{"id":161161,"date":"2024-11-04T04:07:45","date_gmt":"2024-11-03T20:07:45","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161161\/"},"modified":"2024-11-04T04:07:46","modified_gmt":"2024-11-03T20:07:46","slug":"%e6%a9%9f%e5%88%b6-redis-%e7%82%ba%e9%9a%8a%e5%88%97%e6%93%8d%e4%bd%9c%e6%8f%90%e4%be%9b%e7%9a%84%e5%8a%a0%e9%8e%96%e6%a9%9f%e5%88%b6%ef%bc%88redis-%e9%9a%8a%e5%88%97%e5%8a%a0%e9%8e%96%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161161\/","title":{"rendered":"\u6a5f\u5236 Redis \u70ba\u968a\u5217\u64cd\u4f5c\u63d0\u4f9b\u7684\u52a0\u9396\u6a5f\u5236\uff08redis \u968a\u5217\u52a0\u9396\uff09"},"content":{"rendered":"<h1 id=\"%e6%a9%9f%e5%88%b6-redis-%e7%82%ba%e9%9a%8a%e5%88%97%e6%93%8d%e4%bd%9c%e6%8f%90%e4%be%9b%e7%9a%84%e5%8a%a0%e9%8e%96%e6%a9%9f%e5%88%b6%ef%bc%88redis-%e9%9a%8a%e5%88%97%e5%8a%a0%e9%8e%96%ef%bc%89-bVJnisvLQE\">\u6a5f\u5236 Redis \u70ba\u968a\u5217\u64cd\u4f5c\u63d0\u4f9b\u7684\u52a0\u9396\u6a5f\u5236\uff08redis \u968a\u5217\u52a0\u9396\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u968a\u5217\u64cd\u4f5c\u662f\u8655\u7406\u5927\u91cf\u8acb\u6c42\u548c\u4efb\u52d9\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\u6578\u64da\u7d50\u69cb\u548c\u529f\u80fd\uff0c\u5176\u4e2d\u5305\u62ec\u5f37\u5927\u7684\u968a\u5217\u64cd\u4f5c\u80fd\u529b\u3002\u7136\u800c\uff0c\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u74b0\u5883\u4e2d\uff0c\u5982\u4f55\u78ba\u4fdd\u968a\u5217\u64cd\u4f5c\u7684\u5b89\u5168\u6027\u548c\u4e00\u81f4\u6027\uff0c\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e Redis \u5728\u968a\u5217\u64cd\u4f5c\u4e2d\u63d0\u4f9b\u7684\u52a0\u9396\u6a5f\u5236\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"redis-%e7%9a%84%e5%9f%ba%e6%9c%ac%e9%9a%8a%e5%88%97%e6%93%8d%e4%bd%9c-bVJnisvLQE\">Redis \u7684\u57fa\u672c\u968a\u5217\u64cd\u4f5c<\/h2>\n<p>Redis \u652f\u6301\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u968a\u5217\u64cd\u4f5c\u662f\u4f7f\u7528\u5217\u8868\uff08List\uff09\u4f86\u5be6\u73fe\u3002Redis \u7684\u5217\u8868\u652f\u6301\u5f9e\u5169\u7aef\u9032\u884c\u63d2\u5165\u548c\u522a\u9664\u64cd\u4f5c\uff0c\u9019\u4f7f\u5f97\u5b83\u975e\u5e38\u9069\u5408\u7528\u4f5c\u968a\u5217\u3002\u57fa\u672c\u7684\u968a\u5217\u64cd\u4f5c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>LPUSH<\/code>\uff1a\u5c07\u4e00\u500b\u6216\u591a\u500b\u503c\u63d2\u5165\u5230\u5217\u8868\u7684\u5de6\u5074\u3002<\/li>\n<li><code>RPUSH<\/code>\uff1a\u5c07\u4e00\u500b\u6216\u591a\u500b\u503c\u63d2\u5165\u5230\u5217\u8868\u7684\u53f3\u5074\u3002<\/li>\n<li><code>LPOP<\/code>\uff1a\u79fb\u9664\u4e26\u8fd4\u56de\u5217\u8868\u7684\u5de6\u5074\u7b2c\u4e00\u500b\u5143\u7d20\u3002<\/li>\n<li><code>RPOP<\/code>\uff1a\u79fb\u9664\u4e26\u8fd4\u56de\u5217\u8868\u7684\u53f3\u5074\u7b2c\u4e00\u500b\u5143\u7d20\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u64cd\u4f5c\u4f7f\u5f97 Redis \u80fd\u5920\u9ad8\u6548\u5730\u8655\u7406\u4efb\u52d9\u968a\u5217\uff0c\u4f46\u5728\u591a\u500b\u6d88\u8cbb\u8005\u540c\u6642\u8a2a\u554f\u968a\u5217\u6642\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u7af6\u722d\u689d\u4ef6\uff0c\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/p>\n<h2 id=\"%e5%8a%a0%e9%8e%96%e6%a9%9f%e5%88%b6%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-bVJnisvLQE\">\u52a0\u9396\u6a5f\u5236\u7684\u91cd\u8981\u6027<\/h2>\n<p>\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u74b0\u5883\u4e2d\uff0c\u7576\u591a\u500b\u6d88\u8cbb\u8005\u540c\u6642\u5f9e\u968a\u5217\u4e2d\u53d6\u51fa\u4efb\u52d9\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u4ee5\u4e0b\u554f\u984c\uff1a<\/p>\n<ul>\n<li>\u91cd\u8907\u8655\u7406\u540c\u4e00\u4efb\u52d9\u3002<\/li>\n<li>\u4efb\u52d9\u4e1f\u5931\u6216\u672a\u88ab\u8655\u7406\u3002<\/li>\n<li>\u6578\u64da\u4e0d\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u5be6\u65bd\u52a0\u9396\u6a5f\u5236\u662f\u78ba\u4fdd\u968a\u5217\u64cd\u4f5c\u5b89\u5168\u6027\u7684\u91cd\u8981\u6b65\u9a5f\u3002Redis \u63d0\u4f9b\u4e86\u591a\u7a2e\u52a0\u9396\u7b56\u7565\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662f\u57fa\u65bc Redis \u7684\u5206\u4f48\u5f0f\u9396\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-bVJnisvLQE\">Redis \u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe<\/h2>\n<p>Redis \u7684\u5206\u4f48\u5f0f\u9396\u901a\u5e38\u4f7f\u7528 <code>SETNX<\/code> \u547d\u4ee4\u4f86\u5be6\u73fe\u3002\u9019\u500b\u547d\u4ee4\u7684\u5168\u540d\u662f\u300cSET if Not eXists\u300d\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\uff0c\u624d\u6703\u8a2d\u7f6e\u9375\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe\u793a\u4f8b\uff1a<\/p>\n<pre><code>function acquireLock(redis, lockKey, lockValue, expireTime) {\n    \/\/ \u5617\u8a66\u7372\u53d6\u9396\n    const result = redis.set(lockKey, lockValue, 'NX', 'PX', expireTime);\n    return result === 'OK';\n}\n\nfunction releaseLock(redis, lockKey, lockValue) {\n    \/\/ \u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u5ba2\u6236\u7aef\u624d\u80fd\u91cb\u653e\u9396\n    const script = `\n        if redis.call(\"get\", KEYS[1]) == ARGV[1] then\n            return redis.call(\"del\", KEYS[1])\n        else\n            return 0\n        end\n    `;\n    return redis.eval(script, 1, lockKey, lockValue);\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c<code>acquireLock<\/code> \u51fd\u6578\u5617\u8a66\u7372\u53d6\u9396\uff0c\u5982\u679c\u6210\u529f\u5247\u8fd4\u56de <code>true<\/code>\uff0c\u5426\u5247\u8fd4\u56de <code>false<\/code>\u3002<code>releaseLock<\/code> \u51fd\u6578\u5247\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u5ba2\u6236\u7aef\u624d\u80fd\u91cb\u653e\u9396\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u932f\u8aa4\u91cb\u653e\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%8a%a0%e9%8e%96%e6%a9%9f%e5%88%b6%e7%9a%84%e9%9a%8a%e5%88%97%e6%93%8d%e4%bd%9c%e7%a4%ba%e4%be%8b-bVJnisvLQE\">\u4f7f\u7528\u52a0\u9396\u6a5f\u5236\u7684\u968a\u5217\u64cd\u4f5c\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 Redis \u52a0\u9396\u6a5f\u5236\u7684\u968a\u5217\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<pre><code>function processQueue(redis) {\n    const lockKey = 'lock:queue';\n    const lockValue = 'unique_lock_value';\n    const expireTime = 10000; \/\/ \u9396\u7684\u904e\u671f\u6642\u9593\n\n    if (acquireLock(redis, lockKey, lockValue, expireTime)) {\n        try {\n            \/\/ \u5f9e\u968a\u5217\u4e2d\u53d6\u51fa\u4efb\u52d9\n            const task = redis.lpop('task_queue');\n            if (task) {\n                \/\/ \u8655\u7406\u4efb\u52d9\n                console.log(`Processing task: ${task}`);\n            }\n        } finally {\n            \/\/ \u91cb\u653e\u9396\n            releaseLock(redis, lockKey, lockValue);\n        }\n    } else {\n        console.log('Could not acquire lock, another process is handling the queue.');\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576\u4e00\u500b\u9032\u7a0b\u5617\u8a66\u8655\u7406\u968a\u5217\u6642\uff0c\u5b83\u9996\u5148\u7372\u53d6\u9396\uff0c\u7136\u5f8c\u5f9e\u968a\u5217\u4e2d\u53d6\u51fa\u4efb\u52d9\u4e26\u9032\u884c\u8655\u7406\u3002\u8655\u7406\u5b8c\u6210\u5f8c\uff0c\u9032\u7a0b\u91cb\u653e\u9396\uff0c\u9019\u6a23\u5176\u4ed6\u9032\u7a0b\u5c31\u53ef\u4ee5\u5b89\u5168\u5730\u8a2a\u554f\u968a\u5217\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-bVJnisvLQE\">\u7e3d\u7d50<\/h2>\n<p>Redis \u63d0\u4f9b\u7684\u52a0\u9396\u6a5f\u5236\u70ba\u968a\u5217\u64cd\u4f5c\u63d0\u4f9b\u4e86\u5fc5\u8981\u7684\u5b89\u5168\u6027\u548c\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u74b0\u5883\u4e2d\u3002\u901a\u904e\u4f7f\u7528\u5206\u4f48\u5f0f\u9396\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u7af6\u722d\u689d\u4ef6\uff0c\u78ba\u4fdd\u4efb\u52d9\u7684\u6b63\u78ba\u8655\u7406\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u968a\u5217\u64cd\u4f5c\u7684\u61c9\u7528\uff0cRedis \u662f\u4e00\u500b\u7406\u60f3\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u642d\u5efa Redis \u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Redis \u968a\u5217\u52a0\u9396\u6a5f\u5236\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u4f75\u767c\u64cd\u4f5c\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\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-161161","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161161","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=161161"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161161\/revisions"}],"predecessor-version":[{"id":161162,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161161\/revisions\/161162"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}