{"id":63654,"date":"2026-01-22T07:41:19","date_gmt":"2026-01-21T23:41:19","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/63654.html"},"modified":"2026-01-22T07:41:19","modified_gmt":"2026-01-21T23:41:19","slug":"%e3%80%90%e5%bf%ab%e5%88%b7%e9%9d%a2%e8%af%95-%e9%ab%98%e5%b9%b6%e5%8f%91%e9%94%81%e7%af%87%e3%80%91-%e5%9f%ba%e4%ba%8e%e7%a5%a8%e5%8a%a1%e7%b3%bb%e7%bb%9f%e5%9c%a8%e4%b8%8d%e5%90%8c%e6%9c%8d","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/63654.html","title":{"rendered":"\u3010\u5feb\u5237\u9762\u8bd5-\u9ad8\u5e76\u53d1\u9501\u7bc7\u3011- \u57fa\u4e8e\u7968\u52a1\u7cfb\u7edf\u5728\u4e0d\u540c\u670d\u52a1\u5668\uff0c\u5206\u5e03\u5f0f\u573a\u666f\u4e2d\u8be5\u5982\u4f55\u89e3\u51b3"},"content":{"rendered":"

\u3010\u5feb\u5237\u9762\u8bd5-\u9ad8\u5e76\u53d1\u9501\u7bc7\u3011- \u57fa\u4e8e\u7968\u52a1\u7cfb\u7edf\u5728\u4e0d\u540c\u670d\u52a1\u5668，\u5206\u5e03\u5f0f\u573a\u666f\u4e2d\u8be5\u5982\u4f55\u89e3\u51b3<\/h2>\n

\"\u8bf7\u6dfb\u52a0\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u5206\u5e03\u5f0f\u573a\u666f\u4e0b\u7684\u9501\u89e3\u51b3\u65b9\u6848<\/h4>\n

\u7968\u52a1\u7cfb\u7edf\u5728\u591a\u4e2a\u670d\u52a1\u5668\u90e8\u7f72\u65f6，\u5355\u673a\u9501（\u5982Java\u7684synchronized\u6216ReentrantLock）\u5931\u6548\u7684\u539f\u56e0\u5f88\u7b80\u5355：\u8fd9\u4e9b\u9501\u53ea\u5728\u5355\u4e2aJVM\u8fdb\u7a0b\u5185\u6709\u6548，\u65e0\u6cd5\u8de8\u670d\u52a1\u5668\u534f\u8c03\u3002\u4e09\u53f0\u670d\u52a1\u5668\u540c\u65f6\u8bfb\u53d6i=100\u5e76\u5404\u81ea\u6267\u884ci–，\u6700\u7ec8\u90fd\u5199\u5165i=99，\u5bfc\u81f4\u8d85\u5356\u3002<\/p>\n

\n

\u5206\u5e03\u5f0f\u9501\u7684\u6838\u5fc3\u8981\u6c42<\/h5>\n

\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u5fc5\u987b\u6ee1\u8db3\u56db\u4e2a\u6761\u4ef6（\u4e92\u9632\u53ef\u9ad8）：<\/p>\n

  • \u4e92\u65a5\u6027：\u540c\u4e00\u65f6\u523b\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u6301\u6709\u9501<\/li>\n
  • \u9632\u6b7b\u9501：\u9501\u5fc5\u987b\u6709\u81ea\u52a8\u8d85\u65f6\u91ca\u653e\u673a\u5236，\u9632\u6b62\u5ba2\u6237\u7aef\u5d29\u6e83\u5bfc\u81f4\u6c38\u4e45\u963b\u585e<\/li>\n
  • \u53ef\u91cd\u5165\u6027（\u53ef\u9009）：\u540c\u4e00\u4e2a\u5ba2\u6237\u7aef\u53ef\u591a\u6b21\u83b7\u53d6\u540c\u4e00\u628a\u9501<\/li>\n
  • \u9ad8\u53ef\u7528：\u9501\u670d\u52a1\u4e0d\u80fd\u662f\u5355\u70b9\u6545\u969c\u6e90<\/li>\n
    \n
    \u4e3b\u6d41\u89e3\u51b3\u65b9\u6848\u5bf9\u6bd4<\/h5>\n\n\u65b9\u6848\u5b9e\u73b0\u539f\u7406\u4f18\u70b9\u7f3a\u70b9\u9002\u7528\u573a\u666f<\/tr>\n\n\n\n\n\n\n
    \u6570\u636e\u5e93\u60b2\u89c2\u9501<\/td>\nSELECT … FOR UPDATE<\/td>\n\u7b80\u5355，\u65e0\u9700\u989d\u5916\u7ec4\u4ef6<\/td>\n\u6027\u80fd\u5dee，\u6613\u6b7b\u9501，\u65e0\u6cd5\u4f18\u96c5\u5904\u7406\u8d85\u65f6<\/td>\n\u5e76\u53d1\u91cf\u6781\u4f4e（<10 TPS）<\/td>\n<\/tr>\n
    Redis\u5206\u5e03\u5f0f\u9501<\/td>\nSET NX PX + Lua\u811a\u672c<\/td>\n\u6027\u80fd\u6781\u9ad8（\u4e07\u7ea7TPS），\u5b9e\u73b0\u7b80\u6d01<\/td>\n\u8fc7\u671f\u65f6\u95f4\u96be\u8bc4\u4f30，\u4e3b\u4ece\u5207\u6362\u53ef\u80fd\u4e22\u9501<\/td>\n\u7edd\u5927\u591a\u6570\u4e92\u8054\u7f51\u4e1a\u52a1<\/td>\n<\/tr>\n
    Redisson\u6846\u67b6<\/td>\nRedis + WatchDog\u673a\u5236<\/td>\n\u81ea\u52a8\u7eed\u671f，\u652f\u6301\u53ef\u91cd\u5165，\u6709\u6210\u719f\u6846\u67b6<\/td>\n\u4f9d\u8d56Redis\u96c6\u7fa4\u7a33\u5b9a\u6027<\/td>\n\u5f3a\u70c8\u63a8\u8350<\/td>\n<\/tr>\n
    ZooKeeper\u4e34\u65f6\u8282\u70b9<\/td>\n\u521b\u5efa\u4e34\u65f6\u987a\u5e8f\u8282\u70b9<\/td>\n\u53ef\u9760\u6027\u9ad8，\u81ea\u52a8\u91ca\u653e，\u65e0\u6b7b\u9501<\/td>\n\u6027\u80fd\u8f83\u4f4e（\u5343\u7ea7TPS），\u9700\u7ef4\u62a4ZK\u96c6\u7fa4<\/td>\n\u91d1\u878d\u7ea7\u5f3a\u4e00\u81f4\u573a\u666f<\/td>\n<\/tr>\n
    Etcd\u79df\u7ea6\u673a\u5236<\/td>\nLease + Revision<\/td>\n\u5f3a\u4e00\u81f4\u6027，TTL\u81ea\u52a8\u8fc7\u671f<\/td>\n\u8fd0\u7ef4\u590d\u6742，\u793e\u533a\u8f83\u5c0f<\/td>\nKubernetes\u751f\u6001<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n
    \u5b9e\u6218\u63a8\u8350：Redisson\u5206\u5e03\u5f0f\u9501<\/h5>\n

    \u5bf9\u4e8e\u7968\u52a1\u7cfb\u7edf\u8fd9\u7c7b\u9ad8\u5e76\u53d1\u3001\u6027\u80fd\u654f\u611f\u7684\u573a\u666f，Redisson\u662f\u6700\u4f73\u5b9e\u8df5：<\/p>\n

    \/\/ 1. \u5f15\u5165\u4f9d\u8d56<\/span>
    \n\/\/ Maven: <artifactId>redisson-spring-boot-starter<\/artifactId><\/span><\/p>\n

    \/\/ 2. \u914d\u7f6eRedis\u96c6\u7fa4<\/span>
    \n@Configuration<\/span>
    \npublic<\/span> class<\/span> RedissonConfig<\/span> {<\/span>
    \n @Bean<\/span>
    \n public<\/span> RedissonClient<\/span> redissonClient<\/span>(<\/span>)<\/span> {<\/span>
    \n Config<\/span> config =<\/span> new<\/span> Config<\/span>(<\/span>)<\/span>;<\/span>
    \n config.<\/span>useClusterServers<\/span>(<\/span>)<\/span>
    \n .<\/span>addNodeAddress<\/span>(<\/span>"redis:\/\/127.0.0.1:7001"<\/span>,<\/span> "redis:\/\/127.0.0.1:7002"<\/span>)<\/span>;<\/span>
    \n return<\/span> Redisson<\/span>.<\/span>create<\/span>(<\/span>config)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \/\/ 3. \u4e1a\u52a1\u4ee3\u7801\u6539\u9020<\/span>
    \n@Service<\/span>
    \npublic<\/span> class<\/span> TicketService<\/span> {<\/span>
    \n @Autowired<\/span>
    \n private<\/span> RedissonClient<\/span> redissonClient;<\/span><\/p>\n

    public<\/span> boolean<\/span> sellTicket<\/span>(<\/span>Long<\/span> ticketId)<\/span> {<\/span>
    \n \/\/ \u9501\u7684\u7c92\u5ea6\u8981\u7ec6，\u7528ticketId\u4f5cKey<\/span>
    \n RLock<\/span> lock =<\/span> redissonClient.<\/span>getLock<\/span>(<\/span>"ticket_lock:"<\/span> +<\/span> ticketId)<\/span>;<\/span><\/p>\n

    try<\/span> {<\/span>
    \n \/\/ \u5c1d\u8bd5\u52a0\u9501，\u6700\u591a\u7b49\u5f855\u79d2，\u9501\u81ea\u52a8\u91ca\u653e30\u79d2<\/span>
    \n \/\/ WatchDog\u4f1a\u81ea\u52a8\u7eed\u671f（\u9ed8\u8ba4\u6bcf10\u79d2\u7eed\u4e00\u6b21）<\/span>
    \n boolean<\/span> isLocked =<\/span> lock.<\/span>tryLock<\/span>(<\/span>5<\/span>,<\/span> 30<\/span>,<\/span> TimeUnit<\/span>.<\/span>SECONDS)<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>isLocked)<\/span> {<\/span>
    \n throw<\/span> new<\/span> RuntimeException<\/span>(<\/span>"\u7cfb\u7edf\u7e41\u5fd9，\u8bf7\u91cd\u8bd5"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u6267\u884c\u4e1a\u52a1：\u67e5\u8be2\u5e93\u5b58 \u2192 \u51cf\u5e93\u5b58<\/span>
    \n Ticket<\/span> ticket =<\/span> ticketMapper.<\/span>selectById<\/span>(<\/span>ticketId)<\/span>;<\/span>
    \n if<\/span> (<\/span>ticket.<\/span>getStock<\/span>(<\/span>)<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>
    \n ticket.<\/span>setStock<\/span>(<\/span>ticket.<\/span>getStock<\/span>(<\/span>)<\/span> –<\/span> 1<\/span>)<\/span>;<\/span>
    \n ticketMapper.<\/span>updateById<\/span>(<\/span>ticket)<\/span>;<\/span>
    \n return<\/span> true<\/span>;<\/span>
    \n }<\/span>
    \n return<\/span> false<\/span>;<\/span><\/p>\n

    }<\/span> catch<\/span> (<\/span>InterruptedException<\/span> e)<\/span> {<\/span>
    \n Thread<\/span>.<\/span>currentThread<\/span>(<\/span>)<\/span>.<\/span>interrupt<\/span>(<\/span>)<\/span>;<\/span>
    \n return<\/span> false<\/span>;<\/span>
    \n }<\/span> finally<\/span> {<\/span>
    \n \/\/ \u5fc5\u987b\u91ca\u653e\u9501，\u4e14\u53ea\u80fd\u91ca\u653e\u81ea\u5df1\u6301\u6709\u7684\u9501<\/span>
    \n if<\/span> (<\/span>lock.<\/span>isHeldByCurrentThread<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
    \n lock.<\/span>unlock<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \n
    \u5173\u952e\u8bbe\u8ba1\u8981\u70b9<\/h5>\n
  • \u9501\u7c92\u5ea6：\u6309ticketId\u52a0\u9501，\u907f\u514d\u5168\u5c40\u9501\u963b\u585e\u6240\u6709\u7968\u79cd<\/li>\n
  • Key\u547d\u540d：\u4e1a\u52a1:\u6a21\u5757:\u8d44\u6e90ID，\u5982ticket:stock:12345<\/li>\n
  • \u9632\u8bef\u5220：Redisson\u7684\u9501\u5b9e\u4f8b\u4f1a\u5b58\u50a8\u7ebf\u7a0bID，\u9632\u6b62A\u7ebf\u7a0b\u91ca\u653eB\u7ebf\u7a0b\u7684\u9501<\/li>\n
  • \u8d85\u65f6\u65f6\u95f4：\u5fc5\u987b\u8bbe\u7f6e，\u4e14\u8981\u8fdc\u5927\u4e8e\u4e1a\u52a1\u6267\u884c\u65f6\u95f4（WatchDog\u4f1a\u7eed\u671f）<\/li>\n
  • \u9501\u91cd\u8bd5：tryLock\u652f\u6301\u7b49\u5f85\u65f6\u95f4，\u907f\u514d\u7acb\u5373\u5931\u8d25<\/li>\n
    \n
    \u4e3a\u4ec0\u4e48\u4e0d\u80fd\u53ea\u7528\u6570\u636e\u5e93？<\/h5>\n

    — \u60b2\u89c2\u9501\u65b9\u6848（\u4e0d\u63a8\u8350）<\/span>
    \nBEGIN<\/span>;<\/span>
    \nSELECT<\/span> stock FROM<\/span> ticket WHERE<\/span> id =<\/span> 123<\/span> FOR<\/span> UPDATE<\/span>;<\/span> — \u963b\u585e\u5176\u4ed6\u4e8b\u52a1<\/span>
    \nUPDATE<\/span> ticket SET<\/span> stock =<\/span> stock –<\/span> 1<\/span> WHERE<\/span> id =<\/span> 123<\/span>;<\/span>
    \nCOMMIT<\/span>;<\/span><\/p>\n

    \u95ee\u9898：\u6027\u80fd\u6781\u5dee，TPS\u901a\u5e38<50，\u4e14\u957f\u4e8b\u52a1\u4f1a\u62d6\u57ae\u6570\u636e\u5e93\u3002Redis\u65b9\u6848\u6027\u80fd\u662f\u5176100\u500d\u4ee5\u4e0a\u3002<\/p>\n

    \n
    \u67b6\u6784\u6f14\u8fdb\u5efa\u8bae<\/h5>\n

    \u5982\u679c\u4f60\u4eec\u7684\u7cfb\u7edf\u5df2\u7ecf\u7528MySQL，\u6700\u5c0f\u6210\u672c\u63a5\u5165Redisson：<\/p>\n

  • \u90e8\u7f72\u4e00\u4e2aRedis\u96c6\u7fa4（3\u4e3b3\u4ece）<\/li>\n
  • \u5f15\u5165redisson-spring-boot-starter<\/li>\n
  • \u6539\u9020\u6838\u5fc3\u5e93\u5b58\u63a5\u53e3<\/li>\n

    \u540e\u7eed\u5982\u679c\u5e93\u5b58\u4e89\u62a2\u6781\u5ea6\u6fc0\u70c8（\u5982\u6625\u8fd0\u62a2\u7968），\u53ef\u5347\u7ea7\u4e3a\u5206\u6bb5\u9501\u6216\u6d88\u606f\u961f\u5217\u5f02\u6b65\u6263\u5e93\u5b58，\u4f4690%\u7684\u573a\u666f\u4e0bRedisson\u5206\u5e03\u5f0f\u9501\u5df2\u5b8c\u5168\u591f\u7528\u3002<\/p>\n

    \u603b\u7ed3：\u5206\u5e03\u5f0f\u9501\u7684\u672c\u8d28\u662f\u628a\u591a\u673a\u5e76\u53d1\u8f6c\u4e3a\u5355\u673a\u6392\u961f，Redis+Redisson\u662f\u76ee\u524d\u5de5\u4e1a\u754c\u6700\u6210\u719f\u7684\u65b9\u6848，\u6ca1\u6709\u4e4b\u4e00\u3002<\/p>\n

    \u3010\u8be6\u89e3-\u9501\u76844\u5927\u6761\u4ef6\u3011<\/h2>\n

    \u6211\u7528\u6625\u8fd0\u62a2\u7968\u8fd9\u4e00\u4e2a\u5b8c\u6574\u6545\u4e8b，\u628a\u56db\u4e2a\u6761\u4ef6\u4e32\u8d77\u6765\u7ed9\u4f60\u8bb2\u900f：<\/p>\n

    \n

    \u6545\u4e8b\u80cc\u666f<\/h4>\n

    2025\u5e74\u6625\u8fd0，10\u4e07\u7528\u6237\u62a2\u6700\u540e1000\u5f20\u706b\u8f66\u7968，\u7cfb\u7edf\u90e8\u7f72\u57285\u53f0\u670d\u52a1\u5668\u4e0a，\u5e93\u5b58\u670d\u52a1\u5171\u7528MySQL\u3002<\/p>\n

    \n

    \u6761\u4ef61：\u4e92\u65a5\u6027（\u540c\u4e00\u65f6\u95f4\u53ea\u67091\u4e2a\u4eba\u80fd\u62a2\u5230\u6700\u540e\u7968）<\/h5>\n

    \u573a\u666f：\u7528\u6237\u5f20\u4e09\u548c\u674e\u56db\u540c\u65f6\u770b\u5230"\u6700\u540e1\u5f20\u7968"\u3002<\/p>\n

      \n
    • \u65e0\u9501\u707e\u96be：\u4e24\u53f0\u670d\u52a1\u5668\u540c\u65f6\u6267\u884cSELECT stock=1 \u2192 \u90fd\u5224\u65ad\u6709\u7968 \u2192 \u90fd\u6267\u884cstock-1 \u2192 \u5e93\u5b58\u53d8\u6210-1，\u8d85\u53561\u5f20，\u4e24\u4eba\u4ed8\u6b3e\u6210\u529f，\u7cfb\u7edf\u5d29\u6e83\u3002<\/li>\n
    • \u5206\u5e03\u5f0f\u9501\u4ecb\u5165：Redisson\u5728Redis\u4e2d\u521b\u5efaticket_lock:123\u952e，\u53ea\u6709\u4e00\u53f0\u670d\u52a1\u5668\u80fdSET\u6210\u529f，\u53e6\u4e00\u53f0\u7b49\u5f85\u3002\u5f20\u4e09\u7684\u8bf7\u6c42\u5148\u62ff\u5230\u9501，\u674e\u56db\u7684\u8bf7\u6c42\u963b\u585e\u7b49\u5f85\u3002<\/li>\n<\/ul>\n

      \u53e3\u8bc0：\u9501\u5c31\u662f"\u72ec\u6728\u6865"，\u4e00\u6b21\u53ea\u80fd\u8fc7\u4e00\u4eba\u3002<\/p>\n

      \n
      \u6761\u4ef62：\u9632\u6b7b\u9501（\u670d\u52a1\u5668\u8dea\u4e86，\u9501\u5fc5\u987b\u81ea\u52a8\u91ca\u653e）<\/h5>\n

      \u573a\u666f：\u670d\u52a1\u5668A\u62ff\u5230\u9501\u540e，\u521a\u8981\u6263\u51cf\u5e93\u5b58，\u7a81\u7136JVM OOM\u5b95\u673a\u4e86\u3002<\/p>\n

        \n
      • \u6b7b\u9501\u707e\u96be：\u9501ticket_lock:123\u6c38\u8fdc\u7559\u5728Redis，\u5176\u4ed6\u670d\u52a1\u5668\u90fd\u4ee5\u4e3a"\u6709\u4eba\u6301\u9501"，\u5168\u90e8\u963b\u585e\u3002\u7968\u5356\u4e0d\u51fa，\u7cfb\u7edf\u5361\u6b7b\u3002<\/li>\n
      • Redisson\u65b9\u6848：\u52a0\u9501\u65f6\u8bbe\u7f6e30\u79d2\u81ea\u52a8\u8fc7\u671f + WatchDog\u6bcf10\u79d2\u7eed\u671f\u3002\u670d\u52a1\u5668A\u5b95\u673a\u540e，WatchDog\u7ebf\u7a0b\u4e00\u8d77\u6b7b，30\u79d2\u540eRedis\u81ea\u52a8\u5220\u9664\u9501，\u5176\u4ed6\u670d\u52a1\u5668\u6062\u590d\u6b63\u5e38\u62a2\u7968\u3002<\/li>\n<\/ul>\n

        \u53e3\u8bc0：\u9501\u5e26"\u5b9a\u65f6\u70b8\u5f39"，\u6301\u6709\u4eba\u6b7b\u4e86\u5c31\u70b8\u5f00\u9501\u3002<\/p>\n

        \n
        \u6761\u4ef63：\u53ef\u91cd\u5165\u6027（\u540c\u4e00\u4e2a\u7528\u6237\u591a\u6b21\u64cd\u4f5c\u540c\u4e00\u8d44\u6e90）<\/h5>\n

        \u573a\u666f：\u5f20\u4e09\u4ed8\u6b3e\u6210\u529f\u540e，\u7cfb\u7edf\u8981\u66f4\u65b0\u8ba2\u5355\u72b6\u6001 + \u53d1\u9001\u77ed\u4fe1\u901a\u77e5，\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u9700\u8981\u786e\u8ba4\u5e93\u5b58\u5df2\u6263\u51cf\u3002<\/p>\n

        \/\/ \u4f2a\u4ee3\u7801\u5c55\u793a\u5d4c\u5957\u8c03\u7528<\/span>
        \npublic<\/span> void<\/span> processPayment<\/span>(<\/span>Long<\/span> ticketId)<\/span> {<\/span>
        \n lock.<\/span>lock<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u7b2c\u4e00\u6b21\u83b7\u53d6\u9501<\/span>
        \n try<\/span> {<\/span>
        \n deductStock<\/span>(<\/span>ticketId)<\/span>;<\/span> \/\/ \u6263\u5e93\u5b58<\/span>
        \n updateOrderStatus<\/span>(<\/span>orderId)<\/span>;<\/span> \/\/ \u5185\u90e8\u4e5f\u9700\u8981\u9501<\/span>
        \n sendSmsNotification<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u5185\u90e8\u4e5f\u9700\u8981\u9501<\/span>
        \n }<\/span> finally<\/span> {<\/span>
        \n lock.<\/span>unlock<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u91ca\u653e\u9501<\/span>
        \n }<\/span>
        \n}<\/span><\/p>\n

          \n
        • \u4e0d\u53ef\u91cd\u5165\u707e\u96be：updateOrderStatus\u5185\u90e8\u518d\u6b21\u5c1d\u8bd5\u83b7\u53d6\u540c\u4e00\u628a\u9501，\u53d1\u73b0\u81ea\u5df1\u88ab"\u81ea\u5df1"\u963b\u585e，\u6c38\u8fdc\u5361\u6b7b\u3002<\/li>\n
        • Redisson\u65b9\u6848：\u9501\u8bb0\u5f55\u7ebf\u7a0bID\u548c\u91cd\u5165\u6b21\u6570\u3002\u540c\u7ebf\u7a0b\u53ef\u91cd\u590d\u83b7\u53d6，\u6bcf\u6b21unlock()\u8ba1\u6570\u51cf1，\u8ba1\u6570\u52300\u624d\u771f\u6b63\u91ca\u653e\u3002<\/li>\n<\/ul>\n

          \u53e3\u8bc0：\u81ea\u5df1\u5bb6\u7684\u94a5\u5319，\u53ef\u4ee5\u53cd\u590d\u5f00\u95e8，\u51fa\u95e8\u65f6\u5173\u51e0\u6b21\u95e8\u624d\u7b97\u771f\u6b63\u9501\u4e0a\u3002<\/p>\n

          \n
          \u6761\u4ef64：\u9ad8\u53ef\u7528（\u9501\u670d\u52a1\u4e0d\u80fd\u662f\u5355\u673a）<\/h5>\n

          \u573a\u666f：\u6625\u8fd0\u9ad8\u5cf0\u671f，Redis\u4e3b\u8282\u70b9\u625b\u4e0d\u4f4f10\u4e07\u5e76\u53d1，\u7a81\u7136\u6302\u4e86\u3002<\/p>\n

            \n
          • \u5355\u70b9\u6545\u969c\u707e\u96be：\u6240\u6709\u9501\u8bf7\u6c42\u5931\u8d25，\u62a2\u7968\u7cfb\u7edf\u5168\u9762\u762b\u75ea，\u5ba2\u670d\u7535\u8bdd\u88ab\u6253\u7206\u3002<\/li>\n
          • Redisson\u65b9\u6848：\u90e8\u7f723\u4e3b3\u4eceRedis Cluster，\u9501\u6570\u636e\u5206\u7247\u5b58\u50a8\u3002\u4e3b\u8282\u70b9\u6302\u6389，\u4ece\u8282\u70b9\u81ea\u52a8\u63d0\u5347，\u5ba2\u6237\u7aef\u65e0\u611f\u77e5\u5207\u6362\u3002\u914d\u5408\u54e8\u5175\u6a21\u5f0f，\u6545\u969c\u6062\u590d<10\u79d2\u3002<\/li>\n<\/ul>\n

            \u53e3\u8bc0：\u9501\u670d\u52a1\u8981\u50cf"\u53cc11\u5ba2\u670d"，\u4e00\u4e2a\u5012\u4e0b，\u53e6\u4e00\u4e2a\u7acb\u523b\u9876\u4e0a\u3002<\/p>\n

            \n

            \u56db\u6761\u4ef6\u4e32\u8054\u8bb0\u5fc6\u6a21\u677f（\u5feb\u5237\u7528）<\/h4>\n

            \u6545\u4e8b\u7ebf：\u6625\u8fd0\u62a2\u7968 \u2192 \u670d\u52a1\u5668\u5b95\u673a \u2192 \u5d4c\u5957\u8c03\u7528 \u2192 Redis\u96c6\u7fa4\u6545\u969c<\/p>\n

            \u4e92\u65a5\u6027：10\u4e07\u4eba\u62a21\u5f20\u7968，\u9501\u4fdd\u8bc1\u53ea\u67091\u4eba\u6210\u529f
            \n\u9632\u6b7b\u9501：\u670d\u52a1\u5668A\u62ff\u5230\u9501\u540eOOM，30\u79d2\u81ea\u52a8\u91ca\u653e
            \n\u53ef\u91cd\u5165\u6027：\u5f20\u4e09\u4ed8\u6b3e\u6d41\u7a0b\u5185，\u8ba2\u5355\/\u77ed\u4fe1\u65b9\u6cd5\u590d\u7528\u540c\u4e00\u628a\u9501
            \n\u9ad8\u53ef\u7528：Redis\u4e3b\u8282\u70b9\u6302\u4e86，\u4ece\u8282\u70b9\u79d2\u7ea7\u63a5\u7ba1<\/p>\n

            \u6280\u672f\u6620\u5c04：
            \n\u4e92\u65a5 \u2192 SET NX\u539f\u5b50\u547d\u4ee4
            \n\u9632\u6b7b\u9501 \u2192 PX\u8fc7\u671f\u65f6\u95f4 + WatchDog\u7eed\u671f
            \n\u53ef\u91cd\u5165 \u2192 Hash\u7ed3\u6784\u8bb0\u5f55threadId + count
            \n\u9ad8\u53ef\u7528 \u2192 Redis Cluster \/ Sentinel<\/p>\n

            \n

            \u4e00\u53e5\u8bdd\u603b\u7ed3：\u5206\u5e03\u5f0f\u9501\u5c31\u662f\u7ed9"\u8de8\u670d\u52a1\u5668\u7684\u4e34\u754c\u8d44\u6e90"\u914d\u4e00\u4e2a\u5e26\u81ea\u52a8\u89e3\u9501\u3001\u53ef\u91cd\u590d\u8fdb\u5165\u3001\u96c6\u7fa4\u90e8\u7f72\u7684"\u667a\u80fd\u95e8\u536b"\u3002<\/p>\n

            \u8fd9\u4e2a\u4e32\u8054\u6545\u4e8b\u4f60\u53ef\u4ee5\u76f4\u63a5\u7528，\u9762\u8bd5\u65f6\u8bb2\u51fa\u6765\u6bd4\u80cc\u516b\u80a1\u6587\u751f\u52a810\u500d\u3002<\/p>\n

            \u7b80\u5355\u8d2d\u7968\u793a\u4f8b\u4e00\u53e5\u8bdd\u8bf4\u6e05\u695a<\/h3>\n

            \u4e00\u53e5\u8bdd\u7248\u672c：<\/p>\n

            \u5206\u5e03\u5f0f\u9501\u786e\u4fdd"\u6700\u540e1\u5f20\u7968\u53ea\u80fd\u88ab1\u4eba\u6210\u529f\u8d2d\u4e70，\u82e5\u4e70\u5bb6\u670d\u52a1\u5668\u5d29\u6e83\u950130\u79d2\u81ea\u52a8\u91ca\u653e\u9632\u5361\u6b7b，\u540c\u4e70\u5bb6\u4ed8\u6b3e\u6d41\u7a0b\u53ef\u91cd\u590d\u83b7\u53d6\u9501，\u9501\u670d\u52a1\u96c6\u7fa4\u90e8\u7f72\u907f\u514d\u5355\u673a\u6545\u969c\u5bfc\u81f4\u7cfb\u7edf\u762b\u75ea"\u3002<\/p>\n

            \n

            \u6781\u7b80\u5173\u952e\u8bcd\u7248：<\/p>\n

            \u5206\u5e03\u5f0f\u9501\u901a\u8fc7 \u4e92\u65a5\u62a2\u7968\u3001\u5d29\u6e83\u81ea\u6108\u3001\u540c\u7528\u6237\u53ef\u91cd\u5165\u3001\u96c6\u7fa4\u9ad8\u53ef\u7528 \u56db\u5927\u673a\u5236，\u786e\u4fdd10\u4e07\u4eba\u62a2\u6700\u540e1\u5f20\u7968\u65f6\u7edd\u4e0d\u8d85\u5356\u3002<\/p>\n

            \u3010\u9762\u8bd5\u7248\u672c\u3011<\/h3>\n

            \u9762\u8bd5\u9ad8\u5206\u56de\u7b54\u6a21\u677f（\u603b\u5206\u603b\u7ed3\u6784）<\/h4>\n

            \u603b\u8d77：\u5206\u5e03\u5f0f\u9501\u7684\u672c\u8d28\u662f\u89e3\u51b3\u591a\u673a\u73af\u5883\u4e0b\u4e34\u754c\u8d44\u6e90\u7ade\u4e89，\u4ee5\u6625\u8fd0\u62a2\u7968\u7cfb\u7edf\u4e3a\u4f8b，\u5206\u5e03\u5f0f\u9501\u5fc5\u987b\u6ee1\u8db3\u56db\u4e2a\u6761\u4ef6\u624d\u80fd\u4fdd\u969c\u4e1a\u52a1\u6b63\u786e\u6027：<\/p>\n

            \n

            1. \u4e92\u65a5\u6027（ Mutual Exclusion ）<\/h4>\n

            \u5b9a\u4e49：\u540c\u4e00\u65f6\u523b，\u96c6\u7fa4\u4e2d\u4ec5\u6709\u4e00\u4e2a\u8282\u70b9\u80fd\u6301\u6709\u9501\u64cd\u4f5c\u5e93\u5b58\u3002<\/p>\n

            \u573a\u666f：10\u4e07\u7528\u6237\u62a2\u6700\u540e1\u5f20\u7968，5\u53f0\u670d\u52a1\u5668\u540c\u65f6\u8bfb\u5230stock=1\u3002\u82e5\u65e0\u4e92\u65a5，\u6bcf\u53f0\u90fd\u4f1a\u6267\u884cstock-1，\u5bfc\u81f4\u5e93\u5b58\u8d85\u5356\u4e3a-4\u3002<\/p>\n

            \u5b9e\u73b0：Redis\u7684SET NX\u539f\u5b50\u547d\u4ee4，\u53ea\u6709\u552f\u4e00\u5ba2\u6237\u7aef\u80fd\u521b\u5efaticket_lock:123\u952e\u3002Redisson\u901a\u8fc7Lua\u811a\u672c\u4fdd\u8bc1"\u5224\u65ad\u5b58\u5728+\u8bbe\u7f6e\u503c+\u8bbe\u7f6eTTL"\u7684\u539f\u5b50\u6027，\u907f\u514dSET+EXPIRE\u975e\u539f\u5b50\u5bfc\u81f4\u7684\u6b7b\u9501\u98ce\u9669\u3002<\/p>\n

            \u7ec6\u8282：\u9501\u7684\u7c92\u5ea6\u5fc5\u987b\u7cbe\u786e\u5230\u8d44\u6e90ID（ticket_lock:${ticketId}），\u800c\u975e\u5168\u5c40\u9501，\u5426\u5219\u6240\u6709\u8f66\u6b21\u4e32\u884c\u5316，\u6027\u80fd\u5d29\u6e83\u3002<\/p>\n

            \n

            2. \u9632\u6b7b\u9501（ Deadlock-Free ）<\/h4>\n

            \u5b9a\u4e49：\u6301\u6709\u9501\u7684\u8282\u70b9\u5d29\u6e83\u65f6，\u9501\u5fc5\u987b\u81ea\u52a8\u91ca\u653e，\u9632\u6b62\u5176\u4ed6\u8282\u70b9\u6c38\u4e45\u963b\u585e\u3002<\/p>\n

            \u573a\u666f：\u670d\u52a1\u5668A\u83b7\u53d6\u9501\u540e，JVM OOM\u5b95\u673a，\u9501\u672a\u91ca\u653e\u2192\u6240\u6709\u670d\u52a1\u5668\u7b49\u5f85\u2192\u7cfb\u7edf\u5361\u6b7b，1000\u5f20\u7968\u65e0\u6cd5\u552e\u5356\u3002<\/p>\n

            \u5b9e\u73b0：Redisson\u91c7\u7528WatchDog\u673a\u5236：\u9501\u9ed8\u8ba430\u79d2\u8fc7\u671f，\u5ba2\u6237\u7aef\u542f\u52a8\u540e\u53f0\u7ebf\u7a0b\u6bcf10\u79d2\u7eed\u671f\u3002\u82e5\u5ba2\u6237\u7aef\u5b95\u673a，\u7eed\u671f\u505c\u6b62，30\u79d2\u540eRedis\u81ea\u52a8\u5220\u9501\u3002<\/p>\n

            \u5bf9\u6bd4：ZooKeeper\u7528\u4e34\u65f6\u8282\u70b9，\u4f1a\u8bdd\u65ad\u5f00\u81ea\u52a8\u5220\u9664，\u53ef\u9760\u6027\u66f4\u9ad8\u4f46\u6027\u80fd\u8f83\u5dee\u3002\u6570\u636e\u5e93\u60b2\u89c2\u9501\u65e0\u81ea\u52a8\u8d85\u65f6，\u9700\u989d\u5916\u5fc3\u8df3\u8868，\u5b9e\u73b0\u590d\u6742\u4e14\u4f4e\u6548\u3002<\/p>\n

            \n

            3. \u53ef\u91cd\u5165\u6027（ Reentrancy ）<\/h4>\n

            \u5b9a\u4e49：\u540c\u4e00\u5ba2\u6237\u7aef\u7684\u540c\u4e00\u7ebf\u7a0b\u53ef\u591a\u6b21\u83b7\u53d6\u5df2\u6301\u6709\u7684\u9501，\u907f\u514d\u81ea\u6b7b\u9501\u3002<\/p>\n

            \u573a\u666f：\u7528\u6237\u4e0b\u8ba2\u5355\u65f6，sellTicket()\u8c03\u7528\u94fe\u5d4c\u5957updateOrder()\u2192sendSms()，\u4e09\u8005\u5747\u9700\u6821\u9a8c\u5e93\u5b58\u3002\u82e5\u4e0d\u53ef\u91cd\u5165，\u7b2c\u4e8c\u6b21lock()\u4f1a\u963b\u585e\u81ea\u5df1\u3002<\/p>\n

            \u5b9e\u73b0：Redisson\u4f7f\u7528Hash\u7ed3\u6784\u5b58\u50a8threadId\u548ccount\u3002\u540c\u7ebf\u7a0b\u91cd\u590d\u83b7\u53d6\u65f6count++，\u6bcf\u6b21unlock()\u65f6count–，\u8ba1\u6570\u5f52\u96f6\u624d\u771f\u6b63\u5220\u9664\u9501\u3002<\/p>\n

            \u4ef7\u503c：\u63d0\u5347\u4e1a\u52a1\u5c01\u88c5\u7075\u6d3b\u6027，\u907f\u514d\u65b9\u6cd5\u8c03\u7528\u94fe\u56e0\u9501\u95ee\u9898\u8026\u5408\u3002<\/p>\n

            \n

            4. \u9ad8\u53ef\u7528（ High Availability ）<\/h4>\n

            \u5b9a\u4e49：\u9501\u670d\u52a1\u4e0d\u80fd\u662f\u5355\u70b9，\u5fc5\u987b\u652f\u6301\u6545\u969c\u81ea\u52a8\u8f6c\u79fb\u3002<\/p>\n

            \u573a\u666f：Redis\u5355\u673a\u90e8\u7f72，\u4e3b\u8282\u70b9\u5b95\u673a\u2192\u6240\u6709\u9501\u8bf7\u6c42\u5931\u8d25\u2192\u6625\u8fd0\u9ad8\u5cf0\u671f\u7cfb\u7edf\u762b\u75ea，\u5f15\u53d1P0\u7ea7\u6545\u969c\u3002<\/p>\n

            \u5b9e\u73b0：Redis Cluster\u96c6\u7fa4（3\u4e3b3\u4ece）+ Sentinel\u54e8\u5175\u3002\u9501\u6570\u636e\u5206\u7247\u5b58\u50a8，\u4e3b\u8282\u70b9\u6545\u969c\u65f6\u4ece\u8282\u70b9\u79d2\u7ea7\u63d0\u5347，Redisson\u5ba2\u6237\u7aef\u81ea\u52a8\u5207\u6362\u8fde\u63a5\u3002<\/p>\n

            \u6743\u8861：ZooKeeper\u901a\u8fc7ZAB\u534f\u8bae\u4fdd\u8bc1\u5f3a\u4e00\u81f4，\u4f46\u5199\u5165\u6027\u80fd\u4ec5\u4e3aRedis\u76841\/10\u3002Redis\u4e3b\u4ece\u5f02\u6b65\u590d\u5236\u53ef\u80fd\u4e22\u9501（\u4e3b\u5b95\u673a\u4ece\u672a\u540c\u6b65），\u9700\u6839\u636e\u4e1a\u52a1\u5bb9\u5fcd\u5ea6\u9009\u578b：\u8d85\u5356\u96f6\u5bb9\u5fcd\u7528ZK，\u6027\u80fd\u4f18\u5148\u7528Redis\u3002<\/p>\n

            \n

            \u603b\u7ed3\u5347\u534e<\/h4>\n

            \u56db\u4e2a\u6761\u4ef6\u73af\u73af\u76f8\u6263：\u4e92\u65a5\u6027\u662f\u76ee\u6807，\u9632\u6b7b\u9501\u662f\u515c\u5e95，\u53ef\u91cd\u5165\u662f\u5de5\u7a0b\u53cb\u597d，\u9ad8\u53ef\u7528\u662f\u5e95\u7ebf\u3002\u5b9e\u9645\u9009\u578b\u4e2d，Redisson + Redis Cluster\u662f\u4e92\u8054\u7f51\u4e1a\u52a1\u6807\u914d，\u517c\u987e\u6027\u80fd\u4e0e\u53ef\u7528\u6027；\u91d1\u878d\u573a\u666f\u53ef\u63a5\u53d7\u6027\u80fd\u635f\u8017\u5219\u9009ZooKeeper\u3002\u56de\u7b54\u65f6\u53ef\u4e3b\u52a8\u63d0\u53caRedlock\u7b97\u6cd5\u4e89\u8bae（Redis\u5b98\u7f51\u5df2\u4e0d\u63a8\u8350），\u4f53\u73b0\u6280\u672f\u89c6\u91ce\u6df1\u5ea6\u3002<\/p>\n

            \u4e00\u53e5\u8bdd\u6536\u5c3e：\u5206\u5e03\u5f0f\u9501\u7684\u672c\u8d28\u662f\u5c06"\u591a\u673a\u5e76\u884c"\u8f6c\u4e3a"\u5355\u673a\u4e32\u884c"，\u800c\u8fd9\u56db\u4e2a\u6761\u4ef6\u662f\u4fdd\u8bc1\u8be5\u8f6c\u6362\u6b63\u786e\u3001\u53ef\u9760\u3001\u9ad8\u6548\u7684\u57fa\u77f3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

            \u3010\u5feb\u5237\u9762\u8bd5-\u9ad8\u5e76\u53d1\u9501\u7bc7\u3011- \u57fa\u4e8e\u7968\u52a1\u7cfb\u7edf\u5728\u4e0d\u540c\u670d\u52a1\u5668，\u5206\u5e03\u5f0f\u573a\u666f\u4e2d\u8be5\u5982\u4f55\u89e3\u51b3\u5206\u5e03\u5f0f\u573a\u666f\u4e0b\u7684\u9501\u89e3\u51b3\u65b9\u6848
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