SpringCloud复习：（6）feign整合hystrix

一、添加依赖

        
            org.springframework.cloud
            spring-cloud-starter-netflix-hystrix
            2.2.5.RELEASE
        

二、配置文件开启feign对hystrix的支持：

feign:
  hystrix:
    enabled: true

三、启动类添加注解@EnableHystrix
四、编写@FeignClient接口

package cn.edu.tju.service;

import cn.edu.tju.component.FeignDemoServiceFallback;
import cn.edu.tju.config.MyConfig2;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(value = "EUREKA-SERVICE-PROVIDER" /*, configuration = MyConfig2.class*/ , fallback = FeignDemoServiceFallback.class)
public interface FeignDemoService {
    @RequestMapping("/hello")
    String helloWorld();
}

五、编写接口对应的降级实现类：

package cn.edu.tju.component;

import cn.edu.tju.service.FeignDemoService;
import org.springframework.stereotype.Component;

@Component
public class FeignDemoServiceFallback implements FeignDemoService {
    @Override
    public String helloWorld() {
        return "my fallback......";
    }
}