@AT
class MyService
{
  @ServiceRequest
  @ATTriggers({ @ATTrigger(lifecycleEvent=ATLifecycleEvent.PRPEARE,
                             methodName="prpeareBooking")
                 @ATTrigger(lifecycleEvent=ATLifecycleEvent.COMMIT,
                             methodName="commitBooking")
                 @ATTrigger(lifecycleEvent=ATLifecycleEvent.ROLLBACK,
                             methodName="rollbackBooking") })
  int bookTicket(Customer customer, CreditCard card)

  void prpeareBooking() {...}
  void commitBooking() {...}
  void rollbackBooking() {...}
}