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${ item.name }
Create branch ${ searchTerm }
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${ noResults }
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<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width"><meta name="theme-color" content="#222"><meta name="generator" content="Hexo 6.3.0"><link rel="preconnect" href="https://fonts.googleapis.com" crossorigin><link rel="preconnect" href="https://cdnjs.cloudflare.com" crossorigin><link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png"><link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png"><link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png"><link rel="mask-icon" href="/images/logo.svg" color="#222"><meta name="google-site-verification" content="2X6S9P7CAjXjVvw8YyQR8pCu-B0oEu7O9quLgxXuWyA"><meta name="baidu-site-verification" content="dV8JGNzi0c"><script>setTimeout(function(){var 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class="next-config" data-name="main" type="application/json">{"hostname":"nicksxs.me","root":"/","images":"/images","scheme":"Pisces","darkmode":false,"version":"8.12.1","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":true,"style":"mac"},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":true,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":false,"async":false,"transition":{"post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"path":"/search.xml","localsearch":{"enable":true,"trigger":"auto","top_n_per_article":1,"unescape":true,"preload":true}}</script><script src="/js/config.js"></script><meta name="description" content="learn from zero,技术博客，Nicksxs，史学森"><meta property="og:type" content="website"><meta property="og:title" content="Nicksxs&#39;s Blog"><meta property="og:url" content="https://nicksxs.me/index.html"><meta property="og:site_name" content="Nicksxs&#39;s Blog"><meta property="og:description" content="learn from zero,技术博客，Nicksxs，史学森"><meta property="og:locale" content="zh_CN"><meta property="article:author" content="Nicksxs"><meta property="article:tag" content="Nicksxs,史学森,米方方,米方方的男朋友,森哥"><meta name="twitter:card" content="summary"><link rel="canonical" href="https://nicksxs.me/"><script class="next-config" data-name="page" type="application/json">{"sidebar":"","isHome":true,"isPost":false,"lang":"zh-CN","comments":"","permalink":"","path":"index.html","title":""}</script><script class="next-config" data-name="calendar" type="application/json">""</script><title>Nicksxs's Blog - What hurts more, the pain of hard work or the pain of regret?</title><script async src="https://www.googletagmanager.com/gtag/js?id=UA-61358619-1"></script><script class="next-config" data-name="google_analytics" type="application/json">{"tracking_id":"UA-61358619-1","only_pageview":false}</script><script src="/js/third-party/analytics/google-analytics.js"></script><script src="/js/third-party/analytics/baidu-analytics.js"></script><script async src="https://hm.baidu.com/hm.js?20f33b3c0c0eff9b1522999c0015646d"></script><noscript><link rel="stylesheet" href="/css/noscript.css"></noscript><link rel="alternate" href="/atom.xml" title="Nicksxs's Blog" type="application/atom+xml"></head><body itemscope itemtype="http://schema.org/WebPage"><div class="headband"></div><main class="main"><header class="header" itemscope itemtype="http://schema.org/WPHeader"><div class="header-inner"><div class="site-brand-container"><div class="site-nav-toggle"><div class="toggle" aria-label="切换导航栏" role="button"><span class="toggle-line"></span> <span class="toggle-line"></span> <span class="toggle-line"></span></div></div><div class="site-meta"><a href="/" class="brand" rel="start"><i class="logo-line"></i><h1 class="site-title">Nicksxs's Blog</h1><i class="logo-line"></i></a><p class="site-subtitle" itemprop="description">What hurts more, the pain of hard work or the pain of regret?</p></div><div class="site-nav-right"><div class="toggle popup-trigger"><i class="fa fa-search fa-fw fa-lg"></i></div></div></div><nav class="site-nav"><ul class="main-menu menu"><li class="menu-item menu-item-home"><a href="/" rel="section"><i class="fa fa-home fa-fw"></i>首页</a></li><li class="menu-item menu-item-about"><a href="/about/" rel="section"><i class="fa fa-user fa-fw"></i>关于</a></li><li class="menu-item menu-item-tags"><a href="/tags/" rel="section"><i class="fa fa-tags fa-fw"></i>标签</a></li><li class="menu-item menu-item-categories"><a href="/categories/" rel="section"><i class="fa fa-th fa-fw"></i>分类</a></li><li class="menu-item menu-item-archives"><a href="/archives/" rel="section"><i class="fa fa-archive fa-fw"></i>归档</a></li><li class="menu-item menu-item-top"><a href="/top/" rel="section"><i class="fa fa-th fa-fw"></i>热度</a></li><li class="menu-item menu-item-sitemap"><a href="/sitemap.xml" rel="section"><i class="fa fa-sitemap fa-fw"></i>站点地图</a></li><li class="menu-item menu-item-commonweal"><a href="/404/" rel="section"><i class="fa fa-heartbeat fa-fw"></i>公益 404</a></li><li class="menu-item menu-item-search"><a role="button" class="popup-trigger"><i class="fa fa-search fa-fw"></i>搜索</a></li></ul></nav><div class="search-pop-overlay"><div class="popup search-popup"><div class="search-header"><span class="search-icon"><i class="fa fa-search"></i></span><div class="search-input-container"><input autocomplete="off" autocapitalize="off" maxlength="80" placeholder="搜索..." spellcheck="false" type="search" class="search-input"></div><span class="popup-btn-close" role="button"><i class="fa 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zero,技术博客，Nicksxs，史学森</div></div><div class="site-state-wrap site-overview-item animated"><nav class="site-state"><div class="site-state-item site-state-posts"><a href="/archives/"><span class="site-state-item-count">180</span> <span class="site-state-item-name">日志</span></a></div><div class="site-state-item site-state-categories"><a href="/categories/"><span class="site-state-item-count">148</span> <span class="site-state-item-name">分类</span></a></div><div class="site-state-item site-state-tags"><a href="/tags/"><span class="site-state-item-count">284</span> <span class="site-state-item-name">标签</span></a></div></nav></div><div class="links-of-author site-overview-item animated"><span class="links-of-author-item"><a href="https://github.com/nicksxs" title="GitHub → https:&#x2F;&#x2F;github.com&#x2F;nicksxs" rel="noopener" target="_blank"><i class="fab fa-github fa-fw"></i>GitHub</a> </span><span class="links-of-author-item"><a href="mailto:nicksxs1202@gmail.com" title="E-Mail → 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class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/2021/" rel="tag">2021</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/2PC/" rel="tag">2PC</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/360-%E5%85%A8%E5%AE%B6%E6%A1%B6/" rel="tag">360 全家桶</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/3PC/" rel="tag">3PC</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/3Sum-Closest/" rel="tag">3Sum Closest</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/AOP/" rel="tag">AOP</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/Adaptive/" rel="tag">Adaptive</a><span class="tag-list-count">1</span></li><li 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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 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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 class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%AD%97%E7%AC%A6%E9%9B%86/" rel="tag">字符集</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%AE%89%E5%85%A8/" rel="tag">安全</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%AE%B9%E9%94%99%E6%9C%BA%E5%88%B6/" rel="tag">容错机制</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%AF%84%E7%94%9F%E8%99%AB/" rel="tag">寄生虫</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B0%84%E5%87%BB/" rel="tag">射击</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B0%8F%E6%8A%80%E5%B7%A7/" rel="tag">小技巧</a><span class="tag-list-count">5</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B1%80%E5%8F%A3%E8%A1%97/" rel="tag">局口街</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B8%83%E9%9A%86%E8%BF%87%E6%BB%A4%E5%99%A8/" rel="tag">布隆过滤器</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B9%B2%E6%B4%BB/" rel="tag">干活</a><span class="tag-list-count">5</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B9%B4%E4%B8%AD%E6%80%BB%E7%BB%93/" rel="tag">年中总结</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B9%B4%E7%BB%88%E6%80%BB%E7%BB%93/" rel="tag">年终总结</a><span class="tag-list-count">3</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B9%B6%E5%8F%91/" rel="tag">并发</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B9%B8%E7%A6%8F%E4%BA%86%E5%90%97/" rel="tag">幸福了吗</a><span class="tag-list-count">1</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%B9%BB%E8%AF%BB/" rel="tag">幻读</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%BA%94%E7%94%A8/" rel="tag">应用</a><span class="tag-list-count">2</span></li><li class="tag-list-item"><a class="tag-list-link" href="/tags/%E5%BC%80%E8%BD%A6/" rel="tag">开车</a><span 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itemscope itemtype="http://schema.org/Thing"><a href="/categories/java/" itemprop="url" rel="index"><span itemprop="name">java</span></a> </span></span><span id="/2022/10/09/%E8%AE%B0%E4%B8%80%E4%B8%AA%E5%AE%B9%E5%99%A8%E4%B8%AD-dubbo-%E6%B3%A8%E5%86%8C%E7%9A%84%E5%B0%8F%E7%9F%A5%E8%AF%86%E7%82%B9/" class="post-meta-item leancloud_visitors" data-flag-title="记一个容器中 dubbo 注册的小知识点" title="阅读次数"><span class="post-meta-item-icon"><i class="far fa-eye"></i> </span><span class="post-meta-item-text">阅读次数：</span> <span class="leancloud-visitors-count"></span> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-comment"></i> </span><span class="post-meta-item-text">Disqus：</span> <a title="disqus" href="/2022/10/09/%E8%AE%B0%E4%B8%80%E4%B8%AA%E5%AE%B9%E5%99%A8%E4%B8%AD-dubbo-%E6%B3%A8%E5%86%8C%E7%9A%84%E5%B0%8F%E7%9F%A5%E8%AF%86%E7%82%B9/#disqus_thread" itemprop="discussionUrl"><span class="post-comments-count disqus-comment-count" data-disqus-identifier="2022/10/09/记一个容器中-dubbo-注册的小知识点/" itemprop="commentCount"></span></a></span></div></div></header><div class="post-body" itemprop="articleBody"><p>在目前环境下使用容器部署Java应用还是挺普遍的，但是有一些问题也是随之而来需要解决的，比如容器中应用的dubbo注册，在比较早的版本的dubbo中，就是简单地获取网卡的ip地址。<br>具体代码在这个方法里 <code>com.alibaba.dubbo.config.ServiceConfig#doExportUrlsFor1Protocol</code></p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">doExportUrlsFor1Protocol</span><span class="token punctuation">(</span><span class="token class-name">ProtocolConfig</span> protocolConfig<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span>URL<span class="token punctuation">></span></span> registryURLs<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> name <span class="token operator">=</span> protocolConfig<span class="token punctuation">.</span><span class="token function">getName</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>name <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> name<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>
name <span class="token operator">=</span> <span class="token string">"dubbo"</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">String</span> host <span class="token operator">=</span> protocolConfig<span class="token punctuation">.</span><span class="token function">getHost</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>provider <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> <span class="token punctuation">(</span>host <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> host<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">)</span> <span class="token punctuation">&#123;</span>
host <span class="token operator">=</span> provider<span class="token punctuation">.</span><span class="token function">getHost</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">boolean</span> anyhost <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token class-name">NetUtils</span><span class="token punctuation">.</span><span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>host<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
anyhost <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
host <span class="token operator">=</span> <span class="token class-name">InetAddress</span><span class="token punctuation">.</span><span class="token function">getLocalHost</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getHostAddress</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">UnknownHostException</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
logger<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</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">if</span> <span class="token punctuation">(</span><span class="token class-name">NetUtils</span><span class="token punctuation">.</span><span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>host<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>registryURLs <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> registryURLs<span class="token punctuation">.</span><span class="token function">size</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">for</span> <span class="token punctuation">(</span><span class="token constant">URL</span> registryURL <span class="token operator">:</span> registryURLs<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">Socket</span> socket <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Socket</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 class-name">SocketAddress</span> addr <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">InetSocketAddress</span><span class="token punctuation">(</span>registryURL<span class="token punctuation">.</span><span class="token function">getHost</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> registryURL<span class="token punctuation">.</span><span class="token function">getPort</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
socket<span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span>addr<span class="token punctuation">,</span> <span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
host <span class="token operator">=</span> socket<span class="token punctuation">.</span><span class="token function">getLocalAddress</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getHostAddress</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 keyword">finally</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
socket<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 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><span class="token punctuation">&#125;</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>
logger<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</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 class="token keyword">if</span> <span class="token punctuation">(</span><span class="token class-name">NetUtils</span><span class="token punctuation">.</span><span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>host<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
host <span class="token operator">=</span> <span class="token class-name">NetUtils</span><span class="token punctuation">.</span><span class="token function">getLocalHost</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 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></code></pre><p>通过jdk自带的方法 <code>java.net.InetAddress#getLocalHost</code>来获取本机地址，这样子对于容器来讲，获取到容器内部ip注册上去其实是没办法被调用到的，<br>而在之后的版本中例如dubbo 2.6.5，则可以通过在docker中设置环境变量的形式来注入docker所在的宿主机地址，<br>代码同样在<code>com.alibaba.dubbo.config.ServiceConfig#doExportUrlsFor1Protocol</code>这个方法中，但是获取host的方法变成了 <code>com.alibaba.dubbo.config.ServiceConfig#findConfigedHosts</code></p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token class-name">String</span> <span class="token function">findConfigedHosts</span><span class="token punctuation">(</span><span class="token class-name">ProtocolConfig</span> protocolConfig<span class="token punctuation">,</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span>URL<span class="token punctuation">></span></span> registryURLs<span class="token punctuation">,</span> <span class="token class-name">Map</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">String</span><span class="token punctuation">></span></span> map<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">boolean</span> anyhost <span class="token operator">=</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> hostToBind <span class="token operator">=</span> <span class="token function">getValueFromConfig</span><span class="token punctuation">(</span>protocolConfig<span class="token punctuation">,</span> <span class="token class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">DUBBO_IP_TO_BIND</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>hostToBind <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> hostToBind<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 operator">&amp;&amp;</span> <span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>hostToBind<span class="token punctuation">)</span><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">"Specified invalid bind ip from property:"</span> <span class="token operator">+</span> <span class="token class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">DUBBO_IP_TO_BIND</span> <span class="token operator">+</span> <span class="token string">", value:"</span> <span class="token operator">+</span> hostToBind<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// if bind ip is not found in environment, keep looking up</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>hostToBind <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> hostToBind<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>
hostToBind <span class="token operator">=</span> protocolConfig<span class="token punctuation">.</span><span class="token function">getHost</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>provider <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> <span class="token punctuation">(</span>hostToBind <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> hostToBind<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">)</span> <span class="token punctuation">&#123;</span>
hostToBind <span class="token operator">=</span> provider<span class="token punctuation">.</span><span class="token function">getHost</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><span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>hostToBind<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
anyhost <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
hostToBind <span class="token operator">=</span> <span class="token class-name">InetAddress</span><span class="token punctuation">.</span><span class="token function">getLocalHost</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getHostAddress</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">UnknownHostException</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
logger<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</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">if</span> <span class="token punctuation">(</span><span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>hostToBind<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>registryURLs <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> <span class="token operator">!</span>registryURLs<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">for</span> <span class="token punctuation">(</span><span class="token constant">URL</span> registryURL <span class="token operator">:</span> registryURLs<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 class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">MULTICAST</span><span class="token punctuation">.</span><span class="token function">equalsIgnoreCase</span><span class="token punctuation">(</span>registryURL<span class="token punctuation">.</span><span class="token function">getParameter</span><span class="token punctuation">(</span><span class="token string">"registry"</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 comment">// skip multicast registry since we cannot connect to it via Socket</span>
<span class="token keyword">continue</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Socket</span> socket <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Socket</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 class-name">SocketAddress</span> addr <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">InetSocketAddress</span><span class="token punctuation">(</span>registryURL<span class="token punctuation">.</span><span class="token function">getHost</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> registryURL<span class="token punctuation">.</span><span class="token function">getPort</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
socket<span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span>addr<span class="token punctuation">,</span> <span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
hostToBind <span class="token operator">=</span> socket<span class="token punctuation">.</span><span class="token function">getLocalAddress</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">getHostAddress</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 keyword">finally</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
socket<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 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>
<span class="token punctuation">&#125;</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>
logger<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</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 class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>hostToBind<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
hostToBind <span class="token operator">=</span> <span class="token function">getLocalHost</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>
map<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">BIND_IP_KEY</span><span class="token punctuation">,</span> hostToBind<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// registry ip is not used for bind ip by default</span>
<span class="token class-name">String</span> hostToRegistry <span class="token operator">=</span> <span class="token function">getValueFromConfig</span><span class="token punctuation">(</span>protocolConfig<span class="token punctuation">,</span> <span class="token class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">DUBBO_IP_TO_REGISTRY</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>hostToRegistry <span class="token operator">!=</span> <span class="token keyword">null</span> <span class="token operator">&amp;&amp;</span> hostToRegistry<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 operator">&amp;&amp;</span> <span class="token function">isInvalidLocalHost</span><span class="token punctuation">(</span>hostToRegistry<span class="token punctuation">)</span><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">"Specified invalid registry ip from property:"</span> <span class="token operator">+</span> <span class="token class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">DUBBO_IP_TO_REGISTRY</span> <span class="token operator">+</span> <span class="token string">", value:"</span> <span class="token operator">+</span> hostToRegistry<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 keyword">if</span> <span class="token punctuation">(</span>hostToRegistry <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> hostToRegistry<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 comment">// bind ip is used as registry ip by default</span>
hostToRegistry <span class="token operator">=</span> hostToBind<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
map<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token class-name">Constants</span><span class="token punctuation">.</span><span class="token constant">ANYHOST_KEY</span><span class="token punctuation">,</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">valueOf</span><span class="token punctuation">(</span>anyhost<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> hostToRegistry<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></code></pre><p><code>String hostToRegistry = getValueFromConfig(protocolConfig, Constants.DUBBO_IP_TO_REGISTRY);</code><br>就是这一行，</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token class-name">String</span> <span class="token function">getValueFromConfig</span><span class="token punctuation">(</span><span class="token class-name">ProtocolConfig</span> protocolConfig<span class="token punctuation">,</span> <span class="token class-name">String</span> key<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> protocolPrefix <span class="token operator">=</span> protocolConfig<span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toUpperCase</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">"_"</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> port <span class="token operator">=</span> <span class="token class-name">ConfigUtils</span><span class="token punctuation">.</span><span class="token function">getSystemProperty</span><span class="token punctuation">(</span>protocolPrefix <span class="token operator">+</span> key<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>port <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> port<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>
port <span class="token operator">=</span> <span class="token class-name">ConfigUtils</span><span class="token punctuation">.</span><span class="token function">getSystemProperty</span><span class="token punctuation">(</span>key<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> port<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></code></pre><p>也就是配置了<code>DUBBO_IP_TO_REGISTRY</code>这个环境变量</p></div><footer class="post-footer"><div class="post-eof"></div></footer></article></div><div class="post-block"><article itemscope itemtype="http://schema.org/Article" class="post-content"><link itemprop="mainEntityOfPage" href="https://nicksxs.me/2022/10/02/Leetcode-747-%E8%87%B3%E5%B0%91%E6%98%AF%E5%85%B6%E4%BB%96%E6%95%B0%E5%AD%97%E4%B8%A4%E5%80%8D%E7%9A%84%E6%9C%80%E5%A4%A7%E6%95%B0-Largest-Number-At-Least-Twice-of-Others-Easy-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/"><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="undefined | Nicksxs's Blog"><meta itemprop="description" content=""></span><header class="post-header"><h2 class="post-title" itemprop="name headline"><a href="/2022/10/02/Leetcode-747-%E8%87%B3%E5%B0%91%E6%98%AF%E5%85%B6%E4%BB%96%E6%95%B0%E5%AD%97%E4%B8%A4%E5%80%8D%E7%9A%84%E6%9C%80%E5%A4%A7%E6%95%B0-Largest-Number-At-Least-Twice-of-Others-Easy-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/" class="post-title-link" itemprop="url">Leetcode 747 至少是其他数字两倍的最大数 ( Largest Number At Least Twice of Others *Easy* ) 题解分析</a></h2><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：2022-10-02 20:14:13" itemprop="dateCreated datePublished" datetime="2022-10-02T20:14:13+08:00">2022-10-02</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/Java/" itemprop="url" rel="index"><span itemprop="name">Java</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/Java/leetcode/" itemprop="url" rel="index"><span itemprop="name">leetcode</span></a> </span></span><span id="/2022/10/02/Leetcode-747-%E8%87%B3%E5%B0%91%E6%98%AF%E5%85%B6%E4%BB%96%E6%95%B0%E5%AD%97%E4%B8%A4%E5%80%8D%E7%9A%84%E6%9C%80%E5%A4%A7%E6%95%B0-Largest-Number-At-Least-Twice-of-Others-Easy-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/" class="post-meta-item leancloud_visitors" data-flag-title="Leetcode 747 至少是其他数字两倍的最大数 ( Largest Number At Least Twice of Others *Easy* ) 题解分析" title="阅读次数"><span class="post-meta-item-icon"><i class="far fa-eye"></i> </span><span class="post-meta-item-text">阅读次数：</span> <span class="leancloud-visitors-count"></span> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-comment"></i> </span><span class="post-meta-item-text">Disqus：</span> <a title="disqus" href="/2022/10/02/Leetcode-747-%E8%87%B3%E5%B0%91%E6%98%AF%E5%85%B6%E4%BB%96%E6%95%B0%E5%AD%97%E4%B8%A4%E5%80%8D%E7%9A%84%E6%9C%80%E5%A4%A7%E6%95%B0-Largest-Number-At-Least-Twice-of-Others-Easy-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/#disqus_thread" itemprop="discussionUrl"><span class="post-comments-count disqus-comment-count" data-disqus-identifier="2022/10/02/Leetcode-747-至少是其他数字两倍的最大数-Largest-Number-At-Least-Twice-of-Others-Easy-题解分析/" itemprop="commentCount"></span></a></span></div></div></header><div class="post-body" itemprop="articleBody"><h3 id="题目介绍"><a href="#题目介绍" class="headerlink" title="题目介绍"></a>题目介绍</h3><p>You are given an integer array <code>nums</code> where the largest integer is <strong>unique</strong>.</p><p>Determine whether the largest element in the array is <strong>at least twice</strong> as much as every other number in the array. If it is, return the <code>index</code> of the largest element, or return <code>-1</code> otherwise.<br>确认在数组中的最大数是否是其余任意数的两倍大及以上，如果是返回索引，如果不是返回-1</p><h3 id="示例"><a href="#示例" class="headerlink" title="示例"></a>示例</h3><h4 id="Example-1"><a href="#Example-1" class="headerlink" title="Example 1:"></a>Example 1:</h4><blockquote><p><strong>Input:</strong> nums &#x3D; [3,6,1,0]<br><strong>Output:</strong> 1<br><strong>Explanation:</strong> 6 is the largest integer.<br>For every other number in the array x, 6 is at least twice as big as x.<br>The index of value 6 is 1, so we return 1.</p></blockquote><h3 id="Example-2"><a href="#Example-2" class="headerlink" title="Example 2:"></a>Example 2:</h3><blockquote><p><strong>Input:</strong> nums &#x3D; [1,2,3,4]<br><strong>Output:</strong> -1<br><strong>Explanation:</strong> 4 is less than twice the value of 3, so we return -1.</p></blockquote><h3 id="提示"><a href="#提示" class="headerlink" title="提示:"></a>提示:</h3><ul><li><code>2 &lt;= nums.length &lt;= 50</code></li><li><code>0 &lt;= nums[i] &lt;= 100</code></li><li>The largest element in <code>nums</code> is unique.</li></ul><h3 id="简要解析"><a href="#简要解析" class="headerlink" title="简要解析"></a>简要解析</h3><p>这个题easy是题意也比较简单，找最大值，并且最大值是其他任意值的两倍及以上，其实就是找最大值跟次大值，比较下就好了</p><h3 id="代码"><a href="#代码" class="headerlink" title="代码"></a>代码</h3><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">dominantIndex</span><span class="token punctuation">(</span><span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span> nums<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">int</span> largest <span class="token operator">=</span> <span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token constant">MIN_VALUE</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> second <span class="token operator">=</span> <span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token constant">MIN_VALUE</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> largestIndex <span class="token operator">=</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> nums<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">// 如果有最大的就更新，同时更新最大值和第二大的</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>nums<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">></span> largest<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
second <span class="token operator">=</span> largest<span class="token punctuation">;</span>
largest <span class="token operator">=</span> nums<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">;</span>
largestIndex <span class="token operator">=</span> i<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span>nums<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">></span> second<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">// 没有超过最大的，但是比第二大的更大就更新第二大的</span>
second <span class="token operator">=</span> nums<span class="token punctuation">[</span>i<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">// 判断下是否符合题目要求，要是所有值的两倍及以上</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>largest <span class="token operator">>=</span> <span class="token number">2</span> <span class="token operator">*</span> second<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">return</span> largestIndex<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 operator">-</span><span class="token number">1</span><span class="token punctuation">;</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></code></pre><h3 id="通过图"><a href="#通过图" class="headerlink" title="通过图"></a>通过图</h3><p>第一次错了是把第二大的情况只考虑第一种，也有可能最大值完全没经过替换就变成最大值了<br><img data-src="https://img.nicksxs.com/uPic/WechatIMG1065.png"></p></div><footer class="post-footer"><div class="post-eof"></div></footer></article></div><div class="post-block"><article itemscope itemtype="http://schema.org/Article" class="post-content"><link itemprop="mainEntityOfPage" href="https://nicksxs.me/2022/09/25/Disruptor-%E7%B3%BB%E5%88%97%E4%B8%89/"><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="undefined | Nicksxs's Blog"><meta itemprop="description" content=""></span><header class="post-header"><h2 class="post-title" itemprop="name headline"><a href="/2022/09/25/Disruptor-%E7%B3%BB%E5%88%97%E4%B8%89/" class="post-title-link" itemprop="url">Disruptor 系列三</a></h2><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：2022-09-25 21:17:28" itemprop="dateCreated datePublished" datetime="2022-09-25T21:17:28+08:00">2022-09-25</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/Java/" itemprop="url" rel="index"><span itemprop="name">Java</span></a> </span></span><span id="/2022/09/25/Disruptor-%E7%B3%BB%E5%88%97%E4%B8%89/" class="post-meta-item leancloud_visitors" data-flag-title="Disruptor 系列三" title="阅读次数"><span class="post-meta-item-icon"><i class="far fa-eye"></i> </span><span class="post-meta-item-text">阅读次数：</span> <span class="leancloud-visitors-count"></span> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-comment"></i> </span><span class="post-meta-item-text">Disqus：</span> <a title="disqus" href="/2022/09/25/Disruptor-%E7%B3%BB%E5%88%97%E4%B8%89/#disqus_thread" itemprop="discussionUrl"><span class="post-comments-count disqus-comment-count" data-disqus-identifier="2022/09/25/Disruptor-系列三/" itemprop="commentCount"></span></a></span></div></div></header><div class="post-body" itemprop="articleBody"><p>原来一直有点被误导，<br>gatingSequences用来标识每个 processer 的操作位点，但是怎么记录更新有点搞不清楚<br>其实问题在于 gatingSequences 是个 Sequence 数组，首先要看下怎么加进去的，<br>可以看到是在 <code>com.lmax.disruptor.RingBuffer#addGatingSequences</code> 这个方法里添加<br>首先是 <code>com.lmax.disruptor.dsl.Disruptor#handleEventsWith(com.lmax.disruptor.EventHandler&lt;? super T&gt;...)</code><br>然后执行 <code>com.lmax.disruptor.dsl.Disruptor#createEventProcessors(com.lmax.disruptor.Sequence[], com.lmax.disruptor.EventHandler&lt;? super T&gt;[])</code></p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name">EventHandlerGroup</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">T</span><span class="token punctuation">></span></span> <span class="token function">createEventProcessors</span><span class="token punctuation">(</span>
<span class="token keyword">final</span> <span class="token class-name">Sequence</span><span class="token punctuation">[</span><span class="token punctuation">]</span> barrierSequences<span class="token punctuation">,</span>
<span class="token keyword">final</span> <span class="token class-name">EventHandler</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span> <span class="token keyword">super</span> <span class="token class-name">T</span><span class="token punctuation">></span></span><span class="token punctuation">[</span><span class="token punctuation">]</span> eventHandlers<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token function">checkNotStarted</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">Sequence</span><span class="token punctuation">[</span><span class="token punctuation">]</span> processorSequences <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Sequence</span><span class="token punctuation">[</span>eventHandlers<span class="token punctuation">.</span>length<span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token keyword">final</span> <span class="token class-name">SequenceBarrier</span> barrier <span class="token operator">=</span> ringBuffer<span class="token punctuation">.</span><span class="token function">newBarrier</span><span class="token punctuation">(</span>barrierSequences<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> eventHandlersLength <span class="token operator">=</span> eventHandlers<span class="token punctuation">.</span>length<span class="token punctuation">;</span> i <span class="token operator">&lt;</span> eventHandlersLength<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token keyword">final</span> <span class="token class-name">EventHandler</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token operator">?</span> <span class="token keyword">super</span> <span class="token class-name">T</span><span class="token punctuation">></span></span> eventHandler <span class="token operator">=</span> eventHandlers<span class="token punctuation">[</span>i<span class="token punctuation">]</span><span class="token punctuation">;</span>
<span class="token comment">// 这里将 handler 包装成一个 BatchEventProcessor</span>
<span class="token keyword">final</span> <span class="token class-name">BatchEventProcessor</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">T</span><span class="token punctuation">></span></span> batchEventProcessor <span class="token operator">=</span>
<span class="token keyword">new</span> <span class="token class-name">BatchEventProcessor</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span>ringBuffer<span class="token punctuation">,</span> barrier<span class="token punctuation">,</span> eventHandler<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>exceptionHandler <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
batchEventProcessor<span class="token punctuation">.</span><span class="token function">setExceptionHandler</span><span class="token punctuation">(</span>exceptionHandler<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
consumerRepository<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span>batchEventProcessor<span class="token punctuation">,</span> eventHandler<span class="token punctuation">,</span> barrier<span class="token punctuation">)</span><span class="token punctuation">;</span>
processorSequences<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">=</span> batchEventProcessor<span class="token punctuation">.</span><span class="token function">getSequence</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 function">updateGatingSequencesForNextInChain</span><span class="token punctuation">(</span>barrierSequences<span class="token punctuation">,</span> processorSequences<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">EventHandlerGroup</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">,</span> consumerRepository<span class="token punctuation">,</span> processorSequences<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></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></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>在 <code>BatchEventProcessor</code> 在类内有个定义 sequence</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token keyword">final</span> <span class="token class-name">Sequence</span> sequence <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Sequence</span><span class="token punctuation">(</span><span class="token class-name">Sequencer</span><span class="token punctuation">.</span><span class="token constant">INITIAL_CURSOR_VALUE</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre><p>然后在上面循环中的这一句取出来</p><pre class="line-numbers language-java" data-language="java"><code class="language-java">processorSequences<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">=</span> batchEventProcessor<span class="token punctuation">.</span><span class="token function">getSequence</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span><span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre><p>调用<code>com.lmax.disruptor.dsl.Disruptor#updateGatingSequencesForNextInChain</code> 方法</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">updateGatingSequencesForNextInChain</span><span class="token punctuation">(</span><span class="token keyword">final</span> <span class="token class-name">Sequence</span><span class="token punctuation">[</span><span class="token punctuation">]</span> barrierSequences<span class="token punctuation">,</span> <span class="token keyword">final</span> <span class="token class-name">Sequence</span><span class="token punctuation">[</span><span class="token punctuation">]</span> processorSequences<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>processorSequences<span class="token punctuation">.</span>length <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 comment">// 然后在这里添加</span>
ringBuffer<span class="token punctuation">.</span><span class="token function">addGatingSequences</span><span class="token punctuation">(</span>processorSequences<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">final</span> <span class="token class-name">Sequence</span> barrierSequence <span class="token operator">:</span> barrierSequences<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
ringBuffer<span class="token punctuation">.</span><span class="token function">removeGatingSequence</span><span class="token punctuation">(</span>barrierSequence<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
consumerRepository<span class="token punctuation">.</span><span class="token function">unMarkEventProcessorsAsEndOfChain</span><span class="token punctuation">(</span>barrierSequences<span class="token punctuation">)</span><span class="token punctuation">;</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></code></pre><p>而如何更新则是在处理器 <code>com.lmax.disruptor.BatchEventProcessor#run</code> 中</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><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 keyword">if</span> <span class="token punctuation">(</span>running<span class="token punctuation">.</span><span class="token function">compareAndSet</span><span class="token punctuation">(</span><span class="token constant">IDLE</span><span class="token punctuation">,</span> <span class="token constant">RUNNING</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
sequenceBarrier<span class="token punctuation">.</span><span class="token function">clearAlert</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token function">notifyStart</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">if</span> <span class="token punctuation">(</span>running<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token constant">RUNNING</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token function">processEvents</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">finally</span>
<span class="token punctuation">&#123;</span>
<span class="token function">notifyShutdown</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
running<span class="token punctuation">.</span><span class="token function">set</span><span class="token punctuation">(</span><span class="token constant">IDLE</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">else</span>
<span class="token punctuation">&#123;</span>
<span class="token comment">// This is a little bit of guess work. The running state could of changed to HALTED by</span>
<span class="token comment">// this point. However, Java does not have compareAndExchange which is the only way</span>
<span class="token comment">// to get it exactly correct.</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>running<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token constant">RUNNING</span><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">IllegalStateException</span><span class="token punctuation">(</span><span class="token string">"Thread is already running"</span><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 function">earlyExit</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 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></code></pre><p>然后是</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">processEvents</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token class-name">T</span> event <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token keyword">long</span> nextSequence <span class="token operator">=</span> sequence<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token number">1L</span><span class="token punctuation">;</span>
<span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token boolean">true</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">final</span> <span class="token keyword">long</span> availableSequence <span class="token operator">=</span> sequenceBarrier<span class="token punctuation">.</span><span class="token function">waitFor</span><span class="token punctuation">(</span>nextSequence<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>batchStartAware <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
batchStartAware<span class="token punctuation">.</span><span class="token function">onBatchStart</span><span class="token punctuation">(</span>availableSequence <span class="token operator">-</span> nextSequence <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">while</span> <span class="token punctuation">(</span>nextSequence <span class="token operator">&lt;=</span> availableSequence<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
event <span class="token operator">=</span> dataProvider<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>nextSequence<span class="token punctuation">)</span><span class="token punctuation">;</span>
eventHandler<span class="token punctuation">.</span><span class="token function">onEvent</span><span class="token punctuation">(</span>event<span class="token punctuation">,</span> nextSequence<span class="token punctuation">,</span> nextSequence <span class="token operator">==</span> availableSequence<span class="token punctuation">)</span><span class="token punctuation">;</span>
nextSequence<span class="token operator">++</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 如果正常处理完，那就是会更新为 availableSequence，因为都处理好了</span>
sequence<span class="token punctuation">.</span><span class="token function">set</span><span class="token punctuation">(</span>availableSequence<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 keyword">final</span> <span class="token class-name">TimeoutException</span> e<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token function">notifyTimeout</span><span class="token punctuation">(</span>sequence<span class="token punctuation">.</span><span class="token function">get</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 keyword">final</span> <span class="token class-name">AlertException</span> ex<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>running<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">!=</span> <span class="token constant">RUNNING</span><span class="token punctuation">)</span>
<span class="token punctuation">&#123;</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">catch</span> <span class="token punctuation">(</span><span class="token keyword">final</span> <span class="token class-name">Throwable</span> ex<span class="token punctuation">)</span>
<span class="token punctuation">&#123;</span>
<span class="token function">handleEventException</span><span class="token punctuation">(</span>ex<span class="token punctuation">,</span> nextSequence<span class="token punctuation">,</span> event<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 如果是异常就只是 nextSequence</span>
sequence<span class="token punctuation">.</span><span class="token function">set</span><span class="token punctuation">(</span>nextSequence<span class="token punctuation">)</span><span class="token punctuation">;</span>
nextSequence<span class="token operator">++</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></code></pre></div><footer class="post-footer"><div class="post-eof"></div></footer></article></div><div class="post-block"><article itemscope itemtype="http://schema.org/Article" class="post-content"><link itemprop="mainEntityOfPage" href="https://nicksxs.me/2022/09/18/Apollo-%E5%AE%A2%E6%88%B7%E7%AB%AF%E5%90%AF%E5%8A%A8%E8%BF%87%E7%A8%8B%E5%88%86%E6%9E%90/"><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="undefined | Nicksxs's Blog"><meta itemprop="description" content=""></span><header class="post-header"><h2 class="post-title" itemprop="name headline"><a href="/2022/09/18/Apollo-%E5%AE%A2%E6%88%B7%E7%AB%AF%E5%90%AF%E5%8A%A8%E8%BF%87%E7%A8%8B%E5%88%86%E6%9E%90/" class="post-title-link" itemprop="url">Apollo 客户端启动过程分析</a></h2><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：2022-09-18 21:15:12" itemprop="dateCreated datePublished" datetime="2022-09-18T21:15:12+08:00">2022-09-18</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/Java/" itemprop="url" rel="index"><span itemprop="name">Java</span></a> </span></span><span id="/2022/09/18/Apollo-%E5%AE%A2%E6%88%B7%E7%AB%AF%E5%90%AF%E5%8A%A8%E8%BF%87%E7%A8%8B%E5%88%86%E6%9E%90/" class="post-meta-item leancloud_visitors" data-flag-title="Apollo 客户端启动过程分析" title="阅读次数"><span class="post-meta-item-icon"><i class="far fa-eye"></i> </span><span class="post-meta-item-text">阅读次数：</span> <span class="leancloud-visitors-count"></span> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-comment"></i> </span><span class="post-meta-item-text">Disqus：</span> <a title="disqus" href="/2022/09/18/Apollo-%E5%AE%A2%E6%88%B7%E7%AB%AF%E5%90%AF%E5%8A%A8%E8%BF%87%E7%A8%8B%E5%88%86%E6%9E%90/#disqus_thread" itemprop="discussionUrl"><span class="post-comments-count disqus-comment-count" data-disqus-identifier="2022/09/18/Apollo-客户端启动过程分析/" itemprop="commentCount"></span></a></span></div></div></header><div class="post-body" itemprop="articleBody"><p>入口是可以在 springboot 的启动类上打上<code>EnableApolloConfig</code>注解</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token annotation punctuation">@Import</span><span class="token punctuation">(</span><span class="token class-name">ApolloConfigRegistrar</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token annotation punctuation">@interface</span> <span class="token class-name">EnableApolloConfig</span> <span class="token punctuation">&#123;</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span></span></code></pre><p>这个 import 实现了</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">ApolloConfigRegistrar</span> <span class="token keyword">implements</span> <span class="token class-name">ImportBeanDefinitionRegistrar</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">private</span> <span class="token class-name">ApolloConfigRegistrarHelper</span> helper <span class="token operator">=</span> <span class="token class-name">ServiceBootstrap</span><span class="token punctuation">.</span><span class="token function">loadPrimary</span><span class="token punctuation">(</span><span class="token class-name">ApolloConfigRegistrarHelper</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 annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">registerBeanDefinitions</span><span class="token punctuation">(</span><span class="token class-name">AnnotationMetadata</span> importingClassMetadata<span class="token punctuation">,</span> <span class="token class-name">BeanDefinitionRegistry</span> registry<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
helper<span class="token punctuation">.</span><span class="token function">registerBeanDefinitions</span><span class="token punctuation">(</span>importingClassMetadata<span class="token punctuation">,</span> registry<span class="token punctuation">)</span><span class="token punctuation">;</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></code></pre><p>然后就调用了</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>spring<span class="token punctuation">.</span>spi<span class="token punctuation">.</span></span>DefaultApolloConfigRegistrarHelper</span>#registerBeanDefinitions<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre><p>接着是注册了这个 bean，com.ctrip.framework.apollo.spring.config.PropertySourcesProcessor</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 keyword">void</span> <span class="token function">registerBeanDefinitions</span><span class="token punctuation">(</span><span class="token class-name">AnnotationMetadata</span> importingClassMetadata<span class="token punctuation">,</span> <span class="token class-name">BeanDefinitionRegistry</span> registry<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">AnnotationAttributes</span> attributes <span class="token operator">=</span> <span class="token class-name">AnnotationAttributes</span>
<span class="token punctuation">.</span><span class="token function">fromMap</span><span class="token punctuation">(</span>importingClassMetadata<span class="token punctuation">.</span><span class="token function">getAnnotationAttributes</span><span class="token punctuation">(</span><span class="token class-name">EnableApolloConfig</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getName</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">;</span>
<span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> namespaces <span class="token operator">=</span> attributes<span class="token punctuation">.</span><span class="token function">getStringArray</span><span class="token punctuation">(</span><span class="token string">"value"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> order <span class="token operator">=</span> attributes<span class="token punctuation">.</span><span class="token function">getNumber</span><span class="token punctuation">(</span><span class="token string">"order"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">PropertySourcesProcessor</span><span class="token punctuation">.</span><span class="token function">addNamespaces</span><span class="token punctuation">(</span><span class="token class-name">Lists</span><span class="token punctuation">.</span><span class="token function">newArrayList</span><span class="token punctuation">(</span>namespaces<span class="token punctuation">)</span><span class="token punctuation">,</span> order<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Map</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">Object</span><span class="token punctuation">></span></span> propertySourcesPlaceholderPropertyValues <span class="token operator">=</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 punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// to make sure the default PropertySourcesPlaceholderConfigurer's priority is higher than PropertyPlaceholderConfigurer</span>
propertySourcesPlaceholderPropertyValues<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span><span class="token string">"order"</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 class-name">BeanRegistrationUtil</span><span class="token punctuation">.</span><span class="token function">registerBeanDefinitionIfNotExists</span><span class="token punctuation">(</span>registry<span class="token punctuation">,</span> <span class="token class-name">PropertySourcesPlaceholderConfigurer</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token class-name">PropertySourcesPlaceholderConfigurer</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">,</span> propertySourcesPlaceholderPropertyValues<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 注册了这个 bean</span>
<span class="token class-name">BeanRegistrationUtil</span><span class="token punctuation">.</span><span class="token function">registerBeanDefinitionIfNotExists</span><span class="token punctuation">(</span>registry<span class="token punctuation">,</span> <span class="token class-name">PropertySourcesProcessor</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">.</span><span class="token function">getName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token class-name">PropertySourcesProcessor</span><span class="token punctuation">.</span><span class="token keyword">class</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></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><p>而com.ctrip.framework.apollo.spring.config.PropertySourcesProcessor 实现了 org.springframework.beans.factory.config.BeanFactoryPostProcessor<br>它里面的 com.ctrip.framework.apollo.spring.config.PropertySourcesProcessor#postProcessBeanFactory 方法就会被 spring 调用，</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">private</span> <span class="token keyword">void</span> <span class="token function">initializePropertySources</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>environment<span class="token punctuation">.</span><span class="token function">getPropertySources</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">contains</span><span class="token punctuation">(</span><span class="token class-name">PropertySourcesConstants</span><span class="token punctuation">.</span><span class="token constant">APOLLO_PROPERTY_SOURCE_NAME</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">//already initialized</span>
<span class="token keyword">return</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">CompositePropertySource</span> composite <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CompositePropertySource</span><span class="token punctuation">(</span><span class="token class-name">PropertySourcesConstants</span><span class="token punctuation">.</span><span class="token constant">APOLLO_PROPERTY_SOURCE_NAME</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//sort by order asc</span>
<span class="token class-name">ImmutableSortedSet</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Integer</span><span class="token punctuation">></span></span> orders <span class="token operator">=</span> <span class="token class-name">ImmutableSortedSet</span><span class="token punctuation">.</span><span class="token function">copyOf</span><span class="token punctuation">(</span><span class="token constant">NAMESPACE_NAMES</span><span class="token punctuation">.</span><span class="token function">keySet</span><span class="token punctuation">(</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">Integer</span><span class="token punctuation">></span></span> iterator <span class="token operator">=</span> orders<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>iterator<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 keyword">int</span> order <span class="token operator">=</span> iterator<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">for</span> <span class="token punctuation">(</span><span class="token class-name">String</span> namespace <span class="token operator">:</span> <span class="token constant">NAMESPACE_NAMES</span><span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>order<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">// 这里获取每个 namespace 的配置</span>
<span class="token class-name">Config</span> config <span class="token operator">=</span> <span class="token class-name">ConfigService</span><span class="token punctuation">.</span><span class="token function">getConfig</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
composite<span class="token punctuation">.</span><span class="token function">addPropertySource</span><span class="token punctuation">(</span>configPropertySourceFactory<span class="token punctuation">.</span><span class="token function">getConfigPropertySource</span><span class="token punctuation">(</span>namespace<span class="token punctuation">,</span> config<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 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>然后是 com.ctrip.framework.apollo.ConfigService#getConfig<br>接着就是它<br>com.ctrip.framework.apollo.internals.DefaultConfigManager#getConfig</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">Config</span> <span class="token function">getConfig</span><span class="token punctuation">(</span><span class="token class-name">String</span> namespace<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Config</span> config <span class="token operator">=</span> m_configs<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>config <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">synchronized</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
config <span class="token operator">=</span> m_configs<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>config <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">ConfigFactory</span> factory <span class="token operator">=</span> m_factoryManager<span class="token punctuation">.</span><span class="token function">getFactory</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 通过 factory 来创建配置获取</span>
config <span class="token operator">=</span> factory<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
m_configs<span class="token punctuation">.</span><span class="token function">put</span><span class="token punctuation">(</span>namespace<span class="token punctuation">,</span> config<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></code></pre><p>创建配置</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>spi<span class="token punctuation">.</span></span>DefaultConfigFactory</span>#create
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">public</span> <span class="token class-name">Config</span> <span class="token function">create</span><span class="token punctuation">(</span><span class="token class-name">String</span> namespace<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">ConfigFileFormat</span> format <span class="token operator">=</span> <span class="token function">determineFileFormat</span><span class="token punctuation">(</span>namespace<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">ConfigFileFormat</span><span class="token punctuation">.</span><span class="token function">isPropertiesCompatible</span><span class="token punctuation">(</span>format<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">new</span> <span class="token class-name">DefaultConfig</span><span class="token punctuation">(</span>namespace<span class="token punctuation">,</span> <span class="token function">createPropertiesCompatibleFileConfigRepository</span><span class="token punctuation">(</span>namespace<span class="token punctuation">,</span> format<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 调用到这</span>
<span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">DefaultConfig</span><span class="token punctuation">(</span>namespace<span class="token punctuation">,</span> <span class="token function">createLocalConfigRepository</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><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></span><span></span><span></span></span></code></pre><p>然后</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name">LocalFileConfigRepository</span> <span class="token function">createLocalConfigRepository</span><span class="token punctuation">(</span><span class="token class-name">String</span> namespace<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>m_configUtil<span class="token punctuation">.</span><span class="token function">isInLocalMode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
logger<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span>
<span class="token string">"==== Apollo is in local mode! Won't pull configs from remote server for namespace &#123;&#125; ! ===="</span><span class="token punctuation">,</span>
namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">LocalFileConfigRepository</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 正常会走这个，因为要从配置中心获取</span>
<span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">LocalFileConfigRepository</span><span class="token punctuation">(</span>namespace<span class="token punctuation">,</span> <span class="token function">createRemoteConfigRepository</span><span class="token punctuation">(</span>namespace<span class="token punctuation">)</span><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></span><span></span><span></span></span></code></pre><p>然后是创建远程配置仓库</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>spi<span class="token punctuation">.</span></span>DefaultConfigFactory</span>#createRemoteConfigRepository
<span class="token class-name">RemoteConfigRepository</span> <span class="token function">createRemoteConfigRepository</span><span class="token punctuation">(</span><span class="token class-name">String</span> namespace<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">return</span> <span class="token keyword">new</span> <span class="token class-name">RemoteConfigRepository</span><span class="token punctuation">(</span>namespace<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></code></pre><p>继续对当前的 namespace 创建远程配置仓库</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>RemoteConfigRepository</span>#<span class="token class-name">RemoteConfigRepository</span>
<span class="token keyword">public</span> <span class="token class-name">RemoteConfigRepository</span><span class="token punctuation">(</span><span class="token class-name">String</span> namespace<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
m_namespace <span class="token operator">=</span> namespace<span class="token punctuation">;</span>
m_configCache <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">AtomicReference</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_configUtil <span class="token operator">=</span> <span class="token class-name">ApolloInjector</span><span class="token punctuation">.</span><span class="token function">getInstance</span><span class="token punctuation">(</span><span class="token class-name">ConfigUtil</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_httpUtil <span class="token operator">=</span> <span class="token class-name">ApolloInjector</span><span class="token punctuation">.</span><span class="token function">getInstance</span><span class="token punctuation">(</span><span class="token class-name">HttpUtil</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_serviceLocator <span class="token operator">=</span> <span class="token class-name">ApolloInjector</span><span class="token punctuation">.</span><span class="token function">getInstance</span><span class="token punctuation">(</span><span class="token class-name">ConfigServiceLocator</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
remoteConfigLongPollService <span class="token operator">=</span> <span class="token class-name">ApolloInjector</span><span class="token punctuation">.</span><span class="token function">getInstance</span><span class="token punctuation">(</span><span class="token class-name">RemoteConfigLongPollService</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_longPollServiceDto <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">AtomicReference</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_remoteMessages <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">AtomicReference</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">></span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_loadConfigRateLimiter <span class="token operator">=</span> <span class="token class-name">RateLimiter</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>m_configUtil<span class="token punctuation">.</span><span class="token function">getLoadConfigQPS</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_configNeedForceRefresh <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">AtomicBoolean</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_loadConfigFailSchedulePolicy <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ExponentialSchedulePolicy</span><span class="token punctuation">(</span>m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryInterval</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryInterval</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
gson <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Gson</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 尝试同步</span>
<span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">trySync</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">schedulePeriodicRefresh</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">scheduleLongPollingRefresh</span><span class="token punctuation">(</span><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></span><span></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>然后是同步配置，下面的日志异常经常可以看到，比如配置拉取地址不通</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>AbstractConfigRepository</span>#trySync
<span class="token keyword">protected</span> <span class="token keyword">boolean</span> <span class="token function">trySync</span><span class="token punctuation">(</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 function">sync</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 boolean">true</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">Throwable</span> ex<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">logEvent</span><span class="token punctuation">(</span><span class="token string">"ApolloConfigException"</span><span class="token punctuation">,</span> <span class="token class-name">ExceptionUtil</span><span class="token punctuation">.</span><span class="token function">getDetailMessage</span><span class="token punctuation">(</span>ex<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
logger
<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span><span class="token string">"Sync config failed, will retry. Repository &#123;&#125;, reason: &#123;&#125;"</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getClass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token class-name">ExceptionUtil</span>
<span class="token punctuation">.</span><span class="token function">getDetailMessage</span><span class="token punctuation">(</span>ex<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">return</span> <span class="token boolean">false</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></code></pre><p>实际的同步方法，加了<code>synchronized</code>锁，</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>RemoteConfigRepository</span>#sync
<span class="token annotation punctuation">@Override</span>
<span class="token keyword">protected</span> <span class="token keyword">synchronized</span> <span class="token keyword">void</span> <span class="token function">sync</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Transaction</span> transaction <span class="token operator">=</span> <span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">newTransaction</span><span class="token punctuation">(</span><span class="token string">"Apollo.ConfigService"</span><span class="token punctuation">,</span> <span class="token string">"syncRemoteConfig"</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 comment">// 获取本地配置</span>
<span class="token class-name">ApolloConfig</span> previous <span class="token operator">=</span> m_configCache<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// 获取配置</span>
<span class="token class-name">ApolloConfig</span> current <span class="token operator">=</span> <span class="token function">loadApolloConfig</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//reference equals means HTTP 304</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>previous <span class="token operator">!=</span> current<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">"Remote Config refreshed!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_configCache<span class="token punctuation">.</span><span class="token function">set</span><span class="token punctuation">(</span>current<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">fireRepositoryChange</span><span class="token punctuation">(</span>m_namespace<span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">getConfig</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">if</span> <span class="token punctuation">(</span>current <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">Tracer</span><span class="token punctuation">.</span><span class="token function">logEvent</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">format</span><span class="token punctuation">(</span><span class="token string">"Apollo.Client.Configs.%s"</span><span class="token punctuation">,</span> current<span class="token punctuation">.</span><span class="token function">getNamespaceName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
current<span class="token punctuation">.</span><span class="token function">getReleaseKey</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>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span><span class="token class-name">Transaction</span><span class="token punctuation">.</span><span class="token constant">SUCCESS</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">Throwable</span> ex<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span>ex<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">throw</span> ex<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">finally</span> <span class="token punctuation">&#123;</span>
transaction<span class="token punctuation">.</span><span class="token function">complete</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 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></code></pre><p>然后走到这</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>RemoteConfigRepository</span>#loadApolloConfig
<span class="token keyword">private</span> <span class="token class-name">ApolloConfig</span> <span class="token function">loadApolloConfig</span><span class="token punctuation">(</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 operator">!</span>m_loadConfigRateLimiter<span class="token punctuation">.</span><span class="token function">tryAcquire</span><span class="token punctuation">(</span><span class="token number">5</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 punctuation">&#123;</span>
<span class="token comment">//wait at most 5 seconds</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</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 function">sleep</span><span class="token punctuation">(</span><span class="token number">5</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">InterruptedException</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">String</span> appId <span class="token operator">=</span> m_configUtil<span class="token punctuation">.</span><span class="token function">getAppId</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> cluster <span class="token operator">=</span> m_configUtil<span class="token punctuation">.</span><span class="token function">getCluster</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> dataCenter <span class="token operator">=</span> m_configUtil<span class="token punctuation">.</span><span class="token function">getDataCenter</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">logEvent</span><span class="token punctuation">(</span><span class="token string">"Apollo.Client.ConfigMeta"</span><span class="token punctuation">,</span> <span class="token constant">STRING_JOINER</span><span class="token punctuation">.</span><span class="token function">join</span><span class="token punctuation">(</span>appId<span class="token punctuation">,</span> cluster<span class="token punctuation">,</span> m_namespace<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> maxRetries <span class="token operator">=</span> m_configNeedForceRefresh<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">2</span> <span class="token operator">:</span> <span class="token number">1</span><span class="token punctuation">;</span>
<span class="token keyword">long</span> onErrorSleepTime <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token comment">// 0 means no sleep</span>
<span class="token class-name">Throwable</span> exception <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token comment">// 获取配置</span>
<span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ServiceDTO</span><span class="token punctuation">></span></span> configServices <span class="token operator">=</span> <span class="token function">getConfigServices</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">String</span> url <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> maxRetries<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ServiceDTO</span><span class="token punctuation">></span></span> randomConfigServices <span class="token operator">=</span> <span class="token class-name">Lists</span><span class="token punctuation">.</span><span class="token function">newLinkedList</span><span class="token punctuation">(</span>configServices<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Collections</span><span class="token punctuation">.</span><span class="token function">shuffle</span><span class="token punctuation">(</span>randomConfigServices<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//Access the server which notifies the client first</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>m_longPollServiceDto<span class="token punctuation">.</span><span class="token function">get</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>
randomConfigServices<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> m_longPollServiceDto<span class="token punctuation">.</span><span class="token function">getAndSet</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 punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token class-name">ServiceDTO</span> configService <span class="token operator">:</span> randomConfigServices<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>onErrorSleepTime <span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
logger<span class="token punctuation">.</span><span class="token function">warn</span><span class="token punctuation">(</span>
<span class="token string">"Load config failed, will retry in &#123;&#125; &#123;&#125;. appId: &#123;&#125;, cluster: &#123;&#125;, namespaces: &#123;&#125;"</span><span class="token punctuation">,</span>
onErrorSleepTime<span class="token punctuation">,</span> m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryIntervalTimeUnit</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> appId<span class="token punctuation">,</span> cluster<span class="token punctuation">,</span> m_namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">try</span> <span class="token punctuation">&#123;</span>
m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryIntervalTimeUnit</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span>onErrorSleepTime<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">InterruptedException</span> e<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">//ignore</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
url <span class="token operator">=</span> <span class="token function">assembleQueryConfigUrl</span><span class="token punctuation">(</span>configService<span class="token punctuation">.</span><span class="token function">getHomepageUrl</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> appId<span class="token punctuation">,</span> cluster<span class="token punctuation">,</span> m_namespace<span class="token punctuation">,</span>
dataCenter<span class="token punctuation">,</span> m_remoteMessages<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> m_configCache<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">"Loading config from &#123;&#125;"</span><span class="token punctuation">,</span> url<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">HttpRequest</span> request <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpRequest</span><span class="token punctuation">(</span>url<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">Transaction</span> transaction <span class="token operator">=</span> <span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">newTransaction</span><span class="token punctuation">(</span><span class="token string">"Apollo.ConfigService"</span><span class="token punctuation">,</span> <span class="token string">"queryConfig"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">addData</span><span class="token punctuation">(</span><span class="token string">"Url"</span><span class="token punctuation">,</span> url<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 class-name">HttpResponse</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ApolloConfig</span><span class="token punctuation">></span></span> response <span class="token operator">=</span> m_httpUtil<span class="token punctuation">.</span><span class="token function">doGet</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> <span class="token class-name">ApolloConfig</span><span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_configNeedForceRefresh<span class="token punctuation">.</span><span class="token function">set</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
m_loadConfigFailSchedulePolicy<span class="token punctuation">.</span><span class="token function">success</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">addData</span><span class="token punctuation">(</span><span class="token string">"StatusCode"</span><span class="token punctuation">,</span> response<span class="token punctuation">.</span><span class="token function">getStatusCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span><span class="token class-name">Transaction</span><span class="token punctuation">.</span><span class="token constant">SUCCESS</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>response<span class="token punctuation">.</span><span class="token function">getStatusCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token number">304</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">"Config server responds with 304 HTTP status code."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> m_configCache<span class="token punctuation">.</span><span class="token function">get</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 class-name">ApolloConfig</span> result <span class="token operator">=</span> response<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>
logger<span class="token punctuation">.</span><span class="token function">debug</span><span class="token punctuation">(</span><span class="token string">"Loaded config for &#123;&#125;: &#123;&#125;"</span><span class="token punctuation">,</span> m_namespace<span class="token punctuation">,</span> result<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> result<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">ApolloConfigStatusCodeException</span> ex<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">ApolloConfigStatusCodeException</span> statusCodeException <span class="token operator">=</span> ex<span class="token punctuation">;</span>
<span class="token comment">//config not found</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>ex<span class="token punctuation">.</span><span class="token function">getStatusCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">==</span> <span class="token number">404</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> message <span class="token operator">=</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">format</span><span class="token punctuation">(</span>
<span class="token string">"Could not find config for namespace - appId: %s, cluster: %s, namespace: %s, "</span> <span class="token operator">+</span>
<span class="token string">"please check whether the configs are released in Apollo!"</span><span class="token punctuation">,</span>
appId<span class="token punctuation">,</span> cluster<span class="token punctuation">,</span> m_namespace<span class="token punctuation">)</span><span class="token punctuation">;</span>
statusCodeException <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ApolloConfigStatusCodeException</span><span class="token punctuation">(</span>ex<span class="token punctuation">.</span><span class="token function">getStatusCode</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
message<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">logEvent</span><span class="token punctuation">(</span><span class="token string">"ApolloConfigException"</span><span class="token punctuation">,</span> <span class="token class-name">ExceptionUtil</span><span class="token punctuation">.</span><span class="token function">getDetailMessage</span><span class="token punctuation">(</span>statusCodeException<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span>statusCodeException<span class="token punctuation">)</span><span class="token punctuation">;</span>
exception <span class="token operator">=</span> statusCodeException<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> ex<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">logEvent</span><span class="token punctuation">(</span><span class="token string">"ApolloConfigException"</span><span class="token punctuation">,</span> <span class="token class-name">ExceptionUtil</span><span class="token punctuation">.</span><span class="token function">getDetailMessage</span><span class="token punctuation">(</span>ex<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span>ex<span class="token punctuation">)</span><span class="token punctuation">;</span>
exception <span class="token operator">=</span> ex<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">finally</span> <span class="token punctuation">&#123;</span>
transaction<span class="token punctuation">.</span><span class="token function">complete</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 comment">// if force refresh, do normal sleep, if normal config load, do exponential sleep</span>
onErrorSleepTime <span class="token operator">=</span> m_configNeedForceRefresh<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">?</span> m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryInterval</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">:</span>
m_loadConfigFailSchedulePolicy<span class="token punctuation">.</span><span class="token function">fail</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> message <span class="token operator">=</span> <span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">format</span><span class="token punctuation">(</span>
<span class="token string">"Load Apollo Config failed - appId: %s, cluster: %s, namespace: %s, url: %s"</span><span class="token punctuation">,</span>
appId<span class="token punctuation">,</span> cluster<span class="token punctuation">,</span> m_namespace<span class="token punctuation">,</span> url<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">ApolloConfigException</span><span class="token punctuation">(</span>message<span class="token punctuation">,</span> exception<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></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></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><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>RemoteConfigRepository</span>#getConfigServices
<span class="token keyword">private</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ServiceDTO</span><span class="token punctuation">></span></span> <span class="token function">getConfigServices</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ServiceDTO</span><span class="token punctuation">></span></span> services <span class="token operator">=</span> m_serviceLocator<span class="token punctuation">.</span><span class="token function">getConfigServices</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>services<span class="token punctuation">.</span><span class="token function">size</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">throw</span> <span class="token keyword">new</span> <span class="token class-name">ApolloConfigException</span><span class="token punctuation">(</span><span class="token string">"No available config service"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> services<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></code></pre><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>ConfigServiceLocator</span>#getConfigServices
<span class="token keyword">public</span> <span class="token class-name">List</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">ServiceDTO</span><span class="token punctuation">></span></span> <span class="token function">getConfigServices</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>m_configServices<span class="token punctuation">.</span><span class="token function">get</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>
<span class="token function">updateConfigServices</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">return</span> m_configServices<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><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></span></span></code></pre><p>更新配置服务</p><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token class-name"><span class="token namespace">com<span class="token punctuation">.</span>ctrip<span class="token punctuation">.</span>framework<span class="token punctuation">.</span>apollo<span class="token punctuation">.</span>internals<span class="token punctuation">.</span></span>ConfigServiceLocator</span>#updateConfigServices
<span class="token keyword">private</span> <span class="token keyword">synchronized</span> <span class="token keyword">void</span> <span class="token function">updateConfigServices</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">String</span> url <span class="token operator">=</span> <span class="token function">assembleMetaServiceUrl</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token class-name">HttpRequest</span> request <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">HttpRequest</span><span class="token punctuation">(</span>url<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> maxRetries <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">;</span>
<span class="token class-name">Throwable</span> exception <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator">&lt;</span> maxRetries<span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Transaction</span> transaction <span class="token operator">=</span> <span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">newTransaction</span><span class="token punctuation">(</span><span class="token string">"Apollo.MetaService"</span><span class="token punctuation">,</span> <span class="token string">"getConfigService"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">addData</span><span class="token punctuation">(</span><span class="token string">"Url"</span><span class="token punctuation">,</span> url<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 comment">// 发起 http 请求获取配置</span>
<span class="token class-name">HttpResponse</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">List</span><span class="token punctuation">&lt;</span><span class="token class-name">ServiceDTO</span><span class="token punctuation">></span><span class="token punctuation">></span></span> response <span class="token operator">=</span> m_httpUtil<span class="token punctuation">.</span><span class="token function">doGet</span><span class="token punctuation">(</span>request<span class="token punctuation">,</span> m_responseType<span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span><span class="token class-name">Transaction</span><span class="token punctuation">.</span><span class="token constant">SUCCESS</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">ServiceDTO</span><span class="token punctuation">></span></span> services <span class="token operator">=</span> response<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>
<span class="token keyword">if</span> <span class="token punctuation">(</span>services <span class="token operator">==</span> <span class="token keyword">null</span> <span class="token operator">||</span> services<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 function">logConfigService</span><span class="token punctuation">(</span><span class="token string">"Empty response!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">continue</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token function">setConfigServices</span><span class="token punctuation">(</span>services<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</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">Throwable</span> ex<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token class-name">Tracer</span><span class="token punctuation">.</span><span class="token function">logEvent</span><span class="token punctuation">(</span><span class="token string">"ApolloConfigException"</span><span class="token punctuation">,</span> <span class="token class-name">ExceptionUtil</span><span class="token punctuation">.</span><span class="token function">getDetailMessage</span><span class="token punctuation">(</span>ex<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
transaction<span class="token punctuation">.</span><span class="token function">setStatus</span><span class="token punctuation">(</span>ex<span class="token punctuation">)</span><span class="token punctuation">;</span>
exception <span class="token operator">=</span> ex<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span> <span class="token keyword">finally</span> <span class="token punctuation">&#123;</span>
transaction<span class="token punctuation">.</span><span class="token function">complete</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">try</span> <span class="token punctuation">&#123;</span>
m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryIntervalTimeUnit</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">sleep</span><span class="token punctuation">(</span>m_configUtil<span class="token punctuation">.</span><span class="token function">getOnErrorRetryInterval</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">InterruptedException</span> ex<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token comment">//ignore</span>
<span class="token punctuation">&#125;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">throw</span> <span class="token keyword">new</span> <span class="token class-name">ApolloConfigException</span><span class="token punctuation">(</span>
<span class="token class-name">String</span><span class="token punctuation">.</span><span class="token function">format</span><span class="token punctuation">(</span><span class="token string">"Get config services failed from %s"</span><span class="token punctuation">,</span> url<span class="token punctuation">)</span><span class="token punctuation">,</span> exception<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></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></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></div><footer class="post-footer"><div class="post-eof"></div></footer></article></div><div class="post-block"><article itemscope itemtype="http://schema.org/Article" class="post-content"><link itemprop="mainEntityOfPage" href="https://nicksxs.me/2022/09/11/Leetcode-1862-%E5%90%91%E4%B8%8B%E5%8F%96%E6%95%B4%E6%95%B0%E5%AF%B9%E5%92%8C-Sum-of-Floored-Pairs-Hard-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/"><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="undefined | Nicksxs's Blog"><meta itemprop="description" content=""></span><header class="post-header"><h2 class="post-title" itemprop="name headline"><a href="/2022/09/11/Leetcode-1862-%E5%90%91%E4%B8%8B%E5%8F%96%E6%95%B4%E6%95%B0%E5%AF%B9%E5%92%8C-Sum-of-Floored-Pairs-Hard-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/" class="post-title-link" itemprop="url">Leetcode 1862 向下取整数对和 ( Sum of Floored Pairs *Hard* ) 题解分析</a></h2><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：2022-09-11 22:28:00" itemprop="dateCreated datePublished" datetime="2022-09-11T22:28:00+08:00">2022-09-11</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/Java/" itemprop="url" rel="index"><span itemprop="name">Java</span></a> </span>， <span itemprop="about" itemscope itemtype="http://schema.org/Thing"><a href="/categories/Java/leetcode/" itemprop="url" rel="index"><span itemprop="name">leetcode</span></a> </span></span><span id="/2022/09/11/Leetcode-1862-%E5%90%91%E4%B8%8B%E5%8F%96%E6%95%B4%E6%95%B0%E5%AF%B9%E5%92%8C-Sum-of-Floored-Pairs-Hard-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/" class="post-meta-item leancloud_visitors" data-flag-title="Leetcode 1862 向下取整数对和 ( Sum of Floored Pairs *Hard* ) 题解分析" title="阅读次数"><span class="post-meta-item-icon"><i class="far fa-eye"></i> </span><span class="post-meta-item-text">阅读次数：</span> <span class="leancloud-visitors-count"></span> </span><span class="post-meta-item"><span class="post-meta-item-icon"><i class="far fa-comment"></i> </span><span class="post-meta-item-text">Disqus：</span> <a title="disqus" href="/2022/09/11/Leetcode-1862-%E5%90%91%E4%B8%8B%E5%8F%96%E6%95%B4%E6%95%B0%E5%AF%B9%E5%92%8C-Sum-of-Floored-Pairs-Hard-%E9%A2%98%E8%A7%A3%E5%88%86%E6%9E%90/#disqus_thread" itemprop="discussionUrl"><span class="post-comments-count disqus-comment-count" data-disqus-identifier="2022/09/11/Leetcode-1862-向下取整数对和-Sum-of-Floored-Pairs-Hard-题解分析/" itemprop="commentCount"></span></a></span></div></div></header><div class="post-body" itemprop="articleBody"><h3 id="题目介绍"><a href="#题目介绍" class="headerlink" title="题目介绍"></a>题目介绍</h3><p>Given an integer array <code>nums</code>, return the sum of <code>floor(nums[i] / nums[j])</code> for all pairs of indices <code>0 &lt;= i, j &lt; nums.length</code> in the array. Since the answer may be too large, return it modulo <code>10^9 + 7</code>.</p><p>The <code>floor()</code> function returns the integer part of the division.</p><p>对应中文<br>给你一个整数数组 <code>nums</code> ，请你返回所有下标对 <code>0 &lt;= i, j &lt; nums.length</code> 的 <code>floor(nums[i] / nums[j])</code> 结果之和。由于答案可能会很大，请你返回答案对<code>10^9 + 7</code> 取余 的结果。</p><p>函数 <code>floor()</code> 返回输入数字的整数部分。</p><h3 id="示例"><a href="#示例" class="headerlink" title="示例"></a>示例</h3><h4 id="Example-1"><a href="#Example-1" class="headerlink" title="Example 1:"></a>Example 1:</h4><blockquote><p><strong>Input:</strong> nums &#x3D; [2,5,9]<br><strong>Output:</strong> 10<br><strong>Explanation:</strong><br>floor(2 &#x2F; 5) &#x3D; floor(2 &#x2F; 9) &#x3D; floor(5 &#x2F; 9) &#x3D; 0<br>floor(2 &#x2F; 2) &#x3D; floor(5 &#x2F; 5) &#x3D; floor(9 &#x2F; 9) &#x3D; 1<br>floor(5 &#x2F; 2) &#x3D; 2<br>floor(9 &#x2F; 2) &#x3D; 4<br>floor(9 &#x2F; 5) &#x3D; 1<br>We calculate the floor of the division for every pair of indices in the array then sum them up.</p></blockquote><h4 id="Example-2"><a href="#Example-2" class="headerlink" title="Example 2:"></a>Example 2:</h4><blockquote><p><strong>Input:</strong> nums &#x3D; [7,7,7,7,7,7,7]<br><strong>Output:</strong> 49</p></blockquote><h4 id="Constraints"><a href="#Constraints" class="headerlink" title="Constraints:"></a>Constraints:</h4><ul><li><code>1 &lt;= nums.length &lt;= 10^5</code></li><li><code>1 &lt;= nums[i] &lt;= 10^5</code></li></ul><h3 id="简析"><a href="#简析" class="headerlink" title="简析"></a>简析</h3><p>这题不愧是 hard，要不是看了讨论区的一个大神的解答感觉从头做得想好久，<br>主要是两点，对于任何一个在里面的数，随便举个例子是 k，最简单的就是循环所有数对 k 除一下，<br>这样效率会很低，那么对于 k 有什么规律呢，就是对于所有小于 k 的数，往下取整都是 0，所以不用考虑，<br>对于所有大于 k 的数我们可以分成一个个的区间，[k,2k-1),[2k,3k-1),[3k,4k-1)……对于这些区间的<br>除了 k 往下取整，每个区间内的都是一样的，所以可以简化为对于任意一个 k，我只要知道与k 相同的有多少个，然后比 k 大的各个区间各有多少个数就可以了</p><h3 id="代码"><a href="#代码" class="headerlink" title="代码"></a>代码</h3><pre class="line-numbers language-java" data-language="java"><code class="language-java"><span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token constant">MAXE5</span> <span class="token operator">=</span> <span class="token number">100_000</span><span class="token punctuation">;</span>
<span class="token keyword">static</span> <span class="token keyword">final</span> <span class="token keyword">int</span> <span class="token constant">MODULUSE9</span> <span class="token operator">=</span> <span class="token number">1_000_000_000</span> <span class="token operator">+</span> <span class="token number">7</span><span class="token punctuation">;</span>
<span class="token keyword">public</span> <span class="token keyword">int</span> <span class="token function">sumOfFlooredPairs</span><span class="token punctuation">(</span><span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span> nums<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">int</span><span class="token punctuation">[</span><span class="token punctuation">]</span> counts <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token keyword">int</span><span class="token punctuation">[</span><span class="token constant">MAXE5</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">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> num <span class="token operator">:</span> nums<span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
counts<span class="token punctuation">[</span>num<span class="token punctuation">]</span><span class="token operator">++</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 这里就是很巧妙的给后一个加上前一个的值，这样其实前后任意两者之差就是这中间的元素数量</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> <span class="token constant">MAXE5</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
counts<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">+=</span> counts<span class="token punctuation">[</span>i <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">long</span> total <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> i <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator">&lt;=</span> <span class="token constant">MAXE5</span><span class="token punctuation">;</span> i<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">long</span> sum <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>counts<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">==</span> counts<span class="token punctuation">[</span>i<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">&#123;</span>
<span class="token keyword">continue</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">int</span> j <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">;</span> i<span class="token operator">*</span>j <span class="token operator">&lt;=</span> <span class="token constant">MAXE5</span><span class="token punctuation">;</span> j<span class="token operator">++</span><span class="token punctuation">)</span> <span class="token punctuation">&#123;</span>
<span class="token keyword">int</span> min <span class="token operator">=</span> i <span class="token operator">*</span> j <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span>
<span class="token keyword">int</span> upper <span class="token operator">=</span> i <span class="token operator">*</span> <span class="token punctuation">(</span>j <span class="token operator">+</span> <span class="token number">1</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 comment">// 在每一个区间内的数量，</span>
sum <span class="token operator">+=</span> <span class="token punctuation">(</span>counts<span class="token punctuation">[</span><span class="token class-name">Math</span><span class="token punctuation">.</span><span class="token function">min</span><span class="token punctuation">(</span>upper<span class="token punctuation">,</span> <span class="token constant">MAXE5</span><span class="token punctuation">)</span><span class="token punctuation">]</span> <span class="token operator">-</span> counts<span class="token punctuation">[</span>min<span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token punctuation">(</span><span class="token keyword">long</span><span class="token punctuation">)</span>j<span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token comment">// 左边乘数的数量，即 i 位置的元素数量</span>
total <span class="token operator">=</span> <span class="token punctuation">(</span>total <span class="token operator">+</span> <span class="token punctuation">(</span>sum <span class="token operator">%</span> <span class="token constant">MODULUSE9</span> <span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token punctuation">(</span>counts<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">-</span> counts<span class="token punctuation">[</span>i<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">)</span> <span class="token operator">%</span> <span class="token constant">MODULUSE9</span><span class="token punctuation">;</span>
<span class="token punctuation">&#125;</span>
<span class="token keyword">return</span> <span class="token punctuation">(</span><span class="token keyword">int</span><span class="token punctuation">)</span>total<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></code></pre><p>贴出来大神的解析,<a target="_blank" rel="noopener" href="https://leetcode.com/problems/sum-of-floored-pairs/discuss/1210222/Java-O(n-log(n))-Straightforward-brute-force-with-explanation-76-ms">解析</a></p><h3 id="结果"><a href="#结果" class="headerlink" title="结果"></a>结果</h3><p><img data-src="https://img.nicksxs.com/uPic/U6MYqd.png"></p></div><footer class="post-footer"><div class="post-eof"></div></footer></article></div><nav class="pagination"><span class="page-number current">1</span><a class="page-number" href="/page/2/">2</a><span class="space">&hellip;</span><a class="page-number" href="/page/36/">36</a><a class="extend next" rel="next" href="/page/2/"><i class="fa fa-angle-right" aria-label="下一页"></i></a></nav></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; <span itemprop="copyrightYear">2022</span> <span class="with-love"><i class="fa fa-heart"></i> </span><span class="author" itemprop="copyrightHolder">Nicksxs</span></div><div class="busuanzi-count"><span class="post-meta-item" id="busuanzi_container_site_uv"><span class="post-meta-item-icon"><i class="fa fa-user"></i> </span><span class="site-uv" title="总访客量"><span id="busuanzi_value_site_uv"></span> </span></span><span class="post-meta-item" id="busuanzi_container_site_pv"><span class="post-meta-item-icon"><i class="fa fa-eye"></i> </span><span class="site-pv" title="总访问量"><span id="busuanzi_value_site_pv"></span></span></span></div></div></footer><script src="https://cdnjs.cloudflare.com/ajax/libs/animejs/3.2.1/anime.min.js" integrity="sha256-XL2inqUJaslATFnHdJOi9GfQ60on8Wx1C2H8DYiN1xY=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/fancybox/3.5.7/jquery.fancybox.min.js" integrity="sha256-yt2kYMy0w8AbtF89WXb2P1rfjcP/HTHLT7097U8Y5b8=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/lozad.js/1.16.0/lozad.min.js" integrity="sha256-mOFREFhqmHeQbXpK2lp4nA3qooVgACfh88fpJftLBbc=" crossorigin="anonymous"></script><script src="/js/comments.js"></script><script src="/js/utils.js"></script><script src="/js/next-boot.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/hexo-generator-searchdb/1.4.0/search.js" integrity="sha256-vXZMYLEqsROAXkEw93GGIvaB2ab+QW6w3+1ahD9nXXA=" crossorigin="anonymous"></script><script src="/js/third-party/search/local-search.js"></script><script src="/js/third-party/fancybox.js"></script><script async src="https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script><script class="next-config" data-name="leancloud_visitors" type="application/json">{"enable":true,"app_id":"ysza182Vghlqjdt7QiwGLLJy-gzGzoHsz","app_key":"s9GDqbn7gnGGkusf66YRVccw","server_url":"https://leancloud.cn","security":true}</script><script src="/js/third-party/statistics/lean-analytics.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/quicklink/2.2.0/quicklink.umd.js" integrity="sha256-4kQf9z5ntdQrzsBC3YSHnEz02Z9C1UeW/E9OgnvlzSY=" crossorigin="anonymous"></script><script class="next-config" data-name="quicklink" type="application/json">{"enable":false,"home":false,"archive":false,"delay":true,"timeout":3000,"priority":true,"url":"https://nicksxs.me/"}</script><script src="/js/third-party/quicklink.js"></script><script class="next-config" data-name="disqus" type="application/json">{"enable":true,"shortname":"nicksxs","count":true,"i18n":{"disqus":"disqus"}}</script><script src="/js/third-party/comments/disqus.js"></script></body></html>