private async Task RequestTerminationAsync(CancellationToken cancellation)
{
using (var resonseTableSlot = new ResponseTableSlot(this))
{
// Send termination message
await SendTerminateAsync(resonseTableSlot.SeqNum, cancellation);
// Wait for terminate ack
await Task.WhenAny(resonseTableSlot.Response, cancellation.AsTask());
}
}
private async Task <object> SendInternalAsync <TMessage>(TMessage message, CancellationToken cancellation)
{
ThrowIfDisposed();
await Initialization;
// Reserve a new slot in the response table.
using (var responseTableSlot = new ResponseTableSlot(this))
{
_logger?.LogInformation($"Sending message of type '{typeof(TMessage).FullName}' with seq-num '{responseTableSlot.SeqNum}'.");
cancellation.ThrowIfCancellationRequested();
try
{
// Serialize the message and send it.
await SendPayloadAsync(_serializer.Serialize(message, MessageEncoding.Bson), responseTableSlot.SeqNum, 0, MessageType.Message, MessageEncoding.Bson, cancellation);
}
catch (Exception exc) when(!(exc is ObjectDisposedException))
{
_logger?.LogError($"The message with the seq-num '{responseTableSlot.SeqNum}' could not be sent.", exc);
throw;
}
_logger?.LogInformation($"Sent message with seq-num '{responseTableSlot.SeqNum}'. Waiting for response.");
try
{
// Wait for a reponse fromthe remote end-point or cancellation alternatively.
await Task.WhenAny(responseTableSlot.Response, cancellation.AsTask());
}
catch (MessageHandlerNotFoundException)
{
_logger?.LogInformation($"The receiver cannot handle the message with seq-num '{responseTableSlot.SeqNum}'. No suitable message handler was found.");
throw;
}
catch (Exception exc) when(!(exc is OperationCanceledException))
{
_logger?.LogInformation($"Received response for the message with seq-num '{responseTableSlot.SeqNum}'.");
throw;
}
_logger?.LogInformation($"Received response for the message with seq-num '{responseTableSlot.SeqNum}'.");
return(await responseTableSlot.Response);
}
}
