/// <summary>
        /// Loads the tracker from database.
        /// </summary>
        private static void LoadTrackerFromDatabase()
        {
            IEnumerable <PublishRequest> requestsFromDatabase = PublishRequest.LoadFromDatabase(false);

            foreach (var requestFromDataBase in requestsFromDatabase)
            {
                if (requestFromDataBase.CurrentStatus.CurrentStage == PublishStage.Completed ||
                    requestFromDataBase.CurrentStatus.CurrentStage == PublishStage.AbortedOnError ||
                    requestFromDataBase.CurrentStatus.CurrentStage == PublishStage.AbortedOnDemand ||
                    requestFromDataBase.CurrentStatus.CurrentStage == PublishStage.PerformingCleanup)
                {
                    if (requestFromDataBase.CurrentStatus.CurrentStage == PublishStage.PerformingCleanup)
                    {
                        requestFromDataBase.CurrentStatus.CurrentStage = PublishStage.Completed;
                    }
                    PublishRequestTracker.Add(requestFromDataBase);
                }
                else
                {
                    PublishStatus newStatus = new PublishStatus(requestFromDataBase.InstanceId)
                    {
                        ResourceTypeName = requestFromDataBase.ResourceTypeName, DataModelNamespace = requestFromDataBase.DataModelNamespace
                    };
                    requestFromDataBase.CurrentStatus = newStatus;
                    SingletonQueueProcessor.publishRequestQueue.Enqueue(requestFromDataBase);
                }
            }
        }
        /// <summary>
        /// Loads the queue from database.
        /// </summary>
        private static void LoadQueueFromDatabase()
        {
            IEnumerable <PublishRequest> requestsFromDatabase = PublishRequest.LoadFromDatabase(true);

            foreach (var requestFromDataBase in requestsFromDatabase)
            {
                SingletonQueueProcessor.publishRequestQueue.Enqueue(requestFromDataBase);
            }
        }