OpenFeign整合Sentinel

客官°小女子只卖身不卖艺 2021-07-25 02:11 830阅读 0赞

# 一 引入sentinel的依赖 #

<dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    </dependency>

# 二 开启sentinel支持 #

在service\_edu的yml配置文件中开启Feign对Sentinel的支持

feign:
      sentinel:
        enabled: true

# 三 创建容错类 #

@Service
    @Slf4j
    public class OssFileServiceFallBack implements OssFileService {
        /**
         * 功能描述：服务降级方法
         *
         * @author cakin
         * @date 2020/11/29
         * @return R 返回给前端的数据
         */
        @Override
        public R test() {
            return R.error();
        }
    
        /**
         * 功能描述：删除图像服务降级方法
         *
         * @author cakin
         * @date 2020/11/29
         * @param url 图像的ulr地址
         * @return R 返回给前端的数据
         */
        @Override
        public R removeFile(String url) {
            log.info("熔断保护");
            return R.error();
        }
    }

# 四 指定容错类 #

为OpenFeign远程调用接口添加fallback属性值指定容错类

@Service
    @FeignClient(value = "service-oss", fallback = OssFileServiceFallBack.class)
    public interface OssFileService {

# 五 测试 #

## 1 停oss服务 ##

## 2 删除讲师 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

日志打印：

2020-11-29 18:57:50 |INFO  |http-nio-8110-exec-7 |DynamicServerListLoadBalancer.java:150 |com.netflix.loadbalancer.DynamicServerListLoadBalancer |DynamicServerListLoadBalancer for client service-oss initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=service-oss,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:com.alibaba.cloud.nacos.ribbon.NacosServerList@1cc70ac3
    2020-11-29 18:57:50 |INFO  |http-nio-8110-exec-7 |OssFileServiceFallBack.java:23 |com.atguigu.guli.service.edu.feign.fallback.OssFileServiceFallBack |熔断保护

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