인프런 커뮤니티 질문&답변

도도한 하마님의 프로필 이미지
도도한 하마

작성한 질문수

스프링 입문 - 코드로 배우는 스프링 부트, 웹 MVC, DB 접근 기술

jpa부분에서 오류가 났어요...

작성

·

209

0

일단 jpa로 진행하던중 오류가 났습니다..

Member.java

Member.javapackage hwang.hwangspring.domain;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity //->JPA가 관리하는 ENTITY라는 의미가 됨
public class Member {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id; //시스템이 정해줌
    private String name; //고객이 회원가입할 때 적는 이름

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

JpaMemberRepository.java


import javax.persistence.EntityManager;
import java.util.List;
import java.util.Optional;

public class JpaMemberRepository implements MemberRepository{

    private final EntityManager em;

    public JpaMemberRepository(EntityManager em) {
        this.em = em;
    }

    @Override
    public Member save(Member member) {
        em.persist(member);
        return member;
    }

    @Override
    public Optional<Member> findById(Long id) {
        Member member = em.find(Member.class,id);
        return Optional.ofNullable(member);
    }

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

    @Override
    public List<Member> findAll() {
        List<Member> result = em.createQuery("select m from Member m", Member.class).getResultList();
        return result; //객체 자체를 return,
    }
}

Springconfig.java

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

@Configuration
public class SpringConfig {

    private  final EntityManager em;
    private final DataSource dataSource;
    @Autowired

    public SpringConfig(DataSource dataSource,EntityManager em){
        this.dataSource=dataSource;
        this.em=em;
    }
    @Bean
    public MemberService memberService() { // 이 로직을 등록해서 스프링 빈에 등록을 해줌

        return new MemberService((MemoryMemberRepository) memberRepository()); //MemberService()가 스트링빈에 등록됨

    }

    @Bean
    public MemberRepository memberRepository(){
        return new JpaMemberRepository(em);
    }
}

MemberIntegrataionTest를 실행할경우

package hwang.hwangspring.service;


import hwang.hwangspring.domain.Member;
import hwang.hwangspring.repository.MemberRepository;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.transaction.annotation.Transactional;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
@SpringBootTest
@Transactional
class MemberServiceIntegrationTest {
    @Autowired MemberService memberService;
    @Autowired MemberRepository memberRepository;
    @Test
    public void 회원가입() throws Exception {
        //Given
        Member member = new Member();
        member.setName("hello");
        //When
        Long saveId = memberService.join(member);
        //Then
        Member findMember = memberRepository.findById(saveId).get();
        assertEquals(member.getName(), findMember.getName());
    }
    @Test
    public void 중복_회원_예외() throws Exception {
        //Given
        Member member1 = new Member();
        member1.setName("spring");
        Member member2 = new Member();
        member2.setName("spring");
        //When
        memberService.join(member1);
        IllegalStateException e = assertThrows(IllegalStateException.class,
                () -> memberService.join(member2));//예외가 발생해야 한다.
        assertThat(e.getMessage()).isEqualTo("이미 존재하는 회원입니다.");
    }
}

아래와 같은 오류가 뜹니다 ㅠㅠ

 

java.lang.IllegalStateException: Failed to load ApplicationContext

at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:98)

at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:124)

at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190)

at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132)

at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:248)

at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:138)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$8(ClassBasedTestDescriptor.java:363)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:368)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$9(ClassBasedTestDescriptor.java:363)

at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)

at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)

at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655)

at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)

at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)

at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312)

at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)

at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)

at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:362)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$instantiateAndPostProcessTestInstance$6(ClassBasedTestDescriptor.java:283)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:282)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$4(ClassBasedTestDescriptor.java:272)

at java.base/java.util.Optional.orElseGet(Optional.java:369)

at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$5(ClassBasedTestDescriptor.java:271)

at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:31)

at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:102)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:101)

at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:66)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$2(NodeTestTask.java:123)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:123)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:90)

at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)

at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)

at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)

at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)

at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)

at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)

at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)

at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)

at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)

at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)

at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)

at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:107)

at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)

at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)

at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)

at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)

at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)

at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:86)

at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:86)

at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:53)

at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:57)

at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)

at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)

at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)

at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232)

at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'memberController' defined in file [C:\Users\hyk46\hwang-spring\hwang-spring\out\production\classes\hwang\hwangspring\controller\MemberController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'memberService' defined in class path resource [hwang/hwangspring/SpringConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [hwang.hwangspring.service.MemberService]: Factory method 'memberService' threw exception; nested exception is java.lang.ClassCastException: class hwang.hwangspring.repository.JpaMemberRepository cannot be cast to class hwang.hwangspring.repository.MemoryMemberRepository (hwang.hwangspring.repository.JpaMemberRepository and hwang.hwangspring.repository.MemoryMemberRepository are in unnamed module of loader 'app')

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)

at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:920)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731)

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)

at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:136)

at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:141)

at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:90)

... 71 more

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'memberService' defined in class path resource [hwang/hwangspring/SpringConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [hwang.hwangspring.service.MemberService]: Factory method 'memberService' threw exception; nested exception is java.lang.ClassCastException: class hwang.hwangspring.repository.JpaMemberRepository cannot be cast to class hwang.hwangspring.repository.MemoryMemberRepository (hwang.hwangspring.repository.JpaMemberRepository and hwang.hwangspring.repository.MemoryMemberRepository are in unnamed module of loader 'app')

at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658)

at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:486)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)

at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311)

at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887)

at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)

... 89 more

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [hwang.hwangspring.service.MemberService]: Factory method 'memberService' threw exception; nested exception is java.lang.ClassCastException: class hwang.hwangspring.repository.JpaMemberRepository cannot be cast to class hwang.hwangspring.repository.MemoryMemberRepository (hwang.hwangspring.repository.JpaMemberRepository and hwang.hwangspring.repository.MemoryMemberRepository are in unnamed module of loader 'app')

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)

at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)

... 103 more

Caused by: java.lang.ClassCastException: class hwang.hwangspring.repository.JpaMemberRepository cannot be cast to class hwang.hwangspring.repository.MemoryMemberRepository (hwang.hwangspring.repository.JpaMemberRepository and hwang.hwangspring.repository.MemoryMemberRepository are in unnamed module of loader 'app')

at hwang.hwangspring.SpringConfig.memberService(SpringConfig.java:29)

at hwang.hwangspring.SpringConfig$$EnhancerBySpringCGLIB$$f992599.CGLIB$memberService$0(<generated>)

at hwang.hwangspring.SpringConfig$$EnhancerBySpringCGLIB$$f992599$$FastClassBySpringCGLIB$$aa36e038.invoke(<generated>)

at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)

at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331)

at hwang.hwangspring.SpringConfig$$EnhancerBySpringCGLIB$$f992599.memberService(<generated>)

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

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

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

at java.base/java.lang.reflect.Method.invoke(Method.java:566)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)

... 104 more

javaspringmvcspring-boot

답변 1

0

y2gcoder님의 프로필 이미지
y2gcoder

안녕하세요. 도도한 하마님, 공식 서포터즈 y2gcoder입니다.

제가 바로 해결책을 드릴 수 있지만,

예외 전문이 너무 친절하고 강의 코드와 비교하면 바로 해결할 수 있는 문제라고 생각해서 원인을 찾을 수 있는 포인트만 알려드리겠습니다. 

Caused by: java.lang.ClassCastException: class hwang.hwangspring.repository.JpaMemberRepository cannot be cast to class hwang.hwangspring.repository.MemoryMemberRepository (hwang.hwangspring.repository.JpaMemberRepository and hwang.hwangspring.repository.MemoryMemberRepository are in unnamed module of loader 'app')

at hwang.hwangspring.SpringConfig.memberService(SpringConfig.java:29)

예외에서는 해당 부분에 문제가 있고 캐스팅을 할 수 없다고 친절하게 말해주고 있습니다.

SpringConfig 쪽에 문제가 있다고 합니다!

그러면 SpringConfig를 현재 수강하고 계시는 시점 전후로 강의 자료 및 영상속 코드와 비교해보시면 바로 해결하실 수 있을 거라 믿습니다 :)

 

감사합니다.

도도한 하마님의 프로필 이미지
도도한 하마

작성한 질문수

전체 Q&A
질문하기