Version field

francof · **Joined:** Fri Aug 17, 2007 2:11 pm **Posts:** 19

Hi

I'm new to Hibernate.

I have created an entity and annotated it with a version field on my table.

Code:

    @Version
    @Column(name = "OBJ_VERSION")
    private int version = 0;

Everything works fine as expected if user B overwrites data already modified by user A - however not able to capture org.hibernate.StaleObjectStateException gracefully in my Seam application (will look into that later)

my question really is what happens when the obj_version field on my table reaches it's maximum value?, how will hibernate do a version check then? - do i need to manually reset this when I realize this or will hibernate recycle and set the version number to 1 and start again.

Thanks
Franco

cbredesen · **Posted:** Fri Aug 17, 2007 3:26 pm

org.hibernate.type.IntegerType:

Code:

public Object next(Object current, SessionImplementor session) {
   return new Integer( ( (Integer) current ).intValue() + 1 );
}

In short, no it doesn't roll over like your odometer. You are aware of Integer.MAX_VALUE and what that implies right?

http://java.sun.com/j2se/1.4.2/docs/api ... .MAX_VALUE

That's a LOT of versions. 2,147,483,647 Not enough? Use long instead. That'll get you all the way up to 9,223,372,036,854,775,807 at which time you are welcome to reply to this thread and I'll provide you with a workaround :)

-Chris

francof · **Joined:** Fri Aug 17, 2007 2:11 pm **Posts:** 19

And I was sweating for no reason!

Thank you.