public IEnumerable <(string trainId, int sectionId, DateTime start, DateTime end)> TryAdd(string resId, string trainId, int sequenceNumber, DateTime entry, DateTime exit)
{
if (!_container.ContainsKey(resId))
{
_container.Add(resId, new Dictionary <string, Dictionary <int, Tuple <DateTime, DateTime> > >());
}
if (!_container[resId].ContainsKey(trainId))
{
_container[resId].Add(trainId, new Dictionary <int, Tuple <DateTime, DateTime> >());
}
// Look for conflicts
foreach (var collection in _container[resId].Where(kvp => kvp.Key != trainId))
{
foreach (var keyVal in collection.Value)
{
if (Math.Intersect(entry, exit, keyVal.Value.Item1, keyVal.Value.Item2))
{
yield return(collection.Key, keyVal.Key, keyVal.Value.Item1, keyVal.Value.Item2); // Means this period intersect an existing one
}
}
}
_container[resId][trainId][sequenceNumber] = new Tuple <DateTime, DateTime>(entry, exit);
}
public static int ScheduleTrains(ProblemInstance problem, IEnumerable <TrainRun> trainRuns)
{
var nbConflicts = 0;
var usedResources = new UsedResourceCollection();
foreach (var trainRun in trainRuns)
{
// ----------------------------------------------------
//Log($"Delay train {trainRun.ServiceIntentionId} start ? ", Utils.Logging.LogEventArgs.MessageType.Info, false);
var delay = TimeSpan.Zero;
var initialRunSection = trainRun.TrainRunSections[0];
var initialSection = problem.TryGetRouteSection(initialRunSection.Key);
foreach (var resId in initialSection.ResourceIds)
{
var resource = problem.TryGetResource(resId);
if (resource != null)
{
foreach (var usage in usedResources.UsageByOtherThan(resId, trainRun.ServiceIntentionId))
{
if (Math.Intersect(initialRunSection.EntryTime, initialRunSection.ExitTime + resource.ReleaseTime, usage.Item3, usage.Item4))
{
delay = Math.Max(delay, usage.Item4 - initialRunSection.EntryTime);
}
}
}
}
// Postpone train departure
if (delay > TimeSpan.Zero)
{
++nbConflicts;
//Log($"Yes. Delay is {delay}");
initialRunSection.EntryTime += delay;
trainRun.ApplyDelay(delay);
}
//Log($"Check other sections for delays ... ");
for (int k = 1; k < trainRun.TrainRunSections.Count; ++k)
{
var runSection = trainRun.TrainRunSections[k];
var section = problem.TryGetRouteSection(runSection.Key);
// Check resource occupation for next section
delay = TimeSpan.Zero;
foreach (var resId in section.ResourceIds)
{
var resource = problem.TryGetResource(resId);
if (resource != null)
{
foreach (var usage in usedResources.UsageByOtherThan(resId, trainRun.ServiceIntentionId))
{
if (Math.Intersect(runSection.EntryTime, runSection.ExitTime + resource.ReleaseTime, usage.Item3, usage.Item4))
{
delay = Math.Max(delay, usage.Item4 - runSection.EntryTime);
}
}
}
}
if (delay > TimeSpan.Zero)
{
++nbConflicts;
//Log($"Delay exit of train {trainRun.ServiceIntentionId}, from section {k-1} by {delay}");
trainRun.ApplyDelay(delay, k - 1);
}
}
// ----------------------------------------------------
//Log($"Add current train resource occupation ... ");
foreach (var runSection in trainRun.TrainRunSections)
{
var section = problem.TryGetRouteSection(runSection.Key);
foreach (var resId in section.ResourceIds)
{
var resource = problem.TryGetResource(resId);
if (resource != null)
{
usedResources.Add(resId, trainRun.ServiceIntentionId, runSection.SequenceNumber,
runSection.EntryTime, runSection.ExitTime + resource.ReleaseTime);
}
}
}
}
return(nbConflicts);
}