跟我学Spring Cloud（Finchley版）-14-Feign使用Hystrix

feign:
  hystrix:
    enabled: true

@FeignClient(name = "microservice-provider-user", fallback = UserFeignClientFallback.class)
public interface UserFeignClient {
  @GetMapping("/users/{id}")
  User findById(@PathVariable("id") Long id);
}

@Component
class UserFeignClientFallback implements UserFeignClient {
  @Override
  public User findById(Long id) {
    return new User(id, "默认用户", "默认用户", 0, new BigDecimal(1));
  }
}

@FeignClient(name = "microservice-provider-user", fallbackFactory = UserFeignClientFallbackFactory.class)
public interface UserFeignClient {
  @GetMapping("/users/{id}")
  User findById(@PathVariable("id") Long id);
}

@Component
@Slf4j
class UserFeignClientFallbackFactory implements FallbackFactory<UserFeignClient> {
  @Override
  public UserFeignClient create(Throwable throwable) {
    return new UserFeignClient() {
      @Override
      public User findById(Long id) {
        log.error("进入回退逻辑", throwable);
        return new User(id, "默认用户", "默认用户", 0, new BigDecimal(1));
      }
    };
  }
}

feign.hystrix.enabled: true

feign.hystrix.enabled: false

public class FeignDisableHystrixConfiguration {
    @Bean
    @Scope("prototype")
    public HystrixFeign.Builder feignBuilder() {
        return HystrixFeign.builder();
    }
}

public class FeignDisableHystrixConfiguration {
    @Bean
    @Scope("prototype")
    public Feign.Builder feignBuilder() {
        return Feign.builder();
    }
}