public interface Changeable {

    ChangeInformation getChangeInformation();

    void setChangeInformation(ChangeInformation changeInformation);
}


@NoArgsConstructor
@AllArgsConstructor
@Embeddable
@Data
public class ChangeInformation implements Serializable {

    @Column(name = Columns.CREATION_DATE)
    private DateTime creationDate;

    @Column(name = Columns.LAST_MODIFICATION_DATE)
    private DateTime lastModificationDate;

    public void setCreatedNow() {
        this.creationDate = DateTime.now();
    }

    public void setUpdateNow() {
        this.lastModificationDate = DateTime.now();
    }

    @UtilityClass
    public static class Columns {
        public static final String CREATION_DATE = "creation_date";
        public static final String LAST_MODIFICATION_DATE = "last_modification_date";
    }

}



public class ChangeableListener {

    @PrePersist
    public void onCreation(Changeable changeable) {
        ensureNonNullChangeInformation(changeable);
        changeable.getChangeInformation().setCreatedNow();
    }

    @PreUpdate
    public void onUpdate(Changeable changeable) {
        ensureNonNullChangeInformation(changeable);
        changeable.getChangeInformation().setUpdateNow();
    }

    private void ensureNonNullChangeInformation(Changeable changeable) {
        if (changeable.getChangeInformation() == null) {
            changeable.setChangeInformation(new ChangeInformation());
        }
    }
}



@Entity
@Table(name = "subscription")
@EntityListeners({ ChangeableListener.class })
@NoArgsConstructor
@Getter
@Setter
@EqualsAndHashCode(of = "id")
@FieldDefaults(level = AccessLevel.PRIVATE)
public class Subscription implements Serializable, Changeable {

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

    @Embedded
    ChangeInformation changeInformation;

}