@Autowired 필드 명, @Qualifier, @Primar... - 인프런

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@Autowired 필드 명, @Qualifier, @Primary 강의중 질문드립니다.

해결된 질문

작성

236

안녕하세요.

강의를 들으면서 라이브 코딩을 하며 오류가 계속 발생해 문의드립니다.

@Component
public class OrderServiceImpl implements OrderService {

    private final MemberRepository memberRepository;
    private final DiscountPolicy discountPolicy;

    @Autowired
    public OrderServiceImpl(MemberRepository memberRepository,DiscountPolicy discountPolicy) {
        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);
    }

    //테스트 용도
    public MemberRepository getMemberRepository() {
        return memberRepository;
        }
    }

@Component
@Primary
public class RateDiscountPolicy implements DiscountPolicy {

    private int discountPercent = 10;

    @Override
    public int discount(Member member, int price) {
        if (member.getGrade() == Grade.VIP) {
            return price * discountPercent / 100;
        } else {
            return 0;
        }
    }
}

@Component
public class FixDiscountPolicy implements DiscountPolicy {

    private int discountFixAmount = 1000; //1000원 할인

    @Override
    public int discount(Member member, int price) {
        if (member.getGrade() == Grade.VIP) {
            return discountFixAmount;
        } else {
            return 0;
        }
    }
}

이렇게 작성이 되어있지만 AutoConfigTest에서 NoSuchBeanDefinitionException 가 발생해 문의드립니다.

public class AutoAppConfigTest {

    @Test
    void basicScan() {
        ApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class);

        MemberService memberService = ac.getBean(MemberService.class);
        assertThat(memberService).isInstanceOf(MemberService.class);

        OrderServiceImpl bean = ac.getBean(OrderServiceImpl.class);
        MemberRepository memberRepository = bean.getMemberRepository();
        System.out.println("memberRepository = " + memberRepository);
    }
}

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'hello.core.order.OrderServiceImpl' available

	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:341)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:332)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1191)
	at hello.core.scan.AutoAppConfigTest.basicScan(AutoAppConfigTest.java:24)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

spring 객체지향

답변 1

David

안녕하세요. kss8014님, 공식 서포터즈 David입니다.

AutoAppConfig를 통해 컴포넌트 스캔이 잘 이뤄져서 OrderServiceImpl이 빈으로 등록되는지 확인해 주세요.

AutoAppConfig 클래스도 공유해 주시면 답변에 큰 도움이 됩니다:)

감사합니다.

kss8014

질문자

package hello.core;


import hello.core.member.MemberRepository;
import hello.core.member.MemoryMemberRepository;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;

@Configuration
@ComponentScan(
        basePackages = "hello.core.member",
        excludeFilters= @ComponentScan.Filter(type = FilterType.ANNOTATION, classes = Configuration.class)
)
public class AutoAppConfig {

//    @Bean(name = "memoryMemberRepository")
//    MemberRepository memberRepository() {
//        return new MemoryMemberRepository();
//    }
}

package hello.core.scan;

import hello.core.AutoAppConfig;
import hello.core.member.MemberRepository;
import hello.core.member.MemberService;
import hello.core.order.OrderService;
import hello.core.order.OrderServiceImpl;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import static org.assertj.core.api.Assertions.*;

public class AutoAppConfigTest {

    @Test
    void basicScan() {
        ApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class);

        MemberService memberService = ac.getBean(MemberService.class);
        assertThat(memberService).isInstanceOf(MemberService.class);

        OrderServiceImpl bean = ac.getBean(OrderServiceImpl.class);
        MemberRepository memberRepository = bean.getMemberRepository();
        System.out.println("memberRepository = " + memberRepository);
    }
}

안녕하세요. 답변 감사합니다.

클래스는 이렇게 되어있습니다.

David

basePackages = "hello.core.member" 속성 설정으로 인해 hello.core.order에 존재하는 OrderServiceImpl을 스캔하지 않습니다. basePackages를 "hello.core"로 변경해 보시겠어요?

kss8014

질문자

문제 해결됐습니다!

감사합니다.

인프런 커뮤니티 질문&답변

@Autowired 필드 명, @Qualifier, @Primary 강의중 질문드립니다.