Convert Ning AsyncHandler to Scala Future with AsyncHttpClient

Java Future to Scala Future in Ning

trait IHttpClient[T] {
  def host: String

  def port: Int

  def get(uri: String): Future[T]
}

trait NingHttpClient extends IHttpClient[Response] {

  val client = new AsyncHttpClient()

  def get(uri: String): Future[Response] = {
    val promise = Promise[Response]()
    client.prepareGet(s"http://$host:$port$uri").execute(new AsyncCompletionHandler[Response] {
      def onCompleted(response: Response) = {
        promise.success(response)
        response
      }
      override def onThrowable(t: Throwable) {
        promise.failure(t)
        super.onThrowable(t)
      }
    })
    promise.future
  }
}