\u5165\u53e3 QPS<\/strong>\uff1a\u5f53\u5355\u53f0\u673a\u5668\u4e0a\u6240\u6709\u5165\u53e3\u6d41\u91cf\u7684 QPS \u8fbe\u5230\u9608\u503c\u5373\u89e6\u53d1\u7cfb\u7edf\u4fdd\u62a4\u3002<\/li>\n<\/ul>\n\n\n\n\u9650\u6d41\u548c\u5f02\u5e38\u5904\u7406<\/p>\n\n\n\n
\u4e4b\u524d\uff0c\u6211\u4eec\u5b66\u4e60\u4e86\u5982\u4f55\u8fdb\u884c\u9650\u6d41\u64cd\u4f5c\uff0c\u4f46\u6211\u4eec\u53d1\u73b0\u9650\u6d41\u4e4b\u540e\u8fd4\u56de\u7684\u662fSentinel\u9ed8\u8ba4\u7684\u6570\u636e\uff0c\uff0c\u90a3\u4e48\u6211\u4eec\u8be5\u5982\u4f55\u4fee\u6539\u9ed8\u8ba4\u6570\u636e\u5462\uff1f<\/p>\n\n\n\n
\u9996\u5148\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u9650\u6d41\u72b6\u6001\u4e0b\u9700\u8981\u8fd4\u56de\u7684\u5185\u5bb9\u3002\u5b9a\u4e49\u4e00\u4e2a\u8bf7\u6c42\u6620\u5c04\uff1a<\/p>\n\n\n\n
@RequestMapping(\"\/blocked\")\r\nJSONObject blocked(){\r\n JSONObject object = new JSONObject();\r\n object.put(\"code\", 403);\r\n object.put(\"success\", false);\r\n object.put(\"massage\", \"\u60a8\u7684\u8bf7\u6c42\u9891\u7387\u8fc7\u5feb\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\uff01\");\r\n return object;\r\n}<\/code><\/pre>\n\n\n\n\u518d\u5728\u914d\u7f6e\u6587\u4ef6\u91cc\u5c06\u5176\u8bbe\u7f6e\u4e3a\u9650\u6d41\u9875\u9762<\/p>\n\n\n\n
spring:\r\n cloud:\r\n sentinel:\r\n transport:\r\n dashboard: localhost:8858\r\n # \u5c06\u521a\u521a\u7f16\u5199\u7684\u8bf7\u6c42\u6620\u5c04\u8bbe\u5b9a\u4e3a\u9650\u6d41\u9875\u9762\r\n block-page: \/blocked<\/code><\/pre>\n\n\n\n\u8fd9\u6837\uff0c\u5f53\u88ab\u9650\u6d41\u65f6\uff0c\u5c31\u548c\u88ab\u91cd\u5b9a\u5411\u5230\u6307\u5b9a\u9875\u9762\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-11.png?resize=764%2C194&ssl=1\")
<\/figure>\n\n\n\n\u90a3\u4e48\uff0c\u5bf9\u4e8e\u65b9\u6cd5\u7ea7\u522b\u7684\u9650\u6d41\u5462\uff1f\u7ecf\u8fc7\u524d\u9762\u7684\u5b66\u4e60\u6211\u4eec\u77e5\u9053\uff0c\u5f53\u67d0\u4e2a\u65b9\u6cd5\u88ab\u9650\u6d41\u65f6\uff0c\u4f1a\u76f4\u63a5\u5728\u540e\u53f0\u629b\u51fa\u5f02\u5e38\uff0c\u90a3\u4e48\u8fd9\u79cd\u60c5\u51b5\u6211\u4eec\u8be5\u600e\u4e48\u5904\u7406\u5462\uff0c\u6bd4\u5982\u6211\u4eec\u4e4b\u524d\u5728Hystrix\u4e2d\u53ef\u4ee5\u76f4\u63a5\u6dfb\u52a0\u4e00\u4e2a\u66ff\u4ee3\u65b9\u6848\uff0c\u8fd9\u6837\u5f53\u51fa\u73b0\u5f02\u5e38\u65f6\u4f1a\u76f4\u63a5\u6267\u884c\u6211\u4eec\u7684\u66ff\u4ee3\u65b9\u6cd5\u5e76\u8fd4\u56de\uff0cSentinel\u4e5f\u53ef\u4ee5\u3002<\/p>\n\n\n\n
\u6bd4\u5982\u6211\u4eec\u8fd8\u662f\u5728getUserBorrowDetailByUid<\/code>\u65b9\u6cd5\u4e0a\u8fdb\u884c\u914d\u7f6e\uff1a<\/p>\n\n\n\n@Override\r\n@SentinelResource(value = \"getBorrow\", blockHandler = \"blocked\") \/\/\u6307\u5b9ablockHandler\uff0c\u4e5f\u5c31\u662f\u88ab\u9650\u6d41\u4e4b\u540e\u7684\u66ff\u4ee3\u89e3\u51b3\u65b9\u6848\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u4f7f\u7528\u9ed8\u8ba4\u7684\u629b\u51fa\u5f02\u5e38\u7684\u5f62\u5f0f\u4e86\r\npublic UserBorrowDetail getUserBorrowDetailByUid(int uid) {\r\n List<Borrow> borrow = mapper.getBorrowsByUid(uid);\r\n User user = userClient.getUserById(uid);\r\n List<Book> bookList = borrow\r\n .stream()\r\n .map(b -> bookClient.getBookById(b.getBid()))\r\n .collect(Collectors.toList());\r\n return new UserBorrowDetail(user, bookList);\r\n}\r\n\r\n\/\/\u66ff\u4ee3\u65b9\u6848\uff0c\u6ce8\u610f\u53c2\u6570\u548c\u8fd4\u56de\u503c\u9700\u8981\u4fdd\u6301\u4e00\u81f4\uff0c\u5e76\u4e14\u53c2\u6570\u6700\u540e\u8fd8\u9700\u8981\u989d\u5916\u6dfb\u52a0\u4e00\u4e2aBlockException\r\npublic UserBorrowDetail blocked(int uid, BlockException e) {\r\n return new UserBorrowDetail(null, Collections.emptyList());\r\n}<\/code><\/pre>\n\n\n\n\u8fd9\u6837\u4e00\u65e6\u65b9\u6cd5\u88ab\u9650\u6d41\uff0c\u5c31\u4f1a\u6267\u884c\u66ff\u4ee3\u65b9\u6848\u3002<\/p>\n\n\n\n
\u6ce8\u610fblockHandler<\/code>\u53ea\u80fd\u5904\u7406\u9650\u6d41\u60c5\u51b5\u4e0b\u629b\u51fa\u7684\u5f02\u5e38\uff0c\u5305\u62ec\u4e0b\u9762\u5373\u5c06\u8981\u4ecb\u7ecd\u7684\u70ed\u70b9\u53c2\u6570\u9650\u6d41\u4e5f\u662f\u540c\u7406\uff0c\u5982\u679c\u662f\u65b9\u6cd5\u672c\u8eab\u629b\u51fa\u7684\u5176\u4ed6\u7c7b\u578b\u5f02\u5e38\uff0c\u4e0d\u5728\u7ba1\u63a7\u8303\u56f4\u5185\uff0c\u4f46\u662f\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u53c2\u6570\u8fdb\u884c\u5904\u7406\uff1a<\/p>\n\n\n\n@RequestMapping(\"\/test\")\r\n@SentinelResource(value = \"test\",\r\n fallback = \"except\", \/\/fallback\u6307\u5b9a\u51fa\u73b0\u5f02\u5e38\u65f6\u7684\u66ff\u4ee3\u65b9\u6848\r\n exceptionsToIgnore = IOException.class) \/\/\u5ffd\u7565\u90a3\u4e9b\u5f02\u5e38\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e9b\u5f02\u5e38\u51fa\u73b0\u65f6\u4e0d\u4f7f\u7528\u66ff\u4ee3\u65b9\u6848\r\nString test(){\r\n throw new RuntimeException(\"HelloWorld\uff01\");\r\n}\r\n\r\n\/\/\u66ff\u4ee3\u65b9\u6cd5\u5fc5\u987b\u548c\u539f\u65b9\u6cd5\u8fd4\u56de\u503c\u548c\u53c2\u6570\u4e00\u81f4\uff0c\u6700\u540e\u53ef\u4ee5\u6dfb\u52a0\u4e00\u4e2aThrowable\u4f5c\u4e3a\u53c2\u6570\u63a5\u53d7\u5f02\u5e38\r\nString except(Throwable t){\r\n return t.getMessage();\r\n}<\/code><\/pre>\n\n\n\n\u7279\u522b\u6ce8\u610f\u8fd9\u79cd\u65b9\u5f0f\u4f1a\u5728\u6ca1\u6709\u914d\u7f6eblockHandler<\/code>\u7684\u60c5\u51b5\u4e0b\uff0c\u5c06Sentinel\u673a\u5236\u5185\uff08\u4e5f\u5c31\u662f\u9650\u6d41\u7684\u5f02\u5e38\uff09\u7684\u5f02\u5e38\u4e5f\u4e00\u5e76\u5904\u7406\u4e86\uff0c\u5982\u679c\u914d\u7f6e\u4e86blockHandler<\/code>\uff0c\u90a3\u4e48\u5728\u51fa\u73b0\u9650\u6d41\u65f6\uff0c\u4f9d\u7136\u53ea\u4f1a\u6267\u884cblockHandler<\/code>\u6307\u5b9a\u7684\u66ff\u4ee3\u65b9\u6848\uff08\u56e0\u4e3a\u9650\u6d41\u662f\u5728\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\u8fdb\u884c\u7684\uff09<\/p>\n\n\n\n<\/div>\n\n\n\n
\u70ed\u70b9\u53c2\u6570\u9650\u6d41<\/h2>\n\n\n\n
\u6211\u4eec\u8fd8\u53ef\u4ee5\u5bf9\u67d0\u4e00\u70ed\u70b9\u6570\u636e\u8fdb\u884c\u7cbe\u51c6\u9650\u6d41\uff0c\u6bd4\u5982\u5728\u67d0\u4e00\u65f6\u523b\uff0c\u4e0d\u540c\u53c2\u6570\u88ab\u643a\u5e26\u8bbf\u95ee\u7684\u9891\u7387\u662f\u4e0d\u4e00\u6837\u7684\uff1a<\/p>\n\n\n\n
\n- http:\/\/localhost:8301\/test?a=10 \u8bbf\u95ee100\u6b21<\/li>\n\n\n\n
- http:\/\/localhost:8301\/test?b=10 \u8bbf\u95ee0\u6b21<\/li>\n\n\n\n
- http:\/\/localhost:8301\/test?c=10 \u8bbf\u95ee3\u6b21<\/li>\n<\/ul>\n\n\n\n
\u7531\u4e8e\u643a\u5e26\u53c2\u6570a<\/code>\u7684\u8bf7\u6c42\u6bd4\u8f83\u591a\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u53ea\u5bf9\u643a\u5e26\u53c2\u6570a<\/code>\u7684\u8bf7\u6c42\u8fdb\u884c\u9650\u6d41\u3002<\/p>\n\n\n\n\u8fd9\u91cc\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6d4b\u8bd5\u8bf7\u6c42\u6620\u5c04\uff1a<\/p>\n\n\n\n
@RequestMapping(\"\/test\")\r\n@SentinelResource(\"test\") \/\/\u6ce8\u610f\u8fd9\u91cc\u9700\u8981\u6dfb\u52a0@SentinelResource\u624d\u53ef\u4ee5\uff0c\u7528\u6237\u8d44\u6e90\u540d\u79f0\u5c31\u4f7f\u7528\u8fd9\u91cc\u5b9a\u4e49\u7684\u8d44\u6e90\u540d\u79f0\r\nString findUserBorrows2(@RequestParam(value = \"a\", required = false) int a,\r\n @RequestParam(value = \"b\", required = false) int b,\r\n @RequestParam(value = \"c\",required = false) int c) {\r\n return \"\u8bf7\u6c42\u6210\u529f\uff01a = \"+a+\", b = \"+b+\", c = \"+c;\r\n}<\/code><\/pre>\n\n\n\n\u542f\u52a8\u4e4b\u540e\uff0c\u6211\u4eec\u5728Sentinel\u91cc\u9762\u8fdb\u884c\u70ed\u70b9\u914d\u7f6e\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-12.png?resize=1024%2C343&ssl=1\")
<\/figure>\n\n\n\n\u7136\u540e\u5f00\u59cb\u8bbf\u95ee\u6211\u4eec\u7684\u6d4b\u8bd5\u63a5\u53e3\uff0c\u53ef\u4ee5\u770b\u5230\u5728\u643a\u5e26\u53c2\u6570a\u65f6\uff0c\u5f53\u8bbf\u95ee\u9891\u7387\u8d85\u8fc7\u8bbe\u5b9a\u503c\uff0c\u5c31\u4f1a\u76f4\u63a5\u88ab\u9650\u6d41\uff0c\u8fd9\u91cc\u662f\u76f4\u63a5\u5728\u540e\u53f0\u629b\u51fa\u5f02\u5e38\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-13.png?resize=899%2C324&ssl=1\")
<\/figure>\n\n\n\n\u9664\u4e86\u76f4\u63a5\u5bf9\u67d0\u4e2a\u53c2\u6570\u7cbe\u51c6\u9650\u6d41\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5bf9\u53c2\u6570\u643a\u5e26\u7684\u6307\u5b9a\u503c\u5355\u72ec\u8bbe\u5b9a\u9608\u503c\uff0c\u6bd4\u5982\u6211\u4eec\u73b0\u5728\u4e0d\u4ec5\u5e0c\u671b\u5bf9\u53c2\u6570a<\/code>\u9650\u6d41\uff0c\u800c\u4e14\u8fd8\u5e0c\u671b\u5f53\u53c2\u6570a<\/code>\u7684\u503c\u4e3a10\u65f6\uff0cQPS\u8fbe\u52305\u518d\u8fdb\u884c\u9650\u6d41\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u8bbe\u5b9a\u4f8b\u5916\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-14.png?resize=1024%2C414&ssl=1\")
<\/figure>\n\n\n\n\u8fd9\u6837\uff0c\u5f53\u8bf7\u6c42\u643a\u5e26\u53c2\u6570a<\/code>\uff0c\u4e14\u53c2\u6570a<\/code>\u7684\u503c\u4e3a10\u65f6\uff0c\u9608\u503c\u5c06\u6309\u7167\u6211\u4eec\u6307\u5b9a\u7684\u7279\u4f8b\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n\n\n\n<\/div>\n\n\n\n
\u670d\u52a1\u7194\u65ad\u548c\u964d\u7ea7<\/h2>\n\n\n\n
\u5982\u679c\u5728\u67d0\u4e00\u65f6\u523b\uff0c\u670d\u52a1B\u51fa\u73b0\u6545\u969c\uff08\u53ef\u80fd\u5c31\u5361\u5728\u90a3\u91cc\u4e86\uff09\uff0c\u800c\u8fd9\u65f6\u670d\u52a1A\u4f9d\u7136\u6709\u5927\u91cf\u7684\u8bf7\u6c42\uff0c\u5728\u8c03\u7528\u670d\u52a1B\uff0c\u90a3\u4e48\uff0c\u7531\u4e8e\u670d\u52a1A\u6ca1\u529e\u6cd5\u518d\u77ed\u65f6\u95f4\u5185\u5b8c\u6210\u5904\u7406\uff0c\u65b0\u6765\u7684\u8bf7\u6c42\u5c31\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u6570\u4e0d\u65ad\u5730\u589e\u52a0\uff0c\u8fd9\u6837\uff0cCPU\u7684\u8d44\u6e90\u5f88\u5feb\u5c31\u4f1a\u88ab\u8017\u5c3d\u3002<\/p>\n\n\n\n
\u90a3\u4e48\u8981\u9632\u6b62\u8fd9\u79cd\u60c5\u51b5\uff0c\u5c31\u53ea\u80fd\u8fdb\u884c\u9694\u79bb\u4e86\uff0c\u8fd9\u91cc\u6211\u4eec\u63d0\u4e24\u79cd\u9694\u79bb\u65b9\u6848\uff1a<\/p>\n\n\n\n
1.\u7ebf\u7a0b\u6c60\u9694\u79bb<\/strong><\/p>\n\n\n\n\u7ebf\u7a0b\u6c60\u9694\u79bb\u5b9e\u9645\u4e0a\u5c31\u662f\u5bf9\u6bcf\u4e2a\u670d\u52a1\u7684\u8fdc\u7a0b\u8c03\u7528\u5355\u72ec\u5f00\u653e\u7ebf\u7a0b\u6c60\uff0c\u6bd4\u5982\u670d\u52a1A\u8981\u8c03\u7528\u670d\u52a1B\uff0c\u90a3\u4e48\u53ea\u57fa\u4e8e\u56fa\u5b9a\u6570\u91cf\u7684\u7ebf\u7a0b\u6c60\uff0c\u8fd9\u6837\u5373\u4f7f\u5728\u77ed\u65f6\u95f4\u5185\u51fa\u73b0\u5927\u91cf\u8bf7\u6c42\uff0c\u7531\u4e8e\u6ca1\u6709\u7ebf\u7a0b\u53ef\u4ee5\u5206\u914d\uff0c\u6240\u4ee5\u5c31\u4e0d\u4f1a\u5bfc\u81f4\u8d44\u6e90\u8017\u5c3d\u4e86\u3002<\/p>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-16.png?resize=1024%2C240&ssl=1\")
<\/figure>\n\n\n\n2.\u4fe1\u53f7\u91cf\u9694\u79bb<\/strong><\/p>\n\n\n\n\u4fe1\u53f7\u91cf\u9694\u79bb\u662f\u4f7f\u7528Semaphore<\/code>\u7c7b\u5b9e\u73b0\u7684\uff08\u5982\u679c\u4e0d\u4e86\u89e3\uff0c\u53ef\u4ee5\u89c2\u770b\u672c\u7cfb\u5217 \u5e76\u53d1\u7f16\u7a0b\u7bc7 \u89c6\u9891\u6559\u7a0b\uff09\uff0c\u601d\u60f3\u57fa\u672c\u4e0a\u4e0e\u4e0a\u9762\u662f\u76f8\u540c\u7684\uff0c\u4e5f\u662f\u9650\u5b9a\u6307\u5b9a\u7684\u7ebf\u7a0b\u6570\u91cf\u80fd\u591f\u540c\u65f6\u8fdb\u884c\u670d\u52a1\u8c03\u7528\uff0c\u4f46\u662f\u5b83\u76f8\u5bf9\u4e8e\u7ebf\u7a0b\u6c60\u9694\u79bb\uff0c\u5f00\u9500\u4f1a\u66f4\u5c0f\u4e00\u4e9b\uff0c\u4f7f\u7528\u6548\u679c\u540c\u6837\u4f18\u79c0\uff0c\u4e5f\u652f\u6301\u8d85\u65f6\u7b49\u3002<\/p>\n\n\n\nSentinel\u4e5f\u6b63\u662f\u91c7\u7528\u7684\u8fd9\u79cd\u65b9\u6848\u5b9e\u73b0\u9694\u79bb\u7684\u3002<\/p>\n\n\n\n
\u5f53\u4e0b\u6e38\u670d\u52a1\u56e0\u4e3a\u67d0\u79cd\u539f\u56e0\u53d8\u5f97\u4e0d\u53ef\u7528\u6216\u54cd\u5e94\u8fc7\u6162\u65f6\uff0c\u4e0a\u6e38\u670d\u52a1\u4e3a\u4e86\u4fdd\u8bc1\u81ea\u5df1\u6574\u4f53\u670d\u52a1\u7684\u53ef\u7528\u6027\uff0c\u4e0d\u518d\u7ee7\u7eed\u8c03\u7528\u76ee\u6807\u670d\u52a1\u800c\u662f\u5feb\u901f\u8fd4\u56de\u6216\u662f\u6267\u884c\u81ea\u5df1\u7684\u66ff\u4ee3\u65b9\u6848\uff0c\u8fd9\u4fbf\u662f\u670d\u52a1\u964d\u7ea7\u3002<\/p>\n\n\n\n
\u6574\u4e2a\u8fc7\u7a0b\u5206\u4e3a\u4e09\u4e2a\u72b6\u6001\uff1a<\/p>\n\n\n\n
\n- \u5173\u95ed\uff1a\u7194\u65ad\u5668\u4e0d\u5de5\u4f5c\uff0c\u6240\u6709\u8bf7\u6c42\u5168\u90e8\u8be5\u5e72\u561b\u5e72\u561b\u3002<\/li>\n\n\n\n
- \u6253\u5f00\uff1a\u7194\u65ad\u5668\u5de5\u4f5c\uff0c\u6240\u6709\u8bf7\u6c42\u4e00\u5f8b\u964d\u7ea7\u5904\u7406\u3002<\/li>\n\n\n\n
- \u534a\u5f00\uff1a\u5c1d\u8bd5\u8fdb\u884c\u4e00\u4e0b\u4e0b\u6b63\u5e38\u6d41\u7a0b\uff0c\u8981\u662f\u8fd8\u4e0d\u884c\u7ee7\u7eed\u4fdd\u6301\u6253\u5f00\u72b6\u6001\uff0c\u5426\u5219\u5173\u95ed\u3002<\/li>\n<\/ul>\n\n\n\n
\u6211\u4eec\u6765\u770b\u770bSentinel\u4e2d\u5982\u4f55\u8fdb\u884c\u7194\u65ad\u548c\u964d\u7ea7\u64cd\u4f5c\uff0c\u6253\u5f00\u7ba1\u7406\u9875\u9762\uff0c\u6211\u4eec\u53ef\u4ee5\u81ea\u7531\u65b0\u589e\u7194\u65ad\u89c4\u5219\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-15.png?resize=1024%2C310&ssl=1\")
<\/figure>\n\n\n\n\u5176\u4e2d\uff0c\u7194\u65ad\u7b56\u7565\u6709\u4e09\u79cd\u6a21\u5f0f\uff1a<\/p>\n\n\n\n
1.\u6162\u8c03\u7528\u6bd4\u4f8b\uff1a<\/strong><\/p>\n\n\n\n\u5982\u679c\u51fa\u73b0\u90a3\u79cd\u534a\u5929\u90fd\u5904\u7406\u4e0d\u5b8c\u7684\u8c03\u7528\uff0c\u6709\u53ef\u80fd\u5c31\u662f\u670d\u52a1\u51fa\u73b0\u6545\u969c\uff0c\u5bfc\u81f4\u5361\u987f\uff0c\u8fd9\u4e2a\u9009\u9879\u662f\u6309\u7167\u6700\u5927\u54cd\u5e94\u65f6\u95f4\uff08RT\uff09\u8fdb\u884c\u5224\u5b9a\uff0c\u5982\u679c\u4e00\u6b21\u8bf7\u6c42\u7684\u5904\u7406\u65f6\u95f4\u8d85\u8fc7\u4e86\u6307\u5b9a\u7684RT\uff0c\u90a3\u4e48\u5c31\u88ab\u5224\u5b9a\u4e3a\u6162\u8c03\u7528<\/code>\uff0c\u5728\u4e00\u4e2a\u7edf\u8ba1\u65f6\u957f\u5185\uff0c\u5982\u679c\u8bf7\u6c42\u6570\u76ee\u5927\u4e8e\u6700\u5c0f\u8bf7\u6c42\u6570\u76ee\uff0c\u5e76\u4e14\u88ab\u5224\u5b9a\u4e3a\u6162\u8c03\u7528<\/code>\u7684\u8bf7\u6c42\u6bd4\u4f8b\u5df2\u7ecf\u8d85\u8fc7\u9608\u503c\uff0c\u5c06\u89e6\u53d1\u7194\u65ad\u3002\u7ecf\u8fc7\u7194\u65ad\u65f6\u957f\u4e4b\u540e\uff0c\u5c06\u4f1a\u8fdb\u5165\u5230\u534a\u5f00\u72b6\u6001\u8fdb\u884c\u8bd5\u63a2\uff08\u8fd9\u91cc\u548cHystrix\u4e00\u81f4\uff09<\/p>\n\n\n\n\u6211\u4eec\u6a21\u62df\u4e00\u4e0b\u6162\u8c03\u7528\uff1a<\/p>\n\n\n\n
@RequestMapping(\"\/borrow2\/{uid}\")\r\nUserBorrowDetail findUserBorrows2(@PathVariable(\"uid\") int uid) throws InterruptedException {\r\n Thread.sleep(1000);\r\n return null;\r\n}<\/code><\/pre>\n\n\n\n\u521b\u5efa\u7194\u65ad\u89c4\u5219\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-17.png?resize=1024%2C297&ssl=1\")
<\/figure>\n\n\n\n\u53ef\u4ee5\u770b\u5230\uff0c\u8d85\u65f6\u76f4\u63a5\u89e6\u53d1\u4e86\u7194\u65ad\uff0c\u8fdb\u5165\u5230\u963b\u6b62\u9875\u9762\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-18.png?resize=431%2C94&ssl=1\")
<\/figure>\n\n\n\n2.\u5f02\u5e38\u6bd4\u4f8b\uff1a<\/strong><\/p>\n\n\n\n\u8fd9\u4e2a\u4e0e\u6162\u8c03\u7528\u6bd4\u4f8b\u7c7b\u4f3c\uff0c\u4e0d\u8fc7\u8fd9\u91cc\u5224\u65ad\u7684\u662f\u51fa\u73b0\u5f02\u5e38\u7684\u6b21\u6570\uff0c\u4e0e\u4e0a\u9762\u4e00\u6837\uff0c\u6211\u4eec\u4e5f\u6765\u8fdb\u884c\u4e00\u4e9b\u5c0f\u6d4b\u8bd5\uff1a<\/p>\n\n\n\n
@RequestMapping(\"\/borrow2\/{uid}\")\r\nUserBorrowDetail findUserBorrows2(@PathVariable(\"uid\") int uid) {\r\n throw new RuntimeException();\r\n}<\/code><\/pre>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-19.png?resize=1024%2C304&ssl=1\")
<\/figure>\n\n\n\n\u6b64\u65f6\u6211\u4eec\u8bbf\u95ee\u4f1a\u4e0d\u65ad\u62a5\u51fa\u5f02\u5e38\uff0c\u5e76\u8fdb\u884c\u7194\u65ad\u3002<\/p>\n\n\n\n
3.\u5f02\u5e38\u6570<\/strong>\uff1a<\/p>\n\n\n\n\u8fd9\u4e2a\u548c\u4e0a\u9762\u7684\u552f\u4e00\u533a\u522b\u5c31\u662f\uff0c\u53ea\u8981\u8fbe\u5230\u6307\u5b9a\u7684\u5f02\u5e38\u6570\u91cf\uff0c\u5c31\u7194\u65ad<\/p>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-20.png?resize=1024%2C330&ssl=1\")
<\/figure>\n\n\n\n\u90a3\u4e48\uff0c\u5982\u4f55\u81ea\u5b9a\u4e49\u670d\u52a1\u964d\u7ea7\u5462\uff1f<\/p>\n\n\n\n
\u540c\u6837\u7684\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5728@SentinelResource<\/code>\u4e2d\u914d\u7f6eblockHandler<\/code>\u53c2\u6570\uff08\u90a3\u8fd9\u91cc\u8ddf\u524d\u9762\u90a3\u4e2a\u65b9\u6cd5\u9650\u6d41\u7684\u914d\u7f6e\u4e0d\u662f\u4e00\u6bdb\u4e00\u6837\u5417\uff1f\u6ca1\u9519\uff0c\u56e0\u4e3a\u5982\u679c\u6dfb\u52a0\u4e86@SentinelResource<\/code>\u6ce8\u89e3\uff0c\u90a3\u4e48\u8fd9\u91cc\u4f1a\u8fdb\u884c\u65b9\u6cd5\u7ea7\u522b\u7ec6\u7c92\u5ea6\u7684\u9650\u5236\uff0c\u548c\u4e4b\u524d\u65b9\u6cd5\u7ea7\u522b\u9650\u6d41\u4e00\u6837\uff0c\u4f1a\u5728\u964d\u7ea7\u4e4b\u540e\u76f4\u63a5\u629b\u51fa\u5f02\u5e38\uff0c\u5982\u679c\u4e0d\u6dfb\u52a0\u5219\u8fd4\u56de\u9ed8\u8ba4\u7684\u9650\u6d41\u9875\u9762\uff0cblockHandler<\/code>\u7684\u76ee\u7684\u5c31\u662f\u5904\u7406\u8fd9\u79cdSentinel\u673a\u5236\u4e0a\u7684\u5f02\u5e38\uff0c\u6240\u4ee5\u8fd9\u91cc\u5176\u5b9e\u548c\u4e4b\u524d\u7684\u9650\u6d41\u914d\u7f6e\u662f\u4e00\u4e2a\u9053\u7406\uff0c\u56e0\u6b64\u4e0b\u9762\u7194\u65ad\u914d\u7f6e\u4e5f\u5e94\u8be5\u5bf9value<\/code>\u81ea\u5b9a\u4e49\u540d\u79f0\u7684\u8d44\u6e90\u8fdb\u884c\u914d\u7f6e\uff0c\u624d\u80fd\u4f5c\u7528\u5230\u6b64\u65b9\u6cd5\u4e0a\uff09\uff1a<\/p>\n\n\n\n@RequestMapping(\"\/borrow2\/{uid}\")\r\n@SentinelResource(value = \"findUserBorrows2\", blockHandler = \"test\")\r\nUserBorrowDetail findUserBorrows2(@PathVariable(\"uid\") int uid) {\r\n throw new RuntimeException();\r\n}\r\n\r\nUserBorrowDetail test(int uid, BlockException e){\r\n return new UserBorrowDetail(new User(), Collections.emptyList());\r\n}<\/code><\/pre>\n\n\n\n\u63a5\u7740\u6211\u4eec\u5bf9\u8fdb\u884c\u7194\u65ad\u914d\u7f6e\uff0c\u6ce8\u610f\u662f\u5bf9\u6211\u4eec\u6dfb\u52a0\u7684@SentinelResource<\/code>\u4e2d\u6307\u5b9a\u540d\u79f0\u7684findUserBorrows2<\/code>\u8fdb\u884c\u914d\u7f6e\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-21.png?resize=1024%2C252&ssl=1\")
<\/figure>\n\n\n\n\u4e4b\u540e\u6211\u4eec\u5728\u7194\u65ad\u4e4b\u540e\uff0c\u5c31\u80fd\u770b\u5230\u964d\u7ea7\u7684\u6548\u679c\u4e86\u3002<\/p>\n\n\n\n
\u6700\u540e\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5982\u4f55\u8ba9Feign\u7684\u4e5f\u652f\u6301Sentinel\uff0c\u524d\u9762\u6211\u4eec\u4f7f\u7528Hystrix\u7684\u65f6\u5019\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u5bf9Feign\u7684\u6bcf\u4e2a\u63a5\u53e3\u8c03\u7528\u5355\u72ec\u8fdb\u884c\u670d\u52a1\u964d\u7ea7\uff0c\u800c\u4f7f\u7528Sentinel\uff0c\u4e5f\u662f\u53ef\u4ee5\u7684\uff0c\u9996\u5148\u6211\u4eec\u9700\u8981\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u5f00\u542f\u652f\u6301\uff1a<\/p>\n\n\n\n
feign:\r\n sentinel:\r\n enabled: true<\/code><\/pre>\n\n\n\n\u4e4b\u540e\u7684\u6b65\u9aa4\u5176\u5b9e\u548c\u4e4b\u524d\u662f\u4e00\u6a21\u4e00\u6837\u7684\uff0c\u9996\u5148\u521b\u5efa\u5b9e\u73b0\u7c7b\uff1a<\/p>\n\n\n\n
@Component\r\npublic class UserClientFallback implements UserClient{\r\n @Override\r\n public User getUserById(int uid) {\r\n User user = new User();\r\n user.setName(\"\u6211\u662f\u66ff\u4ee3\u65b9\u6848\");\r\n return user;\r\n }\r\n}<\/code><\/pre>\n\n\n\n\u5728\u539f\u670d\u52a1\u7684@FeignClient<\/code>\u6ce8\u89e3\u4e0b\uff0c\u6dfb\u52a0fallback<\/code>\u5c5e\u6027:<\/p>\n\n\n\n@FeignClient(value = \"userservice\",fallback = UserClientFallback.class)\r\npublic interface UserClient {\r\n @RequestMapping(\"\/user\/{uid}\")\r\n User getUserById(@PathVariable(\"uid\") int uid);\r\n}<\/code><\/pre>\n\n\n\n\u8fd9\u6837\u5f53\u6211\u4eec\u5c06User\u670d\u52a1\u5173\u95ed\uff0c\u5c31\u80fd\u4f7f\u7528\u964d\u7ea7\u65b9\u6848\u4e86\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-22.png?resize=829%2C184&ssl=1\")
<\/figure>\n\n\n\n\u90a3\u4e48\u4f20\u7edf\u7684RestTemplate\u5462\uff1f\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528@SentinelRestTemplate<\/code>\u6ce8\u89e3\u5b9e\u73b0\uff1a<\/p>\n\n\n\n@Bean\r\n @LoadBalanced\r\n @SentinelRestTemplate(blockHandler = \"handleException\", blockHandlerClass = ExceptionUtil.class,\r\n fallback = \"fallback\", fallbackClass = ExceptionUtil.class) \/\/\u8fd9\u91cc\u540c\u6837\u53ef\u4ee5\u8bbe\u5b9afallback\u7b49\u53c2\u6570\r\n public RestTemplate restTemplate() {\r\n return new RestTemplate();\r\n }<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5728\u5fae\u670d\u52a1\u4e2d\u5b58\u5728\u96ea\u5d29\u73b0\u8c61\uff0c\u4e5f\u5c31\u662f\u8bf4\u5982\u679c\u4e00\u4e2a\u5fae\u670d\u52a1\u51fa\u73b0\u95ee\u9898\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6574\u4e2a\u94fe\u8def\u4e0a\u7684\u670d\u52a1\u90fd\u76f4\u63a5\u4e0d\u53ef\u7528\uff0c\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-1508","post","type-post","status-publish","format-standard","hentry","category-6"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/1508"}],"collection":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/comments?post=1508"}],"version-history":[{"count":4,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/1508\/revisions"}],"predecessor-version":[{"id":1535,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/1508\/revisions\/1535"}],"wp:attachment":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/media?parent=1508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/categories?post=1508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/tags?post=1508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/i1.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image.png?resize=1024%2C422&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-1.png?resize=1025%2C170&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-2.png?resize=1024%2C308&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-3.png?resize=1024%2C109&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-4.png?resize=1024%2C382&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-5.png?resize=676%2C510&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i0.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-6.png?resize=643%2C166&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i1.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-7.png?resize=1024%2C252&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i1.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-9.png?resize=764%2C577&ssl=1\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2024\/01\/image-10.png?resize=1024%2C361&ssl=1\")
<\/figure>\n\n\n\n