{"id":197630,"date":"2024-11-14T09:24:20","date_gmt":"2024-11-14T01:24:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/197630\/"},"modified":"2024-11-14T09:24:21","modified_gmt":"2024-11-14T01:24:21","slug":"%e5%88%a9%e7%94%a8redis%e5%af%a6%e7%8f%be%e8%87%aa%e5%a2%9e%e5%ba%8f%e5%88%97%e5%be%aa%e7%92%b0%e5%88%a9%e7%94%a8%e7%9a%84%e7%b0%a1%e5%96%ae%e6%96%b9%e5%bc%8f%ef%bc%88redis%e8%87%aa%e5%a2%9e%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/197630\/","title":{"rendered":"\u5229\u7528Redis\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u5faa\u74b0\u5229\u7528\u7684\u7c21\u55ae\u65b9\u5f0f\uff08redis\u81ea\u589e\u5e8f\u5217\u5faa\u74b0\uff09"},"content":{"rendered":"

\u5229\u7528Redis\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u5faa\u74b0\u5229\u7528\u7684\u7c21\u55ae\u65b9\u5f0f\uff08redis\u81ea\u589e\u5e8f\u5217\u5faa\u74b0\uff09<\/h1>\n

\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u5e8f\u5217\u865f\u7684\u751f\u6210\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u7528\u65bc\u8a02\u55ae\u7de8\u865f\u3001\u7528\u6236ID\u9084\u662f\u5176\u4ed6\u9700\u8981\u552f\u4e00\u6a19\u8b58\u7684\u5834\u666f\uff0c\u81ea\u589e\u5e8f\u5217\u7684\u7ba1\u7406\u90fd\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u5f37\u5927\u7684\u81ea\u589e\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u8f15\u9b06\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u7684\u5faa\u74b0\u5229\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u7684\u5faa\u74b0\u5229\u7528\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n

Redis\u81ea\u589e\u5e8f\u5217\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

Redis\u63d0\u4f9b\u4e86\u4e00\u500b\u540d\u70baINCR\u7684\u547d\u4ee4\uff0c\u8a72\u547d\u4ee4\u53ef\u4ee5\u5c0d\u6307\u5b9a\u7684\u9375\u9032\u884c\u81ea\u589e\u64cd\u4f5c\u3002\u7576\u9375\u4e0d\u5b58\u5728\u6642\uff0cRedis\u6703\u81ea\u52d5\u5275\u5efa\u8a72\u9375\u4e26\u5c07\u5176\u503c\u8a2d\u7f6e\u70ba1\u3002\u9019\u4f7f\u5f97Redis\u6210\u70ba\u751f\u6210\u81ea\u589e\u5e8f\u5217\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n

\u81ea\u589e\u5e8f\u5217\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n

\u4ee5\u4e0b\u662f\u4f7f\u7528Redis\u751f\u6210\u81ea\u589e\u5e8f\u5217\u7684\u57fa\u672c\u793a\u4f8b\uff1a<\/p>\n

127.0.0.1:6379> INCR my_sequence\n(integer) 1\n127.0.0.1:6379> INCR my_sequence\n(integer) 2\n127.0.0.1:6379> INCR my_sequence\n(integer) 3\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u4f7f\u7528INCR\u547d\u4ee4\u5c0d\u9375\u201cmy_sequence\u201d\u9032\u884c\u81ea\u589e\u64cd\u4f5c\uff0c\u6bcf\u6b21\u8abf\u7528\u8a72\u547d\u4ee4\u6642\uff0c\u8a72\u9375\u7684\u503c\u90fd\u6703\u589e\u52a01\u3002<\/p>\n
\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u7684\u5faa\u74b0\u5229\u7528<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u5e0c\u671b\u81ea\u589e\u5e8f\u5217\u5728\u9054\u5230\u67d0\u500b\u4e0a\u9650\u5f8c\u91cd\u65b0\u958b\u59cb\u3002\u4f8b\u5982\uff0c\u7576\u5e8f\u5217\u865f\u9054\u5230100\u6642\uff0c\u6211\u5011\u5e0c\u671b\u5b83\u80fd\u5920\u91cd\u65b0\u5f9e1\u958b\u59cb\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728\u81ea\u589e\u64cd\u4f5c\u5f8c\u9032\u884c\u6aa2\u67e5\u4f86\u5be6\u73fe\u3002<\/p>\n
\u5faa\u74b0\u5229\u7528\u7684\u908f\u8f2f<\/h3>\n
\u6211\u5011\u53ef\u4ee5\u4f7f\u7528Redis\u7684WATCH\u547d\u4ee4\u4f86\u5be6\u73fe\u9019\u4e00\u908f\u8f2f\u3002WATCH\u547d\u4ee4\u53ef\u4ee5\u76e3\u8996\u4e00\u500b\u6216\u591a\u500b\u9375\uff0c\u7576\u9019\u4e9b\u9375\u7684\u503c\u5728\u4e8b\u52d9\u57f7\u884c\u4e4b\u524d\u88ab\u4fee\u6539\u6642\uff0c\u4e8b\u52d9\u5c07\u6703\u5931\u6557\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u5faa\u74b0\u5229\u7528\u793a\u4f8b\uff1a<\/p>\n
def get_next_sequence(redis_client, sequence_key, max_value):\n    while True:\n        # \u76e3\u8996\u5e8f\u5217\u9375\n        redis_client.watch(sequence_key)\n        current_value = redis_client.get(sequence_key)\n        \n        # \u5982\u679c\u9375\u4e0d\u5b58\u5728\uff0c\u5247\u8a2d\u7f6e\u70ba1\n        if current_value is None:\n            next_value = 1\n        else:\n            next_value = (int(current_value) + 1) % (max_value + 1)\n            if next_value == 0:\n                next_value = 1\n        \n        # \u958b\u59cb\u4e8b\u52d9\n        pipe = redis_client.pipeline()\n        pipe.multi()\n        pipe.set(sequence_key, next_value)\n        \n        # \u63d0\u4ea4\u4e8b\u52d9\n        try:\n            pipe.execute()\n            return next_value\n        except redis.WatchError:\n            # \u5982\u679c\u9375\u88ab\u4fee\u6539\uff0c\u5247\u91cd\u65b0\u958b\u59cb\u5faa\u74b0\n            continue\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u51fd\u6578get_next_sequence\uff0c\u8a72\u51fd\u6578\u63a5\u53d7Redis\u5ba2\u6236\u7aef\u3001\u5e8f\u5217\u9375\u548c\u6700\u5927\u503c\u4f5c\u70ba\u53c3\u6578\u3002\u5b83\u6703\u4e0d\u65b7\u6aa2\u67e5\u7576\u524d\u5e8f\u5217\u503c\uff0c\u4e26\u5728\u9054\u5230\u6700\u5927\u503c\u5f8c\u91cd\u65b0\u5f9e1\u958b\u59cb\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5229\u7528Redis\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u7684\u5faa\u74b0\u5229\u7528\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u4f7f\u7528INCR\u547d\u4ee4\u548cWATCH\u547d\u4ee4\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u7ba1\u7406\u5e8f\u5217\u865f\u7684\u751f\u6210\u548c\u91cd\u7f6e\u3002\u9019\u7a2e\u65b9\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u5e8f\u5217\u865f\u7684\u552f\u4e00\u6027\u548c\u9023\u7e8c\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u61c9\u7528\u7a0b\u5f0f\u6578\u64da\uff0c\u8003\u616e\u4f7f\u7528Redis\u4f5c\u70ba\u60a8\u7684\u6578\u64da\u5b58\u5132\u9078\u64c7\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0cRedis\u90fd\u80fd\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5982\u4f55\u5229\u7528Redis\u5be6\u73fe\u81ea\u589e\u5e8f\u5217\u7684\u5faa\u74b0\u5229\u7528\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\u4e26\u63d0\u9ad8\u6027\u80fd\u7684\u6709\u6548\u65b9\u6cd5\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-197630","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197630","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=197630"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197630\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=197630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=197630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=197630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}