{"id":202246,"date":"2025-05-10T11:25:48","date_gmt":"2025-05-10T03:25:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202246\/"},"modified":"2025-05-10T11:25:48","modified_gmt":"2025-05-10T03:25:48","slug":"redis%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202246\/","title":{"rendered":"Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd"},"content":{"rendered":"

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

Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd<\/h1>\n

\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u300aRedis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6570\u636e\u5e93<\/span>\uff0c\u6216\u8005\u662f\u5bf9\u6570\u636e\u5e93<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n

Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd<\/p>\n

\u5206\u5e03\u5f0f\u9501\u662f\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u5e38\u7528\u7684\u4e00\u79cd\u540c\u6b65\u673a\u5236\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5728\u591a\u4e2a\u8fdb\u7a0b\u6216\u591a\u53f0\u670d\u52a1\u5668\u4e4b\u95f4\u5b9e\u73b0\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\u3002Redis\u4f5c\u4e3a\u4e00\u79cd\u9ad8\u6027\u80fd\u7684\u7f13\u5b58\u548c\u6d88\u606f\u961f\u5217\u4e2d\u95f4\u4ef6\uff0c\u4e5f\u63d0\u4f9b\u4e86\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u529f\u80fd\u3002\u672c\u6587\u5c06\u4ecb\u7ecdRedis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u57fa\u4e8eSETNX\u547d\u4ee4\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501<\/li>\n<\/ol>\n

    Redis\u63d0\u4f9b\u4e86SETNX\u547d\u4ee4\uff0c\u8be5\u547d\u4ee4\u53ef\u4ee5\u5728\u952e\u4e0d\u5b58\u5728\u65f6\u8bbe\u7f6e\u952e\u7684\u503c\uff0c\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u547d\u4ee4\u6267\u884c\u5931\u8d25\u3002\u6211\u4eec\u53ef\u4ee5\u5229\u7528SETNX\u547d\u4ee4\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u529f\u80fd\u3002<\/p>\n

    \u4e0b\u9762\u662f\u4e00\u4e2a\u57fa\u4e8eSETNX\u547d\u4ee4\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n

    import redis\n\nclass RedisLock:\n    def __init__(self, key, value, expire_time):\n        self.redis = redis.Redis(host='localhost', port=6379, db=0)\n        self.key = key\n        self.value = value\n        self.expire_time = expire_time\n\n    def acquire(self):\n        while True:\n            result = self.redis.setnx(self.key, self.value)\n            if result:\n                self.redis.expire(self.key, self.expire_time)\n                return True\n\n    def release(self):\n        self.redis.delete(self.key)<\/pre>\n
    \u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2aRedisLock\u7c7b\uff0c\u5b83\u6709\u4e24\u4e2a\u65b9\u6cd5\uff1aacquire\u548crelease\u3002acquire\u65b9\u6cd5\u5c1d\u8bd5\u83b7\u53d6\u5206\u5e03\u5f0f\u9501\uff0c\u5982\u679c\u83b7\u53d6\u6210\u529f\uff0c\u5219\u8fd4\u56deTrue\uff1brelease\u65b9\u6cd5\u91ca\u653e\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n
    \u5728\u4f7f\u7528\u65f6\u53ef\u4ee5\u8fd9\u6837\u8c03\u7528\uff1a<\/p>\n
    lock = RedisLock('my_lock', '1', 10)\nif lock.acquire():\n    try:\n        # \u6267\u884c\u9700\u8981\u52a0\u9501\u7684\u4e1a\u52a1\u903b\u8f91\n        ...\n    finally:\n        lock.release()<\/pre>\n
      \n
    1. \u57fa\u4e8eSET\u547d\u4ee4\u548cLua\u811a\u672c\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501<\/li>\n<\/ol>\n
      \u4e0a\u8ff0\u57fa\u4e8eSETNX\u547d\u4ee4\u7684\u5b9e\u73b0\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u80fd\u5b58\u5728\u95ee\u9898\uff0c\u6bd4\u5982\u5f53\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u65f6\u95f4\u5f88\u957f\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4\u9501\u7684\u5931\u6548\u95ee\u9898\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Lua\u811a\u672c\u7ed3\u5408SET\u547d\u4ee4\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n
      \u4e0b\u9762\u662f\u4e00\u4e2a\u57fa\u4e8eSET\u547d\u4ee4\u548cLua\u811a\u672c\u5b9e\u73b0\u7684\u5206\u5e03\u5f0f\u9501\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
      import redis\n\nclass RedisLock:\n    def __init__(self, key, value, expire_time):\n        self.redis = redis.Redis(host='localhost', port=6379, db=0)\n        self.key = key\n        self.value = value\n        self.expire_time = expire_time\n\n    def acquire(self):\n        script = '''\n            if redis.call(\"exists\", KEYS[1]) == 0 then\n                redis.call(\"set\", KEYS[1], ARGV[1])\n                redis.call(\"expire\", KEYS[1], tonumber(ARGV[2]))\n                return 1\n            else\n                return 0\n            end\n        '''\n        result = self.redis.eval(script, 1, self.key, self.value, self.expire_time)\n        return result == 1\n\n    def release(self):\n        self.redis.delete(self.key)<\/pre>\n
      \u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86eval\u65b9\u6cd5\u8c03\u7528Lua\u811a\u672c\uff0c\u811a\u672c\u901a\u8fc7\u5224\u65ad\u952e\u662f\u5426\u5b58\u5728\u6765\u51b3\u5b9a\u662f\u5426\u8bbe\u7f6e\u952e\u7684\u503c\u548c\u8fc7\u671f\u65f6\u95f4\u3002\u8fd9\u6837\u5373\u4f7f\u4e1a\u52a1\u903b\u8f91\u6267\u884c\u65f6\u95f4\u5f88\u957f\uff0c\u4e5f\u4e0d\u4f1a\u51fa\u73b0\u9501\u7684\u5931\u6548\u95ee\u9898\u3002<\/p>\n
      \u4f7f\u7528\u65b9\u6cd5\u548c\u4e0a\u8ff0\u57fa\u4e8eSETNX\u547d\u4ee4\u7684\u5b9e\u73b0\u76f8\u540c\u3002<\/p>\n
      \u603b\u7ed3\uff1a<\/p>\n
      \u672c\u6587\u4ecb\u7ecd\u4e86Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd\uff0c\u5e76\u63d0\u4f9b\u4e86\u57fa\u4e8eSETNX\u547d\u4ee4\u548c\u57fa\u4e8eSET\u547d\u4ee4\u548cLua\u811a\u672c\u4e24\u79cd\u5b9e\u73b0\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u6c42\u9009\u62e9\u9002\u5408\u7684\u5b9e\u73b0\u65b9\u5f0f\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u4ee5\u4fdd\u8bc1\u5bf9\u5171\u4eab\u8d44\u6e90\u7684\u4e92\u65a5\u8bbf\u95ee\u3002<\/p>\n
      \n
      \n <\/dt>\n
      \n   PHP\u5f00\u53d1\u4e2d\u5982\u4f55\u4f7f\u7528Memcache\u5b9e\u73b0\u9ad8\u6548\u7684\u6570\u636e\u7f13\u5b58\u548c\u8ba1\u7b97\u64cd\u4f5c\uff1f\n <\/dd>\n<\/dl>\n
      \n
      \n <\/dt>\n
      \n   \u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u4efb\u52a1\u8c03\u5ea6\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u529f\u80fd ...<\/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-202246","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202246","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=202246"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202246\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202246"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202246"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202246"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}