public void Enqueue(Type type, object data)
{
BackgroundThreadQueue.Enqueue(new Meta(data, this)
{
Type = type
});
}
/// <summary>
/// Called by the listener when a BaseStation message is received.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void MessageListener_MessageReceived(object sender, BaseStationMessageEventArgs args)
{
if (_BackgroundThreadMessageQueue != null)
{
_BackgroundThreadMessageQueue.Enqueue(args);
}
}
/// <summary>
/// See interface docs.
/// </summary>
/// <param name="bytes"></param>
public void Send(byte[] bytes)
{
if (_SendQueue != null)
{
_SendQueue.Enqueue(bytes);
}
}
/// <summary>
/// Called when a listener raises a BaseStation message event.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void Listener_Port30003MessageReceived(object sender, BaseStationMessageEventArgs args)
{
try {
var listener = (IListener)sender;
_MessageProcessingQueue.Enqueue(new MessageReceived(_Clock.UtcNow, listener, args));
} catch (Exception ex) {
OnExceptionCaught(new EventArgs <Exception>(ex));
}
}
/// <summary>
/// Called every time the provider sends some bytes to us.
/// </summary>
/// <param name="ar"></param>
private void BytesReceived(IAsyncResult ar)
{
try {
var now = Provider.UtcNow;
int bytesRead = -1;
bool fetchNext = true;
try {
bytesRead = Provider.EndRead(ar);
} catch (ObjectDisposedException) {
fetchNext = false;
} catch (SocketException) {
fetchNext = false;
Reconnect();
}
if (bytesRead == 0 || _Disposed)
{
fetchNext = false;
if (!_Disposed)
{
Reconnect();
}
}
else if (bytesRead > 0)
{
if (_Statistics.Lock != null)
{
lock (_Statistics.Lock) _Statistics.BytesReceived += bytesRead;
}
// This is a bit of a cheat - I don't want the overhead of taking a copy of the read buffer if nothing is
// listening to RawBytesReceived, so I take a peek at the event handler before creating the event args...
if (RawBytesReceived != null)
{
var copyRawBytes = new byte[bytesRead];
Array.Copy(Provider.ReadBuffer, 0, copyRawBytes, 0, bytesRead);
_MessageProcessingAndDispatchQueue.Enqueue(new MessageDispatch()
{
RawBytesEventArgs = new EventArgs <byte[]>(copyRawBytes)
});
}
foreach (var extractedBytes in BytesExtractor.ExtractMessageBytes(Provider.ReadBuffer, 0, bytesRead))
{
if (extractedBytes.ChecksumFailed)
{
++TotalBadMessages;
if (_Statistics.Lock != null)
{
lock (_Statistics.Lock) ++_Statistics.FailedChecksumMessages;
}
}
else
{
// Another cheat and for the same reason as explained for the RawBytesReceived message - we don't want to
// incur the overhead of copying the extracted bytes if there is nothing listening to the event.
if (ModeSBytesReceived != null && extractedBytes.Format == ExtractedBytesFormat.ModeS)
{
_MessageProcessingAndDispatchQueue.Enqueue(new MessageDispatch()
{
ModeSBytesEventArgs = new EventArgs <ExtractedBytes>((ExtractedBytes)extractedBytes.Clone())
});
}
switch (extractedBytes.Format)
{
case ExtractedBytesFormat.Port30003: ProcessPort30003MessageBytes(extractedBytes); break;
case ExtractedBytesFormat.ModeS: ProcessModeSMessageBytes(now, extractedBytes); break;
default: throw new NotImplementedException();
}
}
}
}
if (fetchNext)
{
Provider.BeginRead(BytesReceived);
}
} catch (Exception ex) {
Disconnect();
OnExceptionCaught(new EventArgs <Exception>(ex));
}
}
/// <summary>
/// Called every time the connection sends some bytes to us.
/// </summary>
/// <param name="connection"></param>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="length"></param>
/// <param name="bytesRead"></param>
private void BytesReceived(IConnection connection, byte[] buffer, int offset, int length, int bytesRead)
{
try {
var now = _Clock.UtcNow;
if (bytesRead > 0)
{
if (Statistics != null)
{
Statistics.Lock(r => r.BytesReceived += bytesRead);
}
_LastMessageUtc = now;
// This is a bit of a cheat - I don't want the overhead of taking a copy of the read buffer if nothing is
// listening to RawBytesReceived, so I take a peek at the event handler before creating the event args...
if (RawBytesReceived != null)
{
var copyRawBytes = new byte[bytesRead];
Array.Copy(buffer, offset, copyRawBytes, 0, bytesRead);
_MessageProcessingAndDispatchQueue.Enqueue(new MessageDispatch()
{
RawBytesEventArgs = new EventArgs <byte[]>(copyRawBytes)
});
}
foreach (var extractedBytes in BytesExtractor.ExtractMessageBytes(buffer, offset, bytesRead))
{
if (extractedBytes.ChecksumFailed)
{
++TotalBadMessages;
if (Statistics != null)
{
Statistics.Lock(r => ++ r.FailedChecksumMessages);
}
}
else
{
// Another cheat and for the same reason as explained for the RawBytesReceived message - we don't want to
// incur the overhead of copying the extracted bytes if there is nothing listening to the event.
if (ModeSBytesReceived != null && extractedBytes.Format == ExtractedBytesFormat.ModeS)
{
_MessageProcessingAndDispatchQueue.Enqueue(new MessageDispatch()
{
ModeSBytesEventArgs = new EventArgs <ExtractedBytes>((ExtractedBytes)extractedBytes.Clone())
});
}
switch (extractedBytes.Format)
{
case ExtractedBytesFormat.Port30003: ProcessPort30003MessageBytes(extractedBytes); break;
case ExtractedBytesFormat.ModeS: ProcessModeSMessageBytes(now, extractedBytes); break;
case ExtractedBytesFormat.Compressed: ProcessCompressedMessageBytes(now, extractedBytes); break;
case ExtractedBytesFormat.AircraftListJson: ProcessAircraftListJsonMessageBytes(now, extractedBytes); break;
case ExtractedBytesFormat.AirnavXRange: ProcessAirnavXRangeMessageBytes(now, extractedBytes); break;
default: throw new NotImplementedException();
}
}
}
if (Statistics != null)
{
Statistics.Lock(r => r.CurrentBufferSize = BytesExtractor.BufferSize);
}
}
Connector.Read(_Buffer, BytesReceived);
} catch (Exception ex) {
Disconnect();
OnExceptionCaught(new EventArgs <Exception>(ex));
}
}
/// <summary>
/// Applies the fetched aircraft record to the aircraft detail, raising any events appropriate.
/// </summary>
/// <param name="detail"></param>
/// <param name="databaseAircraft"></param>
/// <param name="aircraft"></param>
/// <param name="onlineAircraft"></param>
/// <param name="isFirstFetch"></param>
/// <param name="flightsCount"></param>
private AircraftDetail ApplyDatabaseRecord(AircraftDetail detail, BaseStationAircraft databaseAircraft, AircraftOnlineLookupDetail onlineAircraft, IAircraft aircraft, bool isFirstFetch, int flightsCount = -1)
{
var databaseAircraftChanged = detail == null;
if (!databaseAircraftChanged)
{
if (detail.Aircraft == null)
{
databaseAircraftChanged = databaseAircraft != null;
}
else
{
databaseAircraftChanged = !detail.Aircraft.Equals(databaseAircraft);
if (!databaseAircraftChanged && flightsCount > -1 && flightsCount != detail.FlightsCount)
{
databaseAircraftChanged = true;
}
}
}
var onlineAircraftChanged = detail == null;
if (!onlineAircraftChanged)
{
if (detail.OnlineAircraft == null)
{
onlineAircraftChanged = onlineAircraft != null;
}
else
{
onlineAircraftChanged = !detail.OnlineAircraft.ContentEquals(onlineAircraft);
}
}
if (_ForceRefreshOfStandingData && detail != null)
{
detail.AircraftType = null;
}
var icaoTypeCode = databaseAircraft == null ? null : databaseAircraft.ICAOTypeCode;
if (String.IsNullOrEmpty(icaoTypeCode) && onlineAircraft != null)
{
icaoTypeCode = onlineAircraft.ModelIcao;
}
var aircraftType = detail == null ? null : detail.AircraftType;
var aircraftTypeChanged = detail == null;
if (icaoTypeCode != null && (_ForceRefreshOfStandingData || detail == null || detail.Aircraft == null || detail.ModelIcao != icaoTypeCode))
{
aircraftType = _StandingDataManager.FindAircraftType(icaoTypeCode);
aircraftTypeChanged = true;
}
if (databaseAircraftChanged || onlineAircraftChanged || aircraftTypeChanged)
{
if (flightsCount == -1)
{
flightsCount = detail != null ? detail.FlightsCount
: databaseAircraft == null ? 0
: _AutoConfigDatabase.Database.GetCountOfFlightsForAircraft(databaseAircraft, new SearchBaseStationCriteria()
{
Date = new FilterRange <DateTime>(DateTime.MinValue, DateTime.MaxValue),
});
}
detail = new AircraftDetail()
{
Aircraft = databaseAircraft,
OnlineAircraft = onlineAircraft,
AircraftType = aircraftType,
FlightsCount = flightsCount,
Icao24 = aircraft.Icao24,
Picture = detail == null ? null : detail.Picture,
};
OnFetched(new EventArgs <AircraftDetail>(detail));
}
var registration = databaseAircraft != null ? databaseAircraft.Registration : aircraft.Registration;
if (registration == null && onlineAircraft != null)
{
registration = onlineAircraft.Registration;
}
if (_PictureLookupThread != null)
{
_PictureLookupThread.Enqueue(new LookupPictureDetail()
{
Icao = aircraft.Icao24,
Registration = registration,
PictureDetail = detail == null ? null : detail.Picture,
});
}
return(detail);
}
