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padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="theme-doc-version-banner alert alert--warning margin-bottom--md" role="alert"><div>This is documentation for <!-- -->Apache InLong<!-- --> <b>1.10.0</b>, which is no longer actively maintained.</div><div class="margin-top--md">For up-to-date documentation, see the <b><a href="/zh-CN/docs/development/inlong_manager_plugin">latest version</a></b> (<!-- -->1.11.0<!-- -->).</div></div><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="页面路径"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="主页面" class="breadcrumbs__link" href="/zh-CN/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">开发指引</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Manager 自定义插件</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本：1.10.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Manager 自定义插件</h1></header><h2 class="anchor anchorWithStickyNavbar_LWe7" id="总览">总览<a href="#总览" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>本文面向 InLong-Manager 插件开发人员, 尝试尽可能全面地阐述开发一个 Manager 插件所经过的历程，力求消除开发者的困惑，让插件开发变得简单。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="开发之前">开发之前<a href="#开发之前" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><ul><li>Inlong 作为一个流式数据同步框架，采用 Group + Stream 的构建方式。</li><li>Inlong Group 可包含多个 Inlong Stream, 每个 Inlong Stream 负责一条独立的数据同步链路。</li><li>Inlong Group 负责任务所需的物理资源的定义及初始化，这些物理资源主要包括数据同步所需的中间件集群及 Sort 函数；该 Group 下所有的 Stream 共享这些资源。</li><li>Inlong Manager 通过 <strong>CreateGroupWorkflowDefinition</strong> 这个工作流创建对应的 Inlong Group 并初始化所有的物理资源, 每个工作流包括数个相互独立的 Service Task。当这个工作流被创建并执行时, 麾下的 Service Task 按照预先定义的顺序依次执行。</li><li>Service Task 采用<strong>监听者模式</strong>——也被称作<strong>发布-订阅模式</strong>构建, 每一个独立的 task 会注册一个或多个 Listener (监听器). Listener 接受工作流上下文信息并执行相关的逻辑。</li><li>作为开发人员, 你需要开发原生 Listener 以实现自定义的操作逻辑。</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="流程图示">流程图示<a href="#流程图示" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><ul><li><p>Inlong Manager 插件机制如下图所示:</p><p><img loading="lazy" src="/zh-CN/assets/images/inlong_plugin-189f358c3cf91a3814a31d3f43d8692b.png" width="1471" height="696" class="img_ev3q"></p></li><li><p>如图所示，插件需要被放置在安装路径之下, 当 Inlong Manager 进程启动时，会自动寻找插件编译的 jar 包并加载其中的代码。</p></li></ul><p><img loading="lazy" src="/zh-CN/assets/images/plugin_location-c07bc755eb46f282a2e4dea5747a39d0.png" width="2042" height="210" class="img_ev3q"></p><ul><li>作为开发人员，当你看到下图所示的日志时，可以确认插件已经加载成功了:</li></ul><p><img loading="lazy" src="/zh-CN/assets/images/plugin_log-e98df1d61e487d1b747315d1297314a3.png" width="3012" height="850" class="img_ev3q"></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="参考-demo">参考 Demo<a href="#参考-demo" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><ul><li>为方便开发人员理解. 我们在 Inlong Manager 目录下增加了 <strong>*manager-plugins</strong> , 开发人员可参考 <strong>FlinkSortProcessPlugin</strong> 进行自己的插件开发; 或者按照如下的案例开发插件；</li></ul><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">public class EmptyProcessPlugin implements ProcessPlugin {</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> @Override</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> public Map<DataSourceOperateListener, EventSelector> createSourceOperateListeners() {</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> return new LinkedHashMap<>();</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> @Override</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> public Map<QueueOperateListener, EventSelector> createQueueOperateListeners() {</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> return new LinkedHashMap<>();</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> @Override</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> public Map<SortOperateListener, EventSelector> createSortOperateListeners() {</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> return ProcessPlugin.super.createSortOperateListeners();</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> @Override</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> public Map<SinkOperateListener, EventSelector> createSinkOperateListeners() {</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> return ProcessPlugin.super.createSinkOperateListeners();</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ul><li><strong>DataSourceOperateListener</strong>,<strong>QueueOperateListener</strong>,<strong>SortOperateListener</strong>,<strong>SinkOperateListener</strong> 是 <strong>TaskEventListener</strong> 的子类, 分别负责源数据端，消息队列，sort 函数，目标数据端的初始化工作。 与 Listener 绑定的<strong>EventSelector</strong>决定该 Listener 是否在运行时被激活。</li></ul><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">public interface EventSelector {</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> boolean accept(WorkflowContext context);</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ul><li>完成插件的开发工作后, 你需要编写对应的<strong>Yaml</strong>格式的插件定义文件, 将其放置在工程目录 resources/META-INF 下。</li></ul><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> example</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token key atrule">description</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> example for manager plugin</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token key atrule">javaVersion</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> </span><span class="token number">1.8</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token key atrule">pluginClass</span><span class="token punctuation" style="color:rgb(248, 248, 242)">:</span><span class="token plain"> org.apache.inlong.manager.plugin.EmptyProcessPlugin</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ul><li>如果你不确定怎样开发一个可用的 Listener ,请参考<code>org.apache.inlong.manager.service.workflow.listener.GroupTaskListenerFactory</code>中原生 Listener 的逻辑。</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="写在最后">写在最后<a href="#写在最后" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>我们在 Inlong Manager 中提供插件化机制，希望可以方便开发人员在 Inlong 现有的框架下定制化开发自己的功能。 |
