{"id":77,"date":"2026-08-20T11:10:17","date_gmt":"2026-08-20T03:10:17","guid":{"rendered":"https:\/\/www.deartester.com\/index.php\/2026\/09\/01\/%e9%93%b6%e8%a1%8c%e6%a0%b8%e5%bf%83%e7%b3%bb%e7%bb%9f%e6%b5%8b%e8%af%95%ef%bc%9a%e4%ba%a4%e6%98%93%e5%b9%82%e7%ad%89%e6%80%a7%e4%b8%8e%e6%95%b0%e6%8d%ae%e4%b8%80%e8%87%b4%e6%80%a7%e9%97%ae%e9%a2%98\/"},"modified":"2026-09-03T23:17:10","modified_gmt":"2026-09-03T15:17:10","slug":"%e9%93%b6%e8%a1%8c%e6%a0%b8%e5%bf%83%e7%b3%bb%e7%bb%9f%e6%b5%8b%e8%af%95%ef%bc%9a%e4%ba%a4%e6%98%93%e5%b9%82%e7%ad%89%e6%80%a7%e4%b8%8e%e6%95%b0%e6%8d%ae%e4%b8%80%e8%87%b4%e6%80%a7%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.deartester.com\/index.php\/2026\/08\/20\/%e9%93%b6%e8%a1%8c%e6%a0%b8%e5%bf%83%e7%b3%bb%e7%bb%9f%e6%b5%8b%e8%af%95%ef%bc%9a%e4%ba%a4%e6%98%93%e5%b9%82%e7%ad%89%e6%80%a7%e4%b8%8e%e6%95%b0%e6%8d%ae%e4%b8%80%e8%87%b4%e6%80%a7%e9%97%ae%e9%a2%98\/","title":{"rendered":"\u94f6\u884c\u6838\u5fc3\u7cfb\u7edf\u6d4b\u8bd5\uff1a\u4ea4\u6613\u5e42\u7b49\u6027\u4e0e\u6570\u636e\u4e00\u81f4\u6027\u95ee\u9898\u6d4b\u8bd5\u5206\u4eab"},"content":{"rendered":"
\u4ece\u4e00\u6b21”\u88ab\u6263\u4e24\u6b21\u94b1”\u7684\u771f\u5b9e\u6545\u969c\u8bf4\u8d77\u2014\u2014\u624b\u628a\u624b\u6559\u4f60\u628a\u5e42\u7b49\u548c\u4e00\u81f4\u6027\u6d4b\u900f\u3001\u6d4b\u5168\u3002<\/span><\/span><\/span><\/section>\n
\u5148\u8bb2\u4e2a\u771f\u4e8b\u3002\u524d\u4e24\u5e74\u6211\u5e26\u56e2\u961f\u505a\u4e00\u5bb6\u57ce\u5546\u884c\u7684\u652f\u4ed8\u6838\u5fc3\u6539\u9020\uff0c\u4e0a\u7ebf\u5f53\u5929\u5c31\u51fa\u4e86\u8fd9\u4e48\u4e00\u6863\u5b50\u4e8b\uff1a<\/span><\/span><\/span><\/span><\/section>\n\n\n\n
\n
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\n

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\u5148\u8bf4\u5b9a\u4e49\u3002\u5e42\u7b49\uff08Idempotent\uff09<\/span>\uff0c\u5728\u6570\u5b66\u548c\u8ba1\u7b97\u673a\u91cc\u6307\u7684\u662f\uff1a<\/span>\u540c\u4e00\u4e2a\u64cd\u4f5c\uff0c\u65e0\u8bba\u6267\u884c\u4e00\u6b21\u8fd8\u662f\u6267\u884c\u591a\u6b21\uff0c\u5bf9\u7cfb\u7edf\u72b6\u6001\u4ea7\u751f\u7684\u7ed3\u679c\u662f\u4e00\u81f4\u7684<\/span><\/strong>\u3002\u7ffb\u8bd1\u6210\u4eba\u8bdd\u5c31\u662f\u2014\u2014\u4f60\u91cd\u590d\u70b9\u3001\u91cd\u590d\u53d1\u3001\u91cd\u590d\u8c03\u7528\uff0c\u7cfb\u7edf\u4e0d\u4f1a\u56e0\u4e3a\u4f60\u591a\u70b9\u4e86\u51e0\u4e0b\u5c31\u591a\u5e72\u51e0\u4ef6\u4e8b<\/span><\/p>\n

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\n
\"\u5fae\u4fe1\u516c\u4f17\u53f7\u4e8c\u7ef4\u7801\"\u56fe\u7247\u5f15\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u626b\u7801\u5173\u6ce8\u9605\u8bfb\u539f\u6587<\/span><\/figcaption><\/figure>\n<\/section>\n

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    \n
  • \u65ad\u70b9 1\uff1a\u8ba2\u5355\u521b\u5efa \/ \u9884\u6263<\/span><\/strong>
    \n
    \u524d\u7aef\u91cd\u590d\u70b9\u51fb\u3001\u5f31\u7f51\u91cd\u53d1\uff0c\u53ef\u80fd\u751f\u6210\u4e24\u7b14\u8ba2\u5355\u6216\u4e24\u6b21\u9884\u6263\u3002\u8fd9\u662f”\u91cd\u590d\u4e0b\u5355”\u7684\u5178\u578b\u6765\u6e90<\/span><\/section>\n<\/li>\n
  • \u65ad\u70b9 2\uff1a\u652f\u4ed8\u53d7\u7406 \/ \u6263\u6b3e<\/span><\/strong>
    \n
    \u652f\u4ed8\u7f51\u5173\u8d85\u65f6\uff0c\u5ba2\u6237\u7aef\u91cd\u8bd5\uff0c\u6838\u5fc3\u7cfb\u7edf\u5982\u679c\u6ca1\u62e6\u4f4f\uff0c\u5c31\u51fa\u73b0”\u4e00\u7b14\u94b1\u6263\u4e24\u6b21”<\/span><\/section>\n<\/li>\n
  • \u65ad\u70b9 3\uff1a\u6e20\u9053\u56de\u8c03 \/ \u901a\u77e5<\/span><\/strong>
    \n
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  • \u65ad\u70b9 4\uff1a\u53d1\u8d27 \/ \u5165\u8d26<\/span><\/strong>
    \n
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    \u8fd9\u56db\u5904\u91cc\uff0c\u53ea\u8981\u6709\u4efb\u610f\u4e00\u5904\u6ca1\u505a\u5e42\u7b49\uff0c\u5ba2\u6237\u5c31\u53ef\u80fd\u5728\u67d0\u4e00\u523b\u53d1\u73b0”\u6211\u7684\u94b1\u600e\u4e48\u5c11\u4e86”\u6216\u8005”\u6211\u7684\u6743\u76ca\u600e\u4e48\u6ca1\u5230\u8d26\u53c8\u6765\u4e86”\u3002\u94f6\u884c\u7cfb\u7edf\u5bf9\u8d44\u91d1\u7684\u8981\u6c42\u662f<\/span>\u5206\u6beb\u4e0d\u5dee<\/span><\/em>\uff0c\u6240\u4ee5\u5e42\u7b49\u4e0d\u662f”\u52a0\u5206\u9879”\uff0c\u800c\u662f”\u4fdd\u547d\u9879”<\/span><\/p>\n\n\n\n
    \n
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    \n

    \u4e8c\u3001\u5e42\u7b49\u6027\u6d4b\u8bd5\u7684 3 \u79cd\u7ecf\u5178\u573a\u666f<\/span><\/h2>\n

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    \n
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    \u4e09\u7c7b\u5e42\u7b49\u573a\u666f\u5bf9\u6bd4\uff1a\u8d85\u65f6\u91cd\u8bd5\u3001\u91cd\u590d\u70b9\u51fb\u3001MQ \u91cd\u590d\u6d88\u8d39<\/span><\/span><\/span><\/p>\n

    \u573a\u666f\u4e00\uff1a\u7f51\u7edc\u8d85\u65f6\u91cd\u8bd5<\/span><\/h3>\n

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    \n

    \u6d4b\u8bd5\u624b\u987a\uff1a<\/span><\/span><\/strong>\u6a21\u62df”\u9996\u6b21\u8bf7\u6c42\u6838\u5fc3\u5df2\u5904\u7406\u4f46\u5ba2\u6237\u7aef\u89c6\u5b83\u4e3a\u8d85\u65f6\uff0c\u968f\u540e\u7528\u76f8\u540c\u5e42\u7b49\u952e\u91cd\u8bd5”\u3002\u65ad\u8a00\uff1a\u8d26\u6237\u53ea\u6263\u4e00\u6b21\uff0c\u6d41\u6c34\u53ea\u8bb0\u4e00\u7b14<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u573a\u666f\u4e8c\uff1a\u524d\u7aef\u91cd\u590d\u70b9\u51fb<\/span><\/h3>\n

    \u7528\u6237\u5728\u5f31\u7f51\u73af\u5883\u4e0b\uff0c\u70b9”\u786e\u8ba4\u652f\u4ed8”\u6ca1\u53cd\u5e94\uff0c\u8fde\u70b9\u4e24\u4e09\u4e0b\u3002\u5982\u679c\u524d\u7aef\u6ca1\u505a\u6309\u94ae\u7f6e\u7070 \/ \u9632\u6296\uff0c\u540e\u7aef\u5c31\u4f1a\u6536\u5230\u591a\u4e2a\u643a\u5e26\u76f8\u540c\u4e1a\u52a1\u53c2\u6570\u7684\u8bf7\u6c42\u3002\u8fd9\u79cd\u573a\u666f\u5728\u624b\u673a\u94f6\u884c\u3001POS \u6536\u5355\u91cc\u6781\u5e38\u89c1<\/span><\/p>\n\n\n\n
    \n

    \u6d4b\u8bd5\u624b\u987a\uff1a<\/span><\/span><\/strong>\u7528\u538b\u6d4b\u5de5\u5177\u6216\u811a\u672c\uff0c\u5728\u6beb\u79d2\u7ea7\u95f4\u9694\u5185\u5e76\u53d1\u53d1\u9001 N \u4e2a\u76f8\u540c\u4e1a\u52a1\u8bf7\u6c42\uff08\u540c\u4e00\u8ba2\u5355\u53f7\u3001\u540c\u4e00\u5e42\u7b49\u952e\uff09\uff0c\u65ad\u8a00\u5168\u7a0b\u53ea\u843d\u4e00\u7b14<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u573a\u666f\u4e09\uff1a\u6d88\u606f\u961f\u5217\u91cd\u590d\u6d88\u8d39<\/span><\/h3>\n

    \u94f6\u884c\u6838\u5fc3\u5927\u91cf\u4f7f\u7528\u6d88\u606f\u961f\u5217\u505a\u89e3\u8026\uff08\u5982\u652f\u4ed8\u6210\u529f\u540e\u53d1\u6d88\u606f\u901a\u77e5\u79ef\u5206\u7cfb\u7edf\u3001\u98ce\u63a7\u7cfb\u7edf\uff09\u3002\u6d88\u606f\u4e2d\u95f4\u4ef6\u666e\u904d\u4fdd\u8bc1\u7684\u662f”\u81f3\u5c11\u4e00\u6b21\u6295\u9012”\uff08At-least-once\uff09<\/span>\uff0c\u4e5f\u5c31\u662f\u53ef\u80fd\u91cd\u590d\u6295\u3002\u6d88\u8d39\u8005\u5982\u679c\u4e0d\u5728\u4e1a\u52a1\u5c42\u505a\u5e42\u7b49\uff0c\u91cd\u590d\u6d88\u606f\u5c31\u4f1a\u88ab\u5904\u7406\u4e24\u904d\u2014\u2014\u6bd4\u5982\u7ed9\u7528\u6237\u53d1\u4e24\u6b21\u4f18\u60e0\u5238<\/span><\/p>\n\n\n\n
    \n

    \u6d4b\u8bd5\u624b\u987a\uff1a<\/span><\/span><\/strong>\u5411\u961f\u5217\u53d1\u9001\u540c\u4e00\u6761\u6d88\u606f\u4e24\u6b21\uff08\u6216\u624b\u52a8\u91cd\u53d1\uff09\uff0c\u89c2\u5bdf\u6d88\u8d39\u8005\u662f\u5426\u53ea\u4ea7\u751f\u4e00\u6b21\u4e1a\u52a1\u6548\u679c\u3002\u5e38\u7528\u624b\u6bb5\u662f\u6d88\u8d39\u7aef\u7528”\u6d88\u606f\u552f\u4e00 ID + \u53bb\u91cd\u8868”\u62e6\u622a<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
    \n

    \u5bb9\u6613\u5ffd\u7565\u7684\u4e00\u70b9\uff1a<\/span><\/span><\/b>\u8fd9\u4e09\u7c7b\u573a\u666f\u7684<\/span><\/span>\u9a8c\u8bc1\u624b\u6cd5\u5176\u5b9e\u4e00\u81f4<\/span><\/span><\/strong>\u2014\u2014\u90fd\u662f”\u7528\u76f8\u540c\u7684\u4e1a\u52a1\u6807\u8bc6\u91cd\u590d\u63d0\u4ea4\uff0c\u770b\u7ed3\u679c\u662f\u5426\u53ea\u751f\u6548\u4e00\u6b21”\u3002\u533a\u522b\u5728\u4e8e\u89e6\u53d1\u65b9\u5f0f\u548c\u843d\u5728\u7cfb\u7edf\u7684\u54ea\u4e00\u73af\u3002\u6d4b\u8bd5\u8bbe\u8ba1\u65f6\u8981\u8ba9\u7528\u4f8b\u80fd\u8986\u76d6\u5230\u6bcf\u4e00\u73af\uff0c\u800c\u4e0d\u662f\u53ea\u5728\u63a5\u53e3\u5c42\u6253\u4e00\u53d1\u5c31\u5b8c\u4e8b<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \n

    \u4e09\u3001\u6d4b\u8bd5\u7528\u4f8b\u8bbe\u8ba1\uff1a\u5e42\u7b49\u6027\u8fb9\u754c\u573a\u666f\u5168\u8986\u76d6<\/span><\/h2>\n

    \u5230\u4e86\u7528\u4f8b\u8bbe\u8ba1\u73af\u8282\u3002\u5f88\u591a\u56e2\u961f\u5e42\u7b49\u6d4b\u8bd5\u53ea\u5199\u4e86”\u91cd\u590d\u63d0\u4ea4\u4e00\u6b21\uff0c\u671f\u671b\u4e0d\u91cd\u590d\u6263\u6b3e”\u8fd9\u4e00\u6761\uff0c\u8fd9\u663e\u7136\u4e0d\u591f\u3002\u5e42\u7b49\u7684\u8fb9\u754c\u573a\u666f\u975e\u5e38\u591a\uff0c\u6211\u6574\u7406\u6210\u4e86\u4e00\u4e2a\u77e9\u9635<\/span><\/p>\n

    \n
    \"\u5fae\u4fe1\u516c\u4f17\u53f7\u4e8c\u7ef4\u7801\"\u56fe\u7247\u5f15\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u626b\u7801\u5173\u6ce8\u9605\u8bfb\u539f\u6587<\/span><\/figcaption><\/figure>\n<\/section>\n
    \u5e42\u7b49\u6d4b\u8bd5\u7528\u4f8b\u77e9\u9635\uff1a3\u884c\u00d74\u5217\uff0c\u98ce\u9669\u7b49\u7ea7\u4e00\u76ee\u4e86\u7136<\/span><\/span><\/span><\/span><\/section>\n

    \u6211\u628a\u7528\u4f8b\u6309\u4e24\u4e2a\u7ef4\u5ea6\u5c55\u5f00\uff1a<\/span>\u6a2a\u5411\u662f\u89e6\u53d1\u65b9\u5f0f<\/span><\/strong>\uff08\u6b63\u5411\u6b63\u5e38\u3001\u8d85\u65f6\u540e\u91cd\u8bd5\u3001\u9ad8\u5e76\u53d1\u91cd\u590d\u3001\u5e42\u7b49\u952e\u51b2\u7a81\uff09\uff0c<\/span>\u7eb5\u5411\u662f\u4e1a\u52a1\u65f6\u673a<\/span><\/strong>\uff08\u5355\u8bf7\u6c42\u3001\u7b2c\u4e09\u65b9\u56de\u8c03\u5ef6\u8fdf\u3001\u5e42\u7b49\u952e\u8fc7\u671f\u540e\u91cd\u8bd5\uff09\u3002\u4ea4\u53c9\u51fa\u6765\u7684\u683c\u5b50\uff0c\u5c31\u662f\u6211\u4eec\u8be5\u5199\u7684\u7528\u4f8b\u3002\u4e0b\u9762\u7ed9\u4e00\u5f20\u53ef\u76f4\u63a5\u62ff\u53bb\u7528\u7684\u8be6\u7ec6\u8868<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n
    \n
    \u7528\u4f8b\u7f16\u53f7<\/span><\/span><\/section>\n<\/th>\n
    		\n
    \u573a\u666f<\/span><\/span><\/section>\n<\/th>\n
    		\n
    \u524d\u7f6e\u6761\u4ef6<\/span><\/span><\/section>\n<\/th>\n
    		\n
    \u64cd\u4f5c\u6b65\u9aa4<\/span><\/span><\/section>\n<\/th>\n
    		\n
    \u9884\u671f\u7ed3\u679c<\/span><\/span><\/section>\n<\/th>\n
    		\n
    \u65ad\u8a00\u70b9<\/span><\/span><\/section>\n<\/th>\n<\/tr>\n<\/thead>\n
    \n
    ID-01<\/span><\/section>\n<\/td>\n
    		\n
    \u6b63\u5411\u6b63\u5e38<\/span><\/section>\n<\/td>\n
    		\n
    \u8d26\u6237\u4f59\u989d\u5145\u8db3\uff0c\u5e42\u7b49\u952e\u9996\u6b21\u51fa\u73b0<\/span><\/section>\n<\/td>\n
    		\n
    \u53d1\u9001\u4e00\u6b21\u652f\u4ed8\u8bf7\u6c42<\/span><\/section>\n<\/td>\n
    		\n
    \u6263\u6b3e\u6210\u529f\uff0c\u8fd4\u56de\u660e\u786e\u7ed3\u679c<\/span><\/section>\n<\/td>\n
    		\n
    \u6d41\u6c34 1 \u7b14\uff1b\u4f59\u989d\u51cf\u5c11\u6b63\u786e<\/span><\/section>\n<\/td>\n<\/tr>\n
    \n
    ID-02<\/span><\/section>\n<\/td>\n
    		\n
    \u8d85\u65f6\u540e\u91cd\u8bd5<\/span><\/section>\n<\/td>\n
    		\n
    \u9996\u6b21\u8bf7\u6c42\u6838\u5fc3\u5df2\u5904\u7406\u4f46\u5ba2\u6237\u7aef\u5224\u8d85\u65f6<\/span><\/section>\n<\/td>\n
    		\n
    \u7528\u76f8\u540c\u5e42\u7b49\u952e\u91cd\u8bd5\u4e00\u6b21<\/span><\/section>\n<\/td>\n
    		\n
    \u8fd4\u56de”\u5df2\u5904\u7406”\uff0c\u4e0d\u4e8c\u6b21\u6263\u6b3e<\/span><\/section>\n<\/td>\n
    		\n
    \u6d41\u6c34\u4ecd\u4e3a 1 \u7b14\uff1b\u4f59\u989d\u4e0d\u53d8<\/span><\/section>\n<\/td>\n<\/tr>\n
    \n
    ID-03<\/span><\/section>\n<\/td>\n
    		\n
    \u9ad8\u5e76\u53d1\u91cd\u590d<\/span><\/section>\n<\/td>\n
    		\n
    \u540c\u4e00\u5e42\u7b49\u952e\u5e76\u53d1 10 \u6b21<\/span><\/section>\n<\/td>\n
    		\n
    \u5e76\u53d1\u6253 10 \u4e2a\u76f8\u540c\u8bf7\u6c42<\/span><\/section>\n<\/td>\n
    		\n
    \u4ec5 1 \u6b21\u751f\u6548\uff0c\u5176\u4f59\u8fd4\u56de\u91cd\u590d<\/span><\/section>\n<\/td>\n
    		\n
    \u6d41\u6c34 1 \u7b14\uff1b\u4f59\u989d\u6b63\u786e<\/span><\/section>\n<\/td>\n<\/tr>\n
    \n
    ID-04<\/span><\/section>\n<\/td>\n
    		\n
    \u5e42\u7b49\u952e\u51b2\u7a81<\/span><\/section>\n<\/td>\n
    		\n
    \u4e24\u4e2a\u4e0d\u540c\u4e1a\u52a1\u4f46\u952e\u751f\u6210\u89c4\u5219\u649e\u8f66<\/span><\/section>\n<\/td>\n
    		\n
    \u6784\u9020\u952e\u51b2\u7a81\u8bf7\u6c42<\/span><\/section>\n<\/td>\n
    		\n
    \u4e0d\u5e94\u4e92\u76f8\u8986\u76d6\uff0c\u5e94\u5206\u522b\u5904\u7406<\/span><\/section>\n<\/td>\n
    		\n
    \u4e24\u7b14\u4e1a\u52a1\u5404\u81ea\u72ec\u7acb\u843d\u5730<\/span><\/section>\n<\/td>\n<\/tr>\n
    \n
    ID-05<\/span><\/section>\n<\/td>\n
    		\n
    \u56de\u8c03\u5ef6\u8fdf<\/span><\/section>\n<\/td>\n
    		\n
    \u7b2c\u4e09\u65b9\u56de\u8c03\u665a\u5230\uff0c\u671f\u95f4\u7528\u6237\u91cd\u8bd5<\/span><\/section>\n<\/td>\n
    		\n
    \u5148\u91cd\u8bd5\u540e\u6536\u5230\u5ef6\u8fdf\u56de\u8c03<\/span><\/section>\n<\/td>\n
    		\n
    \u56de\u8c03\u91cd\u653e\u88ab\u5e42\u7b49\u62e6\u4f4f<\/span><\/section>\n<\/td>\n
    		\n
    \u4e0d\u91cd\u590d\u5165\u8d26<\/span><\/section>\n<\/td>\n<\/tr>\n
    \n
    ID-06<\/span><\/section>\n<\/td>\n
    		\n
    \u5e42\u7b49\u952e\u8fc7\u671f<\/span><\/section>\n<\/td>\n
    		\n
    \u952e TTL \u5230\u671f\u540e\u518d\u6b21\u540c\u4e1a\u52a1\u8bf7\u6c42<\/span><\/section>\n<\/td>\n
    		\n
    \u7b49\u952e\u8fc7\u671f\u518d\u53d1\u76f8\u540c\u8bf7\u6c42<\/span><\/section>\n<\/td>\n
    		\n
    \u89c6\u4e3a\u65b0\u8bf7\u6c42\uff0c\u6b63\u5e38\u5904\u7406<\/span><\/section>\n<\/td>\n
    		\n
    \u6d41\u6c34\u65b0\u589e 1 \u7b14\uff08\u5408\u7406\uff09<\/span><\/section>\n<\/td>\n<\/tr>\n
    \n
    ID-07<\/span><\/section>\n<\/td>\n
    		\n
    \u90e8\u5206\u5931\u8d25\u56de\u6eda<\/span><\/section>\n<\/td>\n
    		\n
    \u6263\u6b3e\u6210\u529f\u4f46\u5165\u8d26\u5931\u8d25<\/span><\/section>\n<\/td>\n
    		\n
    \u89e6\u53d1\u8865\u507f \/ \u51b2\u6b63<\/span><\/section>\n<\/td>\n
    		\n
    \u51b2\u6b63\u540e\u4f59\u989d\u6062\u590d\uff0c\u53ef\u91cd\u8bd5<\/span><\/section>\n<\/td>\n
    		\n
    \u4f59\u989d\u56de\u5230\u521d\u59cb\uff1b\u51b2\u6b63\u6d41\u6c34\u5b58\u5728<\/span><\/section>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u8fd9\u5f20\u8868\u6211\u7279\u610f\u628a”\u5e42\u7b49\u952e\u51b2\u7a81”\u548c”\u952e\u8fc7\u671f”\u4e24\u4e2a\u5bb9\u6613\u88ab\u6f0f\u6389\u7684\u8fb9\u754c\u4e5f\u5217\u8fdb\u53bb\u4e86\u3002\u8bb2\u4e24\u4e2a\u5bb9\u6613\u8e29\u7684\u7ec6\u8282\uff1a<\/span><\/p>\n

    \u5173\u4e8e\u5e42\u7b49\u952e\u51b2\u7a81\uff08ID-04\uff09<\/span><\/strong>
    <\/span><\/p>\n

    \u5e42\u7b49\u952e\u8981\u4fdd\u8bc1”\u4e1a\u52a1\u552f\u4e00”\uff0c\u4f46\u53c8\u4e0d\u80fd\u592a\u5bbd\u3002\u5982\u679c\u952e\u8bbe\u8ba1\u6210\u7eaf”\u7528\u6237 ID”\uff0c\u90a3\u8fd9\u4e2a\u7528\u6237\u7684\u6240\u6709\u4ea4\u6613\u90fd\u4f1a\u88ab\u5f53\u6210\u91cd\u590d\uff1b\u5982\u679c\u8bbe\u8ba1\u6210”\u8ba2\u5355\u53f7”\uff0c\u90a3\u8ba2\u5355\u53f7\u751f\u6210\u89c4\u5219\u4e00\u65e6\u6709\u7f3a\u9677\uff08\u6bd4\u5982\u4f9d\u8d56\u65f6\u95f4\u7cbe\u5ea6\u4e0d\u591f\uff09\uff0c\u5c31\u4f1a\u649e\u8f66\u3002\u6d4b\u8bd5\u65f6\u8981\u4e13\u95e8\u6784\u9020”\u4e0d\u540c\u4e1a\u52a1\u4f46\u952e\u76f8\u540c”\u7684 case\uff0c\u9a8c\u8bc1\u7cfb\u7edf\u662f\u6309\u4e1a\u52a1\u7ef4\u5ea6\u533a\u5206\uff0c\u800c\u4e0d\u662f\u4e00\u5200\u5207<\/span><\/p>\n

    \u5173\u4e8e\u952e\u8fc7\u671f\uff08ID-06\uff09<\/span><\/strong>
    <\/span><\/p>\n

    Redis \u91cc\u7684\u5e42\u7b49\u952e\u4e00\u822c\u8bbe TTL\uff08\u6bd4\u5982 5 \u5230 15 \u5206\u949f\uff09\u3002\u5982\u679c\u4e1a\u52a1\u672c\u8eab\u5904\u7406\u65f6\u95f4\u53ef\u80fd\u8d85\u8fc7 TTL\uff0c\u8fc7\u671f\u540e\u91cd\u590d\u8bf7\u6c42\u4f1a\u88ab\u5f53\u6210\u65b0\u8bf7\u6c42\u518d\u6263\u4e00\u6b21\u3002\u6d4b\u8bd5\u8981\u9a8c\u8bc1 TTL \u8bbe\u7f6e\u548c\u4e1a\u52a1\u8d85\u65f6\u662f\u5426\u5339\u914d\uff0c\u4ee5\u53ca\u8fc7\u671f\u540e\u7684\u884c\u4e3a\u662f\u5426\u7b26\u5408\u9884\u671f\uff08\u662f\u5141\u8bb8\u518d\u5904\u7406\uff0c\u8fd8\u662f\u62d2\u7edd\uff09<\/span><\/p>\n

    \u914d\u5957\u53ef\u8fd0\u884c\u4ee3\u7801\uff1aPython + Redis \u5e42\u7b49\u6d4b\u8bd5<\/span><\/h3>\n

    \u4e0b\u9762\u8fd9\u6bb5\u811a\u672c\u628a”\u5e42\u7b49\u952e\u751f\u6210 + \u8d85\u65f6\u6a21\u62df + \u5e76\u53d1\u6d4b\u8bd5”\u4e09\u4ef6\u4e8b\u90fd\u505a\u9f50\u4e86\uff0c\u521d\u5b66\u8005\u88c5\u597d redis-py \u5c31\u80fd\u76f4\u63a5\u8dd1\u3002\u6838\u5fc3\u662f\u7528 Redis \u7684 <\/span>SET key value NX EX 300<\/span><\/code> \u539f\u5b50\u64cd\u4f5c\uff0c\u4fdd\u8bc1”\u540c\u4e00\u5e42\u7b49\u952e\u53ea\u88ab\u9996\u4e2a\u8bf7\u6c42\u62a2\u5360”\uff0c\u5176\u4f59\u91cd\u590d\u8bf7\u6c42\u76f4\u63a5\u8fd4\u56de DUPLICATE\uff0c\u4e0d\u4e8c\u6b21\u6263\u6b3e<\/span><\/p>\n

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      import<\/span> redis<\/span><\/code>import<\/span> threading<\/span><\/code>import<\/span> time<\/span><\/code>r = redis.Redis(host='127.0.0.1'<\/span>, port=6379<\/span>, db=0<\/span>, decode_responses=True<\/span>)<\/span><\/code>def<\/span> build_idempotency_key<\/span>(user_id, order_id<\/span>):<\/span><\/code>    # \u5e42\u7b49\u952e\uff1a\u4e1a\u52a1\u7ef4\u5ea6\u552f\u4e00\uff0c\u7531 \u7528\u6237ID + \u8ba2\u5355ID \u7ec4\u6210<\/span><\/span><\/code>    return<\/span> \"idem:\"<\/span> + user_id + \":\"<\/span> + order_id<\/span><\/code>def<\/span> pay_once<\/span>(key, amount<\/span>):<\/span><\/code>    # SET NX EX \u2014\u2014 \u4e0d\u5b58\u5728\u624d\u5199\u5165\uff0c5\u5206\u949f\u8fc7\u671f\uff0c\u539f\u5b50\u64cd\u4f5c<\/span><\/span><\/code>    ok = r.set<\/span>(key, \"PROCESSING\"<\/span>, nx=True<\/span>, ex=300<\/span>)<\/span><\/code>    if<\/span> not<\/span> ok:<\/span><\/code>        return<\/span> \"DUPLICATE\"<\/span>   # \u5df2\u5b58\u5728 = \u91cd\u590d\u8bf7\u6c42\uff0c\u76f4\u63a5\u8fd4\u56de\uff0c\u4e0d\u4e8c\u6b21\u6263\u6b3e<\/span><\/span><\/code>    try<\/span>:<\/span><\/code>        time.sleep(0.05<\/span>)     # \u6a21\u62df\u6838\u5fc3\u6263\u6b3e\u903b\u8f91<\/span><\/span><\/code>        r.set<\/span>(key, \"SUCCESS\"<\/span>, xx=True<\/span>)<\/span><\/code>        return<\/span> \"SUCCESS\"<\/span><\/span><\/code>    except<\/span> Exception:<\/span><\/code>        r.delete(key)        # \u5931\u8d25\u6e05\u7406\uff0c\u5141\u8bb8\u5ba2\u6237\u7aef\u91cd\u8bd5<\/span><\/span><\/code>        return<\/span> \"FAILED\"<\/span><\/span><\/code>def<\/span> simulate_timeout_and_retry<\/span>(key, amount<\/span>):<\/span><\/code>    # \u9996\u6b21\u8bf7\u6c42\u8d85\u65f6\uff08\u672a\u8fd4\u56de\u7ed3\u679c\uff09\uff0c\u5ba2\u6237\u7aef\u7528\u76f8\u540c\u5e42\u7b49\u952e\u91cd\u8bd5<\/span><\/span><\/code>    r.set<\/span>(key, \"PROCESSING\"<\/span>, nx=True<\/span>, ex=300<\/span>)<\/span><\/code>    time.sleep(2<\/span>)            # \u6a21\u62df\u7f51\u7edc\u8d85\u65f6\u7a97\u53e3<\/span><\/span><\/code>    return<\/span> pay_once(key, amount)   # \u7b2c\u4e8c\u6b21\u5e94\u8bc6\u522b\u4e3a\u91cd\u590d<\/span><\/span><\/code>def<\/span> concurrent_test<\/span>(key, amount, threads=<\/span>10<\/span><\/span>):<\/span><\/code>    results = []<\/span><\/code>    lock = threading.Lock()<\/span><\/code>    def<\/span> worker<\/span>():<\/span><\/code>        res = pay_once(key, amount)<\/span><\/code>        with<\/span> lock:<\/span><\/code>            results.append(res)<\/span><\/code>    ts = [threading.Thread(target=worker) for<\/span> _ in<\/span> range<\/span>(threads)]<\/span><\/code>    for<\/span> t in<\/span> ts: t.start()<\/span><\/code>    for<\/span> t in<\/span> ts: t.join()<\/span><\/code>    return<\/span> results   # \u5e94\u53ea\u6709 1 \u4e2a SUCCESS\uff0c\u5176\u4f59 DUPLICATE<\/span><\/span><\/code>if<\/span> __name__ == \"__main__\"<\/span>:<\/span><\/code>    k = build_idempotency_key(\"u1001\"<\/span>, \"o20260816\"<\/span>)<\/span><\/code>    # \u7528\u4f8b1\uff1a\u5e76\u53d1\u91cd\u590d\u63d0\u4ea4\uff0c\u65ad\u8a00\u53ea\u6210\u529f 1 \u6b21<\/span><\/span><\/code>    print<\/span>(concurrent_test(k, 100.0<\/span>))<\/span><\/code>    # \u7528\u4f8b2\uff1a\u8d85\u65f6\u91cd\u8bd5\uff0c\u65ad\u8a00\u4e0d\u4e8c\u6b21\u6263\u6b3e<\/span><\/span><\/code>    print<\/span>(simulate_timeout_and_retry(\"k2\"<\/span>, 50.0<\/span>))<\/span><\/code><\/pre>\n<\/section>\n\n\n\n
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      \u65ad\u8a00\u539f\u5219\uff1a<\/span><\/b>\u5e42\u7b49\u7528\u4f8b\u7684\u6838\u5fc3\u65ad\u8a00\u53ea\u6709\u4e00\u53e5\u8bdd\u2014\u2014<\/span><\/span><\/span>“\u65e0\u8bba\u91cd\u590d\u63d0\u4ea4\u591a\u5c11\u6b21\uff0c\u8d26\u6237\u4f59\u989d\u53d8\u5316\u3001\u6d41\u6c34\u7b14\u6570\u3001\u4e1a\u52a1\u72b6\u6001\uff0c\u90fd\u5fc5\u987b\u548c\u53ea\u63d0\u4ea4\u4e00\u6b21\u5b8c\u5168\u4e00\u6837”<\/span><\/span><\/em>\u3002\u628a\u8fd9\u53e5\u8bdd\u53d8\u6210 SQL \u65ad\u8a00\uff0c\u5c31\u80fd\u81ea\u52a8\u5316<\/span><\/span><\/span><\/section>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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      \u56db\u3001\u6570\u636e\u4e00\u81f4\u6027\uff1a\u94f6\u884c\u6838\u5fc3 4 \u8868\u4e00\u81f4\u6027\u9a8c\u8bc1<\/span><\/h2>\n
      \u8bb2\u5b8c\u5e42\u7b49\uff0c\u8fdb\u5165\u66f4\u786c\u6838\u7684\u4e00\u5757\uff1a\u6570\u636e\u4e00\u81f4\u6027\u3002\u5e42\u7b49\u4fdd\u8bc1”\u4e0d\u91cd\u590d\u5904\u7406”\uff0c\u4e00\u81f4\u6027\u4fdd\u8bc1”\u8d26\u7b97\u5f97\u5e73”\u3002\u94f6\u884c\u6838\u5fc3\u91cc\uff0c\u6709\u56db\u5f20\u8868\u662f\u8d44\u91d1\u51c6\u786e\u6027\u7684\u547d\u6839\u5b50\uff0c\u5b83\u4eec\u5fc5\u987b\u59cb\u7ec8\u4fdd\u6301\u4e00\u81f4<\/span><\/p>\n
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      \"\u5fae\u4fe1\u516c\u4f17\u53f7\u4e8c\u7ef4\u7801\"\u56fe\u7247\u5f15\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u626b\u7801\u5173\u6ce8\u9605\u8bfb\u539f\u6587<\/span><\/figcaption><\/figure>\n<\/section>\n
      \u8868\u4e00\u81f4\u6027\u67b6\u6784\uff1a\u8d26\u52a1\u8868 \/ \u6d41\u6c34\u8868 \/ \u4f59\u989d\u8868 \/ \u5bf9\u8d26\u8868\u7684\u52fe\u7a3d\u5173\u7cfb<\/span><\/span><\/span><\/span><\/section>\n
      \u56db\u5f20\u8868\u5404\u81ea\u7684\u804c\u8d23<\/span><\/span><\/p>\n
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      • \u8d26\u52a1\u8868\uff08t_account\uff09\uff1a<\/span><\/strong>
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        \u8bb0\u5f55\u6bcf\u4e00\u7b14\u4f1a\u8ba1\u5206\u5f55\uff08\u501f\u3001\u8d37\uff09\uff0c\u662f”\u53d1\u751f\u4e86\u4ec0\u4e48”\u7684\u6e90\u5934\u3002<\/span><\/section>\n<\/li>\n
      • \u6d41\u6c34\u8868\uff08t_journal\uff09\uff1a<\/span><\/strong>
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        \u8bb0\u5f55\u4ea4\u6613\u6d41\u6c34\uff0c\u4e00\u7b14\u4e1a\u52a1\u5bf9\u5e94\u4e00\u7b14\u6216\u591a\u7b14\u6d41\u6c34\uff0c\u662f”\u9010\u7b14\u75d5\u8ff9”\u3002<\/span><\/section>\n<\/li>\n
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        \u8bb0\u5f55\u6bcf\u4e2a\u8d26\u6237\u5f53\u524d\u4f59\u989d\uff0c\u662f”\u73b0\u5728\u5269\u591a\u5c11”\u7684\u5feb\u7167\u3002<\/span><\/section>\n<\/li>\n
      • \u5bf9\u8d26\u8868\uff08t_recon\uff09\uff1a<\/span><\/strong>
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        \u8bb0\u5f55\u5185\u5916\u90e8\u5bf9\u8d26\u7ed3\u679c\uff0c\u7528\u6765\u53d1\u73b0\u5e76\u89e3\u91ca\u5dee\u5f02\u3002<\/span><\/section>\n

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        \u5b83\u4eec\u4e4b\u95f4\u7684\u52fe\u7a3d\u5173\u7cfb\u5fc5\u987b\u6210\u7acb\uff1a<\/span>\u6d41\u6c34\u8868\u7684\u603b\u501f\u8d37\u53d1\u751f\u989d\uff0c\u5fc5\u987b\u548c\u4f59\u989d\u8868\u7684\u53d8\u52a8\u4e00\u81f4\uff1b\u8d26\u52a1\u8868\u7684\u501f\u8d37\u5fc5\u987b\u5e73\u8861\uff1b\u5bf9\u8d26\u8868\u8981\u80fd\u89e3\u91ca\u6bcf\u4e00\u7b14\u672a\u5e73\u5dee\u5f02<\/span><\/strong>\u3002\u4e0b\u9762\u6211\u7ed9\u51fa\u53ef\u76f4\u63a5\u5efa\u8868\u548c\u6821\u9a8c\u7684 SQL<\/span><\/p>\n
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          -- \u8d26\u52a1\u8868\uff1a\u6bcf\u7b14\u4f1a\u8ba1\u5206\u5f55<\/span><\/span><\/code>CREATE TABLE<\/span> t_account (<\/span><\/code>  id          BIGINT<\/span> PRIMARY KEY<\/span> AUTO_INCREMENT,<\/span><\/code>  biz_no      VARCHAR<\/span>(64<\/span>)  NOT NULL<\/span> COMMENT '\u4e1a\u52a1\u6d41\u6c34\u53f7(\u5e42\u7b49\u952e)'<\/span>,<\/span><\/code>  acct_no     VARCHAR<\/span>(32<\/span>)  NOT NULL<\/span> COMMENT '\u8d26\u6237\u53f7'<\/span>,<\/span><\/code>  dr_amount   DECIMAL<\/span>(18<\/span>,2<\/span>) DEFAULT<\/span> 0<\/span> COMMENT '\u501f\u65b9\u91d1\u989d'<\/span>,<\/span><\/code>  cr_amount   DECIMAL<\/span>(18<\/span>,2<\/span>) DEFAULT<\/span> 0<\/span> COMMENT '\u8d37\u65b9\u91d1\u989d'<\/span>,<\/span><\/code>  create_time DATETIME NOT NULL<\/span><\/span><\/code>) COMMENT=<\/span>'\u8d26\u52a1\u8868'<\/span>;<\/span><\/code>-- \u6d41\u6c34\u8868\uff1a\u9010\u7b14\u4ea4\u6613\u75d5\u8ff9<\/span><\/span><\/code>CREATE TABLE<\/span> t_journal (<\/span><\/code>  id          BIGINT<\/span> PRIMARY KEY<\/span> AUTO_INCREMENT,<\/span><\/code>  biz_no      VARCHAR<\/span>(64<\/span>)  NOT NULL<\/span>,<\/span><\/code>  acct_no     VARCHAR<\/span>(32<\/span>)  NOT NULL<\/span>,<\/span><\/code>  amount      DECIMAL<\/span>(18<\/span>,2<\/span>) NOT NULL<\/span> COMMENT '\u4ea4\u6613\u91d1\u989d'<\/span>,<\/span><\/code>  direction   CHAR<\/span>(1<\/span>)    NOT NULL<\/span> COMMENT 'D\u501f\u65b9 C\u8d37\u65b9'<\/span>,<\/span><\/code>  create_time DATETIME NOT NULL<\/span><\/span><\/code>) COMMENT=<\/span>'\u6d41\u6c34\u8868'<\/span>;<\/span><\/code>-- \u4f59\u989d\u8868\uff1a\u8d26\u6237\u5f53\u524d\u4f59\u989d<\/span><\/span><\/code>CREATE TABLE<\/span> t_balance (<\/span><\/code>  acct_no     VARCHAR<\/span>(32<\/span>) PRIMARY KEY<\/span>,<\/span><\/code>  balance     DECIMAL<\/span>(18<\/span>,2<\/span>) NOT NULL<\/span> DEFAULT<\/span> 0<\/span>,<\/span><\/code>  update_time DATETIME NOT NULL<\/span><\/span><\/code>) COMMENT=<\/span>'\u4f59\u989d\u8868'<\/span>;<\/span><\/code>-- \u5bf9\u8d26\u8868\uff1a\u8bb0\u5f55\u672a\u5e73\u5dee\u5f02<\/span><\/span><\/code>CREATE TABLE<\/span> t_recon (<\/span><\/code>  id          BIGINT<\/span> PRIMARY KEY<\/span> AUTO_INCREMENT,<\/span><\/code>  biz_no      VARCHAR<\/span>(64<\/span>),<\/span><\/code>  diff_amount DECIMAL<\/span>(18<\/span>,2<\/span>),<\/span><\/code>  status      CHAR<\/span>(1<\/span>) COMMENT '0\u672a\u5e73 1\u5df2\u5e73'<\/span>,<\/span><\/code>  create_time DATETIME<\/span><\/code>) COMMENT=<\/span>'\u5bf9\u8d26\u8868'<\/span>;<\/span><\/code><\/pre>\n<\/section>\n
          \u4e00\u81f4\u6027\u6821\u9a8c\u811a\u672c<\/span><\/h3>\n
          \u4e0b\u9762\u8fd9\u6bb5 SQL \u662f\u6d4b\u8bd5\u540c\u5b66\u53ef\u4ee5\u6bcf\u5929\u8dd1\u3001\u6bcf\u6b21\u53d1\u7248\u8dd1\u7684”\u4f53\u68c0\u811a\u672c”\u3002\u5b83\u68c0\u67e5\u4e09\u7c7b\u4e0d\u4e00\u81f4\uff1a\u501f\u8d37\u4e0d\u5e73\u8861\u3001\u4f59\u989d\u4e0e\u6d41\u6c34\u5bf9\u4e0d\u4e0a\u3001\u5b58\u5728\u672a\u89e3\u91ca\u7684\u5dee\u5f02<\/span><\/p>\n
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            -- \u6821\u9a8c1\uff1a\u8d26\u52a1\u8868\u501f\u8d37\u662f\u5426\u5e73\u8861\uff08\u6bcf\u4e2a biz_no \u501f\u8d37\u5e94\u76f8\u7b49\uff09<\/span><\/span><\/code>SELECT<\/span> biz_no,<\/span><\/code>       SUM<\/span>(dr_amount) AS<\/span> total_dr,<\/span><\/code>       SUM<\/span>(cr_amount) AS<\/span> total_cr<\/span><\/code>FROM<\/span> t_account<\/span><\/code>GROUP<\/span> BY<\/span> biz_no<\/span><\/code>HAVING<\/span> ABS<\/span>(SUM<\/span>(dr_amount) -<\/span> SUM<\/span>(cr_amount)) ><\/span> 0.005<\/span>;<\/span><\/code>-- \u8fd4\u56de\u7a7a\u7ed3\u679c = \u501f\u8d37\u5e73\u8861\uff1b\u6709\u884c = \u5b58\u5728\u4e0d\u5e73\u8861<\/span><\/span><\/code>-- \u6821\u9a8c2\uff1a\u4f59\u989d\u8868\u7684\u53d8\u52a8\u662f\u5426\u7b49\u4e8e\u6d41\u6c34\u7684\u501f\u8d37\u51c0\u989d<\/span><\/span><\/code>SELECT<\/span> j.acct_no,<\/span><\/code>       b.balance                                          AS<\/span> cur_balance,<\/span><\/code>       (SELECT<\/span> SUM<\/span>(CASE<\/span> WHEN<\/span> direction=<\/span>'C'<\/span> THEN<\/span> amount ELSE<\/span> -<\/span>amount END<\/span>)<\/span><\/code>          FROM<\/span> t_journal j2 WHERE<\/span> j2.acct_no =<\/span> j.acct_no) AS<\/span> net_flow<\/span><\/code>FROM<\/span> t_journal j<\/span><\/code>JOIN<\/span> t_balance b ON<\/span> b.acct_no =<\/span> j.acct_no<\/span><\/code>GROUP<\/span> BY<\/span> j.acct_no, b.balance<\/span><\/code>HAVING<\/span> ABS<\/span>(b.balance -<\/span> (<\/span><\/code>    SELECT<\/span> SUM<\/span>(CASE<\/span> WHEN<\/span> direction=<\/span>'C'<\/span> THEN<\/span> amount ELSE<\/span> -<\/span>amount END<\/span>)<\/span><\/code>    FROM<\/span> t_journal j3 WHERE<\/span> j3.acct_no =<\/span> j.acct_no)) ><\/span> 0.005<\/span>;<\/span><\/code>-- \u8fd4\u56de\u7a7a = \u4f59\u989d\u4e0e\u6d41\u6c34\u4e00\u81f4<\/span><\/span><\/code>-- \u6821\u9a8c3\uff1a\u5bf9\u8d26\u8868\u4e2d\u4ecd\u5b58\u5728\u672a\u5e73\u5dee\u5f02\u7684\u8bb0\u5f55<\/span><\/span><\/code>SELECT<\/span> *<\/span> FROM<\/span> t_recon WHERE<\/span> status =<\/span> '0'<\/span>;<\/span><\/code>-- \u8fd4\u56de\u7a7a = \u65e0\u672a\u5e73\u5dee\u5f02\uff1b\u6709\u884c = \u9700\u4eba\u5de5\u5e72\u9884<\/span><\/span><\/code>-- \u6821\u9a8c4\uff1a\u5e42\u7b49\u6027\u5bf9\u8d26\u2014\u2014\u540c\u4e00 biz_no \u4e0d\u5e94\u51fa\u73b0\u591a\u7b14\"\u5df2\u751f\u6548\"\u6d41\u6c34<\/span><\/span><\/code>SELECT<\/span> biz_no, COUNT<\/span>(*<\/span>) cnt<\/span><\/code>FROM<\/span> t_journal<\/span><\/code>GROUP<\/span> BY<\/span> biz_no<\/span><\/code>HAVING<\/span> COUNT<\/span>(*<\/span>) ><\/span> 1<\/span>;<\/span><\/code>-- \u8fd4\u56de\u7a7a = \u65e0\u91cd\u590d\u751f\u6548\uff1b\u6709\u884c = \u5e42\u7b49\u53ef\u80fd\u5931\u6548\uff0c\u6392\u67e5<\/span><\/span><\/code><\/pre>\n<\/section>\n\n\n\n
            \n
            \u8e29\u5751\u63d0\u9192\uff1a<\/span><\/b>\u91d1\u989d\u6bd4\u8f83\u5343\u4e07\u522b\u7528”=”\u76f4\u63a5\u6bd4\u6d6e\u70b9\u3002DECIMAL \u4e4b\u95f4\u6bd4\u6ca1\u95ee\u9898\uff0c\u4f46\u5982\u679c\u4f60\u5728\u811a\u672c\u91cc\u7528\u5e94\u7528\u5c42\u6d6e\u70b9\u7b97\u5b8c\u518d\u56de\u5199\uff0c\u4f1a\u56e0\u7cbe\u5ea6\u4ea7\u751f 0.01 \u7684”\u5e7d\u7075\u5dee\u5f02”\u3002\u6821\u9a8c\u811a\u672c\u91cc\u6211\u7edf\u4e00\u7528\u4e86 <\/span><\/span><\/span>ABS(\u5dee) > 0.005<\/span><\/span><\/code> \u7684\u5bb9\u5dee\u5199\u6cd5\uff0c\u8fd9\u662f\u94f6\u884c\u5bf9\u8d26\u7684\u5e38\u89c4\u505a\u6cd5<\/span><\/span><\/span><\/section>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            \u628a\u8fd9\u56db\u6bb5 SQL \u5c01\u88c5\u6210\u5b9a\u65f6\u4efb\u52a1\uff08\u6bd4\u5982\u6bcf\u5929\u51cc\u6668\u8dd1\u5168\u91cf\uff0c\u4ea4\u6613\u9ad8\u5cf0\u671f\u8dd1\u62bd\u6837\uff09\uff0c\u4e00\u65e6\u6709\u8fd4\u56de\u884c\u5c31\u544a\u8b66\u3002\u8fd9\u6bd4”\u9760\u4eba\u8089\u7ffb\u8d26”\u9760\u8c31\u5f97\u591a\uff0c\u4e5f\u662f\u5728\u6bcf\u6b21\u7248\u672c\u53d1\u5e03\u524d\u5fc5\u8dd1\u7684\u56de\u5f52\u9879<\/span><\/span><\/span><\/section>\n
            \n
            \u4e94\u3001\u5206\u5e03\u5f0f\u4e8b\u52a1\u4e00\u81f4\u6027\u6d4b\u8bd5\uff1aTCC \u6a21\u5f0f\u4e0e Saga \u6a21\u5f0f<\/span><\/h2>\n
            \u94f6\u884c\u6838\u5fc3\u73b0\u5728\u666e\u904d\u5fae\u670d\u52a1\u5316\uff0c\u4e00\u7b14”\u8de8\u884c\u8f6c\u8d26”\u53ef\u80fd\u8981\u8c03\u7528\u8d26\u6237\u670d\u52a1\u3001\u6e05\u7ed3\u7b97\u670d\u52a1\u3001\u901a\u77e5\u670d\u52a1\u3002\u8fd9\u65f6\u5019\u5355\u5e93\u4e8b\u52a1\u4e0d\u591f\u7528\u4e86\uff0c\u5c31\u5f97\u4e0a\u5206\u5e03\u5f0f\u4e8b\u52a1\u3002\u4e24\u79cd\u4e3b\u6d41\u8865\u507f\u65b9\u6848\u662f <\/span>TCC<\/span><\/strong> \u548c <\/span>Saga<\/span><\/strong>\uff0c\u6d4b\u8bd5\u7b56\u7565\u4e5f\u622a\u7136\u4e0d\u540c<\/span><\/p>\n
            \n
            \"\u5fae\u4fe1\u516c\u4f17\u53f7\u4e8c\u7ef4\u7801\"\u56fe\u7247\u5f15\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u626b\u7801\u5173\u6ce8\u9605\u8bfb\u539f\u6587<\/span><\/figcaption><\/figure>\n<\/section>\n
            TCC\uff08Try\/Confirm\/Cancel\uff09\u4e0e Saga\uff08\u6b63\u5411\u94fe + \u53cd\u5411\u8865\u507f\uff09\u6d41\u7a0b\u5bf9\u6bd4<\/span><\/span><\/span><\/span><\/section>\n
            TCC \u6a21\u5f0f<\/span><\/span><\/h3>\n
            TCC \u628a\u6bcf\u4e2a\u64cd\u4f5c\u62c6\u6210\u4e09\u9636\u6bb5\uff1a<\/span>Try<\/span><\/strong>\uff08\u9884\u7559\/\u51bb\u7ed3\u8d44\u6e90\uff0c\u6bd4\u5982\u5148\u51bb\u7ed3\u8d26\u6237\u91cc\u7684\u94b1\uff09\u3001<\/span>Confirm<\/span><\/strong>\uff08\u771f\u6b63\u63d0\u4ea4\uff0c\u6263\u6389\u51bb\u7ed3\u7684\u94b1\uff09\u3001<\/span>Cancel<\/span><\/strong>\uff08\u91ca\u653e\uff0c\u628a\u94b1\u89e3\u51bb\u56de\u53bb\uff09\u3002\u5b83\u7684\u7279\u70b9\u662f”\u5148\u5360\u5751\u518d\u7ed3\u7b97”\uff0c\u6240\u4ee5\u80fd\u4fdd\u8bc1\u8f83\u5f3a\u7684\u4e00\u81f4\u6027\uff0c\u9002\u5408\u77ed\u4e8b\u52a1\u3001\u8d44\u91d1\u654f\u611f\u573a\u666f<\/span><\/p>\n\n\n\n
            \n
            \u6d4b\u8bd5\u7b56\u7565\uff1a<\/span><\/span><\/strong>
            <\/span><\/p>\n
            \u2460Confirm \u5fc5\u987b\u5728 Try \u6210\u529f\u4e4b\u540e\u624d\u80fd\u6267\u884c\uff0cTry \u6ca1\u6210\u529f\u5c31 Confirm \u5e94\u88ab\u62d2\u7edd\uff1b<\/span><\/span><\/p>\n
            \u2461Cancel \u8981\u80fd\u5b8c\u6574\u56de\u6eda Try \u7684\u51bb\u7ed3\uff1b<\/span><\/span><\/p>\n
            \u2462\u7f51\u7edc\u5206\u533a\u4e0b\uff0cConfirm\/Cancel \u8981\u80fd\u5e42\u7b49\u91cd\u8bd5\uff08\u8865\u507f\u64cd\u4f5c\u672c\u8eab\u4e5f\u8981\u5e42\u7b49\uff01\uff09<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            Saga \u6a21\u5f0f<\/span><\/h3>\n
            Saga \u628a\u957f\u4e8b\u52a1\u62c6\u6210\u4e00\u4e32\u672c\u5730\u4e8b\u52a1 T1\u2192T2\u2192T3\uff0c\u4efb\u4f55\u4e00\u4e2a\u5931\u8d25\uff0c\u5c31\u6309\u76f8\u53cd\u987a\u5e8f\u6267\u884c\u8865\u507f C1\u3001C2\u2026\u2026\u5b83\u662f“\u7ec8\u6001\u4e00\u81f4”<\/span>\uff0c\u9002\u5408\u8de8\u591a\u4e2a\u670d\u52a1\u7684\u957f\u6d41\u7a0b\uff08\u6bd4\u5982”\u8f6c\u8d26+\u53d1\u77ed\u4fe1+\u8bb0\u79ef\u5206”\uff09<\/span><\/p>\n\n\n\n
            \n
            \u6d4b\u8bd5\u7b56\u7565\uff1a<\/span><\/strong>\u91cd\u70b9\u6d4b\u8865\u507f\u94fe\u7684\u6b63\u786e\u6027\u2014\u2014T2 \u5931\u8d25\u65f6\uff0cC1 \u5fc5\u987b\u88ab\u6b63\u786e\u89e6\u53d1\u4e14\u4ec5\u89e6\u53d1\u4e00\u6b21\uff1b\u8865\u507f\u672c\u8eab\u4e5f\u8981\u5e42\u7b49\uff1b\u8fd8\u8981\u6d4b”\u8865\u507f\u8fc7\u7a0b\u4e2d\u53c8\u5931\u8d25”\u7684\u4e8c\u6b21\u8865\u507f\u3002Saga \u7684\u5751\u5728\u4e8e\u8865\u507f\u987a\u5e8f\u548c\u8865\u507f\u5931\u8d25\uff0c\u6d4b\u8bd5\u7528\u4f8b\u8981\u8986\u76d6”\u6b63\u5411\u5230\u54ea\u4e00\u6b65\u65ad\u3001\u5c31\u4ece\u54ea\u4e00\u6b65\u53cd\u5411\u8865”<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
            \n
            \u4e24\u79cd\u6a21\u5f0f\u600e\u4e48\u9009\u6765\u6d4b\uff1a<\/span><\/span><\/b>TCC \u770b”\u51bb\u7ed3\u2192\u63d0\u4ea4\/\u91ca\u653e”\u662f\u5426\u4e25\u4e1d\u5408\u7f1d\uff1bSaga \u770b”\u6b63\u5411\u94fe\u65ad\u5728\u54ea\u3001\u8865\u507f\u94fe\u662f\u5426\u95ed\u73af”\u3002\u65e0\u8bba\u54ea\u79cd\uff0c<\/span><\/span>\u8865\u507f\u64cd\u4f5c\u672c\u8eab\u5fc5\u987b\u5e42\u7b49<\/span><\/span><\/em>\uff0c\u5426\u5219\u4f1a\u51fa\u73b0”\u4e3a\u4e86\u56de\u6eda\u53c8\u591a\u6263\u4e00\u6b21”\u7684\u4e8c\u6b21\u4e8b\u6545<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            TCC \u6a21\u5f0f\u6d4b\u8bd5 Python \u793a\u4f8b<\/span><\/h3>\n
            \u4e0b\u9762\u8fd9\u6bb5\u6a21\u62df TCC \u7684 Try\/Confirm\/Cancel\uff0c\u5e76\u9a8c\u8bc1”Confirm \u5728 Try \u672a\u6210\u529f\u65f6\u5e94\u88ab\u62d2\u7edd”\u4ee5\u53ca”Cancel \u5e42\u7b49\u53ef\u91cd\u590d\u8c03\u7528”<\/span><\/p>\n
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            • <\/li>\n
            • <\/li>\n<\/ul>\n
              import<\/span> threading<\/span><\/code># \u7528\u5b57\u5178\u6a21\u62df\u8d26\u6237\u4e0e\u51bb\u7ed3\u72b6\u6001\uff08\u751f\u4ea7\u7528\u6570\u636e\u5e93+\u5206\u5e03\u5f0f\u9501\uff09<\/span><\/span><\/code>class<\/span> TccTransfer<\/span>:<\/span><\/code>    def<\/span> __init__<\/span>(self<\/span>):<\/span><\/code>        self<\/span>.balance = {\"A\"<\/span>: 1000.0<\/span>, \"B\"<\/span>: 0.0<\/span>}<\/span><\/code>        self<\/span>.frozen  = {}          # biz_no -> \u51bb\u7ed3\u91d1\u989d<\/span><\/span><\/code>        self<\/span>.confirmed = set<\/span>()     # \u5df2\u786e\u8ba4\u7684\u5e42\u7b49\u952e<\/span><\/span><\/code>        self<\/span>.lock = threading.Lock()<\/span><\/code>    def<\/span> try_lock<\/span>(self, biz_no, payer, amount<\/span>):<\/span><\/code>        with<\/span> self<\/span>.lock:<\/span><\/code>            if<\/span> biz_no in<\/span> self<\/span>.frozen:<\/span><\/code>                return<\/span> \"DUPLICATE_TRY\"<\/span>   # \u5e42\u7b49\uff1a\u91cd\u590d Try \u76f4\u63a5\u8fd4\u56de<\/span><\/span><\/code>            if<\/span> self<\/span>.balance[payer] < amount:<\/span><\/code>                return<\/span> \"INSUFFICIENT\"<\/span><\/span><\/code>            self<\/span>.balance[payer] -= amount<\/span><\/code>            self<\/span>.frozen[biz_no] = amount<\/span><\/code>            return<\/span> \"TRY_OK\"<\/span><\/span><\/code>    def<\/span> confirm<\/span>(self, biz_no, payer, payee, amount<\/span>):<\/span><\/code>        with<\/span> self<\/span>.lock:<\/span><\/code>            if<\/span> biz_no not<\/span> in<\/span> self<\/span>.frozen:<\/span><\/code>                return<\/span> \"REJECT_NO_TRY\"<\/span>  # Try \u672a\u6210\u529f\uff0c\u62d2\u7edd Confirm<\/span><\/span><\/code>            if<\/span> biz_no in<\/span> self<\/span>.confirmed:<\/span><\/code>                return<\/span> \"DUPLICATE_CONFIRM\"<\/span>  # \u5e42\u7b49<\/span><\/span><\/code>            self<\/span>.balance[payee] += amount<\/span><\/code>            self<\/span>.frozen.pop(biz_no, 0<\/span>)<\/span><\/code>            self<\/span>.confirmed.add(biz_no)<\/span><\/code>            return<\/span> \"CONFIRM_OK\"<\/span><\/span><\/code>    def<\/span> cancel<\/span>(self, biz_no, payer, amount<\/span>):<\/span><\/code>        with<\/span> self<\/span>.lock:<\/span><\/code>            if<\/span> biz_no not<\/span> in<\/span> self<\/span>.frozen:<\/span><\/code>                return<\/span> \"NO_NEED\"<\/span>      # \u6ca1\u51bb\u7ed3\u5c31\u65e0\u9700\u91ca\u653e<\/span><\/span><\/code>            self<\/span>.balance[payer] += self<\/span>.frozen.pop(biz_no, 0<\/span>)  # \u5e42\u7b49\uff1a\u591a\u6b21\u8c03\u7528\u7ed3\u679c\u4e00\u81f4<\/span><\/span><\/code>            return<\/span> \"CANCEL_OK\"<\/span><\/span><\/code># ===== \u6d4b\u8bd5\u5f00\u59cb =====<\/span><\/span><\/code>if<\/span> __name__ == \"__main__\"<\/span>:<\/span><\/code>    t = TccTransfer()<\/span><\/code>    bn = \"biz_20260816_001\"<\/span><\/span><\/code>    # \u7528\u4f8b1\uff1aTry \u6210\u529f\u540e\u518d Confirm<\/span><\/span><\/code>    print<\/span>(t.try_lock(bn, \"A\"<\/span>, 200.0<\/span>))   # TRY_OK<\/span><\/span><\/code>    print<\/span>(t.confirm(bn, \"A\"<\/span>, \"B\"<\/span>, 200.0<\/span>)) # CONFIRM_OK<\/span><\/span><\/code>    print<\/span>(t.confirm(bn, \"A\"<\/span>, \"B\"<\/span>, 200.0<\/span>)) # DUPLICATE_CONFIRM\uff08\u5e42\u7b49\uff09<\/span><\/span><\/code>    # \u7528\u4f8b2\uff1a\u672a Try \u76f4\u63a5 Confirm\uff0c\u5e94\u88ab\u62d2\u7edd<\/span><\/span><\/code>    t2 = TccTransfer()<\/span><\/code>    print<\/span>(t2.confirm(\"no_try\"<\/span>, \"A\"<\/span>, \"B\"<\/span>, 50.0<\/span>))  # REJECT_NO_TRY<\/span><\/span><\/code>    # \u7528\u4f8b3\uff1aCancel \u5e42\u7b49\uff0c\u8c03\u4e24\u6b21\u7ed3\u679c\u4e00\u81f4<\/span><\/span><\/code>    t3 = TccTransfer()<\/span><\/code>    t3.try_lock(\"biz_x\"<\/span>, \"A\"<\/span>, 100.0<\/span>)<\/span><\/code>    print<\/span>(t3.cancel(\"biz_x\"<\/span>, \"A\"<\/span>, 100.0<\/span>))  # CANCEL_OK<\/span><\/span><\/code>    print<\/span>(t3.cancel(\"biz_x\"<\/span>, \"A\"<\/span>, 100.0<\/span>))  # NO_NEED\uff08\u5df2\u91ca\u653e\uff09<\/span><\/span><\/code>    print<\/span>(\"A\u4f59\u989d=\"<\/span>, t3.balance[\"A\"<\/span>])        # \u5e94\u4e3a 1000.0\uff0c\u94b1\u56de\u6765\u4e86<\/span><\/span><\/code><\/pre>\n<\/section>\n
              \n
              \u516d\u3001\u5b9e\u6218\u8bb2\u89e3\uff1a\u67d0\u652f\u4ed8\u7cfb\u7edf\u91cd\u590d\u4e0b\u5355\u6545\u969c\u7684\u5168\u94fe\u8def\u590d\u76d8<\/span><\/h2>\n
              \u56de\u5230\u5f00\u5934\u90a3\u4e2a”\u88ab\u6263\u4e24\u6b21\u94b1”\u7684\u6545\u969c\u3002\u8fd9\u4e00\u8282\u6211\u628a\u5b83\u5b8c\u6574\u590d\u76d8\u4e00\u904d\uff0c\u4ece\u6839\u56e0\u3001\u590d\u73b0\u3001\u4fee\u590d\u5230\u9a8c\u8bc1\uff0c\u5e26\u4f60\u8d70\u4e00\u904d\u771f\u5b9e\u6d4b\u8bd5\u8be5\u600e\u4e48\u505a<\/span><\/p>\n
              \n
              \"\u5fae\u4fe1\u516c\u4f17\u53f7\u4e8c\u7ef4\u7801\"\u56fe\u7247\u5f15\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u626b\u7801\u5173\u6ce8\u9605\u8bfb\u539f\u6587<\/span><\/figcaption><\/figure>\n<\/section>\n
              \u6545\u969c\u590d\u76d8\u65f6\u5e8f\uff1a\u524d\u7aef\u65e0\u9632\u6296 + \u5e42\u7b49\u952e\u5199\u5165\u4f4d\u7f6e\u9519\u8bef = \u91cd\u590d\u6263\u6b3e<\/span><\/span><\/span><\/span><\/section>\n
              \u6545\u969c\u6839\u56e0<\/span><\/h3>\n
              \u6839\u56e0\u6709\u4e24\u4e2a\uff0c\u53e0\u5728\u4e00\u8d77\u624d\u51fa\u4e8b\uff1a<\/span><\/p>\n
                \n
              • \u524d\u7aef\u65e0\u9632\u6296\uff1a<\/span><\/strong>
                \n
                \u8fd8\u6b3e\u6309\u94ae\u5728\u8bf7\u6c42\u8fd4\u56de\u524d\u6ca1\u6709\u7f6e\u7070\uff0c\u7528\u6237\u8fde\u70b9\u4ea7\u751f\u4e24\u4e2a\u76f8\u540c\u4e1a\u52a1\u8bf7\u6c42<\/span><\/section>\n<\/li>\n
              • \u6838\u5fc3\u672a\u7528\u5e42\u7b49\u952e\u62e6\u622a\uff1a<\/span><\/strong>
                \n
                \u6838\u5fc3\u7cfb\u7edf\u9760”\u8ba2\u5355\u72b6\u6001”\u5224\u65ad\uff0c\u4f46\u4e24\u4e2a\u8bf7\u6c42\u51e0\u4e4e\u540c\u65f6\u5230\u8fbe\uff0c\u90fd\u8bfb\u5230”\u5f85\u652f\u4ed8”\uff0c\u4e8e\u662f\u90fd\u5f80\u4e0b\u8d70\u6263\u6b3e\u903b\u8f91\u3002\u5e42\u7b49\u952e\u672c\u5e94\u5728 Redis \u7528 <\/span>SET NX<\/span><\/code> \u7acb\u523b\u62e6\u4f4f\u7b2c\u4e8c\u4e2a\uff0c\u4f46\u5f53\u65f6\u7684\u5b9e\u73b0\u91cc\u5e42\u7b49\u952e\u662f\u5728”\u6263\u6b3e\u6210\u529f\u540e”\u624d\u5199\uff0c\u7b49\u4e8e\u95e8\u662f\u4e8b\u540e\u624d\u5173\u7684<\/span><\/section>\n<\/li>\n<\/ul>\n\n\n\n
                \n
                \u6839\u56e0\uff1a<\/span><\/span><\/b>\u5e42\u7b49\u6821\u9a8c\u7684\u4f4d\u7f6e\u9519\u4e86\u2014\u2014\u5b83\u53d1\u751f\u5728”\u6263\u6b3e\u4e4b\u540e”\u800c\u4e0d\u662f”\u6263\u6b3e\u4e4b\u524d”\u3002\u4efb\u4f55\u628a\u5e42\u7b49\u5f53\u6210”\u4e8b\u540e\u8865\u4e01”\u7684\u8bbe\u8ba1\uff0c\u5728\u5e76\u53d1\u9762\u524d\u90fd\u4f1a\u6f0f<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
                \u6d4b\u8bd5\u590d\u73b0<\/span><\/h3>\n
                \u6211\u4eec\u7528\u6587\u7ae0\u5f00\u5934\u7684 Redis \u5e76\u53d1\u4ee3\u7801\u590d\u73b0\u4e86\u5b83\uff1a<\/span>\u540c\u4e00\u4e2a\u5e42\u7b49\u952e\uff0c10 \u4e2a\u7ebf\u7a0b\u540c\u65f6\u6253\uff0c\u671f\u671b\u53ea\u6709 1 \u4e2a SUCCESS\u3002\u5728\u65e7\u5b9e\u73b0\u91cc\uff0c\u56e0\u4e3a\u952e\u662f\u4e8b\u540e\u5199\uff0c\u51fa\u73b0\u4e86 2 \u5230 3 \u4e2a SUCCESS\u2014\u2014\u590d\u73b0\u6210\u529f\uff0c\u95ee\u9898\u5750\u5b9e<\/span><\/span><\/p>\n
                \u4fee\u590d\u65b9\u6848<\/span><\/h3>\n
                  \n
                1. \u524d\u7aef\uff1a<\/span><\/strong>
                  \n
                  \u70b9\u51fb\u540e\u7acb\u5373\u7f6e\u7070\u6309\u94ae\uff0c\u8bf7\u6c42\u7ed3\u675f\uff08\u6210\u529f\u6216\u5931\u8d25\uff09\u624d\u6062\u590d\uff0c\u5e76\u52a0 1 \u79d2\u9632\u6296<\/span><\/section>\n<\/li>\n
                2. \u6838\u5fc3\uff1a<\/span><\/strong>
                  \n
                  \u628a\u5e42\u7b49\u952e\u6821\u9a8c\u63d0\u524d\u5230”\u6263\u6b3e\u903b\u8f91\u4e4b\u524d”\uff0c\u7528 <\/span>SET key value NX EX 300<\/span><\/code> \u539f\u5b50\u64cd\u4f5c\u3002\u53ea\u6709\u62a2\u5230\u9501\u7684\u90a3\u4e2a\u8bf7\u6c42\u7ee7\u7eed\u6263\u6b3e\uff0c\u5176\u4f59\u76f4\u63a5\u8fd4\u56de”\u5df2\u53d7\u7406\/\u91cd\u590d\u8bf7\u6c42”<\/span><\/section>\n<\/li>\n<\/ol>\n
                  \u9a8c\u8bc1\u7528\u4f8b<\/span><\/h3>\n
                  \u4fee\u590d\u540e\u6211\u4eec\u8865\u4e86\u4e09\u7ec4\u9a8c\u8bc1\uff1a<\/span><\/p>\n
                    \n
                  • \u5e76\u53d1\u9a8c\u8bc1\uff1a<\/span><\/strong>
                    \n
                    \u540c\u952e 10 \u5e76\u53d1\uff0c\u65ad\u8a00\u6070\u597d 1 \u4e2a SUCCESS\uff0c9 \u4e2a DUPLICATE\uff0c\u4f59\u989d\u53ea\u51cf\u4e00\u6b21<\/span><\/section>\n<\/li>\n
                  • \u8d85\u65f6\u91cd\u8bd5\u9a8c\u8bc1\uff1a<\/span><\/strong>
                    \n
                    \u9996\u6b21\u5904\u7406\u5b8c\u4f46\u5ba2\u6237\u7aef\u5224\u8d85\u65f6\uff0c\u7528\u540c\u952e\u91cd\u8bd5\uff0c\u65ad\u8a00\u4e0d\u4e8c\u6b21\u6263\u6b3e<\/span><\/section>\n<\/li>\n
                  • \u5bf9\u8d26\u9a8c\u8bc1\uff1a<\/span><\/strong>
                    \n
                    \u8dd1\u7b2c\u56db\u8282\u7684”\u6821\u9a8c4\uff08\u540c biz_no \u4e0d\u5e94\u591a\u7b14\u751f\u6548\u6d41\u6c34\uff09”\uff0c\u65ad\u8a00\u8fd4\u56de\u7a7a<\/span><\/section>\n<\/li>\n<\/ul>\n\n\n\n
                    \n
                    \u590d\u76d8\u7ed3\u8bba\uff1a<\/span><\/span><\/b>\u8fd9\u6b21\u6545\u969c\u4e0d\u662f”\u529f\u80fd\u6ca1\u505a”\uff0c\u800c\u662f”\u5f02\u5e38\u6ca1\u6d4b”\u3002\u6211\u4eec\u7684\u7528\u4f8b\u5e93\u540e\u6765\u628a”\u5e76\u53d1\u91cd\u590d + \u5e42\u7b49\u952e\u4f4d\u7f6e”\u4f5c\u4e3a\u652f\u4ed8\u7c7b\u63a5\u53e3\u7684\u5fc5\u6d4b\u9879\uff0c\u6bcf\u6b21\u53d1\u7248\u81ea\u52a8\u56de\u5f52\u3002\u94b1\u7684\u4e8b\uff0c\u5b81\u53ef\u591a\u6d4b\u5341\u904d\uff0c\u4e0d\u80fd\u6f0f\u6389\u4e00\u56de<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
                    \n
                    \u4e03\u3001\u94f6\u884c\u6d4b\u8bd5\u5de5\u7a0b\u5e08\u5fc5\u77e5\u7684 4 \u7c7b\u8e29\u5751\u6848\u4f8b<\/span><\/h2>\n
                    \u4e0b\u9762\u56db\u7c7b\uff0c\u662f\u94f6\u884c\u6d4b\u8bd5\u91cc\u5bb9\u6613\u7ffb\u8f66\u7684\u5730\u65b9\uff0c\u6bcf\u4e00\u7c7b\u6211\u90fd\u914d\u4e86\u5bf9\u7167\uff0c\u4f5c\u4e3a\u68c0\u67e5\u6e05\u5355\u7528<\/span><\/p>\n
                    \n
                    \"\u5fae\u4fe1\u516c\u4f17\u53f7\u4e8c\u7ef4\u7801\"\u56fe\u7247\u5f15\u81ea\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u626b\u7801\u5173\u6ce8\u9605\u8bfb\u539f\u6587<\/span><\/figcaption><\/figure>\n<\/section>\n
                     4 \u7c7b\u9ad8\u9891\u8e29\u5751\uff1a\u91cd\u590d\u4e0b\u5355 \/ \u4f59\u989d\u8d85\u9650 \/ \u51b2\u6b63\u5931\u8d25 \/ \u5bf9\u8d26\u4e0d\u5e73<\/span><\/span><\/span><\/span><\/section>\n
                    \u5751\u4e00\uff1a\u91cd\u590d\u4e0b\u5355<\/span><\/h3>\n
                    \u5982\u4e0a\u6240\u8ff0\uff0c\u524d\u7aef\u9632\u6296\u7f3a\u5931 + \u5e42\u7b49\u952e\u6821\u9a8c\u4f4d\u7f6e\u9519\u8bef\u3002\u5bf9\u7b56\u662f\u628a\u5e42\u7b49\u952e\u6821<\/span>\u9a8c<\/span>\u524d\u7f6e<\/span><\/strong>\u5230\u4e1a\u52a1\u6d41\u7a0b\u5f00\u5934\uff0c\u7528 Redis \u539f\u5b50\u64cd\u4f5c\u62a2\u5360<\/span><\/p>\n
                    \u5751\u4e8c\uff1a\u4f59\u989d\u6263\u51cf\u8d85\u9650<\/span><\/h3>\n
                    \u8d26\u6237\u4f59\u989d\u6263\u51cf\u5982\u679c\u53ea\u5728\u5e94\u7528\u5c42\u5224\u65ad”\u4f59\u989d\u591f\u4e0d\u591f”\uff0c\u5e76\u53d1\u4e0b\u4f1a\u8d85\u5356\u2014\u2014\u4e24\u4e2a\u8bf7\u6c42\u90fd\u8bfb\u5230”\u4f59\u989d 100″\uff0c\u90fd\u6263 80\uff0c\u7ed3\u679c\u53d8\u8d1f\u3002\u5bf9\u7b56\u662f\u6570\u636e\u5e93\u5c42\u7528<\/span>\u884c\u9501<\/span><\/strong>\u6216<\/span>UPDATE ... SET balance = balance - 80 WHERE balance >= 80<\/span><\/code>\u8fd9\u79cd\u5e26\u6761\u4ef6\u7684\u539f\u5b50\u66f4\u65b0\uff0c\u8ba9\u6570\u636e\u5e93\u4fdd\u8bc1\u4e0d\u8d85\u6263<\/span><\/p>\n
                    \n
                      \n
                    • <\/li>\n
                    • <\/li>\n
                    • <\/li>\n
                    • <\/li>\n
                    • <\/li>\n
                    • <\/li>\n
                    • <\/li>\n<\/ul>\n
                      -- \u6b63\u786e\u7684\u4f59\u989d\u6263\u51cf\uff1a\u6761\u4ef6\u66f4\u65b0\uff0c\u6570\u636e\u5e93\u4fdd\u8bc1\u539f\u5b50\u6027<\/span><\/span><\/code>UPDATE<\/span> t_balance<\/span><\/code>   SET<\/span> balance =<\/span> balance -<\/span> 80.00<\/span>,<\/span><\/code>       update_time =<\/span> NOW()<\/span><\/code> WHERE<\/span> acct_no =<\/span> 'A'<\/span><\/span><\/code>   AND<\/span> balance >=<\/span> 80.00<\/span>;<\/span><\/code>-- \u8fd4\u56de\u5f71\u54cd\u884c\u6570=1 \u624d\u8868\u793a\u6263\u6b3e\u6210\u529f\uff1b=0 \u8868\u793a\u4f59\u989d\u4e0d\u8db3\uff0c\u7edd\u4e0d\u8d85\u6263<\/span><\/span><\/code><\/pre>\n<\/section>\n
                      \u5751\u4e09\uff1a\u51b2\u6b63\u5931\u8d25<\/span><\/h3>\n
                      \u4ea4\u6613\u5931\u8d25\u540e\u8981\u505a\u51b2\u6b63\uff08\u628a\u94b1\u9000\u56de\uff09\u3002\u5982\u679c\u51b2\u6b63\u672c\u8eab\u6ca1\u505a\u5e42\u7b49\uff0c\u91cd\u8bd5\u51b2\u6b63\u65f6\u53ef\u80fd\u9000\u4e24\u6b21\u3002\u5bf9\u7b56\u662f\u51b2\u6b63\u4e5f\u8981\u5e26\u81ea\u5df1\u7684\u5e42\u7b49\u952e\uff0c\u4e14\u51b2\u6b63\u5931\u8d25\u8981\u8fdb\u5bf9\u8d26\u8868\u7b49\u5f85\u4eba\u5de5\/\u81ea\u52a8\u4e8c\u6b21\u5904\u7406\uff0c\u4e0d\u80fd\u9759\u9ed8\u4e22<\/span><\/p>\n
                      \u5751\u56db\uff1a\u5bf9\u8d26\u4e0d\u5e73<\/span><\/h3>\n
                      \u65e5\u7ec8\u5bf9\u8d26\u53d1\u73b0”\u6838\u5fc3\u8d26\u548c\u6e20\u9053\u8d26\u5dee\u51e0\u6bdb\u94b1”\u3002\u5e38\u89c1\u539f\u56e0\u662f\uff1a\u6f0f\u8bb0\u67d0\u7b14\u624b\u7eed\u8d39\u3001\u7cbe\u5ea6\u5904\u7406\u4e0d\u4e00\u81f4\u3001\u6216\u8005\u67d0\u7b14\u6d41\u6c34\u72b6\u6001\u673a\u8df3\u53d8\u6ca1\u8bb0\u5168\u3002\u5bf9\u7b56\u662f\u5efa\u7acb”\u7b2c\u56db\u8282\u90a3\u5957\u6821\u9a8c\u811a\u672c”\u505a\u5e38\u6001\u5316\u4f53\u68c0\uff0c\u5e76\u4e14\u5bf9\u8d26\u5dee\u5f02\u5fc5\u987b\u7559\u75d5\u5230 <\/span>t_recon<\/span><\/code>\uff0c\u4e0d\u5141\u8bb8\u65e0\u89e3\u91ca\u5730\u62b9\u5e73<\/span><\/p>\n\n\n\n
                      \n
                      \u603b\u7ed3\uff1a<\/span><\/span><\/b>\u8fd9\u56db\u7c7b\u5751\uff0c\u672c\u8d28\u90fd\u662f\u540c\u4e00\u53e5\u8bdd\u2014\u2014<\/span><\/span>“\u5728\u5f02\u5e38\u3001\u5e76\u53d1\u3001\u91cd\u8bd5\u3001\u8865\u507f\u8fd9\u4e9b\u6df7\u4e71\u573a\u666f\u4e0b\uff0c\u94b1\u548c\u8d26\u8fd8\u80fd\u4e0d\u80fd\u7b97\u5e73”<\/span><\/span><\/em>\u3002\u628a\u5e42\u7b49\u548c\u4e00\u81f4\u6027\u6d4b\u5230\u4f4d\uff0c\u8fd9\u56db\u7c7b\u5751\u81f3\u5c11\u80fd\u6321\u6389\u516b\u6210<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
                      <\/mp-style-type><\/p>\n","protected":false},"excerpt":{"rendered":"
                      \u4ece\u4e00\u6b21”\u88ab\u6263\u4e24\u6b21\u94b1”\u7684\u771f\u5b9e\u6545\u969c\u8bf4\u8d77\u2014\u2014\u624b\u628a\u624b\u6559\u4f60\u628a\u5e42\u7b49\u548c\u4e00\u81f4\u6027\u6d4b\u900f\u3001\u6d4b\u5168\u3002 \u5148\u8bb2\u4e2a\u771f\u4e8b […]<\/p>\n","protected":false},"author":3,"featured_media":76,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-77","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-title-tutorial"],"_links":{"self":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/comments?post=77"}],"version-history":[{"count":2,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts\/77\/revisions"}],"predecessor-version":[{"id":190,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/posts\/77\/revisions\/190"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/media\/76"}],"wp:attachment":[{"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/media?parent=77"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/categories?post=77"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deartester.com\/index.php\/wp-json\/wp\/v2\/tags?post=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}