dgruntz/scala-async

scala-async

scala-async is an attempt to implement something akin to C#'s async based on scala's delimited continuations and akka's Futures.

Example

/** Painless asynchronous programming with Swing. */
object ReadmeExample extends SimpleSwingApplication {
  
  val dlButton = new Button("Download")
  val charCount = new TextField { text = "0"; columns = 5 }
  
  def top = new MainFrame {
    title = "Scala-Async Test"
    contents = new FlowPanel(dlButton, new Label("# Chars"), charCount)
  }

  listenTo(dlButton)
  reactions += {
    case ButtonClicked(`dlButton`) => 
      charCount.text = ""
      async {
        // No blocking is involved here!
        val akka = await { downloadAsync("http://www.akka.io/") }
        val scala = await { downloadAsync("http://www.scala-lang.org/") }
        // Access swing components directly
        charCount.text = (akka.length + scala.length).toString
      }
  }
  
  /** Downloads the content of the given url asynchronously. */
  def downloadAsync(url: String): Future[String] = { ... }
  
  ...
}

Check the full ReadmeExample.scala