{"id":161663,"date":"2024-11-04T08:18:24","date_gmt":"2024-11-04T00:18:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161663\/"},"modified":"2024-11-04T08:18:25","modified_gmt":"2024-11-04T00:18:25","slug":"%e5%9f%ba%e6%96%bc-redis-%e8%a7%a3%e6%b1%ba%e9%8e%96%e8%b6%85%e6%99%82%e5%95%8f%e9%a1%8c%ef%bc%88redis-%e8%a7%a3%e6%b1%ba%e9%8e%96%e8%b6%85%e6%99%82%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161663\/","title":{"rendered":"\u57fa\u65bc Redis \u89e3\u6c7a\u9396\u8d85\u6642\u554f\u984c\uff08redis \u89e3\u6c7a\u9396\u8d85\u6642\uff09"},"content":{"rendered":"

\u57fa\u65bc Redis \u89e3\u6c7a\u9396\u8d85\u6642\u554f\u984c<\/h1>\n

\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u662f\u70ba\u4e86\u9632\u6b62\u591a\u500b\u9032\u7a0b\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u7136\u800c\uff0c\u9396\u7684\u8d85\u6642\u554f\u984c\u537b\u662f\u958b\u767c\u8005\u5728\u4f7f\u7528 Redis \u4f5c\u70ba\u9396\u6a5f\u5236\u6642\u5e38\u5e38\u9762\u81e8\u7684\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u57fa\u65bc Redis \u89e3\u6c7a\u9396\u8d85\u6642\u554f\u984c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u89e3\u6c7a\u65b9\u6848\u548c\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u9396\u8d85\u6642\u554f\u984c\uff1f<\/h2>\n

\u9396\u8d85\u6642\u554f\u984c\u662f\u6307\u7576\u4e00\u500b\u9032\u7a0b\u7372\u5f97\u9396\u5f8c\uff0c\u7531\u65bc\u67d0\u4e9b\u539f\u56e0\uff08\u5982\u7a0b\u5e8f\u7570\u5e38\u3001\u7db2\u7d61\u554f\u984c\u7b49\uff09\uff0c\u672a\u80fd\u5728\u9810\u5b9a\u6642\u9593\u5167\u91cb\u653e\u9396\uff0c\u5c0e\u81f4\u5176\u4ed6\u9032\u7a0b\u7121\u6cd5\u7372\u5f97\u9396\uff0c\u5f9e\u800c\u9020\u6210\u7cfb\u7d71\u7684\u6b7b\u9396\u6216\u6027\u80fd\u4e0b\u964d\u3002\u9019\u5728\u9ad8\u4f75\u767c\u7684\u74b0\u5883\u4e2d\u5c24\u70ba\u660e\u986f\uff0c\u56e0\u70ba\u9396\u7684\u6301\u6709\u6642\u9593\u904e\u9577\u6703\u5f71\u97ff\u6574\u9ad4\u7cfb\u7d71\u7684\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n

Redis \u9396\u7684\u57fa\u672c\u539f\u7406<\/h2>\n

Redis \u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u9396\u6a5f\u5236\uff0c\u901a\u5e38\u662f\u901a\u904e SETNX \u547d\u4ee4\u4f86\u5be6\u73fe\u3002SETNX \u547d\u4ee4\u7684\u5168\u540d\u662f “SET if Not eXists”\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u7576\u9375\u4e0d\u5b58\u5728\u6642\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u4e26\u8fd4\u56de 1\uff1b\u5982\u679c\u9375\u5df2\u5b58\u5728\uff0c\u5247\u8fd4\u56de 0\u3002\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u3002<\/p>\n

SETNX lock_key unique_lock_value\n<\/code><\/pre>\n
\u5728\u7372\u5f97\u9396\u5f8c\uff0c\u901a\u5e38\u6703\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\uff0c\u4ee5\u9632\u6b62\u9396\u7684\u6c38\u4e45\u6301\u6709\u3002\u9019\u6a23\uff0c\u5373\u4f7f\u9032\u7a0b\u5d29\u6f70\uff0c\u9396\u4e5f\u6703\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u81ea\u52d5\u91cb\u653e\u3002<\/p>\n
\u89e3\u6c7a\u9396\u8d85\u6642\u7684\u7b56\u7565<\/h2>\n
\u70ba\u4e86\u89e3\u6c7a\u9396\u8d85\u6642\u554f\u984c\uff0c\u6211\u5011\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u7b56\u7565\uff1a<\/p>\n
1. \u4f7f\u7528 Lua \u8173\u672c\u539f\u5b50\u6027\u91cb\u653e\u9396<\/h3>\n
\u4f7f\u7528 Lua \u8173\u672c\u53ef\u4ee5\u78ba\u4fdd\u9396\u7684\u91cb\u653e\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684\u3002\u9019\u610f\u5473\u8457\u5728\u91cb\u653e\u9396\u7684\u904e\u7a0b\u4e2d\uff0c\u4e0d\u6703\u6709\u5176\u4ed6\u9032\u7a0b\u5e72\u64fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
\nlocal lock_value = redis.call(\"GET\", KEYS[1])\nif lock_value == ARGV[1] then\n    return redis.call(\"DEL\", KEYS[1])\nelse\n    return 0\nend\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u6aa2\u67e5\u7576\u524d\u9396\u7684\u503c\u662f\u5426\u8207\u6211\u5011\u7684\u552f\u4e00\u6a19\u8b58\u7b26\u76f8\u540c\uff0c\u53ea\u6709\u5728\u76f8\u540c\u7684\u60c5\u6cc1\u4e0b\u624d\u91cb\u653e\u9396\u3002<\/p>\n
2. \u81ea\u52d5\u5ef6\u9577\u9396\u7684\u904e\u671f\u6642\u9593<\/h3>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6301\u6709\u9396\u7684\u9032\u7a0b\u53ef\u80fd\u9700\u8981\u66f4\u9577\u7684\u6642\u9593\u4f86\u5b8c\u6210\u4efb\u52d9\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u6211\u5011\u53ef\u4ee5\u5b9a\u671f\u5ef6\u9577\u9396\u7684\u904e\u671f\u6642\u9593\u3002\u9019\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u4e00\u500b\u5b9a\u6642\u4efb\u52d9\u4f86\u5be6\u73fe\uff1a<\/p>\n
\nif redis.call(\"EXISTS\", \"lock_key\") == 1 then\n    redis.call(\"EXPIRE\", \"lock_key\", new_expire_time)\nend\n<\/code><\/pre>\n
3. \u4f7f\u7528 Redisson \u7b49\u9ad8\u7d1a\u5eab<\/h3>\n
\u5982\u679c\u4e0d\u60f3\u81ea\u5df1\u5be6\u73fe\u9396\u7684\u908f\u8f2f\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 Redisson \u7b49\u9ad8\u7d1a\u5eab\u3002\u9019\u4e9b\u5eab\u63d0\u4f9b\u4e86\u66f4\u70ba\u5b8c\u5584\u7684\u9396\u6a5f\u5236\uff0c\u4e26\u4e14\u5167\u7f6e\u4e86\u8d85\u6642\u548c\u91cd\u8a66\u7684\u529f\u80fd\uff0c\u80fd\u5920\u6709\u6548\u6e1b\u5c11\u958b\u767c\u8005\u7684\u5de5\u4f5c\u91cf\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u9396\u8d85\u6642\u554f\u984c\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\u662f\u4e00\u500b\u5e38\u898b\u7684\u6311\u6230\uff0c\u4f46\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002\u7121\u8ad6\u662f\u4f7f\u7528 Lua \u8173\u672c\u3001\u5b9a\u671f\u5ef6\u9577\u9396\u7684\u904e\u671f\u6642\u9593\uff0c\u9084\u662f\u5229\u7528\u9ad8\u7d1a\u5eab\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6848\u3002<\/p>\n
\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002Server.HK \u63d0\u4f9b\u591a\u7a2e \u9999\u6e2fVPS<\/a> \u670d\u52d9\uff0c\u5e6b\u52a9\u60a8\u69cb\u5efa\u7a69\u5b9a\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\uff0c\u4e26\u6709\u6548\u89e3\u6c7a\u9396\u8d85\u6642\u554f\u984c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5982\u4f55\u57fa\u65bc Redis \u89e3\u6c7a\u9396\u8d85\u6642\u554f\u984c\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u6027\u80fd\uff0c\u78ba\u4fdd\u8cc7\u6e90\u6709\u6548\u7ba1\u7406\u8207\u4f7f\u7528\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-161663","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161663","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=161663"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161663\/revisions"}],"predecessor-version":[{"id":161664,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161663\/revisions\/161664"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}