[jboss-user] [Persistence, JBoss/CMP, Hibernate, Database] - help with optimistic locking

[balamg]

I have an entity bean on these lines..

@Entity
User {
  @Version int version;
  
   @Id String id;

...
...
}

Then I have a SLSB with this method:

updateUser (User u) {
    @PersistenceContext
    EntityManager em;


   List dbUsers =  em.createQuery("select from User u where u.name = 'user1').getResultList();
    User dbUser = dbUsers.get(0);

    dbUser.setName("user2");
    
   
}

i would have expected the version count of the user to be incremented. this does not happen.

Then i tried with the following
em.lock(dbUser, LockModeType.READ);
and also em.lock(dbUser,LockModeType.WRITE);
before the setter method. 

still the version does not get updated.

What am i doing wrong here..


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