8.Hystrix-Feign配置服务降级

项目中用到Feign调用服务端方法并做服务降级处理

1.application.properties配置：

feign.hystrix.enabled=true

2.pom:

<!--feign-->
<dependency>
　　<groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<!--hystrix-->
<dependency>
　　<groupId>org.springframework.cloud</groupId>
　　<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>
<!--eureka-client-->
<dependency>
　　<groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>

3.客户端调message-server服务的sendMessage方法时：

package com.odao.consumer.service.message;

import com.odao.consumer.entity.MessageEntity;
import com.odao.consumer.service.message.impl.MessageServiceImpl;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@FeignClient(value = "message-server",fallback = MessageServiceImpl.class)
public interface MessageService {

    @RequestMapping(value = "sendMessage",method = RequestMethod.POST)
    String sendMessage(MessageEntity messageEntity);

}

4.MessageServiceImpl:

package com.odao.consumer.service.message.impl;

import com.odao.consumer.entity.MessageEntity;
import com.odao.consumer.service.message.MessageService;
import com.odao.plat.response.OResponse;
import com.odao.plat.response.RespStatus;
import org.springframework.stereotype.Service;

@Service
public class MessageServiceImpl implements MessageService {

    @Override
    public String sendMessage(MessageEntity messageEntity) {
        return "服务器开小差啦";
    }

}