{"id":202284,"date":"2025-05-10T08:42:58","date_gmt":"2025-05-10T00:42:58","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202284\/"},"modified":"2025-05-10T08:42:58","modified_gmt":"2025-05-10T00:42:58","slug":"redis%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e7%bc%93%e5%ad%98%e4%b8%80%e8%87%b4%e6%80%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202284\/","title":{"rendered":"Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u4e00\u81f4\u6027"},"content":{"rendered":"

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

Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u4e00\u81f4\u6027<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u300aRedis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u4e00\u81f4\u6027\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6570\u636e\u5e93<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6570\u636e\u5e93<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u4e00\u81f4\u6027\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n

\u7f13\u5b58\u662f\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u7684\u91cd\u8981\u624b\u6bb5\u4e4b\u4e00\uff0c\u800c\u5206\u5e03\u5f0f\u7f13\u5b58\u5219\u80fd\u591f\u8fdb\u4e00\u6b65\u63d0\u5347\u7cfb\u7edf\u7684\u5e76\u53d1\u80fd\u529b\u548c\u6269\u5c55\u6027\u3002Redis\u4f5c\u4e3a\u4e00\u79cd\u5e38\u7528\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u5177\u6709\u5feb\u901f\u3001\u9ad8\u6548\u7684\u7279\u70b9\uff0c\u5e7f\u6cdb\u88ab\u7528\u4e8e\u5206\u5e03\u5f0f\u7f13\u5b58\u7684\u5b9e\u73b0\u3002\u5728\u5206\u5e03\u5f0f\u7f13\u5b58\u4e2d\uff0c\u4fdd\u6301\u6570\u636e\u4e00\u81f4\u6027\u662f\u81f3\u5173\u91cd\u8981\u7684\uff0c\u672c\u6587\u5c06\u4ecb\u7ecdRedis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u7684\u4e00\u81f4\u6027\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. Redis\u5206\u5e03\u5f0f\u9501
    \u4e3a\u4e86\u4fdd\u8bc1\u5206\u5e03\u5f0f\u7f13\u5b58\u7684\u4e00\u81f4\u6027\uff0c\u4e00\u4e2a\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528Redis\u7684\u5206\u5e03\u5f0f\u9501\u3002\u901a\u8fc7\u5bf9\u5171\u4eab\u8d44\u6e90\u52a0\u9501\uff0c\u53ef\u4ee5\u907f\u514d\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u8fdb\u884c\u5199\u5165\u6216\u66f4\u65b0\u64cd\u4f5c\u3002\u5728Redis\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528SETNX\u6307\u4ee4\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u529f\u80fd\u3002\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n
    def acquire_lock(redis_conn, lock_key, acquire_timeout, lock_expire):\n    start_time = time.time()\n    while time.time() - start_time < acquire_timeout:\n        if redis_conn.setnx(lock_key, 1):\n            redis_conn.expire(lock_key, lock_expire)\n            return True\n        time.sleep(0.001)\n    return False\n\ndef release_lock(redis_conn, lock_key):\n    redis_conn.delete(lock_key)<\/pre>\n
    \u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0cacquire_lock\u51fd\u6570\u5c1d\u8bd5\u83b7\u53d6\u5206\u5e03\u5f0f\u9501\uff0c\u5982\u679c\u6210\u529f\u83b7\u53d6\u9501\uff0c\u5219\u8fd4\u56deTrue\uff0c\u5426\u5219\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u5185\u91cd\u8bd5\uff1brelease_lock\u51fd\u6570\u91ca\u653e\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n
      \n
    1. Redis\u8ba2\u9605\u4e0e\u53d1\u5e03
      \u9664\u4e86\u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u5916\uff0cRedis\u7684\u8ba2\u9605\u4e0e\u53d1\u5e03\u529f\u80fd\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u7684\u4e00\u81f4\u6027\u3002\u901a\u8fc7\u8ba2\u9605\u76f8\u540c\u7684\u6d88\u606f\u9891\u9053\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u4e0d\u540c\u7684\u7f13\u5b58\u8282\u70b9\u90fd\u80fd\u6536\u5230\u66f4\u65b0\u7684\u901a\u77e5\u3002\u4ee5\u4e0b\u662f\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n
      import redis\n\nclass CacheSubscriber(object):\n    def __init__(self, redis_host, redis_port, channel):\n        self.redis_conn = self._create_redis_conn(redis_host, redis_port)\n        self.pubsub = self.redis_conn.pubsub()\n        self.pubsub.subscribe(channel)\n    \n    def _create_redis_conn(self, redis_host, redis_port):\n        return redis.Redis(host=redis_host, port=redis_port)\n    \n    def process_messages(self):\n        for message in self.pubsub.listen():\n            if message['type'] == 'message':\n                # \u5904\u7406\u7f13\u5b58\u66f4\u65b0\u6d88\u606f\n                self.update_cache(message['data'])\n    \n    def update_cache(self, data):\n        # \u66f4\u65b0\u7f13\u5b58\u903b\u8f91\n        pass\n\nredis_host = 'localhost'\nredis_port = 6379\nchannel = 'cache_update_channel'\nsubscriber = CacheSubscriber(redis_host, redis_port, channel)\nsubscriber.process_messages()<\/pre>\n
      \u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0cCacheSubscriber\u8ba2\u9605\u4e86\u6307\u5b9a\u7684\u6d88\u606f\u9891\u9053\uff0c\u5e76\u901a\u8fc7process_messages\u51fd\u6570\u6765\u5904\u7406\u6536\u5230\u7684\u6d88\u606f\u3002\u5728\u6536\u5230\u7f13\u5b58\u66f4\u65b0\u6d88\u606f\u540e\uff0c\u53ef\u4ee5\u8c03\u7528update_cache\u51fd\u6570\u8fdb\u884c\u76f8\u5e94\u7684\u7f13\u5b58\u66f4\u65b0\u64cd\u4f5c\u3002<\/p>\n
        \n
      1. Redis\u6570\u636e\u7248\u672c\u63a7\u5236
        \u53e6\u4e00\u79cd\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u4e00\u81f4\u6027\u7684\u65b9\u6cd5\u662f\u4f7f\u7528Redis\u7684\u6570\u636e\u7248\u672c\u63a7\u5236\u3002\u6bcf\u4e2a\u7f13\u5b58\u8282\u70b9\u7ef4\u62a4\u4e00\u4e2a\u7248\u672c\u53f7\uff0c\u6bcf\u5f53\u6570\u636e\u66f4\u65b0\u65f6\uff0c\u589e\u52a0\u7248\u672c\u53f7\u3002\u5728\u8bfb\u53d6\u7f13\u5b58\u6570\u636e\u65f6\uff0c\u6bd4\u8f83\u7248\u672c\u53f7\uff0c\u5982\u679c\u7248\u672c\u53f7\u4e0d\u4e00\u81f4\uff0c\u5219\u9700\u8981\u4ece\u6570\u636e\u6e90\u91cd\u65b0\u52a0\u8f7d\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u7248\u672c\u63a7\u5236\u793a\u4f8b\uff1a<\/li>\n<\/ol>\n
        import redis\n\nclass CacheData(object):\n    def __init__(self, redis_host, redis_port, data_key):\n        self.data_key = data_key\n        self.redis_conn = redis.Redis(host=redis_host, port=redis_port)\n    \n    def get_data(self):\n        data = self.redis_conn.get(self.data_key)\n        version = self.redis_conn.get(f'{self.data_key}_version')\n        return data, version\n    \n    def update_data(self, data):\n        self.redis_conn.incr(f'{self.data_key}_version')\n        self.redis_conn.set(self.data_key, data)<\/pre>\n
        \u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0cCacheData\u7c7b\u7ef4\u62a4\u4e86\u7f13\u5b58\u6570\u636e\u548c\u5bf9\u5e94\u7684\u7248\u672c\u53f7\u3002\u5728\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u589e\u52a0\u7248\u672c\u53f7\u7684\u503c\uff0c\u5e76\u66f4\u65b0\u7f13\u5b58\u6570\u636e\u3002\u5728\u8bfb\u53d6\u6570\u636e\u65f6\uff0c\u6bd4\u8f83\u7248\u672c\u53f7\u7684\u503c\uff0c\u5982\u679c\u4e0d\u4e00\u81f4\uff0c\u5219\u91cd\u65b0\u52a0\u8f7d\u6570\u636e\u3002<\/p>\n
        \u603b\u7ed3\uff1a
        Redis\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u7684\u4e00\u81f4\u6027\uff0c\u672c\u6587\u4ecb\u7ecd\u4e86\u5176\u4e2d\u4e09\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\uff1a\u5206\u5e03\u5f0f\u9501\u3001\u8ba2\u9605\u4e0e\u53d1\u5e03\u3001\u6570\u636e\u7248\u672c\u63a7\u5236\u3002\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u786e\u4fdd\u5728\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u7684\u5404\u4e2a\u7f13\u5b58\u8282\u70b9\u7684\u4e00\u81f4\u6027\u3002<\/p>\n
        \n
        \n <\/dt>\n
        \n   Redis\uff1a\u9ad8\u6548\u5904\u7406\u5927\u89c4\u6a21\u5b9e\u65f6\u6570\u636e\u7684\u795e\u5947\u5de5\u5177\n <\/dd>\n<\/dl>\n
        \n
        \n <\/dt>\n
        \n   \u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u7f13\u5b58\u4e00\u81f4...<\/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-202284","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202284","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=202284"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202284\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202284"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202284"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202284"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}