<2>Springcloud中使用Hystrix注解方式实现服务降级、熔断、隔离

<!-- hystrix断路器 -->
  <dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
  </dependency>
在order-service-impl 项目的配置文件中添加开启Hystrix
feign:
  hystrix:
    enabled: true
在项目的OrderServiceImpl类中添加三个方法测试
package com.vhukze.order;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.vhukze.api.entity.UserEntity;
@RestController
public class OrderServiceImpl implements IOrderService{
  @Autowired
  private MemberServiceFeign feign;
  @RequestMapping("toMember")
  public String toMember(String name) {
  // TODO Auto-generated method stub
  System.out.println("当前线程名称："+Thread.currentThread().getName());
  UserEntity user = feign.getMember(name);
  return user.toString();
  }
  @RequestMapping("toMemberHystrix")
  @HystrixCommand(fallbackMethod="fallbackMethod")
//此注解默认开启服务熔断、服务降级（指定降级使用的方法名称）、线程池隔离
  public String toMemberHystrix(String name) {
  // TODO Auto-generated method stub
  System.out.println("当前线程名称："+Thread.currentThread().getName());
  UserEntity user = feign.getMember(name);
  return user.toString();
  }
  public String fallbackMethod(String data) {
  return "服务降级，稍后重试";
  }
}

#### hystrix禁止服务超时时间
hystrix:  
 command: 
   default: 
      execution: 
       timeout: 
        enabled: false