{"id":163989,"date":"2024-11-05T04:06:27","date_gmt":"2024-11-04T20:06:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/163989\/"},"modified":"2024-11-05T04:06:27","modified_gmt":"2024-11-04T20:06:27","slug":"%e8%a7%a3%e9%8e%96%e8%87%aa%e5%8b%95%e5%bb%b6%e6%99%82redis%e9%8e%96%e7%9a%84%e4%b8%80%e7%a8%ae%e5%af%a6%e7%8f%be%e6%96%b9%e5%bc%8f%ef%bc%88redis%e9%8e%96%e8%87%aa%e5%8b%95%e5%bb%b6%e6%99%82%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/163989\/","title":{"rendered":"\u89e3\u9396\u81ea\u52d5\u5ef6\u6642Redis\u9396\u7684\u4e00\u7a2e\u5be6\u73fe\u65b9\u5f0f\uff08redis\u9396\u81ea\u52d5\u5ef6\u6642\uff09"},"content":{"rendered":"

\u89e3\u9396\u81ea\u52d5\u5ef6\u6642Redis\u9396\u7684\u4e00\u7a2e\u5be6\u73fe\u65b9\u5f0f\uff08redis\u9396\u81ea\u52d5\u5ef6\u6642\uff09<\/h1>\n

\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u7ba1\u7406\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u9632\u6b62\u7af6\u722d\u689d\u4ef6\u7684\u91cd\u8981\u624b\u6bb5\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\uff0c\u5176\u4e2d\u81ea\u52d5\u5ef6\u6642\u9396\u662f\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5be6\u73feRedis\u9396\u7684\u81ea\u52d5\u5ef6\u6642\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662fRedis\u9396\uff1f<\/h2>\n

Redis\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u8a2a\u554f\u7684\u6a5f\u5236\u3002\u5b83\u53ef\u4ee5\u9632\u6b62\u591a\u500b\u9032\u7a0b\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002Redis\u9396\u7684\u57fa\u672c\u539f\u7406\u662f\u4f7f\u7528SETNX\u547d\u4ee4\u4f86\u8a2d\u7f6e\u4e00\u500b\u9375\uff0c\u7576\u9375\u4e0d\u5b58\u5728\u6642\uff0c\u8a2d\u7f6e\u6210\u529f\uff0c\u5426\u5247\u8868\u793a\u9396\u5df2\u88ab\u4f54\u7528\u3002<\/p>\n

\u81ea\u52d5\u5ef6\u6642\u9396\u7684\u5fc5\u8981\u6027<\/h2>\n

\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u9396\u7684\u6301\u6709\u8005\u53ef\u80fd\u6703\u56e0\u70ba\u67d0\u4e9b\u539f\u56e0\uff08\u5982\u9577\u6642\u9593\u7684\u8a08\u7b97\u6216\u7db2\u7d61\u5ef6\u9072\uff09\u800c\u7121\u6cd5\u53ca\u6642\u91cb\u653e\u9396\u3002\u9019\u6642\uff0c\u5982\u679c\u9396\u7684\u904e\u671f\u6642\u9593\u8a2d\u7f6e\u5f97\u904e\u77ed\uff0c\u5176\u4ed6\u8acb\u6c42\u5c07\u7121\u6cd5\u7372\u5f97\u9396\uff0c\u5f9e\u800c\u5c0e\u81f4\u7cfb\u7d71\u6027\u80fd\u4e0b\u964d\u3002\u81ea\u52d5\u5ef6\u6642\u9396\u7684\u5be6\u73fe\u53ef\u4ee5\u5728\u9396\u6301\u6709\u8005\u4ecd\u5728\u57f7\u884c\u4efb\u52d9\u6642\uff0c\u81ea\u52d5\u5ef6\u9577\u9396\u7684\u6709\u6548\u671f\uff0c\u5f9e\u800c\u907f\u514d\u9396\u7684\u610f\u5916\u91cb\u653e\u3002<\/p>\n

\u81ea\u52d5\u5ef6\u6642\u9396\u7684\u5be6\u73fe\u65b9\u5f0f<\/h2>\n

\u4ee5\u4e0b\u662f\u4e00\u7a2e\u57fa\u65bcRedis\u7684\u81ea\u52d5\u5ef6\u6642\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\uff1a<\/p>\n

import redis\nimport time\nimport threading\n\nclass RedisLock:\n    def __init__(self, redis_client, lock_name, expire=10):\n        self.redis_client = redis_client\n        self.lock_name = lock_name\n        self.expire = expire\n        self.locked = False\n\n    def acquire(self):\n        while not self.locked:\n            if self.redis_client.set(self.lock_name, \"locked\", nx=True, ex=self.expire):\n                self.locked = True\n                self._extend_lock()\n                return True\n            time.sleep(0.1)\n        return False\n\n    def release(self):\n        if self.locked:\n            self.redis_client.delete(self.lock_name)\n            self.locked = False\n\n    def _extend_lock(self):\n        def extend():\n            while self.locked:\n                time.sleep(self.expire \/ 2)\n                self.redis_client.expire(self.lock_name, self.expire)\n        threading.Thread(target=extend).start()\n\n# \u4f7f\u7528\u793a\u4f8b\nredis_client = redis.StrictRedis(host='localhost', port=6379, db=0)\nlock = RedisLock(redis_client, \"my_lock\", expire=10)\n\nif lock.acquire():\n    try:\n        # \u57f7\u884c\u9700\u8981\u9396\u5b9a\u7684\u64cd\u4f5c\n        time.sleep(15)  # \u6a21\u64ec\u9577\u6642\u9593\u64cd\u4f5c\n    finally:\n        lock.release()\n<\/code><\/pre>\n
\u4ee3\u78bc\u89e3\u6790<\/h2>\n
\u5728\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70baRedisLock<\/code>\u7684\u985e\uff0c\u8a72\u985e\u5305\u542b\u4e86\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u908f\u8f2f\u3002acquire<\/code>\u65b9\u6cd5\u5617\u8a66\u7372\u53d6\u9396\uff0c\u5982\u679c\u6210\u529f\u5247\u555f\u52d5\u4e00\u500b\u65b0\u7dda\u7a0b\u4f86\u5b9a\u671f\u5ef6\u9577\u9396\u7684\u6709\u6548\u671f\u3002release<\/code>\u65b9\u6cd5\u5247\u7528\u65bc\u91cb\u653e\u9396\u3002<\/p>\n
\u5728\u4f7f\u7528\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500bRedis\u5ba2\u6236\u7aef\uff0c\u7136\u5f8c\u5be6\u4f8b\u5316RedisLock<\/code>\u985e\u4e26\u5617\u8a66\u7372\u53d6\u9396\u3002\u5728\u7372\u53d6\u9396\u5f8c\uff0c\u6211\u5011\u57f7\u884c\u4e86\u4e00\u500b\u6a21\u64ec\u7684\u9577\u6642\u9593\u64cd\u4f5c\uff0c\u6700\u5f8c\u91cb\u653e\u9396\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u81ea\u52d5\u5ef6\u6642Redis\u9396\u662f\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u53ef\u4ee5\u9632\u6b62\u56e0\u70ba\u9396\u7684\u904e\u671f\u800c\u5c0e\u81f4\u7684\u8cc7\u6e90\u7af6\u722d\u554f\u984c\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\uff0c\u6211\u5011\u53ef\u4ee5\u78ba\u4fdd\u5728\u9577\u6642\u9593\u64cd\u4f5c\u4e2d\u9396\u7684\u6709\u6548\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u6027\u80fd\u7684\u61c9\u7528\u5834\u666f\uff0c\u9078\u64c7\u5408\u9069\u7684\u9396\u6a5f\u5236\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 \u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u89e3\u9396\u81ea\u52d5\u5ef6\u6642Redis\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\uff0c\u63d0\u5347\u9396\u7684\u9748\u6d3b\u6027\u8207\u6548\u7387\uff0c\u78ba\u4fdd\u8cc7\u6e90\u7684\u5b89\u5168\u7ba1\u7406\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-163989","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163989","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=163989"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163989\/revisions"}],"predecessor-version":[{"id":163990,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/163989\/revisions\/163990"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=163989"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=163989"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=163989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}