{"id":158605,"date":"2024-11-03T03:15:30","date_gmt":"2024-11-02T19:15:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/158605\/"},"modified":"2024-11-03T03:15:31","modified_gmt":"2024-11-02T19:15:31","slug":"%e6%a7%8b%e5%bb%ba%e9%ab%98%e5%8f%af%e7%94%a8%e7%9a%84-redis-%e9%9b%86%e7%be%a4-setnx-%e5%af%a6%e7%8f%be%ef%bc%88redis-%e9%9b%86%e7%be%a4-setnx%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/158605\/","title":{"rendered":"\u69cb\u5efa\u9ad8\u53ef\u7528\u7684 Redis \u96c6\u7fa4 SETNX \u5be6\u73fe\uff08Redis \u96c6\u7fa4 SETNX\uff09"},"content":{"rendered":"<h1 id=\"%e6%a7%8b%e5%bb%ba%e9%ab%98%e5%8f%af%e7%94%a8%e7%9a%84-redis-%e9%9b%86%e7%be%a4-setnx-%e5%af%a6%e7%8f%be%ef%bc%88redis-%e9%9b%86%e7%be%a4-setnx%ef%bc%89-ESpmffqJlM\">\u69cb\u5efa\u9ad8\u53ef\u7528\u7684 Redis \u96c6\u7fa4 SETNX \u5be6\u73fe\uff08Redis \u96c6\u7fa4 SETNX\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u61c9\u7528\u7a0b\u5f0f\u67b6\u69cb\u4e2d\uff0cRedis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u6301\u4e45\u5316\u7b49\u5834\u666f\u3002\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u589e\u9577\uff0c\u55ae\u4e00\u7684 Redis \u5be6\u4f8b\u53ef\u80fd\u7121\u6cd5\u6eff\u8db3\u9ad8\u53ef\u7528\u6027\u548c\u64f4\u5c55\u6027\u7684\u8981\u6c42\uff0c\u56e0\u6b64\u69cb\u5efa Redis \u96c6\u7fa4\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 Redis \u96c6\u7fa4\u4e2d\u5be6\u73fe SETNX \u64cd\u4f5c\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u9ad8\u53ef\u7528\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-setnx%ef%bc%9f-ESpmffqJlM\">\u4ec0\u9ebc\u662f SETNX\uff1f<\/h2>\n<p>SETNX \u662f Redis \u4e2d\u7684\u4e00\u500b\u547d\u4ee4\uff0c\u4ee3\u8868\u201cSET if Not eXists\u201d\u3002\u9019\u500b\u547d\u4ee4\u7684\u4e3b\u8981\u529f\u80fd\u662f\u7576\u6307\u5b9a\u7684\u9375\u4e0d\u5b58\u5728\u6642\uff0c\u5c07\u5176\u8a2d\u7f6e\u70ba\u6307\u5b9a\u7684\u503c\u3002\u9019\u5728\u9700\u8981\u78ba\u4fdd\u67d0\u500b\u8cc7\u6e90\u7684\u552f\u4e00\u6027\u6642\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u5728\u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe\u4e2d\u3002<\/p>\n<h2 id=\"redis-%e9%9b%86%e7%be%a4%e6%9e%b6%e6%a7%8b-ESpmffqJlM\">Redis \u96c6\u7fa4\u67b6\u69cb<\/h2>\n<p>Redis \u96c6\u7fa4\u662f\u4e00\u7a2e\u5206\u4f48\u5f0f\u67b6\u69cb\uff0c\u5141\u8a31\u5c07\u6578\u64da\u5206\u6563\u5230\u591a\u500b Redis \u7bc0\u9ede\u4e0a\u3002\u9019\u6a23\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u53ef\u7528\u6027\uff0c\u9084\u80fd\u5920\u901a\u904e\u6c34\u5e73\u64f4\u5c55\u4f86\u8655\u7406\u66f4\u5927\u7684\u6578\u64da\u91cf\u3002Redis \u96c6\u7fa4\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u81ea\u52d5\u5206\u7247\uff1a\u6578\u64da\u6839\u64da\u54c8\u5e0c\u69fd\u81ea\u52d5\u5206\u914d\u5230\u4e0d\u540c\u7684\u7bc0\u9ede\u3002<\/li>\n<li>\u9ad8\u53ef\u7528\u6027\uff1a\u652f\u6301\u4e3b\u5f9e\u8907\u88fd\u548c\u6545\u969c\u8f49\u79fb\u3002<\/li>\n<li>\u7121\u4e2d\u5fc3\u5316\uff1a\u6bcf\u500b\u7bc0\u9ede\u90fd\u662f\u5e73\u7b49\u7684\uff0c\u6c92\u6709\u55ae\u9ede\u6545\u969c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9c%a8-redis-%e9%9b%86%e7%be%a4%e4%b8%ad%e4%bd%bf%e7%94%a8-setnx-ESpmffqJlM\">\u5728 Redis \u96c6\u7fa4\u4e2d\u4f7f\u7528 SETNX<\/h2>\n<p>\u5728 Redis \u96c6\u7fa4\u4e2d\u4f7f\u7528 SETNX \u547d\u4ee4\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<h3 id=\"1-%e9%8d%b5%e7%9a%84%e5%88%86%e7%89%87-ESpmffqJlM\">1. \u9375\u7684\u5206\u7247<\/h3>\n<p>Redis \u96c6\u7fa4\u4f7f\u7528\u54c8\u5e0c\u69fd\u4f86\u5206\u914d\u9375\u3002\u6bcf\u500b\u9375\u90fd\u6703\u88ab\u6620\u5c04\u5230\u4e00\u500b\u54c8\u5e0c\u69fd\uff0c\u9019\u610f\u5473\u8457\u5728\u4e0d\u540c\u7684\u7bc0\u9ede\u4e0a\u53ef\u80fd\u6703\u6709\u76f8\u540c\u7684\u9375\u3002\u56e0\u6b64\uff0c\u7576\u4f7f\u7528 SETNX \u6642\uff0c\u5fc5\u9808\u78ba\u4fdd\u64cd\u4f5c\u7684\u9375\u5728\u540c\u4e00\u500b\u7bc0\u9ede\u4e0a\u3002<\/p>\n<h3 id=\"2-%e5%88%86%e4%bd%88%e5%bc%8f%e9%8e%96%e7%9a%84%e5%af%a6%e7%8f%be-ESpmffqJlM\">2. \u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe<\/h3>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u4f7f\u7528 SETNX \u53ef\u4ee5\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728 Redis \u96c6\u7fa4\u4e2d\u4f7f\u7528 SETNX \u4f86\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\uff1a<\/p>\n<pre><code>\n# \u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b Redis \u96c6\u7fa4\uff0c\u4e26\u4e14\u5df2\u7d93\u9023\u63a5\u5230\u96c6\u7fa4\nimport redis\n\n# \u9023\u63a5\u5230 Redis \u96c6\u7fa4\ncluster = redis.StrictRedisCluster(startup_nodes=[{\"host\": \"127.0.0.1\", \"port\": \"7000\"}])\n\n# \u5617\u8a66\u7372\u53d6\u9396\nlock_key = \"my_lock\"\nlock_value = \"unique_lock_value\"\n\n# \u4f7f\u7528 SETNX \u5617\u8a66\u7372\u53d6\u9396\nif cluster.setnx(lock_key, lock_value):\n    print(\"\u7372\u53d6\u9396\u6210\u529f\")\n    # \u57f7\u884c\u81e8\u754c\u5340\u4ee3\u78bc\n    # ...\n    \n    # \u91cb\u653e\u9396\n    cluster.delete(lock_key)\nelse:\n    print(\"\u9396\u5df2\u88ab\u4f54\u7528\")\n<\/code><\/pre>\n<h3 id=\"3-%e9%8e%96%e7%9a%84%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93-ESpmffqJlM\">3. \u9396\u7684\u904e\u671f\u6642\u9593<\/h3>\n<p>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0c\u5efa\u8b70\u5728\u7372\u53d6\u9396\u6642\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528 SET \u547d\u4ee4\u7684 NX \u548c EX \u53c3\u6578\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>\n# \u5617\u8a66\u7372\u53d6\u9396\u4e26\u8a2d\u7f6e\u904e\u671f\u6642\u9593\nif cluster.set(lock_key, lock_value, nx=True, ex=10):\n    print(\"\u7372\u53d6\u9396\u6210\u529f\")\n    # \u57f7\u884c\u81e8\u754c\u5340\u4ee3\u78bc\n    # ...\n    \n    # \u9396\u6703\u5728 10 \u79d2\u5f8c\u81ea\u52d5\u91cb\u653e\nelse:\n    print(\"\u9396\u5df2\u88ab\u4f54\u7528\")\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ESpmffqJlM\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Redis \u96c6\u7fa4\u4e2d\u5be6\u73fe SETNX \u64cd\u4f5c\u53ef\u4ee5\u6709\u6548\u5730\u652f\u6301\u9ad8\u53ef\u7528\u6027\u548c\u6578\u64da\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u5206\u4f48\u5f0f\u9396\u7684\u5834\u666f\u4e2d\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\uff0c\u53ef\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u5728\u9ad8\u8ca0\u8f09\u4e0b\u4ecd\u7136\u7a69\u5b9a\u904b\u884c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd Redis \u96c6\u7fa4\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5728 Redis \u96c6\u7fa4\u4e2d\u5be6\u73fe\u9ad8\u53ef\u7528\u7684 SETNX\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u53ef\u9760\u6027\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u7a69\u5b9a\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-158605","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158605","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=158605"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158605\/revisions"}],"predecessor-version":[{"id":158606,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/158605\/revisions\/158606"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=158605"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=158605"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=158605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}