{"id":129409,"date":"2024-10-26T21:24:21","date_gmt":"2024-10-26T13:24:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/129409\/"},"modified":"2024-10-26T21:24:22","modified_gmt":"2024-10-26T13:24:22","slug":"redis%e9%8e%96%e5%af%a6%e7%8f%be%e5%ba%ab%e5%ad%98%e6%8e%a7%e5%88%b6%e5%be%9e%e9%9b%b6%e9%96%8b%e5%a7%8b%ef%bc%88redis%e9%8e%96%e5%af%a6%e7%8f%be%e5%ba%ab%e5%ad%98%e6%89%a3%e6%b8%9b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/129409\/","title":{"rendered":"Redis\u9396\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\u5f9e\u96f6\u958b\u59cb\uff08redis\u9396\u5be6\u73fe\u5eab\u5b58\u6263\u6e1b\uff09"},"content":{"rendered":"<h1 id=\"redis%e9%8e%96%e5%af%a6%e7%8f%be%e5%ba%ab%e5%ad%98%e6%8e%a7%e5%88%b6%e5%be%9e%e9%9b%b6%e9%96%8b%e5%a7%8b-nAqaBvNhiH\">Redis\u9396\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\u5f9e\u96f6\u958b\u59cb<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u96fb\u5b50\u5546\u52d9\u74b0\u5883\u4e2d\uff0c\u5eab\u5b58\u7ba1\u7406\u662f\u4f01\u696d\u6210\u529f\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002\u96a8\u8457\u7528\u6236\u9700\u6c42\u7684\u589e\u52a0\uff0c\u5982\u4f55\u6709\u6548\u5730\u63a7\u5236\u5eab\u5b58\u6210\u70ba\u4e86\u8a31\u591a\u958b\u767c\u8005\u9762\u81e8\u7684\u6311\u6230\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u9396\u6a5f\u5236\u4f86\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\u3002\u672c\u6587\u5c07\u5f9e\u96f6\u958b\u59cb\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Redis\u9396\u4f86\u5be6\u73fe\u5eab\u5b58\u6263\u6e1b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e9%8e%96%ef%bc%9f-nAqaBvNhiH\">\u4ec0\u9ebc\u662fRedis\u9396\uff1f<\/h2>\n<p>Redis\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u4fdd\u8b77\u5171\u4eab\u8cc7\u6e90\u7684\u6a5f\u5236\uff0c\u78ba\u4fdd\u5728\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u8a2a\u554f\u6642\uff0c\u53ea\u6709\u4e00\u500b\u5ba2\u6236\u7aef\u53ef\u4ee5\u5c0d\u8cc7\u6e90\u9032\u884c\u64cd\u4f5c\u3002\u9019\u5c0d\u65bc\u5eab\u5b58\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\uff0c\u56e0\u70ba\u5982\u679c\u591a\u500b\u7528\u6236\u540c\u6642\u5617\u8a66\u8cfc\u8cb7\u76f8\u540c\u7684\u5546\u54c1\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5eab\u5b58\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e4%bd%bf%e7%94%a8redis%e9%8e%96%ef%bc%9f-nAqaBvNhiH\">\u70ba\u4ec0\u9ebc\u4f7f\u7528Redis\u9396\uff1f<\/h2>\n<ul>\n<li><strong>\u9ad8\u6548\u6027\uff1a<\/strong>Redis\u662f\u4e00\u500b\u57fa\u65bc\u5167\u5b58\u7684\u6578\u64da\u5eab\uff0c\u64cd\u4f5c\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u9069\u5408\u9ad8\u4e26\u767c\u5834\u666f\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6613\u7528\uff1a<\/strong>Redis\u63d0\u4f9b\u4e86\u7c21\u55ae\u7684API\u4f86\u5be6\u73fe\u9396\u7684\u529f\u80fd\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u4e0a\u624b\u3002<\/li>\n<li><strong>\u53ef\u64f4\u5c55\u6027\uff1a<\/strong>Redis\u652f\u6301\u5206\u4f48\u5f0f\u9396\uff0c\u9069\u5408\u5927\u578b\u61c9\u7528\u7684\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%beredis%e9%8e%96%e4%be%86%e6%8e%a7%e5%88%b6%e5%ba%ab%e5%ad%98-nAqaBvNhiH\">\u5982\u4f55\u5be6\u73feRedis\u9396\u4f86\u63a7\u5236\u5eab\u5b58<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528Redis\u9396\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e7%8d%b2%e5%8f%96%e9%8e%96-nAqaBvNhiH\">1. \u7372\u53d6\u9396<\/h3>\n<p>\u5728\u9032\u884c\u5eab\u5b58\u6263\u6e1b\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u7372\u53d6\u9396\u3002\u53ef\u4ee5\u4f7f\u7528SETNX\u547d\u4ee4\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SETNX lock_key unique_lock_value<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u70ba1\uff0c\u5247\u8868\u793a\u7372\u53d6\u9396\u6210\u529f\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u7372\u53d6\u3002<\/p>\n<h3 id=\"2-%e6%89%a3%e6%b8%9b%e5%ba%ab%e5%ad%98-nAqaBvNhiH\">2. \u6263\u6e1b\u5eab\u5b58<\/h3>\n<p>\u7372\u53d6\u9396\u5f8c\uff0c\u53ef\u4ee5\u5b89\u5168\u5730\u9032\u884c\u5eab\u5b58\u6263\u6e1b\u64cd\u4f5c\uff1a<\/p>\n<pre><code>if (\u5eab\u5b58 &gt; 0) {\n    \u5eab\u5b58--;\n    \/\/ \u66f4\u65b0\u5eab\u5b58\u5230\u6578\u64da\u5eab\n}<\/code><\/pre>\n<h3 id=\"3-%e9%87%8b%e6%94%be%e9%8e%96-nAqaBvNhiH\">3. \u91cb\u653e\u9396<\/h3>\n<p>\u64cd\u4f5c\u5b8c\u6210\u5f8c\uff0c\u5fc5\u9808\u91cb\u653e\u9396\uff0c\u4ee5\u4fbf\u5176\u4ed6\u5ba2\u6236\u7aef\u53ef\u4ee5\u7e7c\u7e8c\u64cd\u4f5c\uff1a<\/p>\n<pre><code>DEL lock_key<\/code><\/pre>\n<h2 id=\"%e5%ae%8c%e6%95%b4%e7%a4%ba%e4%be%8b-nAqaBvNhiH\">\u5b8c\u6574\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5b8c\u6574\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Redis\u9396\u4f86\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\uff1a<\/p>\n<pre><code>function reduceStock($productId) {\n    $lockKey = \"lock:product:\" . $productId;\n    $uniqueLockValue = uniqid();\n\n    \/\/ \u7372\u53d6\u9396\n    if (redis()-&gt;setnx($lockKey, $uniqueLockValue)) {\n        \/\/ \u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\n        redis()-&gt;expire($lockKey, 5);\n\n        \/\/ \u6263\u6e1b\u5eab\u5b58\n        $stock = getStock($productId);\n        if ($stock &gt; 0) {\n            reduceStockInDB($productId);\n            echo \"\u5eab\u5b58\u6263\u6e1b\u6210\u529f\";\n        } else {\n            echo \"\u5eab\u5b58\u4e0d\u8db3\";\n        }\n\n        \/\/ \u91cb\u653e\u9396\n        if (redis()-&gt;get($lockKey) === $uniqueLockValue) {\n            redis()-&gt;del($lockKey);\n        }\n    } else {\n        echo \"\u7372\u53d6\u9396\u5931\u6557\uff0c\u8acb\u7a0d\u5f8c\u91cd\u8a66\";\n    }\n}<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-nAqaBvNhiH\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u78ba\u4fdd\u9396\u7684\u904e\u671f\u6642\u9593\u8a2d\u7f6e\u5408\u7406\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u3002<\/li>\n<li>\u5728\u91cb\u653e\u9396\u6642\uff0c\u5fc5\u9808\u78ba\u8a8d\u9396\u7684\u64c1\u6709\u8005\uff0c\u4ee5\u907f\u514d\u8aa4\u91cb\u653e\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528Redlock\u7b97\u6cd5\u4f86\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\uff0c\u589e\u5f37\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nAqaBvNhiH\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Redis\u9396\u4f86\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\u662f\u4e00\u7a2e\u9ad8\u6548\u4e14\u53ef\u9760\u7684\u65b9\u6cd5\u3002\u901a\u904e\u6b63\u78ba\u7684\u9396\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514d\u5eab\u5b58\u6578\u64da\u7684\u4e0d\u4e00\u81f4\u6027\uff0c\u78ba\u4fdd\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u4e26\u767c\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u9396\u7b56\u7565\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u90e8\u7f72\u60a8\u7684\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5f9e\u96f6\u958b\u59cb\u4f7f\u7528Redis\u9396\u5be6\u73fe\u5eab\u5b58\u63a7\u5236\uff0c\u78ba\u4fdd\u5b89\u5168\u7684\u5eab\u5b58\u6263\u6e1b\u548c\u9ad8\u6548\u7684\u4e26\u767c\u8655\u7406\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-129409","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129409","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=129409"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129409\/revisions"}],"predecessor-version":[{"id":129410,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129409\/revisions\/129410"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=129409"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=129409"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=129409"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}