/// <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);
}
}