2024-11-26T00:35:16.249Z

1

https://drive.google.com/file/d/1XYU4QN9zO5nphBXNf-PTd4Ph7xbleio7/view?usp=sharing

1) test/jpabook/jpashop/service/MemberServiceTest.java 실행하면 됩니다.
2)
Java HotSpot(TM) 64-Bit Server VM warning: Sharing is only supported for boot loader classes because bootstrap classpath has been appended

2024-11-27T15:33:29.929+09:00 INFO 11428 --- [ main] p6spy : #1732689209929 | took 0ms | rollback | connection 4| url jdbc:h2:mem:0f23e7e7-05f2-4edd-b11b-02a2cb3a88d3

;

java.lang.NullPointerException: Cannot invoke "jakarta.persistence.EntityManager.createQuery(String, java.lang.Class)" because "this.em" is null

at jpabook.jpashop.repository.MemberRepository.findByName(MemberRepository.java:44)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:568)

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:355)

at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)

at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:138)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)

at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:720)

at jpabook.jpashop.repository.MemberRepository$$SpringCGLIB$$0.findByName(<generated>)

at jpabook.jpashop.service.MemberService.validateDuplicateMember(MemberService.java:51)

at jpabook.jpashop.service.MemberService.join(MemberService.java:43)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:568)

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:355)

at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)

at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:379)

at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:768)

at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:720)

at jpabook.jpashop.service.MemberService$$SpringCGLIB$$0.join(<generated>)

at jpabook.jpashop.service.MemberServiceTest.회원가입(MemberServiceTest.java:26)

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)

0

해결했습니다~

0

보내주신 코드 살펴봤습니다!

1. EntityManager em = null 해결: @PersistenceContext 를 통해 주입하던 em을 롬복 @RequiredArgsConstructor 를 통한 생성자 주입으로 바꾸셨습니다. 해당 방법은 not null인 필드에 한해서만 생성자를 자동으로 만들어주게 됩니다. not null 인 필드가 되려면 대상 필드에 @NonNull 이 붙어있거나 final 키워드가 붙어 있어야 합니다!

   @Repository //스프링빈으로 등록(@Component가 들어있어서 컴포넌트 스캔대상)
   @RequiredArgsConstructor
   public class MemberRepository {
   
       //스프링이 EntityManger를 만들어서 여기다 주입(Injection)해줌
       //스프링이 생성한 JPA의 엔티티 매니저를 지가 여기다 주입해줌
   //    @PersistenceContext //Service와 마찬가지로 @RequiredArgsConstructor쓰면 영속성 컨텍스트 생략가능
   //    private EntityManager em; // 기존
       private final EntityManager em; // TODO final 키워드를 추가해주세요!
   ...
   }

    

2. Member entity 와 필드 일치: username으로 변경해주셨다면 MemberRepository의 findByName에 있는 JPQL 에서의 m.name 도 m.username 으로 바꿔주세요!
   

   public List<Member> findByName(String name) {
           return em.createQuery("select m from Member m where m.username= :name", Member.class)
                   .setParameter("name", name)
                   .getResultList();
       }

    

이렇게 해주시면 테스트가 통과하게 됩니다!

감사합니다!