You cannot simply call makePersistent, you have to start a transaction
first (this is unrelated to whether you're using it with EJB or not):
Transaction tx = null;
try
{
tx = manager.currentTransaction();
tx.begin();
manager.makePersistent(user);
tx.commit();
}
catch (Exception e)
{
if (tx.isActive())
{
tx.rollback();
}
}
Have a look here for an example of using JDO:
http://www.onjava.com/pub/a/onjava/excerpt/chap_07/index2.html
Btw, please post questions like these to the user list, not the dev
list, so that other users can help you or learn something from it.
Tom
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