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聊一下 RocketMQ 的 NameServer 源码
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<time title="Created: 2020-07-05 21:01:47 / Modified: 21:03:29" itemprop="dateCreated datePublished" datetime="2020-07-05T21:01:47+08:00">2020-07-05</time>
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,
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<p>前面介绍了，nameserver相当于dubbo的注册中心，用与管理broker，broker会在启动的时候注册到nameserver，并且会发送心跳给namaserver，nameserver负责保存活跃的broker，包括master和slave，同时保存topic和topic下的队列，以及filter列表，然后为producer和consumer的请求提供服务。</p>
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<h3 id="启动过程"><a href="#启动过程" class="headerlink" title="启动过程"></a>启动过程</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> </span>{</span><br><span class="line"> main0(args);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> NamesrvController <span class="title">main0</span><span class="params">(String[] args)</span> </span>{</span><br><span class="line"></span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> NamesrvController controller = createNamesrvController(args);</span><br><span class="line"> start(controller);</span><br><span class="line"> String tip = <span class="string">"The Name Server boot success. serializeType="</span> + RemotingCommand.getSerializeTypeConfigInThisServer();</span><br><span class="line"> log.info(tip);</span><br><span class="line"> System.out.printf(<span class="string">"%s%n"</span>, tip);</span><br><span class="line"> <span class="keyword">return</span> controller;</span><br><span class="line"> } <span class="keyword">catch</span> (Throwable e) {</span><br><span class="line"> e.printStackTrace();</span><br><span class="line"> System.exit(-<span class="number">1</span>);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">null</span>;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>入口的代码时这样子，其实主要的逻辑在createNamesrvController和start方法，来看下这两个的实现</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">static</span> NamesrvController <span class="title">createNamesrvController</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> IOException, JoranException </span>{</span><br><span class="line"> System.setProperty(RemotingCommand.REMOTING_VERSION_KEY, Integer.toString(MQVersion.CURRENT_VERSION));</span><br><span class="line"> <span class="comment">//PackageConflictDetect.detectFastjson();</span></span><br><span class="line"></span><br><span class="line"> Options options = ServerUtil.buildCommandlineOptions(<span class="keyword">new</span> Options());</span><br><span class="line"> commandLine = ServerUtil.parseCmdLine(<span class="string">"mqnamesrv"</span>, args, buildCommandlineOptions(options), <span class="keyword">new</span> PosixParser());</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == commandLine) {</span><br><span class="line"> System.exit(-<span class="number">1</span>);</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">null</span>;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">final</span> NamesrvConfig namesrvConfig = <span class="keyword">new</span> NamesrvConfig();</span><br><span class="line"> <span class="keyword">final</span> NettyServerConfig nettyServerConfig = <span class="keyword">new</span> NettyServerConfig();</span><br><span class="line"> nettyServerConfig.setListenPort(<span class="number">9876</span>);</span><br><span class="line"> <span class="keyword">if</span> (commandLine.hasOption(<span class="string">'c'</span>)) {</span><br><span class="line"> String file = commandLine.getOptionValue(<span class="string">'c'</span>);</span><br><span class="line"> <span class="keyword">if</span> (file != <span class="keyword">null</span>) {</span><br><span class="line"> InputStream in = <span class="keyword">new</span> BufferedInputStream(<span class="keyword">new</span> FileInputStream(file));</span><br><span class="line"> properties = <span class="keyword">new</span> Properties();</span><br><span class="line"> properties.load(in);</span><br><span class="line"> MixAll.properties2Object(properties, namesrvConfig);</span><br><span class="line"> MixAll.properties2Object(properties, nettyServerConfig);</span><br><span class="line"></span><br><span class="line"> namesrvConfig.setConfigStorePath(file);</span><br><span class="line"></span><br><span class="line"> System.out.printf(<span class="string">"load config properties file OK, %s%n"</span>, file);</span><br><span class="line"> in.close();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (commandLine.hasOption(<span class="string">'p'</span>)) {</span><br><span class="line"> InternalLogger console = InternalLoggerFactory.getLogger(LoggerName.NAMESRV_CONSOLE_NAME);</span><br><span class="line"> MixAll.printObjectProperties(console, namesrvConfig);</span><br><span class="line"> MixAll.printObjectProperties(console, nettyServerConfig);</span><br><span class="line"> System.exit(<span class="number">0</span>);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> MixAll.properties2Object(ServerUtil.commandLine2Properties(commandLine), namesrvConfig);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == namesrvConfig.getRocketmqHome()) {</span><br><span class="line"> System.out.printf(<span class="string">"Please set the %s variable in your environment to match the location of the RocketMQ installation%n"</span>, MixAll.ROCKETMQ_HOME_ENV);</span><br><span class="line"> System.exit(-<span class="number">2</span>);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();</span><br><span class="line"> JoranConfigurator configurator = <span class="keyword">new</span> JoranConfigurator();</span><br><span class="line"> configurator.setContext(lc);</span><br><span class="line"> lc.reset();</span><br><span class="line"> configurator.doConfigure(namesrvConfig.getRocketmqHome() + <span class="string">"/conf/logback_namesrv.xml"</span>);</span><br><span class="line"></span><br><span class="line"> log = InternalLoggerFactory.getLogger(LoggerName.NAMESRV_LOGGER_NAME);</span><br><span class="line"></span><br><span class="line"> MixAll.printObjectProperties(log, namesrvConfig);</span><br><span class="line"> MixAll.printObjectProperties(log, nettyServerConfig);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">final</span> NamesrvController controller = <span class="keyword">new</span> NamesrvController(namesrvConfig, nettyServerConfig);</span><br><span class="line"></span><br><span class="line"> <span class="comment">// remember all configs to prevent discard</span></span><br><span class="line"> controller.getConfiguration().registerConfig(properties);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> controller;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>这个方法里其实主要是读取一些配置啥的，不是很复杂，</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">static</span> NamesrvController <span class="title">start</span><span class="params">(<span class="keyword">final</span> NamesrvController controller)</span> <span class="keyword">throws</span> Exception </span>{</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == controller) {</span><br><span class="line"> <span class="keyword">throw</span> <span class="keyword">new</span> IllegalArgumentException(<span class="string">"NamesrvController is null"</span>);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">boolean</span> initResult = controller.initialize();</span><br><span class="line"> <span class="keyword">if</span> (!initResult) {</span><br><span class="line"> controller.shutdown();</span><br><span class="line"> System.exit(-<span class="number">3</span>);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> Runtime.getRuntime().addShutdownHook(<span class="keyword">new</span> ShutdownHookThread(log, <span class="keyword">new</span> Callable<Void>() {</span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> Void <span class="title">call</span><span class="params">()</span> <span class="keyword">throws</span> Exception </span>{</span><br><span class="line"> controller.shutdown();</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">null</span>;</span><br><span class="line"> }</span><br><span class="line"> }));</span><br><span class="line"></span><br><span class="line"> controller.start();</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> controller;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>这个start里主要关注initialize方法，后面就是一个停机的hook，来看下initialize方法</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">initialize</span><span class="params">()</span> </span>{</span><br><span class="line"></span><br><span class="line"> <span class="keyword">this</span>.kvConfigManager.load();</span><br><span class="line"></span><br><span class="line"> <span class="keyword">this</span>.remotingServer = <span class="keyword">new</span> NettyRemotingServer(<span class="keyword">this</span>.nettyServerConfig, <span class="keyword">this</span>.brokerHousekeepingService);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">this</span>.remotingExecutor =</span><br><span class="line"> Executors.newFixedThreadPool(nettyServerConfig.getServerWorkerThreads(), <span class="keyword">new</span> ThreadFactoryImpl(<span class="string">"RemotingExecutorThread_"</span>));</span><br><span class="line"></span><br><span class="line"> <span class="keyword">this</span>.registerProcessor();</span><br><span class="line"></span><br><span class="line"> <span class="keyword">this</span>.scheduledExecutorService.scheduleAtFixedRate(<span class="keyword">new</span> Runnable() {</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">run</span><span class="params">()</span> </span>{</span><br><span class="line"> NamesrvController.<span class="keyword">this</span>.routeInfoManager.scanNotActiveBroker();</span><br><span class="line"> }</span><br><span class="line"> }, <span class="number">5</span>, <span class="number">10</span>, TimeUnit.SECONDS);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">this</span>.scheduledExecutorService.scheduleAtFixedRate(<span class="keyword">new</span> Runnable() {</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">run</span><span class="params">()</span> </span>{</span><br><span class="line"> NamesrvController.<span class="keyword">this</span>.kvConfigManager.printAllPeriodically();</span><br><span class="line"> }</span><br><span class="line"> }, <span class="number">1</span>, <span class="number">10</span>, TimeUnit.MINUTES);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (TlsSystemConfig.tlsMode != TlsMode.DISABLED) {</span><br><span class="line"> <span class="comment">// Register a listener to reload SslContext</span></span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> fileWatchService = <span class="keyword">new</span> FileWatchService(</span><br><span class="line"> <span class="keyword">new</span> String[] {</span><br><span class="line"> TlsSystemConfig.tlsServerCertPath,</span><br><span class="line"> TlsSystemConfig.tlsServerKeyPath,</span><br><span class="line"> TlsSystemConfig.tlsServerTrustCertPath</span><br><span class="line"> },</span><br><span class="line"> <span class="keyword">new</span> FileWatchService.Listener() {</span><br><span class="line"> <span class="keyword">boolean</span> certChanged, keyChanged = <span class="keyword">false</span>;</span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">onChanged</span><span class="params">(String path)</span> </span>{</span><br><span class="line"> <span class="keyword">if</span> (path.equals(TlsSystemConfig.tlsServerTrustCertPath)) {</span><br><span class="line"> log.info(<span class="string">"The trust certificate changed, reload the ssl context"</span>);</span><br><span class="line"> reloadServerSslContext();</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (path.equals(TlsSystemConfig.tlsServerCertPath)) {</span><br><span class="line"> certChanged = <span class="keyword">true</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (path.equals(TlsSystemConfig.tlsServerKeyPath)) {</span><br><span class="line"> keyChanged = <span class="keyword">true</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (certChanged && keyChanged) {</span><br><span class="line"> log.info(<span class="string">"The certificate and private key changed, reload the ssl context"</span>);</span><br><span class="line"> certChanged = keyChanged = <span class="keyword">false</span>;</span><br><span class="line"> reloadServerSslContext();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="function"><span class="keyword">private</span> <span class="keyword">void</span> <span class="title">reloadServerSslContext</span><span class="params">()</span> </span>{</span><br><span class="line"> ((NettyRemotingServer) remotingServer).loadSslContext();</span><br><span class="line"> }</span><br><span class="line"> });</span><br><span class="line"> } <span class="keyword">catch</span> (Exception e) {</span><br><span class="line"> log.warn(<span class="string">"FileWatchService created error, can't load the certificate dynamically"</span>);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>这里的kvConfigManager主要是来加载NameServer的配置参数，存到org.apache.rocketmq.namesrv.kvconfig.KVConfigManager#configTable中，然后是以BrokerHousekeepingService对象为参数初始化NettyRemotingServer对象，BrokerHousekeepingService对象作为该Netty连接中Socket链接的监听器（ChannelEventListener）；监听与Broker建立的渠道的状态（空闲、关闭、异常三个状态），并调用BrokerHousekeepingService的相应onChannel方法。其中渠道的空闲、关闭、异常状态均调用RouteInfoManager.onChannelDestory方法处理。这个BrokerHousekeepingService可以字面化地理解为broker的管家服务，这个类内部三个状态方法其实都是调用的org.apache.rocketmq.namesrv.NamesrvController#getRouteInfoManager方法，而这个RouteInfoManager里面的对象有这些</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">RouteInfoManager</span> </span>{</span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> InternalLogger log = InternalLoggerFactory.getLogger(LoggerName.NAMESRV_LOGGER_NAME);</span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> <span class="keyword">static</span> <span class="keyword">long</span> BROKER_CHANNEL_EXPIRED_TIME = <span class="number">1000</span> * <span class="number">60</span> * <span class="number">2</span>;</span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> ReadWriteLock lock = <span class="keyword">new</span> ReentrantReadWriteLock();</span><br><span class="line"> <span class="comment">// topic与queue的对应关系</span></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> HashMap<String<span class="comment">/* topic */</span>, List<QueueData>> topicQueueTable;</span><br><span class="line"> <span class="comment">// Broker名称与broker属性的map</span></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> HashMap<String<span class="comment">/* brokerName */</span>, BrokerData> brokerAddrTable;</span><br><span class="line"> <span class="comment">// 集群与broker集合的对应关系</span></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> HashMap<String<span class="comment">/* clusterName */</span>, Set<String<span class="comment">/* brokerName */</span>>> clusterAddrTable;</span><br><span class="line"> <span class="comment">// 活跃的broker信息</span></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> HashMap<String<span class="comment">/* brokerAddr */</span>, BrokerLiveInfo> brokerLiveTable;</span><br><span class="line"> <span class="comment">// Broker地址与过滤器</span></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> HashMap<String<span class="comment">/* brokerAddr */</span>, List<String><span class="comment">/* Filter Server */</span>> filterServerTable;</span><br></pre></td></tr></table></figure>
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<p>然后接下去就是初始化了一个线程池，然后注册默认的处理类<code>this.registerProcessor();</code>默认都是这个处理器去处理请求 <code>org.apache.rocketmq.namesrv.processor.DefaultRequestProcessor#DefaultRequestProcessor</code>然后是初始化两个定时任务</p>
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<p>第一是每10秒检查一遍Broker的状态的定时任务，调用scanNotActiveBroker方法；遍历brokerLiveTable集合，查看每个broker的最后更新时间（BrokerLiveInfo.lastUpdateTimestamp）是否超过2分钟，若超过则关闭该broker的渠道并调用RouteInfoManager.onChannelDestory方法清理RouteInfoManager类的topicQueueTable、brokerAddrTable、clusterAddrTable、filterServerTable成员变量。</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br><span class="line">136</span><br><span class="line">137</span><br><span class="line">138</span><br><span class="line">139</span><br><span class="line">140</span><br><span class="line">141</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">this</span>.scheduledExecutorService.scheduleAtFixedRate(<span class="keyword">new</span> Runnable() {</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">run</span><span class="params">()</span> </span>{</span><br><span class="line"> NamesrvController.<span class="keyword">this</span>.routeInfoManager.scanNotActiveBroker();</span><br><span class="line"> }</span><br><span class="line"> }, <span class="number">5</span>, <span class="number">10</span>, TimeUnit.SECONDS);</span><br><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">scanNotActiveBroker</span><span class="params">()</span> </span>{</span><br><span class="line"> Iterator<Entry<String, BrokerLiveInfo>> it = <span class="keyword">this</span>.brokerLiveTable.entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (it.hasNext()) {</span><br><span class="line"> Entry<String, BrokerLiveInfo> next = it.next();</span><br><span class="line"> <span class="keyword">long</span> last = next.getValue().getLastUpdateTimestamp();</span><br><span class="line"> <span class="keyword">if</span> ((last + BROKER_CHANNEL_EXPIRED_TIME) < System.currentTimeMillis()) {</span><br><span class="line"> RemotingUtil.closeChannel(next.getValue().getChannel());</span><br><span class="line"> it.remove();</span><br><span class="line"> log.warn(<span class="string">"The broker channel expired, {} {}ms"</span>, next.getKey(), BROKER_CHANNEL_EXPIRED_TIME);</span><br><span class="line"> <span class="keyword">this</span>.onChannelDestroy(next.getKey(), next.getValue().getChannel());</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">onChannelDestroy</span><span class="params">(String remoteAddr, Channel channel)</span> </span>{</span><br><span class="line"> String brokerAddrFound = <span class="keyword">null</span>;</span><br><span class="line"> <span class="keyword">if</span> (channel != <span class="keyword">null</span>) {</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">this</span>.lock.readLock().lockInterruptibly();</span><br><span class="line"> Iterator<Entry<String, BrokerLiveInfo>> itBrokerLiveTable =</span><br><span class="line"> <span class="keyword">this</span>.brokerLiveTable.entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (itBrokerLiveTable.hasNext()) {</span><br><span class="line"> Entry<String, BrokerLiveInfo> entry = itBrokerLiveTable.next();</span><br><span class="line"> <span class="keyword">if</span> (entry.getValue().getChannel() == channel) {</span><br><span class="line"> brokerAddrFound = entry.getKey();</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">finally</span> {</span><br><span class="line"> <span class="keyword">this</span>.lock.readLock().unlock();</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">catch</span> (Exception e) {</span><br><span class="line"> log.error(<span class="string">"onChannelDestroy Exception"</span>, e);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == brokerAddrFound) {</span><br><span class="line"> brokerAddrFound = remoteAddr;</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> log.info(<span class="string">"the broker's channel destroyed, {}, clean it's data structure at once"</span>, brokerAddrFound);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (brokerAddrFound != <span class="keyword">null</span> && brokerAddrFound.length() > <span class="number">0</span>) {</span><br><span class="line"></span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">this</span>.lock.writeLock().lockInterruptibly();</span><br><span class="line"> <span class="keyword">this</span>.brokerLiveTable.remove(brokerAddrFound);</span><br><span class="line"> <span class="keyword">this</span>.filterServerTable.remove(brokerAddrFound);</span><br><span class="line"> String brokerNameFound = <span class="keyword">null</span>;</span><br><span class="line"> <span class="keyword">boolean</span> removeBrokerName = <span class="keyword">false</span>;</span><br><span class="line"> Iterator<Entry<String, BrokerData>> itBrokerAddrTable =</span><br><span class="line"> <span class="keyword">this</span>.brokerAddrTable.entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (itBrokerAddrTable.hasNext() && (<span class="keyword">null</span> == brokerNameFound)) {</span><br><span class="line"> BrokerData brokerData = itBrokerAddrTable.next().getValue();</span><br><span class="line"></span><br><span class="line"> Iterator<Entry<Long, String>> it = brokerData.getBrokerAddrs().entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (it.hasNext()) {</span><br><span class="line"> Entry<Long, String> entry = it.next();</span><br><span class="line"> Long brokerId = entry.getKey();</span><br><span class="line"> String brokerAddr = entry.getValue();</span><br><span class="line"> <span class="keyword">if</span> (brokerAddr.equals(brokerAddrFound)) {</span><br><span class="line"> brokerNameFound = brokerData.getBrokerName();</span><br><span class="line"> it.remove();</span><br><span class="line"> log.info(<span class="string">"remove brokerAddr[{}, {}] from brokerAddrTable, because channel destroyed"</span>,</span><br><span class="line"> brokerId, brokerAddr);</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (brokerData.getBrokerAddrs().isEmpty()) {</span><br><span class="line"> removeBrokerName = <span class="keyword">true</span>;</span><br><span class="line"> itBrokerAddrTable.remove();</span><br><span class="line"> log.info(<span class="string">"remove brokerName[{}] from brokerAddrTable, because channel destroyed"</span>,</span><br><span class="line"> brokerData.getBrokerName());</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (brokerNameFound != <span class="keyword">null</span> && removeBrokerName) {</span><br><span class="line"> Iterator<Entry<String, Set<String>>> it = <span class="keyword">this</span>.clusterAddrTable.entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (it.hasNext()) {</span><br><span class="line"> Entry<String, Set<String>> entry = it.next();</span><br><span class="line"> String clusterName = entry.getKey();</span><br><span class="line"> Set<String> brokerNames = entry.getValue();</span><br><span class="line"> <span class="keyword">boolean</span> removed = brokerNames.remove(brokerNameFound);</span><br><span class="line"> <span class="keyword">if</span> (removed) {</span><br><span class="line"> log.info(<span class="string">"remove brokerName[{}], clusterName[{}] from clusterAddrTable, because channel destroyed"</span>,</span><br><span class="line"> brokerNameFound, clusterName);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (brokerNames.isEmpty()) {</span><br><span class="line"> log.info(<span class="string">"remove the clusterName[{}] from clusterAddrTable, because channel destroyed and no broker in this cluster"</span>,</span><br><span class="line"> clusterName);</span><br><span class="line"> it.remove();</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (removeBrokerName) {</span><br><span class="line"> Iterator<Entry<String, List<QueueData>>> itTopicQueueTable =</span><br><span class="line"> <span class="keyword">this</span>.topicQueueTable.entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (itTopicQueueTable.hasNext()) {</span><br><span class="line"> Entry<String, List<QueueData>> entry = itTopicQueueTable.next();</span><br><span class="line"> String topic = entry.getKey();</span><br><span class="line"> List<QueueData> queueDataList = entry.getValue();</span><br><span class="line"></span><br><span class="line"> Iterator<QueueData> itQueueData = queueDataList.iterator();</span><br><span class="line"> <span class="keyword">while</span> (itQueueData.hasNext()) {</span><br><span class="line"> QueueData queueData = itQueueData.next();</span><br><span class="line"> <span class="keyword">if</span> (queueData.getBrokerName().equals(brokerNameFound)) {</span><br><span class="line"> itQueueData.remove();</span><br><span class="line"> log.info(<span class="string">"remove topic[{} {}], from topicQueueTable, because channel destroyed"</span>,</span><br><span class="line"> topic, queueData);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (queueDataList.isEmpty()) {</span><br><span class="line"> itTopicQueueTable.remove();</span><br><span class="line"> log.info(<span class="string">"remove topic[{}] all queue, from topicQueueTable, because channel destroyed"</span>,</span><br><span class="line"> topic);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">finally</span> {</span><br><span class="line"> <span class="keyword">this</span>.lock.writeLock().unlock();</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">catch</span> (Exception e) {</span><br><span class="line"> log.error(<span class="string">"onChannelDestroy Exception"</span>, e);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>第二个是每10分钟打印一次NameServer的配置参数。即KVConfigManager.configTable变量的内容。</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">this</span>.scheduledExecutorService.scheduleAtFixedRate(<span class="keyword">new</span> Runnable() {</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">run</span><span class="params">()</span> </span>{</span><br><span class="line"> NamesrvController.<span class="keyword">this</span>.kvConfigManager.printAllPeriodically();</span><br><span class="line"> }</span><br><span class="line"> }, <span class="number">1</span>, <span class="number">10</span>, TimeUnit.MINUTES);</span><br></pre></td></tr></table></figure>
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<p>然后这个初始化就差不多完成了，后面只需要把remotingServer start一下就好了</p>
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<h3 id="处理请求"><a href="#处理请求" class="headerlink" title="处理请求"></a>处理请求</h3><p>直接上代码，其实主体是swtich case去判断</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Override</span></span><br><span class="line"> <span class="function"><span class="keyword">public</span> RemotingCommand <span class="title">processRequest</span><span class="params">(ChannelHandlerContext ctx,</span></span></span><br><span class="line"><span class="function"><span class="params"> RemotingCommand request)</span> <span class="keyword">throws</span> RemotingCommandException </span>{</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (ctx != <span class="keyword">null</span>) {</span><br><span class="line"> log.debug(<span class="string">"receive request, {} {} {}"</span>,</span><br><span class="line"> request.getCode(),</span><br><span class="line"> RemotingHelper.parseChannelRemoteAddr(ctx.channel()),</span><br><span class="line"> request);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"> <span class="keyword">switch</span> (request.getCode()) {</span><br><span class="line"> <span class="keyword">case</span> RequestCode.PUT_KV_CONFIG:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.putKVConfig(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_KV_CONFIG:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getKVConfig(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.DELETE_KV_CONFIG:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.deleteKVConfig(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.QUERY_DATA_VERSION:</span><br><span class="line"> <span class="keyword">return</span> queryBrokerTopicConfig(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.REGISTER_BROKER:</span><br><span class="line"> Version brokerVersion = MQVersion.value2Version(request.getVersion());</span><br><span class="line"> <span class="keyword">if</span> (brokerVersion.ordinal() >= MQVersion.Version.V3_0_11.ordinal()) {</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.registerBrokerWithFilterServer(ctx, request);</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.registerBroker(ctx, request);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">case</span> RequestCode.UNREGISTER_BROKER:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.unregisterBroker(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_ROUTEINTO_BY_TOPIC:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getRouteInfoByTopic(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_BROKER_CLUSTER_INFO:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getBrokerClusterInfo(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.WIPE_WRITE_PERM_OF_BROKER:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.wipeWritePermOfBroker(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_ALL_TOPIC_LIST_FROM_NAMESERVER:</span><br><span class="line"> <span class="keyword">return</span> getAllTopicListFromNameserver(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.DELETE_TOPIC_IN_NAMESRV:</span><br><span class="line"> <span class="keyword">return</span> deleteTopicInNamesrv(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_KVLIST_BY_NAMESPACE:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getKVListByNamespace(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_TOPICS_BY_CLUSTER:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getTopicsByCluster(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_SYSTEM_TOPIC_LIST_FROM_NS:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getSystemTopicListFromNs(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_UNIT_TOPIC_LIST:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getUnitTopicList(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_HAS_UNIT_SUB_TOPIC_LIST:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getHasUnitSubTopicList(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_HAS_UNIT_SUB_UNUNIT_TOPIC_LIST:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getHasUnitSubUnUnitTopicList(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.UPDATE_NAMESRV_CONFIG:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.updateConfig(ctx, request);</span><br><span class="line"> <span class="keyword">case</span> RequestCode.GET_NAMESRV_CONFIG:</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.getConfig(ctx, request);</span><br><span class="line"> <span class="keyword">default</span>:</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">null</span>;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>以broker注册为例，</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">case</span> RequestCode.REGISTER_BROKER:</span><br><span class="line"> Version brokerVersion = MQVersion.value2Version(request.getVersion());</span><br><span class="line"> <span class="keyword">if</span> (brokerVersion.ordinal() >= MQVersion.Version.V3_0_11.ordinal()) {</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.registerBrokerWithFilterServer(ctx, request);</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">this</span>.registerBroker(ctx, request);</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>做了个简单的版本管理，我们看下前面一个的代码</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> RemotingCommand <span class="title">registerBrokerWithFilterServer</span><span class="params">(ChannelHandlerContext ctx, RemotingCommand request)</span></span></span><br><span class="line"><span class="function"> <span class="keyword">throws</span> RemotingCommandException </span>{</span><br><span class="line"> <span class="keyword">final</span> RemotingCommand response = RemotingCommand.createResponseCommand(RegisterBrokerResponseHeader<span class="class">.<span class="keyword">class</span>)</span>;</span><br><span class="line"> <span class="keyword">final</span> RegisterBrokerResponseHeader responseHeader = (RegisterBrokerResponseHeader) response.readCustomHeader();</span><br><span class="line"> <span class="keyword">final</span> RegisterBrokerRequestHeader requestHeader =</span><br><span class="line"> (RegisterBrokerRequestHeader) request.decodeCommandCustomHeader(RegisterBrokerRequestHeader<span class="class">.<span class="keyword">class</span>)</span>;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (!checksum(ctx, request, requestHeader)) {</span><br><span class="line"> response.setCode(ResponseCode.SYSTEM_ERROR);</span><br><span class="line"> response.setRemark(<span class="string">"crc32 not match"</span>);</span><br><span class="line"> <span class="keyword">return</span> response;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> RegisterBrokerBody registerBrokerBody = <span class="keyword">new</span> RegisterBrokerBody();</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (request.getBody() != <span class="keyword">null</span>) {</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> registerBrokerBody = RegisterBrokerBody.decode(request.getBody(), requestHeader.isCompressed());</span><br><span class="line"> } <span class="keyword">catch</span> (Exception e) {</span><br><span class="line"> <span class="keyword">throw</span> <span class="keyword">new</span> RemotingCommandException(<span class="string">"Failed to decode RegisterBrokerBody"</span>, e);</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> registerBrokerBody.getTopicConfigSerializeWrapper().getDataVersion().setCounter(<span class="keyword">new</span> AtomicLong(<span class="number">0</span>));</span><br><span class="line"> registerBrokerBody.getTopicConfigSerializeWrapper().getDataVersion().setTimestamp(<span class="number">0</span>);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> RegisterBrokerResult result = <span class="keyword">this</span>.namesrvController.getRouteInfoManager().registerBroker(</span><br><span class="line"> requestHeader.getClusterName(),</span><br><span class="line"> requestHeader.getBrokerAddr(),</span><br><span class="line"> requestHeader.getBrokerName(),</span><br><span class="line"> requestHeader.getBrokerId(),</span><br><span class="line"> requestHeader.getHaServerAddr(),</span><br><span class="line"> registerBrokerBody.getTopicConfigSerializeWrapper(),</span><br><span class="line"> registerBrokerBody.getFilterServerList(),</span><br><span class="line"> ctx.channel());</span><br><span class="line"></span><br><span class="line"> responseHeader.setHaServerAddr(result.getHaServerAddr());</span><br><span class="line"> responseHeader.setMasterAddr(result.getMasterAddr());</span><br><span class="line"></span><br><span class="line"> <span class="keyword">byte</span>[] jsonValue = <span class="keyword">this</span>.namesrvController.getKvConfigManager().getKVListByNamespace(NamesrvUtil.NAMESPACE_ORDER_TOPIC_CONFIG);</span><br><span class="line"> response.setBody(jsonValue);</span><br><span class="line"></span><br><span class="line"> response.setCode(ResponseCode.SUCCESS);</span><br><span class="line"> response.setRemark(<span class="keyword">null</span>);</span><br><span class="line"> <span class="keyword">return</span> response;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>可以看到主要的逻辑还是在<code>org.apache.rocketmq.namesrv.routeinfo.RouteInfoManager#registerBroker</code>这个方法里</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> RegisterBrokerResult <span class="title">registerBroker</span><span class="params">(</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> String clusterName,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> String brokerAddr,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> String brokerName,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> <span class="keyword">long</span> brokerId,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> String haServerAddr,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> TopicConfigSerializeWrapper topicConfigWrapper,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> List<String> filterServerList,</span></span></span><br><span class="line"><span class="function"><span class="params"> <span class="keyword">final</span> Channel channel)</span> </span>{</span><br><span class="line"> RegisterBrokerResult result = <span class="keyword">new</span> RegisterBrokerResult();</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">try</span> {</span><br><span class="line"> <span class="keyword">this</span>.lock.writeLock().lockInterruptibly();</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 更新这个clusterAddrTable</span></span><br><span class="line"> Set<String> brokerNames = <span class="keyword">this</span>.clusterAddrTable.get(clusterName);</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == brokerNames) {</span><br><span class="line"> brokerNames = <span class="keyword">new</span> HashSet<String>();</span><br><span class="line"> <span class="keyword">this</span>.clusterAddrTable.put(clusterName, brokerNames);</span><br><span class="line"> }</span><br><span class="line"> brokerNames.add(brokerName);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">boolean</span> registerFirst = <span class="keyword">false</span>;</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 更新brokerAddrTable</span></span><br><span class="line"> BrokerData brokerData = <span class="keyword">this</span>.brokerAddrTable.get(brokerName);</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == brokerData) {</span><br><span class="line"> registerFirst = <span class="keyword">true</span>;</span><br><span class="line"> brokerData = <span class="keyword">new</span> BrokerData(clusterName, brokerName, <span class="keyword">new</span> HashMap<Long, String>());</span><br><span class="line"> <span class="keyword">this</span>.brokerAddrTable.put(brokerName, brokerData);</span><br><span class="line"> }</span><br><span class="line"> Map<Long, String> brokerAddrsMap = brokerData.getBrokerAddrs();</span><br><span class="line"> <span class="comment">//Switch slave to master: first remove <1, IP:PORT> in namesrv, then add <0, IP:PORT></span></span><br><span class="line"> <span class="comment">//The same IP:PORT must only have one record in brokerAddrTable</span></span><br><span class="line"> Iterator<Entry<Long, String>> it = brokerAddrsMap.entrySet().iterator();</span><br><span class="line"> <span class="keyword">while</span> (it.hasNext()) {</span><br><span class="line"> Entry<Long, String> item = it.next();</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> != brokerAddr && brokerAddr.equals(item.getValue()) && brokerId != item.getKey()) {</span><br><span class="line"> it.remove();</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> String oldAddr = brokerData.getBrokerAddrs().put(brokerId, brokerAddr);</span><br><span class="line"> registerFirst = registerFirst || (<span class="keyword">null</span> == oldAddr);</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 更新了org.apache.rocketmq.namesrv.routeinfo.RouteInfoManager#topicQueueTable中的数据</span></span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> != topicConfigWrapper</span><br><span class="line"> && MixAll.MASTER_ID == brokerId) {</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">this</span>.isBrokerTopicConfigChanged(brokerAddr, topicConfigWrapper.getDataVersion())</span><br><span class="line"> || registerFirst) {</span><br><span class="line"> ConcurrentMap<String, TopicConfig> tcTable =</span><br><span class="line"> topicConfigWrapper.getTopicConfigTable();</span><br><span class="line"> <span class="keyword">if</span> (tcTable != <span class="keyword">null</span>) {</span><br><span class="line"> <span class="keyword">for</span> (Map.Entry<String, TopicConfig> entry : tcTable.entrySet()) {</span><br><span class="line"> <span class="keyword">this</span>.createAndUpdateQueueData(brokerName, entry.getValue());</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 更新活跃broker信息</span></span><br><span class="line"> BrokerLiveInfo prevBrokerLiveInfo = <span class="keyword">this</span>.brokerLiveTable.put(brokerAddr,</span><br><span class="line"> <span class="keyword">new</span> BrokerLiveInfo(</span><br><span class="line"> System.currentTimeMillis(),</span><br><span class="line"> topicConfigWrapper.getDataVersion(),</span><br><span class="line"> channel,</span><br><span class="line"> haServerAddr));</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">null</span> == prevBrokerLiveInfo) {</span><br><span class="line"> log.info(<span class="string">"new broker registered, {} HAServer: {}"</span>, brokerAddr, haServerAddr);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 处理filter</span></span><br><span class="line"> <span class="keyword">if</span> (filterServerList != <span class="keyword">null</span>) {</span><br><span class="line"> <span class="keyword">if</span> (filterServerList.isEmpty()) {</span><br><span class="line"> <span class="keyword">this</span>.filterServerTable.remove(brokerAddr);</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">this</span>.filterServerTable.put(brokerAddr, filterServerList);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 当当前broker非master时返回master信息</span></span><br><span class="line"> <span class="keyword">if</span> (MixAll.MASTER_ID != brokerId) {</span><br><span class="line"> String masterAddr = brokerData.getBrokerAddrs().get(MixAll.MASTER_ID);</span><br><span class="line"> <span class="keyword">if</span> (masterAddr != <span class="keyword">null</span>) {</span><br><span class="line"> BrokerLiveInfo brokerLiveInfo = <span class="keyword">this</span>.brokerLiveTable.get(masterAddr);</span><br><span class="line"> <span class="keyword">if</span> (brokerLiveInfo != <span class="keyword">null</span>) {</span><br><span class="line"> result.setHaServerAddr(brokerLiveInfo.getHaServerAddr());</span><br><span class="line"> result.setMasterAddr(masterAddr);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">finally</span> {</span><br><span class="line"> <span class="keyword">this</span>.lock.writeLock().unlock();</span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">catch</span> (Exception e) {</span><br><span class="line"> log.error(<span class="string">"registerBroker Exception"</span>, e);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> result;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>这个是注册 broker 的逻辑，再看下根据 topic 获取 broker 信息和 topic 信息，<code>org.apache.rocketmq.namesrv.processor.DefaultRequestProcessor#getRouteInfoByTopic</code> 主要是这个方法的逻辑</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">public</span> RemotingCommand <span class="title">getRouteInfoByTopic</span><span class="params">(ChannelHandlerContext ctx,</span></span></span><br><span class="line"><span class="function"><span class="params"> RemotingCommand request)</span> <span class="keyword">throws</span> RemotingCommandException </span>{</span><br><span class="line"> <span class="keyword">final</span> RemotingCommand response = RemotingCommand.createResponseCommand(<span class="keyword">null</span>);</span><br><span class="line"> <span class="keyword">final</span> GetRouteInfoRequestHeader requestHeader =</span><br><span class="line"> (GetRouteInfoRequestHeader) request.decodeCommandCustomHeader(GetRouteInfoRequestHeader<span class="class">.<span class="keyword">class</span>)</span>;</span><br><span class="line"></span><br><span class="line"> TopicRouteData topicRouteData = <span class="keyword">this</span>.namesrvController.getRouteInfoManager().pickupTopicRouteData(requestHeader.getTopic());</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (topicRouteData != <span class="keyword">null</span>) {</span><br><span class="line"> <span class="keyword">if</span> (<span class="keyword">this</span>.namesrvController.getNamesrvConfig().isOrderMessageEnable()) {</span><br><span class="line"> String orderTopicConf =</span><br><span class="line"> <span class="keyword">this</span>.namesrvController.getKvConfigManager().getKVConfig(NamesrvUtil.NAMESPACE_ORDER_TOPIC_CONFIG,</span><br><span class="line"> requestHeader.getTopic());</span><br><span class="line"> topicRouteData.setOrderTopicConf(orderTopicConf);</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">byte</span>[] content = topicRouteData.encode();</span><br><span class="line"> response.setBody(content);</span><br><span class="line"> response.setCode(ResponseCode.SUCCESS);</span><br><span class="line"> response.setRemark(<span class="keyword">null</span>);</span><br><span class="line"> <span class="keyword">return</span> response;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> response.setCode(ResponseCode.TOPIC_NOT_EXIST);</span><br><span class="line"> response.setRemark(<span class="string">"No topic route info in name server for the topic: "</span> + requestHeader.getTopic()</span><br><span class="line"> + FAQUrl.suggestTodo(FAQUrl.APPLY_TOPIC_URL));</span><br><span class="line"> <span class="keyword">return</span> response;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p>首先调用<code>org.apache.rocketmq.namesrv.routeinfo.RouteInfoManager#pickupTopicRouteData</code>从<code>org.apache.rocketmq.namesrv.routeinfo.RouteInfoManager#topicQueueTable</code>获取到<code>org.apache.rocketmq.common.protocol.route.QueueData</code>这里面存了 brokerName，再通过<code>org.apache.rocketmq.namesrv.routeinfo.RouteInfoManager#brokerAddrTable</code>里获取到 broker 的地址信息等，然后再获取 orderMessage 的配置。</p>
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<p>简要分析了下 RocketMQ 的 NameServer 的代码，比较粗粒度。</p>
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leancloudSelector(url).innerText = 'Counter not initialized! More info at console err msg.';
|
|
console.error('ATTENTION! LeanCloud counter has security bug, see how to solve it here: https://github.com/theme-next/hexo-leancloud-counter-security. \n However, you can still use LeanCloud without security, by setting `security` option to `false`.');
|
|
|
|
}
|
|
})
|
|
.catch(error => {
|
|
console.error('LeanCloud Counter Error', error);
|
|
});
|
|
}
|
|
|
|
function showTime(Counter) {
|
|
var visitors = document.querySelectorAll('.leancloud_visitors');
|
|
var entries = [...visitors].map(element => {
|
|
return decodeURI(element.id);
|
|
});
|
|
|
|
Counter('get', '/classes/Counter?where=' + encodeURIComponent(JSON.stringify({ url: { '$in': entries } })))
|
|
.then(response => response.json())
|
|
.then(({ results }) => {
|
|
for (let url of entries) {
|
|
let target = results.find(item => item.url === url);
|
|
leancloudSelector(url).innerText = target ? target.time : 0;
|
|
}
|
|
})
|
|
.catch(error => {
|
|
console.error('LeanCloud Counter Error', error);
|
|
});
|
|
}
|
|
|
|
let { app_id, app_key, server_url } = {"enable":true,"app_id":"ysza182Vghlqjdt7QiwGLLJy-gzGzoHsz","app_key":"s9GDqbn7gnGGkusf66YRVccw","server_url":"https://leancloud.cn","security":true};
|
|
function fetchData(api_server) {
|
|
var Counter = (method, url, data) => {
|
|
return fetch(`${api_server}/1.1${url}`, {
|
|
method,
|
|
headers: {
|
|
'X-LC-Id' : app_id,
|
|
'X-LC-Key' : app_key,
|
|
'Content-Type': 'application/json',
|
|
},
|
|
body: JSON.stringify(data)
|
|
});
|
|
};
|
|
if (CONFIG.page.isPost) {
|
|
if (CONFIG.hostname !== location.hostname) return;
|
|
addCount(Counter);
|
|
} else if (document.querySelectorAll('.post-title-link').length >= 1) {
|
|
showTime(Counter);
|
|
}
|
|
}
|
|
|
|
let api_server = app_id.slice(-9) !== '-MdYXbMMI' ? server_url : `https://${app_id.slice(0, 8).toLowerCase()}.api.lncldglobal.com`;
|
|
|
|
if (api_server) {
|
|
fetchData(api_server);
|
|
} else {
|
|
fetch('https://app-router.leancloud.cn/2/route?appId=' + app_id)
|
|
.then(response => response.json())
|
|
.then(({ api_server }) => {
|
|
fetchData('https://' + api_server);
|
|
});
|
|
}
|
|
})();
|
|
</script>
|
|
|
|
|
|
</div>
|
|
</footer>
|
|
</div>
|
|
|
|
|
|
<script src="/lib/anime.min.js"></script>
|
|
<script src="//cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js"></script>
|
|
<script src="//cdn.jsdelivr.net/gh/fancyapps/fancybox@3/dist/jquery.fancybox.min.js"></script>
|
|
<script src="//cdn.jsdelivr.net/npm/lozad@1/dist/lozad.min.js"></script>
|
|
<script src="/lib/velocity/velocity.min.js"></script>
|
|
<script src="/lib/velocity/velocity.ui.min.js"></script>
|
|
|
|
<script src="/js/utils.js"></script>
|
|
|
|
<script src="/js/motion.js"></script>
|
|
|
|
|
|
<script src="/js/schemes/pisces.js"></script>
|
|
|
|
|
|
<script src="/js/next-boot.js"></script>
|
|
|
|
|
|
|
|
|
|
|
|
<script>
|
|
(function(){
|
|
var canonicalURL, curProtocol;
|
|
//Get the <link> tag
|
|
var x=document.getElementsByTagName("link");
|
|
//Find the last canonical URL
|
|
if(x.length > 0){
|
|
for (i=0;i<x.length;i++){
|
|
if(x[i].rel.toLowerCase() == 'canonical' && x[i].href){
|
|
canonicalURL=x[i].href;
|
|
}
|
|
}
|
|
}
|
|
//Get protocol
|
|
if (!canonicalURL){
|
|
curProtocol = window.location.protocol.split(':')[0];
|
|
}
|
|
else{
|
|
curProtocol = canonicalURL.split(':')[0];
|
|
}
|
|
//Get current URL if the canonical URL does not exist
|
|
if (!canonicalURL) canonicalURL = window.location.href;
|
|
//Assign script content. Replace current URL with the canonical URL
|
|
!function(){var e=/([http|https]:\/\/[a-zA-Z0-9\_\.]+\.baidu\.com)/gi,r=canonicalURL,t=document.referrer;if(!e.test(r)){var n=(String(curProtocol).toLowerCase() === 'https')?"https://sp0.baidu.com/9_Q4simg2RQJ8t7jm9iCKT-xh_/s.gif":"//api.share.baidu.com/s.gif";t?(n+="?r="+encodeURIComponent(document.referrer),r&&(n+="&l="+r)):r&&(n+="?l="+r);var i=new Image;i.src=n}}(window);})();
|
|
</script>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<script src="//cdn.jsdelivr.net/npm/quicklink@1/dist/quicklink.umd.js"></script>
|
|
<script>
|
|
window.addEventListener('load', () => {
|
|
quicklink({
|
|
timeout : 3000,
|
|
priority: true,
|
|
ignores : [uri => uri.includes('#'),uri => uri === 'https://nicksxs.me/2020/07/05/%E8%81%8A%E4%B8%80%E4%B8%8B-RocketMQ-%E7%9A%84-NameServer-%E6%BA%90%E7%A0%81/',]
|
|
});
|
|
});
|
|
</script>
|
|
|
|
<script>
|
|
function loadCount() {
|
|
var d = document, s = d.createElement('script');
|
|
s.src = 'https://nicksxs.disqus.com/count.js';
|
|
s.id = 'dsq-count-scr';
|
|
(d.head || d.body).appendChild(s);
|
|
}
|
|
// defer loading until the whole page loading is completed
|
|
window.addEventListener('load', loadCount, false);
|
|
</script>
|
|
<script>
|
|
var disqus_config = function() {
|
|
this.page.url = "https://nicksxs.me/2020/07/05/%E8%81%8A%E4%B8%80%E4%B8%8B-RocketMQ-%E7%9A%84-NameServer-%E6%BA%90%E7%A0%81/";
|
|
this.page.identifier = "2020/07/05/聊一下-RocketMQ-的-NameServer-源码/";
|
|
this.page.title = "聊一下 RocketMQ 的 NameServer 源码";
|
|
};
|
|
NexT.utils.loadComments(document.querySelector('#disqus_thread'), () => {
|
|
if (window.DISQUS) {
|
|
DISQUS.reset({
|
|
reload: true,
|
|
config: disqus_config
|
|
});
|
|
} else {
|
|
var d = document, s = d.createElement('script');
|
|
s.src = 'https://nicksxs.disqus.com/embed.js';
|
|
s.setAttribute('data-timestamp', '' + +new Date());
|
|
(d.head || d.body).appendChild(s);
|
|
}
|
|
});
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|