AppConfig의 @Bean 메서드의 이름을 아무렇게나 지으면 안되나요?
미해결
스프링 핵심 원리 - 기본편
@Configuration public class AppConfig { @Bean public MemoryMemberRepository memoryRepository() { return new MemoryMemberRepository(); } @Bean public RateDiscountPolicy discountPolicy() { return new RateDiscountPolicy(); } @Bean public MemberService memberService(){ return new MemberServiceImpl(memoryRepository()); } @Bean public OrderService orderService(){ // return null; return new OrderServiceImpl(memoryRepository(), discountPolicy()); } } 저는 지금까지 위의 코드처럼 MemoryMemberRepository 빈 객체를 생성하는 메서드의 이름을 memberRepository 가 아니라 memoryRepository 로 이름지어주고 진행해왔습니다. 그러다가 7.의존관계 자동 주입 챕터에서 test 폴더를 전부 테스트할 때 CoreApplicationTests에서 동일한 타입에 여러 Bean이 생성되었다는 오류 메시지를 받았습니다. Parameter 0 of constructor in hello.core.member.MemberServiceImpl required a single bean, but 2 were found: - memoryMemberRepository: defined in file [C:\Users\***\***\coding\source_code\Spring\inflearn2\out\production\classes\hello\core\member\MemoryMemberRepository.class] - memoryRepository: defined by method 'memoryRepository' in class path resource [hello/core/AppConfig.class] /// Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'hello.core.member.MemberRepository' available: expected single matching bean but found 2: memoryMemberRepository,memoryRepository 해결하려는 과정에서 강의노트에 메서드 이름이 memberRepository 였다는걸 알게됐고 이걸로 이름을 고쳐주고 다시 테스트하니까 정상적으로 테스트가 완료됐습니다. 메서드 이름만 바꿔준 것만으로 NoUniqueBean 오류가 해결된 이유가 궁금해졌습니다. 이것저것 코드를 건드렸는데 @Component 코드들을 아래에 붙이겠습니다. 감사합니다. @Component public class MemberServiceImpl implements MemberService{ private MemberRepository store; @Autowired public MemberServiceImpl(MemberRepository memberRepository){ this.store = memberRepository; } @Override public void register(Member newMember) { store.save(newMember); } @Override public Member search(Long memberId) { return store.findById(memberId); } } @Component public class MemoryMemberRepository implements MemberRepository{ private static Map<Long, Member> store = new HashMap<>(); @Override public void save(Member member) { store.put(member.getId(), member); } @Override public Member findById(Long memberId) { return store.get(memberId); } } @Component public class OrderServiceImpl implements OrderService { private MemberRepository memberRepository; private DiscountPolicy discountPolicy; @Autowired public OrderServiceImpl(MemberRepository memberRepository, DiscountPolicy discountPolicy) { System.out.println("Constructor DI"); this.memberRepository = memberRepository; this.discountPolicy = discountPolicy; } @Override public Order createOrder(Long memberId, String itemName, int itemPrice) { Member member = memberRepository.findById(memberId); int discountPrice = discountPolicy.discount(member, itemPrice); return new Order(memberId, itemName, itemPrice, discountPrice); } } @Component public class RateDiscountPolicy implements DiscountPolicy{ private static final double DISCOUNT_RATE = 0.1; @Override public int discount(Member member, int price) { if(member.getGrade() == Grade.VIP) return (int) (price * DISCOUNT_RATE); else return 0; } }
- spring
- AppConfig
- nouniquebean