{"id":201809,"date":"2025-05-10T09:50:26","date_gmt":"2025-05-10T01:50:26","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201809\/"},"modified":"2025-05-10T09:50:26","modified_gmt":"2025-05-10T01:50:26","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8springboot%e4%b8%ad%e4%bd%bf%e7%94%a8redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201809\/","title":{"rendered":"\u5982\u4f55\u5728SpringBoot\u4e2d\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u5728SpringBoot\u4e2d\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60\u6570\u636e\u5e93<\/span>\uff0c\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u5728SpringBoot\u4e2d\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u5206\u5e03\u5f0f\u9501\u3001SpringBootRedis<\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n

\u4e00\u3002Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u539f\u7406<\/h2>\n

\u4e3a\u4ec0\u4e48\u9700\u8981\u5206\u5e03\u5f0f\u9501<\/strong><\/h3>\n

\u5728\u804a\u5206\u5e03\u5f0f\u9501\u4e4b\u524d\uff0c\u6709\u5fc5\u8981\u5148\u89e3\u91ca\u4e00\u4e0b\uff0c\u4e3a\u4ec0\u4e48\u9700\u8981\u5206\u5e03\u5f0f\u9501<\/code>\u3002<\/p>\n

\u4e0e\u5206\u5e03\u5f0f\u9501\u76f8\u5bf9\u5c31\u7684\u662f\u5355\u673a\u9501\uff0c\u6211\u4eec\u5728\u5199\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u65f6\uff0c\u907f\u514d\u540c\u65f6\u64cd\u4f5c\u4e00\u4e2a\u5171\u4eab\u53d8\u91cf\u4ea7\u751f\u6570\u636e\u95ee\u9898\uff0c\u901a\u5e38\u4f1a\u4f7f\u7528\u4e00\u628a\u9501\u6765\u4e92\u65a5\u4ee5\u4fdd\u8bc1\u5171\u4eab\u53d8\u91cf\u7684\u6b63\u786e\u6027\uff0c\u5176\u4f7f\u7528\u8303\u56f4\u662f\u5728\u540c\u4e00\u4e2a\u8fdb\u7a0b\u4e2d\u3002\u5982\u679c\u6362\u505a\u662f\u591a\u4e2a\u8fdb\u7a0b\uff0c\u9700\u8981\u540c\u65f6\u64cd\u4f5c\u4e00\u4e2a\u5171\u4eab\u8d44\u6e90\uff0c\u5982\u4f55\u4e92\u65a5\u5462\uff1f\u73b0\u5728\u7684\u4e1a\u52a1\u5e94\u7528\u901a\u5e38\u662f\u5fae\u670d\u52a1\u67b6\u6784\uff0c\u8fd9\u4e5f\u610f\u5473\u7740\u4e00\u4e2a\u5e94\u7528\u4f1a\u90e8\u7f72\u591a\u4e2a\u8fdb\u7a0b\uff0c\u591a\u4e2a\u8fdb\u7a0b\u5982\u679c\u9700\u8981\u4fee\u6539MySQL\u4e2d\u7684\u540c\u4e00\u884c\u8bb0\u5f55\uff0c\u4e3a\u4e86\u907f\u514d\u64cd\u4f5c\u4e71\u5e8f\u5bfc\u81f4\u810f\u6570\u636e\uff0c\u6b64\u65f6\u5c31\u9700\u8981\u5f15\u5165\u5206\u5e03\u5f0f\u9501\u4e86\u3002<\/p>\n

<\/p>\n

\u60f3\u8981\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u5fc5\u987b\u501f\u52a9\u4e00\u4e2a\u5916\u90e8\u7cfb\u7edf\uff0c\u6240\u6709\u8fdb\u7a0b\u90fd\u53bb\u8fd9\u4e2a\u7cfb\u7edf\u4e0a\u7533\u8bf7\u52a0\u9501\u3002\u800c\u8fd9\u4e2a\u5916\u90e8\u7cfb\u7edf\uff0c\u5fc5\u987b\u8981\u5b9e\u73b0\u4e92\u65a5\u80fd\u529b\uff0c\u5373\u4e24\u4e2a\u8bf7\u6c42\u540c\u65f6\u8fdb\u6765\uff0c\u53ea\u4f1a\u7ed9\u4e00\u4e2a\u8fdb\u7a0b\u52a0\u9501\u6210\u529f\uff0c\u53e6\u4e00\u4e2a\u5931\u8d25\u3002\u8fd9\u4e2a\u5916\u90e8\u7cfb\u7edf\u53ef\u4ee5\u662f\u6570\u636e\u5e93\uff0c\u4e5f\u53ef\u4ee5\u662fRedis\u6216Zookeeper\uff0c\u4f46\u4e3a\u4e86\u8ffd\u6c42\u6027\u80fd\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u9009\u62e9\u4f7f\u7528Redis\u6216Zookeeper\u6765\u505a\u3002<\/p>\n

Redis\u672c\u8eab\u53ef\u4ee5\u88ab\u591a\u4e2a\u5ba2\u6237\u7aef\u5171\u4eab\u8bbf\u95ee\uff0c\u6b63\u597d\u5c31\u662f\u4e00\u4e2a\u5171\u4eab\u5b58\u50a8\u7cfb\u7edf\uff0c\u53ef\u4ee5\u7528\u6765\u4fdd\u5b58\u5206\u5e03\u5f0f\u9501\u3002\u800c\u4e14 Redis \u7684\u8bfb\u5199\u6027\u80fd\u9ad8\uff0c\u53ef\u4ee5\u5e94\u5bf9\u9ad8\u5e76\u53d1\u7684\u9501\u64cd\u4f5c\u573a\u666f\u3002\u672c\u6587\u4e3b\u8981\u63a2\u8ba8\u5982\u4f55\u57fa\u4e8eRedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u4ee5\u53ca\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u9762\u4e34\u7684\u95ee\u9898\u3002<\/p>\n

\u5206\u5e03\u5f0f\u9501\u5982\u4f55\u5b9e\u73b0<\/strong><\/h3>\n

\u4f5c\u4e3a\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0\u8fc7\u7a0b\u4e2d\u7684\u5171\u4eab\u5b58\u50a8\u7cfb\u7edf\uff0cRedis\u53ef\u4ee5\u4f7f\u7528\u952e\u503c\u5bf9\u6765\u4fdd\u5b58\u9501\u53d8\u91cf\uff0c\u5728\u63a5\u6536\u548c\u5904\u7406\u4e0d\u540c\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u52a0\u9501\u548c\u91ca\u653e\u9501\u7684\u64cd\u4f5c\u8bf7\u6c42\u3002\u90a3\u4e48\uff0c\u952e\u503c\u5bf9\u7684\u952e\u548c\u503c\u5177\u4f53\u662f\u600e\u4e48\u5b9a\u7684\u5462\uff1f\u6211\u4eec\u8981\u8d4b\u4e88\u9501\u53d8\u91cf\u4e00\u4e2a\u53d8\u91cf\u540d\uff0c\u628a\u8fd9\u4e2a\u53d8\u91cf\u540d\u4f5c\u4e3a\u952e\u503c\u5bf9\u7684\u952e\uff0c\u800c\u9501\u53d8\u91cf\u7684\u503c\uff0c\u5219\u662f\u952e\u503c\u5bf9\u7684\u503c\uff0c\u8fd9\u6837\u4e00\u6765\uff0cRedis\u5c31\u80fd\u4fdd\u5b58\u9501\u53d8\u91cf\u4e86\uff0c\u5ba2\u6237\u7aef\u4e5f\u5c31\u53ef\u4ee5\u901a\u8fc7Redis\u7684\u547d\u4ee4\u64cd\u4f5c\u6765\u5b9e\u73b0\u9501\u64cd\u4f5c\u3002<\/p>\n

\u60f3\u8981\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u5fc5\u987b\u8981\u6c42Redis\u6709\u4e92\u65a5\u7684\u80fd\u529b\u3002\u53ef\u4ee5\u4f7f\u7528SETNX\u547d\u4ee4\uff0c\u5176\u542b\u4e49\u662fSET IF NOT EXIST\uff0c\u5373\u5982\u679ckey\u4e0d\u5b58\u5728\uff0c\u624d\u4f1a\u8bbe\u7f6e\u5b83\u7684\u503c\uff0c\u5426\u5219\u4ec0\u4e48\u4e5f\u4e0d\u505a\u3002\u4e24\u4e2a\u5ba2\u6237\u7aef\u8fdb\u7a0b\u53ef\u4ee5\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\uff0c\u8fbe\u5230\u4e92\u65a5\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n

\u4ee5\u4e0b\u5c55\u793a\u4e86Redis\u4f7f\u7528key\/value\u5bf9\u4fdd\u5b58\u9501\u53d8\u91cf\uff0c\u4ee5\u53ca\u4e24\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u8bf7\u6c42\u52a0\u9501\u7684\u64cd\u4f5c\u8fc7\u7a0b\u3002<\/p>\n

<\/p>\n

\u52a0\u9501\u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u52a0\u9501\u6210\u529f\u7684\u5ba2\u6237\u7aef\uff0c\u5c31\u53ef\u4ee5\u53bb\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\uff0c\u4f8b\u5982\uff0c\u4fee\u6539MySQL\u7684\u67d0\u4e00\u884c\u6570\u636e\u3002\u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u8fd8\u8981\u53ca\u65f6\u91ca\u653e\u9501\uff0c\u7ed9\u540e\u6765\u8005\u8ba9\u51fa\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u7684\u673a\u4f1a\u3002\u5982\u4f55\u91ca\u653e\u9501\u5462\uff1f\u76f4\u63a5\u4f7f\u7528DEL\u547d\u4ee4\u5220\u9664\u8fd9\u4e2akey\u5373\u53ef\u3002\u8fd9\u4e2a\u903b\u8f91\u975e\u5e38\u7b80\u5355\uff0c\u6574\u4f53\u7684\u6d41\u7a0b\u5199\u6210\u4f2a\u4ee3\u7801\u5c31\u662f\u4e0b\u9762\u8fd9\u6837\u3002<\/p>\n

\/\/ \u52a0\u9501\nSETNX lock_key 1\n\/\/ \u4e1a\u52a1\u903b\u8f91\nDO THINGS\n\/\/ \u91ca\u653e\u9501\nDEL lock_key\n\n<\/pre>\n
\u4f46\u662f\uff0c\u4ee5\u4e0a\u5b9e\u73b0\u5b58\u5728\u4e00\u4e2a\u5f88\u5927\u7684\u95ee\u9898\uff0c\u5f53\u5ba2\u6237\u7aef1\u62ff\u5230\u9501\u540e\uff0c\u5982\u679c\u53d1\u751f\u4e0b\u9762\u7684\u573a\u666f\uff0c\u5c31\u4f1a\u9020\u6210\u6b7b\u9501\u3002<\/p>\n
\u7a0b\u5e8f\u5904\u7406\u4e1a\u52a1\u903b\u8f91\u5f02\u5e38\uff0c\u6ca1\u53ca\u65f6\u91ca\u653e\u9501\u8fdb\u7a0b\u6302\u4e86\uff0c\u6ca1\u673a\u4f1a\u91ca\u653e\u9501<\/p>\n
\u4ee5\u4e0a\u60c5\u51b5\u4f1a\u5bfc\u81f4\u5df2\u7ecf\u83b7\u5f97\u9501\u7684\u5ba2\u6237\u7aef\u4e00\u76f4\u5360\u7528\u9501\uff0c\u5176\u4ed6\u5ba2\u6237\u7aef\u6c38\u8fdc\u65e0\u6cd5\u83b7\u53d6\u5230\u9501\u3002<\/p>\n
\u5982\u4f55\u907f\u514d\u6b7b\u9501<\/strong><\/h3>\n
\u4e3a\u4e86\u89e3\u51b3\u4ee5\u4e0a\u6b7b\u9501\u95ee\u9898\uff0c\u6700\u5bb9\u6613\u60f3\u5230\u7684\u65b9\u6848\u662f\u5728\u7533\u8bf7\u9501\u65f6\uff0c\u5728Redis\u4e2d\u5b9e\u73b0\u65f6\uff0c\u7ed9\u9501\u8bbe\u7f6e\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\uff0c\u5047\u8bbe\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u95f4\u4e0d\u4f1a\u8d85\u8fc710s\uff0c\u90a3\u4e48\u52a0\u9501\u65f6\uff0c\u7ed9\u8fd9\u4e2akey\u8bbe\u7f6e10s\u8fc7\u671f\u5373\u53ef\u3002<\/p>\n
\u4f46\u4ee5\u4e0a\u64cd\u4f5c\u8fd8\u662f\u6709\u95ee\u9898\uff0c\u52a0\u9501\u3001\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u662f2\u6761\u547d\u4ee4\uff0c\u6709\u53ef\u80fd\u53ea\u6267\u884c\u4e86\u7b2c\u4e00\u6761\uff0c\u7b2c\u4e8c\u6761\u5374\u6267\u884c\u5931\u8d25<\/code>\uff0c\u4f8b\u5982\uff1a<\/p>\n
\n
1.SETNX\u6267\u884c\u6210\u529f\uff0c\u6267\u884cEXPIRE\u65f6\u7531\u4e8e\u7f51\u7edc\u95ee\u9898\uff0c\u6267\u884c\u5931\u8d25
2.SETNX\u6267\u884c\u6210\u529f\uff0cRedis\u5f02\u5e38\u5b95\u673a\uff0cEXPIRE\u6ca1\u6709\u673a\u4f1a\u6267\u884c
3.SETNX\u6267\u884c\u6210\u529f\uff0c\u5ba2\u6237\u7aef\u5f02\u5e38\u5d29\u6e83\uff0cEXPIRE\u6ca1\u6709\u673a\u4f1a\u6267\u884c<\/p>\n<\/blockquote>\n
\u603b\u4e4b\u8fd9\u4e24\u6761\u547d\u4ee4\u5982\u679c\u4e0d\u80fd\u4fdd\u8bc1\u662f\u539f\u5b50\u64cd\u4f5c\uff0c\u5c31\u6709\u6f5c\u5728\u7684\u98ce\u9669\u5bfc\u81f4\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u5931\u8d25\uff0c\u4f9d\u65e7\u6709\u53ef\u80fd\u53d1\u751f\u6b7b\u9501\u95ee\u9898<\/code>\u3002\u5e78\u597d\u5728Redis 2.6.12\u4e4b\u540e\uff0cRedis\u6269\u5c55\u4e86SET\u547d\u4ee4\u7684\u53c2\u6570\uff0c\u53ef\u4ee5\u5728SET\u7684\u540c\u65f6\u6307\u5b9aEXPIRE\u65f6\u95f4\uff0c\u8fd9\u6761\u64cd\u4f5c\u662f\u539f\u5b50\u7684\uff0c\u4f8b\u5982\u4ee5\u4e0b\u547d\u4ee4\u662f\u8bbe\u7f6e\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u4e3a10\u79d2\u3002<\/p>\n
\n
SET lock_key 1 EX 10 NX<\/p>\n<\/blockquote>\n
\u81f3\u6b64\uff0c\u89e3\u51b3\u4e86\u6b7b\u9501\u95ee\u9898\uff0c\u4f46\u8fd8\u662f\u6709\u5176\u4ed6\u95ee\u9898\u3002\u60f3\u50cf\u4e0b\u9762\u8fd9\u4e2a\u8fd9\u6837\u4e00\u79cd\u573a\u666f\uff1a<\/p>\n
<\/p>\n
    \n
  1. \u5ba2\u6237\u7aef1\u52a0\u9501\u6210\u529f\uff0c\u5f00\u59cb\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90<\/li>\n
  2. \u5ba2\u6237\u7aef1\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u8017\u65f6\u592a\u4e45\uff0c\u8d85\u8fc7\u4e86\u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u9501\u5931\u6548\uff08\u9501\u88ab\u81ea\u52a8\u91ca\u653e\uff09<\/li>\n
  3. \u5ba2\u6237\u7aef2\u52a0\u9501\u6210\u529f\uff0c\u5f00\u59cb\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90<\/li>\n
  4. \u5ba2\u6237\u7aef1\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u5b8c\u6210\uff0c\u5728finally\u5757\u4e2d\u624b\u52a8\u91ca\u653e\u9501\uff0c\u4f46\u6b64\u65f6\u5b83\u91ca\u653e\u7684\u662f\u5ba2\u6237\u7aef2\u7684\u9501\u3002<\/li>\n<\/ol>\n
    \u8fd9\u91cc\u5b58\u5728\u4e24\u4e2a\u4e25\u91cd\u7684\u95ee\u9898\uff1a<\/p>\n
      \n
    • \u9501\u8fc7\u671f<\/li>\n
    • \u91ca\u653e\u4e86\u522b\u4eba\u7684\u9501<\/li>\n<\/ul>\n
      \u7b2c1\u4e2a\u95ee\u9898\u662f\u8bc4\u4f30\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u7684\u65f6\u95f4\u4e0d\u51c6\u786e\u5bfc\u81f4\u7684\uff0c\u5982\u679c\u53ea\u662f\u4e00\u5473\u589e\u5927\u8fc7\u671f\u65f6\u95f4\uff0c\u53ea\u80fd\u7f13\u89e3\u95ee\u9898\u964d\u4f4e\u51fa\u73b0\u95ee\u9898\u7684\u6982\u7387\uff0c\u4f9d\u65e7\u65e0\u6cd5\u5f7b\u5e95\u89e3\u51b3\u95ee\u9898\u3002\u539f\u56e0\u5728\u4e8e\u5ba2\u6237\u7aef\u5728\u62ff\u5230\u9501\u4e4b\u540e\uff0c\u5728\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u65f6\uff0c\u9047\u5230\u7684\u573a\u666f\u662f\u5f88\u590d\u6742\u7684\uff0c\u65e2\u7136\u662f\u9884\u4f30\u7684\u65f6\u95f4\uff0c\u4e5f\u53ea\u80fd\u662f\u5927\u81f4\u7684\u8ba1\u7b97\uff0c\u4e0d\u53ef\u80fd\u8986\u76d6\u6240\u6709\u5bfc\u81f4\u8017\u65f6\u53d8\u957f\u7684\u573a\u666f<\/code>\u3002<\/p>\n
      \u7b2c2\u4e2a\u95ee\u9898\u662f\u91ca\u653e\u4e86\u522b\u4eba\u7684\u9501\uff0c\u539f\u56e0\u5728\u4e8e\u91ca\u653e\u9501\u7684\u64cd\u4f5c\u662f\u65e0\u8111\u64cd\u4f5c\uff0c\u5e76\u6ca1\u6709\u68c0\u67e5\u8fd9\u628a\u9501\u7684\u5f52\u5c5e\uff0c\u8fd9\u6837\u89e3\u9501\u4e0d\u4e25\u8c28\u3002\u5982\u4f55\u89e3\u51b3\u5462\uff1f<\/p>\n
      \u9501\u88ab\u522b\u4eba\u7ed9\u91ca\u653e\u4e86<\/strong><\/h3>\n
      \u89e3\u51b3\u529e\u6cd5\u662f\uff0c\u5ba2\u6237\u7aef\u5728\u52a0\u9501\u65f6\uff0c\u8bbe\u7f6e\u4e00\u4e2a\u53ea\u6709\u81ea\u5df1\u77e5\u9053\u7684\u552f\u4e00\u6807\u8bc6\u8fdb\u53bb\uff0c\u4f8b\u5982\u53ef\u4ee5\u662f\u81ea\u5df1\u7684\u7ebf\u7a0bID<\/code>\uff0c\u5982\u679c\u662fredis\u5b9e\u73b0\uff0c\u5c31\u662fSET key unique_value EX 10 NX\u3002\u4e4b\u540e\u5728\u91ca\u653e\u9501\u65f6\uff0c\u8981\u5148\u5224\u65ad\u8fd9\u628a\u9501\u662f\u5426\u5f52\u81ea\u5df1\u6301\u6709\uff0c\u53ea\u6709\u662f\u81ea\u5df1\u7684\u624d\u80fd\u91ca\u653e\u5b83\u3002<\/p>\n
      \/\/\u91ca\u653e\u9501 \u6bd4\u8f83unique_value\u662f\u5426\u76f8\u7b49\uff0c\u907f\u514d\u8bef\u91ca\u653e\nif redis.get(\"key\") == unique_value then\n    return redis.del(\"key\")\n\n<\/pre>\n
      \u8fd9\u91cc\u91ca\u653e\u9501\u4f7f\u7528\u7684\u662fGET + DEL\u4e24\u6761\u547d\u4ee4\uff0c\u8fd9\u65f6\u53c8\u4f1a\u9047\u5230\u539f\u5b50\u6027<\/code>\u95ee\u9898\u4e86\u3002<\/p>\n
        \n
      1. \u5ba2\u6237\u7aef1\u6267\u884cGET\uff0c\u5224\u65ad\u9501\u662f\u81ea\u5df1\u7684<\/li>\n
      2. \u5ba2\u6237\u7aef2\u6267\u884c\u4e86SET\u547d\u4ee4\uff0c\u5f3a\u5236\u83b7\u53d6\u5230\u9501\uff08\u867d\u7136\u53d1\u751f\u6982\u5ff5\u5f88\u4f4e\uff0c\u4f46\u8981\u4e25\u8c28\u8003\u8651\u9501\u7684\u5b89\u5168\u6027\uff09<\/li>\n
      3. \u5ba2\u6237\u7aef1\u6267\u884cDEL\uff0c\u5374\u91ca\u653e\u4e86\u5ba2\u6237\u7aef2\u7684\u9501<\/li>\n<\/ol>\n
        \u7531\u6b64\u53ef\u89c1\uff0c\u4ee5\u4e0aGET + DEL\u4e24\u4e2a\u547d\u4ee4\u8fd8\u662f\u5fc5\u987b\u539f\u5b50\u7684\u6267\u884c\u624d\u884c\u3002\u600e\u6837\u539f\u5b50\u6267\u884c\u4e24\u6761\u547d\u4ee4\u5462\uff1f\u7b54\u6848\u662fLua\u811a\u672c\uff0c\u53ef\u4ee5\u628a\u4ee5\u4e0a\u903b\u8f91\u5199\u6210Lua\u811a\u672c\uff0c\u8ba9Redis\u6267\u884c\u3002\u56e0\u4e3aRedis\u5904\u7406\u6bcf\u4e2a\u8bf7\u6c42\u662f\u5355\u7ebf\u7a0b\u6267\u884c\u7684\uff0c\u5728\u6267\u884c\u4e00\u4e2aLua\u811a\u672c\u65f6\u5176\u5b83\u8bf7\u6c42\u5fc5\u987b\u7b49\u5f85\uff0c\u76f4\u5230\u8fd9\u4e2aLua\u811a\u672c\u5904\u7406\u5b8c\u6210<\/code>\uff0c\u8fd9\u6837\u4e00\u6765GET+DEL\u4e4b\u95f4\u5c31\u4e0d\u4f1a\u6709\u5176\u4ed6\u547d\u4ee4\u6267\u884c\u4e86\u3002<\/p>\n
        \u4ee5\u4e0b\u662f\u4f7f\u7528Lua\u811a\u672c\uff08unlock.script\uff09\u5b9e\u73b0\u7684\u91ca\u653e\u9501\u64cd\u4f5c\u7684\u4f2a\u4ee3\u7801\uff0c\u5176\u4e2d\uff0cKEYS[1]\u8868\u793alock_key\uff0cARGV[1]\u662f\u5f53\u524d\u5ba2\u6237\u7aef\u7684\u552f\u4e00\u6807\u8bc6\uff0c\u8fd9\u4e24\u4e2a\u503c\u90fd\u662f\u6211\u4eec\u5728\u6267\u884c Lua\u811a\u672c\u65f6\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u7684\u3002<\/p>\n
        \/\/Lua\u811a\u672c\u8bed\u8a00\uff0c\u91ca\u653e\u9501 \u6bd4\u8f83unique_value\u662f\u5426\u76f8\u7b49\uff0c\u907f\u514d\u8bef\u91ca\u653e\nif redis.call(\"get\",KEYS[1]) == ARGV[1] then\n    return redis.call(\"del\",KEYS[1])\nelse\n    return 0\nend\n\n<\/pre>\n
        \u6700\u540e\u6211\u4eec\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff0c\u5373\u53ef<\/p>\n
        redis-cli  --eval  unlock.script lock_key , unique_value \n<\/pre>\n
        \u8fd9\u6837\u4e00\u8def\u4f18\u5148\u4e0b\u6765\uff0c\u6574\u4e2a\u52a0\u9501\u3001\u89e3\u9501\u6d41\u7a0b\u5c31\u66f4\u4e25\u8c28\u4e86\uff0c\u5148\u5c0f\u7ed3\u4e00\u4e0b\uff0c\u57fa\u4e8eRedis\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\uff0c\u4e00\u4e2a\u4e25\u8c28\u7684\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n
          \n
        1. \u52a0\u9501\u65f6\u8981\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4SET lock_key unique_value EX expire_time NX<\/li>\n
        2. \u64cd\u4f5c\u5171\u4eab\u8d44\u6e90<\/li>\n
        3. \u91ca\u653e\u9501\uff1aLua\u811a\u672c\uff0c\u5148GET\u5224\u65ad\u9501\u662f\u5426\u5f52\u5c5e\u81ea\u5df1\uff0c\u518dDEL\u91ca\u653e\u9501<\/li>\n<\/ol>\n
          \u6709\u4e86\u8fd9\u4e2a\u4e25\u8c28\u7684\u9501\u6a21\u578b\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u91cd\u65b0\u601d\u8003\u4e4b\u524d\u7684\u90a3\u4e2a\u95ee\u9898\uff0c\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u4e0d\u597d\u8bc4\u4f30\u600e\u4e48\u529e\u3002<\/p>\n
          \u5982\u4f55\u786e\u5b9a\u9501\u7684\u8fc7\u671f\u65f6\u95f4<\/strong><\/h3>\n
          \u524d\u9762\u63d0\u5230\u8fc7\uff0c\u8fc7\u671f\u65f6\u95f4\u5982\u679c\u8bc4\u4f30\u5f97\u4e0d\u597d\uff0c\u8fd9\u4e2a\u9501\u5c31\u4f1a\u6709\u63d0\u524d\u8fc7\u671f\u7684\u98ce\u9669\uff0c\u4e00\u79cd\u59a5\u534f\u7684\u89e3\u51b3\u65b9\u6848\u662f\uff0c\u5c3d\u91cf\u5197\u4f59\u8fc7\u671f\u65f6\u95f4\uff0c\u964d\u4f4e\u9501\u63d0\u524d\u8fc7\u671f\u7684\u6982\u7387\uff0c\u4f46\u8fd9\u4e2a\u65b9\u6848\u5e76\u4e0d\u80fd\u5b8c\u7f8e\u89e3\u51b3\u95ee\u9898\u3002\u662f\u5426\u53ef\u4ee5\u8bbe\u7f6e\u8fd9\u6837\u7684\u65b9\u6848\uff0c\u52a0\u9501\u65f6\uff0c\u5148\u8bbe\u7f6e\u4e00\u4e2a\u9884\u4f30\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u7136\u540e\u5f00\u542f\u4e00\u4e2a\u5b88\u62a4\u7ebf\u7a0b\uff0c\u5b9a\u65f6\u53bb\u68c0\u6d4b\u8fd9\u4e2a\u9501\u7684\u5931\u6548\u65f6\u95f4\uff0c\u5982\u679c\u9501\u5feb\u8981\u8fc7\u671f\u4e86\uff0c\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\u8fd8\u672a\u5b8c\u6210\uff0c\u90a3\u4e48\u5c31\u81ea\u52a8\u5bf9\u9501\u8fdb\u884c\u7eed\u671f\uff0c\u91cd\u65b0\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4<\/code>\u3002<\/p>\n
          \u8fd9\u662f\u4e00\u79cd\u6bd4\u8f83\u597d\u7684\u65b9\u6848\uff0c\u5df2\u7ecf\u6709\u4e00\u4e2a\u5e93\u628a\u8fd9\u4e9b\u5de5\u4f5c\u90fd\u5c01\u88c5\u597d\u4e86\uff0c\u5b83\u5c31\u662fRedisson\u3002Redisson\u662f\u4e00\u4e2aJava\u8bed\u8a00\u5b9e\u73b0\u7684Redis SDK\u5ba2\u6237\u7aef\uff0c\u5728\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u65f6\uff0c\u5b83\u5c31\u91c7\u7528\u4e86\u81ea\u52a8\u7eed\u671f\u7684\u65b9\u6848\u6765\u907f\u514d\u9501\u8fc7\u671f\uff0c\u8fd9\u4e2a\u5b88\u62a4\u7ebf\u7a0b\u6211\u4eec\u4e00\u822c\u53eb\u5b83\u770b\u95e8\u72d7\u7ebf\u7a0b\u3002\u8fd9\u4e2aSDK\u63d0\u4f9b\u7684API\u975e\u5e38\u53cb\u597d\uff0c\u5b83\u53ef\u4ee5\u50cf\u64cd\u4f5c\u672c\u5730\u9501\u4e00\u6837\u64cd\u4f5c\u5206\u5e03\u5f0f\u9501\u3002\u5ba2\u6237\u7aef\u4e00\u65e6\u52a0\u9501\u6210\u529f\uff0c\u5c31\u4f1a\u542f\u52a8\u4e00\u4e2awatch dog\u770b\u95e8\u72d7\u7ebf\u7a0b\uff0c\u5b83\u662f\u4e00\u4e2a\u540e\u53f0\u7ebf\u7a0b\uff0c\u4f1a\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\uff08\u8fd9\u6bb5\u65f6\u95f4\u7684\u957f\u5ea6\u4e0e\u8bbe\u7f6e\u7684\u9501\u7684\u8fc7\u671f\u65f6\u95f4\u6709\u5173\uff09\u68c0\u67e5\u4e00\u4e0b\uff0c\u5982\u679c\u68c0\u67e5\u65f6\u5ba2\u6237\u7aef\u8fd8\u6301\u6709\u9501key\uff08\u4e5f\u5c31\u662f\u8bf4\u8fd8\u5728\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90\uff09\uff0c\u90a3\u4e48\u5c31\u4f1a\u5ef6\u957f\u9501key\u7684\u751f\u5b58\u65f6\u95f4\u3002<\/p>\n
          <\/p>\n
          \u90a3\u5982\u679c\u5ba2\u6237\u7aef\u5728\u52a0\u9501\u6210\u529f\u540e\u5c31\u5b95\u673a\u4e86\u5462\uff1f\u5b95\u673a\u4e86\u90a3\u4e48\u770b\u95e8\u72d7\u4efb\u52a1\u5c31\u4e0d\u5b58\u5728\u4e86\uff0c\u4e5f\u5c31\u65e0\u6cd5\u4e3a\u9501\u7eed\u671f\u4e86\uff0c\u9501\u5230\u671f\u81ea\u52a8\u5931\u6548\u3002<\/p>\n
          Redis\u7684\u90e8\u7f72\u65b9\u5f0f\u5bf9\u9501\u7684\u5f71\u54cd<\/strong><\/h3>\n
          \u4e0a\u9762\u8ba8\u8bba\u7684\u60c5\u51b5\uff0c\u90fd\u662f\u9501\u5728\u5355\u4e2aRedis \u5b9e\u4f8b\u4e2d\u53ef\u80fd\u4ea7\u751f\u7684\u95ee\u9898\uff0c\u5e76\u6ca1\u6709\u6d89\u53ca\u5230Redis\u7684\u90e8\u7f72\u67b6\u6784\u7ec6\u8282\u3002<\/p>\n
          Redis\u53d1\u5c55\u5230\u73b0\u5728\uff0c\u51e0\u79cd\u5e38\u89c1\u7684\u90e8\u7f72\u67b6\u6784\u6709\uff1a<\/p>\n
            \n
          • \u5355\u673a\u6a21\u5f0f\uff1b<\/li>\n
          • \u4e3b\u4ece\u6a21\u5f0f\uff1b<\/li>\n
          • \u54e8\u5175\uff08sentinel\uff09\u6a21\u5f0f\uff1b<\/li>\n
          • \u96c6\u7fa4\u6a21\u5f0f\uff1b<\/li>\n<\/ul>\n
            \u6211\u4eec\u4f7f\u7528Redis\u65f6\uff0c\u4e00\u822c\u4f1a\u91c7\u7528\u4e3b\u4ece\u96c6\u7fa4+\u54e8\u5175\u7684\u6a21\u5f0f\u90e8\u7f72\uff0c\u54e8\u5175\u7684\u4f5c\u7528\u5c31\u662f\u76d1\u6d4bredis\u8282\u70b9\u7684\u8fd0\u884c\u72b6\u6001\u3002\u666e\u901a\u7684\u4e3b\u4ece\u6a21\u5f0f\uff0c\u5f53master\u5d29\u6e83\u65f6\uff0c\u9700\u8981\u624b\u52a8\u5207\u6362\u8ba9slave\u6210\u4e3amaster\uff0c\u4f7f\u7528\u4e3b\u4ece+\u54e8\u5175\u7ed3\u5408\u7684\u597d\u5904\u5728\u4e8e\uff0c\u5f53master\u5f02\u5e38\u5b95\u673a\u65f6\uff0c\u54e8\u5175\u53ef\u4ee5\u5b9e\u73b0\u6545\u969c\u81ea\u52a8\u5207\u6362\uff0c\u628aslave\u63d0\u5347\u4e3a\u65b0\u7684master\uff0c\u7ee7\u7eed\u63d0\u4f9b\u670d\u52a1\uff0c\u4ee5\u6b64\u4fdd\u8bc1\u53ef\u7528\u6027<\/code>\u3002\u90a3\u4e48\u5f53\u4e3b\u4ece\u53d1\u751f\u5207\u6362\u65f6\uff0c\u5206\u5e03\u5f0f\u9501\u4f9d\u65e7\u5b89\u5168\u5417\uff1f<\/p>\n
            <\/p>\n
            \u60f3\u50cf\u8fd9\u6837\u7684\u573a\u666f\uff1a<\/p>\n
              \n
            1. \u5ba2\u6237\u7aef1\u5728master\u4e0a\u6267\u884cSET\u547d\u4ee4\uff0c\u52a0\u9501\u6210\u529f<\/li>\n
            2. \u6b64\u65f6\uff0cmaster\u5f02\u5e38\u5b95\u673a\uff0cSET\u547d\u4ee4\u8fd8\u672a\u540c\u6b65\u5230slave\u4e0a\uff08\u4e3b\u4ece\u590d\u5236\u662f\u5f02\u6b65\u7684\uff09<\/li>\n
            3. \u54e8\u5175\u5c06slave\u63d0\u5347\u4e3a\u65b0\u7684master\uff0c\u4f46\u8fd9\u4e2a\u9501\u5728\u65b0\u7684master\u4e0a\u4e22\u5931\u4e86\uff0c\u5bfc\u81f4\u5ba2\u6237\u7aef2\u6765\u52a0\u9501\u6210\u529f\u4e86\uff0c\u4e24\u4e2a\u5ba2\u6237\u7aef\u5171\u540c\u64cd\u4f5c\u5171\u4eab\u8d44\u6e90<\/li>\n<\/ol>\n
              \u53ef\u89c1\uff0c\u5f53\u5f15\u5165Redis\u526f\u672c\u540e\uff0c\u5206\u5e03\u5f0f\u9501\u8fd8\u662f\u53ef\u80fd\u53d7\u5230\u5f71\u54cd\u3002\u5373\u4f7fRedis\u901a\u8fc7sentinel\u4fdd\u8bc1\u9ad8\u53ef\u7528\uff0c\u5982\u679c\u8fd9\u4e2amaster\u8282\u70b9\u7531\u4e8e\u67d0\u4e9b\u539f\u56e0\u53d1\u751f\u4e86\u4e3b\u4ece\u5207\u6362\uff0c\u90a3\u4e48\u5c31\u4f1a\u51fa\u73b0\u9501\u4e22\u5931\u7684\u60c5\u51b5\u3002<\/p>\n
              \u96c6\u7fa4\u6a21\u5f0f+Redlock\u5b9e\u73b0\u9ad8\u53ef\u9760\u7684\u5206\u5e03\u5f0f\u9501<\/strong><\/p>\n
              \u4e3a\u4e86\u907f\u514dRedis\u5b9e\u4f8b\u6545\u969c\u800c\u5bfc\u81f4\u7684\u9501\u65e0\u6cd5\u5de5\u4f5c\u7684\u95ee\u9898\uff0cRedis\u7684\u5f00\u53d1\u8005 Antirez\u63d0\u51fa\u4e86\u5206\u5e03\u5f0f\u9501\u7b97\u6cd5Redlock\u3002Redlock\u7b97\u6cd5\u7684\u57fa\u672c\u601d\u8def\uff0c\u662f\u8ba9\u5ba2\u6237\u7aef\u548c\u591a\u4e2a\u72ec\u7acb\u7684Redis\u5b9e\u4f8b\u4f9d\u6b21\u8bf7\u6c42\u52a0\u9501\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u80fd\u591f\u548c\u534a\u6570\u4ee5\u4e0a\u7684\u5b9e\u4f8b\u6210\u529f\u5730\u5b8c\u6210\u52a0\u9501\u64cd\u4f5c\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u8ba4\u4e3a\uff0c\u5ba2\u6237\u7aef\u6210\u529f\u5730\u83b7\u5f97\u5206\u5e03\u5f0f\u9501\u4e86\uff0c\u5426\u5219\u52a0\u9501\u5931\u8d25<\/code>\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5373\u4f7f\u6709\u5355\u4e2aRedis\u5b9e\u4f8b\u53d1\u751f\u6545\u969c\uff0c\u56e0\u4e3a\u9501\u53d8\u91cf\u5728\u5176\u5b83\u5b9e\u4f8b\u4e0a\u4e5f\u6709\u4fdd\u5b58\uff0c\u6240\u4ee5\uff0c\u5ba2\u6237\u7aef\u4ecd\u7136\u53ef\u4ee5\u6b63\u5e38\u5730\u8fdb\u884c\u9501\u64cd\u4f5c\uff0c\u9501\u53d8\u91cf\u5e76\u4e0d\u4f1a\u4e22\u5931\u3002<\/p>\n
              \u6765\u5177\u4f53\u770b\u4e0bRedlock\u7b97\u6cd5\u7684\u6267\u884c\u6b65\u9aa4\u3002Redlock\u7b97\u6cd5\u7684\u5b9e\u73b0\u8981\u6c42Redis\u91c7\u7528\u96c6\u7fa4\u90e8\u7f72\u6a21\u5f0f\uff0c\u65e0\u54e8\u5175\u8282\u70b9\uff0c\u9700\u8981\u6709N\u4e2a\u72ec\u7acb\u7684Redis\u5b9e\u4f8b\uff08\u5b98\u65b9\u63a8\u8350\u81f3\u5c115\u4e2a\u5b9e\u4f8b\uff09\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u5206\u62103\u6b65\u6765\u5b8c\u6210\u52a0\u9501\u64cd\u4f5c\u3002<\/p>\n
              <\/p>\n
              \u7b2c\u4e00\u6b65\u662f\uff0c\u5ba2\u6237\u7aef\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u3002<\/p>\n
              \u7b2c\u4e8c\u6b65\u662f\uff0c\u5ba2\u6237\u7aef\u6309\u987a\u5e8f\u4f9d\u6b21\u5411N\u4e2aRedis\u5b9e\u4f8b\u6267\u884c\u52a0\u9501\u64cd\u4f5c\u3002<\/p>\n
              \u8fd9\u91cc\u7684\u52a0\u9501\u64cd\u4f5c\u548c\u5728\u5355\u5b9e\u4f8b\u4e0a\u6267\u884c\u7684\u52a0\u9501\u64cd\u4f5c\u4e00\u6837\uff0c\u4f7f\u7528SET\u547d\u4ee4\uff0c\u5e26\u4e0aNX\u3001EX\/PX\u9009\u9879\uff0c\u4ee5\u53ca\u5e26\u4e0a\u5ba2\u6237\u7aef\u7684\u552f\u4e00\u6807\u8bc6\u3002\u5f53\u7136\uff0c\u5982\u679c\u67d0\u4e2aRedis\u5b9e\u4f8b\u53d1\u751f\u6545\u969c\u4e86\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cRedlock\u7b97\u6cd5\u80fd\u591f\u7ee7\u7eed\u8fd0\u884c\uff0c\u6211\u4eec\u9700\u8981\u7ed9\u52a0\u9501\u64cd\u4f5c\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\u3002\u5982\u679c\u5ba2\u6237\u7aef\u5728\u548c\u4e00\u4e2aRedis\u5b9e\u4f8b\u8bf7\u6c42\u52a0\u9501\u65f6\uff0c\u4e00\u76f4\u5230\u8d85\u65f6\u90fd\u6ca1\u6709\u6210\u529f\uff0c\u90a3\u4e48\u6b64\u65f6\uff0c\u5ba2\u6237\u7aef\u4f1a\u548c\u4e0b\u4e00\u4e2aRedis\u5b9e\u4f8b\u7ee7\u7eed\u8bf7\u6c42\u52a0\u9501\u3002\u52a0\u9501\u64cd\u4f5c\u7684\u8d85\u65f6\u65f6\u95f4\u9700\u8981\u8fdc\u8fdc\u5730\u5c0f\u4e8e\u9501\u7684\u6709\u6548\u65f6\u95f4\uff0c\u4e00\u822c\u4e5f\u5c31\u662f\u8bbe\u7f6e\u4e3a\u51e0\u5341\u6beb\u79d2\u3002<\/p>\n
              \u7b2c\u4e09\u6b65\u662f\uff0c\u4e00\u65e6\u5ba2\u6237\u7aef\u5b8c\u6210\u4e86\u548c\u6240\u6709Redis\u5b9e\u4f8b\u7684\u52a0\u9501\u64cd\u4f5c\uff0c\u5ba2\u6237\u7aef\u5c31\u8981\u8ba1\u7b97\u6574\u4e2a\u52a0\u9501\u8fc7\u7a0b\u7684\u603b\u8017\u65f6\u3002<\/p>\n
              \u5ba2\u6237\u7aef\u53ea\u6709\u5728\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\u65f6\uff0c\u624d\u80fd\u8ba4\u4e3a\u662f\u52a0\u9501\u6210\u529f\uff0c\u6761\u4ef6\u4e00\u662f\u5ba2\u6237\u7aef\u4ece\u8d85\u8fc7\u534a\u6570\uff08\u5927\u4e8e\u7b49\u4e8e N\/2+1\uff09\u7684Redis\u5b9e\u4f8b\u4e0a\u6210\u529f\u83b7\u53d6\u5230\u4e86\u9501\uff1b\u6761\u4ef6\u4e8c\u662f\u5ba2\u6237\u7aef\u83b7\u53d6\u9501\u7684\u603b\u8017\u65f6\u6ca1\u6709\u8d85\u8fc7\u9501\u7684\u6709\u6548\u65f6\u95f4\u3002<\/code><\/p>\n
              \u4e3a\u4ec0\u4e48\u5927\u591a\u6570\u5b9e\u4f8b\u52a0\u9501\u6210\u529f\u624d\u80fd\u7b97\u6210\u529f\u5462\uff1f\u591a\u4e2aRedis\u5b9e\u4f8b\u4e00\u8d77\u6765\u7528\uff0c\u5176\u5b9e\u5c31\u7ec4\u6210\u4e86\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u3002\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u603b\u4f1a\u51fa\u73b0\u5f02\u5e38\u8282\u70b9\uff0c\u6240\u4ee5\u5728\u8c08\u8bba\u5206\u5e03\u5f0f\u7cfb\u7edf\u65f6\uff0c\u9700\u8981\u8003\u8651\u5f02\u5e38\u8282\u70b9\u8fbe\u5230\u591a\u5c11\u4e2a\uff0c\u4e5f\u4f9d\u65e7\u4e0d\u5f71\u54cd\u6574\u4e2a\u7cfb\u7edf\u7684\u6b63\u786e\u8fd0\u884c\u3002\u8fd9\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u5bb9\u9519\u95ee\u9898\uff0c\u8fd9\u4e2a\u95ee\u9898\u7684\u7ed3\u8bba\u662f\uff1a\u5982\u679c\u53ea\u5b58\u5728\u6545\u969c\u8282\u70b9\uff0c\u53ea\u8981\u5927\u591a\u6570\u8282\u70b9\u6b63\u5e38\uff0c\u90a3\u4e48\u6574\u4e2a\u7cfb\u7edf\u4f9d\u65e7\u53ef\u4ee5\u63d0\u4f9b\u6b63\u786e\u670d\u52a1\u3002<\/p>\n
              \u5728\u6ee1\u8db3\u4e86\u8fd9\u4e24\u4e2a\u6761\u4ef6\u540e\uff0c\u6211\u4eec\u9700\u8981\u91cd\u65b0\u8ba1\u7b97\u8fd9\u628a\u9501\u7684\u6709\u6548\u65f6\u95f4\uff0c\u8ba1\u7b97\u7684\u7ed3\u679c\u662f\u9501\u7684\u6700\u521d\u6709\u6548\u65f6\u95f4\u51cf\u53bb\u5ba2\u6237\u7aef\u4e3a\u83b7\u53d6\u9501\u7684\u603b\u8017\u65f6\u3002\u5982\u679c\u9501\u7684\u6709\u6548\u65f6\u95f4\u5df2\u7ecf\u6765\u4e0d\u53ca\u5b8c\u6210\u5171\u4eab\u6570\u636e\u7684\u64cd\u4f5c\u4e86\uff0c\u6211\u4eec\u53ef\u4ee5\u91ca\u653e\u9501\uff0c\u4ee5\u514d\u51fa\u73b0\u8fd8\u6ca1\u5b8c\u6210\u5171\u4eab\u8d44\u6e90\u64cd\u4f5c\uff0c\u9501\u5c31\u8fc7\u671f\u4e86\u7684\u60c5\u51b5<\/code>\u3002<\/p>\n
              \u5f53\u7136\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u5728\u548c\u6240\u6709\u5b9e\u4f8b\u6267\u884c\u5b8c\u52a0\u9501\u64cd\u4f5c\u540e\uff0c\u6ca1\u80fd\u540c\u65f6\u6ee1\u8db3\u8fd9\u4e24\u4e2a\u6761\u4ef6\uff0c\u90a3\u4e48\uff0c\u5ba2\u6237\u7aef\u5c31\u8981\u5411\u6240\u6709Redis\u8282\u70b9\u53d1\u8d77\u91ca\u653e\u9501\u7684\u64cd\u4f5c<\/code>\u3002\u4e3a\u4ec0\u4e48\u91ca\u653e\u9501\uff0c\u8981\u64cd\u4f5c\u6240\u6709\u7684\u8282\u70b9\u5462\uff0c\u4e0d\u80fd\u53ea\u64cd\u4f5c\u90a3\u4e9b\u52a0\u9501\u6210\u529f\u7684\u8282\u70b9\u5417\uff1f\u56e0\u4e3a\u5728\u67d0\u4e00\u4e2aRedis\u8282\u70b9\u52a0\u9501\u65f6\uff0c\u53ef\u80fd\u56e0\u4e3a\u7f51\u7edc\u539f\u56e0\u5bfc\u81f4\u52a0\u9501\u5931\u8d25\uff0c\u4f8b\u5982\u4e00\u4e2a\u5ba2\u6237\u7aef\u5728\u4e00\u4e2aRedis\u5b9e\u4f8b\u4e0a\u52a0\u9501\u6210\u529f\uff0c\u4f46\u5728\u8bfb\u53d6\u54cd\u5e94\u7ed3\u679c\u65f6\u7531\u4e8e\u7f51\u7edc\u95ee\u9898\u5bfc\u81f4\u8bfb\u53d6\u5931\u8d25\uff0c\u90a3\u8fd9\u628a\u9501\u5176\u5b9e\u5df2\u7ecf\u5728Redis\u4e0a\u52a0\u9501\u6210\u529f\u4e86\u3002\u6240\u4ee5\u91ca\u653e\u9501\u65f6\uff0c\u4e0d\u7ba1\u4e4b\u524d\u6709\u6ca1\u6709\u52a0\u9501\u6210\u529f\uff0c\u9700\u8981\u91ca\u653e\u6240\u6709\u8282\u70b9\u4e0a\u7684\u9501\u4ee5\u4fdd\u8bc1\u6e05\u7406\u8282\u70b9\u4e0a\u7684\u6b8b\u7559\u7684\u9501<\/code>\u3002<\/p>\n
              \u5728Redlock\u7b97\u6cd5\u4e2d\uff0c\u91ca\u653e\u9501\u7684\u64cd\u4f5c\u548c\u5728\u5355\u5b9e\u4f8b\u4e0a\u91ca\u653e\u9501\u7684\u64cd\u4f5c\u4e00\u6837\uff0c\u53ea\u8981\u6267\u884c\u91ca\u653e\u9501\u7684 Lua\u811a\u672c\u5c31\u53ef\u4ee5\u4e86\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u53ea\u8981N\u4e2aRedis\u5b9e\u4f8b\u4e2d\u7684\u534a\u6570\u4ee5\u4e0a\u5b9e\u4f8b\u80fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u5c31\u80fd\u4fdd\u8bc1\u5206\u5e03\u5f0f\u9501\u7684\u6b63\u5e38\u5de5\u4f5c\u4e86\u3002\u6240\u4ee5\uff0c\u5728\u5b9e\u9645\u7684\u4e1a\u52a1\u5e94\u7528\u4e2d\uff0c\u5982\u679c\u4f60\u60f3\u8981\u63d0\u5347\u5206\u5e03\u5f0f\u9501\u7684\u53ef\u9760\u6027\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7Redlock\u7b97\u6cd5\u6765\u5b9e\u73b0\u3002<\/p>\n
              \u4e8c\u3002\u4ee3\u7801\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501<\/h2>\n
              1.SpringBoot\u6574\u5408redis\u7528\u5230\u6700\u591a\u7684\u5f53\u7136\u5c5e\u4e8e\u6211\u4eec\u7684\u8001\u670b\u53cbRedisTemplate\uff0cpom\u4f9d\u8d56\u5982\u4e0b\uff1a<\/h3>\n
              \n   \n\n   \n    \n     org.springframework.boot\n    \n    \n     spring-boot-starter-data-redis\n    \n   <\/pre>\n
              2.Redis\u914d\u7f6e\u7c7b:<\/h3>\n
              package com.example.redisdemo.config;\n\nimport com.fasterxml.jackson.annotation.JsonAutoDetect;\nimport com.fasterxml.jackson.annotation.PropertyAccessor;\nimport com.fasterxml.jackson.databind.DeserializationFeature;\nimport com.fasterxml.jackson.databind.ObjectMapper;\nimport org.springframework.context.annotation.Bean;\nimport org.springframework.context.annotation.Configuration;\nimport org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;\nimport org.springframework.data.redis.core.RedisTemplate;\nimport org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;\nimport org.springframework.data.redis.serializer.RedisSerializer;\nimport org.springframework.data.redis.serializer.StringRedisSerializer;\n\n\/**\n * @description: Redis\u914d\u7f6e\u7c7b\n * @author Keson\n * @date 21:20 2022\/11\/14\n * @Param\n * @return\n * @version 1.0\n *\/\n@Configuration\npublic class RedisConfig {\n\n    @Bean\n    public RedisTemplate\n   \n     redisTemplate(LettuceConnectionFactory lettuceConnectionFactory) {\n        \/\/ \u8bbe\u7f6e\u5e8f\u5217\u5316\n        Jackson2JsonRedisSerializer\n     jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); jackson2JsonRedisSerializer.setObjectMapper(om); \/\/ \u914d\u7f6eredisTemplate RedisTemplate\n      \n        redisTemplate = new RedisTemplate\n       \n        (); redisTemplate.setConnectionFactory(lettuceConnectionFactory); RedisSerializer> stringSerializer = new StringRedisSerializer(); redisTemplate.setKeySerializer(stringSerializer);\/\/ key\u5e8f\u5217\u5316 redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);\/\/ value\u5e8f\u5217\u5316 redisTemplate.setHashKeySerializer(stringSerializer);\/\/ Hash key\u5e8f\u5217\u5316 redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);\/\/ Hash value\u5e8f\u5217\u5316 redisTemplate.afterPropertiesSet(); return redisTemplate; } } \n       \n      \n   <\/pre>\n
              3.Service\u5c42\u9762<\/h3>\n
              package com.example.redisdemo.service;\n\nimport com.example.redisdemo.entity.CustomerBalance;\nimport java.util.concurrent.Callable;\n\n\/**\n * @author Keson\n * @version 1.0\n * @description: TODO\n * @date 2022\/11\/14 15:12\n *\/\npublic interface RedisService {\n\n    \n   \n     T callWithLock(CustomerBalance customerBalance, Callable\n    \n      callable) throws Exception; } \n    \n   <\/pre>\n
              package com.example.redisdemo.service.impl;\n\nimport com.example.redisdemo.entity.CustomerBalance;\nimport com.example.redisdemo.service.RedisService;\nimport lombok.extern.slf4j.Slf4j;\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.data.redis.connection.RedisStringCommands;\nimport org.springframework.data.redis.connection.ReturnType;\nimport org.springframework.data.redis.core.RedisCallback;\nimport org.springframework.data.redis.core.RedisTemplate;\nimport org.springframework.data.redis.core.types.Expiration;\nimport org.springframework.stereotype.Service;\nimport java.nio.charset.StandardCharsets;\nimport java.util.UUID;\nimport java.util.concurrent.Callable;\nimport java.util.concurrent.TimeUnit;\n\n\/**\n * @author Keson\n * @version 1.0\n * @description: TODO Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\n * @date 2022\/11\/14 15:13\n *\/\n@Service\n@Slf4j\npublic class RedisServiceImpl implements RedisService {\n\n    \/\/\u8bbe\u7f6e\u9ed8\u8ba4\u8fc7\u671f\u65f6\u95f4\n    private final static int DEFAULT_LOCK_EXPIRY_TIME = 20;\n    \/\/\u81ea\u5b9a\u4e49lock key\u524d\u7f00\n    private final static String LOCK_PREFIX = \"LOCK:CUSTOMER_BALANCE\";\n\n    @Autowired\n    private RedisTemplate redisTemplate;\n\n    @Override\n    public \n   \n     T callWithLock(CustomerBalance customerBalance, Callable\n    \n      callable) throws Exception{ \/\/\u81ea\u5b9a\u4e49lock key String lockKey = getLockKey(customerBalance.getCustomerNumber(), customerBalance.getSubAccountNumber(), customerBalance.getCurrencyCode()); \/\/\u5c06UUID\u5f53\u505avalue\uff0c\u786e\u4fdd\u552f\u4e00\u6027 String lockReference = UUID.randomUUID().toString(); try { if (!lock(lockKey, lockReference, DEFAULT_LOCK_EXPIRY_TIME, TimeUnit.SECONDS)) { throw new Exception(\"lock\u52a0\u9501\u5931\u8d25\"); } return callable.call(); } finally { unlock(lockKey, lockReference); } } \/\/\u5b9a\u4e49lock key String getLockKey(String customerNumber, String subAccountNumber, String currencyCode) { return String.format(\"%s:%s:%s:%s\", LOCK_PREFIX, customerNumber, subAccountNumber, currencyCode); } \/\/redis\u52a0\u9501 private boolean lock(String key, String value, long timeout, TimeUnit timeUnit) { Boolean locked; try { \/\/SET_IF_ABSENT --> NX: Only set the key if it does not already exist. \/\/SET_IF_PRESENT --> XX: Only set the key if it already exist. locked = (Boolean) redisTemplate.execute((RedisCallback\n     \n      ) connection -> connection.set(key.getBytes(StandardCharsets.UTF_8), value.getBytes(StandardCharsets.UTF_8), Expiration.from(timeout, timeUnit), RedisStringCommands.SetOption.SET_IF_ABSENT)); } catch (Exception e) { log.error(\"Lock failed for redis key: {}, value: {}\", key, value); locked = false; } return locked != null && locked; } \/\/redis\u89e3\u9501 private boolean unlock(String key, String value) { try { \/\/\u4f7f\u7528lua\u811a\u672c\u4fdd\u8bc1\u5220\u9664\u7684\u539f\u5b50\u6027\uff0c\u786e\u4fdd\u89e3\u9501 String script = \"if redis.call('get', KEYS[1]) == ARGV[1] \" + \"then return redis.call('del', KEYS[1]) \" + \"else return 0 end\"; Boolean unlockState = (Boolean) redisTemplate.execute((RedisCallback\n      \n       ) connection -> connection.eval(script.getBytes(), ReturnType.BOOLEAN, 1, key.getBytes(StandardCharsets.UTF_8), value.getBytes(StandardCharsets.UTF_8))); return unlockState == null || !unlockState; } catch (Exception e) { log.error(\"unLock failed for redis key: {}, value: {}\", key, value); return false; } } } \n      \n     \n    \n   <\/pre>\n
              4.\u4e1a\u52a1\u8c03\u7528\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u793a\u4f8b\uff1a<\/h3>\n
                  @Override\n    public int updateById(CustomerBalance customerBalance) throws Exception {\n        return redisService.callWithLock(customerBalance, ()-> customerBalanceMapper.updateById(customerBalance));\n    }\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
              \u5982\u4f55\u5728SpringBoot\u4e2d\u4f7f\u7528...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201809","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201809"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201809\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}