{"id":124707,"date":"2024-10-25T16:29:19","date_gmt":"2024-10-25T08:29:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/124707\/"},"modified":"2024-10-25T16:29:20","modified_gmt":"2024-10-25T08:29:20","slug":"redis-%e8%a8%88%e6%95%b8%e5%99%a8%ef%bc%8c%e5%af%a6%e7%8f%be%e7%a7%92%e6%ae%ba%e5%88%86%e9%90%98%e7%a7%92%e6%ae%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/124707\/","title":{"rendered":"Redis \u8a08\u6578\u5668\uff0c\u5be6\u73fe\u79d2\u6bba\u5206\u9418\u79d2\u6bba"},"content":{"rendered":"<h1 id=\"redis-%e8%a8%88%e6%95%b8%e5%99%a8%ef%bc%8c%e5%af%a6%e7%8f%be%e7%a7%92%e6%ae%ba%e5%88%86%e9%90%98%e7%a7%92%e6%ae%ba-dNTPZFYaFF\">Redis \u8a08\u6578\u5668\uff0c\u5be6\u73fe\u79d2\u6bba\u5206\u9418\u79d2\u6bba<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u96fb\u5b50\u5546\u52d9\u74b0\u5883\u4e2d\uff0c\u79d2\u6bba\u6d3b\u52d5\u5df2\u6210\u70ba\u5438\u5f15\u9867\u5ba2\u7684\u91cd\u8981\u624b\u6bb5\u3002\u9019\u985e\u6d3b\u52d5\u901a\u5e38\u6703\u5728\u77ed\u6642\u9593\u5167\u63d0\u4f9b\u9650\u91cf\u5546\u54c1\uff0c\u5438\u5f15\u5927\u91cf\u7528\u6236\u540c\u6642\u6436\u8cfc\u3002\u70ba\u4e86\u6709\u6548\u7ba1\u7406\u9019\u4e9b\u9ad8\u4e26\u767c\u7684\u8acb\u6c42\uff0cRedis \u8a08\u6578\u5668\u6210\u70ba\u4e86\u4e00\u500b\u7406\u60f3\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 Redis \u5be6\u73fe\u79d2\u6bba\u6d3b\u52d5\u7684\u8a08\u6578\u5668\uff0c\u4e26\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u9ad8\u6548\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-redis%ef%bc%9f-dNTPZFYaFF\">\u4ec0\u9ebc\u662f Redis\uff1f<\/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\u548c\u8c50\u5bcc\u7684\u6578\u64da\u7d50\u69cb\uff0cRedis \u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u8a08\u6578\u5668\u3001\u6d88\u606f\u968a\u5217\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-dNTPZFYaFF\">\u79d2\u6bba\u6d3b\u52d5\u7684\u6311\u6230<\/h2>\n<p>\u5728\u79d2\u6bba\u6d3b\u52d5\u4e2d\uff0c\u901a\u5e38\u6703\u9762\u81e8\u4ee5\u4e0b\u5e7e\u500b\u6311\u6230\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u4e26\u767c\u8acb\u6c42\uff1a<\/strong>\u5728\u79d2\u6bba\u958b\u59cb\u7684\u77ac\u9593\uff0c\u6578\u4ee5\u5343\u8a08\u7684\u7528\u6236\u6703\u540c\u6642\u767c\u8d77\u8acb\u6c42\uff0c\u9019\u5c0d\u7cfb\u7d71\u7684\u627f\u8f09\u80fd\u529b\u63d0\u51fa\u4e86\u6975\u9ad8\u7684\u8981\u6c42\u3002<\/li>\n<li><strong>\u6578\u64da\u4e00\u81f4\u6027\uff1a<\/strong>\u5728\u9ad8\u4e26\u767c\u7684\u60c5\u6cc1\u4e0b\uff0c\u5982\u4f55\u78ba\u4fdd\u6bcf\u500b\u7528\u6236\u7372\u5f97\u7684\u5546\u54c1\u6578\u91cf\u6e96\u78ba\u7121\u8aa4\uff0c\u662f\u4e00\u500b\u91cd\u8981\u7684\u554f\u984c\u3002<\/li>\n<li><strong>\u6027\u80fd\u74f6\u9838\uff1a<\/strong>\u5982\u679c\u5f8c\u7aef\u6578\u64da\u5eab\u7121\u6cd5\u627f\u53d7\u5982\u6b64\u9ad8\u7684\u8acb\u6c42\u91cf\uff0c\u5c07\u5c0e\u81f4\u7cfb\u7d71\u5d29\u6f70\u6216\u97ff\u61c9\u7de9\u6162\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-redis-%e5%af%a6%e7%8f%be%e8%a8%88%e6%95%b8%e5%99%a8-dNTPZFYaFF\">\u4f7f\u7528 Redis \u5be6\u73fe\u8a08\u6578\u5668<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u4e0a\u8ff0\u6311\u6230\uff0c\u6211\u5011\u53ef\u4ee5\u5229\u7528 Redis \u7684\u8a08\u6578\u5668\u529f\u80fd\u4f86\u7ba1\u7406\u79d2\u6bba\u5546\u54c1\u7684\u5eab\u5b58\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%88%9d%e5%a7%8b%e5%8c%96%e5%ba%ab%e5%ad%98-dNTPZFYaFF\">1. \u521d\u59cb\u5316\u5eab\u5b58<\/h3>\n<p>\u5728\u79d2\u6bba\u6d3b\u52d5\u958b\u59cb\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u5728 Redis \u4e2d\u521d\u59cb\u5316\u5546\u54c1\u7684\u5eab\u5b58\u6578\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>SET stock:product_id 100<\/code><\/pre>\n<p>\u9019\u88e1\u7684 `product_id` \u662f\u5546\u54c1\u7684\u552f\u4e00\u6a19\u8b58\uff0c`100` \u662f\u5eab\u5b58\u6578\u91cf\u3002<\/p>\n<h3 id=\"2-%e8%99%95%e7%90%86%e8%ab%8b%e6%b1%82-dNTPZFYaFF\">2. \u8655\u7406\u8acb\u6c42<\/h3>\n<p>\u7576\u7528\u6236\u767c\u8d77\u79d2\u6bba\u8acb\u6c42\u6642\uff0c\u6211\u5011\u9700\u8981\u6aa2\u67e5\u5eab\u5b58\u4e26\u9032\u884c\u6263\u6e1b\u3002\u53ef\u4ee5\u4f7f\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff1a<\/p>\n<pre><code>\nif (DECR stock:product_id &gt;= 0) {\n    \/\/ \u6210\u529f\u6263\u6e1b\u5eab\u5b58\uff0c\u8655\u7406\u8a02\u55ae\n} else {\n    \/\/ \u5eab\u5b58\u4e0d\u8db3\uff0c\u8fd4\u56de\u932f\u8aa4\u4fe1\u606f\n}\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u4f7f\u7528 `DECR` \u547d\u4ee4\u4f86\u539f\u5b50\u6027\u5730\u6e1b\u5c11\u5eab\u5b58\uff0c\u4e26\u6aa2\u67e5\u5eab\u5b58\u662f\u5426\u5927\u65bc\u7b49\u65bc\u96f6\u3002<\/p>\n<h3 id=\"3-%e8%a8%88%e6%95%b8%e5%99%a8%e7%9a%84%e5%84%aa%e5%8c%96-dNTPZFYaFF\">3. \u8a08\u6578\u5668\u7684\u512a\u5316<\/h3>\n<p>\u70ba\u4e86\u9032\u4e00\u6b65\u63d0\u9ad8\u6027\u80fd\uff0c\u6211\u5011\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 Redis \u7684 Lua \u8173\u672c\u4f86\u5c01\u88dd\u5eab\u5b58\u6aa2\u67e5\u548c\u6263\u6e1b\u7684\u908f\u8f2f\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u7db2\u7d61\u5ef6\u9072\uff1a<\/p>\n<pre><code>\nlocal stock = redis.call('GET', KEYS[1])\nif stock and tonumber(stock) &gt; 0 then\n    redis.call('DECR', KEYS[1])\n    return 1\nelse\n    return 0\nend\n<\/code><\/pre>\n<p>\u9019\u6bb5 Lua \u8173\u672c\u9996\u5148\u6aa2\u67e5\u5eab\u5b58\uff0c\u7136\u5f8c\u9032\u884c\u6263\u6e1b\uff0c\u78ba\u4fdd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-dNTPZFYaFF\">\u7d50\u8ad6<\/h2>\n<p>\u5229\u7528 Redis \u8a08\u6578\u5668\u4f86\u5be6\u73fe\u79d2\u6bba\u6d3b\u52d5\uff0c\u4e0d\u50c5\u80fd\u5920\u6709\u6548\u7ba1\u7406\u9ad8\u4e26\u767c\u8acb\u6c42\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002\u96a8\u8457\u96fb\u5b50\u5546\u52d9\u7684\u767c\u5c55\uff0c\u79d2\u6bba\u6d3b\u52d5\u5c07\u6703\u8d8a\u4f86\u8d8a\u666e\u904d\uff0c\u638c\u63e1\u9019\u4e00\u6280\u8853\u5c07\u70ba\u4f01\u696d\u5e36\u4f86\u7af6\u722d\u512a\u52e2\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dNTPZFYaFF\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u96fb\u5b50\u5546\u52d9\u4e2d\uff0c\u79d2\u6bba\u6d3b\u52d5\u7684\u6210\u529f\u8207\u5426\u5f80\u5f80\u53d6\u6c7a\u65bc\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u901a\u904e\u4f7f\u7528 Redis \u8a08\u6578\u5668\uff0c\u4f01\u696d\u53ef\u4ee5\u6709\u6548\u61c9\u5c0d\u9ad8\u4e26\u767c\u8acb\u6c42\uff0c\u78ba\u4fdd\u5eab\u5b58\u7ba1\u7406\u7684\u6e96\u78ba\u6027\u3002\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u53ca\u5176\u5728\u9ad8\u4e26\u767c\u5834\u666f\u4e0b\u7684\u61c9\u7528\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u8a08\u6578\u5668\u53ef\u5be6\u73fe\u79d2\u6bba\u6d3b\u52d5\uff0c\u5feb\u901f\u8655\u7406\u9ad8\u4e26\u767c\u8acb\u6c42\uff0c\u78ba\u4fdd\u79d2\u6bba\u5546\u54c1\u7684\u6709\u6548\u7ba1\u7406\u8207\u92b7\u552e\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-124707","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124707","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=124707"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124707\/revisions"}],"predecessor-version":[{"id":124708,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124707\/revisions\/124708"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=124707"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=124707"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=124707"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}