GWT + JDO (GAE)

Hello, guys.

I've been using JDO these weeks. I've followed the tutorial at GAE
Docs, and I learned how to create and get entity objects.

I've created a class 'User' for my system. This class has the
attributes username(String), password(String), isOnline(boolean) and
score(int).

I've succeeded at updating the isOnline attribute, but when I tried to
update the score attribute, I've failed. The return value of the
setter is always true, but the score value is not updated. Could you
give any help?

@Override

public boolean setScore(String userName, int increment) {

PersistenceManager pm = PMF.get().getPersistenceManager();

Transaction tx = pm.currentTransaction();

User user;

boolean returnValue;

try {

tx.begin();

user = pm.getObjectById(User.class, userName);

//--detaching-attaching

pm.makePersistent(user);

User auxUser = (User) pm.detachCopy(user);

auxUser.setScore(increment);

pm.makePersistent(auxUser);

returnValue = true;

tx.commit();

//--detaching-attaching

} catch (NullPointerException ex) {

returnValue = false;

} catch (JDOObjectNotFoundException ex) {

user = null;

returnValue = false;

} finally {

if (tx.isActive()) {

tx.rollback();

}

pm.close();

}

return returnValue;

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