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Layer1ApiInstrumentAdapter

source_file: Layer1ApiInstrumentAdapter.html package: velox.api.layer1 classes: Layer1ApiInstrumentAdapter methods: onInstrumentAdded, onInstrumentRemoved, onInstrumentNotFound, onInstrumentAlreadySubscribed extends: ** Layer1ApiInstrumentListener​

Layer1ApiInstrumentAdapter

Package: velox.api.layer1

Type: Interface

All Superinterfaces: Layer1ApiInstrumentListener

All Known Subinterfaces: Layer1ApiAdapter, velox.api.layer1.messages.indicators.StrategyUpdateGenerator

Description​

Provides default empty implementations.

Methods​

onInstrumentAdded​

default void onInstrumentAdded(String alias, InstrumentInfo instrumentInfo)

Indicates successful subscription to the instrument

Parameters:

  • alias - Instrument alias
  • instrumentInfo - Instrument specifications

onInstrumentRemoved​

default void onInstrumentRemoved(String alias)

Unsubscribed from instrument (user-initiated or provider initiated).

Please note that if you use this in strategy that implements OnlineCalculatable, you should not delete any data about instrument that is expected in OnlineCalculatable.calculateValuesInRange(String, String, long, long, int, velox.api.layer1.layers.strategies.interfaces.CalculatedResultListener) or OnlineCalculatable.createOnlineValueCalculator(String, String, long, java.util.function.Consumer, velox.api.layer1.layers.strategies.interfaces.InvalidateInterface), or should handle absence of that data (in case you delete it) gracefully. The reason is that you can get Layer1ApiInstrumentListener.onInstrumentRemoved(String) in the middle of OnlineCalculatable request

Parameters:

  • alias -

onInstrumentNotFound​

default void onInstrumentNotFound(String symbol, String exchange, String type)

Indicates that attempt to subscribe failed because instrument does not exist

Parameters:

  • symbol -
  • exchange -
  • type - See InstrumentCoreInfo.type

onInstrumentAlreadySubscribed​

default void onInstrumentAlreadySubscribed(String symbol, String exchange, String type)

Indicates that attempt to subscribe failed because subscription is already active

Parameters:

  • symbol -
  • exchange -
  • type - See InstrumentCoreInfo.type