Composed Scala futures with error-handling

FutureErrorHandler.scala

import scala.util.Random
import scala.concurrent.{ ExecutionContext, Future }
import ExecutionContext.Implicits.global

def okReverse(s: String) = s.reverse

def shittyReverse(s: String) = {
  val r = new Random()
  if (r.nextDouble >= 0.5) {
    throw new Exception("sorry, not today")
  } else {
    okReverse(s)
  }
}

def f1(s: String) = Future { shittyReverse(s) }

def f2(res1: Future[String]) =
  res1 map okReverse recover {
    case t: Throwable => t.getMessage()
  } foreach println

f2(f1("my name is mud"))