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itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">RocketMQ Streams 快速开始</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本：5.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">本页总览</button></div><div class="theme-doc-markdown markdown"><h1>RocketMQ Streams 快速开始</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="rocketmq-streams工程中运行">RocketMQ Streams工程中运行<a href="#rocketmq-streams工程中运行" class="hash-link" aria-label="RocketMQ Streams工程中运行的直接链接" title="RocketMQ Streams工程中运行的直接链接">​</a></h2><p>参考RocketMQ Streams工程rocketmq-streams-examples模块下程序可以直接运行；运行example步骤：</p><ul><li>本地启动RocketMQ 5.0及以上版本;</li><li>使用mqAdmin创建example中数据源topic；</li><li>启动example中例子；</li><li>向RocketMQ的源topic中写入合适数据（依据示例而定）；</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="rocketmq-streams以sdk方式被应用依赖">RocketMQ Streams以SDK方式被应用依赖<a href="#rocketmq-streams以sdk方式被应用依赖" class="hash-link" aria-label="RocketMQ Streams以SDK方式被应用依赖的直接链接" title="RocketMQ Streams以SDK方式被应用依赖的直接链接">​</a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="环境准备">环境准备<a href="#环境准备" class="hash-link" aria-label="环境准备的直接链接" title="环境准备的直接链接">​</a></h3><ul><li>64bit JDK 1.8及以上</li><li>Maven 3.2及以上</li><li>本地启动RocketMQ，<a href="https://rocketmq.apache.org/docs/quick-start/" target="_blank" rel="noopener noreferrer">启动文档</a></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="构建rocketmq-streams">构建RocketMQ Streams<a href="#构建rocketmq-streams" class="hash-link" aria-label="构建RocketMQ Streams的直接链接" title="构建RocketMQ Streams的直接链接">​</a></h3><h3 class="anchor anchorWithStickyNavbar_LWe7" id="添加pom依赖">添加pom依赖<a href="#添加pom依赖" class="hash-link" aria-label="添加pom依赖的直接链接" title="添加pom依赖的直接链接">​</a></h3><div class="language-xml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-xml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34">&lt;</span><span class="token tag" style="color:#00009f">dependencies</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34">&lt;</span><span class="token tag" style="color:#00009f">dependency</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34">&lt;</span><span class="token tag" style="color:#00009f">groupId</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain">org.apache.rocketmq</span><span class="token tag punctuation" style="color:#393A34">&lt;/</span><span class="token tag" style="color:#00009f">groupId</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34">&lt;</span><span class="token tag" style="color:#00009f">artifactId</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain">rocketmq-streams</span><span class="token tag punctuation" style="color:#393A34">&lt;/</span><span class="token tag" style="color:#00009f">artifactId</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token comment" style="color:#999988;font-style:italic">&lt;!-- 根据需要修改 --&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34">&lt;</span><span class="token tag" style="color:#00009f">version</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain">1.1.0</span><span class="token tag punctuation" style="color:#393A34">&lt;/</span><span class="token tag" style="color:#00009f">version</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token tag punctuation" style="color:#393A34">&lt;/</span><span class="token tag" style="color:#00009f">dependency</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token tag punctuation" style="color:#393A34">&lt;/</span><span class="token tag" style="color:#00009f">dependencies</span><span class="token tag punctuation" style="color:#393A34">&gt;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" 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 viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="编写流计算程序">编写流计算程序<a href="#编写流计算程序" class="hash-link" aria-label="编写流计算程序的直接链接" title="编写流计算程序的直接链接">​</a></h3><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><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:#393A34"><span class="token plain">public class WordCount {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public static void main(String[] args) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> StreamBuilder builder = new StreamBuilder(&quot;wordCount&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> builder.source(&quot;sourceTopic&quot;, total -&gt; {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> String value = new String(total, StandardCharsets.UTF_8);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return new Pair&lt;&gt;(null, value);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> })</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> .flatMap((ValueMapperAction&lt;String, List&lt;String&gt;&gt;) value -&gt; {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> String[] splits = value.toLowerCase().split(&quot;\\W+&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> return Arrays.asList(splits);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> })</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> .keyBy(value -&gt; value)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> .count()</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> .toRStream()</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> .print();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> TopologyBuilder topologyBuilder = builder.build();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Properties properties = new Properties();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> properties.put(MixAll.NAMESRV_ADDR_PROPERTY, &quot;127.0.0.1:9876&quot;);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> RocketMQStream rocketMQStream = new RocketMQStream(topologyBuilder, properties);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> final CountDownLatch latch = new CountDownLatch(1);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> Runtime.getRuntime().addShutdownHook(new Thread(&quot;wordcount-shutdown-hook&quot;) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> @Override</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> public void run() {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> rocketMQStream.stop();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> latch.countDown();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> });</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> try {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> rocketMQStream.start();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> latch.await();</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> } catch (final Throwable e) {</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.exit(1);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> System.exit(0);</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> }</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" 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 viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="向rocketmq-sourcetopic中写入数据并观察结果">向RocketMQ sourceTopic中写入数据并观察结果<a href="#向rocketmq-sourcetopic中写入数据并观察结果" class="hash-link" aria-label="向RocketMQ sourceTopic中写入数据并观察结果的直接链接" title="向RocketMQ sourceTopic中写入数据并观察结果的直接链接">​</a></h3><p>如果向sourceTopic中写入的数据如下：每行数据作为一个消息发送；</p><div class="language-xml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-xml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&quot;To be, or not to be,--that is the question:--&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;Whether &#x27;tis nobler in the mind to suffer&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;The slings and arrows of outrageous fortune&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;Or to take arms against a sea of troubles,&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;And by opposing end them?--To die,--to sleep,--&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;No more; and by a sleep to say we end&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;The heartache, and the thousand natural shocks&quot;,</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">&quot;That flesh is heir to,--&#x27;tis a consummation&quot;,</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" 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 viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>统计单词出现频率，计算结果如下：</p><div class="language-xml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-xml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=be, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=or, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=not, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=be, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=that, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=is, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=the, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=whether, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=tis, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=nobler, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=mind, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=against, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=troubles, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=slings, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=die, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=natural, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=flesh, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=sea, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=fortune, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=shocks, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=consummation, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=3)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=4)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=5)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=say, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=end, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=end, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=6)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=7)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=to, value=8)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=or, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=them, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=take, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=arms, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=of, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=and, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=of, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=and, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=by, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=sleep, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=and, value=3)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=by, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=sleep, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=and, value=4)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=that, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=arrows, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=heir, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=question, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=is, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=the, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=suffer, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=a, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=the, value=3)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=no, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=a, value=2)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=opposing, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=the, value=4)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=the, value=5)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=a, value=3)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=in, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=more, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=heartache, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=outrageous, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=we, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=thousand, value=1)</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">(key=tis, value=2)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" 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 viewBox="0 0 24 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