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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, which is no longer actively maintained.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="/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="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><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">Development</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 Custom Plugin</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 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 Custom Plugin</h1></header><h2 class="anchor anchorWithStickyNavbar_LWe7" id="overview">Overview<a href="#overview" class="hash-link" aria-label="Direct link to Overview" title="Direct link to Overview"></a></h2><p>This article is aimed at InLong-Manager plugin developers, trying to explain the process of developing an Manager plugin as comprehensively as possible, and strive to eliminate the confusion of developers and make plugin development easier.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="before-development">Before Development<a href="#before-development" class="hash-link" aria-label="Direct link to Before Development" title="Direct link to Before Development"></a></h2><ul><li>Inlong is stream processing framework constructed with a Group + Stream architecture.</li><li>An Inlong Group contains more than one Inlong Stream, each Inlong Stream is capable of a single individual dataflow.</li><li>Inlong Group is responsible for physical resource definition shared by all Inlong Streams included, especially middleware clusters and sort functions.</li><li>In order to create Inlong Group, Inlong Manager use <strong>CreateGroupWorkflowDefinition</strong> to init all necessary physical resources, a workflow definition contains several individual service tasks. When it's created and processed, service tasks will be executed one after another.</li><li>Service task is constructed in <strong>observer pattern</strong>, which also known as the <strong>publish-subscribe pattern</strong>, each service task will register several task listeners. Listener accepts workflow context and controls execution logic on physical resources.</li><li>As a developer, you need to develop specific Listener with personalized logic.</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="demonstration">Demonstration<a href="#demonstration" class="hash-link" aria-label="Direct link to Demonstration" title="Direct link to Demonstration"></a></h2><ul><li>The Inlong Manager plugin mechanism can be represented by the following figure:</li></ul><p><img loading="lazy" src="/assets/images/inlong_plugin-189f358c3cf91a3814a31d3f43d8692b.png" width="1471" height="696" class="img_ev3q"></p><ul><li>When Inlong Manager is deployed, plugins must be located under installation directory, then <strong>Manager Process</strong> will find the plugin jar and install the plugin automatically.</li></ul><p><img loading="lazy" src="/assets/images/plugin_location-c07bc755eb46f282a2e4dea5747a39d0.png" width="2042" height="210" class="img_ev3q"></p><ul><li>As a developer, you can confirm your plugin be loaded successfully by searching logs below:</li></ul><p><img loading="lazy" src="/assets/images/plugin_log-e98df1d61e487d1b747315d1297314a3.png" width="3012" height="850" class="img_ev3q"></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="reference-demo">Reference Demo<a href="#reference-demo" class="hash-link" aria-label="Direct link to Reference Demo" title="Direct link to Reference Demo"></a></h2><ul><li>For helping all Inlong developers. We hava provide <strong>manager-plugins</strong> in Inlong Manager Module, which provide <strong>FlinkSortProcessPlugin</strong> as an example; or you can create <strong>ProcessPlugin</strong> as below;</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> are child_classes extended from <strong>TaskEventListener</strong>. Then <strong>EventSelector</strong> decides whether the listener should be triggered.</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>After developing you plugin, you should prepare plugin definition file in <strong>Yaml</strong>, and put it under resources/META-INF.</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>To develop available Listeners , you can refer to the native Listeners in <code>org.apache.inlong.manager.service.workflow.listener.GroupTaskListenerFactory</code></li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="last-but-not-least">Last but not Least<a href="#last-but-not-least" class="hash-link" aria-label="Direct link to Last but not Least" title="Direct link to Last but not Least"></a></h2><p>We provide the plugin mechanism in Inlong Manager make it easier and more convenient for developers to customize personalized logic when Inlong is not supported. |
