{"id":185218,"date":"2024-11-10T19:43:19","date_gmt":"2024-11-10T11:43:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185218\/"},"modified":"2024-11-10T19:43:20","modified_gmt":"2024-11-10T11:43:20","slug":"%e4%bd%bf%e7%94%a8setnx%e5%af%a6%e7%8f%beredis%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96%ef%bc%88redis%e7%9a%84%e9%8e%96setnx%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185218\/","title":{"rendered":"\u4f7f\u7528Setnx\u5be6\u73feRedis\u7684\u5206\u5e03\u5f0f\u9396\uff08redis\u7684\u9396setnx\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8setnx%e5%af%a6%e7%8f%beredis%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96%ef%bc%88redis%e7%9a%84%e9%8e%96setnx%ef%bc%89-wdFTKZnNdv\">\u4f7f\u7528Setnx\u5be6\u73feRedis\u7684\u5206\u5e03\u5f0f\u9396\uff08redis\u7684\u9396setnx\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u5e03\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u8cc7\u6e90\u7684\u7af6\u722d\u548c\u5354\u8abf\u662f\u4e00\u500b\u91cd\u8981\u7684\u6311\u6230\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u5206\u5e03\u5f0f\u9396\u7684\u6982\u5ff5\u61c9\u904b\u800c\u751f\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u5206\u5e03\u5f0f\u9396\uff0c\u5176\u4e2dSetnx\u547d\u4ee4\u662f\u5176\u6838\u5fc3\u4e4b\u4e00\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsetnx%ef%bc%9f-wdFTKZnNdv\">\u4ec0\u9ebc\u662fSetnx\uff1f<\/h2>\n<p>Setnx\u662fRedis\u4e2d\u7684\u4e00\u500b\u547d\u4ee4\uff0c\u5168\u540d\u70ba\u201cSET if Not eXists\u201d\u3002\u5b83\u7684\u529f\u80fd\u662f\u5c07\u4e00\u500b\u9375\u8a2d\u7f6e\u70ba\u6307\u5b9a\u7684\u503c\uff0c\u53ea\u6709\u7576\u8a72\u9375\u4e0d\u5b58\u5728\u6642\u624d\u6703\u6210\u529f\u3002\u9019\u4e00\u7279\u6027\u4f7f\u5f97Setnx\u975e\u5e38\u9069\u5408\u7528\u65bc\u5be6\u73fe\u5206\u5e03\u5f0f\u9396\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u5be6\u4f8b\u80fd\u5920\u7372\u5f97\u9396\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96%ef%bc%9f-wdFTKZnNdv\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5206\u5e03\u5f0f\u9396\uff1f<\/h2>\n<p>\u5728\u5206\u5e03\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u7576\u591a\u500b\u5be6\u4f8b\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u7af6\u722d\u689d\u4ef6\u3002\u5206\u5e03\u5f0f\u9396\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u7684\u8a2a\u554f\uff0c\u78ba\u4fdd\u5728\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u5be6\u4f8b\u80fd\u5920\u57f7\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002\u9019\u5c0d\u65bc\u9700\u8981\u4fdd\u8b49\u6578\u64da\u4e00\u81f4\u6027\u7684\u5834\u666f\u5c24\u70ba\u91cd\u8981\uff0c\u4f8b\u5982\u5728\u8655\u7406\u652f\u4ed8\u3001\u8a02\u55ae\u7b49\u64cd\u4f5c\u6642\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8setnx%e5%af%a6%e7%8f%beredis%e7%9a%84%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96-wdFTKZnNdv\">\u5982\u4f55\u4f7f\u7528Setnx\u5be6\u73feRedis\u7684\u5206\u5e03\u5f0f\u9396<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528Setnx\u547d\u4ee4\u5be6\u73feRedis\u5206\u5e03\u5f0f\u9396\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li>\u5617\u8a66\u7372\u53d6\u9396\uff1a\u4f7f\u7528Setnx\u547d\u4ee4\u8a2d\u7f6e\u4e00\u500b\u9396\u9375\uff0c\u4e26\u6307\u5b9a\u4e00\u500b\u904e\u671f\u6642\u9593\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u3002<\/li>\n<li>\u6aa2\u67e5\u9396\u7684\u72c0\u614b\uff1a\u5982\u679cSetnx\u8fd4\u56de1\uff0c\u5247\u8868\u793a\u6210\u529f\u7372\u53d6\u9396\uff1b\u5982\u679c\u8fd4\u56de0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5be6\u4f8b\u7372\u53d6\u3002<\/li>\n<li>\u57f7\u884c\u81e8\u754c\u5340\u4ee3\u78bc\uff1a\u5728\u7372\u53d6\u9396\u5f8c\uff0c\u57f7\u884c\u9700\u8981\u4fdd\u8b77\u7684\u4ee3\u78bc\u3002<\/li>\n<li>\u91cb\u653e\u9396\uff1a\u57f7\u884c\u5b8c\u81e8\u754c\u5340\u4ee3\u78bc\u5f8c\uff0c\u522a\u9664\u9396\u9375\u4ee5\u91cb\u653e\u9396\u3002<\/li>\n<\/ol>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-wdFTKZnNdv\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<pre><code>\nimport redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n# \u9396\u7684\u9375\nlock_key = \"my_lock\"\n# \u9396\u7684\u904e\u671f\u6642\u9593\uff08\u79d2\uff09\nlock_expire_time = 5\n\ndef acquire_lock():\n    # \u5617\u8a66\u7372\u53d6\u9396\n    if r.set(lock_key, \"locked\", nx=True, ex=lock_expire_time):\n        return True\n    return False\n\ndef release_lock():\n    # \u91cb\u653e\u9396\n    r.delete(lock_key)\n\n# \u4f7f\u7528\u9396\nif acquire_lock():\n    try:\n        # \u57f7\u884c\u81e8\u754c\u5340\u4ee3\u78bc\n        print(\"\u7372\u53d6\u9396\uff0c\u57f7\u884c\u64cd\u4f5c...\")\n        time.sleep(10)  # \u6a21\u64ec\u9577\u6642\u9593\u64cd\u4f5c\n    finally:\n        release_lock()\n        print(\"\u91cb\u653e\u9396\")\nelse:\n    print(\"\u9396\u5df2\u88ab\u5176\u4ed6\u5be6\u4f8b\u7372\u53d6\")\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-wdFTKZnNdv\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528Redis\u7684\u5206\u5e03\u5f0f\u9396\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\uff1a<\/p>\n<ul>\n<li><strong>\u9396\u7684\u904e\u671f\u6642\u9593\uff1a<\/strong>\u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u3002\u5982\u679c\u64cd\u4f5c\u6642\u9593\u8d85\u904e\u4e86\u904e\u671f\u6642\u9593\uff0c\u9396\u6703\u81ea\u52d5\u91cb\u653e\uff0c\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<li><strong>\u9396\u7684\u91cb\u653e\uff1a<\/strong>\u78ba\u4fdd\u5728\u64cd\u4f5c\u5b8c\u6210\u5f8c\u91cb\u653e\u9396\uff0c\u907f\u514d\u9396\u9577\u6642\u9593\u4f54\u7528\u3002<\/li>\n<li><strong>\u932f\u8aa4\u8655\u7406\uff1a<\/strong>\u5728\u7372\u53d6\u9396\u6216\u57f7\u884c\u64cd\u4f5c\u6642\uff0c\u61c9\u8003\u616e\u5230\u53ef\u80fd\u7684\u7570\u5e38\u60c5\u6cc1\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u932f\u8aa4\u8655\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wdFTKZnNdv\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Setnx\u547d\u4ee4\u5be6\u73feRedis\u7684\u5206\u5e03\u5f0f\u9396\u662f\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5728\u5206\u5e03\u5f0f\u7cfb\u7d71\u4e2d\u7ba1\u7406\u8cc7\u6e90\u7684\u7af6\u722d\u3002\u901a\u904e\u5408\u7406\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u548c\u91cb\u653e\u6a5f\u5236\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u6578\u64da\u4e00\u81f4\u6027\u7684\u61c9\u7528\u5834\u666f\uff0cRedis\u7684\u5206\u5e03\u5f0f\u9396\u63d0\u4f9b\u4e86\u4e00\u500b\u53ef\u9760\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4f7f\u7528Setnx\u5be6\u73feRedis\u7684\u5206\u5e03\u5f0f\u9396\uff0c\u78ba\u4fdd\u591a\u500b\u9032\u7a0b\u5b89\u5168\u5730\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\uff0c\u63d0\u5347\u7cfb\u7d71\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-185218","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185218","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=185218"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185218\/revisions"}],"predecessor-version":[{"id":185219,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185218\/revisions\/185219"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}