content/references/java-chassis/en_US/build-provider/definition/heartbeats/index.html

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href="../../../edge/open-service/">Intruductions</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../edge/by-servicecomb-sdk/">Using Edge Service</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../edge/nginx/">Using confd and Nginx as edge services</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../edge/zuul/">Use zuul as edge services</a> </li> </ul> <p class="caption"><span class="caption-text">Service Packing and Running</span></p> <ul> <li class="toctree-l1"><a class="reference internal" href="../../../packaging/standalone/">Standalone mode</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../packaging/web-container/">WEB container mode</a> </li> </ul> <p class="caption"><span class="caption-text">Micro Service Security</span></p> <ul> <li class="toctree-l1"><a class="reference internal" href="../../../security/tls/">Using TLS</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../security/rsa/">Using RSA certification</a> </li> </ul> <p class="caption"><span class="caption-text">Using java chassis in Spring Boot</span></p> <ul> <li class="toctree-l1"><a class="reference internal" href="../../../using-java-chassis-in-spring-boot/using-java-chassis-in-spring-boot/">Intruductions</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../using-java-chassis-in-spring-boot/components-for-spring-boot/">spring boot starter for java-chassis</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../using-java-chassis-in-spring-boot/java-application/">JAVA application development</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../using-java-chassis-in-spring-boot/web-application/">Web development method development</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../using-java-chassis-in-spring-boot/diff-between-java-web/">The difference between JAVA application method and Web development method</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../using-java-chassis-in-spring-boot/diff-spring-mvc/">The difference in Spring MVC mode</a> </li> </ul> <p class="caption"><span class="caption-text">Handlers reference</span></p> <ul> <li class="toctree-l1"><a class="reference internal" href="../../../references-handlers/intruduction/">Intruductions</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../references-handlers/loadbalance/">Load Balancing</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../references-handlers/publickey/">Public key authentication</a> </li> </ul> <p class="caption"><span class="caption-text">FAQ</span></p> <ul> <li class="toctree-l1"><a class="reference internal" href="../../../question-and-answer/question_answer/">Q & A</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../question-and-answer/faq/">FAQ</a> </li> <li class="toctree-l1"><a class="reference internal" href="../../../question-and-answer/interface-compatibility/">Micro Service Interface Compatibility FAQ</a> </li> </ul> </div> </div> </nav> <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> <nav class="wy-nav-top" role="navigation" aria-label="Mobile navigation menu"> <i data-toggle="wy-nav-top" class="fa fa-bars"></i> <a href="../../..">ServiceComb Java Chassis Developers Guide</a> </nav> <div class="wy-nav-content"> <div class="rst-content"><div role="navigation" aria-label="breadcrumbs navigation"> <ul class="wy-breadcrumbs"> <li><a href="../../.." class="icon icon-home" alt="Docs"></a> »</li> <li>Heartbeats</li> <li class="wy-breadcrumbs-aside"> </li> </ul> <hr/> </div> <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article"> <div class="section" itemprop="articleBody"> <h2 id="_1">场景描述</h2> <p>当微服务实例注册到服务中心后，微服务需要定时向服务中心发送心跳。若服务中心在一定时间内没有收到心跳信息，则会注销此实例。</p> <h2 id="api">涉及API</h2> <ul> <li><code>org.apache.servicecomb.serviceregistry.client.ServiceRegistryClient</code>：服务中心客户端</li> </ul> <h2 id="_2">配置说明</h2> <p><code>ServiceRegistryClient</code>提供了发送心跳的方法<code>heartbeat</code>，用户直接调用即可，示例代码如下：</p> <pre><code class="language-java">public static void main(String[] args) throws Exception { // 首先需要注册微服务和实例…… // 发送心跳，不然实例会消失 while (true) { System.out.println("heartbeat sended:" + client.heartbeat(service2.getServiceId(), instance.getInstanceId())); Thread.sleep(3000); } } </code></pre> </div> </div><footer> <hr/> <div role="contentinfo">  </div> Built with <a href="https://www.mkdocs.org/">MkDocs</a> using a <a href="https://github.com/readthedocs/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. </footer> </div> </div> </section> </div> <div class="rst-versions" role="note" aria-label="Versions"> <span class="rst-current-version" data-toggle="rst-current-version"> </span> </div> <script>var base_url = 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