Designate a stateful session bean method to receive the before completion session synchronization callback.
 
The before completion callback notifies a stateful session bean instance that a transaction is about to be committed.
This method executes in the proper transaction context.
 Note: The instance may still cause the container to rollback the transaction by invoking the
 setRollbackOnly() method on the session context or by throwing an exception.
 A bean must have at most one BeforeCompletion method. The signature of this method must observe the
 following rules:
 
- The method must not be declared as 
finalorstatic. - The method may have any access type.
 - The return type must be 
void. - The method must take no arguments.
 
 A stateful session bean class may use either the SessionSynchronization interface or the session
 synchronization annotations, but not both.
- Since:
 - EJB 3.1
 - See Also: