TwiiterScalaFutureOps.scala

object TwiiterScalaFutureOps {

  import TwitterScalaFutureConverters._
  implicit class ScalaToTwitterFuture[T](f: Future[T]) {
    def toTwitterFuture: twitter.Future[T] = scalaToTwitterFuture(f)
  }

  implicit class TwitterToScalaFuture[T](f: twitter.Future[T]) {
    def toScalaFuture: Future[T] = twitterToScalaFuture(f)
  }
}

TwitterScalaFutureConverters.scala

object TwitterScalaFutureConverters {
  implicit def scalaToTwitterTry[T](t: Try[T]): twitter.Try[T] = t match {
    case Success(r)  => twitter.Return(r)
    case Failure(ex) => twitter.Throw(ex)
  }

  implicit def twitterToScalaTry[T](t: twitter.Try[T]): Try[T] = t match {
    case twitter.Return(r) => Success(r)
    case twitter.Throw(ex) => Failure(ex)
  }

  implicit def scalaToTwitterFuture[T](f: Future[T])(implicit ec: ExecutionContext): twitter.Future[T] = {
    val promise = twitter.Promise[T]()
    f.onComplete(promise update _)
    promise
  }

  implicit def twitterToScalaFuture[T](f: twitter.Future[T]): Future[T] = {
    val promise = Promise[T]()
    f.respond(promise complete _)
    promise.future
  }
}