/// <summary>
/// Cancel a real time data stream and clean up after it.
/// </summary>
/// <returns>True if the stream was canceled, False if subsribers remain.</returns>
public bool CancelRTDStream(int instrumentID)
{
lock (_activeStreamsLock)
{
//TODO cancelrealtimedata on the client needs to be more specific than just the instrument
//make sure there is a data stream for this instrument
if (ActiveStreams.Collection.Any(x => x.Instrument.ID == instrumentID))
{
var streamInfo = ActiveStreams.Collection.First(x => x.Instrument.ID == instrumentID);
var instrument = streamInfo.Instrument;
//if it's a continuous future we also need to cancel the actual contract
if (instrument.IsContinuousFuture)
{
var contractID = _continuousFuturesIDMap[instrumentID];
var contract = ActiveStreams.Collection.First(x => x.Instrument.ID == contractID).Instrument;
//we must also clear the alias list
lock (_aliasLock)
{
_aliases[contractID].Remove(instrumentID);
if (_aliases[contractID].Count == 0)
{
_aliases.Remove(contractID);
}
}
//finally cancel the contract's stream
CancelRTDStream(contractID);
}
//log the request
Log(LogLevel.Info,
string.Format("RTD Cancelation request: {0} from {1}",
instrument.Symbol,
instrument.Datasource.Name));
lock (_subscriberCountLock)
{
StreamSubscribersCount[streamInfo]--;
if (StreamSubscribersCount[streamInfo] == 0)
{
//there are no clients subscribed to this stream anymore
//cancel it and remove it from all the places
StreamSubscribersCount.Remove(streamInfo);
ActiveStreams.TryRemove(streamInfo);
if (!instrument.IsContinuousFuture)
{
DataSources[streamInfo.Datasource].CancelRealTimeData(streamInfo.RequestID);
}
return(true);
}
}
}
return(false);
}
}
public void Reset()
{
shotIterator.Reset();
Bullets.Clear();
ActiveStreams.Clear();
Score = 0;
TotalExited = 0;
}
/// <summary>
/// Updates streams.
/// </summary>
private void UpdateStreams(LevelTime levelTime, Vector2 playerCenter)
{
// TODO Refactor this old mess
if (ActiveStreams.Count == 0)
{
return;
}
for (int i = 0; i < ActiveStreams.Count; i++)
{
var stream = ActiveStreams[i];
stream.TimeSinceLastShot += (float)levelTime.ElapsedMs;
if (stream.TimeSinceLastShot >= StreamShot.FireFrequency)
{
var currStreamTime = levelTime.SongPosition - stream.Time;
var currSpeed = stream.Speed0 + (currStreamTime * ((stream.Speed1 - stream.Speed0) / stream.Duration));
var currAngle = stream.Angle0 + (currStreamTime * ((stream.Angle1 - stream.Angle0) / stream.Duration));
var currOffset = stream.Offset0 + (currStreamTime * ((stream.Offset1 - stream.Offset0) / stream.Duration));
bool lastShot = levelTime.SongPosition + StreamShot.FireFrequency > stream.Time + stream.Duration;
foreach (int enemy in stream.Enemies)
{
var spawner = Util.GetSpawnerFromShotIndex(spawners, enemy);
var wave = new Wave()
{
BulletType = stream.BulletType,
Amount = stream.Amount0,
Speed = currSpeed,
Angle = currAngle,
Offset = currOffset,
Aim = stream.Aim,
HomingLifespan = stream.HomingLifespan,
};
Bullets.AddRange(wave.Create(spawner.Center, spawner.Angle,
playerCenter, level.Info.Colors));
if (lastShot && Config.GameSettings.DrawParticles)
{
particles.CreateShotSpawnParticles(spawner, stream.Color);
}
}
if (lastShot)
{
ActiveStreams.RemoveAt(i);
i--;
}
else
{
stream.TimeSinceLastShot -= StreamShot.FireFrequency;
}
}
}
}
public void ConfigureChannels()
{
if (Running)
{
throw new HekaDAQException("Cannot configure channels while hardware is running.");
}
Device.ConfigureChannels(ActiveStreams.Cast <HekaDAQStream>());
}
public Http2Session(SecureSocket sessionSocket, ConnectionEnd end,
bool usePriorities, bool useFlowControl,
IDictionary<string, object> handshakeResult = null)
{
_ourEnd = end;
_usePriorities = usePriorities;
_useFlowControl = useFlowControl;
_handshakeHeaders = new Dictionary<string, string>(16);
ApplyHandshakeResults(handshakeResult);
if (_ourEnd == ConnectionEnd.Client)
{
_remoteEnd = ConnectionEnd.Server;
_lastId = -1; // Streams opened by client are odd
}
else
{
_remoteEnd = ConnectionEnd.Client;
_lastId = 0; // Streams opened by server are even
}
_goAwayReceived = false;
_settingsManager = new SettingsManager();
_comprProc = new CompressionProcessor(_ourEnd);
_sessionSocket = sessionSocket;
_frameReader = new FrameReader(_sessionSocket);
ActiveStreams = new ActiveStreams();
_writeQueue = new WriteQueue(_sessionSocket, ActiveStreams, _usePriorities);
if (_sessionSocket != null && sessionSocket.SecureProtocol == SecureProtocol.None)
{
OurMaxConcurrentStreams = int.Parse(_handshakeHeaders[":max_concurrent_streams"]);
RemoteMaxConcurrentStreams = int.Parse(_handshakeHeaders[":max_concurrent_streams"]);
InitialWindowSize = int.Parse(_handshakeHeaders[":initial_window_size"]);
}
else
{
OurMaxConcurrentStreams = 100; //Spec recommends value 100 by default
RemoteMaxConcurrentStreams = 100;
InitialWindowSize = 2000000;
}
_flowControlManager = new FlowControlManager(this);
if (!_useFlowControl)
{
_flowControlManager.Options = (byte) FlowControlOptions.DontUseFlowControl;
}
SessionWindowSize = 0;
_toBeContinuedHeaders = new HeadersList();
}
public FlowControlManager(Http2Session flowControlledSession)
{
SessionInitialWindowSize = Constants.DefaultFlowControlCredit;
StreamsInitialWindowSize = Constants.DefaultFlowControlCredit;
_flowControlledSession = flowControlledSession;
_streamCollection = _flowControlledSession.ActiveStreams;
Options = Constants.InitialFlowControlOptionsValue;
IsSessionBlocked = false;
}
public FlowControlManager(Http2Session flowControlledSession)
{
SessionInitialWindowSize = Constants.DefaultFlowControlCredit;
StreamsInitialWindowSize = Constants.DefaultFlowControlCredit;
_flowControlledSession = flowControlledSession;
_streamCollection = _flowControlledSession.ActiveStreams;
Options = Constants.InitialFlowControlOptionsValue;
IsSessionBlocked = false;
}
public WriteQueue(SecureSocket socket, ActiveStreams streams, bool isPriorityTurnedOn)
{
IsPriorityTurnedOn = isPriorityTurnedOn;
_streams = streams;
if (isPriorityTurnedOn)
{
_messageQueue = new PriorityQueue();
}
else
{
_messageQueue = new QueueWrapper();
}
_socket = socket;
_disposed = false;
}
/// <summary>
/// Cancel a real time data stream and clean up after it.
/// </summary>
/// <returns>True if the stream was canceled, False if subsribers remain.</returns>
public bool CancelRTDStream(int instrumentID, BarSize frequency)
{
lock (_activeStreamsLock)
{
//make sure there is a data stream for this instrument
if (ActiveStreams.Collection.Any(x => x.Instrument.ID == instrumentID && x.Frequency == frequency))
{
var streamInfo = ActiveStreams.Collection.First(x => x.Instrument.ID == instrumentID && x.Frequency == frequency);
var instrument = streamInfo.Instrument;
//if it's a continuous future we also need to cancel the actual contract
if (instrument.IsContinuousFuture)
{
CancelContinuousFutureRTD(instrumentID, frequency, instrument);
}
//log the request
Log(LogLevel.Info,
string.Format("RTD Cancelation request: {0} from {1}",
instrument.Symbol,
instrument.Datasource.Name));
lock (_subscriberCountLock)
{
StreamSubscribersCount[streamInfo]--;
if (StreamSubscribersCount[streamInfo] == 0)
{
//there are no clients subscribed to this stream anymore
//cancel it and remove it from all the places
StreamSubscribersCount.Remove(streamInfo);
ActiveStreams.TryRemove(streamInfo);
if (!instrument.IsContinuousFuture)
{
DataSources[streamInfo.Datasource].CancelRealTimeData(streamInfo.RequestID);
}
return(true);
}
}
}
return(false);
}
}
public FlowControlManager(Http2Session flowControlledSession)
{
if (flowControlledSession == null)
throw new ArgumentNullException("flowControlledSession is null");
//06
//When a HTTP/2.0 connection is first established, new streams are
//created with an initial flow control window size of 65535 bytes. The
//connection flow control window is 65535 bytes.
SessionInitialWindowSize = Constants.InitialFlowControlWindowSize;
StreamsInitialWindowSize = Constants.InitialFlowControlWindowSize;
_flowControlledSession = flowControlledSession;
_streamCollection = _flowControlledSession.ActiveStreams;
Options = Constants.InitialFlowControlOptionsValue;
_wasFlowControlSet = false;
IsSessionBlocked = false;
}
protected override void OnDisposing()
{
if (this.NotificationSource != null)
{
this.NotificationSource.Ending -= this.OnEnding;
this.NotificationSource.Ended -= this.OnEnded;
}
try
{
this.Provider.FreeStream(this.PlaylistItem, this.ChannelHandle);
}
finally
{
if (!ActiveStreams.TryRemove(this.PlaylistItem))
{
//TODO: Warn.
}
}
this.ChannelHandle = 0;
}
/// <summary>
/// Sends a real time data request to the correct data source, logs it, and updates subscriber counts
/// </summary>
/// <param name="request"></param>
private void ForwardRTDRequest(RealTimeDataRequest request)
{
//send the request to the correct data source
int reqID;
try
{
reqID = DataSources[request.Instrument.Datasource.Name].RequestRealTimeData(request);
}
catch (Exception ex)
{
Log(LogLevel.Error, "Error requesting real time data: " + ex.Message);
return;
}
//log the request
Log(LogLevel.Info,
string.Format("RTD Request: {0} from {1} @ {2} ID:{3}",
request.Instrument.Symbol,
request.Instrument.Datasource.Name,
Enum.GetName(typeof(BarSize), request.Frequency),
reqID));
//add the request to the active streams, though it's not necessarily active yet
var streamInfo = new RealTimeStreamInfo(
request.Instrument,
reqID,
request.Instrument.Datasource.Name,
request.Frequency,
request.RTHOnly);
lock (_activeStreamsLock)
{
ActiveStreams.TryAdd(streamInfo);
}
lock (_subscriberCountLock)
{
StreamSubscribersCount.Add(streamInfo, 1);
}
}
public WriteQueue(Stream stream, ActiveStreams streams, bool isPriorityTurnedOn)
{
if (stream == null)
throw new ArgumentNullException("io stream is null");
if (streams == null)
throw new ArgumentNullException("streams collection is null");
//Priorities are turned on for debugging
IsPriorityTurnedOn = isPriorityTurnedOn;
_streams = streams;
if (IsPriorityTurnedOn)
{
_messageQueue = new PriorityQueue();
}
else
{
_messageQueue = new QueueWrapper();
}
_stream = stream;
_disposed = false;
}
public Http2Session(Stream stream, ConnectionEnd end,
bool usePriorities, bool useFlowControl, bool isSecure,
CancellationToken cancel,
int initialWindowSize = Constants.InitialFlowControlWindowSize,
int maxConcurrentStreams = Constants.DefaultMaxConcurrentStreams)
{
if (stream == null)
throw new ArgumentNullException("stream is null");
if (cancel == null)
throw new ArgumentNullException("cancellation token is null");
if (maxConcurrentStreams <= 0)
throw new ArgumentOutOfRangeException("maxConcurrentStreams cant be less or equal then 0");
if (initialWindowSize <= 0 && useFlowControl)
throw new ArgumentOutOfRangeException("initialWindowSize cant be less or equal then 0");
_ourEnd = end;
_usePriorities = usePriorities;
_useFlowControl = useFlowControl;
_isSecure = isSecure;
_cancelSessionToken = cancel;
if (_ourEnd == ConnectionEnd.Client)
{
_remoteEnd = ConnectionEnd.Server;
_lastId = -1; // Streams opened by client are odd
//if we got unsecure connection then server will respond with id == 1. We cant initiate
//new stream with id == 1.
if (!(stream is SslStream))
{
_lastId = 3;
}
}
else
{
_remoteEnd = ConnectionEnd.Client;
_lastId = 0; // Streams opened by server are even
}
_goAwayReceived = false;
_comprProc = new CompressionProcessor(_ourEnd);
_ioStream = stream;
_frameReader = new FrameReader(_ioStream);
ActiveStreams = new ActiveStreams();
_writeQueue = new WriteQueue(_ioStream, ActiveStreams, _comprProc, _usePriorities);
OurMaxConcurrentStreams = maxConcurrentStreams;
RemoteMaxConcurrentStreams = maxConcurrentStreams;
InitialWindowSize = initialWindowSize;
_flowControlManager = new FlowControlManager(this);
if (!_useFlowControl)
{
_flowControlManager.Options = (byte) FlowControlOptions.DontUseFlowControl;
}
SessionWindowSize = 0;
_headersSequences = new HeadersSequenceList();
_promisedResources = new Dictionary<int, string>();
}
/// <summary>
/// This method is called when the continuous futures broker returns the results of a request for the "front"
/// contract of a continuous futures instrument.
/// </summary>
private void _cfBroker_FoundFrontContract(object sender, FoundFrontContractEventArgs e)
{
RealTimeDataRequest request;
if (!e.Instrument.ID.HasValue)
{
Log(LogLevel.Error, "CF Broker returned front contract with no ID");
return;
}
Log(LogLevel.Info, string.Format("Front contract received on request ID {0}, is: {1}", e.ID, e.Instrument.Symbol));
//grab the original request
lock (_cfRequestLock)
{
request = _pendingCFRealTimeRequests[e.ID];
_pendingCFRealTimeRequests.Remove(e.ID);
}
//add the contract to the ID map
if (request.Instrument.ID.HasValue &&
!_continuousFuturesIDMap.ContainsKey(request.Instrument.ID.Value))
{
_continuousFuturesIDMap.Add(request.Instrument.ID.Value, e.Instrument.ID.Value);
}
//add the alias
lock (_aliasLock)
{
int contractID = e.Instrument.ID.Value;
if (!_aliases.ContainsKey(contractID))
{
_aliases.Add(contractID, new List <int>());
}
if (request.Instrument.ID.HasValue)
{
_aliases[contractID].Add(request.Instrument.ID.Value);
}
}
//need to check if there's already a stream of the contract....
bool streamExists;
lock (_activeStreamsLock)
{
streamExists = ActiveStreams.Collection.Any(x => x.Instrument.ID == e.Instrument.ID);
}
if (streamExists)
{
//all we need to do in this case is increment the number of subscribers to this stream
IncrementSubscriberCount(e.Instrument);
//log it
Log(LogLevel.Info,
string.Format("RTD Request for CF {0} @ {1} {2}, filled by existing stream of symbol {3}.",
request.Instrument.Symbol,
request.Instrument.Datasource.Name,
Enum.GetName(typeof(BarSize), request.Frequency),
e.Instrument.Symbol));
}
else //no current stream of this contract, add it
{
//make the request
var contractRequest = (RealTimeDataRequest)request.Clone();
contractRequest.Instrument = e.Instrument; //we take the original request, and substitute the CF for the front contract
ForwardRTDRequest(contractRequest);
//add the request to the active streams, though it's not necessarily active yet
var streamInfo = new RealTimeStreamInfo(
request.Instrument,
-1,
request.Instrument.Datasource.Name,
request.Frequency,
request.RTHOnly);
lock (_activeStreamsLock)
{
ActiveStreams.TryAdd(streamInfo);
}
lock (_subscriberCountLock)
{
StreamSubscribersCount.Add(streamInfo, 1);
}
//log it
Log(LogLevel.Info,
string.Format("RTD Request for CF: {0} from {1} @ {2}, filled by contract: {3}",
request.Instrument.Symbol,
request.Instrument.Datasource.Name,
Enum.GetName(typeof(BarSize), request.Frequency),
e.Instrument.Symbol));
}
}
