/// <summary>
/// Stellt den Empfang einer Quelle sicher.
/// </summary>
/// <param name="source">Die gewünschte Quelle.</param>
public void EnsureFeed(SourceSelection source)
{
// Unregister all outstanding requests
ResetFeeds();
// Stop current reader if active - and wait for cancel to finish
if (m_groupReader != null)
{
m_groupReader.Cancel();
m_groupReader.Wait();
}
// Create new
m_groupReader = ProviderDevice.Activate(source);
m_feeds = _NoFeeds;
// Start processing
m_feedAwaiter = m_groupReader.ContinueWith(task =>
{
// Load feed data
var sources = task.Result;
if (sources != null)
{
if (IsAllocated)
{
return(m_feeds = sources.Select(sourceOnGroup => new Feed(sourceOnGroup, this)).ToArray());
}
}
// None
return(null);
});
}
/// <summary>
/// Beendet die Nutzung dieses Senders.
/// </summary>
public void RefreshSourceInformation()
{
if (m_reader != null)
{
m_reader.Cancel();
m_reader.Wait();
}
m_reader = null;
}
public static void Stop(bool _applicationExiting = false)
{
applicationExiting = _applicationExiting;
if (!applicationExiting)
{
task.Stop();
}
else
{
task.Wait();
}
}
protected virtual void WaitForCancellation()
{
try
{
Logger.Debug <CancellableTaskExecutor>($"{nameof(CancellableTask)} cancelling");
CancellableTask.Wait();
Logger.Debug <CancellableTaskExecutor>($"{nameof(CancellableTask)} cancelled");
}
catch (AggregateException)
{
Logger.Trace <CancellableTaskExecutor>($"Handling {nameof(AggregateException)} thrown from {nameof(CancellableTask)}");
}
catch (Exception ex)
{
Logger.Error <CancellableTaskExecutor>(ex, $"Handling unexpected error: {ex.Message}");
}
}
protected virtual void Execute()
{
AppDomain.CurrentDomain.ProcessExit += OnProcessExit;
CancellableTask = Task.Run(() => Command(CancellationTokenSource.Token), CancellationTokenSource.Token);
CancellableTask.Wait(CancellationTokenSource.Token);
}
public void Wait()
{
scraperTask.Wait();
}