Hi,

Does anyone have good idea to copy persistent object between two databases? My scenario is:

1) Retrieve object from databse A by such as session.load() or query.

2) Serialize persistent object into byte stream by ObjectOutputStream.

3) Send chunk of bytes to another machine thru network.

4) Deserialize it by ObjectInputStream into persistent object.

5) Save persistent object to database B.

However, at step 5), how can I save the object into other database than original? The object has it's own id and I've tried to clear it to make database B assign new id. But hibernate says 'could not initialize proxy'. Is ther way to retrieve pojo DMO from proxy so that I can save it into database B?

Hibernate version:3.0.3

Maybe this link helps: http://forum.hibernate.org/viewtopic.ph ... highlight=

Thanks! Your information really helps. I can get implementation object by following code.

Object o = ((HibernateProxy)obj).getHibernateLazyInitializer().getImplementation();

I noticed that if the persistent object has association such as List, its type is org.hibernate.collection.PersistentList.



If I save this object into other database by Session.save(), the association seems to be ignored and not saved. I can avoid this issue to make new ArrayList object before saving this entity.



However, this seems a bit dirty trick to me. Does anyone know smarter way?