/// <summary>Transmit request to embedded system.</summary> /// <param name="request">The request to send to embedded.</param> private static void TransmitRequest(RequestContext request) { bool requestIsTransmitted = false; ServiceInfo serviceInfo; // Check if target element is online bool elementIsOnline; T2GManagerErrorEnum rqstResult = _train2groundManager.IsElementOnline(request.ElementId, out elementIsOnline); switch (rqstResult) { case T2GManagerErrorEnum.eSuccess: if (elementIsOnline == true) { T2GManagerErrorEnum result = _train2groundManager.GetAvailableServiceData(request.ElementId, (int)eServiceID.eSrvSIF_LiveVideoControlServer, out serviceInfo); switch (result) { case T2GManagerErrorEnum.eSuccess: { string endpoint = "http://" + serviceInfo.ServiceIPAddress + ":" + serviceInfo.ServicePortNumber; try { // Call LiveVideoControl train service using (LiveVideoControlServiceClient trainClient = new LiveVideoControlServiceClient("LiveVideoControlEndpoint", endpoint)) { try { if (request is ProcessStopVideoStreamingCommandRequestContext) { RequestProcessor.TransmitStopVideoStreamingCommandRequest(trainClient, request as ProcessStopVideoStreamingCommandRequestContext); } else if (request is ProcessStartVideoStreamingCommandRequestContext) { RequestProcessor.TransmitStartVideoStreamingCommandRequest(trainClient, request as ProcessStartVideoStreamingCommandRequestContext); } else if (request is ProcessSendVideoStreamingStatusRequestContext) { RequestProcessor.TransmitSendVideoStreamingStatusRequest(trainClient, request as ProcessSendVideoStreamingStatusRequestContext); } else { // No other request type supported } requestIsTransmitted = true; } catch (Exception ex) { if (!RequestProcessor.ShouldContinueOnTransmissionError(ex)) { // Assume transmitted (no reason to retry) requestIsTransmitted = true; } } finally { if (trainClient.State == CommunicationState.Faulted) { trainClient.Abort(); } } } } catch (Exception ex) { if (!RequestProcessor.ShouldContinueOnTransmissionError(ex)) { // Assume transmitted (no reason to retry) requestIsTransmitted = true; } } } break; case T2GManagerErrorEnum.eT2GServerOffline: RequestProcessor.SendNotificationToGroundApp(request.RequestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlT2GServerOffline, string.Empty); break; case T2GManagerErrorEnum.eElementNotFound: RequestProcessor.SendNotificationToGroundApp(request.RequestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlElementNotFound, request.ElementId); break; case T2GManagerErrorEnum.eServiceInfoNotFound: RequestProcessor.SendNotificationToGroundApp(request.RequestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlServiceNotFound, request.ElementId); break; default: break; } } break; case T2GManagerErrorEnum.eT2GServerOffline: RequestProcessor.SendNotificationToGroundApp(request.RequestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlT2GServerOffline, string.Empty); break; case T2GManagerErrorEnum.eElementNotFound: requestIsTransmitted = true; RequestProcessor.SendNotificationToGroundApp(request.RequestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlElementNotFound, request.ElementId); break; default: break; } request.TransmissionStatus = requestIsTransmitted; if (request.State == RequestState.WaitingRetry && request.TransferAttemptsDone == 1) { // first attempt failed, send notification RequestProcessor.SendNotificationToGroundApp(request.RequestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlDistributionWaitingToSend, request.ElementId); } }
/// <summary>Executes the transmit event action.</summary> private static void OnTransmitEvent() { try { List <RequestContext> currentRequests = new List <RequestContext>(); while (true) { if (currentRequests.Count == 0) { _transmitEvent.WaitOne(); } lock (RequestProcessor._lock) { // Move pending from _newRequests to currentRequests if (_newRequests.Count > 0) { currentRequests.AddRange(RequestProcessor._newRequests); RequestProcessor._newRequests.Clear(); currentRequests.RemoveAll(c => c == null); } } for (int i = 0; i < currentRequests.Count; ++i) { RequestContext request = currentRequests[i]; switch (request.State) { case RequestState.Created: for (int j = currentRequests.Count - 1; j >= 0; --j) { RequestContext c = currentRequests[j]; if (i != j && (c.ElementId == request.ElementId && ((c.RequestId != request.RequestId) || (c.RequestId == Guid.Empty || request.RequestId == Guid.Empty)))) { currentRequests.RemoveAt(j); if (j < i) { --i; } } } break; case RequestState.ReadyToSend: RequestProcessor.TransmitRequest(request); break; case RequestState.WaitingRetry: break; case RequestState.Expired: lock (RequestProcessor._lock) { RequestProcessor._newRequests.Add(request); RequestProcessor._transmitEvent.Set(); } break; case RequestState.Transmitted: request.CompletionStatus = true; break; case RequestState.AllRetriesExhausted: break; case RequestState.Completed: break; } } currentRequests.RemoveAll(c => c.IsStateFinal); Thread.Sleep(100); } } catch (ThreadAbortException) { // No logic to apply } catch (System.Exception exception) { LogManager.WriteLog(TraceType.EXCEPTION, exception.Message, "PIS.Ground.LiveVideoControl.LiveVideoControlService.OnTransmitEvent", exception, EventIdEnum.LiveVideoControl); } }