{"id":168925,"date":"2024-11-06T17:24:25","date_gmt":"2024-11-06T09:24:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168925\/"},"modified":"2024-11-06T17:24:26","modified_gmt":"2024-11-06T09:24:26","slug":"%e8%ac%8e%e4%b9%8bredis%e9%8e%96%e4%b8%80%e8%bc%aa%e5%8f%88%e4%b8%80%e8%bc%aa%e7%9a%84%e5%95%8f%e8%99%9f%ef%bc%88redis%e9%8e%96%e4%b8%8d%e4%b8%8a%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168925\/","title":{"rendered":"\u8b0e\u4e4bredis\u9396\u4e00\u8f2a\u53c8\u4e00\u8f2a\u7684\u554f\u865f\uff08redis\u9396\u4e0d\u4e0a\uff09"},"content":{"rendered":"

\u8b0e\u4e4bRedis\u9396\u4e00\u8f2a\u53c8\u4e00\u8f2a\u7684\u554f\u865f\uff08Redis\u9396\u4e0d\u4e0a\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\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\u4f46\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u300cRedis\u9396\u4e0d\u4e0a\u300d\u7684\u554f\u984c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eRedis\u9396\u7684\u5de5\u4f5c\u539f\u7406\u3001\u5e38\u898b\u554f\u984c\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n

Redis\u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

Redis\u9396\u901a\u5e38\u662f\u57fa\u65bcSETNX\u547d\u4ee4\u5be6\u73fe\u7684\u3002SETNX\u547d\u4ee4\u7684\u5168\u540d\u662f\u300cSET if Not eXists\u300d\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u7576\u9375\u4e0d\u5b58\u5728\u6642\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u4e26\u8fd4\u56de1\uff1b\u5982\u679c\u9375\u5df2\u5b58\u5728\uff0c\u5247\u8fd4\u56de0\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97SETNX\u6210\u70ba\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n

SETNX lock_key unique_lock_value\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0clock_key<\/code>\u662f\u9396\u7684\u540d\u7a31\uff0c\u800cunique_lock_value<\/code>\u5247\u662f\u7528\u65bc\u6a19\u8b58\u9396\u7684\u552f\u4e00\u503c\u3002\u7576\u4e00\u500b\u9032\u7a0b\u6210\u529f\u7372\u53d6\u9396\u6642\uff0c\u5b83\u53ef\u4ee5\u57f7\u884c\u81e8\u754c\u5340\u7684\u64cd\u4f5c\uff0c\u7136\u5f8c\u91cb\u653e\u9396\u3002<\/p>\n
Redis\u9396\u7684\u5e38\u898b\u554f\u984c<\/h2>\n
1. \u9396\u7121\u6cd5\u7372\u53d6<\/h3>\n
\u7576\u591a\u500b\u9032\u7a0b\u540c\u6642\u5617\u8a66\u7372\u53d6\u540c\u4e00\u628a\u9396\u6642\uff0c\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u6210\u529f\u7372\u53d6\u9396\uff0c\u5176\u4ed6\u9032\u7a0b\u5247\u6703\u5931\u6557\u3002\u9019\u53ef\u80fd\u5c0e\u81f4\u67d0\u4e9b\u8acb\u6c42\u7121\u6cd5\u7372\u53d6\u9396\uff0c\u5f9e\u800c\u5f71\u97ff\u7cfb\u7d71\u7684\u6b63\u5e38\u904b\u884c\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u3002<\/p>\n
2. \u9396\u7684\u904e\u671f\u554f\u984c<\/h3>\n
\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0cRedis\u9396\u901a\u5e38\u6703\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u3002\u5982\u679c\u6301\u6709\u9396\u7684\u9032\u7a0b\u5728\u904e\u671f\u4e4b\u524d\u672a\u80fd\u91cb\u653e\u9396\uff0c\u5247\u9396\u6703\u81ea\u52d5\u91cb\u653e\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u9396\u4e26\u57f7\u884c\u64cd\u4f5c\u3002\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n
3. \u9396\u7684\u91cd\u5165\u6027<\/h3>\n
Redis\u9396\u7684\u8a2d\u8a08\u4e26\u4e0d\u652f\u6301\u91cd\u5165\u6027\uff0c\u9019\u610f\u5473\u8457\u540c\u4e00\u500b\u9032\u7a0b\u5728\u7372\u53d6\u9396\u5f8c\u518d\u6b21\u5617\u8a66\u7372\u53d6\u9396\u6703\u5c0e\u81f4\u6b7b\u9396\u3002\u56e0\u6b64\uff0c\u5728\u8a2d\u8a08\u7cfb\u7d71\u6642\uff0c\u9700\u8981\u7279\u5225\u6ce8\u610f\u9396\u7684\u4f7f\u7528\u65b9\u5f0f\u3002<\/p>\n
\u89e3\u6c7a\u65b9\u6848<\/h2>\n
1. \u4f7f\u7528Redisson\u7b49\u9ad8\u7d1a\u5eab<\/h3>\n
\u70ba\u4e86\u7c21\u5316\u9396\u7684\u7ba1\u7406\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528Redisson\u7b49\u9ad8\u7d1a\u5eab\u3002\u9019\u4e9b\u5eab\u63d0\u4f9b\u4e86\u66f4\u70ba\u8c50\u5bcc\u7684\u9396\u7ba1\u7406\u529f\u80fd\uff0c\u5305\u62ec\u91cd\u5165\u9396\u3001\u53ef\u91cd\u5165\u9396\u7b49\uff0c\u80fd\u5920\u6709\u6548\u89e3\u6c7a\u4e0a\u8ff0\u554f\u984c\u3002<\/p>\n
2. \u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593<\/h3>\n
\u5728\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u6642\uff0c\u61c9\u6839\u64da\u696d\u52d9\u908f\u8f2f\u548c\u64cd\u4f5c\u7684\u57f7\u884c\u6642\u9593\u4f86\u5408\u7406\u8a2d\u7f6e\uff0c\u907f\u514d\u56e0\u904e\u671f\u5c0e\u81f4\u7684\u6578\u64da\u4e0d\u4e00\u81f4\u554f\u984c\u3002<\/p>\n
3. \u4f7f\u7528Lua\u8173\u672c\u539f\u5b50\u64cd\u4f5c<\/h3>\n
Redis\u652f\u6301Lua\u8173\u672c\uff0c\u53ef\u4ee5\u5c07\u7372\u53d6\u9396\u548c\u57f7\u884c\u64cd\u4f5c\u7684\u908f\u8f2f\u653e\u5728\u540c\u4e00\u500bLua\u8173\u672c\u4e2d\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u5f9e\u800c\u907f\u514d\u9396\u7684\u554f\u984c\u3002<\/p>\n
\nlocal lock = redis.call('SETNX', KEYS[1], ARGV[1])\nif lock == 1 then\n    redis.call('EXPIRE', KEYS[1], ARGV[2])\nend\nreturn lock\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
Redis\u9396\u7684\u4f7f\u7528\u96d6\u7136\u7c21\u55ae\uff0c\u4f46\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u537b\u53ef\u80fd\u5f15\u767c\u4e00\u7cfb\u5217\u554f\u984c\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u4f7f\u7528\u9ad8\u7d1a\u5eab\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u300cRedis\u9396\u4e0d\u4e0a\u300d\u7684\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u7a69\u5b9a\u7684\u670d\u52d9\u5668\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u8b0e\u4e4bRedis\u9396\u7684\u6311\u6230\uff0c\u63ed\u793a\u9396\u4e0d\u4e0a\u554f\u984c\u7684\u6839\u6e90\u8207\u89e3\u6c7a\u65b9\u6848\uff0c\u52a9\u4f60\u8f15\u9b06\u638c\u63e1Redis\u9396\u7684\u904b\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-168925","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168925","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=168925"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168925\/revisions"}],"predecessor-version":[{"id":168926,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168925\/revisions\/168926"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}