Hi,

What I would like to do is to create backlog of changes by hooking Interceptor onFlushDirty method and saving changes in same transaction as flush happens.

Is it possible to save History instance (newly created intsnce which has list of changes recorded) along with changed object using same flush/commit within onFlushDirty method hook?

For example:

public class HistoryHook implements Interceptor {

private Session cs;

public HistoryHook(Session s) {
cs=s;
}

public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types) throws CallbackException {
if(entity instanceof History) return false;
History h = new History(Object entity, Serializable id, Object[] currentState, Object[] previousState, String[] propertyNames, Type[] types);
cs.save(h);
return false;
}
}


Will something like this work? If not - what would be your take to record and store change history using Hibernate?

Rihards

This works, but you can't use the same Session. Just pass in the Session as in your example, but actually use a new Session on the same connection, in Interceptor onFlushDirty:

Oh, and don't forget to flush() that new Session at the end. You don't have to commit or start any transaction (the connection already has one).

thanks christian.
have not tried it yet - are you sure it is going to be within same COMMIT?
or there are going to be two commits?

You just use the same connection, the first Session (and the "outside" code) still manages the transaction.