/// <summary>
/// Returns the component listener for the listener passed across.
/// </summary>
/// <param name="listener"></param>
/// <returns></returns>
private IMergedFeedComponentListener GetComponentListener(IListener listener)
{
IMergedFeedComponentListener result = null;
if (listener != null)
{
lock (_SyncLock) {
if (_Listeners.Count >= 12)
{
_ComponentListenersMap.TryGetValue(listener.ReceiverId, out result);
}
else
{
for (var i = 0; i < _Listeners.Count; ++i)
{
var component = _Listeners[i];
if (component.Listener.ReceiverId == listener.ReceiverId)
{
result = component;
break;
}
}
}
}
}
return(result);
}
public void TestInitialise()
{
_Component = Factory.Singleton.Resolve <IMergedFeedComponentListener>();
_Listener = TestUtilities.CreateMockInstance <IListener>();
}
/// <summary>
/// Determines whether the message from a receiver can be used.
/// </summary>
/// <param name="receivedUtc"></param>
/// <param name="listener"></param>
/// <param name="icao"></param>
/// <param name="hasPosition"></param>
/// <param name="hasTrack"></param>
/// <param name="hasGroundSpeed"></param>
/// <param name="positionIsMlat"></param>
/// <returns></returns>
private FilterMessageOutcome FilterMessageFromListener(DateTime receivedUtc, IListener listener, string icao, bool hasPosition, bool hasTrack, bool hasGroundSpeed, bool positionIsMlat)
{
var result = FilterMessageOutcome.Failed;
icao = icao ?? "";
Source source = null;
IMergedFeedComponentListener component = null;
lock (_SyncLock) {
component = GetComponentListener(listener);
if (component != null)
{
if (!_IcaoSourceMap.TryGetValue(icao, out source))
{
source = new Source()
{
LastMessageUtc = receivedUtc,
Component = component,
SeenPositionMessage = hasPosition,
};
_IcaoSourceMap.Add(icao, source);
result = FilterMessageOutcome.Passed;
}
else
{
if (source.Component == component)
{
result = FilterMessageOutcome.Passed;
}
else
{
var threshold = receivedUtc.AddMilliseconds(-IcaoTimeout);
if (source.LastMessageUtc < threshold)
{
source.Component = component;
result = FilterMessageOutcome.Passed;
}
}
if (result == FilterMessageOutcome.Failed && (hasPosition || hasTrack || hasGroundSpeed) && (positionIsMlat || component.IsMlatFeed))
{
result = FilterMessageOutcome.OutOfBand;
}
switch (result)
{
case FilterMessageOutcome.OutOfBand:
if (hasPosition)
{
source.SeenPositionMessage = true;
}
break;
case FilterMessageOutcome.Passed:
source.LastMessageUtc = receivedUtc;
goto case FilterMessageOutcome.OutOfBand;
}
}
}
}
if (result == FilterMessageOutcome.Passed && IgnoreAircraftWithNoPosition && source != null && !source.SeenPositionMessage)
{
result = FilterMessageOutcome.Failed;
}
return(result);
}