sentinel实现对openfeign保护

yicj2023-09-16 11:55

引入依赖

xml 复制代码

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

yml添加配置
yaml 复制代码
```
feign:
  sentinel:
    enabled: true
```

编写feign接口并配置fallback属性

java 复制代码

@FeignClient(value = "nacos-client-app"
        , contextId = "nacosHelloClient"
        , fallback = NacosHelloClientFallback.class
)
public interface NacosHelloClient {

    @GetMapping("/hello/index")
    String hello() ;

    @GetMapping("/hello/exception")
    String exception() ;
}

编写fallback实现代码

java 复制代码

@Component
public class NacosHelloClientFallback implements NacosHelloClient {

    @Override
    public String hello() {
        return "fallback hello ret value";
    }
    @Override
    public String exception() {
        return "fallback exception ret value";
    }
}