feign整合sential,Sentinel-结合Feign(五)

1. 添加依赖: sentinel，feign

2. 配置feign允许sentinel

3. 编写: feign，请求客户端

4. 为客户端添加(sentinel)异常处理类

1.添加依赖: sentinel，feign

org.springframework.cloud

spring-cloud-starter-openfeign

org.springframework.cloud

spring-cloud-starter-alibaba-sentinel

2.配置feign允许sentinel

feign:

sentinel:

enabled: true

3.编写: feign，请求客户端

@FeignClient(name = "user-center")

public interface UserCenterFeignClient {

public ApiResult findBy(Integer id);

public ApiResult getDetail(User user);

}

4.为客户端添加(sentinel)异常处理类

方式(1).

// 用户中心 Feign 接口

@FeignClient(name = "user-center",fallback = FeignClientFallback.class)

public interface UserCenterFeignClient {

public ApiResult findBy(Integer id);

public ApiResult getDetail(User user);

}

// 用户中心 Feign异常接收处理类

@Component

public class UserCenterFeignClientFallback implements UserCenterFeignClient {

@Override

public ApiResult findBy(Integer id) {

return ApiResult.error("异常");

}

@Override

public ApiResult getDetail(User users) {

return ApiResult.error("异常");

}

}

方式(2).

// 接口

@FeignClient(name = "user-center",fallbackFactory = FeignClientFallback.class) // 方法上可以拿到异常

public interface UserCenterFeignClient {

public ApiResult findBy(Integer id);

public ApiResult getDetail(User user);

}

// 异常处理类

@Component

@Slf4j

public class UserCenterFeignClientFallbackFactory implements FallbackFactory {

// 用户中心 Feign异常接收处理类

@Override

public UserCenterFeignClient create(Throwable throwable) {

return new UserCenterFeignClient() {

@Override

public ApiResult findBy(Integer id) {

log.warn("异常",throwable);

return ApiResult.error("Sentinel 异常");

}

@Override

public ApiResult getDetail(User users) {

return ApiResult.error("Sentinel 异常");

}

};

}

}

原文：https://blog.51cto.com/3168834/2452003