public void ProcessCurrentState(IDownloader downloader, IUploader uploader)
{
if (!_timersManager.CheckTimerTimeout(DISABLE_UPLOAD_TIMER_NAME))
{
_uploadEnabled = true;
}
if (_stream.IsInFaultState && !_stream.Reopen())
{
Thread.Sleep(_lowLevelSettings.ConnectionRetryTime);
return;
}
switch (_state)
{
case DataLinkStates.Upload:
try
{
_uploader.ExecuteUploadStep();
if (_uploader.Completed)
{
disableUpload(_lowLevelSettings.DelayUploadAfterUpload);
_state = DataLinkStates.Neutral;
raiseMessageUploadCompleted(new IOMessageEventArgs(_uploader.Message));
}
}
catch (DataLinkLayerException ex)
{
_log.LogError(ex.Message);
if (ex.InnerException is ContentionErrorException)
{
_downloader.Reset();
_state = DataLinkStates.Download;
}
else
{
disableUpload(_lowLevelSettings.DelayUploadAfterUploadError);
_state = DataLinkStates.Neutral;
raiseMessageUploadCompleted(new IOMessageEventArgs(_uploader.Message, ex));
}
}
break;
case DataLinkStates.Download:
try
{
_downloader.ExecuteDownloadStep();
if (_downloader.Completed)
{
disableUpload(_lowLevelSettings.DelayUploadAfterDownload);
_state = DataLinkStates.Neutral;
raiseMessageDownloadCompleted(new IOMessageEventArgs(_downloader.Message));
}
}
catch (TimeoutException)
{
// The Data Link in the neutral state
_state = DataLinkStates.Neutral;
}
catch (DataLinkLayerException ex)
{
_log.LogError(ex.Message);
_state = DataLinkStates.Neutral;
raiseMessageDownloadCompleted(new IOMessageEventArgs(_downloader.Message, ex));
}
break;
case DataLinkStates.Neutral:
if (_uploadQueue.Count > 0 && _uploadEnabled)
{
var message = "";
lock (_uploadQueue)
{
message = _uploadQueue.Dequeue();
}
_uploader.ResetAndUpload(message);
_state = DataLinkStates.Upload;
}
else
{
_downloader.Reset();
_state = DataLinkStates.Download;
}
break;
}
}