How can i use serializable transactions on JEE 6?

Question

I am learning the new annotations for transaction management, like @TransactionAttribute(TransactionAttributeType.REQUIRES_NEW), but i could not find out how to create a transaction with SERIALIZABLE isolation. Is this possible on a per-method basis or i have to set it on the connection for the whole application?

Answer 1

Generally transaction isolation level is set on Connection, per application.

However, e.g. in Spring on Weblogic server, you can set isolation level per transaction. See here, point 9.8.1.

Answer 2

Is this possible on a per-method basis or i have to set it on the connection for the whole application?

This is not possible in a standardized way, this is not covered by the EJB specification.

But some containers do offer support for this as mentioned in How can I set isolation levels per method in EJB 3.