Composing Future and Try

Question

This is a follow-up to my previous question

Suppose I have a function, which returns a Future[String], and a function String => Try[Int]:

val slowAsync : Int => Future[String] = ...
val mayFail   : String => Try[Int] = ...

Suppose I am composing them to make a new function Int => Future[Int]:

val composed : Int => Future[Int] = {x => 
  for (str <- slowAsync(x); y <- Future(mayFail(s).get)) yield y
} 

The composed is probably working but I don't like this Future(mayFail(s).get). How would you fix it?

Answer 1

You can use fromTry:

val x = slowAsync(1) flatMap (s => Future.fromTry(mayFail(s)))