{"id":154337,"date":"2024-11-02T14:58:22","date_gmt":"2024-11-02T06:58:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154337\/"},"modified":"2024-11-02T14:58:23","modified_gmt":"2024-11-02T06:58:23","slug":"%e5%ae%9aredis%e5%af%a6%e7%8f%be%e7%9a%84%e9%a4%98%e9%a1%8d%e9%8e%96%e5%ae%9a%e5%8a%9f%e8%83%bd%ef%bc%88redis%e7%9a%84%e9%a4%98%e9%a1%8d%e9%8e%96%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154337\/","title":{"rendered":"\u5b9aRedis\u5be6\u73fe\u7684\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff08redis\u7684\u9918\u984d\u9396\uff09"},"content":{"rendered":"<h1 id=\"%e5%ae%9aredis%e5%af%a6%e7%8f%be%e7%9a%84%e9%a4%98%e9%a1%8d%e9%8e%96%e5%ae%9a%e5%8a%9f%e8%83%bd%ef%bc%88redis%e7%9a%84%e9%a4%98%e9%a1%8d%e9%8e%96%ef%bc%89-hSPoPVtTkt\">\u5b9aRedis\u5be6\u73fe\u7684\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff08Redis\u7684\u9918\u984d\u9396\uff09<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u8cc7\u6599\u5eab\u7684\u6027\u80fd\u548c\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5feb\u901f\u8b80\u53d6\u548c\u5beb\u5165\u7684\u60c5\u6cc1\u4e0b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff0c\u9019\u5728\u91d1\u878d\u4ea4\u6613\u3001\u96fb\u5b50\u5546\u52d9\u7b49\u9818\u57df\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%a4%98%e9%a1%8d%e9%8e%96%e5%ae%9a%e5%8a%9f%e8%83%bd%ef%bc%9f-hSPoPVtTkt\">\u4ec0\u9ebc\u662f\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff1f<\/h2>\n<p>\u9918\u984d\u9396\u5b9a\u529f\u80fd\u662f\u6307\u5728\u9032\u884c\u4ea4\u6613\u6642\uff0c\u7cfb\u7d71\u6703\u66ab\u6642\u9396\u5b9a\u7528\u6236\u7684\u9918\u984d\uff0c\u4ee5\u9632\u6b62\u5728\u4ea4\u6613\u5b8c\u6210\u4e4b\u524d\uff0c\u8a72\u9918\u984d\u88ab\u5176\u4ed6\u64cd\u4f5c\u6240\u5f71\u97ff\u3002\u9019\u4e00\u529f\u80fd\u80fd\u5920\u6709\u6548\u907f\u514d\u8d85\u8ce3\u6216\u8cc7\u91d1\u932f\u8aa4\u7684\u60c5\u6cc1\u767c\u751f\uff0c\u78ba\u4fdd\u4ea4\u6613\u7684\u5b89\u5168\u6027\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%81%b8%e6%93%87redis%ef%bc%9f-hSPoPVtTkt\">\u70ba\u4ec0\u9ebc\u9078\u64c7Redis\uff1f<\/h2>\n<p>Redis\u662f\u4e00\u7a2e\u57fa\u65bc\u5167\u5b58\u7684\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u5177\u6709\u4ee5\u4e0b\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u6027\u80fd\uff1a<\/strong>Redis\u80fd\u5920\u4ee5\u6beb\u79d2\u7d1a\u7684\u901f\u5ea6\u8655\u7406\u6578\u64da\uff0c\u9069\u5408\u9700\u8981\u5feb\u901f\u97ff\u61c9\u7684\u61c9\u7528\u3002<\/li>\n<li><strong>\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff1a<\/strong>Redis\u652f\u6301\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u7b49\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u9748\u6d3b\u6027\u9ad8\u3002<\/li>\n<li><strong>\u6301\u4e45\u5316\u9078\u9805\uff1a<\/strong>Redis\u63d0\u4f9b\u591a\u7a2e\u6301\u4e45\u5316\u6a5f\u5236\uff0c\u80fd\u5920\u5728\u7cfb\u7d71\u91cd\u555f\u5f8c\u6062\u5fa9\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e7%8f%be%e9%a4%98%e9%a1%8d%e9%8e%96%e5%ae%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%80%9d%e8%b7%af-hSPoPVtTkt\">\u5be6\u73fe\u9918\u984d\u9396\u5b9a\u7684\u57fa\u672c\u601d\u8def<\/h2>\n<p>\u5be6\u73fe\u9918\u984d\u9396\u5b9a\u529f\u80fd\u7684\u57fa\u672c\u601d\u8def\u662f\u4f7f\u7528Redis\u7684\u539f\u5b50\u64cd\u4f5c\u4f86\u78ba\u4fdd\u5728\u4ea4\u6613\u904e\u7a0b\u4e2d\u9918\u984d\u4e0d\u6703\u88ab\u5176\u4ed6\u64cd\u4f5c\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u7684\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e9%8e%96%e5%ae%9a%e9%a4%98%e9%a1%8d-hSPoPVtTkt\">1. \u9396\u5b9a\u9918\u984d<\/h3>\n<p>\u5728\u9032\u884c\u4ea4\u6613\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u9396\u5b9a\u7528\u6236\u7684\u9918\u984d\u3002\u9019\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u4e00\u500b\u6a19\u8a8c\u4f86\u5be6\u73fe\uff0c\u8868\u793a\u8a72\u7528\u6236\u7684\u9918\u984d\u6b63\u5728\u88ab\u4f7f\u7528\u4e2d\u3002<\/p>\n<pre><code>SETNX user:balance:lock 1\n<\/code><\/pre>\n<p>\u9019\u88e1\u4f7f\u7528\u4e86SETNX\u547d\u4ee4\uff0c\u53ea\u6709\u7576\u9396\u4e0d\u5b58\u5728\u6642\u624d\u6703\u8a2d\u7f6e\u6210\u529f\u3002\u5982\u679c\u8fd4\u56de\u503c\u70ba0\uff0c\u5247\u8868\u793a\u9918\u984d\u5df2\u7d93\u88ab\u9396\u5b9a\u3002<\/p>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e9%a4%98%e9%a1%8d-hSPoPVtTkt\">2. \u6aa2\u67e5\u9918\u984d<\/h3>\n<p>\u5728\u9396\u5b9a\u6210\u529f\u5f8c\uff0c\u6aa2\u67e5\u7528\u6236\u7684\u9918\u984d\u662f\u5426\u8db3\u5920\u9032\u884c\u4ea4\u6613\u3002<\/p>\n<pre><code>if (GET user:balance &gt;= transaction_amount) {\n    \/\/ \u9032\u884c\u4ea4\u6613\n}\n<\/code><\/pre>\n<h3 id=\"3-%e6%9b%b4%e6%96%b0%e9%a4%98%e9%a1%8d-hSPoPVtTkt\">3. \u66f4\u65b0\u9918\u984d<\/h3>\n<p>\u5982\u679c\u9918\u984d\u8db3\u5920\uff0c\u5247\u53ef\u4ee5\u9032\u884c\u4ea4\u6613\u4e26\u66f4\u65b0\u9918\u984d\u3002<\/p>\n<pre><code>DECRBY user:balance transaction_amount\n<\/code><\/pre>\n<h3 id=\"4-%e9%87%8b%e6%94%be%e9%8e%96-hSPoPVtTkt\">4. \u91cb\u653e\u9396<\/h3>\n<p>\u4ea4\u6613\u5b8c\u6210\u5f8c\uff0c\u91cb\u653e\u9396\u4ee5\u5141\u8a31\u5176\u4ed6\u64cd\u4f5c\u3002<\/p>\n<pre><code>DEL user:balance:lock\n<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-hSPoPVtTkt\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\u4ee3\u78bc\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528Redis\u5be6\u73fe\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff1a<\/p>\n<pre><code>function processTransaction(userId, transactionAmount) {\n    \/\/ \u9396\u5b9a\u9918\u984d\n    if (redis.setnx(`user:${userId}:balance:lock`, 1)) {\n        \/\/ \u6aa2\u67e5\u9918\u984d\n        const balance = redis.get(`user:${userId}:balance`);\n        if (balance &gt;= transactionAmount) {\n            \/\/ \u66f4\u65b0\u9918\u984d\n            redis.decrby(`user:${userId}:balance`, transactionAmount);\n            console.log('Transaction successful');\n        } else {\n            console.log('Insufficient balance');\n        }\n        \/\/ \u91cb\u653e\u9396\n        redis.del(`user:${userId}:balance:lock`);\n    } else {\n        console.log('Balance is locked, please try again later');\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-hSPoPVtTkt\">\u7d50\u8ad6<\/h2>\n<p>\u5229\u7528Redis\u5be6\u73fe\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u4ea4\u6613\u7684\u5b89\u5168\u6027\u548c\u6e96\u78ba\u6027\u3002\u901a\u904e\u539f\u5b50\u64cd\u4f5c\u4f86\u9396\u5b9a\u548c\u6aa2\u67e5\u9918\u984d\uff0c\u80fd\u5920\u907f\u514d\u56e0\u4e26\u767c\u64cd\u4f5c\u5c0e\u81f4\u7684\u8cc7\u91d1\u932f\u8aa4\u3002\u96a8\u8457\u61c9\u7528\u9700\u6c42\u7684\u589e\u9577\uff0cRedis\u7684\u9ad8\u6027\u80fd\u548c\u9748\u6d3b\u6027\u4f7f\u5176\u6210\u70ba\u5be6\u73fe\u6b64\u985e\u529f\u80fd\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u4f7f\u7528Redis\u5be6\u73fe\u9918\u984d\u9396\u5b9a\u529f\u80fd\uff0c\u78ba\u4fdd\u8cc7\u91d1\u5b89\u5168\u8207\u4ea4\u6613\u4e00\u81f4\u6027\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u53ef\u9760\u6027\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-154337","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154337","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=154337"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154337\/revisions"}],"predecessor-version":[{"id":154338,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154337\/revisions\/154338"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}