Entity Listener : 3(@AuditingEntityListener)

앞에서 정보의 생성/수정시 생성된 시간/수정된 시간이 입력될 수 있도록

EntityListener를 직접 만들어서 활용했다.

2021.06.15 - [JPA] - Entity Listener - 1

Entity Listener - 1

2021.06.16 - [JPA] - Entity Listener : 2

Entity Listener : 2

 

 

??? : 짜잔! 미리 준비해왔어요!

생성시간/수정시간 같은 것들은 항상 쓰이기 때문에 spring 에서 기본으로 제공하는 Listener가 있다.

 

 

1. BookManager Application에 @EnableJpaAuditing

---

package com.jpa.bookmanager;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;

@SpringBootApplication
@EnableJpaAuditing
public class BookmanagerApplication {

    public static void main(String[] args) {
        SpringApplication.run(BookmanagerApplication.class, args);
    }

}

 

2. @EntityListeners 수정(MyEntityListener --> AuditingEntityListener)

---

@EntityListeners(value = {AuditingEntityListener.class, UserEntityListener.class})
public class User implements Auditable{

 

@EntityListeners(value = AuditingEntityListener.class)
public class Book implements Auditable {

 

3.Audiding할 변수에 @annotation 지정

---

createdAt, updatedAt에 annotaion을 붙여주자

 createdAt --> @CreatedDate

  updatedAt --> @LastModifiedDate

 

- User class

package com.jpa.bookmanager.domain;

import lombok.*;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;

import javax.persistence.*;
import java.lang.reflect.GenericDeclaration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.List;

@NoArgsConstructor
@AllArgsConstructor
@RequiredArgsConstructor
@Data
@Builder
@Entity //Entity에는 primary key가 꼭 필요함., JPA가 관리하고 있는 객체
@EqualsAndHashCode
@Table
@EntityListeners(value = {AuditingEntityListener.class, UserEntityListener.class})
public class User implements Auditable{

    @NonNull
    private String name;


    @NonNull
    private String email;

    @Column
    @CreatedDate
    private LocalDateTime createdAt;

    @Column
    @LastModifiedDate
    private LocalDateTime updatedAt;

    @Id
    @GeneratedValue //자동으로 하나씩 증가함.
    private Long id;


    @Transient 
    private String testData;


    @Enumerated(value = EnumType.STRING)
    private Gender gender;


}

- UserHistory class

@Entity
@NoArgsConstructor
@Data
@EntityListeners(value = AuditingEntityListener.class)
public class UserHistory implements Auditable{

    @Id
    @GeneratedValue
    private long id;

    private Long userId;

    private String name;

    private String email;

    @CreatedDate
    private LocalDateTime createdAt;
    @LastModifiedDate
    private LocalDateTime updatedAt;

}

겁나 간단하게 설정이 가능하다.

UserHistory(id=6, userId=null, name=hyun19, email=hyun19@navernaver.com, 
            createdAt=2021-06-16T23:11:32.481450, updatedAt=2021-06-16T23:11:32.481450)
UserHistory(id=8, userId=7, name=hyun20_new, email=hyun19@navernaver.com, 
            createdAt=2021-06-16T23:11:32.573145, updatedAt=2021-06-16T23:11:32.573145)