SIP-14 Futures and Promises
http://docs.scala-lang.org/sips/completed/futures-promises.html
http://en.wikipedia.org/wiki/Futures_and_promises
http://akka.io/
Scala并发编程,布布扣,bubuko.com
Scala并发编程
原文：http://my.oschina.net/scipio/blog/300979
