public async Task StopAsync(CancellationToken cancellationToken)
{
ThrowIfDisposed();
if (!_started)
{
throw new InvalidOperationException("The listener has not yet been started or has already been stopped.");
}
// cancel our token source to signal any in progress
// ProcessMessageAsync invocations to cancel
_cancellationTokenSource.Cancel();
if (_receiver != null && _receiver.IsValueCreated)
{
await Receiver.CloseAsync();
_receiver = CreateMessageReceiver();
}
if (_clientEntity != null)
{
await _clientEntity.CloseAsync();
_clientEntity = null;
}
_started = false;
}
public void Dispose()
{
if (!_disposed)
{
// Running callers might still be using the cancellation token.
// Mark it canceled but don't dispose of the source while the callers are running.
// Otherwise, callers would receive ObjectDisposedException when calling token.Register.
// For now, rely on finalization to clean up _cancellationTokenSource's wait handle (if allocated).
_cancellationTokenSource.Cancel();
if (_receiver != null && _receiver.IsValueCreated)
{
Receiver.CloseAsync().Wait();
_receiver = null;
}
if (_sessionClient != null && _sessionClient.IsValueCreated)
{
_sessionClient.Value.CloseAsync().Wait();
_sessionClient = null;
}
if (_clientEntity != null)
{
_clientEntity.CloseAsync().Wait();
_clientEntity = null;
}
_stopAsyncSemaphore.Dispose();
_cancellationTokenSource.Dispose();
_disposed = true;
}
}