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DataFlow refactoring

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This commit is contained in:
Michael Schimmel
2025-07-23 20:14:24 +02:00
parent b623be13fa
commit 7b2446b220
6 changed files with 260 additions and 486 deletions
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AuraTrader/MainForm.pas
+36 -252
View File
@@ -111,7 +111,6 @@ type
procedure NewWorkspace;
function CurrLayout<T: TControl>: T;
procedure AlignControl(Control: TControl);
function CreateStrategy1(Timeframe: TTimeframe): IMycProcessor<TDataPoint<TOhlcItem>>;
function CreateStrategy2(Timeframe: TTimeframe): IMycProcessor<TDataPoint<TOhlcItem>>;
published
@@ -286,221 +285,6 @@ begin
Control.Align := TAlignLayout.Top;
end;
function TForm1.CreateStrategy1(Timeframe: TTimeframe): IMycProcessor<TDataPoint<TOhlcItem>>;
type
TSignal = record
Sig: Double;
SL: Double;
Entry: Double;
pnl: Double;
end;
var
panel: TMycChart.TPanel;
begin
var ticker := TConverter.CreateIdentity<TDataPoint<TOhlcItem>>;
Result := ticker;
var OhlcPoint := ticker.Chain<TDataPoint<TOhlcItem>>(TConverter.CreateOhlcAggregation(Timeframe));
var Ohlc := TConverter.CreateSequence<TOhlcItem>(2, OhlcPoint.Field<TOhlcItem>('Data').Sender);
var Closes := Ohlc[0].Field<Double>('Close');
var Hull := Closes.Chain<Double>(TIndicators.CreateHMA(250)).MakeParallel;
var Sma := Closes.Chain<Double>(TIndicators.CreateSMA(200)).MakeParallel;
var Lowest: Double := Double.MaxValue;
var Highest: Double := Double.MinValue;
var ATR := Ohlc[0].Chain<Double>(TIndicators.CreateATR(50)).MakeParallel;
// next stage
var ATREndPoint := TConverter.CreateEndpoint<Double>(ATR.Sender, 5);
var ATRSeries: TSeries<Double>;
var HullEndPoint := TConverter.CreateEndpoint<Double>(Hull.Sender, 5);
var HullSeries: TSeries<Double>;
var SmaEndPoint := TConverter.CreateEndpoint<Double>(Sma.Sender, 5);
var SmaSeries: TSeries<Double>;
var curr: TSignal;
curr.SL := Double.NaN;
curr.Entry := Double.NaN;
var Signal :=
Ohlc[1]
.Chain<TSignal>(
function(const Ohlc: TOhlcItem): TSignal
begin
if Ohlc.Low < Lowest then
Lowest := Ohlc.Low;
if Ohlc.High > Highest then
Highest := Ohlc.High;
Result := curr;
Result.Sig := 0;
var pnl: double := NaN;
ATREndPoint.Update(ATRSeries);
HullEndPoint.Update(HullSeries);
SmaEndPoint.Update(SmaSeries);
if (HullSeries[0] < SmaSeries[0]) and (HullSeries[1] >= SmaSeries[1]) then
begin
if curr.Sig > 0 then
pnl := Ohlc.Close - curr.Entry;
curr.Sig := -1;
curr.SL := Highest;
curr.Entry := Ohlc.Close;
Result := curr;
end
else if (HullSeries[0] > SmaSeries[0]) and (HullSeries[1] <= SmaSeries[1]) then
begin
if curr.Sig < 0 then
pnl := curr.Entry - Ohlc.Close;
curr.Sig := 1;
curr.SL := Lowest;
curr.Entry := Ohlc.Close;
Result := curr;
end;
var atr := 15 * ATRSeries[0];
if curr.Sig > 0 then
begin
if Ohlc.Close > curr.SL then
begin
if curr.SL < Ohlc.Close - atr then
curr.SL := Ohlc.Close - atr;
Result.SL := curr.SL;
end;
if Ohlc.Low <= curr.SL then
begin
pnl := curr.SL - curr.Entry;
curr.Sig := 0;
Result.Sig := 0;
curr.SL := NaN;
end;
end
else if curr.Sig < 0 then
begin
if Ohlc.Close < curr.SL then
begin
if curr.SL > Ohlc.Close + atr then
curr.SL := Ohlc.Close + atr;
Result.SL := curr.SL;
end;
if Ohlc.High >= curr.SL then
begin
pnl := curr.Entry - curr.SL;
curr.Sig := 0;
Result.Sig := 0;
curr.SL := NaN;
end;
end;
if Result.Sig <> 0 then
begin
Lowest := Double.MaxValue;
Highest := Double.MinValue;
Result.SL := Double.NaN;
Result.Entry := Double.NaN;
end;
Result.pnl := pnl;
end);
var pnl := Signal.Field<Double>('pnl');
var FEquity: Double;
var FInit: Boolean;
var equity :=
TConverter<Double, Double>.CreateAggregation(
function(const Value: Double; const Broadcast: TConverter<Double, Double>.TBroadcastProc): TState
begin
if not FInit then
begin
FInit := true;
Broadcast(FEquity);
end;
if not IsNan(Value) then
begin
FEquity := FEquity + Value;
Result := Broadcast(FEquity);
end;
end
);
// var equity: TConverter<Double, Double> := TEquitySum.Create(10000);
pnl.Sender.Link(equity);
var Layout := CurrLayout<TVertScrollBox>;
if Layout = nil then
exit;
var Symbol := SelectedSymbol;
if Symbol = '' then
exit;
var chart := TMycChart.Create(Self);
AlignControl(chart);
chart.Height := Layout.ChildrenRect.Width * 9 / 16;
chart.Lookback.Value := 50000;
chart.SetXAxisSeries(M15, OhlcPoint.Field<TDateTime>('Time').Sender);
panel := chart.AddPanel;
panel.AddOhlcSeries(Ohlc[0].Sender);
panel.AddDoubleSeries(Hull.Sender, TAlphaColors.Cornflowerblue, 2);
panel.AddDoubleSeries(Sma.Sender, TAlphaColors.Brown, 1.5);
panel.AddDoubleSeries(Signal.Field<Double>('Entry').Sender, TAlphaColors.Green, 1);
panel.AddDoubleSeries(Signal.Field<Double>('SL').Sender, TAlphaColors.Red, 2);
var mean := TConverter<TArray<Double>, Double>.CreateGeneric(TIndicators.CreateMean());
TConverter.Join<Double>([Hull.Sender, Sma.Sender]).Link(mean);
panel.AddDoubleSeries(mean.Sender, TAlphaColors.Blue, 5);
var pnlChart := TMycChart.Create(Self);
AlignControl(pnlChart);
pnlChart.Height := Layout.ChildrenRect.Width * 9 / 24;
pnlChart.Lookback.Value := 50000;
pnlChart.SetXAxisCounter<Double>(equity.Sender);
////////////
var EMAFactory := TEMA.Create;
var Params := TDataRecord.Create(EMAFactory.Params);
Params.SetValue<Integer>('Period', 20);
var indi := EMAFActory.CreateIndicator(Params);
var EMAConv := TConverter<TDataRecord, TDataRecord>.CreateGeneric(indi);
var equityEMA :=
equity
.Chain<TDataRecord>(TConverter.FieldToRecord<Double>(EMAFactory.Input, 'Price'))
.Chain<TDataRecord>(EMAConv)
.Chain<Double>(TConverter.FieldOfRecord<Double>(EMAFactory.Output, 'MA'));
//////////////
panel := pnlChart.AddPanel;
panel.AddDoubleSeries(equity.Sender, TAlphaColors.Blue, 3);
panel.AddDoubleSeries(equityEMA.Sender, TAlphaColors.Gray, 2);
/////
end;
function TForm1.CreateStrategy2(Timeframe: TTimeframe): IMycProcessor<TDataPoint<TOhlcItem>>;
type
TSignal = record
@@ -515,7 +299,7 @@ begin
var ticker := TConverter.CreateIdentity<TDataPoint<TOhlcItem>>;
Result := ticker;
var OhlcPoint := ticker.Chain<TDataPoint<TOhlcItem>>(TConverter.CreateOhlcAggregation(Timeframe));
var OhlcPoint := ticker.Sender.Chain<TDataPoint<TOhlcItem>>(TConverter.CreateOhlcAggregation(Timeframe));
var Ohlc := OhlcPoint.Field<TOhlcItem>('Data');
@@ -531,13 +315,13 @@ begin
// next stage
var ATREndPoint := TConverter.CreateEndpoint<Double>(ATR.Sender, 5);
var ATREndPoint := ATR.CreateEndpoint(5);
var ATRSeries: TSeries<Double>;
var HullEndPoint := TConverter.CreateEndpoint<Double>(Hull.Sender, 5);
var HullEndPoint := Hull.CreateEndpoint(5);
var HullSeries: TSeries<Double>;
var SmaEndPoint := TConverter.CreateEndpoint<Double>(Sma.Sender, 5);
var SmaEndPoint := Sma.CreateEndpoint(5);
var SmaSeries: TSeries<Double>;
var curr: TSignal;
@@ -546,10 +330,7 @@ begin
var lastHull, lastSma: Double;
var conv :=
TConverter.Join<Double>(
[Ohlc.Field<Double>('Low').Sender, Ohlc.Field<Double>('High').Sender, Closes.Sender, ATR.Sender, Hull.Sender, Sma.Sender]
);
var conv := TConverter.Join<Double>([Ohlc.Field<Double>('Low'), Ohlc.Field<Double>('High'), Closes, ATR, Hull, Sma]);
var Signal :=
TConverter<TArray<Double>, TSignal>.CreateGeneric(
@@ -643,9 +424,9 @@ begin
end
);
conv.Link(Signal);
conv.Chain<TSignal>(Signal);
var pnl := Signal.Field<Double>('pnl');
var pnl := Signal.Sender.Field<Double>('pnl');
var FEquity: Double := 10000;
var FInit: Boolean := false;
@@ -668,7 +449,7 @@ begin
end
);
pnl.Sender.Link(equity);
pnl.Chain<Double>(equity);
var Layout := CurrLayout<TVertScrollBox>;
if Layout = nil then
@@ -683,18 +464,18 @@ begin
chart.Height := Layout.ChildrenRect.Width * 9 / 16;
chart.Lookback.Value := 50000;
chart.SetXAxisSeries(M15, OhlcPoint.Field<TDateTime>('Time').Sender);
chart.SetXAxisSeries(M15, OhlcPoint.Field<TDateTime>('Time'));
panel := chart.AddPanel;
panel.AddOhlcSeries(Ohlc.Sender);
panel.AddDoubleSeries(Hull.Sender, TAlphaColors.Cornflowerblue, 2);
panel.AddDoubleSeries(Sma.Sender, TAlphaColors.Brown, 1.5);
panel.AddDoubleSeries(Signal.Field<Double>('Entry').Sender, TAlphaColors.Green, 1);
panel.AddDoubleSeries(Signal.Field<Double>('SL').Sender, TAlphaColors.Red, 2);
panel.AddOhlcSeries(Ohlc);
panel.AddDoubleSeries(Hull, TAlphaColors.Cornflowerblue, 2);
panel.AddDoubleSeries(Sma, TAlphaColors.Brown, 1.5);
panel.AddDoubleSeries(Signal.Sender.Field<Double>('Entry'), TAlphaColors.Green, 1);
panel.AddDoubleSeries(Signal.Sender.Field<Double>('SL'), TAlphaColors.Red, 2);
var mean := TConverter<TArray<Double>, Double>.CreateGeneric(TIndicators.CreateMean());
TConverter.Join<Double>([Hull.Sender, Sma.Sender]).Link(mean);
TConverter.Join<Double>([Hull, Sma]).Chain<Double>(mean);
panel.AddDoubleSeries(mean.Sender, TAlphaColors.Blue, 5);
@@ -717,6 +498,7 @@ begin
var equityEMA :=
equity
.Sender
.Chain<TDataRecord>(TConverter.FieldToRecord<Double>(EMAFactory.Input, 'Price'))
.Chain<TDataRecord>(EMAConv)
.Chain<Double>(TConverter.FieldOfRecord<Double>(EMAFactory.Output, 'MA'));
@@ -725,7 +507,7 @@ begin
panel := pnlChart.AddPanel;
panel.AddDoubleSeries(equity.Sender, TAlphaColors.Blue, 3);
panel.AddDoubleSeries(equityEMA.Sender, TAlphaColors.Gray, 2);
panel.AddDoubleSeries(equityEMA, TAlphaColors.Gray, 2);
/////
end;
@@ -791,7 +573,7 @@ begin
var ticker := TConverter.CreateTicker<TDataPoint<TOhlcItem>>;
ticker.Sender.Link(Processor);
ticker.Sender.Chain(Processor);
FProcessDone := FProcessDone + FServer.ProcessData(Symbol, terminated, ticker);
{$endif}
@@ -823,7 +605,9 @@ begin
/////
var OhlcPoint := TConverter.CreateIdentity<TDataPoint<TOhlcItem>>;
var OhlcTicker := TConverter.CreateIdentity<TDataPoint<TOhlcItem>>;
var OhlcPoint := OhlcTicker.Sender;
var timeframe := TTimeframe.H;
@@ -839,28 +623,28 @@ begin
var Macd := Closes.MakeParallel.Chain<TMacdResult>(TIndicators.CreateMACD(12, 26, 9));
var Stoch := Ohlc.MakeParallel.Chain<TStochasticResult>(TIndicators.CreateStochastic(14, 3));
chart.SetXAxisSeries(timeframe, Timestamps.Sender);
chart.SetXAxisSeries(timeframe, Timestamps);
var Panel := chart.AddPanel;
Panel.AddOhlcSeries(Ohlc.Sender);
Panel.AddDoubleSeries(Hull.Sender, TAlphaColors.Aliceblue);
Panel.AddDoubleSeries(Sma.Sender, TAlphaColors.Yellow);
Panel.AddDoubleSeries(Ema.Sender, TAlphaColors.Aqua);
Panel.AddDoubleSeries(Boli.Field<Double>('UpperBand').Sender, TAlphaColors.Gray);
Panel.AddDoubleSeries(Boli.Field<Double>('MiddleBand').Sender, TAlphaColors.Darkgray, 1.0);
Panel.AddDoubleSeries(Boli.Field<Double>('LowerBand').Sender, TAlphaColors.Gray);
Panel.AddOhlcSeries(Ohlc);
Panel.AddDoubleSeries(Hull, TAlphaColors.Aliceblue);
Panel.AddDoubleSeries(Sma, TAlphaColors.Yellow);
Panel.AddDoubleSeries(Ema, TAlphaColors.Aqua);
Panel.AddDoubleSeries(Boli.Field<Double>('UpperBand'), TAlphaColors.Gray);
Panel.AddDoubleSeries(Boli.Field<Double>('MiddleBand'), TAlphaColors.Darkgray, 1.0);
Panel.AddDoubleSeries(Boli.Field<Double>('LowerBand'), TAlphaColors.Gray);
Panel := chart.AddPanel;
Panel.AddDoubleSeries(Rsi.Sender, TAlphaColors.Fuchsia);
Panel.AddDoubleSeries(Rsi, TAlphaColors.Fuchsia);
Panel := chart.AddPanel;
Panel.AddDoubleSeries(Macd.Field<Double>('MacdLine').Sender, TAlphaColors.Orange);
Panel.AddDoubleSeries(Macd.Field<Double>('SignalLine').Sender, TAlphaColors.Dodgerblue);
Panel.AddDoubleSeries(Macd.Field<Double>('Histogram').Sender, TAlphaColors.Lightgreen);
Panel.AddDoubleSeries(Macd.Field<Double>('MacdLine'), TAlphaColors.Orange);
Panel.AddDoubleSeries(Macd.Field<Double>('SignalLine'), TAlphaColors.Dodgerblue);
Panel.AddDoubleSeries(Macd.Field<Double>('Histogram'), TAlphaColors.Lightgreen);
Panel := chart.AddPanel;
Panel.AddDoubleSeries(Stoch.Field<Double>('K').Sender, TAlphaColors.Green);
Panel.AddDoubleSeries(Stoch.Field<Double>('D').Sender, TAlphaColors.Red);
Panel.AddDoubleSeries(Stoch.Field<Double>('K'), TAlphaColors.Green);
Panel.AddDoubleSeries(Stoch.Field<Double>('D'), TAlphaColors.Red);
/////
{
@@ -887,7 +671,7 @@ begin
}
/////
ExecuteStrategy(Symbol, timeframe, OhlcPoint);
ExecuteStrategy(Symbol, timeframe, OhlcTicker);
end;
procedure TForm1.Strat2ButtonClick(Sender: TObject);
AuraTrader/StrategyTest.pas
+10 -13
View File
@@ -10,7 +10,7 @@ uses
Myc.DataRecord,
Myc.Trade.Indicators;
function CreateStrategy1(Timeframe: TTimeframe): TConverter<TDataPoint<TOhlcItem>, Double>;
function CreateStrategy1(Timeframe: TTimeframe): TConverter<TDataPoint<TOhlcItem>, Double>; overload;
implementation
@@ -30,7 +30,7 @@ type
begin
var ticker := TConverter.CreateIdentity<TDataPoint<TOhlcItem>>;
var OhlcPoint := ticker.Chain<TDataPoint<TOhlcItem>>(TConverter.CreateOhlcAggregation(Timeframe));
var OhlcPoint := ticker.Sender.Chain<TDataPoint<TOhlcItem>>(TConverter.CreateOhlcAggregation(Timeframe));
var Ohlc := OhlcPoint.Field<TOhlcItem>('Data');
@@ -40,10 +40,7 @@ begin
var Sma := Closes.Chain<Double>(TIndicators.CreateSMA(200)).MakeParallel;
var ATR := Ohlc.Chain<Double>(TIndicators.CreateATR(50)).MakeParallel;
var conv :=
TConverter.Join<Double>(
[Ohlc.Field<Double>('Low').Sender, Ohlc.Field<Double>('High').Sender, Closes.Sender, ATR.Sender, Hull.Sender, Sma.Sender]
);
var conv := TConverter.Join<Double>([Ohlc.Field<Double>('Low'), Ohlc.Field<Double>('High'), Closes, ATR, Hull, Sma]);
// STAGE 1: Signal Generation. This converter is stateless regarding the trade itself.
// It only detects the crossover event and prepares the data for the next stage.
@@ -52,6 +49,7 @@ begin
var lastHull, lastSma: Double;
var signalGenerator :=
conv.Chain<TSignalEvent>(
TConverter<TArray<Double>, TSignalEvent>.CreateGeneric(
function(const Values: TArray<Double>): TSignalEvent
begin
@@ -88,6 +86,7 @@ begin
lastHull := hull;
lastSma := sma;
end
)
);
// STAGE 2: Position Management. This stateful converter manages the lifecycle
@@ -98,6 +97,7 @@ begin
var currEntry := Double.NaN;
var positionManager :=
signalGenerator.Chain<Double>(
TConverter<TSignalEvent, Double>.CreateAggregation(
function(const Value: TSignalEvent; const Broadcast: TConverter<TSignalEvent, Double>.TBroadcastProc): TState
var
@@ -157,16 +157,14 @@ begin
Broadcast(pnl);
end;
end
)
);
// Chain the stages together
conv.Link(signalGenerator);
signalGenerator.Sender.Link(positionManager);
// The final equity calculation remains the same, it just consumes the PnL from the position manager
var FEquity: Double := 10000;
var FInit: Boolean := false;
var equity :=
positionManager.Chain<Double>(
TConverter<Double, Double>.CreateAggregation(
function(const Value: Double; const Broadcast: TConverter<Double, Double>.TBroadcastProc): TState
begin
@@ -182,11 +180,10 @@ begin
Result := Broadcast(FEquity);
end;
end
)
);
positionManager.Sender.Link(equity);
Result := TConverter<TDataPoint<TOhlcItem>, Double>.Construct(ticker, equity.Sender);
Result := TConverter<TDataPoint<TOhlcItem>, Double>.Construct(ticker, equity);
end;
end.
Src/Myc.Fmx.Chart.Series.pas
+2 -2
View File
@@ -272,7 +272,7 @@ begin
inherited Create(AParent);
FDataProvider := ADataProvider;
FReceiver := TConverter.CreateEndpoint<T>(FDataProvider, Owner.Lookback.Value);
FReceiver := FDataProvider.CreateEndpoint(Owner.Lookback.Value);
end;
function TChartCustomLayer<T>.GetCount: Int64;
@@ -296,7 +296,7 @@ constructor TChartXAxisLayer<T>.Create(AOwner: TMycChart; const ADataProvider: T
begin
inherited Create(AOwner);
FDataProvider := ADataProvider;
FReceiver := TConverter.CreateEndpoint<T>(FDataProvider, Owner.Lookback.Value);
FReceiver := FDataProvider.CreateEndpoint(Owner.Lookback.Value);
end;
function TChartXAxisLayer<T>.GetCaption(Idx: Int64): String;
Src/Myc.Fmx.Chart.pas
+1 -3
View File
@@ -636,9 +636,7 @@ function TMycChart.SetXAxisCounter<T>(const DataProvider: TDataProvider<T>): TMy
begin
FXAxisSeries.Free;
var counter := TConverter.CreateCounter<T>;
DataProvider.Link(counter);
FXAxisSeries := TChartXAxisLayer<Int64>.Create(Self, counter.Sender);
FXAxisSeries := TChartXAxisLayer<Int64>.Create(Self, DataProvider.Chain<Int64>(TConverter.CreateCounter<T>));
Result := FXAxisSeries;
end;
Src/Myc.Trade.DataPoint.Impl.pas
+26 -27
View File
@@ -22,7 +22,7 @@ type
end;
// Concrete data provider that manages a list of processors (listeners).
TMycContainedDataProvider<T> = class abstract(TContainedObject, TDataProvider<T>.IDataProvider)
TMycContainedDataProvider<T> = class abstract(TContainedObject, IDataProvider<T>)
private
FListeners: TMycNotifyList<IMycProcessor<T>>;
public
@@ -31,9 +31,9 @@ type
// Notifies all linked processors.
function Broadcast(const Value: T): TState;
// Link a Processor
function Link(const Processor: IMycProcessor<T>): TDataProvider<T>.TTag;
function Link(const Processor: IMycProcessor<T>): TTag;
// Unlink a linked strategy
procedure Unlink(Tag: TDataProvider<T>.TTag);
procedure Unlink(Tag: TTag);
end;
TMycSequence<T> = class(TMycProcessor<T>, IMycDataSequence<T>)
@@ -50,17 +50,17 @@ type
end;
// Null object implementation for IDataProvider.
TNullDataProvider<T> = class(TInterfacedObject, TDataProvider<T>.IDataProvider)
TNullDataProvider<T> = class(TInterfacedObject, IDataProvider<T>)
public
function Link(const Receiver: IMycProcessor<T>): TDataProvider<T>.TTag;
procedure Unlink(Tag: TDataProvider<T>.TTag);
function Link(const Receiver: IMycProcessor<T>): TTag;
procedure Unlink(Tag: TTag);
end;
// Abstract base class for components that process data of type S and provide data of type T.
TMycConverter<S, T> = class abstract(TMycProcessor<S>, TConverter<S, T>.IConverter)
TMycConverter<S, T> = class abstract(TMycProcessor<S>, IConverter<S, T>)
private
FSender: TMycContainedDataProvider<T>;
function GetSender: TDataProvider<T>.IDataProvider;
function GetSender: IDataProvider<T>;
protected
function ProcessData(const Value: S): TState; override; abstract;
// Broadcasts the given data to all linked processors.
@@ -68,13 +68,13 @@ type
public
constructor Create;
destructor Destroy; override;
property Sender: TDataProvider<T>.IDataProvider read GetSender;
property Sender: IDataProvider<T> read GetSender;
end;
// Null object implementation for IConverter.
TNullConverter<S, T> = class(TInterfacedObject, TConverter<S, T>.IConverter)
TNullConverter<S, T> = class(TInterfacedObject, IConverter<S, T>)
private
function GetSender: TDataProvider<T>.IDataProvider;
function GetSender: IDataProvider<T>;
public
function ProcessData(const Value: S): TState;
end;
@@ -174,8 +174,8 @@ type
end;
private
FProcessor: TMycContainedProcessor<T>;
FTag: TDataProvider<T>.TTag;
FDataProvider: TDataProvider<T>;
FTag: TTag;
FDataProvider: IDataProvider<T>;
FLookback: Int64;
FChanged: TFlag;
FLock: TLightweightMREW;
@@ -225,12 +225,12 @@ type
end;
// Endpoint that collects data into a series.
TMycDataJoin<T> = class(TInterfacedObject, TDataProvider<TArray<T>>.IDataProvider)
TMycDataJoin<T> = class(TInterfacedObject, IDataProvider<TArray<T>>)
private
FReceivers: array of record
DataProvider: TDataProvider<T>;
DataProvider: IDataProvider<T>;
Processor: TMycContainedProcessor<T>;
Tag: TDataProvider<T>.TTag;
Tag: TTag;
Queue: TQueue<T>;
end;
@@ -241,16 +241,16 @@ type
public
constructor Create(const ADataProviders: TArray<TDataProvider<T>>);
destructor Destroy; override;
property Sender: TMycContainedDataProvider<TArray<T>> read FSender implements TDataProvider<TArray<T>>.IDataProvider;
property Sender: TMycContainedDataProvider<TArray<T>> read FSender implements IDataProvider<TArray<T>>;
end;
TMycComposedConverter<S, T> = class(TMycProcessor<S>, TConverter<S, T>.IConverter)
TMycComposedConverter<S, T> = class(TMycProcessor<S>, IConverter<S, T>)
private
FProcessor: IMycProcessor<S>;
FDataProvider: TDataProvider<T>;
protected
function ProcessData(const Value: S): TState; override;
function GetSender: TDataProvider<T>.IDataProvider;
function GetSender: IDataProvider<T>;
public
constructor Create(const AProcessor: IMycProcessor<S>; const ADataProvider: TDataProvider<T>);
end;
@@ -314,7 +314,7 @@ begin
end;
end;
function TMycContainedDataProvider<T>.Link(const Processor: IMycProcessor<T>): TDataProvider<T>.TTag;
function TMycContainedDataProvider<T>.Link(const Processor: IMycProcessor<T>): TTag;
begin
// Add the Processor to the notification list
FListeners.Lock;
@@ -325,7 +325,7 @@ begin
end;
end;
procedure TMycContainedDataProvider<T>.Unlink(Tag: TDataProvider<T>.TTag);
procedure TMycContainedDataProvider<T>.Unlink(Tag: TTag);
begin
FListeners.Lock;
try
@@ -337,12 +337,12 @@ end;
{ TNullDataProvider<T> }
function TNullDataProvider<T>.Link(const Receiver: IMycProcessor<T>): TDataProvider<T>.TTag;
function TNullDataProvider<T>.Link(const Receiver: IMycProcessor<T>): TTag;
begin
Result := nil;
end;
procedure TNullDataProvider<T>.Unlink(Tag: TDataProvider<T>.TTag);
procedure TNullDataProvider<T>.Unlink(Tag: TTag);
begin
// Do nothing in the null implementation.
end;
@@ -366,14 +366,14 @@ begin
Result := FSender.Broadcast(Value);
end;
function TMycConverter<S, T>.GetSender: TDataProvider<T>.IDataProvider;
function TMycConverter<S, T>.GetSender: IDataProvider<T>;
begin
Result := FSender;
end;
{ TNullConverter<S, T> }
function TNullConverter<S, T>.GetSender: TDataProvider<T>.IDataProvider;
function TNullConverter<S, T>.GetSender: IDataProvider<T>;
begin
Result := TDataProvider<T>.Null;
end;
@@ -499,7 +499,6 @@ begin
FProcessor := TMycContainedProcessor<T>.Create(Self, ProcessData);
FTag := FDataProvider.Link(FProcessor);
end;
destructor TMycDataEndpoint<T>.Destroy;
@@ -930,7 +929,7 @@ begin
FDataProvider := ADataProvider;
end;
function TMycComposedConverter<S, T>.GetSender: TDataProvider<T>.IDataProvider;
function TMycComposedConverter<S, T>.GetSender: IDataProvider<T>;
begin
Result := FDataProvider;
end;
Src/Myc.Trade.DataPoint.pas
+88 -92
View File
@@ -15,38 +15,60 @@ type
function ProcessData(const Value: T): TState;
end;
// Interface helper for IDataProvider providing the null object pattern.
TDataProvider<T> = record
public
type
TTag = Pointer;
IDataProvider = interface
IDataProvider<T> = interface
function Link(const Receiver: IMycProcessor<T>): TTag;
procedure Unlink(Tag: TTag);
end;
IConverter<S, T> = interface(IMycProcessor<S>)
function GetSender: IDataProvider<T>;
property Sender: IDataProvider<T> read GetSender;
end;
// Interface helper for IDataProvider providing the null object pattern.
TDataProvider<T> = record
type
TLink = record
private
FDataProvider: IDataProvider<T>;
FTag: TTag;
public
procedure Unlink;
property DataProvider: IDataProvider<T> read FDataProvider;
end;
strict private
class var
FNull: IDataProvider;
FNull: IDataProvider<T>;
class constructor CreateClass;
private
FDataProvider: IDataProvider;
FDataProvider: IDataProvider<T>;
public
constructor Create(const ADataProvider: IDataProvider);
constructor Create(const ADataProvider: IDataProvider<T>);
// Managed record operators
class operator Initialize(out Dest: TDataProvider<T>);
class operator Implicit(const A: IDataProvider): TDataProvider<T>; overload;
class operator Implicit(const A: TDataProvider<T>): IDataProvider; overload;
class operator Implicit(const A: IDataProvider<T>): TDataProvider<T>; overload;
class operator Implicit(const A: TDataProvider<T>): IDataProvider<T>; overload;
// Wrapper for IMycDataProvider methods
function Link(const Receiver: IMycProcessor<T>): TTag; inline;
procedure Unlink(Tag: TTag); inline;
function Link(const Receiver: IMycProcessor<T>): TLink; inline;
function Chain(const Next: IMycProcessor<T>): IMycProcessor<T>; overload; inline;
function Chain<R>(const Next: IConverter<T, R>): TDataProvider<R>; overload; inline;
function Chain<R>(const Func: TConstFunc<T, R>): TDataProvider<R>; overload; inline;
function CreateEndpoint(Lookback: Int64): TLazy<TSeries<T>>;
// Extracts the field of a record by it's name (using RTTI).
function Field<R>(const FieldName: String): TDataProvider<R>; inline;
function MakeParallel: TDataProvider<T>; inline;
// Provides access to the null object instance.
class property Null: IDataProvider read FNull;
class property Null: IDataProvider<T> read FNull;
end;
IMycDataSequence<T> = interface(IMycProcessor<T>)
@@ -60,57 +82,38 @@ type
TConverter<S, T> = record
public
type
IConverter = interface(IMycProcessor<S>)
{$region 'private'}
function GetSender: TDataProvider<T>.IDataProvider;
{$endregion}
property Sender: TDataProvider<T>.IDataProvider read GetSender;
end;
TBroadcastProc = reference to function(const Value: T): TState;
strict private
class var
FNull: IConverter;
FNull: IConverter<S, T>;
class constructor CreateClass;
private
FConverter: IConverter;
FConverter: IConverter<S, T>;
function GetSender: TDataProvider<T>; inline;
public
constructor Create(const AConverter: IConverter);
constructor Create(const AConverter: IConverter<S, T>);
// Managed record operators
class operator Initialize(out Dest: TConverter<S, T>);
class operator Implicit(const A: IConverter): TConverter<S, T>; overload;
class operator Implicit(const A: TConverter<S, T>): IConverter; overload;
class operator Implicit(const A: IConverter<S, T>): TConverter<S, T>; overload;
class operator Implicit(const A: TConverter<S, T>): IConverter<S, T>; overload;
class function Construct(const Processor: IMycProcessor<S>; const DataProvider: TDataProvider<T>): TConverter<S, T>; static;
class function CreateGeneric(const Func: TConstFunc<S, T>): TConverter<S, T>; static;
class function CreateAggregation(const Func: TConstFunc<S, TBroadcastProc, TState>): TConverter<S, T>; static;
class function CreateParallel(const Func: TConstFunc<S, T>): TConverter<S, T>; static;
function Chain<R>(const Next: TConverter<T, R>): TConverter<T, R>; overload; inline;
function Chain<R>(const Func: TConstFunc<T, R>): TConverter<T, R>; overload; inline;
function ChainParallel<R>(const Func: TConstFunc<T, R>): TConverter<T, R>; overload; inline;
function MakeParallel: TConverter<T, T>; overload; inline;
// Extracts the field of a record by it's name (using RTTI).
function Field<R>(const FieldName: String): TConverter<T, R>; overload; inline;
function Sequence(Count: Integer): IMycDataSequence<T>; overload;
function Sequence(const Items: TArray<IConverter>): IMycDataSequence<S>; overload;
function Sequence(const Items: TArray<IConverter<S, T>>): IMycDataSequence<S>; overload;
// Provides access to the null object instance.
class property Null: IConverter read FNull;
class property Null: IConverter<S, T> read FNull;
// Wrapper for IConverter.Sender
property Sender: TDataProvider<T> read GetSender;
end;
// Factory for creating specific converter instances.
TConverter = record
class function CreateEndpoint<T>(const DataProvider: TDataProvider<T>; Lookback: Int64): TLazy<TSeries<T>>; static;
class function CreateCounter<T>: TConverter<T, Int64>; static;
class function CreateTicker<T>: TConverter<TArray<T>, T>; static;
class function CreateRecordField<S, T>(const FieldName: String): TConverter<S, T>; static;
@@ -123,8 +126,6 @@ type
class function CreateSequence<T>(Count: Integer; const Parent: TDataProvider<T>): TArray<TConverter<T, T>>; overload; static;
class function Parallel<T>(Parent: TDataProvider<T>): TConverter<T, T>; static;
class function FieldToRecord<T>(const Layout: TDataRecord.TLayout; const Name: String): TConverter<T, TDataRecord>; static;
class function FieldOfRecord<T>(const Layout: TDataRecord.TLayout; const Name: String): TConverter<TDataRecord, T>; static;
@@ -163,36 +164,64 @@ begin
FNull := TNullDataProvider<T>.Create;
end;
constructor TDataProvider<T>.Create(const ADataProvider: IDataProvider);
constructor TDataProvider<T>.Create(const ADataProvider: IDataProvider<T>);
begin
FDataProvider := ADataProvider;
if not Assigned(FDataProvider) then
FDataProvider := FNull;
end;
function TDataProvider<T>.Chain(const Next: IMycProcessor<T>): IMycProcessor<T>;
begin
FDataProvider.Link(Next);
Result := Next;
end;
function TDataProvider<T>.Chain<R>(const Next: IConverter<T, R>): TDataProvider<R>;
begin
FDataProvider.Link(Next);
Result := Next.Sender;
end;
function TDataProvider<T>.Chain<R>(const Func: TConstFunc<T, R>): TDataProvider<R>;
begin
Result := Chain<R>(TMycGenericConverter<T, R>.Create(Func));
end;
function TDataProvider<T>.CreateEndpoint(Lookback: Int64): TLazy<TSeries<T>>;
begin
Result := TMycDataEndpoint<T>.Create(FDataProvider, Lookback);
end;
function TDataProvider<T>.Field<R>(const FieldName: String): TDataProvider<R>;
begin
Result := Chain<R>(TMycRecordFieldReader<T, R>.Create(FieldName));
end;
class operator TDataProvider<T>.Initialize(out Dest: TDataProvider<T>);
begin
Dest.FDataProvider := FNull;
end;
class operator TDataProvider<T>.Implicit(const A: IDataProvider): TDataProvider<T>;
class operator TDataProvider<T>.Implicit(const A: IDataProvider<T>): TDataProvider<T>;
begin
Result.Create(A);
end;
class operator TDataProvider<T>.Implicit(const A: TDataProvider<T>): IDataProvider;
class operator TDataProvider<T>.Implicit(const A: TDataProvider<T>): IDataProvider<T>;
begin
Result := A.FDataProvider;
end;
function TDataProvider<T>.Link(const Receiver: IMycProcessor<T>): TTag;
function TDataProvider<T>.Link(const Receiver: IMycProcessor<T>): TLink;
begin
Result := FDataProvider.Link(Receiver);
Result.FDataProvider := FDataProvider;
Result.FTag := FDataProvider.Link(Receiver);
end;
procedure TDataProvider<T>.Unlink(Tag: TTag);
function TDataProvider<T>.MakeParallel: TDataProvider<T>;
begin
FDataProvider.Unlink(Tag);
Result := Chain<T>(TMycParallelConverter<T>.Create as IConverter<T, T>);
end;
{ TConverter<S, T> }
@@ -202,29 +231,13 @@ begin
FNull := TNullConverter<S, T>.Create;
end;
constructor TConverter<S, T>.Create(const AConverter: IConverter);
constructor TConverter<S, T>.Create(const AConverter: IConverter<S, T>);
begin
FConverter := AConverter;
if not Assigned(FConverter) then
FConverter := FNull;
end;
function TConverter<S, T>.Chain<R>(const Next: TConverter<T, R>): TConverter<T, R>;
begin
FConverter.Sender.Link(Next);
Result := Next;
end;
function TConverter<S, T>.Chain<R>(const Func: TConstFunc<T, R>): TConverter<T, R>;
begin
Result := Chain<R>(TMycGenericConverter<T, R>.Create(Func));
end;
function TConverter<S, T>.ChainParallel<R>(const Func: TConstFunc<T, R>): TConverter<T, R>;
begin
Result := Chain<R>(TMycGenericParallelConverter<T, R>.Create(Func));
end;
class function TConverter<S, T>.Construct(const Processor: IMycProcessor<S>; const DataProvider: TDataProvider<T>): TConverter<S, T>;
begin
Result := TMycComposedConverter<S, T>.Create(Processor, DataProvider);
@@ -240,33 +253,18 @@ begin
Result := TMycGenericConverter<S, T>.Create(Func);
end;
class function TConverter<S, T>.CreateParallel(const Func: TConstFunc<S, T>): TConverter<S, T>;
begin
Result := TMycGenericParallelConverter<S, T>.Create(Func);
end;
function TConverter<S, T>.Field<R>(const FieldName: String): TConverter<T, R>;
begin
Result := Chain<R>(TConverter.CreateRecordField<T, R>(FieldName));
end;
function TConverter<S, T>.GetSender: TDataProvider<T>;
begin
Result := FConverter.Sender;
end;
function TConverter<S, T>.MakeParallel: TConverter<T, T>;
begin
Result := Chain<T>(TMycGenericParallelConverter<T, T>.Create(function(const Value: T): T begin Result := Value; end));
end;
function TConverter<S, T>.Sequence(Count: Integer): IMycDataSequence<T>;
begin
Result := TMycSequence<T>.Create(Count);
FConverter.Sender.Link(Result);
end;
function TConverter<S, T>.Sequence(const Items: TArray<IConverter>): IMycDataSequence<S>;
function TConverter<S, T>.Sequence(const Items: TArray<IConverter<S, T>>): IMycDataSequence<S>;
begin
var seq: IMycDataSequence<S> := TMycSequence<S>.Create(Length(Items));
@@ -281,12 +279,12 @@ begin
Dest.FConverter := FNull;
end;
class operator TConverter<S, T>.Implicit(const A: IConverter): TConverter<S, T>;
class operator TConverter<S, T>.Implicit(const A: IConverter<S, T>): TConverter<S, T>;
begin
Result.Create(A);
end;
class operator TConverter<S, T>.Implicit(const A: TConverter<S, T>): IConverter;
class operator TConverter<S, T>.Implicit(const A: TConverter<S, T>): IConverter<S, T>;
begin
Result := A.FConverter;
end;
@@ -316,11 +314,6 @@ begin
);
end;
class function TConverter.CreateEndpoint<T>(const DataProvider: TDataProvider<T>; Lookback: Int64): TLazy<TSeries<T>>;
begin
Result := TMycDataEndpoint<T>.Create(DataProvider, Lookback);
end;
class function TConverter.CreateIdentity<T>: TConverter<T, T>;
begin
Result := TMycIdentityConverter<T>.Create;
@@ -423,10 +416,13 @@ begin
RecProvider.Link(Result);
end;
class function TConverter.Parallel<T>(Parent: TDataProvider<T>): TConverter<T, T>;
procedure TDataProvider<T>.TLink.Unlink;
begin
Result := TMycParallelConverter<T>.Create;
Parent.Link(Result);
if FTag <> nil then
begin
FDataProvider.Unlink(FTag);
FTag := nil;
end;
end;
end.