{"id":167357,"date":"2024-11-06T00:30:27","date_gmt":"2024-11-05T16:30:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167357\/"},"modified":"2024-11-06T00:30:27","modified_gmt":"2024-11-05T16:30:27","slug":"%e5%88%a9%e7%94%a8redis%e9%9b%86%e7%be%a4%e5%b0%87%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%e9%8e%96%e5%ae%9asetnx%e5%af%a6%e8%b8%90%ef%bc%88redis%e9%9b%86%e7%be%a4setnx%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167357\/","title":{"rendered":"\u5229\u7528Redis\u96c6\u7fa4\u5c07\u6578\u64da\u5b89\u5168\u9396\u5b9aSETNX\u5be6\u8e10\uff08redis\u96c6\u7fa4setnx\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8redis%e9%9b%86%e7%be%a4%e5%b0%87%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%e9%8e%96%e5%ae%9asetnx%e5%af%a6%e8%b8%90%ef%bc%88redis%e9%9b%86%e7%be%a4setnx%ef%bc%89-CRqeFEBbCy\">\u5229\u7528Redis\u96c6\u7fa4\u5c07\u6578\u64da\u5b89\u5168\u9396\u5b9aSETNX\u5be6\u8e10\uff08redis\u96c6\u7fa4setnx\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u4e00\u81f4\u6027\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u7ba1\u7406\u6578\u64da\u3002\u5176\u4e2d\uff0cSETNX\u547d\u4ee4\uff08SET if Not eXists\uff09\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u7684\u5834\u666f\u4e2d\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Redis\u96c6\u7fa4\u4e2d\u5229\u7528SETNX\u547d\u4ee4\u4f86\u5be6\u73fe\u6578\u64da\u7684\u5b89\u5168\u9396\u5b9a\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsetnx%e5%91%bd%e4%bb%a4%ef%bc%9f-CRqeFEBbCy\">\u4ec0\u9ebc\u662fSETNX\u547d\u4ee4\uff1f<\/h2>\n<p>SETNX\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSET if Not eXists\u201d\uff0c\u5b83\u7684\u529f\u80fd\u662f\u53ea\u6709\u5728\u6307\u5b9a\u7684\u9375\u4e0d\u5b58\u5728\u6642\uff0c\u624d\u6703\u8a2d\u7f6e\u8a72\u9375\u7684\u503c\u3002\u9019\u4f7f\u5f97SETNX\u975e\u5e38\u9069\u5408\u7528\u65bc\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u9632\u6b62\u591a\u500b\u9032\u7a0b\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u3002<\/p>\n<pre><code>SETNX key value\n<\/code><\/pre>\n<p>\u5982\u679c\u9375\u5df2\u7d93\u5b58\u5728\uff0cSETNX\u5c07\u8fd4\u56de0\uff1b\u5982\u679c\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8a2d\u7f6e\u9375\u4e26\u8fd4\u56de1\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97SETNX\u6210\u70ba\u5be6\u73fe\u9396\u5b9a\u6a5f\u5236\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n<h2 id=\"redis%e9%9b%86%e7%be%a4%e4%b8%ad%e7%9a%84setnx%e5%af%a6%e8%b8%90-CRqeFEBbCy\">Redis\u96c6\u7fa4\u4e2d\u7684SETNX\u5be6\u8e10<\/h2>\n<p>\u5728Redis\u96c6\u7fa4\u4e2d\uff0c\u6578\u64da\u88ab\u5206\u6563\u5b58\u5132\u5728\u591a\u500b\u7bc0\u9ede\u4e0a\u3002\u9019\u610f\u5473\u8457\u5728\u4f7f\u7528SETNX\u547d\u4ee4\u6642\uff0c\u9700\u8981\u8003\u616e\u5230\u96c6\u7fa4\u7684\u7279\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528SETNX\u547d\u4ee4\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e7%8d%b2%e5%8f%96%e9%8e%96-CRqeFEBbCy\">1. \u7372\u53d6\u9396<\/h3>\n<p>\u9996\u5148\uff0c\u5ba2\u6236\u7aef\u9700\u8981\u5617\u8a66\u7372\u53d6\u9396\u3002\u9019\u53ef\u4ee5\u901a\u904e\u57f7\u884cSETNX\u547d\u4ee4\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SETNX lock_key unique_lock_value\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`lock_key`\u662f\u9396\u7684\u540d\u7a31\uff0c\u800c`unique_lock_value`\u662f\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff0c\u7528\u65bc\u6a19\u8b58\u9396\u7684\u64c1\u6709\u8005\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u5176\u4ed6\u5ba2\u6236\u7aef\u610f\u5916\u91cb\u653e\u9396\u3002<\/p>\n<h3 id=\"2-%e8%a8%ad%e7%bd%ae%e9%8e%96%e7%9a%84%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93-CRqeFEBbCy\">2. \u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593<\/h3>\n<p>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\u60c5\u6cc1\u7684\u767c\u751f\uff0c\u61c9\u8a72\u70ba\u9396\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528EXPIRE\u547d\u4ee4\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>EXPIRE lock_key expiration_time\n<\/code><\/pre>\n<p>\u9019\u88e1\u7684`expiration_time`\u662f\u9396\u7684\u6709\u6548\u6642\u9593\uff0c\u901a\u5e38\u8a2d\u7f6e\u70ba\u4e00\u500b\u5408\u7406\u7684\u503c\uff0c\u4ee5\u78ba\u4fdd\u5728\u6b63\u5e38\u60c5\u6cc1\u4e0b\u9396\u80fd\u5920\u88ab\u91cb\u653e\u3002<\/p>\n<h3 id=\"3-%e9%87%8b%e6%94%be%e9%8e%96-CRqeFEBbCy\">3. \u91cb\u653e\u9396<\/h3>\n<p>\u7576\u64cd\u4f5c\u5b8c\u6210\u5f8c\uff0c\u5ba2\u6236\u7aef\u9700\u8981\u91cb\u653e\u9396\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u9396\u7684\u64c1\u6709\u8005\u4f86\u78ba\u4fdd\u53ea\u6709\u64c1\u6709\u9396\u7684\u5ba2\u6236\u7aef\u624d\u80fd\u91cb\u653e\u5b83\uff1a<\/p>\n<pre><code>if (GET lock_key == unique_lock_value) {\n    DEL lock_key\n}\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u9396\u7684\u5b89\u5168\u91cb\u653e\uff0c\u907f\u514d\u5176\u4ed6\u5ba2\u6236\u7aef\u8aa4\u91cb\u653e\u9396\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-CRqeFEBbCy\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528SETNX\u547d\u4ee4\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u9396\u7684\u552f\u4e00\u6027\uff1a\u4f7f\u7528\u552f\u4e00\u7684\u6a19\u8b58\u7b26\u4f86\u6a19\u8b58\u9396\u7684\u64c1\u6709\u8005\u3002<\/li>\n<li>\u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff1a\u904e\u671f\u6642\u9593\u61c9\u6839\u64da\u696d\u52d9\u9700\u6c42\u9032\u884c\u8a2d\u7f6e\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u3002<\/li>\n<li>\u8003\u616e\u7db2\u7d61\u5ef6\u9072\uff1a\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u7db2\u7d61\u5ef6\u9072\u53ef\u80fd\u6703\u5f71\u97ff\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\uff0c\u56e0\u6b64\u9700\u8981\u9032\u884c\u9069\u7576\u7684\u932f\u8aa4\u8655\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-CRqeFEBbCy\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528Redis\u96c6\u7fa4\u4e2d\u7684SETNX\u547d\u4ee4\u53ef\u4ee5\u6709\u6548\u5730\u5be6\u73fe\u6578\u64da\u7684\u5b89\u5168\u9396\u5b9a\uff0c\u5f9e\u800c\u4fdd\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u8e10\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6e90\uff0c\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u640d\u58de\u7684\u98a8\u96aa\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u6578\u64da\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u90e8\u7f72\u60a8\u7684Redis\u96c6\u7fa4\uff0c\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u904b\u884c\u7a69\u5b9a\u4e14\u5b89\u5168\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5229\u7528Redis\u96c6\u7fa4\u4e2d\u7684SETNX\u547d\u4ee4\u5be6\u73fe\u6578\u64da\u5b89\u5168\u9396\u5b9a\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u6027\u80fd\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-167357","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167357","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=167357"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167357\/revisions"}],"predecessor-version":[{"id":167358,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167357\/revisions\/167358"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=167357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=167357"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=167357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}