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);
