spring cloud: Hystrix(四):feign类似于hystrix的断容器功能

spring cloud: Hystrix(四):feign使用hystrix

@FeignClient支持回退的概念:fallback方法,这里有点类似于:@HystrixCommand(fallbackMethod = "notfindback")的fallbackMethod 方法。

fallback方法调用的是一个类.,feign也有:/health, /health.stream地址信息

http://192.168.1.4:7601/health

1.首先要在配置件开启hystrix配置

#feign.hystrix
feign.hystrix.enabled=true

  

或者

feign:
  hystrix:
    enabled: true

  

2.在FeignClient客户端文件添加fallback

@FeignClient(name="spring-boot-user", fallback=HystrixClientFallback.class)
public interface UserFeignClient {

	// 两个坑:1. @GetMapping不支持   2. @PathVariable得设置value
	@RequestMapping(value="/simple/{id}", method=RequestMethod.GET)
	public User findById(@PathVariable("id") Long id);
	

}

  

3.HystrixClientFallback友好文件(当feignClient地址不通是,默认返回本类信息)

@Component
public class HystrixClientFallback  implements UserFeignClient{

	@Override
	public User findById(Long id) {
		// TODO Auto-generated method stub
		User user = new User();
		user.setId(0L);
		return user;
	}

}

  

4.controller调用

@RestController
public class MovieController {

	@Autowired
	private UserFeignClient userFeignClient;
	
	@GetMapping("/movie/{id}")
	public User findById(@PathVariable("id") Long id) {
		return this.userFeignClient.findById(id);
	}
	
	
}

  

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转载自www.cnblogs.com/achengmu/p/9846464.html
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