{"id":1354,"date":"2025-08-22T00:49:35","date_gmt":"2025-08-21T16:49:35","guid":{"rendered":"http:\/\/www.cmd137blog.top\/?p=1354"},"modified":"2025-08-22T00:49:37","modified_gmt":"2025-08-21T16:49:37","slug":"%e7%a7%8b%e5%a4%a9%e7%ac%ac%e4%b8%80%e6%9d%af%e5%a5%b6%e8%8c%b6%e7%9a%84%e7%88%86%e5%8d%95%e9%99%90%e6%b5%81%e9%97%ae%e9%a2%98%ef%bc%9a","status":"publish","type":"post","link":"http:\/\/www.cmd137blog.top\/?p=1354","title":{"rendered":"\u201c\u79cb\u5929\u7b2c\u4e00\u676f\u5976\u8336\u201d\u7684\u7206\u5355\u9650\u6d41\u95ee\u9898\uff1a"},"content":{"rendered":"\n<p><strong>\u9488\u5bf9\u7c7b\u4f3c\u4e8e\u201c\u79cb\u5929\u7684\u7b2c\u4e00\u676f\u5976\u8336\u201d\u5bfc\u81f4\u7684\u7206\u5355\u95ee\u9898\u573a\u666f\uff0c\u8bbe\u8ba1\u5e76\u5b9e\u73b0 \u9ad8\u5cf0\u671f\u5546\u6237\u52a8\u6001\u9650\u6d41\u4e0e\u6392\u961f\u673a\u5236\uff1a\u57fa\u4e8e Redis \u9608\u503c\u63a7\u5236 + RocketMQ \u5f02\u6b65\u961f\u5217\uff0c\u8d85\u8fc7\u9608\u503c\u7684\u8ba2\u5355\u8fdb\u5165\u6392\u961f\u5e76\u52a8\u6001\u91ca\u653e\uff0c\u524d\u7aef\u5b9e\u65f6\u5c55\u793a\u7b49\u5f85\u8fdb\u5ea6\uff0c\u6709\u6548\u964d\u4f4e\u5e97\u5458\u9a91\u624b\u8d1f\u8f7d\uff0c\u63d0\u5347\u7528\u6237\u6ee1\u610f\u5ea6\uff0c\u76f8\u6bd4\u5355\u7eaf Redis \u961f\u5217\u65b9\u6848\u53ef\u9760\u6027\u66f4\u9ad8\u3002<\/strong><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e00\u3001\u6838\u5fc3\u76ee\u6807\u4e0e\u6574\u4f53\u6d41\u7a0b<\/h1>\n\n\n\n<p><strong>\u6838\u5fc3\u76ee\u6807<\/strong>\uff1a\u5728\u5546\u6237\u5904\u7406\u80fd\u529b\u6709\u9650\u7684\u60c5\u51b5\u4e0b\uff0c\u786e\u4fdd\u8ba2\u5355\u4e0d\u4e22\u5931\u3001\u6309\u987a\u5e8f\u5904\u7406\uff0c\u540c\u65f6\u8ba9\u7528\u6237\u611f\u77e5\u7b49\u5f85\u8fdb\u5ea6\u3002<br><strong>\u6574\u4f53\u6d41\u7a0b<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7528\u6237\u4e0b\u5355 \u2192 \u8ba2\u5355\u670d\u52a1\uff08\u751f\u6210\u8ba2\u5355\uff09\u2192 \u9650\u6d41\u5224\u65ad\uff08Redis\uff09\u2192 \u2460 \u53ef\u5904\u7406 \u2192 \u76f4\u63a5\u5904\u7406  \n                                          \u2192 \u2461 \u5df2\u7206\u5355 \u2192 \u8fdb\u5165RocketMQ\u961f\u5217 \u2192 \u6d88\u8d39\u8005\u6309\u5e8f\u5904\u7406\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u7cfb\u7edf\u6d41\u7a0b\u8bf4\u660e<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e0b\u5355\u6d41\u7a0b<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7528\u6237\u4e0b\u5355\u8bf7\u6c42\u5230\u8fbe\u8ba2\u5355\u670d\u52a1<\/li>\n\n\n\n<li>\u8ba2\u5355\u670d\u52a1\u8c03\u7528\u9650\u6d41\u7ec4\u4ef6\u5224\u65ad\u662f\u5426\u53ef\u4ee5\u76f4\u63a5\u5904\u7406<\/li>\n\n\n\n<li>\u672a\u8fbe\u9608\u503c\uff1a\u76f4\u63a5\u5904\u7406\u8ba2\u5355\u5e76\u66f4\u65b0\u72b6\u6001<\/li>\n\n\n\n<li>\u5df2\u8fbe\u9608\u503c\uff1a\u5c06\u8ba2\u5355\u72b6\u6001\u8bbe\u4e3a &#8220;\u6392\u961f\u4e2d&#8221;\uff0c\u53d1\u9001\u5230 RocketMQ \u961f\u5217<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8ba2\u5355\u5904\u7406\u6d41\u7a0b<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6d88\u8d39\u8005\u4ece\u961f\u5217\u4e2d\u6309\u987a\u5e8f\u83b7\u53d6\u8ba2\u5355<\/li>\n\n\n\n<li>\u5c1d\u8bd5\u83b7\u53d6\u5904\u7406\u6743\u9650\uff0c\u6210\u529f\u5219\u5904\u7406\u8ba2\u5355<\/li>\n\n\n\n<li>\u5931\u8d25\u5219\u6302\u8d77\u961f\u5217 30 \u79d2\u540e\u91cd\u8bd5<\/li>\n\n\n\n<li>\u8d85\u8fc7\u6700\u5927\u91cd\u8bd5\u6b21\u6570\u5219\u8fdb\u5165\u6b7b\u4fe1\u961f\u5217<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u52a8\u6001\u8c03\u6574\u6d41\u7a0b<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7ba1\u7406\u5458\u901a\u8fc7\u540e\u53f0\u8c03\u6574\u5546\u6237\u9608\u503c<\/li>\n\n\n\n<li>\u9608\u503c\u53d8\u66f4\u5b9e\u65f6\u751f\u6548\uff0c\u5f71\u54cd\u540e\u7eed\u7684\u8ba2\u5355\u5904\u7406\u5224\u65ad<\/li>\n\n\n\n<li>\u7cfb\u7edf\u6839\u636e\u65b0\u9608\u503c\u81ea\u52a8\u8c03\u6574\u8ba2\u5355\u5904\u7406\u901f\u5ea6<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e8c\u3001\u5173\u952e\u6a21\u5757\u5b9e\u73b0\u903b\u8f91<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u9650\u6d41\u5224\u65ad\u6a21\u5757\uff08\u57fa\u4e8e Redis\uff09<\/h2>\n\n\n\n<p><strong>\u6838\u5fc3\u903b\u8f91<\/strong>\uff1a\u7528 Redis \u8bb0\u5f55\u6bcf\u4e2a\u5546\u6237\u7684 \u201c\u5f53\u524d\u6d3b\u8dc3\u8ba2\u5355\u6570\u201d\uff0c\u4e0e\u9884\u8bbe\u9608\u503c\u5bf9\u6bd4\uff0c\u51b3\u5b9a\u8ba2\u5355\u662f\u5426\u9700\u8981\u6392\u961f\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5206\u5e03\u5f0f\u8ba1\u6570<\/strong>\uff1a<br>\u4f7f\u7528 Redis \u7684<code>INCR<\/code>\u547d\u4ee4\u539f\u5b50\u6027\u9012\u589e \u201c\u6d3b\u8dc3\u8ba2\u5355\u6570\u201d\uff08\u952e\u683c\u5f0f\uff1a<code>merchant:active:orders:{merchantId}<\/code>\uff09\uff0c\u786e\u4fdd\u591a\u5b9e\u4f8b\u90e8\u7f72\u65f6\u8ba1\u6570\u51c6\u786e\u3002java\u8fd0\u884c<code>\/\/ \u5c1d\u8bd5\u83b7\u53d6\u5904\u7406\u6743\u9650\uff1a\u9012\u589e\u540e\u5224\u65ad\u662f\u5426\u8d85\u8fc7\u9608\u503c Long currentActive = redisTemplate.opsForValue().increment(key, 1); if (currentActive &lt;= threshold) { \/* \u53ef\u5904\u7406 *\/ } else { \/* \u56de\u9000\u8ba1\u6570\uff0c\u8fdb\u5165\u6392\u961f *\/ }<\/code><\/li>\n\n\n\n<li><strong>\u52a8\u6001\u9608\u503c\u7ba1\u7406<\/strong>\uff1a<br>\u9608\u503c\u5b58\u50a8\u5728 Redis \u4e2d\uff08\u952e\u683c\u5f0f\uff1a<code>merchant:threshold:{merchantId}<\/code>\uff09\uff0c\u652f\u6301\u5b9e\u65f6\u8c03\u6574\uff08\u5982\u8fd0\u8425\u624b\u52a8\u4fee\u6539\uff09\uff0c\u65e0\u9700\u91cd\u542f\u7cfb\u7edf\u3002\n<ul class=\"wp-block-list\">\n<li>\u65b0\u8ba2\u5355\u5230\u6765\u65f6\uff0c\u4f18\u5148\u4ece Redis \u8bfb\u53d6\u5546\u6237\u4e13\u5c5e\u9608\u503c\uff1b\u65e0\u914d\u7f6e\u65f6\u4f7f\u7528\u9ed8\u8ba4\u9608\u503c\u3002<\/li>\n\n\n\n<li>\u63d0\u4f9b<code>updateThreshold<\/code>\u65b9\u6cd5\uff0c\u4f9b\u7ba1\u7406\u540e\u53f0\u8c03\u7528\u66f4\u65b0\u9608\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8d44\u6e90\u91ca\u653e<\/strong>\uff1a<br>\u8ba2\u5355\u5904\u7406\u5b8c\u6210 \/ \u53d6\u6d88\u65f6\uff0c\u8c03\u7528<code>release<\/code>\u65b9\u6cd5\u9012\u51cf\u6d3b\u8dc3\u8ba2\u5355\u6570\uff0c\u907f\u514d\u8ba1\u6570\u5806\u79ef\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u8ba2\u5355\u6392\u961f\u6a21\u5757\uff08RocketMQ \u751f\u4ea7\u8005\uff09<\/h2>\n\n\n\n<p><strong>\u6838\u5fc3\u903b\u8f91<\/strong>\uff1a\u8d85\u8fc7\u9608\u503c\u7684\u8ba2\u5355\u8fdb\u5165 MQ \u961f\u5217\uff0c\u901a\u8fc7 \u201c\u5546\u6237 ID \u5206\u533a\u201d \u4fdd\u8bc1\u540c\u4e00\u5546\u6237\u7684\u8ba2\u5355\u6709\u5e8f\u6027\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6709\u5e8f\u6027\u4fdd\u8bc1<\/strong>\uff1a<br>\u53d1\u9001\u8ba2\u5355\u65f6\uff0c\u4f7f\u7528<code>MessageQueueSelector<\/code>\u6309 \u201c\u5546\u6237 ID % \u961f\u5217\u6570\u201d \u6620\u5c04\u5230\u56fa\u5b9a\u961f\u5217\uff0c\u786e\u4fdd\u540c\u4e00\u5546\u6237\u7684\u8ba2\u5355\u59cb\u7ec8\u8fdb\u5165\u540c\u4e00\u4e2a\u961f\u5217\uff08RocketMQ \u5355\u961f\u5217\u5185\u6d88\u606f\u4e25\u683c FIFO\uff09\u3002java\u8fd0\u884c<code>\/\/ \u6309\u5546\u6237ID\u5206\u533a\uff0c\u540c\u4e00\u5546\u6237\u8ba2\u5355\u8fdb\u5165\u56fa\u5b9a\u961f\u5217 return mqs.get((int) (merchantId % mqs.size()));<\/code><\/li>\n\n\n\n<li><strong>\u6d88\u606f\u5305\u88c5<\/strong>\uff1a<br>\u8ba2\u5355\u6d88\u606f\u5305\u542b<code>order<\/code>\uff08\u8ba2\u5355\u8be6\u60c5\uff09\u3001<code>retryCount<\/code>\uff08\u91cd\u8bd5\u6b21\u6570\uff09\u3001<code>createTime<\/code>\uff08\u521b\u5efa\u65f6\u95f4\uff09\uff0c\u4fbf\u4e8e\u540e\u7eed\u91cd\u8bd5\u548c\u987a\u5e8f\u6821\u9a8c\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u987a\u5e8f\u5904\u7406\u6a21\u5757\uff08RocketMQ \u6d88\u8d39\u8005\uff09<\/h2>\n\n\n\n<p><strong>\u6838\u5fc3\u903b\u8f91<\/strong>\uff1a\u4ece\u961f\u5217\u4e2d\u6309\u987a\u5e8f\u53d6\u5355\uff0c\u5904\u7406\u5931\u8d25\u65f6\u56fa\u5b9a\u95f4\u9694\u91cd\u8bd5\uff0c\u786e\u4fdd\u8001\u8ba2\u5355\u4f18\u5148\u5904\u7406\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u987a\u5e8f\u6d88\u8d39<\/strong>\uff1a<br>\u4f7f\u7528<code>MessageListenerOrderly<\/code>\uff08\u987a\u5e8f\u6d88\u606f\u76d1\u542c\u5668\uff09\uff0c\u4fdd\u8bc1\u540c\u4e00\u961f\u5217\u5185\u7684\u8ba2\u5355\u6309\u53d1\u9001\u987a\u5e8f\u5904\u7406\uff08\u5355\u7ebf\u7a0b\u6d88\u8d39\uff0c\u907f\u514d\u5e76\u53d1\u6253\u4e71\u987a\u5e8f\uff09\u3002<\/li>\n\n\n\n<li><strong>\u6709\u9650\u6b21\u91cd\u8bd5<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5904\u7406\u5931\u8d25\u65f6\uff0c\u901a\u8fc7<code>context.setSuspendCurrentQueueTimeMillis(30000)<\/code>\u8ba9\u961f\u5217\u6302\u8d77 30 \u79d2\uff0c\u800c\u975e\u963b\u585e\u7ebf\u7a0b\uff08\u63d0\u5347\u8d44\u6e90\u5229\u7528\u7387\uff09\u3002<\/li>\n\n\n\n<li>\u91cd\u8bd5\u6b21\u6570\u7d2f\u52a0\uff08<code>retryCount = \u6d88\u606f\u81ea\u5e26\u8ba1\u6570 + \u672c\u5730\u8ba1\u6570<\/code>\uff09\uff0c\u8d85\u8fc7 60 \u6b21\u5219\u8fdb\u5165\u6b7b\u4fe1\u961f\u5217\uff08\u907f\u514d\u65e0\u9650\u5faa\u73af\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6b7b\u4fe1\u5904\u7406<\/strong>\uff1a<br>\u8d85\u8fc7\u6700\u5927\u91cd\u8bd5\u6b21\u6570\u7684\u8ba2\u5355\u88ab\u53d1\u9001\u5230\u6b7b\u4fe1\u961f\u5217\uff08<code>ORDER_DLQ_TOPIC<\/code>\uff09\uff0c\u7b49\u5f85\u4eba\u5de5\u5e72\u9884\uff08\u5982\u5546\u6237\u957f\u671f\u7206\u5355\u65f6\u624b\u52a8\u5904\u7406\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u8ba2\u5355\u670d\u52a1\u4e0e\u4e1a\u52a1\u6574\u5408<\/h2>\n\n\n\n<p><strong>\u6838\u5fc3\u903b\u8f91<\/strong>\uff1a\u4e32\u8054\u9650\u6d41\u3001\u6392\u961f\u3001\u5904\u7406\u6d41\u7a0b\uff0c\u540c\u65f6\u5411\u524d\u7aef\u63d0\u4f9b\u5b9e\u65f6\u72b6\u6001\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e0b\u5355\u5165\u53e3<\/strong>\uff1a<br>\u7528\u6237\u4e0b\u5355\u65f6\uff0c\u8ba2\u5355\u670d\u52a1\u5148\u8c03\u7528\u9650\u6d41\u7ec4\u4ef6\uff1a\n<ul class=\"wp-block-list\">\n<li>\u672a\u8d85\u9608\u503c\uff1a\u76f4\u63a5\u5904\u7406\u8ba2\u5355\uff08\u66f4\u65b0\u72b6\u6001\u4e3a \u201c\u5904\u7406\u4e2d\u201d\uff09\u3002<\/li>\n\n\n\n<li>\u5df2\u8d85\u9608\u503c\uff1a\u5c06\u8ba2\u5355\u72b6\u6001\u8bbe\u4e3a \u201c\u6392\u961f\u4e2d\u201d\uff0c\u53d1\u9001\u5230 MQ \u961f\u5217\uff0c\u5e76\u8fd4\u56de\u6392\u961f\u4f4d\u7f6e\uff08\u901a\u8fc7 RocketMQ \u7684\u961f\u5217\u504f\u79fb\u91cf\u8ba1\u7b97\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u72b6\u6001\u540c\u6b65<\/strong>\uff1a<br>\u63d0\u4f9b<code>getOrderStatus<\/code>\u63a5\u53e3\uff0c\u524d\u7aef\u53ef\u67e5\u8be2\u8ba2\u5355\u662f\u5426\u5728\u6392\u961f\u3001\u5f53\u524d\u4f4d\u7f6e\u3001\u9884\u8ba1\u7b49\u5f85\u65f6\u95f4\uff08\u57fa\u4e8e\u961f\u5217\u957f\u5ea6\u548c\u5546\u6237\u5904\u7406\u80fd\u529b\u4f30\u7b97\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e09\u3001\u5173\u952e\u6280\u672f\u7279\u6027\u4e0e\u4f18\u52bf<\/h1>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u7edd\u5bf9\u987a\u5e8f\u6027<\/strong>\uff1a<br>\u540c\u4e00\u5546\u6237\u7684\u8ba2\u5355\u901a\u8fc7 \u201c\u56fa\u5b9a\u961f\u5217 + \u987a\u5e8f\u6d88\u8d39\u201d \u4fdd\u8bc1\u8001\u8ba2\u5355\u6c38\u8fdc\u5728\u65b0\u8ba2\u5355\u524d\u5904\u7406\uff0c\u907f\u514d\u63d2\u961f\u3002<\/li>\n\n\n\n<li><strong>\u52a8\u6001\u9002\u914d<\/strong>\uff1a<br>\u9608\u503c\u53ef\u5b9e\u65f6\u8c03\u6574\uff08\u5982\u9ad8\u5cf0\u671f\u4e34\u65f6\u63d0\u9ad8\u70ed\u95e8\u5546\u6237\u9608\u503c\uff09\uff0c\u8ba2\u5355\u5904\u7406\u901f\u5ea6\u968f\u9608\u503c\u81ea\u52a8\u53d8\u5316\u3002<\/li>\n\n\n\n<li><strong>\u9ad8\u53ef\u9760\u6027<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>RocketMQ \u6d88\u606f\u6301\u4e45\u5316\u907f\u514d\u8ba2\u5355\u4e22\u5931\uff1b<\/li>\n\n\n\n<li>\u6b7b\u4fe1\u961f\u5217\u673a\u5236\u515c\u5e95\u5f02\u5e38\u8ba2\u5355\uff1b<\/li>\n\n\n\n<li>Redis \u8ba1\u6570\u81ea\u5e26\u8fc7\u671f\u65f6\u95f4\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7528\u6237\u4f53\u9a8c\u4f18\u5316<\/strong>\uff1a<br>\u524d\u7aef\u53ef\u5b9e\u65f6\u5c55\u793a\u6392\u961f\u4f4d\u7f6e\u548c\u9884\u8ba1\u7b49\u5f85\u65f6\u95f4\uff0c\u51cf\u5c11\u7528\u6237\u7126\u8651\u3002<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u56db\u3001\u603b\u7ed3<\/h1>\n\n\n\n<p>\u8be5\u7cfb\u7edf\u901a\u8fc7 \u201cRedis \u9650\u6d41 + MQ \u6709\u5e8f\u961f\u5217\u201d \u7684\u7ec4\u5408\uff0c\u65e2\u89e3\u51b3\u4e86\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u7684\u8ba1\u6570\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u53c8\u4fdd\u8bc1\u4e86\u8ba2\u5355\u7684\u987a\u5e8f\u6027\u548c\u53ef\u9760\u6027\u3002\u6838\u5fc3\u4eae\u70b9\u5728\u4e8e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7528<strong>\u5206\u533a\u961f\u5217<\/strong>\u66ff\u4ee3\u5168\u5c40\u961f\u5217\uff0c\u5b9e\u73b0 \u201c\u5355\u5546\u6237\u987a\u5e8f + \u591a\u5546\u6237\u9694\u79bb\u201d\uff1b<\/li>\n\n\n\n<li>\u7528<strong>\u961f\u5217\u6302\u8d77<\/strong>\u66ff\u4ee3\u7ebf\u7a0b\u963b\u585e\uff0c\u5e73\u8861\u987a\u5e8f\u6027\u548c\u8d44\u6e90\u5229\u7528\u7387\uff1b<\/li>\n\n\n\n<li>\u7528<strong>\u52a8\u6001\u9608\u503c<\/strong>\u5e94\u5bf9\u6d41\u91cf\u6ce2\u52a8\uff0c\u517c\u987e\u5546\u6237\u8d1f\u8f7d\u548c\u7528\u6237\u4f53\u9a8c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u7279\u522b\u9002\u5408\u7a81\u53d1\u6027\u6d41\u91cf\u573a\u666f\uff0c\u65e2\u80fd\u4fdd\u62a4\u5546\u6237\u7cfb\u7edf\u4e0d\u88ab\u51b2\u57ae\uff0c\u53c8\u80fd\u8ba9\u7528\u6237\u6e05\u6670\u611f\u77e5\u7b49\u5f85\u72b6\u6001\uff0c\u662f\u7535\u5546\u9886\u57df\u7206\u5355\u95ee\u9898\u7684\u5178\u578b\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e94\u3001\u5177\u4f53\u5b9e\u73b0\uff1a<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1.&nbsp;\u9650\u6d41\u7ec4\u4ef6\uff08MerchantRateLimiter\uff09<\/h2>\n\n\n\n<p>\u57fa\u4e8e Redis \u5b9e\u73b0\u5206\u5e03\u5f0f\u73af\u5883\u4e0b\u7684\u5546\u6237\u8ba2\u5355\u8ba1\u6570\u548c\u9608\u503c\u63a7\u5236\uff0c\u652f\u6301\u52a8\u6001\u8c03\u6574\u9608\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class MerchantRateLimiter {\n    private final StringRedisTemplate redisTemplate;\n    \/\/ \u5546\u6237\u9608\u503c\u6620\u5c04\uff08\u4ece\u914d\u7f6e\u4e2d\u5fc3\u6216\u6570\u636e\u5e93\u52a0\u8f7d\uff09\n    private final Map&lt;Long, Integer> merchantThresholds;\n    \/\/ \u9ed8\u8ba4\u9608\u503c\uff08\u672a\u914d\u7f6e\u7684\u5546\u6237\u4f7f\u7528\uff09\n    private final int defaultThreshold;\n    \/\/ Redis\u4e2d\u6d3b\u8dc3\u8ba2\u5355\u6570\u7684key\u524d\u7f00\n    private static final String ACTIVE_ORDERS_KEY_PREFIX = \"merchant:active:orders:\";\n    \/\/ Redis\u4e2d\u5546\u6237\u9608\u503c\u7684key\u524d\u7f00\uff08\u652f\u6301\u52a8\u6001\u66f4\u65b0\uff09\n    private static final String THRESHOLD_KEY_PREFIX = \"merchant:threshold:\";\n\n    \/\/ \u6784\u9020\u51fd\u6570\uff1a\u6ce8\u5165Redis\u548c\u521d\u59cb\u9608\u503c\u914d\u7f6e\n    public MerchantRateLimiter(\n            StringRedisTemplate redisTemplate,\n            @Value(\"#{${merchant.thresholds:{}}}\") Map&lt;Long, Integer> merchantThresholds,\n            @Value(\"${merchant.default-threshold:100}\") int defaultThreshold\n    ) {\n        this.redisTemplate = redisTemplate;\n        this.merchantThresholds = merchantThresholds;\n        this.defaultThreshold = defaultThreshold;\n        \n        \/\/ \u521d\u59cb\u5316\u65f6\u5c06\u9608\u503c\u52a0\u8f7d\u5230Redis\uff0c\u652f\u6301\u540e\u7eed\u52a8\u6001\u66f4\u65b0\n        initThresholdsToRedis();\n    }\n    \n    \/**\n     * \u521d\u59cb\u5316\u65f6\u5c06\u5546\u6237\u9608\u503c\u52a0\u8f7d\u5230Redis\n     *\/\n    private void initThresholdsToRedis() {\n        for (Map.Entry&lt;Long, Integer> entry : merchantThresholds.entrySet()) {\n            redisTemplate.opsForValue().set(\n                THRESHOLD_KEY_PREFIX + entry.getKey(), \n                entry.getValue().toString()\n            );\n        }\n    }\n\n    \/**\n     * \u5c1d\u8bd5\u83b7\u53d6\u5546\u6237\u8ba2\u5355\u5904\u7406\u6743\u9650\n     * @param merchantId \u5546\u6237ID\n     * @return true\uff1a\u672a\u8fbe\u9608\u503c\uff08\u53ef\u5904\u7406\uff09\uff1bfalse\uff1a\u5df2\u7206\u5355\uff08\u9700\u6392\u961f\uff09\n     *\/\n    public boolean tryAcquire(Long merchantId) {\n        \/\/ 1. \u83b7\u53d6\u8be5\u5546\u6237\u7684\u5f53\u524d\u9608\u503c\uff08\u4f18\u5148\u4eceRedis\u83b7\u53d6\uff0c\u652f\u6301\u52a8\u6001\u66f4\u65b0\uff09\n        int threshold = getCurrentThreshold(merchantId);\n        \n        \/\/ 2. \u751f\u6210Redis\u8ba1\u6570\u952e\n        String key = ACTIVE_ORDERS_KEY_PREFIX + merchantId;\n        \n        \/\/ 3. \u539f\u5b50\u9012\u589e\u5e76\u83b7\u53d6\u5f53\u524d\u6d3b\u8dc3\u8ba2\u5355\u6570\uff08Redis\u4fdd\u8bc1\u5e76\u53d1\u5b89\u5168\uff09\n        Long currentActive = redisTemplate.opsForValue().increment(key, 1);\n        \n        \/\/ 4. \u9996\u6b21\u8ba1\u6570\u65f6\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0824\u5c0f\u65f6\uff0c\u907f\u514d\u65e0\u6548key\u5806\u79ef\uff09\n        if (currentActive != null &amp;&amp; currentActive == 1) {\n            redisTemplate.expire(key, 24, TimeUnit.HOURS);\n        }\n        \n        \/\/ 5. \u5224\u65ad\u662f\u5426\u8d85\u8fc7\u9608\u503c\uff1a\u672a\u8d85\u8fc7\u5219\u4fdd\u7559\u8ba1\u6570\uff0c\u8d85\u8fc7\u5219\u56de\u9000\n        if (currentActive != null &amp;&amp; currentActive &lt;= threshold) {\n            return true; \/\/ \u5141\u8bb8\u5904\u7406\n        } else {\n            redisTemplate.opsForValue().decrement(key, 1); \/\/ \u56de\u9000\u8ba1\u6570\n            return false; \/\/ \u89e6\u53d1\u9650\u6d41\n        }\n    }\n\n    \/**\n     * \u91ca\u653e\u5546\u6237\u8ba2\u5355\u5904\u7406\u5bb9\u91cf\uff08\u8ba2\u5355\u5b8c\u6210\/\u53d6\u6d88\u65f6\u8c03\u7528\uff09\n     * @param merchantId \u5546\u6237ID\n     *\/\n    public void release(Long merchantId) {\n        String key = ACTIVE_ORDERS_KEY_PREFIX + merchantId;\n        Long currentActive = redisTemplate.opsForValue().decrement(key, 1);\n        \/\/ \u82e5\u8ba1\u6570\u5f520\uff0c\u5220\u9664key\u8282\u7701\u5185\u5b58\n        if (currentActive != null &amp;&amp; currentActive &lt;= 0) {\n            redisTemplate.delete(key);\n        }\n    }\n\n    \/**\n     * \u91cd\u7f6e\u5546\u6237\u6d3b\u8dc3\u8ba2\u5355\u6570\uff08\u7528\u4e8e\u5f02\u5e38\u573a\u666f\u6062\u590d\uff09\n     *\/\n    public void reset(Long merchantId) {\n        redisTemplate.delete(ACTIVE_ORDERS_KEY_PREFIX + merchantId);\n    }\n    \n    \/**\n     * \u83b7\u53d6\u5546\u6237\u5f53\u524d\u9608\u503c\uff08\u652f\u6301\u52a8\u6001\u66f4\u65b0\uff09\n     *\/\n    public int getCurrentThreshold(Long merchantId) {\n        String thresholdStr = redisTemplate.opsForValue().get(THRESHOLD_KEY_PREFIX + merchantId);\n        if (thresholdStr != null) {\n            return Integer.parseInt(thresholdStr);\n        }\n        \/\/ \u82e5Redis\u4e2d\u65e0\u503c\uff0c\u4f7f\u7528\u9ed8\u8ba4\u9608\u503c\n        return defaultThreshold;\n    }\n    \n    \/**\n     * \u52a8\u6001\u66f4\u65b0\u5546\u6237\u9608\u503c\uff08\u4f9b\u7ba1\u7406\u540e\u53f0\u8c03\u7528\uff09\n     *\/\n    public void updateThreshold(Long merchantId, int newThreshold) {\n        redisTemplate.opsForValue().set(\n            THRESHOLD_KEY_PREFIX + merchantId, \n            String.valueOf(newThreshold)\n        );\n    }\n    \n    \/**\n     * \u83b7\u53d6\u5546\u6237\u5f53\u524d\u6d3b\u8dc3\u8ba2\u5355\u6570\uff08\u7528\u4e8e\u524d\u7aef\u5c55\u793a\uff09\n     *\/\n    public int getCurrentActiveOrders(Long merchantId) {\n        String value = redisTemplate.opsForValue().get(ACTIVE_ORDERS_KEY_PREFIX + merchantId);\n        return value != null ? Integer.parseInt(value) : 0;\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u6d88\u606f\u751f\u4ea7\u8005\uff08OrderQueueProducer\uff09<\/h2>\n\n\n\n<p>\u5c06\u8d85\u51fa\u9608\u503c\u7684\u8ba2\u5355\u53d1\u9001\u5230 RocketMQ\uff0c\u786e\u4fdd\u540c\u4e00\u5546\u6237\u7684\u8ba2\u5355\u8fdb\u5165\u56fa\u5b9a\u961f\u5217\uff0c\u4fdd\u8bc1\u987a\u5e8f\u6027\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class OrderQueueProducer {\n    private final RocketMQTemplate rocketMQTemplate;\n    private final String orderTopic;\n    \n    \/\/ \u4ece\u914d\u7f6e\u6587\u4ef6\u8bfb\u53d6\u4e3b\u9898\u540d\u79f0\n    public OrderQueueProducer(\n            RocketMQTemplate rocketMQTemplate, \n            @Value(\"${rocketmq.order-topic:MERCHANT_ORDER_QUEUE}\") String orderTopic\n    ) {\n        this.rocketMQTemplate = rocketMQTemplate;\n        this.orderTopic = orderTopic;\n    }\n\n    \/**\n     * \u53d1\u9001\u8ba2\u5355\u5230MQ\u961f\u5217\n     * @param order \u8ba2\u5355\u5bf9\u8c61\n     *\/\n    public void sendToQueue(Order order) {\n        \/\/ \u5305\u88c5\u6210\u6d88\u606f\u5bf9\u8c61\uff0c\u5305\u542b\u91cd\u8bd5\u8ba1\u6570\n        OrderMessage message = new OrderMessage(order);\n        \n        \/\/ \u4f7f\u7528convertAndSend\u65b9\u6cd5\uff0c\u81ea\u52a8\u5e8f\u5217\u5316\n        rocketMQTemplate.convertAndSend(\n            orderTopic,\n            message,\n            order.getMerchantId(),  \/\/ \u5206\u533a\u952e\uff1a\u5546\u6237ID\n            new MessageQueueSelector() {\n                @Override\n                public MessageQueue select(List&lt;MessageQueue> mqs, Message&lt;?> msg, Object arg) {\n                    \/\/ \u6309\u5546\u6237ID\u54c8\u5e0c\u6620\u5c04\u5230\u56fa\u5b9a\u961f\u5217\uff0c\u786e\u4fdd\u540c\u4e00\u5546\u6237\u8ba2\u5355\u987a\u5e8f\n                    Long merchantId = (Long) arg;\n                    return mqs.get((int) (merchantId % mqs.size()));\n                }\n            }\n        );\n    }\n    \n    \/**\n     * \u83b7\u53d6\u5546\u6237\u5f53\u524d\u6392\u961f\u6570\u91cf\uff08\u7528\u4e8e\u524d\u7aef\u5c55\u793a\uff09\n     *\/\n    public long getQueueSize(Long merchantId) throws MQClientException {\n        \/\/ \u83b7\u53d6\u6307\u5b9a\u4e3b\u9898\u7684\u6240\u6709\u961f\u5217\n        Set&lt;MessageQueue> mqs = rocketMQTemplate.getProducer().fetchSubscribeMessageQueues(orderTopic);\n        \n        long totalSize = 0;\n        for (MessageQueue mq : mqs) {\n            \/\/ \u53ea\u7edf\u8ba1\u5f53\u524d\u5546\u6237\u5bf9\u5e94\u7684\u961f\u5217\n            if (mq.getQueueId() == (int) (merchantId % mqs.size())) {\n                \/\/ \u83b7\u53d6\u961f\u5217\u6d88\u606f\u6570\u91cf\n                long offset = rocketMQTemplate.getProducer().maxOffset(mq);\n                long consumerOffset = rocketMQTemplate.getConsumer().fetchConsumeOffset(mq, true);\n                totalSize = offset - consumerOffset;\n                break;\n            }\n        }\n        return totalSize;\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">3.\u6d88\u606f\u6d88\u8d39\u8005\uff08OrderQueueConsumer\uff09<\/h2>\n\n\n\n<p>\u4ece RocketMQ \u6d88\u8d39\u8ba2\u5355\uff0c\u6309\u987a\u5e8f\u5904\u7406\uff0c\u652f\u6301\u6709\u9650\u6b21\u91cd\u8bd5\u548c\u56fa\u5b9a\u95f4\u9694\u3002\uff08\u6b64\u5904\u8bbe\u8ba1\u4e3a\u8ba2\u5355\u6700\u591a\u6392\u961f30min\uff0c\u5426\u5219\u8fdb\u5165\u6b7b\u4fe1\u961f\u5217\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Component\npublic class OrderQueueConsumer {\n    private final DefaultMQPushConsumer consumer;\n    private final MerchantRateLimiter rateLimiter;\n    private final OrderProcessor orderProcessor;\n    private final RocketMQTemplate rocketMQTemplate;\n    private static final int MAX_RETRY = 60; \/\/ \u6700\u5927\u91cd\u8bd5\u6b21\u6570\n    private static final long RETRY_INTERVAL = 30000L; \/\/ 30\u79d2\u91cd\u8bd5\u95f4\u9694\n\n    public OrderQueueConsumer(\n            @Value(\"${rocketmq.name-server}\") String nameServer,\n            @Value(\"${rocketmq.order-topic}\") String orderTopic,\n            @Value(\"${rocketmq.consumer-group}\") String consumerGroup,\n            MerchantRateLimiter rateLimiter,\n            OrderProcessor orderProcessor,\n            RocketMQTemplate rocketMQTemplate\n    ) throws MQClientException {\n        this.rateLimiter = rateLimiter;\n        this.orderProcessor = orderProcessor;\n        this.rocketMQTemplate = rocketMQTemplate;\n\n        \/\/ \u521d\u59cb\u5316\u6d88\u8d39\u8005\n        consumer = new DefaultMQPushConsumer(consumerGroup);\n        consumer.setNamesrvAddr(nameServer);\n        consumer.subscribe(orderTopic, \"*\");\n        \n        \/\/ \u8bbe\u7f6e\u6d88\u8d39\u6a21\u5f0f\u4e3a\u96c6\u7fa4\u6a21\u5f0f\n        consumer.setMessageModel(MessageModel.CLUSTERING);\n\n        \/\/ \u6ce8\u518c\u987a\u5e8f\u6d88\u606f\u76d1\u542c\u5668\uff08\u4fdd\u8bc1\u961f\u5217\u5185\u6d88\u606f\u987a\u5e8f\uff09\n        consumer.registerMessageListener((MessageListenerOrderly) (msgs, context) -> {\n            MessageExt msg = msgs.get(0);\n            OrderMessage orderMessage = JSON.parseObject(msg.getBody(), OrderMessage.class);\n            Order order = orderMessage.getOrder();\n            Long merchantId = order.getMerchantId();\n            \n            \/\/ \u91cd\u8bd5\u6b21\u6570\u7d2f\u52a0\uff08\u7ed3\u5408\u6d88\u606f\u81ea\u5e26\u7684\u91cd\u8bd5\u8ba1\u6570\uff09\n            int retryCount = orderMessage.getRetryCount() + msg.getReconsumeTimes();\n            orderMessage.setRetryCount(retryCount);\n\n            \/\/ \u8d85\u8fc7\u6700\u5927\u91cd\u8bd5\u6b21\u6570\uff0c\u8fdb\u5165\u6b7b\u4fe1\u961f\u5217\n            if (retryCount >= MAX_RETRY) {\n                sendToDeadLetterQueue(order);\n                return ConsumeOrderlyStatus.SUCCESS; \/\/ \u63d0\u4ea4\u4f4d\u70b9\uff0c\u79fb\u9664\u6d88\u606f\n            }\n\n            \/\/ \u5c1d\u8bd5\u83b7\u53d6\u5546\u5bb6\u9650\u6d41\u4ee4\u724c\n            if (rateLimiter.tryAcquire(merchantId)) {\n                try {\n                    \/\/ \u5904\u7406\u8ba2\u5355\n                    orderProcessor.process(order);\n                    return ConsumeOrderlyStatus.SUCCESS; \/\/ \u6210\u529f\u5904\u7406\uff0c\u63d0\u4ea4\u4f4d\u70b9\n                } finally {\n                    \/\/ \u91ca\u653e\u4ee4\u724c\n                    rateLimiter.release(merchantId);\n                }\n            } else {\n                \/\/ \u5546\u5bb6\u8ba2\u5355\u5904\u7406\u53d7\u9650\uff0c\u6302\u8d77\u961f\u521730s\u540e\u91cd\u8bd5\n                context.setSuspendCurrentQueueTimeMillis(RETRY_INTERVAL);\n                System.out.printf(\"\u5546\u5bb6%d\u7684\u8ba2\u5355%s\u8fbe\u5230\u901f\u7387\u9650\u5236\uff0c\u6302\u8d77\u961f\u521730s\u540e\u91cd\u8bd5\uff0c\u91cd\u8bd5\u6b21\u6570\uff1a%d%n\",\n                        merchantId, order.getId(), retryCount);\n                \n                \/\/ \u8fd4\u56de\u6302\u8d77\u72b6\u6001\uff0c\u4fdd\u8bc1\u5355\u5546\u5bb6\u987a\u5e8f\n                return ConsumeOrderlyStatus.SUSPEND_CURRENT_QUEUE_A_MOMENT;\n            }\n        });\n\n        \/\/ \u542f\u52a8\u6d88\u8d39\u8005\n        consumer.start();\n    }\n\n    \/**\n     * \u53d1\u9001\u5230\u6b7b\u4fe1\u961f\u5217\n     *\/\n    private void sendToDeadLetterQueue(Order order) {\n        System.err.println(\"\u8ba2\u5355\" + order.getId() + \"\u8d85\u8fc7\u6700\u5927\u91cd\u8bd5\u6b21\u6570\uff0c\u5df2\u8fdb\u5165\u6b7b\u4fe1\u961f\u5217\");\n        \/\/ \u5b9e\u9645\u5e94\u7528\u4e2d\u53ef\u4ee5\u53d1\u9001\u5230\u4e13\u95e8\u7684\u6b7b\u4fe1\u4e3b\u9898\n        rocketMQTemplate.convertAndSend(\"ORDER_DLQ_TOPIC\", order);\n    }\n    \n    @PreDestroy\n    public void destroy() {\n        if (consumer != null) {\n            consumer.shutdown();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">4.\u8ba2\u5355\u5904\u7406\u5668\uff08OrderProcessor\uff09<\/h2>\n\n\n\n<p>\u5904\u7406\u8ba2\u5355\u7684\u5b9e\u9645\u4e1a\u52a1\u903b\u8f91\uff0c\u5982\u901a\u77e5\u5546\u6237\u3001\u66f4\u65b0\u5e93\u5b58\u7b49\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Service\npublic class OrderProcessor {\n    private final OrderRepository orderRepository;\n    private final MerchantService merchantService;\n    private final NotificationService notificationService;\n    \n    \/\/ \u6784\u9020\u51fd\u6570\u6ce8\u5165\u4f9d\u8d56\n    public OrderProcessor(OrderRepository orderRepository, \n                         MerchantService merchantService,\n                         NotificationService notificationService) {\n        this.orderRepository = orderRepository;\n        this.merchantService = merchantService;\n        this.notificationService = notificationService;\n    }\n    \n    \/**\n     * \u5904\u7406\u8ba2\u5355\u7684\u6838\u5fc3\u4e1a\u52a1\u903b\u8f91\n     *\/\n    public void process(Order order) {\n        try {\n            \/\/ 1. \u66f4\u65b0\u8ba2\u5355\u72b6\u6001\u4e3a\u5904\u7406\u4e2d\n            order.setStatus(\"PROCESSING\");\n            orderRepository.updateById(order);\n            \n            \/\/ 2. \u68c0\u67e5\u5e93\u5b58\n            boolean stockAvailable = merchantService.checkAndDeductStock(\n                order.getMerchantId(), \n                order.getProduct()\n            );\n            \n            if (!stockAvailable) {\n                \/\/ \u5e93\u5b58\u4e0d\u8db3\uff0c\u66f4\u65b0\u8ba2\u5355\u72b6\u6001\n                order.setStatus(\"OUT_OF_STOCK\");\n                orderRepository.updateById(order);\n                \/\/ \u901a\u77e5\u7528\u6237\n                notificationService.notifyUser(order.getUserId(), \n                    \"\u8ba2\u5355\" + order.getId() + \"\u56e0\u5e93\u5b58\u4e0d\u8db3\u65e0\u6cd5\u5904\u7406\");\n                return;\n            }\n            \n            \/\/ 3. \u901a\u77e5\u5546\u6237\u6709\u65b0\u8ba2\u5355\n            merchantService.notifyNewOrder(order);\n            \n            \/\/ 4. \u66f4\u65b0\u8ba2\u5355\u72b6\u6001\u4e3a\u5df2\u63a5\u53d7\n            order.setStatus(\"ACCEPTED\");\n            orderRepository.updateById(order);\n            \n            \/\/ 5. \u901a\u77e5\u7528\u6237\u8ba2\u5355\u5df2\u53d7\u7406\n            notificationService.notifyUser(order.getUserId(), \n                \"\u8ba2\u5355\" + order.getId() + \"\u5df2\u53d7\u7406\uff0c\u6b63\u5728\u5236\u4f5c\u4e2d\");\n                \n        } catch (Exception e) {\n            \/\/ \u5904\u7406\u5f02\u5e38\uff0c\u66f4\u65b0\u8ba2\u5355\u72b6\u6001\n            order.setStatus(\"PROCESSING_FAILED\");\n            orderRepository.updateById(order);\n            throw new RuntimeException(\"\u8ba2\u5355\u5904\u7406\u5931\u8d25: \" + e.getMessage(), e);\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">5.\u8ba2\u5355\u670d\u52a1\uff08OrderService\uff09<\/h2>\n\n\n\n<p>\u6574\u5408\u9650\u6d41\u903b\u8f91\u548c\u8ba2\u5355\u5904\u7406\u6d41\u7a0b\uff0c\u662f\u7cfb\u7edf\u7684\u5165\u53e3\u70b9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>@Service\npublic class OrderService {\n    private final MerchantRateLimiter rateLimiter;\n    private final OrderQueueProducer queueProducer;\n    private final OrderRepository orderRepository;\n    private final IdGenerator idGenerator;\n    \n    \/\/ \u6784\u9020\u51fd\u6570\u6ce8\u5165\u4f9d\u8d56\n    public OrderService(MerchantRateLimiter rateLimiter,\n                       OrderQueueProducer queueProducer,\n                       OrderRepository orderRepository,\n                       IdGenerator idGenerator) {\n        this.rateLimiter = rateLimiter;\n        this.queueProducer = queueProducer;\n        this.orderRepository = orderRepository;\n        this.idGenerator = idGenerator;\n    }\n    \n    \/**\n     * \u7528\u6237\u4e0b\u5355\u7684\u6838\u5fc3\u6d41\u7a0b\n     *\/\n    @Transactional\n    public OrderDTO createOrder(OrderCreateRequest request) {\n        \/\/ 1. \u751f\u6210\u8ba2\u5355\n        Order order = buildOrder(request);\n        orderRepository.insert(order);\n        \n        \/\/ 2. \u8c03\u7528\u9650\u6d41\u7ec4\u4ef6\u5224\u65ad\u662f\u5426\u53ef\u76f4\u63a5\u5904\u7406\n        if (rateLimiter.tryAcquire(order.getMerchantId())) {\n            try {\n                \/\/ 3. \u76f4\u63a5\u5904\u7406\u8ba2\u5355\n                order.setStatus(\"PROCESSING\");\n                orderRepository.updateById(order);\n                \n                \/\/ 4. \u8c03\u7528\u8ba2\u5355\u5904\u7406\u5668\u5904\u7406\u8ba2\u5355\n                orderProcessor.process(order);\n                \n                \/\/ 5. \u8fd4\u56de\u8ba2\u5355\u4fe1\u606f\n                return convertToDTO(order);\n            } finally {\n                \/\/ 6. \u91ca\u653e\u5bb9\u91cf\n                rateLimiter.release(order.getMerchantId());\n            }\n        } else {\n            \/\/ 7. \u5df2\u7206\u5355\uff0c\u53d1\u9001\u5230MQ\u6392\u961f\n            order.setStatus(\"PENDING\");\n            orderRepository.updateById(order);\n            \n            \/\/ 8. \u53d1\u9001\u5230\u961f\u5217\n            queueProducer.sendToQueue(order);\n            \n            \/\/ 9. \u83b7\u53d6\u6392\u961f\u4f4d\u7f6e\u4fe1\u606f\n            long queueSize;\n            try {\n                queueSize = queueProducer.getQueueSize(order.getMerchantId());\n            } catch (MQClientException e) {\n                \/\/ \u83b7\u53d6\u6392\u961f\u6570\u91cf\u5931\u8d25\u65f6\u7684\u964d\u7ea7\u5904\u7406\n                queueSize = -1;\n            }\n            \n            \/\/ 10. \u8fd4\u56de\u8ba2\u5355\u4fe1\u606f\u548c\u6392\u961f\u4f4d\u7f6e\n            OrderDTO dto = convertToDTO(order);\n            dto.setQueuePosition(queueSize);\n            dto.setEstimatedWaitingTime(calculateWaitingTime(queueSize, order.getMerchantId()));\n            return dto;\n        }\n    }\n    \n    \/**\n     * \u6784\u5efa\u8ba2\u5355\u5bf9\u8c61\n     *\/\n    private Order buildOrder(OrderCreateRequest request) {\n        Order order = new Order();\n        order.setId(idGenerator.generate());\n        order.setMerchantId(request.getMerchantId());\n        order.setUserId(request.getUserId());\n        order.setProduct(request.getProduct());\n        order.setCreateTime(LocalDateTime.now());\n        order.setStatus(\"CREATED\");\n        \/\/ \u8bbe\u7f6e\u5176\u4ed6\u8ba2\u5355\u5c5e\u6027...\n        return order;\n    }\n    \n    \/**\n     * \u8f6c\u6362\u4e3aDTO\u5bf9\u8c61\n     *\/\n    private OrderDTO convertToDTO(Order order) {\n        OrderDTO dto = new OrderDTO();\n        BeanUtils.copyProperties(order, dto);\n        \/\/ \u5176\u4ed6\u8f6c\u6362\u903b\u8f91...\n        return dto;\n    }\n    \n    \/**\n     * \u4f30\u7b97\u7b49\u5f85\u65f6\u95f4\n     *\/\n    private long calculateWaitingTime(long queueSize, Long merchantId) {\n        if (queueSize &lt;= 0) {\n            return 0;\n        }\n        \/\/ \u6839\u636e\u5546\u6237\u5904\u7406\u80fd\u529b\u4f30\u7b97\u7b49\u5f85\u65f6\u95f4\uff08\u79d2\uff09\n        int threshold = rateLimiter.getCurrentThreshold(merchantId);\n        \/\/ \u5047\u8bbe\u6bcf\u4e2a\u8ba2\u5355\u5e73\u5747\u5904\u7406\u65f6\u95f4\u4e3a2\u5206\u949f\n        return (long) (queueSize * 120.0 \/ threshold);\n    }\n    \n    \/**\n     * \u83b7\u53d6\u8ba2\u5355\u72b6\u6001\u548c\u7b49\u5f85\u8fdb\u5ea6\uff08\u4f9b\u524d\u7aef\u67e5\u8be2\uff09\n     *\/\n    public OrderStatusDTO getOrderStatus(String orderId) {\n        Order order = orderRepository.selectById(orderId);\n        if (order == null) {\n            throw new OrderNotFoundException(\"\u8ba2\u5355\u4e0d\u5b58\u5728: \" + orderId);\n        }\n        \n        OrderStatusDTO statusDTO = new OrderStatusDTO();\n        statusDTO.setOrderId(orderId);\n        statusDTO.setStatus(order.getStatus());\n        \n        \/\/ \u5982\u679c\u8ba2\u5355\u4ecd\u5728\u6392\u961f\uff0c\u67e5\u8be2\u6392\u961f\u4f4d\u7f6e\n        if (\"PENDING\".equals(order.getStatus())) {\n            try {\n                long queueSize = queueProducer.getQueueSize(order.getMerchantId());\n                statusDTO.setQueuePosition(queueSize);\n                statusDTO.setEstimatedWaitingTime(\n                    calculateWaitingTime(queueSize, order.getMerchantId())\n                );\n            } catch (MQClientException e) {\n                \/\/ \u5f02\u5e38\u5904\u7406\n            }\n        }\n        \n        return statusDTO;\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">6.\u914d\u7f6e\u6587\u4ef6\uff1a<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5546\u6237\u9608\u503c\u914d\u7f6e\nmerchant:\n  thresholds:\n    1001: 200  # \u5546\u62371001\u7684\u9608\u503c\u4e3a200\n    1002: 150  # \u5546\u62371002\u7684\u9608\u503c\u4e3a150\n  default-threshold: 100  # \u672a\u914d\u7f6e\u5546\u6237\u7684\u9ed8\u8ba4\u9608\u503c\n\n# \u81ea\u5b9a\u4e49RocketMQ\u4e3b\u9898\nrocketmq:\n  order-topic: MERCHANT_ORDER_QUEUE\n  dlq-topic: ORDER_DLQ_TOPIC<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9488\u5bf9\u7c7b\u4f3c\u4e8e\u201c\u79cb\u5929\u7684\u7b2c\u4e00\u676f\u5976\u8336\u201d\u5bfc\u81f4\u7684\u7206\u5355\u95ee\u9898\u573a\u666f\uff0c\u8bbe\u8ba1\u5e76\u5b9e\u73b0 \u9ad8\u5cf0\u671f\u5546\u6237\u52a8\u6001\u9650\u6d41\u4e0e\u6392\u961f\u673a\u5236\uff1a\u57fa\u4e8e Redis  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,66],"tags":[],"class_list":["post-1354","post","type-post","status-publish","format-standard","hentry","category-javaweblist","category-66"],"_links":{"self":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/1354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1354"}],"version-history":[{"count":3,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/1354\/revisions"}],"predecessor-version":[{"id":1357,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/1354\/revisions\/1357"}],"wp:attachment":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1354"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}