public CompetitionClassModel ReplaceModel([NotNull] CompetitionClassModel replacementVersion,
[NotNull] CompetitionClassModel originalVersion)
{
Guard.NotNull(replacementVersion, nameof(replacementVersion));
Guard.NotNull(originalVersion, nameof(originalVersion));
using (var lockTracker = new LockTracker(Log, MethodBase.GetCurrentMethod()))
{
lock (stateLock)
{
lockTracker.Acquired();
if (originalVersion != activeModel.Value)
{
// Should never get here.
throw new OptimisticConcurrencyException("Unexpected model update from multiple threads.");
}
try
{
serializer.Save(replacementVersion);
}
catch (Exception ex)
{
Log.Error("Failed to save in-memory model to disk.", ex);
}
activeModel.Value = replacementVersion;
return replacementVersion;
}
}
}
private void ExecuteExclusiveIfStateIn([NotNull] ICollection<CompetitionClassState> statesAllowed,
[NotNull] Action action)
{
using (var lockTracker = new LockTracker(Log, MethodBase.GetCurrentMethod()))
{
lock (stateLock)
{
lockTracker.Acquired();
if (statesAllowed.Contains(classState))
{
action();
}
else
{
string statesList = string.Join(", ", statesAllowed.Select(s => s.ToString()));
Log.Debug(
$"Discarding operation, because current state {classState} is not in allowed set ({statesList}).");
}
}
}
}
public void Reset()
{
// Note: Intentionally not raising any events here, because caller wants to
// combine multiple changes in single network packet (performance optimization).
StopMonitorCourseTime();
using (var lockTracker = new LockTracker(Log, MethodBase.GetCurrentMethod()))
{
lock (stateLock)
{
lockTracker.Acquired();
maximumCourseTimeElapsed = false;
isManuallyEliminated = false;
refusalCount = 0;
}
}
}
private void RaiseEventsOnChangeWithLock([NotNull] Action action)
{
EliminationEventArgs argsForEliminationChanged;
EventArgs<int> argsForRefusalCountChanged;
using (var lockTracker = new LockTracker(Log, MethodBase.GetCurrentMethod()))
{
lock (stateLock)
{
lockTracker.Acquired();
bool beforeIsEliminated = UnsafeIsEliminated;
int beforeRefusalCount = refusalCount;
action();
argsForEliminationChanged = UnsafeIsEliminated != beforeIsEliminated
? new EliminationEventArgs(UnsafeIsEliminated)
: null;
argsForRefusalCountChanged = refusalCount != beforeRefusalCount
? new EventArgs<int>(refusalCount)
: null;
}
}
if (argsForEliminationChanged != null)
{
EliminationChanged?.Invoke(this, argsForEliminationChanged);
}
if (argsForRefusalCountChanged != null)
{
RefusalCountChanged?.Invoke(this, argsForRefusalCountChanged);
}
}
private void ExclusiveUpdateWithRaiseEvent(bool forceChanged,
[NotNull] Func<NetworkHealthReport, NetworkHealthReport> updateCallback)
{
EventArgs<NetworkHealthReport> eventArgs;
// Must lock despite of FreshReference, to prevent concurrent calls overwriting each others changes.
using (var lockTracker = new LockTracker(Log, MethodBase.GetCurrentMethod()))
{
lock (StateLock)
{
lockTracker.Acquired();
NetworkHealthReport newReport = updateCallback(previousReport.Value);
bool hasChanged = forceChanged || newReport != previousReport.Value;
previousReport.Value = newReport;
eventArgs = hasChanged ? new EventArgs<NetworkHealthReport>(newReport) : null;
}
}
if (eventArgs != null)
{
Log.Info($"Network health has changed - {eventArgs.Argument}");
HealthChanged?.Invoke(this, eventArgs);
}
}