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class="tag-list-link" href="/tags/Shift-2D-Grid/" rel="tag">Shift 2D Grid</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Singleton/" rel="tag">Singleton</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Spring/" rel="tag">Spring</a><span class="tag-list-count">6</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Spring-Event/" rel="tag">Spring Event</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/SpringBoot/" rel="tag">SpringBoot</a><span class="tag-list-count">4</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Sql%E6%B3%A8%E5%85%A5/" rel="tag">Sql注入</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Stream/" rel="tag">Stream</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Synchronized/" rel="tag">Synchronized</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Thread-dump/" rel="tag">Thread dump</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/ThreadLocal/" rel="tag">ThreadLocal</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/ThreadPool/" rel="tag">ThreadPool</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Tomcat/" rel="tag">Tomcat</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Trapping-Rain-Water/" rel="tag">Trapping Rain Water</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/WeakReference/" rel="tag">WeakReference</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Web/" rel="tag">Web</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Webhook/" rel="tag">Webhook</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/WordPress/" rel="tag">WordPress</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/aqs/" rel="tag">aqs</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/await/" rel="tag">await</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/bloom-filter/" rel="tag">bloom filter</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/c/" rel="tag">c++</a><span class="tag-list-count">14</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/cglib/" rel="tag">cglib</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/cgroup/" rel="tag">cgroup</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/cluster/" rel="tag">cluster</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/condition/" rel="tag">condition</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/docker/" rel="tag">docker</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/dp/" rel="tag">dp</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/dubbo/" rel="tag">dubbo</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/echo/" rel="tag">echo</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/environment/" rel="tag">environment</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/gap-lock/" rel="tag">gap lock</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/gc/" rel="tag">gc</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/git/" rel="tag">git</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/grep/" rel="tag">grep</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/hadoop/" rel="tag">hadoop</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/icu4c/" rel="tag">icu4c</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/im/" rel="tag">im</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/is-not-null/" rel="tag">is not null</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/is-null/" rel="tag">is null</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/j-u-c/" rel="tag">j.u.c</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/java/" rel="tag">java</a><span class="tag-list-count">33</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/jvm/" rel="tag">jvm</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/leetcode/" rel="tag">leetcode</a><span class="tag-list-count">40</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/leetcode-155/" rel="tag">leetcode 155</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/linked-list/" rel="tag">linked list</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/linux/" rel="tag">linux</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/lock/" rel="tag">lock</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/mfc/" rel="tag">mfc</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/min-stack/" rel="tag">min stack</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/mq/" rel="tag">mq</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/mvcc/" rel="tag">mvcc</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/mysql/" rel="tag">mysql</a><span class="tag-list-count">6</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/namespace/" rel="tag">namespace</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/next-key-lock/" rel="tag">next-key lock</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/nginx/" rel="tag">nginx</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/nullsfirst/" rel="tag">nullsfirst</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/openresty/" rel="tag">openresty</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/php/" rel="tag">php</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/procedure/" rel="tag">procedure</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/python/" rel="tag">python</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/read-view/" rel="tag">read view</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/redis/" rel="tag">redis</a><span class="tag-list-count">11</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/scp/" rel="tag">scp</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/signal/" rel="tag">signal</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/sort/" rel="tag">sort</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/spark/" rel="tag">spark</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/ssh/" rel="tag">ssh</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/stack/" rel="tag">stack</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/stream/" rel="tag">stream</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/string/" rel="tag">string</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/swoole/" rel="tag">swoole</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/top/" rel="tag">top</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/uname/" rel="tag">uname</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/unlock/" rel="tag">unlock</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/utf8/" rel="tag">utf8</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/utf8mb4/" rel="tag">utf8mb4</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/utf8mb4-0900-ai-ci/" rel="tag">utf8mb4_0900_ai_ci</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/utf8mb4-general-ci/" rel="tag">utf8mb4_general_ci</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/utf8mb4-unicode-ci/" rel="tag">utf8mb4_unicode_ci</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/value/" rel="tag">value</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/websocket/" rel="tag">websocket</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/zookeeper/" rel="tag">zookeeper</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/zsh/" rel="tag">zsh</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%89%E9%98%B6%E6%AE%B5%E6%8F%90%E4%BA%A4/" rel="tag">三阶段提交</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%8D%E5%8F%AF%E5%8F%98%E5%BC%95%E7%94%A8/" rel="tag">不可变引用</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%9C%E4%BA%AC%E5%A5%A5%E8%BF%90%E4%BC%9A/" rel="tag">东京奥运会</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%A4%E9%98%B6%E6%AE%B5%E6%8F%90%E4%BA%A4/" rel="tag">两阶段提交</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%AD%E5%B1%B1%E8%B7%AF/" rel="tag">中山路</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%AD%E5%BA%8F/" rel="tag">中序</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%AD%E9%97%B4%E4%BB%B6/" rel="tag">中间件</a><span class="tag-list-count">4</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B8%BE%E9%87%8D/" rel="tag">举重</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%B9%92%E4%B9%93%E7%90%83/" rel="tag">乒乓球</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%BA%8B%E5%8A%A1/" rel="tag">事务</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%BA%8C%E5%8F%89%E6%A0%91/" rel="tag">二叉树</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%BA%92%E6%96%A5%E9%94%81/" rel="tag">互斥锁</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%BB%A3%E7%A0%81%E9%A2%98%E8%A7%A3/" rel="tag">代码题解</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E4%BF%AE%E7%94%B5%E8%84%91%E7%9A%84/" rel="tag">修电脑的</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%81%8F%E5%90%91%E9%94%81/" rel="tag">偏向锁</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%81%A5%E5%BA%B7%E7%A0%81/" rel="tag">健康码</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%85%AC%E4%BA%A4/" rel="tag">公交</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%85%AC%E4%BA%A4%E8%BD%A6/" rel="tag">公交车</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%86%85%E5%AD%98%E5%88%86%E5%B8%83/" rel="tag">内存分布</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%86%85%E5%AD%98%E6%B3%84%E6%BC%8F/" rel="tag">内存泄漏</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%87%86%E5%A4%87/" rel="tag">准备</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%87%8F%E8%82%A5/" rel="tag">减肥</a><span class="tag-list-count">6</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/" rel="tag">分布式事务</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%88%86%E5%B8%83%E5%BC%8F%E9%94%81/" rel="tag">分布式锁</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%88%87%E7%89%87/" rel="tag">切片</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%88%9D%E5%A7%8B%E5%8C%96/" rel="tag">初始化</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%89%8A%E5%B3%B0%E5%A1%AB%E8%B0%B7/" rel="tag">削峰填谷</a><span class="tag-list-count">4</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%89%8D%E5%BA%8F/" rel="tag">前序</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8A%A0%E5%A1%9E/" rel="tag">加塞</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8A%A0%E8%BD%BD/" rel="tag">加载</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8D%95%E4%BE%8B/" rel="tag">单例</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8D%9A%E5%AE%A2%EF%BC%8C%E6%96%87%E7%AB%A0/" rel="tag">博客，文章</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8E%A6%E9%97%A8/" rel="tag">厦门</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8F%8C%E4%BA%B2%E5%A7%94%E6%B4%BE/" rel="tag">双亲委派</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8F%91%E8%A1%8C%E7%89%88/" rel="tag">发行版</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8F%A3%E7%BD%A9/" rel="tag">口罩</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%8F%AF%E5%8F%98%E5%BC%95%E7%94%A8/" rel="tag">可变引用</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%90%90%E6%A7%BD/" rel="tag">吐槽</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%9B%A4%E7%89%A9%E8%B5%84/" rel="tag">囤物资</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6/" rel="tag">垃圾回收</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%9F%BA%E7%A1%80%E8%AE%BE%E6%96%BD/" rel="tag">基础设施</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%A4%A7%E6%89%AB%E9%99%A4/" rel="tag">大扫除</a><span 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href="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/"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/uploads/avatar.jpg"><meta itemprop="name" content="Nicksxs"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="Nicksxs's Blog"><meta itemprop="description" content="learn from zero,技术博客，Nicksxs，史学森"></span><span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork"><meta itemprop="name" content="聊一下 RocketMQ 的 NameServer 源码 | Nicksxs's Blog"><meta itemprop="description" content=""></span><header class="post-header"><h1 class="post-title" itemprop="name headline">聊一下 RocketMQ 的 NameServer 源码</h1><div class="post-meta-container"><div class="post-meta"><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-calendar"></i> </span><span class="post-meta-item-text">发表于</span> <time title="创建时间：2020-07-05 21:01:47" itemprop="dateCreated datePublished" datetime="2020-07-05T21:01:47+08:00">2020-07-05</time> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-calendar-check"></i> </span><span class="post-meta-item-text">更新于</span> <time title="修改时间：2022-04-02 16:00:01" itemprop="dateModified" datetime="2022-04-02T16:00:01+08:00">2022-04-02</time> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-folder"></i> </span><span class="post-meta-item-text">分类于</span> <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/MQ/" itemprop="url" rel="index"><span itemprop="name">MQ</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/MQ/RocketMQ/" itemprop="url" rel="index"><span itemprop="name">RocketMQ</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/" itemprop="url" rel="index"><span itemprop="name">消息队列</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/RocketMQ/" itemprop="url" rel="index"><span itemprop="name">RocketMQ</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/%E4%B8%AD%E9%97%B4%E4%BB%B6/" itemprop="url" rel="index"><span itemprop="name">中间件</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/%E4%B8%AD%E9%97%B4%E4%BB%B6/RocketMQ/" itemprop="url" rel="index"><span itemprop="name">RocketMQ</span></a> </span></span><span id="/2020/07/05/%E8%81%8A%E4%B8%80%E4%B8%8B-RocketMQ-%E7%9A%84-NameServer-%E6%BA%90%E7%A0%81/" class="post-meta-item leancloud_visitors" data-flag-title="聊一下 RocketMQ 的 NameServer 源码" title="阅读次数"><span 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itemprop="articleBody"><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><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token function">main0</span><span class="token punctuation">(</span>args<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">NamesrvController</span> <span class="token function">main0</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">NamesrvController</span> controller <span class="token operator">=</span> <span class="token function">createNamesrvController</span><span class="token punctuation">(</span>args<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">start</span><span class="token punctuation">(</span>controller<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> tip <span class="token operator">=</span> <span class="token string">"The Name Server boot success. serializeType="</span> <span class="token operator">+</span> <span class="token class-name">RemotingCommand</span><span class="token punctuation">.</span><span class="token function">getSerializeTypeConfigInThisServer</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span>tip<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"%s%n"</span><span class="token punctuation">,</span> tip<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> controller<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Throwable</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">exit</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">NamesrvController</span> <span class="token function">createNamesrvController</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">IOException</span><span class="token punctuation">,</span> <span class="token class-name">JoranException</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">setProperty</span><span class="token punctuation">(</span><span class="token class-name">RemotingCommand</span><span class="token punctuation">.</span><span class="token constant">REMOTING_VERSION_KEY</span><span class="token punctuation">,</span> <span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token function">toString</span><span class="token punctuation">(</span><span class="token class-name">MQVersion</span><span class="token punctuation">.</span><span class="token constant">CURRENT_VERSION</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//PackageConflictDetect.detectFastjson();</span>
<span class="token class-name">Options</span> options <span class="token operator">=</span> <span class="token class-name">ServerUtil</span><span class="token punctuation">.</span><span class="token function">buildCommandlineOptions</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Options</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
commandLine <span class="token operator">=</span> <span class="token class-name">ServerUtil</span><span class="token punctuation">.</span><span class="token function">parseCmdLine</span><span class="token punctuation">(</span><span class="token string">"mqnamesrv"</span><span class="token punctuation">,</span> args<span class="token punctuation">,</span> <span class="token function">buildCommandlineOptions</span><span class="token punctuation">(</span>options<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">PosixParser</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> commandLine<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">exit</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">final</span> <span class="token class-name">NamesrvConfig</span> namesrvConfig <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">NamesrvConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">final</span> <span class="token class-name">NettyServerConfig</span> nettyServerConfig <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">NettyServerConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
nettyServerConfig<span class="token punctuation">.</span><span class="token function">setListenPort</span><span class="token punctuation">(</span><span class="token number">9876</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>commandLine<span class="token punctuation">.</span><span class="token function">hasOption</span><span class="token punctuation">(</span><span class="token char">'c'</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> file <span class="token operator">=</span> commandLine<span class="token punctuation">.</span><span class="token function">getOptionValue</span><span class="token punctuation">(</span><span class="token char">'c'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>file <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">InputStream</span> in <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">BufferedInputStream</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">FileInputStream</span><span class="token punctuation">(</span>file<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
properties <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Properties</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
properties<span class="token punctuation">.</span><span class="token function">load</span><span class="token punctuation">(</span>in<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">properties2Object</span><span class="token punctuation">(</span>properties<span class="token punctuation">,</span> namesrvConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">properties2Object</span><span class="token punctuation">(</span>properties<span class="token punctuation">,</span> nettyServerConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
namesrvConfig<span class="token punctuation">.</span><span class="token function">setConfigStorePath</span><span class="token punctuation">(</span>file<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"load config properties file OK, %s%n"</span><span class="token punctuation">,</span> file<span class="token punctuation">)</span><span class="token punctuation">;</span>
in<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>commandLine<span class="token punctuation">.</span><span class="token function">hasOption</span><span class="token punctuation">(</span><span class="token char">'p'</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">InternalLogger</span> console <span class="token operator">=</span> <span class="token class-name">InternalLoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">LoggerName</span><span class="token punctuation">.</span><span class="token constant">NAMESRV_CONSOLE_NAME</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">printObjectProperties</span><span class="token punctuation">(</span>console<span class="token punctuation">,</span> namesrvConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">printObjectProperties</span><span class="token punctuation">(</span>console<span class="token punctuation">,</span> nettyServerConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">exit</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">properties2Object</span><span class="token punctuation">(</span><span class="token class-name">ServerUtil</span><span class="token punctuation">.</span><span class="token function">commandLine2Properties</span><span class="token punctuation">(</span>commandLine<span class="token punctuation">)</span><span class="token punctuation">,</span> namesrvConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> namesrvConfig<span class="token punctuation">.</span><span class="token function">getRocketmqHome</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">printf</span><span class="token punctuation">(</span><span class="token string">"Please set the %s variable in your environment to match the location of the RocketMQ installation%n"</span><span class="token punctuation">,</span> <span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token constant">ROCKETMQ_HOME_ENV</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">exit</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">LoggerContext</span> lc <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">LoggerContext</span><span class="token punctuation">)</span> <span class="token class-name">LoggerFactory</span><span class="token punctuation">.</span><span class="token function">getILoggerFactory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">JoranConfigurator</span> configurator <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">JoranConfigurator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
configurator<span class="token punctuation">.</span><span class="token function">setContext</span><span class="token punctuation">(</span>lc<span class="token punctuation">)</span><span class="token punctuation">;</span>
lc<span class="token punctuation">.</span><span class="token function">reset</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
configurator<span class="token punctuation">.</span><span class="token function">doConfigure</span><span class="token punctuation">(</span>namesrvConfig<span class="token punctuation">.</span><span class="token function">getRocketmqHome</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">"/conf/logback_namesrv.xml"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log <span class="token operator">=</span> <span class="token class-name">InternalLoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">LoggerName</span><span class="token punctuation">.</span><span class="token constant">NAMESRV_LOGGER_NAME</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">printObjectProperties</span><span class="token punctuation">(</span>log<span class="token punctuation">,</span> namesrvConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token function">printObjectProperties</span><span class="token punctuation">(</span>log<span class="token punctuation">,</span> nettyServerConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">final</span> <span class="token class-name">NamesrvController</span> controller <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">NamesrvController</span><span class="token punctuation">(</span>namesrvConfig<span class="token punctuation">,</span> nettyServerConfig<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// remember all configs to prevent discard</span>
controller<span class="token punctuation">.</span><span class="token function">getConfiguration</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">registerConfig</span><span class="token punctuation">(</span>properties<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> controller<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token class-name">NamesrvController</span> <span class="token function">start</span><span class="token punctuation">(</span><span class="token keyword">final</span> <span class="token class-name">NamesrvController</span> controller<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> controller<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">IllegalArgumentException</span><span class="token punctuation">(</span><span class="token string">"NamesrvController is null"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">boolean</span> initResult <span class="token operator">=</span> controller<span class="token punctuation">.</span><span class="token function">initialize</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>initResult<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
controller<span class="token punctuation">.</span><span class="token function">shutdown</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">exit</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">Runtime</span><span class="token punctuation">.</span><span class="token function">getRuntime</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">addShutdownHook</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">ShutdownHookThread</span><span class="token punctuation">(</span>log<span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">Callable</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Void</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token class-name">Void</span> <span class="token function">call</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">&#123;</span>
controller<span class="token punctuation">.</span><span class="token function">shutdown</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
controller<span class="token punctuation">.</span><span class="token function">start</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> controller<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token keyword">boolean</span> <span class="token function">initialize</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>kvConfigManager<span class="token punctuation">.</span><span class="token function">load</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>remotingServer <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">NettyRemotingServer</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>nettyServerConfig<span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>brokerHousekeepingService<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>remotingExecutor <span class="token operator">=</span>
<span class="token class-name">Executors</span><span class="token punctuation">.</span><span class="token function">newFixedThreadPool</span><span class="token punctuation">(</span>nettyServerConfig<span class="token punctuation">.</span><span class="token function">getServerWorkerThreads</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">ThreadFactoryImpl</span><span class="token punctuation">(</span><span class="token string">"RemotingExecutorThread_"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">registerProcessor</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>scheduledExecutorService<span class="token punctuation">.</span><span class="token function">scheduleAtFixedRate</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Runnable</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">NamesrvController</span><span class="token punctuation">.</span><span class="token keyword">this</span><span class="token punctuation">.</span>routeInfoManager<span class="token punctuation">.</span><span class="token function">scanNotActiveBroker</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token class-name">TimeUnit</span><span class="token punctuation">.</span><span class="token constant">SECONDS</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>scheduledExecutorService<span class="token punctuation">.</span><span class="token function">scheduleAtFixedRate</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Runnable</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">NamesrvController</span><span class="token punctuation">.</span><span class="token keyword">this</span><span class="token punctuation">.</span>kvConfigManager<span class="token punctuation">.</span><span class="token function">printAllPeriodically</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token class-name">TimeUnit</span><span class="token punctuation">.</span><span class="token constant">MINUTES</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsMode <span class="token operator">!=</span> <span class="token class-name">TlsMode</span><span class="token punctuation">.</span><span class="token constant">DISABLED</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">// Register a listener to reload SslContext</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
fileWatchService <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">FileWatchService</span><span class="token punctuation">(</span>
<span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsServerCertPath<span class="token punctuation">,</span>
<span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsServerKeyPath<span class="token punctuation">,</span>
<span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsServerTrustCertPath
<span class="token punctuation">&#125;</span><span class="token punctuation">,</span>
<span class="token keyword">new</span> <span class="token class-name">FileWatchService<span class="token punctuation">.</span>Listener</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">boolean</span> certChanged<span class="token punctuation">,</span> keyChanged <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">onChanged</span><span class="token punctuation">(</span><span class="token class-name">String</span> path<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>path<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span><span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsServerTrustCertPath<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"The trust certificate changed, reload the ssl context"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">reloadServerSslContext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>path<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span><span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsServerCertPath<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
certChanged <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>path<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span><span class="token class-name">TlsSystemConfig</span><span class="token punctuation">.</span>tlsServerKeyPath<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
keyChanged <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>certChanged <span class="token operator">&amp;&amp;</span> keyChanged<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"The certificate and private key changed, reload the ssl context"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
certChanged <span class="token operator">=</span> keyChanged <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token function">reloadServerSslContext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">reloadServerSslContext</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token class-name">NettyRemotingServer</span><span class="token punctuation">)</span> remotingServer<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">loadSslContext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span><span class="token string">"FileWatchService created error, can't load the certificate dynamically"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">RouteInfoManager</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token class-name">InternalLogger</span> log <span class="token operator">=</span> <span class="token class-name">InternalLoggerFactory</span><span class="token punctuation">.</span><span class="token function">getLogger</span><span class="token punctuation">(</span><span class="token class-name">LoggerName</span><span class="token punctuation">.</span><span class="token constant">NAMESRV_LOGGER_NAME</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token keyword">static</span> <span class="token keyword">long</span> <span class="token constant">BROKER_CHANNEL_EXPIRED_TIME</span> <span class="token operator">=</span> <span class="token number">1000</span> <span class="token operator">*</span> <span class="token number">60</span> <span class="token operator">*</span> <span class="token number">2</span><span class="token punctuation">;</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">ReadWriteLock</span> lock <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ReentrantReadWriteLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// topic与queue的对应关系</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">HashMap</span><span class="token operator">&lt;</span><span class="token class-name">String</span><span class="token comment">/* topic */</span><span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">QueueData</span><span class="token punctuation">></span></span><span class="token operator">></span> topicQueueTable<span class="token punctuation">;</span>
<span class="token comment">// Broker名称与broker属性的map</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">HashMap</span><span class="token operator">&lt;</span><span class="token class-name">String</span><span class="token comment">/* brokerName */</span><span class="token punctuation">,</span> <span class="token class-name">BrokerData</span><span class="token operator">></span> brokerAddrTable<span class="token punctuation">;</span>
<span class="token comment">// 集群与broker集合的对应关系</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">HashMap</span><span class="token operator">&lt;</span><span class="token class-name">String</span><span class="token comment">/* clusterName */</span><span class="token punctuation">,</span> <span class="token class-name">Set</span><span class="token operator">&lt;</span><span class="token class-name">String</span><span class="token comment">/* brokerName */</span><span class="token operator">>></span> clusterAddrTable<span class="token punctuation">;</span>
<span class="token comment">// 活跃的broker信息</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">HashMap</span><span class="token operator">&lt;</span><span class="token class-name">String</span><span class="token comment">/* brokerAddr */</span><span class="token punctuation">,</span> <span class="token class-name">BrokerLiveInfo</span><span class="token operator">></span> brokerLiveTable<span class="token punctuation">;</span>
<span class="token comment">// Broker地址与过滤器</span>
<span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">HashMap</span><span class="token operator">&lt;</span><span class="token class-name">String</span><span class="token comment">/* brokerAddr */</span><span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span></span><span class="token comment">/* Filter Server */</span><span class="token operator">></span> filterServerTable<span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">this</span><span class="token punctuation">.</span>scheduledExecutorService<span class="token punctuation">.</span><span class="token function">scheduleAtFixedRate</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Runnable</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">NamesrvController</span><span class="token punctuation">.</span><span class="token keyword">this</span><span class="token punctuation">.</span>routeInfoManager<span class="token punctuation">.</span><span class="token function">scanNotActiveBroker</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span class="token punctuation">,</span> <span class="token number">5</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token class-name">TimeUnit</span><span class="token punctuation">.</span><span class="token constant">SECONDS</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">scanNotActiveBroker</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BrokerLiveInfo</span><span class="token punctuation">></span><span class="token punctuation">></span></span> it <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>brokerLiveTable<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>it<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BrokerLiveInfo</span><span class="token punctuation">></span></span> next <span class="token operator">=</span> it<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">long</span> last <span class="token operator">=</span> next<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getLastUpdateTimestamp</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token punctuation">(</span>last <span class="token operator">+</span> <span class="token constant">BROKER_CHANNEL_EXPIRED_TIME</span><span class="token punctuation">)</span> <span class="token operator">&lt;</span> <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">RemotingUtil</span><span class="token punctuation">.</span><span class="token function">closeChannel</span><span class="token punctuation">(</span>next<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getChannel</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
it<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span><span class="token string">"The broker channel expired, &#123;&#125; &#123;&#125;ms"</span><span class="token punctuation">,</span> next<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token constant">BROKER_CHANNEL_EXPIRED_TIME</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">onChannelDestroy</span><span class="token punctuation">(</span>next<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> next<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getChannel</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">onChannelDestroy</span><span class="token punctuation">(</span><span class="token class-name">String</span> remoteAddr<span class="token punctuation">,</span> <span class="token class-name">Channel</span> channel<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> brokerAddrFound <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>channel <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>lock<span class="token punctuation">.</span><span class="token function">readLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">lockInterruptibly</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BrokerLiveInfo</span><span class="token punctuation">></span><span class="token punctuation">></span></span> itBrokerLiveTable <span class="token operator">=</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>brokerLiveTable<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>itBrokerLiveTable<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BrokerLiveInfo</span><span class="token punctuation">></span></span> entry <span class="token operator">=</span> itBrokerLiveTable<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>entry<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getChannel</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> channel<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
brokerAddrFound <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">break</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">finally</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>lock<span class="token punctuation">.</span><span class="token function">readLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">unlock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">error</span><span class="token punctuation">(</span><span class="token string">"onChannelDestroy Exception"</span><span class="token punctuation">,</span> e<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> brokerAddrFound<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
brokerAddrFound <span class="token operator">=</span> remoteAddr<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">else</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"the broker's channel destroyed, &#123;&#125;, clean it's data structure at once"</span><span class="token punctuation">,</span> brokerAddrFound<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerAddrFound <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> brokerAddrFound<span class="token punctuation">.</span><span class="token function">length</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>lock<span class="token punctuation">.</span><span class="token function">writeLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">lockInterruptibly</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>brokerLiveTable<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span>brokerAddrFound<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>filterServerTable<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span>brokerAddrFound<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> brokerNameFound <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token keyword">boolean</span> removeBrokerName <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">BrokerData</span><span class="token punctuation">></span><span class="token punctuation">></span></span> itBrokerAddrTable <span class="token operator">=</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>brokerAddrTable<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>itBrokerAddrTable<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> brokerNameFound<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">BrokerData</span> brokerData <span class="token operator">=</span> itBrokerAddrTable<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">Long</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> it <span class="token operator">=</span> brokerData<span class="token punctuation">.</span><span class="token function">getBrokerAddrs</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>it<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Long</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> entry <span class="token operator">=</span> it<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Long</span> brokerId <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> brokerAddr <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerAddr<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>brokerAddrFound<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
brokerNameFound <span class="token operator">=</span> brokerData<span class="token punctuation">.</span><span class="token function">getBrokerName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
it<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"remove brokerAddr[&#123;&#125;, &#123;&#125;] from brokerAddrTable, because channel destroyed"</span><span class="token punctuation">,</span>
brokerId<span class="token punctuation">,</span> brokerAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">break</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerData<span class="token punctuation">.</span><span class="token function">getBrokerAddrs</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">isEmpty</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
removeBrokerName <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
itBrokerAddrTable<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"remove brokerName[&#123;&#125;] from brokerAddrTable, because channel destroyed"</span><span class="token punctuation">,</span>
brokerData<span class="token punctuation">.</span><span class="token function">getBrokerName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerNameFound <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> removeBrokerName<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Set</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span><span class="token punctuation">></span></span> it <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>clusterAddrTable<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>it<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">Set</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> entry <span class="token operator">=</span> it<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> clusterName <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Set</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span></span> brokerNames <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">boolean</span> removed <span class="token operator">=</span> brokerNames<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span>brokerNameFound<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>removed<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"remove brokerName[&#123;&#125;], clusterName[&#123;&#125;] from clusterAddrTable, because channel destroyed"</span><span class="token punctuation">,</span>
brokerNameFound<span class="token punctuation">,</span> clusterName<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerNames<span class="token punctuation">.</span><span class="token function">isEmpty</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"remove the clusterName[&#123;&#125;] from clusterAddrTable, because channel destroyed and no broker in this cluster"</span><span class="token punctuation">,</span>
clusterName<span class="token punctuation">)</span><span class="token punctuation">;</span>
it<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">break</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>removeBrokerName<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token punctuation">&lt;</span><span class="token class-name">QueueData</span><span class="token punctuation">></span><span class="token punctuation">></span><span class="token punctuation">></span></span> itTopicQueueTable <span class="token operator">=</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>topicQueueTable<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>itTopicQueueTable<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token punctuation">&lt;</span><span class="token class-name">QueueData</span><span class="token punctuation">></span><span class="token punctuation">></span></span> entry <span class="token operator">=</span> itTopicQueueTable<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> topic <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">QueueData</span><span class="token punctuation">></span></span> queueDataList <span class="token operator">=</span> entry<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">QueueData</span><span class="token punctuation">></span></span> itQueueData <span class="token operator">=</span> queueDataList<span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>itQueueData<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">QueueData</span> queueData <span class="token operator">=</span> itQueueData<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>queueData<span class="token punctuation">.</span><span class="token function">getBrokerName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>brokerNameFound<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
itQueueData<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"remove topic[&#123;&#125; &#123;&#125;], from topicQueueTable, because channel destroyed"</span><span class="token punctuation">,</span>
topic<span class="token punctuation">,</span> queueData<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>queueDataList<span class="token punctuation">.</span><span class="token function">isEmpty</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
itTopicQueueTable<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"remove topic[&#123;&#125;] all queue, from topicQueueTable, because channel destroyed"</span><span class="token punctuation">,</span>
topic<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">finally</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>lock<span class="token punctuation">.</span><span class="token function">writeLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">unlock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">error</span><span class="token punctuation">(</span><span class="token string">"onChannelDestroy Exception"</span><span class="token punctuation">,</span> e<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">this</span><span class="token punctuation">.</span>scheduledExecutorService<span class="token punctuation">.</span><span class="token function">scheduleAtFixedRate</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Runnable</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">run</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">NamesrvController</span><span class="token punctuation">.</span><span class="token keyword">this</span><span class="token punctuation">.</span>kvConfigManager<span class="token punctuation">.</span><span class="token function">printAllPeriodically</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">,</span> <span class="token class-name">TimeUnit</span><span class="token punctuation">.</span><span class="token constant">MINUTES</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token class-name">RemotingCommand</span> <span class="token function">processRequest</span><span class="token punctuation">(</span><span class="token class-name">ChannelHandlerContext</span> ctx<span class="token punctuation">,</span>
<span class="token class-name">RemotingCommand</span> request<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">RemotingCommandException</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>ctx <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">"receive request, &#123;&#125; &#123;&#125; &#123;&#125;"</span><span class="token punctuation">,</span>
request<span class="token punctuation">.</span><span class="token function">getCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token class-name">RemotingHelper</span><span class="token punctuation">.</span><span class="token function">parseChannelRemoteAddr</span><span class="token punctuation">(</span>ctx<span class="token punctuation">.</span><span class="token function">channel</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">switch</span> <span class="token punctuation">(</span>request<span class="token punctuation">.</span><span class="token function">getCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">PUT_KV_CONFIG</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">putKVConfig</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_KV_CONFIG</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getKVConfig</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">DELETE_KV_CONFIG</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">deleteKVConfig</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">QUERY_DATA_VERSION</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token function">queryBrokerTopicConfig</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">REGISTER_BROKER</span><span class="token operator">:</span>
<span class="token class-name">Version</span> brokerVersion <span class="token operator">=</span> <span class="token class-name">MQVersion</span><span class="token punctuation">.</span><span class="token function">value2Version</span><span class="token punctuation">(</span>request<span class="token punctuation">.</span><span class="token function">getVersion</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerVersion<span class="token punctuation">.</span><span class="token function">ordinal</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">>=</span> <span class="token class-name">MQVersion<span class="token punctuation">.</span>Version</span><span class="token punctuation">.</span><span class="token constant">V3_0_11</span><span class="token punctuation">.</span><span class="token function">ordinal</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">registerBrokerWithFilterServer</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">else</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">registerBroker</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">UNREGISTER_BROKER</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">unregisterBroker</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_ROUTEINTO_BY_TOPIC</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getRouteInfoByTopic</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_BROKER_CLUSTER_INFO</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getBrokerClusterInfo</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">WIPE_WRITE_PERM_OF_BROKER</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">wipeWritePermOfBroker</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_ALL_TOPIC_LIST_FROM_NAMESERVER</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token function">getAllTopicListFromNameserver</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">DELETE_TOPIC_IN_NAMESRV</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token function">deleteTopicInNamesrv</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_KVLIST_BY_NAMESPACE</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getKVListByNamespace</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_TOPICS_BY_CLUSTER</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getTopicsByCluster</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_SYSTEM_TOPIC_LIST_FROM_NS</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getSystemTopicListFromNs</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_UNIT_TOPIC_LIST</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getUnitTopicList</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_HAS_UNIT_SUB_TOPIC_LIST</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getHasUnitSubTopicList</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_HAS_UNIT_SUB_UNUNIT_TOPIC_LIST</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getHasUnitSubUnUnitTopicList</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">UPDATE_NAMESRV_CONFIG</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">updateConfig</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">GET_NAMESRV_CONFIG</span><span class="token operator">:</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getConfig</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">default</span><span class="token operator">:</span>
<span class="token keyword">break</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>以broker注册为例，</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">case</span> <span class="token class-name">RequestCode</span><span class="token punctuation">.</span><span class="token constant">REGISTER_BROKER</span><span class="token operator">:</span>
<span class="token class-name">Version</span> brokerVersion <span class="token operator">=</span> <span class="token class-name">MQVersion</span><span class="token punctuation">.</span><span class="token function">value2Version</span><span class="token punctuation">(</span>request<span class="token punctuation">.</span><span class="token function">getVersion</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerVersion<span class="token punctuation">.</span><span class="token function">ordinal</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">>=</span> <span class="token class-name">MQVersion<span class="token punctuation">.</span>Version</span><span class="token punctuation">.</span><span class="token constant">V3_0_11</span><span class="token punctuation">.</span><span class="token function">ordinal</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">registerBrokerWithFilterServer</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">else</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">registerBroker</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>做了个简单的版本管理，我们看下前面一个的代码</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token class-name">RemotingCommand</span> <span class="token function">registerBrokerWithFilterServer</span><span class="token punctuation">(</span><span class="token class-name">ChannelHandlerContext</span> ctx<span class="token punctuation">,</span> <span class="token class-name">RemotingCommand</span> request<span class="token punctuation">)</span>
<span class="token keyword">throws</span> <span class="token class-name">RemotingCommandException</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">final</span> <span class="token class-name">RemotingCommand</span> response <span class="token operator">=</span> <span class="token class-name">RemotingCommand</span><span class="token punctuation">.</span><span class="token function">createResponseCommand</span><span class="token punctuation">(</span><span class="token class-name">RegisterBrokerResponseHeader</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">final</span> <span class="token class-name">RegisterBrokerResponseHeader</span> responseHeader <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token class-name">RegisterBrokerResponseHeader</span><span class="token punctuation">)</span> response<span class="token punctuation">.</span><span class="token function">readCustomHeader</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">final</span> <span class="token class-name">RegisterBrokerRequestHeader</span> requestHeader <span class="token operator">=</span>
<span class="token punctuation">(</span><span class="token class-name">RegisterBrokerRequestHeader</span><span class="token punctuation">)</span> request<span class="token punctuation">.</span><span class="token function">decodeCommandCustomHeader</span><span class="token punctuation">(</span><span class="token class-name">RegisterBrokerRequestHeader</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token function">checksum</span><span class="token punctuation">(</span>ctx<span class="token punctuation">,</span> request<span class="token punctuation">,</span> requestHeader<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
response<span class="token punctuation">.</span><span class="token function">setCode</span><span class="token punctuation">(</span><span class="token class-name">ResponseCode</span><span class="token punctuation">.</span><span class="token constant">SYSTEM_ERROR</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setRemark</span><span class="token punctuation">(</span><span class="token string">"crc32 not match"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> response<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">RegisterBrokerBody</span> registerBrokerBody <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">RegisterBrokerBody</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>request<span class="token punctuation">.</span><span class="token function">getBody</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
registerBrokerBody <span class="token operator">=</span> <span class="token class-name">RegisterBrokerBody</span><span class="token punctuation">.</span><span class="token function">decode</span><span class="token punctuation">(</span>request<span class="token punctuation">.</span><span class="token function">getBody</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> requestHeader<span class="token punctuation">.</span><span class="token function">isCompressed</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">RemotingCommandException</span><span class="token punctuation">(</span><span class="token string">"Failed to decode RegisterBrokerBody"</span><span class="token punctuation">,</span> e<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">else</span> <span class="token punctuation">&#123;</span>
registerBrokerBody<span class="token punctuation">.</span><span class="token function">getTopicConfigSerializeWrapper</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getDataVersion</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setCounter</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">AtomicLong</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
registerBrokerBody<span class="token punctuation">.</span><span class="token function">getTopicConfigSerializeWrapper</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getDataVersion</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">setTimestamp</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">RegisterBrokerResult</span> result <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>namesrvController<span class="token punctuation">.</span><span class="token function">getRouteInfoManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">registerBroker</span><span class="token punctuation">(</span>
requestHeader<span class="token punctuation">.</span><span class="token function">getClusterName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
requestHeader<span class="token punctuation">.</span><span class="token function">getBrokerAddr</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
requestHeader<span class="token punctuation">.</span><span class="token function">getBrokerName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
requestHeader<span class="token punctuation">.</span><span class="token function">getBrokerId</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
requestHeader<span class="token punctuation">.</span><span class="token function">getHaServerAddr</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
registerBrokerBody<span class="token punctuation">.</span><span class="token function">getTopicConfigSerializeWrapper</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
registerBrokerBody<span class="token punctuation">.</span><span class="token function">getFilterServerList</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
ctx<span class="token punctuation">.</span><span class="token function">channel</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
responseHeader<span class="token punctuation">.</span><span class="token function">setHaServerAddr</span><span class="token punctuation">(</span>result<span class="token punctuation">.</span><span class="token function">getHaServerAddr</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
responseHeader<span class="token punctuation">.</span><span class="token function">setMasterAddr</span><span class="token punctuation">(</span>result<span class="token punctuation">.</span><span class="token function">getMasterAddr</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> jsonValue <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>namesrvController<span class="token punctuation">.</span><span class="token function">getKvConfigManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getKVListByNamespace</span><span class="token punctuation">(</span><span class="token class-name">NamesrvUtil</span><span class="token punctuation">.</span><span class="token constant">NAMESPACE_ORDER_TOPIC_CONFIG</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setBody</span><span class="token punctuation">(</span>jsonValue<span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setCode</span><span class="token punctuation">(</span><span class="token class-name">ResponseCode</span><span class="token punctuation">.</span><span class="token constant">SUCCESS</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setRemark</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> response<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token class-name">RegisterBrokerResult</span> <span class="token function">registerBroker</span><span class="token punctuation">(</span>
<span class="token keyword">final</span> <span class="token class-name">String</span> clusterName<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">String</span> brokerAddr<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">String</span> brokerName<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token keyword">long</span> brokerId<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">String</span> haServerAddr<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">TopicConfigSerializeWrapper</span> topicConfigWrapper<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span></span> filterServerList<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">Channel</span> channel<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">RegisterBrokerResult</span> result <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">RegisterBrokerResult</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>lock<span class="token punctuation">.</span><span class="token function">writeLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">lockInterruptibly</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 更新这个clusterAddrTable</span>
<span class="token class-name">Set</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span></span> brokerNames <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>clusterAddrTable<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>clusterName<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> brokerNames<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
brokerNames <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HashSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>clusterAddrTable<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>clusterName<span class="token punctuation">,</span> brokerNames<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
brokerNames<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span>brokerName<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">boolean</span> registerFirst <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token comment">// 更新brokerAddrTable</span>
<span class="token class-name">BrokerData</span> brokerData <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>brokerAddrTable<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>brokerName<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> brokerData<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
registerFirst <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
brokerData <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">BrokerData</span><span class="token punctuation">(</span>clusterName<span class="token punctuation">,</span> brokerName<span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">HashMap</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Long</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>brokerAddrTable<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>brokerName<span class="token punctuation">,</span> brokerData<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">Map</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Long</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> brokerAddrsMap <span class="token operator">=</span> brokerData<span class="token punctuation">.</span><span class="token function">getBrokerAddrs</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//Switch slave to master: first remove &lt;1, IP:PORT> in namesrv, then add &lt;0, IP:PORT></span>
<span class="token comment">//The same IP:PORT must only have one record in brokerAddrTable</span>
<span class="token class-name">Iterator</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Entry</span><span class="token punctuation">&lt;</span><span class="token class-name">Long</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span><span class="token punctuation">></span></span> it <span class="token operator">=</span> brokerAddrsMap<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">iterator</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span>it<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Long</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">></span></span> item <span class="token operator">=</span> it<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">!=</span> brokerAddr <span class="token operator">&amp;&amp;</span> brokerAddr<span class="token punctuation">.</span><span class="token function">equals</span><span class="token punctuation">(</span>item<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token operator">&amp;&amp;</span> brokerId <span class="token operator">!=</span> item<span class="token punctuation">.</span><span class="token function">getKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
it<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">String</span> oldAddr <span class="token operator">=</span> brokerData<span class="token punctuation">.</span><span class="token function">getBrokerAddrs</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>brokerId<span class="token punctuation">,</span> brokerAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
registerFirst <span class="token operator">=</span> registerFirst <span class="token operator">||</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> oldAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 更新了org.apache.rocketmq.namesrv.routeinfo.RouteInfoManager#topicQueueTable中的数据</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">!=</span> topicConfigWrapper
<span class="token operator">&amp;&amp;</span> <span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token constant">MASTER_ID</span> <span class="token operator">==</span> brokerId<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">isBrokerTopicConfigChanged</span><span class="token punctuation">(</span>brokerAddr<span class="token punctuation">,</span> topicConfigWrapper<span class="token punctuation">.</span><span class="token function">getDataVersion</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token operator">||</span> registerFirst<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">ConcurrentMap</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">TopicConfig</span><span class="token punctuation">></span></span> tcTable <span class="token operator">=</span>
topicConfigWrapper<span class="token punctuation">.</span><span class="token function">getTopicConfigTable</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>tcTable <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">Map<span class="token punctuation">.</span>Entry</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">String</span><span class="token punctuation">,</span> <span class="token class-name">TopicConfig</span><span class="token punctuation">></span></span> entry <span class="token operator">:</span> tcTable<span class="token punctuation">.</span><span class="token function">entrySet</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">createAndUpdateQueueData</span><span class="token punctuation">(</span>brokerName<span class="token punctuation">,</span> entry<span class="token punctuation">.</span><span class="token function">getValue</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 更新活跃broker信息</span>
<span class="token class-name">BrokerLiveInfo</span> prevBrokerLiveInfo <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>brokerLiveTable<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>brokerAddr<span class="token punctuation">,</span>
<span class="token keyword">new</span> <span class="token class-name">BrokerLiveInfo</span><span class="token punctuation">(</span>
<span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">currentTimeMillis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
topicConfigWrapper<span class="token punctuation">.</span><span class="token function">getDataVersion</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
channel<span class="token punctuation">,</span>
haServerAddr<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">null</span> <span class="token operator">==</span> prevBrokerLiveInfo<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">info</span><span class="token punctuation">(</span><span class="token string">"new broker registered, &#123;&#125; HAServer: &#123;&#125;"</span><span class="token punctuation">,</span> brokerAddr<span class="token punctuation">,</span> haServerAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 处理filter</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>filterServerList <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>filterServerList<span class="token punctuation">.</span><span class="token function">isEmpty</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>filterServerTable<span class="token punctuation">.</span><span class="token function">remove</span><span class="token punctuation">(</span>brokerAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">else</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>filterServerTable<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>brokerAddr<span class="token punctuation">,</span> filterServerList<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 当当前broker非master时返回master信息</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token constant">MASTER_ID</span> <span class="token operator">!=</span> brokerId<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> masterAddr <span class="token operator">=</span> brokerData<span class="token punctuation">.</span><span class="token function">getBrokerAddrs</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token class-name">MixAll</span><span class="token punctuation">.</span><span class="token constant">MASTER_ID</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>masterAddr <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">BrokerLiveInfo</span> brokerLiveInfo <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>brokerLiveTable<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>masterAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>brokerLiveInfo <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
result<span class="token punctuation">.</span><span class="token function">setHaServerAddr</span><span class="token punctuation">(</span>brokerLiveInfo<span class="token punctuation">.</span><span class="token function">getHaServerAddr</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
result<span class="token punctuation">.</span><span class="token function">setMasterAddr</span><span class="token punctuation">(</span>masterAddr<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">finally</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>lock<span class="token punctuation">.</span><span class="token function">writeLock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">unlock</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Exception</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
log<span class="token punctuation">.</span><span class="token function">error</span><span class="token punctuation">(</span><span class="token string">"registerBroker Exception"</span><span class="token punctuation">,</span> e<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> result<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token class-name">RemotingCommand</span> <span class="token function">getRouteInfoByTopic</span><span class="token punctuation">(</span><span class="token class-name">ChannelHandlerContext</span> ctx<span class="token punctuation">,</span>
<span class="token class-name">RemotingCommand</span> request<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">RemotingCommandException</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">final</span> <span class="token class-name">RemotingCommand</span> response <span class="token operator">=</span> <span class="token class-name">RemotingCommand</span><span class="token punctuation">.</span><span class="token function">createResponseCommand</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">final</span> <span class="token class-name">GetRouteInfoRequestHeader</span> requestHeader <span class="token operator">=</span>
<span class="token punctuation">(</span><span class="token class-name">GetRouteInfoRequestHeader</span><span class="token punctuation">)</span> request<span class="token punctuation">.</span><span class="token function">decodeCommandCustomHeader</span><span class="token punctuation">(</span><span class="token class-name">GetRouteInfoRequestHeader</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">TopicRouteData</span> topicRouteData <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>namesrvController<span class="token punctuation">.</span><span class="token function">getRouteInfoManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">pickupTopicRouteData</span><span class="token punctuation">(</span>requestHeader<span class="token punctuation">.</span><span class="token function">getTopic</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>topicRouteData <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>namesrvController<span class="token punctuation">.</span><span class="token function">getNamesrvConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">isOrderMessageEnable</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> orderTopicConf <span class="token operator">=</span>
<span class="token keyword">this</span><span class="token punctuation">.</span>namesrvController<span class="token punctuation">.</span><span class="token function">getKvConfigManager</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getKVConfig</span><span class="token punctuation">(</span><span class="token class-name">NamesrvUtil</span><span class="token punctuation">.</span><span class="token constant">NAMESPACE_ORDER_TOPIC_CONFIG</span><span class="token punctuation">,</span>
requestHeader<span class="token punctuation">.</span><span class="token function">getTopic</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
topicRouteData<span class="token punctuation">.</span><span class="token function">setOrderTopicConf</span><span class="token punctuation">(</span>orderTopicConf<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">byte</span><span class="token punctuation">[</span><span class="token punctuation">]</span> content <span class="token operator">=</span> topicRouteData<span class="token punctuation">.</span><span class="token function">encode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setBody</span><span class="token punctuation">(</span>content<span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setCode</span><span class="token punctuation">(</span><span class="token class-name">ResponseCode</span><span class="token punctuation">.</span><span class="token constant">SUCCESS</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setRemark</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> response<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
response<span class="token punctuation">.</span><span class="token function">setCode</span><span class="token punctuation">(</span><span class="token class-name">ResponseCode</span><span class="token punctuation">.</span><span class="token constant">TOPIC_NOT_EXIST</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
response<span class="token punctuation">.</span><span class="token function">setRemark</span><span class="token punctuation">(</span><span class="token string">"No topic route info in name server for the topic: "</span> <span class="token operator">+</span> requestHeader<span class="token punctuation">.</span><span class="token function">getTopic</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token operator">+</span> <span class="token class-name">FAQUrl</span><span class="token punctuation">.</span><span class="token function">suggestTodo</span><span class="token punctuation">(</span><span class="token class-name">FAQUrl</span><span class="token punctuation">.</span><span class="token constant">APPLY_TOPIC_URL</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> response<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><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><p>简要分析了下 RocketMQ 的 NameServer 的代码，比较粗粒度。</p></div><footer class="post-footer"><div class="reward-container"><div>Buy me a coffee</div><button>赞赏</button><div class="post-reward"><div><img src="https://i.loli.net/2020/01/12/NUlWanT31E8LQGx.png" alt="Nicksxs 微信"> <span>微信</span></div><div><img src="https://ooo.0o0.ooo/2016/08/17/57b421e773057.jpg" alt="Nicksxs 支付宝"> <span>支付宝</span></div></div></div><div class="post-copyright"><ul><li class="post-copyright-author"><strong>本文作者： </strong>Nicksxs</li><li class="post-copyright-link"><strong>本文链接：</strong> <a href="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/" title="聊一下 RocketMQ 的 NameServer 源码">https://nicksxs.me/2020/07/05/聊一下-RocketMQ-的-NameServer-源码/</a></li><li class="post-copyright-license"><strong>版权声明： </strong>本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" rel="noopener" target="_blank"><i class="fab fa-fw fa-creative-commons"></i>BY-NC-SA</a> 许可协议。转载请注明出处！</li></ul></div><div class="post-tags"><a href="/tags/MQ/" rel="tag"># MQ</a> <a href="/tags/%E6%B6%88%E6%81%AF%E9%98%9F%E5%88%97/" rel="tag"># 消息队列</a> <a href="/tags/RocketMQ/" rel="tag"># RocketMQ</a> <a href="/tags/%E5%89%8A%E5%B3%B0%E5%A1%AB%E8%B0%B7/" rel="tag"># 削峰填谷</a> <a href="/tags/%E4%B8%AD%E9%97%B4%E4%BB%B6/" rel="tag"># 中间件</a> <a href="/tags/NameServer/" rel="tag"># NameServer</a> <a href="/tags/%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/" rel="tag"># 源码解析</a></div><div class="post-nav"><div class="post-nav-item"><a href="/2020/06/26/%E8%81%8A%E4%B8%80%E4%B8%8B-RocketMQ-%E7%9A%84-Consumer/" rel="prev" title="聊一下 RocketMQ 的 DefaultMQPushConsumer 源码"><i class="fa fa-chevron-left"></i> 聊一下 RocketMQ 的 DefaultMQPushConsumer 源码</a></div><div class="post-nav-item"><a href="/2020/07/11/2020%E5%B9%B4%E4%B8%AD%E6%80%BB%E7%BB%93/" rel="next" title="2020年中总结">2020年中总结 <i class="fa fa-chevron-right"></i></a></div></div></footer></article></div><div class="comments" id="disqus_thread"><noscript>Please enable JavaScript to view the comments powered by Disqus.</noscript></div></div></main><footer class="footer"><div class="footer-inner"><div class="beian"><a href="https://beian.miit.gov.cn/" rel="noopener" target="_blank">浙ICP备16002580号-2 </a><img src="/uploads/beian.png" alt=""><a href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=33010602011094" rel="noopener" target="_blank">浙公网安备 33010602011094号</a></div><div class="copyright">&copy; 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