{"id":201396,"date":"2025-05-10T10:38:21","date_gmt":"2025-05-10T02:38:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201396\/"},"modified":"2025-05-10T10:38:21","modified_gmt":"2025-05-10T02:38:21","slug":"%e8%a7%a3%e9%94%81redis%e9%94%81%e7%9a%84%e6%ad%a3%e7%a1%ae%e5%a7%bf%e5%8a%bf","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201396\/","title":{"rendered":"\u89e3\u9501redis\u9501\u7684\u6b63\u786e\u59ff\u52bf"},"content":{"rendered":"

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

\u89e3\u9501redis\u9501\u7684\u6b63\u786e\u59ff\u52bf<\/h1>\n

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

\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u89e3\u9501redis\u9501\u7684\u6b63\u786e\u59ff\u52bf\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n

\u89e3\u9501redis\u9501\u7684\u6b63\u786e\u59ff\u52bf<\/strong><\/p>\n

redis\u662fphp\u7684\u597d\u670b\u53cb\uff0c\u5728php\u5199\u4e1a\u52a1\u8fc7\u7a0b\u4e2d\uff0c\u6709\u65f6\u5019\u4f1a\u4f7f\u7528\u5230\u9501\u7684\u6982\u5ff5\uff0c\u540c\u65f6\u53ea\u80fd\u6709\u4e00\u4e2a\u4eba\u53ef\u4ee5\u64cd\u4f5c\u67d0\u4e2a\u884c\u4e3a\u3002\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u5c31\u8981\u7528\u5230\u9501\u3002\u9501\u7684\u65b9\u5f0f\u6709\u597d\u51e0\u79cd\uff0cphp\u4e0d\u80fd\u5728\u5185\u5b58\u4e2d\u7528\u9501\uff0c\u4e0d\u80fd\u4f7f\u7528zookeeper\u52a0\u9501\uff0c\u4f7f\u7528\u6570\u636e\u5e93\u505a\u9501\u53c8\u6d88\u8017\u6bd4\u8f83\u5927\uff0c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u4e00\u822c\u4f1a\u9009\u7528redis\u505a\u9501\u673a\u5236\u3002<\/p>\n

setnx<\/strong><\/p>\n

\u9501\u5728redis\u4e2d\u6700\u7b80\u5355\u7684\u6570\u636e\u7ed3\u6784\u5c31\u662fstring\u3002\u6700\u65e9\u7684\u65f6\u5019\uff0c\u4e0a\u9501\u7684\u64cd\u4f5c\u4e00\u822c\u4f7f\u7528setnx\uff0c\u8fd9\u4e2a\u547d\u4ee4\u662f\u5f53:lock\u4e0d\u5b58\u5728\u7684\u65f6\u5019set\u4e00\u4e2aval\uff0c\u6216\u8bb8\u4f60\u8fd8\u4f1a\u8bb0\u5f97\u4f7f\u7528expire\u6765\u589e\u52a0\u9501\u7684\u8fc7\u671f\uff0c\u89e3\u9501\u64cd\u4f5c\u5c31\u662f\u4f7f\u7528del\u547d\u4ee4\uff0c\u4f2a\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

\nif (Redis::setnx(\"my:lock\", 1)) {\n  Redis::expire(\"my:lock\", 10);\n  \/\/ ... do something\n\n  Redis::del(\"my:lock\")\n}\n\n<\/pre>\n
\u8fd9\u91cc\u5176\u5b9e\u662f\u6709\u95ee\u9898\u7684\uff0c\u95ee\u9898\u5c31\u5728\u4e8esetnx\u548cexpire\u4e2d\u95f4\u5982\u679c\u9047\u5230crash\u7b49\u884c\u4e3a\uff0c\u53ef\u80fd\u8fd9\u4e2alock\u5c31\u4e0d\u4f1a\u88ab\u91ca\u653e\u4e86\u3002\u4e8e\u662f\u8fdb\u4e00\u6b65\u7684\u4f18\u5316\u65b9\u6848\u53ef\u80fd\u662f\u5728lock\u4e2d\u5b58\u50a8timestamp\u3002\u5224\u65adtimestamp\u7684\u957f\u77ed\u3002<\/p>\n
set
<\/strong><\/p>\n
\u73b0\u5728\u5b98\u65b9\u5efa\u8bae\u76f4\u63a5\u4f7f\u7528set\u6765\u5b9e\u73b0\u9501\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528set\u547d\u4ee4\u6765\u66ff\u4ee3setnx\uff0c\u5c31\u662f\u4e0b\u9762\u8fd9\u4e2a\u6837\u5b50<\/p>\n
\nif (Redis::set(\"my:lock\", 1, \"nx\", \"ex\", 10)) {\n  ... do something\n\n  Redis::del(\"my:lock\")\n}\n\n<\/pre>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u628amy:lock\u8bbe\u7f6e\u4e3a1\uff0c\u5f53\u4e14\u4ec5\u5f53\u8fd9\u4e2alock\u4e0d\u5b58\u5728\u7684\u65f6\u5019\uff0c\u8bbe\u7f6e\u5b8c\u6210\u4e4b\u540e\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u4e3a10\u3002<\/p>\n
\u83b7\u53d6\u9501\u7684\u673a\u5236\u662f\u5bf9\u4e86\uff0c\u4f46\u662f\u5220\u9664\u9501\u7684\u673a\u5236\u76f4\u63a5\u4f7f\u7528del\u662f\u4e0d\u5bf9\u7684\u3002\u56e0\u4e3a\u6709\u53ef\u80fd\u5bfc\u81f4\u8bef\u5220\u522b\u4eba\u7684\u9501\u7684\u60c5\u51b5\u3002<\/p>\n
\u6bd4\u5982\uff0c\u8fd9\u4e2a\u9501\u6211\u4e0a\u4e8610s\uff0c\u4f46\u662f\u6211\u5904\u7406\u7684\u65f6\u95f4\u6bd410s\u66f4\u957f\uff0c\u5230\u4e8610s\uff0c\u8fd9\u4e2a\u9501\u81ea\u52a8\u8fc7\u671f\u4e86\uff0c\u88ab\u522b\u4eba\u53d6\u8d70\u4e86\uff0c\u5e76\u4e14\u5bf9\u5b83\u91cd\u65b0\u4e0a\u9501\u4e86\u3002\u90a3\u4e48\u8fd9\u4e2a\u65f6\u5019\uff0c\u6211\u518d\u8c03\u7528Redis::del\u5c31\u662f\u5220\u9664\u522b\u4eba\u5efa\u7acb\u7684\u9501\u4e86\u3002<\/p>\n
\u5b98\u65b9\u5bf9\u89e3\u9501\u7684\u547d\u4ee4\u4e5f\u6709\u5efa\u8bae\uff0c\u5efa\u8bae\u4f7f\u7528lua\u811a\u672c\uff0c\u5148\u8fdb\u884cget\uff0c\u518d\u8fdb\u884cdel<\/p>\n
\u7a0b\u5e8f\u53d8\u6210\uff1a<\/p>\n
\n$token = rand(1, 100000);\n\nfunction lock() {\n  return Redis::set(\"my:lock\", $token, \"nx\", \"ex\", 10);\n}\n\nfunction unlock() {\n  $script = `\nif redis.call(\"get\",KEYS[1]) == ARGV[1]\nthen\n  return redis.call(\"del\",KEYS[1])\nelse\n  return 0\nend  \n  `\n  return Redis::eval($script, \"my:lock\", $token)\n}\n\nif (lock()) {\n  \/\/ do something\n\n  unlock();\n}\n\n<\/pre>\n
\u8fd9\u91cc\u7684token\u662f\u4e00\u4e2a\u968f\u673a\u6570\uff0c\u5f53lock\u7684\u65f6\u5019\uff0c\u5f80redis\u7684my:lock\u4e2d\u5b58\u7684\u662f\u8fd9\u4e2atoken\uff0cunlock\u7684\u65f6\u5019\uff0c\u5148get\u4e00\u4e0block\u4e2d\u7684token\uff0c\u5982\u679c\u548c\u6211\u8981\u5220\u9664\u7684token\u662f\u4e00\u81f4\u7684\uff0c\u8bf4\u660e\u8fd9\u4e2a\u9501\u662f\u4e4b\u524d\u6211set\u7684\uff0c\u5426\u5219\u7684\u8bdd\uff0c\u8bf4\u660e\u8fd9\u4e2a\u9501\u5df2\u7ecf\u8fc7\u671f\uff0c\u662f\u522b\u4ebaset\u7684\uff0c\u6211\u5c31\u4e0d\u5e94\u8be5\u5bf9\u5b83\u8fdb\u884c\u4efb\u4f55\u64cd\u4f5c\u3002<\/p>\n
\u6240\u4ee5\uff1a\u4e0d\u8981\u518d\u4f7f\u7528setnx\uff0c\u76f4\u63a5\u4f7f\u7528set\u8fdb\u884c\u9501\u5b9e\u73b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u89e3\u9501redis\u9501\u7684\u6b63\u786e\u59ff\u52bf \u6536\u85cf...<\/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-201396","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201396","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=201396"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201396\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}