{"id":128367,"date":"2024-10-26T13:38:18","date_gmt":"2024-10-26T05:38:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/128367\/"},"modified":"2024-10-26T13:38:19","modified_gmt":"2024-10-26T05:38:19","slug":"redis-%e5%af%a6%e7%8f%be%e7%9a%84%e9%8e%96%e8%b6%85%e6%99%82%e4%b8%80%e6%ac%a1%e6%80%a7%e8%a7%a3%e6%b1%ba%e6%a5%ad%e5%8b%99%e5%95%8f%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/128367\/","title":{"rendered":"Redis \u5be6\u73fe\u7684\u9396\u8d85\u6642\u4e00\u6b21\u6027\u89e3\u6c7a\u696d\u52d9\u554f\u984c"},"content":{"rendered":"<h1 id=\"redis-%e5%af%a6%e7%8f%be%e7%9a%84%e9%8e%96%e8%b6%85%e6%99%82%e4%b8%80%e6%ac%a1%e6%80%a7%e8%a7%a3%e6%b1%ba%e6%a5%ad%e5%8b%99%e5%95%8f%e9%a1%8c-LmZYgGSoFm\">Redis \u5be6\u73fe\u7684\u9396\u8d85\u6642\u4e00\u6b21\u6027\u89e3\u6c7a\u696d\u52d9\u554f\u984c<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u7ba1\u7406\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\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u9396\u7684\u6a5f\u5236\uff0c\u5176\u4e2d\u9396\u7684\u8d85\u6642\u8a2d\u7f6e\u662f\u4e00\u500b\u95dc\u9375\u7684\u7279\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528 Redis \u5be6\u73fe\u9396\u8d85\u6642\u4f86\u89e3\u6c7a\u696d\u52d9\u554f\u984c\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e9%8e%96%e8%b6%85%e6%99%82-LmZYgGSoFm\">\u70ba\u4ec0\u9ebc\u9700\u8981\u9396\u8d85\u6642<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u74b0\u5883\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u53ef\u4ee5\u9632\u6b62\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u7684\u554f\u984c\u3002\u7136\u800c\uff0c\u82e5\u9396\u672a\u80fd\u6b63\u78ba\u91cb\u653e\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6b7b\u9396\u6216\u8cc7\u6e90\u9577\u6642\u9593\u88ab\u4f54\u7528\u3002\u9019\u6642\uff0c\u9396\u8d85\u6642\u7684\u6a5f\u5236\u5c31\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u901a\u904e\u8a2d\u7f6e\u9396\u7684\u8d85\u6642\u6642\u9593\uff0c\u53ef\u4ee5\u78ba\u4fdd\u5373\u4f7f\u5728\u7570\u5e38\u60c5\u6cc1\u4e0b\uff0c\u9396\u4e5f\u80fd\u81ea\u52d5\u91cb\u653e\uff0c\u5f9e\u800c\u907f\u514d\u7cfb\u7d71\u7684\u9577\u6642\u9593\u963b\u585e\u3002<\/p>\n<h2 id=\"redis-%e9%8e%96%e7%9a%84%e5%af%a6%e7%8f%be-LmZYgGSoFm\">Redis \u9396\u7684\u5be6\u73fe<\/h2>\n<p>Redis \u63d0\u4f9b\u4e86\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u9396\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Redis \u5be6\u73fe\u9396\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li>\u4f7f\u7528 <code>SETNX<\/code> \u547d\u4ee4\u4f86\u5617\u8a66\u7372\u53d6\u9396\u3002<\/li>\n<li>\u5982\u679c\u7372\u53d6\u6210\u529f\uff0c\u5247\u8a2d\u7f6e\u9396\u7684\u8d85\u6642\u6642\u9593\u3002<\/li>\n<li>\u5728\u696d\u52d9\u908f\u8f2f\u57f7\u884c\u5b8c\u6210\u5f8c\uff0c\u91cb\u653e\u9396\u3002<\/li>\n<li>\u5982\u679c\u7372\u53d6\u5931\u6557\uff0c\u5247\u6839\u64da\u9700\u8981\u91cd\u8a66\u6216\u8fd4\u56de\u932f\u8aa4\u3002<\/li>\n<\/ol>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-LmZYgGSoFm\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<pre><code>\nimport redis\nimport time\n\n# \u9023\u63a5\u5230 Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\ndef acquire_lock(lock_name, acquire_time=10, lock_time=10):\n    identifier = str(uuid.uuid4())\n    end = time.time() + acquire_time\n    while time.time() &lt; end:\n        if r.set(lock_name, identifier, nx=True, ex=lock_time):\n            return identifier\n        time.sleep(0.001)  # \u7b49\u5f85\u4e00\u6bb5\u6642\u9593\u518d\u91cd\u8a66\n    return False\n\ndef release_lock(lock_name, identifier):\n    pipe = r.pipeline(True)\n    while True:\n        try:\n            pipe.watch(lock_name)\n            if pipe.get(lock_name) == identifier:\n                pipe.multi()\n                pipe.delete(lock_name)\n                pipe.execute()\n                return True\n            pipe.unwatch()\n            break\n        except redis.WatchError:\n            pass\n    return False\n\n# \u4f7f\u7528\u9396\nlock_name = \"my_lock\"\nidentifier = acquire_lock(lock_name)\nif identifier:\n    try:\n        # \u57f7\u884c\u696d\u52d9\u908f\u8f2f\n        print(\"\u7372\u53d6\u9396\u6210\u529f\uff0c\u57f7\u884c\u696d\u52d9\u908f\u8f2f\")\n    finally:\n        release_lock(lock_name, identifier)\nelse:\n    print(\"\u7372\u53d6\u9396\u5931\u6557\")\n<\/code><\/pre>\n<h2 id=\"%e9%8e%96%e8%b6%85%e6%99%82%e7%9a%84%e5%84%aa%e5%8b%a2-LmZYgGSoFm\">\u9396\u8d85\u6642\u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528 Redis \u5be6\u73fe\u7684\u9396\u8d85\u6642\u6a5f\u5236\u6709\u4ee5\u4e0b\u5e7e\u500b\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u81ea\u52d5\u91cb\u653e\uff1a<\/strong>\u5373\u4f7f\u5728\u7570\u5e38\u60c5\u6cc1\u4e0b\uff0c\u9396\u4e5f\u80fd\u81ea\u52d5\u91cb\u653e\uff0c\u907f\u514d\u6b7b\u9396\u3002<\/li>\n<li><strong>\u7c21\u55ae\u6613\u7528\uff1a<\/strong>Redis \u7684 API \u7c21\u55ae\u660e\u77ad\uff0c\u6613\u65bc\u96c6\u6210\u5230\u73fe\u6709\u7cfb\u7d71\u4e2d\u3002<\/li>\n<li><strong>\u9ad8\u6548\u6027\u80fd\uff1a<\/strong>Redis \u7684\u9ad8\u6027\u80fd\u7279\u6027\u4f7f\u5f97\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u64cd\u4f5c\u975e\u5e38\u8fc5\u901f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-LmZYgGSoFm\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528 Redis \u5be6\u73fe\u9396\u8d85\u6642\uff0c\u53ef\u4ee5\u6709\u6548\u89e3\u6c7a\u696d\u52d9\u4e2d\u7684\u7af6\u722d\u689d\u4ef6\u548c\u6b7b\u9396\u554f\u984c\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u6027\u80fd\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u9396\u5be6\u73fe\u65b9\u5f0f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u9396\u8d85\u6642\uff0c\u89e3\u6c7a\u696d\u52d9\u554f\u984c\uff0c\u63d0\u5347\u7cfb\u7d71\u6548\u7387\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-128367","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128367","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=128367"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128367\/revisions"}],"predecessor-version":[{"id":128368,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128367\/revisions\/128368"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=128367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=128367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=128367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}