{"id":167677,"date":"2024-11-06T04:00:29","date_gmt":"2024-11-05T20:00:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167677\/"},"modified":"2024-11-06T04:00:30","modified_gmt":"2024-11-05T20:00:30","slug":"%e5%88%a9%e7%94%a8redis%e5%af%a6%e7%8f%be%e7%b0%a1%e5%96%ae%e7%9a%84%e9%8e%96%e5%ae%9a%e5%8a%9f%e8%83%bd%ef%bc%88redis%e9%8e%96%e8%a8%ad%e7%bd%ae%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167677\/","title":{"rendered":"\u5229\u7528Redis\u5be6\u73fe\u7c21\u55ae\u7684\u9396\u5b9a\u529f\u80fd\uff08redis\u9396\u8a2d\u7f6e\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8redis%e5%af%a6%e7%8f%be%e7%b0%a1%e5%96%ae%e7%9a%84%e9%8e%96%e5%ae%9a%e5%8a%9f%e8%83%bd%ef%bc%88redis%e9%8e%96%e8%a8%ad%e7%bd%ae%ef%bc%89-fENpFMPIAy\">\u5229\u7528Redis\u5be6\u73fe\u7c21\u55ae\u7684\u9396\u5b9a\u529f\u80fd\uff08redis\u9396\u8a2d\u7f6e\uff09<\/h1>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u5b9a\u6a5f\u5236\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u9632\u6b62\u7af6\u722d\u689d\u4ef6\u7684\u91cd\u8981\u624b\u6bb5\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u6709\u6548\u7684\u9396\u5b9a\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u7c21\u55ae\u7684\u9396\u5b9a\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e9%8e%96%ef%bc%9f-fENpFMPIAy\">\u4ec0\u9ebc\u662fRedis\u9396\uff1f<\/h2>\n<p>Redis\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u8a2a\u554f\u7684\u6a5f\u5236\u3002\u7576\u4e00\u500b\u9032\u7a0b\u7372\u5f97\u9396\u6642\uff0c\u5176\u4ed6\u9032\u7a0b\u5fc5\u9808\u7b49\u5f85\uff0c\u76f4\u5230\u9396\u88ab\u91cb\u653e\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u591a\u500b\u9032\u7a0b\u540c\u6642\u4fee\u6539\u540c\u4e00\u8cc7\u6e90\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%8e%9f%e7%90%86-fENpFMPIAy\">Redis\u9396\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>Redis\u9396\u7684\u57fa\u672c\u539f\u7406\u662f\u4f7f\u7528Redis\u7684SETNX\u547d\u4ee4\u3002SETNX\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSET if Not eXists\u201d\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u624d\u8a2d\u7f6e\u9375\u7684\u503c\u3002\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u5229\u7528\u5b83\u4f86\u5be6\u73fe\u9396\u5b9a\u529f\u80fd\u3002<\/p>\n<h3 id=\"%e9%8e%96%e7%9a%84%e8%a8%ad%e7%bd%ae-fENpFMPIAy\">\u9396\u7684\u8a2d\u7f6e<\/h3>\n<p>\u7576\u4e00\u500b\u9032\u7a0b\u9700\u8981\u7372\u53d6\u9396\u6642\uff0c\u5b83\u53ef\u4ee5\u57f7\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre><code>SETNX lock_key unique_lock_value<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u70ba1\uff0c\u5247\u8868\u793a\u9396\u7372\u53d6\u6210\u529f\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u3002<\/p>\n<h3 id=\"%e9%8e%96%e7%9a%84%e9%87%8b%e6%94%be-fENpFMPIAy\">\u9396\u7684\u91cb\u653e<\/h3>\n<p>\u91cb\u653e\u9396\u7684\u6642\u5019\uff0c\u6211\u5011\u9700\u8981\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u5b83\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u9396\u7684\u503c\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>if (get(lock_key) == unique_lock_value) {\n    DEL lock_key;\n}<\/code><\/pre>\n<h2 id=\"%e5%af%a6%e7%8f%be%e4%b8%80%e5%80%8b%e7%b0%a1%e5%96%ae%e7%9a%84redis%e9%8e%96-fENpFMPIAy\">\u5be6\u73fe\u4e00\u500b\u7c21\u55ae\u7684Redis\u9396<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Python\u548cRedis\u5be6\u73fe\u7c21\u55ae\u9396\u5b9a\u529f\u80fd\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\ndef acquire_lock(lock_name, lock_value, timeout=10):\n    # \u8a2d\u7f6e\u9396\n    if r.setnx(lock_name, lock_value):\n        # \u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\n        r.expire(lock_name, timeout)\n        return True\n    return False\n\ndef release_lock(lock_name, lock_value):\n    # \u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u9396\n    if r.get(lock_name) == lock_value:\n        r.delete(lock_name)\n\n# \u4f7f\u7528\u793a\u4f8b\nlock_name = \"my_lock\"\nlock_value = \"unique_value\"\n\nif acquire_lock(lock_name, lock_value):\n    try:\n        # \u57f7\u884c\u9700\u8981\u9396\u5b9a\u7684\u64cd\u4f5c\n        print(\"\u7372\u53d6\u9396\u6210\u529f\uff0c\u57f7\u884c\u64cd\u4f5c...\")\n        time.sleep(5)  # \u6a21\u64ec\u64cd\u4f5c\n    finally:\n        release_lock(lock_name, lock_value)\n        print(\"\u9396\u5df2\u91cb\u653e\")\nelse:\n    print(\"\u7372\u53d6\u9396\u5931\u6557\")<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-fENpFMPIAy\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u9396\u7684\u904e\u671f\u6642\u9593\uff1a<\/strong>\u5728\u8a2d\u7f6e\u9396\u6642\uff0c\u61c9\u8a72\u8a2d\u7f6e\u4e00\u500b\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\uff1a<\/strong>\u9396\u7684\u503c\u61c9\u8a72\u662f\u552f\u4e00\u7684\uff0c\u4ee5\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u8a72\u9396\u7684\u9032\u7a0b\u80fd\u5920\u91cb\u653e\u5b83\u3002<\/li>\n<li><strong>\u932f\u8aa4\u8655\u7406\uff1a<\/strong>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u61c9\u8a72\u8003\u616e\u5230\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-fENpFMPIAy\">\u7e3d\u7d50<\/h2>\n<p>\u5229\u7528Redis\u5be6\u73fe\u9396\u5b9a\u529f\u80fd\u662f\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\u7ba1\u7406\u8cc7\u6e90\u7684\u8a2a\u554f\u3002\u901a\u904e\u4f7f\u7528SETNX\u547d\u4ee4\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u7372\u53d6\u548c\u91cb\u653e\u9396\uff0c\u5f9e\u800c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u6027\u80fd\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\u3002\u4e86\u89e3\u5982\u4f55\u5728Redis\u4e2d\u5be6\u73fe\u9396\u5b9a\u529f\u80fd\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u7c21\u55ae\u7684\u9396\u5b9a\u529f\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u9632\u6b62\u7af6\u722d\u689d\u4ef6\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\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-167677","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167677","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=167677"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167677\/revisions"}],"predecessor-version":[{"id":167678,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167677\/revisions\/167678"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=167677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=167677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=167677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}