{"id":202260,"date":"2025-05-10T11:58:59","date_gmt":"2025-05-10T03:58:59","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202260\/"},"modified":"2025-05-10T11:58:59","modified_gmt":"2025-05-10T03:58:59","slug":"%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e7%9a%84%e9%ab%98%e5%8f%af%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202260\/","title":{"rendered":"\u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u9ad8\u53ef\u7528"},"content":{"rendered":"

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

\u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u9ad8\u53ef\u7528<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u9ad8\u53ef\u7528\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n

\u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u9ad8\u53ef\u7528\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

\u4e00\u3001\u5f15\u8a00
\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u7531\u4e8e\u591a\u4e2a\u8fdb\u7a0b\u6216\u7ebf\u7a0b\u53ef\u4ee5\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u8d44\u6e90\uff0c\u4f1a\u5e26\u6765\u8d44\u6e90\u7ade\u4e89\u7684\u95ee\u9898\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u5f15\u5165\u5206\u5e03\u5f0f\u9501\u6765\u8fdb\u884c\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\u3002Redis\u4f5c\u4e3a\u4e00\u79cd\u5185\u5b58\u6570\u636e\u5e93\uff0c\u63d0\u4f9b\u4e86\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u5e76\u4e14\u5177\u5907\u9ad8\u53ef\u7528\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u9ad8\u53ef\u7528\uff0c\u5e76\u7ed9\u51fa\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e8c\u3001\u5206\u5e03\u5f0f\u9501\u7684\u57fa\u672c\u539f\u7406
\u5206\u5e03\u5f0f\u9501\u7684\u57fa\u672c\u539f\u7406\u662f\u901a\u8fc7\u5728\u5171\u4eab\u8d44\u6e90\u7684\u8bbf\u95ee\u8fc7\u7a0b\u4e2d\u5f15\u5165\u4e92\u65a5\u673a\u5236\uff0c\u4fdd\u8bc1\u540c\u4e00\u65f6\u95f4\u53ea\u6709\u4e00\u4e2a\u8fdb\u7a0b\u6216\u7ebf\u7a0b\u53ef\u4ee5\u8bbf\u95ee\u8d44\u6e90\u3002Redis\u63d0\u4f9b\u4e86\u4e24\u79cd\u7ecf\u5178\u7684\u5b9e\u73b0\u65b9\u5f0f\uff1a\u57fa\u4e8e\u5355\u5b9e\u4f8b\u7684\u5b9e\u73b0\u548c\u57fa\u4e8eRedis\u96c6\u7fa4\u7684\u5b9e\u73b0\u3002\u672c\u6587\u4e3b\u8981\u4ecb\u7ecd\u57fa\u4e8eRedis\u96c6\u7fa4\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n

\u4e09\u3001\u57fa\u4e8eRedis\u96c6\u7fa4\u7684\u5206\u5e03\u5f0f\u9501\u5b9e\u73b0<\/p>\n

    \n
  1. \u83b7\u53d6\u9501\u7684\u8fc7\u7a0b
    \u5728Redis\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7setnx\uff08set if not exists\uff09\u547d\u4ee4\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u83b7\u53d6\u8fc7\u7a0b\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a
    \uff081\uff09\u901a\u8fc7setnx\u547d\u4ee4\u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u82e5\u8fd4\u56de1\u5219\u4ee3\u8868\u6210\u529f\u83b7\u53d6\u9501\uff1b
    \uff082\uff09\u82e5\u8fd4\u56de0\u5219\u4ee3\u8868\u9501\u5df2\u7ecf\u88ab\u5176\u4ed6\u8fdb\u7a0b\u6216\u7ebf\u7a0b\u6301\u6709\uff0c\u9700\u8981\u8fdb\u5165\u7b49\u5f85\u6216\u91cd\u8bd5\u72b6\u6001\u3002<\/li>\n
  2. \u91ca\u653e\u9501\u7684\u8fc7\u7a0b
    \u91ca\u653e\u9501\u7684\u8fc7\u7a0b\u4e3b\u8981\u901a\u8fc7del\u547d\u4ee4\u6765\u5b9e\u73b0\uff0c\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a
    \uff081\uff09\u901a\u8fc7del\u547d\u4ee4\u5220\u9664\u9501\u3002<\/li>\n
  3. \u9ad8\u53ef\u7528\u6027\u7684\u4fdd\u969c
    \u5728\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u65f6\uff0c\u9700\u8981\u8003\u8651\u9501\u7684\u91cd\u5165\u6027\u3001\u6b7b\u9501\u68c0\u6d4b\u7b49\u95ee\u9898\uff0c\u4ee5\u4fdd\u8bc1\u9ad8\u53ef\u7528\u6027\u3002\u53ef\u4ee5\u901a\u8fc7\u7ed9\u9501\u8bbe\u7f6e\u4e00\u4e2a\u8fc7\u671f\u65f6\u95f4\u6765\u907f\u514d\u6b7b\u9501\u95ee\u9898\u3002\u540c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528Lua\u811a\u672c\u6765\u5b9e\u73b0\u4ee5\u4e0a\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u907f\u514d\u4e0d\u53ef\u91cd\u5165\u6027\u95ee\u9898\u3002<\/li>\n<\/ol>\n

    \u56db\u3001\u4ee3\u7801\u793a\u4f8b
    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528Java\u8bed\u8a00\u5b9e\u73b0\u57fa\u4e8eRedis\u96c6\u7fa4\u7684\u5206\u5e03\u5f0f\u9501\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

    public class DistributedLock {\n    private static final String LOCK_KEY = \"redis_lock\";\n    private static final int EXPIRE_TIME = 5000; \/\/ \u9501\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u5355\u4f4d\u6beb\u79d2\n    private static final int TIMEOUT = 10000; \/\/ \u83b7\u53d6\u9501\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u5355\u4f4d\u6beb\u79d2\n    \n    private JedisCluster jedisCluster;\n    private String lockValue; \/\/ \u9501\u7684\u552f\u4e00\u6807\u8bc6\uff0c\u7528\u4e8e\u540e\u7eed\u91ca\u653e\u9501\n\n    public DistributedLock(JedisCluster jedisCluster) {\n        this.jedisCluster = jedisCluster;\n    }\n\n    public boolean lock() {\n        long start = System.currentTimeMillis();\n        try {\n            \/\/ \u5faa\u73af\u83b7\u53d6\u9501\uff0c\u76f4\u5230\u8d85\u65f6\n            while (System.currentTimeMillis() - start < TIMEOUT) {\n                lockValue = UUID.randomUUID().toString();\n                String result = jedisCluster.set(LOCK_KEY, lockValue, \"NX\", \"PX\", EXPIRE_TIME);\n                if (\"OK\".equals(result)) {\n                    return true;\n                }\n                Thread.sleep(100); \/\/ \u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\u540e\u91cd\u8bd5\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n        return false;\n    }\n\n    public void unlock() {\n        try {\n            String value = jedisCluster.get(LOCK_KEY);\n            if (lockValue.equals(value)) {\n                jedisCluster.del(LOCK_KEY);\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n
    \u5728\u4f7f\u7528\u4e0a\u8ff0\u4ee3\u7801\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528lock()\u65b9\u6cd5\u83b7\u53d6\u9501\uff0c\u5e76\u5728\u83b7\u53d6\u9501\u540e\u6267\u884c\u9700\u8981\u4e92\u65a5\u8bbf\u95ee\u7684\u4ee3\u7801\u5757\uff0c\u6700\u540e\u901a\u8fc7\u8c03\u7528unlock()\u65b9\u6cd5\u91ca\u653e\u9501\u3002<\/p>\n
    \u4e94\u3001\u603b\u7ed3
    \u901a\u8fc7\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u51b3\u8d44\u6e90\u7ade\u4e89\u7684\u95ee\u9898\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u57fa\u4e8eRedis\u96c6\u7fa4\u7684\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u539f\u7406\uff0c\u5e76\u7ed9\u51fa\u4e86\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u5728\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u65f6\uff0c\u8fd8\u9700\u8003\u8651\u5230\u91cd\u5165\u6027\u3001\u6b7b\u9501\u68c0\u6d4b\u7b49\u95ee\u9898\uff0c\u4ee5\u4fdd\u8bc1\u9ad8\u53ef\u7528\u6027\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u8bfb\u8005\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
    \n
    \n <\/dt>\n
    \n   \u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4fdd\u969c\u6570\u636e\u5b89\u5168\n <\/dd>\n<\/dl>\n
    \n
    \n <\/dt>\n
    \n   PHP\u5f00\u53d1\u4e2d\u5982\u4f55\u4f7f\u7528Memcache\u8fdb\u884c\u9ad8\u6548\u7684\u6570\u636e\u8bfb\u5199\u64cd\u4f5c\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684...<\/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-202260","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202260","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=202260"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202260\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}