public void Set(Container self, ref TrackableObjectMixIn <Container> mixIn, T value)
{
try
{
Tracker.OpenBatch();
if (accessor.IsVariable())
{
if (trackingData != null && !IsEqualToCached(value, null))
{
Tracker.logger?.Log(GetName(self), $"new and different value '{value}' set and we're a variable");
EnsureKnownAsStale(self);
// FIXME: to be optimized
accessor.Set(self, value);
trackingData.cachedValue = value;
EnsureKnownAsStable(self, isModified: true);
}
else
{
accessor.Set(self, value);
}
}
else
{
// We don't care about non-variable settings.
accessor.Set(self, value);
}
}
finally
{
Tracker.CloseBatch();
}
}
public T Get(Container self, ref TrackableObjectMixIn <Container> mixIn)
{
if (Tracker.AreEvaluating)
{
Tracker.NoteEvaluation(GetOurselvesAsDependency(self));
if (trackingData == null)
{
trackingData = new TrackingData <T>();
trackingData.haveModifiedDependencies = true;
}
}
if (trackingData != null)
{
if (NeedsUpdate)
{
using (Tracker.Batch())
Update(self, ref mixIn, "on value request during tracking evaluation");
}
return(GetCachedValue());
}
else
{
return(accessor.Get(self));
}
}
public void Update(Container self, ref TrackableObjectMixIn <Container> mixIn, String reason)
{
Tracker.EvaluationRecord record;
var previousValue = trackingData.cachedValue;
var previousException = trackingData.cachedException;
try
{
Tracker.OpenEvaluation(GetName(self), reason);
trackingData.cachedValue = accessor.Get(self);
trackingData.cachedException = null;
Tracker.logger?.Log(GetName(self), $"evaluation completed with value '{trackingData.cachedValue}'");
}
catch (Exception ex)
{
trackingData.cachedException = ex;
Tracker.logger?.Log(GetName(self), $"evaluation completed with exception '{trackingData.cachedException.Message}'");
}
finally
{
record = Tracker.CloseEvaluation();
}
RectifySubscriptions(self, record.dependencies);
trackingData.haveModifiedDependencies = false;
}
public void Subscribe(Container self, ref TrackableObjectMixIn <Container> mixIn, Subscriber subscriber)
{
if (trackingData == null)
{
trackingData = new TrackingData <T>();
Update(self, ref mixIn, $"on alert due to subscription by {subscriber.ToString()}");
}
trackingData.subscribers.Add(subscriber);
}
public void Unsubscribe(Container self, ref TrackableObjectMixIn <Container> mixIn, Subscriber subscriber)
{
// FIXME: This has to happen out-of-line, at the end of the omb.
trackingData.subscribers.Remove(subscriber);
if (trackingData.subscribers.Count == 0)
{
Tracker.logger?.Log(GetName(self), "scheduling for relaxation");
Tracker.ScheduleForRelaxation(self, accessor.GetIndex());
}
}
public void Notify(Container self, ref TrackableObjectMixIn <Container> mixIn, TrackingNotification notification)
{
if (trackingData == null)
{
throw new Exception($"Expected {nameof(trackingData)} to be non-null.");
}
switch (notification)
{
case TrackingNotification.Stale:
if (trackingData.staleDependencies++ == 0)
{
EnsureKnownAsStale(self);
}
break;
case TrackingNotification.ReadyUnmodified:
if (--trackingData.staleDependencies == 0)
{
HandleDependenciesStabilized(self);
EnsureKnownAsStable(self, false);
}
break;
case TrackingNotification.ReadyModified:
trackingData.haveModifiedDependencies = true;
if (--trackingData.staleDependencies == 0)
{
HandleDependenciesStabilized(self);
EnsureKnownAsStable(self, true);
}
break;
case TrackingNotification.RelaxIfAppropriate:
RelaxIfAppropriate(self);
break;
default:
throw new Exception($"Unknown notification {notification}.");
}
}
