Actually I've post this topic in another forum (database-
persistance) because at first I thought this has something to
do with dbase, but lately I found it's not, so I move/repost
this topic in this forum.
I create a session bean (stetaful), open connection in create() and
acvitivate(), close connection to dbase on remove() and passivate().
Problem is if <trans-attribute> in ejb-jar.xml is Required or
RequiresNew, each time a client (swing applicatioon) call remove(),
will produce errors.
However, if I change <trans-attribute> in ejb-jar.xml to Never or
Supports for that stateful-bean, invocation of con.close()
in ejbRemove() success.
So far, I understand that if I use trans-attribute Never, the
stateful-bean will execute method without transaction
even if the client is in transaction context. For Supports,
if client is in transaction context, statefull will also in transaction
context, and if client isn't in transaction context, stateful
bean execute without transaction. Since my client is a swing app,
I believe that with <trans-attribute> Never or Supports,
my sesion-bean will not executed in transaction mode if called by
the siwng client.
It seems that if stateful-bean is in transaction context, invocation of con.close()
will fail, but why? Could somebody please enlight me?
