Hi,
I just wanted to know, what the default locking strategy in JBoss is.
Am I right, that when I do a EJBQL/JBossQL/DeclaredSQL finder, the
returned database entries are locked for reading until the transaction
is finished?
Why this is important to know for me:
I have a table that represents 'ressources' that can be used. Let's assume
one thread wants to have one and calls the finder. The finder returnes one
ressource table entry of e.g. 5 available.
Now, if another thread also wants a ressource and therefore calls the
finder -- will it find the same ressource again? Or does JBoss lock this
entry in a way that the second thread gets one of the 4 remaining
ressources?
How about race conditions when both thread try to run the finder at the
same time?
Can anyone help me out here? I just want to make sure my application
is thread safe :-) Thanks!
-Danny
