Lombok with hibernate

Question

Is this possible? Haven't seen much discussion on it.

score 29 · Answer 1 · answered Aug 01 '11 at 20:12

29

Sure! It works great from my experience. Here's an example entity:

@Entity
@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class PingerEntity {
    // ID
    @Id
    @Getter
    @Setter
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;


    // USER
    @Getter
    @Setter
    @ManyToOne(fetch = FetchType.LAZY, optional = false)
    private UserEntity user;


    // URL
    @Getter
    @Setter
    @Basic(optional = false)
    private String url;


    /**
     * The number of seconds between checks
     */
    @Getter
    @Setter
    @Basic(optional = false)
    private int frequency; 


    @Getter
    @Setter
    @Basic(optional = false)
    @Enumerated(EnumType.STRING)
    public MonitorType monitorType;
}

answered Aug 01 '11 at 20:12

wmacura

799
8
12

15

If you use Data, you don't have to put Getter and Setter on each field. You might want to also specify EqualsAndHashcode(of={"id"}) – Roel Spilker Dec 21 '11 at 09:20
26

@RoelSpilker Yes but be careful with entities having OneToMany and ManyToOne, because the ToString of lombok will make an infinite loop. – qwertzguy Mar 05 '13 at 13:57
2

That's the one I was looking for, I had an infinite loop for one of these entities and it caused a stackoverflowerror. Thanks for the tip! – Dieter Hubau Jul 04 '14 at 20:07
@qwertzguy : Could you please elaborate further on your reply stated above. I am missing your point. – ecdhe Dec 01 '17 at 17:09
2

@ecdhe basically having an entity that links to the other and itself links back to the first one. They will then each call toString on each other repeatedly. – qwertzguy Dec 01 '17 at 22:41
@qwertzguy now I understand it much better. Many thanks :) – ecdhe Dec 01 '17 at 23:33

score 16 · Answer 2 · answered Oct 24 '14 at 15:52

16

You can use it also with @Data (and it works !)

@Entity
@Data
public class Customer {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    private String firstName;
    private String lastName;

}

answered Oct 24 '14 at 15:52

Marcin Szymczak

11,199
5
55
63

9

I had problems with @Data annotation and hibernate. First problme was with hashCode() generated method, hibernate just failed to create entitry. Other one with toString() method in case model cantains Lists or Sets. Just #Setter #Getter so far so good. #ToString only if model conatins only plain data fields – ekitru Mar 23 '15 at 12:18
1

in fact it doesn't! This article explains why in details https://www.jpa-buddy.com/blog/lombok-and-jpa-what-may-go-wrong/. – aleksey.stukalov Jul 11 '21 at 20:22

score 10 · Accepted Answer · answered Feb 01 '11 at 19:06

I have never tried Lombok with Hibernate but I don't see why it shouldn't work. Also, take a look here: http://groups.google.com/group/project-lombok/browse_thread/thread/294bd52d9d8695df/7bc6b0f343831af1?lnk=gst&q=hibernate#7bc6b0f343831af1

Also, Lombok project release notes mention Hibernate explicitely.

score 4 · Answer 4 · answered Jul 25 '19 at 06:21

A simple example; Library.java:

@Data
@NoArgsConstructor // JPA
@Entity
@Table(name = "libraries")
public class Library {

  @Id
  @GeneratedValue
  private Long id;

  @OneToMany(cascade = CascadeType.ALL)
  @EqualsAndHashCode.Exclude
  // This will be included in the json
  private List<Book> books = new ArrayList<>();

  @JsonIgnore
  public void addBook(Book book) {
    books.add(book);
    book.setLibrary(this);
  }
}

And Book.java:

@Data
@NoArgsConstructor // JPA
@Entity
@Table(name = "books")
public class Book {

  @Id
  @GeneratedValue
  private Long id;

  @NotBlank
  private String title;

  @ManyToOne
  @JoinColumn(name = "library_id") // Owning side of the relationship
  @EqualsAndHashCode.Exclude
  @JsonIgnore // Avoid infinite loops
  private Library library;
}

Lombok with hibernate

4 Answers4

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