Spring Data force version and lastmodified date to update on JPA Entity

Spring data has a feature that allows you to track automatically a certain amount of fields through annotations :

  • @CreatedDate : The date on which the entity was created
  • @CreatedBy : The user that created the entity
  • @LastModifiedDate : The date the entity was last modified
  • @LastModifiedBy : The user that modified last the entity
  • @Version : the version of the entity (increased each time the entity is modified and savesd)

Let's say for example we have this simple entity with the appropriate annotations :


@Entity
@EntityListeners(AuditingEntityListener.class)
public class Contact implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Version()
    private Long version = 0L;

    @NotNull
    @CreatedDate
    private Date creationDate;

    @NotNull
    @Size(max = 50)
    @CreatedBy
    private String creationUserLogin;

    @NotNull
    @LastModifiedDate
    private Date modificationDate;

    @NotNull
    @Size(max = 50)
    @LastModifiedBy
    private String modificationUserLogin;

   private String firstName;

   private String lastName;

 //GETTERS - SETTERS and other code
   

}

And we're using the following service class and repository :


@Service
public class ContactServiceImpl implements ContactService{

   @Autowired
   private ContactRepository contactRepository;


  public Contact save(Contact contact){
   
    return contactRepository.save(entity);
  }
}


public interface ContactRepository extends JpaRepository<Contact, Long> {

}

Now whenever you change the value of one of the fields in the entity; the fields marked with @Version, @LastModified and @LastModifiedBy will be updated with new values automatically.

Now recently I had the case where I had to "touch" an entity (like in linux) so that the version will be increased as well as @LastModified and @LastModifiedBy will be updated accordingly even though none of the fields had been updated

Now you cannot update the automatically handled fields manually, but there is a way you can achieve this by using Spring's AuditingHandler; so we could modify our service class as follows :


@Service
public class ContactServiceImpl implements ContactService{

    @Autowired
    private ContactRepository contactRepository;

    @Autowired
    private AuditingHandler auditingHandler;

   
    public Contact save(Contact contact, boolean forceVersionIncrease){
         //force version update even though no values have changed in the entity
         if(forceVersionIncrease){
             auditingHandler.markModified(contact);
         }
   
     return contactRepository.save(entity);
   }
}

And there you go, you should be able now to "touch" your entities and force date and version updates

Angular6 hiding component selector

It's sometimes useful to have angular's component selector not to be rendered in the page, as sometimes this can cause problems with...