Feign整合sentinel实现fallbackFactory容错降级

通过整合sentinel实现Feign调用服务，当调用出错后实现容错降级。
1、引入pom

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

2、配置yaml

# feign启用sentinel
feign:
  sentinel:
	enabled: true

2、创建Fallback容错类

@Component
public class TestServiceFallbackFactory implements FallbackFactory<TestFeign> {

    @Override
    public WageServiceFeign create(Throwable throwable) {
        // 可以将异常继续抛出，也可以实现自定义的内容
        throw new RuntimeException(throwable.getMessage());
    }
}

修改@FeignClient

//加入fallbackFactory指向容错类
@FeignClient(value = "b-service",fallbackFactory = TestServiceFallbackFactory .class))
public interface TestFeign {
   ....
}