[ type ];
+			}
+		}
+
+		// Remove data and the expando if it's no longer used
+		if ( jQuery.isEmptyObject( events ) ) {
+			dataPriv.remove( elem, "handle events" );
+		}
+	},
+
+	dispatch: function( nativeEvent ) {
+
+		// Make a writable jQuery.Event from the native event object
+		var event = jQuery.event.fix( nativeEvent );
+
+		var i, j, ret, matched, handleObj, handlerQueue,
+			args = new Array( arguments.length ),
+			handlers = ( dataPriv.get( this, "events" ) || {} )[ event.type ] || [],
+			special = jQuery.event.special[ event.type ] || {};
+
+		// Use the fix-ed jQuery.Event rather than the (read-only) native event
+		args[ 0 ] = event;
+
+		for ( i = 1; i < arguments.length; i++ ) {
+			args[ i ] = arguments[ i ];
+		}
+
+		event.delegateTarget = this;
+
+		// Call the preDispatch hook for the mapped type, and let it bail if desired
+		if ( special.preDispatch && special.preDispatch.call( this, event ) === false ) {
+			return;
+		}
+
+		// Determine handlers
+		handlerQueue = jQuery.event.handlers.call( this, event, handlers );
+
+		// Run delegates first; they may want to stop propagation beneath us
+		i = 0;
+		while ( ( matched = handlerQueue[ i++ ] ) && !event.isPropagationStopped() ) {
+			event.currentTarget = matched.elem;
+
+			j = 0;
+			while ( ( handleObj = matched.handlers[ j++ ] ) &&
+				!event.isImmediatePropagationStopped() ) {
+
+				// If the event is namespaced, then each handler is only invoked if it is
+				// specially universal or its namespaces are a superset of the event's.
+				if ( !event.rnamespace || handleObj.namespace === false ||
+					event.rnamespace.test( handleObj.namespace ) ) {
+
+					event.handleObj = handleObj;
+					event.data = handleObj.data;
+
+					ret = ( ( jQuery.event.special[ handleObj.origType ] || {} ).handle ||
+						handleObj.handler ).apply( matched.elem, args );
+
+					if ( ret !== undefined ) {
+						if ( ( event.result = ret ) === false ) {
+							event.preventDefault();
+							event.stopPropagation();
+						}
+					}
+				}
+			}
+		}
+
+		// Call the postDispatch hook for the mapped type
+		if ( special.postDispatch ) {
+			special.postDispatch.call( this, event );
+		}
+
+		return event.result;
+	},
+
+	handlers: function( event, handlers ) {
+		var i, handleObj, sel, matchedHandlers, matchedSelectors,
+			handlerQueue = [],
+			delegateCount = handlers.delegateCount,
+			cur = event.target;
+
+		// Find delegate handlers
+		if ( delegateCount &&
+
+			// Support: IE <=9
+			// Black-hole SVG <use> instance trees (trac-13180)
+			cur.nodeType &&
+
+			// Support: Firefox <=42
+			// Suppress spec-violating clicks indicating a non-primary pointer button (trac-3861)
+			// https://www.w3.org/TR/DOM-Level-3-Events/#event-type-click
+			// Support: IE 11 only
+			// ...but not arrow key "clicks" of radio inputs, which can have `button` -1 (gh-2343)
+			!( event.type === "click" && event.button >= 1 ) ) {
+
+			for ( ; cur !== this; cur = cur.parentNode || this ) {
+
+				// Don't check non-elements (#13208)
+				// Don't process clicks on disabled elements (#6911, #8165, #11382, #11764)
+				if ( cur.nodeType === 1 && !( event.type === "click" && cur.disabled === true ) ) {
+					matchedHandlers = [];
+					matchedSelectors = {};
+					for ( i = 0; i < delegateCount; i++ ) {
+						handleObj = handlers[ i ];
+
+						// Don't conflict with Object.prototype properties (#13203)
+						sel = handleObj.selector + " ";
+
+						if ( matchedSelectors[ sel ] === undefined ) {
+							matchedSelectors[ sel ] = handleObj.needsContext ?
+								jQuery( sel, this ).index( cur ) > -1 :
+								jQuery.find( sel, this, null, [ cur ] ).length;
+						}
+						if ( matchedSelectors[ sel ] ) {
+							matchedHandlers.push( handleObj );
+						}
+					}
+					if ( matchedHandlers.length ) {
+						handlerQueue.push( { elem: cur, handlers: matchedHandlers } );
+					}
+				}
+			}
+		}
+
+		// Add the remaining (directly-bound) handlers
+		cur = this;
+		if ( delegateCount < handlers.length ) {
+			handlerQueue.push( { elem: cur, handlers: handlers.slice( delegateCount ) } );
+		}
+
+		return handlerQueue;
+	},
+
+	addProp: function( name, hook ) {
+		Object.defineProperty( jQuery.Event.prototype, name, {
+			enumerable: true,
+			configurable: true,
+
+			get: isFunction( hook ) ?
+				function() {
+					if ( this.originalEvent ) {
+							return hook( this.originalEvent );
+					}
+				} :
+				function() {
+					if ( this.originalEvent ) {
+							return this.originalEvent[ name ];
+					}
+				},
+
+			set: function( value ) {
+				Object.defineProperty( this, name, {
+					enumerable: true,
+					configurable: true,
+					writable: true,
+					value: value
+				} );
+			}
+		} );
+	},
+
+	fix: function( originalEvent ) {
+		return originalEvent[ jQuery.expando ] ?
+			originalEvent :
+			new jQuery.Event( originalEvent );
+	},
+
+	special: {
+		load: {
+
+			// Prevent triggered image.load events from bubbling to window.load
+			noBubble: true
+		},
+		click: {
+
+			// Utilize native event to ensure correct state for checkable inputs
+			setup: function( data ) {
+
+				// For mutual compressibility with _default, replace `this` access with a local var.
+				// `|| data` is dead code meant only to preserve the variable through minification.
+				var el = this || data;
+
+				// Claim the first handler
+				if ( rcheckableType.test( el.type ) &&
+					el.click && nodeName( el, "input" ) ) {
+
+					// dataPriv.set( el, "click", ... )
+					leverageNative( el, "click", returnTrue );
+				}
+
+				// Return false to allow normal processing in the caller
+				return false;
+			},
+			trigger: function( data ) {
+
+				// For mutual compressibility with _default, replace `this` access with a local var.
+				// `|| data` is dead code meant only to preserve the variable through minification.
+				var el = this || data;
+
+				// Force setup before triggering a click
+				if ( rcheckableType.test( el.type ) &&
+					el.click && nodeName( el, "input" ) ) {
+
+					leverageNative( el, "click" );
+				}
+
+				// Return non-false to allow normal event-path propagation
+				return true;
+			},
+
+			// For cross-browser consistency, suppress native .click() on links
+			// Also prevent it if we're currently inside a leveraged native-event stack
+			_default: function( event ) {
+				var target = event.target;
+				return rcheckableType.test( target.type ) &&
+					target.click && nodeName( target, "input" ) &&
+					dataPriv.get( target, "click" ) ||
+					nodeName( target, "a" );
+			}
+		},
+
+		beforeunload: {
+			postDispatch: function( event ) {
+
+				// Support: Firefox 20+
+				// Firefox doesn't alert if the returnValue field is not set.
+				if ( event.result !== undefined && event.originalEvent ) {
+					event.originalEvent.returnValue = event.result;
+				}
+			}
+		}
+	}
+};
+
+// Ensure the presence of an event listener that handles manually-triggered
+// synthetic events by interrupting progress until reinvoked in response to
+// *native* events that it fires directly, ensuring that state changes have
+// already occurred before other listeners are invoked.
+function leverageNative( el, type, expectSync ) {
+
+	// Missing expectSync indicates a trigger call, which must force setup through jQuery.event.add
+	if ( !expectSync ) {
+		if ( dataPriv.get( el, type ) === undefined ) {
+			jQuery.event.add( el, type, returnTrue );
+		}
+		return;
+	}
+
+	// Register the controller as a special universal handler for all event namespaces
+	dataPriv.set( el, type, false );
+	jQuery.event.add( el, type, {
+		namespace: false,
+		handler: function( event ) {
+			var notAsync, result,
+				saved = dataPriv.get( this, type );
+
+			if ( ( event.isTrigger & 1 ) && this[ type ] ) {
+
+				// Interrupt processing of the outer synthetic .trigger()ed event
+				// Saved data should be false in such cases, but might be a leftover capture object
+				// from an async native handler (gh-4350)
+				if ( !saved.length ) {
+
+					// Store arguments for use when handling the inner native event
+					// There will always be at least one argument (an event object), so this array
+					// will not be confused with a leftover capture object.
+					saved = slice.call( arguments );
+					dataPriv.set( this, type, saved );
+
+					// Trigger the native event and capture its result
+					// Support: IE <=9 - 11+
+					// focus() and blur() are asynchronous
+					notAsync = expectSync( this, type );
+					this[ type ]();
+					result = dataPriv.get( this, type );
+					if ( saved !== result || notAsync ) {
+						dataPriv.set( this, type, false );
+					} else {
+						result = {};
+					}
+					if ( saved !== result ) {
+
+						// Cancel the outer synthetic event
+						event.stopImmediatePropagation();
+						event.preventDefault();
+						return result.value;
+					}
+
+				// If this is an inner synthetic event for an event with a bubbling surrogate
+				// (focus or blur), assume that the surrogate already propagated from triggering the
+				// native event and prevent that from happening again here.
+				// This technically gets the ordering wrong w.r.t. to `.trigger()` (in which the
+				// bubbling surrogate propagates *after* the non-bubbling base), but that seems
+				// less bad than duplication.
+				} else if ( ( jQuery.event.special[ type ] || {} ).delegateType ) {
+					event.stopPropagation();
+				}
+
+			// If this is a native event triggered above, everything is now in order
+			// Fire an inner synthetic event with the original arguments
+			} else if ( saved.length ) {
+
+				// ...and capture the result
+				dataPriv.set( this, type, {
+					value: jQuery.event.trigger(
+
+						// Support: IE <=9 - 11+
+						// Extend with the prototype to reset the above stopImmediatePropagation()
+						jQuery.extend( saved[ 0 ], jQuery.Event.prototype ),
+						saved.slice( 1 ),
+						this
+					)
+				} );
+
+				// Abort handling of the native event
+				event.stopImmediatePropagation();
+			}
+		}
+	} );
+}
+
+jQuery.removeEvent = function( elem, type, handle ) {
+
+	// This "if" is needed for plain objects
+	if ( elem.removeEventListener ) {
+		elem.removeEventListener( type, handle );
+	}
+};
+
+jQuery.Event = function( src, props ) {
+
+	// Allow instantiation without the 'new' keyword
+	if ( !( this instanceof jQuery.Event ) ) {
+		return new jQuery.Event( src, props );
+	}
+
+	// Event object
+	if ( src && src.type ) {
+		this.originalEvent = src;
+		this.type = src.type;
+
+		// Events bubbling up the document may have been marked as prevented
+		// by a handler lower down the tree; reflect the correct value.
+		this.isDefaultPrevented = src.defaultPrevented ||
+				src.defaultPrevented === undefined &&
+
+				// Support: Android <=2.3 only
+				src.returnValue === false ?
+			returnTrue :
+			returnFalse;
+
+		// Create target properties
+		// Support: Safari <=6 - 7 only
+		// Target should not be a text node (#504, #13143)
+		this.target = ( src.target && src.target.nodeType === 3 ) ?
+			src.target.parentNode :
+			src.target;
+
+		this.currentTarget = src.currentTarget;
+		this.relatedTarget = src.relatedTarget;
+
+	// Event type
+	} else {
+		this.type = src;
+	}
+
+	// Put explicitly provided properties onto the event object
+	if ( props ) {
+		jQuery.extend( this, props );
+	}
+
+	// Create a timestamp if incoming event doesn't have one
+	this.timeStamp = src && src.timeStamp || Date.now();
+
+	// Mark it as fixed
+	this[ jQuery.expando ] = true;
+};
+
+// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
+// https://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
+jQuery.Event.prototype = {
+	constructor: jQuery.Event,
+	isDefaultPrevented: returnFalse,
+	isPropagationStopped: returnFalse,
+	isImmediatePropagationStopped: returnFalse,
+	isSimulated: false,
+
+	preventDefault: function() {
+		var e = this.originalEvent;
+
+		this.isDefaultPrevented = returnTrue;
+
+		if ( e && !this.isSimulated ) {
+			e.preventDefault();
+		}
+	},
+	stopPropagation: function() {
+		var e = this.originalEvent;
+
+		this.isPropagationStopped = returnTrue;
+
+		if ( e && !this.isSimulated ) {
+			e.stopPropagation();
+		}
+	},
+	stopImmediatePropagation: function() {
+		var e = this.originalEvent;
+
+		this.isImmediatePropagationStopped = returnTrue;
+
+		if ( e && !this.isSimulated ) {
+			e.stopImmediatePropagation();
+		}
+
+		this.stopPropagation();
+	}
+};
+
+// Includes all common event props including KeyEvent and MouseEvent specific props
+jQuery.each( {
+	altKey: true,
+	bubbles: true,
+	cancelable: true,
+	changedTouches: true,
+	ctrlKey: true,
+	detail: true,
+	eventPhase: true,
+	metaKey: true,
+	pageX: true,
+	pageY: true,
+	shiftKey: true,
+	view: true,
+	"char": true,
+	code: true,
+	charCode: true,
+	key: true,
+	keyCode: true,
+	button: true,
+	buttons: true,
+	clientX: true,
+	clientY: true,
+	offsetX: true,
+	offsetY: true,
+	pointerId: true,
+	pointerType: true,
+	screenX: true,
+	screenY: true,
+	targetTouches: true,
+	toElement: true,
+	touches: true,
+
+	which: function( event ) {
+		var button = event.button;
+
+		// Add which for key events
+		if ( event.which == null && rkeyEvent.test( event.type ) ) {
+			return event.charCode != null ? event.charCode : event.keyCode;
+		}
+
+		// Add which for click: 1 === left; 2 === middle; 3 === right
+		if ( !event.which && button !== undefined && rmouseEvent.test( event.type ) ) {
+			if ( button & 1 ) {
+				return 1;
+			}
+
+			if ( button & 2 ) {
+				return 3;
+			}
+
+			if ( button & 4 ) {
+				return 2;
+			}
+
+			return 0;
+		}
+
+		return event.which;
+	}
+}, jQuery.event.addProp );
+
+jQuery.each( { focus: "focusin", blur: "focusout" }, function( type, delegateType ) {
+	jQuery.event.special[ type ] = {
+
+		// Utilize native event if possible so blur/focus sequence is correct
+		setup: function() {
+
+			// Claim the first handler
+			// dataPriv.set( this, "focus", ... )
+			// dataPriv.set( this, "blur", ... )
+			leverageNative( this, type, expectSync );
+
+			// Return false to allow normal processing in the caller
+			return false;
+		},
+		trigger: function() {
+
+			// Force setup before trigger
+			leverageNative( this, type );
+
+			// Return non-false to allow normal event-path propagation
+			return true;
+		},
+
+		delegateType: delegateType
+	};
+} );
+
+// Create mouseenter/leave events using mouseover/out and event-time checks
+// so that event delegation works in jQuery.
+// Do the same for pointerenter/pointerleave and pointerover/pointerout
+//
+// Support: Safari 7 only
+// Safari sends mouseenter too often; see:
+// https://bugs.chromium.org/p/chromium/issues/detail?id=470258
+// for the description of the bug (it existed in older Chrome versions as well).
+jQuery.each( {
+	mouseenter: "mouseover",
+	mouseleave: "mouseout",
+	pointerenter: "pointerover",
+	pointerleave: "pointerout"
+}, function( orig, fix ) {
+	jQuery.event.special[ orig ] = {
+		delegateType: fix,
+		bindType: fix,
+
+		handle: function( event ) {
+			var ret,
+				target = this,
+				related = event.relatedTarget,
+				handleObj = event.handleObj;
+
+			// For mouseenter/leave call the handler if related is outside the target.
+			// NB: No relatedTarget if the mouse left/entered the browser window
+			if ( !related || ( related !== target && !jQuery.contains( target, related ) ) ) {
+				event.type = handleObj.origType;
+				ret = handleObj.handler.apply( this, arguments );
+				event.type = fix;
+			}
+			return ret;
+		}
+	};
+} );
+
+jQuery.fn.extend( {
+
+	on: function( types, selector, data, fn ) {
+		return on( this, types, selector, data, fn );
+	},
+	one: function( types, selector, data, fn ) {
+		return on( this, types, selector, data, fn, 1 );
+	},
+	off: function( types, selector, fn ) {
+		var handleObj, type;
+		if ( types && types.preventDefault && types.handleObj ) {
+
+			// ( event )  dispatched jQuery.Event
+			handleObj = types.handleObj;
+			jQuery( types.delegateTarget ).off(
+				handleObj.namespace ?
+					handleObj.origType + "." + handleObj.namespace :
+					handleObj.origType,
+				handleObj.selector,
+				handleObj.handler
+			);
+			return this;
+		}
+		if ( typeof types === "object" ) {
+
+			// ( types-object [, selector] )
+			for ( type in types ) {
+				this.off( type, selector, types[ type ] );
+			}
+			return this;
+		}
+		if ( selector === false || typeof selector === "function" ) {
+
+			// ( types [, fn] )
+			fn = selector;
+			selector = undefined;
+		}
+		if ( fn === false ) {
+			fn = returnFalse;
+		}
+		return this.each( function() {
+			jQuery.event.remove( this, types, fn, selector );
+		} );
+	}
+} );
+
+
+var
+
+	/* eslint-disable max-len */
+
+	// See https://github.com/eslint/eslint/issues/3229
+	rxhtmlTag = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([a-z][^\/\0>\x20\t\r\n\f]*)[^>]*)\/>/gi,
+
+	/* eslint-enable */
+
+	// Support: IE <=10 - 11, Edge 12 - 13 only
+	// In IE/Edge using regex groups here causes severe slowdowns.
+	// See https://connect.microsoft.com/IE/feedback/details/1736512/
+	rnoInnerhtml = /<script|<style|<link/i,
+
+	// checked="checked" or checked
+	rchecked = /checked\s*(?:[^=]|=\s*.checked.)/i,
+	rcleanScript = /^\s*<!(?:\[CDATA\[|--)|(?:\]\]|--)>\s*$/g;
+
+// Prefer a tbody over its parent table for containing new rows
+function manipulationTarget( elem, content ) {
+	if ( nodeName( elem, "table" ) &&
+		nodeName( content.nodeType !== 11 ? content : content.firstChild, "tr" ) ) {
+
+		return jQuery( elem ).children( "tbody" )[ 0 ] || elem;
+	}
+
+	return elem;
+}
+
+// Replace/restore the type attribute of script elements for safe DOM manipulation
+function disableScript( elem ) {
+	elem.type = ( elem.getAttribute( "type" ) !== null ) + "/" + elem.type;
+	return elem;
+}
+function restoreScript( elem ) {
+	if ( ( elem.type || "" ).slice( 0, 5 ) === "true/" ) {
+		elem.type = elem.type.slice( 5 );
+	} else {
+		elem.removeAttribute( "type" );
+	}
+
+	return elem;
+}
+
+function cloneCopyEvent( src, dest ) {
+	var i, l, type, pdataOld, pdataCur, udataOld, udataCur, events;
+
+	if ( dest.nodeType !== 1 ) {
+		return;
+	}
+
+	// 1. Copy private data: events, handlers, etc.
+	if ( dataPriv.hasData( src ) ) {
+		pdataOld = dataPriv.access( src );
+		pdataCur = dataPriv.set( dest, pdataOld );
+		events = pdataOld.events;
+
+		if ( events ) {
+			delete pdataCur.handle;
+			pdataCur.events = {};
+
+			for ( type in events ) {
+				for ( i = 0, l = events[ type ].length; i < l; i++ ) {
+					jQuery.event.add( dest, type, events[ type ][ i ] );
+				}
+			}
+		}
+	}
+
+	// 2. Copy user data
+	if ( dataUser.hasData( src ) ) {
+		udataOld = dataUser.access( src );
+		udataCur = jQuery.extend( {}, udataOld );
+
+		dataUser.set( dest, udataCur );
+	}
+}
+
+// Fix IE bugs, see support tests
+function fixInput( src, dest ) {
+	var nodeName = dest.nodeName.toLowerCase();
+
+	// Fails to persist the checked state of a cloned checkbox or radio button.
+	if ( nodeName === "input" && rcheckableType.test( src.type ) ) {
+		dest.checked = src.checked;
+
+	// Fails to return the selected option to the default selected state when cloning options
+	} else if ( nodeName === "input" || nodeName === "textarea" ) {
+		dest.defaultValue = src.defaultValue;
+	}
+}
+
+function domManip( collection, args, callback, ignored ) {
+
+	// Flatten any nested arrays
+	args = concat.apply( [], args );
+
+	var fragment, first, scripts, hasScripts, node, doc,
+		i = 0,
+		l = collection.length,
+		iNoClone = l - 1,
+		value = args[ 0 ],
+		valueIsFunction = isFunction( value );
+
+	// We can't cloneNode fragments that contain checked, in WebKit
+	if ( valueIsFunction ||
+			( l > 1 && typeof value === "string" &&
+				!support.checkClone && rchecked.test( value ) ) ) {
+		return collection.each( function( index ) {
+			var self = collection.eq( index );
+			if ( valueIsFunction ) {
+				args[ 0 ] = value.call( this, index, self.html() );
+			}
+			domManip( self, args, callback, ignored );
+		} );
+	}
+
+	if ( l ) {
+		fragment = buildFragment( args, collection[ 0 ].ownerDocument, false, collection, ignored );
+		first = fragment.firstChild;
+
+		if ( fragment.childNodes.length === 1 ) {
+			fragment = first;
+		}
+
+		// Require either new content or an interest in ignored elements to invoke the callback
+		if ( first || ignored ) {
+			scripts = jQuery.map( getAll( fragment, "script" ), disableScript );
+			hasScripts = scripts.length;
+
+			// Use the original fragment for the last item
+			// instead of the first because it can end up
+			// being emptied incorrectly in certain situations (#8070).
+			for ( ; i < l; i++ ) {
+				node = fragment;
+
+				if ( i !== iNoClone ) {
+					node = jQuery.clone( node, true, true );
+
+					// Keep references to cloned scripts for later restoration
+					if ( hasScripts ) {
+
+						// Support: Android <=4.0 only, PhantomJS 1 only
+						// push.apply(_, arraylike) throws on ancient WebKit
+						jQuery.merge( scripts, getAll( node, "script" ) );
+					}
+				}
+
+				callback.call( collection[ i ], node, i );
+			}
+
+			if ( hasScripts ) {
+				doc = scripts[ scripts.length - 1 ].ownerDocument;
+
+				// Reenable scripts
+				jQuery.map( scripts, restoreScript );
+
+				// Evaluate executable scripts on first document insertion
+				for ( i = 0; i < hasScripts; i++ ) {
+					node = scripts[ i ];
+					if ( rscriptType.test( node.type || "" ) &&
+						!dataPriv.access( node, "globalEval" ) &&
+						jQuery.contains( doc, node ) ) {
+
+						if ( node.src && ( node.type || "" ).toLowerCase()  !== "module" ) {
+
+							// Optional AJAX dependency, but won't run scripts if not present
+							if ( jQuery._evalUrl && !node.noModule ) {
+								jQuery._evalUrl( node.src, {
+									nonce: node.nonce || node.getAttribute( "nonce" )
+								} );
+							}
+						} else {
+							DOMEval( node.textContent.replace( rcleanScript, "" ), node, doc );
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return collection;
+}
+
+function remove( elem, selector, keepData ) {
+	var node,
+		nodes = selector ? jQuery.filter( selector, elem ) : elem,
+		i = 0;
+
+	for ( ; ( node = nodes[ i ] ) != null; i++ ) {
+		if ( !keepData && node.nodeType === 1 ) {
+			jQuery.cleanData( getAll( node ) );
+		}
+
+		if ( node.parentNode ) {
+			if ( keepData && isAttached( node ) ) {
+				setGlobalEval( getAll( node, "script" ) );
+			}
+			node.parentNode.removeChild( node );
+		}
+	}
+
+	return elem;
+}
+
+jQuery.extend( {
+	htmlPrefilter: function( html ) {
+		return html.replace( rxhtmlTag, "<$1></$2>" );
+	},
+
+	clone: function( elem, dataAndEvents, deepDataAndEvents ) {
+		var i, l, srcElements, destElements,
+			clone = elem.cloneNode( true ),
+			inPage = isAttached( elem );
+
+		// Fix IE cloning issues
+		if ( !support.noCloneChecked && ( elem.nodeType === 1 || elem.nodeType === 11 ) &&
+				!jQuery.isXMLDoc( elem ) ) {
+
+			// We eschew Sizzle here for performance reasons: https://jsperf.com/getall-vs-sizzle/2
+			destElements = getAll( clone );
+			srcElements = getAll( elem );
+
+			for ( i = 0, l = srcElements.length; i < l; i++ ) {
+				fixInput( srcElements[ i ], destElements[ i ] );
+			}
+		}
+
+		// Copy the events from the original to the clone
+		if ( dataAndEvents ) {
+			if ( deepDataAndEvents ) {
+				srcElements = srcElements || getAll( elem );
+				destElements = destElements || getAll( clone );
+
+				for ( i = 0, l = srcElements.length; i < l; i++ ) {
+					cloneCopyEvent( srcElements[ i ], destElements[ i ] );
+				}
+			} else {
+				cloneCopyEvent( elem, clone );
+			}
+		}
+
+		// Preserve script evaluation history
+		destElements = getAll( clone, "script" );
+		if ( destElements.length > 0 ) {
+			setGlobalEval( destElements, !inPage && getAll( elem, "script" ) );
+		}
+
+		// Return the cloned set
+		return clone;
+	},
+
+	cleanData: function( elems ) {
+		var data, elem, type,
+			special = jQuery.event.special,
+			i = 0;
+
+		for ( ; ( elem = elems[ i ] ) !== undefined; i++ ) {
+			if ( acceptData( elem ) ) {
+				if ( ( data = elem[ dataPriv.expando ] ) ) {
+					if ( data.events ) {
+						for ( type in data.events ) {
+							if ( special[ type ] ) {
+								jQuery.event.remove( elem, type );
+
+							// This is a shortcut to avoid jQuery.event.remove's overhead
+							} else {
+								jQuery.removeEvent( elem, type, data.handle );
+							}
+						}
+					}
+
+					// Support: Chrome <=35 - 45+
+					// Assign undefined instead of using delete, see Data#remove
+					elem[ dataPriv.expando ] = undefined;
+				}
+				if ( elem[ dataUser.expando ] ) {
+
+					// Support: Chrome <=35 - 45+
+					// Assign undefined instead of using delete, see Data#remove
+					elem[ dataUser.expando ] = undefined;
+				}
+			}
+		}
+	}
+} );
+
+jQuery.fn.extend( {
+	detach: function( selector ) {
+		return remove( this, selector, true );
+	},
+
+	remove: function( selector ) {
+		return remove( this, selector );
+	},
+
+	text: function( value ) {
+		return access( this, function( value ) {
+			return value === undefined ?
+				jQuery.text( this ) :
+				this.empty().each( function() {
+					if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+						this.textContent = value;
+					}
+				} );
+		}, null, value, arguments.length );
+	},
+
+	append: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+				var target = manipulationTarget( this, elem );
+				target.appendChild( elem );
+			}
+		} );
+	},
+
+	prepend: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.nodeType === 1 || this.nodeType === 11 || this.nodeType === 9 ) {
+				var target = manipulationTarget( this, elem );
+				target.insertBefore( elem, target.firstChild );
+			}
+		} );
+	},
+
+	before: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.parentNode ) {
+				this.parentNode.insertBefore( elem, this );
+			}
+		} );
+	},
+
+	after: function() {
+		return domManip( this, arguments, function( elem ) {
+			if ( this.parentNode ) {
+				this.parentNode.insertBefore( elem, this.nextSibling );
+			}
+		} );
+	},
+
+	empty: function() {
+		var elem,
+			i = 0;
+
+		for ( ; ( elem = this[ i ] ) != null; i++ ) {
+			if ( elem.nodeType === 1 ) {
+
+				// Prevent memory leaks
+				jQuery.cleanData( getAll( elem, false ) );
+
+				// Remove any remaining nodes
+				elem.textContent = "";
+			}
+		}
+
+		return this;
+	},
+
+	clone: function( dataAndEvents, deepDataAndEvents ) {
+		dataAndEvents = dataAndEvents == null ? false : dataAndEvents;
+		deepDataAndEvents = deepDataAndEvents == null ? dataAndEvents : deepDataAndEvents;
+
+		return this.map( function() {
+			return jQuery.clone( this, dataAndEvents, deepDataAndEvents );
+		} );
+	},
+
+	html: function( value ) {
+		return access( this, function( value ) {
+			var elem = this[ 0 ] || {},
+				i = 0,
+				l = this.length;
+
+			if ( value === undefined && elem.nodeType === 1 ) {
+				return elem.innerHTML;
+			}
+
+			// See if we can take a shortcut and just use innerHTML
+			if ( typeof value === "string" && !rnoInnerhtml.test( value ) &&
+				!wrapMap[ ( rtagName.exec( value ) || [ "", "" ] )[ 1 ].toLowerCase() ] ) {
+
+				value = jQuery.htmlPrefilter( value );
+
+				try {
+					for ( ; i < l; i++ ) {
+						elem = this[ i ] || {};
+
+						// Remove element nodes and prevent memory leaks
+						if ( elem.nodeType === 1 ) {
+							jQuery.cleanData( getAll( elem, false ) );
+							elem.innerHTML = value;
+						}
+					}
+
+					elem = 0;
+
+				// If using innerHTML throws an exception, use the fallback method
+				} catch ( e ) {}
+			}
+
+			if ( elem ) {
+				this.empty().append( value );
+			}
+		}, null, value, arguments.length );
+	},
+
+	replaceWith: function() {
+		var ignored = [];
+
+		// Make the changes, replacing each non-ignored context element with the new content
+		return domManip( this, arguments, function( elem ) {
+			var parent = this.parentNode;
+
+			if ( jQuery.inArray( this, ignored ) < 0 ) {
+				jQuery.cleanData( getAll( this ) );
+				if ( parent ) {
+					parent.replaceChild( elem, this );
+				}
+			}
+
+		// Force callback invocation
+		}, ignored );
+	}
+} );
+
+jQuery.each( {
+	appendTo: "append",
+	prependTo: "prepend",
+	insertBefore: "before",
+	insertAfter: "after",
+	replaceAll: "replaceWith"
+}, function( name, original ) {
+	jQuery.fn[ name ] = function( selector ) {
+		var elems,
+			ret = [],
+			insert = jQuery( selector ),
+			last = insert.length - 1,
+			i = 0;
+
+		for ( ; i <= last; i++ ) {
+			elems = i === last ? this : this.clone( true );
+			jQuery( insert[ i ] )[ original ]( elems );
+
+			// Support: Android <=4.0 only, PhantomJS 1 only
+			// .get() because push.apply(_, arraylike) throws on ancient WebKit
+			push.apply( ret, elems.get() );
+		}
+
+		return this.pushStack( ret );
+	};
+} );
+var rnumnonpx = new RegExp( "^(" + pnum + ")(?!px)[a-z%]+$", "i" );
+
+var getStyles = function( elem ) {
+
+		// Support: IE <=11 only, Firefox <=30 (#15098, #14150)
+		// IE throws on elements created in popups
+		// FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
+		var view = elem.ownerDocument.defaultView;
+
+		if ( !view || !view.opener ) {
+			view = window;
+		}
+
+		return view.getComputedStyle( elem );
+	};
+
+var rboxStyle = new RegExp( cssExpand.join( "|" ), "i" );
+
+
+
+( function() {
+
+	// Executing both pixelPosition & boxSizingReliable tests require only one layout
+	// so they're executed at the same time to save the second computation.
+	function computeStyleTests() {
+
+		// This is a singleton, we need to execute it only once
+		if ( !div ) {
+			return;
+		}
+
+		container.style.cssText = "position:absolute;left:-11111px;width:60px;" +
+			"margin-top:1px;padding:0;border:0";
+		div.style.cssText =
+			"position:relative;display:block;box-sizing:border-box;overflow:scroll;" +
+			"margin:auto;border:1px;padding:1px;" +
+			"width:60%;top:1%";
+		documentElement.appendChild( container ).appendChild( div );
+
+		var divStyle = window.getComputedStyle( div );
+		pixelPositionVal = divStyle.top !== "1%";
+
+		// Support: Android 4.0 - 4.3 only, Firefox <=3 - 44
+		reliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;
+
+		// Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3
+		// Some styles come back with percentage values, even though they shouldn't
+		div.style.right = "60%";
+		pixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;
+
+		// Support: IE 9 - 11 only
+		// Detect misreporting of content dimensions for box-sizing:border-box elements
+		boxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;
+
+		// Support: IE 9 only
+		// Detect overflow:scroll screwiness (gh-3699)
+		// Support: Chrome <=64
+		// Don't get tricked when zoom affects offsetWidth (gh-4029)
+		div.style.position = "absolute";
+		scrollboxSizeVal = roundPixelMeasures( div.offsetWidth / 3 ) === 12;
+
+		documentElement.removeChild( container );
+
+		// Nullify the div so it wouldn't be stored in the memory and
+		// it will also be a sign that checks already performed
+		div = null;
+	}
+
+	function roundPixelMeasures( measure ) {
+		return Math.round( parseFloat( measure ) );
+	}
+
+	var pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,
+		reliableMarginLeftVal,
+		container = document.createElement( "div" ),
+		div = document.createElement( "div" );
+
+	// Finish early in limited (non-browser) environments
+	if ( !div.style ) {
+		return;
+	}
+
+	// Support: IE <=9 - 11 only
+	// Style of cloned element affects source element cloned (#8908)
+	div.style.backgroundClip = "content-box";
+	div.cloneNode( true ).style.backgroundClip = "";
+	support.clearCloneStyle = div.style.backgroundClip === "content-box";
+
+	jQuery.extend( support, {
+		boxSizingReliable: function() {
+			computeStyleTests();
+			return boxSizingReliableVal;
+		},
+		pixelBoxStyles: function() {
+			computeStyleTests();
+			return pixelBoxStylesVal;
+		},
+		pixelPosition: function() {
+			computeStyleTests();
+			return pixelPositionVal;
+		},
+		reliableMarginLeft: function() {
+			computeStyleTests();
+			return reliableMarginLeftVal;
+		},
+		scrollboxSize: function() {
+			computeStyleTests();
+			return scrollboxSizeVal;
+		}
+	} );
+} )();
+
+
+function curCSS( elem, name, computed ) {
+	var width, minWidth, maxWidth, ret,
+
+		// Support: Firefox 51+
+		// Retrieving style before computed somehow
+		// fixes an issue with getting wrong values
+		// on detached elements
+		style = elem.style;
+
+	computed = computed || getStyles( elem );
+
+	// getPropertyValue is needed for:
+	//   .css('filter') (IE 9 only, #12537)
+	//   .css('--customProperty) (#3144)
+	if ( computed ) {
+		ret = computed.getPropertyValue( name ) || computed[ name ];
+
+		if ( ret === "" && !isAttached( elem ) ) {
+			ret = jQuery.style( elem, name );
+		}
+
+		// A tribute to the "awesome hack by Dean Edwards"
+		// Android Browser returns percentage for some values,
+		// but width seems to be reliably pixels.
+		// This is against the CSSOM draft spec:
+		// https://drafts.csswg.org/cssom/#resolved-values
+		if ( !support.pixelBoxStyles() && rnumnonpx.test( ret ) && rboxStyle.test( name ) ) {
+
+			// Remember the original values
+			width = style.width;
+			minWidth = style.minWidth;
+			maxWidth = style.maxWidth;
+
+			// Put in the new values to get a computed value out
+			style.minWidth = style.maxWidth = style.width = ret;
+			ret = computed.width;
+
+			// Revert the changed values
+			style.width = width;
+			style.minWidth = minWidth;
+			style.maxWidth = maxWidth;
+		}
+	}
+
+	return ret !== undefined ?
+
+		// Support: IE <=9 - 11 only
+		// IE returns zIndex value as an integer.
+		ret + "" :
+		ret;
+}
+
+
+function addGetHookIf( conditionFn, hookFn ) {
+
+	// Define the hook, we'll check on the first run if it's really needed.
+	return {
+		get: function() {
+			if ( conditionFn() ) {
+
+				// Hook not needed (or it's not possible to use it due
+				// to missing dependency), remove it.
+				delete this.get;
+				return;
+			}
+
+			// Hook needed; redefine it so that the support test is not executed again.
+			return ( this.get = hookFn ).apply( this, arguments );
+		}
+	};
+}
+
+
+var cssPrefixes = [ "Webkit", "Moz", "ms" ],
+	emptyStyle = document.createElement( "div" ).style,
+	vendorProps = {};
+
+// Return a vendor-prefixed property or undefined
+function vendorPropName( name ) {
+
+	// Check for vendor prefixed names
+	var capName = name[ 0 ].toUpperCase() + name.slice( 1 ),
+		i = cssPrefixes.length;
+
+	while ( i-- ) {
+		name = cssPrefixes[ i ] + capName;
+		if ( name in emptyStyle ) {
+			return name;
+		}
+	}
+}
+
+// Return a potentially-mapped jQuery.cssProps or vendor prefixed property
+function finalPropName( name ) {
+	var final = jQuery.cssProps[ name ] || vendorProps[ name ];
+
+	if ( final ) {
+		return final;
+	}
+	if ( name in emptyStyle ) {
+		return name;
+	}
+	return vendorProps[ name ] = vendorPropName( name ) || name;
+}
+
+
+var
+
+	// Swappable if display is none or starts with table
+	// except "table", "table-cell", or "table-caption"
+	// See here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
+	rdisplayswap = /^(none|table(?!-c[ea]).+)/,
+	rcustomProp = /^--/,
+	cssShow = { position: "absolute", visibility: "hidden", display: "block" },
+	cssNormalTransform = {
+		letterSpacing: "0",
+		fontWeight: "400"
+	};
+
+function setPositiveNumber( elem, value, subtract ) {
+
+	// Any relative (+/-) values have already been
+	// normalized at this point
+	var matches = rcssNum.exec( value );
+	return matches ?
+
+		// Guard against undefined "subtract", e.g., when used as in cssHooks
+		Math.max( 0, matches[ 2 ] - ( subtract || 0 ) ) + ( matches[ 3 ] || "px" ) :
+		value;
+}
+
+function boxModelAdjustment( elem, dimension, box, isBorderBox, styles, computedVal ) {
+	var i = dimension === "width" ? 1 : 0,
+		extra = 0,
+		delta = 0;
+
+	// Adjustment may not be necessary
+	if ( box === ( isBorderBox ? "border" : "content" ) ) {
+		return 0;
+	}
+
+	for ( ; i < 4; i += 2 ) {
+
+		// Both box models exclude margin
+		if ( box === "margin" ) {
+			delta += jQuery.css( elem, box + cssExpand[ i ], true, styles );
+		}
+
+		// If we get here with a content-box, we're seeking "padding" or "border" or "margin"
+		if ( !isBorderBox ) {
+
+			// Add padding
+			delta += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
+
+			// For "border" or "margin", add border
+			if ( box !== "padding" ) {
+				delta += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+
+			// But still keep track of it otherwise
+			} else {
+				extra += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+			}
+
+		// If we get here with a border-box (content + padding + border), we're seeking "content" or
+		// "padding" or "margin"
+		} else {
+
+			// For "content", subtract padding
+			if ( box === "content" ) {
+				delta -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
+			}
+
+			// For "content" or "padding", subtract border
+			if ( box !== "margin" ) {
+				delta -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
+			}
+		}
+	}
+
+	// Account for positive content-box scroll gutter when requested by providing computedVal
+	if ( !isBorderBox && computedVal >= 0 ) {
+
+		// offsetWidth/offsetHeight is a rounded sum of content, padding, scroll gutter, and border
+		// Assuming integer scroll gutter, subtract the rest and round down
+		delta += Math.max( 0, Math.ceil(
+			elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
+			computedVal -
+			delta -
+			extra -
+			0.5
+
+		// If offsetWidth/offsetHeight is unknown, then we can't determine content-box scroll gutter
+		// Use an explicit zero to avoid NaN (gh-3964)
+		) ) || 0;
+	}
+
+	return delta;
+}
+
+function getWidthOrHeight( elem, dimension, extra ) {
+
+	// Start with computed style
+	var styles = getStyles( elem ),
+
+		// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-4322).
+		// Fake content-box until we know it's needed to know the true value.
+		boxSizingNeeded = !support.boxSizingReliable() || extra,
+		isBorderBox = boxSizingNeeded &&
+			jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+		valueIsBorderBox = isBorderBox,
+
+		val = curCSS( elem, dimension, styles ),
+		offsetProp = "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );
+
+	// Support: Firefox <=54
+	// Return a confounding non-pixel value or feign ignorance, as appropriate.
+	if ( rnumnonpx.test( val ) ) {
+		if ( !extra ) {
+			return val;
+		}
+		val = "auto";
+	}
+
+
+	// Fall back to offsetWidth/offsetHeight when value is "auto"
+	// This happens for inline elements with no explicit setting (gh-3571)
+	// Support: Android <=4.1 - 4.3 only
+	// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)
+	// Support: IE 9-11 only
+	// Also use offsetWidth/offsetHeight for when box sizing is unreliable
+	// We use getClientRects() to check for hidden/disconnected.
+	// In those cases, the computed value can be trusted to be border-box
+	if ( ( !support.boxSizingReliable() && isBorderBox ||
+		val === "auto" ||
+		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) &&
+		elem.getClientRects().length ) {
+
+		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box";
+
+		// Where available, offsetWidth/offsetHeight approximate border box dimensions.
+		// Where not available (e.g., SVG), assume unreliable box-sizing and interpret the
+		// retrieved value as a content box dimension.
+		valueIsBorderBox = offsetProp in elem;
+		if ( valueIsBorderBox ) {
+			val = elem[ offsetProp ];
+		}
+	}
+
+	// Normalize "" and auto
+	val = parseFloat( val ) || 0;
+
+	// Adjust for the element's box model
+	return ( val +
+		boxModelAdjustment(
+			elem,
+			dimension,
+			extra || ( isBorderBox ? "border" : "content" ),
+			valueIsBorderBox,
+			styles,
+
+			// Provide the current computed size to request scroll gutter calculation (gh-3589)
+			val
+		)
+	) + "px";
+}
+
+jQuery.extend( {
+
+	// Add in style property hooks for overriding the default
+	// behavior of getting and setting a style property
+	cssHooks: {
+		opacity: {
+			get: function( elem, computed ) {
+				if ( computed ) {
+
+					// We should always get a number back from opacity
+					var ret = curCSS( elem, "opacity" );
+					return ret === "" ? "1" : ret;
+				}
+			}
+		}
+	},
+
+	// Don't automatically add "px" to these possibly-unitless properties
+	cssNumber: {
+		"animationIterationCount": true,
+		"columnCount": true,
+		"fillOpacity": true,
+		"flexGrow": true,
+		"flexShrink": true,
+		"fontWeight": true,
+		"gridArea": true,
+		"gridColumn": true,
+		"gridColumnEnd": true,
+		"gridColumnStart": true,
+		"gridRow": true,
+		"gridRowEnd": true,
+		"gridRowStart": true,
+		"lineHeight": true,
+		"opacity": true,
+		"order": true,
+		"orphans": true,
+		"widows": true,
+		"zIndex": true,
+		"zoom": true
+	},
+
+	// Add in properties whose names you wish to fix before
+	// setting or getting the value
+	cssProps: {},
+
+	// Get and set the style property on a DOM Node
+	style: function( elem, name, value, extra ) {
+
+		// Don't set styles on text and comment nodes
+		if ( !elem || elem.nodeType === 3 || elem.nodeType === 8 || !elem.style ) {
+			return;
+		}
+
+		// Make sure that we're working with the right name
+		var ret, type, hooks,
+			origName = camelCase( name ),
+			isCustomProp = rcustomProp.test( name ),
+			style = elem.style;
+
+		// Make sure that we're working with the right name. We don't
+		// want to query the value if it is a CSS custom property
+		// since they are user-defined.
+		if ( !isCustomProp ) {
+			name = finalPropName( origName );
+		}
+
+		// Gets hook for the prefixed version, then unprefixed version
+		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
+
+		// Check if we're setting a value
+		if ( value !== undefined ) {
+			type = typeof value;
+
+			// Convert "+=" or "-=" to relative numbers (#7345)
+			if ( type === "string" && ( ret = rcssNum.exec( value ) ) && ret[ 1 ] ) {
+				value = adjustCSS( elem, name, ret );
+
+				// Fixes bug #9237
+				type = "number";
+			}
+
+			// Make sure that null and NaN values aren't set (#7116)
+			if ( value == null || value !== value ) {
+				return;
+			}
+
+			// If a number was passed in, add the unit (except for certain CSS properties)
+			// The isCustomProp check can be removed in jQuery 4.0 when we only auto-append
+			// "px" to a few hardcoded values.
+			if ( type === "number" && !isCustomProp ) {
+				value += ret && ret[ 3 ] || ( jQuery.cssNumber[ origName ] ? "" : "px" );
+			}
+
+			// background-* props affect original clone's values
+			if ( !support.clearCloneStyle && value === "" && name.indexOf( "background" ) === 0 ) {
+				style[ name ] = "inherit";
+			}
+
+			// If a hook was provided, use that value, otherwise just set the specified value
+			if ( !hooks || !( "set" in hooks ) ||
+				( value = hooks.set( elem, value, extra ) ) !== undefined ) {
+
+				if ( isCustomProp ) {
+					style.setProperty( name, value );
+				} else {
+					style[ name ] = value;
+				}
+			}
+
+		} else {
+
+			// If a hook was provided get the non-computed value from there
+			if ( hooks && "get" in hooks &&
+				( ret = hooks.get( elem, false, extra ) ) !== undefined ) {
+
+				return ret;
+			}
+
+			// Otherwise just get the value from the style object
+			return style[ name ];
+		}
+	},
+
+	css: function( elem, name, extra, styles ) {
+		var val, num, hooks,
+			origName = camelCase( name ),
+			isCustomProp = rcustomProp.test( name );
+
+		// Make sure that we're working with the right name. We don't
+		// want to modify the value if it is a CSS custom property
+		// since they are user-defined.
+		if ( !isCustomProp ) {
+			name = finalPropName( origName );
+		}
+
+		// Try prefixed name followed by the unprefixed name
+		hooks = jQuery.cssHooks[ name ] || jQuery.cssHooks[ origName ];
+
+		// If a hook was provided get the computed value from there
+		if ( hooks && "get" in hooks ) {
+			val = hooks.get( elem, true, extra );
+		}
+
+		// Otherwise, if a way to get the computed value exists, use that
+		if ( val === undefined ) {
+			val = curCSS( elem, name, styles );
+		}
+
+		// Convert "normal" to computed value
+		if ( val === "normal" && name in cssNormalTransform ) {
+			val = cssNormalTransform[ name ];
+		}
+
+		// Make numeric if forced or a qualifier was provided and val looks numeric
+		if ( extra === "" || extra ) {
+			num = parseFloat( val );
+			return extra === true || isFinite( num ) ? num || 0 : val;
+		}
+
+		return val;
+	}
+} );
+
+jQuery.each( [ "height", "width" ], function( i, dimension ) {
+	jQuery.cssHooks[ dimension ] = {
+		get: function( elem, computed, extra ) {
+			if ( computed ) {
+
+				// Certain elements can have dimension info if we invisibly show them
+				// but it must have a current display style that would benefit
+				return rdisplayswap.test( jQuery.css( elem, "display" ) ) &&
+
+					// Support: Safari 8+
+					// Table columns in Safari have non-zero offsetWidth & zero
+					// getBoundingClientRect().width unless display is changed.
+					// Support: IE <=11 only
+					// Running getBoundingClientRect on a disconnected node
+					// in IE throws an error.
+					( !elem.getClientRects().length || !elem.getBoundingClientRect().width ) ?
+						swap( elem, cssShow, function() {
+							return getWidthOrHeight( elem, dimension, extra );
+						} ) :
+						getWidthOrHeight( elem, dimension, extra );
+			}
+		},
+
+		set: function( elem, value, extra ) {
+			var matches,
+				styles = getStyles( elem ),
+
+				// Only read styles.position if the test has a chance to fail
+				// to avoid forcing a reflow.
+				scrollboxSizeBuggy = !support.scrollboxSize() &&
+					styles.position === "absolute",
+
+				// To avoid forcing a reflow, only fetch boxSizing if we need it (gh-3991)
+				boxSizingNeeded = scrollboxSizeBuggy || extra,
+				isBorderBox = boxSizingNeeded &&
+					jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
+				subtract = extra ?
+					boxModelAdjustment(
+						elem,
+						dimension,
+						extra,
+						isBorderBox,
+						styles
+					) :
+					0;
+
+			// Account for unreliable border-box dimensions by comparing offset* to computed and
+			// faking a content-box to get border and padding (gh-3699)
+			if ( isBorderBox && scrollboxSizeBuggy ) {
+				subtract -= Math.ceil(
+					elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] -
+					parseFloat( styles[ dimension ] ) -
+					boxModelAdjustment( elem, dimension, "border", false, styles ) -
+					0.5
+				);
+			}
+
+			// Convert to pixels if value adjustment is needed
+			if ( subtract && ( matches = rcssNum.exec( value ) ) &&
+				( matches[ 3 ] || "px" ) !== "px" ) {
+
+				elem.style[ dimension ] = value;
+				value = jQuery.css( elem, dimension );
+			}
+
+			return setPositiveNumber( elem, value, subtract );
+		}
+	};
+} );
+
+jQuery.cssHooks.marginLeft = addGetHookIf( support.reliableMarginLeft,
+	function( elem, computed ) {
+		if ( computed ) {
+			return ( parseFloat( curCSS( elem, "marginLeft" ) ) ||
+				elem.getBoundingClientRect().left -
+					swap( elem, { marginLeft: 0 }, function() {
+						return elem.getBoundingClientRect().left;
+					} )
+				) + "px";
+		}
+	}
+);
+
+// These hooks are used by animate to expand properties
+jQuery.each( {
+	margin: "",
+	padding: "",
+	border: "Width"
+}, function( prefix, suffix ) {
+	jQuery.cssHooks[ prefix + suffix ] = {
+		expand: function( value ) {
+			var i = 0,
+				expanded = {},
+
+				// Assumes a single number if not a string
+				parts = typeof value === "string" ? value.split( " " ) : [ value ];
+
+			for ( ; i < 4; i++ ) {
+				expanded[ prefix + cssExpand[ i ] + suffix ] =
+					parts[ i ] || parts[ i - 2 ] || parts[ 0 ];
+			}
+
+			return expanded;
+		}
+	};
+
+	if ( prefix !== "margin" ) {
+		jQuery.cssHooks[ prefix + suffix ].set = setPositiveNumber;
+	}
+} );
+
+jQuery.fn.extend( {
+	css: function( name, value ) {
+		return access( this, function( elem, name, value ) {
+			var styles, len,
+				map = {},
+				i = 0;
+
+			if ( Array.isArray( name ) ) {
+				styles = getStyles( elem );
+				len = name.length;
+
+				for ( ; i < len; i++ ) {
+					map[ name[ i ] ] = jQuery.css( elem, name[ i ], false, styles );
+				}
+
+				return map;
+			}
+
+			return value !== undefined ?
+				jQuery.style( elem, name, value ) :
+				jQuery.css( elem, name );
+		}, name, value, arguments.length > 1 );
+	}
+} );
+
+
+function Tween( elem, options, prop, end, easing ) {
+	return new Tween.prototype.init( elem, options, prop, end, easing );
+}
+jQuery.Tween = Tween;
+
+Tween.prototype = {
+	constructor: Tween,
+	init: function( elem, options, prop, end, easing, unit ) {
+		this.elem = elem;
+		this.prop = prop;
+		this.easing = easing || jQuery.easing._default;
+		this.options = options;
+		this.start = this.now = this.cur();
+		this.end = end;
+		this.unit = unit || ( jQuery.cssNumber[ prop ] ? "" : "px" );
+	},
+	cur: function() {
+		var hooks = Tween.propHooks[ this.prop ];
+
+		return hooks && hooks.get ?
+			hooks.get( this ) :
+			Tween.propHooks._default.get( this );
+	},
+	run: function( percent ) {
+		var eased,
+			hooks = Tween.propHooks[ this.prop ];
+
+		if ( this.options.duration ) {
+			this.pos = eased = jQuery.easing[ this.easing ](
+				percent, this.options.duration * percent, 0, 1, this.options.duration
+			);
+		} else {
+			this.pos = eased = percent;
+		}
+		this.now = ( this.end - this.start ) * eased + this.start;
+
+		if ( this.options.step ) {
+			this.options.step.call( this.elem, this.now, this );
+		}
+
+		if ( hooks && hooks.set ) {
+			hooks.set( this );
+		} else {
+			Tween.propHooks._default.set( this );
+		}
+		return this;
+	}
+};
+
+Tween.prototype.init.prototype = Tween.prototype;
+
+Tween.propHooks = {
+	_default: {
+		get: function( tween ) {
+			var result;
+
+			// Use a property on the element directly when it is not a DOM element,
+			// or when there is no matching style property that exists.
+			if ( tween.elem.nodeType !== 1 ||
+				tween.elem[ tween.prop ] != null && tween.elem.style[ tween.prop ] == null ) {
+				return tween.elem[ tween.prop ];
+			}
+
+			// Passing an empty string as a 3rd parameter to .css will automatically
+			// attempt a parseFloat and fallback to a string if the parse fails.
+			// Simple values such as "10px" are parsed to Float;
+			// complex values such as "rotate(1rad)" are returned as-is.
+			result = jQuery.css( tween.elem, tween.prop, "" );
+
+			// Empty strings, null, undefined and "auto" are converted to 0.
+			return !result || result === "auto" ? 0 : result;
+		},
+		set: function( tween ) {
+
+			// Use step hook for back compat.
+			// Use cssHook if its there.
+			// Use .style if available and use plain properties where available.
+			if ( jQuery.fx.step[ tween.prop ] ) {
+				jQuery.fx.step[ tween.prop ]( tween );
+			} else if ( tween.elem.nodeType === 1 && (
+					jQuery.cssHooks[ tween.prop ] ||
+					tween.elem.style[ finalPropName( tween.prop ) ] != null ) ) {
+				jQuery.style( tween.elem, tween.prop, tween.now + tween.unit );
+			} else {
+				tween.elem[ tween.prop ] = tween.now;
+			}
+		}
+	}
+};
+
+// Support: IE <=9 only
+// Panic based approach to setting things on disconnected nodes
+Tween.propHooks.scrollTop = Tween.propHooks.scrollLeft = {
+	set: function( tween ) {
+		if ( tween.elem.nodeType && tween.elem.parentNode ) {
+			tween.elem[ tween.prop ] = tween.now;
+		}
+	}
+};
+
+jQuery.easing = {
+	linear: function( p ) {
+		return p;
+	},
+	swing: function( p ) {
+		return 0.5 - Math.cos( p * Math.PI ) / 2;
+	},
+	_default: "swing"
+};
+
+jQuery.fx = Tween.prototype.init;
+
+// Back compat <1.8 extension point
+jQuery.fx.step = {};
+
+
+
+
+var
+	fxNow, inProgress,
+	rfxtypes = /^(?:toggle|show|hide)$/,
+	rrun = /queueHooks$/;
+
+function schedule() {
+	if ( inProgress ) {
+		if ( document.hidden === false && window.requestAnimationFrame ) {
+			window.requestAnimationFrame( schedule );
+		} else {
+			window.setTimeout( schedule, jQuery.fx.interval );
+		}
+
+		jQuery.fx.tick();
+	}
+}
+
+// Animations created synchronously will run synchronously
+function createFxNow() {
+	window.setTimeout( function() {
+		fxNow = undefined;
+	} );
+	return ( fxNow = Date.now() );
+}
+
+// Generate parameters to create a standard animation
+function genFx( type, includeWidth ) {
+	var which,
+		i = 0,
+		attrs = { height: type };
+
+	// If we include width, step value is 1 to do all cssExpand values,
+	// otherwise step value is 2 to skip over Left and Right
+	includeWidth = includeWidth ? 1 : 0;
+	for ( ; i < 4; i += 2 - includeWidth ) {
+		which = cssExpand[ i ];
+		attrs[ "margin" + which ] = attrs[ "padding" + which ] = type;
+	}
+
+	if ( includeWidth ) {
+		attrs.opacity = attrs.width = type;
+	}
+
+	return attrs;
+}
+
+function createTween( value, prop, animation ) {
+	var tween,
+		collection = ( Animation.tweeners[ prop ] || [] ).concat( Animation.tweeners[ "*" ] ),
+		index = 0,
+		length = collection.length;
+	for ( ; index < length; index++ ) {
+		if ( ( tween = collection[ index ].call( animation, prop, value ) ) ) {
+
+			// We're done with this property
+			return tween;
+		}
+	}
+}
+
+function defaultPrefilter( elem, props, opts ) {
+	var prop, value, toggle, hooks, oldfire, propTween, restoreDisplay, display,
+		isBox = "width" in props || "height" in props,
+		anim = this,
+		orig = {},
+		style = elem.style,
+		hidden = elem.nodeType && isHiddenWithinTree( elem ),
+		dataShow = dataPriv.get( elem, "fxshow" );
+
+	// Queue-skipping animations hijack the fx hooks
+	if ( !opts.queue ) {
+		hooks = jQuery._queueHooks( elem, "fx" );
+		if ( hooks.unqueued == null ) {
+			hooks.unqueued = 0;
+			oldfire = hooks.empty.fire;
+			hooks.empty.fire = function() {
+				if ( !hooks.unqueued ) {
+					oldfire();
+				}
+			};
+		}
+		hooks.unqueued++;
+
+		anim.always( function() {
+
+			// Ensure the complete handler is called before this completes
+			anim.always( function() {
+				hooks.unqueued--;
+				if ( !jQuery.queue( elem, "fx" ).length ) {
+					hooks.empty.fire();
+				}
+			} );
+		} );
+	}
+
+	// Detect show/hide animations
+	for ( prop in props ) {
+		value = props[ prop ];
+		if ( rfxtypes.test( value ) ) {
+			delete props[ prop ];
+			toggle = toggle || value === "toggle";
+			if ( value === ( hidden ? "hide" : "show" ) ) {
+
+				// Pretend to be hidden if this is a "show" and
+				// there is still data from a stopped show/hide
+				if ( value === "show" && dataShow && dataShow[ prop ] !== undefined ) {
+					hidden = true;
+
+				// Ignore all other no-op show/hide data
+				} else {
+					continue;
+				}
+			}
+			orig[ prop ] = dataShow && dataShow[ prop ] || jQuery.style( elem, prop );
+		}
+	}
+
+	// Bail out if this is a no-op like .hide().hide()
+	propTween = !jQuery.isEmptyObject( props );
+	if ( !propTween && jQuery.isEmptyObject( orig ) ) {
+		return;
+	}
+
+	// Restrict "overflow" and "display" styles during box animations
+	if ( isBox && elem.nodeType === 1 ) {
+
+		// Support: IE <=9 - 11, Edge 12 - 15
+		// Record all 3 overflow attributes because IE does not infer the shorthand
+		// from identically-valued overflowX and overflowY and Edge just mirrors
+		// the overflowX value there.
+		opts.overflow = [ style.overflow, style.overflowX, style.overflowY ];
+
+		// Identify a display type, preferring old show/hide data over the CSS cascade
+		restoreDisplay = dataShow && dataShow.display;
+		if ( restoreDisplay == null ) {
+			restoreDisplay = dataPriv.get( elem, "display" );
+		}
+		display = jQuery.css( elem, "display" );
+		if ( display === "none" ) {
+			if ( restoreDisplay ) {
+				display = restoreDisplay;
+			} else {
+
+				// Get nonempty value(s) by temporarily forcing visibility
+				showHide( [ elem ], true );
+				restoreDisplay = elem.style.display || restoreDisplay;
+				display = jQuery.css( elem, "display" );
+				showHide( [ elem ] );
+			}
+		}
+
+		// Animate inline elements as inline-block
+		if ( display === "inline" || display === "inline-block" && restoreDisplay != null ) {
+			if ( jQuery.css( elem, "float" ) === "none" ) {
+
+				// Restore the original display value at the end of pure show/hide animations
+				if ( !propTween ) {
+					anim.done( function() {
+						style.display = restoreDisplay;
+					} );
+					if ( restoreDisplay == null ) {
+						display = style.display;
+						restoreDisplay = display === "none" ? "" : display;
+					}
+				}
+				style.display = "inline-block";
+			}
+		}
+	}
+
+	if ( opts.overflow ) {
+		style.overflow = "hidden";
+		anim.always( function() {
+			style.overflow = opts.overflow[ 0 ];
+			style.overflowX = opts.overflow[ 1 ];
+			style.overflowY = opts.overflow[ 2 ];
+		} );
+	}
+
+	// Implement show/hide animations
+	propTween = false;
+	for ( prop in orig ) {
+
+		// General show/hide setup for this element animation
+		if ( !propTween ) {
+			if ( dataShow ) {
+				if ( "hidden" in dataShow ) {
+					hidden = dataShow.hidden;
+				}
+			} else {
+				dataShow = dataPriv.access( elem, "fxshow", { display: restoreDisplay } );
+			}
+
+			// Store hidden/visible for toggle so `.stop().toggle()` "reverses"
+			if ( toggle ) {
+				dataShow.hidden = !hidden;
+			}
+
+			// Show elements before animating them
+			if ( hidden ) {
+				showHide( [ elem ], true );
+			}
+
+			/* eslint-disable no-loop-func */
+
+			anim.done( function() {
+
+			/* eslint-enable no-loop-func */
+
+				// The final step of a "hide" animation is actually hiding the element
+				if ( !hidden ) {
+					showHide( [ elem ] );
+				}
+				dataPriv.remove( elem, "fxshow" );
+				for ( prop in orig ) {
+					jQuery.style( elem, prop, orig[ prop ] );
+				}
+			} );
+		}
+
+		// Per-property setup
+		propTween = createTween( hidden ? dataShow[ prop ] : 0, prop, anim );
+		if ( !( prop in dataShow ) ) {
+			dataShow[ prop ] = propTween.start;
+			if ( hidden ) {
+				propTween.end = propTween.start;
+				propTween.start = 0;
+			}
+		}
+	}
+}
+
+function propFilter( props, specialEasing ) {
+	var index, name, easing, value, hooks;
+
+	// camelCase, specialEasing and expand cssHook pass
+	for ( index in props ) {
+		name = camelCase( index );
+		easing = specialEasing[ name ];
+		value = props[ index ];
+		if ( Array.isArray( value ) ) {
+			easing = value[ 1 ];
+			value = props[ index ] = value[ 0 ];
+		}
+
+		if ( index !== name ) {
+			props[ name ] = value;
+			delete props[ index ];
+		}
+
+		hooks = jQuery.cssHooks[ name ];
+		if ( hooks && "expand" in hooks ) {
+			value = hooks.expand( value );
+			delete props[ name ];
+
+			// Not quite $.extend, this won't overwrite existing keys.
+			// Reusing 'index' because we have the correct "name"
+			for ( index in value ) {
+				if ( !( index in props ) ) {
+					props[ index ] = value[ index ];
+					specialEasing[ index ] = easing;
+				}
+			}
+		} else {
+			specialEasing[ name ] = easing;
+		}
+	}
+}
+
+function Animation( elem, properties, options ) {
+	var result,
+		stopped,
+		index = 0,
+		length = Animation.prefilters.length,
+		deferred = jQuery.Deferred().always( function() {
+
+			// Don't match elem in the :animated selector
+			delete tick.elem;
+		} ),
+		tick = function() {
+			if ( stopped ) {
+				return false;
+			}
+			var currentTime = fxNow || createFxNow(),
+				remaining = Math.max( 0, animation.startTime + animation.duration - currentTime ),
+
+				// Support: Android 2.3 only
+				// Archaic crash bug won't allow us to use `1 - ( 0.5 || 0 )` (#12497)
+				temp = remaining / animation.duration || 0,
+				percent = 1 - temp,
+				index = 0,
+				length = animation.tweens.length;
+
+			for ( ; index < length; index++ ) {
+				animation.tweens[ index ].run( percent );
+			}
+
+			deferred.notifyWith( elem, [ animation, percent, remaining ] );
+
+			// If there's more to do, yield
+			if ( percent < 1 && length ) {
+				return remaining;
+			}
+
+			// If this was an empty animation, synthesize a final progress notification
+			if ( !length ) {
+				deferred.notifyWith( elem, [ animation, 1, 0 ] );
+			}
+
+			// Resolve the animation and report its conclusion
+			deferred.resolveWith( elem, [ animation ] );
+			return false;
+		},
+		animation = deferred.promise( {
+			elem: elem,
+			props: jQuery.extend( {}, properties ),
+			opts: jQuery.extend( true, {
+				specialEasing: {},
+				easing: jQuery.easing._default
+			}, options ),
+			originalProperties: properties,
+			originalOptions: options,
+			startTime: fxNow || createFxNow(),
+			duration: options.duration,
+			tweens: [],
+			createTween: function( prop, end ) {
+				var tween = jQuery.Tween( elem, animation.opts, prop, end,
+						animation.opts.specialEasing[ prop ] || animation.opts.easing );
+				animation.tweens.push( tween );
+				return tween;
+			},
+			stop: function( gotoEnd ) {
+				var index = 0,
+
+					// If we are going to the end, we want to run all the tweens
+					// otherwise we skip this part
+					length = gotoEnd ? animation.tweens.length : 0;
+				if ( stopped ) {
+					return this;
+				}
+				stopped = true;
+				for ( ; index < length; index++ ) {
+					animation.tweens[ index ].run( 1 );
+				}
+
+				// Resolve when we played the last frame; otherwise, reject
+				if ( gotoEnd ) {
+					deferred.notifyWith( elem, [ animation, 1, 0 ] );
+					deferred.resolveWith( elem, [ animation, gotoEnd ] );
+				} else {
+					deferred.rejectWith( elem, [ animation, gotoEnd ] );
+				}
+				return this;
+			}
+		} ),
+		props = animation.props;
+
+	propFilter( props, animation.opts.specialEasing );
+
+	for ( ; index < length; index++ ) {
+		result = Animation.prefilters[ index ].call( animation, elem, props, animation.opts );
+		if ( result ) {
+			if ( isFunction( result.stop ) ) {
+				jQuery._queueHooks( animation.elem, animation.opts.queue ).stop =
+					result.stop.bind( result );
+			}
+			return result;
+		}
+	}
+
+	jQuery.map( props, createTween, animation );
+
+	if ( isFunction( animation.opts.start ) ) {
+		animation.opts.start.call( elem, animation );
+	}
+
+	// Attach callbacks from options
+	animation
+		.progress( animation.opts.progress )
+		.done( animation.opts.done, animation.opts.complete )
+		.fail( animation.opts.fail )
+		.always( animation.opts.always );
+
+	jQuery.fx.timer(
+		jQuery.extend( tick, {
+			elem: elem,
+			anim: animation,
+			queue: animation.opts.queue
+		} )
+	);
+
+	return animation;
+}
+
+jQuery.Animation = jQuery.extend( Animation, {
+
+	tweeners: {
+		"*": [ function( prop, value ) {
+			var tween = this.createTween( prop, value );
+			adjustCSS( tween.elem, prop, rcssNum.exec( value ), tween );
+			return tween;
+		} ]
+	},
+
+	tweener: function( props, callback ) {
+		if ( isFunction( props ) ) {
+			callback = props;
+			props = [ "*" ];
+		} else {
+			props = props.match( rnothtmlwhite );
+		}
+
+		var prop,
+			index = 0,
+			length = props.length;
+
+		for ( ; index < length; index++ ) {
+			prop = props[ index ];
+			Animation.tweeners[ prop ] = Animation.tweeners[ prop ] || [];
+			Animation.tweeners[ prop ].unshift( callback );
+		}
+	},
+
+	prefilters: [ defaultPrefilter ],
+
+	prefilter: function( callback, prepend ) {
+		if ( prepend ) {
+			Animation.prefilters.unshift( callback );
+		} else {
+			Animation.prefilters.push( callback );
+		}
+	}
+} );
+
+jQuery.speed = function( speed, easing, fn ) {
+	var opt = speed && typeof speed === "object" ? jQuery.extend( {}, speed ) : {
+		complete: fn || !fn && easing ||
+			isFunction( speed ) && speed,
+		duration: speed,
+		easing: fn && easing || easing && !isFunction( easing ) && easing
+	};
+
+	// Go to the end state if fx are off
+	if ( jQuery.fx.off ) {
+		opt.duration = 0;
+
+	} else {
+		if ( typeof opt.duration !== "number" ) {
+			if ( opt.duration in jQuery.fx.speeds ) {
+				opt.duration = jQuery.fx.speeds[ opt.duration ];
+
+			} else {
+				opt.duration = jQuery.fx.speeds._default;
+			}
+		}
+	}
+
+	// Normalize opt.queue - true/undefined/null -> "fx"
+	if ( opt.queue == null || opt.queue === true ) {
+		opt.queue = "fx";
+	}
+
+	// Queueing
+	opt.old = opt.complete;
+
+	opt.complete = function() {
+		if ( isFunction( opt.old ) ) {
+			opt.old.call( this );
+		}
+
+		if ( opt.queue ) {
+			jQuery.dequeue( this, opt.queue );
+		}
+	};
+
+	return opt;
+};
+
+jQuery.fn.extend( {
+	fadeTo: function( speed, to, easing, callback ) {
+
+		// Show any hidden elements after setting opacity to 0
+		return this.filter( isHiddenWithinTree ).css( "opacity", 0 ).show()
+
+			// Animate to the value specified
+			.end().animate( { opacity: to }, speed, easing, callback );
+	},
+	animate: function( prop, speed, easing, callback ) {
+		var empty = jQuery.isEmptyObject( prop ),
+			optall = jQuery.speed( speed, easing, callback ),
+			doAnimation = function() {
+
+				// Operate on a copy of prop so per-property easing won't be lost
+				var anim = Animation( this, jQuery.extend( {}, prop ), optall );
+
+				// Empty animations, or finishing resolves immediately
+				if ( empty || dataPriv.get( this, "finish" ) ) {
+					anim.stop( true );
+				}
+			};
+			doAnimation.finish = doAnimation;
+
+		return empty || optall.queue === false ?
+			this.each( doAnimation ) :
+			this.queue( optall.queue, doAnimation );
+	},
+	stop: function( type, clearQueue, gotoEnd ) {
+		var stopQueue = function( hooks ) {
+			var stop = hooks.stop;
+			delete hooks.stop;
+			stop( gotoEnd );
+		};
+
+		if ( typeof type !== "string" ) {
+			gotoEnd = clearQueue;
+			clearQueue = type;
+			type = undefined;
+		}
+		if ( clearQueue && type !== false ) {
+			this.queue( type || "fx", [] );
+		}
+
+		return this.each( function() {
+			var dequeue = true,
+				index = type != null && type + "queueHooks",
+				timers = jQuery.timers,
+				data = dataPriv.get( this );
+
+			if ( index ) {
+				if ( data[ index ] && data[ index ].stop ) {
+					stopQueue( data[ index ] );
+				}
+			} else {
+				for ( index in data ) {
+					if ( data[ index ] && data[ index ].stop && rrun.test( index ) ) {
+						stopQueue( data[ index ] );
+					}
+				}
+			}
+
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this &&
+					( type == null || timers[ index ].queue === type ) ) {
+
+					timers[ index ].anim.stop( gotoEnd );
+					dequeue = false;
+					timers.splice( index, 1 );
+				}
+			}
+
+			// Start the next in the queue if the last step wasn't forced.
+			// Timers currently will call their complete callbacks, which
+			// will dequeue but only if they were gotoEnd.
+			if ( dequeue || !gotoEnd ) {
+				jQuery.dequeue( this, type );
+			}
+		} );
+	},
+	finish: function( type ) {
+		if ( type !== false ) {
+			type = type || "fx";
+		}
+		return this.each( function() {
+			var index,
+				data = dataPriv.get( this ),
+				queue = data[ type + "queue" ],
+				hooks = data[ type + "queueHooks" ],
+				timers = jQuery.timers,
+				length = queue ? queue.length : 0;
+
+			// Enable finishing flag on private data
+			data.finish = true;
+
+			// Empty the queue first
+			jQuery.queue( this, type, [] );
+
+			if ( hooks && hooks.stop ) {
+				hooks.stop.call( this, true );
+			}
+
+			// Look for any active animations, and finish them
+			for ( index = timers.length; index--; ) {
+				if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
+					timers[ index ].anim.stop( true );
+					timers.splice( index, 1 );
+				}
+			}
+
+			// Look for any animations in the old queue and finish them
+			for ( index = 0; index < length; index++ ) {
+				if ( queue[ index ] && queue[ index ].finish ) {
+					queue[ index ].finish.call( this );
+				}
+			}
+
+			// Turn off finishing flag
+			delete data.finish;
+		} );
+	}
+} );
+
+jQuery.each( [ "toggle", "show", "hide" ], function( i, name ) {
+	var cssFn = jQuery.fn[ name ];
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return speed == null || typeof speed === "boolean" ?
+			cssFn.apply( this, arguments ) :
+			this.animate( genFx( name, true ), speed, easing, callback );
+	};
+} );
+
+// Generate shortcuts for custom animations
+jQuery.each( {
+	slideDown: genFx( "show" ),
+	slideUp: genFx( "hide" ),
+	slideToggle: genFx( "toggle" ),
+	fadeIn: { opacity: "show" },
+	fadeOut: { opacity: "hide" },
+	fadeToggle: { opacity: "toggle" }
+}, function( name, props ) {
+	jQuery.fn[ name ] = function( speed, easing, callback ) {
+		return this.animate( props, speed, easing, callback );
+	};
+} );
+
+jQuery.timers = [];
+jQuery.fx.tick = function() {
+	var timer,
+		i = 0,
+		timers = jQuery.timers;
+
+	fxNow = Date.now();
+
+	for ( ; i < timers.length; i++ ) {
+		timer = timers[ i ];
+
+		// Run the timer and safely remove it when done (allowing for external removal)
+		if ( !timer() && timers[ i ] === timer ) {
+			timers.splice( i--, 1 );
+		}
+	}
+
+	if ( !timers.length ) {
+		jQuery.fx.stop();
+	}
+	fxNow = undefined;
+};
+
+jQuery.fx.timer = function( timer ) {
+	jQuery.timers.push( timer );
+	jQuery.fx.start();
+};
+
+jQuery.fx.interval = 13;
+jQuery.fx.start = function() {
+	if ( inProgress ) {
+		return;
+	}
+
+	inProgress = true;
+	schedule();
+};
+
+jQuery.fx.stop = function() {
+	inProgress = null;
+};
+
+jQuery.fx.speeds = {
+	slow: 600,
+	fast: 200,
+
+	// Default speed
+	_default: 400
+};
+
+
+// Based off of the plugin by Clint Helfers, with permission.
+// https://web.archive.org/web/20100324014747/http://blindsignals.com/index.php/2009/07/jquery-delay/
+jQuery.fn.delay = function( time, type ) {
+	time = jQuery.fx ? jQuery.fx.speeds[ time ] || time : time;
+	type = type || "fx";
+
+	return this.queue( type, function( next, hooks ) {
+		var timeout = window.setTimeout( next, time );
+		hooks.stop = function() {
+			window.clearTimeout( timeout );
+		};
+	} );
+};
+
+
+( function() {
+	var input = document.createElement( "input" ),
+		select = document.createElement( "select" ),
+		opt = select.appendChild( document.createElement( "option" ) );
+
+	input.type = "checkbox";
+
+	// Support: Android <=4.3 only
+	// Default value for a checkbox should be "on"
+	support.checkOn = input.value !== "";
+
+	// Support: IE <=11 only
+	// Must access selectedIndex to make default options select
+	support.optSelected = opt.selected;
+
+	// Support: IE <=11 only
+	// An input loses its value after becoming a radio
+	input = document.createElement( "input" );
+	input.value = "t";
+	input.type = "radio";
+	support.radioValue = input.value === "t";
+} )();
+
+
+var boolHook,
+	attrHandle = jQuery.expr.attrHandle;
+
+jQuery.fn.extend( {
+	attr: function( name, value ) {
+		return access( this, jQuery.attr, name, value, arguments.length > 1 );
+	},
+
+	removeAttr: function( name ) {
+		return this.each( function() {
+			jQuery.removeAttr( this, name );
+		} );
+	}
+} );
+
+jQuery.extend( {
+	attr: function( elem, name, value ) {
+		var ret, hooks,
+			nType = elem.nodeType;
+
+		// Don't get/set attributes on text, comment and attribute nodes
+		if ( nType === 3 || nType === 8 || nType === 2 ) {
+			return;
+		}
+
+		// Fallback to prop when attributes are not supported
+		if ( typeof elem.getAttribute === "undefined" ) {
+			return jQuery.prop( elem, name, value );
+		}
+
+		// Attribute hooks are determined by the lowercase version
+		// Grab necessary hook if one is defined
+		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
+			hooks = jQuery.attrHooks[ name.toLowerCase() ] ||
+				( jQuery.expr.match.bool.test( name ) ? boolHook : undefined );
+		}
+
+		if ( value !== undefined ) {
+			if ( value === null ) {
+				jQuery.removeAttr( elem, name );
+				return;
+			}
+
+			if ( hooks && "set" in hooks &&
+				( ret = hooks.set( elem, value, name ) ) !== undefined ) {
+				return ret;
+			}
+
+			elem.setAttribute( name, value + "" );
+			return value;
+		}
+
+		if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
+			return ret;
+		}
+
+		ret = jQuery.find.attr( elem, name );
+
+		// Non-existent attributes return null, we normalize to undefined
+		return ret == null ? undefined : ret;
+	},
+
+	attrHooks: {
+		type: {
+			set: function( elem, value ) {
+				if ( !support.radioValue && value === "radio" &&
+					nodeName( elem, "input" ) ) {
+					var val = elem.value;
+					elem.setAttribute( "type", value );
+					if ( val ) {
+						elem.value = val;
+					}
+					return value;
+				}
+			}
+		}
+	},
+
+	removeAttr: function( elem, value ) {
+		var name,
+			i = 0,
+
+			// Attribute names can contain non-HTML whitespace characters
+			// https://html.spec.whatwg.org/multipage/syntax.html#attributes-2
+			attrNames = value && value.match( rnothtmlwhite );
+
+		if ( attrNames && elem.nodeType === 1 ) {
+			while ( ( name = attrNames[ i++ ] ) ) {
+				elem.removeAttribute( name );
+			}
+		}
+	}
+} );
+
+// Hooks for boolean attributes
+boolHook = {
+	set: function( elem, value, name ) {
+		if ( value === false ) {
+
+			// Remove boolean attributes when set to false
+			jQuery.removeAttr( elem, name );
+		} else {
+			elem.setAttribute( name, name );
+		}
+		return name;
+	}
+};
+
+jQuery.each( jQuery.expr.match.bool.source.match( /\w+/g ), function( i, name ) {
+	var getter = attrHandle[ name ] || jQuery.find.attr;
+
+	attrHandle[ name ] = function( elem, name, isXML ) {
+		var ret, handle,
+			lowercaseName = name.toLowerCase();
+
+		if ( !isXML ) {
+
+			// Avoid an infinite loop by temporarily removing this function from the getter
+			handle = attrHandle[ lowercaseName ];
+			attrHandle[ lowercaseName ] = ret;
+			ret = getter( elem, name, isXML ) != null ?
+				lowercaseName :
+				null;
+			attrHandle[ lowercaseName ] = handle;
+		}
+		return ret;
+	};
+} );
+
+
+
+
+var rfocusable = /^(?:input|select|textarea|button)$/i,
+	rclickable = /^(?:a|area)$/i;
+
+jQuery.fn.extend( {
+	prop: function( name, value ) {
+		return access( this, jQuery.prop, name, value, arguments.length > 1 );
+	},
+
+	removeProp: function( name ) {
+		return this.each( function() {
+			delete this[ jQuery.propFix[ name ] || name ];
+		} );
+	}
+} );
+
+jQuery.extend( {
+	prop: function( elem, name, value ) {
+		var ret, hooks,
+			nType = elem.nodeType;
+
+		// Don't get/set properties on text, comment and attribute nodes
+		if ( nType === 3 || nType === 8 || nType === 2 ) {
+			return;
+		}
+
+		if ( nType !== 1 || !jQuery.isXMLDoc( elem ) ) {
+
+			// Fix name and attach hooks
+			name = jQuery.propFix[ name ] || name;
+			hooks = jQuery.propHooks[ name ];
+		}
+
+		if ( value !== undefined ) {
+			if ( hooks && "set" in hooks &&
+				( ret = hooks.set( elem, value, name ) ) !== undefined ) {
+				return ret;
+			}
+
+			return ( elem[ name ] = value );
+		}
+
+		if ( hooks && "get" in hooks && ( ret = hooks.get( elem, name ) ) !== null ) {
+			return ret;
+		}
+
+		return elem[ name ];
+	},
+
+	propHooks: {
+		tabIndex: {
+			get: function( elem ) {
+
+				// Support: IE <=9 - 11 only
+				// elem.tabIndex doesn't always return the
+				// correct value when it hasn't been explicitly set
+				// https://web.archive.org/web/20141116233347/http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
+				// Use proper attribute retrieval(#12072)
+				var tabindex = jQuery.find.attr( elem, "tabindex" );
+
+				if ( tabindex ) {
+					return parseInt( tabindex, 10 );
+				}
+
+				if (
+					rfocusable.test( elem.nodeName ) ||
+					rclickable.test( elem.nodeName ) &&
+					elem.href
+				) {
+					return 0;
+				}
+
+				return -1;
+			}
+		}
+	},
+
+	propFix: {
+		"for": "htmlFor",
+		"class": "className"
+	}
+} );
+
+// Support: IE <=11 only
+// Accessing the selectedIndex property
+// forces the browser to respect setting selected
+// on the option
+// The getter ensures a default option is selected
+// when in an optgroup
+// eslint rule "no-unused-expressions" is disabled for this code
+// since it considers such accessions noop
+if ( !support.optSelected ) {
+	jQuery.propHooks.selected = {
+		get: function( elem ) {
+
+			/* eslint no-unused-expressions: "off" */
+
+			var parent = elem.parentNode;
+			if ( parent && parent.parentNode ) {
+				parent.parentNode.selectedIndex;
+			}
+			return null;
+		},
+		set: function( elem ) {
+
+			/* eslint no-unused-expressions: "off" */
+
+			var parent = elem.parentNode;
+			if ( parent ) {
+				parent.selectedIndex;
+
+				if ( parent.parentNode ) {
+					parent.parentNode.selectedIndex;
+				}
+			}
+		}
+	};
+}
+
+jQuery.each( [
+	"tabIndex",
+	"readOnly",
+	"maxLength",
+	"cellSpacing",
+	"cellPadding",
+	"rowSpan",
+	"colSpan",
+	"useMap",
+	"frameBorder",
+	"contentEditable"
+], function() {
+	jQuery.propFix[ this.toLowerCase() ] = this;
+} );
+
+
+
+
+	// Strip and collapse whitespace according to HTML spec
+	// https://infra.spec.whatwg.org/#strip-and-collapse-ascii-whitespace
+	function stripAndCollapse( value ) {
+		var tokens = value.match( rnothtmlwhite ) || [];
+		return tokens.join( " " );
+	}
+
+
+function getClass( elem ) {
+	return elem.getAttribute && elem.getAttribute( "class" ) || "";
+}
+
+function classesToArray( value ) {
+	if ( Array.isArray( value ) ) {
+		return value;
+	}
+	if ( typeof value === "string" ) {
+		return value.match( rnothtmlwhite ) || [];
+	}
+	return [];
+}
+
+jQuery.fn.extend( {
+	addClass: function( value ) {
+		var classes, elem, cur, curValue, clazz, j, finalValue,
+			i = 0;
+
+		if ( isFunction( value ) ) {
+			return this.each( function( j ) {
+				jQuery( this ).addClass( value.call( this, j, getClass( this ) ) );
+			} );
+		}
+
+		classes = classesToArray( value );
+
+		if ( classes.length ) {
+			while ( ( elem = this[ i++ ] ) ) {
+				curValue = getClass( elem );
+				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );
+
+				if ( cur ) {
+					j = 0;
+					while ( ( clazz = classes[ j++ ] ) ) {
+						if ( cur.indexOf( " " + clazz + " " ) < 0 ) {
+							cur += clazz + " ";
+						}
+					}
+
+					// Only assign if different to avoid unneeded rendering.
+					finalValue = stripAndCollapse( cur );
+					if ( curValue !== finalValue ) {
+						elem.setAttribute( "class", finalValue );
+					}
+				}
+			}
+		}
+
+		return this;
+	},
+
+	removeClass: function( value ) {
+		var classes, elem, cur, curValue, clazz, j, finalValue,
+			i = 0;
+
+		if ( isFunction( value ) ) {
+			return this.each( function( j ) {
+				jQuery( this ).removeClass( value.call( this, j, getClass( this ) ) );
+			} );
+		}
+
+		if ( !arguments.length ) {
+			return this.attr( "class", "" );
+		}
+
+		classes = classesToArray( value );
+
+		if ( classes.length ) {
+			while ( ( elem = this[ i++ ] ) ) {
+				curValue = getClass( elem );
+
+				// This expression is here for better compressibility (see addClass)
+				cur = elem.nodeType === 1 && ( " " + stripAndCollapse( curValue ) + " " );
+
+				if ( cur ) {
+					j = 0;
+					while ( ( clazz = classes[ j++ ] ) ) {
+
+						// Remove *all* instances
+						while ( cur.indexOf( " " + clazz + " " ) > -1 ) {
+							cur = cur.replace( " " + clazz + " ", " " );
+						}
+					}
+
+					// Only assign if different to avoid unneeded rendering.
+					finalValue = stripAndCollapse( cur );
+					if ( curValue !== finalValue ) {
+						elem.setAttribute( "class", finalValue );
+					}
+				}
+			}
+		}
+
+		return this;
+	},
+
+	toggleClass: function( value, stateVal ) {
+		var type = typeof value,
+			isValidValue = type === "string" || Array.isArray( value );
+
+		if ( typeof stateVal === "boolean" && isValidValue ) {
+			return stateVal ? this.addClass( value ) : this.removeClass( value );
+		}
+
+		if ( isFunction( value ) ) {
+			return this.each( function( i ) {
+				jQuery( this ).toggleClass(
+					value.call( this, i, getClass( this ), stateVal ),
+					stateVal
+				);
+			} );
+		}
+
+		return this.each( function() {
+			var className, i, self, classNames;
+
+			if ( isValidValue ) {
+
+				// Toggle individual class names
+				i = 0;
+				self = jQuery( this );
+				classNames = classesToArray( value );
+
+				while ( ( className = classNames[ i++ ] ) ) {
+
+					// Check each className given, space separated list
+					if ( self.hasClass( className ) ) {
+						self.removeClass( className );
+					} else {
+						self.addClass( className );
+					}
+				}
+
+			// Toggle whole class name
+			} else if ( value === undefined || type === "boolean" ) {
+				className = getClass( this );
+				if ( className ) {
+
+					// Store className if set
+					dataPriv.set( this, "__className__", className );
+				}
+
+				// If the element has a class name or if we're passed `false`,
+				// then remove the whole classname (if there was one, the above saved it).
+				// Otherwise bring back whatever was previously saved (if anything),
+				// falling back to the empty string if nothing was stored.
+				if ( this.setAttribute ) {
+					this.setAttribute( "class",
+						className || value === false ?
+						"" :
+						dataPriv.get( this, "__className__" ) || ""
+					);
+				}
+			}
+		} );
+	},
+
+	hasClass: function( selector ) {
+		var className, elem,
+			i = 0;
+
+		className = " " + selector + " ";
+		while ( ( elem = this[ i++ ] ) ) {
+			if ( elem.nodeType === 1 &&
+				( " " + stripAndCollapse( getClass( elem ) ) + " " ).indexOf( className ) > -1 ) {
+					return true;
+			}
+		}
+
+		return false;
+	}
+} );
+
+
+
+
+var rreturn = /\r/g;
+
+jQuery.fn.extend( {
+	val: function( value ) {
+		var hooks, ret, valueIsFunction,
+			elem = this[ 0 ];
+
+		if ( !arguments.length ) {
+			if ( elem ) {
+				hooks = jQuery.valHooks[ elem.type ] ||
+					jQuery.valHooks[ elem.nodeName.toLowerCase() ];
+
+				if ( hooks &&
+					"get" in hooks &&
+					( ret = hooks.get( elem, "value" ) ) !== undefined
+				) {
+					return ret;
+				}
+
+				ret = elem.value;
+
+				// Handle most common string cases
+				if ( typeof ret === "string" ) {
+					return ret.replace( rreturn, "" );
+				}
+
+				// Handle cases where value is null/undef or number
+				return ret == null ? "" : ret;
+			}
+
+			return;
+		}
+
+		valueIsFunction = isFunction( value );
+
+		return this.each( function( i ) {
+			var val;
+
+			if ( this.nodeType !== 1 ) {
+				return;
+			}
+
+			if ( valueIsFunction ) {
+				val = value.call( this, i, jQuery( this ).val() );
+			} else {
+				val = value;
+			}
+
+			// Treat null/undefined as ""; convert numbers to string
+			if ( val == null ) {
+				val = "";
+
+			} else if ( typeof val === "number" ) {
+				val += "";
+
+			} else if ( Array.isArray( val ) ) {
+				val = jQuery.map( val, function( value ) {
+					return value == null ? "" : value + "";
+				} );
+			}
+
+			hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];
+
+			// If set returns undefined, fall back to normal setting
+			if ( !hooks || !( "set" in hooks ) || hooks.set( this, val, "value" ) === undefined ) {
+				this.value = val;
+			}
+		} );
+	}
+} );
+
+jQuery.extend( {
+	valHooks: {
+		option: {
+			get: function( elem ) {
+
+				var val = jQuery.find.attr( elem, "value" );
+				return val != null ?
+					val :
+
+					// Support: IE <=10 - 11 only
+					// option.text throws exceptions (#14686, #14858)
+					// Strip and collapse whitespace
+					// https://html.spec.whatwg.org/#strip-and-collapse-whitespace
+					stripAndCollapse( jQuery.text( elem ) );
+			}
+		},
+		select: {
+			get: function( elem ) {
+				var value, option, i,
+					options = elem.options,
+					index = elem.selectedIndex,
+					one = elem.type === "select-one",
+					values = one ? null : [],
+					max = one ? index + 1 : options.length;
+
+				if ( index < 0 ) {
+					i = max;
+
+				} else {
+					i = one ? index : 0;
+				}
+
+				// Loop through all the selected options
+				for ( ; i < max; i++ ) {
+					option = options[ i ];
+
+					// Support: IE <=9 only
+					// IE8-9 doesn't update selected after form reset (#2551)
+					if ( ( option.selected || i === index ) &&
+
+							// Don't return options that are disabled or in a disabled optgroup
+							!option.disabled &&
+							( !option.parentNode.disabled ||
+								!nodeName( option.parentNode, "optgroup" ) ) ) {
+
+						// Get the specific value for the option
+						value = jQuery( option ).val();
+
+						// We don't need an array for one selects
+						if ( one ) {
+							return value;
+						}
+
+						// Multi-Selects return an array
+						values.push( value );
+					}
+				}
+
+				return values;
+			},
+
+			set: function( elem, value ) {
+				var optionSet, option,
+					options = elem.options,
+					values = jQuery.makeArray( value ),
+					i = options.length;
+
+				while ( i-- ) {
+					option = options[ i ];
+
+					/* eslint-disable no-cond-assign */
+
+					if ( option.selected =
+						jQuery.inArray( jQuery.valHooks.option.get( option ), values ) > -1
+					) {
+						optionSet = true;
+					}
+
+					/* eslint-enable no-cond-assign */
+				}
+
+				// Force browsers to behave consistently when non-matching value is set
+				if ( !optionSet ) {
+					elem.selectedIndex = -1;
+				}
+				return values;
+			}
+		}
+	}
+} );
+
+// Radios and checkboxes getter/setter
+jQuery.each( [ "radio", "checkbox" ], function() {
+	jQuery.valHooks[ this ] = {
+		set: function( elem, value ) {
+			if ( Array.isArray( value ) ) {
+				return ( elem.checked = jQuery.inArray( jQuery( elem ).val(), value ) > -1 );
+			}
+		}
+	};
+	if ( !support.checkOn ) {
+		jQuery.valHooks[ this ].get = function( elem ) {
+			return elem.getAttribute( "value" ) === null ? "on" : elem.value;
+		};
+	}
+} );
+
+
+
+
+// Return jQuery for attributes-only inclusion
+
+
+support.focusin = "onfocusin" in window;
+
+
+var rfocusMorph = /^(?:focusinfocus|focusoutblur)$/,
+	stopPropagationCallback = function( e ) {
+		e.stopPropagation();
+	};
+
+jQuery.extend( jQuery.event, {
+
+	trigger: function( event, data, elem, onlyHandlers ) {
+
+		var i, cur, tmp, bubbleType, ontype, handle, special, lastElement,
+			eventPath = [ elem || document ],
+			type = hasOwn.call( event, "type" ) ? event.type : event,
+			namespaces = hasOwn.call( event, "namespace" ) ? event.namespace.split( "." ) : [];
+
+		cur = lastElement = tmp = elem = elem || document;
+
+		// Don't do events on text and comment nodes
+		if ( elem.nodeType === 3 || elem.nodeType === 8 ) {
+			return;
+		}
+
+		// focus/blur morphs to focusin/out; ensure we're not firing them right now
+		if ( rfocusMorph.test( type + jQuery.event.triggered ) ) {
+			return;
+		}
+
+		if ( type.indexOf( "." ) > -1 ) {
+
+			// Namespaced trigger; create a regexp to match event type in handle()
+			namespaces = type.split( "." );
+			type = namespaces.shift();
+			namespaces.sort();
+		}
+		ontype = type.indexOf( ":" ) < 0 && "on" + type;
+
+		// Caller can pass in a jQuery.Event object, Object, or just an event type string
+		event = event[ jQuery.expando ] ?
+			event :
+			new jQuery.Event( type, typeof event === "object" && event );
+
+		// Trigger bitmask: & 1 for native handlers; & 2 for jQuery (always true)
+		event.isTrigger = onlyHandlers ? 2 : 3;
+		event.namespace = namespaces.join( "." );
+		event.rnamespace = event.namespace ?
+			new RegExp( "(^|\\.)" + namespaces.join( "\\.(?:.*\\.|)" ) + "(\\.|$)" ) :
+			null;
+
+		// Clean up the event in case it is being reused
+		event.result = undefined;
+		if ( !event.target ) {
+			event.target = elem;
+		}
+
+		// Clone any incoming data and prepend the event, creating the handler arg list
+		data = data == null ?
+			[ event ] :
+			jQuery.makeArray( data, [ event ] );
+
+		// Allow special events to draw outside the lines
+		special = jQuery.event.special[ type ] || {};
+		if ( !onlyHandlers && special.trigger && special.trigger.apply( elem, data ) === false ) {
+			return;
+		}
+
+		// Determine event propagation path in advance, per W3C events spec (#9951)
+		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
+		if ( !onlyHandlers && !special.noBubble && !isWindow( elem ) ) {
+
+			bubbleType = special.delegateType || type;
+			if ( !rfocusMorph.test( bubbleType + type ) ) {
+				cur = cur.parentNode;
+			}
+			for ( ; cur; cur = cur.parentNode ) {
+				eventPath.push( cur );
+				tmp = cur;
+			}
+
+			// Only add window if we got to document (e.g., not plain obj or detached DOM)
+			if ( tmp === ( elem.ownerDocument || document ) ) {
+				eventPath.push( tmp.defaultView || tmp.parentWindow || window );
+			}
+		}
+
+		// Fire handlers on the event path
+		i = 0;
+		while ( ( cur = eventPath[ i++ ] ) && !event.isPropagationStopped() ) {
+			lastElement = cur;
+			event.type = i > 1 ?
+				bubbleType :
+				special.bindType || type;
+
+			// jQuery handler
+			handle = ( dataPriv.get( cur, "events" ) || {} )[ event.type ] &&
+				dataPriv.get( cur, "handle" );
+			if ( handle ) {
+				handle.apply( cur, data );
+			}
+
+			// Native handler
+			handle = ontype && cur[ ontype ];
+			if ( handle && handle.apply && acceptData( cur ) ) {
+				event.result = handle.apply( cur, data );
+				if ( event.result === false ) {
+					event.preventDefault();
+				}
+			}
+		}
+		event.type = type;
+
+		// If nobody prevented the default action, do it now
+		if ( !onlyHandlers && !event.isDefaultPrevented() ) {
+
+			if ( ( !special._default ||
+				special._default.apply( eventPath.pop(), data ) === false ) &&
+				acceptData( elem ) ) {
+
+				// Call a native DOM method on the target with the same name as the event.
+				// Don't do default actions on window, that's where global variables be (#6170)
+				if ( ontype && isFunction( elem[ type ] ) && !isWindow( elem ) ) {
+
+					// Don't re-trigger an onFOO event when we call its FOO() method
+					tmp = elem[ ontype ];
+
+					if ( tmp ) {
+						elem[ ontype ] = null;
+					}
+
+					// Prevent re-triggering of the same event, since we already bubbled it above
+					jQuery.event.triggered = type;
+
+					if ( event.isPropagationStopped() ) {
+						lastElement.addEventListener( type, stopPropagationCallback );
+					}
+
+					elem[ type ]();
+
+					if ( event.isPropagationStopped() ) {
+						lastElement.removeEventListener( type, stopPropagationCallback );
+					}
+
+					jQuery.event.triggered = undefined;
+
+					if ( tmp ) {
+						elem[ ontype ] = tmp;
+					}
+				}
+			}
+		}
+
+		return event.result;
+	},
+
+	// Piggyback on a donor event to simulate a different one
+	// Used only for `focus(in | out)` events
+	simulate: function( type, elem, event ) {
+		var e = jQuery.extend(
+			new jQuery.Event(),
+			event,
+			{
+				type: type,
+				isSimulated: true
+			}
+		);
+
+		jQuery.event.trigger( e, null, elem );
+	}
+
+} );
+
+jQuery.fn.extend( {
+
+	trigger: function( type, data ) {
+		return this.each( function() {
+			jQuery.event.trigger( type, data, this );
+		} );
+	},
+	triggerHandler: function( type, data ) {
+		var elem = this[ 0 ];
+		if ( elem ) {
+			return jQuery.event.trigger( type, data, elem, true );
+		}
+	}
+} );
+
+
+// Support: Firefox <=44
+// Firefox doesn't have focus(in | out) events
+// Related ticket - https://bugzilla.mozilla.org/show_bug.cgi?id=687787
+//
+// Support: Chrome <=48 - 49, Safari <=9.0 - 9.1
+// focus(in | out) events fire after focus & blur events,
+// which is spec violation - http://www.w3.org/TR/DOM-Level-3-Events/#events-focusevent-event-order
+// Related ticket - https://bugs.chromium.org/p/chromium/issues/detail?id=449857
+if ( !support.focusin ) {
+	jQuery.each( { focus: "focusin", blur: "focusout" }, function( orig, fix ) {
+
+		// Attach a single capturing handler on the document while someone wants focusin/focusout
+		var handler = function( event ) {
+			jQuery.event.simulate( fix, event.target, jQuery.event.fix( event ) );
+		};
+
+		jQuery.event.special[ fix ] = {
+			setup: function() {
+				var doc = this.ownerDocument || this,
+					attaches = dataPriv.access( doc, fix );
+
+				if ( !attaches ) {
+					doc.addEventListener( orig, handler, true );
+				}
+				dataPriv.access( doc, fix, ( attaches || 0 ) + 1 );
+			},
+			teardown: function() {
+				var doc = this.ownerDocument || this,
+					attaches = dataPriv.access( doc, fix ) - 1;
+
+				if ( !attaches ) {
+					doc.removeEventListener( orig, handler, true );
+					dataPriv.remove( doc, fix );
+
+				} else {
+					dataPriv.access( doc, fix, attaches );
+				}
+			}
+		};
+	} );
+}
+var location = window.location;
+
+var nonce = Date.now();
+
+var rquery = ( /\?/ );
+
+
+
+// Cross-browser xml parsing
+jQuery.parseXML = function( data ) {
+	var xml;
+	if ( !data || typeof data !== "string" ) {
+		return null;
+	}
+
+	// Support: IE 9 - 11 only
+	// IE throws on parseFromString with invalid input.
+	try {
+		xml = ( new window.DOMParser() ).parseFromString( data, "text/xml" );
+	} catch ( e ) {
+		xml = undefined;
+	}
+
+	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
+		jQuery.error( "Invalid XML: " + data );
+	}
+	return xml;
+};
+
+
+var
+	rbracket = /\[\]$/,
+	rCRLF = /\r?\n/g,
+	rsubmitterTypes = /^(?:submit|button|image|reset|file)$/i,
+	rsubmittable = /^(?:input|select|textarea|keygen)/i;
+
+function buildParams( prefix, obj, traditional, add ) {
+	var name;
+
+	if ( Array.isArray( obj ) ) {
+
+		// Serialize array item.
+		jQuery.each( obj, function( i, v ) {
+			if ( traditional || rbracket.test( prefix ) ) {
+
+				// Treat each array item as a scalar.
+				add( prefix, v );
+
+			} else {
+
+				// Item is non-scalar (array or object), encode its numeric index.
+				buildParams(
+					prefix + "[" + ( typeof v === "object" && v != null ? i : "" ) + "]",
+					v,
+					traditional,
+					add
+				);
+			}
+		} );
+
+	} else if ( !traditional && toType( obj ) === "object" ) {
+
+		// Serialize object item.
+		for ( name in obj ) {
+			buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
+		}
+
+	} else {
+
+		// Serialize scalar item.
+		add( prefix, obj );
+	}
+}
+
+// Serialize an array of form elements or a set of
+// key/values into a query string
+jQuery.param = function( a, traditional ) {
+	var prefix,
+		s = [],
+		add = function( key, valueOrFunction ) {
+
+			// If value is a function, invoke it and use its return value
+			var value = isFunction( valueOrFunction ) ?
+				valueOrFunction() :
+				valueOrFunction;
+
+			s[ s.length ] = encodeURIComponent( key ) + "=" +
+				encodeURIComponent( value == null ? "" : value );
+		};
+
+	if ( a == null ) {
+		return "";
+	}
+
+	// If an array was passed in, assume that it is an array of form elements.
+	if ( Array.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
+
+		// Serialize the form elements
+		jQuery.each( a, function() {
+			add( this.name, this.value );
+		} );
+
+	} else {
+
+		// If traditional, encode the "old" way (the way 1.3.2 or older
+		// did it), otherwise encode params recursively.
+		for ( prefix in a ) {
+			buildParams( prefix, a[ prefix ], traditional, add );
+		}
+	}
+
+	// Return the resulting serialization
+	return s.join( "&" );
+};
+
+jQuery.fn.extend( {
+	serialize: function() {
+		return jQuery.param( this.serializeArray() );
+	},
+	serializeArray: function() {
+		return this.map( function() {
+
+			// Can add propHook for "elements" to filter or add form elements
+			var elements = jQuery.prop( this, "elements" );
+			return elements ? jQuery.makeArray( elements ) : this;
+		} )
+		.filter( function() {
+			var type = this.type;
+
+			// Use .is( ":disabled" ) so that fieldset[disabled] works
+			return this.name && !jQuery( this ).is( ":disabled" ) &&
+				rsubmittable.test( this.nodeName ) && !rsubmitterTypes.test( type ) &&
+				( this.checked || !rcheckableType.test( type ) );
+		} )
+		.map( function( i, elem ) {
+			var val = jQuery( this ).val();
+
+			if ( val == null ) {
+				return null;
+			}
+
+			if ( Array.isArray( val ) ) {
+				return jQuery.map( val, function( val ) {
+					return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
+				} );
+			}
+
+			return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
+		} ).get();
+	}
+} );
+
+
+var
+	r20 = /%20/g,
+	rhash = /#.*$/,
+	rantiCache = /([?&])_=[^&]*/,
+	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
+
+	// #7653, #8125, #8152: local protocol detection
+	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
+	rnoContent = /^(?:GET|HEAD)$/,
+	rprotocol = /^\/\//,
+
+	/* Prefilters
+	 * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
+	 * 2) These are called:
+	 *    - BEFORE asking for a transport
+	 *    - AFTER param serialization (s.data is a string if s.processData is true)
+	 * 3) key is the dataType
+	 * 4) the catchall symbol "*" can be used
+	 * 5) execution will start with transport dataType and THEN continue down to "*" if needed
+	 */
+	prefilters = {},
+
+	/* Transports bindings
+	 * 1) key is the dataType
+	 * 2) the catchall symbol "*" can be used
+	 * 3) selection will start with transport dataType and THEN go to "*" if needed
+	 */
+	transports = {},
+
+	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
+	allTypes = "*/".concat( "*" ),
+
+	// Anchor tag for parsing the document origin
+	originAnchor = document.createElement( "a" );
+	originAnchor.href = location.href;
+
+// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
+function addToPrefiltersOrTransports( structure ) {
+
+	// dataTypeExpression is optional and defaults to "*"
+	return function( dataTypeExpression, func ) {
+
+		if ( typeof dataTypeExpression !== "string" ) {
+			func = dataTypeExpression;
+			dataTypeExpression = "*";
+		}
+
+		var dataType,
+			i = 0,
+			dataTypes = dataTypeExpression.toLowerCase().match( rnothtmlwhite ) || [];
+
+		if ( isFunction( func ) ) {
+
+			// For each dataType in the dataTypeExpression
+			while ( ( dataType = dataTypes[ i++ ] ) ) {
+
+				// Prepend if requested
+				if ( dataType[ 0 ] === "+" ) {
+					dataType = dataType.slice( 1 ) || "*";
+					( structure[ dataType ] = structure[ dataType ] || [] ).unshift( func );
+
+				// Otherwise append
+				} else {
+					( structure[ dataType ] = structure[ dataType ] || [] ).push( func );
+				}
+			}
+		}
+	};
+}
+
+// Base inspection function for prefilters and transports
+function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {
+
+	var inspected = {},
+		seekingTransport = ( structure === transports );
+
+	function inspect( dataType ) {
+		var selected;
+		inspected[ dataType ] = true;
+		jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
+			var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
+			if ( typeof dataTypeOrTransport === "string" &&
+				!seekingTransport && !inspected[ dataTypeOrTransport ] ) {
+
+				options.dataTypes.unshift( dataTypeOrTransport );
+				inspect( dataTypeOrTransport );
+				return false;
+			} else if ( seekingTransport ) {
+				return !( selected = dataTypeOrTransport );
+			}
+		} );
+		return selected;
+	}
+
+	return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
+}
+
+// A special extend for ajax options
+// that takes "flat" options (not to be deep extended)
+// Fixes #9887
+function ajaxExtend( target, src ) {
+	var key, deep,
+		flatOptions = jQuery.ajaxSettings.flatOptions || {};
+
+	for ( key in src ) {
+		if ( src[ key ] !== undefined ) {
+			( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];
+		}
+	}
+	if ( deep ) {
+		jQuery.extend( true, target, deep );
+	}
+
+	return target;
+}
+
+/* Handles responses to an ajax request:
+ * - finds the right dataType (mediates between content-type and expected dataType)
+ * - returns the corresponding response
+ */
+function ajaxHandleResponses( s, jqXHR, responses ) {
+
+	var ct, type, finalDataType, firstDataType,
+		contents = s.contents,
+		dataTypes = s.dataTypes;
+
+	// Remove auto dataType and get content-type in the process
+	while ( dataTypes[ 0 ] === "*" ) {
+		dataTypes.shift();
+		if ( ct === undefined ) {
+			ct = s.mimeType || jqXHR.getResponseHeader( "Content-Type" );
+		}
+	}
+
+	// Check if we're dealing with a known content-type
+	if ( ct ) {
+		for ( type in contents ) {
+			if ( contents[ type ] && contents[ type ].test( ct ) ) {
+				dataTypes.unshift( type );
+				break;
+			}
+		}
+	}
+
+	// Check to see if we have a response for the expected dataType
+	if ( dataTypes[ 0 ] in responses ) {
+		finalDataType = dataTypes[ 0 ];
+	} else {
+
+		// Try convertible dataTypes
+		for ( type in responses ) {
+			if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[ 0 ] ] ) {
+				finalDataType = type;
+				break;
+			}
+			if ( !firstDataType ) {
+				firstDataType = type;
+			}
+		}
+
+		// Or just use first one
+		finalDataType = finalDataType || firstDataType;
+	}
+
+	// If we found a dataType
+	// We add the dataType to the list if needed
+	// and return the corresponding response
+	if ( finalDataType ) {
+		if ( finalDataType !== dataTypes[ 0 ] ) {
+			dataTypes.unshift( finalDataType );
+		}
+		return responses[ finalDataType ];
+	}
+}
+
+/* Chain conversions given the request and the original response
+ * Also sets the responseXXX fields on the jqXHR instance
+ */
+function ajaxConvert( s, response, jqXHR, isSuccess ) {
+	var conv2, current, conv, tmp, prev,
+		converters = {},
+
+		// Work with a copy of dataTypes in case we need to modify it for conversion
+		dataTypes = s.dataTypes.slice();
+
+	// Create converters map with lowercased keys
+	if ( dataTypes[ 1 ] ) {
+		for ( conv in s.converters ) {
+			converters[ conv.toLowerCase() ] = s.converters[ conv ];
+		}
+	}
+
+	current = dataTypes.shift();
+
+	// Convert to each sequential dataType
+	while ( current ) {
+
+		if ( s.responseFields[ current ] ) {
+			jqXHR[ s.responseFields[ current ] ] = response;
+		}
+
+		// Apply the dataFilter if provided
+		if ( !prev && isSuccess && s.dataFilter ) {
+			response = s.dataFilter( response, s.dataType );
+		}
+
+		prev = current;
+		current = dataTypes.shift();
+
+		if ( current ) {
+
+			// There's only work to do if current dataType is non-auto
+			if ( current === "*" ) {
+
+				current = prev;
+
+			// Convert response if prev dataType is non-auto and differs from current
+			} else if ( prev !== "*" && prev !== current ) {
+
+				// Seek a direct converter
+				conv = converters[ prev + " " + current ] || converters[ "* " + current ];
+
+				// If none found, seek a pair
+				if ( !conv ) {
+					for ( conv2 in converters ) {
+
+						// If conv2 outputs current
+						tmp = conv2.split( " " );
+						if ( tmp[ 1 ] === current ) {
+
+							// If prev can be converted to accepted input
+							conv = converters[ prev + " " + tmp[ 0 ] ] ||
+								converters[ "* " + tmp[ 0 ] ];
+							if ( conv ) {
+
+								// Condense equivalence converters
+								if ( conv === true ) {
+									conv = converters[ conv2 ];
+
+								// Otherwise, insert the intermediate dataType
+								} else if ( converters[ conv2 ] !== true ) {
+									current = tmp[ 0 ];
+									dataTypes.unshift( tmp[ 1 ] );
+								}
+								break;
+							}
+						}
+					}
+				}
+
+				// Apply converter (if not an equivalence)
+				if ( conv !== true ) {
+
+					// Unless errors are allowed to bubble, catch and return them
+					if ( conv && s.throws ) {
+						response = conv( response );
+					} else {
+						try {
+							response = conv( response );
+						} catch ( e ) {
+							return {
+								state: "parsererror",
+								error: conv ? e : "No conversion from " + prev + " to " + current
+							};
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return { state: "success", data: response };
+}
+
+jQuery.extend( {
+
+	// Counter for holding the number of active queries
+	active: 0,
+
+	// Last-Modified header cache for next request
+	lastModified: {},
+	etag: {},
+
+	ajaxSettings: {
+		url: location.href,
+		type: "GET",
+		isLocal: rlocalProtocol.test( location.protocol ),
+		global: true,
+		processData: true,
+		async: true,
+		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
+
+		/*
+		timeout: 0,
+		data: null,
+		dataType: null,
+		username: null,
+		password: null,
+		cache: null,
+		throws: false,
+		traditional: false,
+		headers: {},
+		*/
+
+		accepts: {
+			"*": allTypes,
+			text: "text/plain",
+			html: "text/html",
+			xml: "application/xml, text/xml",
+			json: "application/json, text/javascript"
+		},
+
+		contents: {
+			xml: /\bxml\b/,
+			html: /\bhtml/,
+			json: /\bjson\b/
+		},
+
+		responseFields: {
+			xml: "responseXML",
+			text: "responseText",
+			json: "responseJSON"
+		},
+
+		// Data converters
+		// Keys separate source (or catchall "*") and destination types with a single space
+		converters: {
+
+			// Convert anything to text
+			"* text": String,
+
+			// Text to html (true = no transformation)
+			"text html": true,
+
+			// Evaluate text as a json expression
+			"text json": JSON.parse,
+
+			// Parse text as xml
+			"text xml": jQuery.parseXML
+		},
+
+		// For options that shouldn't be deep extended:
+		// you can add your own custom options here if
+		// and when you create one that shouldn't be
+		// deep extended (see ajaxExtend)
+		flatOptions: {
+			url: true,
+			context: true
+		}
+	},
+
+	// Creates a full fledged settings object into target
+	// with both ajaxSettings and settings fields.
+	// If target is omitted, writes into ajaxSettings.
+	ajaxSetup: function( target, settings ) {
+		return settings ?
+
+			// Building a settings object
+			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
+
+			// Extending ajaxSettings
+			ajaxExtend( jQuery.ajaxSettings, target );
+	},
+
+	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
+	ajaxTransport: addToPrefiltersOrTransports( transports ),
+
+	// Main method
+	ajax: function( url, options ) {
+
+		// If url is an object, simulate pre-1.5 signature
+		if ( typeof url === "object" ) {
+			options = url;
+			url = undefined;
+		}
+
+		// Force options to be an object
+		options = options || {};
+
+		var transport,
+
+			// URL without anti-cache param
+			cacheURL,
+
+			// Response headers
+			responseHeadersString,
+			responseHeaders,
+
+			// timeout handle
+			timeoutTimer,
+
+			// Url cleanup var
+			urlAnchor,
+
+			// Request state (becomes false upon send and true upon completion)
+			completed,
+
+			// To know if global events are to be dispatched
+			fireGlobals,
+
+			// Loop variable
+			i,
+
+			// uncached part of the url
+			uncached,
+
+			// Create the final options object
+			s = jQuery.ajaxSetup( {}, options ),
+
+			// Callbacks context
+			callbackContext = s.context || s,
+
+			// Context for global events is callbackContext if it is a DOM node or jQuery collection
+			globalEventContext = s.context &&
+				( callbackContext.nodeType || callbackContext.jquery ) ?
+					jQuery( callbackContext ) :
+					jQuery.event,
+
+			// Deferreds
+			deferred = jQuery.Deferred(),
+			completeDeferred = jQuery.Callbacks( "once memory" ),
+
+			// Status-dependent callbacks
+			statusCode = s.statusCode || {},
+
+			// Headers (they are sent all at once)
+			requestHeaders = {},
+			requestHeadersNames = {},
+
+			// Default abort message
+			strAbort = "canceled",
+
+			// Fake xhr
+			jqXHR = {
+				readyState: 0,
+
+				// Builds headers hashtable if needed
+				getResponseHeader: function( key ) {
+					var match;
+					if ( completed ) {
+						if ( !responseHeaders ) {
+							responseHeaders = {};
+							while ( ( match = rheaders.exec( responseHeadersString ) ) ) {
+								responseHeaders[ match[ 1 ].toLowerCase() + " " ] =
+									( responseHeaders[ match[ 1 ].toLowerCase() + " " ] || [] )
+										.concat( match[ 2 ] );
+							}
+						}
+						match = responseHeaders[ key.toLowerCase() + " " ];
+					}
+					return match == null ? null : match.join( ", " );
+				},
+
+				// Raw string
+				getAllResponseHeaders: function() {
+					return completed ? responseHeadersString : null;
+				},
+
+				// Caches the header
+				setRequestHeader: function( name, value ) {
+					if ( completed == null ) {
+						name = requestHeadersNames[ name.toLowerCase() ] =
+							requestHeadersNames[ name.toLowerCase() ] || name;
+						requestHeaders[ name ] = value;
+					}
+					return this;
+				},
+
+				// Overrides response content-type header
+				overrideMimeType: function( type ) {
+					if ( completed == null ) {
+						s.mimeType = type;
+					}
+					return this;
+				},
+
+				// Status-dependent callbacks
+				statusCode: function( map ) {
+					var code;
+					if ( map ) {
+						if ( completed ) {
+
+							// Execute the appropriate callbacks
+							jqXHR.always( map[ jqXHR.status ] );
+						} else {
+
+							// Lazy-add the new callbacks in a way that preserves old ones
+							for ( code in map ) {
+								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
+							}
+						}
+					}
+					return this;
+				},
+
+				// Cancel the request
+				abort: function( statusText ) {
+					var finalText = statusText || strAbort;
+					if ( transport ) {
+						transport.abort( finalText );
+					}
+					done( 0, finalText );
+					return this;
+				}
+			};
+
+		// Attach deferreds
+		deferred.promise( jqXHR );
+
+		// Add protocol if not provided (prefilters might expect it)
+		// Handle falsy url in the settings object (#10093: consistency with old signature)
+		// We also use the url parameter if available
+		s.url = ( ( url || s.url || location.href ) + "" )
+			.replace( rprotocol, location.protocol + "//" );
+
+		// Alias method option to type as per ticket #12004
+		s.type = options.method || options.type || s.method || s.type;
+
+		// Extract dataTypes list
+		s.dataTypes = ( s.dataType || "*" ).toLowerCase().match( rnothtmlwhite ) || [ "" ];
+
+		// A cross-domain request is in order when the origin doesn't match the current origin.
+		if ( s.crossDomain == null ) {
+			urlAnchor = document.createElement( "a" );
+
+			// Support: IE <=8 - 11, Edge 12 - 15
+			// IE throws exception on accessing the href property if url is malformed,
+			// e.g. http://example.com:80x/
+			try {
+				urlAnchor.href = s.url;
+
+				// Support: IE <=8 - 11 only
+				// Anchor's host property isn't correctly set when s.url is relative
+				urlAnchor.href = urlAnchor.href;
+				s.crossDomain = originAnchor.protocol + "//" + originAnchor.host !==
+					urlAnchor.protocol + "//" + urlAnchor.host;
+			} catch ( e ) {
+
+				// If there is an error parsing the URL, assume it is crossDomain,
+				// it can be rejected by the transport if it is invalid
+				s.crossDomain = true;
+			}
+		}
+
+		// Convert data if not already a string
+		if ( s.data && s.processData && typeof s.data !== "string" ) {
+			s.data = jQuery.param( s.data, s.traditional );
+		}
+
+		// Apply prefilters
+		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
+
+		// If request was aborted inside a prefilter, stop there
+		if ( completed ) {
+			return jqXHR;
+		}
+
+		// We can fire global events as of now if asked to
+		// Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)
+		fireGlobals = jQuery.event && s.global;
+
+		// Watch for a new set of requests
+		if ( fireGlobals && jQuery.active++ === 0 ) {
+			jQuery.event.trigger( "ajaxStart" );
+		}
+
+		// Uppercase the type
+		s.type = s.type.toUpperCase();
+
+		// Determine if request has content
+		s.hasContent = !rnoContent.test( s.type );
+
+		// Save the URL in case we're toying with the If-Modified-Since
+		// and/or If-None-Match header later on
+		// Remove hash to simplify url manipulation
+		cacheURL = s.url.replace( rhash, "" );
+
+		// More options handling for requests with no content
+		if ( !s.hasContent ) {
+
+			// Remember the hash so we can put it back
+			uncached = s.url.slice( cacheURL.length );
+
+			// If data is available and should be processed, append data to url
+			if ( s.data && ( s.processData || typeof s.data === "string" ) ) {
+				cacheURL += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data;
+
+				// #9682: remove data so that it's not used in an eventual retry
+				delete s.data;
+			}
+
+			// Add or update anti-cache param if needed
+			if ( s.cache === false ) {
+				cacheURL = cacheURL.replace( rantiCache, "$1" );
+				uncached = ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + ( nonce++ ) + uncached;
+			}
+
+			// Put hash and anti-cache on the URL that will be requested (gh-1732)
+			s.url = cacheURL + uncached;
+
+		// Change '%20' to '+' if this is encoded form body content (gh-2658)
+		} else if ( s.data && s.processData &&
+			( s.contentType || "" ).indexOf( "application/x-www-form-urlencoded" ) === 0 ) {
+			s.data = s.data.replace( r20, "+" );
+		}
+
+		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+		if ( s.ifModified ) {
+			if ( jQuery.lastModified[ cacheURL ] ) {
+				jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
+			}
+			if ( jQuery.etag[ cacheURL ] ) {
+				jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
+			}
+		}
+
+		// Set the correct header, if data is being sent
+		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+			jqXHR.setRequestHeader( "Content-Type", s.contentType );
+		}
+
+		// Set the Accepts header for the server, depending on the dataType
+		jqXHR.setRequestHeader(
+			"Accept",
+			s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?
+				s.accepts[ s.dataTypes[ 0 ] ] +
+					( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
+				s.accepts[ "*" ]
+		);
+
+		// Check for headers option
+		for ( i in s.headers ) {
+			jqXHR.setRequestHeader( i, s.headers[ i ] );
+		}
+
+		// Allow custom headers/mimetypes and early abort
+		if ( s.beforeSend &&
+			( s.beforeSend.call( callbackContext, jqXHR, s ) === false || completed ) ) {
+
+			// Abort if not done already and return
+			return jqXHR.abort();
+		}
+
+		// Aborting is no longer a cancellation
+		strAbort = "abort";
+
+		// Install callbacks on deferreds
+		completeDeferred.add( s.complete );
+		jqXHR.done( s.success );
+		jqXHR.fail( s.error );
+
+		// Get transport
+		transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
+
+		// If no transport, we auto-abort
+		if ( !transport ) {
+			done( -1, "No Transport" );
+		} else {
+			jqXHR.readyState = 1;
+
+			// Send global event
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
+			}
+
+			// If request was aborted inside ajaxSend, stop there
+			if ( completed ) {
+				return jqXHR;
+			}
+
+			// Timeout
+			if ( s.async && s.timeout > 0 ) {
+				timeoutTimer = window.setTimeout( function() {
+					jqXHR.abort( "timeout" );
+				}, s.timeout );
+			}
+
+			try {
+				completed = false;
+				transport.send( requestHeaders, done );
+			} catch ( e ) {
+
+				// Rethrow post-completion exceptions
+				if ( completed ) {
+					throw e;
+				}
+
+				// Propagate others as results
+				done( -1, e );
+			}
+		}
+
+		// Callback for when everything is done
+		function done( status, nativeStatusText, responses, headers ) {
+			var isSuccess, success, error, response, modified,
+				statusText = nativeStatusText;
+
+			// Ignore repeat invocations
+			if ( completed ) {
+				return;
+			}
+
+			completed = true;
+
+			// Clear timeout if it exists
+			if ( timeoutTimer ) {
+				window.clearTimeout( timeoutTimer );
+			}
+
+			// Dereference transport for early garbage collection
+			// (no matter how long the jqXHR object will be used)
+			transport = undefined;
+
+			// Cache response headers
+			responseHeadersString = headers || "";
+
+			// Set readyState
+			jqXHR.readyState = status > 0 ? 4 : 0;
+
+			// Determine if successful
+			isSuccess = status >= 200 && status < 300 || status === 304;
+
+			// Get response data
+			if ( responses ) {
+				response = ajaxHandleResponses( s, jqXHR, responses );
+			}
+
+			// Convert no matter what (that way responseXXX fields are always set)
+			response = ajaxConvert( s, response, jqXHR, isSuccess );
+
+			// If successful, handle type chaining
+			if ( isSuccess ) {
+
+				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+				if ( s.ifModified ) {
+					modified = jqXHR.getResponseHeader( "Last-Modified" );
+					if ( modified ) {
+						jQuery.lastModified[ cacheURL ] = modified;
+					}
+					modified = jqXHR.getResponseHeader( "etag" );
+					if ( modified ) {
+						jQuery.etag[ cacheURL ] = modified;
+					}
+				}
+
+				// if no content
+				if ( status === 204 || s.type === "HEAD" ) {
+					statusText = "nocontent";
+
+				// if not modified
+				} else if ( status === 304 ) {
+					statusText = "notmodified";
+
+				// If we have data, let's convert it
+				} else {
+					statusText = response.state;
+					success = response.data;
+					error = response.error;
+					isSuccess = !error;
+				}
+			} else {
+
+				// Extract error from statusText and normalize for non-aborts
+				error = statusText;
+				if ( status || !statusText ) {
+					statusText = "error";
+					if ( status < 0 ) {
+						status = 0;
+					}
+				}
+			}
+
+			// Set data for the fake xhr object
+			jqXHR.status = status;
+			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
+
+			// Success/Error
+			if ( isSuccess ) {
+				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
+			} else {
+				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
+			}
+
+			// Status-dependent callbacks
+			jqXHR.statusCode( statusCode );
+			statusCode = undefined;
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
+					[ jqXHR, s, isSuccess ? success : error ] );
+			}
+
+			// Complete
+			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
+
+				// Handle the global AJAX counter
+				if ( !( --jQuery.active ) ) {
+					jQuery.event.trigger( "ajaxStop" );
+				}
+			}
+		}
+
+		return jqXHR;
+	},
+
+	getJSON: function( url, data, callback ) {
+		return jQuery.get( url, data, callback, "json" );
+	},
+
+	getScript: function( url, callback ) {
+		return jQuery.get( url, undefined, callback, "script" );
+	}
+} );
+
+jQuery.each( [ "get", "post" ], function( i, method ) {
+	jQuery[ method ] = function( url, data, callback, type ) {
+
+		// Shift arguments if data argument was omitted
+		if ( isFunction( data ) ) {
+			type = type || callback;
+			callback = data;
+			data = undefined;
+		}
+
+		// The url can be an options object (which then must have .url)
+		return jQuery.ajax( jQuery.extend( {
+			url: url,
+			type: method,
+			dataType: type,
+			data: data,
+			success: callback
+		}, jQuery.isPlainObject( url ) && url ) );
+	};
+} );
+
+
+jQuery._evalUrl = function( url, options ) {
+	return jQuery.ajax( {
+		url: url,
+
+		// Make this explicit, since user can override this through ajaxSetup (#11264)
+		type: "GET",
+		dataType: "script",
+		cache: true,
+		async: false,
+		global: false,
+
+		// Only evaluate the response if it is successful (gh-4126)
+		// dataFilter is not invoked for failure responses, so using it instead
+		// of the default converter is kludgy but it works.
+		converters: {
+			"text script": function() {}
+		},
+		dataFilter: function( response ) {
+			jQuery.globalEval( response, options );
+		}
+	} );
+};
+
+
+jQuery.fn.extend( {
+	wrapAll: function( html ) {
+		var wrap;
+
+		if ( this[ 0 ] ) {
+			if ( isFunction( html ) ) {
+				html = html.call( this[ 0 ] );
+			}
+
+			// The elements to wrap the target around
+			wrap = jQuery( html, this[ 0 ].ownerDocument ).eq( 0 ).clone( true );
+
+			if ( this[ 0 ].parentNode ) {
+				wrap.insertBefore( this[ 0 ] );
+			}
+
+			wrap.map( function() {
+				var elem = this;
+
+				while ( elem.firstElementChild ) {
+					elem = elem.firstElementChild;
+				}
+
+				return elem;
+			} ).append( this );
+		}
+
+		return this;
+	},
+
+	wrapInner: function( html ) {
+		if ( isFunction( html ) ) {
+			return this.each( function( i ) {
+				jQuery( this ).wrapInner( html.call( this, i ) );
+			} );
+		}
+
+		return this.each( function() {
+			var self = jQuery( this ),
+				contents = self.contents();
+
+			if ( contents.length ) {
+				contents.wrapAll( html );
+
+			} else {
+				self.append( html );
+			}
+		} );
+	},
+
+	wrap: function( html ) {
+		var htmlIsFunction = isFunction( html );
+
+		return this.each( function( i ) {
+			jQuery( this ).wrapAll( htmlIsFunction ? html.call( this, i ) : html );
+		} );
+	},
+
+	unwrap: function( selector ) {
+		this.parent( selector ).not( "body" ).each( function() {
+			jQuery( this ).replaceWith( this.childNodes );
+		} );
+		return this;
+	}
+} );
+
+
+jQuery.expr.pseudos.hidden = function( elem ) {
+	return !jQuery.expr.pseudos.visible( elem );
+};
+jQuery.expr.pseudos.visible = function( elem ) {
+	return !!( elem.offsetWidth || elem.offsetHeight || elem.getClientRects().length );
+};
+
+
+
+
+jQuery.ajaxSettings.xhr = function() {
+	try {
+		return new window.XMLHttpRequest();
+	} catch ( e ) {}
+};
+
+var xhrSuccessStatus = {
+
+		// File protocol always yields status code 0, assume 200
+		0: 200,
+
+		// Support: IE <=9 only
+		// #1450: sometimes IE returns 1223 when it should be 204
+		1223: 204
+	},
+	xhrSupported = jQuery.ajaxSettings.xhr();
+
+support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
+support.ajax = xhrSupported = !!xhrSupported;
+
+jQuery.ajaxTransport( function( options ) {
+	var callback, errorCallback;
+
+	// Cross domain only allowed if supported through XMLHttpRequest
+	if ( support.cors || xhrSupported && !options.crossDomain ) {
+		return {
+			send: function( headers, complete ) {
+				var i,
+					xhr = options.xhr();
+
+				xhr.open(
+					options.type,
+					options.url,
+					options.async,
+					options.username,
+					options.password
+				);
+
+				// Apply custom fields if provided
+				if ( options.xhrFields ) {
+					for ( i in options.xhrFields ) {
+						xhr[ i ] = options.xhrFields[ i ];
+					}
+				}
+
+				// Override mime type if needed
+				if ( options.mimeType && xhr.overrideMimeType ) {
+					xhr.overrideMimeType( options.mimeType );
+				}
+
+				// X-Requested-With header
+				// For cross-domain requests, seeing as conditions for a preflight are
+				// akin to a jigsaw puzzle, we simply never set it to be sure.
+				// (it can always be set on a per-request basis or even using ajaxSetup)
+				// For same-domain requests, won't change header if already provided.
+				if ( !options.crossDomain && !headers[ "X-Requested-With" ] ) {
+					headers[ "X-Requested-With" ] = "XMLHttpRequest";
+				}
+
+				// Set headers
+				for ( i in headers ) {
+					xhr.setRequestHeader( i, headers[ i ] );
+				}
+
+				// Callback
+				callback = function( type ) {
+					return function() {
+						if ( callback ) {
+							callback = errorCallback = xhr.onload =
+								xhr.onerror = xhr.onabort = xhr.ontimeout =
+									xhr.onreadystatechange = null;
+
+							if ( type === "abort" ) {
+								xhr.abort();
+							} else if ( type === "error" ) {
+
+								// Support: IE <=9 only
+								// On a manual native abort, IE9 throws
+								// errors on any property access that is not readyState
+								if ( typeof xhr.status !== "number" ) {
+									complete( 0, "error" );
+								} else {
+									complete(
+
+										// File: protocol always yields status 0; see #8605, #14207
+										xhr.status,
+										xhr.statusText
+									);
+								}
+							} else {
+								complete(
+									xhrSuccessStatus[ xhr.status ] || xhr.status,
+									xhr.statusText,
+
+									// Support: IE <=9 only
+									// IE9 has no XHR2 but throws on binary (trac-11426)
+									// For XHR2 non-text, let the caller handle it (gh-2498)
+									( xhr.responseType || "text" ) !== "text"  ||
+									typeof xhr.responseText !== "string" ?
+										{ binary: xhr.response } :
+										{ text: xhr.responseText },
+									xhr.getAllResponseHeaders()
+								);
+							}
+						}
+					};
+				};
+
+				// Listen to events
+				xhr.onload = callback();
+				errorCallback = xhr.onerror = xhr.ontimeout = callback( "error" );
+
+				// Support: IE 9 only
+				// Use onreadystatechange to replace onabort
+				// to handle uncaught aborts
+				if ( xhr.onabort !== undefined ) {
+					xhr.onabort = errorCallback;
+				} else {
+					xhr.onreadystatechange = function() {
+
+						// Check readyState before timeout as it changes
+						if ( xhr.readyState === 4 ) {
+
+							// Allow onerror to be called first,
+							// but that will not handle a native abort
+							// Also, save errorCallback to a variable
+							// as xhr.onerror cannot be accessed
+							window.setTimeout( function() {
+								if ( callback ) {
+									errorCallback();
+								}
+							} );
+						}
+					};
+				}
+
+				// Create the abort callback
+				callback = callback( "abort" );
+
+				try {
+
+					// Do send the request (this may raise an exception)
+					xhr.send( options.hasContent && options.data || null );
+				} catch ( e ) {
+
+					// #14683: Only rethrow if this hasn't been notified as an error yet
+					if ( callback ) {
+						throw e;
+					}
+				}
+			},
+
+			abort: function() {
+				if ( callback ) {
+					callback();
+				}
+			}
+		};
+	}
+} );
+
+
+
+
+// Prevent auto-execution of scripts when no explicit dataType was provided (See gh-2432)
+jQuery.ajaxPrefilter( function( s ) {
+	if ( s.crossDomain ) {
+		s.contents.script = false;
+	}
+} );
+
+// Install script dataType
+jQuery.ajaxSetup( {
+	accepts: {
+		script: "text/javascript, application/javascript, " +
+			"application/ecmascript, application/x-ecmascript"
+	},
+	contents: {
+		script: /\b(?:java|ecma)script\b/
+	},
+	converters: {
+		"text script": function( text ) {
+			jQuery.globalEval( text );
+			return text;
+		}
+	}
+} );
+
+// Handle cache's special case and crossDomain
+jQuery.ajaxPrefilter( "script", function( s ) {
+	if ( s.cache === undefined ) {
+		s.cache = false;
+	}
+	if ( s.crossDomain ) {
+		s.type = "GET";
+	}
+} );
+
+// Bind script tag hack transport
+jQuery.ajaxTransport( "script", function( s ) {
+
+	// This transport only deals with cross domain or forced-by-attrs requests
+	if ( s.crossDomain || s.scriptAttrs ) {
+		var script, callback;
+		return {
+			send: function( _, complete ) {
+				script = jQuery( "<script>" )
+					.attr( s.scriptAttrs || {} )
+					.prop( { charset: s.scriptCharset, src: s.url } )
+					.on( "load error", callback = function( evt ) {
+						script.remove();
+						callback = null;
+						if ( evt ) {
+							complete( evt.type === "error" ? 404 : 200, evt.type );
+						}
+					} );
+
+				// Use native DOM manipulation to avoid our domManip AJAX trickery
+				document.head.appendChild( script[ 0 ] );
+			},
+			abort: function() {
+				if ( callback ) {
+					callback();
+				}
+			}
+		};
+	}
+} );
+
+
+
+
+var oldCallbacks = [],
+	rjsonp = /(=)\?(?=&|$)|\?\?/;
+
+// Default jsonp settings
+jQuery.ajaxSetup( {
+	jsonp: "callback",
+	jsonpCallback: function() {
+		var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
+		this[ callback ] = true;
+		return callback;
+	}
+} );
+
+// Detect, normalize options and install callbacks for jsonp requests
+jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
+
+	var callbackName, overwritten, responseContainer,
+		jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
+			"url" :
+			typeof s.data === "string" &&
+				( s.contentType || "" )
+					.indexOf( "application/x-www-form-urlencoded" ) === 0 &&
+				rjsonp.test( s.data ) && "data"
+		);
+
+	// Handle iff the expected data type is "jsonp" or we have a parameter to set
+	if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
+
+		// Get callback name, remembering preexisting value associated with it
+		callbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?
+			s.jsonpCallback() :
+			s.jsonpCallback;
+
+		// Insert callback into url or form data
+		if ( jsonProp ) {
+			s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
+		} else if ( s.jsonp !== false ) {
+			s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
+		}
+
+		// Use data converter to retrieve json after script execution
+		s.converters[ "script json" ] = function() {
+			if ( !responseContainer ) {
+				jQuery.error( callbackName + " was not called" );
+			}
+			return responseContainer[ 0 ];
+		};
+
+		// Force json dataType
+		s.dataTypes[ 0 ] = "json";
+
+		// Install callback
+		overwritten = window[ callbackName ];
+		window[ callbackName ] = function() {
+			responseContainer = arguments;
+		};
+
+		// Clean-up function (fires after converters)
+		jqXHR.always( function() {
+
+			// If previous value didn't exist - remove it
+			if ( overwritten === undefined ) {
+				jQuery( window ).removeProp( callbackName );
+
+			// Otherwise restore preexisting value
+			} else {
+				window[ callbackName ] = overwritten;
+			}
+
+			// Save back as free
+			if ( s[ callbackName ] ) {
+
+				// Make sure that re-using the options doesn't screw things around
+				s.jsonpCallback = originalSettings.jsonpCallback;
+
+				// Save the callback name for future use
+				oldCallbacks.push( callbackName );
+			}
+
+			// Call if it was a function and we have a response
+			if ( responseContainer && isFunction( overwritten ) ) {
+				overwritten( responseContainer[ 0 ] );
+			}
+
+			responseContainer = overwritten = undefined;
+		} );
+
+		// Delegate to script
+		return "script";
+	}
+} );
+
+
+
+
+// Support: Safari 8 only
+// In Safari 8 documents created via document.implementation.createHTMLDocument
+// collapse sibling forms: the second one becomes a child of the first one.
+// Because of that, this security measure has to be disabled in Safari 8.
+// https://bugs.webkit.org/show_bug.cgi?id=137337
+support.createHTMLDocument = ( function() {
+	var body = document.implementation.createHTMLDocument( "" ).body;
+	body.innerHTML = "<form></form><form></form>";
+	return body.childNodes.length === 2;
+} )();
+
+
+// Argument "data" should be string of html
+// context (optional): If specified, the fragment will be created in this context,
+// defaults to document
+// keepScripts (optional): If true, will include scripts passed in the html string
+jQuery.parseHTML = function( data, context, keepScripts ) {
+	if ( typeof data !== "string" ) {
+		return [];
+	}
+	if ( typeof context === "boolean" ) {
+		keepScripts = context;
+		context = false;
+	}
+
+	var base, parsed, scripts;
+
+	if ( !context ) {
+
+		// Stop scripts or inline event handlers from being executed immediately
+		// by using document.implementation
+		if ( support.createHTMLDocument ) {
+			context = document.implementation.createHTMLDocument( "" );
+
+			// Set the base href for the created document
+			// so any parsed elements with URLs
+			// are based on the document's URL (gh-2965)
+			base = context.createElement( "base" );
+			base.href = document.location.href;
+			context.head.appendChild( base );
+		} else {
+			context = document;
+		}
+	}
+
+	parsed = rsingleTag.exec( data );
+	scripts = !keepScripts && [];
+
+	// Single tag
+	if ( parsed ) {
+		return [ context.createElement( parsed[ 1 ] ) ];
+	}
+
+	parsed = buildFragment( [ data ], context, scripts );
+
+	if ( scripts && scripts.length ) {
+		jQuery( scripts ).remove();
+	}
+
+	return jQuery.merge( [], parsed.childNodes );
+};
+
+
+/**
+ * Load a url into a page
+ */
+jQuery.fn.load = function( url, params, callback ) {
+	var selector, type, response,
+		self = this,
+		off = url.indexOf( " " );
+
+	if ( off > -1 ) {
+		selector = stripAndCollapse( url.slice( off ) );
+		url = url.slice( 0, off );
+	}
+
+	// If it's a function
+	if ( isFunction( params ) ) {
+
+		// We assume that it's the callback
+		callback = params;
+		params = undefined;
+
+	// Otherwise, build a param string
+	} else if ( params && typeof params === "object" ) {
+		type = "POST";
+	}
+
+	// If we have elements to modify, make the request
+	if ( self.length > 0 ) {
+		jQuery.ajax( {
+			url: url,
+
+			// If "type" variable is undefined, then "GET" method will be used.
+			// Make value of this field explicit since
+			// user can override it through ajaxSetup method
+			type: type || "GET",
+			dataType: "html",
+			data: params
+		} ).done( function( responseText ) {
+
+			// Save response for use in complete callback
+			response = arguments;
+
+			self.html( selector ?
+
+				// If a selector was specified, locate the right elements in a dummy div
+				// Exclude scripts to avoid IE 'Permission Denied' errors
+				jQuery( "<div>" ).append( jQuery.parseHTML( responseText ) ).find( selector ) :
+
+				// Otherwise use the full result
+				responseText );
+
+		// If the request succeeds, this function gets "data", "status", "jqXHR"
+		// but they are ignored because response was set above.
+		// If it fails, this function gets "jqXHR", "status", "error"
+		} ).always( callback && function( jqXHR, status ) {
+			self.each( function() {
+				callback.apply( this, response || [ jqXHR.responseText, status, jqXHR ] );
+			} );
+		} );
+	}
+
+	return this;
+};
+
+
+
+
+// Attach a bunch of functions for handling common AJAX events
+jQuery.each( [
+	"ajaxStart",
+	"ajaxStop",
+	"ajaxComplete",
+	"ajaxError",
+	"ajaxSuccess",
+	"ajaxSend"
+], function( i, type ) {
+	jQuery.fn[ type ] = function( fn ) {
+		return this.on( type, fn );
+	};
+} );
+
+
+
+
+jQuery.expr.pseudos.animated = function( elem ) {
+	return jQuery.grep( jQuery.timers, function( fn ) {
+		return elem === fn.elem;
+	} ).length;
+};
+
+
+
+
+jQuery.offset = {
+	setOffset: function( elem, options, i ) {
+		var curPosition, curLeft, curCSSTop, curTop, curOffset, curCSSLeft, calculatePosition,
+			position = jQuery.css( elem, "position" ),
+			curElem = jQuery( elem ),
+			props = {};
+
+		// Set position first, in-case top/left are set even on static elem
+		if ( position === "static" ) {
+			elem.style.position = "relative";
+		}
+
+		curOffset = curElem.offset();
+		curCSSTop = jQuery.css( elem, "top" );
+		curCSSLeft = jQuery.css( elem, "left" );
+		calculatePosition = ( position === "absolute" || position === "fixed" ) &&
+			( curCSSTop + curCSSLeft ).indexOf( "auto" ) > -1;
+
+		// Need to be able to calculate position if either
+		// top or left is auto and position is either absolute or fixed
+		if ( calculatePosition ) {
+			curPosition = curElem.position();
+			curTop = curPosition.top;
+			curLeft = curPosition.left;
+
+		} else {
+			curTop = parseFloat( curCSSTop ) || 0;
+			curLeft = parseFloat( curCSSLeft ) || 0;
+		}
+
+		if ( isFunction( options ) ) {
+
+			// Use jQuery.extend here to allow modification of coordinates argument (gh-1848)
+			options = options.call( elem, i, jQuery.extend( {}, curOffset ) );
+		}
+
+		if ( options.top != null ) {
+			props.top = ( options.top - curOffset.top ) + curTop;
+		}
+		if ( options.left != null ) {
+			props.left = ( options.left - curOffset.left ) + curLeft;
+		}
+
+		if ( "using" in options ) {
+			options.using.call( elem, props );
+
+		} else {
+			curElem.css( props );
+		}
+	}
+};
+
+jQuery.fn.extend( {
+
+	// offset() relates an element's border box to the document origin
+	offset: function( options ) {
+
+		// Preserve chaining for setter
+		if ( arguments.length ) {
+			return options === undefined ?
+				this :
+				this.each( function( i ) {
+					jQuery.offset.setOffset( this, options, i );
+				} );
+		}
+
+		var rect, win,
+			elem = this[ 0 ];
+
+		if ( !elem ) {
+			return;
+		}
+
+		// Return zeros for disconnected and hidden (display: none) elements (gh-2310)
+		// Support: IE <=11 only
+		// Running getBoundingClientRect on a
+		// disconnected node in IE throws an error
+		if ( !elem.getClientRects().length ) {
+			return { top: 0, left: 0 };
+		}
+
+		// Get document-relative position by adding viewport scroll to viewport-relative gBCR
+		rect = elem.getBoundingClientRect();
+		win = elem.ownerDocument.defaultView;
+		return {
+			top: rect.top + win.pageYOffset,
+			left: rect.left + win.pageXOffset
+		};
+	},
+
+	// position() relates an element's margin box to its offset parent's padding box
+	// This corresponds to the behavior of CSS absolute positioning
+	position: function() {
+		if ( !this[ 0 ] ) {
+			return;
+		}
+
+		var offsetParent, offset, doc,
+			elem = this[ 0 ],
+			parentOffset = { top: 0, left: 0 };
+
+		// position:fixed elements are offset from the viewport, which itself always has zero offset
+		if ( jQuery.css( elem, "position" ) === "fixed" ) {
+
+			// Assume position:fixed implies availability of getBoundingClientRect
+			offset = elem.getBoundingClientRect();
+
+		} else {
+			offset = this.offset();
+
+			// Account for the *real* offset parent, which can be the document or its root element
+			// when a statically positioned element is identified
+			doc = elem.ownerDocument;
+			offsetParent = elem.offsetParent || doc.documentElement;
+			while ( offsetParent &&
+				( offsetParent === doc.body || offsetParent === doc.documentElement ) &&
+				jQuery.css( offsetParent, "position" ) === "static" ) {
+
+				offsetParent = offsetParent.parentNode;
+			}
+			if ( offsetParent && offsetParent !== elem && offsetParent.nodeType === 1 ) {
+
+				// Incorporate borders into its offset, since they are outside its content origin
+				parentOffset = jQuery( offsetParent ).offset();
+				parentOffset.top += jQuery.css( offsetParent, "borderTopWidth", true );
+				parentOffset.left += jQuery.css( offsetParent, "borderLeftWidth", true );
+			}
+		}
+
+		// Subtract parent offsets and element margins
+		return {
+			top: offset.top - parentOffset.top - jQuery.css( elem, "marginTop", true ),
+			left: offset.left - parentOffset.left - jQuery.css( elem, "marginLeft", true )
+		};
+	},
+
+	// This method will return documentElement in the following cases:
+	// 1) For the element inside the iframe without offsetParent, this method will return
+	//    documentElement of the parent window
+	// 2) For the hidden or detached element
+	// 3) For body or html element, i.e. in case of the html node - it will return itself
+	//
+	// but those exceptions were never presented as a real life use-cases
+	// and might be considered as more preferable results.
+	//
+	// This logic, however, is not guaranteed and can change at any point in the future
+	offsetParent: function() {
+		return this.map( function() {
+			var offsetParent = this.offsetParent;
+
+			while ( offsetParent && jQuery.css( offsetParent, "position" ) === "static" ) {
+				offsetParent = offsetParent.offsetParent;
+			}
+
+			return offsetParent || documentElement;
+		} );
+	}
+} );
+
+// Create scrollLeft and scrollTop methods
+jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function( method, prop ) {
+	var top = "pageYOffset" === prop;
+
+	jQuery.fn[ method ] = function( val ) {
+		return access( this, function( elem, method, val ) {
+
+			// Coalesce documents and windows
+			var win;
+			if ( isWindow( elem ) ) {
+				win = elem;
+			} else if ( elem.nodeType === 9 ) {
+				win = elem.defaultView;
+			}
+
+			if ( val === undefined ) {
+				return win ? win[ prop ] : elem[ method ];
+			}
+
+			if ( win ) {
+				win.scrollTo(
+					!top ? val : win.pageXOffset,
+					top ? val : win.pageYOffset
+				);
+
+			} else {
+				elem[ method ] = val;
+			}
+		}, method, val, arguments.length );
+	};
+} );
+
+// Support: Safari <=7 - 9.1, Chrome <=37 - 49
+// Add the top/left cssHooks using jQuery.fn.position
+// Webkit bug: https://bugs.webkit.org/show_bug.cgi?id=29084
+// Blink bug: https://bugs.chromium.org/p/chromium/issues/detail?id=589347
+// getComputedStyle returns percent when specified for top/left/bottom/right;
+// rather than make the css module depend on the offset module, just check for it here
+jQuery.each( [ "top", "left" ], function( i, prop ) {
+	jQuery.cssHooks[ prop ] = addGetHookIf( support.pixelPosition,
+		function( elem, computed ) {
+			if ( computed ) {
+				computed = curCSS( elem, prop );
+
+				// If curCSS returns percentage, fallback to offset
+				return rnumnonpx.test( computed ) ?
+					jQuery( elem ).position()[ prop ] + "px" :
+					computed;
+			}
+		}
+	);
+} );
+
+
+// Create innerHeight, innerWidth, height, width, outerHeight and outerWidth methods
+jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
+	jQuery.each( { padding: "inner" + name, content: type, "": "outer" + name },
+		function( defaultExtra, funcName ) {
+
+		// Margin is only for outerHeight, outerWidth
+		jQuery.fn[ funcName ] = function( margin, value ) {
+			var chainable = arguments.length && ( defaultExtra || typeof margin !== "boolean" ),
+				extra = defaultExtra || ( margin === true || value === true ? "margin" : "border" );
+
+			return access( this, function( elem, type, value ) {
+				var doc;
+
+				if ( isWindow( elem ) ) {
+
+					// $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)
+					return funcName.indexOf( "outer" ) === 0 ?
+						elem[ "inner" + name ] :
+						elem.document.documentElement[ "client" + name ];
+				}
+
+				// Get document width or height
+				if ( elem.nodeType === 9 ) {
+					doc = elem.documentElement;
+
+					// Either scroll[Width/Height] or offset[Width/Height] or client[Width/Height],
+					// whichever is greatest
+					return Math.max(
+						elem.body[ "scroll" + name ], doc[ "scroll" + name ],
+						elem.body[ "offset" + name ], doc[ "offset" + name ],
+						doc[ "client" + name ]
+					);
+				}
+
+				return value === undefined ?
+
+					// Get width or height on the element, requesting but not forcing parseFloat
+					jQuery.css( elem, type, extra ) :
+
+					// Set width or height on the element
+					jQuery.style( elem, type, value, extra );
+			}, type, chainable ? margin : undefined, chainable );
+		};
+	} );
+} );
+
+
+jQuery.each( ( "blur focus focusin focusout resize scroll click dblclick " +
+	"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
+	"change select submit keydown keypress keyup contextmenu" ).split( " " ),
+	function( i, name ) {
+
+	// Handle event binding
+	jQuery.fn[ name ] = function( data, fn ) {
+		return arguments.length > 0 ?
+			this.on( name, null, data, fn ) :
+			this.trigger( name );
+	};
+} );
+
+jQuery.fn.extend( {
+	hover: function( fnOver, fnOut ) {
+		return this.mouseenter( fnOver ).mouseleave( fnOut || fnOver );
+	}
+} );
+
+
+
+
+jQuery.fn.extend( {
+
+	bind: function( types, data, fn ) {
+		return this.on( types, null, data, fn );
+	},
+	unbind: function( types, fn ) {
+		return this.off( types, null, fn );
+	},
+
+	delegate: function( selector, types, data, fn ) {
+		return this.on( types, selector, data, fn );
+	},
+	undelegate: function( selector, types, fn ) {
+
+		// ( namespace ) or ( selector, types [, fn] )
+		return arguments.length === 1 ?
+			this.off( selector, "**" ) :
+			this.off( types, selector || "**", fn );
+	}
+} );
+
+// Bind a function to a context, optionally partially applying any
+// arguments.
+// jQuery.proxy is deprecated to promote standards (specifically Function#bind)
+// However, it is not slated for removal any time soon
+jQuery.proxy = function( fn, context ) {
+	var tmp, args, proxy;
+
+	if ( typeof context === "string" ) {
+		tmp = fn[ context ];
+		context = fn;
+		fn = tmp;
+	}
+
+	// Quick check to determine if target is callable, in the spec
+	// this throws a TypeError, but we will just return undefined.
+	if ( !isFunction( fn ) ) {
+		return undefined;
+	}
+
+	// Simulated bind
+	args = slice.call( arguments, 2 );
+	proxy = function() {
+		return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
+	};
+
+	// Set the guid of unique handler to the same of original handler, so it can be removed
+	proxy.guid = fn.guid = fn.guid || jQuery.guid++;
+
+	return proxy;
+};
+
+jQuery.holdReady = function( hold ) {
+	if ( hold ) {
+		jQuery.readyWait++;
+	} else {
+		jQuery.ready( true );
+	}
+};
+jQuery.isArray = Array.isArray;
+jQuery.parseJSON = JSON.parse;
+jQuery.nodeName = nodeName;
+jQuery.isFunction = isFunction;
+jQuery.isWindow = isWindow;
+jQuery.camelCase = camelCase;
+jQuery.type = toType;
+
+jQuery.now = Date.now;
+
+jQuery.isNumeric = function( obj ) {
+
+	// As of jQuery 3.0, isNumeric is limited to
+	// strings and numbers (primitives or objects)
+	// that can be coerced to finite numbers (gh-2662)
+	var type = jQuery.type( obj );
+	return ( type === "number" || type === "string" ) &&
+
+		// parseFloat NaNs numeric-cast false positives ("")
+		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
+		// subtraction forces infinities to NaN
+		!isNaN( obj - parseFloat( obj ) );
+};
+
+
+
+
+// Register as a named AMD module, since jQuery can be concatenated with other
+// files that may use define, but not via a proper concatenation script that
+// understands anonymous AMD modules. A named AMD is safest and most robust
+// way to register. Lowercase jquery is used because AMD module names are
+// derived from file names, and jQuery is normally delivered in a lowercase
+// file name. Do this after creating the global so that if an AMD module wants
+// to call noConflict to hide this version of jQuery, it will work.
+
+// Note that for maximum portability, libraries that are not jQuery should
+// declare themselves as anonymous modules, and avoid setting a global if an
+// AMD loader is present. jQuery is a special case. For more information, see
+// https://github.com/jrburke/requirejs/wiki/Updating-existing-libraries#wiki-anon
+
+if ( typeof define === "function" && define.amd ) {
+	define( "jquery", [], function() {
+		return jQuery;
+	} );
+}
+
+
+
+
+var
+
+	// Map over jQuery in case of overwrite
+	_jQuery = window.jQuery,
+
+	// Map over the $ in case of overwrite
+	_$ = window.$;
+
+jQuery.noConflict = function( deep ) {
+	if ( window.$ === jQuery ) {
+		window.$ = _$;
+	}
+
+	if ( deep && window.jQuery === jQuery ) {
+		window.jQuery = _jQuery;
+	}
+
+	return jQuery;
+};
+
+// Expose jQuery and $ identifiers, even in AMD
+// (#7102#comment:10, https://github.com/jquery/jquery/pull/557)
+// and CommonJS for browser emulators (#13566)
+if ( !noGlobal ) {
+	window.jQuery = window.$ = jQuery;
+}
+
+
+
+
+return jQuery;
+} );

content/docs/mesher/1.6.3/_static/jquery.js

diff --git a/content/docs/mesher/1.6.3/_static/jquery.js b/content/docs/mesher/1.6.3/_static/jquery.js
new file mode 100644
index 0000000..a1c07fd
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/jquery.js
@@ -0,0 +1,2 @@
+/*! jQuery v3.4.1 | (c) JS Foundation and other contributors | jquery.org/license */
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content/docs/mesher/1.6.3/_static/js/modernizr.min.js

diff --git a/content/docs/mesher/1.6.3/_static/js/modernizr.min.js b/content/docs/mesher/1.6.3/_static/js/modernizr.min.js
new file mode 100644
index 0000000..f65d479
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/js/modernizr.min.js
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content/docs/mesher/1.6.3/_static/js/theme.js

diff --git a/content/docs/mesher/1.6.3/_static/js/theme.js b/content/docs/mesher/1.6.3/_static/js/theme.js
new file mode 100644
index 0000000..8555d79
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/js/theme.js
@@ -0,0 +1,3 @@
+/* sphinx_rtd_theme version 0.4.3 | MIT license */
+/* Built 20190212 16:02 */
+require=function r(s,a,l){function c(e,n){if(!a[e]){if(!s[e]){var i="function"==typeof require&&require;if(!n&&i)return i(e,!0);if(u)return u(e,!0);var t=new Error("Cannot find module '"+e+"'");throw t.code="MODULE_NOT_FOUND",t}var o=a[e]={exports:{}};s[e][0].call(o.exports,function(n){return c(s[e][1][n]||n)},o,o.exports,r,s,a,l)}return a[e].exports}for(var u="function"==typeof require&&require,n=0;n<l.length;n++)c(l[n]);return c}({"sphinx-rtd-theme":[function(n,e,i){var jQuery="undefined"!=typeof window?window.jQuery:n("jquery");e.exports.ThemeNav={navBar:null,win:null,winScroll:!1,winResize:!1,linkScroll:!1,winPosition:0,winHeight:null,docHeight:null,isRunning:!1,enable:function(e){var i=this;void 0===e&&(e=!0),i.isRunning||(i.isRunning=!0,jQuery(function(n){i.init(n),i.reset(),i.win.on("hashchange",i.reset),e&&i.win.on("scroll",function(){i.linkScroll||i.winScroll||(i.winScroll=!0,requestAnimationFrame(function(){i.onScroll()}))}),i.win.on("resize",function(){i.winResize||(i.winResize=!0,requestAnimationFrame(function(){i.onResize()}))}),i.onResize()}))},enableSticky:function(){this.enable(!0)},init:function(i){i(document);var t=this;this.navBar=i("div.wy-side-scroll:first"),this.win=i(window),i(document).on("click","[data-toggle='wy-nav-top']",function(){i("[data-toggle='wy-nav-shift']").toggleClass("shift"),i("[data-toggle='rst-versions']").toggleClass("shift")}).on("click",".wy-menu-vertical .current ul li a",function(){var n=i(this);i("[data-toggle='wy-nav-shift']").removeClass("shift"),i("[data-toggle='rst-versions']").toggleClass("shift"),t.toggleCurrent(n),t.hashChange()}).on("click","[data-toggle='rst-current-version']",function(){i("[data-toggle='rst-versions']").toggleClass("shift-up")}),i("table.docutils:not(.field-list,.footnote,.citation)").wrap("<div class='wy-table-responsive'></div>"),i("table.docutils.footnote").wrap("<div class='wy-table-responsive footnote'></div>"),i("table.docutils.citation").wrap("<div class='wy-table-responsive citation'></div>"),i(".wy-menu-vertical ul").not(".simple").siblings("a").each(function(){var e=i(this);expand=i('<span class="toctree-expand"></span>'),expand.on("click",function(n){return t.toggleCurrent(e),n.stopPropagation(),!1}),e.prepend(expand)})},reset:function(){var n=encodeURI(window.location.hash)||"#";try{var e=$(".wy-menu-vertical"),i=e.find('[href="'+n+'"]');if(0===i.length){var t=$('.document [id="'+n.substring(1)+'"]').closest("div.section");0===(i=e.find('[href="#'+t.attr("id")+'"]')).length&&(i=e.find('[href="#"]'))}0<i.length&&($(".wy-menu-vertical .current").removeClass("current"),i.addClass("current"),i.closest("li.toctree-l1").addClass("current"),i.closest("li.toctree-l1").parent().addClass("current"),i.closest("li.toctree-l1").addClass("current"),i.closest("li.toctree-l2").addClass("current"),i.closest("li.toctree-l3").addClass("current"),i.closest("li.toctree-l4").addClass("current"),i[0].scrollIntoView())}catch(o){console.log("Error expanding nav for anchor",o)}},onScroll:function(){this.winScroll=!1;var n=this.win.scrollTop(),e=n+this.winHeight,i=this.navBar.scrollTop()+(n-this.winPosition);n<0||e>this.docHeight||(this.navBar.scrollTop(i),this.winPosition=n)},onResize:function(){this.winResize=!1,this.winHeight=this.win.height(),this.docHeight=$(document).height()},hashChange:function(){this.linkScroll=!0,this.win.one("hashchange",function(){this.linkScroll=!1})},toggleCurrent:function(n){var e=n.closest("li");e.siblings("li.current").removeClass("current"),e.siblings().find("li.current").removeClass("current"),e.find("> ul li.current").removeClass("current"),e.toggleClass("current")}},"undefined"!=typeof window&&(window.SphinxRtdTheme={Navigation:e.exports.ThemeNav,StickyNav:e.exports.ThemeNav}),function(){for(var r=0,n=["ms","moz","webkit","o"],e=0;e<n.length&&!window.requestAnimationFrame;++e)window.requestAnimationFrame=window[n[e]+"RequestAnimationFrame"],window.cancelAnimationFrame=window[n[e]+"CancelAnimationFrame"]||window[n[e]+"CancelRequestAnimationFrame"];window.requestAnimationFrame||(window.requestAnimationFrame=function(n,e){var i=(new Date).getTime(),t=Math.max(0,16-(i-r)),o=window.setTimeout(function(){n(i+t)},t);return r=i+t,o}),window.cancelAnimationFrame||(window.cancelAnimationFrame=function(n){clearTimeout(n)})}()},{jquery:"jquery"}]},{},["sphinx-rtd-theme"]);
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content/docs/mesher/1.6.3/_static/language_data.js

diff --git a/content/docs/mesher/1.6.3/_static/language_data.js b/content/docs/mesher/1.6.3/_static/language_data.js
new file mode 100644
index 0000000..5266fb1
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/language_data.js
@@ -0,0 +1,297 @@
+/*
+ * language_data.js
+ * ~~~~~~~~~~~~~~~~
+ *
+ * This script contains the language-specific data used by searchtools.js,
+ * namely the list of stopwords, stemmer, scorer and splitter.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+var stopwords = ["a","and","are","as","at","be","but","by","for","if","in","into","is","it","near","no","not","of","on","or","such","that","the","their","then","there","these","they","this","to","was","will","with"];
+
+
+/* Non-minified version JS is _stemmer.js if file is provided */ 
+/**
+ * Porter Stemmer
+ */
+var Stemmer = function() {
+
+  var step2list = {
+    ational: 'ate',
+    tional: 'tion',
+    enci: 'ence',
+    anci: 'ance',
+    izer: 'ize',
+    bli: 'ble',
+    alli: 'al',
+    entli: 'ent',
+    eli: 'e',
+    ousli: 'ous',
+    ization: 'ize',
+    ation: 'ate',
+    ator: 'ate',
+    alism: 'al',
+    iveness: 'ive',
+    fulness: 'ful',
+    ousness: 'ous',
+    aliti: 'al',
+    iviti: 'ive',
+    biliti: 'ble',
+    logi: 'log'
+  };
+
+  var step3list = {
+    icate: 'ic',
+    ative: '',
+    alize: 'al',
+    iciti: 'ic',
+    ical: 'ic',
+    ful: '',
+    ness: ''
+  };
+
+  var c = "[^aeiou]";          // consonant
+  var v = "[aeiouy]";          // vowel
+  var C = c + "[^aeiouy]*";    // consonant sequence
+  var V = v + "[aeiou]*";      // vowel sequence
+
+  var mgr0 = "^(" + C + ")?" + V + C;                      // [C]VC... is m>0
+  var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$";    // [C]VC[V] is m=1
+  var mgr1 = "^(" + C + ")?" + V + C + V + C;              // [C]VCVC... is m>1
+  var s_v   = "^(" + C + ")?" + v;                         // vowel in stem
+
+  this.stemWord = function (w) {
+    var stem;
+    var suffix;
+    var firstch;
+    var origword = w;
+
+    if (w.length < 3)
+      return w;
+
+    var re;
+    var re2;
+    var re3;
+    var re4;
+
+    firstch = w.substr(0,1);
+    if (firstch == "y")
+      w = firstch.toUpperCase() + w.substr(1);
+
+    // Step 1a
+    re = /^(.+?)(ss|i)es$/;
+    re2 = /^(.+?)([^s])s$/;
+
+    if (re.test(w))
+      w = w.replace(re,"$1$2");
+    else if (re2.test(w))
+      w = w.replace(re2,"$1$2");
+
+    // Step 1b
+    re = /^(.+?)eed$/;
+    re2 = /^(.+?)(ed|ing)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      re = new RegExp(mgr0);
+      if (re.test(fp[1])) {
+        re = /.$/;
+        w = w.replace(re,"");
+      }
+    }
+    else if (re2.test(w)) {
+      var fp = re2.exec(w);
+      stem = fp[1];
+      re2 = new RegExp(s_v);
+      if (re2.test(stem)) {
+        w = stem;
+        re2 = /(at|bl|iz)$/;
+        re3 = new RegExp("([^aeiouylsz])\\1$");
+        re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");
+        if (re2.test(w))
+          w = w + "e";
+        else if (re3.test(w)) {
+          re = /.$/;
+          w = w.replace(re,"");
+        }
+        else if (re4.test(w))
+          w = w + "e";
+      }
+    }
+
+    // Step 1c
+    re = /^(.+?)y$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      re = new RegExp(s_v);
+      if (re.test(stem))
+        w = stem + "i";
+    }
+
+    // Step 2
+    re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      suffix = fp[2];
+      re = new RegExp(mgr0);
+      if (re.test(stem))
+        w = stem + step2list[suffix];
+    }
+
+    // Step 3
+    re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      suffix = fp[2];
+      re = new RegExp(mgr0);
+      if (re.test(stem))
+        w = stem + step3list[suffix];
+    }
+
+    // Step 4
+    re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;
+    re2 = /^(.+?)(s|t)(ion)$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      re = new RegExp(mgr1);
+      if (re.test(stem))
+        w = stem;
+    }
+    else if (re2.test(w)) {
+      var fp = re2.exec(w);
+      stem = fp[1] + fp[2];
+      re2 = new RegExp(mgr1);
+      if (re2.test(stem))
+        w = stem;
+    }
+
+    // Step 5
+    re = /^(.+?)e$/;
+    if (re.test(w)) {
+      var fp = re.exec(w);
+      stem = fp[1];
+      re = new RegExp(mgr1);
+      re2 = new RegExp(meq1);
+      re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");
+      if (re.test(stem) || (re2.test(stem) && !(re3.test(stem))))
+        w = stem;
+    }
+    re = /ll$/;
+    re2 = new RegExp(mgr1);
+    if (re.test(w) && re2.test(w)) {
+      re = /.$/;
+      w = w.replace(re,"");
+    }
+
+    // and turn initial Y back to y
+    if (firstch == "y")
+      w = firstch.toLowerCase() + w.substr(1);
+    return w;
+  }
+}
+
+
+
+
+
+var splitChars = (function() {
+    var result = {};
+    var singles = [96, 180, 187, 191, 215, 247, 749, 885, 903, 907, 909, 930, 1014, 1648,
+         1748, 1809, 2416, 2473, 2481, 2526, 2601, 2609, 2612, 2615, 2653, 2702,
+         2706, 2729, 2737, 2740, 2857, 2865, 2868, 2910, 2928, 2948, 2961, 2971,
+         2973, 3085, 3089, 3113, 3124, 3213, 3217, 3241, 3252, 3295, 3341, 3345,
+         3369, 3506, 3516, 3633, 3715, 3721, 3736, 3744, 3748, 3750, 3756, 3761,
+         3781, 3912, 4239, 4347, 4681, 4695, 4697, 4745, 4785, 4799, 4801, 4823,
+         4881, 5760, 5901, 5997, 6313, 7405, 8024, 8026, 8028, 8030, 8117, 8125,
+         8133, 8181, 8468, 8485, 8487, 8489, 8494, 8527, 11311, 11359, 11687, 11695,
+         11703, 11711, 11719, 11727, 11735, 12448, 12539, 43010, 43014, 43019, 43587,
+         43696, 43713, 64286, 64297, 64311, 64317, 64319, 64322, 64325, 65141];
+    var i, j, start, end;
+    for (i = 0; i < singles.length; i++) {
+        result[singles[i]] = true;
+    }
+    var ranges = [[0, 47], [58, 64], [91, 94], [123, 169], [171, 177], [182, 184], [706, 709],
+         [722, 735], [741, 747], [751, 879], [888, 889], [894, 901], [1154, 1161],
+         [1318, 1328], [1367, 1368], [1370, 1376], [1416, 1487], [1515, 1519], [1523, 1568],
+         [1611, 1631], [1642, 1645], [1750, 1764], [1767, 1773], [1789, 1790], [1792, 1807],
+         [1840, 1868], [1958, 1968], [1970, 1983], [2027, 2035], [2038, 2041], [2043, 2047],
+         [2070, 2073], [2075, 2083], [2085, 2087], [2089, 2307], [2362, 2364], [2366, 2383],
+         [2385, 2391], [2402, 2405], [2419, 2424], [2432, 2436], [2445, 2446], [2449, 2450],
+         [2483, 2485], [2490, 2492], [2494, 2509], [2511, 2523], [2530, 2533], [2546, 2547],
+         [2554, 2564], [2571, 2574], [2577, 2578], [2618, 2648], [2655, 2661], [2672, 2673],
+         [2677, 2692], [2746, 2748], [2750, 2767], [2769, 2783], [2786, 2789], [2800, 2820],
+         [2829, 2830], [2833, 2834], [2874, 2876], [2878, 2907], [2914, 2917], [2930, 2946],
+         [2955, 2957], [2966, 2968], [2976, 2978], [2981, 2983], [2987, 2989], [3002, 3023],
+         [3025, 3045], [3059, 3076], [3130, 3132], [3134, 3159], [3162, 3167], [3170, 3173],
+         [3184, 3191], [3199, 3204], [3258, 3260], [3262, 3293], [3298, 3301], [3312, 3332],
+         [3386, 3388], [3390, 3423], [3426, 3429], [3446, 3449], [3456, 3460], [3479, 3481],
+         [3518, 3519], [3527, 3584], [3636, 3647], [3655, 3663], [3674, 3712], [3717, 3718],
+         [3723, 3724], [3726, 3731], [3752, 3753], [3764, 3772], [3774, 3775], [3783, 3791],
+         [3802, 3803], [3806, 3839], [3841, 3871], [3892, 3903], [3949, 3975], [3980, 4095],
+         [4139, 4158], [4170, 4175], [4182, 4185], [4190, 4192], [4194, 4196], [4199, 4205],
+         [4209, 4212], [4226, 4237], [4250, 4255], [4294, 4303], [4349, 4351], [4686, 4687],
+         [4702, 4703], [4750, 4751], [4790, 4791], [4806, 4807], [4886, 4887], [4955, 4968],
+         [4989, 4991], [5008, 5023], [5109, 5120], [5741, 5742], [5787, 5791], [5867, 5869],
+         [5873, 5887], [5906, 5919], [5938, 5951], [5970, 5983], [6001, 6015], [6068, 6102],
+         [6104, 6107], [6109, 6111], [6122, 6127], [6138, 6159], [6170, 6175], [6264, 6271],
+         [6315, 6319], [6390, 6399], [6429, 6469], [6510, 6511], [6517, 6527], [6572, 6592],
+         [6600, 6607], [6619, 6655], [6679, 6687], [6741, 6783], [6794, 6799], [6810, 6822],
+         [6824, 6916], [6964, 6980], [6988, 6991], [7002, 7042], [7073, 7085], [7098, 7167],
+         [7204, 7231], [7242, 7244], [7294, 7400], [7410, 7423], [7616, 7679], [7958, 7959],
+         [7966, 7967], [8006, 8007], [8014, 8015], [8062, 8063], [8127, 8129], [8141, 8143],
+         [8148, 8149], [8156, 8159], [8173, 8177], [8189, 8303], [8306, 8307], [8314, 8318],
+         [8330, 8335], [8341, 8449], [8451, 8454], [8456, 8457], [8470, 8472], [8478, 8483],
+         [8506, 8507], [8512, 8516], [8522, 8525], [8586, 9311], [9372, 9449], [9472, 10101],
+         [10132, 11263], [11493, 11498], [11503, 11516], [11518, 11519], [11558, 11567],
+         [11622, 11630], [11632, 11647], [11671, 11679], [11743, 11822], [11824, 12292],
+         [12296, 12320], [12330, 12336], [12342, 12343], [12349, 12352], [12439, 12444],
+         [12544, 12548], [12590, 12592], [12687, 12689], [12694, 12703], [12728, 12783],
+         [12800, 12831], [12842, 12880], [12896, 12927], [12938, 12976], [12992, 13311],
+         [19894, 19967], [40908, 40959], [42125, 42191], [42238, 42239], [42509, 42511],
+         [42540, 42559], [42592, 42593], [42607, 42622], [42648, 42655], [42736, 42774],
+         [42784, 42785], [42889, 42890], [42893, 43002], [43043, 43055], [43062, 43071],
+         [43124, 43137], [43188, 43215], [43226, 43249], [43256, 43258], [43260, 43263],
+         [43302, 43311], [43335, 43359], [43389, 43395], [43443, 43470], [43482, 43519],
+         [43561, 43583], [43596, 43599], [43610, 43615], [43639, 43641], [43643, 43647],
+         [43698, 43700], [43703, 43704], [43710, 43711], [43715, 43738], [43742, 43967],
+         [44003, 44015], [44026, 44031], [55204, 55215], [55239, 55242], [55292, 55295],
+         [57344, 63743], [64046, 64047], [64110, 64111], [64218, 64255], [64263, 64274],
+         [64280, 64284], [64434, 64466], [64830, 64847], [64912, 64913], [64968, 65007],
+         [65020, 65135], [65277, 65295], [65306, 65312], [65339, 65344], [65371, 65381],
+         [65471, 65473], [65480, 65481], [65488, 65489], [65496, 65497]];
+    for (i = 0; i < ranges.length; i++) {
+        start = ranges[i][0];
+        end = ranges[i][1];
+        for (j = start; j <= end; j++) {
+            result[j] = true;
+        }
+    }
+    return result;
+})();
+
+function splitQuery(query) {
+    var result = [];
+    var start = -1;
+    for (var i = 0; i < query.length; i++) {
+        if (splitChars[query.charCodeAt(i)]) {
+            if (start !== -1) {
+                result.push(query.slice(start, i));
+                start = -1;
+            }
+        } else if (start === -1) {
+            start = i;
+        }
+    }
+    if (start !== -1) {
+        result.push(query.slice(start));
+    }
+    return result;
+}
+
+

content/docs/mesher/1.6.3/_static/minus.png

diff --git a/content/docs/mesher/1.6.3/_static/minus.png b/content/docs/mesher/1.6.3/_static/minus.png
new file mode 100644
index 0000000..d96755f
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/minus.png
Binary files differ

content/docs/mesher/1.6.3/_static/plus.png

diff --git a/content/docs/mesher/1.6.3/_static/plus.png b/content/docs/mesher/1.6.3/_static/plus.png
new file mode 100644
index 0000000..7107cec
--- /dev/null
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Binary files differ

content/docs/mesher/1.6.3/_static/pygments.css

diff --git a/content/docs/mesher/1.6.3/_static/pygments.css b/content/docs/mesher/1.6.3/_static/pygments.css
new file mode 100644
index 0000000..20c4814
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+++ b/content/docs/mesher/1.6.3/_static/pygments.css
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+.highlight .hll { background-color: #ffffcc }
+.highlight  { background: #eeffcc; }
+.highlight .c { color: #408090; font-style: italic } /* Comment */
+.highlight .err { border: 1px solid #FF0000 } /* Error */
+.highlight .k { color: #007020; font-weight: bold } /* Keyword */
+.highlight .o { color: #666666 } /* Operator */
+.highlight .ch { color: #408090; font-style: italic } /* Comment.Hashbang */
+.highlight .cm { color: #408090; font-style: italic } /* Comment.Multiline */
+.highlight .cp { color: #007020 } /* Comment.Preproc */
+.highlight .cpf { color: #408090; font-style: italic } /* Comment.PreprocFile */
+.highlight .c1 { color: #408090; font-style: italic } /* Comment.Single */
+.highlight .cs { color: #408090; background-color: #fff0f0 } /* Comment.Special */
+.highlight .gd { color: #A00000 } /* Generic.Deleted */
+.highlight .ge { font-style: italic } /* Generic.Emph */
+.highlight .gr { color: #FF0000 } /* Generic.Error */
+.highlight .gh { color: #000080; font-weight: bold } /* Generic.Heading */
+.highlight .gi { color: #00A000 } /* Generic.Inserted */
+.highlight .go { color: #333333 } /* Generic.Output */
+.highlight .gp { color: #c65d09; font-weight: bold } /* Generic.Prompt */
+.highlight .gs { font-weight: bold } /* Generic.Strong */
+.highlight .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
+.highlight .gt { color: #0044DD } /* Generic.Traceback */
+.highlight .kc { color: #007020; font-weight: bold } /* Keyword.Constant */
+.highlight .kd { color: #007020; font-weight: bold } /* Keyword.Declaration */
+.highlight .kn { color: #007020; font-weight: bold } /* Keyword.Namespace */
+.highlight .kp { color: #007020 } /* Keyword.Pseudo */
+.highlight .kr { color: #007020; font-weight: bold } /* Keyword.Reserved */
+.highlight .kt { color: #902000 } /* Keyword.Type */
+.highlight .m { color: #208050 } /* Literal.Number */
+.highlight .s { color: #4070a0 } /* Literal.String */
+.highlight .na { color: #4070a0 } /* Name.Attribute */
+.highlight .nb { color: #007020 } /* Name.Builtin */
+.highlight .nc { color: #0e84b5; font-weight: bold } /* Name.Class */
+.highlight .no { color: #60add5 } /* Name.Constant */
+.highlight .nd { color: #555555; font-weight: bold } /* Name.Decorator */
+.highlight .ni { color: #d55537; font-weight: bold } /* Name.Entity */
+.highlight .ne { color: #007020 } /* Name.Exception */
+.highlight .nf { color: #06287e } /* Name.Function */
+.highlight .nl { color: #002070; font-weight: bold } /* Name.Label */
+.highlight .nn { color: #0e84b5; font-weight: bold } /* Name.Namespace */
+.highlight .nt { color: #062873; font-weight: bold } /* Name.Tag */
+.highlight .nv { color: #bb60d5 } /* Name.Variable */
+.highlight .ow { color: #007020; font-weight: bold } /* Operator.Word */
+.highlight .w { color: #bbbbbb } /* Text.Whitespace */
+.highlight .mb { color: #208050 } /* Literal.Number.Bin */
+.highlight .mf { color: #208050 } /* Literal.Number.Float */
+.highlight .mh { color: #208050 } /* Literal.Number.Hex */
+.highlight .mi { color: #208050 } /* Literal.Number.Integer */
+.highlight .mo { color: #208050 } /* Literal.Number.Oct */
+.highlight .sa { color: #4070a0 } /* Literal.String.Affix */
+.highlight .sb { color: #4070a0 } /* Literal.String.Backtick */
+.highlight .sc { color: #4070a0 } /* Literal.String.Char */
+.highlight .dl { color: #4070a0 } /* Literal.String.Delimiter */
+.highlight .sd { color: #4070a0; font-style: italic } /* Literal.String.Doc */
+.highlight .s2 { color: #4070a0 } /* Literal.String.Double */
+.highlight .se { color: #4070a0; font-weight: bold } /* Literal.String.Escape */
+.highlight .sh { color: #4070a0 } /* Literal.String.Heredoc */
+.highlight .si { color: #70a0d0; font-style: italic } /* Literal.String.Interpol */
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+.highlight .vi { color: #bb60d5 } /* Name.Variable.Instance */
+.highlight .vm { color: #bb60d5 } /* Name.Variable.Magic */
+.highlight .il { color: #208050 } /* Literal.Number.Integer.Long */
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content/docs/mesher/1.6.3/_static/searchtools.js

diff --git a/content/docs/mesher/1.6.3/_static/searchtools.js b/content/docs/mesher/1.6.3/_static/searchtools.js
new file mode 100644
index 0000000..6031f99
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/searchtools.js
@@ -0,0 +1,506 @@
+/*
+ * searchtools.js
+ * ~~~~~~~~~~~~~~~~
+ *
+ * Sphinx JavaScript utilities for the full-text search.
+ *
+ * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+if (!Scorer) {
+  /**
+   * Simple result scoring code.
+   */
+  var Scorer = {
+    // Implement the following function to further tweak the score for each result
+    // The function takes a result array [filename, title, anchor, descr, score]
+    // and returns the new score.
+    /*
+    score: function(result) {
+      return result[4];
+    },
+    */
+
+    // query matches the full name of an object
+    objNameMatch: 11,
+    // or matches in the last dotted part of the object name
+    objPartialMatch: 6,
+    // Additive scores depending on the priority of the object
+    objPrio: {0:  15,   // used to be importantResults
+              1:  5,   // used to be objectResults
+              2: -5},  // used to be unimportantResults
+    //  Used when the priority is not in the mapping.
+    objPrioDefault: 0,
+
+    // query found in title
+    title: 15,
+    partialTitle: 7,
+    // query found in terms
+    term: 5,
+    partialTerm: 2
+  };
+}
+
+if (!splitQuery) {
+  function splitQuery(query) {
+    return query.split(/\s+/);
+  }
+}
+
+/**
+ * Search Module
+ */
+var Search = {
+
+  _index : null,
+  _queued_query : null,
+  _pulse_status : -1,
+
+  htmlToText : function(htmlString) {
+      var htmlElement = document.createElement('span');
+      htmlElement.innerHTML = htmlString;
+      $(htmlElement).find('.headerlink').remove();
+      docContent = $(htmlElement).find('[role=main]')[0];
+      return docContent.textContent || docContent.innerText;
+  },
+
+  init : function() {
+      var params = $.getQueryParameters();
+      if (params.q) {
+          var query = params.q[0];
+          $('input[name="q"]')[0].value = query;
+          this.performSearch(query);
+      }
+  },
+
+  loadIndex : function(url) {
+    $.ajax({type: "GET", url: url, data: null,
+            dataType: "script", cache: true,
+            complete: function(jqxhr, textstatus) {
+              if (textstatus != "success") {
+                document.getElementById("searchindexloader").src = url;
+              }
+            }});
+  },
+
+  setIndex : function(index) {
+    var q;
+    this._index = index;
+    if ((q = this._queued_query) !== null) {
+      this._queued_query = null;
+      Search.query(q);
+    }
+  },
+
+  hasIndex : function() {
+      return this._index !== null;
+  },
+
+  deferQuery : function(query) {
+      this._queued_query = query;
+  },
+
+  stopPulse : function() {
+      this._pulse_status = 0;
+  },
+
+  startPulse : function() {
+    if (this._pulse_status >= 0)
+        return;
+    function pulse() {
+      var i;
+      Search._pulse_status = (Search._pulse_status + 1) % 4;
+      var dotString = '';
+      for (i = 0; i < Search._pulse_status; i++)
+        dotString += '.';
+      Search.dots.text(dotString);
+      if (Search._pulse_status > -1)
+        window.setTimeout(pulse, 500);
+    }
+    pulse();
+  },
+
+  /**
+   * perform a search for something (or wait until index is loaded)
+   */
+  performSearch : function(query) {
+    // create the required interface elements
+    this.out = $('#search-results');
+    this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
+    this.dots = $('<span></span>').appendTo(this.title);
+    this.status = $('<p class="search-summary">&nbsp;</p>').appendTo(this.out);
+    this.output = $('<ul class="search"/>').appendTo(this.out);
+
+    $('#search-progress').text(_('Preparing search...'));
+    this.startPulse();
+
+    // index already loaded, the browser was quick!
+    if (this.hasIndex())
+      this.query(query);
+    else
+      this.deferQuery(query);
+  },
+
+  /**
+   * execute search (requires search index to be loaded)
+   */
+  query : function(query) {
+    var i;
+
+    // stem the searchterms and add them to the correct list
+    var stemmer = new Stemmer();
+    var searchterms = [];
+    var excluded = [];
+    var hlterms = [];
+    var tmp = splitQuery(query);
+    var objectterms = [];
+    for (i = 0; i < tmp.length; i++) {
+      if (tmp[i] !== "") {
+          objectterms.push(tmp[i].toLowerCase());
+      }
+
+      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
+          tmp[i] === "") {
+        // skip this "word"
+        continue;
+      }
+      // stem the word
+      var word = stemmer.stemWord(tmp[i].toLowerCase());
+      // prevent stemmer from cutting word smaller than two chars
+      if(word.length < 3 && tmp[i].length >= 3) {
+        word = tmp[i];
+      }
+      var toAppend;
+      // select the correct list
+      if (word[0] == '-') {
+        toAppend = excluded;
+        word = word.substr(1);
+      }
+      else {
+        toAppend = searchterms;
+        hlterms.push(tmp[i].toLowerCase());
+      }
+      // only add if not already in the list
+      if (!$u.contains(toAppend, word))
+        toAppend.push(word);
+    }
+    var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
+
+    // console.debug('SEARCH: searching for:');
+    // console.info('required: ', searchterms);
+    // console.info('excluded: ', excluded);
+
+    // prepare search
+    var terms = this._index.terms;
+    var titleterms = this._index.titleterms;
+
+    // array of [filename, title, anchor, descr, score]
+    var results = [];
+    $('#search-progress').empty();
+
+    // lookup as object
+    for (i = 0; i < objectterms.length; i++) {
+      var others = [].concat(objectterms.slice(0, i),
+                             objectterms.slice(i+1, objectterms.length));
+      results = results.concat(this.performObjectSearch(objectterms[i], others));
+    }
+
+    // lookup as search terms in fulltext
+    results = results.concat(this.performTermsSearch(searchterms, excluded, terms, titleterms));
+
+    // let the scorer override scores with a custom scoring function
+    if (Scorer.score) {
+      for (i = 0; i < results.length; i++)
+        results[i][4] = Scorer.score(results[i]);
+    }
+
+    // now sort the results by score (in opposite order of appearance, since the
+    // display function below uses pop() to retrieve items) and then
+    // alphabetically
+    results.sort(function(a, b) {
+      var left = a[4];
+      var right = b[4];
+      if (left > right) {
+        return 1;
+      } else if (left < right) {
+        return -1;
+      } else {
+        // same score: sort alphabetically
+        left = a[1].toLowerCase();
+        right = b[1].toLowerCase();
+        return (left > right) ? -1 : ((left < right) ? 1 : 0);
+      }
+    });
+
+    // for debugging
+    //Search.lastresults = results.slice();  // a copy
+    //console.info('search results:', Search.lastresults);
+
+    // print the results
+    var resultCount = results.length;
+    function displayNextItem() {
+      // results left, load the summary and display it
+      if (results.length) {
+        var item = results.pop();
+        var listItem = $('<li style="display:none"></li>');
+        if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
+          // dirhtml builder
+          var dirname = item[0] + '/';
+          if (dirname.match(/\/index\/$/)) {
+            dirname = dirname.substring(0, dirname.length-6);
+          } else if (dirname == 'index/') {
+            dirname = '';
+          }
+          listItem.append($('<a/>').attr('href',
+            DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
+            highlightstring + item[2]).html(item[1]));
+        } else {
+          // normal html builders
+          listItem.append($('<a/>').attr('href',
+            item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
+            highlightstring + item[2]).html(item[1]));
+        }
+        if (item[3]) {
+          listItem.append($('<span> (' + item[3] + ')</span>'));
+          Search.output.append(listItem);
+          listItem.slideDown(5, function() {
+            displayNextItem();
+          });
+        } else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
+          $.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX,
+                  dataType: "text",
+                  complete: function(jqxhr, textstatus) {
+                    var data = jqxhr.responseText;
+                    if (data !== '' && data !== undefined) {
+                      listItem.append(Search.makeSearchSummary(data, searchterms, hlterms));
+                    }
+                    Search.output.append(listItem);
+                    listItem.slideDown(5, function() {
+                      displayNextItem();
+                    });
+                  }});
+        } else {
+          // no source available, just display title
+          Search.output.append(listItem);
+          listItem.slideDown(5, function() {
+            displayNextItem();
+          });
+        }
+      }
+      // search finished, update title and status message
+      else {
+        Search.stopPulse();
+        Search.title.text(_('Search Results'));
+        if (!resultCount)
+          Search.status.text(_('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.'));
+        else
+            Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
+        Search.status.fadeIn(500);
+      }
+    }
+    displayNextItem();
+  },
+
+  /**
+   * search for object names
+   */
+  performObjectSearch : function(object, otherterms) {
+    var filenames = this._index.filenames;
+    var docnames = this._index.docnames;
+    var objects = this._index.objects;
+    var objnames = this._index.objnames;
+    var titles = this._index.titles;
+
+    var i;
+    var results = [];
+
+    for (var prefix in objects) {
+      for (var name in objects[prefix]) {
+        var fullname = (prefix ? prefix + '.' : '') + name;
+        var fullnameLower = fullname.toLowerCase()
+        if (fullnameLower.indexOf(object) > -1) {
+          var score = 0;
+          var parts = fullnameLower.split('.');
+          // check for different match types: exact matches of full name or
+          // "last name" (i.e. last dotted part)
+          if (fullnameLower == object || parts[parts.length - 1] == object) {
+            score += Scorer.objNameMatch;
+          // matches in last name
+          } else if (parts[parts.length - 1].indexOf(object) > -1) {
+            score += Scorer.objPartialMatch;
+          }
+          var match = objects[prefix][name];
+          var objname = objnames[match[1]][2];
+          var title = titles[match[0]];
+          // If more than one term searched for, we require other words to be
+          // found in the name/title/description
+          if (otherterms.length > 0) {
+            var haystack = (prefix + ' ' + name + ' ' +
+                            objname + ' ' + title).toLowerCase();
+            var allfound = true;
+            for (i = 0; i < otherterms.length; i++) {
+              if (haystack.indexOf(otherterms[i]) == -1) {
+                allfound = false;
+                break;
+              }
+            }
+            if (!allfound) {
+              continue;
+            }
+          }
+          var descr = objname + _(', in ') + title;
+
+          var anchor = match[3];
+          if (anchor === '')
+            anchor = fullname;
+          else if (anchor == '-')
+            anchor = objnames[match[1]][1] + '-' + fullname;
+          // add custom score for some objects according to scorer
+          if (Scorer.objPrio.hasOwnProperty(match[2])) {
+            score += Scorer.objPrio[match[2]];
+          } else {
+            score += Scorer.objPrioDefault;
+          }
+          results.push([docnames[match[0]], fullname, '#'+anchor, descr, score, filenames[match[0]]]);
+        }
+      }
+    }
+
+    return results;
+  },
+
+  /**
+   * search for full-text terms in the index
+   */
+  performTermsSearch : function(searchterms, excluded, terms, titleterms) {
+    var docnames = this._index.docnames;
+    var filenames = this._index.filenames;
+    var titles = this._index.titles;
+
+    var i, j, file;
+    var fileMap = {};
+    var scoreMap = {};
+    var results = [];
+
+    // perform the search on the required terms
+    for (i = 0; i < searchterms.length; i++) {
+      var word = searchterms[i];
+      var files = [];
+      var _o = [
+        {files: terms[word], score: Scorer.term},
+        {files: titleterms[word], score: Scorer.title}
+      ];
+      // add support for partial matches
+      if (word.length > 2) {
+        for (var w in terms) {
+          if (w.match(word) && !terms[word]) {
+            _o.push({files: terms[w], score: Scorer.partialTerm})
+          }
+        }
+        for (var w in titleterms) {
+          if (w.match(word) && !titleterms[word]) {
+              _o.push({files: titleterms[w], score: Scorer.partialTitle})
+          }
+        }
+      }
+
+      // no match but word was a required one
+      if ($u.every(_o, function(o){return o.files === undefined;})) {
+        break;
+      }
+      // found search word in contents
+      $u.each(_o, function(o) {
+        var _files = o.files;
+        if (_files === undefined)
+          return
+
+        if (_files.length === undefined)
+          _files = [_files];
+        files = files.concat(_files);
+
+        // set score for the word in each file to Scorer.term
+        for (j = 0; j < _files.length; j++) {
+          file = _files[j];
+          if (!(file in scoreMap))
+            scoreMap[file] = {}
+          scoreMap[file][word] = o.score;
+        }
+      });
+
+      // create the mapping
+      for (j = 0; j < files.length; j++) {
+        file = files[j];
+        if (file in fileMap)
+          fileMap[file].push(word);
+        else
+          fileMap[file] = [word];
+      }
+    }
+
+    // now check if the files don't contain excluded terms
+    for (file in fileMap) {
+      var valid = true;
+
+      // check if all requirements are matched
+      var filteredTermCount = // as search terms with length < 3 are discarded: ignore
+        searchterms.filter(function(term){return term.length > 2}).length
+      if (
+        fileMap[file].length != searchterms.length &&
+        fileMap[file].length != filteredTermCount
+      ) continue;
+
+      // ensure that none of the excluded terms is in the search result
+      for (i = 0; i < excluded.length; i++) {
+        if (terms[excluded[i]] == file ||
+            titleterms[excluded[i]] == file ||
+            $u.contains(terms[excluded[i]] || [], file) ||
+            $u.contains(titleterms[excluded[i]] || [], file)) {
+          valid = false;
+          break;
+        }
+      }
+
+      // if we have still a valid result we can add it to the result list
+      if (valid) {
+        // select one (max) score for the file.
+        // for better ranking, we should calculate ranking by using words statistics like basic tf-idf...
+        var score = $u.max($u.map(fileMap[file], function(w){return scoreMap[file][w]}));
+        results.push([docnames[file], titles[file], '', null, score, filenames[file]]);
+      }
+    }
+    return results;
+  },
+
+  /**
+   * helper function to return a node containing the
+   * search summary for a given text. keywords is a list
+   * of stemmed words, hlwords is the list of normal, unstemmed
+   * words. the first one is used to find the occurrence, the
+   * latter for highlighting it.
+   */
+  makeSearchSummary : function(htmlText, keywords, hlwords) {
+    var text = Search.htmlToText(htmlText);
+    var textLower = text.toLowerCase();
+    var start = 0;
+    $.each(keywords, function() {
+      var i = textLower.indexOf(this.toLowerCase());
+      if (i > -1)
+        start = i;
+    });
+    start = Math.max(start - 120, 0);
+    var excerpt = ((start > 0) ? '...' : '') +
+      $.trim(text.substr(start, 240)) +
+      ((start + 240 - text.length) ? '...' : '');
+    var rv = $('<div class="context"></div>').text(excerpt);
+    $.each(hlwords, function() {
+      rv = rv.highlightText(this, 'highlighted');
+    });
+    return rv;
+  }
+};
+
+$(document).ready(function() {
+  Search.init();
+});

content/docs/mesher/1.6.3/_static/underscore-1.3.1.js

diff --git a/content/docs/mesher/1.6.3/_static/underscore-1.3.1.js b/content/docs/mesher/1.6.3/_static/underscore-1.3.1.js
new file mode 100644
index 0000000..208d4cd
--- /dev/null
+++ b/content/docs/mesher/1.6.3/_static/underscore-1.3.1.js
@@ -0,0 +1,999 @@
+//     Underscore.js 1.3.1
+//     (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
+//     Underscore is freely distributable under the MIT license.
+//     Portions of Underscore are inspired or borrowed from Prototype,
+//     Oliver Steele's Functional, and John Resig's Micro-Templating.
+//     For all details and documentation:
+//     http://documentcloud.github.com/underscore
+
+(function() {
+
+  // Baseline setup
+  // --------------
+
+  // Establish the root object, `window` in the browser, or `global` on the server.
+  var root = this;
+
+  // Save the previous value of the `_` variable.
+  var previousUnderscore = root._;
+
+  // Establish the object that gets returned to break out of a loop iteration.
+  var breaker = {};
+
+  // Save bytes in the minified (but not gzipped) version:
+  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
+
+  // Create quick reference variables for speed access to core prototypes.
+  var slice            = ArrayProto.slice,
+      unshift          = ArrayProto.unshift,
+      toString         = ObjProto.toString,
+      hasOwnProperty   = ObjProto.hasOwnProperty;
+
+  // All **ECMAScript 5** native function implementations that we hope to use
+  // are declared here.
+  var
+    nativeForEach      = ArrayProto.forEach,
+    nativeMap          = ArrayProto.map,
+    nativeReduce       = ArrayProto.reduce,
+    nativeReduceRight  = ArrayProto.reduceRight,
+    nativeFilter       = ArrayProto.filter,
+    nativeEvery        = ArrayProto.every,
+    nativeSome         = ArrayProto.some,
+    nativeIndexOf      = ArrayProto.indexOf,
+    nativeLastIndexOf  = ArrayProto.lastIndexOf,
+    nativeIsArray      = Array.isArray,
+    nativeKeys         = Object.keys,
+    nativeBind         = FuncProto.bind;
+
+  // Create a safe reference to the Underscore object for use below.
+  var _ = function(obj) { return new wrapper(obj); };
+
+  // Export the Underscore object for **Node.js**, with
+  // backwards-compatibility for the old `require()` API. If we're in
+  // the browser, add `_` as a global object via a string identifier,
+  // for Closure Compiler "advanced" mode.
+  if (typeof exports !== 'undefined') {
+    if (typeof module !== 'undefined' && module.exports) {
+      exports = module.exports = _;
+    }
+    exports._ = _;
+  } else {
+    root['_'] = _;
+  }
+
+  // Current version.
+  _.VERSION = '1.3.1';
+
+  // Collection Functions
+  // --------------------
+
+  // The cornerstone, an `each` implementation, aka `forEach`.
+  // Handles objects with the built-in `forEach`, arrays, and raw objects.
+  // Delegates to **ECMAScript 5**'s native `forEach` if available.
+  var each = _.each = _.forEach = function(obj, iterator, context) {
+    if (obj == null) return;
+    if (nativeForEach && obj.forEach === nativeForEach) {
+      obj.forEach(iterator, context);
+    } else if (obj.length === +obj.length) {
+      for (var i = 0, l = obj.length; i < l; i++) {
+        if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return;
+      }
+    } else {
+      for (var key in obj) {
+        if (_.has(obj, key)) {
+          if (iterator.call(context, obj[key], key, obj) === breaker) return;
+        }
+      }
+    }
+  };
+
+  // Return the results of applying the iterator to each element.
+  // Delegates to **ECMAScript 5**'s native `map` if available.
+  _.map = _.collect = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
+    each(obj, function(value, index, list) {
+      results[results.length] = iterator.call(context, value, index, list);
+    });
+    if (obj.length === +obj.length) results.length = obj.length;
+    return results;
+  };
+
+  // **Reduce** builds up a single result from a list of values, aka `inject`,
+  // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
+  _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
+    var initial = arguments.length > 2;
+    if (obj == null) obj = [];
+    if (nativeReduce && obj.reduce === nativeReduce) {
+      if (context) iterator = _.bind(iterator, context);
+      return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
+    }
+    each(obj, function(value, index, list) {
+      if (!initial) {
+        memo = value;
+        initial = true;
+      } else {
+        memo = iterator.call(context, memo, value, index, list);
+      }
+    });
+    if (!initial) throw new TypeError('Reduce of empty array with no initial value');
+    return memo;
+  };
+
+  // The right-associative version of reduce, also known as `foldr`.
+  // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
+  _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
+    var initial = arguments.length > 2;
+    if (obj == null) obj = [];
+    if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
+      if (context) iterator = _.bind(iterator, context);
+      return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
+    }
+    var reversed = _.toArray(obj).reverse();
+    if (context && !initial) iterator = _.bind(iterator, context);
+    return initial ? _.reduce(reversed, iterator, memo, context) : _.reduce(reversed, iterator);
+  };
+
+  // Return the first value which passes a truth test. Aliased as `detect`.
+  _.find = _.detect = function(obj, iterator, context) {
+    var result;
+    any(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) {
+        result = value;
+        return true;
+      }
+    });
+    return result;
+  };
+
+  // Return all the elements that pass a truth test.
+  // Delegates to **ECMAScript 5**'s native `filter` if available.
+  // Aliased as `select`.
+  _.filter = _.select = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
+    each(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) results[results.length] = value;
+    });
+    return results;
+  };
+
+  // Return all the elements for which a truth test fails.
+  _.reject = function(obj, iterator, context) {
+    var results = [];
+    if (obj == null) return results;
+    each(obj, function(value, index, list) {
+      if (!iterator.call(context, value, index, list)) results[results.length] = value;
+    });
+    return results;
+  };
+
+  // Determine whether all of the elements match a truth test.
+  // Delegates to **ECMAScript 5**'s native `every` if available.
+  // Aliased as `all`.
+  _.every = _.all = function(obj, iterator, context) {
+    var result = true;
+    if (obj == null) return result;
+    if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
+    each(obj, function(value, index, list) {
+      if (!(result = result && iterator.call(context, value, index, list))) return breaker;
+    });
+    return result;
+  };
+
+  // Determine if at least one element in the object matches a truth test.
+  // Delegates to **ECMAScript 5**'s native `some` if available.
+  // Aliased as `any`.
+  var any = _.some = _.any = function(obj, iterator, context) {
+    iterator || (iterator = _.identity);
+    var result = false;
+    if (obj == null) return result;
+    if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
+    each(obj, function(value, index, list) {
+      if (result || (result = iterator.call(context, value, index, list))) return breaker;
+    });
+    return !!result;
+  };
+
+  // Determine if a given value is included in the array or object using `===`.
+  // Aliased as `contains`.
+  _.include = _.contains = function(obj, target) {
+    var found = false;
+    if (obj == null) return found;
+    if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
+    found = any(obj, function(value) {
+      return value === target;
+    });
+    return found;
+  };
+
+  // Invoke a method (with arguments) on every item in a collection.
+  _.invoke = function(obj, method) {
+    var args = slice.call(arguments, 2);
+    return _.map(obj, function(value) {
+      return (_.isFunction(method) ? method || value : value[method]).apply(value, args);
+    });
+  };
+
+  // Convenience version of a common use case of `map`: fetching a property.
+  _.pluck = function(obj, key) {
+    return _.map(obj, function(value){ return value[key]; });
+  };
+
+  // Return the maximum element or (element-based computation).
+  _.max = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
+    if (!iterator && _.isEmpty(obj)) return -Infinity;
+    var result = {computed : -Infinity};
+    each(obj, function(value, index, list) {
+      var computed = iterator ? iterator.call(context, value, index, list) : value;
+      computed >= result.computed && (result = {value : value, computed : computed});
+    });
+    return result.value;
+  };
+
+  // Return the minimum element (or element-based computation).
+  _.min = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
+    if (!iterator && _.isEmpty(obj)) return Infinity;
+    var result = {computed : Infinity};
+    each(obj, function(value, index, list) {
+      var computed = iterator ? iterator.call(context, value, index, list) : value;
+      computed < result.computed && (result = {value : value, computed : computed});
+    });
+    return result.value;
+  };
+
+  // Shuffle an array.
+  _.shuffle = function(obj) {
+    var shuffled = [], rand;
+    each(obj, function(value, index, list) {
+      if (index == 0) {
+        shuffled[0] = value;
+      } else {
+        rand = Math.floor(Math.random() * (index + 1));
+        shuffled[index] = shuffled[rand];
+        shuffled[rand] = value;
+      }
+    });
+    return shuffled;
+  };
+
+  // Sort the object's values by a criterion produced by an iterator.
+  _.sortBy = function(obj, iterator, context) {
+    return _.pluck(_.map(obj, function(value, index, list) {
+      return {
+        value : value,
+        criteria : iterator.call(context, value, index, list)
+      };
+    }).sort(function(left, right) {
+      var a = left.criteria, b = right.criteria;
+      return a < b ? -1 : a > b ? 1 : 0;
+    }), 'value');
+  };
+
+  // Groups the object's values by a criterion. Pass either a string attribute
+  // to group by, or a function that returns the criterion.
+  _.groupBy = function(obj, val) {
+    var result = {};
+    var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; };
+    each(obj, function(value, index) {
+      var key = iterator(value, index);
+      (result[key] || (result[key] = [])).push(value);
+    });
+    return result;
+  };
+
+  // Use a comparator function to figure out at what index an object should
+  // be inserted so as to maintain order. Uses binary search.
+  _.sortedIndex = function(array, obj, iterator) {
+    iterator || (iterator = _.identity);
+    var low = 0, high = array.length;
+    while (low < high) {
+      var mid = (low + high) >> 1;
+      iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid;
+    }
+    return low;
+  };
+
+  // Safely convert anything iterable into a real, live array.
+  _.toArray = function(iterable) {
+    if (!iterable)                return [];
+    if (iterable.toArray)         return iterable.toArray();
+    if (_.isArray(iterable))      return slice.call(iterable);
+    if (_.isArguments(iterable))  return slice.call(iterable);
+    return _.values(iterable);
+  };
+
+  // Return the number of elements in an object.
+  _.size = function(obj) {
+    return _.toArray(obj).length;
+  };
+
+  // Array Functions
+  // ---------------
+
+  // Get the first element of an array. Passing **n** will return the first N
+  // values in the array. Aliased as `head`. The **guard** check allows it to work
+  // with `_.map`.
+  _.first = _.head = function(array, n, guard) {
+    return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
+  };
+
+  // Returns everything but the last entry of the array. Especcialy useful on
+  // the arguments object. Passing **n** will return all the values in
+  // the array, excluding the last N. The **guard** check allows it to work with
+  // `_.map`.
+  _.initial = function(array, n, guard) {
+    return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
+  };
+
+  // Get the last element of an array. Passing **n** will return the last N
+  // values in the array. The **guard** check allows it to work with `_.map`.
+  _.last = function(array, n, guard) {
+    if ((n != null) && !guard) {
+      return slice.call(array, Math.max(array.length - n, 0));
+    } else {
+      return array[array.length - 1];
+    }
+  };
+
+  // Returns everything but the first entry of the array. Aliased as `tail`.
+  // Especially useful on the arguments object. Passing an **index** will return
+  // the rest of the values in the array from that index onward. The **guard**
+  // check allows it to work with `_.map`.
+  _.rest = _.tail = function(array, index, guard) {
+    return slice.call(array, (index == null) || guard ? 1 : index);
+  };
+
+  // Trim out all falsy values from an array.
+  _.compact = function(array) {
+    return _.filter(array, function(value){ return !!value; });
+  };
+
+  // Return a completely flattened version of an array.
+  _.flatten = function(array, shallow) {
+    return _.reduce(array, function(memo, value) {
+      if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value));
+      memo[memo.length] = value;
+      return memo;
+    }, []);
+  };
+
+  // Return a version of the array that does not contain the specified value(s).
+  _.without = function(array) {
+    return _.difference(array, slice.call(arguments, 1));
+  };
+
+  // Produce a duplicate-free version of the array. If the array has already
+  // been sorted, you have the option of using a faster algorithm.
+  // Aliased as `unique`.
+  _.uniq = _.unique = function(array, isSorted, iterator) {
+    var initial = iterator ? _.map(array, iterator) : array;
+    var result = [];
+    _.reduce(initial, function(memo, el, i) {
+      if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) {
+        memo[memo.length] = el;
+        result[result.length] = array[i];
+      }
+      return memo;
+    }, []);
+    return result;
+  };
+
+  // Produce an array that contains the union: each distinct element from all of
+  // the passed-in arrays.
+  _.union = function() {
+    return _.uniq(_.flatten(arguments, true));
+  };
+
+  // Produce an array that contains every item shared between all the
+  // passed-in arrays. (Aliased as "intersect" for back-compat.)
+  _.intersection = _.intersect = function(array) {
+    var rest = slice.call(arguments, 1);
+    return _.filter(_.uniq(array), function(item) {
+      return _.every(rest, function(other) {
+        return _.indexOf(other, item) >= 0;
+      });
+    });
+  };
+
+  // Take the difference between one array and a number of other arrays.
+  // Only the elements present in just the first array will remain.
+  _.difference = function(array) {
+    var rest = _.flatten(slice.call(arguments, 1));
+    return _.filter(array, function(value){ return !_.include(rest, value); });
+  };
+
+  // Zip together multiple lists into a single array -- elements that share
+  // an index go together.
+  _.zip = function() {
+    var args = slice.call(arguments);
+    var length = _.max(_.pluck(args, 'length'));
+    var results = new Array(length);
+    for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
+    return results;
+  };
+
+  // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
+  // we need this function. Return the position of the first occurrence of an
+  // item in an array, or -1 if the item is not included in the array.
+  // Delegates to **ECMAScript 5**'s native `indexOf` if available.
+  // If the array is large and already in sort order, pass `true`
+  // for **isSorted** to use binary search.
+  _.indexOf = function(array, item, isSorted) {
+    if (array == null) return -1;
+    var i, l;
+    if (isSorted) {
+      i = _.sortedIndex(array, item);
+      return array[i] === item ? i : -1;
+    }
+    if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
+    for (i = 0, l = array.length; i < l; i++) if (i in array && array[i] === item) return i;
+    return -1;
+  };
+
+  // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
+  _.lastIndexOf = function(array, item) {
+    if (array == null) return -1;
+    if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
+    var i = array.length;
+    while (i--) if (i in array && array[i] === item) return i;
+    return -1;
+  };
+
+  // Generate an integer Array containing an arithmetic progression. A port of
+  // the native Python `range()` function. See
+  // [the Python documentation](http://docs.python.org/library/functions.html#range).
+  _.range = function(start, stop, step) {
+    if (arguments.length <= 1) {
+      stop = start || 0;
+      start = 0;
+    }
+    step = arguments[2] || 1;
+
+    var len = Math.max(Math.ceil((stop - start) / step), 0);
+    var idx = 0;
+    var range = new Array(len);
+
+    while(idx < len) {
+      range[idx++] = start;
+      start += step;
+    }
+
+    return range;
+  };
+
+  // Function (ahem) Functions
+  // ------------------
+
+  // Reusable constructor function for prototype setting.
+  var ctor = function(){};
+
+  // Create a function bound to a given object (assigning `this`, and arguments,
+  // optionally). Binding with arguments is also known as `curry`.
+  // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
+  // We check for `func.bind` first, to fail fast when `func` is undefined.
+  _.bind = function bind(func, context) {
+    var bound, args;
+    if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
+    if (!_.isFunction(func)) throw new TypeError;
+    args = slice.call(arguments, 2);
+    return bound = function() {
+      if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
+      ctor.prototype = func.prototype;
+      var self = new ctor;
+      var result = func.apply(self, args.concat(slice.call(arguments)));
+      if (Object(result) === result) return result;
+      return self;
+    };
+  };
+
+  // Bind all of an object's methods to that object. Useful for ensuring that
+  // all callbacks defined on an object belong to it.
+  _.bindAll = function(obj) {
+    var funcs = slice.call(arguments, 1);
+    if (funcs.length == 0) funcs = _.functions(obj);
+    each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
+    return obj;
+  };
+
+  // Memoize an expensive function by storing its results.
+  _.memoize = function(func, hasher) {
+    var memo = {};
+    hasher || (hasher = _.identity);
+    return function() {
+      var key = hasher.apply(this, arguments);
+      return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
+    };
+  };
+
+  // Delays a function for the given number of milliseconds, and then calls
+  // it with the arguments supplied.
+  _.delay = function(func, wait) {
+    var args = slice.call(arguments, 2);
+    return setTimeout(function(){ return func.apply(func, args); }, wait);
+  };
+
+  // Defers a function, scheduling it to run after the current call stack has
+  // cleared.
+  _.defer = function(func) {
+    return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
+  };
+
+  // Returns a function, that, when invoked, will only be triggered at most once
+  // during a given window of time.
+  _.throttle = function(func, wait) {
+    var context, args, timeout, throttling, more;
+    var whenDone = _.debounce(function(){ more = throttling = false; }, wait);
+    return function() {
+      context = this; args = arguments;
+      var later = function() {
+        timeout = null;
+        if (more) func.apply(context, args);
+        whenDone();
+      };
+      if (!timeout) timeout = setTimeout(later, wait);
+      if (throttling) {
+        more = true;
+      } else {
+        func.apply(context, args);
+      }
+      whenDone();
+      throttling = true;
+    };
+  };
+
+  // Returns a function, that, as long as it continues to be invoked, will not
+  // be triggered. The function will be called after it stops being called for
+  // N milliseconds.
+  _.debounce = function(func, wait) {
+    var timeout;
+    return function() {
+      var context = this, args = arguments;
+      var later = function() {
+        timeout = null;
+        func.apply(context, args);
+      };
+      clearTimeout(timeout);
+      timeout = setTimeout(later, wait);
+    };
+  };
+
+  // Returns a function that will be executed at most one time, no matter how
+  // often you call it. Useful for lazy initialization.
+  _.once = function(func) {
+    var ran = false, memo;
+    return function() {
+      if (ran) return memo;
+      ran = true;
+      return memo = func.apply(this, arguments);
+    };
+  };
+
+  // Returns the first function passed as an argument to the second,
+  // allowing you to adjust arguments, run code before and after, and
+  // conditionally execute the original function.
+  _.wrap = function(func, wrapper) {
+    return function() {
+      var args = [func].concat(slice.call(arguments, 0));
+      return wrapper.apply(this, args);
+    };
+  };
+
+  // Returns a function that is the composition of a list of functions, each
+  // consuming the return value of the function that follows.
+  _.compose = function() {
+    var funcs = arguments;
+    return function() {
+      var args = arguments;
+      for (var i = funcs.length - 1; i >= 0; i--) {
+        args = [funcs[i].apply(this, args)];
+      }
+      return args[0];
+    };
+  };
+
+  // Returns a function that will only be executed after being called N times.
+  _.after = function(times, func) {
+    if (times <= 0) return func();
+    return function() {
+      if (--times < 1) { return func.apply(this, arguments); }
+    };
+  };
+
+  // Object Functions
+  // ----------------
+
+  // Retrieve the names of an object's properties.
+  // Delegates to **ECMAScript 5**'s native `Object.keys`
+  _.keys = nativeKeys || function(obj) {
+    if (obj !== Object(obj)) throw new TypeError('Invalid object');
+    var keys = [];
+    for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key;
+    return keys;
+  };
+
+  // Retrieve the values of an object's properties.
+  _.values = function(obj) {
+    return _.map(obj, _.identity);
+  };
+
+  // Return a sorted list of the function names available on the object.
+  // Aliased as `methods`
+  _.functions = _.methods = function(obj) {
+    var names = [];
+    for (var key in obj) {
+      if (_.isFunction(obj[key])) names.push(key);
+    }
+    return names.sort();
+  };
+
+  // Extend a given object with all the properties in passed-in object(s).
+  _.extend = function(obj) {
+    each(slice.call(arguments, 1), function(source) {
+      for (var prop in source) {
+        obj[prop] = source[prop];
+      }
+    });
+    return obj;
+  };
+
+  // Fill in a given object with default properties.
+  _.defaults = function(obj) {
+    each(slice.call(arguments, 1), function(source) {
+      for (var prop in source) {
+        if (obj[prop] == null) obj[prop] = source[prop];
+      }
+    });
+    return obj;
+  };
+
+  // Create a (shallow-cloned) duplicate of an object.
+  _.clone = function(obj) {
+    if (!_.isObject(obj)) return obj;
+    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
+  };
+
+  // Invokes interceptor with the obj, and then returns obj.
+  // The primary purpose of this method is to "tap into" a method chain, in
+  // order to perform operations on intermediate results within the chain.
+  _.tap = function(obj, interceptor) {
+    interceptor(obj);
+    return obj;
+  };
+
+  // Internal recursive comparison function.
+  function eq(a, b, stack) {
+    // Identical objects are equal. `0 === -0`, but they aren't identical.
+    // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal.
+    if (a === b) return a !== 0 || 1 / a == 1 / b;
+    // A strict comparison is necessary because `null == undefined`.
+    if (a == null || b == null) return a === b;
+    // Unwrap any wrapped objects.
+    if (a._chain) a = a._wrapped;
+    if (b._chain) b = b._wrapped;
+    // Invoke a custom `isEqual` method if one is provided.
+    if (a.isEqual && _.isFunction(a.isEqual)) return a.isEqual(b);
+    if (b.isEqual && _.isFunction(b.isEqual)) return b.isEqual(a);
+    // Compare `[[Class]]` names.
+    var className = toString.call(a);
+    if (className != toString.call(b)) return false;
+    switch (className) {
+      // Strings, numbers, dates, and booleans are compared by value.
+      case '[object String]':
+        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
+        // equivalent to `new String("5")`.
+        return a == String(b);
+      case '[object Number]':
+        // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
+        // other numeric values.
+        return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
+      case '[object Date]':
+      case '[object Boolean]':
+        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
+        // millisecond representations. Note that invalid dates with millisecond representations
+        // of `NaN` are not equivalent.
+        return +a == +b;
+      // RegExps are compared by their source patterns and flags.
+      case '[object RegExp]':
+        return a.source == b.source &&
+               a.global == b.global &&
+               a.multiline == b.multiline &&
+               a.ignoreCase == b.ignoreCase;
+    }
+    if (typeof a != 'object' || typeof b != 'object') return false;
+    // Assume equality for cyclic structures. The algorithm for detecting cyclic
+    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
+    var length = stack.length;
+    while (length--) {
+      // Linear search. Performance is inversely proportional to the number of
+      // unique nested structures.
+      if (stack[length] == a) return true;
+    }
+    // Add the first object to the stack of traversed objects.
+    stack.push(a);
+    var size = 0, result = true;
+    // Recursively compare objects and arrays.
+    if (className == '[object Array]') {
+      // Compare array lengths to determine if a deep comparison is necessary.
+      size = a.length;
+      result = size == b.length;
+      if (result) {
+        // Deep compare the contents, ignoring non-numeric properties.
+        while (size--) {
+          // Ensure commutative equality for sparse arrays.
+          if (!(result = size in a == size in b && eq(a[size], b[size], stack))) break;
+        }
+      }
+    } else {
+      // Objects with different constructors are not equivalent.
+      if ('constructor' in a != 'constructor' in b || a.constructor != b.constructor) return false;
+      // Deep compare objects.
+      for (var key in a) {
+        if (_.has(a, key)) {
+          // Count the expected number of properties.
+          size++;
+          // Deep compare each member.
+          if (!(result = _.has(b, key) && eq(a[key], b[key], stack))) break;
+        }
+      }
+      // Ensure that both objects contain the same number of properties.
+      if (result) {
+        for (key in b) {
+          if (_.has(b, key) && !(size--)) break;
+        }
+        result = !size;
+      }
+    }
+    // Remove the first object from the stack of traversed objects.
+    stack.pop();
+    return result;
+  }
+
+  // Perform a deep comparison to check if two objects are equal.
+  _.isEqual = function(a, b) {
+    return eq(a, b, []);
+  };
+
+  // Is a given array, string, or object empty?
+  // An "empty" object has no enumerable own-properties.
+  _.isEmpty = function(obj) {
+    if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
+    for (var key in obj) if (_.has(obj, key)) return false;
+    return true;
+  };
+
+  // Is a given value a DOM element?
+  _.isElement = function(obj) {
+    return !!(obj && obj.nodeType == 1);
+  };
+
+  // Is a given value an array?
+  // Delegates to ECMA5's native Array.isArray
+  _.isArray = nativeIsArray || function(obj) {
+    return toString.call(obj) == '[object Array]';
+  };
+
+  // Is a given variable an object?
+  _.isObject = function(obj) {
+    return obj === Object(obj);
+  };
+
+  // Is a given variable an arguments object?
+  _.isArguments = function(obj) {
+    return toString.call(obj) == '[object Arguments]';
+  };
+  if (!_.isArguments(arguments)) {
+    _.isArguments = function(obj) {
+      return !!(obj && _.has(obj, 'callee'));
+    };
+  }
+
+  // Is a given value a function?
+  _.isFunction = function(obj) {
+    return toString.call(obj) == '[object Function]';
+  };
+
+  // Is a given value a string?
+  _.isString = function(obj) {
+    return toString.call(obj) == '[object String]';
+  };
+
+  // Is a given value a number?
+  _.isNumber = function(obj) {
+    return toString.call(obj) == '[object Number]';
+  };
+
+  // Is the given value `NaN`?
+  _.isNaN = function(obj) {
+    // `NaN` is the only value for which `===` is not reflexive.
+    return obj !== obj;
+  };
+
+  // Is a given value a boolean?
+  _.isBoolean = function(obj) {
+    return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
+  };
+
+  // Is a given value a date?
+  _.isDate = function(obj) {
+    return toString.call(obj) == '[object Date]';
+  };
+
+  // Is the given value a regular expression?
+  _.isRegExp = function(obj) {
+    return toString.call(obj) == '[object RegExp]';
+  };
+
+  // Is a given value equal to null?
+  _.isNull = function(obj) {
+    return obj === null;
+  };
+
+  // Is a given variable undefined?
+  _.isUndefined = function(obj) {
+    return obj === void 0;
+  };
+
+  // Has own property?
+  _.has = function(obj, key) {
+    return hasOwnProperty.call(obj, key);
+  };
+
+  // Utility Functions
+  // -----------------
+
+  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
+  // previous owner. Returns a reference to the Underscore object.
+  _.noConflict = function() {
+    root._ = previousUnderscore;
+    return this;
+  };
+
+  // Keep the identity function around for default iterators.
+  _.identity = function(value) {
+    return value;
+  };
+
+  // Run a function **n** times.
+  _.times = function (n, iterator, context) {
+    for (var i = 0; i < n; i++) iterator.call(context, i);
+  };
+
+  // Escape a string for HTML interpolation.
+  _.escape = function(string) {
+    return (''+string).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;').replace(/'/g, '&#x27;').replace(/\//g,'&#x2F;');
+  };
+
+  // Add your own custom functions to the Underscore object, ensuring that
+  // they're correctly added to the OOP wrapper as well.
+  _.mixin = function(obj) {
+    each(_.functions(obj), function(name){
+      addToWrapper(name, _[name] = obj[name]);
+    });
+  };
+
+  // Generate a unique integer id (unique within the entire client session).
+  // Useful for temporary DOM ids.
+  var idCounter = 0;
+  _.uniqueId = function(prefix) {
+    var id = idCounter++;
+    return prefix ? prefix + id : id;
+  };
+
+  // By default, Underscore uses ERB-style template delimiters, change the
+  // following template settings to use alternative delimiters.
+  _.templateSettings = {
+    evaluate    : /<%([\s\S]+?)%>/g,
+    interpolate : /<%=([\s\S]+?)%>/g,
+    escape      : /<%-([\s\S]+?)%>/g
+  };
+
+  // When customizing `templateSettings`, if you don't want to define an
+  // interpolation, evaluation or escaping regex, we need one that is
+  // guaranteed not to match.
+  var noMatch = /.^/;
+
+  // Within an interpolation, evaluation, or escaping, remove HTML escaping
+  // that had been previously added.
+  var unescape = function(code) {
+    return code.replace(/\\\\/g, '\\').replace(/\\'/g, "'");
+  };
+
+  // JavaScript micro-templating, similar to John Resig's implementation.
+  // Underscore templating handles arbitrary delimiters, preserves whitespace,
+  // and correctly escapes quotes within interpolated code.
+  _.template = function(str, data) {
+    var c  = _.templateSettings;
+    var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
+      'with(obj||{}){__p.push(\'' +
+      str.replace(/\\/g, '\\\\')
+         .replace(/'/g, "\\'")
+         .replace(c.escape || noMatch, function(match, code) {
+           return "',_.escape(" + unescape(code) + "),'";
+         })
+         .replace(c.interpolate || noMatch, function(match, code) {
+           return "'," + unescape(code) + ",'";
+         })
+         .replace(c.evaluate || noMatch, function(match, code) {
+           return "');" + unescape(code).replace(/[\r\n\t]/g, ' ') + ";__p.push('";
+         })
+         .replace(/\r/g, '\\r')
+         .replace(/\n/g, '\\n')
+         .replace(/\t/g, '\\t')
+         + "');}return __p.join('');";
+    var func = new Function('obj', '_', tmpl);
+    if (data) return func(data, _);
+    return function(data) {
+      return func.call(this, data, _);
+    };
+  };
+
+  // Add a "chain" function, which will delegate to the wrapper.
+  _.chain = function(obj) {
+    return _(obj).chain();
+  };
+
+  // The OOP Wrapper
+  // ---------------
+
+  // If Underscore is called as a function, it returns a wrapped object that
+  // can be used OO-style. This wrapper holds altered versions of all the
+  // underscore functions. Wrapped objects may be chained.
+  var wrapper = function(obj) { this._wrapped = obj; };
+
+  // Expose `wrapper.prototype` as `_.prototype`
+  _.prototype = wrapper.prototype;
+
+  // Helper function to continue chaining intermediate results.
+  var result = function(obj, chain) {
+    return chain ? _(obj).chain() : obj;
+  };
+
+  // A method to easily add functions to the OOP wrapper.
+  var addToWrapper = function(name, func) {
+    wrapper.prototype[name] = function() {
+      var args = slice.call(arguments);
+      unshift.call(args, this._wrapped);
+      return result(func.apply(_, args), this._chain);
+    };
+  };
+
+  // Add all of the Underscore functions to the wrapper object.
+  _.mixin(_);
+
+  // Add all mutator Array functions to the wrapper.
+  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+    var method = ArrayProto[name];
+    wrapper.prototype[name] = function() {
+      var wrapped = this._wrapped;
+      method.apply(wrapped, arguments);
+      var length = wrapped.length;
+      if ((name == 'shift' || name == 'splice') && length === 0) delete wrapped[0];
+      return result(wrapped, this._chain);
+    };
+  });
+
+  // Add all accessor Array functions to the wrapper.
+  each(['concat', 'join', 'slice'], function(name) {
+    var method = ArrayProto[name];
+    wrapper.prototype[name] = function() {
+      return result(method.apply(this._wrapped, arguments), this._chain);
+    };
+  });
+
+  // Start chaining a wrapped Underscore object.
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content/docs/mesher/1.6.3/_static/underscore.js

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content/docs/mesher/1.6.3/configuration.html

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+<li class="toctree-l2"><a class="reference internal" href="configurations/health.html#options">Options</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="configurations/destination_resolver.html">Destination Resolver</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="configurations/destination_resolver.html#configurations">Configurations</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="configurations/edge.html">API gateway</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="configurations/edge.html#options">Options</a></li>
+<li class="toctree-l2"><a class="reference internal" href="configurations/edge.html#example">example</a></li>
+<li class="toctree-l2"><a class="reference internal" href="configurations/edge.html#enable-tls">Enable TLS</a></li>
+</ul>
+</li>
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content/docs/mesher/1.6.3/configurations/admin.html

diff --git a/content/docs/mesher/1.6.3/configurations/admin.html b/content/docs/mesher/1.6.3/configurations/admin.html
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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+<li class="toctree-l1 current"><a class="reference internal" href="../configuration.html">User guides</a><ul class="current">
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+<li class="toctree-l2"><a class="reference internal" href="profiling.html">Profile Mesher</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Admin API</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#configurations">Configurations</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="health.html">Local Health check</a></li>
+<li class="toctree-l2"><a class="reference internal" href="destination_resolver.html">Destination Resolver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="edge.html">API gateway</a></li>
+</ul>
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+<li class="toctree-l1"><a class="reference internal" href="../development.html">Development guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../protocols.html">Protocols</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../istio-guides.html">Use Istio as control plane</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../sidecar.html">Sidcar-injector Deployment and Usage</a></li>
+</ul>
+
+            
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+
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+    
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+        
+      <li>Admin API</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
+        
+            
+            <a href="../_sources/configurations/admin.md.txt" rel="nofollow"> View page source</a>
+          
+        
+      </li>
+    
+  </ul>
+
+  
+  <hr/>
+</div>
+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="admin-api">
+<h1>Admin API<a class="headerlink" href="#admin-api" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="configurations">
+<h2>Configurations<a class="headerlink" href="#configurations" title="Permalink to this headline">¶</a></h2>
+<p>admin api server leverage protocol server, it listens on isolated port, by default admin is enabled, and default value of goRuntimeMetrics is false.</p>
+<p>To start api server, set protocol server config in chassis.yaml</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">cse</span><span class="p">:</span>
+   <span class="nt">protocols</span><span class="p">:</span>
+     <span class="nt">rest-admin</span><span class="p">:</span>
+       <span class="nt">listenAddress</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">0.0.0.0:30102</span>  <span class="c1"># listen addr for adminAPI</span>
+</pre></div>
+</div>
+<p>tune admin api in mesher.yaml</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">admin</span><span class="p">:</span> 
+  <span class="nt">enable</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+</pre></div>
+</div>
+<p><strong>admin.enable</strong></p>
+<blockquote>
+<div><p><em>(optional, bool)</em> default is false</p>
+</div></blockquote>
+</div>
+</div>
+
+
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content/docs/mesher/1.6.3/configurations/cli.html

diff --git a/content/docs/mesher/1.6.3/configurations/cli.html b/content/docs/mesher/1.6.3/configurations/cli.html
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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+  <meta charset="utf-8">
+  
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  
+  <title>Mesher command Line &mdash; go-chassis  documentation</title>
+  
+
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+  
+  
+
+  
+  <script type="text/javascript" src="../_static/js/modernizr.min.js"></script>
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+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="../configuration.html">User guides</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Mesher command Line</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#options">Options</a></li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="profiling.html">Profile Mesher</a></li>
+<li class="toctree-l2"><a class="reference internal" href="admin.html">Admin API</a></li>
+<li class="toctree-l2"><a class="reference internal" href="health.html">Local Health check</a></li>
+<li class="toctree-l2"><a class="reference internal" href="destination_resolver.html">Destination Resolver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="edge.html">API gateway</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../development.html">Development guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../protocols.html">Protocols</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../istio-guides.html">Use Istio as control plane</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../sidecar.html">Sidcar-injector Deployment and Usage</a></li>
+</ul>
+
+            
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+        
+      <li>Mesher command Line</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
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+            <a href="../_sources/configurations/cli.md.txt" rel="nofollow"> View page source</a>
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+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="mesher-command-line">
+<h1>Mesher command Line<a class="headerlink" href="#mesher-command-line" title="Permalink to this headline">¶</a></h1>
+<p>when you start mesher process, you can use mesher command line to specify configurations like below</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>mesher --config<span class="o">=</span>mesher.yaml --service-ports<span class="o">=</span>rest:8080
+</pre></div>
+</div>
+<div class="section" id="options">
+<h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
+<p><strong>–config</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> the path to mesher configuration file, default value is {current_bin_work_dir}/conf/mesher.yaml</p>
+</div></blockquote>
+<p><strong>–mode</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> mesher has 2 work mode, sidecar and edge, default is sidecar</p>
+</div></blockquote>
+<p><strong>–service-ports</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> running as sidecar, mesher need to know local service ports,
+this is to tell mesher service port list,
+The value format is {protocol}-{suffix} or {protocol}
+if service has multiple protocol, you can separate with comma “rest-admin:8080,grpc:9000”.
+default is empty, in that case mesher will use header X-Forwarded-Port as local service port,
+if it is empty also mesher can not communicate to your local service</p>
+</div></blockquote>
+</div>
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content/docs/mesher/1.6.3/configurations/destination_resolver.html

diff --git a/content/docs/mesher/1.6.3/configurations/destination_resolver.html b/content/docs/mesher/1.6.3/configurations/destination_resolver.html
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--- /dev/null
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@@ -0,0 +1,235 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+            
+  <div class="section" id="destination-resolver">
+<h1>Destination Resolver<a class="headerlink" href="#destination-resolver" title="Permalink to this headline">¶</a></h1>
+<p>Destination Resolver is a module to parse each protocol request to get a target service name.
+you can write your own resolver implementation for different protocol.</p>
+<div class="section" id="configurations">
+<h2>Configurations<a class="headerlink" href="#configurations" title="Permalink to this headline">¶</a></h2>
+<p>example</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">plugin</span><span class="p">:</span>
+  <span class="nt">destinationResolver</span><span class="p">:</span>
+    <span class="nt">http</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">host</span> <span class="c1"># host is a build-in and default resolver, it uses host name as service name</span>
+    <span class="nt">grpc</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ip</span>
+</pre></div>
+</div>
+<p><strong>plugin.destinationResolver</strong></p>
+<blockquote>
+<div><p><em>(optional, map)</em> here you can define what kind of resolver, a protocol should use</p>
+</div></blockquote>
+</div>
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+<li class="toctree-l3"><a class="reference internal" href="#example">example</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#enable-tls">Enable TLS</a></li>
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+            
+  <div class="section" id="api-gateway">
+<h1>API gateway<a class="headerlink" href="#api-gateway" title="Permalink to this headline">¶</a></h1>
+<p>mesher is able to work as a API gateway to mange traffic,to run mesher as an API gateway</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span>mesher --config<span class="o">=</span>mesher.yaml --mode edge
+</pre></div>
+</div>
+<p>the ingress rule is in mesher.yaml</p>
+<div class="section" id="options">
+<h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
+<p><strong>mesher.ingress.type</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> default is servicecomb, it reads servicecomb ingress rule.
+it is a plugin, you can custom your own implementation</p>
+</div></blockquote>
+<p><strong>mesher.ingress.rule.http</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> rule about how to forward http traffic. it holds a yaml content as rule.</p>
+</div></blockquote>
+<p>below explain the content, the rule list is like a filter, all the request will go through this rule list until match one rule.</p>
+<p><strong>apiPath</strong></p>
+<blockquote>
+<div><p><em>(required, string)</em> if request’s url match this, it will use this rule</p>
+</div></blockquote>
+<p><strong>host</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> if request HOST match this, mesher will use this rule, it can be empty,
+if you set both host and apiPath, the request’s host and api path must match them at the same time</p>
+</div></blockquote>
+<p><strong>service.name</strong></p>
+<blockquote>
+<div><p><em>(required, string)</em> target backend service name in registry service(like ServiceComb service center)</p>
+</div></blockquote>
+<p><strong>service.redirectPath</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> by default, mesher use original request’s url</p>
+</div></blockquote>
+<p><strong>service.port.value</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> if you use java chassis or go chassis to develop backend service, no need to set it.
+but if your backend service use mesher-sidecar, you must give your service port here.</p>
+</div></blockquote>
+</div>
+<div class="section" id="example">
+<h2>example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">mesher</span><span class="p">:</span>
+  <span class="nt">ingress</span><span class="p">:</span>
+    <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">servicecomb</span>
+    <span class="nt">rule</span><span class="p">:</span>
+      <span class="nt">http</span><span class="p">:</span> <span class="p p-Indicator">|</span>
+        <span class="no">- host: example.com</span>
+          <span class="no">apiPath: /some/api</span>
+          <span class="no">service:</span>
+            <span class="no">name: example</span>
+            <span class="no">redirectPath: /another/api</span>
+            <span class="no">port:</span>
+              <span class="no">name: http-legacy</span>
+              <span class="no">value: 8080</span>
+        <span class="no">- apiPath: /some/api</span>
+          <span class="no">service:</span>
+            <span class="no">name: Server</span>
+            <span class="no">port:</span>
+              <span class="no">name: http</span>
+              <span class="no">value: 8080</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="enable-tls">
+<h2>Enable TLS<a class="headerlink" href="#enable-tls" title="Permalink to this headline">¶</a></h2>
+<p>generate private key</p>
+<div class="highlight-sh notranslate"><div class="highlight"><pre><span></span>openssl genrsa -out server.key <span class="m">2048</span>
+</pre></div>
+</div>
+<p>sign cert with private key</p>
+<div class="highlight-shell script notranslate"><div class="highlight"><pre><span></span>openssl req -new -x509 -key server.key -out server.crt -days 3650
+</pre></div>
+</div>
+<p>set file path in chassis.yaml</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">ssl</span><span class="p">:</span>
+  <span class="nt">mesher-edge.rest.Provider.certFile</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">server.crt</span>
+  <span class="nt">mesher-edge.rest.Provider.keyFile</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">server.key</span>
+</pre></div>
+</div>
+<p>To know advanced feature about TLS configuration, check
+https://docs.go-chassis.com/user-guides/tls.html</p>
+</div>
+</div>
+
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+  <ul class="wy-breadcrumbs">
+    
+      <li><a href="../index.html">Docs</a> &raquo;</li>
+        
+          <li><a href="../configuration.html">User guides</a> &raquo;</li>
+        
+      <li>Local Health check</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
+        
+            
+            <a href="../_sources/configurations/health.md.txt" rel="nofollow"> View page source</a>
+          
+        
+      </li>
+    
+  </ul>
+
+  
+  <hr/>
+</div>
+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="local-health-check">
+<h1>Local Health check<a class="headerlink" href="#local-health-check" title="Permalink to this headline">¶</a></h1>
+<p>you can use health checker to check local service health,
+when service instance is not healthy, mesher will update the instance status in registry service to “DOWN”
+so that other service
+can not discover this instance. If the service is healthy again, mesher will update status to “UP”,
+then other instance can discover it again.
+currently this function works only when you use service center as registry</p>
+<p>examples:</p>
+<p>Check local http service</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">localHealthCheck</span><span class="p">:</span>
+  <span class="p p-Indicator">-</span> <span class="nt">port</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">8080</span>
+    <span class="nt">protocol</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">rest</span>
+    <span class="nt">uri</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/health</span>
+    <span class="nt">interval</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">30s</span>
+    <span class="nt">match</span><span class="p">:</span>
+      <span class="nt">status</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">200</span>
+      <span class="nt">body</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ok</span>
+</pre></div>
+</div>
+<div class="section" id="options">
+<h2>Options<a class="headerlink" href="#options" title="Permalink to this headline">¶</a></h2>
+<p><strong>port</strong></p>
+<blockquote>
+<div><p><em>(require, string)</em> must be a port number, mesher is only responsible to check local service,
+it use 127.0.0.1:{port} to check service</p>
+</div></blockquote>
+<p><strong>protocol</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> mesher has a built-in checker “rest”,for other protocol,
+will use default TCP checker unless you implement your own checker</p>
+</div></blockquote>
+<p><strong>uri</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> uri start with /.</p>
+</div></blockquote>
+<p><strong>interval</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> check interval, you can use number with unit: 1m, 10s.</p>
+</div></blockquote>
+<p><strong>match.status</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> the http response status must match status code</p>
+</div></blockquote>
+<p><strong>match.body</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> the http response body must match body</p>
+</div></blockquote>
+</div>
+</div>
+
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content/docs/mesher/1.6.3/configurations/profiling.html

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+
+
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+<li class="toctree-l2 current"><a class="current reference internal" href="#">Profile Mesher</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#configurations">Configurations</a></li>
+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="health.html">Local Health check</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="edge.html">API gateway</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="../protocols.html">Protocols</a></li>
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+        
+      <li>Profile Mesher</li>
+    
+    
+      <li class="wy-breadcrumbs-aside">
+        
+            
+            <a href="../_sources/configurations/profiling.md.txt" rel="nofollow"> View page source</a>
+          
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+  </ul>
+
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+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="profile-mesher">
+<h1>Profile Mesher<a class="headerlink" href="#profile-mesher" title="Permalink to this headline">¶</a></h1>
+<p>Mesher has a convenience way to enable go pprof, so that you can easily analyze the performance of mesher</p>
+<div class="section" id="configurations">
+<h2>Configurations<a class="headerlink" href="#configurations" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">pprof</span><span class="p">:</span>
+  <span class="nt">enable</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+  <span class="nt">listen</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">127.0.0.0.1:6060</span>
+</pre></div>
+</div>
+<p><strong>enable</strong></p>
+<blockquote>
+<div><p><em>(optional, bool)</em> default is false</p>
+</div></blockquote>
+<p><strong>listen</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> Listen IP and port</p>
+</div></blockquote>
+</div>
+</div>
+
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content/docs/mesher/1.6.3/development.html

diff --git a/content/docs/mesher/1.6.3/development.html b/content/docs/mesher/1.6.3/development.html
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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+            
+  <div class="section" id="development-guides">
+<h1>Development guides<a class="headerlink" href="#development-guides" title="Permalink to this headline">¶</a></h1>
+<p>mesher is an out of box service mesh and API gateway component,
+you can use them by simply setting configuration files.
+But some of user still need to customize a service mesh or API gateway.
+For example:</p>
+<ul class="simple">
+<li><p>API gateway need to query account system and do the authentication and authorization.</p></li>
+<li><p>mesher need to access cloud provider API</p></li>
+<li><p>mesher use customized control panel</p></li>
+<li><p>mesher use customized config server</p></li>
+</ul>
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+<li class="toctree-l3"><a class="reference internal" href="development/cloud-provider.html#access-servicecomb-engine-api">Access ServiceComb Engine API</a></li>
+<li class="toctree-l3"><a class="reference internal" href="development/cloud-provider.html#use-config-center-to-manage-configuration">Use Config Center to manage configuration</a></li>
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content/docs/mesher/1.6.3/development/build.html

diff --git a/content/docs/mesher/1.6.3/development/build.html b/content/docs/mesher/1.6.3/development/build.html
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+  <div class="section" id="build-mesher">
+<h1>Build mesher<a class="headerlink" href="#build-mesher" title="Permalink to this headline">¶</a></h1>
+<p>you need to build and release your mesher after the customization</p>
+<div class="section" id="build-binary">
+<h2>Build binary<a class="headerlink" href="#build-binary" title="Permalink to this headline">¶</a></h2>
+<p>you can refer to build/build_proxy to see how we build mesher binary and docker image.</p>
+<p>build/docker/proxy/Dockerfile is a example about how to make a docker image</p>
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+
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+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../configuration.html">User guides</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="../development.html">Development guides</a><ul class="current">
+<li class="toctree-l2"><a class="reference internal" href="handler-chain.html">Handler chain</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Cloud Provider</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#huawei-cloud">Huawei Cloud</a><ul>
+<li class="toctree-l4"><a class="reference internal" href="#access-servicecomb-engine-api">Access ServiceComb Engine API</a></li>
+<li class="toctree-l4"><a class="reference internal" href="#use-config-center-to-manage-configuration">Use Config Center to manage configuration</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l2"><a class="reference internal" href="build.html">Build mesher</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../protocols.html">Protocols</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../istio-guides.html">Use Istio as control plane</a></li>
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+        
+      <li>Cloud Provider</li>
+    
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+          
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+           <div itemprop="articleBody">
+            
+  <div class="section" id="cloud-provider">
+<h1>Cloud Provider<a class="headerlink" href="#cloud-provider" title="Permalink to this headline">¶</a></h1>
+<p>By default Mesher do not support any cloud provider.
+But there is plugin that helps mesher to do it.</p>
+<div class="section" id="huawei-cloud">
+<h2>Huawei Cloud<a class="headerlink" href="#huawei-cloud" title="Permalink to this headline">¶</a></h2>
+<p>Mesher is able to use huawei cloud ServiceComb engine.</p>
+<div class="section" id="access-servicecomb-engine-api">
+<h3>Access ServiceComb Engine API<a class="headerlink" href="#access-servicecomb-engine-api" title="Permalink to this headline">¶</a></h3>
+<p>import auth in cmd/mesher/mesher.go</p>
+<div class="highlight-go notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nx">_</span> <span class="s">&quot;github.com/huaweicse/auth/adaptor/gochassis&quot;</span>
+</pre></div>
+</div>
+<p>it will sign all requests between mesher to ServiceComb Engine.</p>
+</div>
+<div class="section" id="use-config-center-to-manage-configuration">
+<h3>Use Config Center to manage configuration<a class="headerlink" href="#use-config-center-to-manage-configuration" title="Permalink to this headline">¶</a></h3>
+<p>Mesher use servicecomb-kie as config server,</p>
+<div class="highlight-go notranslate"><div class="highlight"><pre><span></span><span class="nx">_</span> <span class="s">&quot;github.com/go-chassis/go-chassis-config/servicecombkie&quot;</span>
+</pre></div>
+</div>
+<p>when you need to use ServiceComb Engine, you must replace this line.
+import config center in cmd/mesher/mesher.go.</p>
+<div class="highlight-go notranslate"><div class="highlight"><pre><span></span><span class="nx">_</span> <span class="s">&quot;github.com/go-chassis/go-chassis-config/configcenter&quot;</span>
+</pre></div>
+</div>
+<p>set the config center in chassis.yaml</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span>  <span class="nt">config</span><span class="p">:</span>
+    <span class="nt">client</span><span class="p">:</span>
+      <span class="nt">serverUri</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">https://xxx</span> <span class="c1">#endpoint of servicecomb engine</span>
+      <span class="nt">refreshMode</span><span class="p">:</span> <span class="nt">1 # 1</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">only pull config.</span>
+      <span class="nt">refreshInterval</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">30</span> <span class="c1"># unit is second</span>
+      <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">config_center</span>
+</pre></div>
+</div>
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+
+
+<!DOCTYPE html>
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+<li class="toctree-l2 current"><a class="current reference internal" href="#">Handler chain</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#how-to-write-a-handler">How to write a handler</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#how-to-use-it-in-handler-chain">How to use it in handler chain</a></li>
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+            
+  <div class="section" id="handler-chain">
+<h1>Handler chain<a class="headerlink" href="#handler-chain" title="Permalink to this headline">¶</a></h1>
+<p>all the traffic will go through the handler chain.
+A chain is composite of handlers, each handler has a particular logic.
+Mesher also has a lots of feature working in chain, like route management, circuit breaking, rate-limiting.
+In Summary, handler is the middle ware between client and servers,
+it is useful, when you want to add authorization to intercept illegal requests.</p>
+<div class="section" id="how-to-write-a-handler">
+<h2>How to write a handler<a class="headerlink" href="#how-to-write-a-handler" title="Permalink to this headline">¶</a></h2>
+<p>https://docs.go-chassis.com/dev-guides/how-to-implement-handler.html</p>
+</div>
+<div class="section" id="how-to-use-it-in-handler-chain">
+<h2>How to use it in handler chain<a class="headerlink" href="#how-to-use-it-in-handler-chain" title="Permalink to this headline">¶</a></h2>
+<p>in chassis.yaml add your handler name in chain configuration.
+as side car and API gateway, mesher’s chain has different meaning.</p>
+<p>For example, running as mesher-sidecar, service A call another service B,
+outgoing chain process all the service A requests before remote call,
+incoming chain process all the requests from service A, before access to service B API.</p>
+<p>In summary outgoing chain works when a service attempt to call other services,
+incoming chain works when other services call this service</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span>  <span class="nt">handler</span><span class="p">:</span>
+    <span class="nt">chain</span><span class="p">:</span>
+      <span class="nt">Consumer</span><span class="p">:</span>
+        <span class="c1"># if a service call other service, it go through this chain, loadbalance and transport is must </span>
+        <span class="nt">outgoing</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">router, bizkeeper-consumer, loadbalance, transport</span>
+      <span class="nt">Provider</span><span class="p">:</span>
+        <span class="nt">incoming</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ratelimiter-provider</span>
+</pre></div>
+</div>
+<p>running as API gateway,
+incoming chain process all the requests from the external network,
+outgoing chain process all the the request between API gateway and backend services</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span>  <span class="nt">handler</span><span class="p">:</span>
+    <span class="nt">chain</span><span class="p">:</span>
+      <span class="nt">Consumer</span><span class="p">:</span>
+        <span class="c1">#loadbalance and transport is must </span>
+        <span class="nt">outgoing</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">router, bizkeeper-consumer, loadbalance, transport</span>
+      <span class="nt">Provider</span><span class="p">:</span>
+        <span class="nt">incoming</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ratelimiter-provider</span>
+</pre></div>
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+            
+  <div class="section" id="quick-start">
+<h1>Quick start<a class="headerlink" href="#quick-start" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="local">
+<h2>Local<a class="headerlink" href="#local" title="Permalink to this headline">¶</a></h2>
+<p>In this case, you will launch one mesher sidecar proxy and
+one service developed based on go-chassis as provider
+and use curl as a dummy consumer to access this service</p>
+<p>the network traffic: curl-&gt;mesher-&gt;service</p>
+<p>1.Install ServiceComb <a class="reference external" href="https://github.com/apache/incubator-servicecomb-service-center/releases">service-center</a></p>
+<p>2.Install <a class="reference external" href="https://go-chassis.readthedocs.io/en/latest/getstarted/install.html">go-chassis</a> and
+run <a class="reference external" href="https://github.com/go-chassis/go-chassis/tree/master/examples/rest/server">rest server</a></p>
+<ol class="simple">
+<li><p>Build and run, use go mod(go 1.11+, experimental but a recommended way)</p></li>
+</ol>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span><span class="nb">cd</span> mesher
+<span class="nv">GO111MODULE</span><span class="o">=</span>on go mod download
+<span class="c1">#optional</span>
+<span class="nv">GO111MODULE</span><span class="o">=</span>on go mod vendor
+go build mesher.go
+./mesher
+</pre></div>
+</div>
+<p>4.verify, in this case curl command is the consumer, mesher is consumer’s sidecar,
+and rest server is provider</p>
+<div class="highlight-shell notranslate"><div class="highlight"><pre><span></span><span class="nb">export</span> <span class="nv">http_proxy</span><span class="o">=</span>http://127.0.0.1:30101
+curl http://RESTServer:8083/sayhello/peter
+</pre></div>
+</div>
+<p><strong>Notice</strong>:</p>
+<blockquote>
+<div><blockquote>
+<div><p>You don’t need to set service registry in chassis.yaml,
+because by default registry address is 127.0.0.1:30100,
+just same service center default listen address.</p>
+</div></blockquote>
+</div></blockquote>
+<blockquote>
+<div><blockquote>
+<div><p>curl command read lower case http_proxy environment variable.</p>
+</div></blockquote>
+</div></blockquote>
+</div>
+<div class="section" id="run-on-different-infrastructure">
+<h2>Run on different infrastructure<a class="headerlink" href="#run-on-different-infrastructure" title="Permalink to this headline">¶</a></h2>
+<p>Mesher does not bind to any platform or infrastructures, plz refer to
+https://github.com/go-mesh/mesher-examples/tree/master/Infrastructure
+to know how to run mesher on different infra</p>
+</div>
+<div class="section" id="sidecar-injector">
+<h2>Sidecar injector<a class="headerlink" href="#sidecar-injector" title="Permalink to this headline">¶</a></h2>
+<p>Mesher supply a way to automatically inject mesher configurations in kubernetes</p>
+<p>See detail https://github.com/go-chassis/sidecar-injector</p>
+</div>
+</div>
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+           <div itemprop="articleBody">
+            
+  <div class="section" id="before-you-start">
+<h1>Before you start<a class="headerlink" href="#before-you-start" title="Permalink to this headline">¶</a></h1>
+<p>Before you start, you must know what you gonna do if you use mesher as your sidecar proxy.</p>
+<p>Assume you launched 2 services,
+each of service has a dedicated mesher as sidecar proxy.</p>
+<p>The network traffic will be: ServiceA-&gt;mesherA-&gt;mesherB-&gt;ServiceB.</p>
+<p>To run mesher along with your services, you need to set minimum configurations as below:</p>
+<ol class="simple">
+<li><p>Give mesher your service name in microservice.yaml file</p></li>
+<li><p>Set service discovery service(service center, Istio etc) configurations in chassis.yaml</p></li>
+<li><p>export HTTP_PROXY=http://127.0.0.1:30101 as your service runtime environment</p></li>
+<li><p>(optional)Give mesher your service port list by ENV SERVICE_PORTS or CLI –service-ports</p></li>
+</ol>
+<p>After the configurations, assume you serviceB is listening at 127.0.0.1:8080</p>
+<p>the serviceA must use http://ServiceB:8080/{api_path} to access ServiceB</p>
+<p>Now you can launch as many as serviceA and serviceB to make this system become a distributed system</p>
+<p><strong>Notice</strong>:</p>
+<blockquote>
+<div><blockquote>
+<div><p>consumer need to use http://provider_name:provider_port/ to access provider,
+instead of http://provider_ip:provider_port/.
+if you choose to set step4, then you can simply use http://provider_name/ to access provider</p>
+</div></blockquote>
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+<li class="toctree-l4"><a class="reference internal" href="development/cloud-provider.html#use-config-center-to-manage-configuration">Use Config Center to manage configuration</a></li>
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+<li class="toctree-l2"><a class="reference internal" href="intro/concepts.html">Concepts</a></li>
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+  <div class="section" id="introductions">
+<h1>Introductions<a class="headerlink" href="#introductions" title="Permalink to this headline">¶</a></h1>
+<div class="toctree-wrapper compound">
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="intro/what-is.html">What is mesher</a></li>
+<li class="toctree-l1"><a class="reference internal" href="intro/concepts.html">Concepts</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="intro/concepts.html#sidecar">Sidecar</a></li>
+<li class="toctree-l2"><a class="reference internal" href="intro/concepts.html#go-chassis">go chassis</a></li>
+<li class="toctree-l2"><a class="reference internal" href="intro/concepts.html#destinationresolver">DestinationResolver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="intro/concepts.html#source-resolver">Source Resolver</a></li>
+<li class="toctree-l2"><a class="reference internal" href="intro/concepts.html#admin-api">Admin API</a></li>
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content/docs/mesher/1.6.3/intro/concepts.html

diff --git a/content/docs/mesher/1.6.3/intro/concepts.html b/content/docs/mesher/1.6.3/intro/concepts.html
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+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+  <script type="text/javascript" src="../_static/js/modernizr.min.js"></script>
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+<li class="toctree-l2"><a class="reference internal" href="what-is.html">What is mesher</a></li>
+<li class="toctree-l2 current"><a class="current reference internal" href="#">Concepts</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#sidecar">Sidecar</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#go-chassis">go chassis</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#destinationresolver">DestinationResolver</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#source-resolver">Source Resolver</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#admin-api">Admin API</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../configuration.html">User guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../development.html">Development guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../protocols.html">Protocols</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../istio-guides.html">Use Istio as control plane</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../sidecar.html">Sidcar-injector Deployment and Usage</a></li>
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+        
+      <li>Concepts</li>
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+      <li class="wy-breadcrumbs-aside">
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+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="concepts">
+<h1>Concepts<a class="headerlink" href="#concepts" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="sidecar">
+<h2>Sidecar<a class="headerlink" href="#sidecar" title="Permalink to this headline">¶</a></h2>
+<p>Mesher leverage
+<a class="reference external" href="https://kubernetes.io/blog/2015/06/the-distributed-system-toolkit-patterns/">distributed design pattern, sidecar</a>
+to work along with service.</p>
+</div>
+<div class="section" id="go-chassis">
+<h2>go chassis<a class="headerlink" href="#go-chassis" title="Permalink to this headline">¶</a></h2>
+<p>Mesher is a light weight sidecar proxy developed on top of go-chassis,
+so it has the same <a class="reference external" href="http://go-chassis.readthedocs.io/en/latest/intro/concepts.html">concepts</a> with it
+and it has all features of go chassis</p>
+</div>
+<div class="section" id="destinationresolver">
+<h2>DestinationResolver<a class="headerlink" href="#destinationresolver" title="Permalink to this headline">¶</a></h2>
+<p>Destination Resolver parse request into a service name</p>
+</div>
+<div class="section" id="source-resolver">
+<h2>Source Resolver<a class="headerlink" href="#source-resolver" title="Permalink to this headline">¶</a></h2>
+<p>source resolver get remote IP and based on remote IP, it</p>
+</div>
+<div class="section" id="admin-api">
+<h2>Admin API<a class="headerlink" href="#admin-api" title="Permalink to this headline">¶</a></h2>
+<p>Listen on isolated port, it gives a way to interact with mesher</p>
+</div>
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content/docs/mesher/1.6.3/intro/what-is.html

diff --git a/content/docs/mesher/1.6.3/intro/what-is.html b/content/docs/mesher/1.6.3/intro/what-is.html
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+
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+<!DOCTYPE html>
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+<p>Mesher is a
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content/docs/mesher/1.6.3/istio/discovery.html

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+           <div itemprop="articleBody">
+            
+  <div class="section" id="discovery">
+<h1>Discovery<a class="headerlink" href="#discovery" title="Permalink to this headline">¶</a></h1>
+<hr class="docutils" />
+<div class="section" id="introduction">
+<h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
+<p>Istio Pilot can be integrated with Mesher, working as the Service Discovery component.</p>
+</div>
+<div class="section" id="configuration">
+<h2>Configuration<a class="headerlink" href="#configuration" title="Permalink to this headline">¶</a></h2>
+<p>edit chassis.yaml.</p>
+<p><strong>registrator.disabled</strong></p>
+<blockquote>
+<div><p>Must disable registrator, because registrator is is used in client side discovery. mesher leverage server side discovery which is supported by kubernetes</p>
+</div></blockquote>
+<p><strong>serviceDiscovery.type</strong></p>
+<blockquote>
+<div><p>specify the discovery plugin type to “pilotv2”, since Istio removes the xDS v1 API support from version 0.7.1, type “pilot” is deprecated.</p>
+</div></blockquote>
+<p><strong>serviceDiscovery.address</strong></p>
+<blockquote>
+<div><p>the pilot address, in a typical Istio environment, pilot usually listens on the grpc port 15010.</p>
+</div></blockquote>
+</div>
+<div class="section" id="examples">
+<h2>examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">cse</span><span class="p">:</span> <span class="c1"># Using xDS v2 API</span>
+  <span class="n">service</span><span class="p">:</span>
+    <span class="n">Registry</span><span class="p">:</span>
+      <span class="n">registrator</span><span class="p">:</span>
+        <span class="n">disabled</span><span class="p">:</span> <span class="n">true</span>
+      <span class="n">serviceDiscovery</span><span class="p">:</span>
+        <span class="nb">type</span><span class="p">:</span> <span class="n">pilotv2</span>
+        <span class="n">address</span><span class="p">:</span> <span class="n">grpc</span><span class="p">:</span><span class="o">//</span><span class="n">istio</span><span class="o">-</span><span class="n">pilot</span><span class="o">.</span><span class="n">istio</span><span class="o">-</span><span class="n">system</span><span class="p">:</span><span class="mi">15010</span>
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+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="egress">
+<h1>Egress<a class="headerlink" href="#egress" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="introduction">
+<h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
+<p>Mesher support Egress for your service, so that you can access any publicly accessible service from your microservice.</p>
+</div>
+<div class="section" id="configuration">
+<h2>Configuration<a class="headerlink" href="#configuration" title="Permalink to this headline">¶</a></h2>
+<p>The egress related configurations is all in egress.yaml.</p>
+<p><strong>infra</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> specifies from where the egress configuration need to be taken supports two values cse or pilot ,
+cse means the egress configuration from egress.yaml file,
+pilot means egress configuaration are taken from pilot of istio,
+default is <em>cse</em></p>
+</div></blockquote>
+<p><strong>address</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> The end point of pilot from which configuration need to be fetched.</p>
+</div></blockquote>
+<p><strong>hosts</strong></p>
+<blockquote>
+<div><p><em>(optional, []string)</em> host associated with external service, could be a DNS name with wildcard prefix</p>
+</div></blockquote>
+<p><strong>ports.port</strong></p>
+<blockquote>
+<div><p><em>(optional, int)</em> The port associated with the external service, default is <em>80</em></p>
+</div></blockquote>
+<p><strong>ports.protocol</strong></p>
+<blockquote>
+<div><p><em>(optional, int)</em> The protocol associated with the external service,supports only http default is <em>HTTP</em></p>
+</div></blockquote>
+</div>
+<div class="section" id="example">
+<h2>example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
+<p>edit egress.yaml</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">egress</span><span class="p">:</span>
+  <span class="nt">infra</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">cse</span>  <span class="c1"># pilot or cse</span>
+  <span class="nt">address</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">http://istio-pilot.istio-system:15010</span>
+<span class="nt">egressRule</span><span class="p">:</span>
+  <span class="nt">google-ext</span><span class="p">:</span>
+    <span class="p p-Indicator">-</span> <span class="nt">hosts</span><span class="p">:</span>
+        <span class="p p-Indicator">-</span> <span class="s">&quot;www.google.com&quot;</span>
+        <span class="p p-Indicator">-</span> <span class="s">&quot;*.yahoo.com&quot;</span>
+      <span class="nt">ports</span><span class="p">:</span>
+        <span class="p p-Indicator">-</span> <span class="nt">port</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">80</span>
+          <span class="nt">protocol</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">HTTP</span>
+</pre></div>
+</div>
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+<li class="toctree-l2 current"><a class="current reference internal" href="#">Get started</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#the-routing-tags-in-istio">The routing tags in Istio</a></li>
+</ul>
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+<li class="toctree-l2"><a class="reference internal" href="discovery.html">Discovery</a></li>
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+           <div itemprop="articleBody">
+            
+  <div class="section" id="get-started">
+<h1>Get started<a class="headerlink" href="#get-started" title="Permalink to this headline">¶</a></h1>
+<p>Istio Pilot can be configured as the service discovery component for mesher. By default the Pilot plugin is not compiled into mesher binary. To make mesher work with Pilot, import the plugin in mesher’s entrypoint source code:</p>
+<div class="highlight-go notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nx">_</span> <span class="s">&quot;github.com/apache/servicecomb-mesher/plugins/registry/istiov2&quot;</span>
+</pre></div>
+</div>
+<p>Then the Pilot plugin will be installed when mesher starts. Next step, configure Pilot as service discovery in <code class="docutils literal notranslate"><span class="pre">chassis.yaml</span></code>:</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">cse</span><span class="p">:</span>
+  <span class="nt">service</span><span class="p">:</span>
+    <span class="nt">registry</span><span class="p">:</span>
+      <span class="nt">registrator</span><span class="p">:</span>
+        <span class="nt">disabled</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+      <span class="nt">serviceDiscovery</span><span class="p">:</span>
+        <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">pilotv2</span>
+        <span class="nt">address</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">grpc://istio-pilot.istio-system:15010</span>
+</pre></div>
+</div>
+<p>Since mesher doesn’t have to register the service to Pilot, the registrator config item should be disabled. Make serviceDiscovery.type to be pilotv2, to get service information by xDS v2 API(the v1 API is deprecated).</p>
+<div class="section" id="the-routing-tags-in-istio">
+<h2>The routing tags in Istio<a class="headerlink" href="#the-routing-tags-in-istio" title="Permalink to this headline">¶</a></h2>
+<p>In the original mesher configuration, user can specify tag based route rules, as described below:</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="c1">## router.yaml</span>
+<span class="nt">router</span><span class="p">:</span>
+  <span class="nt">infra</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">cse</span>
+<span class="nt">routeRule</span><span class="p">:</span>
+  <span class="nt">targetService</span><span class="p">:</span>
+    <span class="p p-Indicator">-</span> <span class="nt">precedence</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">2</span>
+      <span class="nt">route</span><span class="p">:</span>
+      <span class="p p-Indicator">-</span> <span class="nt">tags</span><span class="p">:</span>
+          <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+        <span class="nt">weight</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">40</span>
+      <span class="p p-Indicator">-</span> <span class="nt">tags</span><span class="p">:</span>
+          <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v2</span>
+          <span class="nt">debug</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+        <span class="nt">weight</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">40</span>
+      <span class="p p-Indicator">-</span> <span class="nt">tags</span><span class="p">:</span>
+          <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v3</span>
+        <span class="nt">weight</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">20</span>
+</pre></div>
+</div>
+<p>Then in a typical Istio environment, which is likely to be Kubernetes cluster, user can specify the DestinationRules for targetService with the same tags:</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">networking.istio.io/v1alpha3</span>
+<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">DestinationRule</span>
+<span class="nt">metadata</span><span class="p">:</span>
+  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">targetService</span>
+<span class="nt">spec</span><span class="p">:</span>
+  <span class="nt">host</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">targetService</span>
+  <span class="nt">subsets</span><span class="p">:</span>
+  <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+    <span class="nt">labels</span><span class="p">:</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+  <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v2</span>
+    <span class="nt">labels</span><span class="p">:</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v2</span>
+      <span class="nt">debug</span><span class="p">:</span> <span class="s">&quot;true&quot;</span>
+  <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v3</span>
+    <span class="nt">labels</span><span class="p">:</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v3</span>
+</pre></div>
+</div>
+<p>Notice that the subsets’ tags are the same with those in <code class="docutils literal notranslate"><span class="pre">router.yaml</span></code>, then mesher’s tag based load balancing strategy works as it originally does.</p>
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+            
+  <div class="section" id="route-rule">
+<h1>Route Rule<a class="headerlink" href="#route-rule" title="Permalink to this headline">¶</a></h1>
+<p>Instead of using CSE and route config to manage route, mesher supports Istio as a control plane to set route rule and follows the envoy API reference to manage route. This page gives the examples to show how requests are routed between micro services.</p>
+<div class="section" id="mesher-configurations">
+<h2>Mesher Configurations<a class="headerlink" href="#mesher-configurations" title="Permalink to this headline">¶</a></h2>
+<p>In <strong>Consumer</strong> router.yaml, you can set router.infra to define which router plugin mesher fetches from.  The default router.infra  is cse, which means the routerule comes from route config in CSE config-center. If router.infra is set to be pilotv2, the router.address is necessary, such as the in-cluster istio-pilot grpc address.</p>
+<blockquote>
+<div><p>Notice that <code class="docutils literal notranslate"><span class="pre">infra:</span> <span class="pre">pilot</span></code> is deprecated since Istio removes the xDS v1 API from 0.7.1</p>
+</div></blockquote>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">router</span><span class="p">:</span>
+  <span class="nt">infra</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">pilotv2</span> <span class="c1"># pilotv2 or cse</span>
+  <span class="nt">address</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">grpc://istio-pilot.istio-system:15010</span>
+</pre></div>
+</div>
+<p>In <strong>Both</strong> consumer and provider registry configurations, the recommended one shows below.</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">cse</span><span class="p">:</span>
+  <span class="nt">service</span><span class="p">:</span>
+    <span class="nt">registry</span><span class="p">:</span>
+      <span class="nt">registrator</span><span class="p">:</span>
+        <span class="nt">disabled</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+      <span class="nt">serviceDiscovery</span><span class="p">:</span>
+        <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">pilotv2</span>
+        <span class="nt">address</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">grpc://istio-pilot.istio-system:15010</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="kubernetes-configurations">
+<h2>Kubernetes Configurations<a class="headerlink" href="#kubernetes-configurations" title="Permalink to this headline">¶</a></h2>
+<p>The provider applications of v1, v2 and v3 version could be deployed in kubernetes cluster as <strong>Deployment</strong> with differenent labels. The labels of version is necessary now,  and you need to set env to generate nodeID in Istio system, such as <strong>POD_NAMESPACE, POD_NAME</strong> and <strong>INSTANCE_IP</strong>.</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">extensions/v1beta1</span>
+<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">Deployment</span>
+<span class="nt">metadata</span><span class="p">:</span>
+  <span class="nt">labels</span><span class="p">:</span>
+    <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+    <span class="nt">app</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">pilot</span>
+    <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver-v1</span>
+  <span class="nt">namespace</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">default</span>
+<span class="nt">spec</span><span class="p">:</span>
+  <span class="nt">progressDeadlineSeconds</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">600</span>
+  <span class="nt">replicas</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">1</span>
+  <span class="nt">revisionHistoryLimit</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">10</span>
+  <span class="nt">selector</span><span class="p">:</span>
+    <span class="nt">matchLabels</span><span class="p">:</span>
+      <span class="nt">app</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">pilot</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+      <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+  <span class="nt">strategy</span><span class="p">:</span>
+    <span class="nt">rollingUpdate</span><span class="p">:</span>
+      <span class="nt">maxSurge</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">1</span>
+      <span class="nt">maxUnavailable</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">1</span>
+    <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">RollingUpdate</span>
+  <span class="nt">template</span><span class="p">:</span>
+    <span class="nt">metadata</span><span class="p">:</span>
+      <span class="nt">labels</span><span class="p">:</span>
+        <span class="nt">app</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">pilot</span>
+        <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+        <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+    <span class="nt">spec</span><span class="p">:</span>
+      <span class="nt">containers</span><span class="p">:</span>
+      <span class="p p-Indicator">-</span> <span class="nt">image</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">gosdk-istio-server:latest</span>
+        <span class="nt">imagePullPolicy</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">Always</span>
+        <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver-v1</span>
+        <span class="nt">ports</span><span class="p">:</span>
+        <span class="p p-Indicator">-</span> <span class="nt">containerPort</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">8084</span>
+          <span class="nt">protocol</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">TCP</span>
+        <span class="nt">resources</span><span class="p">:</span> <span class="p p-Indicator">{}</span>
+        <span class="nt">terminationMessagePath</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/dev/termination-log</span>
+        <span class="nt">terminationMessagePolicy</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">File</span>
+        <span class="nt">env</span><span class="p">:</span>
+        <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">CSE_SERVICE_CENTER</span>
+          <span class="nt">value</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">grpc://istio-pilot.istio-system:15010</span>
+        <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">POD_NAME</span>
+          <span class="nt">valueFrom</span><span class="p">:</span>
+            <span class="nt">fieldRef</span><span class="p">:</span>
+              <span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+              <span class="nt">fieldPath</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">metadata.name</span>
+        <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">POD_NAMESPACE</span>
+          <span class="nt">valueFrom</span><span class="p">:</span>
+            <span class="nt">fieldRef</span><span class="p">:</span>
+              <span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+              <span class="nt">fieldPath</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">metadata.namespace</span>
+        <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">INSTANCE_IP</span>
+          <span class="nt">valueFrom</span><span class="p">:</span>
+            <span class="nt">fieldRef</span><span class="p">:</span>
+              <span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+              <span class="nt">fieldPath</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">status.podIP</span>
+        <span class="nt">volumeMounts</span><span class="p">:</span>
+        <span class="p p-Indicator">-</span> <span class="nt">mountPath</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/etc/certs/</span>
+          <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istio-certs</span>
+          <span class="nt">readOnly</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+      <span class="nt">dnsPolicy</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ClusterFirst</span>
+      <span class="nt">initContainers</span><span class="p">:</span>
+      <span class="nt">restartPolicy</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">Always</span>
+      <span class="nt">schedulerName</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">default-scheduler</span>
+      <span class="nt">securityContext</span><span class="p">:</span> <span class="p p-Indicator">{}</span>
+      <span class="nt">terminationGracePeriodSeconds</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">30</span>
+      <span class="nt">volumes</span><span class="p">:</span>
+      <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istio-certs</span>
+        <span class="nt">secret</span><span class="p">:</span>
+          <span class="nt">defaultMode</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">420</span>
+          <span class="nt">optional</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>
+          <span class="nt">secretName</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istio.default</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="istio-v1alpha3-router-configurations">
+<h2>Istio v1alpha3 router configurations<a class="headerlink" href="#istio-v1alpha3-router-configurations" title="Permalink to this headline">¶</a></h2>
+<p><a class="reference external" href="https://istio.io/docs/tasks/traffic-management/request-routing/">Traffic-management</a> gives references and examples of Istio new router rule schema. First, subsets is defined according to labels. Then you can set route rule of differenent weight for virtual services.</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">networking.istio.io/v1alpha3</span>
+<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">DestinationRule</span>
+<span class="nt">metadata</span><span class="p">:</span>
+  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+<span class="nt">spec</span><span class="p">:</span>
+  <span class="nt">host</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+  <span class="nt">subsets</span><span class="p">:</span>
+  <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+    <span class="nt">labels</span><span class="p">:</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+  <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v2</span>
+    <span class="nt">labels</span><span class="p">:</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v2</span>
+  <span class="p p-Indicator">-</span> <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v3</span>
+    <span class="nt">labels</span><span class="p">:</span>
+      <span class="nt">version</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v3</span>
+</pre></div>
+</div>
+<blockquote>
+<div><p><strong>NOTICE: The subsets only support labels of version to distinguish differenent virtual services, this constrains will canceled later.</strong></p>
+</div></blockquote>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">networking.istio.io/v1alpha3</span>
+<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">VirtualService</span>
+<span class="nt">metadata</span><span class="p">:</span>
+  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+<span class="nt">spec</span><span class="p">:</span>
+  <span class="nt">hosts</span><span class="p">:</span>
+    <span class="p p-Indicator">-</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+  <span class="nt">http</span><span class="p">:</span>
+  <span class="p p-Indicator">-</span> <span class="nt">route</span><span class="p">:</span>
+    <span class="p p-Indicator">-</span> <span class="nt">destination</span><span class="p">:</span>
+        <span class="nt">host</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+        <span class="nt">subset</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
+      <span class="nt">weight</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">25</span>
+    <span class="p p-Indicator">-</span> <span class="nt">destination</span><span class="p">:</span>
+        <span class="nt">host</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+        <span class="nt">subset</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v2</span>
+      <span class="nt">weight</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">25</span>
+    <span class="p p-Indicator">-</span> <span class="nt">destination</span><span class="p">:</span>
+        <span class="nt">host</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">istioserver</span>
+        <span class="nt">subset</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v3</span>
+      <span class="nt">weight</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">50</span>
+</pre></div>
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content/docs/mesher/1.6.3/mesher-sidecar.html

diff --git a/content/docs/mesher/1.6.3/mesher-sidecar.html b/content/docs/mesher/1.6.3/mesher-sidecar.html
new file mode 100644
index 0000000..1dd5c7f
--- /dev/null
+++ b/content/docs/mesher/1.6.3/mesher-sidecar.html
@@ -0,0 +1,214 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+           <div itemprop="articleBody">
+            
+  <div class="section" id="sidecar-usage-guide">
+<h1>Sidecar usage guide<a class="headerlink" href="#sidecar-usage-guide" title="Permalink to this headline">¶</a></h1>
+<div class="toctree-wrapper compound">
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="sidecar.html">Sidcar-injector Deployment and Usage</a><ul>
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+<li class="toctree-l2"><a class="reference internal" href="sidecar.html#manual-sidecar-injection">Manual sidecar injection</a></li>
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content/docs/mesher/1.6.3/objects.inv

diff --git a/content/docs/mesher/1.6.3/objects.inv b/content/docs/mesher/1.6.3/objects.inv
new file mode 100644
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--- /dev/null
+++ b/content/docs/mesher/1.6.3/objects.inv
Binary files differ

content/docs/mesher/1.6.3/protocols.html

diff --git a/content/docs/mesher/1.6.3/protocols.html b/content/docs/mesher/1.6.3/protocols.html
new file mode 100644
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--- /dev/null
+++ b/content/docs/mesher/1.6.3/protocols.html
@@ -0,0 +1,219 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
+<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
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+  
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  
+  <title>Protocols &mdash; go-chassis  documentation</title>
+  
+
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+  
+  
+  
+
+  
+  <script type="text/javascript" src="_static/js/modernizr.min.js"></script>
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+      <script type="text/javascript" id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
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+<li class="toctree-l1"><a class="reference internal" href="get-started.html">Get started</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="development.html">Development guides</a></li>
+<li class="toctree-l1 current"><a class="current reference internal" href="#">Protocols</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="protocols/grpc.html">gRPC Protocol</a></li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="istio-guides.html">Use Istio as control plane</a></li>
+<li class="toctree-l1"><a class="reference internal" href="sidecar.html">Sidcar-injector Deployment and Usage</a></li>
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+            
+  <div class="section" id="protocols">
+<h1>Protocols<a class="headerlink" href="#protocols" title="Permalink to this headline">¶</a></h1>
+<div class="toctree-wrapper compound">
+<ul>
+<li class="toctree-l1"><a class="reference internal" href="protocols/grpc.html">gRPC Protocol</a><ul>
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+<li class="toctree-l2"><a class="reference internal" href="protocols/grpc.html#how-to-use-mesher-as-sidecar-proxy">How to use mesher as sidecar proxy</a></li>
+<li class="toctree-l2"><a class="reference internal" href="protocols/grpc.html#example">example</a></li>
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content/docs/mesher/1.6.3/protocols/grpc.html

diff --git a/content/docs/mesher/1.6.3/protocols/grpc.html b/content/docs/mesher/1.6.3/protocols/grpc.html
new file mode 100644
index 0000000..cfe2544
--- /dev/null
+++ b/content/docs/mesher/1.6.3/protocols/grpc.html
@@ -0,0 +1,244 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="../intro.html">Introductions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../get-started.html">Get started</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../configuration.html">User guides</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../development.html">Development guides</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="../protocols.html">Protocols</a><ul class="current">
+<li class="toctree-l2 current"><a class="current reference internal" href="#">gRPC Protocol</a><ul>
+<li class="toctree-l3"><a class="reference internal" href="#configurations">Configurations</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#how-to-use-mesher-as-sidecar-proxy">How to use mesher as sidecar proxy</a></li>
+<li class="toctree-l3"><a class="reference internal" href="#example">example</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="../istio-guides.html">Use Istio as control plane</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../sidecar.html">Sidcar-injector Deployment and Usage</a></li>
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+        
+      <li>gRPC Protocol</li>
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+            <a href="../_sources/protocols/grpc.md.txt" rel="nofollow"> View page source</a>
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+  <div class="section" id="grpc-protocol">
+<h1>gRPC Protocol<a class="headerlink" href="#grpc-protocol" title="Permalink to this headline">¶</a></h1>
+<p>Mesher support gRPC protocol</p>
+<div class="section" id="configurations">
+<h2>Configurations<a class="headerlink" href="#configurations" title="Permalink to this headline">¶</a></h2>
+<p>To enable gRPC proxy you must set the protocol config</p>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">cse</span><span class="p">:</span>
+  <span class="nt">protocols</span><span class="p">:</span>
+    <span class="nt">grpc</span><span class="p">:</span>
+      <span class="nt">listenAddress</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">127.0.0.1:40101</span> <span class="c1"># or internalIP:port</span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="how-to-use-mesher-as-sidecar-proxy">
+<h2>How to use mesher as sidecar proxy<a class="headerlink" href="#how-to-use-mesher-as-sidecar-proxy" title="Permalink to this headline">¶</a></h2>
+<p>Assume you original client is</p>
+<div class="highlight-go notranslate"><div class="highlight"><pre><span></span>	<span class="nx">conn</span><span class="p">,</span> <span class="nx">err</span> <span class="o">:=</span> <span class="nx">grpc</span><span class="p">.</span><span class="nx">Dial</span><span class="p">(</span><span class="s">&quot;10.0.1.1:50051&quot;</span><span class="p">,</span>
+		<span class="nx">grpc</span><span class="p">.</span><span class="nx">WithInsecure</span><span class="p">(),</span>
+		<span class="p">)</span>
+</pre></div>
+</div>
+<p>set http_proxy</p>
+<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nb">export</span> <span class="nv">http_proxy</span><span class="o">=</span>http://127.0.0.1:40100
+</pre></div>
+</div>
+</div>
+<div class="section" id="example">
+<h2>example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
+<p>A gRPC example is <a class="reference external" href="https://github.com/go-mesh/mesher-examples/tree/master/protocol/grpc-go">here</a></p>
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content/docs/mesher/1.6.3/searchindex.js

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+  <div class="section" id="sidcar-injector-deployment-and-usage">
+<h1>Sidcar-injector Deployment and Usage<a class="headerlink" href="#sidcar-injector-deployment-and-usage" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="introduction">
+<h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
+<p>Sidecar is a way to run alongside your service as a second process.
+The role of the sidecar is to augment and improve the application container, often without the application container’s knowledge.</p>
+<p>sidecar is a pattern of “Single-node, multi container application”.</p>
+<p>This pattern is particularly useful when using kubernetes as container orchestration platform.
+Kubernetes uses pods. A pod is composed of one or more application containers. A sidecar is a utility container in the pod and its purpose is to support the main container. It is important to note that standalone sidecar doesnot serve any purpose, it must be paired with one or more main containers.
+Generally, sidecar container is reusable and can be paired with numerous type of main containers.</p>
+<p>For design pattern please refer</p>
+<p><a class="reference external" href="https://static.googleusercontent.com/media/research.google.com/en//pubs/archive/45406.pdf">Container Design Pattern</a></p>
+<p>Example:
+The main container might be a web server, and it might be paired with a “logsaver” sidecar container that collects the web server’s logs from local disk and streams them to a cluster.</p>
+</div>
+<div class="section" id="injection">
+<h2>Injection<a class="headerlink" href="#injection" title="Permalink to this headline">¶</a></h2>
+<p>Two types</p>
+<ol class="arabic simple">
+<li><p>Manual sidecar injection</p></li>
+<li><p>Automatic sidecar injection</p></li>
+</ol>
+</div>
+<div class="section" id="manual-sidecar-injection">
+<h2>Manual sidecar injection<a class="headerlink" href="#manual-sidecar-injection" title="Permalink to this headline">¶</a></h2>
+<p>In manual sidecar injection user has to provide sidecar information in deployment.</p>
+<blockquote>
+<div><img alt="communication" src="_images/pod.png" />
+</div></blockquote>
+</div>
+<div class="section" id="automatic-sidecar-injection">
+<h2>Automatic sidecar injection<a class="headerlink" href="#automatic-sidecar-injection" title="Permalink to this headline">¶</a></h2>
+<p>Sidecars can be automatically added to applicable Kubernetes pods using</p>
+<p><a class="reference external" href="https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/">mutating webhook admission controller</a>
+Note that unlike manual injection, automatic injection occurs at the pod-level.
+You won’t see any change to the deployment itself.</p>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector#verification">Verify</a></p>
+</div>
+<div class="section" id="how-it-works">
+<h2>How it works<a class="headerlink" href="#how-it-works" title="Permalink to this headline">¶</a></h2>
+<p>sidecar will deploy along side with main container as shown below</p>
+<p>The figure shows the client and server communication using mesher as a sidecar.</p>
+<blockquote>
+<div><img alt="communication" src="_images/mesher.png" />
+</div></blockquote>
+<p>Explanation:</p>
+<p>Mesher is deployed as a sidecar along with main container of server and client in a pod.</p>
+<p>client and server will implement some rest api’s
+and functionalities like
+loadbalance, circuit-breaker, fault-injection, routerule, discovery etc… will be provided by mesher(sidecar).</p>
+<p>workflow:</p>
+<p>user/curl—–&gt;client(main container)—–&gt;mesher(sidecar container)—–&gt;mesher(sidecar container)—–&gt;server(main container).</p>
+</div>
+<div class="section" id="deployment-of-sidecar-injector">
+<h2>Deployment Of Sidecar-Injector<a class="headerlink" href="#deployment-of-sidecar-injector" title="Permalink to this headline">¶</a></h2>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector#prerequisites">Prerequisites</a></p>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector#quick-start">Quick start</a></p>
+<p>Use below links to build and Install sidecar</p>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector#build">build</a>
+<a class="reference external" href="https://github.com/go-chassis/sidecar-injector#install">install</a></p>
+</div>
+<div class="section" id="annotations">
+<h2>Annotations<a class="headerlink" href="#annotations" title="Permalink to this headline">¶</a></h2>
+<p>Refer k8s document</p>
+<p><a class="reference external" href="https://kubernetes.io/docs/concepts/overview/working-with-objects/annotations/">Annotation</a></p>
+</div>
+<div class="section" id="deployment-of-application">
+<h2>Deployment of application<a class="headerlink" href="#deployment-of-application" title="Permalink to this headline">¶</a></h2>
+<p>The Sidecar-injector will automatically inject mesher containers into your application pods.</p>
+<p>Following are the annotations used to inject mesher sidecar into the user pod</p>
+<ol class="arabic">
+<li><p>sidecar.mesher.io/inject:</p>
+<blockquote>
+<div><p>The allowed values are “yes” or “y”</p>
+<p>If “yes” or “y” provided the sidecar will inject in the main container.
+If not, sidecar will not inject in the main container.</p>
+</div></blockquote>
+</li>
+<li><p>sidecar.mesher.io/discoveryType:</p>
+<blockquote>
+<div><p>The allowed values are “sc” and “pilot”</p>
+<p>If value is “sc” it will use serviecComb service-center as a registry and discovery.
+If value is “pilot” it will use the istio pilot as a discovery.</p>
+</div></blockquote>
+</li>
+<li><p>sidecar.mesher.io/servicePorts:</p>
+<blockquote>
+<div><p>serviceports are the port values of actual main server container append with “rest or grps”</p>
+<p>ex: sidecar.mesher.io/servicePorts: rest:9999</p>
+</div></blockquote>
+</li>
+</ol>
+<dl class="simple">
+<dt>Required annotation for client and server</dt><dd><p>sidecar.mesher.io/inject:</p>
+</dd>
+<dt>Optional annotation for client and server</dt><dd><p>sidecar.mesher.io/discoveryType:</p>
+</dd>
+<dt>Optional annotation for server</dt><dd><p>sidecar.mesher.io/servicePorts:</p>
+</dd>
+</dl>
+</div>
+<div class="section" id="prerequisites-before-deploying-application">
+<h2>Prerequisites before deploying application<a class="headerlink" href="#prerequisites-before-deploying-application" title="Permalink to this headline">¶</a></h2>
+<p>Label the chassis namespace with sidecar-injector=enabled</p>
+<p><strong>kubectl label namespace chassis sidecar-injector=enabled</strong></p>
+<p><strong>kubectl get namespace -L sidecar-injector</strong></p>
+<blockquote>
+<div><img alt="communication" src="_images/label.png" />
+</div></blockquote>
+</div>
+<div class="section" id="usage-of-istio">
+<h2>Usage of istio<a class="headerlink" href="#usage-of-istio" title="Permalink to this headline">¶</a></h2>
+<p>To use istio following are the required annotation to be given in client and server yaml file
+sidecar.mesher.io/inject: “yes” and sidecar.mesher.io/discoveryType:”pilot”</p>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector/tree/master/example/WithoutServicePort/pilot">Example to use pilot registry</a></p>
+<p>deploy the examples using kubectl command line</p>
+<p><cite>kubectl create -f &lt;filename.yaml&gt; -n chassis</cite></p>
+</div>
+<div class="section" id="usage-of-servicecomb">
+<h2>Usage of serviceComb<a class="headerlink" href="#usage-of-servicecomb" title="Permalink to this headline">¶</a></h2>
+<p>To use service-center following are the required annotation to be given in client and server yaml file
+sidecar.mesher.io/inject: “yes” and sidecar.mesher.io/discoveryType:”sc”</p>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector/tree/master/example/WithoutServicePort/sc">Example to use sc registry</a></p>
+<p>deploy the examples using kubectl command line</p>
+<p><cite>kubectl create -f &lt;filename.yaml&gt; -n chassis</cite></p>
+</div>
+<div class="section" id="verification">
+<h2>Verification<a class="headerlink" href="#verification" title="Permalink to this headline">¶</a></h2>
+<p><a class="reference external" href="https://github.com/go-chassis/sidecar-injector#verification">Follow</a></p>
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+            
+  <div class="section" id="skywalking">
+<h1>SkyWalking<a class="headerlink" href="#skywalking" title="Permalink to this headline">¶</a></h1>
+<p>Skywalking-manager is a handler plugin of mesher, it reports tracing data to skywalking server.</p>
+<div class="section" id="configurations">
+<h2>Configurations<a class="headerlink" href="#configurations" title="Permalink to this headline">¶</a></h2>
+<p><strong>In conf/mesher.conf</strong></p>
+<p><strong>servicecomb.apm.tracing.enable</strong></p>
+<blockquote>
+<div><p><em>(optional, bool)</em> enable application performance manager</p>
+</div></blockquote>
+<p><strong>servicecomb.apm.tracing.serverUri</strong></p>
+<blockquote>
+<div><p><em>(optional, string)</em> server address of skywalking</p>
+</div></blockquote>
+</div>
+<div class="section" id="example">
+<h2>Example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
+<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">servicecomb</span><span class="p">:</span>
+  <span class="nt">apm</span><span class="p">:</span>                              <span class="c1">#application performance monitor</span>
+    <span class="nt">tracing</span><span class="p">:</span>
+      <span class="nt">enable</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">true</span>                  <span class="c1">#enable tracing ability</span>
+      <span class="nt">serverUri</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">127.0.0.1:11800</span>    <span class="c1">#url of skywalking </span>
+</pre></div>
+</div>
+</div>
+<div class="section" id="step">
+<h2>Step：<a class="headerlink" href="#step" title="Permalink to this headline">¶</a></h2>
+</div>
+</div>
+<div class="section" id="skywawlking-manager-init">
+<h1>1. SkyWawlking-Manager Init<a class="headerlink" href="#skywawlking-manager-init" title="Permalink to this headline">¶</a></h1>
+<p><strong>You must init skywawlking manager pkg which will manage connection and report msg to skywalking</strong></p>
+<ul class="simple">
+<li><p>For example:</p></li>
+<li><p>[1] You can import skywalking manager proxy/pkg/skywalking in file proxy/bootstrap/bootstrap.go.</p></li>
+<li><p>[2] Calling function Init() in proxy/pkg/skywalking manually to init skywalking manager.</p></li>
+<li><p>[3] Adding skywalking’s consumer handler name SkyWalkingConsumer defined in proxy/pkg/skywalking to consumerChain.</p></li>
+<li><p>[4] Adding skywalking’s provider handler name SkyWalkingProvider defined in proxy/pkg/skywalking to providerChain.</p></li>
+<li><p>more details about handler chains in <a class="reference external" href="https://github.com/go-chassis/go-chassis#readme">go-chassis</a></p></li>
+</ul>
+</div>
+<div class="section" id="skywalking-handler-init">
+<h1>2. SkyWalking-Handler Init<a class="headerlink" href="#skywalking-handler-init" title="Permalink to this headline">¶</a></h1>
+<ul class="simple">
+<li><p>You must import proxy/handler pkg to init skywalking handler. Not only skywalking handler, all the handlers which are customized for mesher are defined here.</p></li>
+<li><p>For example you can import handler pkg in file cmd/mesher/mesher.go</p></li>
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+    <meta itemprop="datePublished" content="October 15, 2018">
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+          <header>
+            <h1 class="page__title" itemprop="headline">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>​<strong>Event Date/Time</strong>: Thursday, October 11, 2018, 15:15 – 18:30</p>
+
+<p><strong>Event Location</strong>: Workshop Hall 3, Nimhans Convention Center, Bangalore, India</p>
+
+<p>Open Source India (OSI) is an attempt by the team at Open Source For You magazine in partnership with India’s Open Source community and industry—to bring various stake-holders under one roof. The mission of OSI is simple—to accelerate development and deployment of Open Source in India, and beyond.</p>
+
+<p>Around 70+ experts shared their knowledge and expertise in this Summit with around 20 Tech Talks and 11 Workshops with 8 different tracks.</p>
+
+<p><strong>Workshop</strong></p>
+
+<p>MONOLITH TO MICRO-SERVICES: A HANDS ON WORKSHOP FOR DEVELOPMENT OF MICRO-SERVICES USING OPEN SOURCE FRAMEWORKS</p>
+
+<p><img src="/assets/images/OSI/Title.png" alt="3" />
+<img src="/assets/images/OSI/Topics.png" alt="4" /></p>
+
+<h2 id="workshop-glimpse">Workshop Glimpse</h2>
+<p><img src="/assets/images/OSI/OSI-Workshop-1.jpg" alt="5" /></p>
+
+<h2 id="event-glimpse">Event Glimpse</h2>
+<p><img src="/assets/images/OSI/OSI-Event-Glimpse.jpg" alt="5" /></p>
+
+<h2 id="summary">Summary</h2>
+<ul>
+  <li>Around 70% of the Workshop attendees were already using Microservices in production.</li>
+  <li>Very few people were aware about leading Opensource Microservices framework, most of them were using some commercial Microservices solution.</li>
+  <li>Most of the attendees were not having clear directions of how to choose Opensource frameworks for their specific use cases.</li>
+  <li>Attendees were delighted to know that ServiceComb offers a complete full stack solution for Microservices and is backed by a big opensource community.</li>
+  <li>Most of them were able to understand how to develop microservices using ServiceComb SDK’s.</li>
+</ul>
+
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+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> Updated:</strong> <time datetime="2018-10-15">October 15, 2018</time></p>
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+    <meta itemprop="headline" content="Distributed Tracing">
+    <meta itemprop="description" content="Introduce how to use distributed tracing with ServiceComb in the BMI application">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Distributed Tracing
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#before-you-start" id="markdown-toc-before-you-start">Before you start</a></li>
+  <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+  <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
+  <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Distributed handler chain tracing is used to monitor the network latencies and visualize the flow of requests through microservices. This guide shows how to use distributed tracing with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<ol>
+  <li>
+    <p>Add distributed tracing dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI calculator service</em>:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Add handler chain of distributed tracing in <code class="highlighter-rouge">microservice.yaml</code> of <em>BMI calculator service</em>:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Add distributed tracing dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI web service</em>:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>The above configurations have already set up in the code. All you need to do is as follows:</p>
+
+<ol>
+  <li>
+    <p>Run <em>Zipkin</em> distributed service inside Docker.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 9411:9411 openzipkin/zipkin
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Restart <em>BMI calculator service</em> with the following command:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=tracing-provider"</span>
+</code></pre></div>    </div>
+    <p>or</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+ mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=tracing-provider"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Restart <em>BMI web service</em> with the following command:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dservicecomb.tracing.enabled=true"</span>
+</code></pre></div>    </div>
+    <p>or</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+ mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"--Dservicecomb.tracing.enabled=true"</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="verification">Verification</h2>
+
+<ol>
+  <li>
+    <p>Visit <a>http://localhost:8889</a> . Input a positive height and weight and then click <em>Submit</em> button.</p>
+  </li>
+  <li>
+    <p>Visit <a>http://localhost:9411</a> to checkout the status of distributed tracing and get the following figure.</p>
+  </li>
+</ol>
+
+<p><img src="/assets/images/distributed-tracing-result.png" alt="Distributed tracing result" class="align-center" /></p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>Learn more about <a href="/users/distributed-tracing/">Distributed Tracing</a></p>
+  </li>
+  <li>
+    <p>Read <a href="/docs/tracing-with-servicecomb/">Distributed Tracing with ServiceComb and Zipkin</a></p>
+  </li>
+  <li>
+    <p>See <a href="/users/">ServiceComb User Guide</a></p>
+  </li>
+  <li>
+    <p>Learn more from <a href="/docs/linuxcon-workshop-demo/">the Company application</a> for a more complete example of microservice applications integrated with ServiceComb</p>
+  </li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>
+</code></pre></div></div>
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+    <meta itemprop="headline" content="Flow Control">
+    <meta itemprop="description" content="Introduce how to use flow control with ServiceComb in the BMI application">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Flow Control
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#before-you-start" id="markdown-toc-before-you-start">Before you start</a></li>
+  <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+  <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
+  <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Flow control mechanism controls the transmission speed to avoid microservices being overloaded. This guide shows how to use flow control with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<ol>
+  <li>
+    <p>Add flow control dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI calculator service</em>:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>handler-flowcontrol-qps<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Add handler chain and configurations of flow control in <code class="highlighter-rouge">microservice.yaml</code> of <em>BMI calculator service</em>:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-provider</span>
+  <span class="na">flowcontrol</span><span class="pi">:</span>
+    <span class="na">Provider</span><span class="pi">:</span>
+      <span class="na">qps</span><span class="pi">:</span>
+        <span class="na">limit</span><span class="pi">:</span>
+          <span class="na">gateway</span><span class="pi">:</span> <span class="m">1</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>The above configurations have already set up in the code. All you need to do is to stop all <strong>BMI calculator services</strong> and then start a new one with the following command:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=qps-flowcontrol-provider -Dcse.flowcontrol.Provider.qps.limit.gateway=1"</span>
+</code></pre></div></div>
+<p>or</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=qps-flowcontrol-provider -Dcse.flowcontrol.Provider.qps.limit.gateway=1"</span>
+</code></pre></div></div>
+
+<h2 id="verification">Verification</h2>
+
+<p>Visit <a>http://localhost:8889</a>. Input a positive height and weight and then click <em>Submit</em> button twice or more in less than one second. You will see the web page change from the left one to the right one.</p>
+
+<p><img src="/assets/images/flow-control-result.png" alt="Flow control result" class="align-center" /></p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>See quick start for <a href="/docs/quick-start-advance/service-management/">Service Management</a></p>
+  </li>
+  <li>
+    <p>Learn more about <a href="/users/service-configurations/#限流策略">Flow Control</a></p>
+  </li>
+</ul>
+
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+            <li><a href="/docs/quick-start-advance/" class="active">Advance microservice development</a></li>
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+            <li><a href="/docs/quick-start-advance/load-balance/" class="">Load Balance</a></li>
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+      
+        
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+            <h1 class="page__title" itemprop="headline">Advance microservice development
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>This guide shows how to reinforce microservices with <strong>ServiceComb</strong>'s handler chain. From here you can learn how to use ServiceComb's handler chain by the following links below:</p>
+
+<ul>
+  <li>
+    <p><a href="/docs/quick-start-advance/load-balance/">Load Balance</a>. Distribute requests equally among service instances.</p>
+  </li>
+  <li>
+    <p><a href="/docs/quick-start-advance/flow-control/">Flow Control</a>. Limit number of requests of a microservice.</p>
+  </li>
+  <li>
+    <p><a href="/docs/quick-start-advance/service-management">Service Management</a>. Isolate abnormal services and stop cascading failure in microservice application.</p>
+  </li>
+  <li>
+    <p><a href="/docs/quick-start-advance/distributed-tracing">Distributed Tracing</a>. Visualize the flow of requests through microservices.</p>
+  </li>
+</ul>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>See <a href="/users/">ServiceComb User Guide</a></p>
+  </li>
+  <li>
+    <p>Learn more from <a href="/docs/linuxcon-workshop-demo/">the Company application</a> for a more complete example of microservice applications integrated with ServiceComb</p>
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content/docs/quick-start-advance/load-balance/index.html

diff --git a/content/docs/quick-start-advance/load-balance/index.html b/content/docs/quick-start-advance/load-balance/index.html
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+    <meta itemprop="headline" content="Load Balance">
+    <meta itemprop="description" content="Introduce how to use load balance with ServiceComb in the BMI application">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Load Balance
+</h1>
+            
+          </header>
+        
+      
+
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
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+  <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+  <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
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+</aside>
+
+<p>When we scale up <em>BMI calculator service</em>, requests from <em>BMI web service</em> need to distribute equally to each <em>BMI calculator service</em>. This guide shows how to use load balance with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<p>The simple embedded load balancer will be used by default. No extra configurations needed.</p>
+
+<h2 id="verification">Verification</h2>
+
+<p>Run one more <em>BMI calculator service</em> with the following command:</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.rest.address=0.0.0.0:7778"</span>
+</code></pre></div></div>
+<p>or</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.rest.address=0.0.0.0:7778"</span>
+</code></pre></div></div>
+
+<p>To better distinguish different running instances, we added a new interface that returns instance id in the implementation of BMI calculator, details can refer to <a href="https://github.com/apache/servicecomb-java-chassis/tree/master/samples/bmi/calculator">the implementation of BMI calculator</a>. Besides, a different service port is needed to avoid port conflict.</p>
+
+<p>Now you can see the instance id in the following figures shows up alternately by clicking the <em>Submit</em> button.</p>
+
+<p><img src="/assets/images/load-balance-result.png" alt="Load balance result" class="align-center" /></p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>See quick start for <a href="/docs/quick-start-advance/flow-control/">Flow Control</a></p>
+  </li>
+  <li>
+    <p>Learn more about <a href="/users/service-configurations/#负载均衡策略">Load Balance</a></p>
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+    <meta itemprop="description" content="Introduce how to use service management with ServiceComb in the BMI application">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
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+      
+        
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+            <h1 class="page__title" itemprop="headline">Service Management
+</h1>
+            
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+        
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+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#before-you-start" id="markdown-toc-before-you-start">Before you start</a></li>
+  <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+  <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
+  <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
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+</aside>
+
+<p>Service management is mainly used to solve or ease avalanche effect of microservices. Abnormal microservices will be isolated and stop cascading failure to reduce unnecessary resource. This guide shows how to use service management with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<ol>
+  <li>
+    <p>Add service management dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI calculator service</em>:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>handler-bizkeeper<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Configure handler chain of service management and fallback strategy:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+  <span class="na">circuitBreaker</span><span class="pi">:</span>
+    <span class="na">Provider</span><span class="pi">:</span>
+      <span class="na">calculator</span><span class="pi">:</span>
+        <span class="na">requestVolumeThreshold</span><span class="pi">:</span> <span class="m">3</span>
+  <span class="na">fallbackpolicy</span><span class="pi">:</span>
+    <span class="na">Provider</span><span class="pi">:</span>
+      <span class="na">policy</span><span class="pi">:</span> <span class="s">returnnull</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p>The above configurations have already set up in the code. All you need to do is to restart the <em>BMI calculator services</em> with the following command:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 1.x</span>
+mvn spring-boot:run <span class="nt">-Drun</span>.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=bizkeeper-provider -Dcse.circuitBreaker.Provider.calculator.requestVolumeThreshold=3 -Dcse.fallbackpolicy.Provider.policy=returnnull"</span>
+</code></pre></div></div>
+<p>or</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c">#spring-boot-maven-plugin 2.x</span>
+mvn spring-boot:run <span class="nt">-Dspring-boot</span>.run.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=bizkeeper-provider -Dcse.circuitBreaker.Provider.calculator.requestVolumeThreshold=3 -Dcse.fallbackpolicy.Provider.policy=returnnull"</span>
+</code></pre></div></div>
+
+<h2 id="verification">Verification</h2>
+
+<ol>
+  <li>
+    <p>Circuit-break microservices. Visit <a>http://localhost:8889</a>, enter a negative height or weight and click the <em>Submit</em> button three times or more continuously. Then the web page should look like the left one in fig-1.</p>
+  </li>
+  <li>
+    <p>Verify serivces are in circuit-break status. Enter a positive height and weight, then click <em>Submit</em> button. The web page still looks like the left one in fig-1. In the meanwhile, no exceptions show in the log of <em>BMI calculator service</em>. Instead it shows lines contain “fallback called”.</p>
+  </li>
+  <li>
+    <p>Verify the service back online again. Wait for about 15 seconds, enter a positive height and weight, then click <em>Submit</em> button. You will see the service works fine again like the right one in fig-1.</p>
+  </li>
+</ol>
+
+<p class="figure-caption"><img src="/assets/images/service-management-result.png" alt="Service management result" class="align-center" />
+fig-1 Service management result</p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>See quick start for <a href="/docs/quick-start-advance/distributed-tracing/">Distributed Tracing</a></p>
+  </li>
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+    <meta itemprop="headline" content="Develop microservice application in minutes">
+    <meta itemprop="description" content="Introduce how to develop a microservice application using ServiceComb in minutes through the BMI sample">
+    
+    <meta itemprop="dateModified" content="September 06, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Develop microservice application in minutes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#before-you-begin" id="markdown-toc-before-you-begin">Before you begin</a></li>
+  <li><a href="#develop-bmi-microservice-application-in-minutes" id="markdown-toc-develop-bmi-microservice-application-in-minutes">Develop BMI microservice application in minutes</a>    <ul>
+      <li><a href="#implementation-of-calculator" id="markdown-toc-implementation-of-calculator">Implementation of calculator</a></li>
+      <li><a href="#implementation-of-webapp-service" id="markdown-toc-implementation-of-webapp-service">Implementation of webapp service</a></li>
+    </ul>
+  </li>
+  <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="before-you-begin">Before you begin</h2>
+<p>Walk through the instructions in the <a href="/docs/quick-start/">Quick Start</a>.</p>
+
+<h2 id="develop-bmi-microservice-application-in-minutes">Develop BMI microservice application in minutes</h2>
+<p>The workflow of BMI application have been introduced in <a href="/docs/quick-start/">Quick start</a>. It contains two separate microservices:</p>
+
+<ul>
+  <li>
+    <p><strong>BMI calculator service</strong>：provides computing services.</p>
+  </li>
+  <li>
+    <p><strong>Web service</strong>：provides both user interface and gateway service.</p>
+  </li>
+</ul>
+
+<p>Before we start, we need to add some common dependencies in the parent project of the services’.</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="o">&lt;</span><span class="n">dependencyManagement</span><span class="o">&gt;</span>
+    <span class="o">&lt;</span><span class="n">dependencies</span><span class="o">&gt;</span>
+      <span class="o">&lt;</span><span class="n">dependency</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">groupId</span><span class="o">&gt;</span><span class="n">org</span><span class="o">.</span><span class="na">apache</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">&lt;/</span><span class="n">groupId</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">artifactId</span><span class="o">&gt;</span><span class="n">java</span><span class="o">-</span><span class="n">chassis</span><span class="o">-</span><span class="n">dependencies</span><span class="o">&lt;/</span><span class="n">artifactId</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">version</span><span class="o">&gt;</span><span class="mf">1.0</span><span class="o">.</span><span class="mi">0</span><span class="o">-</span><span class="n">m1</span><span class="o">&lt;/</span><span class="n">version</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">type</span><span class="o">&gt;</span><span class="n">pom</span><span class="o">&lt;/</span><span class="n">type</span><span class="o">&gt;</span>
+        <span class="o">&lt;</span><span class="n">scope</span><span class="o">&gt;</span><span class="kn">import</span><span class="err">&lt;/</span><span class="nn">scope</span><span class="o">&gt;</span>
+      <span class="o">&lt;/</span><span class="n">dependency</span><span class="o">&gt;</span>
+    <span class="o">&lt;/</span><span class="n">dependencies</span><span class="o">&gt;</span>
+  <span class="o">&lt;/</span><span class="n">dependencyManagement</span><span class="o">&gt;</span>
+
+  <span class="o">&lt;</span><span class="n">dependencies</span><span class="o">&gt;</span>
+    <span class="o">&lt;</span><span class="n">dependency</span><span class="o">&gt;</span>
+      <span class="o">&lt;</span><span class="n">groupId</span><span class="o">&gt;</span><span class="n">org</span><span class="o">.</span><span class="na">hibernate</span><span class="o">&lt;/</span><span class="n">groupId</span><span class="o">&gt;</span>
+      <span class="o">&lt;</span><span class="n">artifactId</span><span class="o">&gt;</span><span class="n">hibernate</span><span class="o">-</span><span class="n">validator</span><span class="o">&lt;/</span><span class="n">artifactId</span><span class="o">&gt;</span>
+    <span class="o">&lt;/</span><span class="n">dependency</span><span class="o">&gt;</span>
+  <span class="o">&lt;/</span><span class="n">dependencies</span><span class="o">&gt;</span>
+</code></pre></div></div>
+<p><strong>Notice</strong>: The <code class="highlighter-rouge">java-chassis-dependencies</code> is imported as pom to unify version management of dependencies.</p>
+
+<p>Now we will introduce the detailed implementation of these two microservices. The full code is on <a href="https://github.com/apache/servicecomb-java-chassis/tree/master/samples/bmi">github</a>.</p>
+<h3 id="implementation-of-calculator">Implementation of calculator</h3>
+<p>The calculator service provides capability of calculating BMI. It contains three parts:</p>
+
+<ul>
+  <li>
+    <p>Detailed calculation implementation</p>
+  </li>
+  <li>
+    <p>Service endpoint definition</p>
+  </li>
+  <li>
+    <p>Service startup entry</p>
+  </li>
+</ul>
+
+<h4 id="detailed-calculation-implementation">Detailed calculation implementation</h4>
+<p>Implement detailed calculation according to the formula \(BMI=\frac{weight}{height^2}\).</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">CalculatorService</span> <span class="o">{</span>
+  <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">);</span>
+<span class="o">}</span>
+
+<span class="nd">@Service</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorServiceImpl</span> <span class="kd">implements</span> <span class="nc">CalculatorService</span> <span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">height</span> <span class="o">&lt;=</span> <span class="mi">0</span> <span class="o">||</span> <span class="n">weight</span> <span class="o">&lt;=</span> <span class="mi">0</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">throw</span> <span class="k">new</span> <span class="nf">IllegalArgumentException</span><span class="o">(</span><span class="s">"Arguments must be above 0"</span><span class="o">);</span>
+    <span class="o">}</span>
+    <span class="kt">double</span> <span class="n">heightInMeter</span> <span class="o">=</span> <span class="n">height</span> <span class="o">/</span> <span class="mi">100</span><span class="o">;</span>
+    <span class="k">return</span> <span class="n">weight</span> <span class="o">/</span> <span class="o">(</span><span class="n">heightInMeter</span> <span class="o">*</span> <span class="n">heightInMeter</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h4 id="service-endpoint-definition">Service endpoint definition</h4>
+<p>Service endpoint is defined to generate service contract. First of all, define the endpoint interface:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">CalculatorEndpoint</span> <span class="o">{</span>
+  <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+<p>Introduce ServiceComb dependency:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>Expose calculator service’s restful endpoint:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"calculatorRestEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorRestEndpoint</span> <span class="kd">implements</span> <span class="nc">CalculatorEndpoint</span> <span class="o">{</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">CalculatorService</span> <span class="n">calculatorService</span><span class="o">;</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="kd">public</span> <span class="nf">CalculatorRestEndpoint</span><span class="o">(</span><span class="nc">CalculatorService</span> <span class="n">calculatorService</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">calculatorService</span> <span class="o">=</span> <span class="n">calculatorService</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="nd">@GetMapping</span><span class="o">(</span><span class="s">"/bmi"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">double</span> <span class="nf">calculate</span><span class="o">(</span><span class="kt">double</span> <span class="n">height</span><span class="o">,</span> <span class="kt">double</span> <span class="n">weight</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">calculatorService</span><span class="o">.</span><span class="na">calculate</span><span class="o">(</span><span class="n">height</span><span class="o">,</span> <span class="n">weight</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p class="notice--info">ServiceComb supports SpringMvc simplified annotations, e.g. <code class="highlighter-rouge">GetMapping</code>, since version 0.3.0.</p>
+
+<p>Note that ServiceComb can auto-generate service contract when annotating endpoints with <code class="highlighter-rouge">@RestSchema</code>. Then configure the endpoint in  <code class="highlighter-rouge">microservice.yaml</code> as follows to register the contract and microservice to service center.</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">bmi</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">calculator</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7777</span>
+</code></pre></div></div>
+
+<h4 id="service-startup-entry">Service startup entry</h4>
+<p>Enable <em>ServiceComb</em> microservice framework by adding <code class="highlighter-rouge">@EnableServiceComb</code> annotation.</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalculatorApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">CalculatorApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="implementation-of-webapp-service">Implementation of webapp service</h3>
+<p>The web service provides both the user interface and gateway service. It contains three parts:</p>
+
+<ul>
+  <li>
+    <p>User interface</p>
+  </li>
+  <li>
+    <p>Gateway and routing rules</p>
+  </li>
+  <li>
+    <p>Service startup entry</p>
+  </li>
+</ul>
+
+<p>The user interface was developed using <a href="http://getbootstrap.com/">Bootstrap</a>.</p>
+
+<h4 id="gateway-and-routing-rules">Gateway and routing rules</h4>
+<p>The gateway service was implemented using the <a href="https://github.com/Netflix/zuul/wiki">Netflix Zuul</a>.</p>
+
+<p>Introduce ServiceComb dependency:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-servicecomb<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p class="notice--info">ServiceComb added <code class="highlighter-rouge">spring-cloud-zuul</code> module to provide better compatibility with zuul since version 0.4.0-SNAPSHOT.</p>
+
+<p>Configure routing rules and service endpoint in <code class="highlighter-rouge">application.yaml</code>.</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">zuul</span><span class="pi">:</span>
+  <span class="na">routes</span><span class="pi">:</span>
+    <span class="na">calculator</span><span class="pi">:</span> <span class="s">/calculator/**</span>
+
+<span class="c1"># disable netflix eureka since it's not used for service discovery</span>
+<span class="na">ribbon</span><span class="pi">:</span>
+  <span class="na">eureka</span><span class="pi">:</span>
+    <span class="na">enabled</span><span class="pi">:</span> <span class="no">false</span>
+
+<span class="na">server</span><span class="pi">:</span>
+  <span class="na">port</span><span class="pi">:</span> <span class="m">8889</span>
+</code></pre></div></div>
+<p>Enable service discovery with zuul by putting the application information and service center address in <code class="highlighter-rouge">microservice.yaml</code>.</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">bmi</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">gateway</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+</code></pre></div></div>
+<h4 id="service-startup-entry-1">Service startup entry</h4>
+<p>Add annotations to enable <code class="highlighter-rouge">ServiceComb</code> and <code class="highlighter-rouge">Zuul</code>:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableZuulProxy</span>
+<span class="nd">@EnableServiceComb</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">GatewayApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">GatewayApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>Now you can refer to <a href="/docs/quick-start/#Run microservice application">quick start</a> to verify the services.</p>
+
+<h2 id="whats-next">What’s next</h2>
+
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+            <li><a href="/docs/mesher-quick-start-advance/mesher-flow-control/" class="">mesher Flow Control</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/mesher-service-management/" class="">mesher Service Management</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/mesher-quick-start-advance/mesher-distributed-tracing/" class="">mesher Distributed Tracing</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">A contract-based microservice development toolkit</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/toolkit/quick-start/" class="">Quick Start</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/toolkit/oas-validator/" class="">OpenAPI V3 Spec validation tools</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">A multiple servicecenters synchronization tool</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/syncer/quick-start/" class="">Quick Start</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/syncer/multi-servicecenters/" class="">Different service centers communicate with each other</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Data consistency solution">
+    <meta itemprop="description" content="Introduce how to use Saga data consistency solution provided by ServiceComb">
+    
+    <meta itemprop="dateModified" content="September 03, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Data consistency solution
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#running-demo" id="markdown-toc-running-demo">Running Demo</a></li>
+  <li><a href="#verify-services" id="markdown-toc-verify-services">Verify services</a></li>
+  <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>This demo shows you how to use the Saga solution provided by ServiceComb to ensure the microservice for data consistency.</p>
+
+<p>With microservice architecture, each of the services may have its own database technology and it’s not feasible to ensure all transactions on these services are either committed or rolled back with database. In this demo, we make use of Saga to ensure eventual data consistency among services, the payment is only executed after car rental, flight booking, and hotel-reservation are completed.</p>
+
+<p>Travel application demo including four services</p>
+<ul>
+  <li>flight booking service</li>
+  <li>car rental service</li>
+  <li>hotel reservation service</li>
+  <li>payment service</li>
+</ul>
+
+<p><img src="/assets/images/saga-demo.png" alt="Saga-demo" /></p>
+
+<h2 id="running-demo">Running Demo</h2>
+
+<p>Note, demo is in the <a href="https://github.com/apache/servicecomb-saga">ServiceComb-Saga</a> project.</p>
+
+<ol>
+  <li>Prerequisites
+    <ul>
+      <li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">Oracle JDK 1.8</a></li>
+      <li><a href="https://maven.apache.org/install.html">Maven 3.x</a></li>
+      <li><a href="https://www.docker.com/get-docker">Docker</a></li>
+      <li><a href="https://dev.mysql.com/downloads/">MySQL</a></li>
+      <li><a href="https://github.com/apache/servicecomb-service-center">Service Center</a></li>
+      <li><a href="https://docs.docker.com/compose/install/">Docker compose</a></li>
+    </ul>
+  </li>
+  <li>
+    <p>Configuration
+ Set service center address of each microservice in <em>microservice.yaml</em> file</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">saga</span>
+ <span class="na">service_description</span><span class="pi">:</span>
+   <span class="na">name</span><span class="pi">:</span> <span class="s">flight-booking-service</span>
+   <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+ <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">http://sc.servicecomb.io:30100</span> <span class="c1">#choose Service Center provided by ServiceComb</span>
+   <span class="na">rest</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+   <span class="na">handler</span><span class="pi">:</span>
+     <span class="na">chain</span><span class="pi">:</span>
+       <span class="na">Consumer</span><span class="pi">:</span>
+         <span class="na">default</span><span class="pi">:</span> <span class="s">loadbalance</span>
+</code></pre></div>    </div>
+
+    <p>Set deployment script in <em>saga-demo/docker-compose.yaml</em> file</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">version</span><span class="pi">:</span> <span class="s1">'</span><span class="s">2.1'</span>
+
+ <span class="na">services</span><span class="pi">:</span>
+   <span class="na">service-center</span><span class="pi">:</span> <span class="c1">#choose Service Center image provided by ServiceComb</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">servicecomb/service-center"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">service-center</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">30100:30100"</span>
+
+   <span class="na">mysql</span><span class="pi">:</span>  <span class="c1">#choose mysql image with 5.7 version</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">mysql/mysql-server:5.7"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">mysql</span>
+     <span class="na">environment</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s">MYSQL_ROOT_PASSWORD=password</span>
+       <span class="pi">-</span> <span class="s">MYSQL_DATABASE=saga</span>
+       <span class="pi">-</span> <span class="s">MYSQL_USER=saga</span>
+       <span class="pi">-</span> <span class="s">MYSQL_PASSWORD=password</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">3306:3306"</span>
+     <span class="na">healthcheck</span><span class="pi">:</span>
+         <span class="na">test</span><span class="pi">:</span> <span class="pi">[</span><span class="s2">"</span><span class="s">CMD-SHELL"</span><span class="pi">,</span> <span class="s2">"</span><span class="s">nc</span><span class="nv"> </span><span class="s">-z</span><span class="nv"> </span><span class="s">localhost</span><span class="nv"> </span><span class="s">3306</span><span class="nv"> </span><span class="s">&amp;&gt;</span><span class="nv"> </span><span class="s">/dev/null;</span><span class="nv"> </span><span class="s">echo</span><span class="nv"> </span><span class="s">$$?"</span><span class="pi">]</span>
+         <span class="na">interval</span><span class="pi">:</span> <span class="s">30s</span>
+         <span class="na">timeout</span><span class="pi">:</span> <span class="s">10s</span>
+         <span class="na">retries</span><span class="pi">:</span> <span class="m">5</span>
+
+   <span class="na">car-rental-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">car-rental-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">car</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8080:8080"</span>
+
+   <span class="na">flight-booking-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">flight-booking-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">flight</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8081:8080"</span>
+
+   <span class="na">hotel-reservation-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">hotel-reservation-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">hotel</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8082:8080"</span>
+
+   <span class="na">payment-service</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">payment-service:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">payment</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8080"</span>
+
+   <span class="na">saga</span><span class="pi">:</span>
+     <span class="na">image</span><span class="pi">:</span> <span class="s2">"</span><span class="s">saga-spring:0.0.2-SNAPSHOT"</span>
+     <span class="na">hostname</span><span class="pi">:</span> <span class="s">saga</span>
+     <span class="na">links</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">mysql:mysql.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">service-center:sc.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">car-rental-service:car.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">flight-booking-service:flight.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">hotel-reservation-service:hotel.servicecomb.io"</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">payment-service:payment.servicecomb.io"</span>
+     <span class="na">environment</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s">JAVA_OPTS=-Dspring.profiles.active=prd,servicecomb -Dcse.service.registry.address=http://sc.servicecomb.io:30100</span>
+     <span class="na">ports</span><span class="pi">:</span>
+       <span class="pi">-</span> <span class="s2">"</span><span class="s">8083:8080"</span>
+     <span class="na">depends_on</span><span class="pi">:</span>
+       <span class="na">mysql</span><span class="pi">:</span>
+         <span class="na">condition</span><span class="pi">:</span> <span class="s">service_healthy</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Run the following command to create docker images in saga project root folder</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> mvn package <span class="nt">-DskipTests</span> <span class="nt">-Pdocker</span> <span class="nt">-Pdemo</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Start application up in saga/saga-demo/ with the following command</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> docker-compose up
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="verify-services">Verify services</h2>
+
+<ol>
+  <li>
+    <p>Use <a href="https://github.com/apache/servicecomb-saga/blob/master/docs/api/api.md">Saga API</a> to set request content and save it to <em>request.json</em></p>
+
+    <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="w"> </span><span class="p">{</span><span class="w">
+   </span><span class="nl">"policy"</span><span class="p">:</span><span class="w"> </span><span class="s2">"BackwardRecovery"</span><span class="p">,</span><span class="w">
+   </span><span class="nl">"requests"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-car"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"car-rental-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/rentals"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/rentals"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">},</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-hotel"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"hotel-reservation-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/reservations"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/reservations"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">},</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-flight"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"flight-booking-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/bookings"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/bookings"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">},</span><span class="w">
+     </span><span class="p">{</span><span class="w">
+       </span><span class="nl">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"request-payment"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"rest"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"serviceName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"payment-service"</span><span class="p">,</span><span class="w">
+       </span><span class="nl">"parents"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+         </span><span class="s2">"request-car"</span><span class="p">,</span><span class="w">
+         </span><span class="s2">"request-flight"</span><span class="p">,</span><span class="w">
+         </span><span class="s2">"request-hotel"</span><span class="w">
+       </span><span class="p">],</span><span class="w">
+       </span><span class="nl">"transaction"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"post"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/payments"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">},</span><span class="w">
+       </span><span class="nl">"compensation"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+         </span><span class="nl">"method"</span><span class="p">:</span><span class="w"> </span><span class="s2">"put"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"path"</span><span class="p">:</span><span class="w"> </span><span class="s2">"/payments"</span><span class="p">,</span><span class="w">
+         </span><span class="nl">"params"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+           </span><span class="nl">"form"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+             </span><span class="nl">"customerId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mike"</span><span class="w">
+           </span><span class="p">}</span><span class="w">
+         </span><span class="p">}</span><span class="w">
+       </span><span class="p">}</span><span class="w">
+     </span><span class="p">}</span><span class="w">
+   </span><span class="p">]</span><span class="w">
+ </span><span class="p">}</span><span class="w">
+</span></code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Set content type to <em>text/plain</em>, and send <em>request.json</em> to Saga</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> curl <span class="nt">-XPOST</span> <span class="nt">-H</span> <span class="s2">"Content-Type: text/plain"</span> <span class="nt">-d</span> @./request.json  http://&lt;localhost.ip:8083&gt;/requests
+</code></pre></div>    </div>
+
+    <p>Response(return “success” if execution successfully, otherwise return failed with error info)</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> success
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Get all the Saga events</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> curl <span class="nt">-XGET</span> http://&lt;localhost.ip:8083&gt;/events
+</code></pre></div>    </div>
+
+    <p>Response</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o">{</span>
+     <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>: <span class="o">[</span>
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 1,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">policy</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">BackwardRecovery</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">requests</span><span class="se">\"</span><span class="s2">: [{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}]}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 2,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 3,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 4,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:21Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 5,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:22Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Flight booked with id f249543b-765e-4e10-9ba3-74fe33d8af83 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 6,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:24Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Hotel reserved with id f74049a0-3d3d-49b6-a45b-058a409daecf for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 7,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Car rented with id 937d7364-be07-4d47-9e01-af72290d0478 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 8,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 9,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Payment made for customer mike and remaining balance is 200</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 10,
+             <span class="s2">"sagaId"</span>: <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:25Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{}"</span>
+         <span class="o">}</span>
+ 	<span class="o">]</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Sending the request more than once will trigger compensation due to insufficient account balance in payment-service.Do this implement and get Saga events, you can find compensation events in Saga log.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o">{</span>
+     <span class="s2">"bcd27f0d-6b82-49b3-8067-b16eba970e55"</span>: <span class="o">[</span>
+         ...
+     <span class="o">]</span>,
+     <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>: <span class="o">[</span>
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 11,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">policy</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">BackwardRecovery</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">requests</span><span class="se">\"</span><span class="s2">: [{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}, {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}}]}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 12,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 13,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 14,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 15,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Car rented with id 75f4be4b-0d32-4bbb-b786-7b39c340682a for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 16,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Hotel reserved with id 7ad11c00-25eb-4b4b-b1fb-b55d4e833f51 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 17,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Flight booked with id 1a40d7bf-ee66-46d1-b066-a9973f15176a for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 18,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:30:45Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionStartedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 19,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionAbortedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-payment</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [</span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">payment-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/payments</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">body</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">org.apache.servicecomb.saga.core.TransactionFailedException: The remote service payment-service failed to serve the post request to /payments </span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.discovery.service.center.ServiceCenterDiscoveryRestTransport.with(ServiceCenterDiscoveryRestTransport.java:81)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.format.JacksonRestOperation.send(JacksonRestOperation.java:43)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.format.JacksonRestTransaction.send(JacksonRestTransaction.java:24)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.RequestProcessTask.commit(RequestProcessTask.java:45)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.BackwardRecovery.apply(BackwardRecovery.java:33)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.LoggingRecoveryPolicy.apply(LoggingRecoveryPolicy.java:38)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.TransactionTaskConsumer</span><span class="nv">$OperationCallable</span><span class="s2">.call(TransactionTaskConsumer.java:110)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.saga.core.TransactionTaskConsumer</span><span class="nv">$OperationCallable</span><span class="s2">.call(TransactionTaskConsumer.java:94)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.FutureTask.run(FutureTask.java:266)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.Executors</span><span class="nv">$RunnableAdapter</span><span class="s2">.call(Executors.java:511)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.FutureTask.run(FutureTask.java:266)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.util.concurrent.ThreadPoolExecutor</span><span class="nv">$Worker</span><span class="s2">.run(ThreadPoolExecutor.java:617)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat java.lang.Thread.run(Thread.java:748)</span><span class="se">\\</span><span class="s2">nCaused by: InvocationException: code=490;msg=CommonExceptionData [message=Cse Internal Bad Request]</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.exception.ExceptionFactory.doCreate(ExceptionFactory.java:74)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.exception.ExceptionFactory.convertException(ExceptionFactory.java:119)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.exception.ExceptionFactory.convertConsumerException(ExceptionFactory.java:78)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.Response.createConsumerFail(Response.java:128)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.Response.createFail(Response.java:121)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.swagger.invocation.AsyncResponse.fail(AsyncResponse.java:41)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat org.apache.servicecomb.transport.rest.client.http.VertxHttpMethod.lambda</span><span class="nv">$doMethod$0</span><span class="s2">(VertxHttpMethod.java:67)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.handleException(HttpClientRequestBase.java:110)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestImpl.handleException(HttpClientRequestImpl.java:50)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.timeout(HttpClientRequestBase.java:155)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.handleTimeout(HttpClientRequestBase.java:140)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.http.impl.HttpClientRequestBase.lambda</span><span class="nv">$setTimeout$0</span><span class="s2">(HttpClientRequestBase.java:100)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.impl.VertxImpl</span><span class="nv">$InternalTimerHandler</span><span class="s2">.handle(VertxImpl.java:782)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.impl.VertxImpl</span><span class="nv">$InternalTimerHandler</span><span class="s2">.handle(VertxImpl.java:753)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.vertx.core.impl.ContextImpl.lambda</span><span class="nv">$wrapTask$2</span><span class="s2">(ContextImpl.java:316)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:418)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:440)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">tat io.netty.util.concurrent.SingleThreadEventExecutor</span><span class="nv">$5</span><span class="s2">.run(SingleThreadEventExecutor.java:873)</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">t... 1 more</span><span class="se">\\</span><span class="s2">nCaused by: java.util.concurrent.TimeoutException: The timeout period of 30000ms has been exceeded</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\</span><span class="s2">t... 11 more</span><span class="se">\\</span><span class="s2">n</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 20,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionCompensatedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-car</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">car-rental-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/rentals</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Car rental cancelled with id 38bc5913-6768-4321-add3-6d26db364c19 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 21,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionCompensatedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-hotel</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">hotel-reservation-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/reservations</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Hotel reservation cancelled with id efcff718-fb74-4b70-a2e2-689ecb42206d for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 22,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"TransactionCompensatedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{</span><span class="se">\"</span><span class="s2">request</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">id</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">request-flight</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">rest</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">parents</span><span class="se">\"</span><span class="s2">: [], </span><span class="se">\"</span><span class="s2">fallback</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">type</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">NOP</span><span class="se">\"</span><span class="s2">}, </span><span class="se">\"</span><span class="s2">serviceName</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">flight-booking-service</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">transaction</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">post</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}}, </span><span class="se">\"</span><span class="s2">compensation</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">path</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">/bookings</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">method</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">put</span><span class="se">\"</span><span class="s2">, </span><span class="se">\"</span><span class="s2">params</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">form</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">customerId</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">mike</span><span class="se">\"</span><span class="s2">}}, </span><span class="se">\"</span><span class="s2">retries</span><span class="se">\"</span><span class="s2">: 3}}, </span><span class="se">\"</span><span class="s2">response</span><span class="se">\"</span><span class="s2">: {</span><span class="se">\"</span><span class="s2">body</span><span class="se">\"</span><span class="s2">: </span><span class="se">\"</span><span class="s2">{</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">statusCode</span><span class="se">\\\"</span><span class="s2">: 200,</span><span class="se">\\</span><span class="s2">n  </span><span class="se">\\\"</span><span class="s2">content</span><span class="se">\\\"</span><span class="s2">: </span><span class="se">\\\"</span><span class="s2">Flight booking cancelled with id 37572464-6f53-4351-aa37-5f88e3f1f872 for customer mike</span><span class="se">\\\"\\</span><span class="s2">n}</span><span class="se">\"</span><span class="s2">}}"</span>
+         <span class="o">}</span>,
+         <span class="o">{</span>
+             <span class="s2">"id"</span>: 23,
+             <span class="s2">"sagaId"</span>: <span class="s2">"2654fa50-71e2-4fc8-afc2-6a5e0d3dafe9"</span>,
+             <span class="s2">"creationTime"</span>: <span class="s2">"2017-09-20T00:31:15Z"</span>,
+             <span class="s2">"type"</span>: <span class="s2">"SagaEndedEvent"</span>,
+             <span class="s2">"contentJson"</span>: <span class="s2">"{}"</span>
+         <span class="o">}</span>
+     <span class="o">]</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>
+    <p>Learn more from <a href="/docs/distributed_saga_1/">Eventual Data Consistency Solution in ServiceComb - part 1</a></p>
+  </li>
+  <li>
+    <p>Learn more from <a href="/docs/distributed_saga_2/">Eventual Data Consistency Solution in ServiceComb - part 2</a></p>
+  </li>
+  <li>
+    <p>Learn more from <a href="/docs/distributed_saga_3/">Eventual Data Consistency Solution in ServiceComb - part 3</a></p>
+  </li>
+</ul>
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+            
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+            
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+            <li><a href="/docs/quick-start-bmi/" class="">Develop microservice application in minutes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/quick-start-advance/" class="">Advance microservice development</a></li>
+          
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+            
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+            <li><a href="/docs/quick-start-advance/load-balance/" class="">Load Balance</a></li>
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+    <meta itemprop="headline" content="Get started">
+    <meta itemprop="description" content="Introduce how to run microservice applications using ServiceComb">
+    
+    <meta itemprop="dateModified" content="September 06, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Get started
+</h1>
+            
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+        
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#install-java-development-environment" id="markdown-toc-install-java-development-environment">Install Java development environment</a></li>
+  <li><a href="#run-service-center" id="markdown-toc-run-service-center">Run Service Center</a></li>
+  <li><a href="#create-your-first-microservice-application" id="markdown-toc-create-your-first-microservice-application">Create your first microservice application</a></li>
+  <li><a href="#run-microservice-application" id="markdown-toc-run-microservice-application">Run microservice application</a></li>
+  <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="install-java-development-environment">Install Java development environment</h2>
+
+<ul>
+  <li>
+    <p>Install Git, details can refer to <a href="https://git-scm.com/book/en/v2/Getting-Started-Installing-Git" target="_blank">Git Installing Guide</a>.</p>
+  </li>
+  <li>
+    <p>Install JDK 1.8, details can refer to <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">JDK Installing Guide</a>.</p>
+  </li>
+  <li>
+    <p>Install Maven 3.x, details can refer to <a href="https://maven.apache.org/install.html" target="_blank">Maven Installing Guide</a>.</p>
+  </li>
+  <li>
+    <p>Download ServiceComb-Samples.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> git clone https://github.com/apache/servicecomb-samples.git
+ <span class="nb">cd </span>servicecomb-samples/java-chassis-samples/bmi
+ mvn clean <span class="nb">install</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="run-service-center">Run Service Center</h2>
+<p><strong>Service Center</strong> enables capabilities of service registration and service discovery in <strong>ServiceComb</strong>. It can run inside docker.</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest
+</code></pre></div></div>
+<p><em>Reference to <a href="/docs/service-center/install/">Install of ServiceCenter</a> to learn deploying Service Center as a local binary.</em></p>
+
+<h2 id="create-your-first-microservice-application">Create your first microservice application</h2>
+<p>Let's start the journey of microservice with a simple <strong>Body Mass Index(BMI)</strong> application. The <a href="https://en.wikipedia.org/wiki/Body_mass_index" target="_blank">BMI</a> is an attempt to quantify the amount of tissue mass in an individual. This application contains two separate microservices:</p>
+
+<ul>
+  <li>
+    <p><strong>BMI calculator service</strong>：A microservice provides calculation of BMI.</p>
+  </li>
+  <li>
+    <p><strong>Web service</strong>：A microservice provides both user interface and gateway service.</p>
+  </li>
+</ul>
+
+<p>The workflow of the application is shown as follows:<br />
+<img src="/assets/images/quick-start-sample-workflow-en.png" alt="workflow of BMI" class="align-center" /></p>
+
+<p>Note that the dotted lines indicate the process of service registration and discovery.</p>
+
+<h2 id="run-microservice-application">Run microservice application</h2>
+
+<ol>
+  <li>
+    <p>Enter BMI codes directory.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd </span>servicecomb-samples/java-chassis-samples/bmi
+</code></pre></div>    </div>
+
+    <p><strong>Note</strong>: In windows development environment, the docker runs inside the virtual machine. The IP address of <strong>Service Center</strong> needs to be modified as the virtual machine's IP address. Modify the 2 configuration files [calculator|webapp]/src/main/resources/microservice.yaml, changed <a>http://127.0.0.1:30100</a> to <a>http://192.168.99.100:30100</a> , where 192.168.99.100 is the virtual machine's IP address.</p>
+  </li>
+  <li>
+    <p>Run microservices.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd </span>calculator<span class="p">;</span> mvn spring-boot:run
+<span class="nb">cd </span>webapp<span class="p">;</span> mvn spring-boot:run
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Verify the application. Visit <a>http://localhost:8889</a> in browser. Then input your height and weight to verify.</p>
+
+    <p><img src="/assets/images/bmi-interface.png" alt="BMI user interface" class="align-center" /></p>
+  </li>
+</ol>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+  <li>Learn how to <a href="/docs/quick-start-bmi/">develop microservice application in minutes</a>.</li>
+</ul>
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+    <meta itemprop="headline" content="[Milestone] Apache ServiceComb (incubating) Release Version 1.0.0">
+    <meta itemprop="description" content="Apache ServiceComb (incubating) enters new stage">
+    <meta itemprop="datePublished" content="August 20, 2018">
+    <meta itemprop="dateModified" content="June 14, 2018">
+
+    <div class="page__inner-wrap">
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+          <header>
+            <h1 class="page__title" itemprop="headline">[Milestone] Apache ServiceComb (incubating) Release Version 1.0.0
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>​	Recently,  the Apache Foundation Incubation Project - Apache ServiceComb (incubating) officially released its  1.0.0 version  through community voting. The release this time includes Apache ServiceComb Java-Chassis (hereinafter referred to as Java-chassis) and Apache ServiceComb ServiceCenter (hereinafter referred to as ServiceCenter).</p>
+
+<p>​	ServiceComb has entered the Apache Foundation since December 2017, and version 1.0.0-m1 released in March 2018  , 1.0.0-m2 in  June 2018 . Now in August 2018, the milestone of release -1.0.0  was completed.</p>
+
+<p>​	 At present, 10+ companies have used ServiceComb for commercial use, the ServiceComb team has already participated in 10+ Meetups to give a speech. Besides, the ServiceComb community also  held 3 Meetups. The release of version 1.0.0 this time means that the ServiceComb version has officially entered a stable state on the premise of meeting the requirements of the Apache Software Foundation. The main new features and enhancements of ServiceComb Java-chassis and Service-center after entering the Apache Foundation incubation are as follows:</p>
+
+<h2 id="java-chassis">Java-chassis</h2>
+
+<ul>
+  <li>New Metrics module; Added a large number of monitoring indicators; Support Prometheus integration</li>
+  <li>Re-org the configuration center, support docking Ctrip Apollo as a configuration center, and easily extend the docking of other three-party configuration centers</li>
+  <li>The POJO programming model allows users to use CompletableFuture asynchronous programming</li>
+  <li>The POJO programming model allows users to use Object and Generic types as invoke parameters</li>
+  <li>Upgrade Zipkin to Zipkin2, and support both v1 and v2 versions of Zipkin server</li>
+  <li>Micro-service communication provides file stream capability and supports multimedia scenes such as music and pictures</li>
+  <li>Added support for API level QPS control based on service level QPS control;</li>
+  <li>Now we support using <code class="highlighter-rouge">servicecomb.flowcontrol.Consumer.qps.limit.[ServiceName].[Schema].[operation]</code> to config the API level QPS control</li>
+  <li>Added  <code class="highlighter-rouge">scaffold</code> and <a href="http://start.servicecomb.io">start.servicecomb.io</a> to allow users quickly build projects and provide complete out-of-the-box capabilities
+    <ul>
+      <li> Now create a ServiceComb microservice can be quickly built by Apache Maven Archetype. For more details, please refer to <a href="https://github.com/apache/incubator-servicecomb-java-chassis/blob/master/archetypes/README.md">ServiceComb Java Chassis Archetypes</a> , or you can directly access <a href="http://start.servicecomb.io">start.servicecomb.io</a>  to use the  <code class="highlighter-rouge">SPRING INITIALIZR UI</code> intergated by ServiceComb .</li>
+    </ul>
+  </li>
+  <li>Added a demonstration of how to build a ServiceComb project using <code class="highlighter-rouge">Gradle</code>
+    <ul>
+      <li>We added the Gradle configuration to the <a href="https://github.com/apache/incubator-servicecomb-java-chassis/tree/master/samples/bmi">BMI</a> project</li>
+    </ul>
+  </li>
+  <li>
+    <p>Asynchronous programming model supports <code class="highlighter-rouge">AsycRestTemplate</code></p>
+  </li>
+  <li>
+    <p>Added support for the <code class="highlighter-rouge">http/2</code> protocol</p>
+  </li>
+  <li>
+    <p>Implemented error injection interface that allows constructing an exception scenario by intercepting a service request. For example, setting the delay and error of a request to a specified microservice and its triggering probability</p>
+  </li>
+  <li>
+    <p>Added service Dev running mode, support contract dynamic modification when Dev mode is enabled</p>
+  </li>
+  <li>
+    <p>Implemented graceful downtime, anti-registration when the service is closed, ensuring that the accepted request is completed and the resources are fully released</p>
+  </li>
+  <li>
+    <p>Extend the micro-service public-private key authentication mechanism and add the  blacklist and whitelist function</p>
+
+    <ul>
+      <li>ServiceCenter has already support control the registration of microservices through blacklist and whitelist. However, since microservices are directly connected to each other, the microservices themselves need to have independent blacklist and whitelist authentication.</li>
+    </ul>
+  </li>
+  <li>
+    <p>Support Cross-Origin Resource Sharing (CORS);</p>
+
+    <ul>
+      <li>For example, Ajax can directly access microservices.</li>
+    </ul>
+  </li>
+  <li>
+    <p>Expanded the Access Log mechanism of Rest Endpoint</p>
+
+    <ul>
+      <li>Previously users could only set the Access Log’s Pattern. Now users can further customize the Access Log Item.</li>
+    </ul>
+  </li>
+  <li>
+    <p>The SpringMVC programming model now also supports class objects as arguments</p>
+
+    <ul>
+      <li>Users can use class objects as parameters, for example：</li>
+    </ul>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">"/address"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="nc">String</span> <span class="nf">address</span><span class="o">(</span><span class="nc">Address</span> <span class="n">address</span><span class="o">)</span> <span class="o">{</span> <span class="o">...</span> <span class="o">}</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">Address</span> <span class="o">{</span>
+	<span class="nc">String</span> <span class="n">country</span><span class="o">;</span>
+	<span class="nc">String</span> <span class="n">city</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p> will be automatically converted to<code class="highlighter-rouge">/address?city={city}&amp;country={country}</code></p>
+  </li>
+  <li>
+    <p>Microservices deployed in web containers such as Tomcat, now support access path request services in conjunction with context path and servlet pattern</p>
+
+    <ul>
+      <li>For example,if  the calling path is<code class="highlighter-rouge">cse://service/a/b...</code>，can also  access via <code class="highlighter-rouge">cse://service/{context path}/{servlet pattern}/a/b...</code> after deployed in web containers such as Tomcat</li>
+    </ul>
+  </li>
+  <li>
+    <p>Automatically scan the package of the <code class="highlighter-rouge">main</code> function to simplify user configuration</p>
+  </li>
+  <li>
+    <p>Provides a client ping mechanism that can detect if a client cache instance is available through ping extension. This feature is enabled by default, and the instance isolation function is used to isolate instances that fail to detect</p>
+  </li>
+  <li>When the microservices are downgraded or the instance is isolated, the corresponding event will be triggered, which facilitates third-party integration (reporting)</li>
+</ul>
+
+<h2 id="service-center">Service-center</h2>
+
+<ul>
+  <li>In total 3 releases has been done till date after incubation of Service-Center in Apache.</li>
+  <li>With every release there has been a significant addition of features and improvements.(like PACT Broker, Async Rest Template, Log Rotation, ipv6 support, Backend Store extension, Schema Testing, Self Discovery from Consumer )</li>
+  <li>With each release the stability of the Service-Center increased as more and more bugs were fixed.</li>
+  <li>Performance has increased significantly as lot of API’s were optimized related to Service Discovery.</li>
+  <li>Optimizations were done for Restful Clients and Plugin loaders.</li>
+  <li>Seamless integration of metrics &amp; tracing were added in to improve the monitoring capabilities.</li>
+  <li>Security was improved in terms of Service Discovery based on rules, default TLS Cipher Suites were added.</li>
+  <li>Event driven mechanisms were adopted for Service-Dependency management.</li>
+  <li>Better management of data was implemented in case of recovery management.</li>
+  <li>Efforts were made to make the ETCD connection resilient and self healing.</li>
+  <li>Support for Async rest template and ipv6 supports were added.</li>
+  <li>Concrete License Management has been done to give full credits to the authors of third party dependencies used in the project.</li>
+  <li>Support for deployement of Service-Centere in multiple infrastructures has been added.</li>
+  <li>The Web Management Console was completely re-designed to provide better functionalities and user friendly.</li>
+</ul>
+
+        
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+      
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+            <h1 class="page__title" itemprop="headline">SecKill Development Journey (I)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+  2 minute read
+
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+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="overview">Overview</h2>
+<p>SecKill is a demo project that our ServiceComb team try to build a micro-service architecture from the perspective of domain-driven design (<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>).</p>
+
+<h2 id="background">Background</h2>
+
+<p>SecKill idea comments from the Internet popular promotions, using coupons to obtain some discounts; because the number of coupons is limited, so we must provide a platform for everyone who wants to get it fair competition.</p>
+
+<p>As a demo project, so we don’t want make the SecKill too complicated; we just use the most primitive strategy - first come first get. It is quite simple if you want to implements other strategies by yourself.</p>
+
+<h2 id="first-design">First Design</h2>
+<p>Now let’s analyze requirement in customer bounded context:</p>
+<ol>
+  <li>Customer try to grab a coupon, SecKill return the coupon according to the coupon in inventory;</li>
+  <li>Customer cannot get the coupon anymore if he already send the request to the system.</li>
+  <li>Customer can query how many coupons he owned.</li>
+</ol>
+
+<p>Let’s go! what? you say this description is to simple? because they are no registration system, and promotion is how come, how to start? which coupon the customer request for? Is the discount all same? etc.</p>
+
+<p>Actually, we are accustomed to thinking a lot at the beginning, so some larger system, the design stage may be a few months, but this time you can’t consider too much, because we believe:</p>
+
+<ol>
+  <li>Over-design can’t guarantee fully meeting the demand after construction completed, the only constant is the demand is always changing, so don’t over-design;</li>
+  <li>The principle of the microservice architecture is that service provides single function, so each components(microservices) only need to provide small service, without having to design all the services in system one-time;</li>
+  <li>Should be solve the problem of the core domain as soon as possible.</li>
+</ol>
+
+<p>Then, we can follow the many principles of domain-driven design (<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>). The core task of the design process is identify entities, value objects, services and other elements, and further search aggregation; because our requirements are very simple, so it’s easy find them out:</p>
+<ul>
+  <li>Entities:Promotion</li>
+  <li>Value-Object:Coupon,PromotionEvent</li>
+  <li>Domain Service:SecKill</li>
+</ul>
+
+<p>Now we can find the aggregation between them, separated two microservice, now we direct use MySQL database for shared data (although microservice recommend use independent storage for each, we can revisit it in the next iteration)</p>
+<ol>
+  <li>Command : for SecKill domain service</li>
+  <li>Query : for query Coupon Value-Object</li>
+</ol>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-arth-en.png" alt="Fig-1 Architecture" class="align-center" /></p>
+
+<h2 id="core-domain-implement">Core Domain Implement</h2>
+<p>The source code at <a href="https://github.com/ServiceComb/seckill">Github</a>, Welcome to Watch and Star : )</p>
+<h3 id="implement-of-command-micro-service">Implement of Command micro-service</h3>
+<p>We create two class “SecKillCommandService” and “SecKillPersistentRunner” to accept seckill request and persist seckill result, considering persistence is slow, we use BlockQueue temporary cache requests. another class “SecKillCommandRestController” act as Endpoint; ServiceComb support a variety of programming models and communication model, also well support Spring Boot, and easy deploy to Huawei cloud.</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-command-en.png" alt="Fig-2 Command micro-service components" class="align-center" /></p>
+
+<h3 id="implement-of-query-microservice">Implement of Query microService</h3>
+<p>Query logic is relatively simple, because PromotionEvent is Value-Object, we use PromotionEvent records to get Coupon Value-Object, you can read the source code and understand this process.</p>
+
+<h2 id="support-domain-implement">Support Domain Implement</h2>
+<p>As promotion is entity and seckill need it as preconditions, we need build and manage it in another domain, because it’s not so urgent at current stage, we can use Spring injection autowire fix objects.</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-spring.png" alt="Fig-3 Support domain object injection" class="align-center" /></p>
+
+<h2 id="function-verification">Function Verification</h2>
+<p>Finally, we use PostMan to check completed functions, Please ensure request body fill with JSON format, and set Content-Type to application/json:</p>
+
+<h3 id="request-seckill">Request SecKill</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-I-request-seckill.png" alt="Fig-4 Request seckill" class="align-center" /></p>
+
+<h3 id="query-owned-coupons">Query owned coupons</h3>
+
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+    <meta itemprop="headline" content="SecKill Develop Journey  (II)">
+    <meta itemprop="description" content="an introduction how to build seckill demo project step by step">
+    <meta itemprop="datePublished" content="August 30, 2017">
+    <meta itemprop="dateModified" content="September 13, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">SecKill Develop Journey  (II)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><a href="/docs/seckill-development-journey-part/">Previous article</a> We only built a core function seckill demo, this article we will gradually improve more features in order to let it had complete function.</p>
+
+<h2 id="problems">Problems</h2>
+<p>Review what we has been done, we can find that:</p>
+<ol>
+  <li>Service for Promotion entity is not provided (inject by Spring);</li>
+  <li>Lack some base check and features, include:
+    <ul>
+      <li>One customer can only grab one coupon per promotion</li>
+      <li>Support multi promotion activing (discount of each promotion is different)</li>
+    </ul>
+  </li>
+  <li>If Command micro-service down, it will recovery all uncompleted promotions immediately before start-up again.</li>
+</ol>
+
+<p>Maybe you would say that customer management and customer login function are not listed? Indeed, the customer is indispensable in our scenario, in order to simply design, we don’t include login and token authentication etc., if you are interesting about this, you can see ServiceComb’s <a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop">Company</a> demo application to get more information.</p>
+
+<h2 id="improvement-design">Improvement Design</h2>
+<p>For entity, domain-driven design (<a href="https://en.wikipedia.org/wiki/Domain-driven_design">DDD</a>) recommended to use a separate interface, so we design a new Admin micro-service to provide service:</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-arth-en.png" alt="Fig-1 Architecture after Admin micro-service added" class="align-center" /></p>
+
+<h2 id="improvement-implement">Improvement Implement</h2>
+<h3 id="implement-of-admin-micro-service">Implement of Admin micro-service</h3>
+<p>Admin micro-service only provide services for promotion entity, we can map this function to REST method:</p>
+<ul>
+  <li>New promotion map to Post;</li>
+  <li>Modify promotion map to Put;  　　</li>
+  <li>Query promotion map to Get;  　　</li>
+  <li>
+    <p>Delete promotion map to Delete.　　</p>
+
+    <p>To match current requirement we only need implement Post and Get, In addition, already started promotion should not be able to modify, so we increased the corresponding check.</p>
+  </li>
+</ul>
+
+<h3 id="new-check-and-features-implement">New check and features Implement</h3>
+<p>Add a HashSet per promotion to check whether customer had grab coupon; <br />
+  Add “SecKillPromotionBootstrap” class as promotion bootstrap manager for support multi active, “SecKillCommandService” and “SecKillPersistentRunner” now managed(create) by it。</p>
+
+<h3 id="command-micro-service-auto-recovery-implement">Command micro-service auto recovery Implement</h3>
+<p>Add “SecKillRecoveryService” class to check state of promotion, uncomplement promotions whether unstart or activing all need check by it to init start-up information including left coupons, grabbed customers list, etc.</p>
+
+<h2 id="function-verification">Function Verification</h2>
+<p>Finally, we use PostMan to check completed functions, Please ensure request body fill with JSON format, and set Content-Type to application/json：</p>
+<h3 id="create-promotion">Create Promotion</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-create-promotion.png" alt="Fig-2 Create promotion" class="align-center" /></p>
+
+<h3 id="query-activing-promotions">Query Activing Promotions</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-query-active-promotion.png" alt="Fig-3 Query activing promotions" class="align-center" /></p>
+
+<h3 id="reject-duplicate-grab">Reject duplicate Grab</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-II-reject-duplicate-grab.png" alt="Fig-4 Reject duplicate grab" class="align-center" /></p>
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+    <meta itemprop="headline" content="SecKill Develop Journey (III)">
+    <meta itemprop="description" content="an introduction how build seckill demo project step by step">
+    <meta itemprop="datePublished" content="September 07, 2017">
+    <meta itemprop="dateModified" content="September 13, 2017">
+
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+          <header>
+            <h1 class="page__title" itemprop="headline">SecKill Develop Journey (III)
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><a href="/docs/seckill-development-journey-part-II/">Previous article</a> we had built a full-featured seckill demo, release it version 0.1.0-RELEASE; now you should find that data persistence is centered on a single database, seckill is high-stress scenario, it’s difficult to meet high-scalable requirement, and as we mentioned at the beginning, micro-service is recommended to have independent storage, so we will start using Event Sourcing implement CQRS pattern to enhance the ability to endure huge requests.</p>
+
+<h2 id="cqrs">CQRS</h2>
+<p>CQRS means Command Query Responsibility Segregation, it’s a powerful design pattern, often implement with Event Sourcing, there has a figure describe it from Microsoft MSDN:</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-III-cqrs.png" alt="Fig-1 CQRS" class="align-center" /></p>
+
+<h2 id="improvement-design">Improvement Design</h2>
+<p>CQRS is read write separation and message-driven best practices, now we focus on the MySQL database:</p>
+<ol>
+  <li>The database should be split into ReadDB and WriteDB,read-intensive Query micro-service and write-intensive Command micro-service should be independent;</li>
+  <li>ReadDB and WriteDB using Event Message drive data synchronization, so we need add a new micro-service named Event(Processor);</li>
+  <li>Message Broker currently has a lot of great implements, such as RabbitMQ, Kafka, etc., because our seckill based on ServiceComb and Spring Boot, in order to be able to quickly build this new feature, we use built-in ActiveMQ, which supports memory queue mode, very easy to build Testing, suitable for agile development approach</li>
+</ol>
+
+<p>Now the latest Architecture below:</p>
+
+<p><img src="/assets/images/seckill-develop-course-part-III-arch-en.png" alt="Fig-2 CQRS improved Architecture" class="align-center" /></p>
+
+<h2 id="improvement-implement">Improvement Implement</h2>
+<h3 id="database-separation">Database Separation</h3>
+<h4 id="writedb">WriteDB</h4>
+<p>Admin micro-service maintain Promotion entity;</p>
+
+<p>Command micro-service write PromotionEvent Value-Object,when recovery Promotion,Relapy PromotionEvent.</p>
+<h4 id="readdb">ReadDB</h4>
+<p>Event micro-service write ActivePromotion Value-Object and Coupon Value-Object;</p>
+
+<p>Query micro-service query ActivePromotion Value-Object and Coupon Value-Object.</p>
+
+<h4 id="command-micro-service-message-publisher-component">Command micro-service Message Publisher component</h4>
+<p>Since the Event Sourcing was not introduced before, the PromotionEvent entity only needed to write to the database directly. Now it is necessary to publish PromotionEvent to Message Broker. Considering that future we will be replaced by Distributed Message Service (DMS) as Message Broker in order to deploy to <a href="http://www.hwclouds.com/">Huawei Cloud</a>, We defined the generic message publish interface:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">SecKillMessagePublisher</span> <span class="o">{</span>
+  <span class="kt">void</span> <span class="nf">publishMessage</span><span class="o">(</span><span class="nc">String</span> <span class="n">messageContent</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h4 id="event-micro-service-implement">Event micro-service implement</h4>
+<p>Event micro-service subscribe Message Broker in order to get PromotionEvent Message, then depending on the message type convert to ActivePromotion Value-Object operation or Coupon Value-Object operation in ReadDB.</p>
+<ul>
+  <li>Promotion Start Message: create ActivePromotion Value-Object;</li>
+  <li>Promotion Finish Message: delete ActivePromotion Value-Object var Id;</li>
+  <li>
+    <p>Coupon Grabbed Message: create Coupon Value-Object;</p>
+
+    <p>Also considering that future we will be replaced by Distributed Message Service (DMS) as Message Broker in order to deploy to <a href="http://www.hwclouds.com/">Huawei Cloud</a>, We defined the generic message subscribe interface:</p>
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">SecKillMessageSubscriber</span> <span class="o">{</span>
+<span class="kt">void</span> <span class="nf">subscribeMessage</span><span class="o">(</span><span class="nc">String</span> <span class="n">messageContent</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h4 id="update-of-query-micro-service">Update of Query micro-service</h4>
+<p>After the refactoring of the read and write separation, all activing Promotion are saved in ActivePromotion Value-Object Table, and customers own Coupon are stored in Coupon Value-Object Table, now we can directly query them, no longer need Replay PromotionEvent.</p>
+
+<h2 id="all-in-one-start-up">All-In-One start-up</h2>
+<p>Now, we have complete Event Sourcing architecture refactoring, in order to be easy to start-up, we provide docker compose script, use it pull all services up by one command, see detail at <a href="https://github.com/ServiceComb/seckill">SecKill</a>.</p>
+
+<h3 id="start-up-all-service-in-docker-toolbox">start-up all service in Docker ToolBox</h3>
+
+<p><img src="/assets/images/seckill-develop-course-part-III-seckill-all-in-one.png" alt="Fig-3 SecKill All-in-One" class="align-center" /></p>
+
+<h2 id="reference">Reference</h2>
+<ol>
+  <li><a href="https://docs.microsoft.com/en-us/azure/architecture/patterns/cqrs">Command and Query Responsibility Segregation (CQRS) pattern</a> by Microsoft Azure Team</li>
+  <li><a href="https://msdn.microsoft.com/en-us/library/jj591559.aspx">Introducing Event Sourcing</a> by Microsoft patterns &amp; practices Developer Center</li>
+  <li><a href="https://martinfowler.com/eaaDev/EventSourcing.html">Event Sourcing</a> by Martin Fowler</li>
+</ol>
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+    <meta itemprop="description" content="An introduction Service-Center Management Console">
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+
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Service-Center Management UI Console
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 分钟 阅读
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Service-Center Management UI Console enables user to view the list of MicroServices registered in SC.
+Users can view the detailed information of their MicroServices, Instances and Schemas.
+Service-Center UI also offers a unique feature of testing the Schemas of their MicroServices from UI, Users 
+can also download the html client for their Schemas.</p>
+
+<h3 id="preview-of-management-console">Preview of Management Console</h3>
+<p><img src="/assets/images/Service-Center-UI-Preview.gif" alt="Preview" class="align-center" /></p>
+
+<h3 id="features">Features</h3>
+<p>Service-Center Management console offers very useful features which makes users easy to use and manage service-center.</p>
+
+<h3 id="dashboard">Dashboard</h3>
+<p>This is the place where you can get the overall information about the services which are registered in your service-center like total number of services, providers, consumers and total instances. You can also get a list of Services which based on their current status.<br />
+<img src="/assets/images/Dashboard.PNG" alt="Dashboard" class="align-center" /></p>
+
+<h3 id="micro-service-list">Micro-Service List</h3>
+<p>This is the place where you can see the basic details of all the services which are registered in Service-Center. You can see the details like MicroService Name, Application Name, Status, Version, Creation time and Instance count. You can also un-register the microservice from Operations Tab if there is no running instances for the microservice.<br />
+<img src="/assets/images/ServiceList.PNG" alt="ServiceList" class="align-center" /></p>
+
+<h3 id="instance-details">Instance Details</h3>
+<p>This is the place where you can see all the current running instances for the MicroService, you can get the list of endpoints and their protocols.<br />
+<img src="/assets/images/InstanceList.PNG" alt="InstanceList" class="align-center" /></p>
+
+<h3 id="provider-list">Provider List</h3>
+<p>This is the place where you can get the list of all the providers for the MicroService.<br />
+<img src="/assets/images/ProviderList.PNG" alt="Provider List" class="align-center" /></p>
+
+<h3 id="consumer-list">Consumer List</h3>
+<p>This is the place where you can get the list of all the consumers for the MicroService<br />
+<img src="/assets/images/ConsumerList.PNG" alt="Consumer List" class="align-center" /></p>
+
+<h3 id="schema-list">Schema List</h3>
+<p>This is the place where we can get the list of all the Schema's for your MicroService, here you get options of viewing the Schema in Swagger form or Test the Schema on some particular instance. Here you also get an option to Download the Schema file in Html Client form.<br />
+<img src="/assets/images/SchemaList.PNG" alt="Schema List" class="align-center" /></p>
+
+<p>For Viewing the Schema in Swagger form you can click on Test Schema button and you can view the complete details of Schema in Swagger form.</p>
+
+<p><img src="/assets/images/SchemaView.PNG" alt="View Swagger" class="align-center" /></p>
+
+<p>If you wish to test the Schema on some particular Instance then you can click on Test Schema and select the instance on which you want to test the Schema and then select the endpoints for that instance.<br />
+<img src="/assets/images/SelectInstance.PNG" alt="Select Instance" class="align-center" /></p>
+
+<p>Once you selected the instance then you are ready for testing the Schema, you can input the required parameters for the Schema and hit on ‘Try it Out’ Button.<br />
+<img src="/assets/images/Schematest.PNG" alt="Schema Test" class="align-center" /></p>
+
+<h5 id="you-can-have-a-look-at-the-quick-start-guide-to-know-about-how-to-bring-up-the-management-console">You can have a look at the <a href="https://github.com/apache/incubator-servicecomb-service-center/tree/master/frontend#quickstart-guide">Quick Start Guide</a> to know about how to bring up the Management Console.</h5>
+
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+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> 最新的:</strong> <time datetime="2017-10-30">2017年10月30日</time></p>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Install of ServiceCenter">
+    <meta itemprop="description" content="Learn how to run ServiceComb’s service center">
+    
+    <meta itemprop="dateModified" content="November 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Install of ServiceCenter
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#service-center" id="markdown-toc-service-center">Service-Center</a></li>
+  <li><a href="#run-with-release-package" id="markdown-toc-run-with-release-package">Run with release package</a></li>
+  <li><a href="#run-with-docker" id="markdown-toc-run-with-docker">Run with docker</a></li>
+  <li><a href="#deployment-with-kubernetes" id="markdown-toc-deployment-with-kubernetes">Deployment with Kubernetes</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="service-center">Service-Center</h2>
+<p>ServiceCenter is a service registry. The service provider can register its own instance information to the ServiceCenter for the service consumer to discover and use.</p>
+
+<h2 id="run-with-release-package">Run with release package</h2>
+<ol>
+  <li>Download <a href="/release/service-center-downloads/">the latest release package of Service-Center</a><br />
+This example uses  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz</li>
+  <li>Start service-center
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># Decompression the package</span>
+<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span>  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
+   
+<span class="c"># Start the service of servicecenter</span>
+<span class="nv">$ </span><span class="nb">cd </span>apache-servicecomb-service-center-1.3.0-linux-amd64/
+<span class="nv">$ </span>./start-service-center.sh
+</code></pre></div>    </div>
+  </li>
+  <li>View service status
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># View process status</span>
+<span class="nv">$ </span>ps <span class="nt">-ef</span> | <span class="nb">grep </span>service-center
+root     27048     1  2 14:38 pts/2    00:00:00 ./service-center
+root     27164 22742  0 14:38 pts/2    00:00:00 <span class="nb">grep</span> <span class="nt">--color</span><span class="o">=</span>auto service-center
+   
+<span class="c"># View the listening port</span>
+<span class="nv">$ </span>netstat <span class="nt">-apn</span> | <span class="nb">grep</span> :30100
+tcp        0      0 127.0.0.1:30100         0.0.0.0:<span class="k">*</span>               LISTEN      27048/service-cente
+   
+<span class="c"># Call the interface with the curl command</span>
+<span class="nv">$ </span>curl http://127.0.0.1:30100
+<span class="o">{</span><span class="s2">"_links"</span>:<span class="o">{</span><span class="s2">"pb:latest-pact-versions"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/latest"</span>,<span class="s2">"title"</span>:<span class="s2">"Latest pact versions"</span><span class="o">}</span>,<span class="s2">"pb:latest-provider-pacts"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/provider/{provider}/latest"</span>,<span class="s2">"title"</span>:<span class="s2">"Latest pacts by provider"</span>,<span class="s2">"templated"</span>:true<span class="o">}</span>,<span class="s2">"pb:latest-provider-pacts-with-tag"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/provider/{provider}/latest/{tag}"</span>,<span class="s2">"title"</span>:<span class="s2">"Latest pacts by provider with a specified tag"</span>,<span class="s2">"templated"</span>:true<span class="o">}</span>,<span class="s2">"pb:pacticipants"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/participants"</span>,<span class="s2">"title"</span>:<span class="s2">"Pacticipants"</span><span class="o">}</span>,<span class="s2">"pb:publish-pact"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/pacts/provider/{provider}/consumer/{consumer}/version/{consumerApplicationVersion}"</span>,<span class="s2">"title"</span>:<span class="s2">"Publish a pact"</span>,<span class="s2">"templated"</span>:true<span class="o">}</span>,<span class="s2">"pb:webhooks"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/webhooks"</span>,<span class="s2">"title"</span>:<span class="s2">"Webhooks"</span><span class="o">}</span>,<span class="s2">"self"</span>:<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/"</span>,<span class="s2">"title"</span>:<span class="s2">"Index"</span><span class="o">}}</span>,<span class="s2">"curies"</span>:[<span class="o">{</span><span class="s2">"href"</span>:<span class="s2">"http://127.0.0.1:30100/doc/{rel}"</span>,<span class="s2">"name"</span>:<span class="s2">"pb"</span><span class="o">}]}</span>
+   
+<span class="c"># If the above content is returned, the startup was successful.</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Start the website of frontend and view the status
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./start-frontend.sh
+<span class="nv">$ </span>ps <span class="nt">-ef</span> | <span class="nb">grep </span>frontend   
+root      1875 32096  0 17:43 pts/6    00:00:00 <span class="nb">grep</span> <span class="nt">--color</span><span class="o">=</span>auto frontend
+root      3020     1  0 Nov05 ?        00:00:23 ./frontend
+   
+<span class="c"># View the listening port</span>
+<span class="nv">$ </span>netstat <span class="nt">-apn</span> | <span class="nb">grep</span> :30103
+tcp        0      0 127.0.0.1:30103     0.0.0.0:<span class="k">*</span>               LISTEN      3020/frontend
+</code></pre></div>    </div>
+  </li>
+  <li>Open the website page “http://127.0.0.1:30103” with a browser, and view instances of the service center in website.（The result is success if like this）<br />
+<img src="/assets/images/docs/service-center/service-center.jpg" alt="1" /><br />
+<strong><em>Warning</em></strong>
+    <ul>
+      <li>If the frontend service is started not locally, it cannot be accessed through http://127.0.0.1:30103; you need to modify the “frontend_host_ip” in the configuration file as the host IP ，and open the website to accessed http://{ip}:30103</li>
+      <li>If Service-Center needs to provide external services, you need to modify “httpaddr”, and external applications use http://{ip}:30100 for access. 
+Like this：<br />
+<img src="/assets/images/docs/service-center/config-host-ip.jpg" alt="1" /></li>
+    </ul>
+  </li>
+</ol>
+
+<h2 id="run-with-docker">Run with docker</h2>
+<ol>
+  <li>Download and run docker image
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># Download the docker image</span>
+<span class="nv">$ </span>docker pull servicecomb/service-center
+<span class="c"># Start docker container</span>
+<span class="nv">$ </span>docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center
+</code></pre></div>    </div>
+  </li>
+  <li>View container status and listening port
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>docker ps | <span class="nb">grep </span>service-center
+0733021cd96d        servicecomb/service-center        <span class="s2">"/opt/service-cent..."</span>   3 minutes ago       Up 3 minutes        0.0.0.0:30100-&gt;30100/tcp        gallant_varahamihira 
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h2 id="deployment-with-kubernetes">Deployment with Kubernetes</h2>
+<ol>
+  <li>Configuring the deployment of kubernetes
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cat</span> <span class="o">&lt;&lt;</span><span class="no">EOF</span><span class="sh"> &gt;&gt; ./service-center.yaml
+   apiVersion: v1
+   kind: Service
+   metadata:
+     name: servicecenter
+     labels:
+       app: servicecenter
+   spec:
+     ports:
+     - port: 30100
+       name: http
+     selector:
+       app: servicecenter
+   ---
+   apiVersion: extensions/v1beta1
+   kind: Deployment
+   metadata:
+     name: servicecenter
+   spec:
+     replicas: 1
+     template:
+       metadata:
+         labels:
+           app: servicecenter
+           version: v1
+       spec:
+         containers:
+         - name: servicecenter
+           image: servicecomb/service-center:latest
+           imagePullPolicy: IfNotPresent
+           ports:
+           - containerPort: 30100 
+</span><span class="no">EOF
+</span></code></pre></div>    </div>
+  </li>
+  <li>Deployment
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># create namespace "servicecomb"</span>
+<span class="nv">$ </span>kubectl create namespace servicecomb
+   
+<span class="c"># deploy service-center</span>
+<span class="nv">$ </span>kubectl <span class="nt">-n</span> servicecomb create <span class="nt">-f</span> service-center.yaml
+</code></pre></div>    </div>
+  </li>
+  <li>View Pod status and Service port
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># View Pod status</span>
+<span class="nv">$ </span>kubectl <span class="nt">-n</span> servicecomb get pod
+NAME                             READY   STATUS    RESTARTS   AGE
+servicecenter-7d964b7644-h6f4s   1/1     Running   0          72s
+   
+<span class="c"># View the the listening port of service</span>
+<span class="nv">$ </span>kubectl <span class="nt">-n</span> servicecomb get service
+NAME            TYPE        CLUSTER-IP       EXTERNAL-IP   PORT<span class="o">(</span>S<span class="o">)</span>     AGE
+servicecenter   ClusterIP   10.104.241.163   &lt;none&gt;        30100/TCP   118s
+   
+<span class="nv">$ </span>curl http://10.104.241.163:30100
+...
+</code></pre></div>    </div>
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content/docs/service-center/registration-discovery/index.html

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+    <meta itemprop="headline" content="Registration&amp;Discovery">
+    <meta itemprop="description" content="Registration and discovery of the service-center">
+    
+    <meta itemprop="dateModified" content="November 12, 2019">
+
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+      
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+            <h1 class="page__title" itemprop="headline">Registration&amp;Discovery
+</h1>
+            
+          </header>
+        
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#registrationdiscovery" id="markdown-toc-registrationdiscovery">Registration&amp;Discovery</a></li>
+  <li><a href="#registration-and-discovery-process" id="markdown-toc-registration-and-discovery-process">Registration and discovery process</a></li>
+  <li><a href="#first-used-of-registration-and-discovery" id="markdown-toc-first-used-of-registration-and-discovery">First used of registration and discovery</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="registrationdiscovery">Registration&amp;Discovery</h2>
+<p>In a microservices architecture, an application consists of a set of services with a single responsibility, and each service is dynamically deployed to a different node. How should we manage the dependencies between this set of services? 
+   <img src="/assets/images/docs/service-center/service-center-why.png" alt="1" /> <br />
+   The service registry has solved this problem. It allows the service of provider to register its information to the service-center; the service of consumer can discover the provider information from the service-center.
+   The service registry has several advantages:</p>
+<ul>
+  <li>1 Decouple the provider and the consumer, the service consumer does not need to know the provider address;</li>
+  <li>2 Service dynamic discovery and scalability, dynamic changes of the instance of provider will be pushed to the consumer with the service-center;</li>
+  <li>3 You can monitor the quality of service operations and service dependencies dynamically, and provide governance capabilities for services.</li>
+</ul>
+
+<h2 id="registration-and-discovery-process">Registration and discovery process</h2>
+<p><img src="/assets/images/docs/service-center/registration&amp;discovery.png" alt="1" /><br />
+   The service registration and discovery process in Service-Center has the following steps:</p>
+<ul>
+  <li>1 Registration the provider service to Service-Center.</li>
+  <li>2 The provider sends a heartbeat to maintain the “UP” state in Service-Center.</li>
+  <li>3 Registration the consumer service to Service-Center.</li>
+  <li>4 The Consumer discover the provider information from Service-Center.</li>
+  <li>5 The consumer request the provider and get results.</li>
+</ul>
+
+<p>The Service-Center registration and discovery interface is implemented based on the RESTful standard. It is not restricted by the development language. For the interface definition, please refer to <a href="https://rawcdn.githack.com/ServiceComb/service-center/master/docs/api-docs.html">API Document</a></p>
+
+<h2 id="first-used-of-registration-and-discovery">First used of registration and discovery</h2>
+<p>This chapter is about how to implement the feature of micro-service discovery with ServiceCenter.</p>
+<ol>
+  <li>Registration the provider service
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://127.0.0.1:30100/registry/v3/microservices <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "service":
+  {
+    "appId": "default",
+    "serviceName": "ProviderDemoService",
+    "version":"1.0.0"
+  }
+}'</span>
+</code></pre></div>    </div>
+    <p>And then you can get the ‘ProviderDemoService’ ID like below:</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="o">{</span><span class="s2">"serviceId"</span>:<span class="s2">"fa82132706a6b75a13393d8cf48800f9689b2603"</span><span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Registration the provider instance<br />
+Mark down the micro-service ID and call the instance registration API, according to the ServiceCenter definition: One process should be registered as one instance.
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://127.0.0.1:30100/registry/v3/microservices/fa82132706a6b75a13393d8cf48800f9689b2603/instances <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "instance": 
+  {
+      "hostName":"provider-demo",
+      "endpoints": [
+          "rest://127.0.0.1:8080"
+      ]
+  }
+}'</span>
+</code></pre></div>    </div>
+    <p>The successful response like below:</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="o">{</span><span class="s2">"instanceId"</span>:<span class="s2">"6e160fb0196e11e9b8b50242ac110005"</span><span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Registration the consumer service
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://127.0.0.1:30100/registry/v3/microservices <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "service":
+  {
+    "appId": "default",
+    "serviceName": "ConsumerDemoService",
+    "version":"1.0.0"
+  }
+}'</span>
+</code></pre></div>    </div>
+    <p>if all are successful, it means you have completed the micro-service registration and instance publish</p>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="o">{</span><span class="s2">"serviceId"</span>:<span class="s2">"d08d29edbeaa372c5be88407aa9adb00b4cb6099"</span><span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Discovery the provider<br />
+The next step is that discovery the micro-service instance by service name and version rule
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> GET <span class="se">\</span>
+<span class="s1">'http://127.0.0.1:30100/registry/v3/instances?appId=default&amp;serviceName=ProviderDemoService&amp;version=latest'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'content-type: application/json'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-consumerid: d08d29edbeaa372c5be88407aa9adb00b4cb6099'</span> <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'x-domain-name: default'</span>
+<span class="o">{</span>
+  <span class="s2">"instances"</span>: <span class="o">[</span>
+    <span class="o">{</span>
+      <span class="s2">"instanceId"</span>: <span class="s2">"c23da577197111e9b8b50242ac110005"</span>,
+      <span class="s2">"serviceId"</span>: <span class="s2">"fa82132706a6b75a13393d8cf48800f9689b2603"</span>,
+      <span class="s2">"endpoints"</span>: <span class="o">[</span>
+        <span class="s2">"rest://127.0.0.1:8080"</span>
+      <span class="o">]</span>,
+      <span class="s2">"hostName"</span>: <span class="s2">"provider-demo"</span>,
+      <span class="s2">"status"</span>: <span class="s2">"UP"</span>,
+      <span class="s2">"healthCheck"</span>: <span class="o">{</span>
+        <span class="s2">"mode"</span>: <span class="s2">"push"</span>,
+        <span class="s2">"interval"</span>: 30,
+        <span class="s2">"times"</span>: 3
+      <span class="o">}</span>,
+      <span class="s2">"timestamp"</span>: <span class="s2">"1547631199"</span>,
+      <span class="s2">"modTimestamp"</span>: <span class="s2">"1547631199"</span>,
+      <span class="s2">"version"</span>: <span class="s2">"1.0.0"</span>
+    <span class="o">}</span>
+  <span class="o">]</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
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+    <meta itemprop="description" content="Analysis of service registry and propose a new architecture for it">
+    <meta itemprop="datePublished" content="December 19, 2017">
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+          <header>
+            <h1 class="page__title" itemprop="headline">Proposal for refactoring service registry module in Java Chassis
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="background">Background</h2>
+
+<p>The architecture of the <code class="highlighter-rouge">service registry</code> module in Java Chassis is as follows.</p>
+
+<p><img src="/assets/images/service_registry.png" alt="" /></p>
+
+<p>However, it has the following problems:</p>
+
+<ul>
+  <li>Low level components access high level components frequently. The cyclic relationships make the implementation complicated and introduce some redundant access points.</li>
+  <li>Low level components should be stateless to be reused by high level components. Introducing state into low level components makes it relies heavily on the high level components, causing cyclic relationships.</li>
+  <li>Hard to integrate with third-party framework. It does not provide a standalone client with cache capability inside. It also requires the configurations should be loaded from dynamic properties.</li>
+</ul>
+
+<h2 id="proposed-architecture">Proposed Architecture</h2>
+
+<p><img src="/assets/images/proposed_architecture.png" alt="" /></p>
+
+<p>The above architecture is what the <code class="highlighter-rouge">service registry</code> module supposed to be in my opinion. The low level components like <code class="highlighter-rouge">ApiManager</code> and <code class="highlighter-rouge">UriManager</code> are stateless so they do not rely on high level components any more. Relationships between components are clear and simple.</p>
+
+<p>Tasks can be divided into the following parts:</p>
+
+<p><img src="/assets/images/task.png" alt="" /></p>
+
+<p>There are two types of tasks:</p>
+
+<ul>
+  <li>Simple Task. Task that executes only once.</li>
+  <li>Period Task. Task that executes at every interval.</li>
+</ul>
+
+<p>The result of task will convert to event and posts to the <code class="highlighter-rouge">EventManager</code>. Any methods that subscribes that kind of event will be notified and execute the corresponding response, e.g. update the cache.</p>
+
+<p>Both the outside requests and chassis requests share the same interface of Configuration, they can implement their own way to load configurations. The difference between chassis requests and outside requests is that chassis requests need to manage microservice informations of their own. Besides,  chassis requests also need to provide a compatible interface for requests to use. There comes  to the component <code class="highlighter-rouge">RegistryUtils</code>. It is responsible for the following stuff:</p>
+
+<ul>
+  <li>Initialize service registry client with configurations.</li>
+  <li>Initialization of service center service, attach with a PullTask.</li>
+  <li>Initialization of service itself, attach with RegisterTask, HeartbeatTask and WatchTask.</li>
+  <li>Provide wrapper method for service registry client.</li>
+</ul>
+
+<p>The initialization process of service registry client is as follows:</p>
+
+<p><img src="/assets/images/client_initialization.png" alt="" /></p>
+
+<p>If the auto discovery switch is on, it need to create a period task <code class="highlighter-rouge">PullTask</code> to make the available service center services’ information up to date.</p>
+
+<p>Any requests to a new microservice will create a new entry in the service registry client. Once we access the same microservice again, the client will response with the cached version which reduces communication cost with service center.</p>
+
+<p>Let’s checkout how the <code class="highlighter-rouge">Microservice</code> component works. Instances and its versions are cached inside the microservice. To get an instance of a specified id, all it needs to do is lookup the cache or create a query task to update the cache. All interactions from <code class="highlighter-rouge">Microservice</code> to  <code class="highlighter-rouge">ApiManager</code> are done by the <code class="highlighter-rouge">Task</code>.</p>
+
+<p>The <code class="highlighter-rouge">ApiManager</code> is designed to interact directly with service center as a pure client with api inside only. Its structure is as follows:</p>
+
+<p><img src="/assets/images/api_manager.png" alt="" /></p>
+
+        
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+      <a href="/tags/#refactor" class="page__taxonomy-item" rel="tag">refactor</a>
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+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> Updated:</strong> <time datetime="2017-12-19">December 19, 2017</time></p>
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content/docs/servicecomb-accept-newcapec-institute-code-donation/index.html

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+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  less than 1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><a href="https://github.com/apache/servicecomb-toolkit">ServiceComb Toolkit</a> recently recieved a code donation(<a href="https://github.com/NewCapec-Institute/oas-validator">oas-validator</a>) from <a href="https://github.com/orgs/NewCapec-Institute/dashboard">NewCapec Institute</a>, oas-validator provides OpenAPI V3 style and compatiblity check functionalities。Related links：</p>
+
+<ul>
+  <li><a href="https://lists.apache.org/thread.html/062cf6e67add1061aad3b106543842a8ac95959da8cd45bf2f88d597@%3Cdev.servicecomb.apache.org%3E">Donation acceptance vote</a></li>
+  <li><a href="https://incubator.apache.org/ip-clearance/servicecomb-oas-validator.html">IP Clearance Status</a></li>
+  <li><a href="https://github.com/apache/servicecomb-toolkit/pull/40">Code import PR</a></li>
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+            <h1 class="page__title" itemprop="headline">ServiceComb Pack 0.4.0 Cluster : Implementation
+</h1>
+            
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+
+
+
+
+  5 minute read
+
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+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Now you can run multiple Alpha server in High Availability (HA) mode which support to run the event scanning in the master node only. You can also turn off event table scanning for some nodes with parameter <code class="highlighter-rouge">alpha.event.scanner.enabled=false</code> . However, transaction compensation will fail when the node that enabled the event table scan is crashed.
+We implemented database-based distributed lock in version 0.4.0 version, event scanning only runs on the master node in the cluster, When the master node is down, other nodes in the cluster will elect a new master node.</p>
+
+<h2 id="quick-starts">Quick Starts</h2>
+
+<p>Enable cluster support by parameter <code class="highlighter-rouge">alpha.cluster.master.enabled=true</code>.</p>
+
+<ul>
+  <li>Start Two Alphas.</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-SNAPSHOT-exec.jar <span class="se">\</span>
+<span class="nt">--server</span>.port<span class="o">=</span>8090 <span class="se">\</span>
+<span class="nt">--alpha</span>.server.port<span class="o">=</span>8080 <span class="se">\</span>
+<span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+<span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+<span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+<span class="nt">--alpha</span>.cluster.master.enabled<span class="o">=</span><span class="nb">true</span>
+</code></pre></div></div>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-SNAPSHOT-exec.jar <span class="se">\</span>
+<span class="nt">--server</span>.port<span class="o">=</span>8091 <span class="se">\</span>
+<span class="nt">--alpha</span>.server.port<span class="o">=</span>8081 <span class="se">\</span>
+<span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+<span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+<span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+<span class="nt">--alpha</span>.cluster.master.enabled<span class="o">=</span><span class="nb">true</span>
+</code></pre></div></div>
+
+<ul>
+  <li>Who Is Master</li>
+</ul>
+
+<p><code class="highlighter-rouge">Master Node</code> This alpha is the master</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>01:31:07.032 <span class="o">[</span>pool-3-thread-1] INFO  org.apache.servicecomb.pack.alpha.server.cluster.master.ClusterLockService - Master Node
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">Slave Node</code> This alpha is the slave</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>01:31:31.059 <span class="o">[</span>pool-3-thread-1] INFO  org.apache.servicecomb.pack.alpha.server.cluster.master.ClusterLockService - Slave Node
+</code></pre></div></div>
+
+<ul>
+  <li>Switch Master Nodes</li>
+</ul>
+
+<p>After the master node is off line, other nodes in the cluster will elect a new master node</p>
+
+<h2 id="how-to-make-event-scanning-only-run-on-the-master-node">How to make event scanning only run on the master node</h2>
+
+<p>Event scanning is implemented by <code class="highlighter-rouge">EventScanner.java</code> , initialize it in <code class="highlighter-rouge">AlphaConfig.java</code> , you can enable it by setting the parameter ‘alpha.event.scanner.enabled=true’, it will be instantiated EventScanner. The variable nodeStatus is the node type(Master or Slave). Later, I will introduce how <code class="highlighter-rouge">nodeStatus</code> is initialized.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Bean</span>
+<span class="nc">TxConsistentService</span> <span class="nf">txConsistentService</span><span class="o">(</span>
+  <span class="nd">@Value</span><span class="o">(</span><span class="s">"${alpha.event.pollingInterval:500}"</span><span class="o">)</span> <span class="kt">int</span> <span class="n">eventPollingInterval</span><span class="o">,</span>
+  <span class="nd">@Value</span><span class="o">(</span><span class="s">"${alpha.event.scanner.enabled:true}"</span><span class="o">)</span> <span class="kt">boolean</span> <span class="n">eventScannerEnabled</span><span class="o">,</span>
+  <span class="nc">ScheduledExecutorService</span> <span class="n">scheduler</span><span class="o">,</span>
+  <span class="nc">TxEventRepository</span> <span class="n">eventRepository</span><span class="o">,</span>
+  <span class="nc">CommandRepository</span> <span class="n">commandRepository</span><span class="o">,</span>
+  <span class="nc">TxTimeoutRepository</span> <span class="n">timeoutRepository</span><span class="o">,</span>
+  <span class="nc">OmegaCallback</span> <span class="n">omegaCallback</span><span class="o">)</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">eventScannerEnabled</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">new</span> <span class="nf">EventScanner</span><span class="o">(</span><span class="n">scheduler</span><span class="o">,</span>
+          <span class="n">eventRepository</span><span class="o">,</span> <span class="n">commandRepository</span><span class="o">,</span> <span class="n">timeoutRepository</span><span class="o">,</span>
+          <span class="n">omegaCallback</span><span class="o">,</span> <span class="n">eventPollingInterval</span><span class="o">,</span> <span class="n">nodeStatus</span><span class="o">).</span><span class="na">run</span><span class="o">();</span>
+      <span class="no">LOG</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Starting the EventScanner."</span><span class="o">);</span>
+      <span class="o">}</span>
+    <span class="nc">TxConsistentService</span> <span class="n">consistentService</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">TxConsistentService</span><span class="o">(</span><span class="n">eventRepository</span><span class="o">);</span>
+    <span class="k">return</span> <span class="n">consistentService</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>The pollEvents method of <code class="highlighter-rouge">EventScanner.java</code> for scanning events, If the master node <code class="highlighter-rouge">nodeStatus.isMaster()</code> returns true.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">private</span> <span class="kt">void</span> <span class="nf">pollEvents</span><span class="o">()</span> <span class="o">{</span>
+  <span class="n">scheduler</span><span class="o">.</span><span class="na">scheduleWithFixedDelay</span><span class="o">(</span>
+    <span class="o">()</span> <span class="o">-&gt;</span> <span class="o">{</span>
+      <span class="c1">// only pull the events when working in the master mode</span>
+      <span class="k">if</span><span class="o">(</span><span class="n">nodeStatus</span><span class="o">.</span><span class="na">isMaster</span><span class="o">()){</span>
+        <span class="n">updateTimeoutStatus</span><span class="o">();</span>
+        <span class="n">findTimeoutEvents</span><span class="o">();</span>
+        <span class="n">abortTimeoutEvents</span><span class="o">();</span>
+        <span class="n">saveUncompensatedEventsToCommands</span><span class="o">();</span>
+        <span class="n">compensate</span><span class="o">();</span>
+        <span class="n">updateCompensatedCommands</span><span class="o">();</span>
+        <span class="n">deleteDuplicateSagaEndedEvents</span><span class="o">();</span>
+        <span class="n">updateTransactionStatus</span><span class="o">();</span>
+      <span class="o">}</span>
+    <span class="o">},</span>
+    <span class="mi">0</span><span class="o">,</span>
+    <span class="n">eventPollingInterval</span><span class="o">,</span>
+    <span class="no">MILLISECONDS</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>Construct NodeStatus in <code class="highlighter-rouge">AlphaConfig.java</code> by the following to ensure that the event scan will work regardless of whether you have configured the <code class="highlighter-rouge">alpha.cluster.master.enabled</code> parameter, Here you can see the node is a slave just after startup when cluster mode is enabled. Later, I will introduce how to switch to master.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nd">@Bean</span>
+  <span class="nc">NodeStatus</span> <span class="nf">nodeStatus</span> <span class="o">(){</span>
+    <span class="k">if</span><span class="o">(</span><span class="n">masterEnabled</span><span class="o">){</span>
+      <span class="k">return</span> <span class="k">new</span> <span class="nf">NodeStatus</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">SLAVE</span><span class="o">);</span>
+    <span class="o">}</span><span class="k">else</span><span class="o">{</span>
+      <span class="k">return</span> <span class="k">new</span> <span class="nf">NodeStatus</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">MASTER</span><span class="o">);</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Autowired</span>
+  <span class="nc">NodeStatus</span> <span class="n">nodeStatus</span><span class="o">;</span>
+</code></pre></div></div>
+
+<p><code class="highlighter-rouge">ClusterLockService.java</code> is in charge of node state switching, It periodically perform lock preemption and set the node as a master after successful preemption.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nd">@Autowired</span>
+  <span class="nc">LockProvider</span> <span class="n">lockProvider</span><span class="o">;</span>
+  <span class="o">...</span>
+  <span class="o">...</span>
+  <span class="nd">@Scheduled</span><span class="o">(</span><span class="n">cron</span> <span class="o">=</span> <span class="s">"0/1 * * * * ?"</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">masterCheck</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">if</span> <span class="o">(</span><span class="n">applicationReady</span><span class="o">)</span> <span class="o">{</span>
+      <span class="k">this</span><span class="o">.</span><span class="na">locker</span> <span class="o">=</span> <span class="n">lockProvider</span><span class="o">.</span><span class="na">lock</span><span class="o">(</span><span class="k">this</span><span class="o">.</span><span class="na">getMasterLock</span><span class="o">());</span>
+      <span class="k">if</span> <span class="o">(</span><span class="k">this</span><span class="o">.</span><span class="na">locker</span><span class="o">.</span><span class="na">isPresent</span><span class="o">())</span> <span class="o">{</span>
+        <span class="k">if</span> <span class="o">(!</span><span class="k">this</span><span class="o">.</span><span class="na">locked</span><span class="o">)</span> <span class="o">{</span>
+          <span class="k">this</span><span class="o">.</span><span class="na">locked</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
+          <span class="n">nodeStatus</span><span class="o">.</span><span class="na">setTypeEnum</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">MASTER</span><span class="o">);</span>
+          <span class="no">LOG</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Master Node"</span><span class="o">);</span>
+        <span class="o">}</span>
+        <span class="c1">//Keep locked</span>
+      <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
+        <span class="k">if</span> <span class="o">(</span><span class="k">this</span><span class="o">.</span><span class="na">locked</span> <span class="o">||</span> <span class="o">!</span><span class="n">lockExecuted</span><span class="o">)</span> <span class="o">{</span>
+          <span class="n">locked</span> <span class="o">=</span> <span class="kc">false</span><span class="o">;</span>
+          <span class="n">nodeStatus</span><span class="o">.</span><span class="na">setTypeEnum</span><span class="o">(</span><span class="nc">NodeStatus</span><span class="o">.</span><span class="na">TypeEnum</span><span class="o">.</span><span class="na">SLAVE</span><span class="o">);</span>
+          <span class="no">LOG</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"Slave Node"</span><span class="o">);</span>
+        <span class="o">}</span>
+      <span class="o">}</span>
+      <span class="n">lockExecuted</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+</code></pre></div></div>
+
+<h2 id="lock-architecture">Lock architecture</h2>
+
+<p>As you can see from the previous description, in the <code class="highlighter-rouge">masterCheck</code> method of <code class="highlighter-rouge">ClusterLockService.java</code>, get a lock by <code class="highlighter-rouge">this.locker = lockProvider.lock(this.getMasterLock());</code> and determine if the lock was successful.</p>
+
+<p><code class="highlighter-rouge">LockProvider.java</code> is an interface. Currently, we provide an implementation based on JDBC. The package structure and class dependencies are as follows:</p>
+
+<p><img src="/assets/images/2019-04-03-servicecomb-pack-cluster/cluster-package-structure.png" alt="cluster-package-structure" /></p>
+
+<p>Dependencies are as follows</p>
+
+<p><img src="/assets/images/2019-04-03-servicecomb-pack-cluster/class-dependency-1.png" alt="class-dependency-1" /></p>
+
+<ul>
+  <li>
+    <p>LockProvider.java</p>
+
+    <p>The interface defines the lock methods</p>
+  </li>
+  <li>
+    <p>LockProviderPersistence.java</p>
+
+    <p>The interface defines the following three persistence methods</p>
+
+    <ul>
+      <li>initLock Create a lock, try to lock and return whether the lock was successful</li>
+      <li>updateLock Update the lock, lock it again and return it successfully (the interface design of the update lock is designed for non-long connection lock design, for example, for locking according to a fixed period)</li>
+      <li>unLock</li>
+    </ul>
+  </li>
+  <li>
+    <p>AbstractLockProvider.java</p>
+
+    <p>Implemented the <code class="highlighter-rouge">LockProvider.java</code> interface and called the internal <code class="highlighter-rouge">LockProviderPersistence.java</code> interface for locking operations</p>
+  </li>
+</ul>
+
+<h2 id="jdbc-implementation">JDBC implementation</h2>
+
+<blockquote>
+  <p>I like to run with you, the same rhythm, the same heartbeat, I feel very good, when you fall behind, I lead everyone to run together</p>
+</blockquote>
+
+<ul>
+  <li>JDBC class diagram</li>
+</ul>
+
+<p><img src="/assets/images/2019-04-03-servicecomb-pack-cluster/class-dependency-2.png" alt="class-dependency-2" /></p>
+
+<ul>
+  <li>
+    <p>JdbcLockPersistence.java</p>
+
+    <p>Implement <code class="highlighter-rouge">LockProviderPersistence.java</code> interface operation database</p>
+  </li>
+  <li>
+    <p>JdbcLockProvider.java</p>
+
+    <p>Inherit the abstract class <code class="highlighter-rouge">AbstractLockProvider.java</code>, passing the <code class="highlighter-rouge">LockProviderPersistence.java</code> interface implementation class <code class="highlighter-rouge">JdbcLockPersistence</code> in the constructor.</p>
+  </li>
+  <li>
+    <p>LockProviderJdbcConfiguration.java</p>
+
+    <p>Declare a LockProvider Bean with @Configuration</p>
+  </li>
+  <li>
+    <p>JPA</p>
+
+    <p>MasterLockEntityRepository.java、SpringMasterLockRepository.java、org.apache.servicecomb.pack.alpha.server.cluster.master.provider.jdbc.jpa.*</p>
+  </li>
+  <li>
+    <p>Create master_lock Table</p>
+  </li>
+</ul>
+
+<div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="n">IF</span> <span class="k">NOT</span> <span class="k">EXISTS</span> <span class="n">master_lock</span> <span class="p">(</span>
+  <span class="n">serviceName</span> <span class="nb">varchar</span><span class="p">(</span><span class="mi">36</span><span class="p">)</span> <span class="k">not</span> <span class="k">NULL</span><span class="p">,</span>
+  <span class="n">expireTime</span> <span class="nb">datetime</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="k">DEFAULT</span> <span class="k">CURRENT_TIMESTAMP</span><span class="p">,</span>
+  <span class="n">lockedTime</span> <span class="nb">datetime</span> <span class="k">NOT</span> <span class="k">NULL</span> <span class="k">DEFAULT</span> <span class="k">CURRENT_TIMESTAMP</span><span class="p">,</span>
+  <span class="n">instanceId</span>  <span class="nb">varchar</span><span class="p">(</span><span class="mi">255</span><span class="p">)</span> <span class="k">not</span> <span class="k">NULL</span><span class="p">,</span>
+  <span class="k">PRIMARY</span> <span class="k">KEY</span> <span class="p">(</span><span class="n">serviceName</span><span class="p">)</span>
+<span class="p">)</span> <span class="n">ENGINE</span><span class="o">=</span><span class="n">InnoDB</span> <span class="k">DEFAULT</span> <span class="n">CHARSET</span><span class="o">=</span><span class="n">utf8</span><span class="p">;</span>
+</code></pre></div></div>
+
+<ul>
+  <li>serviceName Service name, this field takes the value <code class="highlighter-rouge">$ {spring.application.name}</code></li>
+  <li>expireTime Lock expiration time, this field takes value lockedTime + 5s</li>
+  <li>lockedTime Last lock time</li>
+  <li>instanceId Service instance ID, this field takes the value <code class="highlighter-rouge">$ {alpha.server.host}]:$ {alpha.server.port}</code></li>
+</ul>
+
+<h2 id="lock-processing">Lock processing</h2>
+
+<p>The process of locking/updating a lock is a cyclically repeating action, as follows:</p>
+
+<ul>
+  <li>
+    <p><code class="highlighter-rouge">ClusterLockService.java</code> calls the lock method of <code class="highlighter-rouge">LockProvider.java</code> interface once per second</p>
+  </li>
+  <li>
+    <p>The lock method in the abstract class <code class="highlighter-rouge">AbstractLockProvider.java</code> will attempt to lock the iniLock method of <code class="highlighter-rouge">JdbcLockPersistence.java</code>, and the locked SQL implementation is defined in <code class="highlighter-rouge">MasterLockEntityRepository.java</code></p>
+
+    <ul>
+      <li>If the table is empty then insert a record and return the lock successfully</li>
+      <li>Exception caught and lock failed if there are records with the same service name field in the table</li>
+    </ul>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="nd">@Transactional</span>
+   <span class="nd">@Modifying</span>
+   <span class="nd">@Query</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"INSERT INTO master_lock "</span>
+       <span class="o">+</span> <span class="s">"(serviceName, expireTime, lockedTime, instanceId) "</span>
+       <span class="o">+</span> <span class="s">"VALUES "</span>
+       <span class="o">+</span> <span class="s">"(?1, ?2, ?3, ?4)"</span><span class="o">,</span> <span class="n">nativeQuery</span> <span class="o">=</span> <span class="kc">true</span><span class="o">)</span>
+   <span class="kt">int</span> <span class="nf">initLock</span><span class="o">(</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"serviceName"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"expireTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">expireTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"lockedTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">lockedTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"instanceId"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">instanceId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>If the initLock lock fails, try to update the lock by calling the updateLock method in <code class="highlighter-rouge">MasterLockEntityRepository.java</code>.</p>
+
+    <ul>
+      <li>If the record instanceId of the same service name is the same as the instance instanceId, the update succeeds and the lock is successfully returned.</li>
+      <li>If the record expireTime of the same service name is less than the current lock time, the update is successful and the lock is successful.</li>
+    </ul>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="nd">@Transactional</span>
+   <span class="nd">@Modifying</span><span class="o">(</span><span class="n">clearAutomatically</span> <span class="o">=</span> <span class="kc">true</span><span class="o">)</span>
+   <span class="nd">@Query</span><span class="o">(</span><span class="s">"UPDATE org.apache.servicecomb.pack.alpha.server.cluster.master.provider.jdbc.jpa.MasterLock t "</span>
+       <span class="o">+</span> <span class="s">"SET t.expireTime = :expireTime"</span>
+       <span class="o">+</span> <span class="s">",t.lockedTime = :lockedTime "</span>
+       <span class="o">+</span> <span class="s">",t.instanceId = :instanceId "</span>
+       <span class="o">+</span> <span class="s">"WHERE t.serviceName = :serviceName AND (t.expireTime &lt;= :lockedTime OR t.instanceId = :instanceId)"</span><span class="o">)</span>
+   <span class="kt">int</span> <span class="nf">updateLock</span><span class="o">(</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"serviceName"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"lockedTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">lockedTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"expireTime"</span><span class="o">)</span> <span class="nc">Date</span> <span class="n">expireTime</span><span class="o">,</span>
+       <span class="nd">@Param</span><span class="o">(</span><span class="s">"instanceId"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">instanceId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>UnLock</p>
+
+    <p>Reserved interface for extending other ways of locking</p>
+  </li>
+</ul>
+
+<h2 id="other-lock-implementations">Other lock implementations</h2>
+
+<p>Other types of locks can be implemented through the <code class="highlighter-rouge">LockProvider.java</code> and <code class="highlighter-rouge">LockProviderPersistence.java</code> interfaces, such as zookeeper or redis etc.</p>
+
+<h2 id="note">Note</h2>
+
+<ul>
+  <li>
+    <p>Need to synchronize time across multiple servers</p>
+  </li>
+  <li>
+    <p>Need to configure the correct time zone parameters when using MySQL database</p>
+  </li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
+  
+
+
+  
+  
+  
+
+  <p class="page__taxonomy">
+    <strong><i class="fa fa-fw fa-tags" aria-hidden="true"></i> Tags: </strong>
+    <span itemprop="keywords">
+    
+      
+      
+      <a href="/tags/#cluster" class="page__taxonomy-item" rel="tag">Cluster</a><span class="sep">, </span>
+    
+      
+      
+      <a href="/tags/#servicecomb-pack" class="page__taxonomy-item" rel="tag">ServiceComb Pack</a>
+    
+    </span>
+  </p>
+
+
+
+
+
+        
+          
+            
+              <p class="page__date"><strong><i class="fa fa-fw fa-calendar" aria-hidden="true"></i> Updated:</strong> <time datetime="2019-04-11">April 11, 2019</time></p>
+            
+          
+        
+      </footer>
+
+      <section class="page__share">
+  
+    <h4 class="page__share-title">Share on</h4>
+  
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+    <meta itemprop="description" content="ServiceComb Pack Integrated Discovery Service Consul">
+    <meta itemprop="datePublished" content="April 12, 2019">
+    <meta itemprop="dateModified" content="April 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack 0.4.0 Integrated Discovery Service : Consul
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>ServiceComb Pack supports the registration of Alpha service instances to Consul from version 0.4.0, and Omega-side programs can visit Alpha with Consul</p>
+
+<h3 id="run-consul">Run Consul</h3>
+
+<ul>
+  <li>Start Consul with Docker, please refer to the official website <a href="https://www.consul.io">https://www.consul.io</a> for more ways</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 8500:8500 consul
+</code></pre></div></div>
+
+<ul>
+  <li>Consul UI</li>
+</ul>
+
+<p>Visit http://0.0.0.0:8500 in the browser, you can see the following page indicates that Consul started successfully</p>
+
+<p><img src="/assets/images/2019-04-12-servicecomb-pack-consul/consul_main.png" alt="consul_main" /></p>
+
+<h3 id="run-alpha">Run Alpha</h3>
+
+<p>Enable registration to Consul with the parameter <code class="highlighter-rouge">spring.cloud.consul.enabled = true</code></p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-exec.jar <span class="se">\</span>
+  <span class="nt">--server</span>.port<span class="o">=</span>8090 <span class="se">\</span>
+  <span class="nt">--alpha</span>.server.port<span class="o">=</span>8080 <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+  <span class="nt">--spring</span>.cloud.consul.enabled<span class="o">=</span><span class="nb">true</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.cloud.consul.host<span class="o">=</span>0.0.0.0 <span class="se">\</span>
+  <span class="nt">--spring</span>.cloud.consul.port<span class="o">=</span>8500 <span class="se">\</span>
+  <span class="nt">--spring</span>.profiles.active<span class="o">=</span>prd 
+</code></pre></div></div>
+<p><strong>Note:</strong> Check out for Consul more details <a href="https://cloud.spring.io/spring-cloud-consul/spring-cloud-consul.html">Spring Cloud Consul 2.x</a> <a href="https://cloud.spring.io/spring-cloud-consul/1.3.x/single/spring-cloud-consul.html">Spring Cloud Consul 1.x</a></p>
+
+<p>After Alpha is launched, you can see that you have registered to Consul</p>
+
+<p><img src="/assets/images/2019-04-12-servicecomb-pack-consul/alpha_register_to_consul.png" alt="alpha_register_to_consul" /></p>
+
+<p>Use <code class="highlighter-rouge">curl http://0.0.0.0:8500/v1/agent/services</code> You can see that Alpha’s gRPC address and port have been registered in Consul’s Tags</p>
+
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+    </span><span class="nl">"servicecomb-alpha-server-0-0-0-0-336b06581fb5b92ed91c7ade3fdafa88"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+        </span><span class="nl">"ID"</span><span class="p">:</span><span class="w"> </span><span class="s2">"servicecomb-alpha-server-0-0-0-0-336b06581fb5b92ed91c7ade3fdafa88"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Service"</span><span class="p">:</span><span class="w"> </span><span class="s2">"servicecomb-alpha-server"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Tags"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+            </span><span class="s2">"alpha-server-host=0.0.0.0"</span><span class="p">,</span><span class="w">
+            </span><span class="s2">"alpha-server-port=8080"</span><span class="p">,</span><span class="w">
+            </span><span class="s2">"secure=false"</span><span class="w">
+        </span><span class="p">],</span><span class="w">
+        </span><span class="nl">"Meta"</span><span class="p">:</span><span class="w"> </span><span class="p">{},</span><span class="w">
+        </span><span class="nl">"Port"</span><span class="p">:</span><span class="w"> </span><span class="mi">8090</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"192.168.1.116"</span><span class="p">,</span><span class="w">
+        </span><span class="nl">"Weights"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"Passing"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"Warning"</span><span class="p">:</span><span class="w"> </span><span class="mi">1</span><span class="w">
+        </span><span class="p">},</span><span class="w">
+        </span><span class="nl">"EnableTagOverride"</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="w">
+    </span><span class="p">}</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<h3 id="configuring-the-omega-side">Configuring the Omega side</h3>
+
+<blockquote>
+  <p>ServiceComb Pack 0.4.0 Omega defaults use Spring Boot 2.x Spring and Cloud Consul 2.x, If your Omega side project base on Spring Boot 1.x you can use <code class="highlighter-rouge">-Pspring-boot-1</code> to rebuild ServiceComb Pack to Spring Boot 1.x and Spring Cloud Consul 1.x</p>
+</blockquote>
+
+<p>Modify the original omega project</p>
+
+<p>add dependencies</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+	<span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.pack<span class="nt">&lt;/groupId&gt;</span>
+	<span class="nt">&lt;artifactId&gt;</span>omega-spring-cloud-consul-starter<span class="nt">&lt;/artifactId&gt;</span>
+	<span class="nt">&lt;version&gt;</span>${pack.version}<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>Add the following to <code class="highlighter-rouge">application.yaml</code></p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spring</span><span class="pi">:</span>
+  <span class="na">cloud</span><span class="pi">:</span>
+    <span class="na">consul</span><span class="pi">:</span>
+      <span class="na">discovery</span><span class="pi">:</span>
+<span class="err">      	</span><span class="na">register</span><span class="pi">:</span> <span class="no">false</span>
+      <span class="s">host</span><span class="pi">:</span> <span class="s">0.0.0.0</span>
+      <span class="s">port</span><span class="pi">:</span> <span class="m">8500</span>
+      
+<span class="na">alpha</span><span class="pi">:</span>
+  <span class="na">cluster</span><span class="pi">:</span>
+    <span class="na">register</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">consul</span>
+</code></pre></div></div>
+
+<ul>
+  <li>
+    <p><code class="highlighter-rouge">spring.cloud.consul.host</code> property is set to the Consul server’s instance address, <code class="highlighter-rouge">spring.cloud.consul.port</code> property is set to the Consul server’s instance port, <code class="highlighter-rouge">spring.cloud.consul.discovery.register=false</code> property is not register yourself , check out Spring Boot’s  <a href="https://cloud.spring.io/spring-cloud-consul/spring-cloud-consul.html">Spring Cloud Consul 2.x</a>  or <a href="https://cloud.spring.io/spring-cloud-consul/1.3.x/single/spring-cloud-consul.html">Spring Cloud Consul 1.x</a> for more details.</p>
+  </li>
+  <li>
+    <p><code class="highlighter-rouge">alpha.cluster.register.type=consul</code>  property is omega gets Alpha gRPC address from Consul</p>
+  </li>
+  <li>
+    <p>spring boot version compatible</p>
+  </li>
+</ul>
+
+<p>If your project is not using spring boot 2.1.1, please refer to this list to add a compatible spring-cloud-starter-consul-discovery version</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>spring boot</th>
+      <th>spring-cloud-starter-consul-discovery</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>2.1.x.RELEASE</td>
+      <td>2.1.1.RELEASE</td>
+    </tr>
+    <tr>
+      <td>2.0.x.RELEASE</td>
+      <td>2.0.2.RELEASE</td>
+    </tr>
+  </tbody>
+</table>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="nt">&lt;dependencyManagement&gt;</span>
+     <span class="nt">&lt;dependencies&gt;</span>
+       <span class="nt">&lt;dependency&gt;</span>
+         <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>
+         <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-consul-discovery<span class="nt">&lt;/artifactId&gt;</span>
+         <span class="nt">&lt;version&gt;</span>2.0.2.RELEASE<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;/dependency&gt;</span>
+     <span class="nt">&lt;/dependencies&gt;</span>
+   <span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div></div>
+
+<p><strong>Note:</strong> If you define <code class="highlighter-rouge">spring.application.name</code> parameter when start Alpha,  You need to specify this service name in Omega via the parameter <code class="highlighter-rouge">alpha.cluster.serviceId</code></p>
+
+        
+      </section>
+
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+
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+      
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+            <h1 class="page__title" itemprop="headline">ServiceComb Pack 0.4.0 Integrated Discovery Service : Eureka
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>ServiceComb Pack supports the registration of Alpha service instances to Eureka from version 0.4.0, and Omega-side programs can visit Alpha with Eureka</p>
+
+<h3 id="compile-with-eureka">Compile with Eureka</h3>
+
+<p>Pack doesn’t include Eureka support by default，you can use profile <code class="highlighter-rouge">-Pspring-cloud-eureka</code> to enable the feature of eureka when building the code of Pack.</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-pack.git
+<span class="nb">cd </span>servicecomb-pack
+mvn clean <span class="nb">install</span> <span class="nt">-DskipTests</span><span class="o">=</span><span class="nb">true</span> <span class="nt">-Pspring-boot-2</span>,spring-cloud-eureka
+</code></pre></div></div>
+
+<h3 id="run-eureka">Run Eureka</h3>
+
+<ul>
+  <li>Start Eureka with Docker, please refer to the official website <a href="https://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html#spring-cloud-eureka-server">https://cloud.spring.io</a> for more information.</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker run <span class="nt">-d</span> <span class="nt">-p</span> 8761:8761 springcloud/eureka
+</code></pre></div></div>
+
+<ul>
+  <li>Eureka UI</li>
+</ul>
+
+<p>Visit http://0.0.0.0:8761 in the browser, you can see the following page shows that Eureka is started successfully</p>
+
+<p><img src="/assets/images/2019-04-15-servicecomb-pack-eureka/eureka-main.png" alt="eureka_main" /></p>
+
+<h3 id="run-alpha">Run Alpha</h3>
+
+<p>Enable registration to Eureka with the configuration of <code class="highlighter-rouge">eureka.client.enabled=true</code></p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>java <span class="nt">-jar</span> alpha-server-0.4.0-exec.jar <span class="se">\</span>
+  <span class="nt">--server</span>.port<span class="o">=</span>8090 <span class="se">\</span>
+  <span class="nt">--alpha</span>.server.port<span class="o">=</span>8080 <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.url<span class="o">=</span><span class="s2">"jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false"</span> <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.username<span class="o">=</span>saga-user <span class="se">\</span>
+  <span class="nt">--spring</span>.datasource.password<span class="o">=</span>saga-password <span class="se">\</span>
+  <span class="nt">--eureka</span>.client.enabled<span class="o">=</span><span class="nb">true</span> <span class="se">\</span>
+  <span class="nt">--eureka</span>.client.service-url.defaultZone<span class="o">=</span>http://0.0.0.0:8761/eureka <span class="se">\</span>
+  <span class="nt">--spring</span>.profiles.active<span class="o">=</span>prd 
+</code></pre></div></div>
+<p><strong>Note:</strong> Check out for Eureka more details <a href="https://cloud.spring.io/spring-cloud-netflix/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 2.x</a> <a href="https://cloud.spring.io/spring-cloud-netflix/1.4.x/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 1.x</a></p>
+
+<p>After Alpha is launched, you can see that you have registered to Eureka</p>
+
+<p><img src="/assets/images/2019-04-15-servicecomb-pack-eureka/alpha_register_to_eureka.png" alt="alpha_register_to_eureka" /></p>
+
+<p>Use <code class="highlighter-rouge">curl http://127.0.0.1:8761/eureka/apps/</code> You can see that Alpha’s gRPC service address and port have been registered in Eureka’s Metadata</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;applications&gt;</span>
+  <span class="nt">&lt;versions__delta&gt;</span>1<span class="nt">&lt;/versions__delta&gt;</span>
+  <span class="nt">&lt;apps__hashcode&gt;</span>UP_1_<span class="nt">&lt;/apps__hashcode&gt;</span>
+  <span class="nt">&lt;application&gt;</span>
+    <span class="nt">&lt;name&gt;</span>SERVICECOMB-ALPHA-SERVER<span class="nt">&lt;/name&gt;</span>
+    <span class="nt">&lt;instance&gt;</span>
+      <span class="nt">&lt;hostName&gt;</span>10.50.8.23<span class="nt">&lt;/hostName&gt;</span>
+      <span class="nt">&lt;app&gt;</span>SERVICECOMB-ALPHA-SERVER<span class="nt">&lt;/app&gt;</span>
+      <span class="nt">&lt;ipAddr&gt;</span>10.50.8.23<span class="nt">&lt;/ipAddr&gt;</span>
+      <span class="nt">&lt;status&gt;</span>UP<span class="nt">&lt;/status&gt;</span>
+      <span class="nt">&lt;overriddenstatus&gt;</span>UNKNOWN<span class="nt">&lt;/overriddenstatus&gt;</span>
+      <span class="nt">&lt;port</span> <span class="na">enabled=</span><span class="s">"true"</span><span class="nt">&gt;</span>8090<span class="nt">&lt;/port&gt;</span>
+      <span class="nt">&lt;securePort</span> <span class="na">enabled=</span><span class="s">"false"</span><span class="nt">&gt;</span>443<span class="nt">&lt;/securePort&gt;</span>
+      <span class="nt">&lt;countryId&gt;</span>1<span class="nt">&lt;/countryId&gt;</span>
+      <span class="nt">&lt;dataCenterInfo</span> <span class="na">class=</span><span class="s">"com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo"</span><span class="nt">&gt;</span>
+        <span class="nt">&lt;name&gt;</span>MyOwn<span class="nt">&lt;/name&gt;</span>
+      <span class="nt">&lt;/dataCenterInfo&gt;</span>
+      <span class="nt">&lt;leaseInfo&gt;</span>
+        <span class="nt">&lt;renewalIntervalInSecs&gt;</span>30<span class="nt">&lt;/renewalIntervalInSecs&gt;</span>
+        <span class="nt">&lt;durationInSecs&gt;</span>90<span class="nt">&lt;/durationInSecs&gt;</span>
+        <span class="nt">&lt;registrationTimestamp&gt;</span>1555317761365<span class="nt">&lt;/registrationTimestamp&gt;</span>
+        <span class="nt">&lt;lastRenewalTimestamp&gt;</span>1555317761365<span class="nt">&lt;/lastRenewalTimestamp&gt;</span>
+        <span class="nt">&lt;evictionTimestamp&gt;</span>0<span class="nt">&lt;/evictionTimestamp&gt;</span>
+        <span class="nt">&lt;serviceUpTimestamp&gt;</span>1555317761067<span class="nt">&lt;/serviceUpTimestamp&gt;</span>
+      <span class="nt">&lt;/leaseInfo&gt;</span>
+      <span class="nt">&lt;metadata&gt;</span>
+        <span class="nt">&lt;management.port&gt;</span>8090<span class="nt">&lt;/management.port&gt;</span>
+        <span class="nt">&lt;servicecomb-alpha-server&gt;</span>0.0.0.0:8080<span class="nt">&lt;/servicecomb-alpha-server&gt;</span>
+      <span class="nt">&lt;/metadata&gt;</span>
+      <span class="nt">&lt;homePageUrl&gt;</span>http://10.50.8.23:8090/<span class="nt">&lt;/homePageUrl&gt;</span>
+      <span class="nt">&lt;statusPageUrl&gt;</span>http://10.50.8.23:8090/actuator/info<span class="nt">&lt;/statusPageUrl&gt;</span>
+      <span class="nt">&lt;healthCheckUrl&gt;</span>http://10.50.8.23:8090/actuator/health<span class="nt">&lt;/healthCheckUrl&gt;</span>
+      <span class="nt">&lt;vipAddress&gt;</span>servicecomb-alpha-server<span class="nt">&lt;/vipAddress&gt;</span>
+      <span class="nt">&lt;secureVipAddress&gt;</span>servicecomb-alpha-server<span class="nt">&lt;/secureVipAddress&gt;</span>
+      <span class="nt">&lt;isCoordinatingDiscoveryServer&gt;</span>false<span class="nt">&lt;/isCoordinatingDiscoveryServer&gt;</span>
+      <span class="nt">&lt;lastUpdatedTimestamp&gt;</span>1555317761365<span class="nt">&lt;/lastUpdatedTimestamp&gt;</span>
+      <span class="nt">&lt;lastDirtyTimestamp&gt;</span>1555317760932<span class="nt">&lt;/lastDirtyTimestamp&gt;</span>
+      <span class="nt">&lt;actionType&gt;</span>ADDED<span class="nt">&lt;/actionType&gt;</span>
+    <span class="nt">&lt;/instance&gt;</span>
+  <span class="nt">&lt;/application&gt;</span>
+<span class="nt">&lt;/applications&gt;</span>
+</code></pre></div></div>
+
+<h3 id="configuring-the-omega-side">Configuring the Omega side</h3>
+
+<blockquote>
+  <p>ServiceComb Pack 0.4.0 Omega defaults use Spring Boot 2.x Spring and Spring Cloud Netflix 2.x, If your Omega side project base on Spring Boot 1.x you can use <code class="highlighter-rouge">-Pspring-boot-1</code> to rebuild ServiceComb Pack to Spring Boot 1.x and Spring Cloud Netflix 1.x</p>
+</blockquote>
+
+<p>Modify the original omega project</p>
+
+<p>add dependencies</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.pack<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>omega-spring-cloud-eureka-starter<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>${pack.version}<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>Add the following to <code class="highlighter-rouge">application.yaml</code></p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">eureka</span><span class="pi">:</span>
+  <span class="na">client</span><span class="pi">:</span>
+    <span class="na">service-url</span><span class="pi">:</span>
+      <span class="na">defaultZone</span><span class="pi">:</span> <span class="s">http://127.0.0.1:8761/eureka</span>
+<span class="na">alpha</span><span class="pi">:</span>
+  <span class="na">cluster</span><span class="pi">:</span>
+    <span class="na">register</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">eureka</span>
+</code></pre></div></div>
+
+<ul>
+  <li>
+    <p><code class="highlighter-rouge">eureka.client.service-url.defaultZone</code> property is set to the Eureka server’s instance address, check out Spring Boot’s  <a href="https://cloud.spring.io/spring-cloud-netflix/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 2.x</a> or <a href="https://cloud.spring.io/spring-cloud-netflix/1.4.x/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter">Spring Cloud Netflix 1.x</a> for more details.</p>
+  </li>
+  <li>
+    <p><code class="highlighter-rouge">alpha.cluster.register.type=eureka</code>  property is omega gets alpha gRPC address from Eureka</p>
+  </li>
+  <li>
+    <p>spring boot version compatible</p>
+  </li>
+</ul>
+
+<p>If your project is not using spring boot 2.1.1, please refer to this list to add a compatible spring-cloud-starter-netflix-eureka-client version</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>spring boot</th>
+      <th>spring-cloud-starter-netflix-eureka-client</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>2.1.x.RELEASE</td>
+      <td>2.1.1.RELEASE</td>
+    </tr>
+    <tr>
+      <td>2.0.x.RELEASE</td>
+      <td>2.0.3.RELEASE</td>
+    </tr>
+  </tbody>
+</table>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-netflix-eureka-client<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>2.0.3.RELEASE<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+<span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div></div>
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content/docs/stress-test-on-company-with-jmeter-in-k8s/index.html

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+    <meta itemprop="headline" content="Stress test on Company Demo with Jmeter in Kubernetes Cluster">
+    <meta itemprop="description" content="An introduction of how to do stress test on company demo with jmeter in kubernetes cluster">
+    <meta itemprop="datePublished" content="August 25, 2017">
+    <meta itemprop="dateModified" content="August 25, 2017">
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+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Stress test on Company Demo with Jmeter in Kubernetes Cluster
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="background">Background</h2>
+
+<p>Stress test is an effective way to evaluate the performance of web applications. Besides, more and more web applications are decomposed into several microservices and performance of each microservice may vary as some are compute intensive while some are IO intensive.</p>
+
+<p>Stress test on web application based on microservice architecture plays a more important role. This blog will evaluate the performance of our <a href="https://github.com/ServiceComb/ServiceComb-Company-WorkShop">company demo</a> using <a href="https://www.google.com.hk/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=1&amp;ved=0ahUKEwiv9rjg7u_VAhUkxoMKHfoYDaYQFggvMAA&amp;url=http%3A%2F%2Fjmeter.apache.org%2F&amp;usg=AFQjCNHIHCOA-F9LnhaAn_STCWyPPgOpdw">JMeter 3.2</a>(a powerful stress test tool) in <a href="https://kubernetes.io/">Kubernetes</a> cluster.</p>
+
+<p>From the <a href="http://servicecomb.io/docs/autoscale-on-company/">last post</a>, we figured out the Manager service demands the most of the resources. Hence, in this plan, we will dig deeper into performance test on the Manager service.</p>
+
+<h2 id="test-plan">Test Plan</h2>
+
+<p>Our JMeter test plan is:</p>
+
+<ul>
+  <li>
+    <p>Handle the authentication before stress tests as the authentication may introduce serious delay.</p>
+  </li>
+  <li>
+    <p>Keep visiting services in Company demo concurrently, push stress on the Manager services by QueryWorker, QueryBeekeeperDrone, QueryBeekeeperQueen HTTP request generator.</p>
+  </li>
+</ul>
+
+<p>You can get the test plan from github.</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  git clone https://github.com/ServiceComb/ServiceComb-Company-WorkShop
+  <span class="nb">cd </span>ServiceComb-Company-WorkShop/stress-tests
+</code></pre></div></div>
+<p class="figure-caption"><img src="/assets/images/company_test_plan.png" alt="fig-1 JMeter test plan" class="align-center" />
+fig-1 JMeter test plan</p>
+
+<p>At the very first of our test plan, we set up some global configurations that shared among all thread groups. The <em>CSV Data Set Config</em> loads our target server information from a local csv file. The <em>HTTP Request Defaults</em> sets up the default host and port in every request. The <em>User Defined Variables</em> defines variable that shared globally. The <em>HTTP Header Manager</em>  adds headers define inside it to every request.</p>
+
+<p>Then comes to the <em>setUp</em> thread group. It does the authentication job. The build-in way to authenticate in JMeter is the <em>HTTP Cookie Manager</em> as cookie is being used widely over web applications. However, our workshop demo uses the token based authentication instead of cookie based authentication. We need to take a detour to get authenticate done in JMeter.   The <em>Remove header pre processor</em> uses the following script to avoid unnecessary headers being injected into login requests.</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>import org.apache.jmeter.protocol.http.control.Header<span class="p">;</span>
+sampler.getHeaderManager<span class="o">()</span>.removeHeaderNamed<span class="o">(</span><span class="s2">"Authorization"</span><span class="o">)</span><span class="p">;</span>
+</code></pre></div></div>
+
+<p>Then we retrieve login credential in the <em>Set up Login</em> request. The <em>authorization_extractor</em> is a <em>Regular Expression Extractor</em> used to extract the value of <em>Authorization</em> header. As variables can not pass from one thread group to another, it need to convert to the global property and the script in <em>BeanShell PostProcessor</em> does the job.</p>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">${</span><span class="nv">__setProperty</span><span class="p">(Authorization,</span><span class="k">${</span><span class="nv">Authorization</span><span class="k">}</span><span class="p">,)</span><span class="k">}</span>
+</code></pre></div></div>
+
+<p>The last part of our test plan is the stress tests perform on our services.  We test three endpoints as they all pass from the manager service to the other two microservices, namely worker and beekeeper. Before we test, we disable the caching capability by enabling <em>StressTest</em> profile in manager so that the worker service and beekeeper service can serve the incoming computing task all the time.  Besides, we simplify the computing task by setting the request argument to be just 1.</p>
+
+<h2 id="test-steps">Test Steps</h2>
+
+<ul>
+  <li>
+    <p>Start the <em>Company demo</em> in the Kubernetes cluster without resource limits.</p>
+  </li>
+  <li>
+    <p>Replace the content of <em>hosts.csv</em> file with the IP address and port of the Company demo running in the Kubernetes cluster. The content in <em>hosts.csv</em> is:</p>
+
+    <pre><code class="language-csv"> 127.0.0.1,8083
+</code></pre>
+  </li>
+  <li>
+    <p>Run the tests. Using 200 threads to generate requests concurrently, and set the duration to be 600 seconds.</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code> jmeter <span class="nt">-n</span> <span class="nt">-t</span> workshop.jmx <span class="nt">-j</span> workshop.log <span class="nt">-l</span> workshop.jtl <span class="nt">-Jthreads</span><span class="o">=</span>200 <span class="nt">-Jduration</span><span class="o">=</span>600
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="test-results">Test Results</h2>
+<p>The performance among various concurrency is as follows:</p>
+
+<p class="figure-caption"><img src="/assets/images/company_concurrency_performance.png" alt="fig-2 Performance among various concurrency" class="align-center" />
+fig-2 Performance among various concurrency</p>
+
+<p>fig-2 shows that performance of manager service remained stable until it reached the bottleneck(at concurrency of 15), it speeds up to <strong>about 1000 requests per seconds</strong> while keeping the average response time low. Later on, as the concurrency increased, the average response time increased dramatically. <strong>The response time statistics can be helpful when evaluating the circuit-break timeout settings.</strong></p>
+
+<p class="figure-caption"><img src="/assets/images/company_response_time.png" alt="fig-3 Average response time among different services" class="align-center" />
+fig-3 Average response time among different services</p>
+
+<p>fig-3 shows the average response time of different services. As the beekeeper service relies on the worker service, it had a longer response time than the worker service.</p>
+
+<p class="figure-caption"><img src="/assets/images/company_cpu_load.png" alt="fig-4 CPU Load on various concurrency" class="align-center" />
+fig-4 CPU Load on various concurrency</p>
+
+<p>To find out why the performance stuck at the concurrency of 15, we checked the monitor data from <a href="https://github.com/kubernetes/heapster">Heapster</a> as fig-4 shows. Apparently, <strong>manager service became the bottleneck of the whole system.</strong> It reached the maximum cpu load when the throughput was around 1000 req/s. Other services increased much slower than manager service and required less resources.</p>
+
+<p>As manager service logs directly to the stdout and the JMeter test client running on a single host may not simulate enough concurrency simultaneously. As such, we tested on different scenes of log settings(log4j1 stdout, log4j2 stdout, log4j2 asynchronous, none) at the concurrency of 200. The <em>asynchronous</em> log settings in <em>log4j2.xml</em> file is as follows:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8" ?&gt;</span>
+<span class="nt">&lt;Configuration</span> <span class="na">status=</span><span class="s">"INFO"</span><span class="nt">&gt;</span>
+  <span class="nt">&lt;Appenders&gt;</span>
+    <span class="nt">&lt;RandomAccessFile</span> <span class="na">name=</span><span class="s">"RandomAccessFile"</span> <span class="na">fileName=</span><span class="s">"manager.log"</span> <span class="na">immediateFlush=</span><span class="s">"false"</span> <span class="na">append=</span><span class="s">"false"</span><span class="nt">&gt;</span>
+      <span class="nt">&lt;PatternLayout</span> <span class="na">pattern=</span><span class="s">"%d [%p] %m %l%n"</span><span class="nt">/&gt;</span>
+    <span class="nt">&lt;/RandomAccessFile&gt;</span>
+  <span class="nt">&lt;/Appenders&gt;</span>
+  <span class="nt">&lt;Loggers&gt;</span>
+    <span class="nt">&lt;asyncRoot</span> <span class="na">level=</span><span class="s">"info"</span><span class="nt">&gt;</span>
+      <span class="nt">&lt;AppenderRef</span> <span class="na">ref=</span><span class="s">"RandomAccessFile"</span><span class="nt">/&gt;</span>
+    <span class="nt">&lt;/asyncRoot&gt;</span>
+  <span class="nt">&lt;/Loggers&gt;</span>
+<span class="nt">&lt;/Configuration&gt;</span>
+</code></pre></div></div>
+<p>Besides, we also need to add the <em>disruptor</em> dependency to enable the asynchronous log settings.</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>com.lmax<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>disruptor<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>3.3.6<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>The <em>none</em> log settings just replace the <em>info</em> logging level to <em>off</em> in the above setting. We also tested on distributed JMeter test client environment. Running Jmeter in distributed mode takes two steps:</p>
+
+<ol>
+  <li>
+    <p>run JMeter slave on each test node, the command is as follows:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jmeter-server <span class="nt">-Djava</span>.rmi.server.hostname<span class="o">=</span><span class="si">$(</span>ifconfig eth0 | <span class="nb">grep</span> <span class="s2">"inet addr"</span> | <span class="nb">awk</span> <span class="s1">'{print $2}'</span> | <span class="nb">cut</span> <span class="nt">-d</span> <span class="s2">":"</span> <span class="nt">-f2</span><span class="si">)</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>run JMeter master, the command is as follows:</p>
+
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>jmeter <span class="nt">-n</span> <span class="nt">-R</span> host1,host2 <span class="nt">-t</span> workshop.jmx <span class="nt">-j</span> workshop.log <span class="nt">-l</span> workshop.jtl <span class="nt">-Gmin</span><span class="o">=</span>1 <span class="nt">-Gmax</span><span class="o">=</span>2 <span class="nt">-Gthreads</span><span class="o">=</span>200 <span class="nt">-Gduration</span><span class="o">=</span>600
+</code></pre></div>    </div>
+
+    <p class="notice--warning"><em>Note:</em> JMeter property does not work in distributed mode. It needs to be declared as a global property. That’s why We use <em>-G</em> option  here instead of <em>-J</em> option.</p>
+  </li>
+</ol>
+
+<p>The results are as follows:
+<img src="/assets/images/company_log_and_jmeter.png" alt="different log and different JMeter settings" class="align-center" />
+From the above figure, we can conclude that:</p>
+
+<ul>
+  <li>
+    <p>The performance in JMeter distributed mode and single mode are so close, it seems that a single JMeter test client is able to simulate enough concurrency for the current test.</p>
+  </li>
+  <li>
+    <p>The log takes up too many computing resources when directly output to stdout and the asynchronous way has improved nearly 100% throughput of the original. <strong>Seems like using the synchronous log settings may not be wise in production environment.</strong></p>
+  </li>
+  <li>
+    <p>The log4j2 has improved about 40% throughput of the log4j1 and reduced a small amount of memory. Hence, <strong>it’s recommended to replace the log4j1 with log4j2 for the sake of performance.</strong></p>
+  </li>
+</ul>
+
+<p class="figure-caption"><img src="/assets/images/company_different_log_memory_usage.png" alt="fig-5 memory usage of different log settings" class="align-center" />
+fig-5 memory usage of different log settings</p>
+
+<p>Although the asynchronous way save us much computing resources, it takes up a great deal of memory in the meanwhile as fig-5 shows.</p>
+
+<p class="figure-caption"><img src="/assets/images/company_memory_used.png" alt="fig-6 Memory Usage of different services" class="align-center" />
+fig-6 Memory Usage of different services</p>
+
+<p>fig-6 shows the memory usage of different services during tests. As company demo is a simple use case, the memory usage remained quite stable during tests. Comparing to memory usage of the <em>bulletin board</em> service(written in go), other services written in Java take a great deal of memory.</p>
+
+<h2 id="conclusions">Conclusions</h2>
+
+<p>Stress test on applications can help us find out the potential problems in our services before our services run in production environment. It simulates the production environment and validates whether our services meet the specification requirements. We can tune our pod deployment settings based on the stress test result to system’s maximum throughput while keeping SLA.</p>
+
+<p>Applications based on microservice architecture become much more flexible not only on design, programming and tests, but also on deployment. Services based on microservice architecture make resources scale up and down extremely fast. We can choose different specifications of machine and different replicas for different services according to the maximum throughput to save resources. Besides, the scalability of cloud makes services handle visit storm easily.</p>
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+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/syncer/quick-start/" class="">Quick Start</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/docs/syncer/multi-servicecenters/" class="active">Different service centers communicate with each other</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Communication on differ-structure servicecenters">
+    <meta itemprop="description" content="Learn how to use differ-structure, multi-service center synchronization tool">
+    
+    <meta itemprop="dateModified" content="November 12, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Communication on differ-structure servicecenters
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#servicecenter-and-eureka" id="markdown-toc-servicecenter-and-eureka">ServiceCenter and Eureka</a>    <ul>
+      <li><a href="#operating-environment" id="markdown-toc-operating-environment">Operating environment</a></li>
+      <li><a href="#before-starting" id="markdown-toc-before-starting">Before starting：</a></li>
+      <li><a href="#step-1-launch-the-eureka-environment-and-services" id="markdown-toc-step-1-launch-the-eureka-environment-and-services">Step 1: Launch the Eureka environment and services</a></li>
+      <li><a href="#step-2-start-the-servicecenter-environment-and-services" id="markdown-toc-step-2-start-the-servicecenter-environment-and-services">Step 2: Start the Servicecenter environment and services</a></li>
+      <li><a href="#step-3-results-verification" id="markdown-toc-step-3-results-verification">Step 3: Results Verification</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="servicecenter-and-eureka">ServiceCenter and Eureka</h2>
+
+<p>Situation description：</p>
+<ul>
+  <li>EurekaServer： The Service-center of Eureka</li>
+  <li>AccountServer：The account server of register to Eureka</li>
+  <li>Servicecomb-ServiceCenter：Servicecomb-ServiceCenter</li>
+  <li>HelloServer：The server of  register to Servicecomb-ServiceCenter，that dependent on account server</li>
+</ul>
+
+<p>Instances cannot be discovered and accessed by each other between different service centers, in a traditional environment. This will be easy to implement when we use Syner. As shown below:  <br />
+<img src="/assets/images/docs/syncer/multi-servicecenters.png" alt="image" /></p>
+
+<h3 id="operating-environment">Operating environment</h3>
+<ol>
+  <li>2 linux machines: （Host IP is like this：10.0.0.10 和 10.0.0.11）</li>
+  <li><a href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">JDK 1.8</a></li>
+  <li><a href="https://maven.apache.org/install.html">Maven 3.x</a></li>
+  <li><a href="https://golang.google.cn/dl/">Go 1.11.4</a></li>
+</ol>
+
+<h3 id="before-starting">Before starting：</h3>
+<ol>
+  <li><a href="/docs/service-center/install/">Install ServiceCenter Release（&gt;=1.3.0）</a>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ project_dir</span><span class="o">=</span><span class="sb">`</span><span class="nb">pwd</span><span class="sb">`</span>
+<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span>  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
+</code></pre></div>    </div>
+  </li>
+  <li>Download <a href="https://github.com/apache/servicecomb-service-center/tree/master/syncer/samples/multi-servicecenters">the sample</a>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>git clone https://github.com/apache/servicecomb-service-center.git
+<span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h3 id="step-1-launch-the-eureka-environment-and-services">Step 1: Launch the Eureka environment and services</h3>
+<p>One of the machines： 10.0.0.10</p>
+<h4 id="1-compile-eurekaserver-and-accountserver">1. Compile EurekaServer and AccountServer</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd </span>samples/multi-servicecenters/eureka
+<span class="nv">$ </span>mvn clean <span class="nb">install</span>
+</code></pre></div></div>
+<h4 id="2-run-eurekaserver">2. Run EurekaServer：</h4>
+<ul>
+  <li>Modify the startup configuration
+ File path：${project_dir}/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/eureka-server/src/main/resources/application.yaml
+    <div class="language-yml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spring</span><span class="pi">:</span>
+<span class="na">application</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">eureka-server</span>
+<span class="na">server</span><span class="pi">:</span>
+<span class="na">port </span><span class="pi">:</span> <span class="m">8761</span>
+<span class="c1">#  servlet:</span>
+<span class="c1">#    context-path: /eureka</span>
+<span class="na">eureka</span><span class="pi">:</span>
+<span class="na">instance</span><span class="pi">:</span>
+  <span class="na">hostname </span><span class="pi">:</span> <span class="s">10.0.0.10</span>
+<span class="na">client</span><span class="pi">:</span>
+  <span class="na">registerWithEureka </span><span class="pi">:</span> <span class="no">false</span>
+  <span class="na">fetchRegistry </span><span class="pi">:</span> <span class="no">false</span>
+  <span class="na">serviceUrl</span><span class="pi">:</span>
+    <span class="na">defaultZone </span><span class="pi">:</span> <span class="s">http://${eureka.instance.hostname}:${server.port}/eureka/</span>
+<span class="na">management</span><span class="pi">:</span>
+<span class="na">endpoints</span><span class="pi">:</span>
+  <span class="na">web</span><span class="pi">:</span>
+    <span class="na">exposure</span><span class="pi">:</span>
+      <span class="na">include</span><span class="pi">:</span> <span class="s2">"</span><span class="s">*"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Run server
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/eureka-server/
+<span class="nv">$ </span><span class="nb">nohup </span>mvn spring-boot:run &amp; <span class="o">&gt;&gt;</span> eureka-server.log 2&gt;&amp;1 &amp;
+</code></pre></div>    </div>
+    <p>Open http://10.0.0.10:8761 in the browser, this is successful if the following page appears.<br />
+ <img src="/assets/images/docs/syncer/eureka-server-success.jpg" alt="image" /></p>
+  </li>
+</ul>
+
+<h4 id="3-run-accountserver">3. Run AccountServer</h4>
+<ul>
+  <li>Modify the startup configuration<br />
+ File path：${project_dir}/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/account-server/src/main/resources/application.yaml
+    <div class="language-yml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">spring</span><span class="pi">:</span>
+<span class="na">application</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">account-server</span>
+<span class="na">server</span><span class="pi">:</span>
+<span class="na">port</span><span class="pi">:</span> <span class="m">8090</span>
+<span class="na">eureka</span><span class="pi">:</span>
+<span class="na">instance</span><span class="pi">:</span>
+  <span class="na">hostname</span><span class="pi">:</span> <span class="s">10.0.0.10</span>
+<span class="na">client</span><span class="pi">:</span>
+  <span class="na">service-url</span><span class="pi">:</span>
+    <span class="na">defaultZone</span><span class="pi">:</span> <span class="s">http://${eureka.instance.hostname}:8761/eureka/</span>
+<span class="na">management</span><span class="pi">:</span>
+<span class="na">endpoints</span><span class="pi">:</span>
+  <span class="na">web</span><span class="pi">:</span>
+    <span class="na">exposure</span><span class="pi">:</span>
+      <span class="na">include</span><span class="pi">:</span> <span class="s2">"</span><span class="s">*"</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Start AccountServer
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/eureka/account-server
+<span class="nv">$ </span>mvn spring-boot:run
+<span class="c">#This is successful if the result like this，</span>
+2019-09-19 17:20:35.534  INFO 20890 <span class="nt">---</span> <span class="o">[</span>           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port<span class="o">(</span>s<span class="o">)</span>: 8090 <span class="o">(</span>http<span class="o">)</span> with context path <span class="s1">''</span>
+2019-09-19 17:20:35.548  INFO 20890 <span class="nt">---</span> <span class="o">[</span>           main] .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8090
+2019-09-19 17:20:35.551  INFO 20890 <span class="nt">---</span> <span class="o">[</span>           main] o.a.s.s.account.AccountApplication       : Started AccountApplication <span class="k">in </span>3.92 seconds <span class="o">(</span>JVM running <span class="k">for </span>6.754<span class="o">)</span>
+2019-09-19 17:20:35.617  INFO 20890 <span class="nt">---</span> <span class="o">[</span>nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_ACCOUNT-SERVER/10.0.0.10:account-server:8090 - registration status: 204
+</code></pre></div>    </div>
+    <p>Reopen http://10.0.0.10:8761, you can see that AccountServer has been registered successfully.<br />
+ <img src="/assets/images/docs/syncer/eureka-account-server-success.jpg" alt="image" /></p>
+  </li>
+</ul>
+
+<h4 id="4-run-syncer-of-eureka">4. Run Syncer of eureka</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/apache-servicecomb-service-center-1.3.0-linux-amd64/
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:8761/eureka <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191 <span class="nt">--sc-plugin</span><span class="o">=</span>eureka  <span class="nt">--node</span> eureka
+<span class="c">#This is successful if the result like this，</span>
+2019-09-19T17:28:28.809+0800	INFO	etcd/agent.go:55	start etcd success
+2019-09-19T17:28:28.809+0800	INFO	grpc/server.go:94	start grpc success
+2019-09-19T17:28:28.809+0800	DEBUG	server/handler.go:39	is leader: <span class="nb">true
+</span>2019-09-19T17:28:28.809+0800	DEBUG	server/handler.go:43	Handle Tick
+</code></pre></div></div>
+
+<h3 id="step-2-start-the-servicecenter-environment-and-services">Step 2: Start the Servicecenter environment and services</h3>
+<p>Another machine： 10.0.0.11</p>
+<h4 id="1-compile-helloserver">1. Compile HelloServer</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/servicecenter/hello-server/
+<span class="nv">$ GO111MODULE</span><span class="o">=</span>on go build
+</code></pre></div></div>
+<h4 id="2-run-servicecenter">2. Run Servicecenter</h4>
+<ul>
+  <li>Modify the startup configuration：<br />
+ File path：${project_dir}/apache-servicecomb-service-center-1.3.0-linux-amd64/conf/app.conf
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>frontend_host_ip <span class="o">=</span> 10.0.0.11
+frontend_host_port <span class="o">=</span> 30103
+<span class="c">#sever options</span>
+<span class="c">#if you want to listen at ipv6 address, then set the httpaddr value like:</span>
+<span class="c">#httpaddr = 2400:A480:AAAA:200::159        (global scope)</span>
+<span class="c">#httpaddr = fe80::f816:3eff:fe17:c38b%eth0 (link-local scope)</span>
+httpaddr <span class="o">=</span> 10.0.0.11
+httpport <span class="o">=</span> 30100
+<span class="c">#...以下省略...</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Run ServiceCenter and Frontend
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/apache-servicecomb-service-center-1.3.0-linux-amd64
+<span class="nv">$ </span>./start-service-center.sh
+<span class="nv">$ </span>./start-frontend.sh
+</code></pre></div>    </div>
+    <p>Open http://10.0.0.11:30103 in the browser, this is successful if the following page appears.  <br />
+ <img src="/assets/images/docs/syncer/service-center-server-success.jpg" alt="image" /></p>
+  </li>
+</ul>
+
+<h4 id="3-run-helloserver">3. Run HelloServer</h4>
+<ul>
+  <li>Modify the startup configuration<br />
+ File path：${project_dir}/servicecomb-service-center/syncer/samples/multi-servicecenters/servicecenter/hello-server/conf/microservice.yaml
+    <div class="language-yml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">service</span><span class="pi">:</span> <span class="c1"># Micro service configuration</span>
+<span class="na">appId</span><span class="pi">:</span> <span class="s">eureka</span> <span class="c1"># The appID is "eureka", if the instance synced from eureka.</span>
+<span class="na">name</span><span class="pi">:</span> <span class="s">hello-server</span>
+<span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">instance</span><span class="pi">:</span> <span class="c1"># Instance information</span>
+  <span class="na">protocol</span><span class="pi">:</span> <span class="s">rest</span>
+  <span class="na">listenAddress</span><span class="pi">:</span> <span class="s">10.0.0.11:8091</span> <span class="c1">#The listening address of the instance</span>
+<span class="na">provider</span><span class="pi">:</span> <span class="c1"># Provider information</span>
+<span class="na">appId</span><span class="pi">:</span> <span class="s">eureka</span>
+<span class="na">name</span><span class="pi">:</span> <span class="s">account-server</span>
+<span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+<span class="na">registry</span><span class="pi">:</span>
+<span class="na">address</span><span class="pi">:</span> <span class="s">http://10.0.0.11:30100</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Start HelloServer
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/servicecomb-service-center/syncer/samples/multi-servicecenters/servicecenter/hello-server
+<span class="nv">$ </span>./hello-server
+2019-09-19T18:37:50.645+0800	DEBUG	servicecenter/servicecenter.go:163	send heartbeat success
+2019-09-19T18:37:50.645+0800	WARN	servicecenter/servicecenter.go:85	discovery provider failed, appID <span class="o">=</span> eureka, name <span class="o">=</span> account-server, version <span class="o">=</span> 0.0.1
+2019-09-19T18:37:50.645+0800	INFO	servicecenter/servicecenter.go:87	waiting <span class="k">for </span>retry
+</code></pre></div>    </div>
+    <p>Reopen http://10.0.0.11:30103, you can see that HelloServer has been registered successfully.  <br />
+ <img src="/assets/images/docs/syncer/service-center-hello-server-success.jpg" alt="image" /><br />
+ But, the instance of AccountServer belonging to the EurekaServer cannot be found, the HelloServer is in the retry state. <br />
+ (<strong><em>Warning</em></strong>: We must complete the operation within 3 retry times (90 seconds))</p>
+  </li>
+</ul>
+
+<h4 id="4run-syncer-of-service-center">4.Run Syncer of service-center</h4>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span><span class="nb">cd</span> <span class="k">${</span><span class="nv">project_dir</span><span class="k">}</span>/apache-servicecomb-service-center-1.3.0-linux-amd64/
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--sc-plugin</span><span class="o">=</span>servicecenter <span class="nt">--join-addr</span> 10.0.0.10:30190 <span class="nt">--node</span> servicecenter
+<span class="c">#This is successful if the result like this，</span>
+2019-09-19T18:44:35.536+0800	DEBUG	server/handler.go:62	is leader: <span class="nb">true
+</span>2019-09-19T18:44:35.536+0800	DEBUG	server/handler.go:79	Receive serf user event
+2019-09-19T18:44:35.536+0800	DEBUG	serf/agent.go:130	member <span class="o">=</span> servicecenter, groupName <span class="o">=</span> 0204d59328090c2f4449a088d4e0f1d8
+2019-09-19T18:44:35.536+0800	DEBUG	serf/agent.go:130	member <span class="o">=</span> eureka, groupName <span class="o">=</span> 34f53a9520a11c01f02f58f733e856b3
+2019-09-19T18:44:35.536+0800	DEBUG	server/handler.go:97	Going to pull data from eureka 10.0.0.10:30191
+2019-09-19T18:44:35.536+0800	INFO	grpc/client.go:76	Create new grpc connection to 10.0.0.10:30191
+2019-09-19T18:44:35.538+0800	DEBUG	servicecenter/servicecenter.go:87	create service success <span class="nv">orgServiceID</span><span class="o">=</span> account-server, curServiceID <span class="o">=</span> 80784229255ec96d90353e3c041bdf3586fdbbae
+2019-09-19T18:44:35.538+0800	DEBUG	servicecenter/servicecenter.go:90	trying to <span class="k">do </span>registration of instance, instanceID <span class="o">=</span> 10.0.0.10:account-server:8090
+2019-09-19T18:44:35.540+0800	DEBUG	servicecenter/sync.go:63	Registered instance successful, instanceID <span class="o">=</span> 78bca3e2daca11e99638fa163eca30e0
+</code></pre></div></div>
+
+<h3 id="step-3-results-verification">Step 3: Results Verification</h3>
+<ol>
+  <li>
+    <p>At this point, HelloServer gets the instance successfully, and calls the CheckHealth interface of AccountServer.<br />
+<img src="/assets/images/docs/syncer/hello-server-discovery-success.jpg" alt="image" /></p>
+  </li>
+  <li>Open the website of Euraka and ServiceCenter respectively. Both service centers contain all the instance information.<br />
+<img src="/assets/images/docs/syncer/eureka-server-has-all.jpg" alt="image" /> <br />
+<img src="/assets/images/docs/syncer/service-center-server-has-all.jpg" alt="image" /></li>
+  <li>Call the Login interface of HelloServer used the command line of curl,
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>curl <span class="nt">-X</span> POST <span class="se">\</span>
+http://192.168.88.75:8091/login <span class="se">\</span>
+<span class="nt">-H</span> <span class="s1">'Content-Type: application/json'</span> <span class="se">\</span>
+<span class="nt">-d</span> <span class="s1">'{
+  "user":"Jack",
+  "password":"123456"
+}'</span>
+welcome Jack
+</code></pre></div>    </div>
+    <p>HelloServer and AccountServer respectively print the following information.  <br />
+AccountServer<br />
+<img src="/assets/images/docs/syncer/account-server-reply.jpg" alt="image" /> <br />
+HelloServer <br />
+<img src="/assets/images/docs/syncer/hello-server-result.jpg" alt="image" /></p>
+  </li>
+</ol>
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+
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+      
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+</h1>
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+  <li><a href="#differ-structure-multi-service-center-synchronization-tool" id="markdown-toc-differ-structure-multi-service-center-synchronization-tool">Differ-structure, multi-service center synchronization tool</a></li>
+  <li><a href="#quick-start" id="markdown-toc-quick-start">Quick Start</a></li>
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+
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+
+<h2 id="differ-structure-multi-service-center-synchronization-tool">Differ-structure, multi-service center synchronization tool</h2>
+<p>Syncer is a multiple servicecenters synchronization tool designed for large microservice architectures,supporting differ-structure servicecenters.</p>
+
+<h2 id="quick-start">Quick Start</h2>
+<p>1 Getting &amp; Running Service center</p>
+
+<p>Take Service-center as an example, reference to <a href="/docs/service-center/install/">Install ServiceCenter</a></p>
+
+<ol>
+  <li>Download and decompression <a href="/release/service-center-downloads/">ServiceCenter发布包（&gt;=1.3.0）</a>
+    <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># 解压tar包</span>
+<span class="nv">$ </span><span class="nb">tar</span> <span class="nt">-zxvf</span>  apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz
+<span class="nv">$ </span><span class="nb">cd </span>apache-servicecomb-service-center-1.3.0-linux-amd64/
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<h5 id="33-running-servicecenter-syncer">3.3 Running ServiceCenter Syncer</h5>
+<h6 id="parameter-description">Parameter Description</h6>
+<ul>
+  <li>
+    <p>node</p>
+
+    <p>The member name of syncer, that must be unique in the cluster</p>
+  </li>
+  <li>
+    <p>sc-addr</p>
+
+    <p>Service center address, which is the service registry address. Cluster mode is supported, and multiple addresses are separated by commas.</p>
+  </li>
+  <li>
+    <p>bind-addr</p>
+
+    <p>P2P address of Syncer for communication with other Syner members in P2P networks by Gossip.</p>
+  </li>
+  <li>
+    <p>rpc-addr</p>
+
+    <p>Address of Syncer for data transmission, used to synchronize microservices data  between Syncers.</p>
+  </li>
+  <li>
+    <p>join-addr</p>
+
+    <p>The bind-addr of target syncer, one of other syncer members, the current Syncer will join the network by this.</p>
+  </li>
+  <li>
+    <p>mode</p>
+
+    <p>Runtime mode of Syncer, specify ‘cluster’ for cluster mode which enables each Syncer to have three instance, default to ‘single’ mode.</p>
+  </li>
+  <li>
+    <p>cluster-name</p>
+
+    <p>Name of the Syncer cluster when mode is set to be ‘cluster’.</p>
+  </li>
+  <li>
+    <p>cluster-port</p>
+
+    <p>The port that the Syner cluster members communicate with when mode is set to be “cluster”.</p>
+  </li>
+</ul>
+
+<p>Suppose there are 2 Service centers, each of them with a Service-center cluster for microservices discovery and registry, as following,</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: center">Servicecenter</th>
+      <th style="text-align: center">Local address</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: center">http://10.0.0.10:30100</td>
+      <td style="text-align: center">10.0.0.10</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">http://10.0.0.11:30100</td>
+      <td style="text-align: center">10.0.0.11</td>
+    </tr>
+  </tbody>
+</table>
+
+<h4 id="single-mode">Single Mode</h4>
+
+<p>Start Service-center Syncer to enable communication between 2 service centers</p>
+
+<ul>
+  <li>Start Sycner  on host 10.0.0.10</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191
+</code></pre></div></div>
+
+<ul>
+  <li>Start Syncer on host 10.0.0.11 and join into 10.0.0.10 gossip pool</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--join-addr</span> 10.0.0.10:30191
+</code></pre></div></div>
+
+<h4 id="cluster-mode">Cluster Mode</h4>
+
+<p>Start 2 Syncer clusters on there host to synchronize microservice data between the 2 service centers</p>
+
+<ul>
+  <li>Start Syncer cluster on host 10.0.0.10</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30190 <span class="nt">--rpc-addr</span> 10.0.0.10:30191 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer011 <span class="nt">--cluster-port</span> 30201 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30290 <span class="nt">--rpc-addr</span> 10.0.0.10:30291 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer012 <span class="nt">--cluster-port</span> 30202 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.10:30100 <span class="nt">--bind-addr</span> 10.0.0.10:30390 <span class="nt">--rpc-addr</span> 10.0.0.10:30391 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer013 <span class="nt">--cluster-port</span> 30203 <span class="nt">--join-addr</span> 10.0.0.10:30190
+</code></pre></div></div>
+
+<ul>
+  <li>Start Syncer cluster on host 10.0.0.11</li>
+</ul>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30190 <span class="nt">--rpc-addr</span> 10.0.0.11:30191 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer021 <span class="nt">--cluster-port</span> 30201 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30290 <span class="nt">--rpc-addr</span> 10.0.0.11:30291 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer022 <span class="nt">--cluster-port</span> 30202 <span class="nt">--join-addr</span> 10.0.0.10:30190
+<span class="nv">$ </span>./syncer daemon <span class="nt">--sc-addr</span> http://10.0.0.11:30100 <span class="nt">--bind-addr</span> 10.0.0.11:30390 <span class="nt">--rpc-addr</span> 10.0.0.11:30391 <span class="nt">--mode</span> cluster <span class="nt">--node</span> syncer023 <span class="nt">--cluster-port</span> 30203 <span class="nt">--join-addr</span> 10.0.0.10:30190
+</code></pre></div></div>
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+      <li><a href="#tag-object-doc" id="markdown-toc-tag-object-doc">Tag Object doc</a></li>
+      <li><a href="#paths-object-doc" id="markdown-toc-paths-object-doc">Paths Object doc</a></li>
+      <li><a href="#path-item-object-doc" id="markdown-toc-path-item-object-doc">Path Item Object doc</a></li>
+      <li><a href="#operation-object-doc" id="markdown-toc-operation-object-doc">Operation Object doc</a></li>
+      <li><a href="#parameter-object-doc" id="markdown-toc-parameter-object-doc">Parameter Object doc</a></li>
+      <li><a href="#request-body-object-doc" id="markdown-toc-request-body-object-doc">Request Body Object doc</a></li>
+      <li><a href="#media-type-object-doc" id="markdown-toc-media-type-object-doc">Media Type Object doc</a></li>
+      <li><a href="#responses-object-doc" id="markdown-toc-responses-object-doc">Responses Object doc</a></li>
+      <li><a href="#response-object-doc" id="markdown-toc-response-object-doc">Response Object doc</a></li>
+      <li><a href="#schema-object-doc" id="markdown-toc-schema-object-doc">Schema Object doc</a></li>
+      <li><a href="#encoding-object-doc" id="markdown-toc-encoding-object-doc">Encoding Object doc</a></li>
+      <li><a href="#header-object-doc" id="markdown-toc-header-object-doc">Header Object doc</a></li>
+      <li><a href="#components-object-doc" id="markdown-toc-components-object-doc">Components Object doc</a></li>
+    </ul>
+  </li>
+  <li><a href="#compatibility-check-rules" id="markdown-toc-compatibility-check-rules">Compatibility check rules</a>    <ul>
+      <li><a href="#paths-object-doc-1" id="markdown-toc-paths-object-doc-1">Paths Object doc</a></li>
+      <li><a href="#path-item-object-doc-1" id="markdown-toc-path-item-object-doc-1">Path Item Object doc</a></li>
+      <li><a href="#operation-object-doc-1" id="markdown-toc-operation-object-doc-1">Operation Object doc</a></li>
+      <li><a href="#parameter-object-doc-1" id="markdown-toc-parameter-object-doc-1">Parameter Object doc</a></li>
+      <li><a href="#request-body-object-doc-1" id="markdown-toc-request-body-object-doc-1">Request Body Object doc</a></li>
+      <li><a href="#media-type-object-doc-1" id="markdown-toc-media-type-object-doc-1">Media Type Object doc</a></li>
+      <li><a href="#responses-object-doc-1" id="markdown-toc-responses-object-doc-1">Responses Object doc</a></li>
+      <li><a href="#response-object-doc-1" id="markdown-toc-response-object-doc-1">Response Object doc</a></li>
+      <li><a href="#schema-object-doc-1" id="markdown-toc-schema-object-doc-1">Schema Object doc</a></li>
+      <li><a href="#in-request-context" id="markdown-toc-in-request-context">In request context</a></li>
+      <li><a href="#in-response-context" id="markdown-toc-in-response-context">In response context</a></li>
+      <li><a href="#encoding-object-doc-1" id="markdown-toc-encoding-object-doc-1">Encoding Object doc</a></li>
+      <li><a href="#header-object-doc-1" id="markdown-toc-header-object-doc-1">Header Object doc</a></li>
+      <li><a href="#components-object-doc-1" id="markdown-toc-components-object-doc-1">Components Object doc</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="project-structure">Project structure</h2>
+
+<ul>
+  <li>oas-validator-core: core apis and skeletons implementations</li>
+  <li>oas-validator-core-spring: Spring Boot Starter for core skeletons</li>
+  <li>oas-validator-test: test helpers for core api</li>
+  <li>oas-validator-compliance: check style validators</li>
+  <li>oas-validator-compliance-spring: Spring Boot Starter for check style validators</li>
+  <li>oas-validator-compatibility: compatibility validators</li>
+  <li>oas-validator-compatibility-spring: Spring Boot Starter for compatibility validators</li>
+  <li>oas-validator-web: web ui</li>
+</ul>
+
+<h2 id="style-check-rules">Style check rules</h2>
+
+<p>OAS must compatible with <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md">OAS 3.0.2</a>, besides must obey the following rules.</p>
+
+<h3 id="string-patterns">String patterns</h3>
+
+<ul>
+  <li><a name="lower-camel-case"></a> Lower Camel Case: initial letter lowercase camel case, regex is <code class="highlighter-rouge">^[a-z]+((\d)|([A-Z0-9][a-z0-9]+))*([A-Z])?$</code></li>
+  <li><a name="upper-camel-case"></a> Upper Camel Case: initial letter uppercase camel case, regex is <code class="highlighter-rouge">^[A-Z]([a-z0-9]+[A-Z]?)*$</code></li>
+  <li><a name="upper-hyphen-case"></a> Upper Hyphen Case: initial letter uppercase, multiple words concat with <code class="highlighter-rouge">-</code>, such as <code class="highlighter-rouge">Content-Type</code>, <code class="highlighter-rouge">Accept</code>, <code class="highlighter-rouge">X-Rate-Limit-Limit</code>, regex is <code class="highlighter-rouge">^([A-Z][a-z0-9]*-)*([A-Z][a-z0-9]*)$</code></li>
+</ul>
+
+<h3 id="openapi-object-doc">OpenAPI Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#openapi-object">doc</a></h3>
+
+<p><a name="openapi-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">openapi</code> property must be 3.0.x and &gt;= 3.0.2</li>
+  <li><code class="highlighter-rouge">info</code> propety, see <a href="#info-compliance">Info Object style check rules</a></li>
+  <li><code class="highlighter-rouge">paths</code> property, must provide, see  <a href="#paths-compliance">Paths Object style check rules</a></li>
+  <li><code class="highlighter-rouge">components</code> property, see <a href="#components-compliance">Components Object style check rules</a></li>
+  <li><code class="highlighter-rouge">tags</code> property should at least provide one <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#tagObject">Tag Object</a>
+    <ul>
+      <li>see  <a href="#tag-compliance">Tag Object style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">security</code> property, should not provide</li>
+</ul>
+
+<h3 id="info-object-doc">Info Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#infoObject">doc</a></h3>
+
+<p><a name="info-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code> property, required</li>
+</ul>
+
+<h3 id="tag-object-doc">Tag Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#tagObject">doc</a></h3>
+
+<p><a name="tag-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">name</code> property, must be <a href="#upper-camel-case">Upper Camel Case</a></li>
+  <li><code class="highlighter-rouge">description</code> property, required</li>
+  <li>Every tag should be referenced by at least one <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">Operation Object</a></li>
+</ul>
+
+<h3 id="paths-object-doc">Paths Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#paths-object">doc</a></h3>
+
+<p><a name="paths-compliance"></a></p>
+
+<ul>
+  <li>path must be <a href="#lower-camel-case">Lower Camel Case</a>, including <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#path-templating">Path Templating</a> variable
+    <ul>
+      <li>see  <a href="#path-item-compliance">Path Item Object style check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="path-item-object-doc">Path Item Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#pathItemObject">doc</a></h3>
+
+<p><a name="path-item-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">get/post/put/delete/...</code> properties, see  <a href="operation-compliance">Operation Object style check rules</a></li>
+  <li><code class="highlighter-rouge">parameters</code> property, see  <a href="#parameter-compliance">Parameter Object style check rules</a></li>
+</ul>
+
+<h3 id="operation-object-doc">Operation Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">doc</a></h3>
+
+<p><a name="operation-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">summary</code> property, required</li>
+  <li><code class="highlighter-rouge">operationId</code> property, must be <a href="#lower-camel-case">Lower Camel Case</a></li>
+  <li><code class="highlighter-rouge">parameters</code> property, see  <a href="#parameter-compliance">Parameter Object style check rules</a></li>
+  <li><code class="highlighter-rouge">requestBody</code> property, see  <a href="#request-body-compliance">Request Body Object style check rules</a></li>
+  <li><code class="highlighter-rouge">responses</code> property, see  <a href="#responses-compliance">Responses Object style check rules</a></li>
+  <li><code class="highlighter-rouge">tags</code> property, can only provide one tag, must be in the range of <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#openapi-object">OpenAPI Object</a>   <code class="highlighter-rouge">tags</code> property</li>
+  <li><code class="highlighter-rouge">servers</code> property, should not provide</li>
+</ul>
+
+<h3 id="parameter-object-doc">Parameter Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">doc</a></h3>
+
+<p><a name="parameter-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code> property, required</li>
+  <li><code class="highlighter-rouge">name</code> property
+    <ul>
+      <li>if <code class="highlighter-rouge">in</code> is path, query or cookie, then must be <a href="#lower-camel-case">Lower Camel Case</a></li>
+      <li>if <code class="highlighter-rouge">in</code> is header, then must be <a href="#upper-hyphen-case">Upper Hyphen Case</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">schema</code> property, see  <a href="#schema-compliance">Schema Object check sytle rules</a></li>
+  <li><code class="highlighter-rouge">content</code> property, see  <a href="#media-type-compliance">Media Type Object style check rules</a></li>
+</ul>
+
+<h3 id="request-body-object-doc">Request Body Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject">doc</a></h3>
+
+<p><a name="request-body-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code> property, required</li>
+  <li><code class="highlighter-rouge">content</code> property, see  <a href="#media-type-compliance">Media Type Object style check rules</a></li>
+</ul>
+
+<h3 id="media-type-object-doc">Media Type Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object">doc</a></h3>
+
+<p><a name="media-type-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schema</code> property, required. See  <a href="#schema-compliance">Schema Object style check rules</a></li>
+  <li><code class="highlighter-rouge">encoding</code> property, see  <a href="#encoding-compliance">Encoding Object style check rules</a></li>
+</ul>
+
+<h3 id="responses-object-doc">Responses Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject">doc</a></h3>
+
+<p><a name="responses-compliance"></a></p>
+
+<ul>
+  <li>See <a href="#response-compliance">Response Object style check rules</a></li>
+</ul>
+
+<h3 id="response-object-doc">Response Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object">doc</a></h3>
+
+<p><a name="response-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code> property, required</li>
+  <li><code class="highlighter-rouge">headers</code> property, name (<code class="highlighter-rouge">headers</code> key) must be <a href="#upper-hyphen-case">Upper Hyphen Case</a>
+    <ul>
+      <li>See <a href="#header-compliance">Header Object style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">content</code> property, see <a href="#media-type-compliance">Media Type Object style check rules</a></li>
+</ul>
+
+<h3 id="schema-object-doc">Schema Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject">doc</a></h3>
+
+<p><a name="schema-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">title</code> property, required if parent is <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject">Schema Object</a> or <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">Components Object</a></li>
+  <li><code class="highlighter-rouge">properties</code> property, name(<code class="highlighter-rouge">properties</code> key) must be <a href="#lower-camel-case">Lower Camel Case</a>
+    <ul>
+      <li>Sub Schema, see <a href="#schema-compliance">Schema Object style check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="encoding-object-doc">Encoding Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#encodingObject">doc</a></h3>
+
+<p><a name="encoding-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">headers</code> property, name(<code class="highlighter-rouge">headers</code> key) must be <a href="#upper-hyphen-case">Upper Hyphen Case</a>
+    <ul>
+      <li>See <a href="#header-compliance">Header Object style check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="header-object-doc">Header Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">doc</a></h3>
+
+<p><a name="header-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">description</code> property, required</li>
+  <li><code class="highlighter-rouge">schema</code> property, see <a href="#schema-compliance">Schema Object style check rules</a></li>
+  <li><code class="highlighter-rouge">content</code> property, see <a href="#media-type-compliance">Media Type Object style check rules</a></li>
+</ul>
+
+<h3 id="components-object-doc">Components Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">doc</a></h3>
+
+<p><a name="components-compliance"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schemas</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>See <a href="#schema-compliance">Schema Object style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">responses</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>See <a href="#response-compliance">Response Object style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">parameters</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>See <a href="#parameter-compliance">Parameter Object style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">examples</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a></li>
+  <li><code class="highlighter-rouge">requestBodies</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a>
+    <ul>
+      <li>See <a href="#request-body-compliance">Request Body style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">headers</code> property, name must be <a href="#upper-hyphen-case">Upper Hyphen Case</a>
+    <ul>
+      <li>See <a href="#header-compliance">Header style check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">links</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a></li>
+  <li><code class="highlighter-rouge">callbacks</code> property, name must be <a href="#upper-camel-case">Upper Camel Case</a></li>
+</ul>
+
+<h2 id="compatibility-check-rules">Compatibility check rules</h2>
+
+<p>Check whether new OAS spec compatibile with old spec.</p>
+
+<p>Notice: OAS could use <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object">Reference Object</a>, two  OAS which are different in text maybe semantically same. For example, below old OAS doesn’t use <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object">Reference Object</a> while the new one uses:</p>
+
+<p>Old OAS</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">openapi</span><span class="pi">:</span> <span class="s2">"</span><span class="s">3.0.0"</span>
+<span class="na">info</span><span class="pi">:</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">1.0.0</span>
+  <span class="na">title</span><span class="pi">:</span> <span class="s">Swagger Petstore</span>
+  <span class="na">license</span><span class="pi">:</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">MIT</span>
+<span class="na">servers</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="na">url</span><span class="pi">:</span> <span class="s">http://petstore.swagger.io/v1</span>
+<span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/pets</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">summary</span><span class="pi">:</span> <span class="s">List all pets</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">listPets</span>
+      <span class="na">requestBody</span><span class="pi">:</span>
+        <span class="na">content</span><span class="pi">:</span>
+          <span class="s">application/json</span><span class="pi">:</span>
+            <span class="na">schema</span><span class="pi">:</span>
+              <span class="na">type</span><span class="pi">:</span> <span class="s">array</span>
+              <span class="na">items</span><span class="pi">:</span>
+                <span class="na">type</span><span class="pi">:</span> <span class="s">object</span>
+                <span class="na">properties</span><span class="pi">:</span>
+                  <span class="na">Foo</span><span class="pi">:</span>
+                    <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="s1">'</span><span class="s">200'</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">A paged array of pets</span>
+</code></pre></div></div>
+
+<p>New OAS</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/pets</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">listPets</span>
+      <span class="na">requestBody</span><span class="pi">:</span>
+        <span class="na">content</span><span class="pi">:</span>
+          <span class="s">application/json</span><span class="pi">:</span> 
+            <span class="na">schema</span><span class="pi">:</span>
+              <span class="s">$ref</span><span class="pi">:</span> <span class="s1">'</span><span class="s">#/components/schemas/Foo'</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="s1">'</span><span class="s">200'</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">A paged array of pets</span>
+<span class="na">components</span><span class="pi">:</span>
+  <span class="na">schemas</span><span class="pi">:</span>
+    <span class="na">Foo</span><span class="pi">:</span>
+      <span class="na">type</span><span class="pi">:</span> <span class="s">array</span>
+      <span class="na">items</span><span class="pi">:</span>
+        <span class="na">type</span><span class="pi">:</span> <span class="s">object</span>
+        <span class="na">properties</span><span class="pi">:</span>
+          <span class="na">Foo</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+</code></pre></div></div>
+
+<p>So, when do compatibility check we resolve <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object">Reference Object</a> in old and new OAS first, then do the check, below is the code snippet using <a href="https://github.com/swagger-api/swagger-parser">swagger-parser</a>:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">OpenAPIV3Parser</span> <span class="n">parser</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">OpenAPIV3Parser</span><span class="o">();</span>
+
+<span class="nc">ParseOptions</span> <span class="n">parseOptions</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">ParseOptions</span><span class="o">();</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setResolve</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setResolveCombinators</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setResolveFully</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
+<span class="n">parseOptions</span><span class="o">.</span><span class="na">setFlatten</span><span class="o">(</span><span class="kc">false</span><span class="o">);</span>
+
+<span class="nc">SwaggerParseResult</span> <span class="n">parseResult</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="na">readContents</span><span class="o">(</span><span class="n">content</span><span class="o">,</span> <span class="kc">null</span><span class="o">,</span> <span class="n">parseOptions</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p>So if  compatibility violations be found, the reported location will be different from the location in origin OAS spec.</p>
+
+<h3 id="paths-object-doc-1">Paths Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#paths-object">doc</a></h3>
+
+<p><a name="paths-compatibility"></a></p>
+
+<ul>
+  <li>New OAS must include all the <code class="highlighter-rouge">path</code> appears in 旧OAS. If <code class="highlighter-rouge">path</code> uses <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#path-templating">Path Templating</a>, even the variable name changed, will be considered semantically different. For example <code class="highlighter-rouge">/pets/{foo}</code> and <code class="highlighter-rouge">/pets/{bar}</code> are different.
+    <ul>
+      <li>See <a href="#path-item-compatibility">Path Item Object compatibility check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="path-item-object-doc-1">Path Item Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#pathItemObject">doc</a></h3>
+
+<p><a name="path-item-compatibility"></a></p>
+
+<ul>
+  <li>New OAS must inclued all old OAS get/put/post/delete/…<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">Operation Object</a></li>
+</ul>
+
+<h3 id="operation-object-doc-1">Operation Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">doc</a></h3>
+
+<p><a name="operation-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">operationId</code> property,  new and old must be identical</li>
+  <li><code class="highlighter-rouge">parameters</code> property, check work must also consider <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#user-content-pathitemparameters">Path Item Object parameters property</a>:
+    <ul>
+      <li>New OAS could add new <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>, but the new <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a> <code class="highlighter-rouge">required</code> property must be <code class="highlighter-rouge">false</code></li>
+      <li>New OAS could delete<a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a></li>
+      <li>The check on <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a> see <a href="#parameter-compatibility">Parameter Object compatibility check rules</a>(Under the same <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#operationObject">Operation Object</a> <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a> is identified by <code class="highlighter-rouge">name</code> and <code class="highlighter-rouge">in</code> property)。</li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">requestBody</code> property, see <a href="#request-body-compatibility">Request Body Object compatibility check rules</a></li>
+  <li><code class="highlighter-rouge">responses</code> property, see<a href="#responses-compatibility">Responses Object compatibility check rules</a></li>
+</ul>
+
+<h3 id="parameter-object-doc-1">Parameter Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">doc</a></h3>
+
+<p><a name="parameter-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">required</code> property, only allow <code class="highlighter-rouge">true(old) -&gt; false(new)</code> change</li>
+  <li><code class="highlighter-rouge">allowEmptyValue</code> property, only allow <code class="highlighter-rouge">false(old) -&gt; true(new)</code> change</li>
+  <li><code class="highlighter-rouge">style</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">explode</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">allowReserved</code> property, only allow <code class="highlighter-rouge">false(old) -&gt; true(new)</code> change</li>
+  <li><code class="highlighter-rouge">schema</code> property, see <a href="#schema-compatibility">Schema Object compatibility check rules</a></li>
+  <li><code class="highlighter-rouge">content</code>property, new OAS must include all old OAS media type (<code class="highlighter-rouge">content</code> keys), and add new media type is not allowed
+    <ul>
+      <li>see <a href="#media-type-compatibility">Media Type Object compatibility check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="request-body-object-doc-1">Request Body Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject">doc</a></h3>
+
+<p><a name="request-body-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">content</code>property, new OAS must include all old OAS media type (<code class="highlighter-rouge">content</code> keys)
+    <ul>
+      <li>See <a href="#media-type-compatibility">Media Type Object compatibility check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">required</code> property, only allow <code class="highlighter-rouge">true(old) -&gt; false(new)</code> change</li>
+</ul>
+
+<h3 id="media-type-object-doc-1">Media Type Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object">doc</a></h3>
+
+<p><a name="media-type-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schema</code> property, see <a href="#schema-compatibility">Schema Object compatibility check rules</a></li>
+  <li><code class="highlighter-rouge">encoding</code> property, this property only apply to <code class="highlighter-rouge">requestBody</code>, so new OAS and old OAS property name(<code class="highlighter-rouge">encoding</code> key) must be identical
+    <ul>
+      <li>See <a href="#encoding-compatibility">Encoding Object compatibility check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="responses-object-doc-1">Responses Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responsesObject">doc</a></h3>
+
+<p><a name="responses-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">default</code> property, if old OAS doesn’t define <code class="highlighter-rouge">default</code>, then new OAS should not define <code class="highlighter-rouge">default</code> too.</li>
+  <li><code class="highlighter-rouge">{Http Status Code}</code> property, new OAS is not allowed to add one.</li>
+  <li>See <a href="#response-compatibility">Response Object compatibility check rules</a></li>
+</ul>
+
+<h3 id="response-object-doc-1">Response Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object">doc</a></h3>
+
+<p><a name="response-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">headers</code> property, new OAS must include all old OAS header name(<code class="highlighter-rouge">headers</code> keys), and add new header name is allowed
+    <ul>
+      <li><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a> see <a href="#header-compatibility">Header Object compatibility check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">content</code> property, new OAS must include all old OAS media type(<code class="highlighter-rouge">content</code> keys), and add new media type is allowed
+    <ul>
+      <li><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#media-type-object">Media Type Object</a> see <a href="#media-type-compatibility">Media Type Object compatibility check rules</a></li>
+    </ul>
+  </li>
+</ul>
+
+<h3 id="schema-object-doc-1">Schema Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schemaObject">doc</a></h3>
+
+<p><a name="schema-compatibility"></a></p>
+
+<p>OAS allows Schema Object be directly or indirectly in:</p>
+
+<ul>
+  <li>Request: <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameterObject">Parameter Object</a>, <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#requestBodyObject">Request Body Object</a>, <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a></li>
+  <li>Response: <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a>, <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#response-object">Response Object</a></li>
+</ul>
+
+<p>In different context compatibility check rules are different.</p>
+
+<h3 id="in-request-context">In request context</h3>
+
+<p>When Schema Object is in response context, only allow change from more specific form to less specific form.</p>
+
+<ul>
+  <li><code class="highlighter-rouge">type, format</code> combination allowed change:</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>Old (type,format)</th>
+      <th>New (type,format)</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>integer, null</td>
+      <td>integer, int64<br />number, double<br />number, null</td>
+    </tr>
+    <tr>
+      <td>integer, int32</td>
+      <td>integer, int64<br />integer, null<br />number, float<br />number, double<br />number, null</td>
+    </tr>
+    <tr>
+      <td>integer, int64</td>
+      <td>integer, null<br />number, double<br />number, null</td>
+    </tr>
+    <tr>
+      <td>number, null</td>
+      <td>number, double</td>
+    </tr>
+    <tr>
+      <td>number, float</td>
+      <td>number, null<br />number, double</td>
+    </tr>
+    <tr>
+      <td>number, double</td>
+      <td>number, null</td>
+    </tr>
+    <tr>
+      <td>string, null</td>
+      <td>string, password</td>
+    </tr>
+    <tr>
+      <td>string, password</td>
+      <td>string, null</td>
+    </tr>
+  </tbody>
+</table>
+
+<ul>
+  <li><code class="highlighter-rouge">allOf</code>, <code class="highlighter-rouge">oneOf</code>, <code class="highlighter-rouge">anyOf</code> property, combine them first then do check</li>
+  <li><code class="highlighter-rouge">multipleOf</code> property, if old OAS is null, then new OAS must == old OAS or new OAS is a factor of old OAS, eg, 6(old)-&gt;3(new)</li>
+  <li><code class="highlighter-rouge">maximum</code>, <code class="highlighter-rouge">maxLength</code>, <code class="highlighter-rouge">maxItems</code>, <code class="highlighter-rouge">maxProperties</code>, if old OAS is null, then new OAS must be null too. Otherwise, new OAS must be &gt;= old OAS</li>
+  <li><code class="highlighter-rouge">minimum</code>, <code class="highlighter-rouge">minLenght</code>, <code class="highlighter-rouge">minItems</code>, <code class="highlighter-rouge">minProperties</code>, if old OAS is null, then new OAS must be null too. Otherwise, new OAS must be &lt;= old OAS.</li>
+  <li><code class="highlighter-rouge">exclusiveMaximum</code>, <code class="highlighter-rouge">exclusiveMinimum</code> property, only allow change <code class="highlighter-rouge">true(old)-&gt;false(new)</code></li>
+  <li><code class="highlighter-rouge">uniqueItems</code> property, only allow change <code class="highlighter-rouge">true(old)-&gt;false(new)</code></li>
+  <li><code class="highlighter-rouge">required</code> property, new OAS must == old OAS or new OAS is old OAS subset</li>
+  <li><code class="highlighter-rouge">enum</code> property, new OAS must == old OAS or new OAS is old OAS superset</li>
+  <li><code class="highlighter-rouge">properties</code> property, new OAS could add or delete property name(<code class="highlighter-rouge">properties</code> key)</li>
+  <li><code class="highlighter-rouge">nullable</code> property, only allow change <code class="highlighter-rouge">false(old)-&gt;true(new)</code></li>
+  <li><code class="highlighter-rouge">discriminator</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">xml</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">readOnly</code>, <code class="highlighter-rouge">writeOnly</code> property, new and old must be identical</li>
+</ul>
+
+<h3 id="in-response-context">In response context</h3>
+
+<p>When Schema Object is in response context, only allow change from less specific form to more specific form.</p>
+
+<ul>
+  <li><code class="highlighter-rouge">type, format</code> combination allowed change:</li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th>Old (type,format)</th>
+      <th>New (type,format)</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>integer, null</td>
+      <td>integer, int64<br />integer, int32</td>
+    </tr>
+    <tr>
+      <td>integer, int64</td>
+      <td>integer, null<br />interger, int32</td>
+    </tr>
+    <tr>
+      <td>number, null</td>
+      <td>number, double<br />number, float</td>
+    </tr>
+    <tr>
+      <td>number, double</td>
+      <td>number, null<br />number, float</td>
+    </tr>
+    <tr>
+      <td>string, null</td>
+      <td>string, password</td>
+    </tr>
+    <tr>
+      <td>string, password</td>
+      <td>string, null</td>
+    </tr>
+  </tbody>
+</table>
+
+<ul>
+  <li><code class="highlighter-rouge">allOf</code>, <code class="highlighter-rouge">oneOf</code>, <code class="highlighter-rouge">anyOf</code> property, combine them first then do check</li>
+  <li><code class="highlighter-rouge">multipleOf</code> property if old OAS is null. new OAS must == old OAS or new OAS must be a multiple of old OAS, eg, 3(old)-&gt;6(new)</li>
+  <li><code class="highlighter-rouge">maximum</code>, <code class="highlighter-rouge">maxLength</code>, <code class="highlighter-rouge">maxItems</code>, <code class="highlighter-rouge">maxProperties</code>, if old OAS is null, then new OAS must be null too. Otherwise, new OAS must &lt;= old OAS</li>
+  <li><code class="highlighter-rouge">minimum</code>, <code class="highlighter-rouge">minLenght</code>, <code class="highlighter-rouge">minItems</code>, <code class="highlighter-rouge">minProperties</code>, if old OAS is null, then new OAS must be null too. Otherwise, new OAS must &gt;= old OAS</li>
+  <li><code class="highlighter-rouge">exclusiveMaximum</code>, <code class="highlighter-rouge">exclusiveMinimum</code> property, only allow change  <code class="highlighter-rouge">false(old)-&gt;true(new)</code></li>
+  <li><code class="highlighter-rouge">uniqueItems</code> property, only allow change <code class="highlighter-rouge">false(old)-&gt;true(new)</code></li>
+  <li><code class="highlighter-rouge">required</code> new OAS must == old OAS or new OAS is old OAS superset</li>
+  <li><code class="highlighter-rouge">enum</code> property, new OAS must == old OAS or new OAS is old OAS subset</li>
+  <li><code class="highlighter-rouge">properties</code> property, new OAS could add or delete property name(<code class="highlighter-rouge">properties</code> key)</li>
+  <li><code class="highlighter-rouge">nullable</code> property , only allow change <code class="highlighter-rouge">true(old)-&gt;false(new)</code></li>
+  <li><code class="highlighter-rouge">discriminator</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">xml</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">readOnly</code>, <code class="highlighter-rouge">writeOnly</code> property, new and old must be identical</li>
+</ul>
+
+<h3 id="encoding-object-doc-1">Encoding Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#encodingObject">doc</a></h3>
+
+<p><a name="encoding-compatibility"></a></p>
+
+<p>Notice: Encoding Object only apply to Request Body Object</p>
+
+<ul>
+  <li><code class="highlighter-rouge">contentType</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">headers</code> property, new OAS can not add new he header name (<code class="highlighter-rouge">headers</code> key), but and delete header name
+    <ul>
+      <li><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">Header Object</a> see <a href="#header-compatibility">Header Object compatibility check rules</a></li>
+    </ul>
+  </li>
+  <li><code class="highlighter-rouge">style</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">explode</code> property, new and old must be identical</li>
+  <li><code class="highlighter-rouge">allowReserved</code> property, only allow change <code class="highlighter-rouge">false(old) -&gt; true(new)</code></li>
+</ul>
+
+<h3 id="header-object-doc-1">Header Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#header-object">doc</a></h3>
+
+<p><a name="header-compatibility"></a></p>
+
+<ul>
+  <li><code class="highlighter-rouge">schema</code> property, see <a href="#schema-compatibility">Schema Object compatibility check rules</a></li>
+</ul>
+
+<h3 id="components-object-doc-1">Components Object <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">doc</a></h3>
+
+<p><a name="components-compatibility"></a></p>
+
+<p><a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">Components Object</a> defines reusable OAS Object, but when doing compatibility check all <code class="highlighter-rouge">$ref</code> are resolved, so no need to check <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#components-object">Components Object</a> compatibility.</p>
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+    
+      <li>
+        
+          <span class="nav__sub-title">A contract-based microservice development toolkit</span>
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+
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#apache-servicecomb-toolkit" id="markdown-toc-apache-servicecomb-toolkit">Apache ServiceComb Toolkit</a></li>
+  <li><a href="#quick-start" id="markdown-toc-quick-start">Quick Start</a>    <ul>
+      <li><a href="#1-build-tool-and-plugins-from-source" id="markdown-toc-1-build-tool-and-plugins-from-source">1 Build tool and plugins from source</a></li>
+      <li><a href="#2-use-the-toolkit-maven-plugin-plugin" id="markdown-toc-2-use-the-toolkit-maven-plugin-plugin">2 Use the toolkit-maven-plugin plugin</a></li>
+      <li><a href="#3-use-the-toolkit-cli" id="markdown-toc-3-use-the-toolkit-cli">3 Use the toolkit cli</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="apache-servicecomb-toolkit">Apache ServiceComb Toolkit</h2>
+<p>Apache ServiceComb Toolkit is a contract-based microservice development toolkit. Provides the ability to convert and verify contracts, code, and documents, helping users quickly build microservice projects based on popular microservices frameworks and popular programming models, reducing the cost of microservices entry, enabling users to focus on business development, enhance refactoring and development efficiency.</p>
+
+<h2 id="quick-start">Quick Start</h2>
+<h3 id="1-build-tool-and-plugins-from-source">1 Build tool and plugins from source</h3>
+
+<blockquote>
+  <p>Build environment requirements</p>
+  <ul>
+    <li><a href="http://java.oracle.com">Java 8</a></li>
+    <li><a href="http://maven.apache.org/">Apache maven 3.5.0 or greater</a></li>
+  </ul>
+</blockquote>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># Get the latest source code for toolkit from github</span>
+<span class="nv">$ </span>git clone https://github.com/apache/servicecomb-toolkit.git
+<span class="nv">$ </span><span class="nb">cd </span>toolkit
+
+<span class="c"># Build package</span>
+<span class="nv">$ </span>mvn clean <span class="nb">install</span>
+</code></pre></div></div>
+
+<h3 id="2-use-the-toolkit-maven-plugin-plugin">2 Use the toolkit-maven-plugin plugin</h3>
+<h4 id="21-configuration">2.1 configuration</h4>
+<p>Configured in the pom file of the maven project</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- Set to 'code' to resolve the current project. Set to 'contract' to resolve the contract file for the specified path.If not set, the default is 'code' --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>code<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- The type of the contract file is generated. If it is not set, the default is 'yaml' --&gt;</span>
+        <span class="nt">&lt;contractFileType&gt;</span>yaml<span class="nt">&lt;/contractFileType&gt;</span>
+        <span class="c">&lt;!-- The type of the generated document. If not set, the default is 'html' --&gt;</span>
+        <span class="nt">&lt;documentType&gt;</span>html<span class="nt">&lt;/documentType&gt;</span>
+        <span class="c">&lt;!-- The root directory to save microservice project,contract file and document. If it is not set, the default is the 'target' under the directory where the command is run --&gt;</span>
+        <span class="nt">&lt;outputDirectory&gt;</span>./target<span class="nt">&lt;/outputDirectory&gt;</span>
+        <span class="c">&lt;!-- Input contract file path. Valid when sourceType is set to 'contract', must be set --&gt;</span>
+        <span class="nt">&lt;contractLocation&gt;</span>./contract<span class="nt">&lt;/contractLocation&gt;</span>
+        <span class="c">&lt;!-- Checked contract file path. Valid when sourceType is set to 'contract', must be set --&gt;</span>
+        <span class="nt">&lt;sourceContractPath&gt;</span>./target/contract<span class="nt">&lt;/sourceContractPath&gt;</span>
+        <span class="c">&lt;!-- Sample contract file path, must be set --&gt;</span>
+        <span class="nt">&lt;destinationContractPath&gt;</span>./contract<span class="nt">&lt;/destinationContractPath&gt;</span>
+        <span class="c">&lt;!-- Generated microservice project configuration --&gt;</span>
+        <span class="nt">&lt;service&gt;</span>
+            <span class="c">&lt;!-- Microservice type,can generated 'provider/consumer/all',the default is 'all' --&gt;</span>
+            <span class="nt">&lt;serviceType&gt;</span>all<span class="nt">&lt;/serviceType&gt;</span>
+            <span class="c">&lt;!-- Microservice project 'groupid',optional,the default is 'domain.orgnization.project' --&gt;</span>
+            <span class="nt">&lt;groupId&gt;</span>domain.orgnization.project<span class="nt">&lt;/groupId&gt;</span>
+            <span class="c">&lt;!-- Microservice project 'artifactId',optional,the default is 'sample' --&gt;</span>
+            <span class="nt">&lt;artifactId&gt;</span>sample<span class="nt">&lt;/artifactId&gt;</span>
+            <span class="c">&lt;!-- Microservice project 'artifactVersion',optional,the default is '0.1.0-SNAPSHOT' --&gt;</span>
+            <span class="nt">&lt;artifactVersion&gt;</span>0.1.0-SNAPSHOT<span class="nt">&lt;/artifactVersion&gt;</span>
+            <span class="c">&lt;!-- Microservice project 'packageName',optional,the default is 'domain.orgnization.project.sample' --&gt;</span>
+            <span class="nt">&lt;packageName&gt;</span>domain.orgnization.project.sample<span class="nt">&lt;/packageName&gt;</span>
+        <span class="nt">&lt;/service&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<h4 id="22-command">2.2 Command</h4>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c"># Generating contract, document and microservice project</span>
+mvn toolkit:generate
+
+<span class="c"># Verify code and contract consistency</span>
+mvn toolkit:verify
+</code></pre></div></div>
+
+<h4 id="221-extract-the-microservice-project-openapi-contract-file-and-document-from-the-code">2.2.1 Extract the microservice project, OpenAPI contract file and document from the code</h4>
+
+<p>Configuration(use default configuration if not set <code class="highlighter-rouge">&lt;configuration&gt;</code>)</p>
+
+<p>example</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- Set to 'code' to resolve the current project. Set to 'contract' to resolve the contract file for the specified path.If not set, the default is 'code' --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>code<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- The root directory to save contract file and document. If it is not set, the default is the 'target' under the directory where the command is run --&gt;</span>
+        <span class="nt">&lt;outputDirectory&gt;</span>./target<span class="nt">&lt;/outputDirectory&gt;</span>
+        <span class="c">&lt;!-- Generated microservice project configuration --&gt;</span>
+        <span class="nt">&lt;service&gt;</span>
+            <span class="c">&lt;!-- Microservice type,can generated 'provider/consumer/all',the default is 'all' --&gt;</span>
+            <span class="nt">&lt;serviceType&gt;</span>all<span class="nt">&lt;/serviceType&gt;</span>
+        <span class="nt">&lt;/service&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>Run in shell</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn toolkit:generate
+</code></pre></div></div>
+
+<p>When generating contracts from code,support for identifying restful interfaces written by the following annotations (class level)</p>
+<blockquote>
+  <p>RestController, RestSchema, RpcSchema, RequestMapping</p>
+</blockquote>
+
+<p>When generating contracts from code,the restful interface method access modifier must be specified as public</p>
+
+<h4 id="222-generate-the-microservice-project-and-document-from-contract">2.2.2 Generate the microservice project and document from contract</h4>
+
+<p>Configuration(use default configuration if not set <code class="highlighter-rouge">&lt;configuration&gt;</code>)</p>
+
+<p>example</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- Set to 'code' to resolve the current project. Set to 'contract' to resolve the contract file for the specified path.If not set, the default is 'code' --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>contract<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- The root directory to save contract file and document. If it is not set, the default is the 'target' under the directory where the command is run --&gt;</span>
+        <span class="nt">&lt;outputDirectory&gt;</span>./target<span class="nt">&lt;/outputDirectory&gt;</span>
+        <span class="c">&lt;!-- Input contract file path. Valid when sourceType is set to 'contract', must be set --&gt;</span>
+        <span class="nt">&lt;contractLocation&gt;</span>./contract<span class="nt">&lt;/contractLocation&gt;</span>
+        <span class="c">&lt;!-- Generated microservice project configuration --&gt;</span>
+        <span class="nt">&lt;service&gt;</span>
+            <span class="c">&lt;!-- Microservice type,can generated 'provider/consumer/all',the default is 'all' --&gt;</span>
+            <span class="nt">&lt;serviceType&gt;</span>provider<span class="nt">&lt;/serviceType&gt;</span>
+        <span class="nt">&lt;/service&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>Run in shell</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn toolkit:generate
+</code></pre></div></div>
+
+<h4 id="223-contract-verify">2.2.3 Contract verify</h4>
+
+<p>Configuration</p>
+
+<p>example</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;plugin&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb.toolkit<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>toolkit-maven-plugin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>0.2.0-SNAPSHOT<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;configuration&gt;</span>
+        <span class="c">&lt;!-- Set to 'code' to resolve the current project. Set to 'contract' to resolve the contract file for the specified path.If not set, the default is 'code' --&gt;</span>
+        <span class="nt">&lt;sourceType&gt;</span>code<span class="nt">&lt;/sourceType&gt;</span>
+        <span class="c">&lt;!-- Sample contract file path, must be set --&gt;</span>
+        <span class="nt">&lt;destinationContractPath&gt;</span>./contract<span class="nt">&lt;/destinationContractPath&gt;</span>
+    <span class="nt">&lt;/configuration&gt;</span>
+<span class="nt">&lt;/plugin&gt;</span>
+</code></pre></div></div>
+
+<p>Run in shell</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>mvn toolkit:verify
+</code></pre></div></div>
+
+<h3 id="3-use-the-toolkit-cli">3 Use the toolkit cli</h3>
+<p>The executable jar package is located in the toolkit/cli/target/bin directory</p>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar <span class="nb">help</span>
+</code></pre></div></div>
+<h4 id="31-service-contract-generation-microservice-project">3.1 Service contract generation microservice project</h4>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar  codegenerate <span class="nt">-m</span> ServiceComb <span class="nt">-i</span> swagger.yaml <span class="nt">-o</span> ./project <span class="nt">-p</span> SpringMVC
+</code></pre></div></div>
+<blockquote>
+  <p><strong>codegenerate</strong> Command option</p>
+  <ul>
+    <li>-m, –microservice-framework. Specify microservices framework, now supports ServiceComb.<br />
+e.g.：-m ServiceComb</li>
+    <li>-p, –programming-model. Specify programming model, optional JAX-RS, POJO, SpringMVC, SpringBoot.<br />
+e.g.：-p SpringMvc</li>
+    <li>-i, –input. Specifies contract files that follow the OpenAPI specification, supports yaml and json formats, and supports specifying local and network files.<br />
+e.g.：-i http://petstore.swagger.io/v2/swagger.json</li>
+    <li>-o, –output. Generated project code output path.<br />
+e.g.：-o ./project</li>
+    <li>–group-id. Specify the group id of the generated project.<br />
+e.g.：–group-id com.demo</li>
+    <li>–artifact-id. Specify the artifact id of the generated project.<br />
+e.g.：–artifact-id springmvc-example</li>
+    <li>–artifact-version. Specify the artifact version of the generated project. <br />
+e.g.：–artifact-version 1.0.0</li>
+    <li>–api-package : Specify the api package of the generated project. <br />
+e.g.：–api-package com.demo.api</li>
+    <li>–model-package : Specify the model package of the generated project.<br />
+e.g.：–model-package com.demo.model</li>
+    <li>-t, –service-type : Specify microservice type of generated microservice project. optional value is provider,consumer,all             <br />
+e.g.：–service-type provider</li>
+  </ul>
+</blockquote>
+
+<h4 id="32-service-contract-generation-document">3.2 Service contract generation document</h4>
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar docgenerate <span class="nt">-i</span> swagger.yaml <span class="nt">-o</span> ./document
+</code></pre></div></div>
+<blockquote>
+  <p><strong>docgenerate</strong> Command option</p>
+  <ul>
+    <li>-i, –input. Specifies contract files that follow the OpenAPI specification, supports yaml and json formats, and supports specifying local and network files.
+e.g：-i http://petstore.swagger.io/v2/swagger.json</li>
+    <li>-o, –output. Document output path.
+e.g：-o ./document</li>
+    <li>-f, –format. Specifies the output document format, now supports swagger-ui
+e.g：-f swagger-ui</li>
+  </ul>
+</blockquote>
+
+<h4 id="33-service-contract-style-checking">3.3 Service contract style checking</h4>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar checkstyle oas.yaml
+or
+<span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar cs oas.yaml
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>checkstyle</strong> Command argument</p>
+  <ul>
+    <li>&lt;file&gt; OpenAPI v3 spec yaml file</li>
+  </ul>
+</blockquote>
+
+<p>见<a href="/docs/toolkit/oas-validator/#style-check-rules">style check rules</a></p>
+
+<h4 id="34-service-contract-compatibility-checking">3.4 Service contract compatibility checking</h4>
+
+<div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar checkcompatibility left-oas.yaml right-oas.yaml
+or
+<span class="nv">$ </span>java <span class="nt">-jar</span> toolkit-cli-<span class="o">{</span>version<span class="o">}</span>.jar cc left-oas.yaml right-oas.yaml
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>checkcompatibility</strong> Command argument</p>
+  <ul>
+    <li>&lt;files&gt; Two OpenAPI v3 spec yaml file</li>
+  </ul>
+</blockquote>
+
+<p>见<a href="/docs/toolkit/oas-validator/#compatibility-check-rules">compatibilty check rules</a></p>
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+    <meta itemprop="headline" content="Distributed Tracing with ServiceComb and Zipkin">
+    <meta itemprop="description" content="A introduction of how to set up distributed tracing with ServiceComb and Zipkin">
+    <meta itemprop="datePublished" content="July 17, 2017">
+    <meta itemprop="dateModified" content="July 17, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Distributed Tracing with ServiceComb and Zipkin
+</h1>
+            
+              <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Microservice architecture solves many problems of monolithic applications, but it also comes with costs. Request latencies
+due to network instability is one of the prices we have to pay.</p>
+
+<p>In monolithic applications, modules are all running in one process and there's no such thing as communication issues among 
+modules. However, with microservice architecture, services are communicating through a network and we have to deal with all 
+network related issues, such as delays, timeouts, and partition.</p>
+
+<p>In addition, given more and more services deployed, we can easily lose the sight on how requests flow through
+the web of microservices in our applications. How can we monitor the network latencies and flow of requests through our system?</p>
+
+<h2 id="zipkin">Zipkin</h2>
+<blockquote>
+  <p><a href="http://zipkin.io/">Zipkin</a> is a distributed tracing system. It helps gather timing data needed to troubleshoot latency 
+problems in microservice architectures. It manages both the collection and lookup of this data. Zipkin’s design is based 
+on the Google <a href="http://research.google.com/pubs/pub36356.html">Dapper paper</a>.[1]</p>
+</blockquote>
+
+<p>ServiceComb integrates with Zipkin to provide automatic tracing, so that users can focus on fulfilling their business requirements.</p>
+
+<h2 id="instructions">Instructions</h2>
+<p>We will use the <a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">workshop demo</a> as an example to illustrate how
+to apply distributed tracing with Zipkin.</p>
+
+<h3 id="adding-dependencies">Adding Dependencies</h3>
+<p>A microservice written with ServiceComb Java Chassis just need to add one dependency below to its pom.xml.</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+
+</code></pre></div></div>
+
+<p>If the microservice is an API gateway with Spring Cloud + Zuul like manager service in the workshop demo, an additional 
+dependency has to be included.</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="configuring-tracing-handlers-and-collector">Configuring Tracing Handlers And Collector</h3>
+<p>In the configuration file <code class="highlighter-rouge">microservice.yaml</code> , apply tracing handlers and add tracing collector address.</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-consumer</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">tracing</span><span class="pi">:</span>
+    <span class="na">collector</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://zipkin.servicecomb.io:9411</span>
+</code></pre></div></div>
+
+<p>That's all! After two configuration additions and no change to a single line of code, distributed tracing with Zipkin is 
+enabled for microservices written with Java chassis.</p>
+
+<p><strong>Note</strong> If other dependencies in your project also include zipkin (e.g. Spring Cloud), it may cause runtime error due to
+conflict of incompatible zipkin versions. In such a case, you may need to explicitly declare the compatible zipkin version
+in your pom.</p>
+
+<h2 id="a-quick-demo">A Quick Demo</h2>
+<p>After enabled tracing in the workshop demo, we are able to showcase the tracing capability locally with docker.</p>
+<ol>
+  <li>
+    <p>Build all docker images of services in the workshop demo with command <code class="highlighter-rouge">mvn package -DskipTests -Pdocker</code> or <code class="highlighter-rouge">mvn package -DskipTests -Pdocker -Pdocker-machine</code>
+if you are using <a href="https://www.docker.com/products/docker-toolbox">Docker Toolbox</a></p>
+  </li>
+  <li>
+    <p>Run <code class="highlighter-rouge">docker-compose up</code> under workshop demo folder</p>
+  </li>
+  <li>
+    <p>Send requests to the demo application like what we did in the video below</p>
+  </li>
+  <li>
+    <p>Open Zipkin website in a browser, which is hosted in a docker container started at step 2, eg. http://docker.container.ip:9411</p>
+  </li>
+</ol>
+
+<!-- Courtesy of embedresponsively.com //-->
+<div class="responsive-video-container">
+
+  <iframe src="https://player.youku.com/embed/XMjg1NzQ3NzUzNg" frameborder="0" allowfullscreen=""></iframe>
+
+</div>
+
+<p>Now we should be able to see Zipkin homepage with a few traced services.
+<img src="/assets/images/tracing.1.png" alt="zipkin homepage" class="align-center" /></p>
+
+<p>If we choose manager and click Find Traces button, some traces will be displayed. Please don't mind the system performance
+being not very good, since we are running so many services in docker on a laptop manufactured in 2012.
+<img src="/assets/images/tracing.2.png" alt="traces of manager service" class="align-center" /></p>
+
+<p>We are also able to see the spans of an individual trace by clicking on it.
+<img src="/assets/images/tracing.3.png" alt="trace spans of manager service" class="align-center" /></p>
+
+<p>A more detailed timing information will be displayed if we click on any span in the trace.
+<img src="/assets/images/tracing.4.png" alt="span details of manager service" class="align-center" /></p>
+
+<p>Dependency graph of services can be helpful to gain insight on request flow, if we click on the Dependencies menu.
+<img src="/assets/images/tracing.5.png" alt="service dependencies" class="align-center" /></p>
+
+<h2 id="summary">Summary</h2>
+<p>As we can see, adding distributed tracing capability to microservices using ServiceComb is as easy as following 2 simple 
+steps as shown in the instruction section above. Doing so, we leverage the powerful features provided by Zipkin, such as
+analyzing timing data to troubleshoot network latencies among our microservices and gaining insight on our service dependencies.</p>
+
+<h2 id="references">References</h2>
+<ul>
+  <li>[1] <a href="http://zipkin.io/">Zipkin</a></li>
+</ul>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
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+    <span itemprop="keywords">
+    
+      
+      
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+</section>
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+            <h1 class="page__title" itemprop="headline">Application Boot-up Process
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+            
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+        
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+        <p>The starup process of a service provider includes initializing Log4j, loading bean(including its parameters), and registering service.</p>
+
+<ul>
+  <li>
+    <p>Initialize Log4j:</p>
+
+    <p>By default, <code class="highlighter-rouge">Log4jUtils</code> obtains the configuration of log4j from the <code class="highlighter-rouge">classpath\*:config/base/log4j.properties</code> and <code class="highlighter-rouge">classpath\*:config/log4j.properties</code> files. combines them, and transfer them to PropertyConfigurator of log4j to initialize log4j. If the configuration file having the highest priority is stored on the disk and its directory has write permission, save the combined configuration to this directory to view which parameters take effect during maintenance.</p>
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+  </li>
+  <li>
+    <p>Register the microservice.</p>
+
+    <p>After Spring context has been loaded, <code class="highlighter-rouge">org.apache.servicecomb.core.CseApplicationListener</code> will configure the handler, load the information about the provider schema, and the register microservice to service center.</p>
+  </li>
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+
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+  <p><strong>NOTE:</strong>
+The three level of configuration items for ServiceComb are the configuration center, environment variables, and local files, listed in a descending order by priority. If configuration items with the same name exist, the one in the highest level overwrites others. Configuration items stored in the configuration center can be modified during running.</p>
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content/docs/users/communicate-protocol/index.html

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+    <meta itemprop="dateModified" content="August 15, 2017">
+
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Communication Protocol
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#communication-protocol" id="markdown-toc-communication-protocol">Communication Protocol</a>    <ul>
+      <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+      <li><a href="#precautions" id="markdown-toc-precautions">Precautions</a></li>
+    </ul>
+  </li>
+  <li><a href="#thread-model" id="markdown-toc-thread-model">Thread Model</a>    <ul>
+      <li><a href="#concept-description-1" id="markdown-toc-concept-description-1">Concept Description</a></li>
+      <li><a href="#thread-model-1" id="markdown-toc-thread-model-1">Thread Model</a></li>
+    </ul>
+  </li>
+  <li><a href="#rest-over-servlet" id="markdown-toc-rest-over-servlet">REST over Servlet</a>    <ul>
+      <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a></li>
+      <li><a href="#sample-code" id="markdown-toc-sample-code">Sample Code</a></li>
+    </ul>
+  </li>
+  <li><a href="#rest-over-vertx" id="markdown-toc-rest-over-vertx">REST over Vertx</a>    <ul>
+      <li><a href="#configuration-1" id="markdown-toc-configuration-1">Configuration</a></li>
+      <li><a href="#sample-code-1" id="markdown-toc-sample-code-1">Sample Code</a></li>
+    </ul>
+  </li>
+  <li><a href="#highway-rpc-protocol" id="markdown-toc-highway-rpc-protocol">Highway RPC Protocol</a>    <ul>
+      <li><a href="#concept-description-2" id="markdown-toc-concept-description-2">Concept Description</a></li>
+      <li><a href="#configuration-2" id="markdown-toc-configuration-2">Configuration</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="communication-protocol">Communication Protocol</h2>
+<h3 id="concept-description">Concept Description</h3>
+
+<p>ServiceComb uses two network channels, REST and Highway, both supporting encrypted Transport Layer Security (TLS) transmission. The REST channel releases services in the standard RESTful form. The consumer can send requests using http client.</p>
+
+<h3 id="precautions">Precautions</h3>
+
+<p>Serialization of parameters and the returned values:</p>
+
+<p>Currently, the body parameters of the REST channel support only the application/json serialization. To send form-type parameters to the server, construct a body of the application/json format at the consumer end. Do not send the form type parameters in multipart/form-data format.</p>
+
+<p>Currently, the REST channel supports the application/json and text/plain serialization. A provider uses produces to declare that it has the serialization capability. The consumer specifies the serialization mode of the returned values by setting parameters regarding the requested Accept header. Data serialized in application/json serialization mode is returned by default.</p>
+
+<h2 id="thread-model">Thread Model</h2>
+<h3 id="concept-description-1">Concept Description</h3>
+
+<p>This section describes the thread model for ServiceComb microservices and the relationship between the I/O and service threads.</p>
+
+<h3 id="thread-model-1">Thread Model</h3>
+
+<p>The complete thread model of CSE is shown in the following figure.</p>
+
+<p><img src="/assets/images/thread-model-en.png" alt="" /></p>
+
+<blockquote>
+  <ol>
+    <li>When a service thread is called for the first time, it binds to a network thread to avoid thread conflicts caused by switching among different network threads.</li>
+    <li>After the service thread bound to a network thread, it will bind to a connection of the network to avoid thread conflicts.</li>
+  </ol>
+</blockquote>
+
+<ul>
+  <li>Multiple network threads (eventloop) can be bound to both the client and the server. The number of network threads is two times the quantity of the CPU cores by default. Multiple connections can be configured for each network thread, and the default number is 1. The Rest and Highway network channels are supported. For details about these configurations, see following sections:
+    <ul>
+      <li><a href="/users/communicate-protocol#rest-over-servlet">REST over Servlet</a></li>
+      <li><a href="/users/communicate-protocol/#rest-over-vertx">REST over Vertx</a></li>
+      <li><a href="/users/communicate-protocol/#highway-rpc协议">Highway RPC Protocol</a></li>
+    </ul>
+  </li>
+  <li>You can configure the service thread pool executor for the client, and the thread granularity can be schemaId: operation.</li>
+</ul>
+
+<p>Add the executors in the microservice.yaml file and configure an independent service thread pool for schemaId: operation:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span> 
+  <span class="na">executors</span><span class="pi">:</span> 
+    <span class="na">Provider</span><span class="pi">:</span> 
+      <span class="pi">[</span><span class="nv">schemaId</span><span class="pi">]</span><span class="s">.[operation]</span>
+</code></pre></div></div>
+
+<h2 id="rest-over-servlet">REST over Servlet</h2>
+<h3 id="configuration">Configuration</h3>
+
+<p>　　REST over Servlet is deployed and runs using a web container. You need to create a servlet project to pack the microservice, load it to the web container, and then start it. To pack a microservice, you can either fully configure it in the web.xml, or configure its listener and urlPattern in the web.xml and microservice.yaml files, respectively.</p>
+
+<ul>
+  <li>
+    <p>Configure the microservice in the web.xml file.</p>
+
+    <p>The web.xml file is under the src/main/webapp/WEB_INF directory of the project, and its content is as follows:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;web-app</span> <span class="na">xmlns=</span><span class="s">"http://java.sun.com/xml/ns/javaee"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span> <span class="na">xsi:schemaLocation=</span><span class="s">"http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"</span> <span class="na">version=</span><span class="s">"3.0"</span><span class="nt">&gt;</span>  
+   <span class="nt">&lt;context-param&gt;</span> 
+     <span class="nt">&lt;param-name&gt;</span>contextConfigLocation<span class="nt">&lt;/param-name&gt;</span>  
+     <span class="nt">&lt;param-value&gt;</span>classpath*:META-INF/spring/*.bean.xml classpath*:app-config.xml<span class="nt">&lt;/param-value&gt;</span> 
+   <span class="nt">&lt;/context-param&gt;</span>  
+   <span class="nt">&lt;listener&gt;</span> 
+     <span class="nt">&lt;listener-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServletContextListener<span class="nt">&lt;/listener-class&gt;</span> 
+   <span class="nt">&lt;/listener&gt;</span>  
+   <span class="nt">&lt;servlet&gt;</span> 
+     <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>  
+     <span class="nt">&lt;servlet-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServlet<span class="nt">&lt;/servlet-class&gt;</span>  
+     <span class="nt">&lt;load-on-startup&gt;</span>1<span class="nt">&lt;/load-on-startup&gt;</span>  
+     <span class="nt">&lt;async-supported&gt;</span>true<span class="nt">&lt;/async-supported&gt;</span> 
+   <span class="nt">&lt;/servlet&gt;</span>  
+   <span class="nt">&lt;servlet-mapping&gt;</span> 
+     <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>  
+     <span class="nt">&lt;url-pattern&gt;</span>/rest/*<span class="nt">&lt;/url-pattern&gt;</span> 
+   <span class="nt">&lt;/servlet-mapping&gt;</span> 
+ <span class="nt">&lt;/web-app&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Configure the listener in the web.xml file and urlPattern in the microservice.yaml file.</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;web-app</span> <span class="na">xmlns=</span><span class="s">"http://java.sun.com/xml/ns/javaee"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span> <span class="na">xsi:schemaLocation=</span><span class="s">"http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"</span> <span class="na">version=</span><span class="s">"3.0"</span><span class="nt">&gt;</span>  
+   <span class="nt">&lt;context-param&gt;</span> 
+     <span class="nt">&lt;param-name&gt;</span>contextConfigLocation<span class="nt">&lt;/param-name&gt;</span>  
+     <span class="nt">&lt;param-value&gt;</span>classpath*:META-INF/spring/*.bean.xml classpath*:app-config.xml<span class="nt">&lt;/param-value&gt;</span> 
+   <span class="nt">&lt;/context-param&gt;</span>  
+   <span class="nt">&lt;listener&gt;</span> 
+     <span class="nt">&lt;listener-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServletContextListener<span class="nt">&lt;/listener-class&gt;</span> 
+   <span class="nt">&lt;/listener&gt;</span> 
+ <span class="nt">&lt;/web-app&gt;</span>
+</code></pre></div>    </div>
+
+    <p>In the microservice.yaml file, add a row to specify the urlPattern：</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="s">servicecomb.rest.servlet.urlPattern</span><span class="pi">:</span> <span class="s">/rest/*</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>The two method are equivalent, and they both require that the following dependencies be added in the pox.xml file:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span> 
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>  
+  <span class="nt">&lt;artifactId&gt;</span>transport-rest-servlet<span class="nt">&lt;/artifactId&gt;</span> 
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>Configuration items that need to be set in the microservice.yaml file are described in Table 1:</p>
+
+<p>Table 1 Configuration items of REST over Servlet</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remark</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.address</td>
+      <td style="text-align: left">0.0.0.0:8080</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the server listening IP address.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.timeout</td>
+      <td style="text-align: left">3000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the timeout duration</td>
+      <td style="text-align: left">The unit is ms.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.request.timeout</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the request timeout duration.</td>
+      <td style="text-align: left">The configuration of this parameter for REST over Servlet is the same as that for REST over Vertx.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].transport</td>
+      <td style="text-align: left">rest</td>
+      <td style="text-align: left"> </td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the accessed transport type.</td>
+      <td style="text-align: left">The configuration of this parameter for REST over Servlet is the same as that for REST over Vertx.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].version-rule</td>
+      <td style="text-align: left">latest</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the version of the accessed instance.</td>
+      <td style="text-align: left">The configuration of this parameter for REST over Servlet is the same as that for REST over Vertx.</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="sample-code">Sample Code</h3>
+
+<p>The following is an example of the configuration in the microservice.yaml file for REST over Servlet:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+    <span class="na">timeout</span><span class="pi">:</span> <span class="m">3000</span>
+</code></pre></div></div>
+
+<h2 id="rest-over-vertx">REST over Vertx</h2>
+<h3 id="configuration-1">Configuration</h3>
+
+<p>The REST over Vertx communication channel uses the standalone running mode that can be started using the main function. In the main function, you need to initialize logs and load service configuration. The code is as follow:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">MainServer</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+  <span class="err">　</span><span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span><span class="c1">//Log initialization</span>
+  <span class="err">　</span><span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span> <span class="c1">// Spring bean initialization</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>To use the REST over Vertx communication channel, you need to add the following dependencies in the maven pom.xml file:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+　　<span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+　　<span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>Configuration items that need to be set in the microservice.yaml file are described as follows:</p>
+
+<p>Table 2 Configuration items of REST over Vertx</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remark</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.address</td>
+      <td style="text-align: left">0.0.0.0:8080</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the server listening IP address.</td>
+      <td style="text-align: left">Only service providers require this parameter.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.server.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of server threads.</td>
+      <td style="text-align: left">Only service providers require this parameter.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.client.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of client network threads.</td>
+      <td style="text-align: left">Only service consumers require this parameter.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.rest.client.connection-pool-per-thread</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of connection pools in each client thread.</td>
+      <td style="text-align: left">Only service consumers require this parameter.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.request.timeout</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the request timeout duration.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].transport</td>
+      <td style="text-align: left">rest</td>
+      <td style="text-align: left"> </td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the accessed transport type.</td>
+      <td style="text-align: left">Only service consumers require this parameter.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].version-rule</td>
+      <td style="text-align: left">latest</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the version of the accessed instance.</td>
+      <td style="text-align: left">Only service consumers require this parameter. You can set it to latest, a version range such as 1.0.0+ or 1.0.0-2.0.2, or a specific version number. For details, see the API description of the service center.</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="sample-code-1">Sample Code</h3>
+
+<p>An example of the configuration in the microservice.yaml file for REST over Vertx is as follows:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+    <span class="na">thread-count</span><span class="pi">:</span> <span class="m">1</span>
+  <span class="na">references</span><span class="pi">:</span>
+    <span class="na">hello</span><span class="pi">:</span>
+      <span class="na">transport</span><span class="pi">:</span> <span class="s">rest</span>
+      <span class="na">version-rule</span><span class="pi">:</span> <span class="s">0.0.1</span>
+</code></pre></div></div>
+
+<h2 id="highway-rpc-protocol">Highway RPC Protocol</h2>
+<h3 id="concept-description-2">Concept Description</h3>
+
+<p>Highway is a high-performance proprietary protocol of ServiceComb, and you can use it in scenarios having special performance requirements.</p>
+
+<h3 id="configuration-2">Configuration</h3>
+
+<p>To use the Highway communication channel, you need to add the following dependencies in the maven pom.xml file:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span> 
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>  
+  <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span> 
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>Configuration items that need to be set in the microservice.yaml file are described as follows:</p>
+
+<p>Table 3 Configuration items of Highway</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remark</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.address</td>
+      <td style="text-align: left">0.0.0.0:7070</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the server listening IP address.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.server.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of server network threads.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.client.thread-count</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of client network threads.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.highway.client.connection-pool-per-thread</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of connection pools in each client thread.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.request.timeout</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the request timeout duration.</td>
+      <td style="text-align: left">The configuration of this parameter for Highway is the same as that for REST over Vertx.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].transport</td>
+      <td style="text-align: left">rest</td>
+      <td style="text-align: left"> </td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the accessed transport type.</td>
+      <td style="text-align: left">The configuration of this parameter for Highway is the same as that for REST over Vertx.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.references.[服务名].version-rule</td>
+      <td style="text-align: left">latest</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the version of the accessed instance.</td>
+      <td style="text-align: left">The configuration of this parameter for Highway is the same as that for REST over Vertx.</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>###</p>
+
+<p>An example of the configuration in the microservice.yaml file for Highway is as follows:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070</span>
+</code></pre></div></div>
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+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-disctiption" id="markdown-toc-concept-disctiption">Concept Disctiption</a></li>
+  <li><a href="#prerequisites" id="markdown-toc-prerequisites">Prerequisites</a></li>
+  <li><a href="#precautions" id="markdown-toc-precautions">Precautions</a></li>
+  <li><a href="#customized-dotting-call-chain" id="markdown-toc-customized-dotting-call-chain">Customized Dotting Call Chain</a></li>
+  <li><a href="#procedure" id="markdown-toc-procedure">Procedure:</a>    <ul>
+      <li><a href="#add-dependency" id="markdown-toc-add-dependency">Add dependency</a></li>
+      <li><a href="#enable-customized-dotting" id="markdown-toc-enable-customized-dotting">Enable customized dotting</a></li>
+      <li><a href="#customize-dotting" id="markdown-toc-customize-dotting">Customize dotting</a></li>
+    </ul>
+  </li>
+  <li><a href="#customize-reported-data" id="markdown-toc-customize-reported-data">Customize reported data</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-disctiption">Concept Disctiption</h2>
+
+<p>A distributed call chain tracking records the service calling sequence, but developers also need information about link invocation inside a microservice to describe a complete call chain. In this way, they can locate error and identify potential performance problems more easily.</p>
+
+<h2 id="prerequisites">Prerequisites</h2>
+
+<ul>
+  <li>To use the customized dotting function, you need to configure and set the Java Chassis microservice call chain.</li>
+</ul>
+
+<h2 id="precautions">Precautions</h2>
+
+<ul>
+  <li>The customized dotting that uses the <code class="highlighter-rouge">@Span</code> annotation can only be called using the thread that calls Java Chassis.</li>
+  <li>To add the <code class="highlighter-rouge">@Span</code> annotation, you must use the Bean method of Spring. Otherwise, you need to configure dotting following the procedure in this section.</li>
+</ul>
+
+<h2 id="customized-dotting-call-chain">Customized Dotting Call Chain</h2>
+
+<p>This function integrates Zipkin and provides the <code class="highlighter-rouge">@Span</code> annotation to customize dotting for the method you want to track. Java Chassis automatically tracks all the methods that track the <code class="highlighter-rouge">@Span</code> annotation, associating the local method call information with the call information between services.</p>
+
+<h2 id="procedure">Procedure:</h2>
+
+<h3 id="add-dependency">Add dependency</h3>
+
+<p>For microservices based on ServiceComb Java Chassis, add the following content to pom.xml</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="enable-customized-dotting">Enable customized dotting</h3>
+
+<p>Addthe <code class="highlighter-rouge">@EnableZipkinTracing</code> annotation to the application portal or the Spring configuration class:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@SpringBootApplication</span>
+<span class="nd">@EnableZipkinTracing</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">ZipkinSpanTestApplication</span> <span class="o">{</span>
+  <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ZipkinSpanTestApplication</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<h3 id="customize-dotting">Customize dotting</h3>
+
+<p>Add the <code class="highlighter-rouge">@Span</code> annotation to the method that requires dotting customization:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SlowRepoImpl</span> <span class="kd">implements</span> <span class="nc">SlowRepo</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">static</span> <span class="kd">final</span> <span class="nc">Logger</span> <span class="n">logger</span> <span class="o">=</span> <span class="nc">LoggerFactory</span><span class="o">.</span><span class="na">getLogger</span><span class="o">(</span><span class="nc">SlowRepoImpl</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Random</span> <span class="n">random</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Random</span><span class="o">();</span>
+
+  <span class="nd">@Span</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">crawl</span><span class="o">()</span> <span class="kd">throws</span> <span class="nc">InterruptedException</span> <span class="o">{</span>
+    <span class="n">logger</span><span class="o">.</span><span class="na">info</span><span class="o">(</span><span class="s">"in /crawl"</span><span class="o">);</span>
+    <span class="nc">Thread</span><span class="o">.</span><span class="na">sleep</span><span class="o">(</span><span class="n">random</span><span class="o">.</span><span class="na">nextInt</span><span class="o">(</span><span class="mi">200</span><span class="o">));</span>
+    <span class="k">return</span> <span class="s">"crawled"</span><span class="o">;</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>In this way, Zipkin-based customized dotting is enabled using the @Span annotation.</p>
+
+<h2 id="customize-reported-data">Customize reported data</h2>
+
+<p>The call chain reported by customized dotting contains the following pieces of data:</p>
+
+<ul>
+  <li><strong>span name</strong> which is the full name of the annotated method by default.</li>
+  <li>
+    <p><strong>call.path</strong>  which is the signature of the annotated method by default.</p>
+
+    <p>For example, the data reported in SlowRepoImp is as follows:</p>
+  </li>
+</ul>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">key</th>
+      <th style="text-align: left">value</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">span name</td>
+      <td style="text-align: left">crawl</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">call.path</td>
+      <td style="text-align: left">public abstract java.lang.String org.apache.servicecomb.tests.tracing.SlowRepo.crawl() throws java.lang.InterruptedException</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>To customize reported data, you can specify customized parameters:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="kd">public</span> <span class="kd">static</span> <span class="kd">class</span> <span class="nc">CustomSpanTask</span> <span class="o">{</span>
+    <span class="nd">@Span</span><span class="o">(</span><span class="n">spanName</span> <span class="o">=</span> <span class="s">"transaction1"</span><span class="o">,</span> <span class="n">callPath</span> <span class="o">=</span> <span class="s">"startA"</span><span class="o">)</span>
+    <span class="kd">public</span> <span class="nc">String</span> <span class="nf">invoke</span><span class="o">()</span> <span class="o">{</span>
+      <span class="k">return</span> <span class="s">"invoke the method"</span><span class="o">;</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+</code></pre></div></div>
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+    <meta itemprop="headline" content="Develop Microservice with JAX-RS">
+    <meta itemprop="description" content="Develop Microservice with JAX-RS">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Develop Microservice with JAX-RS
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#development-example" id="markdown-toc-development-example">Development Example</a></li>
+  <li><a href="#involved-apis" id="markdown-toc-involved-apis">Involved APIs</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>ServiceComb supports developers in developing services in JAX-RS mode by using JAX-RS.</p>
+
+<h2 id="development-example">Development Example</h2>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Import dependencies into your maven project:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="c">&lt;!--transport can optional import through endpoint setting in microservice.yaml, we import both rest and highway as example--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>provider-jaxrs<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>slf4j-log4j12<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Implement the service. JAX-RS is used to describe the development of service code. The implementation of the Hello service is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">javax.ws.rs.POST</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">javax.ws.rs.Path</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">javax.ws.rs.Produces</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+ <span class="nd">@Path</span><span class="o">(</span><span class="s">"/jaxrshello"</span><span class="o">)</span>
+ <span class="nd">@Produces</span><span class="o">(</span><span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">JaxrsHelloImpl</span> <span class="o">{</span>
+   <span class="nd">@Path</span><span class="o">(</span><span class="s">"/sayhi"</span><span class="o">)</span>
+   <span class="nd">@POST</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+   <span class="err">　</span><span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@Path</span><span class="o">(</span><span class="s">"/sayhello"</span><span class="o">)</span>
+   <span class="nd">@POST</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><strong>Note: PLEASE MAKE SURE TO MARK @Path ON YOUR PRODUCER(JaxrsHelloImpl), OR THE PATH AND METHOD OF PUBLISHED WILL BE INCORRECT!</strong></p>
+
+    <p>In this sample the Path of sayHi is <code class="highlighter-rouge">/jaxrshello/sayhi</code>, and the Path of sayHello is <code class="highlighter-rouge">/jaxrshello/sayhello</code>, if you wish them <code class="highlighter-rouge">/sayhi</code> and <code class="highlighter-rouge">/sayhello</code>, please change the setting of <code class="highlighter-rouge">@Path</code> on the JaxrsHelloImpl to <code class="highlighter-rouge">@Path("/")</code>.</p>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Release the service. Add <code class="highlighter-rouge">@RestSchema</code> as the annotation of the service implementation class and specify schemaID, which indicates that the implementation is released as a schema of the current microservice. The code is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+ <span class="c1">// other code omitted</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"jaxrsHello"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">JaxrsHelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="c1">// other code omitted</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>Create the jaxrsHello.bean.xml file in the resources/META-INF/spring directory and configure base-package that performs scanning. The content of the file is as follows:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+        <span class="na">xmlns:p=</span><span class="s">"http://www.springframework.org/schema/p"</span> <span class="na">xmlns:util=</span><span class="s">"http://www.springframework.org/schema/util"</span>
+        <span class="na">xmlns:cse=</span><span class="s">"http://www.huawei.com/schema/paas/cse/rpc"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.huawei.com/schema/paas/cse/rpc classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span class="nt">&gt;</span>
+
+     <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.jaxrs.provider"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 4</strong> Add service definition file:</p>
+
+    <p>Add <a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a> file into resources folder of your project.</p>
+  </li>
+  <li>
+    <p><strong>Step 5</strong> Add Main class:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+      <span class="c1">//initializing log, loading bean(including its parameters), and registering service, more detail can be found here :  https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/bootup.html</span>
+      <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+      <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="involved-apis">Involved APIs</h2>
+
+<p>Currently, the JAX-RS development mode supports the following annotation. For details about how to use JAX-RS, see <a href="https://jax-rs-spec.java.net/nonav/2.0-rev-a/apidocs/index.html">JAX-RS official documentation</a>。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Remarks</th>
+      <th style="text-align: left">Location</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.Path</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">URL path</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.Produces</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Coding/decoding capability supported by the method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.DELETE</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.GET</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.POST</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.PUT</td>
+      <td style="text-align: left">operation</td>
+      <td style="text-align: left">http method</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.QueryParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from query string</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.PathParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from path, This parameter must be defined in path.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.HeaderParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from header.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">javax.ws.rs.CookieParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from cookie.</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p><strong>NOTE</strong>：</p>
+  <ul>
+    <li>When the method parameter has no annotation and is not an HttpServletRequest parameter, the parameter is of the body type by default. One method supports a maximum of one body-typed parameter.</li>
+    <li>You are advised to explicitly define the value of the parameter. Otherwise, the parameter name in the API definition is used, such as <code class="highlighter-rouge">@QueryParam\("name"\) String name</code> String name instead of <code class="highlighter-rouge">@QueryParam String name</code>.</li>
+  </ul>
+</blockquote>
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+      
+      <div class="back-to-home"><a href="/">Home</a> > Develop with Rest Template</div>
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+          
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+          
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+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Kie User Guide</span>
+        
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+          
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+    <meta itemprop="headline" content="Develop with Rest Template">
+    <meta itemprop="description" content="Develop with Rest Template">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Develop with Rest Template
+</h1>
+            
+          </header>
+        
+      
+
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#sample-code" id="markdown-toc-sample-code">Sample Code</a></li>
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+
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+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>　　Rest Template is a RESTful API provide by the Spring framework.  ServiceComb provides the API for service calling</p>
+
+<h2 id="scenario">Scenario</h2>
+
+<p>　　You can call microservices using your customized URL and the RestTemplate instance provided by ServiceComb regardless of the specific address of the service.</p>
+
+<h2 id="sample-code">Sample Code</h2>
+
+<p>　　Obtain RestTemplate by calling <code class="highlighter-rouge">RestTemplateBuilder.create()</code>. Then, use the instance and the customized URL to call microservices. The code is as follows:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.springframework.stereotype.Component</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.springframework.web.client.RestTemplate</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.springmvc.reference.RestTemplateBuilder</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+<span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcConsumerMain</span> <span class="o">{</span>
+    <span class="kd">private</span> <span class="kd">static</span> <span class="nc">RestTemplate</span> <span class="n">restTemplate</span> <span class="o">=</span> <span class="nc">RestTemplateBuilder</span><span class="o">.</span><span class="na">create</span><span class="o">();</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="n">init</span><span class="o">();</span>
+        <span class="nc">Person</span> <span class="n">person</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">();</span>
+        <span class="n">person</span><span class="o">.</span><span class="na">setName</span><span class="o">(</span><span class="s">"ServiceComb/Java Chassis"</span><span class="o">);</span>
+        <span class="nc">String</span> <span class="n">sayHiResult</span> <span class="o">=</span> <span class="n">restTemplate</span>
+                <span class="o">.</span><span class="na">postForObject</span><span class="o">(</span><span class="s">"cse://springmvc/springmvchello/sayhi?name=Java Chassis"</span><span class="o">,</span> <span class="kc">null</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+        <span class="nc">String</span> <span class="n">sayHelloResult</span> <span class="o">=</span> <span class="n">restTemplate</span>
+                <span class="o">.</span><span class="na">postForObject</span><span class="o">(</span><span class="s">"cse://springmvc/springmvchello/sayhello"</span><span class="o">,</span> <span class="n">person</span><span class="o">,</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"RestTemplate consumer sayhi services: "</span> <span class="o">+</span> <span class="n">sayHiResult</span><span class="o">);</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"RestTemplate consumer sayhello services: "</span> <span class="o">+</span> <span class="n">sayHelloResult</span><span class="o">);</span>
+    <span class="o">}</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">()</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>NOTE:</p>
+  <ul>
+    <li>The URL must be in format of ServiceComb: <code class="highlighter-rouge">cse://microserviceName/path?querystring</code>. Use the provider defined in <a href="/users/develop-with-springmvc/">Develop Microservice with SpringMVC</a> as an example. The microservice name is <code class="highlighter-rouge">springmvc</code>, and its base path is <code class="highlighter-rouge">/springmvchello</code>, so you should set microserviceName in the URL to  <code class="highlighter-rouge">springmvchello/sayhi</code> when requesting sayhi. Therefore, the URL for requesting sayhi is  <code class="highlighter-rouge">cse://springmvc/springmvchello/sayhi?name=Java Chassis</code>.</li>
+    <li>During use of this URL format, the ServiceComb framework will perform internal microservice descovery, fallbreak, and fault tolerance and send the requests to the microservice providers.</li>
+  </ul>
+</blockquote>
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content/docs/users/develop-with-rpc/index.html

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+    <meta itemprop="headline" content="Develop with RPC">
+    <meta itemprop="description" content="Develop with RPC">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Develop with RPC
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#sample-code" id="markdown-toc-sample-code">Sample Code</a>    <ul>
+      <li><a href="#additional-explanation-for-consumer-invocation" id="markdown-toc-additional-explanation-for-consumer-invocation">Additional explanation for consumer invocation</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>The RPC development mode allows you to add annotations on the microservice APIs to generate the service provider agent. In this case, you can call microservices.</p>
+
+<h2 id="sample-code">Sample Code</h2>
+
+<p>To call a microservice, you only need to declare a member of a service API type and add the @RpcReference annotation for the member, the microservice that depends on the declaration, and the schemaID. The sample code is as follows.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.springframework.stereotype.Component</span><span class="o">;</span>
+
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.pojo.RpcReference</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.Hello</span><span class="o">;</span>
+<span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+<span class="nd">@Component</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">CodeFirstConsumerMain</span> <span class="o">{</span>
+    <span class="nd">@RpcReference</span><span class="o">(</span><span class="n">microserviceName</span> <span class="o">=</span> <span class="s">"codefirst"</span><span class="o">,</span> <span class="n">schemaId</span> <span class="o">=</span> <span class="s">"codeFirstHello"</span><span class="o">)</span>
+    <span class="kd">private</span> <span class="kd">static</span> <span class="nc">Hello</span> <span class="n">hello</span><span class="o">;</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="n">init</span><span class="o">();</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">hello</span><span class="o">.</span><span class="na">sayHi</span><span class="o">(</span><span class="s">"Java Chassis"</span><span class="o">));</span>
+        <span class="nc">Person</span> <span class="n">person</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">();</span>
+        <span class="n">person</span><span class="o">.</span><span class="na">setName</span><span class="o">(</span><span class="s">"ServiceComb/Java Chassis"</span><span class="o">);</span>
+        <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">hello</span><span class="o">.</span><span class="na">sayHello</span><span class="o">(</span><span class="n">person</span><span class="o">));</span>
+    <span class="o">}</span>
+
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">()</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+    <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>In the preceding code, the microservice consumers have obtained the microservice API Hello of the microservice provider and declared a member of the Hello type. The annotation <code class="highlighter-rouge">@RPCReference</code> on <code class="highlighter-rouge">Hello</code> specifies the microservice name and schemaId, The ServiceComb framework can obtain information about isntances from a certain provider during program startup and generate an agent to insert to Hello. This allows you to call a remote service in the same way as you call a local class.</p>
+
+<h3 id="additional-explanation-for-consumer-invocation">Additional explanation for consumer invocation</h3>
+<p>In above example, in order to direct use <code class="highlighter-rouge">hello</code> in main function, we mark it as <code class="highlighter-rouge">static</code>. As a local field of <code class="highlighter-rouge">CodeFirstConsumerMain</code>, we recommend get it use these two way :</p>
+
+<h4 id="first-way-define-cserpc-reference">First way: define cse:rpc-reference</h4>
+<p>In your bean.xml, add <code class="highlighter-rouge">cse:rpc-reference</code> configuration:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;cse:rpc-reference</span> <span class="na">id=</span><span class="s">"hello"</span> <span class="na">microservice-name=</span><span class="s">"codefirst"</span>
+    <span class="na">schema-id=</span><span class="s">"codeFirstHello"</span> <span class="na">interface=</span><span class="s">"org.apache.servicecomb.samples.common.schema.Hello"</span><span class="nt">&gt;&lt;/cse:rpc-reference&gt;</span>
+</code></pre></div></div>
+
+<p>Then use <code class="highlighter-rouge">BeanUtils.getBean</code> to get <code class="highlighter-rouge">Hello</code> provider:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Hello</span> <span class="n">hello</span> <span class="o">=</span> <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">getBean</span><span class="o">(</span><span class="s">"hello"</span><span class="o">);</span>
+</code></pre></div></div>
+
+<h4 id="second-way-get-bean-then-use-field">Second way: get Bean, then use field</h4>
+<p>First use <code class="highlighter-rouge">BeanUtils.getBean</code> to get Bean of <code class="highlighter-rouge">CodeFirstConsumerMain</code>:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1">//Default instance name of Spring Bean is same as class name with first char low-cased</span>
+<span class="nc">CodeFirstConsumerMain</span> <span class="n">consumer</span> <span class="o">=</span> <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">getBean</span><span class="o">(</span><span class="s">"codeFirstConsumerMain"</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p>Then get <code class="highlighter-rouge">hello</code> via Getter：</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="nc">Hello</span> <span class="nf">getHello</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="n">hello</span><span class="o">;</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Hello</span> <span class="n">hello</span> <span class="o">=</span> <span class="n">consumer</span><span class="o">.</span><span class="na">getHello</span><span class="o">()</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>NOTE:
+<code class="highlighter-rouge">BeanUtils.getBean</code> has inner lock so performacen is low , we recommend use once and cache return as local field for future use(such as in constructor).</p>
+</blockquote>
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+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Develop Microservice with Spring Boot Starter
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a>    <ul>
+      <li><a href="#spring-boot-framework" id="markdown-toc-spring-boot-framework"><strong>Spring Boot framework</strong></a></li>
+      <li><a href="#integrating-spring-boot-into-serviccomb" id="markdown-toc-integrating-spring-boot-into-serviccomb"><strong>Integrating Spring Boot into ServicComb</strong></a></li>
+    </ul>
+  </li>
+  <li><a href="#development-example" id="markdown-toc-development-example">Development Example</a></li>
+  <li><a href="#involved-apis" id="markdown-toc-involved-apis">Involved APIs</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+<h3 id="spring-boot-framework"><strong>Spring Boot framework</strong></h3>
+<p>Spring Boot is a new framework provided by the Pivotal team. It is designed to simplify the initial establishment and development of new Spring applications. The framework is configured in a specific manner so that developers do not need to define the sample configuration. Spring Boot is a collection of some databases and can be used by the construction system of any projects. The Boot function is modularized. By importing the starter module of Spring Boot, you can add many dependencies to a project.</p>
+<h3 id="integrating-spring-boot-into-serviccomb"><strong>Integrating Spring Boot into ServicComb</strong></h3>
+<p>You need to use the native Java Chassis framework to develop microservice applications. To use the functions provided by the Java Chassis framework, add dependency packages to the POM file of microservice project. For example, to use the load balancing service provided by the Java Chassis framework, add the dependency package of the handler-loadbalance package. In this way, functions provided by ServiceComb can be inserted into Spring Boot in the manner of starter, and the microservice can be built together with the starter (such as Spring Cloud) provided by Spring Boot.</p>
+<h2 id="development-example">Development Example</h2>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Import dependencies into your maven project:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependencyManagement&gt;</span>
+     <span class="nt">&lt;dependencies&gt;</span>
+       <span class="nt">&lt;dependency&gt;</span>
+         <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+         <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+         <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+         <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+         <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+       <span class="nt">&lt;/dependency&gt;</span>
+     <span class="nt">&lt;/dependencies&gt;</span>
+ <span class="nt">&lt;/dependencyManagement&gt;</span>
+ <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter<span class="nt">&lt;/artifactId&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+     <span class="c">&lt;!--spring-boot-starter-provider had included transport-rest-vertx and transport-highway--&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.hibernate<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>hibernate-validator<span class="nt">&lt;/artifactId&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Implement the services. Spring MVC is used to describe the development of service code. The implementation of the Hello service is as follow:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestBody</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMapping</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMethod</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestParam</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/springmvchello"</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhi"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nd">@RequestParam</span><span class="o">(</span><span class="n">name</span> <span class="o">=</span> <span class="s">"name"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhello"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+ <span class="err">　</span><span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><strong>Note: PLEASE MAKE SURE TO MARK @RequestMapping ON YOUR PRODUCER(SpringmvcHelloImpl), OR THE PATH AND METHOD OF PUBLISHED WILL BE INCORRECT!</strong></p>
+
+    <p>In this sample the Path of sayHi is <code class="highlighter-rouge">/springmvchello/sayhi</code>, and the Path of sayHello is <code class="highlighter-rouge">/springmvchello/sayhello</code>, if you wish them <code class="highlighter-rouge">/sayhi</code> and <code class="highlighter-rouge">/sayhello</code>, please change the setting of <code class="highlighter-rouge">@RequestMapping</code> on the SpringmvcHelloImpl to <code class="highlighter-rouge">@RequestMapping("/")</code>.</p>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Release the service. Add @RestSchema as the annotation of the service implementation class and specify schemaId, which indicates that the implementation is released as a schema of the current microservice. The code is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+ <span class="c1">// other code omitted</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"springmvcHello"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="c1">// other code omitted</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>Create the <code class="highlighter-rouge">springmvcHello.bean.xml</code>  file(the file name format is *.bean.xml) in the <code class="highlighter-rouge">resources/META-INF/spring</code> directory and configure base-package that performs scanning. The content of the file is as follows:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span>
+        <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd
+        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"</span><span class="nt">&gt;</span>
+
+     <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.springmvc.provider"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<blockquote>
+  <p><strong>NOTE</strong>：
+Spring Boot had include a default Bean discovery policy, if Spring Boot can found our <code class="highlighter-rouge">SpringmvcHelloImpl</code>, <code class="highlighter-rouge">springmvcHello.bean.xml</code> is not necessary.</p>
+</blockquote>
+
+<ul>
+  <li>
+    <p><strong>Step 4</strong> Add service definition file:</p>
+
+    <p>Add <a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a> file into resources folder of your project.</p>
+  </li>
+  <li>
+    <p><strong>Step 5</strong> Add Main class:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="kn">import</span> <span class="nn">org.apache.servicecomb.springboot.starter.provider.EnableServiceComb</span><span class="o">;</span>
+  <span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
+  <span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
+
+  <span class="nd">@SpringBootApplication</span>
+  <span class="c1">//EnableServiceComb annotation is used to init ServiceComb in Spring Boot</span>
+  <span class="nd">@EnableServiceComb</span>
+  <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+    <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+      <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">Application</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="involved-apis">Involved APIs</h2>
+
+<p>Spring Boot Starter also use the Spring MVC development mode, supports the following annotations in the org.springframework.web.bind.annotation package. For details about how to use the annotations, see <a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html">Spring MVC official documentation</a>。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Remarks</th>
+      <th style="text-align: left">Location</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">RequestMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path, method or produces is allowed. By default, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">GetMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed. By default, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PutMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PostMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">DeleteMapping</td>
+      <td style="text-align: left">schema/operation</td>
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+          <header>
+            <h1 class="page__title" itemprop="headline">Develop Microservice with SpringMVC
+</h1>
+            
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+        
+      
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#development-example" id="markdown-toc-development-example">Development Example</a></li>
+  <li><a href="#involved-apis" id="markdown-toc-involved-apis">Involved APIs</a></li>
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+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>ServiceComb supports Spring MVC remark and allows you to develop microservices in Spring MVC mode.</p>
+
+<h2 id="development-example">Development Example</h2>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Import dependencies into your maven project:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="c">&lt;!--transport can optional import through endpoint setting in microservice.yaml, we import both rest and highway as example--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>provider-springmvc<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>slf4j-log4j12<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Implement the services. Spring MVC is used to describe the development of service code. The implementation of the Hello service is as follow:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">javax.ws.rs.core.MediaType</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestBody</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMapping</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMethod</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestParam</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/springmvchello"</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="nc">MediaType</span><span class="o">.</span><span class="na">APPLICATION_JSON</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhi"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nd">@RequestParam</span><span class="o">(</span><span class="n">name</span> <span class="o">=</span> <span class="s">"name"</span><span class="o">)</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/sayhello"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">POST</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+ <span class="err">　</span>  <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+ <span class="err">　</span><span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p><strong>Note: PLEASE MAKE SURE TO MARK @RequestMapping ON YOUR PRODUCER(SpringmvcHelloImpl), OR THE PATH AND METHOD OF PUBLISHED WILL BE INCORRECT!</strong></p>
+
+    <p>In this sample the Path of sayHi is <code class="highlighter-rouge">/springmvchello/sayhi</code>, and the Path of sayHello is <code class="highlighter-rouge">/springmvchello/sayhello</code>, if you wish them <code class="highlighter-rouge">/sayhi</code> and <code class="highlighter-rouge">/sayhello</code>, please change the setting of <code class="highlighter-rouge">@RequestMapping</code> on the SpringmvcHelloImpl to <code class="highlighter-rouge">@RequestMapping("/")</code>.</p>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Release the service. Add @RestSchema as the annotation of the service implementation class and specify schemaId, which indicates that the implementation is released as a schema of the current microservice. The code is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.rest.common.RestSchema</span><span class="o">;</span>
+ <span class="c1">// other code omitted</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"springmvcHello"</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringmvcHelloImpl</span> <span class="o">{</span>
+   <span class="c1">// other code omitted</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>Create the <code class="highlighter-rouge">springmvcHello.bean.xml</code>  file(the file name format is *.bean.xml) in the <code class="highlighter-rouge">resources/META-INF/spring</code> directory and configure base-package that performs scanning. The content of the file is as follows:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span>
+        <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd
+        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"</span><span class="nt">&gt;</span>
+
+     <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.springmvc.provider"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 4</strong> Add service definition file:</p>
+
+    <p>Add <a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a> file into resources folder of your project.</p>
+  </li>
+  <li>
+    <p><strong>Step 5</strong> Add Main class:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+      <span class="c1">//initializing log, loading bean(including its parameters), and registering service, more detail can be found here : https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/bootup.html</span>
+      <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+      <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="involved-apis">Involved APIs</h2>
+
+<p>Currently, the Spring MVC development mode supports the following annotations in the org.springframework.web.bind.annotation package. For details about how to use the annotations, see <a href="https://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html">Spring MVC official documentation</a>。</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Remarks</th>
+      <th style="text-align: left">Location</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">RequestMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path, method or produces is allowed. By default, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">GetMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed. By default, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PutMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PostMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">DeleteMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PatchMapping</td>
+      <td style="text-align: left">schema/operation</td>
+      <td style="text-align: left">Data of path or produces is allowed, an operation inherits produces from a schema.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">PathVariable</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from path.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">RequestParam</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from query.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">RequestHeader</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from header.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">RequestBody</td>
+      <td style="text-align: left">parameter</td>
+      <td style="text-align: left">Obtain parameters from body. Each operation can have only one body parameter.</td>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Develop Microservice with Transparent RPC">
+    <meta itemprop="description" content="Develop Microservice with Transparent RPC">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Develop Microservice with Transparent RPC
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#development-example" id="markdown-toc-development-example">Development Example</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>The transparent remote procedure call(RPC) development mode is a development mode based on API and API implementation. The service developer does not need to use the description of Spring MVC and JAX-RS.</p>
+
+<h2 id="development-example">Development Example</h2>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Import dependencies into your maven project:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+  <span class="nt">&lt;/dependencyManagement&gt;</span>
+  <span class="nt">&lt;dependencies&gt;</span>
+    <span class="c">&lt;!--transport can optional import through endpoint setting in microservice.yaml, we import both rest and highway as example--&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-rest-vertx<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>transport-highway<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>provider-pojo<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.slf4j<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>slf4j-log4j12<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;/dependencies&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Define a service API. Compile the Java API definition based on the API definition defined before development. The code is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">interface</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">);</span>
+   <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> implement the service. The implementation of the Hello service is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.Hello</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.samples.common.schema.models.Person</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 4</strong> Release the service. 
+ The transparent RPC development mode supports two service release mode: Spring XML configuration and Annotation configuration:</p>
+    <ol>
+      <li>Spring XML configuration Mode:
+ Create the pojoHello.bean.xml file in the resources/META-INF/spring directory and declare the schema in the file. The content of the file is as follows:</li>
+    </ol>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+        <span class="na">xmlns:p=</span><span class="s">"http://www.springframework.org/schema/p"</span> <span class="na">xmlns:util=</span><span class="s">"http://www.springframework.org/schema/util"</span>
+        <span class="na">xmlns:cse=</span><span class="s">"http://www.huawei.com/schema/paas/cse/rpc"</span>
+        <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.huawei.com/schema/paas/cse/rpc classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span class="nt">&gt;</span>
+
+     <span class="nt">&lt;cse:rpc-schema</span> <span class="na">schema-id=</span><span class="s">"pojoHello"</span> <span class="na">implementation=</span><span class="s">"org.apache.servicecomb.samples.pojo.provider.PojoHelloImpl"</span><span class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<ol>
+  <li>
+    <p>Annotation configuration Mode:
+@RpcSchema is used to define schema during the API Hello implementation. The code is as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">org.apache.servicecomb.provider.pojo.RpcSchema</span><span class="o">;</span>
+<span class="nd">@RpcSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"pojoHello"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloImpl</span> <span class="kd">implements</span> <span class="nc">Hello</span> <span class="o">{</span>
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHi</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello "</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+ 
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">sayHello</span><span class="o">(</span><span class="nc">Person</span> <span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> <span class="o">+</span> <span class="n">person</span><span class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>In the pojoHello.bean.xml file of resources/META-INF/spring directory, configure base-package that performs scanning. The content of the file is as follows:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span class="s">"http://www.springframework.org/schema/beans"</span> <span class="na">xmlns:xsi=</span><span class="s">"http://www.w3.org/2001/XMLSchema-instance"</span>
+       <span class="na">xmlns:p=</span><span class="s">"http://www.springframework.org/schema/p"</span> <span class="na">xmlns:util=</span><span class="s">"http://www.springframework.org/schema/util"</span>
+       <span class="na">xmlns:cse=</span><span class="s">"http://www.huawei.com/schema/paas/cse/rpc"</span>
+       <span class="na">xmlns:context=</span><span class="s">"http://www.springframework.org/schema/context"</span>
+       <span class="na">xsi:schemaLocation=</span><span class="s">"http://www.springframework.org/schema/beans classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.huawei.com/schema/paas/cse/rpc classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span class="nt">&gt;</span>
+
+    <span class="nt">&lt;context:component-scan</span> <span class="na">base-package=</span><span class="s">"org.apache.servicecomb.samples.pojo.provider"</span><span class="nt">/&gt;</span>
+<span class="nt">&lt;/beans&gt;</span>
+</code></pre></div>    </div>
+  </li>
+</ol>
+
+<p><strong>Note: THE PATH FOR RPC IS <code class="highlighter-rouge">ClassName/MethodName</code>, AND THE METHOD IS <code class="highlighter-rouge">POST</code>.</strong></p>
+
+<p>In this sample the Path of sayHi is <code class="highlighter-rouge">/HelloImpl/sayHi</code>, and the Path of sayHello is <code class="highlighter-rouge">/HelloImpl/sayHello</code>.</p>
+
+<blockquote>
+  <p><strong>NOTE</strong>：
+Different from the Spring MVC and JAX-RS development modes, the transparent RPC development mode used <code class="highlighter-rouge">@RpcSchema</code> instead of <code class="highlighter-rouge">@RestSchema</code>.</p>
+</blockquote>
+
+<ul>
+  <li>
+    <p><strong>Step 5</strong> Add service definition file:</p>
+
+    <p>Add <a href="https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/definition/service-definition.html">microservice.yaml</a> file into resources folder of your project.</p>
+  </li>
+  <li>
+    <p><strong>Step 6</strong> Add Main class:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Application</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+      <span class="c1">//initializing log, loading bean(including its parameters), and registering service, more detail can be found here : https://docs.servicecomb.io/java-chassis/zh_CN/build-provider/bootup.html</span>
+      <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+      <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
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+    
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+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Distributed Tracing
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#zipkin" id="markdown-toc-zipkin">Zipkin</a></li>
+  <li><a href="#procedure" id="markdown-toc-procedure">Procedure</a>    <ul>
+      <li><a href="#add-dependency" id="markdown-toc-add-dependency">Add dependency</a></li>
+      <li><a href="#configure-tracing-and-data-collection" id="markdown-toc-configure-tracing-and-data-collection">Configure tracing and data collection</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>The microservice architecture addresses many problems of single applications but has several drawbacks, for example, network instability may lead to latency.</p>
+
+<p>In a single application, all the modules are running in the same process without interworking. However, in the microservice architecture, services are communicated through network, and we have to address network problems, such as latency, timeout, and segmentation.</p>
+
+<p>As services expand, we can hardly monitor how data is transferred in the complex service architecture. How do we efficiently monitor network latency and visualize the data flows of services?</p>
+
+<p>The distributed tracing system efficiently monitor network latency of the microservice and visualize data flow during the service.</p>
+
+<h2 id="zipkin">Zipkin</h2>
+
+<blockquote>
+  <p><a href="http://zipkin.io/">Zipkin</a> is a distributed tracing system. It helps gather timing data needed to troubleshoot latency problems in microservice architectures. It manages both the collection and lookup of this data. Zipkin’s design is based on Google <a href="http://research.google.com/pubs/pub36356.html">Dapper paper</a>。</p>
+</blockquote>
+
+<p>ServiceComb integrates the automatic call tracing function provided by Zipkin, so that users can focus on service demands.</p>
+
+<h2 id="procedure">Procedure</h2>
+
+<h3 id="add-dependency">Add dependency</h3>
+
+<p>For microservice based on ServiceComb Java Chassis, add the following content to pom.xml</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>   
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>If the microservice is based on the API of Spring Cloud Zuul, such as the manager service of the workshop demo, add the following dependency:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>    
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="configure-tracing-and-data-collection">Configure tracing and data collection</h3>
+
+<p>Set addresses for the tracing processor and data collection in the microservice.yaml file.</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span> 
+  <span class="na">handler</span><span class="pi">:</span> 
+    <span class="na">chain</span><span class="pi">:</span> 
+      <span class="na">Consumer</span><span class="pi">:</span> 
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-consumer</span>
+      <span class="na">Provider</span><span class="pi">:</span> 
+        <span class="na">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+  <span class="na">tracing</span><span class="pi">:</span> 
+    <span class="na">collector</span><span class="pi">:</span> 
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://zipkin.servicecomb.io:9411</span>
+</code></pre></div></div>
+
+<p>In this way, we enable the Zipkin-and-Java-based chassis distributed tracing system without changing any code.</p>
+
+<p class="notice--warning"><strong>NOTE:</strong> If other dependencies introduce the Zipkin system, such as Spring Cloud, running errors may occur due to version inconsistency. In this case, you need to specify the Zipkin version in the pom project.</p>
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+    
+    <meta itemprop="dateModified" content="January 15, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Dynamic Configuration
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#development-example" id="markdown-toc-development-example">Development Example:</a>    <ul>
+      <li><a href="#deploy-and-start-apollo-configuration-center" id="markdown-toc-deploy-and-start-apollo-configuration-center">Deploy and start Apollo configuration center</a></li>
+      <li><a href="#configure-services-and-get-a-token" id="markdown-toc-configure-services-and-get-a-token">Configure services and get a token</a></li>
+      <li><a href="#add-dependency-in-pomxml" id="markdown-toc-add-dependency-in-pomxml">Add dependency in pom.xml</a></li>
+      <li><a href="#add-configurations-in-microserviceyaml" id="markdown-toc-add-configurations-in-microserviceyaml">Add configurations in microservice.yaml</a></li>
+      <li><a href="#get-configurations" id="markdown-toc-get-configurations">Get configurations</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>Dynamic Configuration makes it possible to update configuration items during the life-cycle of the service without re-deploying it. Users have to deploy services with those configurations in xml or properties file in traditional way and have to redeploy and restart services to update the configurations which could be very difficult to maintain and cost lots time. This problem can be solved by importing configuration center, all configuration items can be stored and maintained by configuration center, services can get latest configuration items through a fixed time period thread without redeploying themselves. Java Chassis supports Apollo configuration center currently and it's easy to extend to other kind of configuration centers by implementing provided interfaces.</p>
+
+<h2 id="development-example">Development Example:</h2>
+
+<h3 id="deploy-and-start-apollo-configuration-center">Deploy and start Apollo configuration center</h3>
+
+<p>Apollo services can be easily deployed and started step by step following its <a href="https://github.com/ctripcorp/apollo/wiki/Apollo-Quick-Start-Docker%E9%83%A8%E7%BD%B2">official document</a>, You can also do that by following command:</p>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   git clone https://github.com/lijasonvip/apollo-image-for-servicecomb.git
+   <span class="nb">cd </span>apollo-image-for-servicecomb <span class="o">&amp;&amp;</span> docker-compose up
+</code></pre></div></div>
+<p>When your console shows <code class="highlighter-rouge">Portal started. You can visit http://localhost:8070 now!</code> , it means the service is started and ready for use(It could take serval minutes which depends on machines). Visit Apollo configuration pages at <code class="highlighter-rouge">http://localhost:8070</code> in a browser. Please refer to <a href="https://docs.docker.com/compose/install/">Docker document</a> about <code class="highlighter-rouge">docker-compose</code>.</p>
+
+<h3 id="configure-services-and-get-a-token">Configure services and get a token</h3>
+
+<ul>
+  <li>
+    <h5 id="login-to-configuration-center-and-create-a-project">Login to Configuration center and create a project</h5>
+
+    <p>Visit the address of Apollo configuration portal service , for example: <code class="highlighter-rouge">http://192.168.199.1:8070</code></p>
+
+    <p><img src="/assets/images/config/login.png" alt="登录配置中心" /></p>
+
+    <p>The default account to login to Apollo configuration center is apollo and admin for username and password respectively.</p>
+  </li>
+  <li>
+    <h5 id="create-a-project">Create a project</h5>
+
+    <p><img src="/assets/images/config/create_project.png" alt="创建项目" /></p>
+
+    <p>There is a demo project named SampleApp, you can create a project for your service by click the green icon <code class="highlighter-rouge">+</code>. The picture below is a example to create a project, fill in your application ID and service name and choose the department and owner of the project and then submit them.</p>
+  </li>
+</ul>
+
+<p><img src="/assets/images/config/create_project2.png" alt="项目信息" /></p>
+
+<p>​	Pay attention that you should release the project when it’s created or client will get nothing of the project. Click the release button as below.</p>
+
+<p><img src="/assets/images/config/release_namespace.png" alt="release_namespace" /></p>
+
+<ul>
+  <li>
+    <h5 id="generate-a-token">Generate a Token</h5>
+  </li>
+</ul>
+
+<p>Visit <code class="highlighter-rouge">http://192.168.199.1:8070/open/manage.html</code> and fill in application ID and service name you just created at last step, then choose department and owner of the project and click the create button to generate a token. The token will be used later in project code.</p>
+
+<p><img src="/assets/images/config/token.png" alt="生成TOKEN" /></p>
+
+<h3 id="add-dependency-in-pomxml">Add dependency in pom.xml</h3>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+          <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+          <span class="nt">&lt;artifactId&gt;</span>config-apollo<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<h3 id="add-configurations-in-microserviceyaml">Add configurations in microservice.yaml</h3>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="na">apollo</span><span class="pi">:</span>
+     <span class="na">config</span><span class="pi">:</span>
+       <span class="na">serverUri</span><span class="pi">:</span> <span class="s">http://127.0.0.1:8070</span>
+       <span class="na">serviceName</span><span class="pi">:</span> <span class="s">SampleApp</span>
+       <span class="na">env</span><span class="pi">:</span> <span class="s">DEV</span>
+       <span class="na">clusters</span><span class="pi">:</span> <span class="s">default</span>
+       <span class="na">namespace</span><span class="pi">:</span> <span class="s">application</span>
+       <span class="na">token</span><span class="pi">:</span> <span class="s">testtoken</span>
+       <span class="na">refreshInterval</span><span class="pi">:</span> <span class="m">10</span>
+</code></pre></div></div>
+<p>​	Configurations under <code class="highlighter-rouge">apollo.config</code> are parameters of the project that users created above, including serviceName, env, clusters, namespace, token and refreshInterval. Pay attention to <code class="highlighter-rouge">refreshInterval: 10</code>, it means service will fetch latest configuration items every each 10 seconds, default refresh cycle is 30 second if no value is configured here. 
+  <code class="highlighter-rouge">serviceName</code> need to be <code class="highlighter-rouge">AppId</code> in apollo, please pay attention to that.</p>
+
+<h3 id="get-configurations">Get configurations</h3>
+
+<p>​	Creating a configuration item named <code class="highlighter-rouge">timeout</code> and set its value to <code class="highlighter-rouge">100</code> then release the configuration with some comments. Example as below:	<img src="/assets/images/config/release_config.png" alt="动态属性timeout" /></p>
+
+<p>​	You can use<code class="highlighter-rouge">DynamicPropertyFactory.getInstance().getProperty()</code> to get the value of configuration items.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   <span class="kd">public</span> <span class="kd">class</span> <span class="nc">Demo</span> <span class="o">{</span>
+      <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+        <span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span>
+        <span class="k">while</span> <span class="o">(</span><span class="kc">true</span><span class="o">)</span> <span class="o">{</span>
+          <span class="nc">DynamicIntProperty</span> <span class="n">timeout</span> <span class="o">=</span> <span class="nc">DynamicPropertyFactory</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span>
+            <span class="n">getIntProperty</span><span class="o">(</span><span class="s">"timeout"</span><span class="o">,</span> <span class="o">-</span><span class="mi">1</span><span class="o">);</span>
+          <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="n">timeout</span><span class="o">);</span>
+          <span class="nc">Thread</span><span class="o">.</span><span class="na">sleep</span><span class="o">(</span><span class="mi">3000</span><span class="o">);</span>
+        <span class="o">}</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+</code></pre></div></div>
+<p>​	When the configuration items are modified and released in Apollo configuration center, the example code above will print latest value of <code class="highlighter-rouge">timeout</code> after a refreshing cycle.</p>
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+    
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+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Java Chassis Edge Service
+</h1>
+            
+          </header>
+        
+      
+
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+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#edge-features" id="markdown-toc-edge-features">Edge Features</a>    <ul>
+      <li><a href="#loose-coupling" id="markdown-toc-loose-coupling">Loose Coupling</a></li>
+      <li><a href="#auto-match-available-version" id="markdown-toc-auto-match-available-version">Auto Match Available Version</a></li>
+      <li><a href="#support-consumer-handler" id="markdown-toc-support-consumer-handler">Support Consumer Handler</a></li>
+      <li><a href="#use-reactive-mode-as-default" id="markdown-toc-use-reactive-mode-as-default">Use Reactive Mode As Default</a></li>
+    </ul>
+  </li>
+  <li><a href="#develop-an-edge-service" id="markdown-toc-develop-an-edge-service">Develop An Edge Service</a>    <ul>
+      <li><a href="#add-dependency" id="markdown-toc-add-dependency">Add Dependency</a></li>
+      <li><a href="#develop-dispatcher" id="markdown-toc-develop-dispatcher">Develop Dispatcher</a></li>
+      <li><a href="#load-dispatcher" id="markdown-toc-load-dispatcher">Load Dispatcher</a></li>
+      <li><a href="#extend-handleroptional" id="markdown-toc-extend-handleroptional">Extend Handler(Optional)</a></li>
+    </ul>
+  </li>
+  <li><a href="#other-reference" id="markdown-toc-other-reference">Other Reference</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>We had provide an edge core module since 1.0.0-m1, please checkout the user guide and <a href="https://github.com/apache/servicecomb-java-chassis/releases">release note</a> for more information.Also subscribe ServiceComb mail-list(dev-subscribe@servicecomb.apache.org) and join discussion is welcome.</p>
+
+<h2 id="edge-features">Edge Features</h2>
+<h3 id="loose-coupling">Loose Coupling</h3>
+<p>Edge Service only redirect requests, no dependencies between services.</p>
+
+<h3 id="auto-match-available-version">Auto Match Available Version</h3>
+<p>Edge Service can auto match available versions, for example:</p>
+<ul>
+  <li>In version 1.0.0 provided Operation1</li>
+  <li>In version 1.1.0 provided both Operation1 and Operation2</li>
+</ul>
+
+<p>If Edge Service redirect the request of Operation1,both instances of version 1.0.0 and instances of version 1.1.0 are allowed, but if Edge Service redirect the request of Operation2, only instances of version 1.1.0 will be selected.</p>
+
+<h3 id="support-consumer-handler">Support Consumer Handler</h3>
+<p>Edge Service support all Java Chassis Consumer Handlers, also support user extend custom handlers.</p>
+
+<h3 id="use-reactive-mode-as-default">Use Reactive Mode As Default</h3>
+<p>Because Edge Service will proxy all requests, so high performance is required, it use reactive mode as default, please do not add any heavy cost(blocking) codes, such as:</p>
+<ul>
+  <li>Database query, remote call etc..</li>
+  <li>Sleep, wait etc..</li>
+  <li>Loop or heavy cost operation etc..</li>
+</ul>
+
+<h2 id="develop-an-edge-service">Develop An Edge Service</h2>
+<h3 id="add-dependency">Add Dependency</h3>
+<p>Only need import edge-core:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+  <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+  <span class="nt">&lt;artifactId&gt;</span>edge-core<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h3 id="develop-dispatcher">Develop Dispatcher</h3>
+<p>For enable Edge Service redirection, we need develop Dispatcher,implement org.apache.servicecomb.transport.rest.vertx.VertxHttpDispatcher interface or extend org.apache.servicecomb.transport.rest.vertx.AbstractVertxHttpDispatcher class:</p>
+
+<h4 id="getorder-method">getOrder Method</h4>
+<p>This value returned will decide the priority of routing rules, the smaller value the higher priority.</p>
+
+<h4 id="init-method">init Method</h4>
+<p>Init routing rules of the Dispatcher, we use <a href="https://vertx.io/docs/vertx-web/java/#_routing_by_exact_path">Vertx Routing Rule</a>, for example we add two routing rules like:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kt">void</span> <span class="nf">init</span><span class="o">(</span><span class="nc">Router</span> <span class="n">router</span><span class="o">)</span> <span class="o">{</span>
+  <span class="nc">String</span> <span class="n">regex</span> <span class="o">=</span> <span class="s">"/([^\\\\/]+)/([^\\\\/]+)/(.*)"</span><span class="o">;</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="nc">CookieHandler</span><span class="o">.</span><span class="na">create</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="n">createBodyHandler</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">failureHandler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onFailure</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onRequest</span><span class="o">);</span>
+
+  <span class="n">regex</span> <span class="o">=</span> <span class="s">"/([^\\\\/]+)/(.*)"</span><span class="o">;</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="nc">CookieHandler</span><span class="o">.</span><span class="na">create</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="n">createBodyHandler</span><span class="o">());</span>
+  <span class="n">router</span><span class="o">.</span><span class="na">routeWithRegex</span><span class="o">(</span><span class="n">regex</span><span class="o">).</span><span class="na">failureHandler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onFailure</span><span class="o">).</span><span class="na">handler</span><span class="o">(</span><span class="k">this</span><span class="o">::</span><span class="n">onRequest</span><span class="o">);</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<ol>
+  <li>/([^\/]+)/([^\/]+)/(.*) : this rule will match certain versions of instance for request, format like /user-service/v0/validate;</li>
+  <li>/([^\/]+)/(.*) : this rule will match any versions of instance for request, format like /user-service/validate.</li>
+</ol>
+
+<h4 id="onrequest-method">onRequest Method</h4>
+<p>Implement of redirection:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kt">void</span> <span class="nf">onRequest</span><span class="o">(</span><span class="nc">RoutingContext</span> <span class="n">context</span><span class="o">)</span>
+</code></pre></div></div>
+
+<p>You can get micro-service name, path etc from context, then create and init a new EdgeInvocation for invoke:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">EdgeInvocation</span> <span class="n">edgeInvocation</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">EdgeInvocation</span><span class="o">();</span>
+<span class="n">edgeInvocation</span><span class="o">.</span><span class="na">setVersionRule</span><span class="o">(</span><span class="n">versionRule</span><span class="o">);</span>
+<span class="n">edgeInvocation</span><span class="o">.</span><span class="na">init</span><span class="o">(</span><span class="n">serviceName</span><span class="o">,</span> <span class="n">context</span><span class="o">,</span> <span class="n">path</span><span class="o">,</span> <span class="n">httpServerFilters</span><span class="o">);</span>
+<span class="n">edgeInvocation</span><span class="o">.</span><span class="na">edgeInvoke</span><span class="o">();</span>
+</code></pre></div></div>
+
+<h3 id="load-dispatcher">Load Dispatcher</h3>
+<p>Edge Service use SPI(Service Provider Interface) to load custom VertxHttpDispatcher, create a folder named META-INF/services under resources folder, then add a file named org.apache.servicecomb.transport.rest.vertx.VertxHttpDispatcher in it, in this file , add full class name of our Dispatcher:</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>{your-package-path}.XXXDispatcher
+</code></pre></div></div>
+
+<h3 id="extend-handleroptional">Extend Handler(Optional)</h3>
+<p>Edge Service always use to provide monitoring, resiliency, security, and more, not only dynamic routing. We recommend extend custom handlers, there is an example named AuthHandler in demo-edge.</p>
+
+<h2 id="other-reference">Other Reference</h2>
+<p>In demo/demo-edge we had provided a simple demo to show abilities of Edge Service:</p>
+<ol>
+  <li>edge-service:Edge Service, include AuthHandler;</li>
+  <li>authentication:Simulate authentication, accept requests from AuthHandler;</li>
+  <li>business-x.x.x:Simulate multi-version business instances;</li>
+  <li>consumer:Simulate UI(user) request,include different version requirement.</li>
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+
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+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Using Confd and Nginx for Edge Service
+</h1>
+            
+          </header>
+        
+      
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+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a>    <ul>
+      <li><a href="#confd" id="markdown-toc-confd"><strong>confd</strong></a></li>
+      <li><a href="#nginx" id="markdown-toc-nginx"><strong>Nginx</strong></a></li>
+    </ul>
+  </li>
+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#interconnecting-with-the-service-center" id="markdown-toc-interconnecting-with-the-service-center">Interconnecting with the Service Center</a>    <ul>
+      <li><a href="#method-1-http-call" id="markdown-toc-method-1-http-call"><strong>Method 1: HTTP call</strong></a></li>
+      <li><a href="#method-2-using-the-open-source-code-api" id="markdown-toc-method-2-using-the-open-source-code-api"><strong>Method 2: Using the open-source code API</strong></a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<h3 id="confd"><strong>confd</strong></h3>
+
+<p>confd is a lightweight configuration management tool. The source code address is: https://github.com/kelseyhightower/confd](https://github.com/kelseyhightower/confd), It can store configuration information in etcd, consul, dynamodb, redis, and zookeeper. confd regularly pulls the latest configuration from storage nodes and then reloads services to complete updating the configuration file.</p>
+
+<h3 id="nginx"><strong>Nginx</strong></h3>
+
+<p>Nginx (engine x) is a high-performance HTTP and  reverse proxy server that has the load balancing function. For details, see <a href="http://www.nginx.cn/doc/">http://www.nginx.cn/doc/</a>. This secton describes the HTTP proxy function of Nginx.</p>
+
+<h2 id="scenario">Scenario</h2>
+
+<p>This section describes how to use Nginx and confd to serve as edge services. Also, you can connect Nginx and confd to service center in the Java Chassis microservice framework and dynamically update configuration of Nginx using confd.</p>
+
+<p>For details about how to use the dynamic reverse proxy of Nginx and confd, see <a href="http://www.cnblogs.com/Anker/p/6112022.html">http://www.cnblogs.com/Anker/p/6112022.html</a>, This section describes how to interconnect Confd with the service center of the Java Chassis framework.</p>
+
+<h2 id="interconnecting-with-the-service-center">Interconnecting with the Service Center</h2>
+
+<p>This section describes how to enable confd to obtain service information from the service center. The service center provides the following APIs for external calls:</p>
+
+<h3 id="method-1-http-call"><strong>Method 1: HTTP call</strong></h3>
+
+<p>The tenant header information of “X-Tenant-Name:tenantName” needs to be added to the HTTP API in the Service Center. tenameName is the tenant name. The default value is default, such as X-Tenant-Name:default.</p>
+
+<ul>
+  <li>
+    <p>Check the health status of the service center</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/health
+</span></code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Obtain all microservice information</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/registry/v3/microservices
+</span></code></pre></div>    </div>
+  </li>
+  <li>
+    <p>Obtain the microservice information with a specified ID</p>
+  </li>
+</ul>
+
+<blockquote>
+  <ol>
+    <li>
+      <p>Obtain the service ID based on the microservice information</p>
+
+      <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err">GET 127.0.0.1:9980/registry/v3/existence?type=microservice&amp;appId={appId}&amp;serviceName={serviceName}&amp;version={version}
+</span></code></pre></div>      </div>
+    </li>
+    <li>
+      <p>Obtain complete microservice information based on the service ID returned by API</p>
+
+      <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err">GET 127.0.0.1:9980/registry/v3/microservices/{serviceId}
+</span></code></pre></div>      </div>
+    </li>
+  </ol>
+</blockquote>
+
+<ul>
+  <li>
+    <p>Obtain all instance information from specified microservice</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/registry/v3/microservices/{serviceId}/instances
+</span></code></pre></div>    </div>
+    <p>Add the following information to the header file:</p>
+
+    <p>“X-ConsumerId:{serviceId}”</p>
+  </li>
+  <li>
+    <p>Searching microservice instance information</p>
+
+    <div class="language-http highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="err"> GET 127.0.0.1:9980/registry/v3/instances?appId={appId}&amp;serviceName={serviceName}&amp;version={version}
+</span></code></pre></div>    </div>
+    <p>Add the following information to the header file:</p>
+
+    <p>“X-ConsumerId:{serviceId}”</p>
+  </li>
+</ul>
+
+<p>NOTE: The preceding service center address is provides as example only. Set the variables enclosed in curly brackets ({}) as needed. The data returned via HTTP is in JSON format.</p>
+
+<h3 id="method-2-using-the-open-source-code-api"><strong>Method 2: Using the open-source code API</strong></h3>
+
+<p>During the development of the microservice application, you only need to call the API provided by the tool RegistryUtil.java in the ServiceComb framework code to obtain the information in the Service Center. The API is described as follows:</p>
+
+<ul>
+  <li>Obtain all microservice information
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">Microservice</span><span class="o">&gt;</span> <span class="nf">getAllMicroservices</span><span class="o">();</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Obtain the unique ID of the microservice.
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">String</span> <span class="nf">getMicroserviceId</span><span class="o">(</span><span class="nc">String</span> <span class="n">appId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">microserviceName</span><span class="o">,</span> <span class="nc">String</span> <span class="n">versionRule</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Query the microservice static information based on the unique ID of the microservice.
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">Microservice</span> <span class="nf">getMicroservice</span><span class="o">(</span><span class="nc">String</span> <span class="n">microserviceId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Query all the microservice instance information based on the unique IDs of the microservices.
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">MicroserviceInstance</span><span class="o">&gt;</span> <span class="nf">getMicroserviceInstance</span><span class="o">(</span><span class="nc">String</span> <span class="n">consumerId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">providerId</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Query the instance end points information based on the application, interface, and version.
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">MicroserviceInstance</span><span class="o">&gt;</span> <span class="nf">findServiceInstance</span><span class="o">(</span><span class="nc">String</span> <span class="n">consumerId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">appId</span><span class="o">,</span> <span class="nc">String</span> <span class="n">serviceName</span><span class="o">,</span><span class="nc">String</span> <span class="n">versionRule</span><span class="o">);</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>You can obtain information about the microservice and instance of the Service Center using the HTTP API to dynamically update the Nginx configuration using confd.</p>
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+    <meta itemprop="headline" content="Using Zuul for Edge Service">
+    <meta itemprop="description" content="Using Zuul for Edge Service">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Using Zuul for Edge Service
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a>    <ul>
+      <li><a href="#api-gateway" id="markdown-toc-api-gateway">API Gateway：</a></li>
+      <li><a href="#zuul" id="markdown-toc-zuul">Zuul</a></li>
+    </ul>
+  </li>
+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#precautions" id="markdown-toc-precautions">Precautions</a></li>
+  <li><a href="#starting-zuul-proxy" id="markdown-toc-starting-zuul-proxy">Starting Zuul Proxy</a></li>
+  <li><a href="#using-zuul-proxy" id="markdown-toc-using-zuul-proxy">Using Zuul Proxy</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<h3 id="api-gateway">API Gateway：</h3>
+
+<p>An API Gateway is a server and the only node through which you can access the system. API Gateway encapsulates the internal system architecture and provides APIs for clients.</p>
+
+<h3 id="zuul">Zuul</h3>
+
+<p>Zuul is a JVM-based router and server load balancer of Netflix. You can use Zuul to perform the following operations:</p>
+
+<ul>
+  <li>Certification</li>
+  <li>Insight</li>
+  <li>Stress test</li>
+  <li>Canary test</li>
+  <li>Dynamic route</li>
+  <li>Service migration</li>
+  <li>Offload</li>
+  <li>Security</li>
+  <li>Static phase response processing</li>
+  <li>Proactive/passive traffic management</li>
+</ul>
+
+<p>This section describes how to use Zuul as the API Gateway in the Spring Boot application. For details about Zuul, see <a href="https://springcloud.cc/spring-cloud-dalston.html#_router_and_filter_zuul">Router and Filter: Zuul</a>.</p>
+
+<h2 id="scenario">Scenario</h2>
+
+<p>Use Zuul as the API Gateway, that is, establishes a Zuul Proxy application. In this proxy application, a unified access of all the microservices is defined, and each microservice is distinguished using a prefix (stipped). This section establishes the ZuulProxy Spring Boot application to demonstrate the API Gateway function.</p>
+
+<h2 id="precautions">Precautions</h2>
+
+<p>In this section, demos, such as ZuulProxy and ZuulServer, are based on Spring Boot and the Java Chassis framework. For detals, see <a href="/users/use-servicecomb-in-spring-boot/">Integrating Spring Boot into Java Chassis</a>.</p>
+
+<h2 id="starting-zuul-proxy">Starting Zuul Proxy</h2>
+
+<p>This topic describes how to start a ZuulProxy application as the API Gateway. Perform the following steps:</p>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Add the following dependency to the POM file.</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-zuul<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-ribbon<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.cloud<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-cloud-starter-hystrix<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span> 
+   <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>  
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span> 
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Add annotations to the main Spring Boot category:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@SpringBootApplication</span>
+ <span class="nd">@EnableServiceComb</span>
+ <span class="nd">@EnableZuulProxy</span><span class="c1">//new Annotation</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">ZuulMain</span><span class="o">{</span>
+ <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span><span class="o">{</span>
+     <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="nc">ZuulMain</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Define a routing policy in the application.yaml file</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">server</span><span class="pi">:</span>
+   <span class="na">port</span><span class="pi">:</span> <span class="m">8754</span> <span class="c1">#api gateway service port number</span>
+ <span class="na">zuul</span><span class="pi">:</span>
+   <span class="na">routes</span><span class="pi">:</span> <span class="c1">#Routing policy</span>
+     <span class="na">discoveryServer</span><span class="pi">:</span> <span class="s">/myServer/**</span> <span class="c1">#Routing rule</span>
+</code></pre></div>    </div>
+
+    <p>The configuration item in ted indicates that the configuration can be performed based on the actual development environment. For details about the rules for defining routing policies of zuul.routers, see：<a href="https://springcloud.cc/spring-cloud-dalston.html#_router_and_filter_zuul">Router and Fillter: Zuul</a> to control routes in a finer granularity.</p>
+  </li>
+  <li>
+    <p><strong>Step 4</strong> Define the microservice attributes in the microservice.yaml fiel.</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">discoverytest</span> <span class="c1">#Service ID</span>
+ <span class="na">service_description</span><span class="pi">:</span>
+   <span class="na">name</span><span class="pi">:</span> <span class="s">discoveryGateway</span> <span class="c1">#Service Name</span>
+   <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.2</span> <span class="c1">#Service Version</span>
+ <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>  <span class="c1">#Service Center registration</span>
+   <span class="na">rest</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8082</span> <span class="c1">#(Optional) microservice port number</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>All the services used in this section use the local service center. For details, see <a href="/users/setup-environment/#运行service-center">Starting the Local Service Center</a>。</p>
+
+<ul>
+  <li><strong>Step 5　</strong> Run ZuulMain Application</li>
+</ul>
+
+<h2 id="using-zuul-proxy">Using Zuul Proxy</h2>
+
+<p>Before using the API Gateway provided by Zuul, start the microservice provider defined in zuul.routers.</p>
+
+<p>Pay attention to the following points in the microservice.yaml file:</p>
+
+<ul>
+  <li>
+    <p>APPLICATION_ID must be the same as that defined in ZuulProxy.</p>
+  </li>
+  <li>
+    <p>The value of service_description.name must be the same as that of zuul.routers</p>
+  </li>
+</ul>
+
+<p>An example is as follows:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">discoverytest</span> <span class="c1">#same as ZuulProxy</span>
+  <span class="na">service_description</span><span class="pi">:</span>
+    <span class="na">name</span><span class="pi">:</span> <span class="s">discoveryServer</span> <span class="c1">#Service name, which corresponds to that of zuul.routers</span>
+    <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.2</span>
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span> <span class="c1">#Service Center registration</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+
+<p>The portal for API Gateway is: <a href="http://127.0.0.1:8754">http://127.0.0.1:8754</a>. All services defined in zuul.routers can be accessed through this portal. The access rule are as follows:</p>
+
+<p>http://127.0.0.1:8754/myServer/***](http://127.0.0.1:8754/myServer/***)</p>
+
+<p>This indicates that HTTP calls [http://127.0.0.1:8754/myServer/*** to switch to the discoveryServer service. For example: “/myServer/101” switches to “/101” of discoveryServer service.</p>
+
+<blockquote>
+  <p>If multiple discoveryServer service (in different versions) exist in the Service Center, Zuul uses the Ribbon policy to transfer the request by default.</p>
+</blockquote>
+
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+
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+            <h1 class="page__title" itemprop="headline">FAQ
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ol>
+  <li>
+    <p><strong>Q: What need to be cautious when using Java-Chassis?</strong></p>
+
+    <p>A: There are a few restrictions when using Java-Chassis:</p>
+    <ul>
+      <li>Before version 0.3.0-SNAPSHOT, it does not support annotations like <code class="highlighter-rouge">@GetMapping</code>.</li>
+      <li>When using the same HTTP request method, e.g. GET, the method name need to be unique as it will become operation ID when swagger generates contracts.</li>
+      <li>Class and method name need to be public.</li>
+    </ul>
+  </li>
+  <li>
+    <p><strong>Q: When using the <em>spring-boot-starter-provider</em> dependency, property like <code class="highlighter-rouge">spring.main.web-environment</code> not working in <em>application.yml</em> file.</strong></p>
+
+    <p>A: When you need both the starter provider dependency and the servlet, you need to declare <code class="highlighter-rouge">spring.main.web-environment</code> in <em>application.properties</em> file or declare it in <em>application.yml</em> file and create an empty <em>application.properties</em> file.</p>
+  </li>
+  <li>
+    <p><strong>Q: What’s the dependency differences between gateway and other microservices?</strong></p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+<span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+</code></pre></div>    </div>
+
+    <p>A: Gateway depends on not only the <code class="highlighter-rouge">spring-boot-starter-provider</code>, but also the <code class="highlighter-rouge">spring-boot-starter-discovery</code>. This can refer to the <em>manger</em> implementation of <a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">LinuxCon-Beijing-Workshop</a>.</p>
+  </li>
+  <li>
+    <p><strong>Q: Do gateway need to configure assembly like the other microservices? Is <em>/maven/gateway</em> the default path of the docker maven plugin?</strong></p>
+
+    <p>A: Yes. Docker maven plugin relies on the assembly files to generate docker image. <em>/maven</em> is the default path of docker maven plugin and <em>/gateway</em> is the path defined in the assembly file.</p>
+  </li>
+  <li>
+    <p><strong>Q: Are there any restrictions of the return type of our API? Should it be the type of ResponseEntity?</strong></p>
+
+    <p>A: No, examples can refer to <a href="https://github.com/apache/servicecomb-java-chassis/blob/master/integration-tests/springmvc-tests/springmvc-tests-common/src/test/java/org/apache/servicecomb/demo/springmvc/tests/SpringMvcIntegrationTestBase.java">the implementation of integration-test</a> in java-chassis.</p>
+  </li>
+  <li>
+    <p><strong>Q: Our API can not be accessed after microservices are up. It just returns <em>404 Not Found</em>. The codes we use is as follows:</strong></p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestController</span>
+<span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"worker"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">WorkerController</span> <span class="o">{</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span><span class="o">=</span><span class="s">"/count"</span><span class="o">,</span> <span class="n">method</span><span class="o">=</span><span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">int</span> <span class="nf">getWorkerNumbers</span><span class="o">()</span> <span class="o">{</span>
+    <span class="o">...</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>A: Without specifying the base path, ServiceComb will use the classname as the base path. Hence, the path should be <code class="highlighter-rouge">/WorkerController/count</code> in the previous code. If you want to access path like <code class="highlighter-rouge">/count</code>, you need to specify base path as <code class="highlighter-rouge">/</code> as follows:</p>
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">WorkerController</span> <span class="o">{}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: What's the default base path if I have not declared the value of RequestMapping annotation?</strong></p>
+
+    <p>A: Supposed the class name of your controller is <em>HelloController</em>, the base path is /HelloController.</p>
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+    
+    <meta itemprop="dateModified" content="December 30, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">HealthCheck
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#introduction" id="markdown-toc-introduction">Introduction</a></li>
+  <li><a href="#how-to-use" id="markdown-toc-how-to-use">How to use</a>    <ul>
+      <li><a href="#implement-custom-healthcheck" id="markdown-toc-implement-custom-healthcheck">Implement custom HealthCheck</a></li>
+      <li><a href="#verify-healthcheck" id="markdown-toc-verify-healthcheck">Verify HealthCheck</a></li>
+    </ul>
+  </li>
+  <li><a href="#other-reference" id="markdown-toc-other-reference">Other Reference</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Java Chassis had support HealthCheck since 1.0.0-m1.</p>
+
+<h2 id="introduction">Introduction</h2>
+<p>Microservice always depend on many middlewares like database, message queue etc. Also depend on other microservices. When microservice is unavailable, may caused by database, we need record details into log file or show details on dashboard: database disk had full? database accress right had invalid? or database accress user and password had changed? not only a DOWN state, details can help dev ops find where is the problem and solve it faster.</p>
+
+<p>HealthCheck provide an extensible mechanism, user can create custom check point in order to probe whether the core dependencies are available, if any one is unavailable, report the details:</p>
+
+<p><img src="/assets/images/HealthCheck.png" alt="HealthCheck" /></p>
+
+<h2 id="how-to-use">How to use</h2>
+<h3 id="implement-custom-healthcheck">Implement custom HealthCheck</h3>
+<p>It is easy to implement Java Chassis HealthCheck, implements from <code class="highlighter-rouge">org.apache.servicecomb.foundation.metrics.health.HealthChecker</code> interface and override these methods:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Method Name</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">getName</td>
+      <td style="text-align: left">Return the name of HealthChecker, please make sure do not duplicated, otherwise the results of same name will merged</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">check</td>
+      <td style="text-align: left">Concrete implementation of Check logic</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>Example:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">MySqlHealthChecker</span> <span class="kd">implements</span> <span class="nc">HealthChecker</span> <span class="o">{</span>
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">String</span> <span class="nf">getName</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="s">"mysql"</span><span class="o">;</span>
+  <span class="o">}</span>
+
+  <span class="nd">@Override</span>
+  <span class="kd">public</span> <span class="nc">HealthCheckResult</span> <span class="nf">check</span><span class="o">()</span> <span class="o">{</span>
+    <span class="c1">//add your health check code here</span>
+    <span class="nc">Connection</span> <span class="n">connection</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span>
+    <span class="k">try</span> <span class="o">{</span>
+      <span class="n">connection</span> <span class="o">=</span> <span class="nc">DriverManager</span><span class="o">.</span><span class="na">getConnection</span><span class="o">(</span><span class="s">"jdbc:mysql://localhost:3306/test_db?useSSL=false"</span><span class="o">,</span> <span class="s">"root"</span><span class="o">,</span> <span class="s">"pwd"</span><span class="o">);</span>
+      <span class="k">return</span> <span class="k">new</span> <span class="nf">HealthCheckResult</span><span class="o">(</span><span class="kc">true</span><span class="o">,</span> <span class="s">"local mysql health check"</span><span class="o">,</span> <span class="s">""</span><span class="o">);</span>
+    <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">SQLException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span>
+      <span class="no">LOG</span><span class="o">.</span><span class="na">error</span><span class="o">(</span><span class="s">"Cannot connect the localhost mysql. "</span><span class="o">,</span> <span class="n">e</span><span class="o">);</span>
+      <span class="k">return</span> <span class="k">new</span> <span class="nf">HealthCheckResult</span><span class="o">(</span><span class="kc">false</span><span class="o">,</span> <span class="s">"local mysql health check"</span><span class="o">,</span> <span class="n">e</span><span class="o">.</span><span class="na">toString</span><span class="o">());</span>
+    <span class="o">}</span> <span class="k">finally</span> <span class="o">{</span>
+      <span class="k">if</span> <span class="o">(</span><span class="n">connection</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
+        <span class="k">try</span> <span class="o">{</span>
+          <span class="n">connection</span><span class="o">.</span><span class="na">close</span><span class="o">();</span>
+        <span class="o">}</span> <span class="k">catch</span> <span class="o">(</span><span class="nc">SQLException</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span>
+          <span class="no">LOG</span><span class="o">.</span><span class="na">error</span><span class="o">(</span><span class="s">"Close connect the localhost mysql error. "</span><span class="o">,</span> <span class="n">e</span><span class="o">);</span>
+        <span class="o">}</span>
+      <span class="o">}</span>
+    <span class="o">}</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>We use SPI to load it, create an new file named <code class="highlighter-rouge">org.apache.servicecomb.foundation.metrics.health.HealthChecker</code> under <code class="highlighter-rouge">esource/META-INF/services</code> folder, write class name of your HealthChecker into it, like:</p>
+
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>org.apache.servicecomb.samples.metrics.extendhealthcheck.MySqlHealthChecker
+</code></pre></div></div>
+
+<h3 id="verify-healthcheck">Verify HealthCheck</h3>
+<p>After microservice startup, HealthCheck will publish use Rest endpoint, the publish address is same as <code class="highlighter-rouge">servicecomb.rest.address</code>, if had configure in <code class="highlighter-rouge">microservice.yaml</code> like:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+
+<p>We can get HealthCheck final result by accress http://localhost:8080/health , also can get detail results by accress http://localhost:8080/health/detail .</p>
+
+<blockquote>
+  <p>NOTE:</p>
+  <ol>
+    <li>The implementation of Rest publish is in metrics-core, so need import this dependency;</li>
+    <li>The result of /health is the final result of all HealthCheckers, true or false, if healthy result of any HealthChecker return false, then this value will false.</li>
+  </ol>
+</blockquote>
+
+<h2 id="other-reference">Other Reference</h2>
+<p>We had provided a sample at samples/metrics-extend-healthcheck.</p>
+
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+      </section>
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+
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+      
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+            <h1 class="page__title" itemprop="headline">Huawei Cloud FAQ
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ol>
+  <li>
+    <p><strong>Q: When we push images to Huawei Public Cloud, what needs to be careful about the image tag?</strong></p>
+
+    <p>A:  It needs to be different with all uploaded images. As Docker does not pull image from remote every time it starts up a container. Hence, the Docker does not know whether the image updated or not. There are two solutions for this:</p>
+
+    <p>(1) Use different image tag every time you upload a image.</p>
+
+    <p>(2) Delete the image in the backend manually.</p>
+
+    <p>P.S. If you use the Huawei Cloud’s orchestration, you can avoid this by setting <em>imagePullPolicy</em> to <em>Always</em>.</p>
+  </li>
+  <li>
+    <p><strong>Q: We encountered this error when using Huawei Public Cloud: <em>WARN com.huaewi.paas.monitor.DataFactory: Upload monitor data error.</em> The configuration we use is as follows:</strong></p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">monitor</span><span class="pi">:</span>
+    <span class="na">handler</span><span class="pi">:</span>
+      <span class="na">chain</span><span class="pi">:</span>
+        <span class="na">Provider</span><span class="pi">:</span>
+          <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+</code></pre></div>    </div>
+
+    <p>A: There are mistakes in your configuration files. <code class="highlighter-rouge">handler</code> should be the child of <code class="highlighter-rouge">servicecomb</code> instead of <code class="highlighter-rouge">monitor</code>. The right configuration should be as follows:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
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content/docs/users/index.html

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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
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+  <li><a href="#basic-framework" id="markdown-toc-basic-framework">Basic Framework</a></li>
+  <li><a href="#purpose" id="markdown-toc-purpose">Purpose</a></li>
+  <li><a href="#modules" id="markdown-toc-modules">Modules</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="basic-framework">Basic Framework</h2>
+<p><img src="/assets/images/servicecomb_mode_en.png" alt="ServiceComb Model" class="align-center" /></p>
+
+<h2 id="purpose">Purpose</h2>
+
+<p>1.To decouple the programming and communication models, so that a programming model can be combined with any communication models as needed. Application developers only need to focus on APIs during development and can flexibly switch communication models during deployment. Services can also be switched over to a legacy system. The developers simply need to modify the configuration file(or annotation) released by the service.</p>
+
+<p>Currently, applications can be developed in Spring MVC, JAX-RS, or transparent RPC mode.</p>
+
+<p>2.To introduce the code-first approach. This allows cross-language communication through API definition-based microservice development and supports the development of software tool chains(such as code generated based on API definitions and API definitions generated based on code) to build a complete development ecosystem.</p>
+
+<p>3.To define common microservice running model, encapsulating fault tolerance methods of microservices used from discovery to interaction, The running model can be customized or extended.</p>
+
+<h2 id="modules">Modules</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Type</th>
+      <th style="text-align: left">artifact id</th>
+      <th style="text-align: left">Available or NOT</th>
+      <th style="text-align: left">Function</th>
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+      <td style="text-align: left">provider-pojo</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Provides the RPC development mode.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Programming model</td>
+      <td style="text-align: left">provider-jaxrs</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Provides the JAX-RS development mode.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Programming model</td>
+      <td style="text-align: left">provider-springmvc</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Provides the Spring MVC development mode.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Communication on model</td>
+      <td style="text-align: left">transport-rest-vertx</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">A development framework running over HTTP, it does not depend on Web containers. Applications are packaged as executable .jar files.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Communication on model</td>
+      <td style="text-align: left">transport-rest-servlet</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">A development framework running on Web container. Applications are packaged as WAR files.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Communication on model</td>
+      <td style="text-align: left">transport-highway</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Provides high-performance private communication protocols for Java communication.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Running model</td>
+      <td style="text-align: left">handler-loadbalance</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">A load balancing module that provides various routing policies and configurations. It is usually used for clients.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Running model</td>
+      <td style="text-align: left">handler-bizkeeper</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Provides service governance functions, such as isolation, fallbreak, and fault tolerance.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">Running model</td>
+      <td style="text-align: left">handler-tracing</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Provides the capability of developing and managing TCC transactions.</td>
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content/docs/users/invoke-control/index.html

diff --git a/content/docs/users/invoke-control/index.html b/content/docs/users/invoke-control/index.html
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+            <li><a href="https://docs.servicecomb.io/java-chassis/en_US/index.html" class="">1.2.1</a></li>
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+    <meta itemprop="headline" content="Invoke Control">
+    <meta itemprop="description" content="Invoke Control">
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+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Invoke Control
+</h1>
+            
+          </header>
+        
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+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#instance-level-fault-isolation" id="markdown-toc-instance-level-fault-isolation">Instance-Level Fault Isolation</a>    <ul>
+      <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+      <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a></li>
+    </ul>
+  </li>
+  <li><a href="#circuit-break-policy" id="markdown-toc-circuit-break-policy">Circuit Break Policy</a>    <ul>
+      <li><a href="#scenario-1" id="markdown-toc-scenario-1">Scenario</a></li>
+      <li><a href="#configuration-1" id="markdown-toc-configuration-1">Configuration</a></li>
+    </ul>
+  </li>
+  <li><a href="#flow-control-policy" id="markdown-toc-flow-control-policy">Flow Control Policy</a>    <ul>
+      <li><a href="#scenario-2" id="markdown-toc-scenario-2">Scenario</a></li>
+      <li><a href="#precaution" id="markdown-toc-precaution">Precaution</a></li>
+      <li><a href="#configuration-2" id="markdown-toc-configuration-2">Configuration</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="instance-level-fault-isolation">Instance-Level Fault Isolation</h2>
+
+<h3 id="scenario">Scenario</h3>
+
+<p>In the scenario where some instances fail to be called, the instance-level fault isolation function stops the ServiceComb framework from sending requests to the faulty instance.</p>
+
+<h3 id="configuration">Configuration</h3>
+
+<p>This instance-level fault isolation function is integrated into the load balancing function. For configuration of the load balancing policy, see  <a href="/users/service-configurations/#负载均衡策略">Service Configurations</a>. For parameters associated with instance-level fault isolation in the load balancing policy, see table below:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remark</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.enabled</td>
+      <td style="text-align: left">false</td>
+      <td style="text-align: left">Boolean</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether to enable faulty instance isolation.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.enableRequestThreshold</td>
+      <td style="text-align: left">20</td>
+      <td style="text-align: left">Integer</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the threshold number of instance calls. If this value is reached, isolation is enabled.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.errorThresholdPercentage</td>
+      <td style="text-align: left">20</td>
+      <td style="text-align: left">Integer, (0,100]</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the error percentage. Instance fault isolation is enabled when the set value is reached.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.loadbalance.isolation.singleTestTime</td>
+      <td style="text-align: left">10000</td>
+      <td style="text-align: left">Integer</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the duration of a faulty instance test on a single node.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="circuit-break-policy">Circuit Break Policy</h2>
+<h3 id="scenario-1">Scenario</h3>
+
+<p>Circuit brake policy can configure ServiceComb fallback capability, you can configure conditions under which service will stop send request after circuit break policy configured.</p>
+
+<h3 id="configuration-1">Configuration</h3>
+
+<p>Circuit break is part of fallback policy when a service request is abnormal, relevant concept such as isolation and fault tolerance please refer to <a href="/users/service-configurations/#降级策略">fallback policy</a>。</p>
+
+<h2 id="flow-control-policy">Flow Control Policy</h2>
+<h3 id="scenario-2">Scenario</h3>
+
+<p>You can limit the frequency of request send to specific microservice when flow control was enables in consumer service.</p>
+
+<h3 id="precaution">Precaution</h3>
+
+<p>See detail info at <a href="/users/service-configurations/#限流策略">Service Configurations</a>。</p>
+
+<h3 id="configuration-2">Configuration</h3>
+
+<p>Flow control policy configuration is in microservice.yaml file. You need to configure consumer handler in chain of service. See example blow:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-consumer</span>
+</code></pre></div></div>
+
+<p>Configuration items of QPS:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remark</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Consumer.qps.enabled</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">Boolean</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether consumers flowcontrol enables.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Consumer.qps.limit.[ServiceName].[Schema].[operation]</td>
+      <td style="text-align: left">2147483647  (max int)</td>
+      <td style="text-align: left">(0,2147483647], Integer</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies number of requests per second.</td>
+      <td style="text-align: left">Support three level configurations: microservice、schema、operation.</td>
+    </tr>
+  </tbody>
+</table>
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
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+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#starting-local-servicecenter" id="markdown-toc-starting-local-servicecenter">Starting Local ServiceCenter</a></li>
+  <li><a href="#enable-local-servicecenter-using-the-mock-mechanism" id="markdown-toc-enable-local-servicecenter-using-the-mock-mechanism">Enable Local ServiceCenter Using the Mock Mechanism</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>This section describes how developers can locally develop and commission consumer and provider applications. Both service providers and consumers need to connect to the remote service center. Two methods of building Local  ServiceCenter for local microservice commissioning are as follows:</p>
+
+<ul>
+  <li>
+    <p>Starting <a href="#启动本地服务中心">Local Service Center</a>。</p>
+  </li>
+  <li>
+    <p>Starting Local Service Center <a href="#mock机制启动服务中心">Mock mechanism</a>。</p>
+  </li>
+</ul>
+
+<p>Service center is an important component in the microservice architecture, and is used for managing, registering, and detecting metadata and instance metadata. The logic relationship between the service center and microservice provider/consumer is as follows:</p>
+
+<p><img src="/assets/images/local_develop_test_en.png" alt="" /></p>
+
+<h2 id="starting-local-servicecenter">Starting Local ServiceCenter</h2>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Starting local service center,  please refer to <a href="/users/setup-environment/#运行service-center">Setup Environment</a>,</p>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> After local service center is started, configure the service center address in the microservice.yaml file that stores SDK configuration information, as shown in the following example:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span> <span class="c1">#Indicates the service center address and port number</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Develop service providers and consumers enable the microservice for local tests.</p>
+  </li>
+</ul>
+
+<h2 id="enable-local-servicecenter-using-the-mock-mechanism">Enable Local ServiceCenter Using the Mock Mechanism</h2>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Create the registry.yaml file for Local ServiceCenter</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">springmvctest</span><span class="pi">:</span>
+   <span class="pi">-</span> <span class="na">id</span><span class="pi">:</span> <span class="s2">"</span><span class="s">001"</span>
+     <span class="na">version</span><span class="pi">:</span> <span class="s2">"</span><span class="s">1.0"</span>
+     <span class="na">appid</span><span class="pi">:</span> <span class="s">myapp</span> <span class="c1">#Commissioning service ID</span>
+     <span class="na">instances</span><span class="pi">:</span> 
+       <span class="na">endpoints</span><span class="pi">:</span>
+         <span class="s">rest://127.0.0.1:8080</span>
+</code></pre></div>    </div>
+
+    <p>NOTE: The mock mechanism needs an API definition on its own. Currently, only local commissioning for service consumers is supported.</p>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Add the following code to the end of the Main function for service consumers.</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">class</span> <span class="nc">xxxClient</span> <span class="o">{</span>
+ <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+   <span class="nc">System</span><span class="o">.</span><span class="na">setProperty</span><span class="o">(</span><span class="s">"local.registry.file"</span><span class="o">,</span> <span class="s">"/path/registry.yaml"</span><span class="o">);</span>
+   <span class="c1">//your code</span>
+   <span class="nc">System</span><span class="o">.</span><span class="na">clearProperty</span><span class="o">(</span><span class="s">"local.registry.file"</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>NOTE: Set the second parameter of setProperty to the absolute path of registry.yaml file in the disk. The path separator depends on the system it is in.</p>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Develop service consumers and enable the microservice for local tests.</p>
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content/docs/users/manage_springcloud_application_using_sc_and_gs/index.html

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+    <meta itemprop="headline" content="Using the Service Center and Governance Center to Manage the Spring Cloud Application">
+    <meta itemprop="description" content="Using the Service Center and Governance Center to Manage the Spring Cloud Application">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Using the Service Center and Governance Center to Manage the Spring Cloud Application
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#configuration-description" id="markdown-toc-configuration-description">Configuration Description</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>This section describes how to change configurations in the native Spring Cloud application to allow the Spring Cloud application to use the service center and governance center in the microservice framework.</p>
+
+<h2 id="scenario">Scenario</h2>
+
+<ul>
+  <li>
+    <p>The Spring Cloud Eureka client provides the service discovery and service registration function in the distributed environment by default.</p>
+
+    <p><img src="/assets/images/manage_springcloud_application_using_sc_and_gs.png" alt="" /></p>
+  </li>
+  <li>
+    <p>The service center in microservice framework is used to manage and process registration and discovery of service metadata and service instance metadata, and also supports the following functions:</p>
+  </li>
+</ul>
+
+<blockquote>
+  <ul>
+    <li>
+      <p>The pull and push modes used to monitor instance changes</p>
+    </li>
+    <li>
+      <p>Dynamic instance scale-out, massive persistent connections, or short connections.</p>
+    </li>
+    <li>
+      <p>Advanced management features, such as gray release and sersvice grouping.</p>
+    </li>
+  </ul>
+</blockquote>
+
+<p>You can use Spring Cloud or Spring Boot to develop applications, enable services run in the microservice SDK container, and use functions, such as high-performance communication, service governance, and distributed transaction management.</p>
+
+<h2 id="configuration-description">Configuration Description</h2>
+
+<p>Use Spring Boot or Spring Cloud to develop applications and perform the following steps based on the original application to interconnect with the SDK components of ServiceComb.</p>
+
+<p>NOTE， If your java chassis version is or below 0.5.0, please use the io.servicecomb as the groupId.</p>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong> Add dependencyManagement to teh POM file:</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependencyManagement&gt;</span>
+   <span class="nt">&lt;dependencies&gt;</span>
+     <span class="nt">&lt;dependency&gt;</span>
+       <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+       <span class="nt">&lt;artifactId&gt;</span>java-chassis-dependencies<span class="nt">&lt;/artifactId&gt;</span>
+       <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+       <span class="nt">&lt;type&gt;</span>pom<span class="nt">&lt;/type&gt;</span>
+       <span class="nt">&lt;scope&gt;</span>import<span class="nt">&lt;/scope&gt;</span>
+     <span class="nt">&lt;/dependency&gt;</span>
+   <span class="nt">&lt;/dependencies&gt;</span>
+ <span class="nt">&lt;/dependencyManagement&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Add the following dependency to POM file.</p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nt">&lt;dependency&gt;</span>
+   <span class="c">&lt;!--let services run in the microservice SDK container.--&gt;</span>
+   <span class="nt">&lt;group&gt;</span>org.apache.servicecomb<span class="nt">&lt;/group&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span>
+   <span class="c">&lt;!--Use Service Center.--&gt;</span>
+   <span class="nt">&lt;group&gt;</span>org.apache.servicecomb<span class="nt">&lt;/group&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-discovery<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span>
+   <span class="c">&lt;!--Let Servieces run in Spring boot embedded tomcat--&gt;</span>
+   <span class="nt">&lt;group&gt;</span>org.apache.servicecomb<span class="nt">&lt;/group&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-transport<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+ <span class="nt">&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-web<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;&lt;dependency&gt;</span>
+   <span class="nt">&lt;groupId&gt;</span>org.springframework.boot<span class="nt">&lt;/groupId&gt;</span>
+   <span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-actuator<span class="nt">&lt;/artifactId&gt;</span>
+ <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 3</strong> Configure the processing chain and protocol:</p>
+
+    <p>Create the microservice.yaml file in the resources directory and define the service. For details, see Service Definition. For example:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">discoverytest</span>
+ <span class="na">service_description</span><span class="pi">:</span>
+   <span class="na">name</span><span class="pi">:</span> <span class="s">discoveryServer</span>
+   <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.2</span>
+ <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span>  <span class="s">http://127.0.0.1:30100</span> <span class="c1">#Service Center registration</span>
+   <span class="err"> </span><span class="na">rest</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span> <span class="c1">#Port number released by the service</span>
+    <span class="na">handler</span><span class="pi">:</span>
+      <span class="na">chain</span><span class="pi">:</span>
+        <span class="na">Provider</span><span class="pi">:</span>
+          <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span> <span class="c1">#Call processing chain</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 4</strong> To use the ServiceComb configuration center, run the following commands</p>
+
+    <p>Add the following dependency to POM file:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="o">&lt;</span><span class="n">dependency</span><span class="o">&gt;</span>
+   <span class="o">&lt;!--</span><span class="nc">Use</span> <span class="n">the</span> <span class="n">configuration</span> <span class="n">center</span><span class="o">--&gt;</span>
+   <span class="o">&lt;</span><span class="n">group</span><span class="o">&gt;</span><span class="n">org</span><span class="o">.</span><span class="na">apache</span><span class="o">.</span><span class="na">servicecomb</span><span class="o">&lt;/</span><span class="n">group</span><span class="o">&gt;</span>
+   <span class="o">&lt;</span><span class="n">artifactId</span><span class="o">&gt;</span><span class="n">spring</span><span class="o">-</span><span class="n">boot</span><span class="o">-</span><span class="n">starter</span><span class="o">-</span><span class="n">discovery</span><span class="o">&lt;/</span><span class="n">artifactId</span><span class="o">&gt;</span>
+ <span class="o">&lt;/</span><span class="n">dependency</span><span class="o">&gt;</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 5</strong> Add the annotation @EnableServiceComb to the main class:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="nd">@EnableDiscoveryClient</span>
+ <span class="nd">@SpringBootApplication</span>
+ <span class="nd">@EnableServiceComb</span> <span class="c1">//new annotation</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">xxxServer</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
+     <span class="nc">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="n">xxxServer</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 6</strong> Define the API definition. For details ,see <a href="/users/service-contract/">Service Contract</a>:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="c1">// ControllerImpl.class:</span>
+ <span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"test"</span><span class="o">)</span>
+ <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/compute"</span><span class="o">,</span> <span class="n">produces</span> <span class="o">=</span> <span class="nc">MediaType</span><span class="o">.</span><span class="na">TEXT_PLAIN</span><span class="o">)</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">ControllerImpl</span> <span class="o">{</span>
+   <span class="nd">@ResponseBody</span>
+   <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/hello/{name}"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+   <span class="kd">public</span> <span class="nc">String</span> <span class="nf">add</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"hello"</span> <span class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 7</strong> Start the xxxServer. The service can be registered in the service center of ServiceComb.</p>
+  </li>
+</ul>
+
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content/docs/users/metrics-in-1.0.0-m1/index.html

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+    <meta itemprop="headline" content="Metrics in 1.0.0-m1">
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+    
+    <meta itemprop="dateModified" content="December 30, 2017">
+
+    <div class="page__inner-wrap">
+      
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+          <header>
+            <h1 class="page__title" itemprop="headline">Metrics in 1.0.0-m1
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#background" id="markdown-toc-background">Background</a></li>
+  <li><a href="#1000-m1-principles" id="markdown-toc-1000-m1-principles">1.0.00-m1 Principles</a>    <ul>
+      <li><a href="#use-event-collect-invocation-datanot-from-hystrixhandler-bizkeeperany-more" id="markdown-toc-use-event-collect-invocation-datanot-from-hystrixhandler-bizkeeperany-more">Use event collect invocation data,not from Hystrix(handler-bizkeeper)any more</a></li>
+      <li><a href="#use-netflix-servo-as-monitor-of-metric" id="markdown-toc-use-netflix-servo-as-monitor-of-metric">Use Netflix Servo as Monitor of Metric</a></li>
+      <li><a href="#window-timealso-may-called-polling-interval-or-step-cycle" id="markdown-toc-window-timealso-may-called-polling-interval-or-step-cycle">Window Time(also may called ‘Polling Interval’ or ‘Step Cycle’)</a></li>
+    </ul>
+  </li>
+  <li><a href="#metrics-id-format" id="markdown-toc-metrics-id-format">Metrics ID Format</a>    <ul>
+      <li><a href="#jvm-information" id="markdown-toc-jvm-information">JVM Information</a></li>
+      <li><a href="#invocation-information" id="markdown-toc-invocation-information">Invocation Information</a></li>
+    </ul>
+  </li>
+  <li><a href="#how-to-configuration" id="markdown-toc-how-to-configuration">How to Configuration</a>    <ul>
+      <li><a href="#global-configuration" id="markdown-toc-global-configuration">Global Configuration</a></li>
+      <li><a href="#maven-configuration" id="markdown-toc-maven-configuration">Maven Configuration</a></li>
+    </ul>
+  </li>
+  <li><a href="#how-to-get-metrics-data" id="markdown-toc-how-to-get-metrics-data">How to Get Metrics Data</a>    <ul>
+      <li><a href="#embedded-publish-interface" id="markdown-toc-embedded-publish-interface">Embedded publish interface</a></li>
+      <li><a href="#direct-programming-get" id="markdown-toc-direct-programming-get">Direct programming get</a></li>
+    </ul>
+  </li>
+  <li><a href="#how-to-use-metrics-data" id="markdown-toc-how-to-use-metrics-data">How to Use Metrics Data</a></li>
+  <li><a href="#how-to-extend-custom-metrics" id="markdown-toc-how-to-extend-custom-metrics">How to Extend Custom Metrics</a></li>
+  <li><a href="#other-reference" id="markdown-toc-other-reference">Other Reference</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Metrics had supported from Java chassis version 0.5.0,in version 1.0.0-m1,we had reconstruction it and add some more features,please checkout the user guide and <a href="https://github.com/apache/servicecomb-java-chassis/releases">release note</a> for more information.Also subscribe ServiceComb mail-list(dev-subscribe@servicecomb.apache.org) and join discussion is welcome.</p>
+
+<h2 id="background">Background</h2>
+<p>Microservice is trend of technology,it resolve many problems also follows new problem.</p>
+
+<p><img src="/assets/images/MonolithicArch.png" alt="MonolithicArch" /></p>
+
+<p>This is traditional software architecture always called ‘Monolithic’,it’s difficult for developer maintain the code or add new feature because of tight coupling,but it’s easy for operation engineer deploy and maintenance(only one system process).</p>
+
+<p><img src="/assets/images/MicroserviceArch.png" alt="MicroserviceArch" /></p>
+
+<p>This is microservice system architecture,after split ‘Monolithic’ into many small services,developer obtain many benefits such as architecture independent and more agility etc,but operation engineer need to maintenance a whole lot of microservice instances.If don’t import metrics,when system  is abnormal or user experience getting worse,it’s very difficult to dentifying where the problem is and make some strategy in order to prevent it.</p>
+
+<h2 id="1000-m1-principles">1.0.00-m1 Principles</h2>
+<p>In previous version(0.5.0)，implementation of metrics had some imperfections:</p>
+<ol>
+  <li>Metrics code written in foundation-metrics module,it’s a low level module,and include some customized function;</li>
+  <li>Use ThreadLocal variable collect and statistics data,performance hight but has memory leak risk;</li>
+  <li>Output data of metrics is joined text not dependent number,difficult to reuse;</li>
+  <li>Not support publish,unable integration with other monitor system;</li>
+  <li>Because foundation-metrics is a low level module and certainly be loaded,user can’t exclude it if unnecessary.</li>
+</ol>
+
+<p>So,upgrading from 0.5.0 to 1.0.0-m1,we had done a fully reconstruction,now it’s include this modules:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Module Name</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">foundation-metrics</td>
+      <td style="text-align: left">Metrics mechanism module</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">metrics-core</td>
+      <td style="text-align: left">Metrics core module,work immediately after imported</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">metrics-integration</td>
+      <td style="text-align: left">Include metrics Integration with other monitor system</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>The dependency of this modules is:</p>
+
+<p><img src="/assets/images/MetricsDependency.png" alt="MetricsDependency.png" /></p>
+
+<h3 id="use-event-collect-invocation-datanot-from-hystrixhandler-bizkeeperany-more">Use event collect invocation data,not from Hystrix(handler-bizkeeper)any more</h3>
+<p>From 1.0.0-m1 invocation data such as TPS and latency are collected from invocation event,not from Hystrix（handler-bizkeeper） any more,so you don’t need add Java Chassis Bizkeeper Handler only for metrics.we use EventBus in foundation-common,when EventBus had initialized,three build-in event listener class will be auto registered via SPI(Service Provider Interface):</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Event Listener Name</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">InvocationStartedEventListener</td>
+      <td style="text-align: left">Process InvocationStartedEvent when consumer or producer called</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">InvocationStartExecutionEventListener</td>
+      <td style="text-align: left">Process InvocationStartExecutionEvent when producer fetch invocation from queue and start process</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">InvocationFinishedEventListener</td>
+      <td style="text-align: left">Process InvocationFinishedEvent when consumer call returned or producer process finished</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><em>ServiceComb java chassis had used <a href="http://vertx.io/">Vertx</a> as Reactor framework,in synchronous call mode when producer received invocation from consumer,it won’t start process immediately but put it into a queue,this queue called invocation queue(like disk queue in operation system),time waiting in the queue called <strong>LifeTimeInQueue</strong>,the length of the queue called <strong>waitInQueue</strong>,this two metrics are very important for measure stress of the microservice;consumer not has this queue,so InvocationStartProcessingEvent will never be triggered at consumer side.</em></p>
+
+<p>The code for trigger event write in RestInvocation,HighwayServerInvoke and InvokerUtils,if microservice don’t import metrics,event listeners of metrics won’t be registered,the impact on performance is little.</p>
+
+<h3 id="use-netflix-servo-as-monitor-of-metric">Use Netflix Servo as Monitor of Metric</h3>
+<p><a href="https://github.com/Netflix/servo">Netflix Servo</a> had implement a collection of high performance monitor,we had used five of them:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Monitor Name</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">BasicCounter</td>
+      <td style="text-align: left">As name of it,always increment</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">StepCounter</td>
+      <td style="text-align: left">Called ‘ResettableCounter’ before</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">BasicTimer</td>
+      <td style="text-align: left">Time (Latency) monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">BasicGauge</td>
+      <td style="text-align: left">Return a Callable call result monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">MaxGauge</td>
+      <td style="text-align: left">Mark max value in step</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><em>The version of Servo we used is 0.10.1</em></p>
+
+<h3 id="window-timealso-may-called-polling-interval-or-step-cycle">Window Time(also may called ‘Polling Interval’ or ‘Step Cycle’)</h3>
+<p>Metrics had many classifications,we can divided them into two major types by how get value:</p>
+<ol>
+  <li>Direct get<br />
+  You can direct get newest value anytime,such as system resource usage include cpu load rate,running thread count,heap size and call count,queue length,etc.</li>
+  <li>From statistics<br />
+  After a ‘certain time’ passed can counting the value,this time we called ‘Window Time’,include:<br />
+  a) Take one from many,like Max、Min、Median; <br />
+  b) Time-related,like TPS(transaction per second);  <br />
+  c) Count-related,like average,variance.  <br />
+  If get value of this type,the result returned is the last ‘Step Cycle’ counted.in Servo,this time called <a href="https://github.com/Netflix/servo/wiki/Getting-Started">‘Polling Intervals’</a>.
+  From 1.0.0-m1,can set <strong>servicecomb.metrics.window_time</strong> in microservice.yaml,it has same effect as set <strong>servo.pollers</strong>.</li>
+</ol>
+
+<p><strong>Notice: Servo had marked with DEPRECATED by Netflix, we will use Netflix spectator instead in 1.0.0-m2, no need to set the window_time any more</strong></p>
+
+<h2 id="metrics-id-format">Metrics ID Format</h2>
+<p>From 1.0.0-m1,build-in two type Metric output:</p>
+<h3 id="jvm-information">JVM Information</h3>
+<p>ID format is : <em>jvm(statistic=gauge,name={name})</em>
+name include:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Name</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">cpuLoad</td>
+      <td style="text-align: left">CPU load rate</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">cpuRunningThreads</td>
+      <td style="text-align: left">Running thread count</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">heapInit,heapMax,heapCommit,heapUsed</td>
+      <td style="text-align: left">Memory heap usage</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">nonHeapInit,nonHeapMax,nonHeapCommit,nonHeapUsed</td>
+      <td style="text-align: left">Memory nonHeap usage</td>
+    </tr>
+  </tbody>
+</table>
+
+<h3 id="invocation-information">Invocation Information</h3>
+<p>ID format is : <em>servicecomb.invocation(operation={operationName},role={role},stage={stage},statistic={statistic},status={status},unit={unit})</em>
+Tag name and value below:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Tag Name</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Options or Values</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">operationName</td>
+      <td style="text-align: left">Operation full name</td>
+      <td style="text-align: left">MicroserviceQualifiedName</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">role</td>
+      <td style="text-align: left">Consumer side or Producer side</td>
+      <td style="text-align: left">consume,producer</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">stage</td>
+      <td style="text-align: left">Stage of metrics</td>
+      <td style="text-align: left">queue(producer only),execution(producer only,total</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">statistic</td>
+      <td style="text-align: left">Normally metric type</td>
+      <td style="text-align: left">tps,count(total call count),max,waitInQueue(producer),latency</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">status</td>
+      <td style="text-align: left">Call result code</td>
+      <td style="text-align: left">200, 404 etc..</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">unit</td>
+      <td style="text-align: left">TimeUint of latency</td>
+      <td style="text-align: left">MILLISECONDS，SECONDS etc..</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="how-to-configuration">How to Configuration</h2>
+<h3 id="global-configuration">Global Configuration</h3>
+<p>Please add window time config in microservice.yaml:</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">metrics</span><span class="pi">:</span>
+    <span class="c1">#window time,same as servo.pollers,unit is millisecond,default value is 5000 (5 seconds)</span>
+    <span class="na">window_time</span><span class="pi">:</span> <span class="m">5000</span>
+</code></pre></div></div>
+<p><strong>In order to decrease difficulty for understand and usage of metrics,we temporary do not support multi window time</strong></p>
+
+<h3 id="maven-configuration">Maven Configuration</h3>
+<p>We just only need add metrics-core dependency:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>metrics-core<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<h2 id="how-to-get-metrics-data">How to Get Metrics Data</h2>
+<p>After configuration completed,you can get collected metrics data via this two method:</p>
+<h3 id="embedded-publish-interface">Embedded publish interface</h3>
+<p>When microservice start-up,metrics-core will auto publish data service using Springmvc provider:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"metricsEndpoint"</span><span class="o">)</span>
+<span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/metrics"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">MetricsPublisher</span> <span class="o">{</span>
+  <span class="nd">@ApiResponses</span><span class="o">({</span>
+      <span class="nd">@ApiResponse</span><span class="o">(</span><span class="n">code</span> <span class="o">=</span> <span class="mi">400</span><span class="o">,</span> <span class="n">response</span> <span class="o">=</span> <span class="nc">String</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">message</span> <span class="o">=</span> <span class="s">"illegal request content"</span><span class="o">),</span>
+  <span class="o">})</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">path</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">,</span> <span class="n">method</span> <span class="o">=</span> <span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+  <span class="nd">@CrossOrigin</span>
+  <span class="kd">public</span> <span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">Double</span><span class="o">&gt;</span> <span class="nf">measure</span><span class="o">()</span> <span class="o">{</span>
+    <span class="k">return</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">measure</span><span class="o">();</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+<p>So,if you had config rest provider in microservice.yaml,like:</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">http://127.0.0.1:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080</span>
+</code></pre></div></div>
+<p>You can open a browser and input http://localhost:8080/metrics direct get metrics data.</p>
+
+<h3 id="direct-programming-get">Direct programming get</h3>
+<p>From above code you can known,the entry of data provider is org.apache.servicecomb.metrics.core.MonitorManager,so if you want develop your own metrics publisher,direct get it is enough.</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">MonitorManager</span> <span class="n">manager</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">();</span>
+<span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">Double</span><span class="o">&gt;</span> <span class="n">metrics</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">measure</span><span class="o">();</span>
+</code></pre></div></div>
+
+<p><strong>Notice: Servo had marked with DEPRECATED by Netflix, we will use Netflix spectator instead in 1.0.0-m2, publish interface will be adjusted</strong></p>
+
+<h2 id="how-to-use-metrics-data">How to Use Metrics Data</h2>
+<p>Metrics data will output as Map&lt;String,Double&gt;,in order to let user easier fetch certain metric value,we provide org.apache.servicecomb.foundation.metrics.publish.MetricsLoader tool class:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="c1">//simulate MonitorManager.getInstance().measure() get all metrics data</span>
+    <span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span> <span class="nc">Double</span><span class="o">&gt;</span> <span class="n">metrics</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">HashMap</span><span class="o">&lt;&gt;();</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=1,K2=2,K3=3)"</span><span class="o">,</span> <span class="mf">100.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=1,K2=20,K3=30)"</span><span class="o">,</span> <span class="mf">200.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=2,K2=200,K3=300)"</span><span class="o">,</span> <span class="mf">300.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"X(K1=2,K2=2000,K3=3000)"</span><span class="o">,</span> <span class="mf">400.0</span><span class="o">);</span>
+
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=1,K2=2,K3=3)"</span><span class="o">,</span> <span class="mf">500.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=10,K2=20,K3=30)"</span><span class="o">,</span> <span class="mf">600.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=100,K2=200,K3=300)"</span><span class="o">,</span> <span class="mf">700.0</span><span class="o">);</span>
+    <span class="n">metrics</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="s">"Y(K1=1000,K2=2000,K3=3000)"</span><span class="o">,</span> <span class="mf">800.0</span><span class="o">);</span>
+
+    <span class="c1">//new MetricsLoader load all metrics data</span>
+    <span class="nc">MetricsLoader</span> <span class="n">loader</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">MetricsLoader</span><span class="o">(</span><span class="n">metrics</span><span class="o">);</span>
+
+    <span class="c1">//get name of 'X' Metrics then group by K1,K2</span>
+    <span class="nc">MetricNode</span> <span class="n">node</span> <span class="o">=</span> <span class="n">loader</span><span class="o">.</span><span class="na">getMetricTree</span><span class="o">(</span><span class="s">"X"</span><span class="o">,</span><span class="s">"K1"</span><span class="o">,</span><span class="s">"K2"</span><span class="o">);</span>
+
+    <span class="c1">//get all Metrics of K1=1 and K2=20</span>
+    <span class="n">node</span><span class="o">.</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"1"</span><span class="o">).</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"20"</span><span class="o">).</span><span class="na">getMetrics</span><span class="o">();</span>
+
+    <span class="c1">//get K3=30 Metric from node</span>
+    <span class="n">node</span><span class="o">.</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"1"</span><span class="o">).</span><span class="na">getChildrenNode</span><span class="o">(</span><span class="s">"20"</span><span class="o">).</span><span class="na">getFirstMatchMetricValue</span><span class="o">(</span><span class="s">"K3"</span><span class="o">,</span><span class="s">"30"</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p><em>More detail can be found in demo/perf/PerfMetricsFilePublisher.java</em></p>
+
+<h2 id="how-to-extend-custom-metrics">How to Extend Custom Metrics</h2>
+<p>Java Chassis Metrics support user extend custom metrics,MonitorManager had a set of method get different type of Monitor:</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Method Name</th>
+      <th style="text-align: left">Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">getCounter</td>
+      <td style="text-align: left">Get a counter monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">getMaxGauge</td>
+      <td style="text-align: left">Get a max monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">getGauge</td>
+      <td style="text-align: left">Get a gauge monitor</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">getTimer</td>
+      <td style="text-align: left">Get a timer monitor</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>Let us use Process Order make an example:</p>
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">class</span> <span class="nc">OrderController</span> <span class="o">{</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Counter</span> <span class="n">orderCount</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Counter</span> <span class="n">orderTps</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">Timer</span> <span class="n">averageLatency</span><span class="o">;</span>
+  <span class="kd">private</span> <span class="kd">final</span> <span class="nc">MaxGauge</span> <span class="n">maxLatency</span><span class="o">;</span>
+
+  <span class="nc">OrderController</span><span class="o">()</span> <span class="o">{</span>
+    <span class="nc">MonitorManager</span> <span class="n">manager</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">();</span>
+    <span class="c1">//"product","levis jeans" and "model","512" are two custom Tag,support multi Tags</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderCount</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getCounter</span><span class="o">(</span><span class="s">"orderCount"</span><span class="o">,</span> <span class="s">"product"</span><span class="o">,</span> <span class="s">"levis jeans"</span><span class="o">,</span> <span class="s">"model"</span><span class="o">,</span> <span class="s">"512"</span><span class="o">);</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderTps</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getCounter</span><span class="o">(</span><span class="nl">StepCounter:</span><span class="o">:</span><span class="k">new</span><span class="o">,</span> <span class="s">"orderGenerated"</span><span class="o">,</span> <span class="s">"statistic"</span><span class="o">,</span> <span class="s">"tps"</span><span class="o">);</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">averageLatency</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getTimer</span><span class="o">(</span><span class="s">"orderGenerated"</span><span class="o">,</span> <span class="s">"statistic"</span><span class="o">,</span> <span class="s">"latency"</span><span class="o">,</span> <span class="s">"unit"</span><span class="o">,</span> <span class="s">"MILLISECONDS"</span><span class="o">);</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">maxLatency</span> <span class="o">=</span> <span class="n">manager</span><span class="o">.</span><span class="na">getMaxGauge</span><span class="o">(</span><span class="s">"orderGenerated"</span><span class="o">,</span> <span class="s">"statistic"</span><span class="o">,</span> <span class="s">"max"</span><span class="o">,</span> <span class="s">"unit"</span><span class="o">,</span> <span class="s">"MILLISECONDS"</span><span class="o">);</span>
+  <span class="o">}</span>
+
+  <span class="kd">public</span> <span class="kt">void</span> <span class="nf">makeOrder</span><span class="o">()</span> <span class="o">{</span>
+    <span class="kt">long</span> <span class="n">startTime</span> <span class="o">=</span> <span class="nc">System</span><span class="o">.</span><span class="na">nanoTime</span><span class="o">();</span>
+    <span class="c1">//process order logic</span>
+    <span class="c1">//...</span>
+    <span class="c1">//process finished</span>
+    <span class="kt">long</span> <span class="n">totalTime</span> <span class="o">=</span> <span class="nc">System</span><span class="o">.</span><span class="na">nanoTime</span><span class="o">()</span> <span class="o">-</span> <span class="n">startTime</span><span class="o">;</span>
+
+    <span class="c1">//increase order count</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderCount</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+    
+    <span class="c1">//increase tps</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">orderTps</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+
+    <span class="c1">//record latency for average</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">averageLatency</span><span class="o">.</span><span class="na">record</span><span class="o">(</span><span class="n">totalTime</span><span class="o">,</span> <span class="nc">TimeUnit</span><span class="o">.</span><span class="na">NANOSECONDS</span><span class="o">);</span>
+
+    <span class="c1">//record max latency</span>
+    <span class="k">this</span><span class="o">.</span><span class="na">maxLatency</span><span class="o">.</span><span class="na">update</span><span class="o">(</span><span class="nc">TimeUnit</span><span class="o">.</span><span class="na">NANOSECONDS</span><span class="o">.</span><span class="na">toMillis</span><span class="o">(</span><span class="n">totalTime</span><span class="o">));</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div></div>
+
+<p>Notice:</p>
+
+<p>1.Metric ID is join name and all tags that pass to MonitorManager when getting monitor,so please keep uniqueness,metrics output of front example are:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Map</span><span class="o">&lt;</span><span class="nc">String</span><span class="o">,</span><span class="nc">Double</span><span class="o">&gt;</span> <span class="n">metrics</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">measure</span><span class="o">();</span>
+
+<span class="c1">//metrics.keySet() include：</span>
+<span class="c1">//	orderCount(product=levis jeans,model=512)</span>
+<span class="c1">//	orderGenerated(statistic=tps)</span>
+<span class="c1">//	orderGenerated(statistic=latency,unit=MILLISECONDS)</span>
+<span class="c1">//	orderGenerated(statistic=max,unit=MILLISECONDS)</span>
+</code></pre></div></div>
+
+<p>2.All get monitor method in MonitorManager act as <strong>get or new</strong>,so use same name and tags will return same one monitor:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nc">Counter</span> <span class="n">counter1</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">getCounter</span><span class="o">(</span><span class="s">"orderGenerated"</span><span class="o">,</span> <span class="s">"product"</span><span class="o">,</span> <span class="s">"levis jeans"</span><span class="o">,</span> <span class="s">"model"</span><span class="o">,</span> <span class="s">"512"</span><span class="o">);</span>
+<span class="nc">Counter</span> <span class="n">counter2</span> <span class="o">=</span> <span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">getCounter</span><span class="o">(</span><span class="s">"orderGenerated"</span><span class="o">,</span> <span class="s">"product"</span><span class="o">,</span> <span class="s">"levis jeans"</span><span class="o">,</span> <span class="s">"model"</span><span class="o">,</span> <span class="s">"512"</span><span class="o">);</span>
+
+<span class="n">counter1</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+<span class="n">counter2</span><span class="o">.</span><span class="na">increment</span><span class="o">();</span>
+
+<span class="nc">Assert</span><span class="o">.</span><span class="na">assertEquals</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span><span class="n">counter1</span><span class="o">.</span><span class="na">getValue</span><span class="o">());</span>
+<span class="nc">Assert</span><span class="o">.</span><span class="na">assertEquals</span><span class="o">(</span><span class="mi">2</span><span class="o">,</span><span class="n">counter2</span><span class="o">.</span><span class="na">getValue</span><span class="o">());</span>
+<span class="nc">Assert</span><span class="o">.</span><span class="na">assertEquals</span><span class="o">(</span><span class="mf">2.0</span><span class="o">,</span><span class="nc">MonitorManager</span><span class="o">.</span><span class="na">getInstance</span><span class="o">().</span><span class="na">measure</span><span class="o">().</span><span class="na">get</span><span class="o">(</span><span class="s">"orderGenerated(product=levis jeans,model=512)"</span><span class="o">),</span><span class="mi">0</span><span class="o">);</span>
+</code></pre></div></div>
+
+<p><strong>Performance of get monitor from MonitorManager is slightly lower,so please get all monitors what needed when init,then cache them for later use,like OrderController example.</strong></p>
+
+<p><strong>Notice: Servo had marked with DEPRECATED by Netflix, we will use Netflix spectator instead in 1.0.0-m2, the way of extending custom metrics will be adjusted</strong></p>
+
+<h2 id="other-reference">Other Reference</h2>
+<p>We had developed two use case for reference:</p>
+<ol>
+  <li>demo/perf:print Metrics in Console;</li>
+  <li>metrics-prometheus:integration with prometheus,publish metrics as prometheus producer.</li>
+</ol>
+
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+          <header>
+            <h1 class="page__title" itemprop="headline">Metrics how integration with prometheus in 1.0.0-m1
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#background" id="markdown-toc-background">Background</a></li>
+  <li><a href="#integration-principles" id="markdown-toc-integration-principles">Integration Principles</a></li>
+  <li><a href="#how-configuration" id="markdown-toc-how-configuration">How Configuration</a>    <ul>
+      <li><a href="#global-configuration" id="markdown-toc-global-configuration">Global Configuration</a></li>
+      <li><a href="#maven-configuration" id="markdown-toc-maven-configuration">Maven Configuration</a></li>
+      <li><a href="#config-prometheusyml-in-prometheus" id="markdown-toc-config-prometheusyml-in-prometheus">Config prometheus.yml in Prometheus</a></li>
+      <li><a href="#verify-output" id="markdown-toc-verify-output">Verify Output</a></li>
+      <li><a href="#config-grafanaoptional" id="markdown-toc-config-grafanaoptional">Config Grafana(optional)</a></li>
+    </ul>
+  </li>
+  <li><a href="#effect-show" id="markdown-toc-effect-show">Effect Show</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Metrics had supported from Java chassis version 0.5.0,in version 1.0.0-m1,we had reconstruction it and add some more features,please checkout the user guide and <a href="https://github.com/apache/servicecomb-java-chassis/releases">release note</a> for more information.Also subscribe ServiceComb mail-list(dev-subscribe@servicecomb.apache.org) and join discussion is welcome.</p>
+
+<h2 id="background">Background</h2>
+<p><a href="http://www.prometheus.io/">Prometheus</a> is a opensource open-source monitoring solution like Google Borgmon,also member of <a href="https://www.cncf.io/">CNCF</a>,community is very active.Java chassis metrics support integration with prometheus in 1.0.0-m1,and can use <a href="https://grafana.com/">Grafana</a> to query metrics data further.</p>
+
+<h2 id="integration-principles">Integration Principles</h2>
+<p>We known Java chassis developed by Java,so we use Simple Client in  <a href="https://github.com/prometheus/client_java">prometheus java client</a> as SDK,the version we use is 0.1.0.<br />
+Prometheus use pull mode collect metrics data,microservice act as producer,we use Simple HTTP Server(also in client java SDK) publish them;<br />
+As an integration(optional) module,the implementation code is in metrics-integration/metrics-prometheus,you can get it’s dependency:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>io.prometheus<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>simpleclient<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>io.prometheus<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>simpleclient_httpserver<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+
+  <span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>metrics-core<span class="nt">&lt;/artifactId&gt;</span>
+  <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<p>So if we import metrics-prometheus,no longer need to add metrics-core dependence.</p>
+
+<h2 id="how-configuration">How Configuration</h2>
+<p>Enable prometheus integration is very easy:</p>
+<h3 id="global-configuration">Global Configuration</h3>
+<p>Please add prometheus port config in microservice.yaml:</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">demo</span>
+<span class="na">service_description</span><span class="pi">:</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">demoService</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span>
+
+<span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">metrics</span><span class="pi">:</span>
+    <span class="na">prometheus</span><span class="pi">:</span>
+      <span class="c1">#prometheus provider port</span>
+      <span class="na">port</span><span class="pi">:</span> <span class="m">9696</span>
+</code></pre></div></div>
+<p><em>If do not config,default value is 9696</em></p>
+<h3 id="maven-configuration">Maven Configuration</h3>
+<p>We just only need add metrics-prometheus dependency:</p>
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    <span class="nt">&lt;dependency&gt;</span>
+      <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+      <span class="nt">&lt;artifactId&gt;</span>metrics-prometheus<span class="nt">&lt;/artifactId&gt;</span>
+      <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+<h3 id="config-prometheusyml-in-prometheus">Config prometheus.yml in Prometheus</h3>
+<p>You need add job in prometheus.yml,like:</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">scrape_configs</span><span class="pi">:</span>
+  <span class="c1"># The job name is added as a label `job=&lt;job_name&gt;` to any timeseries scraped from this config.</span>
+  <span class="pi">-</span> <span class="na">job_name</span><span class="pi">:</span> <span class="s1">'</span><span class="s">prometheus'</span>
+
+    <span class="c1"># metrics_path defaults to '/metrics'</span>
+    <span class="c1"># scheme defaults to 'http'.</span>
+
+    <span class="na">static_configs</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="na">targets</span><span class="pi">:</span> <span class="pi">[</span><span class="s1">'</span><span class="s">localhost:9090'</span><span class="pi">]</span>
+
+  <span class="pi">-</span> <span class="na">job_name</span><span class="pi">:</span> <span class="s1">'</span><span class="s">servicecomb'</span>
+
+    <span class="c1"># metrics_path defaults to '/metrics'</span>
+    <span class="c1"># scheme defaults to 'http'.</span>
+
+    <span class="na">static_configs</span><span class="pi">:</span>
+      <span class="pi">-</span> <span class="na">targets</span><span class="pi">:</span> <span class="pi">[</span><span class="s1">'</span><span class="s">localhost:9696'</span><span class="pi">]</span>
+</code></pre></div></div>
+<p>The job_name: ‘servicecomb’ is our custom job,it will collect metrics data from local microservice localhost:9696,more information about configuration of prometheus can found <a href="https://prometheus.io/docs/prometheus/latest/configuration/configuration/">here</a>.</p>
+
+<h3 id="verify-output">Verify Output</h3>
+<p>Prometheus Simple HTTP Server use /metrics as default URL,metrics-prometheus will use 9696 as default port,after microservice start up you can get metrics data at http://localhost:9696/metrics.</p>
+
+<p>Prometheus Simple HTTP Server provider interface will publish the standard format which prometheus needed:</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code># HELP ServiceComb Metrics ServiceComb Metrics
+# TYPE ServiceComb Metrics untyped
+jvm{name="cpuRunningThreads",statistic="gauge",} 45.0
+jvm{name="heapMax",statistic="gauge",} 3.786407936E9
+jvm{name="heapCommit",statistic="gauge",} 6.12892672E8
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="max",status="200",unit="MILLISECONDS",} 1.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="tps",status="200",} 0.4
+jvm{name="nonHeapCommit",statistic="gauge",} 6.1104128E7
+jvm{name="nonHeapInit",statistic="gauge",} 2555904.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="execution",statistic="max",status="200",unit="MILLISECONDS",} 0.0
+jvm{name="heapUsed",statistic="gauge",} 2.82814088E8
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="latency",status="200",unit="MILLISECONDS",} 1.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="execution",statistic="latency",status="200",unit="MILLISECONDS",} 0.0
+jvm{name="heapInit",statistic="gauge",} 2.66338304E8
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="queue",statistic="waitInQueue",} 0.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="total",statistic="count",status="200",} 39.0
+jvm{name="nonHeapUsed",statistic="gauge",} 5.9361032E7
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="queue",statistic="latency",status="200",unit="MILLISECONDS",} 0.0
+servicecomb_invocation_calculator_calculatorRestEndpoint_calculate{role="producer",stage="queue",statistic="max",status="200",unit="MILLISECONDS",} 0.0
+</code></pre></div></div>
+
+<h3 id="config-grafanaoptional">Config Grafana(optional)</h3>
+<p>How add prometheus as a datasource in grafana can found <a href="https://prometheus.io/docs/visualization/grafana/">here</a>.</p>
+<h2 id="effect-show">Effect Show</h2>
+<p>After complete prometheus config and start up microservice,we can open prometheus web site(default address is http://localhost:9090/),in metrics list java chassis metrics with prefix ‘servicecomb’ can be seen:</p>
+
+<p><img src="/assets/images/MetricsInPrometheus.png" alt="MetricsInPrometheus" /></p>
+
+<p>For get more better data query experience,add prometheus as a datasource in grafana then query metrics data by it:</p>
+
+<p><img src="/assets/images/MetricsInGrafana.png" alt="MetricsInGrafana" /></p>
+
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+    <meta itemprop="headline" content="Running Mode">
+    <meta itemprop="description" content="Running Mode">
+    
+    <meta itemprop="dateModified" content="June 06, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Running Mode
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#standalone-mode" id="markdown-toc-standalone-mode">Standalone Mode</a>    <ul>
+      <li><a href="#procedure" id="markdown-toc-procedure">Procedure</a></li>
+    </ul>
+  </li>
+  <li><a href="#web-container-mode" id="markdown-toc-web-container-mode">WEB Container Mode</a>    <ul>
+      <li><a href="#development-example" id="markdown-toc-development-example">Development Example</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<p>Currently, ServiceComb microservice framework support two kind of deploy mode: standalone mode and web container mode. You are advised to to use standalone to to start your services.</p>
+<h2 id="standalone-mode">Standalone Mode</h2>
+<p>A standalone container is loaded with a simple Main to start Spring. Because the service usually does not need the Web container feature, such as Tomcat/JBoss.</p>
+
+<p>It is not necessary to unload services using the Web container. The microservice framework provides the standalone deployment mode.</p>
+
+<p>The service container is only a simple Main method, and a simple Spring container is loaded to expose services.</p>
+
+<h3 id="procedure">Procedure</h3>
+
+<ul>
+  <li>
+    <p><strong>Step 1</strong>  Compile the Main function to initialize logs and load service configurations. The contents are as follows:</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.BeanUtils</span><span class="o">;</span>
+ <span class="kn">import</span> <span class="nn">org.apache.servicecomb.foundation.common.utils.Log4jUtils</span><span class="o">;</span>
+ <span class="kd">public</span> <span class="kd">class</span> <span class="nc">MainServer</span> <span class="o">{</span>
+   <span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+   <span class="err">　</span><span class="nc">Log4jUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span> <span class="err">#</span><span class="nc">Log</span> <span class="n">initialization</span>
+   <span class="err">　</span><span class="nc">BeanUtils</span><span class="o">.</span><span class="na">init</span><span class="o">();</span> <span class="err">#</span> <span class="nc">Spring</span> <span class="n">bean</span> <span class="n">initialization</span>
+     <span class="c1">// other codes omitted</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Step 2</strong> Run MainServer to start process and expose services.</p>
+
+    <p>NOTE: If the rest network is used, change transparent in the POM file to the cse-transport-rest-vertx package.</p>
+  </li>
+</ul>
+
+<h2 id="web-container-mode">WEB Container Mode</h2>
+<p>If you need to load the microservice to the web container, create a sersvlet project package. You do not need to write or write a small number of boot codes as needed.</p>
+
+<h3 id="development-example">Development Example</h3>
+
+<p><strong>Step 1</strong> Create a servlet project and modify the web.xml file as follows:</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;web-app&gt;</span>
+    <span class="nt">&lt;context-param&gt;</span>
+        <span class="nt">&lt;param-name&gt;</span>contextConfigLocation<span class="nt">&lt;/param-name&gt;</span>
+        <span class="nt">&lt;param-value&gt;</span>
+            classpath*:META-INF/spring/*.bean.xml
+            classpath*:app-config.xml
+        <span class="nt">&lt;/param-value&gt;</span>
+    <span class="nt">&lt;/context-param&gt;</span>
+    <span class="nt">&lt;listener&gt;</span>
+        <span class="nt">&lt;listener-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServletContextListener<span class="nt">&lt;/listener-class&gt;</span>
+    <span class="nt">&lt;/listener&gt;</span>
+
+    <span class="nt">&lt;servlet&gt;</span>
+        <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>
+        <span class="nt">&lt;servlet-class&gt;</span>org.apache.servicecomb.transport.rest.servlet.RestServlet<span class="nt">&lt;/servlet-class&gt;</span>
+        <span class="nt">&lt;load-on-startup&gt;</span>1<span class="nt">&lt;/load-on-startup&gt;</span>
+        <span class="nt">&lt;async-supported&gt;</span>true<span class="nt">&lt;/async-supported&gt;</span>
+    <span class="nt">&lt;/servlet&gt;</span>
+    <span class="nt">&lt;servlet-mapping&gt;</span>
+        <span class="nt">&lt;servlet-name&gt;</span>RestServlet<span class="nt">&lt;/servlet-name&gt;</span>
+        <span class="nt">&lt;url-pattern&gt;</span>/rest/*<span class="nt">&lt;/url-pattern&gt;</span>
+    <span class="nt">&lt;/servlet-mapping&gt;</span>
+<span class="nt">&lt;/web-app&gt;</span>
+</code></pre></div></div>
+
+<ul>
+  <li><strong>Step 2 Modify the POM file</strong></li>
+</ul>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependencies&gt;</span>
+    <span class="nt">&lt;dependency&gt;</span>
+        <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+        <span class="nt">&lt;artifactId&gt;</span>transport-rest-servlet<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;/dependency&gt;</span>
+<span class="nt">&lt;/dependencies&gt;</span>
+<span class="nt">&lt;build&gt;</span>
+    <span class="nt">&lt;finalName&gt;</span>test<span class="nt">&lt;/finalName&gt;</span>
+<span class="nt">&lt;/build&gt;</span>
+</code></pre></div></div>
+
+<p><strong>NOTICE:</strong></p>
+<ol>
+  <li>The Restful call must be separated from other static resources (such as HTML and js) in the web container. The next segment of webroot should have a keyword, such as rest in this example (/test/rest) in web.xml</li>
+  <li>The Tomcat is used as an example. Each WAR package has unique webroot, which must be a basePath prefix. For example , if webroot is test, all the API definitions of the microservice must start with /test.</li>
+  <li>When the microservice is loaded to the web container and the HTTP and HTTPS ports are opened using the web container, which must meet requirements for the web container rules.</li>
+</ol>
+
+        
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+            <h1 class="page__title" itemprop="headline">Service Configurations
+</h1>
+            
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+        
+      
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+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#load-balancing-policy" id="markdown-toc-load-balancing-policy">Load Balancing Policy</a></li>
+  <li><a href="#rate-limiting-policy" id="markdown-toc-rate-limiting-policy">Rate Limiting Policy</a>    <ul>
+      <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+      <li><a href="#precautions" id="markdown-toc-precautions">Precautions</a></li>
+      <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a></li>
+    </ul>
+  </li>
+  <li><a href="#fallback-policy" id="markdown-toc-fallback-policy">Fallback Policy</a>    <ul>
+      <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+      <li><a href="#scenario-1" id="markdown-toc-scenario-1">Scenario</a></li>
+      <li><a href="#configuration-1" id="markdown-toc-configuration-1">Configuration</a></li>
+    </ul>
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+
+<h2 id="load-balancing-policy">Load Balancing Policy</h2>
+<p>The content of this page has been outdated, please refer to <a href="https://docs.servicecomb.io/java-chassis/en_US/references-handlers/loadbalance.html">Load Balancing</a></p>
+
+<h2 id="rate-limiting-policy">Rate Limiting Policy</h2>
+<h3 id="scenario">Scenario</h3>
+
+<p>Users at the provider end can use the rate limiting policy to limit the maximum number of requests sent from a specified microservice per second.</p>
+
+<h3 id="precautions">Precautions</h3>
+
+<ol>
+  <li>There may be a small different between the rate limit and actual traffic.</li>
+  <li>The rate limit function at the provider end is for service rather than security purpose. To prevent distributed denial of service(DDos) attacks, you need to take other measures.</li>
+  <li>Traffic control is a microservice-level rather than process-level function.</li>
+</ol>
+
+<h3 id="configuration">Configuration</h3>
+
+<p>　　Rate limiting policies are configured in the microservice.yaml file. For related configuration items, see Table 2. To enable the rate limiting policy at the provider end, you also need to configure the rate limiting handler on the server in the processing chain and add dependencies in the pom.xml file.</p>
+
+<p>　　An example of microservice.yaml file configuration is as follows,</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-provider</span>
+</code></pre></div></div>
+
+<p>　　Add dependencies of handler-flowcontrol-qps in the pom.xml file,</p>
+
+<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;dependency&gt;</span>
+    <span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>handler-flowcontrol-qps<span class="nt">&lt;/artifactId&gt;</span>
+    <span class="nt">&lt;version&gt;</span>1.0.0-m1<span class="nt">&lt;/version&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre></div></div>
+
+<p>　　<strong>Table2 Configuration items of the QPS rate limit</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Provider.qps.enabled</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">true/false</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether to enable traffic control  at the provider end.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Provider.qps.limit.[ServiceName]</td>
+      <td style="text-align: left">2147483647（max int）</td>
+      <td style="text-align: left">(0,2147483647]，Integer</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of requests allowed per second.</td>
+      <td style="text-align: left">This parameter can only be configured for microservice</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.flowcontrol.Provider.qps.global.limit</td>
+      <td style="text-align: left">2147483647（max int）</td>
+      <td style="text-align: left">(0,2147483647]，Integer</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the total number of requests allowed per second at the provider end</td>
+      <td style="text-align: left">If no configuration is set for any specific microservices, this parameter takes effect</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>##</p>
+<h2 id="fallback-policy">Fallback Policy</h2>
+
+<h3 id="concept-description">Concept Description</h3>
+
+<p>A fallback policy is used when a service request is abnormal.</p>
+
+<p>There are three key concepts in fallback: isolation, fallbreak, and fault tolerance:</p>
+
+<ul>
+  <li>Isolation is an exception detection mechanism. Two common items that need to be detected are timeout duration and the number of concurrent requests.</li>
+  <li>Fallbreak is an exception response mechanism, and it depends on isolation. Fallbreak is triggered based on the error rate. Two common items need to set are the number of requests to collect and error rate.</li>
+  <li>Fault tolerance is an exception handling mechanism that depends on fallbreak. Fault tolerance is called after a fallbreak. For fault tolerance, you need to set the number of fault tolerance call items.</li>
+</ul>
+
+<p>During fallback, if M(the threshold) errors are detected in N requests, the consumer will no longer send requests  and the fault tolerance mechanism will be enabled. The preceding fallback process is accepted in Netflix Hystrix and helps you configure the parameters. Obtain information about the parameter configuration at <a href="https://github.com/Netflix/Hystrix/wiki/Configuration">https://github.com/Netflix/Hystrix/wiki/Configuration</a>. Currently, ServiceComb provides two types of fault tolerance modes: returning null values and throwing exceptions.</p>
+
+<h3 id="scenario-1">Scenario</h3>
+
+<p>By configuring a fallback policy, you can handler microservice exceptions.</p>
+
+<h3 id="configuration-1">Configuration</h3>
+
+<p>　　Configuration items of fallback policies are as follows:</p>
+
+<p>　　<strong>Table 3 Configuration items of the fallback policy</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">servicecomb.isolation.timeout.enabled</td>
+      <td style="text-align: left">FALSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether to enable timeout detection.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.isolation.timeoutInMilliseconds</td>
+      <td style="text-align: left">30000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the timeout duration threshold.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.isolation.maxConcurrentRequests</td>
+      <td style="text-align: left">10</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the maximum number of concurrent requests.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.enabled</td>
+      <td style="text-align: left">TRUE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether to enable fallbreak.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.forceOpen</td>
+      <td style="text-align: left">FALSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies that fallbreak is enable regardless of the number of failed requests or the error rate.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.forceClosed</td>
+      <td style="text-align: left">FALSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies that fallbreak can be implemented at any time.</td>
+      <td style="text-align: left">If this parameter and servicecomb.circuitBreaker.forceOpen both need to be configured, servicecomb.circuitBreaker.forceOpen has priority.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.sleepWindowInMilliseconds</td>
+      <td style="text-align: left">15000</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the duration needed to recover from fallbreak.</td>
+      <td style="text-align: left">After the recovery, the number of failed requests will be recalculated. Note: If the consumer fails to send a request to the provider after the recovery, fallbreak is enabled again.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.requestVolumeThreshold</td>
+      <td style="text-align: left">20</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the threshold of failed requests sent within 10 seconds. If the threshold is reached, fallbreak is triggered.</td>
+      <td style="text-align: left">Ten seconds will be divided into ten 1 seconds, and the error rate is calculated 1 second later after an error occurred. Therefore, fallbreak can be implemented at least 1 second after the call.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.circuitBreaker.errorThresholdPercentage</td>
+      <td style="text-align: left">50</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the threshold of error rate. If the threshold is reached, fallbreak is triggered.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.fallback.enabled</td>
+      <td style="text-align: left">TRUE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether to enable troubleshooting measures after an error occurred.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.fallback.maxConcurrentRequests</td>
+      <td style="text-align: left">10</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the number of fault tolerance(servicecomb.fallbackpolicy.policy) requests concurrently called. If the value exceeds 10, the measures will no longer be called, and exception are returned.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">servicecomb.fallbackpolicy.policy</td>
+      <td style="text-align: left">throwexception</td>
+      <td style="text-align: left">returnnulll | throwexception</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the error handling policies after an error occurred.</td>
+      <td style="text-align: left"> </td>
+    </tr>
+  </tbody>
+</table>
+
+<p class="notice--warning"><strong>Caution:</strong> Be cautious when setting servicecomb.isolation.timeout.enabled to TRUE, All processes are asynchronously processed in the system, and any error value returned by an intermediate process because the set timeout duration is reached can cause failure of the follow-up processes. Therefore, you are advised to keep the default value FALSE for servicecomb.isolation.timeout.enabled. For timeout duration from the network aspect, you are advised to set servicecomb.request.timeout=30000.</p>
+
+<h2 id="sample-code">Sample Code</h2>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Consumer</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-consumer</span>
+  <span class="na">isolation</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">timeout</span><span class="pi">:</span>
+        <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+      <span class="na">timeoutInMilliseconds</span><span class="pi">:</span> <span class="m">30000</span>
+  <span class="na">circuitBreaker</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">sleepWindowInMilliseconds</span><span class="pi">:</span> <span class="m">15000</span>
+      <span class="na">requestVolumeThreshold</span><span class="pi">:</span> <span class="m">20</span>
+  <span class="na">fallback</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">enabled</span><span class="pi">:</span> <span class="no">true</span>
+  <span class="na">fallbackpolicy</span><span class="pi">:</span>
+    <span class="na">Consumer</span><span class="pi">:</span>
+      <span class="na">policy</span><span class="pi">:</span> <span class="s">throwexception</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>NOTE:</strong></p>
+
+  <p>You need to enable service governance for fallback, The provider handler is <code class="highlighter-rouge">bizkeeper-provider</code>, and the consumer handler is <code class="highlighter-rouge">bizkeeper-consumer</code>. If <code class="highlighter-rouge">Consumer:</code>/<code class="highlighter-rouge">Provider:</code> was omitted, your configuration would not work, and service governance would be enabled with default configuration.</p>
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+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#explicit-api-definition" id="markdown-toc-explicit-api-definition">Explicit API Definition</a>    <ul>
+      <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a></li>
+      <li><a href="#sample-code" id="markdown-toc-sample-code">Sample Code</a></li>
+    </ul>
+  </li>
+  <li><a href="#implicit-api-definition" id="markdown-toc-implicit-api-definition">Implicit API Definition</a>    <ul>
+      <li><a href="#concept-description-1" id="markdown-toc-concept-description-1">Concept Description</a></li>
+      <li><a href="#scenario-1" id="markdown-toc-scenario-1">Scenario</a></li>
+      <li><a href="#involved-api" id="markdown-toc-involved-api">Involved API</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>The API of provider and consumer microservice is defined based on OpenAPI regulations.</p>
+
+<h2 id="scenario">Scenario</h2>
+
+<p>The API definition decouples providers and consumers, which allows the two parties to use different programming languages, Providers provide services and consumers call them based on the API definition.</p>
+
+<h2 id="explicit-api-definition">Explicit API Definition</h2>
+
+<h3 id="configuration">Configuration</h3>
+
+<p>ServiceComb defines API in a .yaml file. You are advised to use <a href="http://editor.swagger.io/#/">Swagger Editor</a> to write an API definition. This tool can check syntax and automaticlly generate an API document. For details about the API definition file format, see <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md"> Official OpenAPI documentation</a>。</p>
+
+<p>The API definition file is located in “resources/microservices” or “resources/applications” directory. The directory structure is as follows:</p>
+
+<pre><code class="language-txt">resources
+  - microservices
+    - serviceName #Microservice name
+      - schemaId.yaml #schema API definition
+  - applications
+    - appId #Application ID
+      - serviceName #Service name
+        - schemaId.yaml #Schema API definition
+</code></pre>
+
+<h3 id="sample-code">Sample Code</h3>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">swagger</span><span class="pi">:</span> <span class="s1">'</span><span class="s">2.0'</span>
+<span class="na">info</span><span class="pi">:</span>
+  <span class="na">title</span><span class="pi">:</span> <span class="s">hello</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">1.0.0</span>
+  <span class="na">x-java-interface</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.samples.common.schema.Hello</span>
+<span class="na">basePath</span><span class="pi">:</span> <span class="s">/springmvchello</span>
+<span class="na">produces</span><span class="pi">:</span>
+  <span class="pi">-</span> <span class="s">application/json</span>
+
+<span class="na">paths</span><span class="pi">:</span>
+  <span class="s">/sayhi</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">sayHi</span>
+      <span class="na">parameters</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">name</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">query</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="na">200</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">returned for a correct result</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+        <span class="na">default</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">returned for a default result</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+  <span class="s">/sayhello</span><span class="pi">:</span>
+    <span class="na">post</span><span class="pi">:</span>
+      <span class="na">operationId</span><span class="pi">:</span> <span class="s">sayHello</span>
+      <span class="na">parameters</span><span class="pi">:</span>
+        <span class="pi">-</span> <span class="na">name</span><span class="pi">:</span> <span class="s">person</span>
+          <span class="na">in</span><span class="pi">:</span> <span class="s">body</span>
+          <span class="na">required</span><span class="pi">:</span> <span class="no">true</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="s">$ref</span><span class="pi">:</span> <span class="s2">"</span><span class="s">#/definitions/Person"</span>
+      <span class="na">responses</span><span class="pi">:</span>
+        <span class="na">200</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">returned for a correct result</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+        <span class="na">default</span><span class="pi">:</span>
+          <span class="na">description</span><span class="pi">:</span> <span class="s">returned for a default result</span>
+          <span class="na">schema</span><span class="pi">:</span>
+            <span class="na">type</span><span class="pi">:</span> <span class="s">string</span>
+<span class="na">definitions</span><span class="pi">:</span>
+  <span class="na">Person</span><span class="pi">:</span>
+    <span class="na">type</span><span class="pi">:</span> <span class="s2">"</span><span class="s">object"</span>
+    <span class="na">properties</span><span class="pi">:</span>
+      <span class="na">name</span><span class="pi">:</span>
+        <span class="na">type</span><span class="pi">:</span> <span class="s2">"</span><span class="s">string"</span>
+        <span class="na">description</span><span class="pi">:</span> <span class="s2">"</span><span class="s">person</span><span class="nv"> </span><span class="s">name"</span>
+    <span class="na">xml</span><span class="pi">:</span>
+      <span class="na">name</span><span class="pi">:</span> <span class="s2">"</span><span class="s">Person"</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p><strong>NOTE</strong>：</p>
+  <ul>
+    <li>According to Swagger specifications, the path specified by basePath should contain the webroot of the web server.</li>
+    <li>info.x-java-interface requires a specific API path. Set it as needed.</li>
+  </ul>
+</blockquote>
+
+<h2 id="implicit-api-definition">Implicit API Definition</h2>
+<h3 id="concept-description-1">Concept Description</h3>
+
+<p>　　The inplicit API definition is automatically generated by ServiceComb based on the service implementation class.</p>
+
+<h3 id="scenario-1">Scenario</h3>
+
+<p>　　By using the implicit API definition you can define the implementation class without pre-defining APIs. When the service is started, an API is automatically generated and registered to the service center.</p>
+
+<h3 id="involved-api">Involved API</h3>
+
+<p>　　Implicit API definitions can be used for Spring MVC, JAX-RS, and transparent RPC development modes, For details, see <a href="/users/develop-with-springmvc/">Development Style-SpringMVC</a>, <a href="/users/develop-with-jax-rs/">Development Stype-JAX-RS</a> and <a href="/users/develop-with-transparent-rpc/">Development Style-Transparent RPC</a>.</p>
+
+<p>　　When you develop a microservice in transparent RPC mode, the code does not show how you want to define an API, and all generated APIs are POST methods, The input parameters of all the methods will be packaged as a class and transferred as body parameters. Therefore, if you develop providers using implicit APIs, you are advised to choose Spring MVC or JAX-RS mode to obtain complete RESTful statements.</p>
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Service Definition">
+    <meta itemprop="description" content="Service Definition">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Service Definition
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#concept-description" id="markdown-toc-concept-description">Concept Description</a></li>
+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a></li>
+  <li><a href="#sample-code" id="markdown-toc-sample-code">Sample Code</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="concept-description">Concept Description</h2>
+
+<p>A service definition identifies a microservice. It defines the service name, version, and the application that the service belongs to. The service definition can also contain extended information defining the attribute metadata of a service.</p>
+
+<h2 id="scenario">Scenario</h2>
+
+<p>To define a new microservice or modify its basic information, you may need to create and modify service definitions.</p>
+
+<h2 id="configuration">Configuration</h2>
+
+<p>This section describe the following configration items related to the microservice.yaml file in the src\main\resources\ directory.</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration on Item</th>
+      <th style="text-align: left">Default</th>
+      <th style="text-align: left">Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">APPLICATION_ID</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Indicates an application name.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.name</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Indicates a microservice name</td>
+      <td style="text-align: left">The microservice name should be unique within an application. The name can contain digits, uppercase and lowercase letters, hyphens(-), underscores(_), and periods(.); and can neither start nor end with punctuations. The naming rule is as follows: ^[a-zA-Z0-9]+$|^[a-zA-Z0-9][a-zA-Z0-9_-.]*[a-zA-Z0-9]$.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.version</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">Yes</td>
+      <td style="text-align: left">Indicates a service version.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.properties</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Configures microservice metadata(in the microservice.yaml file).</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">service_description.propertyExtendedClass</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Configures microservice metadata(through the PropertyExtended API).</td>
+      <td style="text-align: left">The configurations returned through the API will overwrite those with the same keys in the configuration file.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">instance_description.properties</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Configures instance metadata(in the microservice.yaml file)</td>
+      <td style="text-align: left"> </td>
+    </tr>
+    <tr>
+      <td style="text-align: left">instance_description.propertyExtendedClass</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Configures microservice metadata(through the PropertyExtended API).</td>
+      <td style="text-align: left">The configurations returned through the API will overwrite thos with the same keys in the configuration file.</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p>NOTE：</p>
+  <ul>
+    <li>The metadata of a service is registered to the service center with the service. It is changed together with the service version. Changing metadata in the service center will keep the version unchanged.</li>
+    <li>By default, one microservice can be called by only one APPLICATION_ID. You can set allowCrossApp=true in microservice properties to access a microservice acroos APPLICATION_ID.</li>
+  </ul>
+</blockquote>
+
+<h2 id="sample-code">Sample Code</h2>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">APPLICATION_ID</span><span class="pi">:</span> <span class="s">helloTest</span> <span class="c1">#Application name</span>
+<span class="na">service_description</span><span class="pi">:</span> <span class="c1">#Service description</span>
+  <span class="na">name</span><span class="pi">:</span> <span class="s">helloServer</span> <span class="c1">#Microservice name</span>
+  <span class="na">version</span><span class="pi">:</span> <span class="s">0.0.1</span> <span class="c1">#Service version</span>
+  <span class="na">properties</span><span class="pi">:</span> <span class="c1">#Metadata</span>
+<span class="err"> </span><span class="s">   allowCrossApp</span><span class="pi">:</span> <span class="no">false</span>
+ <span class="s">   key1</span><span class="pi">:</span> <span class="s">value1</span>
+    <span class="s">key2</span><span class="pi">:</span> <span class="s">value2</span>
+  <span class="s">propertyExtendedClass</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.serviceregistry.MicroServicePropertyExtendedStub</span>
+<span class="na">instance_description</span><span class="pi">:</span> <span class="c1">#Instance description</span>
+  <span class="na">properties</span><span class="pi">:</span> <span class="c1">#Metadata</span>
+    <span class="na">key3</span><span class="pi">:</span> <span class="s">value3</span>
+  <span class="na">propertyExtendedClass</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.serviceregistry.MicroServicePropertyExtendedStub</span>
+</code></pre></div></div>
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content/docs/users/service-heartbeat/index.html

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+            <h1 class="page__title" itemprop="headline">Service Heartbeat
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+<h2 id="scenario">Scenario</h2>
+
+<p>After a microservice instance is registered in the service center, the microservice need to periodically send heartbeats to the service center. If the service center receives no heartbeat within a specific period, the instance will be un-registered.</p>
+
+<h2 id="involved-apis">Involved APIs</h2>
+
+<ul>
+  <li><code class="highlighter-rouge">org.apache.servicecomb.serviceregistry.client.ServiceRegistryClient</code> is the service client.</li>
+</ul>
+
+<p><code class="highlighter-rouge">ServiceRegistryClient</code> provides heartbeat to send heartbeats. You can call it as required. The sample code is as follows:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="nc">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">Exception</span> <span class="o">{</span>
+  <span class="c1">// Register the microservice and the instance first</span>
+  <span class="c1">// Send the heartbeats. Otherwise, the instances will be lost.</span>
+  <span class="k">while</span> <span class="o">(</span><span class="kc">true</span><span class="o">)</span> <span class="o">{</span>
+    <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"heartbeat sended:"</span> <span class="o">+</span> <span class="n">client</span><span class="o">.</span><span class="na">heartbeat</span><span class="o">(</span><span class="n">service2</span><span class="o">.</span><span class="na">getServiceId</span><span class="o">(),</span> <span class="n">instance</span><span class="o">.</span><span class="na">getInstanceId</span><span class="o">()));</span>
+    <span class="nc">Thread</span><span class="o">.</span><span class="na">sleep</span><span class="o">(</span><span class="mi">3000</span><span class="o">);</span>
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+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
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+  <li><a href="#api-constraints" id="markdown-toc-api-constraints">API Constraints</a></li>
+  <li><a href="#detailed-constraint-list" id="markdown-toc-detailed-constraint-list">Detailed Constraint List</a></li>
+  <li><a href="#protocol-difference" id="markdown-toc-protocol-difference">Protocol Difference</a></li>
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+
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+
+<h2 id="api-constraints">API Constraints</h2>
+<p>A Java Chassis API constraints is that an API definition should describe its usage. You can identify how to call the API without checking the code.</p>
+
+<p>As developers, we aim at making our APIs easy to be called. However, developers have different understanding about this aim.</p>
+
+<p>For example:</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nc">String</span> <span class="n">id</span><span class="o">);</span>
+<span class="kd">public</span> <span class="nc">Object</span> <span class="nf">query</span><span class="o">(</span><span class="nc">String</span> <span class="n">id</span><span class="o">);</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">Person</span> <span class="o">{</span><span class="nc">String</span> <span class="n">name</span><span class="o">;}</span>
+</code></pre></div></div>
+
+<p>Obviously, if API 1 is called, we know that an ID parameter of String type needs to be transferred. The returned value is of Person type, which contains a string-typed name parameter. If API 2 is called, we do not know how to process the returned value, and need to refer to documents provided by the service provider. API 2 is developed in the perspective of RPC developers.</p>
+
+<p>To release an API as a REST API, we can use the swagger file; specify the ID to be transmitted using RequestParam, PathVariable, or RequestBody; or use the label provided by SpringMVC or JAX-RS.</p>
+
+<div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nd">@RequestParam</span> <span class="nc">String</span> <span class="n">id</span><span class="o">);</span> 
+<span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nd">@PathVariable</span> <span class="nc">String</span> <span class="n">id</span><span class="o">);</span> 
+<span class="kd">public</span> <span class="nc">Person</span> <span class="nf">query</span><span class="o">(</span><span class="nd">@RequestBody</span> <span class="nc">String</span> <span class="n">id</span><span class="o">);</span> 
+</code></pre></div></div>
+
+<p>Generally , simple data types, such as String and int, are transmitted in RequestParam or PathVariable, and complex data types are transmitted in RequestBody after being coded using JSON, to reduce problems cause by HTTP protocol restrictions on developers.</p>
+
+<h2 id="detailed-constraint-list">Detailed Constraint List</h2>
+<p>Developers cannot use the following types to define APIs:</p>
+
+<ul>
+  <li>Abstract data structures, such as  java.lang.Object, net.sf.json.JsonObject</li>
+  <li>API or abstract class
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">interface</span> <span class="nc">IPerson</span> <span class="o">{...}</span>
+ <span class="kd">public</span> <span class="kd">abstract</span> <span class="kd">class</span> <span class="nc">AbstractPerson</span>  <span class="o">{...}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>Generic type
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">class</span> <span class="nc">PersonHolder</span><span class="o">&lt;</span><span class="no">T</span><span class="o">&gt;</span> <span class="o">{...}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>A collection type of the preceding types or a set without a specified type, such as <code class="highlighter-rouge">List&lt;IPerson&gt;, Map&lt;String, PersonHolder&lt;?&gt;&gt;, List, Map</code>. such as <code class="highlighter-rouge">List&lt;String&gt;, List&lt;Person&gt;</code> are supported.</p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="kd">public</span> <span class="kd">class</span> <span class="nc">GroupOfPerson</span> <span class="o">{</span><span class="nc">IPerson</span> <span class="n">master</span> <span class="o">...}</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<p>Developers do not need to worry about the constraints. The program automatically checks them when it is started, and displays types as properties.</p>
+
+<h2 id="protocol-difference">Protocol Difference</h2>
+<p>Although ServiceComb-Java-Chassis implements transparent transmission between protocols, there are slight differences between protocols due to the limitations of the underlying protocols:</p>
+
+<ul>
+  <li>
+    <p>Map, The key supports only string.</p>
+  </li>
+  <li>highway (protobuf restriction)
+    <ol>
+      <li>Null values cannot be transmitted over the network, including elements in Collection and array, and value in map.</li>
+      <li>The array and list with the length of 0 are not transmitted over the network. The receiver obtains the default value after decoding them.</li>
+    </ol>
+  </li>
+  <li>springmvc
+    <ol>
+      <li>Date cannot be used for the path or query parameter. Spring MVC stores toString in path and query, which does not match the swagger standard.</li>
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+          
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+    <meta itemprop="headline" content="Setup Environment">
+    <meta itemprop="description" content="Setup Environment">
+    
+    <meta itemprop="dateModified" content="April 13, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Setup Environment
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#setup-local-java-develop-environment" id="markdown-toc-setup-local-java-develop-environment">Setup Local Java Develop Environment</a></li>
+  <li><a href="#starting-service-center" id="markdown-toc-starting-service-center">Starting Service Center</a>    <ul>
+      <li><a href="#starting-stand-alone-service-center" id="markdown-toc-starting-stand-alone-service-center">Starting Stand-alone Service Center</a></li>
+      <li><a href="#starting-clustered-service-center" id="markdown-toc-starting-clustered-service-center">Starting Clustered Service Center</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="setup-local-java-develop-environment">Setup Local Java Develop Environment</h2>
+
+<ul>
+  <li>
+    <p>Setup git，Refer to <a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git">How to setup git</a></p>
+  </li>
+  <li>
+    <p>Setup JDK 1.8，Refer to <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html" target="_blank">How to setup JDK</a>。</p>
+  </li>
+  <li>
+    <p>Setup Maven 3.x，Refer to <a href="https://maven.apache.org/install.html" target="_blank">How to setup Maven</a>。</p>
+  </li>
+  <li>
+    <p>Setup IntelliJ Idea IDE，Refer to <a href="https://www.jetbrains.com/help/idea/installing-and-launching.html" target="_blank">How to setup IntelliJ</a>。</p>
+  </li>
+</ul>
+
+<h2 id="starting-service-center">Starting Service Center</h2>
+<h3 id="starting-stand-alone-service-center">Starting Stand-alone Service Center</h3>
+<p>There are two ways to start a stand-alone service center service:</p>
+
+<ol>
+  <li>
+    <p>Start from installation package</p>
+
+    <ul class="nav nav-tabs">
+  <li data-toggle="tab" class="active"><a data-toggle="tab" href="#windows">Windows</a></li>
+  <li data-toggle="tab"><a data-toggle="tab" href="#linux">Linux</a></li>
+</ul>
+
+    <div class="tab-content">
+  <div id="windows" class="tab-pane active">
+        <ol>
+          <li>Download <a href="http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz">the installation package of ServiceCenter</a></li>
+          <li>Decompress the installation package into the installation directory.</li>
+          <li>Start Local ServiceCenter from <strong>start-service-center.bat</strong> file</li>
+        </ol>
+      </div>
+ <div id="linux" class="tab-pane fade">
+        <ol>
+          <li>Download and Decompress command:
+            <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>wget http://apache.org/dyn/closer.cgi/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz
+<span class="nb">tar </span>xvf apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz
+</code></pre></div>            </div>
+          </li>
+          <li>Start local service center command:
+            <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>bash apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64/start-service-center.sh
+</code></pre></div>            </div>
+          </li>
+        </ol>
+
+        <p class="notice--warning">NOTE：Frontend will bind ipv6 address under Linux, so browser may report error, fix method：Modify httpaddr in conf/app.conf with a reachable ip, then modify <code class="highlighter-rouge">ip : 'http://127.0.0.1'</code> in app/appList/apiList.js with same ip, final restart ServiceCenter.</p>
+
+      </div>
+</div>
+
+    <p class="notice--warning">NOTE：The OS must be 64-bit.</p>
+  </li>
+  <li>
+    <p>Start from Docker</p>
+  </li>
+</ol>
+
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center
+docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest
+</code></pre></div></div>
+
+<p class="notice--warning"><strong>NOTE：</strong> Running Service Center will bind on: <em>http://127.0.0.1:30100</em>。<br />
+If using Docker Toolbox，command <code class="highlighter-rouge">docker-machine ip</code> can be used to get binded IP address.</p>
+
+<h3 id="starting-clustered-service-center">Starting Clustered Service Center</h3>
+<p>As Service-center is a stateless application so it can be seamlessly deployed in cluster mode to achieve HA.</p>
+
+<p>SC is dependent on the <a href="https://github.com/coreos/etcd">etcd</a> to store the micro-services information so you can opt for running etcd standalone or in <a href="https://coreos.com/etcd/docs/latest/op-guide/runtime-configuration.html">cluster</a> mode.</p>
+
+<p>Notice: We strongly recommend running etcd in cluster mode in order to get the perfect HA ability. In this <a href="https://coreos.com/etcd/docs/latest/op-guide/runtime-configuration.html">document</a> we can know it is highly recommended to always have a cluster size greater than two in production in order to prevent Majority Failure.</p>
+
+<p>Once you are done with installing the etcd either in cluster or standalone mode then you can follow the below steps to run the Service-Center.</p>
+
+<p>Let’s assume you want to install 2 instances of Service-Center on VM with following details</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: center">Name</th>
+      <th style="text-align: center">Address</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: center">VM1</td>
+      <td style="text-align: center">10.12.0.1</td>
+    </tr>
+    <tr>
+      <td style="text-align: center">VM2</td>
+      <td style="text-align: center">10.12.0.2</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>Here we assume your etcd is running on http://10.12.0.4:2379 (you can follow <a href="https://github.com/coreos/etcd/blob/master/Documentation/op-guide/container.md">this</a> guide to install etcd in cluster mode.)</p>
+
+<h5 id="step-1">Step 1</h5>
+<p>Download the SC release from <a href="https://github.com/apache/incubator-servicecomb-service-center/releases">here</a> on all the VM’s.</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">tar</span> <span class="nt">-xvf</span> service-center-X.X.X-linux-amd64.tar.gz
+</code></pre></div></div>
+
+<p>Note: Please don’t run start-service-center.sh as it will also start the built-in etcd.</p>
+
+<h5 id="step-2">Step 2</h5>
+<p>Edit the configuration of the ip/port on which SC will run and etcd ip</p>
+<h6 id="vm1">VM1</h6>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>vi conf/app.conf
+</code></pre></div></div>
+
+<p>Replace the below values :</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>httpaddr = 10.12.0.1
+manager_cluster = "10.12.0.4:2379"
+</code></pre></div></div>
+
+<p>Then start the Service-center :</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>./service-center
+</code></pre></div></div>
+
+<h6 id="vm2">VM2</h6>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>vi conf/app.conf
+</code></pre></div></div>
+
+<p>Replace the below values :</p>
+<div class="language-text highlighter-rouge"><div class="highlight"><pre class="highlight"><code>httpaddr = 10.12.0.2
+manager_cluster = "10.12.0.4:2379"
+</code></pre></div></div>
+
+<p>Then start the Service-center :</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>./service-center
+</code></pre></div></div>
+
+<p>Note: In <code class="highlighter-rouge">manger_cluster</code> you can put the multiple instances of etcd in the cluster like :</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>manager_cluster= "10.12.0.4:2379,10.12.0.X:2379,10.12.0.X:2379"
+</code></pre></div></div>
+
+<h5 id="step-3">Step 3</h5>
+<p>Verify your instances via :</p>
+<div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>curl http://10.12.0.1:30101/v4/default/registry/health
+</code></pre></div></div>
+<p>Will return :</p>
+<div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w">
+    </span><span class="nl">"instances"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+        </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"instanceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"d6e9e976f9df11e7a72b286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"serviceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"d6e99f4cf9df11e7a72b286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"endpoints"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+                </span><span class="s2">"rest://10.12.0.1:30100"</span><span class="w">
+            </span><span class="p">],</span><span class="w">
+            </span><span class="nl">"hostName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"service_center_10_12_0_1"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"UP"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"healthCheck"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+                </span><span class="nl">"mode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"push"</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"interval"</span><span class="p">:</span><span class="w"> </span><span class="mi">30</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"times"</span><span class="p">:</span><span class="w"> </span><span class="mi">3</span><span class="w">
+            </span><span class="p">},</span><span class="w">
+            </span><span class="nl">"timestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012543"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"modTimestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012543"</span><span class="w">
+        </span><span class="p">},</span><span class="w">
+        </span><span class="p">{</span><span class="w">
+            </span><span class="nl">"instanceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"16d4cb35f9e011e7a58a286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"serviceId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"d6e99f4cf9df11e7a72b286ed488ff9f"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"endpoints"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w">
+                </span><span class="s2">"rest://10.12.0.2:30100"</span><span class="w">
+            </span><span class="p">],</span><span class="w">
+            </span><span class="nl">"hostName"</span><span class="p">:</span><span class="w"> </span><span class="s2">"service_center_10_12_0_2"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"status"</span><span class="p">:</span><span class="w"> </span><span class="s2">"UP"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"healthCheck"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w">
+                </span><span class="nl">"mode"</span><span class="p">:</span><span class="w"> </span><span class="s2">"push"</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"interval"</span><span class="p">:</span><span class="w"> </span><span class="mi">30</span><span class="p">,</span><span class="w">
+                </span><span class="nl">"times"</span><span class="p">:</span><span class="w"> </span><span class="mi">3</span><span class="w">
+            </span><span class="p">},</span><span class="w">
+            </span><span class="nl">"timestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012650"</span><span class="p">,</span><span class="w">
+            </span><span class="nl">"modTimestamp"</span><span class="p">:</span><span class="w"> </span><span class="s2">"1516012650"</span><span class="w">
+        </span><span class="p">}</span><span class="w">
+    </span><span class="p">]</span><span class="w">
+</span><span class="p">}</span><span class="w">
+</span></code></pre></div></div>
+
+<p>As we can see here the Service-Center can auto-discover all the instances of the Service-Center running in cluster, this auto-discovery feature is used by the <a href="https://github.com/apache/incubator-servicecomb-java-chassis">Java-Chassis SDK</a> to auto-discover all the instances of the Service-Center by knowing at least one IP of Service-Center running in cluster.</p>
+
+<p>In your microservice.yaml you can provide the SC IP of both the instance or any one instance, sdk can auto-discover other instances and use the other instances to get microservice details in case of failure of the first one.</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s2">"</span><span class="s">http://10.12.0.1:30100,http://10.12.0.2:30100"</span>
+      <span class="na">autodiscovery</span><span class="pi">:</span> <span class="no">true</span>
+</code></pre></div></div>
+<p>In this case sdk will be able to discover all the instances of SC in cluster.</p>
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+    <meta itemprop="headline" content="Service Using API Definitions">
+    <meta itemprop="description" content="Service Using API Definitions">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Service Using API Definitions
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#scenario" id="markdown-toc-scenario">Scenario</a></li>
+  <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a>    <ul>
+      <li><a href="#manually-configuring-service-api-definition" id="markdown-toc-manually-configuring-service-api-definition">Manually Configuring Service API Definition</a></li>
+      <li><a href="#automatically-downloading-api-definition-from-service-center" id="markdown-toc-automatically-downloading-api-definition-from-service-center">Automatically Downloading API Definition from Service Center</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="scenario">Scenario</h2>
+
+<p>When a consumer calls a service from a provider, you need to register a service API definition. You can obtain service API definition from your provider for your consumer in two ways. One is to obtain the service API definition from the provider off-line and manually configure the API definition to the project. Another is to automatically download the service API definition from the service center.</p>
+
+<h2 id="configuration">Configuration</h2>
+
+<blockquote>
+  <p>You can obtain service API definition in either way, regardless of the development mode of service consumers.</p>
+</blockquote>
+
+<p>In the microservice.yaml file, configure a provider for the consumer. The following is an example of the configuration:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="c1"># other configurations omitted</span>
+  <span class="na">references</span><span class="pi">:</span>
+    <span class="na">springmvc</span><span class="pi">:</span>
+      <span class="na">version-rule</span><span class="pi">:</span> <span class="s">0.0.1</span>
+</code></pre></div></div>
+
+<blockquote>
+  <p>There are four kind of rule for version-rule:</p>
+
+  <ul>
+    <li>Accurate Matching Rule: such as <code class="highlighter-rouge">version-rule: 0.0.1</code>, it indicates that only those  providers whose version is 0.0.1 can be matched.</li>
+    <li>Later Matching Rule: such as <code class="highlighter-rouge">version-rule: 1.0.0+</code>, it indicates that those providers whose version is later that 1.0.0 can be matched.</li>
+    <li>Latest Matching Rule: such as <code class="highlighter-rouge">version-rule: latest</code>, it indicates that only  those providers whose version number is latest can be matched.</li>
+    <li>Range Matching Rule: such as<code class="highlighter-rouge">1.0.0-2.0.2</code>,  it indicates that those provider whose version number is between 1.0.0 and 2.0.2 can be matched, including 1.0.0 and 2.0.2</li>
+  </ul>
+
+  <p>The default version rule of version-rule is <code class="highlighter-rouge">latest</code>.</p>
+</blockquote>
+
+<h3 id="manually-configuring-service-api-definition">Manually Configuring Service API Definition</h3>
+
+<p>After you obtained the API definition of your consumer from the provider, configure it in a specified directory of the consumer project. The directory is the one mentioned in the configuration description <a href="/users/service-contract/">Service Contract</a>.</p>
+
+<p>Each directory under the microservices directory indecates a microservice, and each .yaml file under the jaxrs directory represents a schema API definition. The file name is the schema ID. The service API definitions whose application IDs need to be specified are stored under the applications directory for cross-application calls. The directory structure is as follows:</p>
+<pre><code class="language-txt">resources
+  - microservices
+      - serviceName            # Microservice name
+          - schemaId.yaml      # Schema API definition
+  - applications
+      - appId                  # Application ID
+          - serviceName        # Microservice name
+              - schemaId.yaml  # Schema API definition
+</code></pre>
+
+<h3 id="automatically-downloading-api-definition-from-service-center">Automatically Downloading API Definition from Service Center</h3>
+
+<p>If a consumer does not explicitly store the API definition in the project directory, when the application is started, the ServiceComb framework automatically downloads the information about the API definition from the service center based on the provider’s microservices name and version configured in microservice.yaml.</p>
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content/docs/users/use-tls/index.html

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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Using TLS for Communication">
+    <meta itemprop="description" content="Using TLS for Communication">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Using TLS for Communication
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="scenario">Scenario</h2>
+
+<p>Users can use simple configurations to enable TLS communication to ensure data transmission security.</p>
+
+<h2 id="external-service-communication-configuration">External Service Communication Configuration</h2>
+
+<p>The configuration related to external service  communication is set in the microservice.yaml file.</p>
+
+<ul>
+  <li>
+    <p>TLS communication configuration of the service center and configuration center
+ The connection between the microservice and the service and configuration centers can be changed from HTTP to HTTPS, enabling TLS communication. The configuration example is as below:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">service</span><span class="pi">:</span>
+     <span class="na">registry</span><span class="pi">:</span>
+       <span class="na">address</span><span class="pi">:</span> <span class="s">https://127.0.0.1:30100</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p>TLS communication enabled by the service provider
+ When configuring the service listening address, the service provider can add<code class="highlighter-rouge">?sslEnabled=true</code> to the end of the address to enable TLS communication. For example:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code> <span class="na">servicecomb</span><span class="pi">:</span>
+   <span class="na">rest</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080?sslEnabled=true</span>
+   <span class="na">highway</span><span class="pi">:</span>
+     <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070?sslEnabled=true</span>
+</code></pre></div>    </div>
+  </li>
+</ul>
+
+<h2 id="configure-a-certificate">Configure a Certificate</h2>
+
+<p>The certificate configuration items are set in the microservice.yaml file. You can customize certificates in a unified manner or add tags for configuration in a small granularity. The tag configuration overwrites the global configuration, and the configuration format is as follows:</p>
+
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="s">ssl.[tag].[property]</span>
+</code></pre></div></div>
+
+<p>For details about the certificate configuration items, see Table 1.</p>
+
+<p><strong>Table 1 Certificate configuration items</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">ssl.protocols</td>
+      <td style="text-align: left">TLSv1.2</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the protocol list.</td>
+      <td style="text-align: left">Use commas (,) to separate protocols.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.ciphers</td>
+      <td style="text-align: left">TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,<br />TLS_RSA_WITH_AES_128_GCM_SHA256</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the algorithm list</td>
+      <td style="text-align: left">Use commas (,) to separate protocols.</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.authPeer</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies whether auhentication is required for the peer end.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.checkCN.host</td>
+      <td style="text-align: left">true</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Whether the CN of the certificate is checked</td>
+      <td style="text-align: left">This configuration item is available and valid only for consumers using the HTTP protocol (the rest channel). This parameter is invalid for providers and highway channels. The purpose of checking CN is to protect the server from phishing attacks. For details, see the following standard:<a href="https://tools.ietf.org/html/rfc2818。">https://tools.ietf.org/html/rfc2818。</a></td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.trustStore</td>
+      <td style="text-align: left">trust.jks</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the trust certificate file.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.trustStoreType</td>
+      <td style="text-align: left">JKS</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the type of trust certificate</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.trustStoreValue</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the password of the  trust certificate file.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.keyStore</td>
+      <td style="text-align: left">server.p12</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the identity certificate file.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.keyStoreType</td>
+      <td style="text-align: left">PKCS12</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the type of identity certificate.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.keyStoreValue</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the password of identity certificate.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.crl</td>
+      <td style="text-align: left">revoke.crl</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the certificate revocation list(CRL) file.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl.sslCustomClass</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">org.apache.servicecomb.foundation.ssl.SSLCustom implementation</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies implementation of the SSLCustom class, which is used by developers to convert passwords and file paths.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+  </tbody>
+</table>
+
+<blockquote>
+  <p><strong>NOTE:</strong></p>
+
+  <ul>
+    <li>The default protocol algorithm is high-strength algorithm. The JDK needs to be installed together withe the corresponding policy file. For details, visit <a href="http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html">http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html</a>. You can configure a non-high-strength algorithm in the configuration file.</li>
+    <li>The microservice consumers can specify certificates for different providers. (The current certificate is issued by HOST. Different providers use a certificate storage medium, which is used by the service center and configuration center).</li>
+  </ul>
+</blockquote>
+
+<h2 id="certificate-configuration-in-the-service-center">Certificate Configuration in the Service Center</h2>
+
+<p>Currently, the TLS authentication mode of the service center can be configured using environment variables. By default, TLS communication and bidirectional authentication are enables. During peer end authentication, whether the peer end matches the CommonName field of the certificate is checked. For details about the certificate configuration items in the service center, see table 2.</p>
+
+<p><strong>Table 2 Configuration file of the service center</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Item</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">CSE_SSL_MODE</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">1/0<br />0:HTTPS<br />1:HTTP</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Set the protocol mode.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">CSE_SSL_VERIFY_CLIENT</td>
+      <td style="text-align: left">1</td>
+      <td style="text-align: left">1/0<br />0:HTTPS<br />1:HTTP</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Set whether the peer end is authenticated in HTTPS mode</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">CSE_SSL_PASSPHASE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Set the password for the certificate key in HTTPS mode</td>
+      <td style="text-align: left">-</td>
+    </tr>
+  </tbody>
+</table>
+
+<p>The configuration file of the service center is$APP_ROOT/conf/app.conf. For details about the configuration item, see table 3. This configuration does not support the settings of environment variables.</p>
+
+<p>Table 3 Configuration file of the service center</p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Items</th>
+      <th style="text-align: left">Default Value</th>
+      <th style="text-align: left">Value Range</th>
+      <th style="text-align: left">Mandatory</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">ssl_protocols</td>
+      <td style="text-align: left">TLSv1.2</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the SSL version used for communication.</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">ssl_ciphers</td>
+      <td style="text-align: left">TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_RSA_WITH_AES_256_GCM_SHA384,<br />TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,<br />TLS_RSA_WITH_AES_128_GCM_SHA256,<br />TLS_RSA_WITH_AES_128_CBC_SHA</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">No</td>
+      <td style="text-align: left">Specifies the algorithms list used to configuration</td>
+      <td style="text-align: left">ssl_cipher must be configured with the TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 algorithm, because th eservice center supports the HTTP/2 protocal. TLS_RSA_WITH_AES_128_GCM_SHA256、TLS_RSA_WITH_AES_128_CBC_SHA are listd in the insecure algorithm blacklist of the HTTP/2 protocol, but they need to be configured to the last bit of ssl_ciphers to ensure compatibility of the client algorithm.</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="path-for-storing-key-materials-and-certificates">Path for Storing Key Materials and Certificates</h2>
+
+<p><strong>Table 4 Path for storing key materials and certificate</strong></p>
+
+<table>
+  <thead>
+    <tr>
+      <th style="text-align: left">Configuration Items</th>
+      <th style="text-align: left">Description</th>
+      <th style="text-align: left">Environment Variable</th>
+      <th style="text-align: left">Remarks</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td style="text-align: left">/</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">INSTALL_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/cipher</td>
+      <td style="text-align: left">Specifies the directory for storing key materials</td>
+      <td style="text-align: left">CIPHER_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl</td>
+      <td style="text-align: left">Specifies the directory for storing certificates.</td>
+      <td style="text-align: left">SSL_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/trust.cer</td>
+      <td style="text-align: left">Specifies the trusted CA.</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/server_key.pem</td>
+      <td style="text-align: left">Specifies the private key file on the encrypted server.</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/server.cer</td>
+      <td style="text-align: left">Specifies the server certificate.</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/etc/ssl/cert_pwd</td>
+      <td style="text-align: left">Specifies the symmetric ciphertext file used  to store the decrypted private key.</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps/ServiceCenter</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">APP_ROOT</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps/ServiceCenter/conf</td>
+      <td style="text-align: left">Specifies the configuration file directory of the service center.</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+    <tr>
+      <td style="text-align: left">/opt/CSE/apps/ServiceCenter/conf/app.conf</td>
+      <td style="text-align: left">Specifies the application configuration file.</td>
+      <td style="text-align: left">-</td>
+      <td style="text-align: left">-</td>
+    </tr>
+  </tbody>
+</table>
+
+<h2 id="sample-code">Sample Code</h2>
+
+<p>The configuration example of enabling the TLS communication in the microservicce.yaml file is as follows:</p>
+<div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">service</span><span class="pi">:</span>
+    <span class="na">registry</span><span class="pi">:</span>
+      <span class="na">address</span><span class="pi">:</span> <span class="s">https://127.0.0.1:30100</span>
+  <span class="na">rest</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:8080?sslEnabled=true</span>
+  <span class="na">highway</span><span class="pi">:</span>
+    <span class="na">address</span><span class="pi">:</span> <span class="s">0.0.0.0:7070?sslEnabled=true</span>
+
+<span class="c1">#########SSL options</span>
+<span class="s">ssl.protocols</span><span class="pi">:</span> <span class="s">TLSv1.2</span>
+<span class="s">ssl.authPeer</span><span class="pi">:</span> <span class="no">true</span>
+<span class="s">ssl.checkCN.host</span><span class="pi">:</span> <span class="no">true</span>
+
+<span class="c1">#########certificates config</span>
+<span class="s">ssl.trustStore</span><span class="pi">:</span> <span class="s">trust.jks</span>
+<span class="s">ssl.trustStoreType</span><span class="pi">:</span> <span class="s">JKS</span>
+<span class="s">ssl.trustStoreValue</span><span class="pi">:</span> <span class="s">Changeme_123</span>
+<span class="s">ssl.keyStore</span><span class="pi">:</span> <span class="s">server.p12</span>
+<span class="s">ssl.keyStoreType</span><span class="pi">:</span> <span class="s">PKCS12</span>
+<span class="s">ssl.keyStoreValue</span><span class="pi">:</span> <span class="s">Changeme_123</span>
+<span class="s">ssl.crl</span><span class="pi">:</span> <span class="s">revoke.crl</span>
+<span class="s">ssl.sslCustomClass</span><span class="pi">:</span> <span class="s">org.apache.servicecomb.demo.DemoSSLCustom</span>
+</code></pre></div></div>
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+            <h1 class="page__title" itemprop="headline">Huawei Cloud FAQ
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ol>
+  <li>
+    <p><strong>Q: When we push images to Huawei Public Cloud, what needs to be careful about the image tag?</strong></p>
+
+    <p>A:  It needs to be different with all uploaded images. As Docker does not pull image from remote every time it starts up a container. Hence, the Docker does not know whether the image updated or not. There are two solutions for this:</p>
+
+    <p>(1) Use different image tag every time you upload a image.</p>
+
+    <p>(2) Delete the image in the backend manually.</p>
+
+    <p>P.S. If you use the Huawei Cloud’s orchestration, you can avoid this by setting <em>imagePullPolicy</em> to <em>Always</em>.</p>
+  </li>
+  <li>
+    <p><strong>Q: We encountered this error when using Huawei Public Cloud: <em>WARN com.huaewi.paas.monitor.DataFactory: Upload monitor data error.</em> The configuration we use is as follows:</strong></p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">monitor</span><span class="pi">:</span>
+    <span class="na">handler</span><span class="pi">:</span>
+      <span class="na">chain</span><span class="pi">:</span>
+        <span class="na">Provider</span><span class="pi">:</span>
+          <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+</code></pre></div>    </div>
+
+    <p>A: There are mistakes in your configuration files. <code class="highlighter-rouge">handler</code> should be the child of <code class="highlighter-rouge">servicecomb</code> instead of <code class="highlighter-rouge">monitor</code>. The right configuration should be as follows:</p>
+
+    <div class="language-yaml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="na">servicecomb</span><span class="pi">:</span>
+  <span class="na">handler</span><span class="pi">:</span>
+    <span class="na">chain</span><span class="pi">:</span>
+      <span class="na">Provider</span><span class="pi">:</span>
+        <span class="na">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
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+    <meta itemprop="headline" content="FAQ">
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+    
+    <meta itemprop="dateModified" content="October 29, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">FAQ
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <ol>
+  <li>
+    <p><strong>Q: What need to be cautious when using Java-Chassis?</strong></p>
+
+    <p>A: There are a few restrictions when using Java-Chassis:</p>
+    <ul>
+      <li>Before version 0.3.0-SNAPSHOT, it does not support annotations like <code class="highlighter-rouge">@GetMapping</code>.</li>
+      <li>When using the same HTTP request method, e.g. GET, the method name need to be unique as it will become operation ID when swagger generates contracts.</li>
+      <li>Class and method name need to be public.</li>
+    </ul>
+  </li>
+  <li>
+    <p><strong>Q: When using the <em>spring-boot-starter-provider</em> dependency, property like <code class="highlighter-rouge">spring.main.web-environment</code> not working in <em>application.yml</em> file.</strong></p>
+
+    <p>A: When you need both the starter provider dependency and the servlet, you need to declare <code class="highlighter-rouge">spring.main.web-environment</code> in <em>application.properties</em> file or declare it in <em>application.yml</em> file and create an empty <em>application.properties</em> file.</p>
+  </li>
+  <li>
+    <p><strong>Q: What’s the dependency differences between gateway and other microservices?</strong></p>
+
+    <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;groupId&gt;</span>org.apache.servicecomb<span class="nt">&lt;/groupId&gt;</span>
+<span class="nt">&lt;artifactId&gt;</span>spring-boot-starter-provider<span class="nt">&lt;/artifactId&gt;</span>
+</code></pre></div>    </div>
+
+    <p>A: Gateway depends on not only the <code class="highlighter-rouge">spring-boot-starter-provider</code>, but also the <code class="highlighter-rouge">spring-boot-starter-discovery</code>. This can refer to the <em>manger</em> implementation of <a href="https://github.com/ServiceComb/LinuxCon-Beijing-WorkShop">LinuxCon-Beijing-Workshop</a>.</p>
+  </li>
+  <li>
+    <p><strong>Q: Do gateway need to configure assembly like the other microservices? Is <em>/maven/gateway</em> the default path of the docker maven plugin?</strong></p>
+
+    <p>A: Yes. Docker maven plugin relies on the assembly files to generate docker image. <em>/maven</em> is the default path of docker maven plugin and <em>/gateway</em> is the path defined in the assembly file.</p>
+  </li>
+  <li>
+    <p><strong>Q: Are there any restrictions of the return type of our API? Should it be the type of ResponseEntity?</strong></p>
+
+    <p>A: No, examples can refer to <a href="https://github.com/apache/servicecomb-java-chassis/blob/master/integration-tests/springmvc-tests/springmvc-tests-common/src/test/java/org/apache/servicecomb/demo/springmvc/tests/SpringMvcIntegrationTestBase.java">the implementation of integration-test</a> in java-chassis.</p>
+  </li>
+  <li>
+    <p><strong>Q: Our API can not be accessed after microservices are up. It just returns <em>404 Not Found</em>. The codes we use is as follows:</strong></p>
+
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RestController</span>
+<span class="nd">@RestSchema</span><span class="o">(</span><span class="n">schemaId</span> <span class="o">=</span> <span class="s">"worker"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">WorkerController</span> <span class="o">{</span>
+  <span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span><span class="o">=</span><span class="s">"/count"</span><span class="o">,</span> <span class="n">method</span><span class="o">=</span><span class="nc">RequestMethod</span><span class="o">.</span><span class="na">GET</span><span class="o">)</span>
+  <span class="kd">public</span> <span class="kt">int</span> <span class="nf">getWorkerNumbers</span><span class="o">()</span> <span class="o">{</span>
+    <span class="o">...</span>
+  <span class="o">}</span>
+<span class="o">}</span>
+</code></pre></div>    </div>
+
+    <p>A: Without specifying the base path, ServiceComb will use the classname as the base path. Hence, the path should be <code class="highlighter-rouge">/WorkerController/count</code> in the previous code. If you want to access path like <code class="highlighter-rouge">/count</code>, you need to specify base path as <code class="highlighter-rouge">/</code> as follows:</p>
+    <div class="language-java highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nd">@RequestMapping</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="s">"/"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span class="nc">WorkerController</span> <span class="o">{}</span>
+</code></pre></div>    </div>
+  </li>
+  <li>
+    <p><strong>Q: What's the default base path if I have not declared the value of RequestMapping annotation?</strong></p>
+
+    <p>A: Supposed the class name of your controller is <em>HelloController</em>, the base path is /HelloController.</p>
+  </li>
+</ol>
+
+        
+      </section>
+
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+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_faqs/faq.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
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+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
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+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
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+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
+        </li>
+      </ul>
+    </div>
+  </div>
+</div>
+<div class="page__footer-bottom">
+  <div>&copy; 2019 Apache ServiceComb. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>
+  <div>All other marks mentioned may be trademarks or registered trademarks of their respective owners.</div>
+</div>
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+  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
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+  </body>
+</html>

content/feed.xml

diff --git a/content/feed.xml b/content/feed.xml
new file mode 100644
index 0000000..7ffe720
--- /dev/null
+++ b/content/feed.xml
@@ -0,0 +1,980 @@
+<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="3.8.5">Jekyll</generator><link href="/feed.xml" rel="self" type="application/atom+xml" /><link href="/" rel="alternate" type="text/html" /><updated>2019-12-10T14:51:23+08:00</updated><id>/feed.xml</id><title type="html">Apache ServiceComb</title><subtitle>The homepage of ServiceComb</subtitle><author><name>{&quot;name&quot;=&gt;nil, &quot;avatar&quot;=&gt;&quot;/assets/images/ServiceComb-logo-3.jpg&quot;, &quot;bio&quot;=&gt;&quot;ServiceComb is a microservice framework that provides service registration, discovery, configuration and management utilities.&quot;, &quot;biocn&quot;=&gt;&quot;ServiceComb提供了一套关于服务注册，服务发现，服务配置以及管理功能的微服务框架&quot;, &quot;location&quot;=&gt;&quot;China&quot;, &quot;locationcn&quot;=&gt;&quot;中国&quot;, &quot;email&quot;=&gt;&quot;dev@servicecomb.apache.org&quot;, &quot;uri&quot;=&gt;nil, &quot;bitbucket&quot;=&gt;nil, &quot;codepen&quot;=&gt;nil, &quot;dribbble&quot;=&gt;nil, &quot;flickr&quot;=&gt;nil, &quot;facebook&quot;=&gt;nil, &quot;foursquare&quot;=&gt;nil, &quot;github&quot;=&gt;&quot;ServiceComb&quot;, &quot;google_plus&quot;=&gt;nil, &quot;keybase&quot;=&gt;nil, &quot;instagram&quot;=&gt;nil, &quot;lastfm&quot;=&gt;nil, &quot;linkedin&quot;=&gt;nil, &quot;pinterest&quot;=&gt;nil, &quot;soundcloud&quot;=&gt;nil, &quot;stackoverflow&quot;=&gt;nil, &quot;steam&quot;=&gt;nil, &quot;tumblr&quot;=&gt;nil, &quot;twitter&quot;=&gt;nil, &quot;vine&quot;=&gt;nil, &quot;weibo&quot;=&gt;nil, &quot;xing&quot;=&gt;nil, &quot;youtube&quot;=&gt;nil}</name><email>dev@servicecomb.apache.org</email></author><entry xml:lang="cn"><title type="html">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)</title><link href="/cn/docs/playing-on-the-open-source-community-with-Apache-ServiceComb-BUPT/" rel="alternate" type="text/html" title="与Apache ServiceComb一起玩开源-北邮站 (PPT Download)" /><published>2019-11-20T00:00:00+08:00</published><updated>2019-11-21T15:18:43+08:00</updated><id>/cn/docs/playing-on-the-open-source-community-with-Apache-ServiceComb-BUPT</id><content type="html" xml:base="/cn/docs/playing-on-the-open-source-community-with-Apache-ServiceComb-BUPT/">&lt;p&gt;近日，Apache ServiceComb与北京邮电大学“乐群学堂”联合举办“与Apache ServiceComb一起玩开源”讲座。Apache ServiceComb PMC成员马彬与华为开源软件架构师郑志鹏，为北邮的同学们带来“ServiceComb带你走进开源”和“使用ServiceComb快速开发高并发高可用电商系统实践使用微服务架构快速开发万级TPS高可用电商系统”的精彩演讲以及现场教学互动。&lt;/p&gt;
+
+&lt;p&gt;本次讲座得到北邮计算机学院闫博、徐飒等老师以及广大同学的鼎力支持和参与。报名通道开放伊始，原定200个的参会名额即被定满，经过老师们积极协调临时增加了部分名额，但是由于场地资源有限，这次没有报上名的同学，期待下次再会面啦&amp;gt;_&amp;lt;~~&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/1.signup.jpg&quot; alt=&quot;1&quot; /&gt; &lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/2.signup.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;讲座开展前期，同学们积极响应和回馈社区，ServiceComb通过建立社区交流群组，与同学互动交流，提前分享动手实践指南以及解答疑问。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/3.answer.jpg&quot; alt=&quot;1&quot; /&gt; &lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/4.answer.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;ul&gt;
+  &lt;li&gt;讲座定于19:00开始，18:10会场前同学已经在有序地排队入场，给北邮的同学点赞&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/5.enter.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;ul&gt;
+  &lt;li&gt;为“乐群学堂”的师生们点赞，非常贴心地在走廊安排了临时加座~~~&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/6.meeting.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主题 1: 《Apache ServiceComb带你走进开源开发》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20191120/Apache_ServiceComb.pdf&quot;&gt;中文PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;来自华为开源软件部的Apache ServiceComb PMC成员马彬为同学们分享了开源软件的演进历史、开源基金会介绍、开源社区以及基于首个Apache ServiceComb微服务项目的开源开发实战内容。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/7.meeting.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;主题 2: 《使用ServiceComb快速开发高并发高可用电商系统实践》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20191120/2.Apache_ServiceComb_builds_online_store.pdf&quot;&gt;中文PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;华为开源软件架构师郑志鹏为同学们普及了微服务的概念和作用，并从基于Apache ServiceComb构建的万级TPS高可用电商系统案例出发，现场“庖丁解牛”动手教学，讲解如何做微服务设计、如何合理拆分微服务、如何分库分表，以及如何使用Apache ServiceComb的核心能力实现微服务快速开发、部署、上线等精彩内容。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/8.meeting.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;会后，同学们踊跃发言，与讲师就开源、微服务、个人职业发展等问题进行了开放式的交流，收获满满~&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/9.meeting.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/colleges_and_universities/BUPT/10.meeting.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;关于Apache ServiceComb 项目&lt;/strong&gt;：&lt;/p&gt;
+
+&lt;p&gt;ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;如您对开源开发、微服务感兴趣，欢迎微信扫码添加“ServiceComb小助手”，咱们一起做点有意思的事情&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/QRcode.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;</content><author><name>Chinx</name></author><category term="microservice" /><category term="Meetup" /><summary type="html">与Apache ServiceComb一起玩开源-北邮站 (PPT Download)</summary></entry><entry xml:lang="en"><title type="html">Apache ServiceComb Accept Code Donation From NewCapec Institute</title><link href="/docs/servicecomb-accept-newcapec-institute-code-donation/" rel="alternate" type="text/html" title="Apache ServiceComb Accept Code Donation From NewCapec Institute" /><published>2019-11-07T00:00:00+08:00</published><updated>2019-11-07T09:24:43+08:00</updated><id>/docs/servicecomb-accept-newcapec-institute-code-donation</id><content type="html" xml:base="/docs/servicecomb-accept-newcapec-institute-code-donation/">&lt;p&gt;&lt;a href=&quot;https://github.com/apache/servicecomb-toolkit&quot;&gt;ServiceComb Toolkit&lt;/a&gt; recently recieved a code donation(&lt;a href=&quot;https://github.com/NewCapec-Institute/oas-validator&quot;&gt;oas-validator&lt;/a&gt;) from &lt;a href=&quot;https://github.com/orgs/NewCapec-Institute/dashboard&quot;&gt;NewCapec Institute&lt;/a&gt;, oas-validator provides OpenAPI V3 style and compatiblity check functionalities。Related links：&lt;/p&gt;
+
+&lt;ul&gt;
+  &lt;li&gt;&lt;a href=&quot;https://lists.apache.org/thread.html/062cf6e67add1061aad3b106543842a8ac95959da8cd45bf2f88d597@%3Cdev.servicecomb.apache.org%3E&quot;&gt;Donation acceptance vote&lt;/a&gt;&lt;/li&gt;
+  &lt;li&gt;&lt;a href=&quot;https://incubator.apache.org/ip-clearance/servicecomb-oas-validator.html&quot;&gt;IP Clearance Status&lt;/a&gt;&lt;/li&gt;
+  &lt;li&gt;&lt;a href=&quot;https://github.com/apache/servicecomb-toolkit/pull/40&quot;&gt;Code import PR&lt;/a&gt;&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;p&gt;ServiceComb community will complete the integration work as soon as possible, provide more helpful functionalities to developers.&lt;/p&gt;</content><author><name>Qian Jia</name><email>chanjarster@gmail.com</email><uri>https://github.com/chanjarster</uri></author><category term="microservice" /><summary type="html">Apache ServiceComb Accept Code Donation From NewCapec Institute</summary></entry><entry xml:lang="cn"><title type="html">Apache ServiceComb社区接受新开普软件研究院的代码捐赠</title><link href="/cn/docs/servicecomb-accept-newcapec-institute-code-donation/" rel="alternate" type="text/html" title="Apache ServiceComb社区接受新开普软件研究院的代码捐赠" /><published>2019-10-29T00:00:00+08:00</published><updated>2019-10-29T10:24:43+08:00</updated><id>/cn/docs/servicecomb-accept-newcapec-institute-code-donation</id><content type="html" xml:base="/cn/docs/servicecomb-accept-newcapec-institute-code-donation/">&lt;p&gt;&lt;a href=&quot;https://github.com/apache/servicecomb-toolkit&quot;&gt;ServiceComb Toolkit&lt;/a&gt;项目收到来自&lt;a href=&quot;https://github.com/orgs/NewCapec-Institute/dashboard&quot;&gt;新开普软件研究院&lt;/a&gt;捐赠的&lt;a href=&quot;https://github.com/NewCapec-Institute/oas-validator&quot;&gt;OAS Validator&lt;/a&gt;，该工具提供OpenAPI V3合规性检查和兼容性校验等能力。相关链接：&lt;/p&gt;
+
+&lt;ul&gt;
+  &lt;li&gt;&lt;a href=&quot;https://lists.apache.org/thread.html/062cf6e67add1061aad3b106543842a8ac95959da8cd45bf2f88d597@%3Cdev.servicecomb.apache.org%3E&quot;&gt;社区接受捐赠投票&lt;/a&gt;&lt;/li&gt;
+  &lt;li&gt;&lt;a href=&quot;https://incubator.apache.org/ip-clearance/servicecomb-oas-validator.html&quot;&gt;IP Clearance Status&lt;/a&gt;&lt;/li&gt;
+  &lt;li&gt;&lt;a href=&quot;https://github.com/apache/servicecomb-toolkit/pull/40&quot;&gt;代码导入PR&lt;/a&gt;&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;p&gt;后续社区将尽快完成整合工作，给广大开发者提供更多帮助。&lt;/p&gt;</content><author><name>Qian Jia</name><email>chanjarster@gmail.com</email><uri>https://github.com/chanjarster</uri></author><category term="微服务" /><summary type="html">Apache Servicecomb社区接受新开普软件研究院的代码捐赠</summary></entry><entry xml:lang="cn"><title type="html">使用OAS Validator帮助你规范OpenAPI Spec文档</title><link href="/cn/docs/use-oas-validator-help-standardize-oas-spec/" rel="alternate" type="text/html" title="使用OAS Validator帮助你规范OpenAPI Spec文档" /><published>2019-10-23T00:00:00+08:00</published><updated>2019-10-23T12:37:43+08:00</updated><id>/cn/docs/use-oas-validator-help-standardize-oas-spec</id><content type="html" xml:base="/cn/docs/use-oas-validator-help-standardize-oas-spec/">&lt;h2 id=&quot;使用oas-validator规范你的openapi-spec文档&quot;&gt;使用OAS Validator规范你的OpenAPI Spec文档&lt;/h2&gt;
+
+&lt;p&gt;当前主流的开发RESTful API的做法有两种：Code First和Contract First。Code First指先写代码，然后生成Contract，而Contract First则是先写Contract再写代码实现。&lt;/p&gt;
+
+&lt;p&gt;两种做法各有利弊，Code First可以让开发人员先写接口实现，然后利用工具反向生成Contract，优点是快速开发，并能保证接口实现与Contract保证一致，缺点是Contract太过易变容易导致下游应用故障。Contract First则可以让Contract的变动受控，保证下游应用的稳定性，缺点是需要人工来保证接口实现与Contact的一致性，具有一定难度。&lt;/p&gt;
+
+&lt;p&gt;对于如何规范管理Contract，新开普软件研究院开源的&lt;a href=&quot;https://github.com/NewCapec-Institute/oas-validator&quot;&gt;OAS Validator[1]&lt;/a&gt;提供了一些思路，下面简单介绍。&lt;/p&gt;
+
+&lt;h3 id=&quot;合规性校验&quot;&gt;合规性校验&lt;/h3&gt;
+
+&lt;p&gt;OAS Validator支持对使用&lt;a href=&quot;https://github.com/OAI/OpenAPI-Specification&quot;&gt;OpenAPI V3[2]&lt;/a&gt;编写的Contract文档做合规性校验（也可称之为风格校验）。&lt;/p&gt;
+
+&lt;p&gt;在一个微服务架构的系统中，提供RESTful API的组件可能会有很多个，并且由不同开发人员/团队开发，那么在使用这些接口的时候有一个很自然的需求就是希望这些接口（或接口文档）的风格是一致的。OAS Validator的合规性校验做的就是这部分工作。下面举例说明怎么使用合规性校验功能：&lt;/p&gt;
+
+&lt;ol&gt;
+  &lt;li&gt;到 https://github.com/NewCapec-Institute/oas-validator clone下代码&lt;/li&gt;
+  &lt;li&gt;然后 &lt;code class=&quot;highlighter-rouge&quot;&gt;mvn clean install&lt;/code&gt;打包&lt;/li&gt;
+  &lt;li&gt;到&lt;code class=&quot;highlighter-rouge&quot;&gt;oas-validator-web/target&lt;/code&gt;目录下执行&lt;code class=&quot;highlighter-rouge&quot;&gt;java -jar oas-validator-web-exec.jar&lt;/code&gt;启动OAS Validator Web&lt;/li&gt;
+  &lt;li&gt;访问 http://localhost:8080，进入合规性校验功能&lt;/li&gt;
+  &lt;li&gt;把 &lt;a href=&quot;https://github.com/OAI/OpenAPI-Specification/blob/master/examples/v3.0/petstore.yaml&quot;&gt;petstore.yaml&lt;/a&gt; 内容贴到文本框中然后点击校验得到结果：&lt;/li&gt;
+&lt;/ol&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;$.tags : 至少提供一个
+$.openapi : 必须&amp;gt;=3.0.2
+$.components.schemas.'Pet'.title : 必须提供
+$.components.schemas.'Pet'.properties.'id'.title : 必须提供
+$.components.schemas.'Pet'.properties.'name'.title : 必须提供
+$.components.schemas.'Pet'.properties.'tag'.title : 必须提供
+$.components.schemas.'Error'.title : 必须提供
+$.components.schemas.'Error'.properties.'code'.title : 必须提供
+$.components.schemas.'Error'.properties.'message'.title : 必须提供
+$.info.description : 必须提供
+$.paths./pets.get.tags[0] : 不在$.tags所定义的范围内
+$.paths./pets.get.responses.200.headers.'x-next' : 必须为upper hyphen case
+$.paths./pets.post.tags[0] : 不在$.tags所定义的范围内
+$.paths./pets/{petId}.get.tags[0] : 不在$.tags所定义的范围内
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;下面是功能截图：&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/2019-10-23-use-oas-validator-help-standardize-oas-spec/oas-validator-1.png&quot; alt=&quot;图1 合规性校验&quot; class=&quot;align-center&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;下面举例解释检查报告的意思：&lt;/p&gt;
+
+&lt;p&gt;&lt;code class=&quot;highlighter-rouge&quot;&gt;$.components.schemas.'Pet'.title : 必须提供&lt;/code&gt;，前面一段是&lt;a href=&quot;https://github.com/json-path/JsonPath&quot;&gt;JsonPath[3]&lt;/a&gt;，用来描述出问题的元素/属性的位置，“必须提供”则的意思是没有填写该属性。如下图：&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/2019-10-23-use-oas-validator-help-standardize-oas-spec/oas-validator-2.png&quot; alt=&quot;图2 合规性校验示例&quot; class=&quot;align-center&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;code class=&quot;highlighter-rouge&quot;&gt;title&lt;/code&gt;是一个文档性字段，没有它虽然不影响接口的语义，但是对于下游应用的开发者来说没有它会造成理解上的困难，因此在这里我们把它设定为必填。&lt;/p&gt;
+
+&lt;p&gt;再来看这一条报告 &lt;code class=&quot;highlighter-rouge&quot;&gt;$.paths./pets.get.responses.200.headers.'x-next' : 必须为upper hyphen case&lt;/code&gt;，同样前面是JsonPath，告诉你该属性应该为Upper Hyphen Case，正确的写法应该是&lt;code class=&quot;highlighter-rouge&quot;&gt;X-Next&lt;/code&gt;。和&lt;code class=&quot;highlighter-rouge&quot;&gt;title&lt;/code&gt;属性一样Header的大小写不是一个技术问题，但是统一的大小写风格能够让下游应用的开发人员更舒适，从而有更少的Bug。&lt;/p&gt;
+
+&lt;h3 id=&quot;兼容性校验&quot;&gt;兼容性校验&lt;/h3&gt;
+
+&lt;p&gt;不管你是采用Code First还是Contract First，Contract的变动不可避免，那么如何保证变化后的Contract能够对下游应用向下兼容就成了不可回避的问题。这个问题的具体描述就是根据V1.0 Contract开发的下游应用是否依然能够与根据V1.1 Contract实现的接口正确交互。&lt;/p&gt;
+
+&lt;p&gt;OAS Validator提供了这种兼容性校验，当然同样只支持OpenAPI V3文档。下面举例说明如何使用这一功能：&lt;/p&gt;
+
+&lt;p&gt;我们先提供一个v1.0的OAS Spec：&lt;/p&gt;
+
+&lt;div class=&quot;language-yaml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;na&quot;&gt;openapi&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;3.0.0&quot;&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;info&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;version&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;m&quot;&gt;1.0&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;title&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;Swagger Petstore&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;paths&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;s&quot;&gt;/pets/{petId}&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+    &lt;span class=&quot;na&quot;&gt;get&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;operationId&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;showPetById&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;tags&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;pets&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;parameters&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;na&quot;&gt;name&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;petId&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;in&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;path&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;required&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;no&quot;&gt;true&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;schema&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+            &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;string&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;responses&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;s1&quot;&gt;'&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;200'&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;description&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;Expected response to a valid request&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;content&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+            &lt;span class=&quot;s&quot;&gt;application/json&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+              &lt;span class=&quot;na&quot;&gt;schema&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+                &lt;span class=&quot;s&quot;&gt;$ref&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;#/components/schemas/Pet&quot;&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;components&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;schemas&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+    &lt;span class=&quot;na&quot;&gt;Pet&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;object&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;required&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;id&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;name&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;properties&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;na&quot;&gt;id&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;integer&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;format&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;int64&lt;/span&gt;
+        &lt;span class=&quot;na&quot;&gt;name&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;string&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;再写一个v1.1的OAS Spec，添加了一个query参数&lt;code class=&quot;highlighter-rouge&quot;&gt;name&lt;/code&gt;：&lt;/p&gt;
+
+&lt;div class=&quot;language-yaml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;na&quot;&gt;openapi&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;3.0.0&quot;&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;info&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;version&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;m&quot;&gt;1.1&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;title&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;Swagger Petstore&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;paths&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;s&quot;&gt;/pets/{petId}&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+    &lt;span class=&quot;na&quot;&gt;get&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;operationId&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;showPetById&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;tags&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;pets&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;parameters&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;na&quot;&gt;name&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;petId&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;in&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;path&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;required&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;no&quot;&gt;true&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;schema&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+            &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;string&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;na&quot;&gt;name&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;name&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;in&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;query&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;required&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;no&quot;&gt;true&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;schema&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+            &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;string&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;responses&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;s1&quot;&gt;'&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;200'&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;description&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;Expected response to a valid request&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;content&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+            &lt;span class=&quot;s&quot;&gt;application/json&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+              &lt;span class=&quot;na&quot;&gt;schema&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+                &lt;span class=&quot;s&quot;&gt;$ref&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s2&quot;&gt;&quot;&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;#/components/schemas/Pet&quot;&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;components&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;schemas&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+    &lt;span class=&quot;na&quot;&gt;Pet&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;object&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;required&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;id&lt;/span&gt;
+        &lt;span class=&quot;pi&quot;&gt;-&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;name&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;properties&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+        &lt;span class=&quot;na&quot;&gt;id&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;integer&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;format&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;int64&lt;/span&gt;
+        &lt;span class=&quot;na&quot;&gt;name&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+          &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;string&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;然后同样打开OAS Validator Web，进入“兼容性校验”功能，在左侧贴上v1.0在右侧贴上v1.1，点击校验得到结果：&lt;/p&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;$.paths./pets/{petId}.get.parameters[1].required : [name=name,in=query]:仅允许新增required=false的parameter
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;这个报告的意思是新增的query参数&lt;code class=&quot;highlighter-rouge&quot;&gt;name&lt;/code&gt;是必填的，这种做法不向下兼容。仔细想想是不是的确如此？&lt;/p&gt;
+
+&lt;h3 id=&quot;总结&quot;&gt;总结&lt;/h3&gt;
+
+&lt;p&gt;关于OAS Validator的详细文档可见Github。需要注意的是，目前校验规则还不能配置，但是在代码层面提供了接口供扩展，你可以根据自己的需求写一个自己的合规性校验器。&lt;/p&gt;
+
+&lt;p&gt;同时OAS Validator正在请求捐赠到&lt;a href=&quot;https://github.com/apache/servicecomb-toolkit&quot;&gt;Servicecomb Toolkit[4]&lt;/a&gt;项目，流程结束后会尽快将其整合到Servicecomb Toolkit中希望能够为广大开发者带来帮助。&lt;/p&gt;
+
+&lt;p&gt;最后，欢迎开发者朋友们加入ServiceComb社区，一起做些有意思的事情。&lt;a href=&quot;http://servicecomb.incubator.apache.org/cn/docs/join_the_community/&quot;&gt;加入社区方法[5]&lt;/a&gt;&lt;/p&gt;
+
+&lt;h3 id=&quot;参考资料&quot;&gt;参考资料&lt;/h3&gt;
+
+&lt;p&gt;[1] OAS Validator https://github.com/NewCapec-Institute/oas-validator&lt;/p&gt;
+
+&lt;p&gt;[2] OpenAPI V3 https://github.com/OAI/OpenAPI-Specification&lt;/p&gt;
+
+&lt;p&gt;[3] JsonPath https://github.com/json-path/JsonPath&lt;/p&gt;
+
+&lt;p&gt;[4] Servicecomb Toolkit https://github.com/apache/servicecomb-toolkit&lt;/p&gt;
+
+&lt;p&gt;[5] 加入Servicecomb社区  http://servicecomb.incubator.apache.org/cn/docs/join_the_community/&lt;/p&gt;</content><author><name>Qian Jia</name><email>chanjarster@gmail.com</email><uri>https://github.com/chanjarster</uri></author><category term="微服务" /><summary type="html">本文将介绍如何规范你的OpenAPI Spec文档</summary></entry><entry xml:lang="en"><title type="html">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)</title><link href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="alternate" type="text/html" title="Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)" /><published>2019-09-20T00:00:00+08:00</published><updated>2019-09-23T17:18:43+08:00</updated><id>/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report</id><content type="html" xml:base="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/">&lt;p&gt;On September 20, 2019, at the Shanghai World Expo Center in China, the Apache ServiceComb community held microservice Co-Located event at the HUAWEI CONNECT 2019, that concluded successfully.&lt;/p&gt;
+
+&lt;p&gt;The event invited the chairman of the Apache Foundation, the chairman of the Apache Incubator Project Management Committee, Apache Member, Apache Committer, and Huawei Cloud PaaS team architect. They shared the “Apache Explained”, “The Apache Incubator”, “ServiceComb Incubating Journey”, “Apache ServiceComb-Innovative Microservices”, “HUAWEI CLOUD Microservice Tool Improves Development Efficiency”, etc. Many micro-service technologies and experience. ServiceComb community has also released a series of innovative new projects to assist user solve pain points of microservice.&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Session 1: The Apache Way&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;The Apache Software Foundation is the world’s largest open source foundation and currently has more than 300 open source projects covering big data, cloud computing, server and web frameworks, build management, content management, and the Internet of Things. Foundation members introduced the Apache Software Foundation, open source community governance principles, and the operating mechanism of the Apache incubator, and shared the Apache project’s successful incubation experience with Huawei-funded project Apache ServiceComb.&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20190920/EN/The_Apache_Way_En.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/apache.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Apache Explained&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Craig Russell, Chairman of the ASF, Apache Software Foundation:&lt;/strong&gt; A detailed introduction to the history and current state of the Apache Foundation and its core principles.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/introduction.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;The Apache Incubator&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Justin Mclean, Chairman of the Apache IPMC, Apache Software Foundation:&lt;/strong&gt;  Explains the operating mechanism of the Apache incubator and the features of the Apache protocol, and the release process for the Apache project.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/process.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;ServiceComb Incubating Journey&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Willem Jiang, Huawei Open Source Expert, ASF Member:&lt;/strong&gt; Shared the practical experience of Huawei’s donated Apache ServiceComb successful incubation, and gave its own summary and suggestions on how to better develop the open source community.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/incubation.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;Session 2: Innovative Microservices for More Efficient Development&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;The Apache ServiceComb community has listened carefully to the pain points encountered by users implementing the microservices architecture. The first half of this topic will share these pain points and incubate projects to solve some pain points. I hope to discuss with users how to solve the problems in micro-service practice. The second half of this topic will introduce the micro-service tool innovation practices that work hand-in-hand with users.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/servicecomb.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Apache ServiceComb-Innovative Microservices&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20190920/EN/Apache_ServiceComb-Innovative_Microservices.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Ma Bin, Huawei Open Source Architect, Apache Committer:&lt;/strong&gt; Interpret the innovative project architecture, roadmap and scenario cases launched by the ServiceComb community for user pain points, including: multi-language operating environment, micro-service contract tools, heterogeneous communication in service centers, distributed configuration centers, micro-service authentication; The convening order calls for more interested fans to contribute to the open source community.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/innovative.jpg&quot; alt=&quot;2&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+
+&lt;p&gt;&lt;strong&gt;HUAWEI CLOUD Microservice Tool Improves Development Efficiency&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20190920/EN/HUAWEI_CLOUD_Microservice_Tool_Improves_Development_Efficiency.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Wang Qijun, Huawei Cloud PaaS Architect:&lt;/strong&gt; Based on the practice of ServiceComb, Huawei Cloud Micro Service shared the micro-service splitting tools and contract management tools, which are the two developers/users with the highest attention.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/efficiency.jpg&quot; alt=&quot;4&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+
+&lt;p&gt;&lt;strong&gt;About the Apache ServiceComb&lt;/strong&gt;：&lt;/p&gt;
+
+&lt;p&gt;Apache ServiceComb, the main code of the Apache Software Foundation Incubation Project, donated by Huawei Cloud, is dedicated to helping enterprises easily build cloud native applications and traditional enterprise business rapid micro-services, helping users quickly develop micro-services through a series of solutions to achieve these Efficient operation and maintenance management of microservice applications. It has a complete micro-service ecological stack, no vendor lock-in, currently incubating with Apache Way, and has a number of non-Huawei commercial users outside of Huawei’s business such as consumer cloud, cloud EI, cloud security, cloud core, and community. And developers are also increasingly diverse.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;more questions, welcome to scan the QR code or WeChat to add “ServiceComb Assistant&lt;/strong&gt;
+&lt;img src=&quot;/assets/images/QRcode.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;</content><author><name>Mabin</name></author><category term="microservice" /><category term="Meetup" /><summary type="html">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)</summary></entry><entry xml:lang="cn"><title type="html">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)</title><link href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="alternate" type="text/html" title="Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)" /><published>2019-09-20T00:00:00+08:00</published><updated>2019-09-23T17:18:43+08:00</updated><id>/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report</id><content type="html" xml:base="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/">&lt;p&gt;北京时间2019年09月20日，Apache ServiceComb社区在中国上海世博中心举办的华为全链接大会组织了微服务同场活动 Apache ServiceComb Meetup，并圆满落下帷幕。&lt;/p&gt;
+
+&lt;p&gt;本次活动邀请了Apache基金会主席、Apache孵化器项目管理委员会主席、Apache Member、Apache Committer、华为云PaaS团队架构师，携手为大家分享了Apache基金会介绍、Apache 孵化器的运作、ServiceComb的Apache孵化之路分享、Apache ServiceComb：微服务创新项目解读、华为云微服务工具解放开发者等诸多微服务技术及经验，ServiceComb社区也重磅发布了一系列解决用户应用微服务化痛点的创新新品。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Session 1: 《Apache软件基金会开源开发详解》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;Apache软件基金会是全球最大的开源基金会，目前拥有300多个开源项目，涵盖大数据、云计算、服务器和Web框架、构建管理、内容管理、物联网等众多领域。基金会成员介绍了Apache软件基金会，开源社区治理原则，以及Apache孵化器的运作机制，并以华为捐赠的Apache ServiceComb孵化经历，分享Apache项目的孵化成功经验。&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20190920/The_Apache_Way_En.pdf&quot;&gt;中文PDF下载&lt;/a&gt;  &lt;a href=&quot;/assets/slides/20190920/EN/The_Apache_Way_En.pdf&quot;&gt;英文PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/apache.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;《Apache基金会介绍》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Craig Russell, Apache基金会主席：&lt;/strong&gt; 详细的介绍的Apache基金会的历史和现状及核心原则。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/introduction.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Justin Mclean, Apache孵化器项目管理委员会主席：&lt;/strong&gt; 详解了Apache孵化器的运作机制以及Apache协议的特点，Apache项目的发布流程。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;《Apache 孵化器的运作》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/process.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;姜宁，华为开源软件部技术专家，Apache软件基金会会员：&lt;/strong&gt; 分享了华为捐赠的Apache ServiceComb成功孵化的实战经验，并对如何更好的发展开源社区给出了自己的总结和建议。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;《ServiceComb的Apache孵化之路》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/incubation.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;Session 2: 《庖丁解牛： 微服务创新实践解放开发者》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;Apache ServiceComb社区认真的听取了用户实施微服务架构中遇到的痛点。本主题前半部分将和大家分享这些获取到的痛点和为解决部分痛点而孵化项目，期望与用户一起思考如何去摆平微服务化实践中的难题。本主题后半部分将介绍与用户携手实践出真知的微服务化工具创新实践。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/servicecomb.jpg&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;《Apache ServiceComb：微服务创新项目解读》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20190920/Apache_ServiceComb-Innovative_Microservices.pdf&quot;&gt;中文PDF下载&lt;/a&gt;  &lt;a href=&quot;/assets/slides/20190920/EN/Apache_ServiceComb-Innovative_Microservices.pdf&quot;&gt;英文PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;马彬，华为开源软件部架构师，Apache Committer：&lt;/strong&gt; 解读ServiceComb社区针对用户痛点所推出的创新项目架构、roadmap及场景案例，包括:多语言运行环境、微服务契约工具、服务中心异构通信、分布式配置中心、微服务鉴权；同时向社区发出召集令，号召更多的兴趣爱好者投入开源社区贡献。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/innovative.jpg&quot; alt=&quot;2&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+
+&lt;p&gt;&lt;strong&gt;《华为云微服务工具解放开发者》&lt;/strong&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;a href=&quot;/assets/slides/20190920/HUAWEI_CLOUD_Microservice_Tool_Improves_Development_Efficiency.pdf&quot;&gt;中文PDF下载&lt;/a&gt;  &lt;a href=&quot;/assets/slides/20190920/EN/HUAWEI_CLOUD_Microservice_Tool_Improves_Development_Efficiency.pdf&quot;&gt;英文PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;王启军, 华为云PaaS团队架构师：&lt;/strong&gt; 华为云微服务基于ServiceComb的实践，通过案例分享了微服务拆分工具，契约管理工具这2个开发者/用户关注度最高的微服务工具。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/hc2019/efficiency.jpg&quot; alt=&quot;4&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+
+&lt;p&gt;&lt;strong&gt;关于Apache ServiceComb 项目&lt;/strong&gt;：&lt;/p&gt;
+
+&lt;p&gt;ServiceComb Apache软件基金会孵化项目的主体代码由华为云捐赠，致力于帮助企业轻松构建云原生应用及传统企业业务快速微服务化，通过系列解决方案帮助用户快速开发微服务的同时实现对这些微服务应用的高效运维管理。它具有完整的微服务生态栈，无厂商锁定，当前遵循Apache Way进行孵化，已拥有如消费者云、云EI、云安全、云核等华为业务之外的一批非华为商用用户，且社区和开发者也日趋多样化。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;如您有更多问题关于Aapche ServiceComb，欢迎您扫码或微信添加“ServiceComb小助手”，我们将认真对待您的每一个问题&lt;/strong&gt;
+&lt;img src=&quot;/assets/images/QRcode.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;</content><author><name>Dean Lee</name></author><category term="microservice" /><category term="Meetup" /><summary type="html">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)</summary></entry><entry xml:lang="cn"><title type="html">如何给微服务架构的项目做验收测试？</title><link href="/cn/docs/how-to-do-microservice-accept-test/" rel="alternate" type="text/html" title="如何给微服务架构的项目做验收测试？" /><published>2019-07-04T00:00:00+08:00</published><updated>2019-07-04T10:37:43+08:00</updated><id>/cn/docs/how-to-do-microservice-accept-test</id><content type="html" xml:base="/cn/docs/how-to-do-microservice-accept-test/">&lt;h3 id=&quot;如何给微服务架构的项目做验收测试&quot;&gt;如何给微服务架构的项目做验收测试？&lt;/h3&gt;
+
+&lt;p&gt;基于微服务架构的应用相对于单体架构的应用而言在验收测试阶段具有以下挑战：&lt;/p&gt;
+
+&lt;ol&gt;
+  &lt;li&gt;复数的服务增加了测试环境搭建的难度&lt;/li&gt;
+  &lt;li&gt;各种异常情况的模拟变得困难，基于Mock的测试方式无法对整个调用链路作异常模拟，进而使得对整体架构的健壮性测试变得困难&lt;/li&gt;
+  &lt;li&gt;基于成本和效率的原因，测试工作已经不适合通过人工完成&lt;/li&gt;
+&lt;/ol&gt;
+
+&lt;p&gt;我们认为对基于微服务架构的应用的验收测试应该具有以下特征：&lt;/p&gt;
+
+&lt;ol&gt;
+  &lt;li&gt;自动化、可重复、易于和CI工具集成&lt;/li&gt;
+  &lt;li&gt;能够在测试运行时修改服务的行为&lt;/li&gt;
+&lt;/ol&gt;
+
+&lt;p&gt;下面将就一个Demo来介绍如何利用 &lt;a href=&quot;https://www.docker.com/&quot;&gt;Docker [1]&lt;/a&gt;、&lt;a href=&quot;https://cucumber.io/&quot;&gt;Cucumber [2]&lt;/a&gt;、&lt;a href=&quot;https://byteman.jboss.org/&quot;&gt;Byteman [3]&lt;/a&gt;、&lt;a href=&quot;https://dmp.fabric8.io/&quot;&gt;Fabric8 docker-maven-plugin [4]&lt;/a&gt;、&lt;a href=&quot;https://github.com/spotify/dockerfile-maven&quot;&gt;Spotify dockerfile-maven-plugin [5]&lt;/a&gt;达成以上目标。&lt;/p&gt;
+
+&lt;h3 id=&quot;demo介绍&quot;&gt;Demo介绍&lt;/h3&gt;
+
+&lt;p&gt;一共有两个服务Product Service（商品服务）和Product Price Service（商品价格服务），Product Service提供了一个查询接口用于获得商品信息及其价格信息的组合结果，这相当于跨服务的SQL JOIN。&lt;/p&gt;
+
+&lt;p&gt;下面是Product的Schema：&lt;/p&gt;
+
+&lt;div class=&quot;language-json highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;p&quot;&gt;{&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;id&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;,&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;name&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;,&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;description&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;}&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;下面是ProductPrice的Schema：&lt;/p&gt;
+
+&lt;div class=&quot;language-json highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;p&quot;&gt;{&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;id&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;,&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;price&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;number&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;}&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;Product Service返回的Schema则是：&lt;/p&gt;
+
+&lt;div class=&quot;language-json highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;p&quot;&gt;{&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;products&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;p&quot;&gt;[&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+    &lt;/span&gt;&lt;span class=&quot;p&quot;&gt;{&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+      &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;id&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;,&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+      &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;name&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;,&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+      &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;description&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;&amp;lt;string&amp;gt;&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;,&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+      &lt;/span&gt;&lt;span class=&quot;nl&quot;&gt;&quot;price&quot;&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;:&lt;/span&gt;&lt;span class=&quot;w&quot;&gt; &lt;/span&gt;&lt;span class=&quot;err&quot;&gt;&amp;lt;number&amp;gt;&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+    &lt;/span&gt;&lt;span class=&quot;p&quot;&gt;}&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+  &lt;/span&gt;&lt;span class=&quot;p&quot;&gt;]&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+&lt;/span&gt;&lt;span class=&quot;p&quot;&gt;}&lt;/span&gt;&lt;span class=&quot;w&quot;&gt;
+&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;该接口的实现逻辑是：&lt;/p&gt;
+
+&lt;ol&gt;
+  &lt;li&gt;Product Service本地查询得到Product List&lt;/li&gt;
+  &lt;li&gt;Product Service调用Product Price Service接口得到ProductPrice List&lt;/li&gt;
+  &lt;li&gt;拼装结果&lt;/li&gt;
+&lt;/ol&gt;
+
+&lt;p&gt;此外还有一个要求，当Product Price Service出现异常时，Product Service依然要能够返回结果，只不过&lt;code class=&quot;highlighter-rouge&quot;&gt;price&lt;/code&gt;字段为&lt;code class=&quot;highlighter-rouge&quot;&gt;null&lt;/code&gt;，即无论如何Product Service都要能够返回结果。&lt;/p&gt;
+
+&lt;h3 id=&quot;实现步骤&quot;&gt;实现步骤&lt;/h3&gt;
+
+&lt;h4 id=&quot;构建docker-image&quot;&gt;构建Docker Image&lt;/h4&gt;
+
+&lt;p&gt;为了能够便利地搭建测试环境，我们需要先为Product Servcie和Product Price Service构建Docker Image。利用&lt;a href=&quot;https://github.com/spotify/dockerfile-maven&quot;&gt;Spotify dockerfile-maven-plugin [5]&lt;/a&gt;可以很方便地做到这一点，它没有引入额外的概念，只要你会写&lt;a href=&quot;https://docs.docker.com/engine/reference/builder/&quot;&gt;Dockerfile [6]&lt;/a&gt;就行。我们在Product Service和Producer Price Service的&lt;code class=&quot;highlighter-rouge&quot;&gt;pom.xml&lt;/code&gt;中添加类似以下的配置：&lt;/p&gt;
+
+&lt;div class=&quot;language-xml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;nt&quot;&gt;&amp;lt;plugin&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;groupId&amp;gt;&lt;/span&gt;com.spotify&lt;span class=&quot;nt&quot;&gt;&amp;lt;/groupId&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;artifactId&amp;gt;&lt;/span&gt;dockerfile-maven-plugin&lt;span class=&quot;nt&quot;&gt;&amp;lt;/artifactId&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;version&amp;gt;&lt;/span&gt;${dockerfile-maven-plugin.version}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/version&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;configuration&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;repository&amp;gt;&lt;/span&gt;msat-${project.artifactId}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/repository&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;tag&amp;gt;&lt;/span&gt;${project.version}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/tag&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;buildArgs&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;JAR_FILE&amp;gt;&lt;/span&gt;${project.build.finalName}-exec.${project.packaging}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/JAR_FILE&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/buildArgs&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;/configuration&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;executions&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;execution&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;id&amp;gt;&lt;/span&gt;build&lt;span class=&quot;nt&quot;&gt;&amp;lt;/id&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;phase&amp;gt;&lt;/span&gt;package&lt;span class=&quot;nt&quot;&gt;&amp;lt;/phase&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;goals&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;goal&amp;gt;&lt;/span&gt;build&lt;span class=&quot;nt&quot;&gt;&amp;lt;/goal&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/goals&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/execution&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;/executions&amp;gt;&lt;/span&gt;
+&lt;span class=&quot;nt&quot;&gt;&amp;lt;/plugin&amp;gt;&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;并且提供了Dockerfile：&lt;/p&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;FROM openjdk:8-jre-alpine
+ARG JAR_FILE
+ENV JAR_FILE=${JAR_FILE}
+RUN mkdir /maven
+COPY target/${JAR_FILE} /maven
+COPY target/lib/byteman.jar /maven
+ENTRYPOINT java $JAVA_OPTS -jar /maven/$JAR_FILE
+EXPOSE 8080
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;注意我们在Image中添加了byteman.jar，利用它我们可以在运行时修改程序的行为。&lt;/p&gt;
+
+&lt;h4 id=&quot;编写验收测试脚本&quot;&gt;编写验收测试脚本&lt;/h4&gt;
+
+&lt;p&gt;我们新建一个验收测试的Maven项目，然后使用&lt;a href=&quot;https://cucumber.io/&quot;&gt;Cucumber [2]&lt;/a&gt;编写了以下两个场景的验收测试脚本：&lt;/p&gt;
+
+&lt;p&gt;正常情况：&lt;/p&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;Feature: List product information with price
+
+  Scenario: Everything is good
+    Given Product Service is up and running
+    And Product Price Service is up and running
+
+    When User query product list
+
+    Then Get following products
+
+      | id       | name | description            | price |
+      | animal-1 | dog  | woof woof              | 1000  |
+      | animal-2 | duck | quack quack            | 40    |
+      | animal-3 | fox  | what does the fox say? | 5000  |
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;这个脚本的大致意思是在Product Service和Product Price Service都启动的情况下，当用户查询Product信息时，我们会得到上述表格中的结果。&lt;/p&gt;
+
+&lt;p&gt;Product Price Service异常情况：&lt;/p&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;Feature: List product information with price
+
+  Scenario: Product Price Service throws exception when being queried
+    Given Product Service is up and running
+    And Product Price Service is up and running
+
+    Given Install the byteman script product_price_exception.btm to Product Price Service
+
+    When User query product list
+
+    Then Get following products
+
+      | id       | name | description            | price |
+      | animal-1 | dog  | woof woof              |       |
+      | animal-2 | duck | quack quack            |       |
+      | animal-3 | fox  | what does the fox say? |       |
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;注意到我们在这里使用了&lt;a href=&quot;https://byteman.jboss.org/&quot;&gt;Byteman [3]&lt;/a&gt;注入了异常情况给Product Price Service：&lt;/p&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;Given Install the byteman script product_price_exception.btm to Product Price Service
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;&lt;code class=&quot;highlighter-rouge&quot;&gt;product_price_exception.btm&lt;/code&gt;的内容是这样的：&lt;/p&gt;
+
+&lt;pre&gt;&lt;code class=&quot;language-txt&quot;&gt;RULE throw exception
+CLASS me.chanjar.msat.productprice.FakeProductPriceRepository
+METHOD listAll
+AT ENTRY
+IF TRUE
+DO debug(&quot;throw RuntimeException here&quot;),
+   throw new RuntimeException(&quot;Product Repository Error!&quot;)
+ENDRULE
+&lt;/code&gt;&lt;/pre&gt;
+
+&lt;p&gt;意思是在调用&lt;code class=&quot;highlighter-rouge&quot;&gt;FakeProductPriceRepository.listAll&lt;/code&gt;方法时抛出异常，注意这样做并没有修改Product Price Service的源码，而是在运行时修改了它的逻辑。&lt;/p&gt;
+
+&lt;p&gt;接下来我们为上面的验收测试脚本实现逻辑（下面代码与实际上有所不同，这是为了尽量使得代码篇幅精简）：&lt;/p&gt;
+
+&lt;div class=&quot;language-java highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;kd&quot;&gt;public&lt;/span&gt; &lt;span class=&quot;kd&quot;&gt;class&lt;/span&gt; &lt;span class=&quot;nc&quot;&gt;Stepdefs&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;{&lt;/span&gt;
+
+  &lt;span class=&quot;kd&quot;&gt;private&lt;/span&gt; &lt;span class=&quot;nc&quot;&gt;List&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;&amp;lt;&lt;/span&gt;&lt;span class=&quot;nc&quot;&gt;Map&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;&amp;lt;&lt;/span&gt;&lt;span class=&quot;nc&quot;&gt;String&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;,&lt;/span&gt; &lt;span class=&quot;nc&quot;&gt;String&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;&amp;gt;&amp;gt;&lt;/span&gt; &lt;span class=&quot;n&quot;&gt;answer&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;;&lt;/span&gt;
+
+  &lt;span class=&quot;nd&quot;&gt;@Given&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;^Product Service is up and running$&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
+  &lt;span class=&quot;kd&quot;&gt;public&lt;/span&gt; &lt;span class=&quot;kt&quot;&gt;void&lt;/span&gt; &lt;span class=&quot;nf&quot;&gt;productServiceIsUpAndRunning&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;{&lt;/span&gt;
+    &lt;span class=&quot;n&quot;&gt;probe&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;Product Service&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;,&lt;/span&gt; &lt;span class=&quot;no&quot;&gt;PRODUCT_ADDRESS&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;);&lt;/span&gt;
+  &lt;span class=&quot;o&quot;&gt;}&lt;/span&gt;
+
+  &lt;span class=&quot;nd&quot;&gt;@And&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;^Product Price Service is up and running$&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
+  &lt;span class=&quot;kd&quot;&gt;public&lt;/span&gt; &lt;span class=&quot;kt&quot;&gt;void&lt;/span&gt; &lt;span class=&quot;nf&quot;&gt;productPriceServiceIsUpAndRunning&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;{&lt;/span&gt;
+    &lt;span class=&quot;n&quot;&gt;probe&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;Product Price Service&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;,&lt;/span&gt; &lt;span class=&quot;no&quot;&gt;PRODUCT_PRICE_ADDRESS&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;);&lt;/span&gt;
+    &lt;span class=&quot;n&quot;&gt;clearBytemanScript&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;();&lt;/span&gt;
+  &lt;span class=&quot;o&quot;&gt;}&lt;/span&gt;
+
+  &lt;span class=&quot;nd&quot;&gt;@When&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;^User query product list$&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
+  &lt;span class=&quot;kd&quot;&gt;public&lt;/span&gt; &lt;span class=&quot;kt&quot;&gt;void&lt;/span&gt; &lt;span class=&quot;nf&quot;&gt;queryProductList&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;{&lt;/span&gt;
+    &lt;span class=&quot;n&quot;&gt;answer&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;=&lt;/span&gt; &lt;span class=&quot;n&quot;&gt;given&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;when&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;get&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;no&quot;&gt;PRODUCT_ADDRESS&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;+&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;&quot;/products&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;then&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;statusCode&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;n&quot;&gt;is&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;mi&quot;&gt;200&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;))&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;extract&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;body&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;jsonPath&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;()&lt;/span&gt;
+      &lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;getList&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;products&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;,&lt;/span&gt; &lt;span class=&quot;nc&quot;&gt;Map&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;.&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;class&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;);&lt;/span&gt;
+  &lt;span class=&quot;o&quot;&gt;}&lt;/span&gt;
+
+  &lt;span class=&quot;nd&quot;&gt;@Given&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;^Install the byteman script ([A-Za-z0-9_\\.]+) to Product Price Service$&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
+  &lt;span class=&quot;kd&quot;&gt;public&lt;/span&gt; &lt;span class=&quot;kt&quot;&gt;void&lt;/span&gt; &lt;span class=&quot;nf&quot;&gt;injectExceptionIntoProductPriceService&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;nc&quot;&gt;String&lt;/span&gt; &lt;span class=&quot;n&quot;&gt;bytemanScript&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt; &lt;span class=&quot;kd&quot;&gt;throws&lt;/span&gt; &lt;span class=&quot;nc&quot;&gt;Exception&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;{&lt;/span&gt;
+    &lt;span class=&quot;n&quot;&gt;injectBytemanScript&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;target/test-classes/&quot;&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;+&lt;/span&gt; &lt;span class=&quot;n&quot;&gt;bytemanScript&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;);&lt;/span&gt;
+  &lt;span class=&quot;o&quot;&gt;}&lt;/span&gt;
+
+  &lt;span class=&quot;nd&quot;&gt;@Then&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;^Get following products$&quot;&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt;
+  &lt;span class=&quot;kd&quot;&gt;public&lt;/span&gt; &lt;span class=&quot;kt&quot;&gt;void&lt;/span&gt; &lt;span class=&quot;nf&quot;&gt;compareResult&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;nc&quot;&gt;List&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;&amp;lt;&lt;/span&gt;&lt;span class=&quot;nc&quot;&gt;Map&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;&amp;lt;&lt;/span&gt;&lt;span class=&quot;nc&quot;&gt;String&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;,&lt;/span&gt; &lt;span class=&quot;nc&quot;&gt;String&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;&amp;gt;&amp;gt;&lt;/span&gt; &lt;span class=&quot;n&quot;&gt;expected&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;)&lt;/span&gt; &lt;span class=&quot;o&quot;&gt;{&lt;/span&gt;
+    &lt;span class=&quot;n&quot;&gt;assertThat&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;n&quot;&gt;answer&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;).&lt;/span&gt;&lt;span class=&quot;na&quot;&gt;containsExactlyInAnyOrderElementsOf&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;(&lt;/span&gt;&lt;span class=&quot;n&quot;&gt;expected&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;);&lt;/span&gt;
+  &lt;span class=&quot;o&quot;&gt;}&lt;/span&gt;
+&lt;span class=&quot;o&quot;&gt;}&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;关于&lt;a href=&quot;https://cucumber.io/&quot;&gt;Cucumber [2]&lt;/a&gt;和&lt;a href=&quot;https://byteman.jboss.org/&quot;&gt;Byteman [3]&lt;/a&gt;的更详细的介绍可以见&lt;a href=&quot;https://servicecomb.apache.org/cn/docs/saga_with_cucumber/&quot;&gt;ServiceComb Saga使用Cucumber做验收测试源码分析 [7]&lt;/a&gt;。&lt;/p&gt;
+
+&lt;h4 id=&quot;自动化搭建测试环境&quot;&gt;自动化搭建测试环境&lt;/h4&gt;
+
+&lt;p&gt;我们希望能够在Maven的&lt;code class=&quot;highlighter-rouge&quot;&gt;integration-test&lt;/code&gt; 阶段搭建测试环境、执行上述验收测试脚本。在&lt;code class=&quot;highlighter-rouge&quot;&gt;pom.xml&lt;/code&gt;中添加到&lt;a href=&quot;https://dmp.fabric8.io/&quot;&gt;Fabric8 docker-maven-plugin [4]&lt;/a&gt;：&lt;/p&gt;
+
+&lt;div class=&quot;language-xml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;nt&quot;&gt;&amp;lt;plugin&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;groupId&amp;gt;&lt;/span&gt;io.fabric8&lt;span class=&quot;nt&quot;&gt;&amp;lt;/groupId&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;artifactId&amp;gt;&lt;/span&gt;docker-maven-plugin&lt;span class=&quot;nt&quot;&gt;&amp;lt;/artifactId&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;configuration&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;showLogs&amp;gt;&lt;/span&gt;true&lt;span class=&quot;nt&quot;&gt;&amp;lt;/showLogs&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;images&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;image&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;name&amp;gt;&lt;/span&gt;msat-product:${project.version}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/name&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;alias&amp;gt;&lt;/span&gt;msat-product&lt;span class=&quot;nt&quot;&gt;&amp;lt;/alias&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;run&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;wait&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;log&amp;gt;&lt;/span&gt;Started [a-zA-Z]+ in [0-9.]+ seconds&lt;span class=&quot;nt&quot;&gt;&amp;lt;/log&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;time&amp;gt;&lt;/span&gt;120000&lt;span class=&quot;nt&quot;&gt;&amp;lt;/time&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;/wait&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;links&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;link&amp;gt;&lt;/span&gt;msat-product-price:msat-product-price&lt;span class=&quot;nt&quot;&gt;&amp;lt;/link&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;/links&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;ports&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;port&amp;gt;&lt;/span&gt;product.port:8080&lt;span class=&quot;nt&quot;&gt;&amp;lt;/port&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;/ports&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;/run&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/image&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;image&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;name&amp;gt;&lt;/span&gt;msat-product-price:${project.version}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/name&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;alias&amp;gt;&lt;/span&gt;msat-product-price&lt;span class=&quot;nt&quot;&gt;&amp;lt;/alias&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;run&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;env&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;JAVA_OPTS&amp;gt;&lt;/span&gt;
+              -Dorg.jboss.byteman.debug=true -Dorg.jboss.byteman.verbose=true
+              -javaagent:/maven/byteman.jar=port:9091,address:0.0.0.0,listener:true
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;/JAVA_OPTS&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;/env&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;wait&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;log&amp;gt;&lt;/span&gt;Started [a-zA-Z]+ in [0-9.]+ seconds&lt;span class=&quot;nt&quot;&gt;&amp;lt;/log&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;time&amp;gt;&lt;/span&gt;120000&lt;span class=&quot;nt&quot;&gt;&amp;lt;/time&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;/wait&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;ports&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;port&amp;gt;&lt;/span&gt;product-price.port:8080&lt;span class=&quot;nt&quot;&gt;&amp;lt;/port&amp;gt;&lt;/span&gt;
+            &lt;span class=&quot;nt&quot;&gt;&amp;lt;port&amp;gt;&lt;/span&gt;product-price.byteman.port:9091&lt;span class=&quot;nt&quot;&gt;&amp;lt;/port&amp;gt;&lt;/span&gt;
+          &lt;span class=&quot;nt&quot;&gt;&amp;lt;/ports&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;/run&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/image&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/images&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;/configuration&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;executions&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;execution&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;id&amp;gt;&lt;/span&gt;start&lt;span class=&quot;nt&quot;&gt;&amp;lt;/id&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;phase&amp;gt;&lt;/span&gt;pre-integration-test&lt;span class=&quot;nt&quot;&gt;&amp;lt;/phase&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;goals&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;goal&amp;gt;&lt;/span&gt;start&lt;span class=&quot;nt&quot;&gt;&amp;lt;/goal&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/goals&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/execution&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;execution&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;id&amp;gt;&lt;/span&gt;stop&lt;span class=&quot;nt&quot;&gt;&amp;lt;/id&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;phase&amp;gt;&lt;/span&gt;post-integration-test&lt;span class=&quot;nt&quot;&gt;&amp;lt;/phase&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;goals&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;goal&amp;gt;&lt;/span&gt;stop&lt;span class=&quot;nt&quot;&gt;&amp;lt;/goal&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/goals&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/execution&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;/executions&amp;gt;&lt;/span&gt;
+&lt;span class=&quot;nt&quot;&gt;&amp;lt;/plugin&amp;gt;&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;这样一来就能够在&lt;code class=&quot;highlighter-rouge&quot;&gt;pre-integration-test&lt;/code&gt;阶段启动容器，在&lt;code class=&quot;highlighter-rouge&quot;&gt;post-integration-test&lt;/code&gt;阶段销毁容器了。&lt;/p&gt;
+
+&lt;h4 id=&quot;take-a-run&quot;&gt;Take a run&lt;/h4&gt;
+
+&lt;p&gt;接下来只需要&lt;code class=&quot;highlighter-rouge&quot;&gt;mvn clean install&lt;/code&gt;它就会：&lt;/p&gt;
+
+&lt;ol&gt;
+  &lt;li&gt;构建：
+    &lt;ol&gt;
+      &lt;li&gt;构建Product Service项目，并为其构建Docker Image&lt;/li&gt;
+      &lt;li&gt;构建Product Price Service项目，并为其构建Docker Image&lt;/li&gt;
+    &lt;/ol&gt;
+  &lt;/li&gt;
+  &lt;li&gt;验收测试：
+    &lt;ol&gt;
+      &lt;li&gt;启动Product Service和Product Price Service的容器&lt;/li&gt;
+      &lt;li&gt;执行验收测试脚本&lt;/li&gt;
+      &lt;li&gt;销毁上述创建的容器&lt;/li&gt;
+    &lt;/ol&gt;
+  &lt;/li&gt;
+&lt;/ol&gt;
+
+&lt;p&gt;如果你想自己试试可以下载&lt;a href=&quot;https://github.com/chanjarster/microservice-acceptance-test-demo&quot;&gt;本项目源码[8]&lt;/a&gt;。&lt;/p&gt;
+
+&lt;p&gt;欢迎开发者朋友们加入ServiceComb社区，一起做些有意思的事情。&lt;a href=&quot;http://servicecomb.incubator.apache.org/cn/docs/join_the_community/&quot;&gt;加入社区方法[9]&lt;/a&gt;&lt;/p&gt;
+
+&lt;h3 id=&quot;参考资料&quot;&gt;参考资料&lt;/h3&gt;
+
+&lt;p&gt;[1] Docker https://www.docker.com/&lt;/p&gt;
+
+&lt;p&gt;[2] Cucumber https://cucumber.io/&lt;/p&gt;
+
+&lt;p&gt;[3] Byteman  https://byteman.jboss.org/&lt;/p&gt;
+
+&lt;p&gt;[4] Fabric8 docker-maven-plugin  https://dmp.fabric8.io/&lt;/p&gt;
+
+&lt;p&gt;[5] Spotify dockerfile-maven-plugin https://github.com/spotify/dockerfile-maven&lt;/p&gt;
+
+&lt;p&gt;[6] Dockerfile https://docs.docker.com/engine/reference/builder/&lt;/p&gt;
+
+&lt;p&gt;[7] ServiceComb Saga使用Cucumber做验收测试源码分析 https://servicecomb.apache.org/cn/docs/saga_with_cucumber/&lt;/p&gt;
+
+&lt;p&gt;[8] 本项目源码 https://github.com/chanjarster/microservice-acceptance-test-demo&lt;/p&gt;
+
+&lt;p&gt;[9] 加入Servicecomb社区  http://servicecomb.incubator.apache.org/cn/docs/join_the_community/&lt;/p&gt;</content><author><name>Qian Jia</name><email>chanjarster@gmail.com</email><uri>https://github.com/chanjarster</uri></author><category term="微服务" /><summary type="html">本文将介绍如何给微服务架构的项目做验收测试</summary></entry><entry xml:lang="cn"><title type="html">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)</title><link href="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="alternate" type="text/html" title="Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)" /><published>2019-07-02T00:00:00+08:00</published><updated>2019-07-02T12:26:28+08:00</updated><id>/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report</id><content type="html" xml:base="/cn/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/">&lt;p&gt;北京时间2019年6月24日，Apache ServiceComb社区在中国上海世博中心举办的开源业界最负盛名的 KubeCon+CloudNativeCon+Open Source Summit 云原生会议组织了微服务同场活动 Apache ServiceComb Meetup，并圆满落下帷幕。&lt;/p&gt;
+
+&lt;p&gt;本次活动邀请了Apache Member、Apache Committer、华为云云服务首席工程师、京东数科专家、全球Top10 IT服务提供商开发经理等各行业的资深从业者，携手为大家分享了Apache社区开发经验、企业级PaaS应对复杂网络拓补的案例、汽车品牌数字化营销系统微服务化实践、高性能服务间通信的优化技巧等诸多微服务技术及经验，ServiceComb社区也重磅发布了一系列解决用户应用微服务化痛点的创新新品。&lt;/p&gt;
+
+&lt;p&gt;在企业向数字化和云化转型过程中，微服务是不二选择，然而它并不是银弹，企业在微服务化过程中会遇到诸多挑战，ServiceComb将继续紧密围绕社区用户和开发者，携手解决微服务痛点问题。&lt;/p&gt;
+
+&lt;p&gt;秉承“将复杂留给自己，极简留给用户，提供一站式的微服务开源解决方案，致力于帮助企业、用户和开发者将应用轻松微服务化上云，实现对微服务应用的高效运维管理” 的发展理念，社区发起召集令，动员有志者加入社区，一起做点有意思的事情。&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/Community_Summoned_zh.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;全场视频回顾:&lt;/strong&gt; &lt;a href=&quot;https://huaweicloud.bugu.mudu.tv/watch/ym1vkamp&quot;&gt;链接&lt;/a&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《ServiceComb开源这两年》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/1_ServiceComb_Opensource_Way.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;姜宁&lt;/strong&gt;，Apache软件基金会会员，华为开源能力中心技术专家，前红帽软件首席软件工程师，有十五年企业级开源中间件开发经验，有丰富的Java开发和使用经验，函数式编程爱好者。从2006年开始一直从事Apache开源中间件项目的开发工作，先后参与Apache CXF， Apache Camel，Apache ServiceMix以及Apache ServiceComb的开发。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; ServiceComb正式开源已经两年了，在这两年中我们经历了代码首发时的激动，由0到1拓展社区的困惑，以及结识到结伴同行的小伙伴的快乐， 如今ServiceComb已经成长为Apache软件基金会顶级项目。本次演讲将总结回顾ServiceComb开源这两年的感悟与收获，希望能够帮助大家了解开源，参与开源，共创美好未来。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《汽车品牌的数字化营销系统微服务实践》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/2_NTTDATA_Microservice_Practices.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;朱小卫&lt;/strong&gt;，NTTDATA中国上海分公司Digital Marketing开发经理，15年+研发经验，丰富的电商、CRM等产品服务实践经验，近三年专注于汽车整车的数字化转型解决方案。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; NTTDATA是全球Top10内的IT服务提供商，为汽车、制造、航空、零售、服装等行业提供全渠道整合跨渠道协同、个性化营销及服务、消费者洞察大数据分析等数字化营销解决方案，本主题主要分享NTTDATA向微服务化转型，打造集中化、标准化、智能化、便利化的汽车品牌数字营销平台，帮助企业灵活应对市场需求，支持数字营销快速、多样、变化的业务场景的实践。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《企业级PaaS中的微服务应用揭秘》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/3_Enterprise_PaaS_Microservice_Pratices.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;田晓亮&lt;/strong&gt;，10年软件行业经验，现任华为公有云服务ServiceStage首席工程师。2012年进入云计算领域，对PaaS， DevOps，APM等有深入的研究和实践经验。负责公司微服务框架的设计，开发和落地，微服务引擎云服务商用上线公有云。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; 我们在公有云交付PaaS平台，帮助用户管理应用，通过流水线进行持续交付，管领应用的全生命周期，当应用系统的网络拓扑变得不断复杂后，需要引入微服务架构模式，来解决分布式系统的复杂性，本主题将讲述PaaS平台如何使用ServiceComb帮助用户完成微服务转型。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《微服务创新新品发布》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/4_Innovation_New_Project_Release.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;马彬&lt;/strong&gt;，ServiceComb 社区成员，华为开源软件能力中心架构师，企业应用微服务化工程师，13+年电信级中间件平台、虚拟化、嵌入式操作系统与开源软件设计开发经验。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; ServiceComb在Aapche毕业已经约半年时间，在这半年里面，社区并未冒进地去迸发新的项目或特性，而是选择了认真听取用户的意见。如今，ServiceComb社区确定了系列解决用户微服务化过程中痛点的方向，并且开始在社区里面继续创新孵化。本主题将和大家分享这些获取到的痛点和孵化项目，期望与用户/开发者一起思考如何一起去摆平微服务中的难题。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《解密ShardingSphere与ServiceComb联合打造的分布式事务解决方案》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/5_ShardingSphere_Distributed_Transaction_Solution.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;潘娟&lt;/strong&gt;，京东数科高级DBA，主要负责京东数科数据库中间件开发、数据库运维自动化平台开发、生产数据库运维工作。多次参与京东6.18、11.11等大促活动的护航工作。曾负责京东数科数据库自动化平台设计与开发，现专注于Apache ShardingSphere分布式数据库中间件开发。乐于在数据库、自动化、分布式、中间件等相关领域进行学习和探索。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; 业务层面的微服务架构大行其道，底层分布式数据库&amp;amp;中间件如火如荼。在微服务场景下，各服务之间数据库相互独立，不能依靠单一数据库来实现跨服务的事务一致性；在分布式数据库集群状态下，又如何实现分布式事务呢？ShardingSphere作为首个Apache基金会的分布式数据库中间件项目与首个Apache微服务顶级项目ServiceComb强强联合，共同打造微服务与分布式数据库场景下的分布式事务解决方案。
+本次分享将围绕分布式事务，并以ShardingSphere与ServiceComb联合打造的分布式事务解决方案作为核心内容进行详细阐述和讲解。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《支持10万TPS的高性能服务间通信解读》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/6_Microservice_High_Performance_Communication.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;刘宝&lt;/strong&gt;，Apache软件基金会 Commiter，拥有10年以上java开发框架的开发和运维经验。热爱微服务，并持续为它们开发一些常用的工具，比如进行中的servicecomb-fence项目。也喜欢分享开发和软件工程能力建设方面的一些心得，它们都发布在华为云博客和知乎专栏上面。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; 200TPS的处理能力，已经能够满足很大一部分业务系统对于性能的要求。另外一方面，优化服务器间通信的性能的收益，很容易通过优化应用代码实现或者被应用代码状况抵消，还可以低成本的通过水平扩展处理能力等方式获得，因此开发者往往不重视通信能力的优化。本次演讲结合servicecomb-java-chassis的通信优化实践，说明性能优化的一些常见手段，并实践的视角，分享性能优化在系统可靠性、资源规划等其他不容易被开发者直接感知的方面的收益。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《华为云分布式事务云服务实践》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/7_HuaweiCloud_Distributed_Transaction_DTM_Practices.pdf&quot;&gt;PDF下载&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;主讲人：&lt;/strong&gt; &lt;strong&gt;王启军&lt;/strong&gt;，华为云PaaS团队，负责java和go微服务框架。曾任当当网架构师，主导电商平台架构设计；曾就职于搜狐负责手机微博的研发。《持续演进的Cloud Native》作者，微信公众号“奔跑中的蜗牛”博主。&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;摘要：&lt;/strong&gt; 微服务架构下，服务数量暴涨，一个服务可以完成的工作会被分发到多个服务，按照“服务自治”的原则，数据访问通过接口隔离，原本的单库事务变成了分布式事务，“当你开始考虑一致性问题的时候，才能说明你开始真正的了解微服务了”，本专题通过相关场景说明当你基于华为云构建微服务的时候，如何实现分布式事务？失败如何回退？超时如何处理？详细说明其背后的原理。&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;如您有更多问题关于Aapche ServiceComb，欢迎您扫码或微信添加“ServiceComb小助手”，我们将认真对待您的每一个问题&lt;/strong&gt;
+&lt;img src=&quot;/assets/images/QRcode.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;</content><author><name>Mabin</name></author><category term="微服务" /><category term="Meetup" /><summary type="html">Apache ServiceComb Meetup</summary></entry><entry xml:lang="en"><title type="html">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)</title><link href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="alternate" type="text/html" title="Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)" /><published>2019-07-02T00:00:00+08:00</published><updated>2019-07-02T12:26:28+08:00</updated><id>/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report</id><content type="html" xml:base="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/">&lt;p&gt;On June 24, 2019, Beijing time, at the Shanghai World Expo Center in China, the Apache ServiceComb community held microservice Co-Located event at the KubeCon+CloudNativeCon+Open Source Summit conference which the most prestigious in the open source industry.&lt;/p&gt;
+
+&lt;p&gt;The event invited Apache Member, Apache Committer, Huawei Cloud ServiceStage Chief Engineer, Jingdong DBA Expert, Global Top10 IT Service Provider Development Manager and other senior practitioners to share experience,the topic of the speech includes Apache community development experience, enterprise PaaS responds to complex network topology cases, car brand digital marketing system microservice practices, high-performance service communication optimization techniques and so on. ServiceComb community has also released a series of  innovative new projects to assist user solve pain points of microservice&lt;/p&gt;
+
+&lt;p&gt;In the process of enterprise transformation to digitalization and cloudization, microservice is the best choice. However, it is not a silver bullet. Enterprises will encounter many challenges in the process of microservice. ServiceComb will continue to closely focus on users and developers,solve the problem of microservice pain points.&lt;/p&gt;
+
+&lt;p&gt;Adhering to the concept of “provide a one-stop open source micro-service solution to assist enterprises, users and developers migrate applications on the cloud, archieving efficient O&amp;amp;M and management of microservice applications”,ServiceComb community initiates a convening order to mobilize aspiring people to join the community and do something interesting together.&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/Community_Summoned_en.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;Video review:&lt;/strong&gt; &lt;a href=&quot;https://huaweicloud.bugu.mudu.tv/watch/ym1vkamp&quot;&gt;Link&lt;/a&gt;&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《ServiceComb opensource way》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/1_ServiceComb_Opensource_Way.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Willem Jiang&lt;/strong&gt;, Apache Member, Apache ServiceComb VP&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This speech summarizes the experience and gains of ServiceComb open source in the past two years. Hope that to assist guys understand open source, participate in open source, and create a better future.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《Digital marketing system microservice practice of car brands》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/2_NTTDATA_Microservice_Practices.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Xiaowei Zhu&lt;/strong&gt;, NTTDATA Shanghai Branch, Digital Marketing Development Manager&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This speech shares the transformation of NTTDATA into microservice, and creates a digital marketing platform for car brands, assist enterprises to flexibly respond to market demands and supporting the practice of fast changing business scenarios of digital marketing.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《Microservice practice in enterprise PaaS》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/3_Enterprise_PaaS_Microservice_Pratices.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Shawn Tian&lt;/strong&gt;, Huawei Cloud ServiceStage Chief Engineer&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This speech shares Huawei Cloud PaaS platform using ServiceComb to solve complex network topology problems of distributed systems, assist users complete microservice transformation.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《ServiceComb innovation new projects release》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/4_Innovation_New_Project_Release.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Mabin&lt;/strong&gt;, Apache ServiceComb member, Huawei Open Source Software Architect&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This speech shares the pain points of users in the process of implementing microservices transformation, as well as ServiceComb’s innovative projects, we look forward to working with more users and developers to think about how to solve the problems in microservices together.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《ShardingSphere combines ServiceComb distributed transaction solution》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/5_ShardingSphere_Distributed_Transaction_Solution.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Juan Pan&lt;/strong&gt;, Apache ShardingSphere member, Jingdong DBA Expert&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This speech revolves around distributed transactions, explains that ShardingSphere(the first ASF distributed database middleware project) to join forces with ServiceComb(the first ASF microservice top-level project) to implement distributed transactions solution in microservice and distributed database scenarios.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《High-performance service communication practice》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/6_Microservice_High_Performance_Communication.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Bruce Liu&lt;/strong&gt;, Apache Commiter&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This speech combines the communication optimization practices of servicecomb-java-chassis to illustrate some common methods of performance optimization, and from a practical perspective, sharing performance optimization in terms of system reliability, resource planning, and other aspects that are not easily perceived by developers directly. .&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;《Huawei Cloud distributed transaction solution》&lt;/strong&gt;  &lt;a href=&quot;/assets/slides/20190624/7_HuaweiCloud_Distributed_Transaction_DTM_Practices.pdf&quot;&gt;PDF Download&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Speaker：&lt;/strong&gt; &lt;strong&gt;Jon Wang&lt;/strong&gt;, Huawei Cloud Architect&lt;/p&gt;
+
+&lt;p&gt;&lt;strong&gt;Summary：&lt;/strong&gt; This topic explains how to implement distributed transactions when you build microservices based on Huawei Cloud through related scenarios. How to fail back? How to deal with timeouts? Explain in detail the principles behind it.&lt;/p&gt;
+
+&lt;hr /&gt;
+&lt;p&gt;&lt;strong&gt;more questions, welcome to scan the QR code or WeChat to add “ServiceComb Assistant&lt;/strong&gt;
+&lt;img src=&quot;/assets/images/QRcode.png&quot; alt=&quot;1&quot; /&gt;&lt;/p&gt;</content><author><name>Mabin</name></author><category term="Microservice" /><category term="Meetup" /><summary type="html">Apache ServiceComb Meetup</summary></entry><entry xml:lang="cn"><title type="html">ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka</title><link href="/cn/docs/servicecomb-pack-eureka/" rel="alternate" type="text/html" title="ServiceComb Pack 0.4.0 集成发现服务 : Spring Cloud Eureka" /><published>2019-04-15T00:00:00+08:00</published><updated>2019-04-15T19:30:00+08:00</updated><id>/cn/docs/servicecomb-pack-eureka</id><content type="html" xml:base="/cn/docs/servicecomb-pack-eureka/">&lt;p&gt;ServiceComb Pack 从 0.4.0 版本开始支持将 Alpha 服务实例注册到发现服务 Eureka 中，Omega 端的程序通过注册中心 Eureka 就可以连接 Alpha 服务&lt;/p&gt;
+
+&lt;h3 id=&quot;编译支持-eureka-的版本&quot;&gt;编译支持 Eureka 的版本&lt;/h3&gt;
+
+&lt;p&gt;默认发行版不包含 Eureka 的支持，你需要使用 &lt;code class=&quot;highlighter-rouge&quot;&gt;-Pspring-cloud-eureka&lt;/code&gt; 参数编译支持 Eureka 的版本&lt;/p&gt;
+
+&lt;div class=&quot;language-bash highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;git clone https://github.com/apache/servicecomb-pack.git
+&lt;span class=&quot;nb&quot;&gt;cd &lt;/span&gt;servicecomb-pack
+mvn clean &lt;span class=&quot;nb&quot;&gt;install&lt;/span&gt; &lt;span class=&quot;nt&quot;&gt;-DskipTests&lt;/span&gt;&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;&lt;span class=&quot;nb&quot;&gt;true&lt;/span&gt; &lt;span class=&quot;nt&quot;&gt;-Pspring-boot-2&lt;/span&gt;,spring-cloud-eureka
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;h3 id=&quot;启动-eureka&quot;&gt;启动 Eureka&lt;/h3&gt;
+
+&lt;ul&gt;
+  &lt;li&gt;使用 Docker 启动 Eureka，更多方式请参考官方网站 &lt;a href=&quot;https://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html#spring-cloud-eureka-server&quot;&gt;https://cloud.spring.io&lt;/a&gt;&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;div class=&quot;language-bash highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;docker run &lt;span class=&quot;nt&quot;&gt;-d&lt;/span&gt; &lt;span class=&quot;nt&quot;&gt;-p&lt;/span&gt; 8761:8761 springcloud/eureka
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;ul&gt;
+  &lt;li&gt;访问 Eureka UI&lt;/li&gt;
+&lt;/ul&gt;
+
+&lt;p&gt;在浏览器中访问 http://0.0.0.0:8761  ，能看到如下页面表示 Eureka 启动成功&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/2019-04-15-servicecomb-pack-eureka/eureka-main.png&quot; alt=&quot;eureka_main&quot; /&gt;&lt;/p&gt;
+
+&lt;h3 id=&quot;启动-alpha&quot;&gt;启动 Alpha&lt;/h3&gt;
+
+&lt;p&gt;注册中心功能通过设置  &lt;code class=&quot;highlighter-rouge&quot;&gt;eureka.client.enabled=true&lt;/code&gt; 参数开启&lt;/p&gt;
+
+&lt;div class=&quot;language-bash highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;java &lt;span class=&quot;nt&quot;&gt;-jar&lt;/span&gt; alpha-server-0.4.0-exec.jar &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--server&lt;/span&gt;.port&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;8090 &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--alpha&lt;/span&gt;.server.port&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;8080 &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--spring&lt;/span&gt;.datasource.url&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;&lt;span class=&quot;s2&quot;&gt;&quot;jdbc:postgresql://127.0.0.1:5432/saga?useSSL=false&quot;&lt;/span&gt; &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--spring&lt;/span&gt;.datasource.username&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;saga-user &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--spring&lt;/span&gt;.datasource.password&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;saga-password &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--eureka&lt;/span&gt;.client.enabled&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;&lt;span class=&quot;nb&quot;&gt;true&lt;/span&gt; &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--eureka&lt;/span&gt;.client.service-url.defaultZone&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;http://0.0.0.0:8761/eureka &lt;span class=&quot;se&quot;&gt;\&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;--spring&lt;/span&gt;.profiles.active&lt;span class=&quot;o&quot;&gt;=&lt;/span&gt;prd 
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+&lt;p&gt;&lt;strong&gt;注意:&lt;/strong&gt; 更多 eureka 参数请参考 &lt;a href=&quot;https://cloud.spring.io/spring-cloud-netflix/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter&quot;&gt;Spring Cloud Netflix 2.x&lt;/a&gt; &lt;a href=&quot;https://cloud.spring.io/spring-cloud-netflix/1.4.x/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter&quot;&gt;Spring Cloud Netflix 1.x&lt;/a&gt;&lt;/p&gt;
+
+&lt;p&gt;Alpha 启动完毕后可以看到已经注册到 Eureka&lt;/p&gt;
+
+&lt;p&gt;&lt;img src=&quot;/assets/images/2019-04-15-servicecomb-pack-eureka/alpha_register_to_eureka.png&quot; alt=&quot;alpha_register_to_eureka&quot; /&gt;&lt;/p&gt;
+
+&lt;p&gt;执行命令 &lt;code class=&quot;highlighter-rouge&quot;&gt;curl http://127.0.0.1:8761/eureka/apps/&lt;/code&gt; 可以看到已经将 Alpha 的 gRPC 地址和端口注册到 Eureka 的 Metadata 中&lt;/p&gt;
+
+&lt;div class=&quot;language-xml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;nt&quot;&gt;&amp;lt;applications&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;versions__delta&amp;gt;&lt;/span&gt;1&lt;span class=&quot;nt&quot;&gt;&amp;lt;/versions__delta&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;apps__hashcode&amp;gt;&lt;/span&gt;UP_1_&lt;span class=&quot;nt&quot;&gt;&amp;lt;/apps__hashcode&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;application&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;name&amp;gt;&lt;/span&gt;SERVICECOMB-ALPHA-SERVER&lt;span class=&quot;nt&quot;&gt;&amp;lt;/name&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;instance&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;hostName&amp;gt;&lt;/span&gt;10.50.8.23&lt;span class=&quot;nt&quot;&gt;&amp;lt;/hostName&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;app&amp;gt;&lt;/span&gt;SERVICECOMB-ALPHA-SERVER&lt;span class=&quot;nt&quot;&gt;&amp;lt;/app&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;ipAddr&amp;gt;&lt;/span&gt;10.50.8.23&lt;span class=&quot;nt&quot;&gt;&amp;lt;/ipAddr&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;status&amp;gt;&lt;/span&gt;UP&lt;span class=&quot;nt&quot;&gt;&amp;lt;/status&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;overriddenstatus&amp;gt;&lt;/span&gt;UNKNOWN&lt;span class=&quot;nt&quot;&gt;&amp;lt;/overriddenstatus&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;port&lt;/span&gt; &lt;span class=&quot;na&quot;&gt;enabled=&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;true&quot;&lt;/span&gt;&lt;span class=&quot;nt&quot;&gt;&amp;gt;&lt;/span&gt;8090&lt;span class=&quot;nt&quot;&gt;&amp;lt;/port&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;securePort&lt;/span&gt; &lt;span class=&quot;na&quot;&gt;enabled=&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;false&quot;&lt;/span&gt;&lt;span class=&quot;nt&quot;&gt;&amp;gt;&lt;/span&gt;443&lt;span class=&quot;nt&quot;&gt;&amp;lt;/securePort&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;countryId&amp;gt;&lt;/span&gt;1&lt;span class=&quot;nt&quot;&gt;&amp;lt;/countryId&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;dataCenterInfo&lt;/span&gt; &lt;span class=&quot;na&quot;&gt;class=&lt;/span&gt;&lt;span class=&quot;s&quot;&gt;&quot;com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo&quot;&lt;/span&gt;&lt;span class=&quot;nt&quot;&gt;&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;name&amp;gt;&lt;/span&gt;MyOwn&lt;span class=&quot;nt&quot;&gt;&amp;lt;/name&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/dataCenterInfo&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;leaseInfo&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;renewalIntervalInSecs&amp;gt;&lt;/span&gt;30&lt;span class=&quot;nt&quot;&gt;&amp;lt;/renewalIntervalInSecs&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;durationInSecs&amp;gt;&lt;/span&gt;90&lt;span class=&quot;nt&quot;&gt;&amp;lt;/durationInSecs&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;registrationTimestamp&amp;gt;&lt;/span&gt;1555317761365&lt;span class=&quot;nt&quot;&gt;&amp;lt;/registrationTimestamp&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;lastRenewalTimestamp&amp;gt;&lt;/span&gt;1555317761365&lt;span class=&quot;nt&quot;&gt;&amp;lt;/lastRenewalTimestamp&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;evictionTimestamp&amp;gt;&lt;/span&gt;0&lt;span class=&quot;nt&quot;&gt;&amp;lt;/evictionTimestamp&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;serviceUpTimestamp&amp;gt;&lt;/span&gt;1555317761067&lt;span class=&quot;nt&quot;&gt;&amp;lt;/serviceUpTimestamp&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/leaseInfo&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;metadata&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;management.port&amp;gt;&lt;/span&gt;8090&lt;span class=&quot;nt&quot;&gt;&amp;lt;/management.port&amp;gt;&lt;/span&gt;
+        &lt;span class=&quot;nt&quot;&gt;&amp;lt;servicecomb-alpha-server&amp;gt;&lt;/span&gt;0.0.0.0:8080&lt;span class=&quot;nt&quot;&gt;&amp;lt;/servicecomb-alpha-server&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;/metadata&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;homePageUrl&amp;gt;&lt;/span&gt;http://10.50.8.23:8090/&lt;span class=&quot;nt&quot;&gt;&amp;lt;/homePageUrl&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;statusPageUrl&amp;gt;&lt;/span&gt;http://10.50.8.23:8090/actuator/info&lt;span class=&quot;nt&quot;&gt;&amp;lt;/statusPageUrl&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;healthCheckUrl&amp;gt;&lt;/span&gt;http://10.50.8.23:8090/actuator/health&lt;span class=&quot;nt&quot;&gt;&amp;lt;/healthCheckUrl&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;vipAddress&amp;gt;&lt;/span&gt;servicecomb-alpha-server&lt;span class=&quot;nt&quot;&gt;&amp;lt;/vipAddress&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;secureVipAddress&amp;gt;&lt;/span&gt;servicecomb-alpha-server&lt;span class=&quot;nt&quot;&gt;&amp;lt;/secureVipAddress&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;isCoordinatingDiscoveryServer&amp;gt;&lt;/span&gt;false&lt;span class=&quot;nt&quot;&gt;&amp;lt;/isCoordinatingDiscoveryServer&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;lastUpdatedTimestamp&amp;gt;&lt;/span&gt;1555317761365&lt;span class=&quot;nt&quot;&gt;&amp;lt;/lastUpdatedTimestamp&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;lastDirtyTimestamp&amp;gt;&lt;/span&gt;1555317760932&lt;span class=&quot;nt&quot;&gt;&amp;lt;/lastDirtyTimestamp&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;actionType&amp;gt;&lt;/span&gt;ADDED&lt;span class=&quot;nt&quot;&gt;&amp;lt;/actionType&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/instance&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;/application&amp;gt;&lt;/span&gt;
+&lt;span class=&quot;nt&quot;&gt;&amp;lt;/applications&amp;gt;&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;h3 id=&quot;配置-omega-端&quot;&gt;配置 Omega 端&lt;/h3&gt;
+
+&lt;blockquote&gt;
+  &lt;p&gt;ServiceComb Pack 0.4.0 Omega 默认依赖 Spring Boot 2.x Spring 和 Spring Cloud Netflix 2.x ，如果你的 Omega 端项目依赖 Spring Boot 1.x 你可以使用 &lt;code class=&quot;highlighter-rouge&quot;&gt;-Pspring-boot-1&lt;/code&gt; 参数重新编译 Spring Boot 1.x 和 Spring Cloud Netflix 1.x 的版本&lt;/p&gt;
+&lt;/blockquote&gt;
+
+&lt;p&gt;修改原有 omega 端项目&lt;/p&gt;
+
+&lt;p&gt;增加以下依赖&lt;/p&gt;
+
+&lt;div class=&quot;language-xml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;nt&quot;&gt;&amp;lt;dependency&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;groupId&amp;gt;&lt;/span&gt;org.apache.servicecomb.pack&lt;span class=&quot;nt&quot;&gt;&amp;lt;/groupId&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;artifactId&amp;gt;&lt;/span&gt;omega-spring-cloud-eureka-starter&lt;span class=&quot;nt&quot;&gt;&amp;lt;/artifactId&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;version&amp;gt;&lt;/span&gt;${pack.version}&lt;span class=&quot;nt&quot;&gt;&amp;lt;/version&amp;gt;&lt;/span&gt;
+&lt;span class=&quot;nt&quot;&gt;&amp;lt;/dependency&amp;gt;&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+
+&lt;p&gt;在 &lt;code class=&quot;highlighter-rouge&quot;&gt;application.yaml&lt;/code&gt; 添加下面的配置项&lt;/p&gt;
+
+&lt;div class=&quot;language-yaml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;na&quot;&gt;eureka&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;client&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+    &lt;span class=&quot;na&quot;&gt;service-url&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;defaultZone&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;http://127.0.0.1:8761/eureka&lt;/span&gt;
+&lt;span class=&quot;na&quot;&gt;alpha&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+  &lt;span class=&quot;na&quot;&gt;cluster&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+    &lt;span class=&quot;na&quot;&gt;register&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt;
+      &lt;span class=&quot;na&quot;&gt;type&lt;/span&gt;&lt;span class=&quot;pi&quot;&gt;:&lt;/span&gt; &lt;span class=&quot;s&quot;&gt;eureka&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/div&gt;
+&lt;ul&gt;
+  &lt;li&gt;
+    &lt;p&gt;&lt;code class=&quot;highlighter-rouge&quot;&gt;eureka.client.service-url.defaultZone&lt;/code&gt; 配置 Eureka 注册中心的地址，更多 Eureka 客户端配置可以参考&lt;a href=&quot;https://cloud.spring.io/spring-cloud-netflix/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter&quot;&gt;Spring Cloud Netflix 2.x&lt;/a&gt; 或 &lt;a href=&quot;https://cloud.spring.io/spring-cloud-netflix/1.4.x/multi/multi__service_discovery_eureka_clients.html#netflix-eureka-client-starter&quot;&gt;Spring Cloud Netflix 1.x&lt;/a&gt;&lt;/p&gt;
+  &lt;/li&gt;
+  &lt;li&gt;
+    &lt;p&gt;&lt;code class=&quot;highlighter-rouge&quot;&gt;alpha.cluster.register.type=eureka&lt;/code&gt; 配置 Omega 获取Alpha的方式是通过 Eureka 的注册中心&lt;/p&gt;
+  &lt;/li&gt;
+  &lt;li&gt;
+    &lt;p&gt;spring boot 版本兼容&lt;/p&gt;
+
+    &lt;p&gt;如果你的项目使用的不是 spring boot 2.1.1 版本，那么请参照此列表增加兼容的 spring-cloud-starter-consul-discovery 版本&lt;/p&gt;
+
+    &lt;table&gt;
+      &lt;thead&gt;
+        &lt;tr&gt;
+          &lt;th&gt;spring boot&lt;/th&gt;
+          &lt;th&gt;spring-cloud-starter-netflix-eureka-client&lt;/th&gt;
+        &lt;/tr&gt;
+      &lt;/thead&gt;
+      &lt;tbody&gt;
+        &lt;tr&gt;
+          &lt;td&gt;2.1.x.RELEASE&lt;/td&gt;
+          &lt;td&gt;2.1.1.RELEASE&lt;/td&gt;
+        &lt;/tr&gt;
+        &lt;tr&gt;
+          &lt;td&gt;2.0.x.RELEASE&lt;/td&gt;
+          &lt;td&gt;2.0.3.RELEASE&lt;/td&gt;
+        &lt;/tr&gt;
+      &lt;/tbody&gt;
+    &lt;/table&gt;
+
+    &lt;div class=&quot;language-xml highlighter-rouge&quot;&gt;&lt;div class=&quot;highlight&quot;&gt;&lt;pre class=&quot;highlight&quot;&gt;&lt;code&gt;&lt;span class=&quot;nt&quot;&gt;&amp;lt;dependencyManagement&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;dependencies&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;dependency&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;groupId&amp;gt;&lt;/span&gt;org.springframework.cloud&lt;span class=&quot;nt&quot;&gt;&amp;lt;/groupId&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;artifactId&amp;gt;&lt;/span&gt;spring-cloud-starter-netflix-eureka-client&lt;span class=&quot;nt&quot;&gt;&amp;lt;/artifactId&amp;gt;&lt;/span&gt;
+      &lt;span class=&quot;nt&quot;&gt;&amp;lt;version&amp;gt;&lt;/span&gt;2.0.3.RELEASE&lt;span class=&quot;nt&quot;&gt;&amp;lt;/version&amp;gt;&lt;/span&gt;
+    &lt;span class=&quot;nt&quot;&gt;&amp;lt;/dependency&amp;gt;&lt;/span&gt;
+  &lt;span class=&quot;nt&quot;&gt;&amp;lt;/dependencies&amp;gt;&lt;/span&gt;
+&lt;span class=&quot;nt&quot;&gt;&amp;lt;/dependencyManagement&amp;gt;&lt;/span&gt;
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;    &lt;/div&gt;
+  &lt;/li&gt;
+&lt;/ul&gt;</content><author><name>Zhang Lei</name><email>coolbeevip@gmail.com</email><uri>http://github.com/coolbeevip</uri></author><category term="ServiceComb Pack" /><category term="Spring Cloud Eureka" /><category term="Discovery" /><summary type="html">ServiceComb Pack 集成发现服务 Eureka</summary></entry></feed>
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+  
+</div>
+
+
+
+<div role="main" class="home-page">
+  <article class="splash" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <meta itemprop="description" content="Open-Source, Full-Stack Microservice Solution.With out of the box, high performance, compatible with popular ecology, multi-language support Download  Get started ">
+    
+    
+
+    <section class="page__content" itemprop="text">
+      
+<div class="feature__wrapper">
+
+  
+
+    
+
+    <div class="feature__item--center">
+      <div class="archive__item">
+        
+
+        <div class="archive__item-body">
+          
+
+          
+            <div class="archive__item-excerpt">
+              <div class="excerpt-title">Latest News</div>
+<style>left_ul li{width:100%} </style>
+<ul class="left_ul"> <li> <a href="/release/java-chassis-downloads/">Apache ServiceComb Java-Chassis Release Version 1.3.0</a> </li> <li> <a href="/release/service-center-downloads/">Apache ServiceComb Service-Center Release Version 1.3.0</a> </li> <li> <a href="/release/pack-downloads">Apache ServiceComb Pack 0.5.0 is released</a> </li> <li> <a href="/release/toolkit-downloads">Apache ServiceComb Toolkit 0.1.0 is released</a> </li> </ul>
+<ul> <li> <a href="/docs/servicecomb-accept-newcapec-institute-code-donation">Apache ServiceComb  accept code donation from NewCapec Institute</a> </li> <li> <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report">Apache ServiceComb Meetup and new projects release</a> </li> <li> <a href="">Apache ServiceComb won the first prize of China's outstanding open source project organized by China Open Source Cloud Alliance</a> </li> <li> <a href="/docs/chuanzhiboke-servicecomb-tutoria-release/">Apache ServiceComb community joint Itcast.cn sub-brand Itheima, Boxuegu and Wisdom Gathering release micro-service tutorial</a> </li> <li> <a href="https://gitter.im/ServiceCombUsers/Lobby">Welcome to join Apache ServiceComb community at Gitter</a> </li> </ul>
+
+            </div>
+          
+        </div>
+      </div>
+    </div>
+  
+
+</div>
+
+<div class="normal-feature-row">
+
+
+<div class="feature__wrapper">
+
+  
+
+    
+
+    <div class="feature__item">
+      <div class="archive__item">
+        
+          <div class="archive__item-teaser">
+            <a href="https://docs.servicecomb.io/java-chassis/en_US/build-provider/define-contract.html">
+            <img src="/assets/images/servicecomb-feature-openapi.png" alt="Standard" />
+            </a>
+          </div>
+        
+
+        <div class="archive__item-body">
+          
+            <a class="archive__item-title" href="https://docs.servicecomb.io/java-chassis/en_US/build-provider/define-contract.html">Service Contract</a>
+          
+
+          
+            <div class="archive__item-excerpt">
+              <p>Service contract guarantee based on <a href="https://www.openapis.org">OpenAPI</a></p>
+
+            </div>
+          
+        </div>
+      </div>
+    </div>
+  
+
+    
+
+    <div class="feature__item">
+      <div class="archive__item">
+        
+          <div class="archive__item-teaser">
+            <a href="/docs/quick-start/">
+            <img src="/assets/images/servicecomb-feature-quickstart.png" alt="Efficient" />
+            </a>
+          </div>
+        
+
+        <div class="archive__item-body">
+          
+            <a class="archive__item-title" href="/docs/quick-start/">Rapid Development</a>
+          
+
+          
+            <div class="archive__item-excerpt">
+              <p>One-click scaffolding, out of the box, speed up building of microservice applications</p>
+
+            </div>
+          
+        </div>
+      </div>
+    </div>
+  
+
+    
+
+    <div class="feature__item">
+      <div class="archive__item">
+        
+          <div class="archive__item-teaser">
+            
+            <img src="/assets/images/servicecomb-feature-multiLanguage.png" alt="MultiLanguage" />
+            
+          </div>
+        
+
+        <div class="archive__item-body">
+          
+            <a class="archive__item-title">Multiple Languages</a>
+          
+
+          
+            <div class="archive__item-excerpt">
+              <p>Ecological extension supports multiple development languages such as Java/Golang/PHP/NodeJS</p>
+
+            </div>
+          
+        </div>
+      </div>
+    </div>
+  
+
+</div>
+</div>
+
+    </section>
+  </article>
+</div>
+
+
+    <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
+    <div align="center" style="margin: 0 0;">
+    <ins class="adsbygoogle"
+         style="display:block; border-bottom: initial;"
+         data-ad-client="ca-pub-7328585512091257"
+         data-ad-slot="3049671934"
+         data-ad-format="auto"></ins>
+    </div>
+
+    <div class="page__footer">
+      <footer>
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+  <div class="row justify-content-md-center">
+    
+    <div class="col">
+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Get started</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_pages/home.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
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+  </div>
+</div>
+<div class="page__footer-bottom">
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+  <div>All other marks mentioned may be trademarks or registered trademarks of their respective owners.</div>
+</div>
+
+      </footer>
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+
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+</html>

content/licenses/LICENSE-fitvids

diff --git a/content/licenses/LICENSE-fitvids b/content/licenses/LICENSE-fitvids
new file mode 100644
index 0000000..24a7c9e
--- /dev/null
+++ b/content/licenses/LICENSE-fitvids
@@ -0,0 +1,13 @@
+DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+        Version 2, December 2004
+
+Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+Everyone is permitted to copy and distribute verbatim or modified
+copies of this license document, and changing it is allowed as long
+as the name is changed.
+
+DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+0. You just DO WHAT THE FUCK YOU WANT TO.

content/licenses/LICENSE-font-awesome

diff --git a/content/licenses/LICENSE-font-awesome b/content/licenses/LICENSE-font-awesome
new file mode 100644
index 0000000..28c1c4b
--- /dev/null
+++ b/content/licenses/LICENSE-font-awesome
@@ -0,0 +1,34 @@
+Font Awesome Free License
+-------------------------
+
+Font Awesome Free is free, open source, and GPL friendly. You can use it for
+commercial projects, open source projects, or really almost whatever you want.
+Full Font Awesome Free license: https://fontawesome.com/license.
+
+# Icons: CC BY 4.0 License (https://creativecommons.org/licenses/by/4.0/)
+In the Font Awesome Free download, the CC BY 4.0 license applies to all icons
+packaged as SVG and JS file types.
+
+# Fonts: SIL OFL 1.1 License (https://scripts.sil.org/OFL)
+In the Font Awesome Free download, the SIL OLF license applies to all icons
+packaged as web and desktop font files.
+
+# Code: MIT License (https://opensource.org/licenses/MIT)
+In the Font Awesome Free download, the MIT license applies to all non-font and
+non-icon files.
+
+# Attribution
+Attribution is required by MIT, SIL OLF, and CC BY licenses. Downloaded Font
+Awesome Free files already contain embedded comments with sufficient
+attribution, so you shouldn't need to do anything additional when using these
+files normally.
+
+We've kept attribution comments terse, so we ask that you do not actively work
+to remove them from files, especially code. They're a great way for folks to 
+learn about Font Awesome.
+
+# Brand Icons
+All brand icons are trademarks of their respective owners. The use of these
+trademarks does not indicate endorsement of the trademark holder by Font
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content/licenses/LICENSE-greedynav

diff --git a/content/licenses/LICENSE-greedynav b/content/licenses/LICENSE-greedynav
new file mode 100644
index 0000000..3aa74dd
--- /dev/null
+++ b/content/licenses/LICENSE-greedynav
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Luke Jackson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

content/licenses/LICENSE-jekyll-group-by-array

diff --git a/content/licenses/LICENSE-jekyll-group-by-array b/content/licenses/LICENSE-jekyll-group-by-array
new file mode 100644
index 0000000..e5d0751
--- /dev/null
+++ b/content/licenses/LICENSE-jekyll-group-by-array
@@ -0,0 +1,22 @@
+Copyright (c) 2015 Max White
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

content/licenses/LICENSE-jquery-smooth-scroll

diff --git a/content/licenses/LICENSE-jquery-smooth-scroll b/content/licenses/LICENSE-jquery-smooth-scroll
new file mode 100644
index 0000000..3ce400f
--- /dev/null
+++ b/content/licenses/LICENSE-jquery-smooth-scroll
@@ -0,0 +1,20 @@
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

content/licenses/LICENSE-magnific-popup

diff --git a/content/licenses/LICENSE-magnific-popup b/content/licenses/LICENSE-magnific-popup
new file mode 100644
index 0000000..da7ee0c
--- /dev/null
+++ b/content/licenses/LICENSE-magnific-popup
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2016 Dmitry Semenov, http://dimsemenov.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
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+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

content/licenses/LICENSE-minimal-mistakes

diff --git a/content/licenses/LICENSE-minimal-mistakes b/content/licenses/LICENSE-minimal-mistakes
new file mode 100644
index 0000000..afcb825
--- /dev/null
+++ b/content/licenses/LICENSE-minimal-mistakes
@@ -0,0 +1,63 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2018 Michael Rose and contributors
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+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
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+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
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+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
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+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+Minimal Mistakes incorporates icons from [The Noun Project](https://thenounproject.com/)
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+Font Awesome is distributed under the terms of the [SIL OFL 1.1](http://scripts.sil.org/OFL)
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+Copyright (c) 2017, Miriam Eric Suzanne.
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+Minimal Mistakes incorporates [GreedyNav.js](https://github.com/lukejacksonn/GreedyNav),
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+GreedyNav.js is distributed under the terms of the [MIT License](http://opensource.org/licenses/MIT).
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+Minimal Mistakes incorporates [Jekyll Group-By-Array](https://github.com/mushishi78/jekyll-group-by-array),
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+Minimal Mistakes incorporates [Lunr](http://lunrjs.com),
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content/licenses/LICENSE-prism

diff --git a/content/licenses/LICENSE-prism b/content/licenses/LICENSE-prism
new file mode 100644
index 0000000..528949f
--- /dev/null
+++ b/content/licenses/LICENSE-prism
@@ -0,0 +1,21 @@
+MIT LICENSE
+
+Copyright (c) 2012 Lea Verou
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

content/licenses/LICENSE-susy

diff --git a/content/licenses/LICENSE-susy b/content/licenses/LICENSE-susy
new file mode 100644
index 0000000..48c21e8
--- /dev/null
+++ b/content/licenses/LICENSE-susy
@@ -0,0 +1,28 @@
+Copyright (c) 2017, Miriam Eric Suzanne
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+    * Neither the name of the author nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

content/release/compatibleversion.html

diff --git a/content/release/compatibleversion.html b/content/release/compatibleversion.html
new file mode 100644
index 0000000..8606eff
--- /dev/null
+++ b/content/release/compatibleversion.html
@@ -0,0 +1,690 @@
+<!doctype html>
+<!--
+  Minimal Mistakes Jekyll Theme 4.4.1 by Michael Rose
+  Copyright 2017 Michael Rose - mademistakes.com | @mmistakes
+  Free for personal and commercial use under the MIT license
+  https://github.com/mmistakes/minimal-mistakes/blob/master/LICENSE.txt
+-->
+<html lang="en" class="no-js">
+  <head>
+    <meta charset="utf-8">
+
+<!-- begin SEO -->
+
+
+
+
+
+
+
+
+
+<title>ServiceComb Releases Compatibility - Apache ServiceComb</title>
+
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+
+<meta name="description" content="ServiceComb Compatibility">
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+<meta property="og:site_name" content="Apache ServiceComb">
+<meta property="og:title" content="ServiceComb Releases Compatibility">
+
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+  <meta property="og:url" content="https://github.com/pages/apache/incubator-servicecomb-website/release/compatibleversion">
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+  <meta property="og:description" content="ServiceComb Compatibility">
+
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+  <meta name="twitter:site" content="@ServiceComb">
+  <meta name="twitter:title" content="ServiceComb Releases Compatibility">
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+  <meta name="twitter:url" content="">
+
+  
+    <meta name="twitter:card" content="summary">
+    
+  
+
+  
+
+
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+  
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+  
+
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+
+
+
+
+
+
+  <script type="application/ld+json">
+    {
+      "@context" : "http://schema.org",
+      "@type" : "Person",
+      "name" : "Apache ServiceComb",
+      "url" : "https://github.com/pages/apache/incubator-servicecomb-website",
+      "sameAs" : null
+    }
+  </script>
+
+
+
+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
+
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+
+
+<!-- end SEO -->
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+<script src="/assets/vendor/prism/prism.js"></script>
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+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
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+      padding-right: 3em;
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+  </style>
+<![endif]-->
+
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+<!-- insert favicons. use http://realfavicongenerator.net/ -->
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+<script src="/assets/js/custom.js"></script>
+<!-- end custom head snippets -->
+
+  </head>
+
+  <body class="layout--single">
+
+    <!--[if lt IE 9]>
+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->
+    <div class="masthead" onmouseleave="$('#childrenShow').css('display', 'none')">
+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/">Home</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/developers/">Projects</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+            <li class="def-nav-li" onmouseenter="$('#childrenShow').css('display', 'block')">
+              
+              
+              
+
+              
+                <a href="/docs/users/">Documentation</a>
+              
+
+              <ul id="childrenShow" class="def-children-show" onmouseleave="$('#childrenShow').css('display', 'none')">
+                
+                <li><a href="/docs/getting-started/" class="">Get started</a></li>
+                
+                <li><a href="/docs/users/" class="">Docs</a></li>
+                
+                <li><a href="/slides/" class="">Video</a></li>
+                
+                <li><a href="/faqs/" class="">FAQ</a></li>
+                
+              </ul>
+            </li>
+          
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/developers/contributing">Community</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/year-archive/">Blogs</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a class="active" href="/release/">Downloads</a>
+                
+              </li>
+            
+          
+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
+          
+            
+            <a href=/cn/release/compatibleversion>中文</a>
+          
+        </div>
+      </nav>
+    </div>
+  </div>
+</div>
+
+
+    
+
+
+
+<div id="main" role="main">
+  
+  <div class="sidebar sticky">
+      
+      <div class="back-to-home"><a href="/">Home</a> > ServiceComb Releases Compatibility</div>
+      
+  
+  
+    
+      
+      
+      
+    
+    
+      
+
+<nav class="nav__list">
+  
+  <input id="ac-toc" name="accordion-toc" type="checkbox" />
+  <label for="ac-toc">Toggle Menu</label>
+  <ul class="nav__items">
+    
+      <li>
+        
+          <span class="nav__sub-title">Service-Center</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/service-center-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/service-center-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Kie</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/kie-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/kie-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Java-Chassis</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/java-chassis-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/java-chassis-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Mesher</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/mesher-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/mesher-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/pack-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/pack-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Toolkit</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/toolkit-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/toolkit-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/saga-actuator-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/saga-actuator-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/saga-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/saga-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Releases Compatibility">
+    <meta itemprop="description" content="ServiceComb Compatibility">
+    
+    <meta itemprop="dateModified" content="June 21, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Releases Compatibility
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Here is the list of compatible version for Java-Chassis and Service-Center</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>Java-Chassis</th>
+      <th>Service-Center</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>Java-Chassis-1.1.0</td>
+      <td>Service-Center-1.1.0 or above</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-1.0.0</td>
+      <td>Service-Center-1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-1.0.0-m2</td>
+      <td>Service-Center-1.0.0m2</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-1.0.0-m1</td>
+      <td>Service-Center-1.0.0m1 or above</td>
+    </tr>
+    <tr>
+      <td>Java-Chassis-0.5.0</td>
+      <td>Service-Center-0.5.0</td>
+    </tr>
+  </tbody>
+</table>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
+        
+
+
+        
+      </footer>
+
+      
+
+      
+
+    </div>
+
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+  </article>
+
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+  
+</div>
+
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+    <div align="center" style="margin: 0 0;">
+    <ins class="adsbygoogle"
+         style="display:block; border-bottom: initial;"
+         data-ad-client="ca-pub-7328585512091257"
+         data-ad-slot="3049671934"
+         data-ad-format="auto"></ins>
+    </div>
+
+    <div class="page__footer">
+      <footer>
+        <!-- start custom footer snippets -->
+
+<!-- end custom footer snippets -->
+
+        <div class="container">
+  <div class="row justify-content-md-center">
+    
+    <div class="col">
+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Get started</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Slides</a></li>
+        <li><a href="/users/faq/">Common Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_release/compatible_version.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
+        </li>
+      </ul>
+    </div>
+  </div>
+</div>
+<div class="page__footer-bottom">
+  <div>&copy; 2019 Apache ServiceComb. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>
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+
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+
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+  ga('send', 'pageview');
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+
+  </body>
+</html>

content/release/index.html

diff --git a/content/release/index.html b/content/release/index.html
new file mode 100644
index 0000000..19fc658
--- /dev/null
+++ b/content/release/index.html
@@ -0,0 +1,752 @@
+<!doctype html>
+<!--
+  Minimal Mistakes Jekyll Theme 4.4.1 by Michael Rose
+  Copyright 2017 Michael Rose - mademistakes.com | @mmistakes
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+    <meta charset="utf-8">
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+
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+<meta property="og:site_name" content="Apache ServiceComb">
+<meta property="og:title" content="ServiceComb Releases">
+
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+  <link rel="canonical" href="https://github.com/pages/apache/incubator-servicecomb-website/release/">
+  <meta property="og:url" content="https://github.com/pages/apache/incubator-servicecomb-website/release/">
+
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+  <meta property="og:description" content="ServiceComb Releases">
+
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+  <meta name="twitter:site" content="@ServiceComb">
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+  <script type="application/ld+json">
+    {
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+      "@type" : "Person",
+      "name" : "Apache ServiceComb",
+      "url" : "https://github.com/pages/apache/incubator-servicecomb-website",
+      "sameAs" : null
+    }
+  </script>
+
+
+
+  <meta name="google-site-verification" content="HvJjNd7vvJ-yjSTHlBiIWEYxp_Hrz-PYEY5Idz9LRcA" />
+
+
+
+
+<!-- end SEO -->
+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
+<!-- http://t.co/dKP3o1e -->
+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+<script>
+  document.documentElement.className = document.documentElement.className.replace(/\bno-js\b/g, '') + ' js ';
+</script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>
+<script src="/assets/vendor/prism/prism.js"></script>
+
+<script type="text/javascript" async
+  src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML">
+</script>
+
+<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
+
+<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>
+<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
+<!-- For all browsers -->
+<link rel="stylesheet" href="/assets/css/main.css?v=1">
+<link rel="stylesheet" href="/assets/vendor/prism/prism.css?v=1">
+
+<!--[if lte IE 9]>
+  <style>
+    /* old IE unsupported flexbox fixes */
+    .greedy-nav .site-title {
+      padding-right: 3em;
+    }
+    .greedy-nav button {
+      position: absolute;
+      top: 0;
+      right: 0;
+      height: 100%;
+    }
+  </style>
+<![endif]-->
+
+<meta http-equiv="cleartype" content="on">
+
+    <!-- start custom head snippets -->
+
+<!-- insert favicons. use http://realfavicongenerator.net/ -->
+<link href="https://fonts.cat.net/css?family=Roboto:400,500,700|Source+Code+Pro" rel="stylesheet">
+<script src="/assets/js/custom.js"></script>
+<!-- end custom head snippets -->
+
+  </head>
+
+  <body class="layout--single">
+
+    <!--[if lt IE 9]>
+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->
+    <div class="masthead" onmouseleave="$('#childrenShow').css('display', 'none')">
+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/">Home</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+              <li class="masthead__menu-item" onmouseenter="$('#childrenShow').css('display', 'none')">
+                
+                  <a href="/developers/">Projects</a>
+                
+              </li>
+            
+          
+            
+          
+          
+            
+            <li class="def-nav-li" onmouseenter="$('#childrenShow').css('display', 'block')">
+              
+              
+              
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+  <ul class="nav__items">
+    
+      <li>
+        
+          <span class="nav__sub-title">Service-Center</span>
+        
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Releases">
+    <meta itemprop="description" content="ServiceComb Releases">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Releases
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p>Use the links below to download the ServiceComb toolkits releases from one of our mirrors. You must verify the integrity of the downloaded files using signatures downloaded from our main distribution directory.</p>
+
+<p>Only current recommended releases are available on the main distribution site and its mirrors.</p>
+
+<p><strong>Stable Release - Latest Version:</strong></p>
+
+<ul>
+  <li>
+    <p><a href="/release/service-center-downloads/">ServiceComb Service-Center 1.3.0</a> (released on 2019-11-07)</p>
+  </li>
+  <li>
+    <p><a href="/release/toolkit-downloads/">ServiceComb toolkit 0.1.0</a> (released on 2019-09-04)</p>
+  </li>
+  <li>
+    <p><a href="/release/pack-downloads/">ServiceComb Pack 0.5.0</a> (released on 2019-08-26)</p>
+  </li>
+  <li>
+    <p><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.3.0</a> (released on 2019-10-31)</p>
+  </li>
+  <li>
+    <p><a href="/release/saga-actuator-downloads/">ServiceComb Saga Actuator 0.3.0</a> (released on 2018-12-18)</p>
+  </li>
+  <li>
+    <p><a href="/release/saga-downloads/">ServiceComb Saga 0.2.1</a> (released on 2018-11-23)</p>
+  </li>
+  <li>
+    <p><a href="/release/mesher-downloads/">ServiceComb Mesher 1.6.3</a> (released on 2019-9-9)</p>
+  </li>
+  <li>
+    <p><a href="/release/kie-downloads/">ServiceComb Kie 0.1.0</a> (released on 2019-10-26)</p>
+  </li>
+</ul>
+
+<p><strong>Earlier Releases :</strong></p>
+<ul>
+  <li><a href="/release/service-center-downloads/">ServiceComb Service-Center 1.2.0</a> (released on 2019-04-06)</li>
+  <li><a href="/release/service-center-downloads/">ServiceComb Service-Center 1.1.0</a> (released on 2018-11-30)</li>
+  <li><a href="/release/service-center-downloads/">ServiceComb Service-Center 1.0.0</a> (released on 2018-08-02)</li>
+  <li><a href="/release/service-center-downloads/">ServiceComb Service-Center 1.0.0-m2</a> (released on 2018-06-21)</li>
+  <li>
+    <p><a href="/release/service-center-downloads/">ServiceComb Service-Center 1.0.0-m1</a> (released on 2018-03-27)</p>
+  </li>
+  <li><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.2.1</a> (released on 2019-05-19)</li>
+  <li><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.2.0</a> (released on 2019-04-12)</li>
+  <li><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.1.0</a> (released on 2018-11-30)</li>
+  <li><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.0.0</a> (released on 2018-08-02)</li>
+  <li><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.0.0-m2</a> (released on 2018-06-21)</li>
+  <li>
+    <p><a href="/release/java-chassis-downloads/">ServiceComb Java-Chassis 1.0.0-m1</a> (released on 2018-04-02)</p>
+  </li>
+  <li><a href="/release/pack-downloads/">ServiceComb Pack 0.4.0</a> (released on 2019-04-06)</li>
+  <li><a href="/release/pack-downloads/">ServiceComb Pack 0.3.0</a> (released on 2019-01-02)</li>
+  <li><a href="/release/saga-downloads/">ServiceComb Saga 0.2.0</a> (released on 2018-06-21)</li>
+  <li><a href="/release/saga-downloads/">ServiceComb Saga 0.1.0</a> (released on 2018-03-27)</li>
+</ul>
+
+<p><strong>NOTE:</strong></p>
+<ul>
+  <li>Please check <a href="/release/compatibleversion">this page</a> for compatible version.</li>
+</ul>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg -import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb********.asc apache-servicecomb*********
+
+or
+
+pgpv apache-servicecomb********.asc
+
+or
+
+pgp apache-servicecomb********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/">repo</a> and verify the downloads using sha512sum or shasum.</p>
+
+        
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content/release/java-chassis-downloads/index.html

diff --git a/content/release/java-chassis-downloads/index.html b/content/release/java-chassis-downloads/index.html
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+            <h1 class="page__title" itemprop="headline">ServiceComb Java-Chassis Downloads
+</h1>
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+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Distribution</th>
+      <th>Recommended Version of Service-Center</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Java-Chassis 1.3.0 (Latest)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.3.0/apache-servicecomb-java-chassis-distribution-1.3.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Java-Chassis 1.2.1</td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.1/apache-servicecomb-java-chassis-distribution-1.2.1-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Java-Chassis 1.2.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.2.0/apache-servicecomb-java-chassis-distribution-1.2.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Java-Chassis 1.1.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-java-chassis/1.1.0/apache-servicecomb-java-chassis-distribution-1.1.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Java-Chassis 1.0.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Java-Chassis 1.0.0-m2</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m2/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m2-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0-m2</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Java-Chassis 1.0.0-m1</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-java-chassis/1.0.0-m1/apache-servicecomb-incubating-java-chassis-distribution-1.0.0-m1-bin.zip.sha512">[sha512]</a></td>
+      <td>Service-Center 1.0.0-m1</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-java-chassis-********.asc apache-servicecomb-java-chassis-*********
+
+or
+
+pgpv apache-servicecomb-java-chassis-********.asc
+
+or
+
+pgp apache-servicecomb-java-chassis-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-java-chassis/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
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+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.3.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1304">SCB-1304</a>] -         FallbackPolicy interface support returns an exception
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1305">SCB-1305</a>] -         CseAsyncRestTemplate is not support set headers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1306">SCB-1306</a>] -         When the request body of VertxServerRequestToHttpServletRequest is modified, the field VertxServerRequestToHttpServletRequest#inputStream should be set to null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1318">SCB-1318</a>] -         There may be memory leak in RSAProviderTokenManager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1390">SCB-1390</a>] -         quick start java-chassis samples bmi has some errors
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1475">SCB-1475</a>] -         ServiceCombServerStats.getFailedRate may arise an  exception of java.lang.ArithmeticException: / by zero under concurrency scenarios
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1511">SCB-1511</a>] -         when use method override, the generated swagger body is wrong
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1513">SCB-1513</a>] -         merge config items according to priority
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1520">SCB-1520</a>] -         using RPC and when first paramter type is Object, the second parameter value will be null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1543">SCB-1543</a>] -         java-chassis dependency structure is wrong and compile fail in clean environment
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1274">SCB-1274</a>] -         when service center is unavailable, service should enter safe mode.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1278">SCB-1278</a>] -         ServiceComb related headers are not exposed to 3rd party services by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1287">SCB-1287</a>] -         refactor edge dispatcher to make them more extensible
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1291">SCB-1291</a>] -         Support rest interface method overriding by @ApiOperation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1297">SCB-1297</a>] -         Print warn log about config resolving failure while fetching config from Spring Environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1308">SCB-1308</a>] -         Improve instance isolation mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1392">SCB-1392</a>] -         If Multiple java bean param types are given the same name by using @ApiModel, there should be error tips in microservice&#39;s booting log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1402">SCB-1402</a>] -         BeanUtils.getImplClassFromBean can not return correctly info in cglib proxy situation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1405">SCB-1405</a>] -         support maxWaitQueueSize setting in RestTransportClient
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1407">SCB-1407</a>] -         Add new field when print provideCache log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1431">SCB-1431</a>] -         set all dependency version as properties in java-chasis-dependencies
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1434">SCB-1434</a>] -         add a springboot2 archetype
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1437">SCB-1437</a>] -         Upgrading third party dependency versions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1448">SCB-1448</a>] -         support class inheritance and interface inheritance with template type
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1450">SCB-1450</a>] -         Microservice instance may get stuck when watch connection to sc is recovered and pulling instance action is executed in eventloop thread
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1451">SCB-1451</a>] -         Printing the service information on the log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1457">SCB-1457</a>] -         delete no use code in ProtobufManager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1461">SCB-1461</a>] -         servicecomb.service.registry.client.workerPoolSize hasn&#39;t display the real role that it has announce by its name.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1462">SCB-1462</a>] -         Two properties has been required by fix SCB-1450.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1488">SCB-1488</a>] -         Upgrading protobuf version to 3.7.1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1492">SCB-1492</a>] -         Allow users to custom the ObjectMapper used in Swagger schema generation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1494">SCB-1494</a>] -         Optimizing log when starting a new microservice
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1515">SCB-1515</a>] -         use jdk 8 compiler for the Travis-CI of java-chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1516">SCB-1516</a>] -         Upgrade third-party dependency versions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1522">SCB-1522</a>] -         Add &quot;Why use Java Chassis&quot; introduction into README
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1523">SCB-1523</a>] -         Stopping retrying another server when no server available
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1524">SCB-1524</a>] -         support register schema when old schema already exists
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1525">SCB-1525</a>] -         print codec error stack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1528">SCB-1528</a>] -         Optimizing some code implementations
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1544">SCB-1544</a>] -         default metrics printer should not print 0 operations
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.2.1
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1088">SCB-1088</a>] -         SDK IsolationServerEvent is missing endpoint information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1251">SCB-1251</a>] -         reduce configuration inject callback
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1253">SCB-1253</a>] -         Adjust the priority of FailureHandler of the dispatchers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1260">SCB-1260</a>] -         inspector online test with servlet.urlPattern cause 404
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1266">SCB-1266</a>] -         ScbMarker work with log4j2 will cause log4j2 leak instance of Marker
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1280">SCB-1280</a>] -         Fix problem with nested generic list param like List&lt;List&lt;String&gt;&gt;
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1229">SCB-1229</a>] -         update the version of dependency
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1250">SCB-1250</a>] -         make ArchaiusUtils simpler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1259">SCB-1259</a>] -         response type support Optional
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1265">SCB-1265</a>] -         Add doc about maxHeaderSize configuration
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1246">SCB-1246</a>] -         EventBus subscriber support order
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1262">SCB-1262</a>] -         change 1.2.0-SNAPSHOT to 1.3.0-SNAPSHOT in pom.xml
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1263">SCB-1263</a>] -         forward request in edge should not inherit cse-context
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.2.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-353">SCB-353</a>] -         Support Servicecomb metrics with statics during a long time
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-837">SCB-837</a>] -         add http2 special configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-945">SCB-945</a>] -         enhance swagger to idl to support method parameter/result/List&lt;List&gt;/List&lt;Map&gt;/Map&lt;List&gt;/Map&lt;Map&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-946">SCB-946</a>] -         serialize/deseriaze List&lt;List&lt;X&gt;&gt;/List&lt;Map&lt;X, Y&gt;&gt;/Map&lt;X, List&lt;Y&gt;&gt;/Map&lt;X, Map&lt;Y, Z&gt;&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1071">SCB-1071</a>] -         serialize/deserialize array and primitives
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1144">SCB-1144</a>] -         change samples use log4j2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1153">SCB-1153</a>] -         provide traceId-invocationId by marker mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1162">SCB-1162</a>] -         document for PriorityProperty/InjectProperties/InjectProperty
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1175">SCB-1175</a>] -         document for basic configuration rule
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1188">SCB-1188</a>] -         provide a way to view/convert and download schemas
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-781">SCB-781</a>] -         support @ConfigurationProperties with Apollo.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-968">SCB-968</a>] -         [SCB-968] http2 do not support pump download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1054">SCB-1054</a>] -         when download file, we should ignore consumer acceptType
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1065">SCB-1065</a>] -         when request not contain traceId,should use provider&#39;s invocation&#39;s traceId
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1066">SCB-1066</a>] -         when start error, destroy method may throw an exception lead to origin exception losed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1073">SCB-1073</a>] -         StaticMicroserviceVersions should be ignored while checking instance cache
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1088">SCB-1088</a>] -         SDK IsolationServerEvent is missing endpoint information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1089">SCB-1089</a>] -         Fix PrometheusPublisher naming error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1095">SCB-1095</a>] -         Timer task need catch all throwable to protected from unexpected error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1096">SCB-1096</a>] -         [SCB-1096]change the method calculate process cpu rate  to same with top
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1102">SCB-1102</a>] -         fix empty swagger and information leak problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1108">SCB-1108</a>] -         when timeout, the access log status is 200
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1109">SCB-1109</a>] -         local-service-registry sample of java-chassis can not run directly 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1114">SCB-1114</a>] -         upgrade zipkin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1115">SCB-1115</a>] -         fix not standard protostuff javadoc @Created
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1126">SCB-1126</a>] -         springmvc project generated by ServiceComb scaffold can not run
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1129">SCB-1129</a>] -         @JsonProperty on enum value is ignored
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1141">SCB-1141</a>] -         latest versionRule can not update to new version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1143">SCB-1143</a>] -         Servicecomb support watch service center with auth headers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1156">SCB-1156</a>] -         avoid collect wrong invocation stage data when rest invoke failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1191">SCB-1191</a>] -         NPE When return type is ResponseEntity&lt;Void&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1224">SCB-1224</a>] -         [SCB-1224] az affinity is conflict with empty instance protection
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1226">SCB-1226</a>] -         there are problems when request rejected by thread pool queue full
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1230">SCB-1230</a>] -         avoid throw exception in httpClientResponse.exceptionHandler
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1048">SCB-1048</a>] -         Provide a way to configure bootstrap information in Cloud Native enviroment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1061">SCB-1061</a>] -         Provide a way to using handlers(e.g. LoabalanceHanler) outside handler chain
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-674">SCB-674</a>] -         protobuf codec based on idl from swagger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1037">SCB-1037</a>] -         in vertx 3.6.0, PumpImpl do not support &quot;&quot;, it will throw exception
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1044">SCB-1044</a>] -         add current process CPU rate  and net packets in the metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1047">SCB-1047</a>] -         microservice.yaml  service_description.version support format xxx.xx.xxx.xxx
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1051">SCB-1051</a>] -         when interface set produces=text/plain;charset=utf-8. and consumers set accept = text/plain,will cause error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1056">SCB-1056</a>] -         Put provider QPS flow control in front
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1063">SCB-1063</a>] -         Improve the time cost when first time loading schema
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1068">SCB-1068</a>] -         As a developer want to know instance detail info when instance isolation 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1072">SCB-1072</a>] -         change dependency management version to project.version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1074">SCB-1074</a>] -         minor fixes for mistakes and logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1075">SCB-1075</a>] -         upgrade spring-framework to 4.3.20.RELEASE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1076">SCB-1076</a>] -         upgrade guava to 25.1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1077">SCB-1077</a>] -         upgrade hystrix to 1.5.12
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1079">SCB-1079</a>] -         allow consumer-id to be empty when query instance
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1101">SCB-1101</a>] -         ServiceComb-Java-Chassis support IPv6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1106">SCB-1106</a>] -         isolation must make sure one of instances is available
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1135">SCB-1135</a>] -         Add client max receive header size config item
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1139">SCB-1139</a>] -         Upgrade Vert.x to 3.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1146">SCB-1146</a>] -         update PR template
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1157">SCB-1157</a>] -         spring-boot2-starter-discovery and spring-boot-starter-discovery depend on zuul is not correct
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1170">SCB-1170</a>] -         improve log of upload directory during boot.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1177">SCB-1177</a>] -         update vertx to 3.6+ version to result .vertx directory was default created 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1178">SCB-1178</a>] -         In the unit test, the issue of assertEquals and Float.MAX_VALUE.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1179">SCB-1179</a>] -         Optimize the mainclass auto-discovery logic to cover more scenes.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1185">SCB-1185</a>] -         Log DNS related exception to help locate problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1186">SCB-1186</a>] -         add a common pom module to simplify user configurations
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1193">SCB-1193</a>] -         upgread spring boot versions and add easy to use dependency management
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1202">SCB-1202</a>] -         pump down with vertx3.6.3 no need to check buff length in AsynFileImpl#doWrite
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1205">SCB-1205</a>] -         improve edge forward http2 request
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1206">SCB-1206</a>] -         sort schemas in inspector ui
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1208">SCB-1208</a>] -         improve slow invocation logger: log remote address
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1210">SCB-1210</a>] -         improve the average latency precision of the metrics log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1211">SCB-1211</a>] -         avoid  create multiple caches for different expression of one versionRule 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1220">SCB-1220</a>] -         Support regex path param on consumer side
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1222">SCB-1222</a>] -         change groupId of &quot;hibernate-validator&quot; from &quot;org.hibernate&quot; to &quot;org.hibernate.validator&quot;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1239">SCB-1239</a>] -         close thread after finish unit test case at once.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1240">SCB-1240</a>] -         allowed one prometheus cluster support multiple apps
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-291">SCB-291</a>] -         delete old useless configuration mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-594">SCB-594</a>] -         Create a document description for https://github.com/apache/incubator-servicecomb-java-chassis/pull/704
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-638">SCB-638</a>] -         create mechanism for read config item by priority 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1046">SCB-1046</a>] -         file upload support file array for the same name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1062">SCB-1062</a>] -         Update the project development version to 1.2.0-SNAPSHOT
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1083">SCB-1083</a>] -         support test before provide service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1134">SCB-1134</a>] -         change default verticle instance count
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1136">SCB-1136</a>] -         change default settings of sync executor
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1147">SCB-1147</a>] -         log invocation stage trace information if too slow
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1148">SCB-1148</a>] -         read transport configuration from model
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1163">SCB-1163</a>] -         Support spring-cloud-gateway 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1165">SCB-1165</a>] -         filter bridge methods when generate swagger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1184">SCB-1184</a>] -         upgrade swagger from 1.5.12 to 1.5.22 to support convert swagger to html
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1192">SCB-1192</a>] -         add &quot;metrics&quot; prefix to slow invocation configuration 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1218">SCB-1218</a>] -         Prepare 1.2.0 Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1221">SCB-1221</a>] -         add missed modules to distribution and adjust orders
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1231">SCB-1231</a>] -         add queue meter of http client connection pool 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1232">SCB-1232</a>] -         make GroupExecutor configuration compatible to old version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1237">SCB-1237</a>] -         improve default thread pool strategy
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.1.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-493">SCB-493</a>] -         parameters and DefaultLogPublisher optimize
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-675">SCB-675</a>] -         generate protobuf idl from swagger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-681">SCB-681</a>] -         jackson protobuf support v3 specification: map/list/array
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-687">SCB-687</a>] -         highway server not accept too many connection
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-691">SCB-691</a>] -         add vertx server/ rest client/highway client/ highway server connection meter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-790">SCB-790</a>] -         support create new target microservice instance in one node
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-793">SCB-793</a>] -         run it-consumer during travis CI 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-842">SCB-842</a>] -         jackson protobuf serializer have performance problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-843">SCB-843</a>] -         add http client pool request time to consumer invocation meter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-881">SCB-881</a>] -         add more invocation stage measurement
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-894">SCB-894</a>] -         measure httpServer and httpClient
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-917">SCB-917</a>] -         parse proto file to model
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-918">SCB-918</a>] -         serialize/deserialize based on proto model
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-922">SCB-922</a>] -         collect Getter/Setter from pojo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-947">SCB-947</a>] -         delete old jackson protobuf logic
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-948">SCB-948</a>] -         convert proto model to string
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1001">SCB-1001</a>] -         [vertx] downloading, client disconnect first, should close WriteStream right now.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1021">SCB-1021</a>] -         add vertx client/server meters to metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1022">SCB-1022</a>] -         measure tcpServer and tcpClient
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1034">SCB-1034</a>] -         metrics performance optimize
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-74">SCB-74</a>] -         POJO static method is export as an operation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-381">SCB-381</a>] -         Fix foudation-vertx UT failure on linux
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-769">SCB-769</a>] -         When delay fault injection is enabled, the business thread will be blocked 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-774">SCB-774</a>] -         Unexpected warn log is printed while the service is exiting if there are reactive operations
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-780">SCB-780</a>] -         sessionstickrule add the judgement of whether lastServer can also be accessed.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-787">SCB-787</a>] -         Server States not clean unavailable server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-794">SCB-794</a>] -         Edge invocation do not properly send servlet filter response code
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-799">SCB-799</a>] -         fix problem about &quot;mvn install&quot; in ubuntu
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-800">SCB-800</a>] -         Param order generated by BeanParamAnnotationProcessor is not stable
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-802">SCB-802</a>] -         in rollback scenario, old versions meta is used and invocation is fail
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-810">SCB-810</a>] -         fix zipkin dependency
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-828">SCB-828</a>] -         In some tomcat implementation inputstream available is null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-845">SCB-845</a>] -         some times download file can not get correct content
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-849">SCB-849</a>] -         refactor producer connection limit using vertx metrics spi mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-861">SCB-861</a>] -         lost response type of @ApiResponse 490/590
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-886">SCB-886</a>] -         Path param is not encoded and decoded correctly
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-888">SCB-888</a>] -         switch SCBEngine status to up in the wrong time
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-895">SCB-895</a>] -         When json parse fail will not get 400 but 590
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-898">SCB-898</a>] -         Governance function is not effective when configuration Start with servicecomb
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-904">SCB-904</a>] -         SpringMVC @RequestHeader do not support value,only support name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-905">SCB-905</a>] -         Request connection is hang up when request path contains illegal string
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-910">SCB-910</a>] -         Java Chassis support spring boot 2.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-956">SCB-956</a>] -         not support body to be a enum
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-959">SCB-959</a>] -         When parsing inner classes，CtType will throw NotFoundException
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-960">SCB-960</a>] -         when consumer local failed(eg: LB failed), CompletableFuture callback can not get InvocationContext
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-964">SCB-964</a>] -         Fix MediaType setting problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-965">SCB-965</a>] -         resolve DoS attack problem about enum/char/Character/byte/Byte/short/Short/int/Integer/long/Long/float/Float/double/Double
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-972">SCB-972</a>] -         Using SHA1 signature key as UUID of micro service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1007">SCB-1007</a>] -         not support CustomGeneric&lt;Map&lt;KEY, VALUE&gt;&gt;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1012">SCB-1012</a>] -         add NoRouteToHostException in retry&#39;s exception
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1014">SCB-1014</a>] -         Fix priority problem of ExceptionToResponseConverter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1043">SCB-1043</a>] -         MicroserviceVersions.safeSetInstances lost exception message
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1045">SCB-1045</a>] -         fix sample spring bean declaring
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-215">SCB-215</a>] -         support annotation ApiParam
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-775">SCB-775</a>] -         support invoke service using raw type like JsonObject
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-777">SCB-777</a>] -         Support @BeanParam annotation in JAX-RS developing style
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-778">SCB-778</a>] -         In tomcat, support register swagger base path with container prefix
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-786">SCB-786</a>] -         when instances cache is not sync to SC caused by bug, auto fix it.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-788">SCB-788</a>] -         public key black/white add feature: choose server by microservice field  and properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-847">SCB-847</a>] -         Provide a way to decode user&#39;s custom error data
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-880">SCB-880</a>] -         Give an option to query parameter convert empty to null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-903">SCB-903</a>] -         Add a feature to serialize/deserialize using Object to avoid information lose
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-926">SCB-926</a>] -         Invoke 3rd party service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-936">SCB-936</a>] -         Encoded slash &#39;/&#39; is decoded in EdgeService, causing 404 error response
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-967">SCB-967</a>] -         support configed ip send request
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1009">SCB-1009</a>] -         Supporting configure encrypted password for proxy settings
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1040">SCB-1040</a>] -         Support discover instances from ServiceCenter Aggregator
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-206">SCB-206</a>] -         Support @Api to specify produces and consumes
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-711">SCB-711</a>] -         HTTP2 and other client should be lasy initialized 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-747">SCB-747</a>] -         add jaxrs upload file demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-795">SCB-795</a>] -         update jackson from 2.9.5 to 2.9.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-827">SCB-827</a>] -         Add response decode error log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-832">SCB-832</a>] -         modify the errorThresholdPercentage from 20 to 0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-833">SCB-833</a>] -         Provide a retry mechanism to meet upgrade no interrupt
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-870">SCB-870</a>] -         Refractor loadbalancer rule to not use IRule to give more control
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-873">SCB-873</a>] -         Make the validation result display the parameter name instead of arg0, arg1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-887">SCB-887</a>] -         aysnc servlet timeout is too short and may block container pool when tasks are timeout
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-889">SCB-889</a>] -         add SCBEngine reference to BootEvent
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-897">SCB-897</a>] -         Support config rest server max initial line length
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-911">SCB-911</a>] -         Timeout scenario print too many logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-931">SCB-931</a>] -         upgrade vert.x to fix some know issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-933">SCB-933</a>] -         Revert changes to RestObjectMapper that fail on primitive types not present
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-943">SCB-943</a>] -         make ProduceJsonProcessor,DefaultHttpClientFilter,ServerRestArgsFilter changable
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-954">SCB-954</a>] -         improve consumer stage time record when failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-961">SCB-961</a>] -         Isolation provide a way to isolate for at least a moment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-975">SCB-975</a>] -         Improve retry rule
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-979">SCB-979</a>] -         Add reminder log on the selection of SwaggerGeneratorContext
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-982">SCB-982</a>] -         Show the warning message in maven compile plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-985">SCB-985</a>] -         Add springboot2-starter-discovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-986">SCB-986</a>] -         ServerInstances can be cached in spring-boot2-starter-discovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-987">SCB-987</a>] -         delete spring 3 related declaring
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-989">SCB-989</a>] -         scan RestController to to make springmvc controller publish as ServiceComb Rest easier
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-996">SCB-996</a>] -         When retries fail, return the last error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1020">SCB-1020</a>] -         No need unregister when bootup failure before register service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1031">SCB-1031</a>] -         The Response&#39;s properties was overrided wrong between @APIOperation and @Resoponse on the controller method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1038">SCB-1038</a>] -         Fix some bugs and logs improvement reported by users when testing
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-612">SCB-612</a>] -         delete useless MicroserviceMetaManager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-736">SCB-736</a>] -         generate default value to swagger for primitive type, even there is no defaultValue annotation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-854">SCB-854</a>] -         BootListener support load by not only spring bean, but also SPI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-859">SCB-859</a>] -         generate traceId when create invocation for consumer/producer/edge
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-882">SCB-882</a>] -         split mixed integration test case
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-893">SCB-893</a>] -         measure vertx by vertx metrics mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-906">SCB-906</a>] -         add sample for invocation apm by java agent
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-919">SCB-919</a>] -         generate lambda Getter/Setter from reflect method or field to improve performance
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-920">SCB-920</a>] -         Remove duplicate dependencies
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-921">SCB-921</a>] -         check if swagger compatible to protobuf and choose transport automatically
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-928">SCB-928</a>] -         support swagger &quot;collection-format&quot; feature
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-944">SCB-944</a>] -         make control IT deploy simpler and print less log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-957">SCB-957</a>] -         delete too old protobuf map compatible flag
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-992">SCB-992</a>] -         Synchronous open source code from Vert.x 3.5.3 version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1023">SCB-1023</a>] -         switch max connection limitation to metrics mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1035">SCB-1035</a>] -         Update third party licenses for java-chassis
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.0.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-651">SCB-651</a>] -         QPS rate limit bug
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-662">SCB-662</a>] -         Using cse/servicecomb duplicate key will get list of values
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-666">SCB-666</a>] -         Test failure on system that have rotate option set in /etc/resolv.conf
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-696">SCB-696</a>] -         [AccessLog] If nginx send requests via short-lived connections, %v will print &quot;0.0.0.0&quot;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-699">SCB-699</a>] -         add schemaIds field in register.yaml when mock the Local sevice-center
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-703">SCB-703</a>] -         When consumer invoke void type method in RPC style, an exception is thrown
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-705">SCB-705</a>] -         When consumer invoke an unregistered provider, it will never find this provider even the provider is registered later
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-753">SCB-753</a>] -         NPE when query not exists service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-754">SCB-754</a>] -         Check null invocation in AbstractRestInvocation to avoid unexpected NPE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-759">SCB-759</a>] -         Fix ServiceComb version error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-772">SCB-772</a>] -         Java Chassis::Handlers::Loadbalance test failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-773">SCB-773</a>] -         Java Chassis::Core test failed
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-616">SCB-616</a>] -         Make access log mechanism extensible
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-640">SCB-640</a>] -         Add black/white list support based on public key handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-679">SCB-679</a>] -         Support Cross-Origin Resource Sharing (CORS)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-708">SCB-708</a>] -         Support assembling query param into Object parameter(in Spring MVC developing style)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-752">SCB-752</a>] -         User can switch off outputting merged log4j property file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-760">SCB-760</a>] -         provide a way to invoke service with full path
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-194">SCB-194</a>] -         Improve component-scan setting
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-661">SCB-661</a>] -         Logs improvement to give better information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-671">SCB-671</a>] -         Duplicate cse.xxx to servicecomb.xxx to work better in future
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-684">SCB-684</a>] -         Following swagger conventions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-685">SCB-685</a>] -         Service comb chassis must support default values
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-697">SCB-697</a>] -         Service comb chassis must support JAX-RS @DefaultValue
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-700">SCB-700</a>] -         Check server status when choose an available server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-701">SCB-701</a>] -         RequestBody(required = false) and when requestBody is null then exception observed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-702">SCB-702</a>] -         Deleted unwanted json-lib maven dependency for foundation-config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-706">SCB-706</a>] -         refactor loadbalance filters logic to support invocation based filter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-712">SCB-712</a>] -         Do not register service path to service center when not necessary
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-713">SCB-713</a>] -         @DefaulValue should be set only when input param is null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-715">SCB-715</a>] -         Working in thread that do not have context class loader
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-727">SCB-727</a>] -         Java Chassis-Local generated schema and service center schema are different while registering the service then print the difference content
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-750">SCB-750</a>] -         Dependency management is incomplete in Saga and Java-Chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-755">SCB-755</a>] -         [SCB-755] 755 Duplicate copy cse config to Servicecomb config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-763">SCB-763</a>] -         Simplify Dynamic Config (Apollo) Integration Test in Java Chassis
+</li>
+</ul>
+
+<h2>        Wish
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-746">SCB-746</a>] -         Update Chassis from m1 to m2 in start.servicecomb.io
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-506">SCB-506</a>] -         Report the service governance event 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-693">SCB-693</a>] -         registry microservice failed if get host address failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-725">SCB-725</a>] -         support get main class package when run with &quot;java -jar xxx.jar&quot;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-726">SCB-726</a>] -         edge support convert from form-data or x-www-form-urlencoded to json automatically
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-728">SCB-728</a>] -         add decrypt/signature/... to edge demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-729">SCB-729</a>] -         check if instance cache equals to SC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-733">SCB-733</a>] -         open handlerContext for business logic, and add a new name: localContext
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-738">SCB-738</a>] -         delete microservice from MicroserviceManager after it not exist in SC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-762">SCB-762</a>] -         resolve eclipse compile warnings
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version java-chassis-1.0.0-m2
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-137">SCB-137</a>] -         Add new dimension of transport way for all Consumer/Producer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-196">SCB-196</a>] -         Add metrics for each consumer/provider handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-203">SCB-203</a>] -         servlet rest support file upload
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-252">SCB-252</a>] -         Metrics support overwatch Integration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-370">SCB-370</a>] -         Metrics timer (like latency) output precision must to nano level not milli level
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-383">SCB-383</a>] -         metrics subscribe invocation life event and do statistics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-384">SCB-384</a>] -         provide invocation performance log publisher
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-385">SCB-385</a>] -         metrics publisher switch to new mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-422">SCB-422</a>] -         add executor metrics, not just queue size
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-440">SCB-440</a>] -         Provide Maven Archetype of business-service-pojo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-441">SCB-441</a>] -         Provide Maven Archetype of business-service-jaxrs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-442">SCB-442</a>] -         Provide Maven Archetype of business-service-springmvc
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-445">SCB-445</a>] -         delete old metrics mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-446">SCB-446</a>] -         metrics-prometheus switch to new mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-450">SCB-450</a>] -         documents for metrics initializer/publisher, and how to extend
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-462">SCB-462</a>] -         cloud eye publisher switch to new mechanism
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-470">SCB-470</a>] -         Provide Maven Archetype of business-service-spring-boot-starter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-484">SCB-484</a>] -         servlet rest support download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-485">SCB-485</a>] -         jaxrs mode support file download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-486">SCB-486</a>] -         edge support route file download invocation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-487">SCB-487</a>] -         consumer support download file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-494">SCB-494</a>] -         support delete temp file after download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-501">SCB-501</a>] -         document for download
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-527">SCB-527</a>] -         Reorganization All Archetype For Enable Auto Publish
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-529">SCB-529</a>] -         producer download file from byte[]
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-531">SCB-531</a>] -         x-java-interface change from require to optional
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-532">SCB-532</a>] -         support recursive dependence
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-533">SCB-533</a>] -         javassistUtils create class from CtClass, not only JavaType
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-534">SCB-534</a>] -         generic class generate optimize
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-538">SCB-538</a>] -         create SwaggerToClassGenerator to convert swagger to class
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-540">SCB-540</a>] -         Delete archetypes from java-chassis-dependencies
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-72">SCB-72</a>] -         Can isolation information of provider and consumer been discovered through capability of release and subscription?
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-449">SCB-449</a>] -         Typo in LICENSE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-455">SCB-455</a>] -         Base on 1.0.0-m2-SNAPSHOT version, execution of the metrics UT failed 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-474">SCB-474</a>] -         使用zuul做网关进行路由，当同一个微服务接口同时开放rest和highway方式时，出现无法调用情况。
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-481">SCB-481</a>] -         Fix qps handler assertion errors when schemaid or microservice name contails . (dot)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-490">SCB-490</a>] -         Service Center verrsion is not forward compatible and needs to be noted in releasenote.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-495">SCB-495</a>] -         Compile java-chassis 1.0.0-m2-SNAPSHOT failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-502">SCB-502</a>] -         logs日志没有输出
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-503">SCB-503</a>] -         When using WeighedResponseTimeRule, there are some initialize and stateless access problems
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-507">SCB-507</a>] -         poll task in MetricsBootstrap did not really measure meters
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-512">SCB-512</a>] -         download support chinese file name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-516">SCB-516</a>] -         AccessLog of EdgeService does not print traceId
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-520">SCB-520</a>] -         resolve service with env re-registered will fail
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-521">SCB-521</a>] -         change the priority of ServiceComb config and SpringBoot config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-562">SCB-562</a>] -         Java Chassis will throw NPE when producer impl do not contain any method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-567">SCB-567</a>] -         treat warning as errors, modify the compilerArgments
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-579">SCB-579</a>] -         NullPointerException is thrown when consumer upload null
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-580">SCB-580</a>] -         When upload file size exceeds limitation of provider, consumer will return a confusing response
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-587">SCB-587</a>] -         Fix archetypes readme
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-588">SCB-588</a>] -         Set archetypes sourceEncoding to UTF-8
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-591">SCB-591</a>] -         configcenter need to do encode
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-593">SCB-593</a>] -         Change log level to remind user to specify loadbalance handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-597">SCB-597</a>] -         update spring boot version from 1.4.5 to 1.5.12 in starter archetype
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-617">SCB-617</a>] -         graceful shutdown with standalone tomcat
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-652">SCB-652</a>] -         Fix schema registry environment configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-653">SCB-653</a>] -         When provider returns Transfer-Encoding header and Edge will cause problem
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-654">SCB-654</a>] -         DiscoveryTree has concurrency problems.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-656">SCB-656</a>] -         When provider returns non 200 code Edge Service will all convert to 502
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-658">SCB-658</a>] -         leak of MicroserviceVersions register to EventBus
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-659">SCB-659</a>] -         Fix build failed in Springmvc Integration Test
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-667">SCB-667</a>] -         gracefully shutdown is not work in some case
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-6">SCB-6</a>] -         ServiceComb Java Chassis Metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-136">SCB-136</a>] -         Improvement and New Features of Java Chassis Metrics in version 1.0.0-m2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-201">SCB-201</a>] -         As a SDK user, I want to send file/stream data so that I can use ServiceComb to handle the music or image data
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-257">SCB-257</a>] -         As a developer, I want to download file from microservice
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-292">SCB-292</a>] -         As a developer, I want to use annotation to validate input parameter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-406">SCB-406</a>] -         Chassis must support standard parameter validation handler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-439">SCB-439</a>] -         Provide Maven Archetypes in Java Chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-482">SCB-482</a>] -         Http2 support for java chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-582">SCB-582</a>] -         Provide a way to protection for instance removal
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-607">SCB-607</a>] -         Support printing invocation context in access log
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-611">SCB-611</a>] -         Provide a default Edge service dispatcher to make developer edge easy
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-350">SCB-350</a>] -         Vertx ssl file config error execption approvement
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-355">SCB-355</a>] -         As a operator, when sdk config a fault ak/sk on HuaweiCloud, then will auth token fail, but it continues to register, will cause may fault in server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-373">SCB-373</a>] -         As a developer, i want to do something around serialize/deserialize, so that we should make a  aspect to eanable others can do this work
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-431">SCB-431</a>] -         Add Rat check on the travis CI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-444">SCB-444</a>] -         try to optimize autodiscovery function
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-447">SCB-447</a>] -         optimize SPIServiceUtils to avoid get different instance for the same type
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-467">SCB-467</a>] -         Contributing &amp; Reporting Issues in java-chassis README.md is not direct to any contents
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-477">SCB-477</a>] -         sdk guava‘s version need to update from 16.0.1 to 19.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-488">SCB-488</a>] -         Retry/Metrics some default behavior cause unnecessary retry and logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-498">SCB-498</a>] -         Configuration Center IP Addresses need to meet general specifications
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-514">SCB-514</a>] -         update pom and code, so that we can treat warnings as errors
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-517">SCB-517</a>] -         service center starter for spring boot/cloud improvement
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-518">SCB-518</a>] -         ServiceCenter ip address need to config default port
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-523">SCB-523</a>] -         maven-remote-resource-plugin execute very slow
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-526">SCB-526</a>] -         When creating dynamic configuration, we need to fetch once for the configuration when startup
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-543">SCB-543</a>] -         optimize registry procedure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-546">SCB-546</a>] -         As a developer, want to reregistry schemas in the dev environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-548">SCB-548</a>] -         Support Gracefully Shutdown
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-570">SCB-570</a>] -         reformat  everything
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-575">SCB-575</a>] -         Publish the Java doc of ServiceComb projects
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-576">SCB-576</a>] -         javassist License file need to be updated
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-585">SCB-585</a>] -         Add ServiceComb-java-chassis reference guide to project
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-625">SCB-625</a>] -         ProduceProcessor use SPI to support extends
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-627">SCB-627</a>] -         Java Chassis- Client Request Timeout support for operation/schema/service level
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-636">SCB-636</a>] -         As a OM staff, i want to use the lb endpoint as the servicecenter/configcenter address config
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-646">SCB-646</a>] -         if local swagger exists, not generate swagger according to class
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-649">SCB-649</a>] -         when port can&#39;t been listened,log warn and show more detail message
+</li>
+</ul>
+
+<h2>        Wish
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-504">SCB-504</a>] -         Upgrade to Spring boot 1.5.12.RELEASE
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-515">SCB-515</a>] -          change all configuration from &#39;cse.xxx&#39; to &#39;servicecomb.xxx&#39;
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-672">SCB-672</a>] -         Edge Service support calls from different ApplicationIds
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-673">SCB-673</a>] -         Edge Service support calls from different ApplicationIds
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-324">SCB-324</a>] -         Chassis must support network failure simulation, so that I can developers can enhance the robustness of the app
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-352">SCB-352</a>] -         Support operation level flow control on provider side
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-354">SCB-354</a>] -         metrics上报的统计数据可能需要支持加上业务自己的维度，方便统计分析，比如APP版本，机型等，业务可以把参数作为invocation参数传递到框架，需要框架支持
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-420">SCB-420</a>] -         Change default HTTP header length restriction to 32K
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-424">SCB-424</a>] -         Get configuration interface to add header: x-environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-443">SCB-443</a>] -         Fix randomly UT failure of TestProviderQpsFlowControlHandler
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-453">SCB-453</a>] -         Read configuration from application.yml/application.properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-456">SCB-456</a>] -         Provider a way to input configuration from a Map, instead of  micreservice.yaml
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-457">SCB-457</a>] -         Verify if gradle can manage the ServiceComb java Chassis jars in a remote or local maven repository
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-471">SCB-471</a>] -         vertx upgrade causes use config center push mode error 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-542">SCB-542</a>] -         Update netty&#39;s version to 4.1.24
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-589">SCB-589</a>] -         allow consumer upgrade before producer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-590">SCB-590</a>] -         Update the validator version to latest(6.0.2)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-595">SCB-595</a>] -         Compatible with old SC versions
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-599">SCB-599</a>] -         Service registry failed when service before Service Center start
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-601">SCB-601</a>] -         ServiceComb integrated to spring boot or tomcat will print too many logs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-637">SCB-637</a>] -         enhance HttpServletRequestEx impl
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-647">SCB-647</a>] -         Update LICENSE/NOTICE for release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Java-Chassis-1.0.0-m1
+</code></pre></div></div>
+
+<h3 id="major-improvements">Major improvements:</h3>
+
+<ul>
+  <li>
+    <p>Java Chassis can now use Apollo as configuration center. Users can now
+change configurations like load balancing policy and those changes will
+come into effect on the fly.
+See <a href="http://servicecomb.incubator.apache.org/users/dynamic-config/">here</a> for more
+details.</p>
+  </li>
+  <li>
+    <p>Metrics was re-factored. We now uses events for collecting invocation data
+instead of Hystrix. This reduces the performance penalty of computing
+metrics.
+Metrics can now be fetched via ‘/metrics’ using HTTP.
+See <a href="http://servicecomb.incubator.apache.org/users/metrics-in-1.0.0-m1/">here</a> for
+more details.</p>
+  </li>
+</ul>
+
+<h3 id="other-noticeable-changes">Other Noticeable Changes:</h3>
+
+<ul>
+  <li>The Java Chassis libraries are now under group “org.apache.servicecomb”.</li>
+  <li>We provide out of the box metrics support now. Prometheus is supported.</li>
+  <li>Configuration center was re-factored and moved out from foundation.
+Support for Apollo was added.</li>
+  <li>Users can now use Object type for calling services.</li>
+  <li>Users can now use Generics for calling services.</li>
+  <li>Better integration with Spring MVC.</li>
+  <li>Upgraded to zipkin2 internally, Java Chassis can now work with zipkin
+server v1 and v2.</li>
+  <li>We are in the process of supporting reactive programming. Pojo consumer
+and provider now supports CompletableFuture.</li>
+</ul>
+
+<h3 id="for-more-detailed-information-please-checkout-here">For more detailed information please checkout <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342351">here</a></h3>
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+            <a href=/cn/release/kie-downloads/>中文</a>
+          
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+      
+      <div class="back-to-home"><a href="/">Home</a> > ServiceComb Kie Downloads</div>
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+    
+    <meta itemprop="dateModified" content="September 09, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Kie Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Windows</th>
+      <th>Linux</th>
+      <th>Darwin</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Kie 0.1.0 (LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-src.tar.gz">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-src.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/0.1.0/apache-servicecomb-kie-0.1.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+ or
+ pgpk -a KEYS
+ or
+ pgp -ka KEYS
+</code></pre></div></div>
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-kie-********.asc apache-servicecomb-kie-*********
+or
+pgpv apache-servicecomb-kie-********.asc
+or
+pgp apache-servicecomb-kie-********.asc
+</code></pre></div></div>
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-kie/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
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+      
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+    <meta itemprop="headline" content="Release Notes">
+    <meta itemprop="description" content="Release Notes">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
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+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
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+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>   Release Notes - Apache ServiceComb - Version kie-0.1.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1313">SCB-1313</a>] -         Fix the go debug error in goland
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1538">SCB-1538</a>] -         Servicecomb-kie&#39;s dependency licenses are necessary for the binary release. 
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1333">SCB-1333</a>] -         support delete key
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1396">SCB-1396</a>] -         add service name in rest api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1479">SCB-1479</a>] -         kie documentation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1480">SCB-1480</a>] -         support arm64
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1482">SCB-1482</a>] -         support yaml request to put a key value
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1500">SCB-1500</a>] -         decouple mongodb, use mongodb storage as a plugin
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1311">SCB-1311</a>] -         Redesign database to make service faster and more ease of use
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1312">SCB-1312</a>] -         Create CI for servicecomb-kie
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1325">SCB-1325</a>] -         Refactoring the delete function
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1331">SCB-1331</a>] -         mongodb TLS communication
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1534">SCB-1534</a>] -         Upgrade go chassis, eliminate cross dependency
+</li>
+</ul>
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+    <meta itemprop="headline" content="ServiceComb Mesher Downloads">
+    <meta itemprop="description" content="ServiceComb Mesher Downloads">
+    
+    <meta itemprop="dateModified" content="September 09, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Mesher Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Windows</th>
+      <th>Linux</th>
+      <th>Darwin</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Mesher 1.6.3 (LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-src.tar.gz">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-src.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-windows-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-linux-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-darwin-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/1.6.3/apache-servicecomb-mesher-1.6.3-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-mesher-********.asc apache-servicecomb-mesher-*********
+
+or
+
+pgpv apache-servicecomb-mesher-********.asc
+
+or
+
+pgp apache-servicecomb-mesher-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-mesher/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
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+    
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+
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+      
+        
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+            <h1 class="page__title" itemprop="headline">Release Notes
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+        
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+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version mesher-1.6.3
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1410">SCB-1410</a>] -         mesher config for tracing didn&#39;t work.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1415">SCB-1415</a>] -         mesher relies on go-chassis/go-chassis-plugins.But go-chassis-plugins can not compile because of dependent packages missing 
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1477">SCB-1477</a>] -         add release script to release mesher
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1404">SCB-1404</a>] -         GRPCDefaultDestinationResolver name was miswritten as GPRCDefaultDestinationResolver.
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+    
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+        
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+        
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+          
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+          
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+    <meta itemprop="headline" content="ServiceComb Pack Downloads">
+    <meta itemprop="description" content="ServiceComb Pack Downloads">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Distribution</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Pack 0.5.0(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/0.5.0/apache-servicecomb-pack-distribution-0.5.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Pack 0.4.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.4.0/apache-servicecomb-pack-distribution-0.4.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Pack 0.3.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-pack/0.3.0/apache-servicecomb-pack-distribution-0.3.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-pack********.asc apache-servicecomb-pack-*********
+
+or
+
+pgpv apache-servicecomb-pack-********.asc
+
+or
+
+pgp apache-servicecomb-pack-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-pack/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
+
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content/release/pack-release-notes/index.html

diff --git a/content/release/pack-release-notes/index.html b/content/release/pack-release-notes/index.html
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index 0000000..a10f4c9
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@@ -0,0 +1,1076 @@
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+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
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+          
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+    
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+        
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+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Pack Release Notes">
+    <meta itemprop="description" content="ServiceComb Pack Release Notes">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Pack Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version pack 0.5.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1372">SCB-1372</a>] -         Collection state machine health to metrics
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1374">SCB-1374</a>] -         Implement Alpha Event Channel Plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1379">SCB-1379</a>] -         Add alpha benchmark tool document
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1416">SCB-1416</a>] -         Refactoring the core part of alpha-fsm module  to move to alpha-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1417">SCB-1417</a>] -         Alpha Event Redis Channel Plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1418">SCB-1418</a>] -         Alpha Event Kafka Channel Plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1435">SCB-1435</a>] -         State machine manual
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1439">SCB-1439</a>] -         Optimize class ElasticsearchTransactionRepository persistence parameters
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1442">SCB-1442</a>] -         Topic initialization  &amp; Class KafkaMessagePublisher needs to use globalTxId as the partitioning strategy.
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1264">SCB-1264</a>] -         When setting server.port and alpha.server.port random port is missing the default tag configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1281">SCB-1281</a>] -         saga-frontend access alpha restful API has cross-domain issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1352">SCB-1352</a>] -         Fixed a typo on ParametersContext class in servicecomb-pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1377">SCB-1377</a>] -         The Notice file of ServiceComb-Pack need to updated
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1419">SCB-1419</a>] -         ElasticsearchTransactionRepositoryTest failed for CI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1421">SCB-1421</a>] -         ElasticsearchTransactionRepositoryTest failed for CI 2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1438">SCB-1438</a>] -         Class ElasticsearchTransactionRepository synchronization save method is invalid
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1349">SCB-1349</a>] -         support Nacos Discovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1386">SCB-1386</a>] -         Support to send out SagaEnd event in other method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1411">SCB-1411</a>] -         Add alpha-ui module to provide a simple Web GUI
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-575">SCB-575</a>] -         Publish the Java doc of ServiceComb projects
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1243">SCB-1243</a>] -         Keep the handler name of saga-consumer and saga-producer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1247">SCB-1247</a>] -         Set default value in alpha.cluster.address on omega side
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1272">SCB-1272</a>] -         Improvement Omega timeout processing, interrupt request thread after the timeout
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1279">SCB-1279</a>] -         add omega context verification
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1299">SCB-1299</a>] -         Showing the type,createtime in the Saga UI
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1309">SCB-1309</a>] -         ServicePack CI build should use sprint-boot-2 profile
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1380">SCB-1380</a>] -         Upgrade Java-Chassis version to 1.2.1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1381">SCB-1381</a>] -         Add common api controller to bridge the request of transaction data querying and metrics data querying
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1385">SCB-1385</a>] -         Provide a common way to pass GID and LID
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1387">SCB-1387</a>] -         Upgrade Spring Boot version to 2.1.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1391">SCB-1391</a>] -         Add support for explicit tx context passing for TCC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1395">SCB-1395</a>] -         Switch to openjdk in servicecomb-pack CI build
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1399">SCB-1399</a>] -         Drop the support of Spring Boot 1.x for ServiceComb-Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1432">SCB-1432</a>] -         fix deprecated api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1443">SCB-1443</a>] -         Adding a Rolling File Appender for Log4j2
+</li>
+</ul>
+
+<h2>        Test
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1397">SCB-1397</a>] -         Acceptance test about Byteman error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1403">SCB-1403</a>] -         byteman port configuration conflicts in all acceptance tests.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1423">SCB-1423</a>] -         Non-thread-safe method size of ConcurrentLinkedQueue in AlphaIntegrationTest
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1026">SCB-1026</a>] -         Saga compensation should support to define the retry times
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1238">SCB-1238</a>] -         Introductory article on cluster implementation of ServiceComb Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1241">SCB-1241</a>] -         Update how to use mysql document
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1244">SCB-1244</a>] -         Update the configuration of Pack 0.4.0 in the user guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1298">SCB-1298</a>] -         Add Zookeeper as the Alpha server load balancer
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1314">SCB-1314</a>] -         support zookeeper user_guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1335">SCB-1335</a>] -         Upgrade docker-compose file to 3.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1353">SCB-1353</a>] -         Travis CI should fail fast
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1356">SCB-1356</a>] -         add NACOS to DiscoveryType
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1389">SCB-1389</a>] -         Doc for SCB-1385
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1430">SCB-1430</a>] -         Update the License file of ServiceComb Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1440">SCB-1440</a>] -         Remove the Kamon dependencies
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version pack-0.4.0
+</code></pre></div></div>
+
+<h2> New and Noteworthy </h2>
+<ul>
+   <li> Provides Alpha HA implementation </li>
+   <li> Support to use eureka or consul to do the service discovery of Alpha</li>
+   <li> Fix the event scanner thread exit issue </li>
+  </ul>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1180">SCB-1180</a>] -         Unable to register eureka instance metadata on random gRPC port
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1187">SCB-1187</a>] -         Update distribution LICENSE for Spring Cloud Starter Netflix
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1200">SCB-1200</a>] -         Omega with consul
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1201">SCB-1201</a>] -         alpha-spring-cloud-starter rename alpha-server-cloud-eureka-starter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1204">SCB-1204</a>] -         acceptance tests with consul
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1209">SCB-1209</a>] -         Add a description about the integrated consul
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1118">SCB-1118</a>] -         EventScanner should catch the exception to keep it running.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1159">SCB-1159</a>] -         Rxjs and TypeScript version compatibility issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1216">SCB-1216</a>] -         Alpha Cluster support random gRPC port
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1217">SCB-1217</a>] -         Consul support random gRPC port
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-15">SCB-15</a>] -         service discovery with popular open source service registry
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1155">SCB-1155</a>] -         Generate a random free gRPC port to launch alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1199">SCB-1199</a>] -         service discovery with consul
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1082">SCB-1082</a>] -         Dependency-free-transaction-demo failed on Mac OSX
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1099">SCB-1099</a>] -         Add nexus SNAPSHOT information to the README repo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1100">SCB-1100</a>] -         Updated the user guide for migration from saga 0.2.x
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1103">SCB-1103</a>] -         TCC should have participate started and ended events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1110">SCB-1110</a>] -         omega-transport-feign configure file error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1119">SCB-1119</a>] -         Add the order number on the demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1121">SCB-1121</a>] -         Clean up the OmegaContext once the invocation is over
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1122">SCB-1122</a>] -         Specify the name of RestTemplate in the configuration
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1124">SCB-1124</a>] -         Rename the Handler name of Omega transport
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1125">SCB-1125</a>] -         Add omega instanceid to properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1127">SCB-1127</a>] -         Support alpha server registering to Spring Cloud Eureka
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1128">SCB-1128</a>] -         Omega get Alpha address from Spring Cloud Eureka
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1130">SCB-1130</a>] -         Alpha cluster need distributed lock function
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1158">SCB-1158</a>] -          External jars support Alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1160">SCB-1160</a>] -         SCB-1142 additional
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1171">SCB-1171</a>] -         Improve unit test coverage for ClusterLockServiceTest
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1235">SCB-1235</a>] -         Clean up third party license with maven plugin
+</li>
+</ul>
+
+<h2>        Test
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-306">SCB-306</a>] -         [pack] acceptance tests with all the transaction scenarios
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1152">SCB-1152</a>] -         About abortTimeoutTxStartedEvent test case failed
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1151">SCB-1151</a>] -         Add Eureka instructions in the user guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1161">SCB-1161</a>] -         Eureka integration english guide
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1181">SCB-1181</a>] -         Add mvn wrap script to lock the maven version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1182">SCB-1182</a>] -         Also need to use -Pspring-boot-2 by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1189">SCB-1189</a>] -         Update the Eureka Integration User Guide for version 0.4.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1190">SCB-1190</a>] -         Update the mysql manual for use extension jar description
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1194">SCB-1194</a>] -         Specify alphaEventBus bean with @Qualifier(&quot;alphaEventBus&quot;)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1195">SCB-1195</a>] -         About typo in eureka Integrated documentation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1215">SCB-1215</a>] -         Update document about alpha cluster
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1233">SCB-1233</a>] -         Alpha Server should not include eureka dependencies by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1238">SCB-1238</a>] -         Introductory article on cluster implementation of ServiceComb Pack
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version pack-0.3.0
+</code></pre></div></div>
+<h2> New and Noteworthy </h2>
+<ul>
+   <li> Provides the TCC support </li>
+   <li> Rename the package name from "org.apache.servicecomb.saga" to "org.apache.servicecomb.pack"</li>
+   <li> Omega supports JDK 1.7 </li>
+   <li> Using Spring-Boot 2.1 by default </li>
+</ul>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-817">SCB-817</a>] -         Setup the TCC events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-818">SCB-818</a>] -         Omega support of TCC
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-819">SCB-819</a>] -         Acceptance test of  TCC Demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-820">SCB-820</a>] -         TCC demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-856">SCB-856</a>] -         Implement reaction of the event in Alpha Server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-876">SCB-876</a>] -         Confirm and Cancel invocation support of Omega
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-877">SCB-877</a>] -         Alpha should pesistend the received TCC events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-923">SCB-923</a>] -         Provide API to access the TCC events
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-739">SCB-739</a>] -         It is useless for @SagaStart timeout,and it could not be compensated under @SagaStart
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-741">SCB-741</a>] -         Caused by: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column &#39;payloads&#39; at row 1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-745">SCB-745</a>] -         RetrySender should not throw exception when go the saga start event.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-821">SCB-821</a>] -         Add missing dependencyManagement for omega-transport-feign
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-822">SCB-822</a>] -         Update LICENSE/NOTICE for saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-824">SCB-824</a>] -         Failed to build saga demos
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-826">SCB-826</a>] -         SagaStart abort event should use LocalTransactionID
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-830">SCB-830</a>] -         Update Chassis from 1.0.0-m2 to 1.0.0 in Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-831">SCB-831</a>] -         Saga UT failed at LoadBalancedClusterMessageSenderTest on Windows environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-963">SCB-963</a>] -         Saga transactional method can&#39;t work when compensation happens
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1081">SCB-1081</a>] -         CompositeOmegaCallback&#39;s compensate(TxEvent event) method has concurrency issues
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1098">SCB-1098</a>] -         Pack pom need to be updated
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-665">SCB-665</a>] -         Provide TCC  support
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-730">SCB-730</a>] -         Add Feign transport for supporting Spring Cloud
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-731">SCB-731</a>] -         Add the omega-transport-feign into distribution kit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-732">SCB-732</a>] -         Add the omega-transport-feign into distribution kit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-909">SCB-909</a>] -         Add fault tolerance for service comb TCC
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-244">SCB-244</a>] -         [pack] add demo to use pack with java chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-630">SCB-630</a>] -         Active the -Pdocker profile if detect the docker installation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-639">SCB-639</a>] -         upgrade docker maven plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-660">SCB-660</a>] -         Update the dubbo example compose file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-750">SCB-750</a>] -         Dependency management is incomplete in Saga and Java-Chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-785">SCB-785</a>] -         Cannot get the GlobalTxId and LocalTxId in the compensation method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-805">SCB-805</a>] -         If the node time of alpha and omega are not same, the transaction could be aborted
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-806">SCB-806</a>] -         Polish alpha-server logger
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-813">SCB-813</a>] -         pack-contract-grp module mvn install builds failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-829">SCB-829</a>] -         An index on TxEvent (globalTxId) should be added
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-853">SCB-853</a>] -         Support JDK7 in saga-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-865">SCB-865</a>] -         Refactoring the Omega Interceptors
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-868">SCB-868</a>] -         Added kamon metrics to Alpha Server
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-874">SCB-874</a>] -         saga dubbo demo insert sql and readme optimization
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-875">SCB-875</a>] -         Start the old saga demo with sh script
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-879">SCB-879</a>] -         Pack the aspectj-wave jar into Alpha Server when using perf profile
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-885">SCB-885</a>] -         saga alpha event scanner delete duplicate events sql optimization
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-913">SCB-913</a>] -         Switch TCC demo JPA implementation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-916">SCB-916</a>] -         Clean up @order annotation in TransactionAspectConfig
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1013">SCB-1013</a>] -         Support to disable the event scanner Alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1018">SCB-1018</a>] -         Upgrade spring boot  version to 1.5.17 and 2.0.6
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1029">SCB-1029</a>] -         The compensationMethod size is small
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1036">SCB-1036</a>] -         Throw exception when Compensable retries below -1.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1086">SCB-1086</a>] -         Using spring-boot-2 by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1090">SCB-1090</a>] -         Unify the logger output of the Omega transport.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1091">SCB-1091</a>] -         Upgrade the dubbo version to 2.6.4
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1093">SCB-1093</a>] -         Upgrade the Spring Boot version to 2.1.1 Release
+</li>
+</ul>
+
+<h2>        Test
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-823">SCB-823</a>] -         Set up a fully functional test in kubernetes environment
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-648">SCB-648</a>] -         Omega support JDK7
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-766">SCB-766</a>] -         Upgrade Spring Boot version to 2.0.3.Release and 1.5.14.Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-784">SCB-784</a>] -         SagaStart annotated method should abort the saga transaction once the exception is thrown
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-976">SCB-976</a>] -         Create new git repo for ServiceComb Saga-Core module
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1078">SCB-1078</a>] -         Clean up the saga-core modules from saga-pack repo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1097">SCB-1097</a>] -         Clean up the distribution of servicecomb-pack
+</li>
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+          
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+        
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+    
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+        
+          <span class="nav__sub-title">Saga Actuator</span>
+        
+
+        
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+          
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+            <li><a href="/release/saga-actuator-release-notes/" class="">Release Notes</a></li>
+          
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+
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+
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+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
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+
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+
+            <li><a href="/release/saga-release-notes/" class="">Release Notes</a></li>
+          
+            
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+
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+
+            <li><a href="/release/saga-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Saga Actuator Downloads">
+    <meta itemprop="description" content="ServiceComb Saga Actuator Downloads">
+    
+    <meta itemprop="dateModified" content="March 28, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Saga Actuator Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Distribution</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Saga Actuator 0.3.0(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/0.3.0/apache-servicecomb-saga-actuator-distribution-0.3.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-saga********.asc apache-servicecomb-saga-*********
+
+or
+
+pgpv apache-servicecomb-saga-********.asc
+
+or
+
+pgp apache-servicecomb-saga-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga-actuator/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
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+          
+            
+            
+
+            
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+
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+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Saga</span>
+        
+
+        
+        <ul>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/saga-release-notes/" class="">Release Notes</a></li>
+          
+            
+            
+
+            
+            
+
+            <li><a href="/release/saga-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
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+</h1>
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+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Saga-Actuator-0.3.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-866">SCB-866</a>] -         Support to call SQL component in saga-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-867">SCB-867</a>] -         Support to call SQL component in saga-format
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-864">SCB-864</a>] -         Support to call SQL component in saga-core
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-692">SCB-692</a>] -         Restore the centric Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-834">SCB-834</a>] -         Upgrade akka version to 2.5.14
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-852">SCB-852</a>] -         Split the actor work from saga-core
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-855">SCB-855</a>] -         Support JDK7 in saga-format
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-962">SCB-962</a>] -         The forwardPolicy of Saga can configure the maximum of retries
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-783">SCB-783</a>] -         Update the Saga License file with new added modules
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-976">SCB-976</a>] -         Create new git repo for ServiceComb Saga-Core module
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+
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+      
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+            <h1 class="page__title" itemprop="headline">ServiceComb Saga Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <p><strong>Note</strong>: servicecomb-saga is renamed to servicecomb-pack， please go to <a href="https://servicecomb.apache.org/release/pack-downloads/">pack_downloads</a> for new Version downloads.</p>
+
+<h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Distribution</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Saga 0.2.1(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-bin.zip">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-bin.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/0.2.1/apache-servicecomb-saga-distribution-0.2.1-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Saga 0.2.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.2.0/apache-servicecomb-incubating-saga-distribution-0.2.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Saga 0.1.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-bin.zip">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-bin.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-saga/0.1.0/apache-servicecomb-incubating-saga-distribution-0.1.0-bin.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-saga********.asc apache-servicecomb-saga-*********
+
+or
+
+pgpv apache-servicecomb-saga-********.asc
+
+or
+
+pgp apache-servicecomb-saga-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-saga/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
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+            <li><a href="/release/mesher-downloads/" class="">Downloads</a></li>
+          
+        </ul>
+        
+      </li>
+    
+      <li>
+        
+          <span class="nav__sub-title">Pack</span>
+        
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+
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+
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+          
+            
+            
+
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+            
+
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+          
+        </ul>
+        
+      </li>
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="Release Notes">
+    <meta itemprop="description" content="Release Notes">
+    
+    <meta itemprop="dateModified" content="March 28, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version saga-0.2.1
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-741">SCB-741</a>] -         Caused by: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column &#39;payloads&#39; at row 1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-821">SCB-821</a>] -         Add missing dependencyManagement for omega-transport-feign
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-963">SCB-963</a>] -         Saga transactional method can&#39;t work when compensation happens
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-730">SCB-730</a>] -         Add Feign transport for supporting Spring Cloud
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-732">SCB-732</a>] -         Add the omega-transport-feign into distribution kit
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-785">SCB-785</a>] -         Cannot get the GlobalTxId and LocalTxId in the compensation method
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-805">SCB-805</a>] -         If the node time of alpha and omega are not same, the transaction could be aborted
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-806">SCB-806</a>] -         Polish alpha-server logger 
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-784">SCB-784</a>] -         SagaStart annotated method should abort the saga transaction once the exception is thrown
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version saga-0.2.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-426">SCB-426</a>] -         The type of CompensationContext.context field should be thread-safe
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-480">SCB-480</a>] -         [pack] GrpcTxEvent miss the timeout when converting the TxEvent 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-505">SCB-505</a>] -         The service should throw the exception when the saga transaction is timeout
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-566">SCB-566</a>] -         mysql.sql doesn&#39;t have the retried and retryMethod in the TxEvent table
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-584">SCB-584</a>] -         DubboConsumerFilterTest fails on linux
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-615">SCB-615</a>] -         fix typos in EventScanner
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-224">SCB-224</a>] -         [pack] retry sub-transaction on failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-342">SCB-342</a>] -         [pack] secure gRPC transport
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-245">SCB-245</a>] -         [pack] support to intercept dubbo&#39;s requests
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-246">SCB-246</a>] -         [pack] add demo to use pack with dubbo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-410">SCB-410</a>] -         Upgrade to Spring Boot 2.0 in Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-428">SCB-428</a>] -         Add omegaUniquaIdGenerator to the omega id generator
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-429">SCB-429</a>] -         Upgrade Spring Boot version to 1.5.10
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-433">SCB-433</a>] -         Update the maven docker plugin running setting
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-436">SCB-436</a>] -         Clean up the docker-compose file of booking demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-463">SCB-463</a>] -         Upgrade Spring Boot version to 2.0.1.Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-464">SCB-464</a>] -         Upgrade Java Chassis version to 1.0.0-m1
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-465">SCB-465</a>] -         Start the build metrics of Saga in travis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-497">SCB-497</a>] -         Omega test log issue
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-545">SCB-545</a>] -         Update the length of field serviceName from varchar(16) to varchar(36)
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-547">SCB-547</a>] -         EventScaner abort if the findFirstAbortedGlobalTxByType has more than one result
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-568">SCB-568</a>] -         Provide web page for pack Demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-569">SCB-569</a>] -         Add document about SSL setup of Pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-571">SCB-571</a>] -         Decouple OmegaContext in the Application
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-573">SCB-573</a>] -         Split the docker-compose file for debugging easily
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-583">SCB-583</a>] -         Upgrade Spring Boot version to 1.5.13.Release and 2.0.2.Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-628">SCB-628</a>] -         correct the naming of demos
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-632">SCB-632</a>] -         reformat code according to the google code style
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-633">SCB-633</a>] -         Correct artifactId and module of saga-spring-cloud-demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-641">SCB-641</a>] -         Add the dubbo transport plugin into release kit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-642">SCB-642</a>] -         Update the third party dependencies version in the License file
+</li>
+</ul>
+
+<h2>        Wish
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-20">SCB-20</a>] -         JDK9 not supported when unit testing while doc showing JDK8+
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-153">SCB-153</a>] -         Upgrade to Spring Boot 2.0 
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-390">SCB-390</a>] -         [pack] Investigating the Byteman and the Cucumber with running the recovery acceptance tests
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-437">SCB-437</a>] -         [Doc] Provide a FAQ list for Saga project
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-452">SCB-452</a>] -         Write java doc for some class
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-555">SCB-555</a>] -         Add Saga Dubbo demo to show how to manage the transactions with Dubbo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-635">SCB-635</a>] -         Cut Saga-0.2.0 Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-647">SCB-647</a>] -         Update LICENSE/NOTICE for release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version saga-0.1.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-237">SCB-237</a>] -         [pack] acceptance tests of success scenarios
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-278">SCB-278</a>] -         [pack] acceptance test of transaction failure and successful compensation scenario
+</li>
+</ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-130">SCB-130</a>] -         Update the Git PR template
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-323">SCB-323</a>] -         inconsistent port in saga demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-404">SCB-404</a>] -         The base folder name is the same for source and binary release
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-95">SCB-95</a>] -         [pack] able to link sub-transactions as a single global transaction
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-96">SCB-96</a>] -         [pack] intercept sub-transaction commits
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-97">SCB-97</a>] -         [pack] update alpha about transaction state
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-98">SCB-98</a>] -         [pack] send compensate context from alpha to omegas
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-99">SCB-99</a>] -         [pack] compensate on transaction failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-100">SCB-100</a>] -         [pack] async transaction support
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-101">SCB-101</a>] -         [pack] design doc
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-138">SCB-138</a>] -         [pack] omega&#39;s callback about transaction state
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-151">SCB-151</a>] -         [pack] pack usage demo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-152">SCB-152</a>] -         [pack] update alpha on compensation completed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-212">SCB-212</a>] -         [pack] sub-transaction timeout support
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-227">SCB-227</a>] -         [pack] stop sub transaction from running when global tx failed
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-140">SCB-140</a>] -         [pack] do not compensate duplicate transaction events
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-141">SCB-141</a>] -         [pack] support multiple sub transaction in a single service
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-149">SCB-149</a>] -         [pack] service/instance aware omega callback
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-164">SCB-164</a>] -         [pack] alpha connection recovery on crash
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-167">SCB-167</a>] -         [pack] inform alpha about omega id on connection
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-168">SCB-168</a>] -         [pack] resend events on connection loss &amp; load balance
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-169">SCB-169</a>] -         [pack] omega get notified whether events are sent successfully or not
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-173">SCB-173</a>] -         [pack] mark start of saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-174">SCB-174</a>] -         [pack] object serialization/deserialization
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-183">SCB-183</a>] -         [pack] omega callback cleanup on connection loss
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-211">SCB-211</a>] -         [pack] exponential backoff resending event on cluster down or network down
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-213">SCB-213</a>] -         [pack] proper timing to send out SagaEndedEvent on asynchronous compensation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-218">SCB-218</a>] -         [pack] stateless alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-220">SCB-220</a>] -         [pack] duplicate abort event filter to avoid redundant compensation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-228">SCB-228</a>] -         Update to replace the type of TxEvent with Enum
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-232">SCB-232</a>] -         EventType should be same between omega and alpha
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-233">SCB-233</a>] -         Don&#39;t deploy if building with the PR
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-234">SCB-234</a>] -         [pack] fail fast if alpha cluster down
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-238">SCB-238</a>] -         Remove third-party dependencies which violates apache licensing policy
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-239">SCB-239</a>] -         [pack] omega recovery
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-243">SCB-243</a>] -         [pack] support to intercept java chassis
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-270">SCB-270</a>] -         [pack] in order compensation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-305">SCB-305</a>] -         [pack] postIntercept should throw the exception when the timeout happens
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-330">SCB-330</a>] -         [pack] update documents of saga pack
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-395">SCB-395</a>] -         Add How to build into README file
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-400">SCB-400</a>] -         Add guides to run demo without docker compose 
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-104">SCB-104</a>] -         simplify transport rest template implementation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-122">SCB-122</a>] -         Add incubating note to website
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-123">SCB-123</a>] -         Add DISLAIMER to the ServiceComb git repo
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-154">SCB-154</a>] -         Update the package  org.apache.servicecomb
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-157">SCB-157</a>] -         Update the release setting of pom
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-193">SCB-193</a>] -         Generated the Licenses,Notice and DISCLAIMER files when building the artifact
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-231">SCB-231</a>] -         Only publish the snapshot in master branch
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-249">SCB-249</a>] -         [pack] replace hibernate with other ORM tech to avoid license issue
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-260">SCB-260</a>] -         Prepare LICENSE/NOTICE files for releasing
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-344">SCB-344</a>] -         [pack] use mysql as alpha&#39;s backend database
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-346">SCB-346</a>] -         Create the distribution kit for Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-363">SCB-363</a>] -         Remove legacy code from Saga
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-378">SCB-378</a>] -         Add readme for samples so that users can run the samples code by just reading the readme doc
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-380">SCB-380</a>] -         Add incubating to file name the release kit
+</li>
+</ul>
+
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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="ServiceComb Service-Center Downloads">
+    <meta itemprop="description" content="ServiceComb Service-Center Downloads">
+    
+    <meta itemprop="dateModified" content="November 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Service-Center Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+      <th>Windows</th>
+      <th>Linux</th>
+      <th>Darwin</th>
+      <th>Recommended Version of Java-Chassis</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Service-Center 1.3.0 (LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/1.3.0/apache-servicecomb-service-center-1.3.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Service-Center 1.2.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-src.tar.gz">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-src.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.2.0/apache-servicecomb-service-center-1.2.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb Service-Center 1.1.0</td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-src.tar.gz">[src]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-src.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-src.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/servicecomb/servicecomb-service-center/1.1.0/apache-servicecomb-service-center-1.1.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Service-Center 1.0.0</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-darwin-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-darwin-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0/apache-servicecomb-incubating-service-center-1.0.0-darwin-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>Java-Chassis 1.0.0 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Service-Center 1.0.0-m2</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m2/apache-servicecomb-incubating-service-center-1.0.0-m2-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>NA</td>
+      <td>Java-Chassis 1.0.0-m2 or above</td>
+    </tr>
+    <tr>
+      <td>Apache ServiceComb (incubating) Service-Center 1.0.0-m1</td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-src.zip">[src]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-src.zip.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-src.zip.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-windows-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-windows-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-windows-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td><a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-linux-amd64.tar.gz">[Binary]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-linux-amd64.tar.gz.asc">[asc]</a> <a href="https://archive.apache.org/dist/incubator/servicecomb/incubator-servicecomb-service-center/1.0.0-m1/apache-servicecomb-incubating-service-center-1.0.0-m1-linux-amd64.tar.gz.sha512">[sha512]</a></td>
+      <td>NA</td>
+      <td>Java-Chassis 1.0.0-m1 or above</td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-service-center-********.asc apache-servicecomb-service-center-*********
+
+or
+
+pgpv apache-servicecomb-service-center-********.asc
+
+or
+
+pgp apache-servicecomb-service-center-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-service-center/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
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+    <meta itemprop="description" content="Release Notes">
+    
+    <meta itemprop="dateModified" content="April 06, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">Release Notes
+</h1>
+            
+          </header>
+        
+      
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+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.3.0
+</code></pre></div></div>
+
+<h2>        Sub-task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1296">SCB-1296</a>] -         [Syncer] Store Syncer data to etcd
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1295">SCB-1295</a>] -         Syncer for synchronize data between multiple service centers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1301">SCB-1301</a>] -         [Syncer] Syncer reliability improvement, support for etcd cluster management
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1302">SCB-1302</a>] -         [Syncer]Refactor data strcture of storage module to support springcloud Eureka.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1307">SCB-1307</a>] -         Store Syncer data to etcd
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1453">SCB-1453</a>] -         [Syncer] New servicecenter plugin supported eureka
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1427">SCB-1427</a>] -         Move storage to syncer/servicecenter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1429">SCB-1429</a>] -         Use etcd operation
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1441">SCB-1441</a>] -         [Syncer] Support for using tls certificate in Syner
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1464">SCB-1464</a>] -         [Syncer] The architecture picture needs to be updated, after adding support for eureka
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1465">SCB-1465</a>] -         [Syncer] Command line parameter error in Quick Start
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1491">SCB-1491</a>] -         [Syncer] Example of instance access between multiple service-centers
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1498">SCB-1498</a>] -         Allow schema modification of services in production environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1512">SCB-1512</a>] -         Allow custom handler chain
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1539">SCB-1539</a>] -         Add command line to support output syncer version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1540">SCB-1540</a>] -         Add syncer&#39;s packaging command to the script of release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.2.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1050">SCB-1050</a>] -         Metrics cache does not clean
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Unexpected events publish if error occurs in previous list-watch loop
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Re-register instance does not keep alive the lease
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Use the raw password if decrypt failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Should not show the shared microservices by default
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1059">SCB-1059</a>] -         Add grpc keepalive time
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1069">SCB-1069</a>] -         Wrong response of batch delete microservices API
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1049">SCB-1049</a>] -         Alarm center
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1087">SCB-1087</a>] -         Add View Schema Option in Schema Details Page
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1052">SCB-1052</a>] -         import zap logger without binding go version
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1053">SCB-1053</a>] -         Batch microservices instances discovery API
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1070">SCB-1070</a>] -         New instance &#39;TESTING&#39; status
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1092">SCB-1092</a>] -         More abundant metrics information
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1219">SCB-1219</a>] -         Prepare 1.2.0 Release
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version service-center-1.1.0
+</code></pre></div></div>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-744">SCB-744</a>] -         Wrong error code returned in Find API
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-851">SCB-851</a>] -         Can not get providers if consumer have * dependency rule
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-857">SCB-857</a>] -         Provider rule of consumer can not be removed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-863">SCB-863</a>] -         build script for docker image gives an error
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-890">SCB-890</a>] -         Lost changed event when bootstrap with embedded etcd
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-912">SCB-912</a>] -         rest client still verify peer host when verifyPeer flag set false
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-924">SCB-924</a>] -         Etcd cacher should re-list etcd in fixed time interval
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-927">SCB-927</a>] -         The latest Lager is not compatible
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-929">SCB-929</a>] -         Concurrent error in update resource APIs
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-930">SCB-930</a>] -         Service Center Frontend stops responding in Schema test if Schema has &#39;\&quot;&#39; character in the description
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-934">SCB-934</a>] -         Get all dependency rules will panic
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-938">SCB-938</a>] -         Should check self presevation max ttl
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-951">SCB-951</a>] -         Wrong help information in scctl
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-958">SCB-958</a>] -         The instance delete event delay more than 2s
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-977">SCB-977</a>] -         Dependencies will not be updated in 5min when micro service is changed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-980">SCB-980</a>] -         The dependency will be broken when commit etcd failed
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-981">SCB-981</a>] -         Can not remove the microservice and instance properties
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-991">SCB-991</a>] -         Optimize args parsing
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-993">SCB-993</a>] -         Bug fixes
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-994">SCB-994</a>] -         SC can not read the context when client using grpc api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1027">SCB-1027</a>] -         Fix the core dump in SC which compiled with go1.10+
+</li>
+</ul>
+
+<h2>        New Feature
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-815">SCB-815</a>] -         Support deploy in Kubernetes
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-850">SCB-850</a>] -         Support discover instances from kubernetes cluster
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-869">SCB-869</a>] -         SC cli tool
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-902">SCB-902</a>] -         Support service discovery by Service Mesh
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-914">SCB-914</a>] -         Support using scctl to download schemas
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-941">SCB-941</a>] -         Support multiple datacenter deployment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-949">SCB-949</a>] -         Support access distinct kubernetes clusters
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-418">SCB-418</a>] -         How to deploy a SC cluster in container environment
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-435">SCB-435</a>] -         Add plugin document in ServiceCenter
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-792">SCB-792</a>] -         More abundant metrics information
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-796">SCB-796</a>] -         Update the paas-lager package
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-797">SCB-797</a>] -         More information in dump API
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-807">SCB-807</a>] -         Limit the topology view to only 100 microservices.
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-808">SCB-808</a>] -         Aut-refresh the dashboard and service-list page every 10sec
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-809">SCB-809</a>] -         Verify the chinese version of the UI as all chinese text was translated using Google Translate
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-816">SCB-816</a>] -         Update the protobuf version to 1.0.0
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-840">SCB-840</a>] -         Support configable limit in buildin quota plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-844">SCB-844</a>] -         Update golang version to 1.9.2
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-848">SCB-848</a>] -         Uses zap to replace the paas-lager
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-862">SCB-862</a>] -         Using different environment variables in image
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-892">SCB-892</a>] -         output plugins configs in version api
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-899">SCB-899</a>] -         Support go1.11 module maintaining
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-901">SCB-901</a>] -         Making service registration api idempotent
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-937">SCB-937</a>] -         Customizable tracing sample rate
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-953">SCB-953</a>] -         Support sync distinct Kubernetes service types to service-center
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-978">SCB-978</a>] -         Fix translation issues for Chinese Locale on First Load
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-983">SCB-983</a>] -         Output the QPS per domain
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-984">SCB-984</a>] -         Add Health Check command
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1015">SCB-1015</a>] -         Support the forth microservice version number registration
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-720">SCB-720</a>] -         Show the instance statistics in Dashboard and Instance List in Side Menu
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-973">SCB-973</a>] -         TLP graduation tasks
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1016">SCB-1016</a>] -         Change git repo name
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1028">SCB-1028</a>] -         Prepare 1.1.0 Service-Center Release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1033">SCB-1033</a>] -         Update license for Service-Center
+</li>
+</ul>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0
+</code></pre></div></div>
+
+<h4 id="new-featuresimprovements">New Features/Improvements:</h4>
+<ul>
+  <li>Make ETCD connection more Resilient</li>
+  <li>Make ETCD request timeout configurable</li>
+  <li>Support TLS Plugin</li>
+  <li>Optimize Governance API for Searching Schema</li>
+  <li>Optimize Find Instance API</li>
+  <li>Use glide for dependency management</li>
+  <li>Add release binaries for MacOS</li>
+  <li>Add Toplogy View and Instance View in UI</li>
+</ul>
+
+<h4 id="bug-fix">Bug-Fix:</h4>
+<ul>
+  <li>Fix connection leak in etcd</li>
+  <li>Fix Lose of events in some scenarios</li>
+  <li>Fix Cache mismatch.</li>
+</ul>
+
+<h6 id="for-more-details-please-click-here">For more details please <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342427">click here</a></h6>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0-m2
+</code></pre></div></div>
+
+<h4 id="api-changes-">API Changes :</h4>
+<ul>
+  <li>Governance API also returns self microservice information.</li>
+  <li>Governance API should not show the shared microservices information.</li>
+  <li>Support batch delete in registry.</li>
+  <li>Change the type of force query parameter to bool in delete api.</li>
+</ul>
+
+<h4 id="new-featuresimprovements-1">New Features/Improvements:</h4>
+<ul>
+  <li>Support Async Rest Template.</li>
+  <li>Support of Testing Schema from frontend.</li>
+  <li>Support log rotation.</li>
+  <li>Support ipv6.</li>
+  <li>Static data return instanceCount by domain.</li>
+  <li>Convenient store extension.</li>
+  <li>Retry the connection to etcd in-case of failure.</li>
+  <li>Show proper error details in frontend.</li>
+  <li>Support Default TLS Cipher Suites.</li>
+  <li>Proxy Frontend request to Service-Center.</li>
+  <li>Use bower to resolve the dependency of frontend.</li>
+  <li>Add registry server HC mechanism.</li>
+</ul>
+
+<h4 id="bug-fix-1">Bug-Fix:</h4>
+<ul>
+  <li>Fix issue of filter instance using service-tags.</li>
+  <li>Fix re-creation of tracing file.</li>
+  <li>Fix SC cannot check duplicate endpoints when registered with etcd.</li>
+  <li>Fix wrong parentId in tracing data.</li>
+  <li>Fix wrong log print in update Instance.</li>
+  <li>Fix null pointer reference in zipkin plugin.</li>
+  <li>Fix delete service should delete dependency key.</li>
+  <li>Fix cache does not match with etcd store.</li>
+  <li>Fix remove the backup log files which are expired.</li>
+  <li>Fix typos in response of schema api’s.</li>
+  <li>Fix incorrect metric label value.</li>
+  <li>Fix register instance withe same id will create redundant endpoints.</li>
+</ul>
+
+<h6 id="for-more-details-please-click-here-1">For more details please <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12321626&amp;version=12342354">click here</a></h6>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version Service-Center-1.0.0-m1
+</code></pre></div></div>
+
+<h4 id="api-changes--1">API Changes :</h4>
+<ul>
+  <li>Added new API to get All Schema List.</li>
+  <li>Add Service statistics in the Governance API.</li>
+  <li>Add Self-microservice information in the Governance API.</li>
+</ul>
+
+<h4 id="new-featuresimprovements-2">New Features/Improvements:</h4>
+<ul>
+  <li>Support discovery of SC instances by Consumer micro-service.</li>
+  <li>Event driven implementation for dependency rules.</li>
+  <li>Make compact interval configurable and avoid defragmentation of the database when compacted.</li>
+  <li>Update the default quota’s limit of service/instance count.</li>
+  <li>Update black-list rule controls in discovery.</li>
+</ul>
+
+<h4 id="metrics-">Metrics :</h4>
+<ul>
+  <li>Added support for Prometheus metrics exposure.</li>
+  <li>Added templates for Grafana Dashboard.</li>
+</ul>
+
+<h4 id="optimization">Optimization:</h4>
+<ul>
+  <li>Optimized Restful clients and plugins loader.</li>
+  <li>Optimized Service-Count calculation rule.</li>
+  <li>Use CDN for resolving all the dependencies of frontend.</li>
+</ul>
+
+<h4 id="bug-fix-2">Bug-Fix:</h4>
+<ul>
+  <li>Fix panic issue while deleting instance and invalid metrics request.</li>
+  <li>Fix modify schema response issue and heart-beat failure when etcd has no leader.</li>
+  <li>Fix batch delete api to exempt from unregistering service-center microservice.</li>
+  <li>Fix watcher wrong event sequence when SC modify resource concurrently</li>
+  <li>Fix discovery of default APP services in Shared service mode</li>
+</ul>
+
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+          
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+    
+    <meta itemprop="dateModified" content="September 02, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Toolkit Downloads
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h2 id="releases">Releases</h2>
+
+<table>
+  <thead>
+    <tr>
+      <th>Release</th>
+      <th>Source</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Apache ServiceComb Toolkit 0.1.0(LATEST)</strong></td>
+      <td><a href="https://apache.org/dyn/closer.cgi/servicecomb/servicecomb-toolkit/0.1.0/apache-servicecomb-toolkit-distribution-0.1.0-src.zip">[src]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/0.1.0/apache-servicecomb-toolkit-distribution-0.1.0-src.zip.asc">[asc]</a> <a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/0.1.0/apache-servicecomb-toolkit-distribution-0.1.0-src.zip.sha512">[sha512]</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<p><strong>Verifying the release</strong></p>
+
+<p>It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures.
+ The PGP signatures can  be verified using GPG or PGP.
+ Please download the <a href="https://www.apache.org/dist/servicecomb/KEYS" target="_blank">KEYS</a> as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/" target="_blank">directory</a> and not from the mirrors.</p>
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code> gpg --import KEYS
+
+ or
+
+ pgpk -a KEYS
+
+ or
+
+ pgp -ka KEYS
+
+</code></pre></div></div>
+
+<p>To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.</p>
+
+<div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>gpg --verify apache-servicecomb-toolkit********.asc apache-servicecomb-toolkit-*********
+
+or
+
+pgpv apache-servicecomb-toolkit-********.asc
+
+or
+
+pgp apache-servicecomb-toolkit-********.asc
+
+
+</code></pre></div></div>
+
+<p>Alternatively you can download the SHA signatures from main distribution <a href="https://www.apache.org/dist/servicecomb/servicecomb-toolkit/" target="_blank">repo</a> and verify the downloads using sha512sum.</p>
+
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+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_release/toolkit_downloads.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
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content/release/toolkit-release-notes/index.html

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+    <meta itemprop="headline" content="ServiceComb Toolkit Release Notes">
+    <meta itemprop="description" content="ServiceComb Toolkit Release Notes">
+    
+    <meta itemprop="dateModified" content="September 02, 2019">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">ServiceComb Toolkit Release Notes
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <div class="highlighter-rouge"><div class="highlight"><pre class="highlight"><code>    Release Notes - Apache ServiceComb - Version toolkit-0.1.0
+</code></pre></div></div>
+
+<h2> New and Noteworthy </h2>
+<ul>
+    <li> Extract the microservice project, OpenAPI contract file and document from the code</li>
+    <li> Generate the microservice project and document from contract</li>
+    <li> Contract verify </li>
+  </ul>
+
+<h2>        Bug
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1358">SCB-1358</a>] -         the issue of invalid naming of generated contract files
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1359">SCB-1359</a>] -         the issue of generating document failure
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1360">SCB-1360</a>] -         the issue of verifying contract file is not correct
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1361">SCB-1361</a>] -         optimize toolkit user experience 
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1412">SCB-1412</a>] -         some redudent folder generated after running test
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1456">SCB-1456</a>] -         Fix the plugin bug that throws some exception when specifying configuration property contractLocation as a file
+</li>
+</ul>
+
+<h2>        Improvement
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1383">SCB-1383</a>] -         support toolkit maven plugin commands that generating code
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1384">SCB-1384</a>] -         refact the code to optimize user experience
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1428">SCB-1428</a>] -         Improve toolkit-maven-plugin test to make it running is not dependent by maven plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1444">SCB-1444</a>] -         support to generate mutiple modules in the same project
+</li>
+</ul>
+
+<h2>        Task
+</h2>
+<ul>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1315">SCB-1315</a>] -         IP clearance for ServiceComb Toolkit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1329">SCB-1329</a>] -         Cleanup unclear license dependencies
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1334">SCB-1334</a>] -         Enable the Travis CI of the servicecomb-toolkit
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1351">SCB-1351</a>] -         Some issues about using toolkit plugin
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1363">SCB-1363</a>] -         update licenses and notice
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1400">SCB-1400</a>] -         Complement and improve unit test
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1422">SCB-1422</a>] -         optimize classmaker
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1426">SCB-1426</a>] -         Support for configuring the toolkit maven plugin in the parent pom
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1433">SCB-1433</a>] -         Remove unit test for constant
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1436">SCB-1436</a>] -         Model is not generated, but the related package is imported
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1447">SCB-1447</a>] -         Add samples
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1452">SCB-1452</a>] -         update README
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1454">SCB-1454</a>] -         The modules tag is not generated in the pom file when using cli
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1455">SCB-1455</a>] -         Adjust the directory where the document is generated
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1458">SCB-1458</a>] -         add settings for distribution
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1459">SCB-1459</a>] -         Add information about the release
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1460">SCB-1460</a>] -         Skip the deployment of samples and it
+</li>
+<li>[<a href="https://issues.apache.org/jira/browse/SCB-1463">SCB-1463</a>] -         Optimize samples readme
+</li>
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+
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diff --git a/content/robots.txt b/content/robots.txt
new file mode 100644
index 0000000..e087884
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content/script/bootstrap

diff --git a/content/script/bootstrap b/content/script/bootstrap
new file mode 100755
index 0000000..7fec0b3
--- /dev/null
+++ b/content/script/bootstrap
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+#nstall Ruby and Gem
+
+#Install Jekyll and Bundler
+sudo gem install jekyll bundler
+
+git clone https://github.com/apache/servicecomb-website.git
+
+#Install the gems with bundle
+sudo bundle install
+
+#Run the following command to install GitBook
+npm install gitbook-cli -g

content/script/deploy

diff --git a/content/script/deploy b/content/script/deploy
new file mode 100755
index 0000000..3ec1e26
--- /dev/null
+++ b/content/script/deploy
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+
+git clone https://github.com/apache/servicecomb-docs.git
+
+gitbook build incubator-servicecomb-docs/java-chassis-reference users/servicecomb-java-chassis-doc
+ 
+bundle exec jekyll build --config _config.yml
+
+bundle exec jekyll server --port 4000 --host 

content/script/release

diff --git a/content/script/release b/content/script/release
new file mode 100755
index 0000000..916ae00
--- /dev/null
+++ b/content/script/release
@@ -0,0 +1,7 @@
+#!/bin/sh
+#push a release to branch asf-site
+
+
+bundle update
+
+git push origin asf-site

content/script/start-server

diff --git a/content/script/start-server b/content/script/start-server
new file mode 100755
index 0000000..410d447
--- /dev/null
+++ b/content/script/start-server
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+#Start web browser to access http://localhost:4000
+sudo bundle exec jekyll server

content/security/index.html

diff --git a/content/security/index.html b/content/security/index.html
new file mode 100644
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+  
+
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+  
+
+
+
+
+
+
+
+
+
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+
+
+  <script type="application/ld+json">
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+
+
+<link href="/feed.xml" type="application/atom+xml" rel="alternate" title="Apache ServiceComb Feed">
+
+<!-- http://t.co/dKP3o1e -->
+<meta name="HandheldFriendly" content="True">
+<meta name="MobileOptimized" content="320">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
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+<!-- For all browsers -->
+<link rel="stylesheet" href="/assets/css/main.css?v=1">
+<link rel="stylesheet" href="/assets/vendor/prism/prism.css?v=1">
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+<!--[if lte IE 9]>
+  <style>
+    /* old IE unsupported flexbox fixes */
+    .greedy-nav .site-title {
+      padding-right: 3em;
+    }
+    .greedy-nav button {
+      position: absolute;
+      top: 0;
+      right: 0;
+      height: 100%;
+    }
+  </style>
+<![endif]-->
+
+<meta http-equiv="cleartype" content="on">
+
+    <!-- start custom head snippets -->
+
+<!-- insert favicons. use http://realfavicongenerator.net/ -->
+<link href="https://fonts.cat.net/css?family=Roboto:400,500,700|Source+Code+Pro" rel="stylesheet">
+<script src="/assets/js/custom.js"></script>
+<!-- end custom head snippets -->
+
+  </head>
+
+  <body class="layout--single">
+
+    <!--[if lt IE 9]>
+<div class="notice--danger align-center" style="margin: 0;">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->
+    <div class="masthead" onmouseleave="$('#childrenShow').css('display', 'none')">
+  <div class="masthead__inner-wrap">
+    <div class="masthead__menu">
+      <nav id="site-nav" class="greedy-nav">
+	      
+          <a class="site-title active" href="/"><img src="https://www.apache.org/img/servicecomb.png"></a>
+	      
+        <ul class="visible-links">
+          
+        </ul>
+        <button><div class="navicon"></div></button>
+        <ul class="hidden-links hidden"></ul>
+        <div class="nav-lang">
+          
+            
+            <a href=/cn/security/>中文</a>
+          
+        </div>
+      </nav>
+    </div>
+  </div>
+</div>
+
+
+    
+
+
+
+<div id="main" role="main">
+  
+  <div class="sidebar sticky">
+      
+      <div class="back-to-home"><a href="/">Home</a> > security issues</div>
+      
+  
+  
+    
+      
+      
+      
+    
+    
+      
+
+<nav class="nav__list">
+  
+  <input id="ac-toc" name="accordion-toc" type="checkbox" />
+  <label for="ac-toc">Toggle Menu</label>
+  <ul class="nav__items">
+    
+  </ul>
+</nav>
+
+    
+  
+  </div>
+
+
+
+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+    <meta itemprop="headline" content="security issues">
+    <meta itemprop="description" content="security issues">
+    
+    <meta itemprop="dateModified" content="June 07, 2018">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" itemprop="headline">security issues
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <h1 id="apache-servicecomb-security">Apache ServiceComb Security</h1>
+
+<p>The Apache Software Foundation takes a rigorous standpoint in annihilating the security issues in its software projects. Apache ServiceComb is highly sensitive and forthcoming to issues pertaining to its features and functionality.</p>
+
+<p>If you have apprehensions regarding ServiceComb’s security or you discover vulnerability or potential threat, don’t hesitate to get in touch with the <a href="http://www.apache.org/security/">Apache Security Team</a> by dropping a mail at <a href="mailto:security@apache.org">security@apache.org</a>. In the mail, specify the project name ServiceComb with the description of the issue or potential threat. You are also urged to recommend the way to reproduce and replicate the issue. The security team and the ServiceComb community will get back to you after assessing and analysing the findings.</p>
+
+<p><strong>PLEASE PAY ATTENTION</strong> to report the security issue on the security email before disclosing it on public domain.</p>
+
+        
+      </section>
+
+      <footer class="page__meta">
+        
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+        
+      </footer>
+
+      
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+      
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+    </div>
+
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+  </article>
+
+  
+  
+</div>
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+    <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
+    <div align="center" style="margin: 0 0;">
+    <ins class="adsbygoogle"
+         style="display:block; border-bottom: initial;"
+         data-ad-client="ca-pub-7328585512091257"
+         data-ad-slot="3049671934"
+         data-ad-format="auto"></ins>
+    </div>
+
+    <div class="page__footer">
+      <footer>
+        <!-- start custom footer snippets -->
+
+<!-- end custom footer snippets -->
+
+        <div class="container">
+  <div class="row justify-content-md-center">
+    
+    <div class="col">
+      <ul>
+        <p class="header">Resources</p>
+        <li><a href="/docs/quick-start/">Quick Start</a></li>
+        <li><a href="/users/">User Guide</a></li>
+        <li><a href="/slides/">Workshop Slides</a></li>
+        <li><a href="/users/faq/">Frequently Asked Questions</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">ASF</p>
+        <li><a href="http://www.apache.org">Foundation</a></li>
+        <li><a href="http://www.apache.org/licenses/">License</a></li>
+        <li><a href="http://www.apache.org/events/current-event">Events</a></li>
+        <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+        <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul>
+        <p class="header">Contribute</p>
+        <li><a href="http://issues.apache.org/jira/browse/SCB">Report a Doc Issue</a></li>
+        <li><a href="https://github.com/apache/servicecomb-website/edit/master/_pages/security.md">Edit This Page on Github</a></li>
+        <li><a href="/developers/submit-codes/">Code Submit Guide</a></li>
+        <li><a href="/security">Security</a></li>
+      </ul>
+    </div>
+    <div class="col">
+      <ul class="social-icons">
+        <p class="header">Community</p>
+        <li>
+            <a href="mailto:dev-subscribe@servicecomb.incubator.apache.org" rel="nofollow"><span class="mail">Mailing List</span></a>
+        </li>
+        <li>
+            <a href="https://github.com/apache?q=ServiceComb" target="_blank"><span class="github">Github</span></a>
+        </li>
+        <li>
+            <a href="https://twitter.com/ServiceComb" target="_blank"><span class="twitter">Twitter</span></a>
+        </li>
+        <li>
+            <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a>
+        </li>
+      </ul>
+    </div>
+  </div>
+</div>
+<div class="page__footer-bottom">
+  <div>&copy; 2019 Apache ServiceComb. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.</div>
+  <div>All other marks mentioned may be trademarks or registered trademarks of their respective owners.</div>
+</div>
+
+      </footer>
+    </div>
+
+    <script src="/assets/js/main.min.js"></script>
+
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+  <script>
+  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
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+  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
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+  ga('create', 'UA-101622733-1', 'auto');
+  ga('send', 'pageview');
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+  </body>
+</html>

content/sitemap.xml

diff --git a/content/sitemap.xml b/content/sitemap.xml
new file mode 100644
index 0000000..26e7580
--- /dev/null
+++ b/content/sitemap.xml
@@ -0,0 +1,1264 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+<url>
+<loc>/docs/linuxcon-workshop-demo/</loc>
+<lastmod>2017-06-15T09:38:43+08:00</lastmod>
+</url>
+<url>
+<loc>/cn/docs/linuxcon-workshop-demo/</loc>
+<lastmod>2017-06-15T09:38:43+08:00</lastmod>
+</url>
+<url>
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+      
+        <a href="/docs/servicecomb-accept-newcapec-institute-code-donation/" rel="permalink">Apache ServiceComb Accept Code Donation From NewCapec Institute
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Accept Code Donation From NewCapec Institute
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+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
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+
+
+  2 minute read
+
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+  </article>
+</div>
+
+        
+          
+          
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+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="permalink">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
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+        
+          
+          
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+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Eurek
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-cluster/" rel="permalink">ServiceComb Pack 0.4.0 Cluster : Implementation
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This article describes how to use the ServiceComb Pack 0.4.0 cluster and how it works
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/chuanzhiboke-servicecomb-tutoria-release/" rel="permalink">Apache ServiceComb community joint chuanzhiboke sub-brand Itheima, Boxuegu and Wisdom Gathering release micro-service tutorial
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Chuanzhiboke and Apache ServiceComb course and technical resources co-construction ceremony ended successfully
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+            <h2 id="2018" class="archive__subtitle">2018</h2>
+            
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/osi-microservices/" rel="permalink">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2018-Shanghai/" rel="permalink">Apache ServiceComb (incubating) Meetup -Shanghai 2018.10.12
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/release-note-1-0-0/" rel="permalink">[Milestone] Apache ServiceComb (incubating) Release Version 1.0.0
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) enters new stage
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day-report/" rel="permalink">Apache ServiceComb (incubating) Day Report
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Day Report
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day/" rel="permalink">Microservice Meetup: Detailed Agenda of Apache ServiceComb (incubating) Day
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Real time updated information of Apache ServiceComb (incubating) Day
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/howto-upgrade-topzipkin2/" rel="permalink">Howto Upgrade to Zipkin2
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Changes between v1 and v2 of zipkin and how Java Chassis upgraded to zipkin2
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+            <h2 id="2017" class="archive__subtitle">2017</h2>
+            
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/service-registry-refactor-proposal/" rel="permalink">Proposal for refactoring service registry module in Java Chassis
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Analysis of service registry and propose a new architecture for it
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/service-center-ui/" rel="permalink">Service-Center Management UI Console
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction Service-Center Management Console
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/how-to-reform-a-legacy-system/" rel="permalink">最头疼的遗留系统该如何改造？
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">微服务是否是业界期待已久的企业架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/distributed_saga_3/" rel="permalink">Eventual Data Consistency Solution in ServiceComb - part 3
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">How is distributed saga in ServiceComb comparing with other consistency solutions?
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/distributed_saga_2/" rel="permalink">Eventual Data Consistency Solution in ServiceComb - part 2
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">The design of distributed saga in ServiceComb
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/distributed_saga_1/" rel="permalink">Eventual Data Consistency Solution in ServiceComb - part 1
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">The background of data consistency problem in the scenario of microservice architecture
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/seckill-development-journey-part-III/" rel="permalink">SecKill Develop Journey (III)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">an introduction how build seckill demo project step by step
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/seckill-development-journey-part-II/" rel="permalink">SecKill Develop Journey  (II)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">an introduction how to build seckill demo project step by step
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/seckill-development-journey-part-I/" rel="permalink">SecKill Development Journey (I)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">an introduction of how to build seckill demo project step by step
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/stress-test-on-company-with-jmeter-in-k8s/" rel="permalink">Stress test on Company Demo with Jmeter in Kubernetes Cluster
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how to do stress test on company demo with jmeter in kubernetes cluster
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/autoscale-on-company/" rel="permalink">On-demand Resource Control for Micro-serviced Company by Autoscale
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This article introduces practice of using kubernetes autoscale in the micro-serviced Company demo to achieve on-demand resource control
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/company-on-kubernetes/" rel="permalink">One-click Deployment at Kubernetes
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This blog will introduce how to deploy company based on ServiceComb in the kubernetes cluster, and intercom communication of company
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/communication-btw-sc-ms/" rel="permalink">Communication Between Service-Center and MicroServices
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how service-center and microservices work together
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/tracing-with-servicecomb/" rel="permalink">Distributed Tracing with ServiceComb and Zipkin
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A introduction of how to set up distributed tracing with ServiceComb and Zipkin
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/go-to-cloud/" rel="permalink">单体应用利用ServiceComb实现微服务化和云化之路
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">该文档演示：从已有基于spring boot的单体应用利用ServiceComb实现微服务化和云化之路
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+          
+          
+          
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/linuxcon-workshop-demo/" rel="permalink">Linux Con Workshop Demo
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A step by step guide on how to use ServiceComb to develop a complete project
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+    
+  </article>
+</div>
+
+        
+    </div>
+    <div id="postByTag" class="tab-pane fade">
+        
+        
+        <!--
+# Jekyll Group-By-Array 0.1.0
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+
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+
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+<!-- If not equal to previous then it must be unique as sorted -->
+
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+<!-- Push to group_names -->
+
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+<!-- If not equal to previous then it must be unique as sorted -->
+
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+<!-- If not equal to previous then it must be unique as sorted -->
+
+
+<!-- Push to group_names -->
+
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+<!-- If not equal to previous then it must be unique as sorted -->
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+<!-- If not equal to previous then it must be unique as sorted -->
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+
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+
+
+<!-- group_items -->
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+<!-- Collect if contains -->
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+<!-- Push to group_items -->
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+<!-- Collect if contains -->
+
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+<!-- Push to group_items -->
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+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+<!-- Collect if contains -->
+
+
+
+<!-- Push to group_items -->
+
+
+
+        
+          
+          <h2 id="cluster" class="archive__subtitle">Cluster</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-cluster/" rel="permalink">ServiceComb Pack 0.4.0 Cluster : Implementation
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This article describes how to use the ServiceComb Pack 0.4.0 cluster and how it works
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="consul" class="archive__subtitle">Consul</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="discovery" class="archive__subtitle">Discovery</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Eurek
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="eureka" class="archive__subtitle">Eureka</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Eurek
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="huawei-cloud" class="archive__subtitle">Huawei Cloud</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/go-to-cloud/" rel="permalink">单体应用利用ServiceComb实现微服务化和云化之路
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">该文档演示：从已有基于spring boot的单体应用利用ServiceComb实现微服务化和云化之路
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="meetup" class="archive__subtitle">Meetup</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="permalink">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/osi-microservices/" rel="permalink">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2018-Shanghai/" rel="permalink">Apache ServiceComb (incubating) Meetup -Shanghai 2018.10.12
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day-report/" rel="permalink">Apache ServiceComb (incubating) Day Report
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Day Report
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day/" rel="permalink">Microservice Meetup: Detailed Agenda of Apache ServiceComb (incubating) Day
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Real time updated information of Apache ServiceComb (incubating) Day
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="microservice" class="archive__subtitle">Microservice</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-KubeCon+CloudNative+OSS-Report/" rel="permalink">Apache ServiceComb Meetup - Shanghai 2019.06.24 Report (PDF Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="reform-legacy-system" class="archive__subtitle">Reform legacy system</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/how-to-reform-a-legacy-system/" rel="permalink">最头疼的遗留系统该如何改造？
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">微服务是否是业界期待已久的企业架构解决方案？在对遗留系统进行微服务的改造过程中存在怎样的困难和挑战，应该注意些什么？
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="servicecomb-pack" class="archive__subtitle">ServiceComb Pack</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-eureka/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Eureka
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Eurek
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-consul/" rel="permalink">ServiceComb Pack 0.4.0 Integrated Discovery Service : Consul
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">ServiceComb Pack Integrated Discovery Service Consul
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-pack-cluster/" rel="permalink">ServiceComb Pack 0.4.0 Cluster : Implementation
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This article describes how to use the ServiceComb Pack 0.4.0 cluster and how it works
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="autoscale" class="archive__subtitle">autoscale</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/autoscale-on-company/" rel="permalink">On-demand Resource Control for Micro-serviced Company by Autoscale
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This article introduces practice of using kubernetes autoscale in the micro-serviced Company demo to achieve on-demand resource control
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="course" class="archive__subtitle">course</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/chuanzhiboke-servicecomb-tutoria-release/" rel="permalink">Apache ServiceComb community joint chuanzhiboke sub-brand Itheima, Boxuegu and Wisdom Gathering release micro-service tutorial
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Chuanzhiboke and Apache ServiceComb course and technical resources co-construction ceremony ended successfully
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="demo" class="archive__subtitle">demo</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/linuxcon-workshop-demo/" rel="permalink">Linux Con Workshop Demo
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A step by step guide on how to use ServiceComb to develop a complete project
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="deployment" class="archive__subtitle">deployment</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/company-on-kubernetes/" rel="permalink">One-click Deployment at Kubernetes
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This blog will introduce how to deploy company based on ServiceComb in the kubernetes cluster, and intercom communication of company
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="distributed-tracing" class="archive__subtitle">distributed tracing</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/tracing-with-servicecomb/" rel="permalink">Distributed Tracing with ServiceComb and Zipkin
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A introduction of how to set up distributed tracing with ServiceComb and Zipkin
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="jmeter" class="archive__subtitle">jmeter</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/stress-test-on-company-with-jmeter-in-k8s/" rel="permalink">Stress test on Company Demo with Jmeter in Kubernetes Cluster
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how to do stress test on company demo with jmeter in kubernetes cluster
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="kubernetes" class="archive__subtitle">kubernetes</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/autoscale-on-company/" rel="permalink">On-demand Resource Control for Micro-serviced Company by Autoscale
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This article introduces practice of using kubernetes autoscale in the micro-serviced Company demo to achieve on-demand resource control
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/company-on-kubernetes/" rel="permalink">One-click Deployment at Kubernetes
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">This blog will introduce how to deploy company based on ServiceComb in the kubernetes cluster, and intercom communication of company
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="microservice" class="archive__subtitle">microservice</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/servicecomb-accept-newcapec-institute-code-donation/" rel="permalink">Apache ServiceComb Accept Code Donation From NewCapec Institute
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Accept Code Donation From NewCapec Institute
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2019-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup -Shanghai 2019.09.20 Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/chuanzhiboke-servicecomb-tutoria-release/" rel="permalink">Apache ServiceComb community joint chuanzhiboke sub-brand Itheima, Boxuegu and Wisdom Gathering release micro-service tutorial
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Chuanzhiboke and Apache ServiceComb course and technical resources co-construction ceremony ended successfully
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2018-Shanghai-Report/" rel="permalink">Apache ServiceComb Meetup -Shanghai 2018.10.12 Report (PPT Download)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb Meetup Report (PPT)
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/osi-microservices/" rel="permalink">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">OpenSource India Summit: Hands-on Apache ServiceComb(Incubating) MicroServices Workshop
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/Apache-ServiceComb-Meetup-2018-Shanghai/" rel="permalink">Apache ServiceComb (incubating) Meetup -Shanghai 2018.10.12
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Meetup
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/release-note-1-0-0/" rel="permalink">[Milestone] Apache ServiceComb (incubating) Release Version 1.0.0
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) enters new stage
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day-report/" rel="permalink">Apache ServiceComb (incubating) Day Report
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Day Report
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day/" rel="permalink">Microservice Meetup: Detailed Agenda of Apache ServiceComb (incubating) Day
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Real time updated information of Apache ServiceComb (incubating) Day
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="performance-test" class="archive__subtitle">performance test</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/stress-test-on-company-with-jmeter-in-k8s/" rel="permalink">Stress test on Company Demo with Jmeter in Kubernetes Cluster
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how to do stress test on company demo with jmeter in kubernetes cluster
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  6 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="refactor" class="archive__subtitle">refactor</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/service-registry-refactor-proposal/" rel="permalink">Proposal for refactoring service registry module in Java Chassis
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Analysis of service registry and propose a new architecture for it
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="release" class="archive__subtitle">release</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/release-note-1-0-0/" rel="permalink">[Milestone] Apache ServiceComb (incubating) Release Version 1.0.0
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) enters new stage
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="report" class="archive__subtitle">report</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/apache-servicecomb-incubating-day-report/" rel="permalink">Apache ServiceComb (incubating) Day Report
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) Day Report
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  less than 1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="saga" class="archive__subtitle">saga</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/distributed_saga_3/" rel="permalink">Eventual Data Consistency Solution in ServiceComb - part 3
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">How is distributed saga in ServiceComb comparing with other consistency solutions?
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/distributed_saga_2/" rel="permalink">Eventual Data Consistency Solution in ServiceComb - part 2
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">The design of distributed saga in ServiceComb
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/distributed_saga_1/" rel="permalink">Eventual Data Consistency Solution in ServiceComb - part 1
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">The background of data consistency problem in the scenario of microservice architecture
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  5 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="seckill" class="archive__subtitle">seckill</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/seckill-development-journey-part-III/" rel="permalink">SecKill Develop Journey (III)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">an introduction how build seckill demo project step by step
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/seckill-development-journey-part-II/" rel="permalink">SecKill Develop Journey  (II)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">an introduction how to build seckill demo project step by step
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/seckill-development-journey-part-I/" rel="permalink">SecKill Development Journey (I)
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">an introduction of how to build seckill demo project step by step
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="service-center" class="archive__subtitle">service center</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/service-center-ui/" rel="permalink">Service-Center Management UI Console
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction Service-Center Management Console
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  2 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/communication-btw-sc-ms/" rel="permalink">Communication Between Service-Center and MicroServices
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">An introduction of how service-center and microservices work together
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  1 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="version" class="archive__subtitle">version</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/release-note-1-0-0/" rel="permalink">[Milestone] Apache ServiceComb (incubating) Release Version 1.0.0
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Apache ServiceComb (incubating) enters new stage
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  4 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+          
+          <h2 id="zipkin" class="archive__subtitle">zipkin</h2>
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/howto-upgrade-topzipkin2/" rel="permalink">Howto Upgrade to Zipkin2
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">Changes between v1 and v2 of zipkin and how Java Chassis upgraded to zipkin2
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+            
+
+
+
+<div class="list__item">
+  <article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">
+    
+    <h2 class="archive__item-title" itemprop="headline">
+      
+        <a href="/docs/tracing-with-servicecomb/" rel="permalink">Distributed Tracing with ServiceComb and Zipkin
+</a>
+      
+    </h2>
+    <p class="archive__item-excerpt" itemprop="description">A introduction of how to set up distributed tracing with ServiceComb and Zipkin
+</p>
+    
+      <p class="page__meta"><i class="fa fa-clock-o" aria-hidden="true"></i> 
+
+
+
+
+  3 minute read
+
+</p>
+    
+  </article>
+</div>
+
+          
+        
+    </div>
+</div>
+
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+</div>
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