Hystrix 服务容错

第一步:

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<dependency>     <groupId>org.springframework.cloud</groupId>     <artifactId>spring-cloud-config-client</artifactId> </dependency>

 第二步:

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1	@EnableCircuitBreaker

 第三步:

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package com.example.order.controller;   import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties; import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate;   /**  * @Title: HystrixController  * @ProjectName order  * @date 2019/12/1911:34  */ @RestController @DefaultProperties(defaultFallback = "defaultFallback") // 默认调用的方法名 public class HystrixController {     // 超时配置     @HystrixCommand//(commandProperties = {@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")})     @GetMapping("/getProductInfoList")     public String getProductInfoList() {         RestTemplate restTemplate = new RestTemplate();         return restTemplate.postForObject("http://127.0.0.1:8080/product/list",                 null,                 String.class); //      throw new RuntimeException("发送异常了");     }       /**      * 默认方法名, 如果8080服务不通,会调用      * @return      */     private String defaultFallback() {         return "默认提示：太拥挤了, 请稍后再试~~";     } }

　　

yml 配置方式(方法不需要单独配置)

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hystrix:   command:     # 配置超时时间     default:       execution:         isolation:           thread:             timeoutInMilliseconds: 1000     getProductInfoList: # 给方法名称单独添加超时时间       execution:         isolation:           thread:             timeoutInMilliseconds: 3000

　　

feign 中直接使用 hystrix 添加配置

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feign:   hystrix:     enabled: true

 在@FeignClient(name="xxx", fallback=类名.class)  该类需要实现当前接口client类的所有方法