{"id":126397,"date":"2024-10-26T04:23:20","date_gmt":"2024-10-25T20:23:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/126397\/"},"modified":"2024-10-26T04:23:21","modified_gmt":"2024-10-25T20:23:21","slug":"redis-%e7%a7%92%e6%ae%ba%e5%af%a6%e7%8f%be%e9%9b%b6%e5%bb%b6%e6%99%82%e5%ba%ab%e5%ad%98%e6%89%a3%e6%b8%9b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/126397\/","title":{"rendered":"Redis \u79d2\u6bba\u5be6\u73fe\u96f6\u5ef6\u6642\u5eab\u5b58\u6263\u6e1b"},"content":{"rendered":"<h1 id=\"redis-%e7%a7%92%e6%ae%ba%e5%af%a6%e7%8f%be%e9%9b%b6%e5%bb%b6%e6%99%82%e5%ba%ab%e5%ad%98%e6%89%a3%e6%b8%9b-VjogpyIYeP\">Redis \u79d2\u6bba\u5be6\u73fe\u96f6\u5ef6\u6642\u5eab\u5b58\u6263\u6e1b<\/h1>\n<p>\u5728\u7576\u4eca\u96fb\u5b50\u5546\u52d9\u7684\u5feb\u901f\u767c\u5c55\u4e2d\uff0c\u79d2\u6bba\u6d3b\u52d5\u5df2\u6210\u70ba\u5438\u5f15\u9867\u5ba2\u7684\u91cd\u8981\u624b\u6bb5\u3002\u7136\u800c\uff0c\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u6fc0\u589e\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u5eab\u5b58\u4e26\u5be6\u73fe\u96f6\u5ef6\u6642\u7684\u5eab\u5b58\u6263\u6e1b\u6210\u70ba\u4e86\u4e00\u500b\u6311\u6230\u3002Redis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u7406\u60f3\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u61c9\u5c0d\u9019\u4e00\u6311\u6230\u3002<\/p>\n<h2 id=\"redis-%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-VjogpyIYeP\">Redis \u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis \u662f\u4e00\u7a2e\u958b\u6e90\u7684\u9ad8\u6027\u80fd\u9375\u503c\u6578\u64da\u5eab\uff0c\u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u54c8\u5e0c\u3001\u5217\u8868\u3001\u96c6\u5408\u7b49\u3002\u7531\u65bc\u5176\u9ad8\u6548\u7684\u8b80\u5beb\u6027\u80fd\uff0cRedis \u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u8655\u7406\u7b49\u5834\u666f\u3002<\/p>\n<h2 id=\"%e7%a7%92%e6%ae%ba%e6%b4%bb%e5%8b%95%e7%9a%84%e6%8c%91%e6%88%b0-VjogpyIYeP\">\u79d2\u6bba\u6d3b\u52d5\u7684\u6311\u6230<\/h2>\n<p>\u5728\u79d2\u6bba\u6d3b\u52d5\u4e2d\uff0c\u901a\u5e38\u6703\u51fa\u73fe\u5927\u91cf\u7528\u6236\u540c\u6642\u6436\u8cfc\u7684\u60c5\u6cc1\uff0c\u9019\u6703\u5c0e\u81f4\u4ee5\u4e0b\u5e7e\u500b\u554f\u984c\uff1a<\/p>\n<ul>\n<li>\u5eab\u5b58\u6578\u64da\u4e0d\u6e96\u78ba\uff1a\u591a\u500b\u7528\u6236\u540c\u6642\u8acb\u6c42\u6263\u6e1b\u5eab\u5b58\uff0c\u53ef\u80fd\u5c0e\u81f4\u8d85\u8ce3\u3002<\/li>\n<li>\u7cfb\u7d71\u6027\u80fd\u74f6\u9838\uff1a\u9ad8\u4e26\u767c\u8acb\u6c42\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u5eab\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<li>\u7528\u6236\u9ad4\u9a57\u5dee\uff1a\u5ef6\u9072\u7684\u5eab\u5b58\u6263\u6e1b\u6703\u5f71\u97ff\u7528\u6236\u7684\u8cfc\u7269\u9ad4\u9a57\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-redis-%e5%af%a6%e7%8f%be%e9%9b%b6%e5%bb%b6%e6%99%82%e5%ba%ab%e5%ad%98%e6%89%a3%e6%b8%9b-VjogpyIYeP\">\u4f7f\u7528 Redis \u5be6\u73fe\u96f6\u5ef6\u6642\u5eab\u5b58\u6263\u6e1b<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u4e0a\u8ff0\u554f\u984c\uff0c\u53ef\u4ee5\u5229\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u548c\u9ad8\u6548\u7684\u6578\u64da\u7d50\u69cb\u4f86\u5be6\u73fe\u96f6\u5ef6\u6642\u7684\u5eab\u5b58\u6263\u6e1b\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e8%a8%ad%e7%bd%ae%e5%ba%ab%e5%ad%98%e6%95%b8%e6%93%9a-VjogpyIYeP\">1. \u8a2d\u7f6e\u5eab\u5b58\u6578\u64da<\/h3>\n<p>\u9996\u5148\uff0c\u5c07\u5eab\u5b58\u6578\u64da\u5b58\u5132\u5728 Redis \u4e2d\u3002\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u985e\u578b\u4f86\u5b58\u5132\u5eab\u5b58\u6578\u91cf\uff1a<\/p>\n<pre><code>SET product:123:stock 100<\/code><\/pre>\n<h3 id=\"2-%e5%af%a6%e7%8f%be%e5%ba%ab%e5%ad%98%e6%89%a3%e6%b8%9b-VjogpyIYeP\">2. \u5be6\u73fe\u5eab\u5b58\u6263\u6e1b<\/h3>\n<p>\u5728\u7528\u6236\u4e0b\u55ae\u6642\uff0c\u4f7f\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u4f86\u6263\u6e1b\u5eab\u5b58\u3002\u53ef\u4ee5\u4f7f\u7528 <code>DECR<\/code> \u547d\u4ee4\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>DECR product:123:stock<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u6b21\u6263\u6e1b\u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u7684\uff0c\u907f\u514d\u4e86\u8d85\u8ce3\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e5%ba%ab%e5%ad%98-VjogpyIYeP\">3. \u6aa2\u67e5\u5eab\u5b58<\/h3>\n<p>\u5728\u6263\u6e1b\u5eab\u5b58\u4e4b\u524d\uff0c\u61c9\u5148\u6aa2\u67e5\u5eab\u5b58\u662f\u5426\u8db3\u5920\u3002\u53ef\u4ee5\u4f7f\u7528 <code>GET<\/code> \u547d\u4ee4\u4f86\u7372\u53d6\u7576\u524d\u5eab\u5b58\uff1a<\/p>\n<pre><code>GET product:123:stock<\/code><\/pre>\n<p>\u5982\u679c\u5eab\u5b58\u5927\u65bc\u96f6\uff0c\u5247\u57f7\u884c\u6263\u6e1b\u64cd\u4f5c\uff1b\u5426\u5247\uff0c\u8fd4\u56de\u5eab\u5b58\u4e0d\u8db3\u7684\u63d0\u793a\u3002<\/p>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8-lua-%e8%85%b3%e6%9c%ac%e9%80%b2%e8%a1%8c%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-VjogpyIYeP\">4. \u4f7f\u7528 Lua \u8173\u672c\u9032\u884c\u539f\u5b50\u64cd\u4f5c<\/h3>\n<p>\u70ba\u4e86\u9032\u4e00\u6b65\u63d0\u9ad8\u6548\u7387\uff0c\u53ef\u4ee5\u4f7f\u7528 Redis \u7684 Lua \u8173\u672c\u4f86\u5be6\u73fe\u5eab\u5b58\u6aa2\u67e5\u548c\u6263\u6e1b\u7684\u539f\u5b50\u64cd\u4f5c\uff1a<\/p>\n<pre><code>local stock = redis.call('GET', KEYS[1])\nif tonumber(stock) &gt; 0 then\n    return redis.call('DECR', KEYS[1])\nelse\n    return -1\nend<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u5728\u4e00\u500b\u64cd\u4f5c\u4e2d\u5b8c\u6210\u5eab\u5b58\u6aa2\u67e5\u548c\u6263\u6e1b\uff0c\u9032\u4e00\u6b65\u6e1b\u5c11\u5ef6\u9072\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-VjogpyIYeP\">\u7d50\u8ad6<\/h2>\n<p>\u5229\u7528 Redis \u7684\u9ad8\u6548\u6027\u80fd\u548c\u539f\u5b50\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5be6\u73fe\u79d2\u6bba\u6d3b\u52d5\u4e2d\u7684\u96f6\u5ef6\u6642\u5eab\u5b58\u6263\u6e1b\uff0c\u5f9e\u800c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u4e26\u6e1b\u5c11\u8d85\u8ce3\u7684\u98a8\u96aa\u3002\u96a8\u8457\u96fb\u5b50\u5546\u52d9\u7684\u767c\u5c55\uff0c\u9019\u7a2e\u6280\u8853\u5c07\u6210\u70ba\u5546\u5bb6\u5fc5\u5099\u7684\u5de5\u5177\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u79d2\u6bba\u5be6\u73fe\u96f6\u5ef6\u6642\u5eab\u5b58\u6263\u6e1b\uff0c\u63d0\u5347\u8cfc\u7269\u9ad4\u9a57\uff0c\u78ba\u4fdd\u9ad8\u6548\u8655\u7406\u5927\u91cf\u8acb\u6c42\uff0c\u907f\u514d\u5eab\u5b58\u8d85\u8ce3\u554f\u984c\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-126397","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126397","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=126397"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126397\/revisions"}],"predecessor-version":[{"id":126398,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126397\/revisions\/126398"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=126397"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=126397"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=126397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}