{"id":475,"date":"2023-11-01T11:27:59","date_gmt":"2023-11-01T03:27:59","guid":{"rendered":"https:\/\/www.talktop.cn\/?p=475"},"modified":"2024-12-30T09:43:08","modified_gmt":"2024-12-30T01:43:08","slug":"springcloud%e7%9a%84%e5%be%ae%e6%9c%8d%e5%8a%a1%e7%86%94%e6%96%ad%e9%99%8d%e7%ba%a7","status":"publish","type":"post","link":"https:\/\/www.talktop.cn\/?p=475","title":{"rendered":"SpringCloud\u7684\u5fae\u670d\u52a1 \u7194\u65ad\u964d\u7ea7"},"content":{"rendered":"\n

\u4e00\u3001\u4ecb\u7ecd<\/strong><\/p>\n\n\n\n

\u7194\u65ad\u964d\u7ea7\u662f\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\u7684\u5173\u952e\u673a\u5236\uff0c\u7528\u4e8e\u786e\u4fdd\u7cfb\u7edf\u5728\u9762\u5bf9\u6545\u969c\u65f6\u4fdd\u6301\u9ad8\u53ef\u7528\u6027\u3002Spring Boot\u901a\u8fc7\u6574\u5408Hystrix\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u7194\u65ad\u964d\u7ea7\u529f\u80fd\u3002<\/p>\n\n\n\n

\u4e8c\u3001\u6e90\u7801\u89e3\u8bfb<\/strong><\/p>\n\n\n\n

\uff081\uff09HystrixCommand\u4f4d\u7f6e<\/strong>\uff1acom.netflix.hystrix.HystrixCommand<\/code><\/p>\n\n\n\n

public abstract class HystrixCommand<R> implements HystrixExecutable<R> {\n    \/\/ ...\u5176\u4ed6\u5c5e\u6027\u548c\u65b9\u6cd5\n    protected abstract R run() throws Exception;\n    protected R getFallback() {\n        return null;\n    }\n}<\/code><\/pre>\n\n\n\n
\u89e3\u8bfb<\/strong>\uff1aHystrixCommand<\/code>\u662fHystrix\u7684\u6838\u5fc3\u7c7b\uff0c\u7528\u4e8e\u6267\u884c\u5177\u6709\u7194\u65ad\u529f\u80fd\u7684\u547d\u4ee4\u3002run<\/code>\u65b9\u6cd5\u662f\u9700\u8981\u6267\u884c\u7684\u4e1a\u52a1\u903b\u8f91\uff0cgetFallback<\/code>\u65b9\u6cd5\u662f\u5728\u547d\u4ee4\u6267\u884c\u5931\u8d25\u65f6\u7684\u5907\u9009\u65b9\u6848\u3002<\/p>\n\n\n\n
\uff082\uff09HystrixCircuitBreaker<\/strong><\/p>\n\n\n\n
\u4f4d\u7f6e<\/strong>\uff1acom.netflix.hystrix.HystrixCircuitBreaker<\/code><\/p>\n\n\n\n
public interface HystrixCircuitBreaker {\n    boolean allowRequest();\n    void markSuccess();\n}<\/code><\/pre>\n\n\n\n
\u89e3\u8bfb<\/strong>\uff1aHystrixCircuitBreaker<\/code>\u63a5\u53e3\u5b9a\u4e49\u4e86\u7194\u65ad\u5668\u7684\u57fa\u672c\u64cd\u4f5c\u3002allowRequest<\/code>\u65b9\u6cd5\u7528\u4e8e\u5224\u65ad\u662f\u5426\u5141\u8bb8\u8bf7\u6c42\u7ee7\u7eed\u6267\u884c\uff0cmarkSuccess<\/code>\u65b9\u6cd5\u7528\u4e8e\u6807\u8bb0\u8bf7\u6c42\u6210\u529f\u3002<\/p>\n\n\n\n
\uff083\uff09HystrixMetrics<\/strong><\/p>\n\n\n\n
\u4f4d\u7f6e<\/strong>\uff1acom.netflix.hystrix.HystrixMetrics<\/code><\/p>\n\n\n\n
\u89e3\u8bfb<\/strong>\uff1aHystrix\u8fd8\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5ea6\u91cf\u548c\u76d1\u63a7\u529f\u80fd\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u4e86\u89e3\u7cfb\u7edf\u7684\u5065\u5eb7\u72b6\u51b5\u3002<\/p>\n\n\n\n
\uff084\uff09\u7194\u65ad\u89e6\u53d1\u673a\u5236<\/strong><\/p>\n\n\n\n
\u4f4d\u7f6e<\/strong>\uff1acom.netflix.hystrix.HystrixCommandMetrics<\/code><\/p>\n\n\n\n
public class HystrixCommandMetrics {\n    \/\/ ...\u5176\u4ed6\u5c5e\u6027\u548c\u65b9\u6cd5\n    public boolean isCircuitBreakerOpen() {\n        return circuitBreaker.isOpen();\n    }\n}<\/code><\/pre>\n\n\n\n
\u89e3\u8bfb<\/strong>\uff1aHystrix\u901a\u8fc7HystrixCommandMetrics<\/code>\u7c7b\u6765\u6536\u96c6\u547d\u4ee4\u7684\u6267\u884c\u60c5\u51b5\uff0c\u5982\u5931\u8d25\u7387\u3001\u54cd\u5e94\u65f6\u95f4\u7b49\u3002\u5f53\u5931\u8d25\u7387\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u7194\u65ad\u5668\u4f1a\u6253\u5f00\uff0c\u4e0d\u518d\u5141\u8bb8\u8bf7\u6c42\u4f20\u9012\u3002<\/p>\n\n\n\n
\uff085\uff09\u670d\u52a1\u7194\u65ad\u539f\u7406<\/strong><\/p>\n\n\n\n
Hystrix\u7684\u7194\u65ad\u539f\u7406\u57fa\u4e8e\u6ed1\u52a8\u7a97\u53e3\u7b97\u6cd5\u3002\u5b83\u4f1a\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u8bb0\u5f55\u6240\u6709\u8bf7\u6c42\u7684\u6210\u529f\u3001\u5931\u8d25\u60c5\u51b5\u3002\u5f53\u5728\u8fd9\u6bb5\u65f6\u95f4\u5185\u7684\u5931\u8d25\u7387\u8d85\u8fc7\u9608\u503c\u65f6\uff0c\u7194\u65ad\u5668\u4f1a\u6253\u5f00\uff0c\u963b\u6b62\u8fdb\u4e00\u6b65\u7684\u8bf7\u6c42\u3002\u5f53\u7194\u65ad\u5668\u6253\u5f00\u4e00\u6bb5\u65f6\u95f4\u540e\uff0c\u4f1a\u8fdb\u5165\u534a\u5f00\u72b6\u6001\uff0c\u5141\u8bb8\u90e8\u5206\u8bf7\u6c42\u901a\u8fc7\uff0c\u4ee5\u6d4b\u8bd5\u7cfb\u7edf\u662f\u5426\u5df2\u6062\u590d\u3002<\/p>\n\n\n\n
\uff086\uff09\u670d\u52a1\u7194\u65ad\u5904\u7406\u8fc7\u7a0b<\/strong><\/p>\n\n\n\n
    \n
  1. \u8bf7\u6c42\u8fdb\u5165HystrixCommand<\/code>\u3002<\/li>\n\n\n\n
  2. \u68c0\u67e5HystrixCircuitBreaker<\/code>\u662f\u5426\u6253\u5f00\u3002<\/li>\n\n\n\n
  3. \u5982\u679c\u7194\u65ad\u5668\u6253\u5f00\uff0c\u76f4\u63a5\u8fd4\u56degetFallback<\/code>\u65b9\u6cd5\u7684\u7ed3\u679c\u3002<\/li>\n\n\n\n
  4. \u5982\u679c\u7194\u65ad\u5668\u5173\u95ed\uff0c\u6267\u884crun<\/code>\u65b9\u6cd5\u3002<\/li>\n\n\n\n
  5. \u5982\u679crun<\/code>\u65b9\u6cd5\u6267\u884c\u6210\u529f\uff0c\u6807\u8bb0\u6210\u529f\u3002<\/li>\n\n\n\n
  6. \u5982\u679crun<\/code>\u65b9\u6cd5\u6267\u884c\u5931\u8d25\uff0c\u6807\u8bb0\u5931\u8d25\uff0c\u5e76\u68c0\u67e5\u5931\u8d25\u7387\u662f\u5426\u8d85\u8fc7\u9608\u503c\u3002<\/li>\n\n\n\n
  7. \u5982\u679c\u5931\u8d25\u7387\u8d85\u8fc7\u9608\u503c\uff0c\u6253\u5f00\u7194\u65ad\u5668\u3002<\/li>\n<\/ol>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u4e09\u3001\u5177\u4f53\u4f7f\u7528<\/strong><\/p>\n\n\n\n
    \u5728Spring Boot\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528application.yml<\/code>\u6216application.properties<\/code>\u6587\u4ef6\u6765\u914d\u7f6eHystrix\u7684\u7194\u65ad\u964d\u7ea7\u7b56\u7565\u3002<\/p>\n\n\n\n
    hystrix:\n  command:\n    default:\n      execution:\n        isolation:\n          thread:\n            timeoutInMilliseconds: 2000\n      circuitBreaker:\n        requestVolumeThreshold: 10\n        sleepWindowInMilliseconds: 5000\n        errorThresholdPercentage: 50<\/code><\/pre>\n\n\n\n
    \u89e3\u8bfb<\/strong>\uff1a<\/p>\n\n\n\n
      \n
    • timeoutInMilliseconds<\/code>: \u547d\u4ee4\u6267\u884c\u7684\u8d85\u65f6\u65f6\u95f4\u3002<\/li>\n\n\n\n
    • requestVolumeThreshold<\/code>: \u5728\u4e00\u4e2a\u6ed1\u52a8\u7a97\u53e3\u4e2d\uff0c\u5fc5\u987b\u8fbe\u5230\u6b64\u6570\u91cf\u7684\u8bf7\u6c42\uff0c\u624d\u53ef\u80fd\u89e6\u53d1\u7194\u65ad\u3002<\/li>\n\n\n\n
    • sleepWindowInMilliseconds<\/code>: \u7194\u65ad\u5668\u6253\u5f00\u540e\uff0c\u591a\u957f\u65f6\u95f4\u540e\u5c1d\u8bd5\u534a\u5f00\u72b6\u6001\u3002<\/li>\n\n\n\n
    • errorThresholdPercentage<\/code>: \u9519\u8bef\u7387\u8fbe\u5230\u591a\u5c11\u65f6\uff0c\u89e6\u53d1\u7194\u65ad\u3002<\/li>\n<\/ul>\n\n\n\n
      \u4e5f\u53ef\u4ee5\u4f7f\u7528@HystrixCommand<\/code>\u6ce8\u89e3\u6765\u4e3a\u65b9\u6cd5\u6dfb\u52a0\u7194\u65ad\u964d\u7ea7\u7b56\u7565\u3002<\/p>\n\n\n\n
      @Service\npublic class MyService {\n    \n    @HystrixCommand(fallbackMethod = \"fallbackMethod\")\n    public String callExternalService() {\n        \/\/ \u8c03\u7528\u5916\u90e8\u670d\u52a1\u7684\u4ee3\u7801\n    }\n\n    public String fallbackMethod() {\n        return \"\u670d\u52a1\u6682\u65f6\u4e0d\u53ef\u7528\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\";\n    }\n}<\/code><\/pre>\n\n\n\n
      \u89e3\u8bfb<\/strong>\uff1a\u5f53callExternalService<\/code>\u65b9\u6cd5\u6267\u884c\u5931\u8d25\u6216\u8d85\u65f6\u65f6\uff0c\u4f1a\u81ea\u52a8\u8c03\u7528fallbackMethod<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n
      \u56db\u3001\u9762\u8bd5\u77e5\u8bc6\u70b9<\/strong><\/p>\n\n\n\n
      \uff081\uff09<\/strong> \u4ec0\u4e48\u662f\u7194\u65ad\u673a\u5236\uff1f\u4e3a\u4ec0\u4e48\u9700\u8981\u5b83\uff1f<\/p>\n\n\n\n
      \u7b54<\/strong>\uff1a\u7194\u65ad\u673a\u5236\u662f\u4e00\u79cd\u81ea\u52a8\u963b\u6b62\u7cfb\u7edf\u6545\u969c\u6269\u6563\u7684\u65b9\u6cd5\u3002\u5f53\u67d0\u4e2a\u670d\u52a1\u51fa\u73b0\u6545\u969c\u65f6\uff0c\u7194\u65ad\u5668\u4f1a\u201c\u65ad\u5f00\u201d\uff0c\u963b\u6b62\u5bf9\u8be5\u670d\u52a1\u7684\u8fdb\u4e00\u6b65\u8bf7\u6c42\uff0c\u4ece\u800c\u9632\u6b62\u6545\u969c\u6269\u6563\u5230\u5176\u4ed6\u670d\u52a1\u3002<\/p>\n\n\n\n
      \uff082\uff09<\/strong> \u5982\u4f55\u5728Spring Boot\u4e2d\u914d\u7f6eHystrix\u7684\u7194\u65ad\u7b56\u7565\uff1f<\/p>\n\n\n\n
      \u7b54<\/strong>\uff1a\u5728Spring Boot\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528application.yml<\/code>\u6216application.properties<\/code>\u6587\u4ef6\u6765\u914d\u7f6eHystrix\u7684\u7194\u65ad\u7b56\u7565\uff0c\u5982\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u3001\u9519\u8bef\u7387\u9608\u503c\u7b49\u3002<\/p>\n\n\n\n
      \uff083\uff09<\/strong> \u5982\u4f55\u5728Spring Boot\u4e2d\u4e3a\u65b9\u6cd5\u6dfb\u52a0\u7194\u65ad\u964d\u7ea7\u7b56\u7565\uff1f<\/p>\n\n\n\n
      \u7b54<\/strong>\uff1a\u53ef\u4ee5\u4f7f\u7528@HystrixCommand<\/code>\u6ce8\u89e3\uff0c\u5e76\u6307\u5b9afallbackMethod<\/code>\u5c5e\u6027\u6765\u4e3a\u65b9\u6cd5\u6dfb\u52a0\u7194\u65ad\u964d\u7ea7\u7b56\u7565\u3002<\/p>\n\n\n\n
      \uff084\uff09<\/strong> Hystrix\u548cResilience4j\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/p>\n\n\n\n
      \u7b54<\/strong>\uff1aHystrix\u548cResilience4j\u90fd\u662f\u7194\u65ad\u5e93\uff0c\u4f46Resilience4j\u662f\u4e13\u4e3aJava 8\u548c\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bbe\u8ba1\u7684\uff0c\u800cHystrix\u66f4\u6ce8\u91cd\u4f20\u7edf\u7684\u547d\u4ee4\u6a21\u5f0f\u3002<\/p>\n\n\n\n
      \uff085\uff09<\/strong> \u4ec0\u4e48\u662f\u964d\u7ea7\u7b56\u7565\uff1f\u8bf7\u7ed9\u51fa\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n\n\n\n
      \u7b54<\/strong>\uff1a\u964d\u7ea7\u7b56\u7565\u662f\u5728\u670d\u52a1\u51fa\u73b0\u6545\u969c\u65f6\u91c7\u53d6\u7684\u5907\u9009\u65b9\u6848\u3002\u4f8b\u5982\uff0c\u5f53\u63a8\u8350\u670d\u52a1\u4e0d\u53ef\u7528\u65f6\uff0c\u53ef\u4ee5\u8fd4\u56de\u9ed8\u8ba4\u7684\u63a8\u8350\u5217\u8868\u4f5c\u4e3a\u964d\u7ea7\u7b56\u7565\u3002<\/p>\n\n\n\n
      \u603b\u7ed3<\/strong><\/p>\n\n\n\n
      \u7194\u65ad\u548c\u964d\u7ea7\u662f\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\u7684\u5173\u952e\u673a\u5236\uff0c\u5b83\u4eec\u5e2e\u52a9\u7cfb\u7edf\u5728\u9762\u5bf9\u6545\u969c\u65f6\u4fdd\u6301\u9ad8\u53ef\u7528\u6027\u3002Spring Boot\u7ed3\u5408Spring Cloud\u63d0\u4f9b\u4e86Hystrix\u4f5c\u4e3a\u7194\u65ad\u964d\u7ea7\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u6784\u5efa\u66f4\u52a0\u5065\u58ee\u7684\u5fae\u670d\u52a1\u7cfb\u7edf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u4e00\u3001\u4ecb\u7ecd \u7194\u65ad\u964d\u7ea7\u662f\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\u7684\u5173\u952e\u673a\u5236\uff0c\u7528\u4e8e\u786e\u4fdd\u7cfb\u7edf\u5728\u9762\u5bf9\u6545\u969c\u65f6\u4fdd\u6301\u9ad8\u53ef\u7528\u6027\u3002Spring Boot\u901a\u8fc7\u6574 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118,59],"tags":[29,30,26,16],"class_list":["post-475","post","type-post","status-publish","format-standard","hentry","category-118","category-59","tag-springcloud","tag-30","tag-26","tag-java"],"yoast_head":"\nSpringCloud\u7684\u5fae\u670d\u52a1 \u7194\u65ad\u964d\u7ea7<\/title>\n<meta name=\"description\" content=\"\u7194\u65ad\u548c\u964d\u7ea7\u662f\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\u7684\u5173\u952e\u673a\u5236\uff0c\u5b83\u4eec\u5e2e\u52a9\u7cfb\u7edf\u5728\u9762\u5bf9\u6545\u969c\u65f6\u4fdd\u6301\u9ad8\u53ef\u7528\u6027\u3002Spring Boot\u7ed3\u5408Spring Cloud\u63d0\u4f9b\u4e86Hystrix\u4f5c\u4e3a\u7194\u65ad\u964d\u7ea7\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u6784\u5efa\u66f4\u52a0\u5065\u58ee\u7684\u5fae\u670d\u52a1\u7cfb\u7edf\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.talktop.cn\/?p=475\" \/>\n<script type=\"application\/ld+json\" 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