인프런 커뮤니티 질문&답변

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두잇베스트

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실전! 스프링 부트와 JPA 활용2 - API 개발과 성능 최적화

조회용 샘플 데이터 입력

강사님 에러 질문입니다. ㅠㅠ

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Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

2020-11-17 16:24:19.845 ERROR 34406 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'initDb': Invocation of init method failed; nested exception is java.lang.NullPointerException

at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:139) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:413) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1761) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:514) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:321) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:319) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:863) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.1.16.RELEASE.jar:2.1.16.RELEASE]

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) [spring-boot-2.1.16.RELEASE.jar:2.1.16.RELEASE]

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) [spring-boot-2.1.16.RELEASE.jar:2.1.16.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) [spring-boot-2.1.16.RELEASE.jar:2.1.16.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.1.16.RELEASE.jar:2.1.16.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) [spring-boot-2.1.16.RELEASE.jar:2.1.16.RELEASE]

at jpabook.jpashop.JpashopApplication.main(JpashopApplication.java:10) [classes/:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_201]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_201]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_201]

at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_201]

at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.16.RELEASE.jar:2.1.16.RELEASE]

Caused by: java.lang.NullPointerException: null

at jpabook.jpashop.initDb$InitService.dbInit1(initDb.java:43) ~[classes/:na]

at jpabook.jpashop.initDb$InitService$$FastClassBySpringCGLIB$$2eb0016.invoke(<generated>) ~[classes/:na]

at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:752) ~[spring-aop-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:295) ~[spring-tx-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691) ~[spring-aop-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at jpabook.jpashop.initDb$InitService$$EnhancerBySpringCGLIB$$a95ed200.dbInit1(<generated>) ~[classes/:na]

at jpabook.jpashop.initDb.init(initDb.java:29) ~[classes/:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_201]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_201]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_201]

at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_201]

at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:307) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136) ~[spring-beans-5.1.17.RELEASE.jar:5.1.17.RELEASE]

... 23 common frames omitted

package jpabook.jpashop;

import jpabook.jpashop.domain.*;
import jpabook.jpashop.domain.Item.Book;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.PostConstruct;
import javax.persistence.EntityManager;


// 총 주문 2
//-userA
//    JPA1 BOOK
//    JPA2 BOOK
//-userB
//    SPRING1 BOOK
//    SPRING2 BOOK
@Component
@RequiredArgsConstructor
public class initDb {


    private final InitService initService;

    @PostConstruct
    public void init() {
        initService.dbInit1();
    }


    @Component
    @Transactional
    @RequiredArgsConstructor
    static class InitService {

        private EntityManager em;
        public void dbInit1() {
            Member member = new Member();
            member.setName("userA");
            member.setAddress(new Address("서울","1", "1111"));
            em.persist(member);

            Book book1 = new Book();
            book1.setName("JPA1 BOOK");
            book1.setPrice(10000);
            book1.setStockQuantity(100);
            em.persist(book1);

            Book book2 = new Book();
            book2.setName("JPA2 BOOK");
            book2.setPrice(20000);
            book2.setStockQuantity(100);
            em.persist(book2);

            OrderItem orderItem1 = OrderItem.createOrderItem(book1, 10000, 1);
            OrderItem orderItem2 = OrderItem.createOrderItem(book2, 20000, 2);

            Delivery delivery = new Delivery();
            delivery.setAddress(member.getAddress());
            Order order = Order.createOrder(member, delivery, orderItem1, orderItem2);
            em.persist(order);
        }
    }

}

아마도 initDb 빈 생성에서 에러가 나는거 같은데 왜 그런지 모르겠습니다. 

JPAspring-bootjavaspring

답변 3

3

김영한님의 프로필 이미지
김영한
지식공유자

안녕하세요. 두잇베스트님

private EntityManager em; -> private final EntityManager em;

final 키워드 추가해주세요^^

1

두잇베스트님의 프로필 이미지
두잇베스트
질문자

아 감사합니다! 제가 딴곳에서 찾고 있어네요.. build 파일 뭐가 문제지 찾으면서.. 빼먹은게 문제일줄이야.. 허탈하긴 하지만

감사합니다 강사님!! 좋은 강의 해주셔서 감사합니다 ㅎㅎ

0

두잇베스트님의 프로필 이미지
두잇베스트
질문자

build.gradle 파일은 전에 설정 하신대로 이렇게 되있습니다.  잘되다가 에러가 나네요 ㅠ. 

plugins {
	id 'org.springframework.boot' version '2.1.16.RELEASE'
	id 'java'
}
apply plugin: 'io.spring.dependency-management'
ext["h2.version"] = "1.4.200" //h2 데이터베이스 버전 지정
ext["hibernate.version"] = "5.4.20.Final" //하이버네이트 버전 지정
group = 'jpabook'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '1.8'
configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}
repositories {
	mavenCentral()
}
dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-web'
	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	implementation 'org.springframework.boot:spring-boot-devtools'
	implementation 'com.github.gavlyukovskiy:p6spy-spring-boot-starter:1.5.6'
	compileOnly 'org.projectlombok:lombok'
	runtimeOnly 'com.h2database:h2'
	annotationProcessor 'org.projectlombok:lombok'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}
두잇베스트님의 프로필 이미지
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