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| <label for=m-enblog20180814dubbo-basic-usage--dubbo-provider-configuration-check><a href=/en/blog/2018/08/14/dubbo-basic-usage--dubbo-provider-configuration/ title="Dubbo Basic Usage -- Dubbo Provider Configuration" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180814dubbo-basic-usage--dubbo-provider-configuration><span>Dubbo Provider Configuration</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180814manipulating-services-dynamically-via-qos-li><input type=checkbox id=m-enblog20180814manipulating-services-dynamically-via-qos-check> |
| <label for=m-enblog20180814manipulating-services-dynamically-via-qos-check><a href=/en/blog/2018/08/14/manipulating-services-dynamically-via-qos/ title="Manipulating Services Dynamically via QoS" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180814manipulating-services-dynamically-via-qos><span>Dubbo QoS Introduction</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180814source-code-analysis-of-spring-boot-dubbo-app-start-and-stop-li><input type=checkbox id=m-enblog20180814source-code-analysis-of-spring-boot-dubbo-app-start-and-stop-check> |
| <label for=m-enblog20180814source-code-analysis-of-spring-boot-dubbo-app-start-and-stop-check><a href=/en/blog/2018/08/14/source-code-analysis-of-spring-boot-dubbo-app-start-and-stop/ title="Source code analysis of spring-boot+Dubbo App start and stop" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180814source-code-analysis-of-spring-boot-dubbo-app-start-and-stop><span>Dubbo start/stop in spring boot</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180814implementation-of-cross-language-calls-by-dubbo2js-li><input type=checkbox id=m-enblog20180814implementation-of-cross-language-calls-by-dubbo2js-check> |
| <label for=m-enblog20180814implementation-of-cross-language-calls-by-dubbo2js-check><a href=/en/blog/2018/08/14/implementation-of-cross-language-calls-by-dubbo2.js/ title="Implementation of cross-language calls by Dubbo2.js" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180814implementation-of-cross-language-calls-by-dubbo2js><span>dubbo2.js introduction</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180814generic-invoke-of-dubbo-li><input type=checkbox id=m-enblog20180814generic-invoke-of-dubbo-check> |
| <label for=m-enblog20180814generic-invoke-of-dubbo-check><a href=/en/blog/2018/08/14/generic-invoke-of-dubbo/ title="Generic invoke of Dubbo" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180814generic-invoke-of-dubbo><span>Generic invoke</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180814native-image-using-graalvm-li><input type=checkbox id=m-enblog20180814native-image-using-graalvm-check> |
| <label for=m-enblog20180814native-image-using-graalvm-check><a href=/en/blog/2018/08/14/native-image-using-graalvm/ title="Native Image using GraalVM" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180814native-image-using-graalvm><span>Native Image</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180810dubbos-load-balance-li><input type=checkbox id=m-enblog20180810dubbos-load-balance-check> |
| <label for=m-enblog20180810dubbos-load-balance-check><a href=/en/blog/2018/08/10/dubbos-load-balance/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180810dubbos-load-balance><span>Dubbo's Load Balance</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180807use-annotations-in-dubbo-li><input type=checkbox id=m-enblog20180807use-annotations-in-dubbo-check> |
| <label for=m-enblog20180807use-annotations-in-dubbo-check><a href=/en/blog/2018/08/07/use-annotations-in-dubbo/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180807use-annotations-in-dubbo><span>Use Annotations In Dubbo</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180807using-zookeeper-in-dubbo-li><input type=checkbox id=m-enblog20180807using-zookeeper-in-dubbo-check> |
| <label for=m-enblog20180807using-zookeeper-in-dubbo-check><a href=/en/blog/2018/08/07/using-zookeeper-in-dubbo/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180807using-zookeeper-in-dubbo><span>Using Zookeeper in Dubbo</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180807dubbo-101-li><input type=checkbox id=m-enblog20180807dubbo-101-check> |
| <label for=m-enblog20180807dubbo-101-check><a href=/en/blog/2018/08/07/dubbo-101/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180807dubbo-101><span>Your First Dubbo Demo</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180730the-third-dubbo-meetup-has-been-held-in-shenzhen-li><input type=checkbox id=m-enblog20180730the-third-dubbo-meetup-has-been-held-in-shenzhen-check> |
| <label for=m-enblog20180730the-third-dubbo-meetup-has-been-held-in-shenzhen-check><a href=/en/blog/2018/07/30/the-third-dubbo-meetup-has-been-held-in-shenzhen/ title="The third Dubbo meetup has been held in Shenzhen" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180730the-third-dubbo-meetup-has-been-held-in-shenzhen><span>The third Dubbo meetup</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180727sentinel-the-flow-sentinel-of-dubbo-services-li><input type=checkbox id=m-enblog20180727sentinel-the-flow-sentinel-of-dubbo-services-check> |
| <label for=m-enblog20180727sentinel-the-flow-sentinel-of-dubbo-services-check><a href=/en/blog/2018/07/27/sentinel-the-flow-sentinel-of-dubbo-services/ title="Sentinel: The flow sentinel of Dubbo services" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180727sentinel-the-flow-sentinel-of-dubbo-services><span>Introduce sentinel</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180712tracking-with-pinpoint-li><input type=checkbox id=m-enblog20180712tracking-with-pinpoint-check> |
| <label for=m-enblog20180712tracking-with-pinpoint-check><a href=/en/blog/2018/07/12/tracking-with-pinpoint/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180712tracking-with-pinpoint><span>Tracking with Pinpoint</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180701your-first-dubbo-filter-li><input type=checkbox id=m-enblog20180701your-first-dubbo-filter-check> |
| <label for=m-enblog20180701your-first-dubbo-filter-check><a href=/en/blog/2018/07/01/your-first-dubbo-filter/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180701your-first-dubbo-filter><span>Your First Dubbo Filter</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180623the-second-dubbo-shanghai-meetup-has-been-held-successfully-li><input type=checkbox id=m-enblog20180623the-second-dubbo-shanghai-meetup-has-been-held-successfully-check> |
| <label for=m-enblog20180623the-second-dubbo-shanghai-meetup-has-been-held-successfully-check><a href=/en/blog/2018/06/23/the-second-dubbo-shanghai-meetup-has-been-held-successfully/ title="The second Dubbo Shanghai meetup has been held successfully" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180623the-second-dubbo-shanghai-meetup-has-been-held-successfully><span>The second Dubbo meetup</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180512the-first-dubbo-meetup-has-been-held-in-beijing-li><input type=checkbox id=m-enblog20180512the-first-dubbo-meetup-has-been-held-in-beijing-check> |
| <label for=m-enblog20180512the-first-dubbo-meetup-has-been-held-in-beijing-check><a href=/en/blog/2018/05/12/the-first-dubbo-meetup-has-been-held-in-beijing/ title="The first Dubbo meetup has been held in Beijing" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180512the-first-dubbo-meetup-has-been-held-in-beijing><span>The first Dubbo meetup</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180502the-apachecon-na-schedule-has-been-announced-li><input type=checkbox id=m-enblog20180502the-apachecon-na-schedule-has-been-announced-check> |
| <label for=m-enblog20180502the-apachecon-na-schedule-has-been-announced-check><a href=/en/blog/2018/05/02/the-apachecon-na-schedule-has-been-announced/ title="The ApacheCon NA schedule has been announced" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180502the-apachecon-na-schedule-has-been-announced><span>ApacheCon NA</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180425the-gsocgoogle-summer-of-code-2018-li><input type=checkbox id=m-enblog20180425the-gsocgoogle-summer-of-code-2018-check> |
| <label for=m-enblog20180425the-gsocgoogle-summer-of-code-2018-check><a href=/en/blog/2018/04/25/the-gsocgoogle-summer-of-code-2018/ title="The GSoC(Google Summer of Code) 2018" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180425the-gsocgoogle-summer-of-code-2018><span>GSoC 2018</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20180422dubbo-roadmap-is-announced-in-qcon-beijing-2018-li><input type=checkbox id=m-enblog20180422dubbo-roadmap-is-announced-in-qcon-beijing-2018-check> |
| <label for=m-enblog20180422dubbo-roadmap-is-announced-in-qcon-beijing-2018-check><a href=/en/blog/2018/04/22/dubbo-roadmap-is-announced-in-qcon-beijing-2018/ title="Dubbo roadmap is announced in QCon Beijing 2018" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20180422dubbo-roadmap-is-announced-in-qcon-beijing-2018><span>QCon Beijing 2018</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-enblogproposals-li><input type=checkbox id=m-enblogproposals-check> |
| <label for=m-enblogproposals-check><a href=/en/blog/proposals/ title="Proposals About Apache Dubbo" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-enblogproposals><span>Proposals</span></a></label><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog10101application-level-service-discovery-li><input type=checkbox id=m-enblog10101application-level-service-discovery-check> |
| <label for=m-enblog10101application-level-service-discovery-check><a href=/en/blog/1/01/01/application-level-service-discovery/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog10101application-level-service-discovery><span>Application-Level Service Discovery</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog10101enhanced-http-standard-capabilities-of-triple-protocol-li><input type=checkbox id=m-enblog10101enhanced-http-standard-capabilities-of-triple-protocol-check> |
| <label for=m-enblog10101enhanced-http-standard-capabilities-of-triple-protocol-check><a href=/en/blog/1/01/01/enhanced-http-standard-capabilities-of-triple-protocol/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog10101enhanced-http-standard-capabilities-of-triple-protocol><span>Enhanced HTTP Standard Capabilities of Triple Protocol</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-enblogreleases-li><input type=checkbox id=m-enblogreleases-check> |
| <label for=m-enblogreleases-check><a href=/en/blog/releases/ title="New Releases" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-enblogreleases><span>Releases</span></a></label><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog202109202714-release-note-li><input type=checkbox id=m-enblog202109202714-release-note-check> |
| <label for=m-enblog202109202714-release-note-check><a href=/en/blog/2021/09/20/2.7.14-release-note/ title="2.7.14 Release Note" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog202109202714-release-note><span>2.7.14</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog202108233021-release-note-li><input type=checkbox id=m-enblog202108233021-release-note-check> |
| <label for=m-enblog202108233021-release-note-check><a href=/en/blog/2021/08/23/3.0.2.1-release-note/ title="3.0.2.1 Release Note" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog202108233021-release-note><span>3.0.2.1</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20210818302-release-note-li><input type=checkbox id=m-enblog20210818302-release-note-check> |
| <label for=m-enblog20210818302-release-note-check><a href=/en/blog/2021/08/18/3.0.2-release-note/ title="3.0.2 Release Note" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20210818302-release-note><span>3.0.2</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20210702301-release-note-li><input type=checkbox id=m-enblog20210702301-release-note-check> |
| <label for=m-enblog20210702301-release-note-check><a href=/en/blog/2021/07/02/3.0.1-release-note/ title="3.0.1 Release Note" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20210702301-release-note><span>3.0.1</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-enblog20200518past-releases-li><input type=checkbox id=m-enblog20200518past-releases-check> |
| <label for=m-enblog20200518past-releases-check><a href=/en/blog/2020/05/18/past-releases/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-enblog20200518past-releases><span>Past Releases</span></a></label></li></ul></li></ul></li></ul></nav></div></div><main class="col-12 col-md-9 col-xl-8 pl-md-5" role=main><nav aria-label=breadcrumb class=td-breadcrumbs><ol class=breadcrumb><li class=breadcrumb-item><a href=https://cn.dubbo.apache.org/en/blog/>Blog</a></li><li class=breadcrumb-item><a href=https://cn.dubbo.apache.org/en/blog/news/>Articles</a></li><li class="breadcrumb-item active" aria-current=page><a href=https://cn.dubbo.apache.org/en/blog/2019/01/17/how-to-use-seata-to-ensure-consistency-between-dubbo-microservices/ aria-disabled=true class="btn-link disabled">Use Seata in Dubbo</a></li></ol></nav><section id=deprecation-warning><div class="content deprecation-warning pageinfo outdated-blog"><p>This article is more than one year old. Older articles may contain outdated content. Check that the information in the page has not become incorrect since its publication.</p></div></section><div class=td-content><h1>How to use Seata to ensure consistency between Dubbo Microservices</h1><div class=lead>This article will introduce you how to use Seata to ensure consistency between Dubbo Microservices.</div><div class="td-byline mb-4"><time datetime=2019-01-17 class=text-muted>Thursday, January 17, 2019</time></div><header class=article-meta></header><h2 id=use-case>Use case</h2><p>A business logic for user purchasing commodities. The whole business logic is powered by 3 microservices:</p><ul><li>Storage service: deduct storage count on given commodity.</li><li>Order service: create order according to purchase request.</li><li>Account service: debit the balance of user’s account.</li></ul><h3 id=architecture>Architecture</h3><p><img src=/imgs/blog/fescar/fescar-1.png alt=Architecture></p><h3 id=storageservice>StorageService</h3><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span><span style=color:#268bd2>public</span> <span style=color:#268bd2>interface</span> <span style=color:#268bd2>StorageService</span> { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#586e75>/** |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> * deduct storage count |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> */</span> |
| </span></span><span style=display:flex><span> <span style=color:#dc322f>void</span> <span style=color:#268bd2>deduct</span>(String commodityCode, <span style=color:#dc322f>int</span> count); |
| </span></span><span style=display:flex><span>} |
| </span></span></code></pre></div><h3 id=orderservice>OrderService</h3><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span><span style=color:#268bd2>public</span> <span style=color:#268bd2>interface</span> <span style=color:#268bd2>OrderService</span> { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#586e75>/** |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> * create order |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> */</span> |
| </span></span><span style=display:flex><span> Order <span style=color:#268bd2>create</span>(String userId, String commodityCode, <span style=color:#dc322f>int</span> orderCount); |
| </span></span><span style=display:flex><span>} |
| </span></span></code></pre></div><h3 id=accountservice>AccountService</h3><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span><span style=color:#268bd2>public</span> <span style=color:#268bd2>interface</span> <span style=color:#268bd2>AccountService</span> { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#586e75>/** |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> * debit balance of user's account |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> */</span> |
| </span></span><span style=display:flex><span> <span style=color:#dc322f>void</span> <span style=color:#268bd2>debit</span>(String userId, <span style=color:#dc322f>int</span> money); |
| </span></span><span style=display:flex><span>} |
| </span></span></code></pre></div><h3 id=main-business-logic>Main business logic</h3><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span><span style=color:#268bd2>public</span> <span style=color:#268bd2>class</span> <span style=color:#268bd2>BusinessServiceImpl</span> <span style=color:#268bd2>implements</span> BusinessService { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>private</span> StorageService storageService; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>private</span> OrderService orderService; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#586e75>/** |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> * purchase |
| </span></span></span><span style=display:flex><span><span style=color:#586e75> */</span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>public</span> <span style=color:#dc322f>void</span> <span style=color:#268bd2>purchase</span>(String userId, String commodityCode, <span style=color:#dc322f>int</span> orderCount) { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> storageService.deduct(commodityCode, orderCount); |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> orderService.create(userId, commodityCode, orderCount); |
| </span></span><span style=display:flex><span> } |
| </span></span><span style=display:flex><span>} |
| </span></span></code></pre></div><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span><span style=color:#268bd2>public</span> <span style=color:#268bd2>class</span> <span style=color:#268bd2>StorageServiceImpl</span> <span style=color:#268bd2>implements</span> StorageService { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>private</span> StorageDAO storageDAO; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>@Override</span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>public</span> <span style=color:#dc322f>void</span> <span style=color:#268bd2>deduct</span>(String commodityCode, <span style=color:#dc322f>int</span> count) { |
| </span></span><span style=display:flex><span> Storage storage <span style=color:#719e07>=</span> <span style=color:#719e07>new</span> Storage(); |
| </span></span><span style=display:flex><span> storage.setCount(count); |
| </span></span><span style=display:flex><span> storage.setCommodityCode(commodityCode); |
| </span></span><span style=display:flex><span> storageDAO.update(storage); |
| </span></span><span style=display:flex><span> } |
| </span></span><span style=display:flex><span>} |
| </span></span></code></pre></div><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span><span style=color:#268bd2>public</span> <span style=color:#268bd2>class</span> <span style=color:#268bd2>OrderServiceImpl</span> <span style=color:#268bd2>implements</span> OrderService { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>private</span> OrderDAO orderDAO; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>private</span> AccountService accountService; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>public</span> Order <span style=color:#268bd2>create</span>(String userId, String commodityCode, <span style=color:#dc322f>int</span> orderCount) { |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#dc322f>int</span> orderMoney <span style=color:#719e07>=</span> calculate(commodityCode, orderCount); |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> accountService.debit(userId, orderMoney); |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> Order order <span style=color:#719e07>=</span> <span style=color:#719e07>new</span> Order(); |
| </span></span><span style=display:flex><span> order.userId <span style=color:#719e07>=</span> userId; |
| </span></span><span style=display:flex><span> order.commodityCode <span style=color:#719e07>=</span> commodityCode; |
| </span></span><span style=display:flex><span> order.count <span style=color:#719e07>=</span> orderCount; |
| </span></span><span style=display:flex><span> order.money <span style=color:#719e07>=</span> orderMoney; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> <span style=color:#719e07>return</span> orderDAO.insert(order); |
| </span></span><span style=display:flex><span> } |
| </span></span><span style=display:flex><span>} |
| </span></span></code></pre></div><h2 id=distributed-transaction-solution-with-seata>Distributed Transaction Solution with Seata</h2><p><img src=/imgs/blog/fescar/fescar-2.png alt=undefined></p><p>We just need an annotation <code>@GlobalTransactional</code> on business method:</p><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-java data-lang=java><span style=display:flex><span> <span style=color:#268bd2>@GlobalTransactional</span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2>public</span> <span style=color:#dc322f>void</span> <span style=color:#268bd2>purchase</span>(String userId, String commodityCode, <span style=color:#dc322f>int</span> orderCount) { |
| </span></span><span style=display:flex><span> ...... |
| </span></span><span style=display:flex><span> } |
| </span></span></code></pre></div><h2 id=example-powered-by-dubbo--seata>Example powered by Dubbo + Seata</h2><h3 id=step-1-setup-database>Step 1: Setup database</h3><ul><li>Requirement: MySQL with InnoDB engine.</li></ul><p><strong>Note:</strong> In fact, there should be 3 database for the 3 services in the example use case. However, we can just create one database and configure 3 data sources for simple.</p><p>Modify Spring XML with the database URL/username/password you just created.</p><p>dubbo-account-service.xml |
| dubbo-order-service.xml |
| dubbo-storage-service.xml</p><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-xml data-lang=xml><span style=display:flex><span> <span style=color:#268bd2><property</span> name=<span style=color:#2aa198>"url"</span> value=<span style=color:#2aa198>"jdbc:mysql://x.x.x.x:3306/xxx"</span> <span style=color:#268bd2>/></span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2><property</span> name=<span style=color:#2aa198>"username"</span> value=<span style=color:#2aa198>"xxx"</span> <span style=color:#268bd2>/></span> |
| </span></span><span style=display:flex><span> <span style=color:#268bd2><property</span> name=<span style=color:#2aa198>"password"</span> value=<span style=color:#2aa198>"xxx"</span> <span style=color:#268bd2>/></span> |
| </span></span></code></pre></div><h3 id=step-2-create-undo_log-table-for-seata>Step 2: Create undo_log table for Seata</h3><p><code>UNDO_LOG</code> table is required by Seata AT mode.</p><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-sql data-lang=sql><span style=display:flex><span><span style=color:#586e75>-- Note that when Seata version is upgraded to 0.3.0+, it is changed from the previous normal index to the unique index. |
| </span></span></span><span style=display:flex><span><span style=color:#586e75></span><span style=color:#719e07>CREATE</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>`</span>undo_log<span style=color:#719e07>`</span> ( |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>id<span style=color:#719e07>`</span> <span style=color:#b58900>bigint</span>(<span style=color:#2aa198>20</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span> AUTO_INCREMENT, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>branch_id<span style=color:#719e07>`</span> <span style=color:#b58900>bigint</span>(<span style=color:#2aa198>20</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>xid<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>100</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>context<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>128</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>rollback_info<span style=color:#719e07>`</span> longblob <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>log_status<span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>log_created<span style=color:#719e07>`</span> datetime <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>log_modified<span style=color:#719e07>`</span> datetime <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>ext<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>100</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>PRIMARY</span> <span style=color:#719e07>KEY</span> (<span style=color:#719e07>`</span>id<span style=color:#719e07>`</span>), |
| </span></span><span style=display:flex><span> <span style=color:#719e07>UNIQUE</span> <span style=color:#719e07>KEY</span> <span style=color:#719e07>`</span>ux_undo_log<span style=color:#719e07>`</span> (<span style=color:#719e07>`</span>xid<span style=color:#719e07>`</span>,<span style=color:#719e07>`</span>branch_id<span style=color:#719e07>`</span>) |
| </span></span><span style=display:flex><span>) ENGINE<span style=color:#719e07>=</span>InnoDB AUTO_INCREMENT<span style=color:#719e07>=</span><span style=color:#2aa198>1</span> <span style=color:#719e07>DEFAULT</span> CHARSET<span style=color:#719e07>=</span>utf8; |
| </span></span></code></pre></div><h3 id=step-3-create-tables-for-example-business>Step 3: Create tables for example business</h3><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-sql data-lang=sql><span style=display:flex><span> |
| </span></span><span style=display:flex><span><span style=color:#719e07>DROP</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>IF</span> <span style=color:#719e07>EXISTS</span> <span style=color:#719e07>`</span>storage_tbl<span style=color:#719e07>`</span>; |
| </span></span><span style=display:flex><span><span style=color:#719e07>CREATE</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>`</span>storage_tbl<span style=color:#719e07>`</span> ( |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>id<span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span> AUTO_INCREMENT, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>commodity_code<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>255</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span><span style=color:#719e07>count</span><span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#2aa198>0</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>PRIMARY</span> <span style=color:#719e07>KEY</span> (<span style=color:#719e07>`</span>id<span style=color:#719e07>`</span>), |
| </span></span><span style=display:flex><span> <span style=color:#719e07>UNIQUE</span> <span style=color:#719e07>KEY</span> (<span style=color:#719e07>`</span>commodity_code<span style=color:#719e07>`</span>) |
| </span></span><span style=display:flex><span>) ENGINE<span style=color:#719e07>=</span>InnoDB <span style=color:#719e07>DEFAULT</span> CHARSET<span style=color:#719e07>=</span>utf8; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span><span style=color:#719e07>DROP</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>IF</span> <span style=color:#719e07>EXISTS</span> <span style=color:#719e07>`</span>order_tbl<span style=color:#719e07>`</span>; |
| </span></span><span style=display:flex><span><span style=color:#719e07>CREATE</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>`</span>order_tbl<span style=color:#719e07>`</span> ( |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>id<span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span> AUTO_INCREMENT, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>user_id<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>255</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>commodity_code<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>255</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span><span style=color:#719e07>count</span><span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#2aa198>0</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>money<span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#2aa198>0</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>PRIMARY</span> <span style=color:#719e07>KEY</span> (<span style=color:#719e07>`</span>id<span style=color:#719e07>`</span>) |
| </span></span><span style=display:flex><span>) ENGINE<span style=color:#719e07>=</span>InnoDB <span style=color:#719e07>DEFAULT</span> CHARSET<span style=color:#719e07>=</span>utf8; |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span><span style=color:#719e07>DROP</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>IF</span> <span style=color:#719e07>EXISTS</span> <span style=color:#719e07>`</span>account_tbl<span style=color:#719e07>`</span>; |
| </span></span><span style=display:flex><span><span style=color:#719e07>CREATE</span> <span style=color:#719e07>TABLE</span> <span style=color:#719e07>`</span>account_tbl<span style=color:#719e07>`</span> ( |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>id<span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>NOT</span> <span style=color:#719e07>NULL</span> AUTO_INCREMENT, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>user_id<span style=color:#719e07>`</span> <span style=color:#b58900>varchar</span>(<span style=color:#2aa198>255</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#719e07>NULL</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>`</span>money<span style=color:#719e07>`</span> <span style=color:#b58900>int</span>(<span style=color:#2aa198>11</span>) <span style=color:#719e07>DEFAULT</span> <span style=color:#2aa198>0</span>, |
| </span></span><span style=display:flex><span> <span style=color:#719e07>PRIMARY</span> <span style=color:#719e07>KEY</span> (<span style=color:#719e07>`</span>id<span style=color:#719e07>`</span>) |
| </span></span><span style=display:flex><span>) ENGINE<span style=color:#719e07>=</span>InnoDB <span style=color:#719e07>DEFAULT</span> CHARSET<span style=color:#719e07>=</span>utf8; |
| </span></span></code></pre></div><h3 id=step-4-start-seata-server>Step 4: Start Seata-Server</h3><ul><li>Download server <a href=https://github.com/seata/seata/releases>package</a>, unzip it.</li><li>Start Seata-Server</li></ul><div class=highlight><pre tabindex=0 style=color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-shell data-lang=shell><span style=display:flex><span>Usage: sh seata-server.sh<span style=color:#719e07>(</span><span style=color:#719e07>for</span> linux and mac<span style=color:#719e07>)</span> or cmd seata-server.bat<span style=color:#719e07>(</span><span style=color:#719e07>for</span> windows<span style=color:#719e07>)</span> <span style=color:#719e07>[</span>options<span style=color:#719e07>]</span> |
| </span></span><span style=display:flex><span> Options: |
| </span></span><span style=display:flex><span> --host, -h |
| </span></span><span style=display:flex><span> The host to bind. |
| </span></span><span style=display:flex><span> Default: 0.0.0.0 |
| </span></span><span style=display:flex><span> --port, -p |
| </span></span><span style=display:flex><span> The port to listen. |
| </span></span><span style=display:flex><span> Default: <span style=color:#2aa198>8091</span> |
| </span></span><span style=display:flex><span> --storeMode, -m |
| </span></span><span style=display:flex><span> log store mode : file、db |
| </span></span><span style=display:flex><span> Default: file |
| </span></span><span style=display:flex><span> --help |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span>e.g. |
| </span></span><span style=display:flex><span> |
| </span></span><span style=display:flex><span>sh seata-server.sh -p <span style=color:#2aa198>8091</span> -h 127.0.0.1 -m file |
| </span></span></code></pre></div><h3 id=step-5-run-example>Step 5: Run example</h3><ul><li>Start AccountService (<a href=https://github.com/apache/dubbo-integration-cases/blob/master/99-integration/dubbo-samples-transaction/src/main/java/org/apache/dubbo/samples/starter/DubboAccountServiceStarter.java>DubboAccountServiceStarter</a>).</li><li>Start StockService (<a href=https://github.com/apache/dubbo-integration-cases/blob/master/99-integration/dubbo-samples-transaction/src/main/java/org/apache/dubbo/samples/starter/DubboStorageServiceStarter.java>DubboStorageServiceStarter</a>).</li><li>Start OrderService (<a href=https://github.com/apache/dubbo-integration-cases/blob/master/99-integration/dubbo-samples-transaction/src/main/java/org/apache/dubbo/samples/starter/DubboOrderServiceStarter.java>DubboOrderServiceStarter</a>).</li><li>Run BusinessService for test (<a href=https://github.com/apache/dubbo-integration-cases/blob/master/99-integration/dubbo-samples-transaction/src/main/java/org/apache/dubbo/samples/starter/DubboBusinessTester.java>DubboBusinessTester</a>).</li></ul><h3 id=related-projects>Related projects</h3><ul><li>Seata: <a href=https://github.com/seata/seata>https://github.com/seata/seata</a></li><li>Seata Samples : <a href=https://github.com/seata/seata-samples>https://github.com/seata/seata-samples</a></li></ul><ul class="list-unstyled d-flex justify-content-between align-items-center mb-0 pt-5"><li><a href=/en/blog/2018/12/10/the-fifth-dubbo-meetup-has-been-held-in-hangzhou/ aria-label="Previous - The fifth Dubbo meetup has been held in Hangzhou" class="btn btn-primary"><span class=mr-1>←</span>Previous</a></li><li><a href=/en/blog/2019/02/20/implementation-background-and-practice-of-dubbo-server-asynchronous-interface/ aria-label="Next - Implementation background and practice of Dubbo server asynchronous interface" class="btn btn-primary">Next<span class=ml-1>→</span></a></li></ul></div><div id=pre-footer><h2>Feedback</h2><p class=feedback--prompt>Was this page helpful?</p><button class="btn btn-primary mb-4 feedback--yes">Yes</button> |
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