【SpringCloud学习】Spring Cloud Gateway熔断器使用(Greenwich版)

本文需要的demo：

服务Provider：ClientA

服务Consumer：Feign

网关：Gateway

maven需要添加：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>

具体重试代码：

spring:
  cloud:
    gateway:
      discovery:
        locator:
          enabled: true
      routes:
        - id: hystrix_route
          uri: lb://spring-cloud-feign
          predicates:
            - Path=/hello/**
          filters:
            - StripPrefix=0
            - name: Hystrix
              args:
                name: fallbackcmd
                fallbackUri: forward:/fallback
# 超时熔断 设置为5s 如果请求在5s内还没有响应直接进入熔断逻辑
hystrix.command.fallbackcmd.execution.isolation.thread.timeoutInMilliseconds: 5000

fallbackUri: forward:/fallback会跳转到gateway的接口fallback

熔断的代码：

@RestController
public class HystrixController {

    @GetMapping("/fallback")
    public Map<String,Object> fallback() {
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("Code",200);
        map.put("Message","请稍后再试");
        return map;
    }

}

访问：http://localhost:8007/hello/ciwei在feign打个断点5s后会自动熔断的