spring data jpa : jpa vs spring-data-jpa

spring-data-jpa/build.gradle

@@ -21,6 +21,8 @@ repositories {
 dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'com.github.gavlyukovskiy:p6spy-spring-boot-starter:1.5.7'
+
     compileOnly 'org.projectlombok:lombok'
     runtimeOnly 'com.h2database:h2'
     annotationProcessor 'org.projectlombok:lombok'

spring-data-jpa/src/main/java/com/example/springdatajpa/entity/Member.java

@@ -0,0 +1,25 @@
+package com.example.springdatajpa.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Getter @Setter
+public class Member {
+
+    @Id @GeneratedValue
+    private Long id;
+    private String username;
+
+    protected Member() {
+
+    };
+
+    public Member(String username) {
+        this.username = username;
+    }
+}

spring-data-jpa/src/main/java/com/example/springdatajpa/repository/MemberJpaRepository.java

@@ -0,0 +1,23 @@
+package com.example.springdatajpa.repository;
+
+import com.example.springdatajpa.entity.Member;
+import org.springframework.stereotype.Repository;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+@Repository
+public class MemberJpaRepository {
+
+    @PersistenceContext
+    private EntityManager em;
+
+    public Member save(Member member) {
+        em.persist(member);
+        return member;
+    }
+
+    public Member find(Long id) {
+        return em.find(Member.class, id);
+    }
+}

spring-data-jpa/src/main/java/com/example/springdatajpa/repository/MemberRepository.java

@@ -0,0 +1,7 @@
+package com.example.springdatajpa.repository;
+
+import com.example.springdatajpa.entity.Member;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MemberRepository extends JpaRepository<Member, Long> {
+}

spring-data-jpa/src/main/resources/application.properties

@@ -1 +0,0 @@
-

spring-data-jpa/src/main/resources/application.yml

@@ -0,0 +1,18 @@
+spring:
+  datasource:
+    url: jdbc:h2:tcp://localhost/~/Desktop/study/Study/spring-data-jpa
+    username: sa
+    password:
+    driver-class-name: org.h2.Driver
+
+  jpa:
+    hibernate:
+      ddl-auto: create
+    properties:
+      hibernate:
+#        show_sql: true
+        format_sql: true
+
+logging.level:
+  org.hibernate.SQL: debug
+#  org.hibernate.type: trace

spring-data-jpa/src/test/java/com/example/springdatajpa/repository/MemberJpaRepositoryTest.java

@@ -0,0 +1,31 @@
+package com.example.springdatajpa.repository;
+
+import com.example.springdatajpa.entity.Member;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.transaction.annotation.Transactional;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@SpringBootTest
+@Transactional
+@Rollback(value = false) // 롤백 false
+class MemberJpaRepositoryTest {
+
+    @Autowired MemberJpaRepository memberJpaRepository;
+
+    @Test
+    void testMember() {
+        Member member = new Member("memberA");
+
+        Member savedMember = memberJpaRepository.save(member);
+
+        Member findMember = memberJpaRepository.find(savedMember.getId());
+
+        assertEquals(findMember.getId(), member.getId());
+        assertEquals(findMember.getUsername(), member.getUsername());
+        assertEquals(findMember, member); // findMember == member : 같은 트랜잭션 안에서는 영속성 컨텍스트 동일성 보장
+    }
+}

spring-data-jpa/src/test/java/com/example/springdatajpa/repository/MemberRepositoryTest.java

@@ -0,0 +1,31 @@
+package com.example.springdatajpa.repository;
+
+import com.example.springdatajpa.entity.Member;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.Rollback;
+import org.springframework.transaction.annotation.Transactional;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@SpringBootTest
+@Transactional
+@Rollback(value = false)
+public class MemberRepositoryTest {
+
+    @Autowired MemberRepository memberRepository;
+
+    @Test
+    void testMember() {
+        Member member = new Member("memberA");
+
+        Member savedMember = memberRepository.save(member);
+
+        Member findMember = memberRepository.findById(savedMember.getId()).get();
+
+        assertEquals(findMember.getId(), member.getId());
+        assertEquals(findMember.getUsername(), member.getUsername());
+        assertEquals(findMember, member); // findMember == member : 같은 트랜잭션 안에서는 영속성 컨텍스트 동일성 보장
+    }
+}