spring data jpa : auditing

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

@@ -2,7 +2,14 @@ package com.example.springdatajpa;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.domain.AuditorAware;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
 
+import java.util.Optional;
+import java.util.UUID;
+
+@EnableJpaAuditing
 @SpringBootApplication
 public class SpringDataJpaApplication {
 
@@ -10,4 +17,10 @@ public class SpringDataJpaApplication {
         SpringApplication.run(SpringDataJpaApplication.class, args);
     }
 
+    @Bean
+    public AuditorAware<String> auditorProvider() {
+        // 세션에서 유저 아이디를 가져와서 사용한다.
+        // Todo
+        return () -> Optional.of(UUID.randomUUID().toString());
+    }
 }

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

@@ -0,0 +1,23 @@
+package com.example.springdatajpa.entity;
+
+import lombok.Getter;
+import org.springframework.data.annotation.CreatedBy;
+import org.springframework.data.annotation.LastModifiedBy;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import javax.persistence.Column;
+import javax.persistence.EntityListeners;
+import javax.persistence.MappedSuperclass;
+
+@EntityListeners(AuditingEntityListener.class)
+@Getter
+@MappedSuperclass
+public class BaseEntity extends BaseTimeEntity{
+
+    @CreatedBy
+    @Column(updatable = false)
+    private String createdBy;
+
+    @LastModifiedBy
+    private String lastModifiedBy;
+}

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

@@ -0,0 +1,24 @@
+package com.example.springdatajpa.entity;
+
+import lombok.Getter;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import javax.persistence.Column;
+import javax.persistence.EntityListeners;
+import javax.persistence.MappedSuperclass;
+import java.time.LocalDateTime;
+
+@EntityListeners(AuditingEntityListener.class)
+@Getter
+@MappedSuperclass
+public class BaseTimeEntity {
+
+    @CreatedDate
+    @Column(updatable = false)
+    private LocalDateTime createdDate;
+
+    @LastModifiedDate
+    private LocalDateTime lastModifiedDate;
+}

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

@@ -0,0 +1,30 @@
+package com.example.springdatajpa.entity;
+
+import lombok.Getter;
+
+import javax.persistence.Column;
+import javax.persistence.MappedSuperclass;
+import javax.persistence.PrePersist;
+import javax.persistence.PreUpdate;
+import java.time.LocalDateTime;
+
+@Getter
+@MappedSuperclass
+public class JpaBaseEntity {
+
+    @Column(updatable = false)
+    private LocalDateTime createdDate;
+    private LocalDateTime updatedDate;
+
+    @PrePersist
+    public void prePersist() {
+        LocalDateTime now = LocalDateTime.now();
+        createdDate = now;
+        updatedDate = now;
+    }
+
+    @PreUpdate
+    public void preUpdate() {
+        updatedDate = LocalDateTime.now();
+    }
+}

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

@@ -13,7 +13,7 @@ import javax.persistence.*;
         query="select m from Member m where m.username = :username"
 )
 @NamedEntityGraph(name = "Member.all", attributeNodes = @NamedAttributeNode("team"))
-public class Member {
+public class Member extends BaseEntity{
 
     @Id @GeneratedValue
     @Column(name = "member_id")

spring-data-jpa/src/test/java/com/example/springdatajpa/entity/MemberTest.java

@@ -1,6 +1,8 @@
 package com.example.springdatajpa.entity;
 
+import com.example.springdatajpa.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.test.annotation.Rollback;
 import org.springframework.transaction.annotation.Transactional;
@@ -20,6 +22,9 @@ class MemberTest {
     @PersistenceContext
     EntityManager em;
 
+    @Autowired
+    MemberRepository memberRepository;
+
     @Test
     void testEntity() {
         Team teamA = new Team("teamA");
@@ -51,5 +56,25 @@ class MemberTest {
         }
     }
 
+    @Test
+    void JpaEventBaseEntity() throws Exception {
+        // given
+        Member member = new Member("member1");
+        memberRepository.save(member); // @PrePersist
 
+        Thread.sleep(100);
+        member.setUsername("member2");
+
+        em.flush();
+        em.clear();
+
+        // when
+        Member findMember = memberRepository.findById(member.getId()).get();
+
+        // then
+        System.out.println("findMember.getCreatedDate = " + findMember.getCreatedDate());
+        System.out.println("findMember.getLastModifiedDate = " + findMember.getLastModifiedDate());
+        System.out.println("findMember.getCreatedBy() = " + findMember.getCreatedBy());
+        System.out.println("findMember.getLastModifiedBy() = " + findMember.getLastModifiedBy());
+    }
 }