{"id":162169,"date":"2024-11-04T12:42:08","date_gmt":"2024-11-04T04:42:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162169\/"},"modified":"2024-11-04T12:42:09","modified_gmt":"2024-11-04T04:42:09","slug":"%e7%9b%a3%e6%8e%a7-redis-%e4%b8%ad-key-%e9%81%8e%e6%9c%9f%e4%ba%8b%e4%bb%b6%e5%af%a6%e6%99%82%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e5%ae%89%e5%85%a8%ef%bc%88redis-%e7%9b%a3%e8%81%bd-key-%e9%81%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162169\/","title":{"rendered":"\u76e3\u63a7 Redis \u4e2d Key \u904e\u671f\u4e8b\u4ef6\u5be6\u6642\u4fdd\u8b49\u6578\u64da\u5b89\u5168\uff08redis \u76e3\u807d key \u904e\u671f\uff09"},"content":{"rendered":"

\u76e3\u63a7 Redis \u4e2d Key \u904e\u671f\u4e8b\u4ef6\u5be6\u6642\u4fdd\u8b49\u6578\u64da\u5b89\u5168<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u53ef\u9760\u6027\u81f3\u95dc\u91cd\u8981\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5feb\u901f\u8b80\u53d6\u548c\u5beb\u5165\u7684\u61c9\u7528\u4e2d\u3002\u7136\u800c\uff0cRedis \u4e2d\u7684 Key \u904e\u671f\u4e8b\u4ef6\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\uff0c\u9019\u5c0d\u65bc\u67d0\u4e9b\u61c9\u7528\u4f86\u8aaa\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002\u56e0\u6b64\uff0c\u76e3\u63a7 Redis \u4e2d\u7684 Key \u904e\u671f\u4e8b\u4ef6\u6210\u70ba\u4e86\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u7684\u4e00\u500b\u91cd\u8981\u8ab2\u984c\u3002<\/p>\n

Redis \u7684 Key \u904e\u671f\u6a5f\u5236<\/h2>\n

Redis \u63d0\u4f9b\u4e86\u8a2d\u7f6e Key \u904e\u671f\u7684\u529f\u80fd\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u53ef\u4ee5\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u81ea\u52d5\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u3002\u9019\u4e00\u6a5f\u5236\u5c0d\u65bc\u7de9\u5b58\u6578\u64da\u7279\u5225\u6709\u7528\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u81ea\u52d5\u6e05\u7406\u904e\u671f\u7684\u6578\u64da\uff0c\u91cb\u653e\u5167\u5b58\u7a7a\u9593\u3002\u7528\u6236\u53ef\u4ee5\u4f7f\u7528 EXPIRE<\/code> \u547d\u4ee4\u4f86\u8a2d\u7f6e Key \u7684\u904e\u671f\u6642\u9593\uff0c\u4f8b\u5982\uff1a<\/p>\n

EXPIRE mykey 60<\/code><\/pre>\n
\u4e0a\u8ff0\u547d\u4ee4\u5c07\u6703\u5728 60 \u79d2\u5f8c\u81ea\u52d5\u522a\u9664\u540d\u70ba mykey<\/code> \u7684 Key\u3002<\/p>\n
\u76e3\u63a7 Key \u904e\u671f\u4e8b\u4ef6\u7684\u91cd\u8981\u6027<\/h2>\n
\u96d6\u7136 Redis \u63d0\u4f9b\u4e86\u904e\u671f\u6a5f\u5236\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u904e\u671f\u7684 Key \u53ef\u80fd\u6703\u5f71\u97ff\u61c9\u7528\u7684\u6b63\u5e38\u904b\u884c\u3002\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u61c9\u7528\u4f9d\u8cf4\u65bc\u67d0\u4e9b Key \u7684\u5b58\u5728\u6642\uff0c\u9019\u4e9b Key \u7684\u904e\u671f\u53ef\u80fd\u6703\u5c0e\u81f4\u61c9\u7528\u51fa\u73fe\u932f\u8aa4\u6216\u7570\u5e38\u884c\u70ba\u3002\u56e0\u6b64\uff0c\u5be6\u6642\u76e3\u63a7 Key \u7684\u904e\u671f\u4e8b\u4ef6\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002<\/p>\n
\u5982\u4f55\u76e3\u63a7 Redis \u4e2d\u7684 Key \u904e\u671f\u4e8b\u4ef6<\/h2>\n
Redis \u63d0\u4f9b\u4e86\u4e00\u7a2e\u540d\u70ba Keyspace Notifications<\/code> \u7684\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u76e3\u807d Key \u7684\u904e\u671f\u4e8b\u4ef6\u3002\u901a\u904e\u555f\u7528\u9019\u4e00\u529f\u80fd\uff0c\u7528\u6236\u53ef\u4ee5\u5728 Key \u904e\u671f\u6642\u63a5\u6536\u5230\u901a\u77e5\u3002\u8981\u555f\u7528 Keyspace Notifications\uff0c\u53ef\u4ee5\u5728 Redis \u914d\u7f6e\u6587\u4ef6\u4e2d\u8a2d\u7f6e\u4ee5\u4e0b\u53c3\u6578\uff1a<\/p>\n
notify-keyspace-events Ex<\/code><\/pre>\n
\u9019\u6a23\u8a2d\u7f6e\u5f8c\uff0c\u7576 Key \u904e\u671f\u6642\uff0cRedis \u5c07\u6703\u767c\u9001\u4e00\u500b\u901a\u77e5\u5230\u76f8\u61c9\u7684\u983b\u9053\u3002\u7528\u6236\u53ef\u4ee5\u4f7f\u7528 Redis \u7684 SUBSCRIBE<\/code> \u547d\u4ee4\u4f86\u8a02\u95b1\u9019\u4e9b\u901a\u77e5\u3002\u4f8b\u5982\uff1a<\/p>\n
SUBSCRIBE __keyevent@0__:expired<\/code><\/pre>\n
\u9019\u6a23\uff0c\u7576\u4efb\u4f55 Key \u5728\u6578\u64da\u5eab 0 \u4e2d\u904e\u671f\u6642\uff0c\u8a02\u95b1\u8005\u5c07\u6703\u6536\u5230\u901a\u77e5\u3002<\/p>\n
\u5be6\u73fe\u904e\u671f\u4e8b\u4ef6\u7684\u76e3\u63a7\u793a\u4f8b<\/h2>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 Python \u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 Redis \u7684 Keyspace Notifications \u4f86\u76e3\u63a7 Key \u7684\u904e\u671f\u4e8b\u4ef6\uff1a<\/p>\n
import redis\n\n# \u9023\u63a5\u5230 Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n# \u8a2d\u7f6e Key \u7684\u904e\u671f\u6642\u9593\nr.set('mykey', 'value')\nr.expire('mykey', 10)\n\n# \u8a02\u95b1\u904e\u671f\u4e8b\u4ef6\npubsub = r.pubsub()\npubsub.subscribe('__keyevent@0__:expired')\n\n# \u76e3\u807d\u4e8b\u4ef6\nfor message in pubsub.listen():\n    if message['type'] == 'message':\n        print(f\"Key {message['data']} has expired.\")\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u8a2d\u7f6e\u4e86\u4e00\u500b Key \u4e26\u8a2d\u7f6e\u5176\u904e\u671f\u6642\u9593\uff0c\u7136\u5f8c\u8a02\u95b1\u4e86\u904e\u671f\u4e8b\u4ef6\u7684\u983b\u9053\uff0c\u6700\u5f8c\u9032\u5165\u4e00\u500b\u5faa\u74b0\u4f86\u76e3\u807d\u4e8b\u4ef6\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u76e3\u63a7 Redis \u4e2d\u7684 Key \u904e\u671f\u4e8b\u4ef6\u5c0d\u65bc\u78ba\u4fdd\u6578\u64da\u5b89\u5168\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528 Keyspace Notifications\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5be6\u6642\u7372\u53d6 Key \u904e\u671f\u7684\u901a\u77e5\uff0c\u5f9e\u800c\u63a1\u53d6\u76f8\u61c9\u7684\u63aa\u65bd\u4f86\u4fdd\u8b77\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u548c\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u61c9\u7528\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u9019\u4e00\u76e3\u63a7\u6a5f\u5236\u5c07\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 \u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684 Redis \u5be6\u4f8b\uff0cServer.HK \u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u670d\u52d9\uff0c\u5e6b\u52a9\u60a8\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5be6\u6642\u76e3\u63a7 Redis \u4e2d\u7684 Key \u904e\u671f\u4e8b\u4ef6\uff0c\u78ba\u4fdd\u6578\u64da\u5b89\u5168\uff0c\u53ca\u6642\u97ff\u61c9\u904e\u671f\u901a\u77e5\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-162169","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162169","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=162169"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162169\/revisions"}],"predecessor-version":[{"id":162170,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162169\/revisions\/162170"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}