public void Unload(Voyage.IVoyage voyage, DateTime date) { // Thread safe, lock free sincronization CargoState stateBeforeTransition; CargoState previousState = CurrentState; do { stateBeforeTransition = previousState; CargoState newValue = stateBeforeTransition.Unload(voyage, date); previousState = Interlocked.CompareExchange <CargoState>(ref this.CurrentState, newValue, stateBeforeTransition); }while (previousState != stateBeforeTransition); if (!previousState.Equals(this.CurrentState)) { HandlingEventArgs args = new HandlingEventArgs(CurrentState, CurrentState.CalculationDate); EventHandler <HandlingEventArgs> handler = Unloaded; if (null != handler) { handler(this, args); } } }
public abstract CargoState Unload(Voyage.IVoyage voyage, DateTime date);
public abstract CargoState LoadOn(Voyage.IVoyage voyage, DateTime date);