openfeign整合sentinel进行降级

pom.xml

<!--nacos-服务注册发现-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!--添加openfeign依赖-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<!--snetinel依赖-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

yml配置

#对feign的支持
feign:
  sentinel:
    enabled: true  #添加feign对sentinel的支持

ProductFeignService （作用是当远程调用服务product-service发生异常的时候会执行ProductFeignFallBackService 的 get方法）

@FeignClient(value = "product-service", path = "/product", fallback = ProductFeignFallBackService.class)
public interface ProductFeignService {

    @RequestMapping("/{id}")
    public String get(@PathVariable Integer id);

}

ProductFeignFallBackService

/**
 * @Description:
 * @Author: xu
 * @Data: 2024-2024/4/22-22
 * @Version: V1.0
 */
public class ProductFeignFallBackService implements ProductFeignService {

    @Override
    public String get(Integer id) {
        return "进入降级";
    }
}