SpringCloud分布式项目下feign的使用示例详解

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>

@FeignClient(value = "leadnews-article")
public interface IArticleClient {
    @PostMapping("/api/v1/article/save")
    public ResponseResult saveArticle(@RequestBody ArticleDto dto) ;
}

@RestController
public class ArticleClient implements IArticleClient {
    @Autowired
    private ApArticleService apArticleService;
    @Override
    @PostMapping("/api/v1/article/save")
    public ResponseResult saveArticle(@RequestBody ArticleDto dto) {
        return apArticleService.saveArticle(dto);
    }
}

@Autowired
    private IArticleClient articleClient;

 
/**
 * feign失败配置
 * @author itheima
 */
@Component
public class IArticleClientFallback implements IArticleClient {
    @Override
    public ResponseResult saveArticle(ArticleDto dto)  {
        return ResponseResult.errorResult(AppHttpCodeEnum.SERVER_ERROR,"获取数据失败");
    }
}

@Configuration
@ComponentScan("com.heima.apis.article.fallback")
public class InitConfig {
}

feign:
  # 开启feign对hystrix熔断降级的支持
  hystrix:
    enabled: true
  # 修改调用超时时间
  client:
    config:
      default:
        connectTimeout: 2000
        readTimeout: 2000