인프런 커뮤니티 질문&답변

[질문 템플릿]
1. 강의 내용과 관련된 질문인가요? (예/아니오) 예
2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오) 예
3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)

[질문 내용]
안녕하세요? 컴포넌트 스캔에 대한 강의를 듣던 중 궁금해서 테스트를 해보던 중에 이해가 안가는 부분이 있어서 질문을 드립니다.

@Configuration
@ComponentScan
public class AutoAppConfig {
}

강의에서 excludeFilters 설정한 것을 빼고 디폴트 @ComponentScan 을 적용해서 테스트를 해봤습니다.

...

if(beanDefinition.getRole() == BeanDefinition.ROLE_APPLICATION) {
System.out.println("beanDefinitionName = " + beanDefinitionName + " value = " + beanDefinition);
}

바로 위와 같이 전에 테스트했던 코드를 참고해서 내용을 찍어봤는데...

beanDefinitionName = autoAppConfig value = Generic bean: class [hello.core.AutoAppConfig$$SpringCGLIB$$0]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null

beanDefinitionName = applicationContextExtendsFindTest.TestConfig value = Generic bean: class [hello.core.beanfind.ApplicationContextExtendsFindTest$TestConfig$$SpringCGLIB$$0]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null; defined in file [D:\400.Projects\01.SpringCore\core\out\test\classes\hello\core\beanfind\ApplicationContextExtendsFindTest$TestConfig.class]

beanDefinitionName = applicationContextSameBeanFindTest.SameBeanConfig value = Generic bean: class [hello.core.beanfind.ApplicationContextSameBeanFindTest$SameBeanConfig$$SpringCGLIB$$0]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null; defined in file [D:\400.Projects\01.SpringCore\core\out\test\classes\hello\core\beanfind\ApplicationContextSameBeanFindTest$SameBeanConfig.class]

beanDefinitionName = statefulServiceTest.TestConfig value = Generic bean: class [hello.core.singleton.StatefulServiceTest$TestConfig$$SpringCGLIB$$0]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null; defined in file [D:\400.Projects\01.SpringCore\core\out\test\classes\hello\core\singleton\StatefulServiceTest$TestConfig.class]

beanDefinitionName = appConfig value = Generic bean: class [hello.core.AppConfig$$SpringCGLIB$$0]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null; defined in file [D:\400.Projects\01.SpringCore\core\out\production\classes\hello\core\AppConfig.class]

beanDefinitionName = coreApplication value = Generic bean: class [hello.core.CoreApplication$$SpringCGLIB$$0]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodNames=null; destroyMethodNames=null; defined in file [D:\400.Projects\01.SpringCore\core\out\production\classes\hello\core\CoreApplication.class]

beanDefinitionName = rateDiscountPolicy value = Root bean: class [null]; scope=; abstract=false; lazyInit=null; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=applicationContextExtendsFindTest.TestConfig; factoryMethodName=rateDiscountPolicy; initMethodNames=null; destroyMethodNames=[(inferred)]; defined in class path resource [hello/core/beanfind/ApplicationContextExtendsFindTest$TestConfig.class]

...

위와 같이 root 패키지 내의 모든 빈이 등록되는 것 같았습니다. 예상으로는 @Component, @Configuration 이 붙어 있는 빈들만 등록될 줄 알았는데 왜 이렇게 나오는 걸까요?