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();
 }