{"id":113947,"date":"2026-10-08T00:09:12","date_gmt":"2026-10-07T16:09:12","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/113947.html"},"modified":"2026-10-08T00:09:12","modified_gmt":"2026-10-07T16:09:12","slug":"%e7%bd%91%e7%bb%9c%e9%87%8d%e8%af%95%e5%af%bc%e8%87%b4%e9%87%8d%e5%a4%8d%e4%b8%8b%e5%8d%95%e6%80%8e%e4%b9%88%e5%8a%9e%ef%bc%9fclientrequestid-%e4%b8%8e%e6%95%b0%e6%8d%ae%e5%ba%93%e5%94%af%e4%b8%80","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/113947.html","title":{"rendered":"\u7f51\u7edc\u91cd\u8bd5\u5bfc\u81f4\u91cd\u590d\u4e0b\u5355\u600e\u4e48\u529e\uff1fclientRequestId \u4e0e\u6570\u636e\u5e93\u552f\u4e00\u952e\u53cc\u4fdd\u9669"},"content":{"rendered":"

\u7f51\u7edc\u91cd\u8bd5\u5bfc\u81f4\u91cd\u590d\u4e0b\u5355\u600e\u4e48\u529e？clientRequestId \u4e0e\u6570\u636e\u5e93\u552f\u4e00\u952e\u53cc\u4fdd\u9669<\/h2>\n

\u9879\u76ee：OrderSystem Cloud（\u5fae\u670d\u52a1\u7248\u4f01\u4e1a\u8ba2\u5355\u4ea4\u6613\u7cfb\u7edf） \u573a\u666f：\u7528\u6237\u5728 App \u4e0a\u70b9\u300c\u63d0\u4ea4\u8ba2\u5355\u300d，\u7f51\u7edc\u5361\u4f4f\u8f6c\u5708，\u7528\u6237\u53c8\u70b9\u4e86\u4e00\u6b21；\u6216\u8005\u7f51\u5173\u8d85\u65f6\u91cd\u53d1 \u95ee\u9898：\u540c\u4e00\u4e2a\u8d2d\u4e70\u610f\u56fe，\u843d\u4e86\u4e24\u5f20\u8ba2\u5355，\u6263\u4e86\u4e24\u6b21\u5e93\u5b58，\u6263\u4e86\u4e24\u6b21\u94b1<\/p>\n

\u4e0a\u4e00\u7bc7\u8bb2\u7684\u662f\u300cFeign \u91cd\u8bd5\u5bfc\u81f4\u91cd\u590d\u6263\u5e93\u5b58\u300d，\u90a3\u662f\u670d\u52a1\u95f4\u8c03\u7528\u7684\u5e42\u7b49\u3002\u8fd9\u4e00\u7bc7\u8bb2\u5b83\u7684\u4e0a\u6e38\u2014\u2014\u8ba2\u5355\u521b\u5efa\u5165\u53e3\u7684\u5e42\u7b49\u3002\u8fd9\u4e24\u5c42\u662f\u72ec\u7acb\u7684：\u5373\u4f7f\u5e93\u5b58\u4fa7\u505a\u5230\u4e86\u5b8c\u7f8e\u7684\u5e42\u7b49，\u4e0b\u5355\u5165\u53e3\u6ca1\u505a，\u7167\u6837\u4f1a\u751f\u6210\u4e24\u5f20\u8ba2\u5355\u53f7\u4e0d\u540c\u3001\u6263\u51cf\u8bb0\u5f55\u4e5f\u4e0d\u540c\u7684\u8ba2\u5355，\u4e24\u8fb9\u90fd\u300c\u5408\u6cd5\u300d，\u6700\u540e\u5c31\u662f\u5b9e\u6253\u5b9e\u7684\u91cd\u590d\u8ba2\u5355\u3002<\/p>\n

\u4e00\u3001\u4e1a\u52a1\u80cc\u666f：\u91cd\u590d\u4e0b\u5355\u53d1\u751f\u5728\u54ea\u4e00\u5c42<\/h3>\n

1.1 \u4e09\u79cd\u91cd\u590d\u4e0b\u5355\u7684\u6765\u6e90<\/h4>\n\n\u6765\u6e90\u8868\u73b0\u670d\u52a1\u7aef\u80fd\u770b\u5230\u4ec0\u4e48<\/tr>\n\n\n\n\n
\u7528\u6237\u624b\u6296\u8fde\u70b9<\/td>\n\u77ed\u65f6\u95f4\u5185\u4e24\u4e2a\u5b8c\u5168\u76f8\u540c\u7684\u4e0b\u5355\u8bf7\u6c42<\/td>\n\u4e24\u4e2a\u72ec\u7acb HTTP \u8bf7\u6c42<\/td>\n<\/tr>\n
\u5ba2\u6237\u7aef\u8d85\u65f6\u91cd\u8bd5<\/td>\nApp \u6ca1\u7b49\u5230\u54cd\u5e94，\u81ea\u52a8\u91cd\u53d1<\/td>\n\u4e24\u4e2a\u72ec\u7acb HTTP \u8bf7\u6c42<\/td>\n<\/tr>\n
\u7f51\u5173 \/ \u8d1f\u8f7d\u5747\u8861\u91cd\u53d1<\/td>\n\u4e0a\u6e38\u8d85\u65f6\u540e\u91cd\u8bd5<\/td>\n\u4e24\u4e2a\u72ec\u7acb HTTP \u8bf7\u6c42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5171\u540c\u70b9：\u670d\u52a1\u7aef\u6536\u5230\u7684\u90fd\u662f\u4e24\u4e2a\u300c\u957f\u5f97\u4e00\u6a21\u4e00\u6837\u300d\u7684\u8bf7\u6c42，\u6ca1\u6709\u4efb\u4f55\u534f\u8bae\u5c42\u7684\u6807\u8bb0\u80fd\u533a\u5206\u5b83\u4eec\u3002 HTTP \u672c\u8eab\u6ca1\u6709\u5e42\u7b49\u8bed\u4e49，POST \u4e5f\u4e0d\u4fdd\u8bc1\u53ea\u6267\u884c\u4e00\u6b21\u3002<\/p>\n

1.2 \u4e3a\u4ec0\u4e48\u4e0d\u80fd\u9760\u300c\u67e5\u91cd\u300d\u89e3\u51b3<\/h4>\n

\u6700\u6734\u7d20\u7684\u60f3\u6cd5\u662f：\u4e0b\u5355\u524d\u67e5\u4e00\u4e0b\u300c\u8fd9\u4e2a\u7528\u6237\u6700\u8fd1\u6709\u6ca1\u6709\u4e70\u8fc7\u540c\u6837\u7684\u5546\u54c1\u300d，\u6709\u5c31\u8fd4\u56de\u65e7\u8ba2\u5355\u3002\u8fd9\u4e2a\u601d\u8def\u6709\u4e09\u4e2a\u81f4\u547d\u95ee\u9898：<\/p>\n

  • \u7528\u6237\u771f\u7684\u53ef\u80fd\u8fde\u4e70\u4e24\u6b21\u540c\u6837\u7684\u5546\u54c1（\u6bd4\u5982\u4e70\u4e24\u7bb1\u6c34，\u5206\u4e24\u5355\u4e0b），\u67e5\u91cd\u4f1a\u8bef\u6740\u5408\u6cd5\u8bf7\u6c42；<\/li>\n
  • \u6ca1\u6709\u53ef\u9760\u7684\u5224\u5b9a\u6761\u4ef6\u3002\u9760\u300c\u7528\u6237 + \u5546\u54c1 + \u65f6\u95f4\u7a97\u53e3\u300d\u5224\u5b9a，\u7a97\u53e3\u5f00\u5927\u4e86\u8bef\u6740，\u5f00\u5c0f\u4e86\u6321\u4e0d\u4f4f；<\/li>\n
  • \u5e76\u53d1\u4e0b\u5fc5\u7136\u5931\u6548\u3002\u300c\u67e5\u4e0d\u5230 \u2192 \u63d2\u5165\u300d\u662f\u8bfb\u6539\u5199\u4e09\u6b65，\u4e24\u4e2a\u5e76\u53d1\u8bf7\u6c42\u4f1a\u540c\u65f6\u67e5\u4e0d\u5230\u7136\u540e\u540c\u65f6\u63d2\u5165\u3002<\/li>\n

    \u771f\u6b63\u7684\u95ee\u9898\u662f：\u670d\u52a1\u7aef\u7f3a\u5c11\u4e00\u4e2a\u80fd\u552f\u4e00\u6807\u8bc6\u300c\u8fd9\u4e00\u6b21\u7528\u6237\u610f\u56fe\u300d\u7684\u6807\u8bc6\u3002 \u8fd9\u4e2a\u6807\u8bc6\u5fc5\u987b\u7531\u53d1\u8d77\u65b9\u5728\u53d1\u8d77\u4e4b\u524d\u751f\u6210，\u5e76\u4e14\u5728\u91cd\u8bd5\u65f6\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n

    \u8fd9\u5c31\u662f clientRequestId（\u5ba2\u6237\u7aef\u5e42\u7b49\u952e）\u3002<\/p>\n

    \u4e8c\u3001clientRequestId：\u8c01\u751f\u6210\u3001\u4ec0\u4e48\u65f6\u5019\u751f\u6210\u3001\u600e\u4e48\u4f20<\/h3>\n

    2.1 \u6838\u5fc3\u539f\u5219：\u4e00\u6b21\u7528\u6237\u610f\u56fe\u4e00\u4e2a\u952e<\/h4>\n

    \u8fd9\u662f\u6574\u4e2a\u65b9\u6848\u91cc\u6700\u5bb9\u6613\u505a\u9519\u7684\u4e00\u70b9：<\/p>\n

    \u274c \u9519\u8bef\u505a\u6cd5：\u6bcf\u6b21 HTTP \u8bf7\u6c42\u53d1\u9001\u524d\u751f\u6210\u4e00\u4e2a\u65b0\u7684 UUID\u3002 \u2705 \u6b63\u786e\u505a\u6cd5：\u7528\u6237\u70b9\u51fb\u300c\u63d0\u4ea4\u8ba2\u5355\u300d\u8fd9\u4e2a\u52a8\u4f5c\u53d1\u751f\u7684\u90a3\u4e00\u523b\u751f\u6210\u4e00\u4e2a UUID，\u7136\u540e\u8fd9\u4e2a\u952e\u8d2f\u7a7f\u8be5\u610f\u56fe\u7684\u6240\u6709\u91cd\u8bd5\u3002<\/p>\n

    \u7528\u6237\u70b9\u51fb\u300c\u63d0\u4ea4\u8ba2\u5355\u300d
    \n \u2502
    \n \u251c\u2500\u2500 \u751f\u6210 clientRequestId =<\/span> "a3f8c1e2-…"<\/span> \u2190 \u53ea\u751f\u6210\u4e00\u6b21
    \n \u2502
    \n \u251c\u2500\u2500 \u7b2c 1<\/span> \u6b21\u8bf7\u6c42（\u8d85\u65f6，\u6ca1\u6536\u5230\u54cd\u5e94）
    \n \u251c\u2500\u2500 \u7b2c 2<\/span> \u6b21\u8bf7\u6c42（\u590d\u7528\u540c\u4e00\u4e2a clientRequestId）
    \n \u2514\u2500\u2500 \u7b2c 3<\/span> \u6b21\u8bf7\u6c42（\u590d\u7528\u540c\u4e00\u4e2a clientRequestId）
    \n \u2502
    \n \u25bc
    \n \u670d\u52a1\u7aef：\u4e09\u6b21\u8bf7\u6c42 \u2192 \u540c\u4e00\u5f20\u8ba2\u5355<\/p>\n

    \u5982\u679c\u6bcf\u6b21\u8bf7\u6c42\u90fd\u65b0\u751f\u6210\u952e，\u90a3\u670d\u52a1\u7aef\u6536\u5230\u7684\u4e09\u4e2a\u8bf7\u6c42\u5c31\u6709\u4e09\u4e2a\u4e0d\u540c\u7684\u952e，\u5e42\u7b49\u673a\u5236\u5b8c\u5168\u5931\u6548\u2014\u2014\u5e42\u7b49\u952e\u5931\u6548\u5f80\u5f80\u4e0d\u662f\u670d\u52a1\u7aef\u5b9e\u73b0\u9519\u4e86，\u800c\u662f\u5ba2\u6237\u7aef\u751f\u6210\u65f6\u673a\u9519\u4e86\u3002<\/p>\n

    \u4e0b\u9762\u662f\u300c\u4e00\u6b21\u7528\u6237\u610f\u56fe\u4e00\u4e2a\u952e\u300d\u7684\u5b8c\u6574\u751f\u547d\u5468\u671f\u6d41\u7a0b\u56fe：<\/p>\n

    \u6e32\u67d3\u9519\u8bef: Mermaid \u6e32\u67d3\u5931\u8d25: Lexical error on line 10. Unrecognized text.
    \n…\u4e0b\u6b21\u4e0b\u5355\u91cd\u65b0\u751f\u6210"]\u952e\u7684\u751f\u547d\u5468\u671f\u5e94\u8be5\u662f：**\u8fdb\u5165\u4e0b\u5355\u9875 \/ \u70b9\u51fb\u63d0\u4ea4\u65f6\u751f\u6210 \u2192
    \n———————-^<\/p>\n

    \u4e3a\u4ec0\u4e48\u8bbe\u8ba1\u6210\u53ef\u9009\u800c\u4e0d\u662f\u5fc5\u586b？ \u517c\u5bb9\u6027\u3002\u8001\u7248\u672c App \u4e0d\u4f1a\u4f20\u8fd9\u4e2a\u5b57\u6bb5，\u5982\u679c\u505a\u6210\u5fc5\u586b，\u5347\u7ea7\u670d\u52a1\u7aef\u5c31\u7b49\u4e8e\u8ba9\u6240\u6709\u8001\u5ba2\u6237\u7aef\u4e0b\u5355\u5931\u8d25\u3002<\/p>\n

    \u8fd9\u5c31\u5e26\u51fa\u4e00\u4e2a MySQL \u7684\u5173\u952e\u7279\u6027：\u552f\u4e00\u7d22\u5f15\u5141\u8bb8\u591a\u4e2a NULL \u503c\u3002\u6240\u4ee5\u300c\u4e0d\u4f20 key\u300d\u7684\u8001\u5ba2\u6237\u7aef\u53ef\u4ee5\u4e00\u76f4\u63d2\u5165 NULL，\u5f7c\u6b64\u4e0d\u51b2\u7a81；\u300c\u4f20\u4e86 key\u300d\u7684\u65b0\u5ba2\u6237\u7aef\u4eab\u53d7\u5e42\u7b49\u4fdd\u62a4\u3002<\/p>\n

    CREATE<\/span> TABLE<\/span> t_order (<\/span>
    \n id BIGINT<\/span> NOT<\/span> NULL<\/span> AUTO_INCREMENT<\/span>,<\/span>
    \n order_no VARCHAR<\/span>(<\/span>32<\/span>)<\/span> NOT<\/span> NULL<\/span> COMMENT<\/span> '\u96ea\u82b1ID + \u57fa\u56e0\u6cd5，\u5168\u5c40\u552f\u4e00'<\/span>,<\/span>
    \n user_id BIGINT<\/span> NOT<\/span> NULL<\/span> COMMENT<\/span> '\u4e0b\u5355\u7528\u6237'<\/span>,<\/span>
    \n client_request_id VARCHAR<\/span>(<\/span>64<\/span>)<\/span> DEFAULT<\/span> NULL<\/span> COMMENT<\/span> '\u5ba2\u6237\u7aef\u5e42\u7b49\u952e，\u53ef\u4e3a\u7a7a'<\/span>,<\/span>
    \n status<\/span> VARCHAR<\/span>(<\/span>16<\/span>)<\/span> NOT<\/span> NULL<\/span> COMMENT<\/span> 'WAIT_PAY \/ PAID \/ CANCELLED'<\/span>,<\/span>
    \n total_amount DECIMAL<\/span>(<\/span>12<\/span>,<\/span>2<\/span>)<\/span> NOT<\/span> NULL<\/span>,<\/span>
    \n create_time DATETIME<\/span> NOT<\/span> NULL<\/span> DEFAULT<\/span> CURRENT_TIMESTAMP<\/span>,<\/span>
    \n PRIMARY<\/span> KEY<\/span> (<\/span>id)<\/span>,<\/span>
    \n UNIQUE<\/span> KEY<\/span> uk_order_no (<\/span>order_no)<\/span>,<\/span>
    \n UNIQUE<\/span> KEY<\/span> uk_client_request_id (<\/span>client_request_id)<\/span>,<\/span> — \u2605 \u6700\u7ec8\u95f8\u95e8<\/span>
    \n KEY<\/span> idx_user_id (<\/span>user_id)<\/span>,<\/span>
    \n KEY<\/span> idx_status (<\/span>status<\/span>)<\/span>
    \n)<\/span> ENGINE<\/span>=<\/span>InnoDB<\/span> DEFAULT<\/span> CHARSET<\/span>=<\/span>utf8mb4;<\/span><\/p>\n

    \u26a0\ufe0f \u5982\u679c\u4f60\u7684\u6570\u636e\u5e93\u662f PostgreSQL \/ Oracle，\u591a\u4e2a NULL \u7684\u8bed\u4e49\u4e0d\u540c（Oracle \u540c\u6837\u5141\u8bb8\u591a\u4e2a NULL；SQL Server \u4e5f\u53ea\u5141\u8bb8\u4e00\u4e2a NULL），\u8fc1\u79fb\u524d\u8981\u9a8c\u8bc1\u3002MySQL \/ InnoDB \u7684\u884c\u4e3a\u662f\u300c\u552f\u4e00\u7d22\u5f15\u4e2d\u7684 NULL \u4e92\u4e0d\u76f8\u7b49\u300d，\u6240\u4ee5\u53ef\u4ee5\u6709\u4efb\u610f\u591a\u884c client_request_id IS NULL\u3002<\/p>\n

    2.3 \u4e3a\u4ec0\u4e48\u4e0d\u7528\u8ba2\u5355\u53f7\u5f53\u5e42\u7b49\u952e<\/h4>\n

    order_no \u662f\u670d\u52a1\u7aef\u751f\u6210\u7684（\u96ea\u82b1\u7b97\u6cd5），\u5ba2\u6237\u7aef\u5728\u53d1\u8bf7\u6c42\u4e4b\u524d\u6839\u672c\u4e0d\u77e5\u9053\u8fd9\u4e00\u5355\u7684\u8ba2\u5355\u53f7\u662f\u591a\u5c11\u3002\u5e42\u7b49\u952e\u5fc5\u987b\u5728\u8bf7\u6c42\u53d1\u51fa\u524d\u5c31\u5b58\u5728，\u6240\u4ee5\u53ea\u80fd\u7531\u5ba2\u6237\u7aef\u751f\u6210\u3002<\/p>\n

    \u4e24\u8005\u7684\u5206\u5de5\u662f：<\/p>\n\n\u952e\u8c01\u751f\u6210\u751f\u6210\u65f6\u673a\u4f5c\u7528\u8303\u56f4<\/tr>\n\n\n\n
    clientRequestId<\/td>\n\u5ba2\u6237\u7aef<\/td>\n\u7528\u6237\u70b9\u51fb\u63d0\u4ea4\u90a3\u4e00\u523b<\/td>\n\u8ba2\u5355\u8868\u843d\u5e93\u5e42\u7b49<\/td>\n<\/tr>\n
    orderNo<\/td>\n\u670d\u52a1\u7aef（\u96ea\u82b1 + \u57fa\u56e0\u6cd5）<\/td>\n\u901a\u8fc7\u9884\u68c0\u67e5\u3001\u51c6\u5907\u6263\u5e93\u5b58\u90a3\u4e00\u523b<\/td>\n\u5e93\u5b58\u6263\u51cf\u5e42\u7b49 + \u5206\u7247\u8def\u7531<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u8ba2\u5355\u53f7\u6bcf\u6b21\u5c1d\u8bd5\u90fd\u4f1a\u91cd\u65b0\u751f\u6210，\u8fd9\u4e00\u70b9\u5f88\u5173\u952e，\u7b2c\u516d\u8282\u4f1a\u8bb2\u5b83\u4e3a\u4ec0\u4e48\u53cd\u800c\u8ba9\u65b9\u6848\u66f4\u5065\u58ee\u3002<\/p>\n

    \u4e09\u3001\u6570\u636e\u6d41：\u9884\u68c0\u67e5 + \u552f\u4e00\u952e\u53cc\u4fdd\u9669<\/h3>\n

    POST \/api\/order {<\/span> clientRequestId: "a3f8…"<\/span>, items: [<\/span>..<\/span>.]<\/span> }<\/span>
    \n \u2502
    \n \u25bc
    \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
    \n\u2502 OrderService.create(<\/span>)<\/span> \u2502
    \n\u2502 \u2502
    \n\u2502 \u250c\u2500 \u7b2c\u4e00\u5c42：\u9884\u68c0\u67e5（\u6321\u6389\u7edd\u5927\u591a\u6570\u91cd\u590d，\u96f6\u526f\u4f5c\u7528）\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
    \n\u2502 \u2502 SELECT * FROM t_order \u2502 \u2502
    \n\u2502 \u2502 WHERE client_request_id =<\/span> ? \u2502 \u2502
    \n\u2502 \u2502 \u251c\u2500 \u547d\u4e2d \u2192 \u5f52\u5c5e\u6821\u9a8c（\u662f\u672c\u4eba\u7684\u5355\u5417？） \u2502 \u2502
    \n\u2502 \u2502 \u2502 \u662f \u2192 \u56de\u653e\u5df2\u6709\u8ba2\u5355，\u4e0d\u78b0\u5e93\u5b58 \u2502 \u2502
    \n\u2502 \u2502 \u2502 \u5426 \u2192 400<\/span> \u53c2\u6570\u51b2\u7a81（\u9632\u8d8a\u6743\u56de\u653e） \u2502 \u2502
    \n\u2502 \u2502 \u2514\u2500 \u672a\u547d\u4e2d \u2192 \u7ee7\u7eed \u2502 \u2502
    \n\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
    \n\u2502 \u2502 \u2502
    \n\u2502 \u250c\u2500 \u751f\u6210 orderNo（\u96ea\u82b1+\u57fa\u56e0）\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
    \n\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
    \n\u2502 \u2502 \u2502
    \n\u2502 \u250c\u2500 \u8fdc\u7a0b\u6263\u5e93\u5b58（\u4e8b\u52a1\u5916，orderNo \u4f5c\u5e42\u7b49\u952e）\u2500\u2510 \u2502
    \n\u2502 \u2502 for<\/span> each item: stockFeign.deduct(<\/span>)<\/span> \u2502 \u2502
    \n\u2502 \u2502 \u4efb\u4e00\u6b65\u5931\u8d25 \u2192 compensateDeducts \u8fd8\u56de\u53bb \u2502 \u2502
    \n\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
    \n\u2502 \u2502 \u2502
    \n\u2502 \u250c\u2500 \u672c\u5730\u4e8b\u52a1\u843d\u5e93 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
    \n\u2502 \u2502 INSERT t_order（\u649e uk_client_request_id）\u2502 \u2502
    \n\u2502 \u2502 INSERT t_order_item \u2502 \u2502
    \n\u2502 \u2502 INSERT t_event_record（Outbox, WAIT） \u2502 \u2502
    \n\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
    \n\u2502 \u2502 \u2502
    \n\u2502 \u250c\u2500 \u7b2c\u4e8c\u5c42：\u649e\u552f\u4e00\u952e \u2192 \u4e8b\u52a1\u56de\u6eda \u2192 \u8865\u507f \u2500\u2500\u2500\u2500\u2510 \u2502
    \n\u2502 \u2502 compensateDeducts(<\/span>orderNo, deducted)<\/span> \u2502 \u2502
    \n\u2502 \u2502 \u518d\u67e5\u4e00\u6b21 \u2192 \u56de\u653e\u5e76\u53d1\u8d62\u5bb6\u7684\u8ba2\u5355 \u2502 \u2502
    \n\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
    \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

    \u4e24\u5c42\u7684\u5173\u7cfb：\u9884\u68c0\u67e5\u662f\u300c\u6027\u80fd\u4f18\u5316 + \u5e38\u89c1\u8def\u5f84\u300d，\u552f\u4e00\u952e\u662f\u300c\u6b63\u786e\u6027\u4fdd\u8bc1\u300d\u3002\u9884\u68c0\u67e5\u6321\u4f4f 99% \u7684\u91cd\u590d（\u7528\u6237\u8fde\u70b9\u3001\u5ba2\u6237\u7aef\u91cd\u8bd5），\u4ee3\u4ef7\u53ea\u662f\u4e00\u6b21\u7d22\u5f15\u67e5\u8be2；\u5269\u4e0b\u7684\u5e76\u53d1\u7ade\u6001（\u4e24\u4e2a\u8bf7\u6c42\u540c\u65f6\u8d8a\u8fc7\u9884\u68c0\u67e5）\u7531\u552f\u4e00\u952e\u515c\u4f4f\u3002<\/p>\n

    \u53cd\u8fc7\u6765\u4e0d\u884c：\u53ea\u505a\u9884\u68c0\u67e5\u4f1a\u5728\u5e76\u53d1\u4e0b\u53cc\u5f00\u5355；\u53ea\u505a\u552f\u4e00\u952e\u5219\u6bcf\u6b21\u91cd\u590d\u8bf7\u6c42\u90fd\u8981\u8d70\u5b8c\u300c\u6263\u5e93\u5b58 \u2192 \u843d\u5e93\u5931\u8d25 \u2192 \u8865\u507f\u300d\u7684\u5b8c\u6574\u6d41\u7a0b，\u6d6a\u8d39\u8fdc\u7a0b\u8c03\u7528\u8fd8\u5236\u9020\u65e0\u8c13\u7684\u8865\u507f\u6d41\u91cf\u3002<\/p>\n

    \u56db\u3001\u4f01\u4e1a\u7ea7\u4ee3\u7801\u5b9e\u73b0<\/h3>\n

    4.1 \u4e8b\u52a1\u8fb9\u754c\u8981\u62c6\u5f00（\u81ea\u8c03\u7528\u4f1a\u5931\u6548）<\/h4>\n

    \u4e00\u4e2a\u5173\u952e\u5de5\u7a0b\u7ec6\u8282：\u8865\u507f\u903b\u8f91\u5fc5\u987b\u5728\u4e8b\u52a1\u63d0\u4ea4\/\u56de\u6eda\u4e4b\u540e\u518d\u6267\u884c，\u56e0\u4e3a compensateDeducts \u662f\u8fdc\u7a0b\u8c03\u7528，\u5728\u4e8b\u52a1\u5185\u8c03\u7528\u4f1a\u957f\u65f6\u95f4\u6301\u6709\u6570\u636e\u5e93\u8fde\u63a5\u548c\u884c\u9501\u3002<\/p>\n

    @Service<\/span>
    \npublic<\/span> class<\/span> OrderService<\/span> {<\/span><\/p>\n

    @Resource<\/span> private<\/span> OrderTxService<\/span> orderTxService;<\/span> \/\/ \u2605 \u72ec\u7acb Bean，\u4e0d\u662f this \u8c03\u7528<\/span>
    \n @Resource<\/span> private<\/span> OrderMapper<\/span> orderMapper;<\/span>
    \n @Resource<\/span> private<\/span> StockFeign<\/span> stockFeign;<\/span><\/p>\n

    public<\/span> OrderVO<\/span> create<\/span>(<\/span>CreateOrderRequest<\/span> req,<\/span> Long<\/span> userId)<\/span> {<\/span><\/p>\n

    \/\/ \u2550\u2550 \u7b2c\u4e00\u5c42：\u9884\u68c0\u67e5（\u53ea\u8bfb，\u65e0\u526f\u4f5c\u7528）\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550<\/span>
    \n if<\/span> (<\/span>StringUtils<\/span>.<\/span>hasText<\/span>(<\/span>req.<\/span>getClientRequestId<\/span>(<\/span>)<\/span>)<\/span>)<\/span> {<\/span>
    \n Order<\/span> exist =<\/span> orderMapper.<\/span>selectByClientRequestId<\/span>(<\/span>req.<\/span>getClientRequestId<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>exist !=<\/span> null<\/span>)<\/span> {<\/span>
    \n return<\/span> replay<\/span>(<\/span>exist,<\/span> userId)<\/span>;<\/span> \/\/ \u5f52\u5c5e\u6821\u9a8c + \u56de\u653e<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u2550\u2550 \u751f\u6210\u8ba2\u5355\u53f7：\u96ea\u82b1 ID + \u57fa\u56e0\u6cd5（\u4f4e 8 \u4f4d = userId % 256）\u2550\u2550<\/span>
    \n String<\/span> orderNo =<\/span> snowflakeIdGenerator.<\/span>nextOrderNo<\/span>(<\/span>userId)<\/span>;<\/span><\/p>\n

    \/\/ \u2550\u2550 \u8fdc\u7a0b\u6263\u5e93\u5b58：\u4e8b\u52a1\u5916，orderNo \u4f5c\u5e42\u7b49\u952e \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550<\/span>
    \n List<\/span><<\/span>DeductedItem<\/span>><\/span><\/span> deducted =<\/span> new<\/span> ArrayList<\/span><<\/span>><\/span><\/span>(<\/span>)<\/span>;<\/span>
    \n try<\/span> {<\/span>
    \n for<\/span> (<\/span>OrderItemDTO<\/span> item :<\/span> req.<\/span>getItems<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
    \n DeductResult<\/span> r =<\/span> stockFeign.<\/span>deduct<\/span>(<\/span>new<\/span> DeductRequest<\/span>(<\/span>
    \n orderNo,<\/span> item.<\/span>getProductId<\/span>(<\/span>)<\/span>,<\/span> item.<\/span>getQuantity<\/span>(<\/span>)<\/span>,<\/span> item.<\/span>getPrice<\/span>(<\/span>)<\/span>)<\/span>)<\/span>;<\/span>
    \n deducted.<\/span>add<\/span>(<\/span>new<\/span> DeductedItem<\/span>(<\/span>item.<\/span>getProductId<\/span>(<\/span>)<\/span>,<\/span> item.<\/span>getQuantity<\/span>(<\/span>)<\/span>,<\/span> r)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>
    \n compensateDeducts<\/span>(<\/span>orderNo,<\/span> deducted)<\/span>;<\/span> \/\/ \u90e8\u5206\u6210\u529f \u2192 \u5168\u8fd8\u56de\u53bb<\/span>
    \n throw<\/span> e;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u2550\u2550 \u672c\u5730\u4e8b\u52a1\u843d\u5e93 \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550<\/span>
    \n try<\/span> {<\/span>
    \n return<\/span> orderTxService.<\/span>persist<\/span>(<\/span>orderNo,<\/span> userId,<\/span>
    \n req.<\/span>getClientRequestId<\/span>(<\/span>)<\/span>,<\/span> req.<\/span>getItems<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>DuplicateKeyException<\/span> e)<\/span> {<\/span>
    \n \/\/ \u2550\u2550 \u7b2c\u4e8c\u5c42：\u5e76\u53d1\u7ade\u6001，\u53e6\u4e00\u4e2a\u540c\u952e\u8bf7\u6c42\u5148\u843d\u5e93\u4e86 \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550<\/span>
    \n compensateDeducts<\/span>(<\/span>orderNo,<\/span> deducted)<\/span>;<\/span> \/\/ \u4e8b\u52a1\u5df2\u56de\u6eda，\u4e8b\u52a1\u5916\u8865\u507f<\/span>
    \n Order<\/span> exist =<\/span> orderMapper.<\/span>selectByClientRequestId<\/span>(<\/span>req.<\/span>getClientRequestId<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>exist ==<\/span> null<\/span>)<\/span> {<\/span>
    \n throw<\/span> e;<\/span> \/\/ \u7406\u8bba\u4e0d\u8be5\u53d1\u751f，\u4fdd\u5b88\u5931\u8d25<\/span>
    \n }<\/span>
    \n return<\/span> replay<\/span>(<\/span>exist,<\/span> userId)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>Exception<\/span> e)<\/span> {<\/span>
    \n compensateDeducts<\/span>(<\/span>orderNo,<\/span> deducted)<\/span>;<\/span> \/\/ \u843d\u5e93\u5931\u8d25 \u2192 \u8fd8\u5e93\u5b58<\/span>
    \n throw<\/span> e;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    💡 \u4e3a\u4ec0\u4e48 persist \u5fc5\u987b\u653e\u5728\u53e6\u4e00\u4e2a Bean \u91cc？ Spring \u7684 @Transactional \u9760 AOP \u4ee3\u7406\u751f\u6548\u3002\u5982\u679c\u5728 create() \u91cc\u76f4\u63a5 this.persist()，\u8c03\u7528\u8d70\u7684\u662f\u539f\u59cb\u5bf9\u8c61\u800c\u4e0d\u662f\u4ee3\u7406，\u6ce8\u89e3\u5b8c\u5168\u4e0d\u751f\u6548\u2014\u2014\u8ba2\u5355\u63d2\u5165\u4e0d\u4f1a\u5728\u4e8b\u52a1\u91cc，DuplicateKeyException \u4e5f\u4e0d\u4f1a\u89e6\u53d1\u56de\u6eda\u3002\u8fd9\u662f\u81ea\u8c03\u7528\u5931\u6548\u7684\u7ecf\u5178\u5751，\u800c\u4e14\u5b83\u4e0d\u62a5\u9519，\u53ea\u662f\u9759\u9ed8\u5730\u6ca1\u6709\u4e8b\u52a1\u3002<\/p>\n

    4.2 \u4e8b\u52a1\u65b9\u6cd5<\/h4>\n

    @Service<\/span>
    \npublic<\/span> class<\/span> OrderTxService<\/span> {<\/span><\/p>\n

    @Transactional<\/span>(<\/span>rollbackFor =<\/span> Exception<\/span>.<\/span>class<\/span>)<\/span>
    \n public<\/span> OrderVO<\/span> persist<\/span>(<\/span>String<\/span> orderNo,<\/span> Long<\/span> userId,<\/span>
    \n String<\/span> clientRequestId,<\/span> List<\/span><<\/span>OrderItemDTO<\/span>><\/span><\/span> items)<\/span> {<\/span><\/p>\n

    Order<\/span> order =<\/span> new<\/span> Order<\/span>(<\/span>)<\/span>;<\/span>
    \n order.<\/span>setOrderNo<\/span>(<\/span>orderNo)<\/span>;<\/span>
    \n order.<\/span>setUserId<\/span>(<\/span>userId)<\/span>;<\/span>
    \n order.<\/span>setClientRequestId<\/span>(<\/span>clientRequestId)<\/span>;<\/span> \/\/ \u53ef\u4e3a null<\/span>
    \n order.<\/span>setStatus<\/span>(<\/span>OrderStatus<\/span>.<\/span>WAIT_PAY<\/span>.<\/span>name<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n order.<\/span>setTotalAmount<\/span>(<\/span>calcTotal<\/span>(<\/span>items)<\/span>)<\/span>;<\/span>
    \n orderMapper.<\/span>insert<\/span>(<\/span>order)<\/span>;<\/span> \/\/ \u2190 \u649e uk_client_request_id \u5728\u8fd9\u91cc<\/span><\/p>\n

    orderItemMapper.<\/span>batchInsert<\/span>(<\/span>orderNo,<\/span> items)<\/span>;<\/span> \/\/ \u5546\u54c1\u5feb\u7167<\/span><\/p>\n

    \/\/ Transactional Outbox：\u53ea\u5199\u4e8b\u4ef6，\u4e0d\u53d1 MQ<\/span>
    \n eventRecordMapper.<\/span>insert<\/span>(<\/span>EventRecord<\/span>.<\/span>waitOf<\/span>(<\/span>orderNo,<\/span> OrderEventType<\/span>.<\/span>CREATED<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

    return<\/span> toVO<\/span>(<\/span>order,<\/span> items)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u8fd9\u4e09\u6761 INSERT \u5fc5\u987b\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u91cc：\u8ba2\u5355\u4e3b\u8868\u3001\u8ba2\u5355\u660e\u7ec6\u3001Outbox \u4e8b\u4ef6\u3002\u4efb\u4f55\u4e00\u6761\u5931\u8d25\u90fd\u6574\u4f53\u56de\u6eda，\u5426\u5219\u4f1a\u51fa\u73b0\u300c\u6709\u8ba2\u5355\u6ca1\u660e\u7ec6\u300d\u6216\u8005\u300c\u6709\u8ba2\u5355\u4f46\u4e8b\u4ef6\u6c38\u8fdc\u53d1\u4e0d\u51fa\u53bb（\u79ef\u5206\/\u77ed\u4fe1\u6c38\u8fdc\u4e0d\u5230\u8d26）\u300d\u3002<\/p>\n

    4.3 \u5f52\u5c5e\u6821\u9a8c：\u522b\u8ba9\u4eba\u62ff\u4f60\u7684\u952e\u56de\u653e\u4f60\u7684\u5355<\/h4>\n

    private<\/span> OrderVO<\/span> replay<\/span>(<\/span>Order<\/span> exist,<\/span> Long<\/span> userId)<\/span> {<\/span>
    \n \/\/ \u5e42\u7b49\u952e\u662f\u5ba2\u6237\u7aef\u751f\u6210\u7684\u5b57\u7b26\u4e32，\u610f\u5473\u7740\u5b83\u53ef\u80fd\u88ab\u731c\u5230 \/ \u649e\u5230<\/span>
    \n \/\/ \u5982\u679c\u4e0d\u6821\u9a8c\u5f52\u5c5e，\u522b\u4eba\u62ff\u4e00\u4e2a\u5df2\u77e5\u7684 clientRequestId \u5c31\u80fd：<\/span>
    \n \/\/ 1. \u8bfb\u5230\u4f60\u7684\u8ba2\u5355（\u4fe1\u606f\u6cc4\u9732）<\/span>
    \n \/\/ 2. \u8ba9\u4f60\u7684\u4e0b\u5355\u8bf7\u6c42"\u6210\u529f"\u8fd4\u56de\u4e00\u5f20\u4e0d\u5c5e\u4e8e\u4f60\u7684\u8ba2\u5355<\/span>
    \n if<\/span> (<\/span>!<\/span>exist.<\/span>getUserId<\/span>(<\/span>)<\/span>.<\/span>equals<\/span>(<\/span>userId)<\/span>)<\/span> {<\/span>
    \n throw<\/span> new<\/span> BizException<\/span>(<\/span>ResultCode<\/span>.<\/span>PARAM_CONFLICT<\/span>,<\/span> "clientRequestId \u5df2\u88ab\u5360\u7528"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n return<\/span> toVO<\/span>(<\/span>exist)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \u8fd9\u6761\u6821\u9a8c\u5bb9\u6613\u88ab\u5ffd\u7565，\u4f46\u5b83\u662f\u5e42\u7b49\u952e\u5e26\u6765\u7684\u65b0\u653b\u51fb\u9762：\u5e42\u7b49\u952e\u662f\u5ba2\u6237\u7aef\u53ef\u63a7\u7684\u8f93\u5165，\u51e1\u662f\u5ba2\u6237\u7aef\u53ef\u63a7\u4e14\u7528\u4e8e\u67e5\u8be2\/\u56de\u653e\u7684\u8f93\u5165，\u90fd\u5fc5\u987b\u505a\u5f52\u5c5e\u6821\u9a8c\u3002\u8fd4\u56de 400 \u53c2\u6570\u51b2\u7a81\u800c\u4e0d\u662f\u300c\u8ba2\u5355\u4e0d\u5b58\u5728\u300d，\u4e5f\u662f\u523b\u610f\u7684\u2014\u2014\u4e0d\u6cc4\u9732\u300c\u8fd9\u4e2a\u952e\u786e\u5b9e\u5b58\u5728\u300d\u8fd9\u4e2a\u4fe1\u606f\u3002<\/p>\n

    \u4e94\u3001\u5e76\u53d1\u8fb9\u754c：\u4e24\u4e2a\u540c\u952e\u8bf7\u6c42\u90fd\u8d8a\u8fc7\u4e86\u9884\u68c0\u67e5<\/h3>\n

    \u8fd9\u662f\u6574\u4e2a\u65b9\u6848\u6700\u9700\u8981\u8bb2\u6e05\u695a\u7684\u4e00\u6bb5\u3002<\/p>\n

    \u65f6\u523b \u8bf7\u6c42 A（\u952e =<\/span> K） \u8bf7\u6c42 B（\u952e =<\/span> K）
    \n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500
    \nT1 SELECT ..<\/span>. K \u2192 null
    \nT2 SELECT ..<\/span>. K \u2192 null \u2190 \u90fd\u8d8a\u8fc7\u4e86\u9884\u68c0\u67e5
    \nT3 \u751f\u6210 orderNo_A
    \nT4 \u751f\u6210 orderNo_B
    \nT5 Feign \u6263\u5e93\u5b58（orderNo_A）
    \nT6 Feign \u6263\u5e93\u5b58（orderNo_B） \u2190 \u4e24\u8fb9\u90fd\u6263\u4e86
    \nT7 INSERT t_order(<\/span>K)<\/span> \u2192 \u6210\u529f \u2705
    \nT8 INSERT t_order(<\/span>K)<\/span> \u2192 \u649e\u552f\u4e00\u952e \u274c
    \nT9 \u4e8b\u52a1\u56de\u6eda \u2192 \u8865\u507f：\u8fd8\u6389 orderNo_B \u7684\u6263\u51cf
    \nT10 \u67e5\u5230 A \u7684\u5355 \u2192 \u56de\u653e\u8fd4\u56de<\/p>\n

    \u51e0\u4e2a\u5173\u952e\u70b9：<\/p>\n

    \u2460 \u4e24\u4e2a\u8bf7\u6c42\u5404\u81ea\u751f\u6210\u4e86\u4e0d\u540c\u7684 orderNo\u3002 \u8fd9\u662f\u5fc5\u987b\u7684\u2014\u2014orderNo \u662f\u6bcf\u5f20\u8ba2\u5355\u7684\u552f\u4e00\u6807\u8bc6，\u4e0d\u53ef\u80fd\u4e24\u4e2a\u8bf7\u6c42\u5171\u7528\u4e00\u4e2a\u3002\u800c\u5b83\u540c\u65f6\u53c8\u662f\u5e93\u5b58\u6263\u51cf\u7684\u5e42\u7b49\u952e（\u89c1\u4e0a\u4e00\u7bc7），\u6240\u4ee5 A \u6263\u7684\u662f orderNo_A \u7684\u5e93\u5b58，B \u6263\u7684\u662f orderNo_B \u7684\u5e93\u5b58，\u4e24\u8fb9\u662f\u4e24\u7b14\u5b8c\u5168\u72ec\u7acb\u7684\u5e42\u7b49\u64cd\u4f5c，\u90fd\u80fd\u6210\u529f\u3002<\/p>\n

    \u2461 \u843d\u5e93\u65f6\u53ea\u4f1a\u6709\u4e00\u5f20\u8ba2\u5355\u3002 uk_client_request_id \u552f\u4e00\u7d22\u5f15\u8ba9 T7 \/ T8 \u91cc\u53ea\u53ef\u80fd\u6709\u4e00\u4e2a\u6210\u529f\u3002\u6570\u636e\u5e93\u7684\u552f\u4e00\u7ea6\u675f\u662f\u5f15\u64ce\u7ea7\u522b\u7684\u539f\u5b50\u5224\u65ad，\u4e0d\u4f9d\u8d56\u5e94\u7528\u5c42\u7684\u4efb\u4f55\u9501\u6216\u68c0\u67e5\u3002<\/p>\n

    \u2462 \u8f93\u7684\u90a3\u4e00\u65b9\u5fc5\u987b\u8865\u507f\u5e93\u5b58\u3002 B \u5728 T6 \u6210\u529f\u6263\u4e86\u5e93\u5b58，\u4f46 T8 \u843d\u5e93\u5931\u8d25\u2014\u2014\u5982\u679c\u53ea\u662f\u7b80\u5355\u5730\u628a\u5f02\u5e38\u629b\u51fa\u53bb，orderNo_B \u7684\u6263\u51cf\u5c31\u6c38\u8fdc\u7559\u5728\u4e86\u5e93\u5b58\u670d\u52a1\u91cc，\u5e93\u5b58\u51ed\u7a7a\u5c11\u4e86\u4e00\u4ef6，\u800c\u6ca1\u6709\u4efb\u4f55\u8ba2\u5355\u5bf9\u5e94\u5b83\u3002\u8fd9\u662f\u300c\u91cd\u590d\u4e0b\u5355\u300d\u95ee\u9898\u91cc\u6700\u9690\u853d\u7684\u4e00\u7c7b bug：\u7528\u6237\u53ea\u770b\u5230\u4e00\u5f20\u5355，\u4f46\u5e93\u5b58\u6263\u4e86\u4e24\u4ef6\u3002<\/p>\n

    \u6240\u4ee5 T9 \u7684\u8865\u507f\u4e0d\u662f\u53ef\u9009\u7684，\u662f\u5fc5\u987b\u7684：<\/p>\n

    \/**
    \n * \u8865\u507f\u5df2\u6210\u529f\u6263\u51cf\u7684\u5e93\u5b58\u3002
    \n * \u56e0\u4e3a stock-service \u4fa7\u7684\u6062\u590d\u4e5f\u662f\u5e42\u7b49\u7684（orderNo + productId + RESTORE \u552f\u4e00\u952e），
    \n * \u8fd9\u4e2a\u8865\u507f\u65b9\u6cd5\u672c\u8eab\u53ef\u4ee5\u88ab\u5b89\u5168\u91cd\u8bd5，\u4e0d\u4f1a\u591a\u8fd8\u3002
    \n *\/<\/span>
    \n private<\/span> void<\/span> compensateDeducts<\/span>(<\/span>String<\/span> orderNo,<\/span> List<\/span><<\/span>DeductedItem<\/span>><\/span><\/span> deducted)<\/span> {<\/span>
    \n for<\/span> (<\/span>DeductedItem<\/span> item :<\/span> deducted)<\/span> {<\/span>
    \n try<\/span> {<\/span>
    \n stockFeign.<\/span>restore<\/span>(<\/span>new<\/span> RestoreRequest<\/span>(<\/span>
    \n orderNo,<\/span> item.<\/span>getProductId<\/span>(<\/span>)<\/span>,<\/span> item.<\/span>getQuantity<\/span>(<\/span>)<\/span>)<\/span>)<\/span>;<\/span>
    \n }<\/span> catch<\/span> (<\/span>Exception<\/span> ex)<\/span> {<\/span>
    \n \/\/ \u8865\u507f\u5931\u8d25\u4e0d\u80fd\u541e\u6389：\u8fd9\u662f\u6570\u636e\u4e0d\u4e00\u81f4，\u5fc5\u987b\u7559\u75d5<\/span>
    \n log.<\/span>error<\/span>(<\/span>"[compensate] \u5e93\u5b58\u8865\u507f\u5931\u8d25 orderNo={}, productId={}, qty={}"<\/span>,<\/span>
    \n orderNo,<\/span> item.<\/span>getProductId<\/span>(<\/span>)<\/span>,<\/span> item.<\/span>getQuantity<\/span>(<\/span>)<\/span>,<\/span> ex)<\/span>;<\/span>
    \n \/\/ \u515c\u5e95：\u5199\u4e00\u6761 STOCK_RESTORE \u7684 Outbox \u4e8b\u4ef6，\u4ea4\u7ed9\u8c03\u5ea6\u5668\u8865\u53d1<\/span>
    \n eventRecordMapper.<\/span>insert<\/span>(<\/span>EventRecord<\/span>.<\/span>waitOf<\/span>(<\/span>
    \n orderNo,<\/span> OrderEventType<\/span>.<\/span>STOCK_RESTORE<\/span>)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \u8fd9\u91cc\u5f62\u6210\u4e86\u4e00\u4e2a\u95ed\u73af：\u672c\u5730\u4e8b\u52a1\u5931\u8d25 \u2192 \u540c\u6b65\u8865\u507f \u2192 \u8865\u507f\u5931\u8d25 \u2192 \u5199 Outbox \u4e8b\u4ef6 \u2192 EventRetryScheduler \u5f02\u6b65\u8865\u53d1 \u2192 \u4e0b\u6e38\u6062\u590d\u63a5\u53e3\u5e42\u7b49 \u2192 \u91cd\u590d\u8865\u53d1\u65e0\u5bb3\u3002\u6bcf\u4e00\u5c42\u90fd\u5047\u8bbe\u300c\u4e0a\u4e00\u5c42\u53ef\u80fd\u5931\u8d25\u300d\u3002<\/p>\n

    \u2463 \u8f93\u7684\u90a3\u4e00\u65b9\u6700\u7ec8\u8981\u8fd4\u56de\u8d62\u5bb6\u7684\u8ba2\u5355，\u800c\u4e0d\u662f\u62a5\u9519\u3002 \u7528\u6237\u89c6\u89d2\u53ea\u6709\u4e00\u6b21\u70b9\u51fb，\u5fc5\u987b\u62ff\u5230\u4e00\u5f20\u8ba2\u5355\u3002B \u5728 T10 \u67e5\u5230 A \u7684\u8ba2\u5355\u540e\u76f4\u63a5\u56de\u653e\u8fd4\u56de（\u5f53\u7136\u8981\u505a\u5f52\u5c5e\u6821\u9a8c），\u7528\u6237\u62ff\u5230\u7684\u662f\u540c\u4e00\u5f20\u8ba2\u5355，\u65e0\u611f\u3002<\/p>\n

    \u516d\u3001\u8fd9\u5957\u8bbe\u8ba1\u7684\u5c42\u6b21\u603b\u7ed3<\/h3>\n

    \u7b2c 1<\/span> \u5c42 clientRequestId \u2190 \u5ba2\u6237\u7aef\u751f\u6210，\u6807\u8bc6"\u4e00\u6b21\u7528\u6237\u610f\u56fe"<\/span>
    \n\u7b2c 2<\/span> \u5c42 \u9884\u68c0\u67e5 SELECT \u2190 \u5e94\u7528\u5c42，\u6321\u6389\u7edd\u5927\u591a\u6570\u91cd\u590d，\u96f6\u526f\u4f5c\u7528
    \n\u7b2c 3<\/span> \u5c42 \u552f\u4e00\u952e uk_ \u2190 \u6570\u636e\u5e93\u5c42，\u6700\u7ec8\u95f8\u95e8，\u5e76\u53d1\u5b89\u5168
    \n\u7b2c 4<\/span> \u5c42 \u8865\u507f + Outbox \u2190 \u515c\u5e95，\u5904\u7406"\u6263\u4e86\u5e93\u5b58\u4f46\u6ca1\u843d\u6210\u5355"<\/span><\/p>\n

    \u6bcf\u4e00\u5c42\u89e3\u51b3\u4e0a\u4e00\u5c42\u7684\u9057\u7559\u95ee\u9898，\u7f3a\u4e00\u5c42\u5c31\u4f1a\u5728\u67d0\u4e2a\u573a\u666f\u4e0b\u6f0f：<\/p>\n\n\u7f3a\u54ea\u5c42\u540e\u679c<\/tr>\n\n\n\n\n\n
    \u7f3a clientRequestId<\/td>\n\u670d\u52a1\u7aef\u65e0\u6cd5\u533a\u5206\u300c\u540c\u4e00\u6b21\u610f\u56fe\u7684\u91cd\u8bd5\u300d\u548c\u300c\u4e24\u6b21\u771f\u5b9e\u8d2d\u4e70\u300d<\/td>\n<\/tr>\n
    \u7f3a\u9884\u68c0\u67e5<\/td>\n\u6bcf\u6b21\u91cd\u590d\u90fd\u8981\u8d70\u5b8c\u6263\u5e93\u5b58 + \u8865\u507f\u7684\u5b8c\u6574\u94fe\u8def，\u4ea7\u751f\u5927\u91cf\u65e0\u8c13\u7684\u8fdc\u7a0b\u8c03\u7528<\/td>\n<\/tr>\n
    \u7f3a\u552f\u4e00\u952e<\/td>\n\u5e76\u53d1\u7ade\u6001\u4e0b\u5fc5\u7136\u53cc\u5f00\u5355（\u9884\u68c0\u67e5\u662f\u8bfb\u6539\u5199，\u975e\u539f\u5b50）<\/td>\n<\/tr>\n
    \u7f3a\u8865\u507f<\/td>\n\u300c\u91cd\u590d\u8ba2\u5355\u300d\u53d8\u6210\u4e86\u300c\u5e93\u5b58\u5c11\u4e00\u4ef6\u4f46\u6ca1\u6709\u8ba2\u5355\u300d\u2014\u2014\u66f4\u9690\u853d\u7684\u6570\u636e\u4e0d\u4e00\u81f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e03\u3001\u6d4b\u8bd5\u8986\u76d6<\/h3>\n

    mvn test<\/span> # 70 \u4e2a\u7528\u4f8b<\/span>
    \nmvn -P<\/span> it test<\/span> # 5 \u4e2a\u771f MySQL \u96c6\u6210\u6d4b\u8bd5（Testcontainers）<\/span><\/p>\n

    \u4e0e\u672c\u6587\u76f4\u63a5\u76f8\u5173\u7684\u7528\u4f8b：<\/p>\n

      \n
    • \u5e26 clientRequestId \u91cd\u590d\u4e0b\u5355，\u56de\u653e\u5df2\u6709\u8ba2\u5355\u4e14\u4e0d\u78b0\u5e93\u5b58 \u2014\u2014 \u9a8c\u8bc1\u7b2c\u4e00\u5c42\u9884\u68c0\u67e5\u7684\u56de\u653e\u8def\u5f84，\u5173\u952e\u65ad\u8a00\u662f\u300c\u5e93\u5b58\u6ca1\u6709\u4e8c\u6b21\u6263\u51cf\u300d，\u800c\u4e0d\u53ea\u662f\u300c\u8fd4\u56de\u4e86\u540c\u4e00\u4e2a\u8ba2\u5355\u53f7\u300d；<\/li>\n
    • \u4e0b\u5355\u843d\u5e93\u5931\u8d25\u8865\u507f\u5df2\u6263\u5e93\u5b58 \u2014\u2014 \u9a8c\u8bc1\u8865\u507f\u8def\u5f84，\u65ad\u8a00\u5e93\u5b58\u56de\u5230\u539f\u503c；<\/li>\n
    • \u5e76\u53d1\u540c\u952e\u4e0b\u5355\u53ea\u843d\u4e00\u5355 \u2014\u2014 \u9a8c\u8bc1\u552f\u4e00\u952e\u95f8\u95e8\u7684\u5e76\u53d1\u5b89\u5168\u6027；<\/li>\n
    • clientRequestId \u5f52\u5c5e\u6821\u9a8c \u2014\u2014 \u62ff\u522b\u4eba\u7684\u952e\u8bf7\u6c42，\u65ad\u8a00\u8fd4\u56de\u53c2\u6570\u51b2\u7a81\u800c\u4e0d\u662f\u522b\u4eba\u7684\u8ba2\u5355\u3002<\/li>\n<\/ul>\n

      \u4e3a\u4ec0\u4e48\u8981\u7528 Testcontainers \u8d77\u771f MySQL？\u56e0\u4e3a\u552f\u4e00\u7d22\u5f15\u5141\u8bb8\u591a\u4e2a NULL \u8fd9\u4e2a\u884c\u4e3a\u3001\u4ee5\u53ca DuplicateKeyException \u7684\u4e8b\u52a1\u8bed\u4e49，\u90fd\u662f InnoDB \u7279\u6709\u7684，H2 \/ \u5185\u5b58\u5e93\u7684\u6a21\u62df\u4f1a\u8ba9\u6d4b\u8bd5\u5931\u53bb\u610f\u4e49\u3002<\/p>\n

      \u516b\u3001\u9762\u8bd5 \/ \u7b80\u5386\u4eae\u70b9<\/h3>\n
        \n
      • \u300c\u9884\u68c0\u67e5 + \u552f\u4e00\u7d22\u5f15\u300d\u53cc\u4fdd\u9669\u7684\u4e0b\u5355\u5e42\u7b49\u65b9\u6848：\u660e\u786e\u533a\u5206\u4e86\u300c\u6027\u80fd\u4f18\u5316\u5c42\u300d\u548c\u300c\u6b63\u786e\u6027\u4fdd\u8bc1\u5c42\u300d，\u4e0d\u628a\u9884\u68c0\u67e5\u5f53\u6b63\u786e\u6027\u4f9d\u8d56\u2014\u2014\u8fd9\u662f\u5f88\u591a\u5b9e\u73b0\u4f1a\u8e29\u7684\u5751\u3002<\/li>\n
      • \u53ef\u9009\u5b57\u6bb5 + MySQL \u591a NULL \u8bed\u4e49\u505a\u5e73\u6ed1\u517c\u5bb9：\u65b0\u5ba2\u6237\u7aef\u4eab\u53d7\u5e42\u7b49\u4fdd\u62a4，\u8001\u5ba2\u6237\u7aef\u4e0d\u53d7\u5f71\u54cd，\u96f6\u505c\u673a\u5347\u7ea7\u3002<\/li>\n
      • \u5e76\u53d1\u7ade\u6001\u4e0b\u7684\u4e8b\u52a1\u4e0e\u8865\u507f\u95ed\u73af：\u8bc6\u522b\u51fa\u300c\u4e24\u4e2a\u540c\u952e\u8bf7\u6c42\u90fd\u8d8a\u8fc7\u9884\u68c0\u67e5\u300d\u8fd9\u4e2a\u771f\u5b9e\u7ade\u6001，\u5e76\u7528\u300c\u5404\u81ea\u72ec\u7acb orderNo + \u552f\u4e00\u952e\u88c1\u51b3 + \u5931\u8d25\u65b9\u8865\u507f + Outbox \u515c\u5e95\u300d\u5b8c\u6574\u6536\u53e3\u3002<\/li>\n
      • \u5e42\u7b49\u952e\u7684\u5f52\u5c5e\u6821\u9a8c：\u610f\u8bc6\u5230\u5ba2\u6237\u7aef\u53ef\u63a7\u7684\u5e42\u7b49\u952e\u662f\u65b0\u7684\u653b\u51fb\u9762，\u505a\u4e86\u8d8a\u6743\u56de\u653e\u9632\u62a4\u3002<\/li>\n
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