Cycle dependency 문제 (Gateway, FeignClient)

[progress0407]

상황

Spring Cloud Gateway에서 FeignClient 적용할때,
앱 실행시 순환 의존으로 실행이 안 되는 문제 발생

The dependencies of some of the beans in the application context form a cycle:

   routeConfig defined in file [C:\dev\5. projects\1. jvm\0. toy\E-Commerce-with-MSA-and-DDD\api-gateway\build\classes\kotlin\main\io\philo\shop\config\RouteConfig.class]
┌─────┐
|  authorizationInceptionFilter defined in file [C:\dev\5. projects\1. jvm\0. toy\E-Commerce-with-MSA-and-DDD\api-gateway\build\classes\kotlin\main\io\philo\shop\filter\AuthorizationInceptionFilter.class]
↑     ↓
|  userRestClientFacade defined in file [C:\dev\5. projects\1. jvm\0. toy\E-Commerce-with-MSA-and-DDD\common\rest-client\build\classes\kotlin\main\io\philo\shop\user\UserRestClientFacade.class]
↑     ↓
|  io.philo.shop.user.UserFeignClient
↑     ↓
|  corsGatewayFilterApplicationListener defined in class path resource [org/springframework/cloud/gateway/config/GatewayAutoConfiguration.class]
↑     ↓
|  routePredicateHandlerMapping defined in class path resource [org/springframework/cloud/gateway/config/GatewayAutoConfiguration.class]
↑     ↓
|  filteringWebHandler defined in class path resource [org/springframework/cloud/gateway/config/GatewayAutoConfiguration.class]

해결 방법

@Lazy 어노테이션 추가

@Component
class AuthorizationInceptionFilter(@Lazy private val userRestClient: UserRestClientFacade) : GlobalFilter, Ordered { ... }

참고

• https://stackoverflow.com/questions/75096788/feign-client-with-spring-cloud-gatewayfilter-cause-cycle-dependency
• Feign Client with Spring Security cause cycle dependency spring-cloud/spring-cloud-openfeign#142