private async Task handleMessage(IMessageSession session, Message message, CancellationToken token)
{
var lockToken = message.SystemProperties.LockToken;
Envelope envelope;
try
{
envelope = _protocol.ReadEnvelope(message);
}
catch (Exception e)
{
_logger.LogException(e,
message:
"Error trying to map an incoming Azure Service Bus message to an Envelope. See the Dead Letter Queue");
await session.DeadLetterAsync(lockToken, "Bad Envelope", e.ToString());
return;
}
try
{
await _callback.Received(Address, new[] { envelope });
await session.CompleteAsync(lockToken);
}
catch (Exception e)
{
_logger.LogException(e, envelope.Id, "Error trying to receive a message from " + Address);
await session.AbandonAsync(lockToken);
}
}
private static async Task receive(Stream stream, IReceiverCallback callback, Envelope[] messages, Uri uri)
{
var status = callback.Received(uri, messages);
switch (status)
{
case ReceivedStatus.ProcessFailure:
await stream.SendBuffer(Constants.ProcessingFailureBuffer);
break;
case ReceivedStatus.QueueDoesNotExist:
await stream.SendBuffer(Constants.QueueDoesNotExistBuffer);
break;
default:
await stream.SendBuffer(Constants.ReceivedBuffer);
var ack = await stream.ReadExpectedBuffer(Constants.AcknowledgedBuffer);
if (ack)
{
callback.Acknowledged(messages);
}
else
{
callback.NotAcknowledged(messages);
}
break;
}
}
private static async Task receive(Stream stream, IReceiverCallback callback, Envelope[] messages, Uri uri)
{
// Just a ping
if (messages.Any() && messages.First().IsPing())
{
await stream.SendBuffer(ReceivedBuffer);
// We aren't gonna use this in this case
var ack = await stream.ReadExpectedBuffer(AcknowledgedBuffer);
return;
}
var status = await callback.Received(uri, messages);
switch (status)
{
case ReceivedStatus.ProcessFailure:
await stream.SendBuffer(ProcessingFailureBuffer);
break;
case ReceivedStatus.QueueDoesNotExist:
await stream.SendBuffer(QueueDoesNotExistBuffer);
break;
default:
await stream.SendBuffer(ReceivedBuffer);
var ack = await stream.ReadExpectedBuffer(AcknowledgedBuffer);
if (ack)
{
await callback.Acknowledged(messages);
}
else
{
await callback.NotAcknowledged(messages);
}
break;
}
}
