인프런 커뮤니티 질문&답변

안녕하세요,

강의 진행중 아래와 같은 에러가 떠서 보니 memberservice가 중복되서 등록이 되어있다고 하는 것 같은데요, 

Caused by: org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'memberService' defined in class path resource [hello/hellospring/SpringConfig.class]: Cannot register bean definition [Root bean: class [null]; scope=; abstract=false; lazyInit=null; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=springConfig; factoryMethodName=memberService; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [hello/hellospring/SpringConfig.class]] for bean 'memberService': There is already [Generic bean: class [hello.hellospring.service.MemberService]; scope=singleton; abstract=false; lazyInit=null; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null; defined in file [C:\Users\63328\git\hello-spring\hello-spring\out\production\classes\hello\hellospring\service\MemberService.class]] bound.

아래처럼 세팅이 되어있었는데, memberserivce.java에 @memberservice 어노테이션을 지우면 잘 돌더라구요. 중복되서 bean이 등록되어서 그런건가요?  SpringDataJpaMemberRepository.java랑 Memberservice.java에서 두번 등록된건가요? 

Memberservice.java

package hello.hellospring.service;

import hello.hellospring.domain.Member;
import hello.hellospring.repository.MemberRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Optional;

@Transactional // jpa를 쓰려면 항상 transcation이 있어야함
@Service // 이게 없으면 그냥 순수한 자바코드
public class MemberService {

private final MemberRepository memberRepository;

 @Autowired
 public MemberService(MemberRepository memberRepository) {
this.memberRepository = memberRepository;
 }

/**
 * 회원가입
 */
 public Long join(Member member) {
//같은 이름이 있는 중복 회원은 안됨!
 validateDuplicateMember(member);

 memberRepository.save(member);
 return member.getId();
 }

private void validateDuplicateMember(Member member) {
/**
 Optional<Member> result = memberRepository.findByName(member.getName());

 ifPresent 이란? result의 값이 있으면 동작. Optional에서만 동작
 result.ifPresent(m -> {
 throw new IllegalStateException("이미 존재하는 회원입니다.");
 });
 **/
 memberRepository.findByName(member.getName())
.ifPresent(m -> {
throw new IllegalStateException("이미 존재하는 회원입니다.");
 });
 }

/**
 * 전체 회원 조회
 */
 public List<Member> findMembers() {
return memberRepository.findAll();
 }

public Optional<Member> findOne(Long memberId) {
return memberRepository.findById(memberId);
 }
}

--------------------------------
SpringConfig.java

package hello.hellospring;

import hello.hellospring.repository.JdbcMemberRepository;
import hello.hellospring.repository.JdbcTemplateMemberRepository;
import hello.hellospring.repository.JpaMemberRepository;
import hello.hellospring.repository.MemberRepository;
import hello.hellospring.service.MemberService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.sql.DataSource;

// 어셈블리 코드
// OCP : 개방 - 폐쇄 원칙
@Configuration
public class SpringConfig {

    private final MemberRepository memberRepository;

    @Autowired
    public SpringConfig(MemberRepository memberRepository) {
        this.memberRepository = memberRepository;
    }

    /**

     @PersistenceContext
    private EntityManager em;
    //private DataSource dataSource;
    // springboot가 application.properties를 보고 자체적으로 bean생성. 즉, datasource 생성.

    @Autowired
    public SpringConfig(DataSource dataSource) {
        this.dataSource = dataSource;
    }

    @Autowired
    public SpringConfig(EntityManager em) {
        this.em = em;
    }
     **/

    @Bean // spring bean 등록
    public MemberService memberService() {
        //return new MemberService(memberRepository());
        return new MemberService(memberRepository);
    }

    /**

     @Bean
    public MemberRepository memberRepository() {
        //return new MemoryMemberCloneRepository();
        //return new JdbcMemberRepository(dataSource);
        //return new JdbcTemplateMemberRepository(dataSource);
        //return new JpaMemberRepository(em);
        return new JpaMemberRepository(em);
    }
    **/
}


-----------
SpringDataJpaMemberRepository.java


package hello.hellospring.repository;

import hello.hellospring.domain.Member;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.Optional;

// springdataJPA가 JpaRepository 를 상속하고 있으면 자동으로 구현체를 spring bean에 등록해줌
public interface SpringDataJpaMemberRepository extends JpaRepository<Member, Long>, MemberRepository {

    @Override
    Optional<Member> findByName(String name);
}