So, first of all this is hosted on Google App Engine -- so I don't even see how it could even provide what is claimed. The environment doesn't really support it

So, first of all this is hosted on Google App Engine -- so I don't even see how it could even provide what is claimed. The environment doesn't really support it. If you want asynchronous network programming in Java or Scala, you should be using either Netty or something higher level like Finagle: http://github.com/twitter/finagle http://github.com/twitter/finagle