private static bool PushIfCompatibleType(
ILazyMessageStreamEnumerable lazyStream,
int messageId,
TMessage message,
CancellationToken cancellationToken,
out Task messageProcessingTask)
{
if (message == null)
{
messageProcessingTask = Task.CompletedTask;
return(false);
}
if (lazyStream.MessageType.IsInstanceOfType(message))
{
var pushedMessage = new PushedMessage(messageId, message, message);
messageProcessingTask = lazyStream.GetOrCreateStream().PushAsync(pushedMessage, cancellationToken);
return(true);
}
var envelope = message as IEnvelope;
if (envelope?.Message != null && envelope.AutoUnwrap &&
lazyStream.MessageType.IsInstanceOfType(envelope.Message))
{
var pushedMessage = new PushedMessage(messageId, envelope.Message, message);
messageProcessingTask = lazyStream.GetOrCreateStream().PushAsync(pushedMessage, cancellationToken);
return(true);
}
messageProcessingTask = Task.CompletedTask;
return(false);
}
public async Task PushAsync(PushedMessage pushedMessage, CancellationToken cancellationToken = default)
{
Check.NotNull(pushedMessage, nameof(pushedMessage));
using var linkedTokenSource = LinkWithAbortCancellationTokenSource(cancellationToken);
await _writeSemaphore.WaitAsync(linkedTokenSource.Token).ConfigureAwait(false);
if (_isComplete)
{
throw new InvalidOperationException($"The stream has been marked as complete.");
}
_current = pushedMessage;
SafelyRelease(_readSemaphore);
await _processedSemaphore.WaitAsync(linkedTokenSource.Token).ConfigureAwait(false);
_writeSemaphore.Release();
}