This method will be invoked once when/if a Future that this callback is registered on becomes completed with a failure
This method will be invoked once when/if a Future that this callback is registered on becomes completed with a failure
(onFailure: StringAdd).self
(onFailure: StringFormat).self
(onFailure: ArrowAssoc[OnFailure]).x
(Since version 2.10.0) Use leftOfArrow
instead
(onFailure: Ensuring[OnFailure]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
Callback for when a Future is completed with a failure SAM (Single Abstract Method) class
Java API