velox.api.layer1.layers.strategies.interfaces

Interface OnlineCalculatable

public interface OnlineCalculatable

Strategy implementing this interfaces should support 2 types of requests. 1. Calculate value for given time points 2. Calculate value on fly when receiving new updates Calculated value can be any object Bottom panel will currently work with Double objects representing current value

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	OnlineCalculatable.Marker If passed as value it will cause marker to be drawn at that place (currently works only for Layer1ApiUserMessageModifyIndicator.GraphType.PRIMARY).
static class	OnlineCalculatable.ValueBundle

Method Summary

Modifier and Type	Method and Description
default boolean	allowPartialUpdates(java.lang.String indicatorName, java.lang.String alias)
void	calculateValuesInRange(java.lang.String indicatorName, java.lang.String indicatorAlias, long t0, long intervalWidth, int intervalsNumber, CalculatedResultListener listener) 1st request type: Should calculate left to right values in given time points t0; t0 + intervalWidth; t0 + 2 * intervalWidth ...
OnlineValueCalculatorAdapter	createOnlineValueCalculator(java.lang.String indicatorName, java.lang.String indicatorAlias, long time, java.util.function.Consumer<java.lang.Object> listener, InvalidateInterface invalidateInterface) 2nd request type:

Method Detail

calculateValuesInRange

void calculateValuesInRange(java.lang.String indicatorName,
                            java.lang.String indicatorAlias,
                            long t0,
                            long intervalWidth,
                            int intervalsNumber,
                            CalculatedResultListener listener)

1st request type: Should calculate left to right values in given time points t0; t0 + intervalWidth; t0 + 2 * intervalWidth ... t0 + (intervalsNumber - 1) * intervalWidh)

Parameters:

indicatorName - name of indicator

indicatorAlias - alias of this indicator

t0 - time of 1st value (in ns)

intervalWidth - width of one calculated interval (in ns)

intervalsNumber - number of values to calculate, >= 0

listener -

createOnlineValueCalculator

OnlineValueCalculatorAdapter createOnlineValueCalculator(java.lang.String indicatorName,
                                                         java.lang.String indicatorAlias,
                                                         long time,
                                                         java.util.function.Consumer<java.lang.Object> listener,
                                                         InvalidateInterface invalidateInterface)

2nd request type:

Parameters:

indicatorName - name of indicator

indicatorAlias - alias of this indicator

time - starting with this time values are computed online

listener - can be used in following ways:
a) you can return generated events via listener (see CalculatedResultListener.provideResponse(Object) for supported object types
b) you can use IndicatorFullValues to fully update historical values of your indicator

invalidateInterface - can be used to invalidate indicator

Returns:

value calculator for this strategy

allowPartialUpdates

default boolean allowPartialUpdates(java.lang.String indicatorName,
                                    java.lang.String alias)

Parameters:

indicatorName - name of indicator

alias - alias of this indicator Override you want your indicator to receive only full chart range requests (i.e. you don't want to receive 0-1000 pixels request, and then 1000-1020 request to catch up with chart)

Returns:

true if you allow partial requests (default implementation), false otherwise