Hi,

I can't understand how(if it all) hibernate make sure the object that I want to update with the database are up to date.

For example:
I am using session per "unit-of-work", meaning when a request is coming create or reconnect the session, and when he leave I disconnect the session.
Now, there are 2 users that asked for the same order information and the first user was update the order and right after him the second user try to update the same order.
Do I have an option to know that the object was changed? or do I need to load or refresh the object each time before I update it?

I read something about the LockMode but I didn't understant it and when I tested it, it didn't work.

Avi

I think versioning can be an option.
http://www.hibernate.org/hib_docs/reference/html_single/#transactions-s3
Ciao.