{"id":197687,"date":"2024-11-14T09:52:55","date_gmt":"2024-11-14T01:52:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/197687\/"},"modified":"2024-11-14T09:52:56","modified_gmt":"2024-11-14T01:52:56","slug":"%e5%88%a9%e7%94%a8setnx%e5%af%a6%e7%8f%beredis%e4%b8%ad%e7%9a%84%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c%ef%bc%88setnx-redis%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/197687\/","title":{"rendered":"\u5229\u7528setnx\u5be6\u73feredis\u4e2d\u7684\u539f\u5b50\u64cd\u4f5c\uff08setnx( redis\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8setnx%e5%af%a6%e7%8f%beredis%e4%b8%ad%e7%9a%84%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-ISQUXIVUbc\">\u5229\u7528setnx\u5be6\u73feRedis\u4e2d\u7684\u539f\u5b50\u64cd\u4f5c<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u539f\u5b50\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u64cd\u4f5c\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u539f\u5b50\u6027\u3002\u5176\u4e2d\uff0c<code>SETNX<\/code>\uff08SET if Not eXists\uff09\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u547d\u4ee4\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728Redis\u4e2d\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e<code>SETNX<\/code>\u7684\u5de5\u4f5c\u539f\u7406\u53ca\u5176\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"setnx%e5%91%bd%e4%bb%a4%e6%a6%82%e8%bf%b0-ISQUXIVUbc\">SETNX\u547d\u4ee4\u6982\u8ff0<\/h2>\n<p><code>SETNX<\/code>\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSet if Not eXists\u201d\uff0c\u5176\u4e3b\u8981\u529f\u80fd\u662f\u5c07\u4e00\u500b\u9375\u8a2d\u7f6e\u70ba\u6307\u5b9a\u7684\u503c\uff0c\u524d\u63d0\u662f\u8a72\u9375\u4e0d\u5b58\u5728\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u8a72\u9375\u5df2\u7d93\u5b58\u5728\uff0c\u5247\u4e0d\u6703\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\uff0c\u8fd4\u56de0\uff1b\u5982\u679c\u8a72\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8a2d\u7f6e\u6210\u529f\uff0c\u8fd4\u56de1\u3002<\/p>\n<pre><code>SETNX key value\n<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u57f7\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>SETNX mykey \"Hello\"\n<\/code><\/pre>\n<p>\u5982\u679c<code>mykey<\/code>\u4e0d\u5b58\u5728\uff0c\u5247\u6703\u88ab\u8a2d\u7f6e\u70ba<code>\"Hello\"<\/code>\uff0c\u4e26\u8fd4\u56de1\uff1b\u5982\u679c\u5df2\u7d93\u5b58\u5728\uff0c\u5247\u4e0d\u6703\u6539\u8b8a\u5176\u503c\uff0c\u4e26\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"setnx%e7%9a%84%e5%8e%9f%e5%ad%90%e6%80%a7-ISQUXIVUbc\">SETNX\u7684\u539f\u5b50\u6027<\/h2>\n<p>Redis\u7684\u6240\u6709\u547d\u4ee4\u90fd\u662f\u539f\u5b50\u6027\u7684\uff0c\u9019\u610f\u5473\u8457\u5728\u57f7\u884c<code>SETNX<\/code>\u6642\uff0c\u4e0d\u6703\u6709\u5176\u4ed6\u64cd\u4f5c\u5e72\u64fe\u5176\u57f7\u884c\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97<code>SETNX<\/code>\u975e\u5e38\u9069\u5408\u7528\u65bc\u5be6\u73fe\u9396\u6a5f\u5236\u3002\u4f8b\u5982\uff0c\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u7576\u591a\u500b\u9032\u7a0b\u9700\u8981\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528<code>SETNX<\/code>\u4f86\u78ba\u4fdd\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u7372\u5f97\u9396\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8setnx%e5%af%a6%e7%8f%be%e5%88%86%e4%bd%88%e5%bc%8f%e9%8e%96-ISQUXIVUbc\">\u4f7f\u7528SETNX\u5be6\u73fe\u5206\u4f48\u5f0f\u9396<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528<code>SETNX<\/code>\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>SETNX lock_key \"locked\"\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u4e00\u500b\u9032\u7a0b\u60f3\u8981\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u5617\u8a66\u57f7\u884c<code>SETNX lock_key \"locked\"<\/code>\u3002\u5982\u679c\u8fd4\u56de1\uff0c\u5247\u8868\u793a\u9396\u7372\u53d6\u6210\u529f\uff1b\u5982\u679c\u8fd4\u56de0\uff0c\u5247\u8868\u793a\u9396\u5df2\u7d93\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u3002<\/p>\n<p>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0c\u901a\u5e38\u9084\u9700\u8981\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u3002\u53ef\u4ee5\u4f7f\u7528<code>EXPIRE<\/code>\u547d\u4ee4\u4f86\u8a2d\u7f6e\u9396\u7684\u6709\u6548\u671f\uff1a<\/p>\n<pre><code>SETNX lock_key \"locked\"\nEXPIRE lock_key 30\n<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u5373\u4f7f\u7372\u53d6\u9396\u7684\u9032\u7a0b\u572830\u79d2\u5167\u6c92\u6709\u91cb\u653e\u9396\uff0c\u9396\u4e5f\u6703\u81ea\u52d5\u904e\u671f\uff0c\u5f9e\u800c\u907f\u514d\u6b7b\u9396\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"setnx%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-ISQUXIVUbc\">SETNX\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u9664\u4e86\u5206\u4f48\u5f0f\u9396\uff0c<code>SETNX<\/code>\u9084\u53ef\u4ee5\u7528\u65bc\u5176\u4ed6\u591a\u7a2e\u5834\u666f\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>\u9632\u6b62\u91cd\u8907\u64cd\u4f5c\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u9632\u6b62\u540c\u4e00\u64cd\u4f5c\u88ab\u91cd\u8907\u57f7\u884c\u3002\u4f7f\u7528<code>SETNX<\/code>\u53ef\u4ee5\u78ba\u4fdd\u67d0\u500b\u64cd\u4f5c\u53ea\u57f7\u884c\u4e00\u6b21\u3002<\/li>\n<li><strong>\u521d\u59cb\u5316\u8a2d\u7f6e\uff1a<\/strong>\u5728\u61c9\u7528\u555f\u52d5\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528<code>SETNX<\/code>\u4f86\u521d\u59cb\u5316\u67d0\u4e9b\u914d\u7f6e\uff0c\u53ea\u5728\u7b2c\u4e00\u6b21\u555f\u52d5\u6642\u8a2d\u7f6e\u3002<\/li>\n<li><strong>\u9650\u6d41\u63a7\u5236\uff1a<\/strong>\u5728\u9ad8\u4e26\u767c\u5834\u666f\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>SETNX<\/code>\u4f86\u63a7\u5236\u67d0\u4e9b\u64cd\u4f5c\u7684\u57f7\u884c\u983b\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ISQUXIVUbc\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0c<code>SETNX<\/code>\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728Redis\u4e2d\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u5728\u5206\u4f48\u5f0f\u9396\u3001\u521d\u59cb\u5316\u8a2d\u7f6e\u9084\u662f\u9632\u6b62\u91cd\u8907\u64cd\u4f5c\u7b49\u5834\u666f\u4e2d\uff0c<code>SETNX<\/code>\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u5b58\u5132\u548c\u7ba1\u7406\u7684\u61c9\u7528\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684<code>VPS<\/code>\u89e3\u6c7a\u65b9\u6848\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u82e5\u60a8\u5c0d\u65bc<code>\u9999\u6e2fVPS<\/code>\u6216\u5176\u4ed6<code>\u4e91\u670d\u52a1\u5668<\/code>\u7684\u9700\u6c42\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f<a href=\"https:\/\/server.hk\">Server.HK<\/a>\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5229\u7528Redis\u4e2d\u7684setnx\u547d\u4ee4\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u907f\u514d\u7af6\u722d\u689d\u4ef6\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-197687","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197687","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=197687"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197687\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=197687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=197687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=197687"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}