springcloud hystrix 实现服务降级解决服务器雪崩

导入依赖

			org.springframework.cloud
			spring-cloud-starter-feign
		
		 
		
			org.springframework.cloud
			spring-cloud-starter-hystrix
		

 

使用fallback进行降级

 

@FeignClient(value="service-member",fallback=FallBack.class)
public interface MemberService {
	
	@RequestMapping("/getMember")
	public String getMember(); 
	
}

@Component
public class FallBack implements MemberService{

	@Override
	public String getMember() {
		// TODO Auto-generated method stub
		return "服务器发生异常。。。";
	}

}
 

 

使用jmeter给项目做压力测试，模拟服务器雪崩

application.yml配置

eureka:
  client:
    service-url:
      defaultZone: http://localhost:8080/eureka/
server:  
  port: 8777
spring:
  application:
    name: order-fgin
feign:
    hystrix:
      enabled: true
hystrix:
    command:
      default:
        execution:
          iolation:
            thread:
              timeoutInMilliseconds: 4000

注意要给添加响应时间的配置，若在该时间内未能相应请求，就会做降级处理