content/references/java-chassis/zh_CN/featured-topics/upgrading/2_8_0T3_0_0.html - servicecomb-website - Git at Google


 <!doctype html>
 <html lang="en" class="no-js">
   <head>

       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">


       <link rel="icon" href="../../assets/images/favicon.png">
       <meta name="generator" content="mkdocs-1.6.0, mkdocs-material-9.5.19">


         <title>2.8.x 升级 3.0.0 指导 - Java Chassis 3 开发指南</title>


       <link rel="stylesheet" href="../../assets/stylesheets/main.66ac8b77.min.css">


         <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
         <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
         <style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>


     <script>__md_scope=new URL("../..",location),__md_hash=e=>[...e].reduce((e,_)=>(e<<5)-e+_.charCodeAt(0),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>


   </head>


     <body dir="ltr">


     <input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
     <input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
     <label class="md-overlay" for="__drawer"></label>
     <div data-md-component="skip">


         <a href="#28x-300" class="md-skip">
           Skip to content
         </a>

     </div>
     <div data-md-component="announce">

     </div>


 <header class="md-header md-header--shadow" data-md-component="header">
   <nav class="md-header__inner md-grid" aria-label="Header">
     <a href="../../index.html" title="Java Chassis 3 开发指南" class="md-header__button md-logo" aria-label="Java Chassis 3 开发指南" data-md-component="logo">


   <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54Z"/></svg>

     </a>
     <label class="md-header__button md-icon" for="__drawer">

       <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2Z"/></svg>
     </label>
     <div class="md-header__title" data-md-component="header-title">
       <div class="md-header__ellipsis">
         <div class="md-header__topic">
           <span class="md-ellipsis">
             Java Chassis 3 开发指南
           </span>
         </div>
         <div class="md-header__topic" data-md-component="header-topic">
           <span class="md-ellipsis">

               2.8.x 升级 3.0.0 指导

           </span>
         </div>
       </div>
     </div>


       <script>var media,input,key,value,palette=__md_get("__palette");if(palette&&palette.color){"(prefers-color-scheme)"===palette.color.media&&(media=matchMedia("(prefers-color-scheme: light)"),input=document.querySelector(media.matches?"[data-md-color-media='(prefers-color-scheme: light)']":"[data-md-color-media='(prefers-color-scheme: dark)']"),palette.color.media=input.getAttribute("data-md-color-media"),palette.color.scheme=input.getAttribute("data-md-color-scheme"),palette.color.primary=input.getAttribute("data-md-color-primary"),palette.color.accent=input.getAttribute("data-md-color-accent"));for([key,value]of Object.entries(palette.color))document.body.setAttribute("data-md-color-"+key,value)}</script>


       <label class="md-header__button md-icon" for="__search">

         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
       </label>
       <div class="md-search" data-md-component="search" role="dialog">
   <label class="md-search__overlay" for="__search"></label>
   <div class="md-search__inner" role="search">
     <form class="md-search__form" name="search">
       <input type="text" class="md-search__input" name="query" aria-label="Search" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" required>
       <label class="md-search__icon md-icon" for="__search">

         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>

         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
       </label>
       <nav class="md-search__options" aria-label="Search">

         <button type="reset" class="md-search__icon md-icon" title="Clear" aria-label="Clear" tabindex="-1">

           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41Z"/></svg>
         </button>
       </nav>

     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
         <div class="md-search-result" data-md-component="search-result">
           <div class="md-search-result__meta">
             Initializing search
           </div>
           <ol class="md-search-result__list" role="presentation"></ol>
         </div>
       </div>
     </div>
   </div>
 </div>


   </nav>

 </header>

     <div class="md-container" data-md-component="container">


       <main class="md-main" data-md-component="main">
         <div class="md-main__inner md-grid">


               <div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
                 <div class="md-sidebar__scrollwrap">
                   <div class="md-sidebar__inner">


 <nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
   <label class="md-nav__title" for="__drawer">
     <a href="../../index.html" title="Java Chassis 3 开发指南" class="md-nav__button md-logo" aria-label="Java Chassis 3 开发指南" data-md-component="logo">


   <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54Z"/></svg>

     </a>
     Java Chassis 3 开发指南
   </label>

   <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../index.html" class="md-nav__link">


   <span class="md-ellipsis">
     概述
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../start/design.html" class="md-nav__link">


   <span class="md-ellipsis">
     Java Chassis设计参考
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../introduce3.x.x.html" class="md-nav__link">


   <span class="md-ellipsis">
     Java Chassis 3版本介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" >


           <label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0">


   <span class="md-ellipsis">
     快速入门
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_4">
             <span class="md-nav__icon md-icon"></span>
             快速入门
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../start/development-environment.html" class="md-nav__link">


   <span class="md-ellipsis">
     安装本地开发环境
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../start/first-sample.html" class="md-nav__link">


   <span class="md-ellipsis">
     开发第一个微服务应用
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../application-bmi.html" class="md-nav__link">


   <span class="md-ellipsis">
     BMI应用-使用服务治理
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../application-porter.html" class="md-nav__link">


   <span class="md-ellipsis">
     PORTER应用-典型开发场景
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/definition/service-definition.html" class="md-nav__link">


   <span class="md-ellipsis">
     微服务定义
   </span>


       </a>
     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_6" >


           <label class="md-nav__link" for="__nav_6" id="__nav_6_label" tabindex="0">


   <span class="md-ellipsis">
     Spring Boot集成Java Chassis
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_6">
             <span class="md-nav__icon md-icon"></span>
             Spring Boot集成Java Chassis
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../spring-boot/introduction.html" class="md-nav__link">


   <span class="md-ellipsis">
     Spring Boot集成Java Chassis介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../spring-boot/diff-spring-mvc.html" class="md-nav__link">


   <span class="md-ellipsis">
     与Spring Web MVC开发习惯的差异
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_7" >


           <label class="md-nav__link" for="__nav_7" id="__nav_7_label" tabindex="0">


   <span class="md-ellipsis">
     开发服务提供者
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_7_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_7">
             <span class="md-nav__icon md-icon"></span>
             开发服务提供者
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../build-provider/basics.html" class="md-nav__link">


   <span class="md-ellipsis">
     基础概念
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/http-mapping.html" class="md-nav__link">


   <span class="md-ellipsis">
     HTTP参数映射参考
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/jaxrs.html" class="md-nav__link">


   <span class="md-ellipsis">
     用JAX-RS开发微服务
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/springmvc.html" class="md-nav__link">


   <span class="md-ellipsis">
     用SpringMVC开发微服务
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/transparent-rpc.html" class="md-nav__link">


   <span class="md-ellipsis">
     用透明RPC开发微服务
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/use-interface.html" class="md-nav__link">


   <span class="md-ellipsis">
     只发布interface的方法为服务接口
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/reactive.html" class="md-nav__link">


   <span class="md-ellipsis">
     异步处理
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/context-param.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用 Context 参数
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/multi-code.html" class="md-nav__link">


   <span class="md-ellipsis">
     多个返回值和错误码
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/swagger-annotation.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Swagger注解
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/interface-constraints.html" class="md-nav__link">


   <span class="md-ellipsis">
     接口定义和数据类型
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/listen-address-and-publish-address.html" class="md-nav__link">


   <span class="md-ellipsis">
     服务监听地址和发布地址
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/thread-pool.html" class="md-nav__link">


   <span class="md-ellipsis">
     线程池
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/event-listener.html" class="md-nav__link">


   <span class="md-ellipsis">
     服务启动事件
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/parameter-validator.html" class="md-nav__link">


   <span class="md-ellipsis">
     参数效验
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/bootup.html" class="md-nav__link">


   <span class="md-ellipsis">
     程序启动逻辑
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/ipv6-configuration.html" class="md-nav__link">


   <span class="md-ellipsis">
     IPV6配置和使用
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/access-log-configuration.html" class="md-nav__link">


   <span class="md-ellipsis">
     Access Log配置
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_8" >


           <label class="md-nav__link" for="__nav_8" id="__nav_8_label" tabindex="0">


   <span class="md-ellipsis">
     开发服务消费者
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_8_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_8">
             <span class="md-nav__icon md-icon"></span>
             开发服务消费者
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../build-consumer/basics.html" class="md-nav__link">


   <span class="md-ellipsis">
     基础概念
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-consumer/using-resttemplate.html" class="md-nav__link">


   <span class="md-ellipsis">
     Restful风格 - 使用 RestOperations
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-consumer/develop-consumer-using-rpc.html" class="md-nav__link">


   <span class="md-ellipsis">
     RPC风格
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-consumer/invoker.html" class="md-nav__link">


   <span class="md-ellipsis">
     泛化调用
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-consumer/3rd-party-service-invoke.html" class="md-nav__link">


   <span class="md-ellipsis">
     调用第三方REST服务
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_9" >


           <label class="md-nav__link" for="__nav_9" id="__nav_9_label" tabindex="0">


   <span class="md-ellipsis">
     定制请求处理流程
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_9_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_9">
             <span class="md-nav__icon md-icon"></span>
             定制请求处理流程
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../references-handlers/intruduction.html" class="md-nav__link">


   <span class="md-ellipsis">
     处理链介绍
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_10" >


           <label class="md-nav__link" for="__nav_10" id="__nav_10_label" tabindex="0">


   <span class="md-ellipsis">
     通用功能开发
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_10_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_10">
             <span class="md-nav__icon md-icon"></span>
             通用功能开发
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../general-development/metrics.html" class="md-nav__link">


   <span class="md-ellipsis">
     应用性能监控
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/microservice-invocation-chain.html" class="md-nav__link">


   <span class="md-ellipsis">
     微服务调用链
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/customized-tracing.html" class="md-nav__link">


   <span class="md-ellipsis">
     自定义调用链打点
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/local-develop-test.html" class="md-nav__link">


   <span class="md-ellipsis">
     本地开发和测试
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/upload-download.html" class="md-nav__link">


   <span class="md-ellipsis">
     文件上传下载
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/reactive.html" class="md-nav__link">


   <span class="md-ellipsis">
     Reactive
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/dnsconfig.html" class="md-nav__link">


   <span class="md-ellipsis">
     DNS自定义配置
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/proxy.html" class="md-nav__link">


   <span class="md-ellipsis">
     代理设置
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/report-framework-version.html" class="md-nav__link">


   <span class="md-ellipsis">
     框架上报版本号
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/cross-app-invocation.html" class="md-nav__link">


   <span class="md-ellipsis">
     跨应用调用
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/secret-field.html" class="md-nav__link">


   <span class="md-ellipsis">
     定制序列化和反序列化方法
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/context.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Context传递控制消息
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/produceprocess.html" class="md-nav__link">


   <span class="md-ellipsis">
     返回值序列化扩展
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/CORS.html" class="md-nav__link">


   <span class="md-ellipsis">
     跨域资源共享(CORS)
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/AlarmEvent.html" class="md-nav__link">


   <span class="md-ellipsis">
     获取熔断与实例隔离告警事件信息
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/shutdown.html" class="md-nav__link">


   <span class="md-ellipsis">
     优雅停机
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/error-handling.html" class="md-nav__link">


   <span class="md-ellipsis">
     异常处理
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/multienvironment.html" class="md-nav__link">


   <span class="md-ellipsis">
     微服务实例间多环境隔离
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/thread-model.html" class="md-nav__link">


   <span class="md-ellipsis">
     线程模型
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/config-logs.html" class="md-nav__link">


   <span class="md-ellipsis">
     配置日志
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_11" >


           <label class="md-nav__link" for="__nav_11" id="__nav_11_label" tabindex="0">


   <span class="md-ellipsis">
     多样化的通信协议功能
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_11_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_11">
             <span class="md-nav__icon md-icon"></span>
             多样化的通信协议功能
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../transports/introduction.html" class="md-nav__link">


   <span class="md-ellipsis">
     多协议介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/rest-over-vertx.html" class="md-nav__link">


   <span class="md-ellipsis">
     REST over HTTP(Vert.x)
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/http2.html" class="md-nav__link">


   <span class="md-ellipsis">
     REST over HTTP2(Vert.x)
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/rest-over-servlet-embedded.html" class="md-nav__link">


   <span class="md-ellipsis">
     REST over Servlet(Spring Boot Embedded)
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/rest-over-servlet.html" class="md-nav__link">


   <span class="md-ellipsis">
     REST over Servlet(WAR)
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/highway-rpc.html" class="md-nav__link">


   <span class="md-ellipsis">
     Highway
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_12" >


           <label class="md-nav__link" for="__nav_12" id="__nav_12_label" tabindex="0">


   <span class="md-ellipsis">
     多样化的服务注册与发现功能
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_12_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_12">
             <span class="md-nav__icon md-icon"></span>
             多样化的服务注册与发现功能
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../registry/introduction.html" class="md-nav__link">


   <span class="md-ellipsis">
     注册发现介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../registry/service-center.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Service Center
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../registry/nacos.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Nacos
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../registry/zookeeper.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用ZooKeeper
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../registry/local-registry.html" class="md-nav__link">


   <span class="md-ellipsis">
     本地注册发现
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../registry/distributed.html" class="md-nav__link">


   <span class="md-ellipsis">
     去中心化注册发现
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_13" >


           <label class="md-nav__link" for="__nav_13" id="__nav_13_label" tabindex="0">


   <span class="md-ellipsis">
     多样化的配置管理功能
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_13_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_13">
             <span class="md-nav__icon md-icon"></span>
             多样化的配置管理功能
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../config/general-config.html" class="md-nav__link">


   <span class="md-ellipsis">
     服务配置介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/read-config.html" class="md-nav__link">


   <span class="md-ellipsis">
     在程序中读取配置信息
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/kie.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Kie
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/nacos.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Nacos
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/zookeeper.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Zookeeper
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/apollo.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用Apollo
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/cse1.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用CSE1.0配置中心
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_14" >


           <label class="md-nav__link" for="__nav_14" id="__nav_14_label" tabindex="0">


   <span class="md-ellipsis">
     服务治理功能参考
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_14_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_14">
             <span class="md-nav__icon md-icon"></span>
             服务治理功能参考
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../references-handlers/rule-governance.html" class="md-nav__link">


   <span class="md-ellipsis">
     流量特征治理
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/governance-best-practise.html" class="md-nav__link">


   <span class="md-ellipsis">
     流量特征治理最佳实践
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/loadbalance.html" class="md-nav__link">


   <span class="md-ellipsis">
     负载均衡
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/ratelimit.html" class="md-nav__link">


   <span class="md-ellipsis">
     限流
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/router.html" class="md-nav__link">


   <span class="md-ellipsis">
     灰度发布
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/fault-injection.html" class="md-nav__link">


   <span class="md-ellipsis">
     故障注入
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/fail-retry.html" class="md-nav__link">


   <span class="md-ellipsis">
     快速失败和重试
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_15" >


           <label class="md-nav__link" for="__nav_15" id="__nav_15_label" tabindex="0">


   <span class="md-ellipsis">
     网关功能参考
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_15_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_15">
             <span class="md-nav__icon md-icon"></span>
             网关功能参考
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../edge/open-service.html" class="md-nav__link">


   <span class="md-ellipsis">
     介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../edge/by-servicecomb-sdk.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用 Edge Service 做网关
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../edge/zuul.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用 `zuul` 和 `spring cloud gateway` 做网关
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../edge/nginx.html" class="md-nav__link">


   <span class="md-ellipsis">
     nginx 网关简单介绍
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_16" >


           <label class="md-nav__link" for="__nav_16" id="__nav_16_label" tabindex="0">


   <span class="md-ellipsis">
     安全特性参考
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_16_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_16">
             <span class="md-nav__icon md-icon"></span>
             安全特性参考
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../references-handlers/publickey.html" class="md-nav__link">


   <span class="md-ellipsis">
     公钥认证
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../security/tls.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用TLS通信
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../security/shi-yong-rsa-ren-zheng.html" class="md-nav__link">


   <span class="md-ellipsis">
     使用RSA认证
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_17" >


           <label class="md-nav__link" for="__nav_17" id="__nav_17_label" tabindex="0">


   <span class="md-ellipsis">
     专题文章
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_17_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_17">
             <span class="md-nav__icon md-icon"></span>
             专题文章
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../features.html" class="md-nav__link">


   <span class="md-ellipsis">
     特性介绍
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../secrets.html" class="md-nav__link">


   <span class="md-ellipsis">
     技术解密
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../upgrading.html" class="md-nav__link">


   <span class="md-ellipsis">
     升级指导
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../compatibility.html" class="md-nav__link">


   <span class="md-ellipsis">
     兼容问题和兼容性策略
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../performance.html" class="md-nav__link">


   <span class="md-ellipsis">
     性能问题分析和调优
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_18" >


           <label class="md-nav__link" for="__nav_18" id="__nav_18_label" tabindex="0">


   <span class="md-ellipsis">
     常用配置项参考
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_18_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_18">
             <span class="md-nav__icon md-icon"></span>
             常用配置项参考
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../config-reference/rest-transport-client.html" class="md-nav__link">


   <span class="md-ellipsis">
     REST Transport Client 配置项
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_19" >


           <label class="md-nav__link" for="__nav_19" id="__nav_19_label" tabindex="0">


   <span class="md-ellipsis">
     常见问题
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_19_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_19">
             <span class="md-nav__icon md-icon"></span>
             常见问题
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../question-and-answer/faq.html" class="md-nav__link">


   <span class="md-ellipsis">
     FAQ
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../question-and-answer/question_answer.html" class="md-nav__link">


   <span class="md-ellipsis">
     Q & A
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../question-and-answer/interface-compatibility.html" class="md-nav__link">


   <span class="md-ellipsis">
     微服务接口兼容常见问题
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


   </ul>
 </nav>
                   </div>
                 </div>
               </div>


               <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
                 <div class="md-sidebar__scrollwrap">
                   <div class="md-sidebar__inner">


 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">


     <label class="md-nav__title" for="__toc">
       <span class="md-nav__icon md-icon"></span>
       Table of contents
     </label>
     <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>

         <li class="md-nav__item">
   <a href="#_1" class="md-nav__link">
     <span class="md-ellipsis">
       依赖配置和启动类
     </span>
   </a>

     <nav class="md-nav" aria-label="依赖配置和启动类">
       <ul class="md-nav__list">

           <li class="md-nav__item">
   <a href="#java-chassistransport" class="md-nav__link">
     <span class="md-ellipsis">
       Java Chassis原生Transport
     </span>
   </a>

 </li>

           <li class="md-nav__item">
   <a href="#spring-boot-servlet-transport" class="md-nav__link">
     <span class="md-ellipsis">
       Spring Boot Servlet Transport
     </span>
   </a>

 </li>

           <li class="md-nav__item">
   <a href="#web-servlet-transport" class="md-nav__link">
     <span class="md-ellipsis">
       独立WEB容器 Servlet Transport
     </span>
   </a>

 </li>

       </ul>
     </nav>

 </li>

         <li class="md-nav__item">
   <a href="#spi-bean" class="md-nav__link">
     <span class="md-ellipsis">
       SPI 修改为 Bean
     </span>
   </a>

     <nav class="md-nav" aria-label="SPI 修改为 Bean">
       <ul class="md-nav__list">

           <li class="md-nav__item">
   <a href="#bootlistener" class="md-nav__link">
     <span class="md-ellipsis">
       BootListener
     </span>
   </a>

 </li>

           <li class="md-nav__item">
   <a href="#metricsinitializer" class="md-nav__link">
     <span class="md-ellipsis">
       MetricsInitializer
     </span>
   </a>

 </li>

           <li class="md-nav__item">
   <a href="#discoveryfilter" class="md-nav__link">
     <span class="md-ellipsis">
       DiscoveryFilter
     </span>
   </a>

 </li>

       </ul>
     </nav>

 </li>

         <li class="md-nav__item">
   <a href="#cse" class="md-nav__link">
     <span class="md-ellipsis">
       配置项不再支持 cse 前缀
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#_2" class="md-nav__link">
     <span class="md-ellipsis">
       版本管理
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#_3" class="md-nav__link">
     <span class="md-ellipsis">
       契约加载流程变化
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#1x" class="md-nav__link">
     <span class="md-ellipsis">
       1.x 兼容性删除
     </span>
   </a>

     <nav class="md-nav" aria-label="1.x 兼容性删除">
       <ul class="md-nav__list">

           <li class="md-nav__item">
   <a href="#_4" class="md-nav__link">
     <span class="md-ellipsis">
       参数位置匹配
     </span>
   </a>

 </li>

       </ul>
     </nav>

 </li>

         <li class="md-nav__item">
   <a href="#rest-open-api" class="md-nav__link">
     <span class="md-ellipsis">
       REST 和 Open API常见不兼容问题
     </span>
   </a>

     <nav class="md-nav" aria-label="REST 和 Open API常见不兼容问题">
       <ul class="md-nav__list">

           <li class="md-nav__item">
   <a href="#collectionformat" class="md-nav__link">
     <span class="md-ellipsis">
       collectionFormat
     </span>
   </a>

 </li>

       </ul>
     </nav>

 </li>

         <li class="md-nav__item">
   <a href="#springmvc" class="md-nav__link">
     <span class="md-ellipsis">
       SpringMVC 变更项
     </span>
   </a>

     <nav class="md-nav" aria-label="SpringMVC 变更项">
       <ul class="md-nav__list">

           <li class="md-nav__item">
   <a href="#requestattribute-requestparam" class="md-nav__link">
     <span class="md-ellipsis">
       @RequestAttribute 和 @RequestParam 标签
     </span>
   </a>

 </li>

       </ul>
     </nav>

 </li>

         <li class="md-nav__item">
   <a href="#asyncresttemplate" class="md-nav__link">
     <span class="md-ellipsis">
       不在支持 AsyncRestTemplate
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#log4j-logback" class="md-nav__link">
     <span class="md-ellipsis">
       移除 log4j , logback 的封装
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#bizkeeper" class="md-nav__link">
     <span class="md-ellipsis">
       移除 bizkeeper 处理链
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#_5" class="md-nav__link">
     <span class="md-ellipsis">
       移除实例隔离功能
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#archaius" class="md-nav__link">
     <span class="md-ellipsis">
       移除 archaius
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#_6" class="md-nav__link">
     <span class="md-ellipsis">
       多种序列化支持
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#archetypes" class="md-nav__link">
     <span class="md-ellipsis">
       提供新的 archetypes 插件
     </span>
   </a>

 </li>

     </ul>

 </nav>
                   </div>
                 </div>
               </div>


             <div class="md-content" data-md-component="content">
               <article class="md-content__inner md-typeset">


 <h1 id="28x-300">2.8.x 升级 3.0.0 指导</h1>
 <p>3.0.0版本的重要更新：</p>
 <ul>
 <li>最小支持 JDK 17</li>
 <li>采用Spring Boot 3作为开发底座，底层实现依赖Spring Boot 3，不再提供Spring启动方式。</li>
 <li>支持 OpenAPI 3.0 规范</li>
 </ul>
 <p>本文档提供2.8.x升级到3.0.0的指导。</p>
 <blockquote>
 <blockquote>
 <blockquote>
 <p>说明：由于Spring Boot 3不再兼容 javax.servlet， javax.ws 等组件，并且 swagger 1.x 没有提供 jakarta.servlet支持，3.0.0 版本使用 swagger 2.x 支持 Open API 3.0。 因此，3.0.0 版本不能保证与 2.x.x 版本之间的正常通信。 在升级 3.0.0 的时候，需要注意对现有服务进行全量升级，不支持独立升级客户端或者服务端微服务。 </p>
 </blockquote>
 </blockquote>
 </blockquote>
 <h2 id="_1">依赖配置和启动类</h2>
 <h3 id="java-chassistransport">Java Chassis原生Transport</h3>
 <p>Java Chassis原生提供了 Rest Over Vert.x, Highway等原生Transport。Edge Service也使用原生Transport运行。</p>
 <blockquote>
 <blockquote>
 <blockquote>
 <p>TODO</p>
 </blockquote>
 </blockquote>
 </blockquote>
 <h3 id="spring-boot-servlet-transport">Spring Boot Servlet Transport</h3>
 <p>Java Chassis支持运行与Servlet容器，自身作为一个Servlet启动。</p>
 <blockquote>
 <blockquote>
 <blockquote>
 <p>TODO</p>
 </blockquote>
 </blockquote>
 </blockquote>
 <h3 id="web-servlet-transport">独立WEB容器 Servlet Transport</h3>
 <p>Java Chassis支持运行与Servlet容器，自身作为一个Servlet启动。</p>
 <blockquote>
 <blockquote>
 <blockquote>
 <p>TODO</p>
 </blockquote>
 </blockquote>
 </blockquote>
 <h2 id="spi-bean">SPI 修改为 Bean</h2>
 <h3 id="bootlistener">BootListener</h3>
 <h3 id="metricsinitializer">MetricsInitializer</h3>
 <h3 id="discoveryfilter">DiscoveryFilter</h3>
 <h2 id="cse">配置项不再支持 <code>cse</code> 前缀</h2>
 <p>Java Chassis 的所有配置项全部使用 <code>servicecomb</code> 作为前缀，比如：</p>
 <pre><code class="language-yaml">servicecomb:
   service:
     application: my-application
     name: my-service
 </code></pre>
 <p>早期版本，也支持下面的配置：</p>
 <pre><code class="language-yaml">cse:
   service:
     application: my-application
     name: my-service
 </code></pre>
 <p>3.0.0 版本不再提供 <code>cse</code> 前缀支持，需要将 <code>cse</code> 前缀修改为 <code>servicecomb</code>。 </p>
 <h2 id="_2">版本管理</h2>
 <p>3.0.0 简化了注册发现的依赖和实现，以支持更多的注册中心实现。 3.0.0 不再支持版本的管理。具体表现为几个常用的场景：</p>
 <ul>
 <li>客户端指定 version-rule，指明只调用服务端的某些版本；</li>
 <li>客户端根据每个版本的 Open API 定义，能够区分某个 operation 是否存在于一个实例，避免将请求发送到不存在该 operation 的实例。</li>
 <li>Edge Service不再支持版本配置。 即只能配置 /microservice/path， 不能配置 /microservice/version-rule/path。 类似的场景可以采用灰度发布来解决。</li>
 </ul>
 <h2 id="_3">契约加载流程变化</h2>
 <ul>
 <li>
 <p>作为提供者的契约加载</p>
 <p>3.0.0版本提供者不再加载本地契约，而是根据代码生成契约，并将生成的契约注册到注册中心。做这个变化的目的，主要是因为手写契约和代码本身生成契约不一致的情况，会导致代码语义阅读困难，带来很多隐藏不易发现的错误。而语义一致的情况，这种使用方式没有实际意义，使用代码生成契约得到一样的结果。</p>
 </li>
 <li>
 <p>作为消费者的契约加载</p>
 <p>3.0.0版本消费者契约加载流程不变。优先加载本地契约。</p>
 </li>
 </ul>
 <h2 id="1x">1.x 兼容性删除</h2>
 <h3 id="_4">参数位置匹配</h3>
 <p>1.x 和 2.x 版本， Java代码生成契约后，契约的参数个数和顺序可以保持Java代码的Method一致。Java Chassis 2.x 基于契约，默认根据参数名称从契约中查找是否存在该参数。 但是1.x版本，不是基于名称查找的，而是基于参数位置查找的。 所以在部分参数名称不匹配的情况下，2.x做了一些兼容性处理，利用了Open API 2.0可以保证（最大限度，非确定性算法）顺序的机制，可以通过位置匹配到参数。Open API 3.0.0的参数基于名称，并且不在保证和Java的Method参数位置一致，因此3.0.0版本不在支持这个参数位置匹配的查找场景。
 在定义参数的时候，需要保证Java的Method参数名称（或者通过annotation声明的参数名称）与契约的名称一致。（Parameter使用name属性；RequestBody使用扩展属性x-name，如果是form格式，则使用Property的key作为名称。）</p>
 <h2 id="rest-open-api">REST 和 Open API常见不兼容问题</h2>
 <h3 id="collectionformat">collectionFormat</h3>
 <p>collectionFormat 在 2.0 用来表示 Query 参数的形式。 在 3.0 后， 不再支持  tsv 和 jason 格式。 而是指定 style 和 explode。 详细参考： https://swagger.io/docs/specification/serialization/</p>
 <h2 id="springmvc">SpringMVC　变更项</h2>
 <h3 id="requestattribute-requestparam">@RequestAttribute 和 @RequestParam 标签</h3>
 <p>在 servicecomb 的开发指南里面， @RequestAttribute 标签描述为不支持。 但是实际用户使用并不会报错，而且将这个映射为HTTP的form参数。 3.0.0 采用 @RequestAttribute 表示 form 参数， @RequestParam 表示 query参数。</p>
 <p>在使用上需要注意与spring web原生行为的差异。 </p>
 <h2 id="asyncresttemplate">不在支持 AsyncRestTemplate</h2>
 <p>Spring 6 删除了 AsyncRestTemplate 支持， Java Chassis 3.0.0 也删除了支持。 相关代码需要使用 <code>CompletableFuture</code> 异步代码替换。 </p>
 <h2 id="log4j-logback">移除 log4j , logback 的封装</h2>
 <p>Java Chassis 系统内部全部采用 <code>slf4j</code> 记录日志， 不再提供 log4j 的封装功能， 删除了 Log4jUtils 等类。 如果使用了 Log4jUtils 类来初始化日志， 可以参考 <a href="../../general-development/config-logs.html">配置日志</a> 来设置系统日志。 </p>
 <h2 id="bizkeeper">移除 bizkeeper 处理链</h2>
 <p>Java Chassis 早期版本基于 <code>Hystrix</code> 提供了基于方法的服务治理能力，由于社区已经停止 <code>Hystrix</code> 维护，并且 <code>bizkeeper</code> 设计上不能很好的满足场景的故障模式保护， 3.0.0 版本删除了这个模块。 服务治理可以使用流量特征治理来实现，过载保护的最佳处理方案是配置客户端隔离仓。</p>
 <h2 id="_5">移除实例隔离功能</h2>
 <p>Java Chassis 3.0.0 不再支持下面的配置项：</p>
 <pre><code class="language-yaml">servicecomb:
   loadbalance:
     isolation:
       enabled: false
       errorThresholdPercentage: 0
       enableRequestThreshold: 5
       singleTestTime: 60000
       continuousFailureThreshold: 5
       maxSingleTestWindow: 60000 # 为了保证在并发情况下只有一个实例放通，会锁定放通实例。这个时间表示最大锁定时间。
       minIsolationTime: 3000 # 最短隔离时间。并发情况下，实例隔离后进行中的请求可能快速刷新隔离状态，增加最短隔离时间。
       recoverImmediatelyWhenSuccess: true # 放通实例，如果调用成功，立即清除统计状态，保证后续请求能够使用该实例。 2.1.3 新增。
 </code></pre>
 <p>单实例故障防护可以使用流量特征治理来实现，启用客户端熔断和客户端隔离仓。</p>
 <h2 id="archaius">移除 archaius</h2>
 <p>Java Chassis 早期版本基于archaius实现动态配置， 由于这个软件已经停止维护， 3.0.0移除了这个依赖，完成集成和使用 Spring Boot配置机制。 意味着业务
 使用 DynamicPropertyFactory 等 archaius API读取配置的地方，需要使用 Spring Boot 的 Environment API。 Java Chassis仍然保留了 DynamicProperties
 接口， @InjectProperty的配置使用方式， 能够更加方便的使用动态配置。 </p>
 <h2 id="_6">多种序列化支持</h2>
 <p>3.0.0版本支持REST风格多种序列化支持，在application/json基础之上，支持text/plain, application/protobuf支持。 </p>
 <h2 id="archetypes">提供新的 archetypes 插件</h2>
 <blockquote>
 <blockquote>
 <blockquote>
 <p>TODO</p>
 </blockquote>
 </blockquote>
 </blockquote>


               </article>
             </div>


 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>

       </main>

         <footer class="md-footer">

   <div class="md-footer-meta md-typeset">
     <div class="md-footer-meta__inner md-grid">
       <div class="md-copyright">


     Made with
     <a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener">
       Material for MkDocs
     </a>

 </div>

     </div>
   </div>
 </footer>

     </div>
     <div class="md-dialog" data-md-component="dialog">
       <div class="md-dialog__inner md-typeset"></div>
     </div>


     <script id="__config" type="application/json">{"base": "../..", "features": [], "search": "../../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>


       <script src="../../assets/javascripts/bundle.dd8806f2.min.js"></script>


   </body>
 </html>