休眠，保存一个对象的以前的状态 [英] Hibernate, save the previous state of an object

问题描述

是否有任何普遍接受的，经过验证的工作方式使用hibernate，它保留了数据库中实体更改的历史记录？

我们需要跟踪我们希望能够撤消对对象的更改。

我尝试使用hibernate的拦截器，但只有当对象的旧状态做 merge（）。大多数情况下，我们会做 update（）或 saveOrUpdate（），尽管...

我现在正在让Guice和Guice一起管理会话。

解决方案

我已经完成了使用拦截器（根据 EmptyInterceptor 创建我自己的拦截器）。我能够在onFlushDirty（）中获得所有更改（合并，保存，保存更新和删除）。

EmptyInterceptor 我使用过：

  @Override 
 public boolean onFlushDirty（Object object，Serializable id，
 Object [] newValues，Object [] oldValues，String []属性，
类型[]类型）throws CallbackException {
 
 @Override 
 public boolean onSave （Object object，Serializable id，Object [] newValues，
 String [] properties，Type [] types）throws CallbackException {
 $ b $ @Override 
 public void onDelete（Object object，序列化ID，Object [] newValues，
 String []属性，Type []类型）抛出CallbackException {
  

在onFlushDirty（）中我必须查询实体的前一个状态：

  Connection c = sessionFactory.getCurrentSession（ ）。连接（）; 
 Session session = sessionFactory.openSession（c）; 
 
 BaseEntity newBaseEntity =（BaseEntity）对象; 
 BaseEntity oldBaseEntity =（BaseEntity）session.get（newBaseEntity.getClass（），newBaseEntity.getId（））; 
  

Is there any generally accepted, proven-to-work way using hibernate, that keeps a history of an entitys changes in the database?

We need to keep track of quite some objects and we want to be able to undo changes to objects.

I tried using the interceptors of hibernate, but the old state of the object is only available when doing merge(). Mostly we do update() or saveOrUpdate() though...

I'm currently letting warp-persist together with Guice manage the session.

解决方案

I've done this with an Interceptor (creating my own based on EmptyInterceptor). I was able to get all changes (merge, save, saveOrUpdate and delete) in onFlushDirty().

The methods of EmptyInterceptor I used:

@Override
public boolean onFlushDirty(Object object, Serializable id,
    Object[] newValues, Object[] oldValues, String[] properties,
    Type[] types) throws CallbackException {

@Override
public boolean onSave(Object object, Serializable id, Object[] newValues,
    String[] properties, Type[] types) throws CallbackException {

@Override
public void onDelete(Object object, Serializable id, Object[] newValues,
    String[] properties, Type[] types) throws CallbackException {

In onFlushDirty() I had to query the previous state of the entity:

Connection c = sessionFactory.getCurrentSession().connection();
Session session = sessionFactory.openSession(c);

BaseEntity newBaseEntity = (BaseEntity) object;
BaseEntity oldBaseEntity = (BaseEntity) session.get(newBaseEntity.getClass(), newBaseEntity.getId());

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