Map a Future for both Success and Failure

Question

I have a Future[T] and I want to map the result, on both success and failure.

Eg, something like

val future = ... // Future[T]
val mapped = future.mapAll         


        

Answer 1

Since Scala 2.12 you can use transform to map both cases:

future.transform {
      case Success(_) => Try("OK")
      case Failure(_) => Try("KO")
}

You also have transformWith if you prefer to use a Future instead of a Try. Check the documentation for details.