Well, if you're talking about alternatives that do asynchronism, Comet and Web Sockets well, the most convenient framework I ever used is Play 2.1 The framewor

Well, if you're talking about alternatives that do asynchronism, Comet and Web Sockets well, the most convenient framework I ever used is Play 2.1 The framework is said to be reactive, meaning that you can build components that react to events asynchronously. The architecture is completely awesome, as Akka actors are baked in and the protocols are modelled with Futures and Iteratees, an FP concept for sane I/O. Things like serving unending streams of data and responding to client events using async I/O are in the very foundations of the framework, instead of being taked on later. People using Node.js or Tornado or whatever, don't know what they are missing. See their docs on the subject: - for Scala: http://www.playframework.com/documentation/2.1.1/ScalaAsync http://www.playframework.com/documentation/2.1.1/ScalaAsync - for Java: http://www.playframework.com/documentation/2.1.1/JavaAsync http://www.playframework.com/documentation/2.1.1/JavaAsync