springcloud(9)-断路器

1.pom.xml 增加断路器相关包

<!--断路器-->
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>

2.ProductClientFeign注解修改

由原来的

@FeignClient(value = "PRODUCT-DATA-SERVICE")

变为

@FeignClient(value = "PRODUCT-DATA-SERVICE",fallback = ProductClientFeignHystrix.class)

3.增加ProductClientFeignHystrix.class

@Component
public class ProductClientFeignHystrix implements ProductClientFeign{
    public List<Product> listProdcuts(){
        List<Product> result = new ArrayList<>();
        result.add(new Product(0,"产品数据微服务不可用",0));
        return result;
    }

}

4.修改配置文件application.yml,增加如下：

feign.hystrix.enabled: true

5.测试：http://localhost:8012/products