/// <summary>Performing the necessary operations when entering the automatic mode.</summary>
/// <param name="url">Streaming URL.</param>
/// <returns>.</returns>
private static LiveVideoControlResult ProcessAutomaticMode(string url)
{
LogManager.WriteLog(
TraceType.INFO,
"Entering automatic mode",
"PIS.Ground.LiveVideoControl.LiveVideoControlService.ProcessAutomaticMode",
null,
EventIdEnum.LiveVideoControl);
LiveVideoControlResult result = new LiveVideoControlResult();
result.RequestId = Guid.Empty;
result.ResultCode = LiveVideoControlErrorEnum.InternalError;
// Starting a background process to send start commands to the trains that have the
// desired status
DelegateAutomaticModeBackgroundProcessing handler = SendStartStreamingCommandToProperStatusElements;
handler.BeginInvoke(url, handler.EndInvoke, null);
result.Url = url;
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
return(result);
}
/// <summary>Command to select the automatic or manual starting mode for the video streaming.
/// If the specified URL is empty or null, manual mode is selected.
/// Otherwise, automatic mode is selected</summary>
/// <param name="sessionId">Identifier for the session.</param>
/// <param name="url">URL of the stream to be used in automatic mode.</param>
/// <returns>Return statement of the request (Success, failed,...) with URL and request id.</returns>
LiveVideoControlResult ILiveVideoControlService.ChangeCommandMode(Guid sessionId, string url)
{
LiveVideoControlResult result = new LiveVideoControlResult();
result.RequestId = Guid.Empty;
result.ResultCode = LiveVideoControlErrorEnum.InternalError;
if (_sessionManager.IsSessionValid(sessionId))
{
// Checking if the specified url contains an non empty string
if (string.IsNullOrEmpty(url) || url.Trim().Length == 0)
{
// If empty url, it means we want to clear the automatic mode
if (ClearAutomaticMode())
{
// Notify all clients that we are entering the manual mode
LiveVideoControlService.SendNotificationToGroundApp(
Guid.Empty,
PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlManualMode,
null);
}
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
}
else
{
// If non empty url, it means we want to enter the automatic mode
lock (_automaticModeLock)
{
if (SetAutomaticMode(url))
{
// Send notifications and start commands
result = ProcessAutomaticMode(url);
// If the command failed, restore the manual mode
if (result.ResultCode != LiveVideoControlErrorEnum.RequestAccepted)
{
ClearAutomaticMode();
}
}
else
{
// We are already in automatic mode. Get the current url used.
string currentAutomaticURL;
GetAutomaticMode(out currentAutomaticURL);
result.Url = currentAutomaticURL;
result.ResultCode = LiveVideoControlErrorEnum.AutomaticModeActivated;
}
}
}
}
else
{
result.ResultCode = LiveVideoControlErrorEnum.InvalidSessionId;
}
return(result);
}
/// <summary>Command to determine the current command mode.</summary>
/// <param name="sessionId">Identifier for the session.</param>
/// <returns>Null if manual mode, streaming URL if automatic mode</returns>
LiveVideoControlResult ILiveVideoControlService.GetCommandMode(Guid sessionId)
{
LiveVideoControlResult result = new LiveVideoControlResult();
result.RequestId = Guid.Empty;
result.ResultCode = LiveVideoControlErrorEnum.InternalError;
result.Url = null;
if (_sessionManager.IsSessionValid(sessionId))
{
string url;
GetAutomaticMode(out url);
result.Url = url;
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
}
else
{
result.ResultCode = LiveVideoControlErrorEnum.InvalidSessionId;
}
return(result);
}
/// <summary>
/// LiveVideoControlService Web service method "StartVideoStreamingCommand" that sends a
/// scheduled message to addressee.
/// </summary>
/// <param name="sessionId">The session identifier.</param>
/// <param name="targetAddress">Addressee information.</param>
/// <param name="url">The request timeout.</param>
/// <returns>Response <see cref="LiveVideoControlResult"/>.</returns>
LiveVideoControlResult ILiveVideoControlService.StartVideoStreamingCommand(
Guid sessionId,
TargetAddressType targetAddress,
string url)
{
LiveVideoControlResult result = new LiveVideoControlResult();
result.RequestId = Guid.Empty;
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
string automaticModeURL;
if (_sessionManager.IsSessionValid(sessionId))
{
if (GetAutomaticMode(out automaticModeURL) == false)
{
_dicVideoHistory[targetAddress] = url;
_dicVideoHistorySentService[targetAddress] = null;
result = SendStartStreamingCommand(
sessionId,
targetAddress,
url
);
}
else
{
result.Url = automaticModeURL;
result.ResultCode = LiveVideoControlErrorEnum.AutomaticModeActivated;
}
}
else
{
result.ResultCode = LiveVideoControlErrorEnum.InvalidSessionId;
}
return(result);
}
/// <summary>
/// LiveVideoControlService Web service method "StopVideoStreamingCommand" that cancels all
/// predefined and free-text messages at addressee.
/// </summary>
/// <param name="sessionId">The session identifier.</param>
/// <param name="targetAddress">Addressee information.</param>
/// <returns>Response <see cref="LiveVideoControlResult"/>.</returns>
LiveVideoControlResult ILiveVideoControlService.StopVideoStreamingCommand(
Guid sessionId,
TargetAddressType targetAddress)
{
LiveVideoControlResult result = new LiveVideoControlResult();
result.RequestId = Guid.Empty;
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
_dicVideoHistory.Remove(targetAddress);
_dicVideoHistorySentService.Remove(targetAddress);
if (_sessionManager.IsSessionValid(sessionId))
{
string automaticModeURL;
if (GetAutomaticMode(out automaticModeURL) == false)
{
Guid requestId = Guid.Empty;
string error = _sessionManager.GenerateRequestID(sessionId, out requestId);
if (requestId != Guid.Empty)
{
ElementList <AvailableElementData> elements;
T2GManagerErrorEnum rqstResult = _t2gManager.GetAvailableElementDataByTargetAddress(targetAddress, out elements);
switch (rqstResult)
{
case T2GManagerErrorEnum.eSuccess:
{
List <RequestContext> newRequests = new List <RequestContext>();
foreach (AvailableElementData element in elements)
{
LiveVideoControlService.SendNotificationToGroundApp(requestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlDistributionProcessing, element.ElementNumber);
ProcessStopVideoStreamingCommandRequestContext request = new ProcessStopVideoStreamingCommandRequestContext(
element.ElementNumber,
requestId,
sessionId);
newRequests.Add(request);
}
_requestProcessor.AddRequestRange(newRequests);
result.RequestId = requestId;
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
}
break;
case T2GManagerErrorEnum.eT2GServerOffline:
result.ResultCode = LiveVideoControlErrorEnum.T2GServerOffline;
break;
case T2GManagerErrorEnum.eElementNotFound:
result.ResultCode = LiveVideoControlService.GetInvalidTargetAddressResponse(targetAddress);
break;
default:
break;
}
}
else
{
LogManager.WriteLog(TraceType.ERROR, error, "PIS.Ground.LiveVideoControl.LiveVideoControlService.StopVideoStreamingCommand", null, EventIdEnum.LiveVideoControl);
result.ResultCode = LiveVideoControlErrorEnum.InvalidRequestID;
}
}
else
{
result.Url = automaticModeURL;
result.ResultCode = LiveVideoControlErrorEnum.AutomaticModeActivated;
}
}
else
{
result.ResultCode = LiveVideoControlErrorEnum.InvalidSessionId;
}
return(result);
}
/// <summary>Sends a start streaming command.</summary>
/// <param name="sessionId">The session identifier.</param>
/// <param name="targetAddress">Addressee information.</param>
/// <param name="url">The streaming URL to be used.</param>
/// <returns>Response <see cref="LiveVideoControlElementListResult"/>.</returns>
private static LiveVideoControlResult SendStartStreamingCommand(
Guid sessionId,
TargetAddressType targetAddress,
string url)
{
LiveVideoControlResult result = new LiveVideoControlResult();
result.RequestId = Guid.Empty;
result.ResultCode = LiveVideoControlErrorEnum.InternalError;
Guid requestId = Guid.Empty;
string error;
if (sessionId != Guid.Empty)
{
error = _sessionManager.GenerateRequestID(sessionId, out requestId);
}
else
{
error = _sessionManager.GenerateRequestID(out requestId);
}
if (requestId != Guid.Empty)
{
ElementList <AvailableElementData> elements;
T2GManagerErrorEnum rqstResult = _t2gManager.GetAvailableElementDataByTargetAddress(targetAddress, out elements);
switch (rqstResult)
{
case T2GManagerErrorEnum.eSuccess:
Guid notificationRequestId = requestId;
List <RequestContext> newRequests = new List <RequestContext>();
foreach (AvailableElementData element in elements)
{
if (_dicVideoHistorySentService.ContainsKey(targetAddress))
{
ServiceInfo availableService;
if (_t2gManager.GetAvailableServiceData(element.ElementNumber, (int)eServiceID.eSrvSIF_LiveVideoControlServer, out availableService) == T2GManagerErrorEnum.eSuccess)
{
_dicVideoHistorySentService[targetAddress] = availableService;
}
}
LiveVideoControlService.SendNotificationToGroundApp(requestId, PIS.Ground.GroundCore.AppGround.NotificationIdEnum.LiveVideoControlDistributionProcessing, element.ElementNumber);
ProcessStartVideoStreamingCommandRequestContext request = new ProcessStartVideoStreamingCommandRequestContext(
element.ElementNumber,
requestId,
sessionId,
url);
newRequests.Add(request);
}
_requestProcessor.AddRequestRange(newRequests);
result.RequestId = requestId;
result.ResultCode = LiveVideoControlErrorEnum.RequestAccepted;
break;
case T2GManagerErrorEnum.eT2GServerOffline:
LogManager.WriteLog(TraceType.ERROR, "T2G Offline", "PIS.Ground.LiveVideoControl.LiveVideoControlService.SendStartStreamingCommand", null, EventIdEnum.LiveVideoControl);
result.ResultCode = LiveVideoControlErrorEnum.T2GServerOffline;
break;
case T2GManagerErrorEnum.eElementNotFound:
LogManager.WriteLog(TraceType.ERROR, "Element not found", "PIS.Ground.LiveVideoControl.LiveVideoControlService.SendStartStreamingCommand", null, EventIdEnum.LiveVideoControl);
result.ResultCode = LiveVideoControlService.GetInvalidTargetAddressResponse(targetAddress);
break;
default:
LogManager.WriteLog(TraceType.ERROR, "Problem looking for an element. T2GClient returned: " + rqstResult.ToString(),
"PIS.Ground.LiveVideoControl.LiveVideoControlService.SendStartStreamingCommand", null, EventIdEnum.LiveVideoControl);
result.ResultCode = LiveVideoControlErrorEnum.InternalError;
break;
}
}
else
{
LogManager.WriteLog(TraceType.ERROR, error, "PIS.Ground.LiveVideoControl.LiveVideoControlService.SendStartStreamingCommand", null, EventIdEnum.LiveVideoControl);
result.ResultCode = LiveVideoControlErrorEnum.InvalidRequestID;
}
return(result);
}
/// <summary>
/// Callback called when Element Online state changes (signaled by the T2G Client).
/// </summary>
/// <param name="sender">Source of the event.</param>
/// <param name="args">Event information to send to registered event handlers.</param>
public static void OnElementInfoChanged(object sender, ElementEventArgs args)
{
if (args != null &&
args.SystemInformation != null &&
args.SystemInformation.IsOnline == true &&
args.SystemInformation.PisMission != null &&
args.SystemInformation.PisMission.MissionState == MissionStateEnum.MI)
{
// Will be called multiple times for the same train.
// Some sort of debouncing will be welcome in a future revision
// to prevent multiple notifications to the console(s)
if (string.IsNullOrEmpty(args.SystemInformation.SystemId) == false)
{
TargetAddressType target = new TargetAddressType();
target.Type = AddressTypeEnum.Element;
target.Id = args.SystemInformation.SystemId;
string automaticModeUrl;
if (GetAutomaticMode(out automaticModeUrl) == true)
{
LogManager.WriteLog(
TraceType.INFO,
"Automatically starting streaming on newly detected train: " + args.SystemInformation.SystemId,
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null,
EventIdEnum.LiveVideoControl);
LiveVideoControlResult result =
SendStartStreamingCommand(Guid.Empty, target, automaticModeUrl);
if (result.ResultCode != LiveVideoControlErrorEnum.RequestAccepted)
{
LogManager.WriteLog(TraceType.ERROR,
"Problem sending a start command with url "
+ automaticModeUrl
+ " to train "
+ target.Id
+ ". Error: "
+ result.ResultCode.ToString(),
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null, EventIdEnum.LiveVideoControl);
}
}
else
{
// Manual Mode, resend the latest Start command if available
ServiceInfo lastSentService;
if (_dicVideoHistory.ContainsKey(target) && _dicVideoHistorySentService.TryGetValue(target, out lastSentService))
{
ServiceInfo foundService = (args.SystemInformation.ServiceList != null) ? args.SystemInformation.ServiceList.FirstOrDefault(s => s.ServiceId == (ushort)eServiceID.eSrvSIF_LiveVideoControlServer && s.IsAvailable): null;
bool lServiceLiveVideoControlServerAvailable = foundService != null;
// If service is not available, force the sent status to value false.
if (!lServiceLiveVideoControlServerAvailable && lastSentService != null)
{
_dicVideoHistorySentService[target] = null;
}
// Avoiding sending multiple start notifications.
// The LiveVideoService have to be online
if (lServiceLiveVideoControlServerAvailable == true && (lastSentService == null || !foundService.Equals(lastSentService)))
{
LogManager.WriteLog(
TraceType.INFO,
"Re-starting streaming on newly detected train: " + args.SystemInformation.SystemId,
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null,
EventIdEnum.LiveVideoControl);
LiveVideoControlResult result =
SendStartStreamingCommand(Guid.Empty, target, _dicVideoHistory[target]);
// Setting the flag that the start command was already sent
_dicVideoHistorySentService[target] = foundService;
if (result.ResultCode != LiveVideoControlErrorEnum.RequestAccepted)
{
LogManager.WriteLog(TraceType.ERROR,
"Problem sending a start command with url "
+ _dicVideoHistory[target]
+ " to train "
+ target.Id
+ ". Error: "
+ result.ResultCode.ToString(),
"PIS.Ground.LiveVideoControl.LiveVideoControlService.OnElementInfoChanged",
null, EventIdEnum.LiveVideoControl);
}
}
}
}
}
}
}