\u4e2d\u6587<\/p>\n
https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E4%BB%8B%E7%BB%8D<\/a><\/p>\n \u968f\u7740\u5fae\u670d\u52a1\u7684\u6d41\u884c\uff0c\u670d\u52a1\u548c\u670d\u52a1\u4e4b\u95f4\u7684\u7a33\u5b9a\u6027\u53d8\u5f97\u8d8a\u6765\u8d8a\u91cd\u8981\u3002Sentinel \u4ee5\u6d41\u91cf\u4e3a\u5207\u5165\u70b9\uff0c\u4ece\u6d41\u91cf\u63a7\u5236\u3001\u7194\u65ad\u964d\u7ea7\u3001\u7cfb\u7edf\u8d1f\u8f7d\u4fdd\u62a4\u7b49\u591a\u4e2a\u7ef4\u5ea6\u4fdd\u62a4\u670d\u52a1\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n \u4e00\u53e5\u8bdd\u89e3\u91ca\uff0c\u4e4b\u524d\u6211\u4eec\u8bb2\u89e3\u8fc7\u7684Hystrix<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/releases<\/a><\/p>\n https:\/\/spring-cloud-alibaba-group.github.io\/github-pages\/greenwich\/spring-cloud-alibaba.html#_spring_cloud_alibaba_sentinel<\/a><\/p>\n \u670d\u52a1\u4f7f\u7528\u4e2d\u7684\u5404\u79cd\u95ee\u9898\uff1a<\/p>\n \u670d\u52a1\u96ea\u5d29<\/p>\n \u670d\u52a1\u964d\u7ea7<\/p>\n \u670d\u52a1\u7194\u65ad<\/p>\n \u670d\u52a1\u9650\u6d41<\/p>\n \u540e\u53f0 <\/p>\n \u524d\u53f08080<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/releases<\/a><\/p>\n \u4e0b\u8f7d\u5230\u672c\u5730sentinel-dashboard-1.7.0.jar<\/p>\n \u524d\u63d0<\/p>\n java8\u73af\u5883OK<\/p>\n 8080\u7aef\u53e3\u4e0d\u80fd\u88ab\u5360\u7528<\/p>\n \u547d\u4ee4<\/p>\n java -jar sentinel-dashboard-1.7.0.jar<\/p>\n \u6211\u5e94\u8be5\u73af\u5883\u53d8\u91cf\u662fjdk17<\/p>\n \u6240\u4ee5\u5230jdk8\u8def\u5f84\u4e0b\u6267\u884c<\/p>\n http:\/\/localhost:8080<\/a><\/p>\n \u767b\u5f55\u8d26\u53f7\u5bc6\u7801\u5747\u4e3asentinel<\/p>\n \u542f\u52a8Nacos8848\u6210\u529f<\/p>\n http:\/\/localhost:8848\/nacos\/#\/login<\/a><\/p>\n cloudalibaba-sentinel-service8401<\/p>\n POM<\/p>\n YML<\/p>\n \u4e3b\u542f\u52a8<\/p>\n \u4e1a\u52a1\u7c7bFlowLimitController<\/p>\n \u542f\u52a8Sentinel8080\uff1ajava -jar sentinel-dashboard-1.7.0.jar<\/p>\n \u542f\u52a8\u5fae\u670d\u52a18401<\/p>\n \u67e5\u770b\u63a7\u5236\u53f0\uff0c\u8fd8\u662f\u7a7a\u7a7a\u5982\u4e5f<\/p>\n \u56e0\u4e3aSentinel\u91c7\u7528\u7684\u662f\u61d2\u52a0\u8f7d\uff0c\u9700\u8981\u6267\u884c\u4e00\u4e0b<\/p>\n http:\/\/localhost:8401\/testA<\/a><\/p>\n http:\/\/localhost:8401\/testB<\/a><\/p>\n \u6548\u679c\uff1a<\/p>\n \u7ed3\u8bba<\/p>\n sentinel8080\u6b63\u5728\u76d1\u63a7\u5fae\u670d\u52a18401<\/p>\n \u76f4\u63a5->\u5feb\u901f\u5931\u8d25\uff1a\u7cfb\u7edf\u9ed8\u8ba4<\/p>\n \u914d\u7f6e\u53ca\u8bf4\u660e<\/p>\n \u8868\u793a1\u79d2\u949f\u5185\u67e5\u8be21\u6b21\u5c31\u662fOK\uff0c\u82e5\u8d85\u8fc7\u6b21\u65701\uff0c\u5c31\u76f4\u63a5-\u5feb\u901f\u5931\u8d25\uff0c\u62a5\u9ed8\u8ba4\u9519\u8bef<\/p>\n \u6d4b\u8bd5<\/p>\n \u5feb\u901f\u70b9\u51fb\u8bbf\u95eehttp:\/\/localhost:8401\/testA<\/p>\n \u7ed3\u679c<\/p>\n Blocked by Sentinel (flow limiting)<\/p>\n \u601d\u8003???<\/p>\n \u76f4\u63a5\u8c03\u7528\u9ed8\u8ba4\u62a5\u9519\u4fe1\u606f\uff0c\u6280\u672f\u65b9\u9762OK \u7c7b\u4f3c\u6709\u4e2afallback\u7684\u515c\u5e95\u65b9\u6cd5\uff1f<\/p>\n \u5f53\u5173\u8054\u7684\u8d44\u6e90\u8fbe\u5230\u9608\u503c\u65f6\uff0c\u5c31\u9650\u6d41\u81ea\u5df1<\/p>\n \u5f53\u4e0eA\u5173\u8054\u7684\u8d44\u6e90B\u8fbe\u5230\u9600\u503c\u540e\uff0c\u5c31\u9650\u6d41A\u81ea\u5df1<\/p>\n B\u60f9\u4e8b\uff0cA\u6302\u4e86<\/p>\n \u914d\u7f6eA<\/p>\n \u8bbe\u7f6e\u6548\u679c \u5148\u4fdd\u5b58\u8be5http\u8bf7\u6c42<\/p>\n \u5148\u8bbf\u95eetestA testB\u6210\u529f<\/p>\n \u6267\u884cpostman\u6a21\u62dftestB\u8bf7\u6c42<\/p>\n \u70b9\u51fb\u8bbf\u95eehttp:\/\/localhost:8401\/testA<\/p>\n \u518d\u8bf7\u6c42testA\uff0c\u53d1\u73b0<\/p>\n \u5927\u6279\u91cf\u7ebf\u7a0b\u9ad8\u5e76\u53d1\u8bbf\u95eeB\uff0c\u5bfc\u81f4A\u5931\u6548\u4e86<\/p>\n \u591a\u4e2a\u8bf7\u6c42\u8c03\u7528\u4e86\u540c\u4e00\u4e2a\u5fae\u670d\u52a1<\/p>\n \u94fe\u8def\u6a21\u5f0f\uff1a\u53ea\u9488\u5bf9\u4ece\u6307\u5b9a\u94fe\u8def\u8bbf\u95ee\u5230\u672c\u8d44\u6e90\u7684\u8bf7\u6c42\u505a\u7edf\u8ba1\uff0c\u5224\u65ad\u662f\u5426\u8d85\u8fc7\u9608\u503c\u3002<\/p>\n \u76f4\u63a5\u5931\u8d25\uff0c\u629b\u51fa\u5f02\u5e38:Blocked by Sentinel (flow limiting)<\/p>\n \u6e90\u7801<\/p>\n com.alibaba.csp.sentinel.slots.block.flow.controller.DefaultController<\/p>\n \u8bf4\u660e<\/p>\n \u516c\u5f0f\uff1a\u9608\u503c\u9664\u4ee5coldFactor(\u9ed8\u8ba4\u503c\u4e3a3),\u7ecf\u8fc7\u9884\u70ed\u65f6\u957f\u540e\u624d\u4f1a\u8fbe\u5230\u9608\u503c<\/p>\n \u5b98\u7f51<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E6%B5%81%E9%87%8F%E6%8E%A7%E5%88%B6<\/a><\/p>\n \u9ed8\u8ba4coldFactor\u4e3a3\uff0c\u5373\u8bf7\u6c42 QPS \u4ece threshold \/ 3 \u5f00\u59cb\uff0c\u7ecf\u9884\u70ed\u65f6\u957f\u9010\u6e10\u5347\u81f3\u8bbe\u5b9a\u7684 QPS \u9608\u503c\u3002<\/p>\n \u9650\u6d41 \u51b7\u542f\u52a8:https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E9%99%90%E6%B5%81---%E5%86%B7%E5%90%AF%E5%8A%A8<\/a><\/p>\n \u6e90\u7801<\/p>\n com.alibaba.csp.sentinel.slots.block.flow.controller.WarmUpController<\/p>\n WarmUp\u914d\u7f6e<\/p>\n \u9ed8\u8ba4 coldFactor \u4e3a 3\uff0c\u5373\u8bf7\u6c42QPS\u4ece(threshold \/ 3) \u5f00\u59cb\uff0c\u7ecf\u591a\u5c11\u9884\u70ed\u65f6\u957f\u624d\u9010\u6e10\u5347\u81f3\u8bbe\u5b9a\u7684 QPS \u9608\u503c\u3002 \u591a\u6b21\u70b9\u51fbhttp:\/\/localhost:8401\/testB<\/p>\n \u521a\u5f00\u59cb\u4e0d\u884c\uff0c\u540e\u7eed\u6162\u6162OK<\/p>\n \u5e94\u7528\u573a\u666f<\/p>\n \u5982\uff1a\u79d2\u6740\u7cfb\u7edf\u5728\u5f00\u542f\u7684\u77ac\u95f4\uff0c\u4f1a\u6709\u5f88\u591a\u6d41\u91cf\u4e0a\u6765\uff0c\u5f88\u6709\u53ef\u80fd\u628a\u7cfb\u7edf\u6253\u6b7b\uff0c\u9884\u70ed\u65b9\u5f0f\u5c31\u662f\u628a\u4e3a\u4e86\u4fdd\u62a4\u7cfb\u7edf\uff0c\u53ef\u6162\u6162\u7684\u628a\u6d41\u91cf\u653e\u8fdb\u6765\uff0c\u6162\u6162\u7684\u628a\u9600\u503c\u589e\u957f\u5230\u8bbe\u7f6e\u7684\u9600\u503c\u3002<\/p>\n \u5300\u901f\u6392\u961f\uff0c\u8ba9\u8bf7\u6c42\u4ee5\u5747\u5300\u7684\u901f\u5ea6\u901a\u8fc7\uff0c\u9600\u503c\u7c7b\u578b\u5fc5\u987b\u8bbe\u6210QPS\uff0c\u5426\u5219\u65e0\u6548\u3002 \u5300\u901f\u6392\u961f\uff0c\u9608\u503c\u5fc5\u987b\u8bbe\u7f6e\u4e3aQPS<\/p>\n \u5b98\u7f51<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E6%B5%81%E9%87%8F%E6%8E%A7%E5%88%B6<\/a><\/p>\n \u6e90\u7801<\/p>\n com.alibaba.csp.sentinel.slots.block.flow.controller.RateLimiterController<\/p>\n \u6d4b\u8bd5<\/p>\n postman\u591a\u7ebf\u7a0b\u6d4b\u8bd5,\u7ed3\u679c\u4e3a\u5300\u901f\u6bcf\u79d2\u4e00\u6b21\u8bbf\u95ee<\/p>\n \u5b98\u7f51<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E7%86%94%E6%96%AD%E9%99%8D%E7%BA%A7<\/a><\/p>\n \u57fa\u672c\u4ecb\u7ecd<\/p>\n RT\uff08\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\uff0c\u79d2\u7ea7\uff09 \u5f02\u5e38\u6bd4\u5217\uff08\u79d2\u7ea7\uff09 \u5f02\u5e38\u6570\uff08\u5206\u949f\u7ea7\uff09 \u8fdb\u4e00\u6b65\u8bf4\u660e<\/p>\n Sentinel \u7194\u65ad\u964d\u7ea7\u4f1a\u5728\u8c03\u7528\u94fe\u8def\u4e2d\u67d0\u4e2a\u8d44\u6e90\u51fa\u73b0\u4e0d\u7a33\u5b9a\u72b6\u6001\u65f6\uff08\u4f8b\u5982\u8c03\u7528\u8d85\u65f6\u6216\u5f02\u5e38\u6bd4\u4f8b\u5347\u9ad8\uff09\uff0c\u5bf9\u8fd9\u4e2a\u8d44\u6e90\u7684\u8c03\u7528\u8fdb\u884c\u9650\u5236\uff0c \u5f53\u8d44\u6e90\u88ab\u964d\u7ea7\u540e\uff0c\u5728\u63a5\u4e0b\u6765\u7684\u964d\u7ea7\u65f6\u95f4\u7a97\u53e3\u4e4b\u5185\uff0c\u5bf9\u8be5\u8d44\u6e90\u7684\u8c03\u7528\u90fd\u81ea\u52a8\u7194\u65ad\uff08\u9ed8\u8ba4\u884c\u4e3a\u662f\u629b\u51fa DegradeException\uff09\u3002<\/p>\n Sentinel\u7684\u65ad\u8def\u5668\u662f\u6ca1\u6709\u534a\u5f00\u72b6\u6001\u7684<\/p>\n \u534a\u5f00\u7684\u72b6\u6001\u7cfb\u7edf\u81ea\u52a8\u53bb\u68c0\u6d4b\u662f\u5426\u8bf7\u6c42\u6709\u5f02\u5e38\uff0c RT<\/p>\n \u662f\u4ec0\u4e48<\/p>\n \u6d4b\u8bd5<\/p>\n \u4ee3\u7801<\/p>\n \u914d\u7f6e<\/p>\n jmeter\u538b\u6d4b<\/p>\n \u6c38\u8fdc\u4e00\u79d2\u949f\u6253\u8fdb\u676510\u4e2a\u7ebf\u7a0b\uff08\u5927\u4e8e5\u4e2a\u4e86\uff09\u8c03\u7528testD\uff0c\u6211\u4eec\u5e0c\u671b200\u6beb\u79d2\u5904\u7406\u5b8c\u672c\u6b21\u4efb\u52a1\uff0c \u540e\u7eed\u6211\u505c\u6b62jmeter\uff0c\u6ca1\u6709\u8fd9\u4e48\u5927\u7684\u8bbf\u95ee\u91cf\u4e86\uff0c\u65ad\u8def\u5668\u5173\u95ed(\u4fdd\u9669\u4e1d\u6062\u590d)\uff0c\u5fae\u670d\u52a1\u6062\u590dOK<\/p>\n \u5f02\u5e38\u6bd4\u4f8b<\/p>\n \u662f\u4ec0\u4e48<\/p>\n \u6d4b\u8bd5<\/p>\n \u4ee3\u7801<\/p>\n \u914d\u7f6e<\/p>\n jmeter<\/p>\n 20\u7ebf\u7a0b\u6570 \u6c38\u8fdc<\/p>\n \u7ed3\u8bba<\/p>\n \u6309\u7167\u4e0a\u8ff0\u914d\u7f6e\uff0c \u5f00\u542fjmeter\u540e\uff0c\u76f4\u63a5\u9ad8\u5e76\u53d1\u53d1\u9001\u8bf7\u6c42\uff0c\u591a\u6b21\u8c03\u7528\u8fbe\u5230\u6211\u4eec\u7684\u914d\u7f6e\u6761\u4ef6\u4e86\u3002 \u5f02\u5e38\u6570<\/p>\n \u662f\u4ec0\u4e48<\/p>\n \u5f02\u5e38\u6570\u662f\u6309\u7167\u5206\u949f\u7edf\u8ba1\u7684<\/strong><\/p>\n \u6d4b\u8bd5<\/p>\n \u4e1a\u52a1\u4ee3\u7801<\/p>\n jmeter<\/p>\n http:\/\/localhost:8401\/testD\uff0c\u7b2c\u4e00\u6b21\u8bbf\u95ee\u7edd\u5bf9\u62a5\u9519\uff0c\u56e0\u4e3a\u9664\u6570\u4e0d\u80fd\u4e3a\u96f6<\/a>\uff0c \u57fa\u672c\u4ecb\u7ecd<\/p>\n \u4f55\u4e3a\u70ed\u70b9 \u5b98\u7f51<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E7%83%AD%E7%82%B9%E5%8F%82%E6%95%B0%E9%99%90%E6%B5%81<\/a><\/p>\n \u627f\u4e0a\u542f\u4e0b\u590d\u4e60start<\/p>\n @SentinelResource<\/p>\n \u515c\u5e95\u65b9\u6cd5 \u4e4b\u524d\u7684case\uff0c\u9650\u6d41\u51fa\u95ee\u9898\u540e\uff0c\u90fd\u662f\u7528sentinel\u7cfb\u7edf\u9ed8\u8ba4\u7684\u63d0\u793a\uff1aBlocked by Sentinel (flow limiting)<\/p>\n \u6211\u4eec\u80fd\u4e0d\u80fd\u81ea\u5b9a?\u7c7b\u4f3chystrix\uff0c\u67d0\u4e2a\u65b9\u6cd5\u51fa\u95ee\u9898\u4e86\uff0c\u5c31\u627e\u5bf9\u5e94\u7684\u515c\u5e95\u964d\u7ea7\u65b9\u6cd5\uff1f<\/p>\n \u7ed3\u8bba \u4ee3\u7801<\/p>\n \u9650\u6d41\u6a21\u5f0f\u53ea\u652f\u6301QPS\u6a21\u5f0f\uff0c\u56fa\u5b9a\u5199\u6b7b\u4e86\u3002\uff08\u8fd9\u624d\u53eb\u70ed\u70b9\uff09 @SentinelResource(value = "testHotKey")<\/p>\n \u5f02\u5e38\u6253\u5230\u4e86\u524d\u53f0\u7528\u6237\u754c\u9762\u770b\u5230\uff0c\u4e0d\u53cb\u597d<\/p>\n @SentinelResource(value = "testHotKey",blockHandler = "dealHandler_testHotKey")<\/p>\n \u65b9\u6cd5testHotKey\u91cc\u9762\u7b2c\u4e00\u4e2a\u53c2\u6570\u53ea\u8981QPS\u8d85\u8fc7\u6bcf\u79d21\u6b21\uff0c\u9a6c\u4e0a\u964d\u7ea7\u5904\u7406<\/p>\n \u7528\u4e86\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u7684<\/p>\n \u6d4b\u8bd5<\/p>\n error http:\/\/localhost:8401\/testHotKey?p1=abc<\/a><\/p>\n error http:\/\/localhost:8401\/testHotKey?p1=abc&p2=33<\/a><\/p>\n right http:\/\/localhost:8401\/testHotKey?p2=abc<\/a><\/p>\n \u4e0a\u8ff0\u6848\u4f8b\u6f14\u793a\u4e86\u7b2c\u4e00\u4e2a\u53c2\u6570p1\uff0c\u5f53QPS\u8d85\u8fc71\u79d21\u6b21\u70b9\u51fb\u540e\u9a6c\u4e0a\u88ab\u9650\u6d41<\/p>\n \u7279\u4f8b\u60c5\u51b5<\/p>\n \u666e\u901a:\u8d85\u8fc71\u79d2\u949f\u4e00\u4e2a\u540e\uff0c\u8fbe\u5230\u9608\u503c1\u540e\u9a6c\u4e0a\u88ab\u9650\u6d41<\/p>\n \u6211\u4eec\u671f\u671bp1\u53c2\u6570\u5f53\u5b83\u662f\u67d0\u4e2a\u7279\u6b8a\u503c\u65f6\uff0c\u5b83\u7684\u9650\u6d41\u503c\u548c\u5e73\u65f6\u4e0d\u4e00\u6837<\/p>\n \u7279\u4f8b:\u5047\u5982\u5f53p1\u7684\u503c\u7b49\u4e8e5\u65f6\uff0c\u5b83\u7684\u9608\u503c\u53ef\u4ee5\u8fbe\u5230200<\/p>\n \u6d4b\u8bd5<\/p>\n right http:\/\/localhost:8401\/testHotKey?p1=5<\/a><\/p>\n error http:\/\/localhost:8401\/testHotKey?p1=3<\/a><\/p>\n \u5f53p1\u7b49\u4e8e5\u7684\u65f6\u5019\uff0c\u9608\u503c\u53d8\u4e3a5<\/p>\n \u5f53p1\u4e0d\u7b49\u4e8e5\u7684\u65f6\u5019\uff0c\u9608\u503c\u5c31\u662f\u5e73\u5e38\u76841<\/p>\n \u70ed\u70b9\u53c2\u6570\u7684\u6ce8\u610f\u70b9\uff0c\u53c2\u6570\u5fc5\u987b\u662f\u57fa\u672c\u7c7b\u578b\u6216\u8005String<\/p>\n @SentinelResource RuntimeException \u603b\u7ed3 \u662f\u4ec0\u4e48<\/p>\n https:\/\/github.com\/alibaba\/Sentinel\/wiki\/%E7%B3%BB%E7%BB%9F%E8%87%AA%E9%80%82%E5%BA%94%E9%99%90%E6%B5%81<\/a><\/p>\n \u5404\u9879\u914d\u7f6e\u53c2\u6570\u8bf4\u660e<\/p>\n \u914d\u7f6e\u5168\u5c40QPS<\/p>\n \u76f8\u5bf9\u4e8e\u4e0a\u9762\u7684\u7ec6\u5bc6\u5ea6\u63a7\u5236\uff0c\u8fd9\u662f\u7c97\u5bc6\u5ea6<\/p>\n \u542f\u52a8Nacos\u6210\u529f<\/p>\n \u542f\u52a8Sentinel\u6210\u529f<\/p>\n Module<\/p>\n \u4fee\u6539cloudalibaba-sentinel-service8401<\/p>\n POM<\/p>\n \u4e1a\u52a1\u7c7bRateLimitController<\/p>\n \u914d\u7f6e\u6d41\u63a7\u89c4\u5219<\/p>\n \u8868\u793a1\u79d2\u949f\u5185\u67e5\u8be2\u6b21\u6570\u5927\u4e8e1\uff0c\u5c31\u8dd1\u5230\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u5904\u6d41\uff0c\u9650\u6d41<\/p>\n 1\u79d2\u949f\u70b9\u51fb1\u4e0b\uff0cOK<\/p>\n \u8d85\u8fc7\u4e0a\u8ff0\uff0c\u75af\u72c2\u70b9\u51fb\uff0c\u8fd4\u56de\u4e86\u81ea\u5df1\u5b9a\u4e49\u7684\u9650\u6d41\u5904\u7406\u4fe1\u606f\uff0c\u9650\u6d41\u53d1\u751f<\/p>\n \u6b64\u65f6\u5173\u95ed\u95ee\u670d\u52a18401\u770b\u770b<\/p>\n Sentinel\u63a7\u5236\u53f0\uff0c\u6d41\u63a7\u89c4\u5219\u6d88\u5931\u4e86\uff1f\uff1f\uff1f\uff1f\uff1f<\/p>\n \u4e34\u65f6\/\u6301\u4e45\uff1f<\/p>\n \u901a\u8fc7\u8bbf\u95ee\u7684URL\u6765\u9650\u6d41\uff0c\u4f1a\u8fd4\u56deSentinel\u81ea\u5e26\u9ed8\u8ba4\u7684\u9650\u6d41\u5904\u7406\u4fe1\u606f<\/p>\n \u4e1a\u52a1\u7c7bRateLimitController<\/p>\n Sentinel\u63a7\u5236\u53f0\u914d\u7f6e<\/p>\n \u6d4b\u8bd5<\/p>\n \u75af\u72c2\u70b9\u51fbhttp:\/\/localhost:8401\/rateLimit\/byUrl<\/p>\n \u7ed3\u679c<\/p>\n 1 \u7cfb\u7edf\u9ed8\u8ba4\u7684\uff0c\u6ca1\u6709\u4f53\u73b0\u6211\u4eec\u81ea\u5df1\u7684\u4e1a\u52a1\u8981\u6c42\u3002<\/p>\n 2 \u4f9d\u7167\u73b0\u6709\u6761\u4ef6\uff0c\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u5904\u7406\u65b9\u6cd5\u53c8\u548c\u4e1a\u52a1\u4ee3\u7801\u8026\u5408\u5728\u4e00\u5757\uff0c\u4e0d\u76f4\u89c2\u3002<\/p>\n 3 \u6bcf\u4e2a\u4e1a\u52a1\u65b9\u6cd5\u90fd\u6dfb\u52a0\u4e00\u4e2a\u515c\u5e95\u7684\uff0c\u90a3\u4ee3\u7801\u81a8\u80c0\u52a0\u5267\u3002<\/p>\n 4 \u5168\u5c40\u7edf\u4e00\u7684\u5904\u7406\u65b9\u6cd5\u6ca1\u6709\u4f53\u73b0\u3002<\/p>\n \u521b\u5efaCustomerBlockHandler\u7c7b\u7528\u4e8e\u81ea\u5b9a\u4e49\u9650\u6d41\u5904\u7406\u903b\u8f91<\/p>\n \u81ea\u5b9a\u4e49\u9650\u6d41\u5904\u7406\u7c7b<\/p>\n RateLimitController<\/p>\n \u542f\u52a8\u5fae\u670d\u52a1\u540e\u5148\u8c03\u7528\u4e00\u6b21<\/p>\n http:\/\/localhost:8401\/rateLimit\/customerBlockHandler<\/a><\/p>\n Sentinel\u63a7\u5236\u53f0\u914d\u7f6e<\/p>\n <\/p>\n \u591a\u6b21\u5237\u65b0<\/p>\n \u6d4b\u8bd5\u540e\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u51fa\u6765\u4e86<\/p>\n \u8fdb\u4e00\u6b65\u8bf4\u660e<\/p>\n \u53ef\u4ee5\u4ee3\u7801\u5b9e\u73b0\u914d\u7f6e\u6d41\u63a7\u89c4\u5219\uff0c\u4e0d\u63a8\u8350<\/p>\n \u6240\u6709\u7684\u4ee3\u7801\u90fd\u8981\u7528try-catch-finally\u65b9\u5f0f\u8fdb\u884c\u5904\u7406\uff0co(\u2565\ufe4f\u2565)o<\/p>\n Sentinel\u4e3b\u8981\u6709\u4e09\u4e2a\u6838\u5fc3Api<\/p>\n SphU\u5b9a\u4e49\u8d44\u6e90<\/p>\n Tracer\u5b9a\u4e49\u7edf\u8ba1<\/p>\n ContextUtil\u5b9a\u4e49\u4e86\u4e0a\u4e0b\u6587<\/p>\n sentinel\u6574\u5408ribbon+openFeign+fallback<\/p>\n \u542f\u52a8nacos\u548csentinel<\/p>\n \u65b0\u5efacloudalibaba-provider-payment9003\/9004\u4e24\u4e2a\u4e00\u6837\u7684\u505a\u6cd5<\/p>\n POM<\/p>\n YML\u8bb0\u5f97\u4fee\u6539\u4e0d\u540c\u7684\u7aef\u53e3\u53f7<\/p>\n \u4e3b\u542f\u52a8<\/p>\n \u4e1a\u52a1\u7c7b<\/p>\n \u6d4b\u8bd5\u5730\u5740<\/p>\n http:\/\/localhost:9003\/paymentSQL\/1<\/a><\/p>\n http:\/\/localhost:9004\/paymentSQL\/1<\/a><\/p>\n \u90fd\u80fd\u6b63\u5e38\u8fd4\u56de<\/p>\n \u65b0\u5efacloudalibaba-consumer-nacos-order84<\/p>\n POM<\/p>\n YML<\/p>\n \u4e3b\u542f\u52a8<\/p>\n \u4e1a\u52a1\u7c7b<\/p>\n ApplicationContextConfig<\/p>\n \u4fee\u6539\u540e\u8bf7\u91cd\u542f\u5fae\u670d\u52a1<\/p>\n \u70ed\u90e8\u7f72\u5bf9java\u4ee3\u7801\u7ea7\u751f\u6548\u53ca\u65f6<\/p>\n \u5bf9@SentinelResource\u6ce8\u89e3\u5185\u5c5e\u6027\uff0c\u6709\u65f6\u6548\u679c\u4e0d\u597d<\/p>\n \u76ee\u7684<\/p>\n fallback\u7ba1\u8fd0\u884c\u5f02\u5e38<\/p>\n blockHandler\u7ba1\u914d\u7f6e\u8fdd\u89c4<\/p>\n \u6ca1\u6709\u4efb\u4f55\u914d\u7f6e<\/p>\n \u6d4b\u8bd5\u5730\u5740<\/p>\n http:\/\/localhost:84\/consumer\/fallback\/1<\/a> \u6b63\u5e38<\/p>\n http:\/\/localhost:84\/consumer\/fallback\/4<\/a> \u5f02\u5e38<\/p>\n \u7ed9\u5ba2\u6237error\u9875\u9762\uff0c\u4e0d\u53cb\u597d<\/p>\n \u53ea\u914d\u7f6efallback<\/p>\n \u7ed3\u679c<\/p>\n http:\/\/localhost:84\/consumer\/fallback\/1<\/a><\/p>\n http:\/\/localhost:84\/consumer\/fallback\/4<\/a><\/p>\n \u53ea\u914d\u7f6eblockHandler<\/p>\n \u672c\u4f8bsentinel\u9700\u914d\u7f6e<\/p>\n \u7ed3\u679c<\/p>\n http:\/\/localhost:84\/consumer\/fallback\/1<\/a><\/p>\n http:\/\/localhost:84\/consumer\/fallback\/4<\/a> \u5f00\u59cb\u662f\u5f02\u5e38\u9875\u9762\uff0c\u591a\u5237\u65b0\u51e0\u6b21<\/p>\n fallback\u548cblockHandler\u90fd\u914d\u7f6e<\/p>\n \u5ffd\u7565\u5c5e\u6027.......<\/p>\n \u5ffd\u7565\u8be5IllegalArgumentException\u5f02\u5e38\u540e\uff0c\u6ca1\u6709\u4e86\u53cb\u597d\u63d0\u793a\u4fe1\u606f\uff0c\u76f4\u63a5500\u62a5\u9519<\/p>\n \u603b\u7ed3<\/p>\n fallback\u7ba1java\u5f02\u5e38\uff0cblockHandler\u7ba1\u914d\u7f6e\u5f02\u5e38<\/p>\n \u4fee\u653984\u6a21\u5757<\/p>\n 84\u6d88\u8d39\u8005\u8c03\u7528\u63d0\u4f9b\u80059003<\/p>\n Feign\u7ec4\u4ef6\u4e00\u822c\u662f\u6d88\u8d39\u4fa7<\/p>\n POM<\/p>\n YML<\/p>\n \u6fc0\u6d3bSentinel\u5bf9Feign\u7684\u652f\u6301<\/p>\n \u4e1a\u52a1\u7c7b<\/p>\n \u5e26@FeignClient\u6ce8\u89e3\u7684\u4e1a\u52a1\u63a5\u53e3<\/p>\n fallback = PaymentFallbackService.class<\/p>\n Controller<\/p>\n \u4e3b\u542f\u52a8<\/p>\n \u6dfb\u52a0@EnableFeignClients\u542f\u52a8Feign\u7684\u529f\u80fd<\/p>\n http:\/\/localhost:84\/consumer\/openfeign\/1<\/a><\/p>\n \u6d4b\u8bd584\u8c03\u75289003\uff0c\u6b64\u65f6\u6545\u610f\u5173\u95ed9003\u5fae\u670d\u52a1\u63d0\u4f9b\u8005\uff0c\u770b84\u6d88\u8d39\u4fa7\u81ea\u52a8\u964d\u7ea7\uff0c\u4e0d\u4f1a\u88ab\u8017\u6b7b<\/p>\n \u662f\u4ec0\u4e48<\/p>\n \u4e00\u65e6\u6211\u4eec\u91cd\u542f\u5e94\u7528\uff0csentinel\u89c4\u5219\u5c06\u6d88\u5931\uff0c\u751f\u4ea7\u73af\u5883\u9700\u8981\u5c06\u914d\u7f6e\u89c4\u5219\u8fdb\u884c\u6301\u4e45\u5316<\/p>\n \u600e\u4e48\u73a9<\/p>\n \u5c06\u9650\u6d41\u914d\u7f6e\u89c4\u5219\u6301\u4e45\u5316\u8fdbNacos\u4fdd\u5b58\uff0c\u53ea\u8981\u5237\u65b08401\u67d0\u4e2arest\u5730\u5740\uff0csentinel\u63a7\u5236\u53f0 \u6b65\u9aa4<\/p>\n \u4fee\u6539cloudalibaba-sentinel-service8401<\/p>\n POM<\/p>\n YML<\/p>\n \u6dfb\u52a0Nacos\u4e1a\u52a1\u89c4\u5219\u914d\u7f6e<\/p>\n \u5feb\u901f\u8bbf\u95ee\u6d4b\u8bd5\u63a5\u53e3<\/p>\nSentinel \u662f\u4ec0\u4e48\uff1f<\/h3>\n
\u53bb\u54ea\u4e0b<\/h3>\n
\u80fd\u5e72\u561b<\/h3>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405568082.png\")
<\/div><\/p>\n\u600e\u4e48\u73a9<\/h3>\n
\u5b89\u88c5Sentinel\u63a7\u5236\u53f0<\/h2>\n
Sentinel \u5206\u4e3a\u4e24\u4e2a\u90e8\u5206:\n\n\u6838\u5fc3\u5e93\uff08Java \u5ba2\u6237\u7aef\uff09\u4e0d\u4f9d\u8d56\u4efb\u4f55\u6846\u67b6\/\u5e93\uff0c\u80fd\u591f\u8fd0\u884c\u4e8e\u6240\u6709 Java \u8fd0\u884c\u65f6\u73af\u5883\uff0c\u540c\u65f6\u5bf9 Dubbo \/ Spring Cloud \u7b49\u6846\u67b6\u4e5f\u6709\u8f83\u597d\u7684\u652f\u6301\u3002\n\u63a7\u5236\u53f0\uff08Dashboard\uff09\u57fa\u4e8e Spring Boot \u5f00\u53d1\uff0c\u6253\u5305\u540e\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\uff0c\u4e0d\u9700\u8981\u989d\u5916\u7684 Tomcat \u7b49\u5e94\u7528\u5bb9\u5668\u3002<\/code><\/pre>\n\u5b89\u88c5\u6b65\u9aa4<\/h3>\n
\u4e0b\u8f7d<\/h3>\n
\u8fd0\u884c\u547d\u4ee4<\/h3>\n
C:\\common\\java\\JDK\\jdk8\\bin>java -jar C:\\Users\\Z\\Downloads\\sentinel-dashboard-1.7.0.jar\nINFO: log output type is: file\nINFO: log charset is: utf-8\nINFO: log base dir is: C:\\Users\\Z\\logs\\csp\\\nINFO: log name use pid is: false<\/code><\/pre>\n\u8bbf\u95eesentinel\u7ba1\u7406\u754c\u9762<\/h3>\n
\u521d\u59cb\u5316\u6f14\u793a\u5de5\u7a0b<\/h2>\n
Module<\/h3>\n
<dependencies>\n <!--SpringCloud ailibaba nacos -->\n <dependency>\n <groupId>com.alibaba.cloud<\/groupId>\n <artifactId>spring-cloud-starter-alibaba-nacos-discovery<\/artifactId>\n <\/dependency>\n <!--SpringCloud ailibaba sentinel-datasource-nacos \u540e\u7eed\u505a\u6301\u4e45\u5316\u7528\u5230-->\n <dependency>\n <groupId>com.alibaba.csp<\/groupId>\n <artifactId>sentinel-datasource-nacos<\/artifactId>\n <\/dependency>\n <!--SpringCloud ailibaba sentinel -->\n <dependency>\n <groupId>com.alibaba.cloud<\/groupId>\n <artifactId>spring-cloud-starter-alibaba-sentinel<\/artifactId>\n <\/dependency>\n <!--openfeign-->\n <dependency>\n <groupId>org.springframework.cloud<\/groupId>\n <artifactId>spring-cloud-starter-openfeign<\/artifactId>\n <\/dependency>\n <!-- SpringBoot\u6574\u5408Web\u7ec4\u4ef6+actuator -->\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-web<\/artifactId>\n <\/dependency>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-actuator<\/artifactId>\n <\/dependency>\n <!--\u65e5\u5e38\u901a\u7528jar\u5305\u914d\u7f6e-->\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-devtools<\/artifactId>\n <scope>runtime<\/scope>\n <optional>true<\/optional>\n <\/dependency>\n <dependency>\n <groupId>cn.hutool<\/groupId>\n <artifactId>hutool-all<\/artifactId>\n <version>4.6.3<\/version>\n <\/dependency>\n <dependency>\n <groupId>org.projectlombok<\/groupId>\n <artifactId>lombok<\/artifactId>\n <optional>true<\/optional>\n <\/dependency>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-test<\/artifactId>\n <scope>test<\/scope>\n <\/dependency>\n\n<\/dependencies><\/code><\/pre>\nserver:\n port: 8401\n\nspring:\n application:\n name: cloudalibaba-sentinel-service\n cloud:\n nacos:\n discovery:\n #Nacos\u670d\u52a1\u6ce8\u518c\u4e2d\u5fc3\u5730\u5740\n server-addr: localhost:8848\n sentinel:\n transport:\n #\u914d\u7f6eSentinel dashboard\u5730\u5740\n dashboard: localhost:8080\n #\u9ed8\u8ba48719\u7aef\u53e3\uff0c\u5047\u5982\u88ab\u5360\u7528\u4f1a\u81ea\u52a8\u4ece8719\u5f00\u59cb\u4f9d\u6b21+1\u626b\u63cf,\u76f4\u81f3\u627e\u5230\u672a\u88ab\u5360\u7528\u7684\u7aef\u53e3\n port: 8719\n\nmanagement:\n endpoints:\n web:\n exposure:\n include: '*'\n<\/code><\/pre>\n@EnableDiscoveryClient\n@SpringBootApplication\npublic class MainApp8401\n{\n public static void main(String[] args) {\n SpringApplication.run(MainApp8401.class, args);\n }\n}<\/code><\/pre>\n@RestController\npublic class FlowLimitController\n{\n\n @GetMapping("\/testA")\n public String testA()\n {\n return "------testA";\n }\n\n @GetMapping("\/testB")\n public String testB()\n {\n return "------testB";\n }\n}<\/code><\/pre>\n\u542f\u52a88401\u5fae\u670d\u52a1\u540e\u67e5\u770bsentienl\u63a7\u5236\u53f0<\/h3>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405615872.png\")
<\/div><\/p>\n\u6d41\u63a7\u89c4\u5219<\/h2>\n
\u57fa\u672c\u4ecb\u7ecd<\/h3>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405627674.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405636739.png\")
<\/div><\/p>\n\u6d41\u63a7\u6a21\u5f0f<\/h3>\n
\u76f4\u63a5(\u9ed8\u8ba4)<\/h4>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405653604.png\")
<\/div><\/p>\n
\nbut,\u662f\u5426\u5e94\u8be5\u6709\u6211\u4eec\u81ea\u5df1\u7684\u540e\u7eed\u5904\u7406?<\/p>\n\u5173\u8054<\/h4>\n
\u662f\u4ec0\u4e48<\/h5>\n
\n\u5f53\u5173\u8054\u8d44\u6e90\/testB\u7684qps\u9600\u503c\u8d85\u8fc71\u65f6\uff0c\u5c31\u9650\u6d41\/testA\u7684Rest\u8bbf\u95ee\u5730\u5740\uff0c\u5f53\u5173\u8054\u8d44\u6e90\u5230\u9608\u503c\u540e\u9650\u5236\u914d\u7f6e\u597d\u7684\u8d44\u6e90\u540d<\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405671213.png\")
<\/div><\/p>\npostman\u6a21\u62df\u5e76\u53d1\u5bc6\u96c6\u8bbf\u95eetestB<\/h5>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405681504.png\")
<\/div><\/p>\nBlocked by Sentinel (flow limiting)<\/code><\/p>\n\u94fe\u8def<\/h4>\n
\u6d41\u63a7\u6548\u679c<\/h2>\n
\u76f4\u63a5->\u5feb\u901f\u5931\u8d25(\u9ed8\u8ba4\u7684\u6d41\u63a7\u5904\u7406)<\/h4>\n
\u9884\u70ed<\/h4>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405708928.png\")
<\/div><\/p>\n
\n\u6848\u4f8b\uff0c\u9600\u503c\u4e3a10+\u9884\u70ed\u65f6\u957f\u8bbe\u7f6e5\u79d2\u3002
\n\u7cfb\u7edf\u521d\u59cb\u5316\u7684\u9600\u503c\u4e3a10 \/ 3 \u7ea6\u7b49\u4e8e3,\u5373\u9600\u503c\u521a\u5f00\u59cb\u4e3a3\uff1b\u7136\u540e\u8fc7\u4e865\u79d2\u540e\u9600\u503c\u624d\u6162\u6162\u5347\u9ad8\u6062\u590d\u523010<\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405722294.png\")
<\/div><\/p>\n\u6392\u961f\u7b49\u5f85<\/h4>\n
\n\u8bbe\u7f6e\u542b\u4e49\uff1a\/testA\u6bcf\u79d21\u6b21\u8bf7\u6c42\uff0c\u8d85\u8fc7\u7684\u8bdd\u5c31\u6392\u961f\u7b49\u5f85\uff0c\u7b49\u5f85\u7684\u8d85\u65f6\u65f6\u95f4\u4e3a20000\u6beb\u79d2\u3002<\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405732723.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405743745.png\")
<\/div><\/p>\n2022-04-30 19:26:20.283 INFO 12528 --- [nio-8401-exec-5] c.s.controller.FlowLimitController : http-nio-8401-exec-5 testA\n2022-04-30 19:26:21.387 INFO 12528 --- [nio-8401-exec-6] c.s.controller.FlowLimitController : http-nio-8401-exec-6 testA\n2022-04-30 19:26:22.488 INFO 12528 --- [nio-8401-exec-7] c.s.controller.FlowLimitController : http-nio-8401-exec-7 testA\n2022-04-30 19:26:23.566 INFO 12528 --- [nio-8401-exec-8] c.s.controller.FlowLimitController : http-nio-8401-exec-8 testA\n2022-04-30 19:26:24.674 INFO 12528 --- [nio-8401-exec-9] c.s.controller.FlowLimitController : http-nio-8401-exec-9 testA\n2022-04-30 19:26:25.788 INFO 12528 --- [io-8401-exec-10] c.s.controller.FlowLimitController : http-nio-8401-exec-10 testA\n2022-04-30 19:26:26.868 INFO 12528 --- [nio-8401-exec-1] c.s.controller.FlowLimitController : http-nio-8401-exec-1 testA\n2022-04-30 19:26:27.973 INFO 12528 --- [nio-8401-exec-2] c.s.controller.FlowLimitController : http-nio-8401-exec-2 testA\n<\/code><\/pre>\n\u964d\u7ea7\u89c4\u5219<\/h2>\n
\n\u5e73\u5747\u54cd\u5e94\u65f6\u95f4 \u8d85\u51fa\u9608\u503c \u4e14 \u5728\u65f6\u95f4\u7a97\u53e3\u5185\u901a\u8fc7\u7684\u8bf7\u6c42>=5\uff0c\u4e24\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\u540e\u89e6\u53d1\u964d\u7ea7
\n\u7a97\u53e3\u671f\u8fc7\u540e\u5173\u95ed\u65ad\u8def\u5668
\nRT\u6700\u59274900\uff08\u66f4\u5927\u7684\u9700\u8981\u901a\u8fc7-Dcsp.sentinel.statistic.max.rt=XXXX\u624d\u80fd\u751f\u6548\uff09<\/p>\n
\nQPS >= 5 \u4e14\u5f02\u5e38\u6bd4\u4f8b\uff08\u79d2\u7ea7\u7edf\u8ba1\uff09\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u89e6\u53d1\u964d\u7ea7\uff1b\u65f6\u95f4\u7a97\u53e3\u7ed3\u675f\u540e\uff0c\u5173\u95ed\u964d\u7ea7<\/p>\n
\n\u5f02\u5e38\u6570\uff08\u5206\u949f\u7edf\u8ba1\uff09\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u89e6\u53d1\u964d\u7ea7\uff1b\u65f6\u95f4\u7a97\u53e3\u7ed3\u675f\u540e\uff0c\u5173\u95ed\u964d\u7ea7<\/p>\n
\n\u8ba9\u8bf7\u6c42\u5feb\u901f\u5931\u8d25\uff0c\u907f\u514d\u5f71\u54cd\u5230\u5176\u5b83\u7684\u8d44\u6e90\u800c\u5bfc\u81f4\u7ea7\u8054\u9519\u8bef\u3002<\/p>\n
\n\u6ca1\u6709\u5f02\u5e38\u5c31\u5173\u95ed\u65ad\u8def\u5668\u6062\u590d\u4f7f\u7528\uff0c
\n\u6709\u5f02\u5e38\u5219\u7ee7\u7eed\u6253\u5f00\u65ad\u8def\u5668\u4e0d\u53ef\u7528\u3002\u5177\u4f53\u53ef\u4ee5\u53c2\u8003Hystrix<\/p>\n\u964d\u7ea7\u7b56\u7565\u5b9e\u6218<\/h3>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405766245.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405774729.png\")
<\/div><\/p>\n@GetMapping("\/testD")\npublic String testD()\n{\n \/\/\u6682\u505c\u51e0\u79d2\u949f\u7ebf\u7a0b\n try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); }\n log.info("testD \u6d4b\u8bd5RT");\n return "------testD";\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405797960.png\")
<\/div><\/p>\n
\n\u5982\u679c\u8d85\u8fc7200\u6beb\u79d2\u8fd8\u6ca1\u5904\u7406\u5b8c\uff0c\u5728\u672a\u67651\u79d2\u949f\u7684\u65f6\u95f4\u7a97\u53e3\u5185\uff0c\u65ad\u8def\u5668\u6253\u5f00(\u4fdd\u9669\u4e1d\u8df3\u95f8)\u5fae\u670d\u52a1\u4e0d\u53ef\u7528\uff0c\u4fdd\u9669\u4e1d\u8df3\u95f8\u65ad\u7535\u4e86<\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405815073.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405821646.png\")
<\/div><\/p>\n@GetMapping("\/testD")\npublic String testD()\n{\n log.info("testD \u6d4b\u8bd5\u6bd4\u4f8b");\n int age = 10\/0;\n return "------testD";\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405831745.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405838727.png\")
<\/div><\/p>\n
\n\u5355\u72ec\u8bbf\u95ee\u4e00\u6b21\uff0c\u5fc5\u7136\u6765\u4e00\u6b21\u62a5\u9519\u4e00\u6b21(int age = 10\/0)\uff0c\u8c03\u4e00\u6b21\u9519\u4e00\u6b21\uff1b<\/p>\n
\n\u65ad\u8def\u5668\u5f00\u542f(\u4fdd\u9669\u4e1d\u8df3\u95f8)\uff0c\u5fae\u670d\u52a1\u4e0d\u53ef\u7528\u4e86\uff0c\u4e0d\u518d\u62a5\u9519error\u800c\u662f\u670d\u52a1\u964d\u7ea7\u4e86\u3002<\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405856265.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405864327.png\")
<\/div><\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405875412.png\")
<\/div><\/p>\n@GetMapping("\/testD")\npublic String testE()\n{\n log.info("testD \u6d4b\u8bd5\u5f02\u5e38\u6570");\n int age = 10\/0;\n return "------testD \u6d4b\u8bd5\u5f02\u5e38\u6570";\n}<\/code><\/pre>\n
\n\u6211\u4eec\u770b\u5230error\u7a97\u53e3\uff0c\u4f46\u662f\u8fbe\u52305\u6b21\u62a5\u9519\u540e\uff0c\u8fdb\u5165\u7194\u65ad\u540e\u964d\u7ea7\u3002<\/p>\n\u70ed\u70b9key\u9650\u6d41<\/h2>\n
\n\u70ed\u70b9\u5373\u7ecf\u5e38\u8bbf\u95ee\u7684\u6570\u636e\uff0c\u5f88\u591a\u65f6\u5019\u6211\u4eec\u5e0c\u671b\u7edf\u8ba1\u6216\u8005\u9650\u5236\u67d0\u4e2a\u70ed\u70b9\u6570\u636e\u4e2d\u8bbf\u95ee\u9891\u6b21\u6700\u9ad8\u7684TopN\u6570\u636e\uff0c\u5e76\u5bf9\u5176\u8bbf\u95ee\u8fdb\u884c\u9650\u6d41\u6216\u8005\u5176\u5b83\u64cd\u4f5c<\/p>\n
\n\u5206\u4e3a\u7cfb\u7edf\u9ed8\u8ba4\u548c\u5ba2\u6237\u81ea\u5b9a\u4e49\uff0c\u4e24\u79cd<\/p>\n
\n\u4eceHystrixCommand \u5230@SentinelResource<\/p>\n\n@GetMapping("\/testHotKey")\n@SentinelResource(value = "testHotKey",blockHandler = "dealHandler_testHotKey")\npublic String testHotKey(@RequestParam(value = "p1",required = false) String p1,\n @RequestParam(value = "p2",required = false) String p2){\n return "------testHotKey";\n}\npublic String dealHandler_testHotKey(String p1,String p2,BlockException exception)\n{\n return "-----dealHandler_testHotKey";\n}\n\n \/\/sentinel\u7cfb\u7edf\u9ed8\u8ba4\u7684\u63d0\u793a\uff1aBlocked by Sentinel (flow limiting)\n<\/code><\/pre>\n\u914d\u7f6e<\/h3>\n
\n@SentinelResource\u6ce8\u89e3\u7684\u65b9\u6cd5\u53c2\u6570\u7d22\u5f15\uff0c0\u4ee3\u8868\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c1\u4ee3\u8868\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u4ee5\u6b64\u7c7b\u63a8
\n\u5355\u673a\u9600\u503c\u4ee5\u53ca\u7edf\u8ba1\u7a97\u53e3\u65f6\u957f\u8868\u793a\u5728\u6b64\u7a97\u53e3\u65f6\u95f4\u8d85\u8fc7\u9600\u503c\u5c31\u9650\u6d41\u3002
\n\u4e0a\u9762\u7684\u6293\u56fe\u5c31\u662f\u7b2c\u4e00\u4e2a\u53c2\u6570\u6709\u503c\u7684\u8bdd\uff0c1\u79d2\u7684QPS\u4e3a1\uff0c\u8d85\u8fc7\u5c31\u9650\u6d41\uff0c\u9650\u6d41\u540e\u8c03\u7528dealHandler_testHotKey\u652f\u6301\u65b9\u6cd5\u3002<\/p>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405907843.png\")
<\/div><\/p>\n\u53c2\u6570\u4f8b\u5916\u9879<\/h3>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405925995.png\")
<\/div><\/p>\n\u524d\u63d0\u6761\u4ef6<\/strong><\/h3>\n
\u5176\u5b83<\/h3>\n
\n\u5904\u7406\u7684\u662fSentinel\u63a7\u5236\u53f0\u914d\u7f6e\u7684\u8fdd\u89c4\u60c5\u51b5\uff0c\u6709blockHandler\u65b9\u6cd5\u914d\u7f6e\u7684\u515c\u5e95\u5904\u7406\uff1b<\/p>\n
\nint age = 10\/0,\u8fd9\u4e2a\u662fjava\u8fd0\u884c\u65f6\u62a5\u51fa\u7684\u8fd0\u884c\u65f6\u5f02\u5e38RunTimeException\uff0c@SentinelResource\u4e0d\u7ba1<\/p>\n
\n@SentinelResource\u4e3b\u7ba1\u914d\u7f6e\u51fa\u9519\uff0c\u8fd0\u884c\u51fa\u9519\u8be5\u8d70\u5f02\u5e38\u8d70\u5f02\u5e38<\/p>\n\u7cfb\u7edf\u89c4\u5219<\/h2>\n
\u7cfb\u7edf\u89c4\u5219\n\u7cfb\u7edf\u4fdd\u62a4\u89c4\u5219\u662f\u4ece\u5e94\u7528\u7ea7\u522b\u7684\u5165\u53e3\u6d41\u91cf\u8fdb\u884c\u63a7\u5236\uff0c\u4ece\u5355\u53f0\u673a\u5668\u7684 load\u3001CPU \u4f7f\u7528\u7387\u3001\u5e73\u5747 RT\u3001\u5165\u53e3 QPS \u548c\u5e76\u53d1\u7ebf\u7a0b\u6570\u7b49\u51e0\u4e2a\u7ef4\u5ea6\u76d1\u63a7\u5e94\u7528\u6307\u6807\uff0c\u8ba9\u7cfb\u7edf\u5c3d\u53ef\u80fd\u8dd1\u5728\u6700\u5927\u541e\u5410\u91cf\u7684\u540c\u65f6\u4fdd\u8bc1\u7cfb\u7edf\u6574\u4f53\u7684\u7a33\u5b9a\u6027\u3002\n\n\u7cfb\u7edf\u4fdd\u62a4\u89c4\u5219\u662f\u5e94\u7528\u6574\u4f53\u7ef4\u5ea6\u7684\uff0c\u800c\u4e0d\u662f\u8d44\u6e90\u7ef4\u5ea6\u7684\uff0c\u5e76\u4e14\u4ec5\u5bf9\u5165\u53e3\u6d41\u91cf\u751f\u6548\u3002\u5165\u53e3\u6d41\u91cf\u6307\u7684\u662f\u8fdb\u5165\u5e94\u7528\u7684\u6d41\u91cf\uff08EntryType.IN\uff09\uff0c\u6bd4\u5982 Web \u670d\u52a1\u6216 Dubbo \u670d\u52a1\u7aef\u63a5\u6536\u7684\u8bf7\u6c42\uff0c\u90fd\u5c5e\u4e8e\u5165\u53e3\u6d41\u91cf\u3002\n\n\u7cfb\u7edf\u89c4\u5219\u652f\u6301\u4ee5\u4e0b\u7684\u6a21\u5f0f\uff1a\n\nLoad \u81ea\u9002\u5e94\uff08\u4ec5\u5bf9 Linux\/Unix-like \u673a\u5668\u751f\u6548\uff09\uff1a\u7cfb\u7edf\u7684 load1 \u4f5c\u4e3a\u542f\u53d1\u6307\u6807\uff0c\u8fdb\u884c\u81ea\u9002\u5e94\u7cfb\u7edf\u4fdd\u62a4\u3002\u5f53\u7cfb\u7edf load1 \u8d85\u8fc7\u8bbe\u5b9a\u7684\u542f\u53d1\u503c\uff0c\u4e14\u7cfb\u7edf\u5f53\u524d\u7684\u5e76\u53d1\u7ebf\u7a0b\u6570\u8d85\u8fc7\u4f30\u7b97\u7684\u7cfb\u7edf\u5bb9\u91cf\u65f6\u624d\u4f1a\u89e6\u53d1\u7cfb\u7edf\u4fdd\u62a4\uff08BBR \u9636\u6bb5\uff09\u3002\u7cfb\u7edf\u5bb9\u91cf\u7531\u7cfb\u7edf\u7684 maxQps * minRt \u4f30\u7b97\u5f97\u51fa\u3002\u8bbe\u5b9a\u53c2\u8003\u503c\u4e00\u822c\u662f CPU cores * 2.5\u3002\nCPU usage\uff081.5.0+ \u7248\u672c\uff09\uff1a\u5f53\u7cfb\u7edf CPU \u4f7f\u7528\u7387\u8d85\u8fc7\u9608\u503c\u5373\u89e6\u53d1\u7cfb\u7edf\u4fdd\u62a4\uff08\u53d6\u503c\u8303\u56f4 0.0-1.0\uff09\uff0c\u6bd4\u8f83\u7075\u654f\u3002\n\u5e73\u5747 RT\uff1a\u5f53\u5355\u53f0\u673a\u5668\u4e0a\u6240\u6709\u5165\u53e3\u6d41\u91cf\u7684\u5e73\u5747 RT \u8fbe\u5230\u9608\u503c\u5373\u89e6\u53d1\u7cfb\u7edf\u4fdd\u62a4\uff0c\u5355\u4f4d\u662f\u6beb\u79d2\u3002\n\u5e76\u53d1\u7ebf\u7a0b\u6570\uff1a\u5f53\u5355\u53f0\u673a\u5668\u4e0a\u6240\u6709\u5165\u53e3\u6d41\u91cf\u7684\u5e76\u53d1\u7ebf\u7a0b\u6570\u8fbe\u5230\u9608\u503c\u5373\u89e6\u53d1\u7cfb\u7edf\u4fdd\u62a4\u3002\n\u5165\u53e3 QPS\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<\/code><\/pre>\n@SentinelResource<\/h2>\n
\u6309\u8d44\u6e90\u540d\u79f0\u9650\u6d41+\u540e\u7eed\u5904\u7406<\/h3>\n
<dependency><!-- \u5f15\u5165\u81ea\u5df1\u5b9a\u4e49\u7684api\u901a\u7528\u5305\uff0c\u53ef\u4ee5\u4f7f\u7528Payment\u652f\u4ed8Entity -->\n <groupId>com.springcloud<\/groupId>\n <artifactId>cloud-api-commons<\/artifactId>\n <version>${project.version}<\/version>\n<\/dependency><\/code><\/pre>\n@GetMapping("\/byResource")\n@SentinelResource(value = "byResource",blockHandler = "handleException")\npublic CommonResult byResource()\n{\n return new CommonResult(200,"\u6309\u8d44\u6e90\u540d\u79f0\u9650\u6d41\u6d4b\u8bd5OK",new Payment(2020L,"serial001"));\n}\npublic CommonResult handleException(BlockException exception)\n{\n return new CommonResult(444,exception.getClass().getCanonicalName()+"\\t \u670d\u52a1\u4e0d\u53ef\u7528");\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405957275.png\")
<\/div><\/p>\n\u6d4b\u8bd5<\/h4>\n
{\n"code": 444,\n"message": "com.alibaba.csp.sentinel.slots.block.flow.FlowException\\t \u670d\u52a1\u4e0d\u53ef\u7528",\n"data": null\n}<\/code><\/pre>\n\u989d\u5916\u95ee\u9898<\/h4>\n
\u6309\u7167Url\u5730\u5740\u9650\u6d41+\u540e\u7eed\u5904\u7406<\/h3>\n
@GetMapping("\/rateLimit\/byUrl")\n@SentinelResource(value = "byUrl")\npublic CommonResult byUrl()\n{\n return new CommonResult(200,"\u6309url\u9650\u6d41\u6d4b\u8bd5OK",new Payment(2020L,"serial002"));\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651405971863.png\")
<\/div><\/p>\nBlocked by Sentinel (flow limiting)<\/code><\/p>\n\u4e0a\u9762\u515c\u5e95\u65b9\u6848\u9762\u4e34\u7684\u95ee\u9898<\/h3>\n
\u5ba2\u6237\u81ea\u5b9a\u4e49\u9650\u6d41\u5904\u7406\u903b\u8f91<\/h3>\n
public class CustomerBlockHandler\n{\n public static CommonResult handleException(BlockException exception){\n return new CommonResult(2020,"\u81ea\u5b9a\u4e49\u7684\u9650\u6d41\u5904\u7406\u4fe1\u606f......CustomerBlockHandler");\n }\n}<\/code><\/pre>\n\/**\n * \u81ea\u5b9a\u4e49\u901a\u7528\u7684\u9650\u6d41\u5904\u7406\u903b\u8f91\uff0c\n blockHandlerClass = CustomerBlockHandler.class\n blockHandler = handleException2\n \u4e0a\u8ff0\u914d\u7f6e\uff1a\u627eCustomerBlockHandler\u7c7b\u91cc\u7684handleException2\u65b9\u6cd5\u8fdb\u884c\u515c\u5e95\u5904\u7406\n *\/\n\/**\n * \u81ea\u5b9a\u4e49\u901a\u7528\u7684\u9650\u6d41\u5904\u7406\u903b\u8f91\n *\/\n@GetMapping("\/rateLimit\/customerBlockHandler")\n@SentinelResource(value = "customerBlockHandler",\n blockHandlerClass = CustomerBlockHandler.class, blockHandler = "handleException")\npublic CommonResult customerBlockHandler()\n{\n return new CommonResult(200,"\u6309\u5ba2\u6237\u81ea\u5b9a\u4e49\u9650\u6d41\u5904\u7406\u903b\u8f91");\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651406021637.png\")
<\/div><\/p>\n\u66f4\u591a\u6ce8\u89e3\u5c5e\u6027\u8bf4\u660e<\/h3>\n
\u670d\u52a1\u7194\u65ad\u529f\u80fd<\/h2>\n
Ribbon\u7cfb\u5217<\/h3>\n
\u63d0\u4f9b\u80059003\/9004<\/h4>\n
<dependencies>\n <!--SpringCloud ailibaba nacos -->\n <dependency>\n <groupId>com.alibaba.cloud<\/groupId>\n <artifactId>spring-cloud-starter-alibaba-nacos-discovery<\/artifactId>\n <\/dependency>\n <dependency><!-- \u5f15\u5165\u81ea\u5df1\u5b9a\u4e49\u7684api\u901a\u7528\u5305\uff0c\u53ef\u4ee5\u4f7f\u7528Payment\u652f\u4ed8Entity -->\n <groupId>com.springcloud<\/groupId>\n <artifactId>cloud-api-commons<\/artifactId>\n <version>${project.version}<\/version>\n <\/dependency>\n <!-- SpringBoot\u6574\u5408Web\u7ec4\u4ef6 -->\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-web<\/artifactId>\n <\/dependency>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-actuator<\/artifactId>\n <\/dependency>\n <!--\u65e5\u5e38\u901a\u7528jar\u5305\u914d\u7f6e-->\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-devtools<\/artifactId>\n <scope>runtime<\/scope>\n <optional>true<\/optional>\n <\/dependency>\n <dependency>\n <groupId>org.projectlombok<\/groupId>\n <artifactId>lombok<\/artifactId>\n <optional>true<\/optional>\n <\/dependency>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-test<\/artifactId>\n <scope>test<\/scope>\n <\/dependency>\n<\/dependencies><\/code><\/pre>\nserver:\n port: 9003\n\nspring:\n application:\n name: nacos-payment-provider\n cloud:\n nacos:\n discovery:\n server-addr: localhost:8848 #\u914d\u7f6eNacos\u5730\u5740\n\nmanagement:\n endpoints:\n web:\n exposure:\n include: '*'<\/code><\/pre>\n@SpringBootApplication\n@EnableDiscoveryClient\npublic class PaymentMain9003\n{\n public static void main(String[] args) {\n SpringApplication.run(PaymentMain9003.class, args);\n }\n}<\/code><\/pre>\n@RestController\npublic class PaymentController\n{\n @Value("${server.port}")\n private String serverPort;\n\n public static HashMap<Long, Payment> hashMap = new HashMap<>();\n static\n {\n hashMap.put(1L,new Payment(1L,"28a8c1e3bc2742d8848569891fb42181"));\n hashMap.put(2L,new Payment(2L,"bba8c1e3bc2742d8848569891ac32182"));\n hashMap.put(3L,new Payment(3L,"6ua8c1e3bc2742d8848569891xt92183"));\n }\n\n @GetMapping(value = "\/paymentSQL\/{id}")\n public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id)\n {\n Payment payment = hashMap.get(id);\n CommonResult<Payment> result = new CommonResult(200,"from mysql,serverPort: "+serverPort,payment);\n return result;\n }\n\n}<\/code><\/pre>\n\u6d88\u8d39\u800584<\/h4>\n
<dependencies>\n <!--SpringCloud ailibaba nacos -->\n <dependency>\n <groupId>com.alibaba.cloud<\/groupId>\n <artifactId>spring-cloud-starter-alibaba-nacos-discovery<\/artifactId>\n <\/dependency>\n <!--SpringCloud ailibaba sentinel -->\n <dependency>\n <groupId>com.alibaba.cloud<\/groupId>\n <artifactId>spring-cloud-starter-alibaba-sentinel<\/artifactId>\n <\/dependency>\n <!-- \u5f15\u5165\u81ea\u5df1\u5b9a\u4e49\u7684api\u901a\u7528\u5305\uff0c\u53ef\u4ee5\u4f7f\u7528Payment\u652f\u4ed8Entity -->\n <dependency>\n <groupId>com.springcloud<\/groupId>\n <artifactId>cloud-api-commons<\/artifactId>\n <version>${project.version}<\/version>\n <\/dependency>\n <!-- SpringBoot\u6574\u5408Web\u7ec4\u4ef6 -->\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-web<\/artifactId>\n <\/dependency>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-actuator<\/artifactId>\n <\/dependency>\n <!--\u65e5\u5e38\u901a\u7528jar\u5305\u914d\u7f6e-->\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-devtools<\/artifactId>\n <scope>runtime<\/scope>\n <optional>true<\/optional>\n <\/dependency>\n <dependency>\n <groupId>org.projectlombok<\/groupId>\n <artifactId>lombok<\/artifactId>\n <optional>true<\/optional>\n <\/dependency>\n <dependency>\n <groupId>org.springframework.boot<\/groupId>\n <artifactId>spring-boot-starter-test<\/artifactId>\n <scope>test<\/scope>\n <\/dependency>\n<\/dependencies><\/code><\/pre>\nserver:\n port: 84\n\nspring:\n application:\n name: nacos-order-consumer\n cloud:\n nacos:\n discovery:\n server-addr: localhost:8848\n sentinel:\n transport:\n #\u914d\u7f6eSentinel dashboard\u5730\u5740\n dashboard: localhost:8080\n #\u9ed8\u8ba48719\u7aef\u53e3\uff0c\u5047\u5982\u88ab\u5360\u7528\u4f1a\u81ea\u52a8\u4ece8719\u5f00\u59cb\u4f9d\u6b21+1\u626b\u63cf,\u76f4\u81f3\u627e\u5230\u672a\u88ab\u5360\u7528\u7684\u7aef\u53e3\n port: 8719\n\n#\u6d88\u8d39\u8005\u5c06\u8981\u53bb\u8bbf\u95ee\u7684\u5fae\u670d\u52a1\u540d\u79f0(\u6ce8\u518c\u6210\u529f\u8fdbnacos\u7684\u5fae\u670d\u52a1\u63d0\u4f9b\u8005)\nservice-url:\n nacos-user-service: http:\/\/nacos-payment-provider<\/code><\/pre>\n@EnableDiscoveryClient\n@SpringBootApplication\npublic class OrderNacosMain84\n{\n public static void main(String[] args) {\n SpringApplication.run(OrderNacosMain84.class, args);\n }\n}<\/code><\/pre>\n@Configuration\npublic class ApplicationContextConfig\n{\n @Bean\n @LoadBalanced\n public RestTemplate getRestTemplate()\n {\n return new RestTemplate();\n }\n}<\/code><\/pre>\n@RestController\n@Slf4j\npublic class CircleBreakerController\n{\n public static final String SERVICE_URL = "http:\/\/nacos-payment-provider";\n\n @Resource\n private RestTemplate restTemplate;\n\n @RequestMapping("\/consumer\/fallback\/{id}")\n @SentinelResource(value = "fallback")\n public CommonResult<Payment> fallback(@PathVariable Long id)\n {\n CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "\/paymentSQL\/"+id,CommonResult.class,id);\n\n if (id == 4) {\n throw new IllegalArgumentException ("IllegalArgumentException,\u975e\u6cd5\u53c2\u6570\u5f02\u5e38....");\n }else if (result.getData() == null) {\n throw new NullPointerException ("NullPointerException,\u8be5ID\u6ca1\u6709\u5bf9\u5e94\u8bb0\u5f55,\u7a7a\u6307\u9488\u5f02\u5e38");\n }\n\n return result;\n }\n\n}<\/code><\/pre>\n@RequestMapping("\/consumer\/fallback\/{id}")\n@SentinelResource(value = "fallback",fallback = "handlerFallback") \/\/fallback\u8d1f\u8d23\u4e1a\u52a1\u5f02\u5e38\npublic CommonResult<Payment> fallback(@PathVariable Long id)\n{\n CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "\/paymentSQL\/"+id, CommonResult.class,id);\n\n if (id == 4) {\n throw new IllegalArgumentException ("IllegalArgumentException,\u975e\u6cd5\u53c2\u6570\u5f02\u5e38....");\n }else if (result.getData() == null) {\n throw new NullPointerException ("NullPointerException,\u8be5ID\u6ca1\u6709\u5bf9\u5e94\u8bb0\u5f55,\u7a7a\u6307\u9488\u5f02\u5e38");\n }\n\n return result;\n}\npublic CommonResult handlerFallback(@PathVariable Long id,Throwable e) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(444,"\u515c\u5e95\u5f02\u5e38handlerFallback,exception\u5185\u5bb9 "+e.getMessage(),payment);\n}<\/code><\/pre>\n{\n"code": 200,\n"message": "from mysql,serverPort: 9004",\n"data": {\n"id": 1,\n"serial": "28a8c1e3bc2742d8848569891fb42181"\n}\n}<\/code><\/pre>\n{\n"code": 444,\n"message": "\u515c\u5e95\u5f02\u5e38handlerFallback,exception\u5185\u5bb9 IllegalArgumentException,\u975e\u6cd5\u53c2\u6570\u5f02\u5e38....",\n"data": {\n"id": 4,\n"serial": "null"\n}\n}<\/code><\/pre>\n@RequestMapping("\/consumer\/fallback\/{id}")\n@SentinelResource(value = "fallback",blockHandler = "blockHandler") \/\/blockHandler\u8d1f\u8d23\u5728sentinel\u91cc\u9762\u914d\u7f6e\u7684\u964d\u7ea7\u9650\u6d41\npublic CommonResult<Payment> fallback(@PathVariable Long id)\n{\n CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "\/paymentSQL\/"+id, CommonResult.class,id);\n if (id == 4) {\n throw new IllegalArgumentException ("\u975e\u6cd5\u53c2\u6570\u5f02\u5e38....");\n }else if (result.getData() == null) {\n throw new NullPointerException ("NullPointerException,\u8be5ID\u6ca1\u6709\u5bf9\u5e94\u8bb0\u5f55");\n }\n return result;\n}\npublic CommonResult handlerFallback(@PathVariable Long id,Throwable e) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(444,"fallback,\u65e0\u6b64\u6d41\u6c34,exception "+e.getMessage(),payment);\n}\npublic CommonResult blockHandler(@PathVariable Long id, BlockException blockException) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(445,"blockHandler-sentinel\u9650\u6d41,\u65e0\u6b64\u6d41\u6c34: blockException "+blockException.getMessage(),payment);\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651408258165.png\")
<\/div><\/p>\n{\n"code": 200,\n"message": "from mysql,serverPort: 9004",\n"data": {\n"id": 1,\n"serial": "28a8c1e3bc2742d8848569891fb42181"\n}\n}<\/code><\/pre>\n{\n"code": 445,\n"message": "blockHandler-sentinel\u9650\u6d41,\u65e0\u6b64\u6d41\u6c34: blockException null",\n"data": {\n"id": 4,\n"serial": "null"\n}\n}<\/code><\/pre>\n@RequestMapping("\/consumer\/fallback\/{id}")\n@SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler")\npublic CommonResult<Payment> fallback(@PathVariable Long id)\n{\n CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "\/paymentSQL\/"+id, CommonResult.class,id);\n if (id == 4) {\n throw new IllegalArgumentException ("\u975e\u6cd5\u53c2\u6570\u5f02\u5e38....");\n }else if (result.getData() == null) {\n throw new NullPointerException ("NullPointerException,\u8be5ID\u6ca1\u6709\u5bf9\u5e94\u8bb0\u5f55");\n }\n return result;\n}\npublic CommonResult handlerFallback(@PathVariable Long id,Throwable e) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(444,"fallback,\u65e0\u6b64\u6d41\u6c34,exception "+e.getMessage(),payment);\n}\npublic CommonResult blockHandler(@PathVariable Long id, BlockException blockException) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(445,"blockHandler-sentinel\u9650\u6d41,\u65e0\u6b64\u6d41\u6c34: blockException "+blockException.getMessage(),payment);\n}<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651408284056.png\")
<\/div><\/p>\n @RequestMapping("\/consumer\/fallback\/{id}")\n @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler",\n exceptionsToIgnore = {IllegalArgumentException.class})\n public CommonResult<Payment> fallback(@PathVariable Long id)\n {\n CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "\/paymentSQL\/"+id,CommonResult.class,id);\n if (id == 4) {\n throw new IllegalArgumentException ("\u975e\u6cd5\u53c2\u6570\u5f02\u5e38....");\n }else if (result.getData() == null) {\n throw new NullPointerException ("NullPointerException,\u8be5ID\u6ca1\u6709\u5bf9\u5e94\u8bb0\u5f55");\n }\n return result;\n }\n public CommonResult handlerFallback(@PathVariable Long id,Throwable e) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(444,"fallback,\u65e0\u6b64\u6d41\u6c34,exception "+e.getMessage(),payment);\n }\n public CommonResult blockHandler(@PathVariable Long id,BlockException blockException) {\n Payment payment = new Payment(id,"null");\n return new CommonResult<>(445,"blockHandler-sentinel\u9650\u6d41,\u65e0\u6b64\u6d41\u6c34: blockException "+blockException.getMessage(),payment);\n }\n<\/code><\/pre>\nFeign\u7cfb\u5217<\/h3>\n
<!--SpringCloud openfeign -->\n<dependency>\n <groupId>org.springframework.cloud<\/groupId>\n <artifactId>spring-cloud-starter-openfeign<\/artifactId>\n<\/dependency><\/code><\/pre>\n# \u6fc0\u6d3bSentinel\u5bf9Feign\u7684\u652f\u6301\nfeign:\n sentinel:\n enabled: true\n<\/code><\/pre>\n@FeignClient(value = "nacos-payment-provider",fallback = PaymentFallbackService.class)\/\/\u8c03\u7528\u4e2d\u5173\u95ed9003\u670d\u52a1\u63d0\u4f9b\u8005\npublic interface PaymentService\n{\n @GetMapping(value = "\/paymentSQL\/{id}")\n public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id);\n}<\/code><\/pre>\n@Component\npublic class PaymentFallbackService implements PaymentService\n{\n @Override\n public CommonResult<Payment> paymentSQL(Long id)\n {\n return new CommonResult<>(444,"\u670d\u52a1\u964d\u7ea7\u8fd4\u56de,\u6ca1\u6709\u8be5\u6d41\u6c34\u4fe1\u606f",new Payment(id, "errorSerial......"));\n }\n}<\/code><\/pre>\n\/\/==================OpenFeign\n@Resource\nprivate PaymentService paymentService;\n\n@GetMapping(value = "\/consumer\/openfeign\/{id}")\npublic CommonResult<Payment> paymentSQL(@PathVariable("id") Long id)\n{\n if(id == 4)\n {\n throw new RuntimeException("\u6ca1\u6709\u8be5id");\n }\n return paymentService.paymentSQL(id);\n}<\/code><\/pre>\n@EnableDiscoveryClient\n@SpringBootApplication\n@EnableFeignClients\npublic class OrderNacosMain84\n{\n public static void main(String[] args) {\n SpringApplication.run(OrderNacosMain84.class, args);\n }\n}<\/code><\/pre>\n\u7194\u65ad\u6846\u67b6\u6bd4\u8f83<\/h3>\n
![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651408309378.png\")
<\/div><\/p>\n\u89c4\u5219\u6301\u4e45\u5316<\/h2>\n
\n\u7684\u6d41\u63a7\u89c4\u5219\u5c31\u80fd\u770b\u5230\uff0c\u53ea\u8981Nacos\u91cc\u9762\u7684\u914d\u7f6e\u4e0d\u5220\u9664\uff0c\u9488\u5bf98401\u4e0asentinel\u4e0a\u7684\u6d41\u63a7\u89c4\u5219\u6301\u7eed\u6709\u6548<\/p>\n<!--SpringCloud ailibaba sentinel-datasource-nacos -->\n<dependency>\n <groupId>com.alibaba.csp<\/groupId>\n <artifactId>sentinel-datasource-nacos<\/artifactId>\n<\/dependency><\/code><\/pre>\nspring:\n application:\n name: cloudalibaba-sentinel-service\n cloud:\n nacos:\n discovery:\n #Nacos\u670d\u52a1\u6ce8\u518c\u4e2d\u5fc3\u5730\u5740\n server-addr: localhost:8848\n sentinel:\n transport:\n #\u914d\u7f6eSentinel dashboard\u5730\u5740\n dashboard: localhost:8080\n #\u9ed8\u8ba48719\u7aef\u53e3\uff0c\u5047\u5982\u88ab\u5360\u7528\u4f1a\u81ea\u52a8\u4ece8719\u5f00\u59cb\u4f9d\u6b21+1\u626b\u63cf,\u76f4\u81f3\u627e\u5230\u672a\u88ab\u5360\u7528\u7684\u7aef\u53e3\n port: 8719\n datasource:\n ds1:\n nacos:\n server-addr: localhost:8848\n dataId: cloudalibaba-sentinel-service\n groupId: DEFAULT_GROUP\n data-type: json\n rule-type: flow<\/code><\/pre>\n![\"file\"](\"https:\/\/bucket-blog-img.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2022\/05\/image-1651408328777.png\")
<\/div><\/p>\n[\n {\n "resource": "\/rateLimit\/byUrl",\n "limitApp": "default",\n "grade": 1,\n "count": 1,\n "strategy": 0,\n "controlBehavior": 0,\n "clusterMode": false\n }\n]\n\nresource\uff1a\u8d44\u6e90\u540d\u79f0\uff1b\nlimitApp\uff1a\u6765\u6e90\u5e94\u7528\uff1b\ngrade\uff1a\u9608\u503c\u7c7b\u578b\uff0c0\u8868\u793a\u7ebf\u7a0b\u6570\uff0c1\u8868\u793aQPS\uff1b\ncount\uff1a\u5355\u673a\u9608\u503c\uff1b\nstrategy\uff1a\u6d41\u63a7\u6a21\u5f0f\uff0c0\u8868\u793a\u76f4\u63a5\uff0c1\u8868\u793a\u5173\u8054\uff0c2\u8868\u793a\u94fe\u8def\uff1b\ncontrolBehavior\uff1a\u6d41\u63a7\u6548\u679c\uff0c0\u8868\u793a\u5feb\u901f\u5931\u8d25\uff0c1\u8868\u793aWarm Up\uff0c2\u8868\u793a\u6392\u961f\u7b49\u5f85\uff1b\nclusterMode\uff1a\u662f\u5426\u96c6\u7fa4\u3002<\/code><\/pre>\n