Exception handling with Either 1

either_example1.scala

import scala.util.control.Exception._

val r = new java.util.Random
def randomBoolean(exceptionChance: Int) = r.nextInt(exceptionChance) == 0

def handling[Ex <: Throwable, T](exType: Class[Ex])(block: => T): Either[Ex, T] =
  catching(exType).either(block).asInstanceOf[Either[Ex, T]]

def exceptionOrString = if(randomBoolean(4)) throw new RuntimeException("This is a runtime exception") else "Phew! You got a string"

val handleExample: Either[RuntimeException, String] = handling(classOf[RuntimeException])(exceptionOrString)

handleExample match {
  case Left(exception) => println(exception)
  case Right(string) => println(string)
}