Question

是否可以在Hibernate中为@SQLDelete覆盖添加自定义参数？我不想编辑Hibernate源代码。在下面的示例中，我尝试在删除查询中包含lastUpdatedBy列。

感谢您的帮助。

@Entity
@Table(name = "user")
@SQLDelete(sql = "UPDATE user SET deleted='Y', version=version+1 WHERE id=? AND version=? AND lastUpdatedBy = ?")
public class User  {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id", unique = true, nullable = false)
    private Long id;

    @Column(name = "deleted")
    @Type(type = "yes_no")
    protected boolean deleted;

    @Version
    @Column(name = "version", nullable = false)
    protected Integer version;

    @Column(name = "last_updated_by")
    protected Long lastUpdatedBy;

    ...

}

Answer 1

下面是示例代码，您可以按照手动覆盖删除事件的代码：

public class CustomDeleteEventListener extends DefaultDeleteEventListener implements DeleteEventListener {

    private static final Logger log = Logger.getLogger(CustomDeleteEventListener.class);

    @Autowired
    private UserService userService;

    /**
     * Override the default delete logic here, handle the given delete event.
     *
     * @param event DeleteEvent object which can get hibernate session or entity
     * @param transientEntities The cache of entities already deleted
     * @throws HibernateException
     */
    @Override
    public void onDelete(DeleteEvent event, Set transientEntities) throws HibernateException {
        // get current deleting entity from event
        Object entity = event.getObject();
        if (log.isDebugEnabled()) {
            log.debug("entity class type is " + entity.getClass());
        }
        if (entity instanceof User) {
            if (log.isDebugEnabled()) {
                log.debug("Detect delete User event, delegate to user service to do soft deletion. entity type: " + entity.getClass());
            }
            userService.removeUser((User) entity);
        } else {
            // other entities still follow their default logic
            super.onDelete(event, transientEntities);
        }
    }
}

是否可以在Hibernate中为@SQLDelete覆盖添加自定义参数？

1 个答案: