Paging responses - avoid while loop, use Stream takeWhile. Somewhat ugly, but works.

PagingTakeWhile.scala

val responses = MutableList[Response]()

Stream.from(0, PAGE_SIZE).takeWhile { case offset =>

  request.setOffset(offset)
  val response = Await.result(client.execute(request))

  response.getResponseCode match {
    case ResponseCode.OK => responses += (response); true
    case ResponseCode.END => false
    case _ => false // or throw exception
  }

}.foreach { case exec => () } // not lazy

responses.reduce { ... }