{"id":202292,"date":"2025-05-10T09:07:09","date_gmt":"2025-05-10T01:07:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202292\/"},"modified":"2025-05-10T09:07:09","modified_gmt":"2025-05-10T01:07:09","slug":"redis%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e4%ba%8b%e5%8a%a1%e7%9a%84%e5%8f%af%e9%9d%a0%e6%80%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202292\/","title":{"rendered":"Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684\u53ef\u9760\u6027"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684\u53ef\u9760\u6027<\/h1>\n<p>\u76ee\u524dgolang\u5b66\u4e60\u7f51\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6570\u636e\u5e93<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aRedis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684\u53ef\u9760\u6027\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6570\u636e\u5e93<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n<p>Redis\u662f\u4e00\u79cd\u5feb\u901f\u3001\u53ef\u9760\u7684\u5185\u5b58\u6570\u636e\u5e93\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u3002\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u4e8b\u52a1\u7684\u5904\u7406\u662f\u4e00\u9879\u5173\u952e\u7684\u6311\u6218\u3002\u672c\u6587\u5c06\u4ecb\u7ecdRedis\u662f\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684\u53ef\u9760\u6027\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<p>Redis\u901a\u8fc7MULTI\u3001EXEC\u3001DISCARD\u548cWATCH\u56db\u4e2a\u547d\u4ee4\u6765\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u3002MULTI\u547d\u4ee4\u7528\u4e8e\u5f00\u542f\u4e00\u4e2a\u4e8b\u52a1\uff0cEXEC\u547d\u4ee4\u7528\u4e8e\u6267\u884c\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u547d\u4ee4\uff0cDISCARD\u547d\u4ee4\u7528\u4e8e\u53d6\u6d88\u5f53\u524d\u4e8b\u52a1\uff0c\u800cWATCH\u547d\u4ee4\u7528\u4e8e\u76d1\u89c6\u4e00\u4e2a\u6216\u591a\u4e2a\u952e\uff0c\u5982\u679c\u5728\u4e8b\u52a1\u6267\u884c\u671f\u95f4\u6240\u76d1\u89c6\u7684\u952e\u88ab\u4fee\u6539\uff0c\u5219\u4e8b\u52a1\u88ab\u53d6\u6d88\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528Redis\u8fdb\u884c\u5206\u5e03\u5f0f\u4e8b\u52a1\u5904\u7406\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>import redis\n\ndef transfer_money(from_account, to_account, amount):\n    # \u8fde\u63a5\u5230Redis\u670d\u52a1\u5668\n    r = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n    # \u5f00\u542f\u4e8b\u52a1\n    pipe = r.pipeline()\n    try:\n        # \u76d1\u89c6from_account\u548cto_account\u4e24\u4e2a\u952e\n        pipe.watch(from_account, to_account)\n        \n        # \u68c0\u67e5from_account\u7684\u4f59\u989d\u662f\u5426\u8db3\u591f\n        if int(r.get(from_account)) &gt;= amount:\n            # \u6263\u9664from_account\u7684\u91d1\u989d\n            pipe.decrby(from_account, amount)\n            # \u589e\u52a0to_account\u7684\u91d1\u989d\n            pipe.incrby(to_account, amount)\n            \n            # \u6267\u884c\u4e8b\u52a1\n            pipe.execute()\n            print(\"\u8f6c\u8d26\u6210\u529f\uff01\")\n        else:\n            print(\"\u4f59\u989d\u4e0d\u8db3\uff0c\u8f6c\u8d26\u5931\u8d25\uff01\")\n    except redis.WatchError:\n        print(\"\u53d1\u751f\u4e86\u5e76\u53d1\u4fee\u6539\uff0c\u8f6c\u8d26\u5931\u8d25\uff01\")\n    finally:\n        # \u53d6\u6d88WATCH\u547d\u4ee4\u7684\u76d1\u89c6\n        pipe.unwatch()<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u9996\u5148\u6211\u4eec\u4f7f\u7528redis.StrictRedis()\u65b9\u6cd5\u8fde\u63a5\u5230Redis\u670d\u52a1\u5668\u3002\u7136\u540e\u4f7f\u7528pipeline()\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u7ba1\u9053\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u7528\u4e8e\u5c06\u591a\u4e2aRedis\u547d\u4ee4\u6253\u5305\u6210\u4e00\u4e2a\u4e8b\u52a1\u3002<\/p>\n<p>\u5728\u4e8b\u52a1\u5f00\u59cb\u524d\uff0c\u6211\u4eec\u4f7f\u7528WATCH\u547d\u4ee4\u76d1\u89c6from_account\u548cto_account\u4e24\u4e2a\u952e\u3002\u5982\u679c\u5728\u4e8b\u52a1\u6267\u884c\u671f\u95f4\uff0c\u8fd9\u4e24\u4e2a\u952e\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u88ab\u4fee\u6539\uff0c\u90a3\u4e48\u4e8b\u52a1\u5c06\u88ab\u53d6\u6d88\u3002<\/p>\n<p>\u7136\u540e\uff0c\u5728\u4e8b\u52a1\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u68c0\u67e5from_account\u7684\u4f59\u989d\u662f\u5426\u8db3\u591f\u3002\u5982\u679c\u8db3\u591f\uff0c\u6211\u4eec\u4f7f\u7528DECRBY\u547d\u4ee4\u6263\u9664from_account\u7684\u91d1\u989d\uff0c\u4f7f\u7528INCRBY\u547d\u4ee4\u589e\u52a0to_account\u7684\u91d1\u989d\u3002\u6700\u540e\uff0c\u6211\u4eec\u4f7f\u7528EXEC\u547d\u4ee4\u6765\u6267\u884c\u4e8b\u52a1\u3002<\/p>\n<p>\u5728try\u8bed\u53e5\u5757\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528execute()\u65b9\u6cd5\u6765\u6267\u884c\u4e8b\u52a1\u3002\u5982\u679c\u6210\u529f\u6267\u884c\uff0c\u8f6c\u8d26\u6210\u529f\u3002\u5982\u679c\u5728\u4e8b\u52a1\u6267\u884c\u671f\u95f4\uff0cfrom_account\u7684\u4f59\u989d\u53d1\u751f\u4e86\u6539\u53d8\uff0c\u90a3\u4e48\u4f1a\u629b\u51faredis.WatchError\u5f02\u5e38\uff0c\u6211\u4eec\u53ef\u4ee5\u5728except\u8bed\u53e5\u5757\u4e2d\u5904\u7406\u8fd9\u79cd\u5f02\u5e38\u60c5\u51b5\u3002<\/p>\n<p>\u6700\u540e\uff0c\u6211\u4eec\u4f7f\u7528UNWATCH\u547d\u4ee4\u53d6\u6d88\u5bf9from_account\u548cto_account\u7684\u76d1\u89c6\u3002<\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u4e0a\u8ff0\u4ee3\u7801\u793a\u4f8b\u4e2d\u63d0\u4f9b\u7684Redis\u547d\u4ee4\u548c\u6280\u672f\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u7684\u53ef\u9760\u4e8b\u52a1\u5904\u7406\u3002\u5f53\u5e76\u53d1\u4fee\u6539\u53d1\u751f\u65f6\uff0cRedis\u80fd\u591f\u4fdd\u8bc1\u4e8b\u52a1\u7684\u4e00\u81f4\u6027\u548c\u53ef\u9760\u6027\uff0c\u786e\u4fdd\u6570\u636e\u7684\u51c6\u786e\u6027\u3002<\/p>\n<p>\u603b\u7ed3\u8d77\u6765\uff0cRedis\u901a\u8fc7MULTI\u3001EXEC\u3001DISCARD\u548cWATCH\u547d\u4ee4\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u5355\u800c\u9ad8\u6548\u7684\u5206\u5e03\u5f0f\u4e8b\u52a1\u5904\u7406\u673a\u5236\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u5229\u7528\u8fd9\u4e9b\u547d\u4ee4\u548c\u6280\u672f\uff0c\u5b9e\u73b0\u53ef\u9760\u7684\u5206\u5e03\u5f0f\u4e8b\u52a1\uff0c\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u7ba1\u7406\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5982\u4f55\u4f7f\u7528Vue\u5b9e\u73b0\u56fe\u8868\u5c55\u793a\u529f\u80fd\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u5982\u4f55\u5b9e\u73b0\u5206\u5e03\u5f0f\u4e8b\u52a1\u7684\u53ef&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-202292","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202292","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202292"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202292\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}