{"id":197494,"date":"2024-11-14T08:25:19","date_gmt":"2024-11-14T00:25:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/197494\/"},"modified":"2024-11-14T08:25:20","modified_gmt":"2024-11-14T00:25:20","slug":"%e5%88%a9%e7%94%a8redis%e9%9d%88%e6%b4%bb%e6%8e%8c%e6%8f%a1%e4%b8%89%e7%a8%ae%e9%8e%96%e6%a9%9f%e5%88%b6%ef%bc%88redis%e7%9a%84%e4%b8%89%e7%a8%ae%e9%8e%96%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/197494\/","title":{"rendered":"\u5229\u7528Redis\u9748\u6d3b\u638c\u63e1\u4e09\u7a2e\u9396\u6a5f\u5236\uff08redis\u7684\u4e09\u7a2e\u9396\uff09"},"content":{"rendered":"

\u5229\u7528Redis\u9748\u6d3b\u638c\u63e1\u4e09\u7a2e\u9396\u6a5f\u5236\uff08Redis\u7684\u4e09\u7a2e\u9396\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u6a5f\u5236\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u9632\u6b62\u7af6\u722d\u689d\u4ef6\u7684\u91cd\u8981\u5de5\u5177\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u6a5f\u5236\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u7ba1\u7406\u4e26\u767c\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eRedis\u7684\u4e09\u7a2e\u9396\u6a5f\u5236\uff1a\u7c21\u55ae\u9396\u3001\u7d05\u8272\u9396\u548c\u53ef\u91cd\u5165\u9396\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

1. \u7c21\u55ae\u9396<\/h2>\n

\u7c21\u55ae\u9396\u662f\u6700\u57fa\u672c\u7684\u9396\u6a5f\u5236\uff0c\u901a\u5e38\u4f7f\u7528Redis\u7684SETNX\u547d\u4ee4\u4f86\u5be6\u73fe\u3002SETNX\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSET if Not eXists\u201d\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u7576\u9375\u4e0d\u5b58\u5728\u6642\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u4e26\u8fd4\u56de1\uff1b\u5982\u679c\u9375\u5df2\u5b58\u5728\uff0c\u5247\u8fd4\u56de0\u3002\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u4e00\u500b\u7c21\u55ae\u7684\u9396\u3002<\/p>\n

function acquireLock($lockName, $expire) {\n    $result = redis()->setnx($lockName, time() + $expire);\n    if ($result) {\n        return true; \/\/ \u9396\u7372\u53d6\u6210\u529f\n    }\n    $lockTime = redis()->get($lockName);\n    if (time() > $lockTime) {\n        \/\/ \u5617\u8a66\u91cd\u7f6e\u9396\n        $oldLockTime = redis()->getset($lockName, time() + $expire);\n        if ($oldLockTime == $lockTime) {\n            return true; \/\/ \u9396\u7372\u53d6\u6210\u529f\n        }\n    }\n    return false; \/\/ \u9396\u7372\u53d6\u5931\u6557\n}\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5617\u8a66\u7372\u53d6\u9396\u3002\u5982\u679c\u9396\u5df2\u7d93\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\uff0c\u6211\u5011\u6703\u6aa2\u67e5\u9396\u7684\u904e\u671f\u6642\u9593\uff0c\u4e26\u6839\u64da\u9700\u8981\u91cd\u7f6e\u9396\u3002<\/p>\n
2. \u7d05\u8272\u9396<\/h2>\n
\u7d05\u8272\u9396\u662f\u4e00\u7a2e\u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe\uff0c\u65e8\u5728\u89e3\u6c7a\u7c21\u55ae\u9396\u5728\u591a\u500bRedis\u5be6\u4f8b\u4e2d\u53ef\u80fd\u51fa\u73fe\u7684\u554f\u984c\u3002\u7d05\u8272\u9396\u7684\u6838\u5fc3\u601d\u60f3\u662f\u4f7f\u7528\u591a\u500bRedis\u5be6\u4f8b\u4f86\u63d0\u9ad8\u9396\u7684\u53ef\u9760\u6027\u3002\u7576\u7372\u53d6\u9396\u6642\uff0c\u5fc5\u9808\u5728\u591a\u500bRedis\u5be6\u4f8b\u4e0a\u6210\u529f\u8a2d\u7f6e\u9396\uff0c\u9019\u6a23\u624d\u80fd\u78ba\u4fdd\u9396\u7684\u6709\u6548\u6027\u3002<\/p>\n
function acquireRedLock($lockName, $expire) {\n    $instances = [redis1, redis2, redis3]; \/\/ \u591a\u500bRedis\u5be6\u4f8b\n    $lockTokens = [];\n    $startTime = time();\n    \n    foreach ($instances as $instance) {\n        $token = uniqid();\n        if ($instance->setnx($lockName, $token)) {\n            $instance->expire($lockName, $expire);\n            $lockTokens[] = $token;\n        }\n    }\n    \n    if (count($lockTokens) >= (count($instances) \/ 2) + 1) {\n        return $lockTokens; \/\/ \u9396\u7372\u53d6\u6210\u529f\n    }\n    \n    \/\/ \u91cb\u653e\u5df2\u7372\u53d6\u7684\u9396\n    foreach ($instances as $instance) {\n        if (in_array($instance->get($lockName), $lockTokens)) {\n            $instance->del($lockName);\n        }\n    }\n    return false; \/\/ \u9396\u7372\u53d6\u5931\u6557\n}\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u591a\u500bRedis\u5be6\u4f8b\u4f86\u7372\u53d6\u9396\uff0c\u4e26\u78ba\u4fdd\u81f3\u5c11\u6709\u4e00\u534a\u4ee5\u4e0a\u7684\u5be6\u4f8b\u6210\u529f\u8a2d\u7f6e\u9396\uff0c\u5f9e\u800c\u63d0\u9ad8\u9396\u7684\u53ef\u9760\u6027\u3002<\/p>\n
3. \u53ef\u91cd\u5165\u9396<\/h2>\n
\u53ef\u91cd\u5165\u9396\u5141\u8a31\u540c\u4e00\u500b\u9032\u7a0b\u591a\u6b21\u7372\u53d6\u9396\uff0c\u800c\u4e0d\u6703\u9020\u6210\u6b7b\u9396\u3002\u9019\u7a2e\u9396\u6a5f\u5236\u901a\u5e38\u4f7f\u7528\u4e00\u500b\u8a08\u6578\u5668\u4f86\u8ddf\u8e64\u9396\u7684\u7372\u53d6\u6b21\u6578\u3002\u7576\u9032\u7a0b\u91cb\u653e\u9396\u6642\uff0c\u53ea\u6709\u7576\u8a08\u6578\u5668\u6e1b\u5230\u96f6\u6642\uff0c\u9396\u624d\u6703\u88ab\u771f\u6b63\u91cb\u653e\u3002<\/p>\n
function acquireReentrantLock($lockName, $expire) {\n    $currentCount = redis()->get($lockName . ':count') ?: 0;\n    if ($currentCount > 0) {\n        redis()->incr($lockName . ':count'); \/\/ \u589e\u52a0\u8a08\u6578\u5668\n        return true; \/\/ \u9396\u5df2\u7372\u53d6\n    }\n    \n    if (redis()->setnx($lockName, time() + $expire)) {\n        redis()->set($lockName . ':count', 1);\n        return true; \/\/ \u9396\u7372\u53d6\u6210\u529f\n    }\n    \n    return false; \/\/ \u9396\u7372\u53d6\u5931\u6557\n}\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e00\u500b\u8a08\u6578\u5668\u4f86\u8ddf\u8e64\u9396\u7684\u7372\u53d6\u6b21\u6578\uff0c\u5f9e\u800c\u5be6\u73fe\u53ef\u91cd\u5165\u9396\u7684\u529f\u80fd\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u6a5f\u5236\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5206\u4f48\u5f0f\u74b0\u5883\u4e2d\u6709\u6548\u5730\u7ba1\u7406\u4e26\u767c\u64cd\u4f5c\u3002\u7c21\u55ae\u9396\u9069\u5408\u65bc\u55ae\u4e00Redis\u5be6\u4f8b\u7684\u5834\u666f\uff0c\u800c\u7d05\u8272\u9396\u5247\u9069\u5408\u65bc\u591a\u5be6\u4f8b\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u3002\u53ef\u91cd\u5165\u9396\u5247\u70ba\u9700\u8981\u591a\u6b21\u7372\u53d6\u9396\u7684\u5834\u666f\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u3002\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9396\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 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 \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 \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":"
\u63a2\u7d22Redis\u7684\u4e09\u7a2e\u9396\u6a5f\u5236\uff0c\u9748\u6d3b\u61c9\u7528\u65bc\u5206\u4f48\u5f0f\u7cfb\u7d71\uff0c\u63d0\u5347\u6027\u80fd\u8207\u5b89\u5168\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\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-197494","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197494","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=197494"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197494\/revisions"}],"predecessor-version":[{"id":197495,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197494\/revisions\/197495"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=197494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=197494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=197494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}