protected override void Dispose(bool disposing)
{
if (disposing)
{
_versions = QueryDataVersions.Empty;
_processingBlock.Complete();
}
}
public void UpdateVersions(ImmutableDictionary <string, long> versions)
{
lock (SyncObject)
{
_versions = QueryDataVersions.Empty.AddRange(versions);
PostVersionUpdate();
}
}
private void PostVersionUpdate()
{
lock (SyncObject)
{
if (IsInitialized)
{
_processingBlock.Post(() =>
{
ImmutableHashSet <IObserver <QueryDataSourceChangeNotification> > observers;
QueryDataVersions newVersions;
lock (SyncObject)
{
if (_latestPostedVersions == _versions)
{
return;
}
observers = _observers;
newVersions = _versions;
_processedNotificationCount++;
}
if (observers.Count == 0)
{
return;
}
List <string>?expiredSources = null;
foreach (string versionKey in _latestPostedVersions.Keys)
{
if (!newVersions.ContainsKey(versionKey))
{
expiredSources ??= new List <string>();
expiredSources.Add(versionKey);
}
}
_latestPostedVersions = newVersions;
QueryDataSourceChangeNotification notification = new(newVersions, expiredSources?.ToImmutableArray());
foreach (IObserver <QueryDataSourceChangeNotification> observer in observers)
{
observer.OnNext(notification);
}
});
}
}
}
