public GetEnvelopeResult TryGetMessage()
{
FileInfo message;
try
{
message = _queue.EnumerateFiles().FirstOrDefault();
}
catch (Exception ex)
{
SystemObserver.Notify(new FailedToReadMessage(ex, _queueName));
return(GetEnvelopeResult.Error());
}
if (null == message)
{
return(GetEnvelopeResult.Empty);
}
try
{
var buffer = File.ReadAllBytes(message.FullName);
var unpacked = new MessageTransportContext(message, buffer, _queueName);
return(GetEnvelopeResult.Success(unpacked));
}
catch (IOException ex)
{
// this is probably sharing violation, no need to
// scare people.
if (!IsSharingViolation(ex))
{
SystemObserver.Notify(new FailedToAccessStorage(ex, _queue.Name, message.Name));
}
return(GetEnvelopeResult.Retry);
}
catch (Exception ex)
{
SystemObserver.Notify(new MessageInboxFailed(ex, _queue.Name, message.FullName));
// new poison details
return(GetEnvelopeResult.Retry);
}
}
public GetEnvelopeResult TryGetMessage()
{
CloudQueueMessage message;
try
{
message = _queue.GetMessage(_visibilityTimeout);
}
catch (ThreadAbortException)
{
// we are stopping
return(GetEnvelopeResult.Empty);
}
catch (Exception ex)
{
SystemObserver.Notify(new FailedToReadMessage(ex, _queueName));
return(GetEnvelopeResult.Error());
}
if (null == message)
{
return(GetEnvelopeResult.Empty);
}
try
{
var unpacked = DownloadPackage(message);
return(GetEnvelopeResult.Success(unpacked));
}
catch (StorageClientException ex)
{
SystemObserver.Notify(new FailedToAccessStorage(ex, _queue.Name, message.Id));
return(GetEnvelopeResult.Retry);
}
catch (Exception ex)
{
SystemObserver.Notify(new MessageInboxFailed(ex, _queue.Name, message.Id));
// new poison details
_posionQueue.Value.AddMessage(message);
_queue.DeleteMessage(message);
return(GetEnvelopeResult.Retry);
}
}