protected void DisposeSubmachines(bool emergencyQuit = false)
{
TransportOperationMachine beginPickup = null;
TransportOperationMachine endPickup = null;
TransportOperationMachine beginDropoff = null;
TransportOperationMachine endDropoff = null;
// Get local references so that the lock isn't held while operating on each machine.
lock (_subMachineLock)
{
beginPickup = BeginPickupMachine;
BeginPickupMachine = null;
endPickup = CompletePickupMachine;
CompletePickupMachine = null;
beginDropoff = BeginDropoffMachine;
BeginDropoffMachine = null;
endDropoff = CompleteDropoffMachine;
CompleteDropoffMachine = null;
}
DisposeSubmachine(beginPickup, emergencyQuit);
DisposeSubmachine(endPickup, emergencyQuit);
DisposeSubmachine(beginDropoff, emergencyQuit);
DisposeSubmachine(endDropoff, emergencyQuit);
}
private void Retry(TransportOperationMachine startingPoint)
{
LogService.Log(LogType.System, LogMessageType.Debug, GetType().Name,
string.Format(CultureInfo.InvariantCulture, "Retrying Tray move at '{0}'.", startingPoint.Station.Name));
NumberOfRetries--;
// Dispose of the old machines.
DisposeSubmachines();
// Create new first machine to execute.
InitializeSubmachine(startingPoint.Operation);
// Restart execution of whichever machine died, but don't raise the Started event.
switch (startingPoint.Operation)
{
case TransportOperation.BeginPickup:
BeginPickupMachine.Execute();
break;
case TransportOperation.CompletePickup:
CompletePickupMachine.Execute();
break;
case TransportOperation.BeginDropoff:
BeginDropoffMachine.Execute();
break;
case TransportOperation.CompleteDropoff:
CompleteDropoffMachine.Execute();
break;
}
}
private TransportOperationMachine CreateSubmachine(string name, IActivityMachineBuilder builder, DynamicConfiguration config)
{
var submachine = new TransportOperationMachine(name, _dispatcher);
submachine.Builder = builder;
submachine.Configuration = config;
submachine.Finished += HandleSubMachineFinished;
submachine.Interrupted += HandleSubMachineInterrupted;
submachine.Expired += HandleSubMachineExpired;
submachine.Faulted += HandleSubMachineFaulted;
return(submachine);
}
private void DisposeSubmachine(TransportOperationMachine submachine, bool emergencyQuit)
{
if (submachine != null)
{
submachine.Finished -= HandleSubMachineFinished;
submachine.Interrupted -= HandleSubMachineInterrupted;
submachine.Expired -= HandleSubMachineExpired;
submachine.Faulted -= HandleSubMachineFaulted;
if (emergencyQuit)
{
submachine.EmergencyQuit();
}
else
{
submachine.Quit();
}
}
}
private TransportOperationMachine GetNextOperation(TransportOperationMachine lastMachine, out TransportOperation nextOperation)
{
switch (lastMachine.Operation)
{
case TransportOperation.BeginPickup:
// Keep operating if mover was stopped for a tray abort because the tray has to be
// picked up anyway.
if (IsStopped && !lastMachine.Tray.IsAborted)
{
break;
}
InitializeSubmachine(TransportOperation.CompletePickup);
nextOperation = TransportOperation.CompletePickup;
return(CompletePickupMachine);
case TransportOperation.CompletePickup:
// Skip the drop-off if this mover was stopped.
if (IsStopped)
{
break;
}
InitializeSubmachine(TransportOperation.BeginDropoff);
nextOperation = TransportOperation.BeginDropoff;
return(BeginDropoffMachine);
case TransportOperation.BeginDropoff:
// Keep operating if mover was stopped for a tray abort because we don't know
// how much of the drop-off has run. CompleteDropoff can recover safely.
if (IsStopped && !lastMachine.Tray.IsAborted)
{
break;
}
InitializeSubmachine(TransportOperation.CompleteDropoff);
nextOperation = TransportOperation.CompleteDropoff;
return(CompleteDropoffMachine);
}
nextOperation = TransportOperation.BeginPickup;
return(null);
}
private void HandleSubMachineFinished(object sender, TimeStampedEventArgs e)
{
var doneMachine = sender as TransportOperationMachine;
TransportOperation nextOperation;
TransportOperationMachine nextMachine = null;
// lock here because the submachine references will be accessed.
lock (_subMachineLock)
{
nextMachine = GetNextOperation(doneMachine, out nextOperation);
if (doneMachine.Operation == TransportOperation.CompleteDropoff)
{
TeardownForFinished();
}
else
{
if (nextMachine != null && Transport.State.IsNoneOf(StationState.Stopped, StationState.Disabled) &&
!(Transport as IStation).HasErred)
{
CurrentOperation = nextOperation;
OnOperationBeginning(nextOperation);
// Last step, execute the next machine.
nextMachine.Execute();
}
else
{
TeardownForInterruption();
}
}
}
if (nextMachine == null && !_isComplete)
{
Quit();
LogService.Log(LogType.System, LogMessageType.Error, GetType().Name,
string.Format(CultureInfo.InvariantCulture, "Machine '{0}' failed due to missing {1} sub-machine.", Name, nextOperation.ToString()));
}
}
/// <summary>
/// Initialize one of the four transport operation machine types. Both Pick-up machines have
/// CanStop turned off because there are no circumstances where a Pick-up operation can be
/// stopped, even though the TrayMover as a whole can be stopped during pick-up. Both
/// Drop-off machines have CanStop turned on initially so that either drop-off operation can
/// be stopped. If this TrayMover has already been stopped, then this will also
/// stop a newly constructed CompleteDropoff machine before returning it.
/// </summary>
/// <param name="startingType"></param>
/// <returns>TransportOperationMachine</returns>
protected TransportOperationMachine InitializeSubmachine(TransportOperation startingType)
{
TransportOperationMachine initialized = null;
lock (_subMachineLock)
{
switch (startingType)
{
case TransportOperation.BeginPickup:
BeginPickupMachine = CreateSubmachine("BeginTrayPickup", BeginPickupBuilder, _beginPickupConfig);
initialized = BeginPickupMachine;
break;
case TransportOperation.CompletePickup:
CompletePickupMachine = CreateSubmachine("CompleteTrayPickup", CompletePickupBuilder, _completePickupConfig);
initialized = CompletePickupMachine;
break;
case TransportOperation.BeginDropoff:
BeginDropoffMachine = CreateSubmachine("BeginTrayDropoff", BeginDropoffBuilder, _beginDropoffConfig);
BeginDropoffMachine.CanStop = true;
initialized = BeginDropoffMachine;
break;
case TransportOperation.CompleteDropoff:
CompleteDropoffMachine = CreateSubmachine("CompleteTrayDropoff", CompleteDropoffBuilder, _completeDropoffConfig);
CompleteDropoffMachine.CanStop = true;
// CompleteDropoff needs to know if the mover was already stopped
if (IsStopped)
{
CompleteDropoffMachine.Stop();
}
initialized = CompleteDropoffMachine;
break;
}
}
return(initialized);
}
private void RaiseTransportationException(TransportOperationMachine machineInProgress, string description, Exception innerException = null)
{
// If transportation already in error state, just escape.
if ((Transport as IStation).HasErred)
{
return;
}
AtlasException ex;
if (!(machineInProgress.Station as IStation).HasErred && machineInProgress.IsExpired)
{
ex = new TrayMoveExpirationException(null, Transport, machineInProgress.Station.Name, machineInProgress.Operation.ToString());
}
else if (machineInProgress.HaltOnError)
{
// This will give transportation an error and a Busy ResourceAvailability.
ex = new TrayMoveComponentException(null, innerException, Transport, machineInProgress.Station.Name, machineInProgress.Operation.ToString());
}
else
{
ex = new TrayMoveInternalException(null, innerException, Transport, machineInProgress.Station.Name, machineInProgress.Operation.ToString(), description);
}
ex.Handle();
}
