Feign如何整合Sentinel?
时间: 2024-05-17 14:17:59 浏览: 5
Feign整合Sentinel可以通过以下步骤进行:
1. 引入依赖
在项目中引入以下依赖:
```xml
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>
```
2. 配置Feign
在Feign的配置类中加入以下配置:
```java
@Configuration
public class FeignConfig {
@Autowired
private ObjectFactory<HttpMessageConverters> messageConverters;
@Bean
public SentinelFeign.Builder sentinelFeignBuilder() {
return SentinelFeign.builder().messageConverters(messageConverters);
}
}
```
3. 定义Feign接口
定义Feign接口时,在方法上加入`@SentinelResource`注解,如下所示:
```java
@FeignClient(name = "service-provider", fallback = ServiceProviderFallback.class, configuration = FeignConfig.class)
public interface ServiceProviderFeignClient {
@GetMapping("/hello")
@SentinelResource(value = "hello", fallback = "fallback")
String hello();
}
```
4. 配置Sentinel
在Sentinel dashboard中配置相应的规则,如下所示:
![sentinel_feign_rule](https://cdn.jsdelivr.net/gh/zhangymPerson/blog_img/20211129105406.png)
这样,Feign就可以和Sentinel整合起来了。当请求达到限流阈值时,Sentinel将会进行限流处理,同时可以使用自定义的降级处理方法。