public FlightMonitor()
{
monitoringThread = new Thread(new ThreadStart(MonitoringWorker));
Queue = new BlockingCollection <FSUIPCSnapshot>();
Interests = new List <SnapshotInterest>();
lastQueued = null;
}
/// <summary>
/// Returns an FSUIPCSnapshot instance with the current state of the sim
///
///
/// </summary>
/// <param name="connectCooldown">Time between reconnect tries to Simulator, in miliseconds.
/// Defaults to 30000.</param>
/// <returns></returns>
public static FSUIPCSnapshot Pool(int connectCooldown = 30000)
{
// TODO: do not block the current thread on this
// application may receive a OS taskkill command.
// Maybe expose connected = true?
while (!connected)
{
try
{
FSUIPCConnection.Open();
connected = true;
}
catch (FSUIPCException crap)
{
switch (crap.FSUIPCErrorCode)
{
case FSUIPCError.FSUIPC_ERR_OPEN:
connected = true;
break;
case FSUIPCError.FSUIPC_ERR_NOFS:
Thread.Sleep(connectCooldown);
break;
default:
throw new ApplicationException(
"Unexpected exception trying FSUIPC.Open(). Check inner exception.",
crap);
}
}
}
try
{
FSUIPCConnection.Process();
}
catch (Exception crap)
{
// TODO: catch ONLY relevant execeptions
// connected = false;
throw new ApplicationException("Provider.Pool() failed with:", crap);
}
if (connected)
{
FSUIPCSnapshot data = new FSUIPCSnapshot(true);
// FSUIPC will return data even if the user is in scenario screen
// or any other screen really.
// TODO: actually filter invalid locations
return(data.Position.SequenceEqual(new double[] { 0, 0 }) ? null : data);
}
return(null);
}
private void MonitoringWorker()
{
while (running)
{
FSUIPCSnapshot contender = FSUIPCSnapshot.Pool();
foreach (SnapshotInterest s in Interests)
{
if (lastQueued == null || s(lastQueued, contender))
{
Queue.Add(lastQueued = contender);
}
}
Thread.Sleep(1);
}
}
