| Execute the action specified by the given callback object within a transaction.
Allows for returning a result object created within the transaction, that is,
a domain object or a collection of domain objects. A RuntimeException thrown
by the callback is treated as a fatal exception that enforces a rollback.
Such an exception gets propagated to the caller of the template.
Parameters:
action - the callback object that specifies the transactional action a result object returned by the callback, or null if none
throws:
TransactionException - in case of initialization, rollback, or system errors |