Scala Future example

gistfile1.txt

Yep Futures/Promises are monads, in scala you'll often see code like:

val foo = for {
    someResult <- doSomethingAsync(someArgument);
    someOtherResult <- doAnotherThingAsync(someResult);
    finalResult <- yetAnotherAsyncThing(someOtherResult);
} yield (finalResult)

foo.recover {
  case SomeException e => "Something Went Wrong!"
}

Which is syntax sugar for:

val foo = doSomethingAsync.flatMap {
    someResult => doSomeOtherThingAsync(someResult).flatMap {
        someOtherResult => yetAnotherAsyncThing(someOtherResult)
    }
}

foo.recover {
    case SomeException e => "Something Went Wrong!"
}