熔断器使用步骤

09 springcloud的熔断器.png

一、添加依赖

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </dependency>

        <!--hystrix依赖，主要是用  @HystrixCommand -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>

二、创建实现类,在发生熔断之后进行什么操作

public class VodClientFeginImpl implements VodClient{
    @Override
    public R deleteVideoById(String id) {
        return R.error().message("删除视频失败");
    }

    @Override
    public R deleteVideoes(List<String> videoList) {
        return R.error().message("批量删除视频失败");
    }
}

三、在interface上添加注解和属性

@FeignClient(name = "service-vod",fallback = VodClientFeginImpl.class)//调用服务的名称
@Component
public interface VodClient {

    //PathVariable注解一定要指定参数名称,否则出错
    @DeleteMapping("/eduvod/vod/deleteVideo/{id}")//必须是全路径
    public R deleteVideoById(@PathVariable("id") String id);
    //删除多个视频的方法
    @DeleteMapping("/eduvod/vod/delete-batch")
    public R deleteVideoes(@RequestParam("videoList") List<String> videoList);
}