{"id":126887,"date":"2024-10-26T08:28:18","date_gmt":"2024-10-26T00:28:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/126887\/"},"modified":"2024-10-26T08:28:19","modified_gmt":"2024-10-26T00:28:19","slug":"redis-%e7%a2%ba%e4%bf%9d%e5%ba%ab%e5%ad%98%e4%b8%8d%e7%82%ba%e8%b2%a0%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/126887\/","title":{"rendered":"Redis \u78ba\u4fdd\u5eab\u5b58\u4e0d\u70ba\u8ca0\u6578"},"content":{"rendered":"<h1 id=\"redis-%e7%a2%ba%e4%bf%9d%e5%ba%ab%e5%ad%98%e4%b8%8d%e7%82%ba%e8%b2%a0%e6%95%b8-aGzvFNvOby\">Redis \u78ba\u4fdd\u5eab\u5b58\u4e0d\u70ba\u8ca0\u6578<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u96fb\u5b50\u5546\u52d9\u548c\u5eab\u5b58\u7ba1\u7406\u4e2d\uff0c\u78ba\u4fdd\u5eab\u5b58\u6578\u91cf\u7684\u6e96\u78ba\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7576\u5eab\u5b58\u6578\u91cf\u51fa\u73fe\u8ca0\u6578\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5ba2\u6236\u8a02\u55ae\u7684\u932f\u8aa4\u3001\u8ca1\u52d9\u640d\u5931\u4ee5\u53ca\u54c1\u724c\u4fe1\u8b7d\u7684\u640d\u5bb3\u3002Redis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u7d50\u69cb\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u78ba\u4fdd\u5eab\u5b58\u4e0d\u6703\u51fa\u73fe\u8ca0\u6578\u7684\u60c5\u6cc1\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 Redis \u4f86\u7ba1\u7406\u5eab\u5b58\uff0c\u4e26\u78ba\u4fdd\u5eab\u5b58\u6578\u91cf\u7684\u6b63\u78ba\u6027\u3002<\/p>\n<h2 id=\"redis-%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-aGzvFNvOby\">Redis \u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Redis \u662f\u4e00\u7a2e\u958b\u6e90\u7684\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\u6027\u80fd\u548c\u9748\u6d3b\u7684\u6578\u64da\u7d50\u69cb\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\u5728\u5eab\u5b58\u7ba1\u7406\u4e2d\uff0cRedis \u53ef\u4ee5\u7528\u4f86\u5feb\u901f\u67e5\u8a62\u548c\u66f4\u65b0\u5eab\u5b58\u6578\u91cf\u3002<\/p>\n<h2 id=\"%e5%ba%ab%e5%ad%98%e7%ae%a1%e7%90%86%e7%9a%84%e6%8c%91%e6%88%b0-aGzvFNvOby\">\u5eab\u5b58\u7ba1\u7406\u7684\u6311\u6230<\/h2>\n<p>\u5728\u5eab\u5b58\u7ba1\u7406\u4e2d\uff0c\u6700\u5e38\u898b\u7684\u6311\u6230\u4e4b\u4e00\u662f\u5982\u4f55\u9632\u6b62\u5eab\u5b58\u6578\u91cf\u8b8a\u70ba\u8ca0\u6578\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u591a\u500b\u7528\u6236\u540c\u6642\u4e0b\u55ae\uff0c\u5c0e\u81f4\u5eab\u5b58\u8d85\u8ce3\u3002<\/li>\n<li>\u7cfb\u7d71\u6545\u969c\u6216\u6578\u64da\u4e0d\u4e00\u81f4\uff0c\u5c0e\u81f4\u5eab\u5b58\u6578\u91cf\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-redis-%e7%a2%ba%e4%bf%9d%e5%ba%ab%e5%ad%98%e4%b8%8d%e7%82%ba%e8%b2%a0%e6%95%b8-aGzvFNvOby\">\u4f7f\u7528 Redis \u78ba\u4fdd\u5eab\u5b58\u4e0d\u70ba\u8ca0\u6578<\/h2>\n<p>\u70ba\u4e86\u9632\u6b62\u5eab\u5b58\u6578\u91cf\u8b8a\u70ba\u8ca0\u6578\uff0c\u53ef\u4ee5\u4f7f\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-redis-%e7%9a%84%e5%8e%9f%e5%ad%90%e8%87%aa%e5%a2%9e%e6%93%8d%e4%bd%9c-aGzvFNvOby\">1. \u4f7f\u7528 Redis \u7684\u539f\u5b50\u81ea\u589e\u64cd\u4f5c<\/h3>\n<p>Redis \u63d0\u4f9b\u4e86\u539f\u5b50\u81ea\u589e\u64cd\u4f5c\uff0c\u53ef\u4ee5\u78ba\u4fdd\u5728\u591a\u500b\u8acb\u6c42\u540c\u6642\u9032\u884c\u6642\uff0c\u5eab\u5b58\u6578\u91cf\u7684\u66f4\u65b0\u662f\u5b89\u5168\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code> \n\/\/ \u5047\u8a2d\u5eab\u5b58\u7684\u9375\u70ba \"product:stock:1\"\nWATCH product:stock:1\nstock = GET product:stock:1\nif stock &gt; 0:\n    DECR product:stock:1\n    \/\/ \u8655\u7406\u8a02\u55ae\nUNWATCH\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u4f7f\u7528\u4e86 WATCH \u547d\u4ee4\u4f86\u76e3\u8996\u5eab\u5b58\u7684\u9375\uff0c\u7136\u5f8c\u6aa2\u67e5\u5eab\u5b58\u662f\u5426\u5927\u65bc\u96f6\u3002\u5982\u679c\u662f\uff0c\u5247\u4f7f\u7528 DECR \u547d\u4ee4\u6e1b\u5c11\u5eab\u5b58\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u591a\u500b\u8acb\u6c42\u540c\u6642\u9032\u884c\u6642\uff0c\u5eab\u5b58\u4e0d\u6703\u8b8a\u70ba\u8ca0\u6578\u3002<\/p>\n<h3 id=\"2-%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-aGzvFNvOby\">2. \u4f7f\u7528 Lua \u8173\u672c\u9032\u884c\u539f\u5b50\u64cd\u4f5c<\/h3>\n<p>Redis \u9084\u652f\u6301 Lua \u8173\u672c\uff0c\u53ef\u4ee5\u5c07\u591a\u500b\u64cd\u4f5c\u6253\u5305\u6210\u4e00\u500b\u539f\u5b50\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 Lua \u8173\u672c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nlocal stock = redis.call('GET', KEYS[1])\nif tonumber(stock) &gt; 0 then\n    redis.call('DECR', KEYS[1])\n    return 1\nelse\n    return 0\nend\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u9996\u5148\u7372\u53d6\u5eab\u5b58\u6578\u91cf\uff0c\u7136\u5f8c\u6aa2\u67e5\u662f\u5426\u5927\u65bc\u96f6\u3002\u5982\u679c\u662f\uff0c\u5247\u6e1b\u5c11\u5eab\u5b58\u4e26\u8fd4\u56de\u6210\u529f\u6a19\u8a8c\uff1b\u5426\u5247\u8fd4\u56de\u5931\u6557\u6a19\u8a8c\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5eab\u5b58\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-aGzvFNvOby\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u5eab\u5b58\u7ba1\u7406\u4e2d\uff0c\u78ba\u4fdd\u5eab\u5b58\u4e0d\u70ba\u8ca0\u6578\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5229\u7528 Redis \u7684\u539f\u5b50\u64cd\u4f5c\u548c Lua \u8173\u672c\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u9632\u6b62\u5eab\u5b58\u8d85\u8ce3\u7684\u60c5\u6cc1\u767c\u751f\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u5ba2\u6236\u6eff\u610f\u5ea6\uff0c\u9084\u80fd\u4fdd\u8b77\u4f01\u696d\u7684\u8ca1\u52d9\u5229\u76ca\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u78ba\u4fdd\u5eab\u5b58\u4e0d\u70ba\u8ca0\u6578\uff0c\u900f\u904e\u539f\u5b50\u64cd\u4f5c\u548c\u4e8b\u52d9\u7ba1\u7406\uff0c\u5be6\u73fe\u9ad8\u6548\u7684\u5eab\u5b58\u63a7\u5236\u8207\u6578\u64da\u4e00\u81f4\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-126887","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126887","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=126887"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126887\/revisions"}],"predecessor-version":[{"id":126888,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126887\/revisions\/126888"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=126887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=126887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=126887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}