internal static SourceState GetSourceState(string fullyQualifiedReference)
{
SourceState sourceState = GetSourceStateFromCache(fullyQualifiedReference);
if (sourceState == null)
{
// Create the source.
sourceState = CreateSourceState(fullyQualifiedReference);
// Cache it so that next time it is available.
Lock.AcquireWriterLock(Timeout.Infinite);
try
{
SourceStates[fullyQualifiedReference] = sourceState;
}
finally
{
Lock.ReleaseWriterLock();
}
}
return(sourceState);
}
internal static void SourceDeleted(string fullyQualifiedReference)
{
SourceState sourceState = GetSourceStateFromCache(fullyQualifiedReference);
if (sourceState == null)
{
return; // Not cached, so nothing to update.
}
// Set the cached SourceState properties to the default values.
sourceState.SetMessageHandler(CreateMessageHandler(fullyQualifiedReference));
sourceState.SetEventStatus(_defaultEventStatus);
}
internal static void SourceCreated(string fullyQualifiedReference)
{
SourceState sourceState = GetSourceStateFromCache(fullyQualifiedReference);
if (sourceState == null)
{
return; // Not cached, so nothing to update.
}
// Update the cached SourceState properties from the catalogue (do not create a new SourceState
// object, since user code may already hold references to it via EventSources).
Source source = _catalogue.GetSearcher().GetSource(fullyQualifiedReference);
if (source == null)
{
return; // Strange - the Source must have been created and immediately deleted.
}
// Update the Message Handler and event status.
sourceState.SetMessageHandler(CreateMessageHandler(fullyQualifiedReference));
sourceState.SetEventStatus(CreateEventStatus(source.GetEffectiveEnabledEvents()));
}
internal static void UpdateSource(string fullyQualifiedReference)
{
Debug.Assert(!string.IsNullOrEmpty(fullyQualifiedReference),
"fullyQualifiedReference != null && fullyQualifiedReference.Length > 0");
// Find the SourceState object for this Source. The existing object must be updated (it cannot be
// overwritten), because user code may already hold a reference to it via an EventSource.
SourceState sourceState = GetSourceStateFromCache(fullyQualifiedReference);
if (sourceState == null)
{
return; // This Source hasn't been created - nothing to update.
}
// Find the Source in the Catalogue.
var source = _catalogue.GetSearcher().GetSource(fullyQualifiedReference);
BitArray eventStatus = source == null ? _defaultEventStatus : CreateEventStatus(source.GetEffectiveEnabledEvents());
sourceState.SetEventStatus(eventStatus);
}
