인프런 커뮤니티 질문&답변

안녕하세요. 백엔드님^^

AppConfig 코드를 잘 보셔야 합니다.

return new MemberServiceImpl(new MemoryMemberRepository());

-> return new MemberServiceImpl(memberRepository());

다른 코드도 모두 메서드 호출로 변경해주세요.

감사합니다.

아래는 테스트코드고

public class ConfigurationSingletonTest {

    @Test
    void configurationTest() {
        ApplicationContext ac = new AnnotationConfigApplicationContext(AppConfig.class);

        MemberServiceImpl memberService = ac.getBean("memberService", MemberServiceImpl.class);
        OrderServiceImpl orderService = ac.getBean("orderService", OrderServiceImpl.class);
        MemberRepository memberRepository = ac.getBean("memberRepository", MemberRepository.class);

        MemberRepository memberRepository1 = memberService.getMemberRepository();
        MemberRepository memberRepository2 = orderService.getMemberRepository();

        System.out.println("memberService -> memberRepository = "+ memberRepository1);
        System.out.println("orderService -> memberRepositiory = "+ memberRepository2);
        System.out.println("memberRepository = "+memberRepository);

        Assertions.assertThat(memberService.getMemberRepository()).isSameAs(memberRepository);
        Assertions.assertThat(orderService.getMemberRepository()).isSameAs(memberRepository);

    }
}

아래는 AppConfig 코드입니다..

@Configuration
public class AppConfig {

    @Bean
    public MemberService memberService() {
        System.out.println("call AppConfig.memberService");
        return new MemberServiceImpl(new MemoryMemberRepository());
    }

    @Bean
    public MemberRepository memberRepository() {
        System.out.println("call AppConfig.memberRepository");
        return new MemoryMemberRepository();
    }

    @Bean
    public OrderService orderService() {
        System.out.println("call AppConfig.orderService");
        return new OrderServiceImpl(new MemoryMemberRepository(), new RateDiscountpolicy());
    }

    @Bean
    public DiscountPolicy discountPolicy() {

        return new RateDiscountpolicy();
    }
}