public void ProcessQueuedShipment()
{
try
{
if (_queueShipment.Count() > 0)
{
while (_queueShipment.Count() > 0)
{
Shipment shipment = _queueShipment.Dequeue();
var station = LookupCache.GetInstance().GetStation(shipment.SourceStation.StationId);
station.DeliverShipmentToStation(shipment);
StationShipmentEventArgs args = new StationShipmentEventArgs(shipment.SourceStation.StationId, shipment.DestinationStation.StationId);
args.Message = shipment + " Shipment queued at " + shipment.SourceStation;
args.DeliveredShipment = shipment;
OnShipmentQueued(this, args);
}
}
_queueShipmentSynchronizer.WaitOne();
ProcessQueuedShipment();
}
catch (Exception)
{
throw;
}
}
private void QueueArrivedShipment(object sender, StationShipmentEventArgs eventArgs)
{
try
{
Station sourceStation = LookupCache.GetInstance().GetStation(eventArgs.SourceStationNumber);
Station destinationStation = LookupCache.GetInstance().GetStation(eventArgs.DestinationStationNumber);
Shipment shipment = new Shipment(sourceStation, destinationStation);
_queueShipment.Enqueue(shipment);
_queueShipmentSynchronizer.Set();
}
catch (Exception)
{
throw;
}
}
public void Start()
{
Random randomStationNumberGenerator = new Random();
// Start trains at random stations
foreach (var train in LookupCache.GetInstance().GetTrains())
{
int stationId = randomStationNumberGenerator.Next(1, LookupCache.GetInstance().StationCount() + 1);
TrainTrack trainTrack = LookupCache.GetInstance().GetNextTrack(stationId);
TrainCurrentLocation trainCurrentLocation = new TrainCurrentLocation();
trainCurrentLocation.Train = train;
trainCurrentLocation.Track = trainTrack;
trainCurrentLocation.DistanceLeft = trainCurrentLocation.Track.TrackLength;
trainCurrentLocation.Train.CurrentRunningStatus = TrainRunningStatus.Waiting;
_lstTrainsToStart.Add(trainCurrentLocation);
}
}
private void ProcessShipmentAtStation()
{
_signalEvent.WaitOne();
// Process Running Trains
List <TrainCurrentLocation> lstToMovetoUnLoadingQueue = new List <TrainCurrentLocation>();
foreach (var train in _dicTrainCurrentLocations.Keys)
{
var trainCurrentLocation = _dicTrainCurrentLocations[train];
if (train.CurrentRunningStatus == TrainRunningStatus.Running && trainCurrentLocation.DistanceLeft <= 0)
{
lstToMovetoUnLoadingQueue.Add(trainCurrentLocation);
}
else if (train.CurrentRunningStatus == TrainRunningStatus.Running)
{
trainCurrentLocation.DistanceLeft -= train.SpeedFactor;
if (trainCurrentLocation.DistanceLeft <= 0)
{
trainCurrentLocation.DistanceLeft = 0;
}
else
{
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = trainCurrentLocation.Train + " has to travel distance : " + trainCurrentLocation.DistanceLeft;
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainProgressed(this, args);
}
}
}
List <TrainCurrentLocation> lstToAddToLoadingTrainsQueue = new List <TrainCurrentLocation>();
// Unloading shipment
foreach (var trainCurrentLocation in _lstOfTrainsForUnloading)
{
if (trainCurrentLocation.Train.IsAnyShipmentForStation(trainCurrentLocation.Track.DestinationStationId))
{
var shipment = trainCurrentLocation.Train.UnloadShipment(trainCurrentLocation.Track.DestinationStationId);
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = "<<" + shipment + " shipment unloaded at " + shipment.DestinationStation;
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
args.DeliveredShipment = shipment;
OnTrainShipmentUnloadEvent(this, args);
}
else
{
trainCurrentLocation.Train.CurrentRunningStatus = TrainRunningStatus.LoadingShipment;
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = "There is no shipment to unload at Station" + trainCurrentLocation.Track.DestinationStationId;
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainOtherEvent(this, args);
lstToAddToLoadingTrainsQueue.Add(trainCurrentLocation);
}
}
List <TrainCurrentLocation> lstToAddToWaitingTrainsQueue = new List <TrainCurrentLocation>();
// loading shipment
foreach (var trainCurrentLocation in _lstOfTrainsForLoading)
{
Station station = LookupCache.GetInstance().GetStation(trainCurrentLocation.Track.DestinationStationId);
if (!station.IsStationShipmentEmpty() && !trainCurrentLocation.Train.IsShipmentCapacityFull())
{
Shipment shipment = station.DeliverShipmentToTrain();
trainCurrentLocation.Train.LoadShipment(shipment);
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = ">> " + shipment + " loaded from " + shipment.DestinationStation;
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
args.DeliveredShipment = shipment;
OnTrainShipmentLoadEvent(this, args);
}
else if (station.IsStationShipmentEmpty())
{
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = station + " has no items to load into train";
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainOtherEvent(this, args);
lstToAddToWaitingTrainsQueue.Add(trainCurrentLocation);
trainCurrentLocation.Train.CurrentRunningStatus = TrainRunningStatus.Stopped;
}
else if (trainCurrentLocation.Train.IsShipmentCapacityFull())
{
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = "Train shipment capacity is full now.";
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainOtherEvent(this, args);
lstToAddToWaitingTrainsQueue.Add(trainCurrentLocation);
trainCurrentLocation.Train.CurrentRunningStatus = TrainRunningStatus.Stopped;
}
}
List <TrainCurrentLocation> _listToRemoveFromWaiting = new List <TrainCurrentLocation>();
// check track token to start.
foreach (var trainCurrentLocation in _lstTrainsToStart)
{
if (trainCurrentLocation.Train.CurrentRunningStatus == TrainRunningStatus.Stopped)
{
var track = LookupCache.GetInstance().GetNextTrack(trainCurrentLocation.Track.DestinationStationId);
trainCurrentLocation.Track = track;
trainCurrentLocation.DistanceLeft = trainCurrentLocation.Track.TrackLength;
trainCurrentLocation.Train.CurrentRunningStatus = TrainRunningStatus.Waiting;
}
if (trainCurrentLocation.Train.CurrentRunningStatus == TrainRunningStatus.Waiting)
{
if (TrackTokenController.GetInstance().CheckTrackTokenAvailability(trainCurrentLocation.Track.SourceStationId, trainCurrentLocation.Track.DestinationStationId))
{
TrackTokenController.GetInstance().AcquireTrackToken(trainCurrentLocation.Track.SourceStationId, trainCurrentLocation.Track.DestinationStationId,
trainCurrentLocation.Train.TrainId);
trainCurrentLocation.Train.CurrentRunningStatus = TrainRunningStatus.Running;
_dicTrainCurrentLocations.Add(trainCurrentLocation.Train, trainCurrentLocation);
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = "Train departured from Station" + trainCurrentLocation.Track.SourceStationId;
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainOtherEvent(this, args);
_listToRemoveFromWaiting.Add(trainCurrentLocation);
}
else
{
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.Message = "Train waiting for track " + trainCurrentLocation.Track + " to be free.";
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainOtherEvent(this, args);
}
}
}
// Remove from waiting list.
foreach (var train in _listToRemoveFromWaiting)
{
if (_lstTrainsToStart.Contains(train))
{
_lstTrainsToStart.Remove(train);
}
}
// Move from running to unloading
foreach (var trainCurrentLocation in lstToMovetoUnLoadingQueue)
{
if (_dicTrainCurrentLocations.ContainsKey(trainCurrentLocation.Train))
{
TrackTokenController.GetInstance().ReleaseTrackToken(trainCurrentLocation.Track.SourceStationId, trainCurrentLocation.Track.DestinationStationId);
_dicTrainCurrentLocations.Remove(trainCurrentLocation.Train);
_lstOfTrainsForUnloading.Add(trainCurrentLocation);
TrainProcessEventArgs args = new TrainProcessEventArgs();
args.TrainId = trainCurrentLocation.Train.ToString();
args.TrackId = trainCurrentLocation.Track.ToString();
OnTrainArrivedAtStation(this, args);
}
}
// Move from unloading to loading
foreach (var trainCurrentLocation in lstToAddToLoadingTrainsQueue)
{
if (_lstOfTrainsForUnloading.Contains(trainCurrentLocation))
{
_lstOfTrainsForUnloading.Remove(trainCurrentLocation);
_lstOfTrainsForLoading.Add(trainCurrentLocation);
}
}
// Move from loading to waiting
foreach (var trainCurrentLocation in lstToAddToWaitingTrainsQueue)
{
if (_lstOfTrainsForLoading.Contains(trainCurrentLocation))
{
_lstOfTrainsForLoading.Remove(trainCurrentLocation);
_lstTrainsToStart.Add(trainCurrentLocation);
}
}
ProcessShipmentAtStation();
}
