public override void Run()
{
while (!_isStopped)
{
try
{
// get a list of videos whose status is "processing"
var videos = _repository.GetVideos(VideoStatus.Processing);
// check the status of each video
foreach (var video in videos)
{
VideoStatus? newVideoStatus = null;
var job = _mediaServices.GetJob(video.MediaServicesJobID);
Trace.WriteLine(string.Format(string.Format("VideoID {0}: Job state is '{1}'",
video.VideoID, job.State.ToString())));
switch (job.State)
{
case JobState.Canceled:
case JobState.Canceling:
newVideoStatus = VideoStatus.ProcessingCancelled;
break;
case JobState.Error:
newVideoStatus = VideoStatus.ProcessingFailed;
break;
case JobState.Finished:
newVideoStatus = VideoStatus.Processed;
break;
case JobState.Processing:
case JobState.Queued:
case JobState.Scheduled:
// nothing to update at this time
break;
}
if (newVideoStatus != null)
{
Trace.WriteLine(string.Format(string.Format("VideoID {0}: Has a new status of '{1}'",
video.VideoID, newVideoStatus.Value.ToString())));
// update the video's status
video.VideoStatusEnum = newVideoStatus.Value;
// if the video has been processed then add the video assets
if (video.VideoStatusEnum == VideoStatus.Processed)
{
foreach (var asset in job.OutputMediaAssets)
{
var videoAsset = new VideoAsset()
{
VideoID = video.VideoID,
MediaServicesAssetID = asset.Id,
FileTypeEnum = GetAssetFileType(asset)
};
video.Assets.Add(videoAsset);
Trace.WriteLine(string.Format("VideoID {0}: Added video asset (AssetID: {1}, FileType: {2})",
video.VideoID, videoAsset.MediaServicesAssetID, videoAsset.FileTypeEnum.ToString()));
}
}
// update the video
_repository.InsertOrUpdateVideo(video);
}
}
// receive and process all pending messages
var queueHasMessages = true;
while (queueHasMessages)
{
BrokeredMessage receivedMessage = null;
receivedMessage = _queueClient.Receive();
if (receivedMessage != null)
{
Trace.WriteLine("Processing message...", receivedMessage.SequenceNumber.ToString());
// get the video
var videoID = receivedMessage.GetBody<int>();
var video = _repository.GetVideo(videoID);
if (video != null)
{
Trace.WriteLine(string.Format("VideoID {0}: Creating encoding job...", video.VideoID));
// create the encoding job
var jobID = _mediaServices.CreateEncodingJob(string.Format("VideoID_{0}", video.VideoID), video.FileName);
// update the video's job ID and set its status to "processing"
video.MediaServicesJobID = jobID;
video.VideoStatusEnum = VideoStatus.Processing;
_repository.InsertOrUpdateVideo(video);
Trace.WriteLine(string.Format(string.Format("VideoID {0}: Updated video (JobID: '{1}', VideoStatus: {2})",
video.VideoID, video.MediaServicesJobID, video.VideoStatusEnum.ToString())));
// mark the message as "complete"
receivedMessage.Complete();
}
else
// we couldn't find a video... so abandon the message
receivedMessage.Abandon();
}
else
queueHasMessages = false;
}
// sleep the thread
Thread.Sleep(20000);
}
catch (MessagingException e)
{
if (!e.IsTransient)
{
Trace.WriteLine(e.Message);
throw;
}
Thread.Sleep(10000);
}
catch (OperationCanceledException e)
{
if (!_isStopped)
{
Trace.WriteLine(e.Message);
throw;
}
}
}
}
public void InsertOrUpdateVideoAsset(VideoAsset videoAsset)
{
_context.Entry(videoAsset).State = videoAsset.VideoAssetID == 0 ? EntityState.Added : EntityState.Modified;
_context.SaveChanges();
}