openfeign3 + hystrix 熔断降级

1. maven 依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
    <version>3.1.3</version>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    <version>2.2.10.RELEASE</version>
</dependency>

2. 配置

feign:
  # openfeign3 配置更改 低版本是hystrix
  circuitbreaker:
    enabled: true
  client:
    config:
      default:
        readTimeout: 500
        connectTimeout: 500
hystrix:
  command:
    default:
      execution:
        isolation:
          thread:
            timeoutInMilliseconds: 500

3. 代码

@FeignClient(name = "juejin-server", contextId = "juejinClient",  fallbackFactory = JuejinClientHystrix.class)
public interface JuejinClient {
     @PostMapping("selectArticleList")
     List<JuejinDto> selectArticleList(@RequestBody JuejinRequest request);
}

// 注意FallbackFactory 是org.springframework.cloud.openfeign.FallbackFactory

@Component
public class JuejinClientHystrix implements FallbackFactory<JuejinClient>  {

    @Override
    public JuejinClient create(Throwable throwable) {
        return new JuejinClient() {
             @Override
            public  List<JuejinDto> selectArticleList(JuejinRequest request) {
                return Collections.emptyList();
            }
        };
    }
}