{"id":126891,"date":"2024-10-26T08:30:21","date_gmt":"2024-10-26T00:30:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/126891\/"},"modified":"2024-10-26T08:30:22","modified_gmt":"2024-10-26T00:30:22","slug":"redis-%e7%a2%ba%e4%bf%9d%e9%8e%96%e5%b0%8d%e8%b1%a1%e7%9a%84%e5%ae%89%e5%85%a8%e6%80%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/126891\/","title":{"rendered":"Redis \u78ba\u4fdd\u9396\u5c0d\u8c61\u7684\u5b89\u5168\u6027"},"content":{"rendered":"<h1 id=\"redis-%e7%a2%ba%e4%bf%9d%e9%8e%96%e5%b0%8d%e8%b1%a1%e7%9a%84%e5%ae%89%e5%85%a8%e6%80%a7-vDyJpsbSpa\">Redis \u78ba\u4fdd\u9396\u5c0d\u8c61\u7684\u5b89\u5168\u6027<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b89\u5168\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6a5f\u5236\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u9396\u7684\u4f7f\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 Redis \u4e2d\u5be6\u73fe\u9396\u4ee5\u78ba\u4fdd\u5c0d\u8c61\u7684\u5b89\u5168\u6027\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-redis-%e9%8e%96%ef%bc%9f-vDyJpsbSpa\">\u4ec0\u9ebc\u662f Redis \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\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u6642\uff0c\u9396\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u3002Redis \u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u6709\u6548\u7684\u9396\u5be6\u73fe\u65b9\u5f0f\uff0c\u901a\u5e38\u4f7f\u7528 SETNX \u547d\u4ee4\u4f86\u5275\u5efa\u9396\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-setnx-%e5%91%bd%e4%bb%a4%e5%af%a6%e7%8f%be%e9%8e%96-vDyJpsbSpa\">\u4f7f\u7528 SETNX \u547d\u4ee4\u5be6\u73fe\u9396<\/h2>\n<p>SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u5275\u5efa\u4e00\u500b\u9396\u3002\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u5617\u8a66\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u57f7\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>SETNX lock_key unique_lock_value<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u70ba 1\uff0c\u5247\u8868\u793a\u9396\u6210\u529f\u7372\u53d6\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba 0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u7372\u53d6\u3002<\/p>\n<h3 id=\"%e9%8e%96%e7%9a%84%e9%87%8b%e6%94%be-vDyJpsbSpa\">\u9396\u7684\u91cb\u653e<\/h3>\n<p>\u5728\u4f7f\u7528\u9396\u7684\u904e\u7a0b\u4e2d\uff0c\u91cb\u653e\u9396\u662f\u540c\u6a23\u91cd\u8981\u7684\u3002\u91cb\u653e\u9396\u7684\u904e\u7a0b\u9700\u8981\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u5ba2\u6236\u7aef\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=\"%e4%bd%bf%e7%94%a8%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93%e4%be%86%e9%98%b2%e6%ad%a2%e6%ad%bb%e9%8e%96-vDyJpsbSpa\">\u4f7f\u7528\u904e\u671f\u6642\u9593\u4f86\u9632\u6b62\u6b7b\u9396<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u53ef\u80fd\u6703\u5c0e\u81f4\u6b7b\u9396\u7684\u60c5\u6cc1\u3002\u70ba\u4e86\u9632\u6b62\u9019\u7a2e\u60c5\u6cc1\uff0c\u53ef\u4ee5\u70ba\u9396\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u3002\u9019\u6a23\uff0c\u5373\u4f7f\u5ba2\u6236\u7aef\u5728\u6301\u6709\u9396\u7684\u904e\u7a0b\u4e2d\u5d29\u6f70\uff0c\u9396\u4e5f\u6703\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u81ea\u52d5\u91cb\u653e\u3002<\/p>\n<pre><code>SET lock_key unique_lock_value EX 30 NX<\/code><\/pre>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u5c07\u9396\u8a2d\u7f6e\u70ba 30 \u79d2\u7684\u904e\u671f\u6642\u9593\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u6b7b\u9396\u7684\u767c\u751f\u3002<\/p>\n<h2 id=\"redis-%e5%88%86%e4%bd%88%e5%bc%8f%e9%8e%96%e7%9a%84%e5%af%a6%e7%8f%be-vDyJpsbSpa\">Redis \u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe<\/h2>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u7684\u91cd\u8981\u624b\u6bb5\u3002\u53ef\u4ee5\u4f7f\u7528 Redisson \u7b49\u5eab\u4f86\u7c21\u5316\u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe\u3002Redisson \u63d0\u4f9b\u4e86\u9ad8\u7d1a API\uff0c\u652f\u6301\u9396\u7684\u81ea\u52d5\u91cb\u653e\u548c\u91cd\u5165\u7b49\u529f\u80fd\u3002<\/p>\n<h3 id=\"redisson-%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-vDyJpsbSpa\">Redisson \u7684\u4f7f\u7528\u793a\u4f8b<\/h3>\n<pre><code>RLock lock = redisson.getLock(\"lock_key\");\nlock.lock();\ntry {\n    \/\/ \u57f7\u884c\u9700\u8981\u9396\u5b9a\u7684\u64cd\u4f5c\n} finally {\n    lock.unlock();\n}<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u5be6\u73fe\u4e0d\u50c5\u7c21\u5316\u4e86\u9396\u7684\u7ba1\u7406\uff0c\u9084\u63d0\u9ad8\u4e86\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-vDyJpsbSpa\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li>\u78ba\u4fdd\u9396\u7684\u552f\u4e00\u6027\uff1a\u4f7f\u7528\u552f\u4e00\u7684\u6a19\u8b58\u7b26\u4f86\u6a19\u8b58\u9396\uff0c\u907f\u514d\u4e0d\u540c\u5ba2\u6236\u7aef\u4e4b\u9593\u7684\u9396\u885d\u7a81\u3002<\/li>\n<li>\u8a2d\u7f6e\u5408\u7406\u7684\u904e\u671f\u6642\u9593\uff1a\u6839\u64da\u696d\u52d9\u9700\u6c42\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\uff0c\u9632\u6b62\u6b7b\u9396\u3002<\/li>\n<li>\u4f7f\u7528\u9ad8\u7d1a\u5eab\uff1a\u8003\u616e\u4f7f\u7528 Redisson \u7b49\u5eab\u4f86\u7c21\u5316\u9396\u7684\u7ba1\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-vDyJpsbSpa\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Redis \u4e2d\u5be6\u73fe\u9396\u662f\u78ba\u4fdd\u5c0d\u8c61\u5b89\u5168\u6027\u7684\u91cd\u8981\u624b\u6bb5\u3002\u901a\u904e\u4f7f\u7528 SETNX \u547d\u4ee4\u3001\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u4ee5\u53ca\u5229\u7528\u9ad8\u7d1a\u5eab\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u9396\uff0c\u9632\u6b62\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u6578\u64da\u4e00\u81f4\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u9396\u5be6\u73fe\u65b9\u5f0f\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u78ba\u4fdd\u9396\u5c0d\u8c61\u7684\u5b89\u5168\u6027\uff0c\u900f\u904e\u9ad8\u6548\u7684\u9396\u5b9a\u6a5f\u5236\uff0c\u9632\u6b62\u6578\u64da\u7af6\u722d\u8207\u4e0d\u4e00\u81f4\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u53ef\u9760\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-126891","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126891","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=126891"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126891\/revisions"}],"predecessor-version":[{"id":126892,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126891\/revisions\/126892"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=126891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=126891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=126891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}