Q: how to implement Socket.io on Tomcat 7 We have existing applications which are hosted on tomcat 6 and we are moving to tomcat 7 which  provides websockets support. 
I wanted to try socket.io in our application, for some of the features based on websockets, since it has very good cross browser support.
I couldn't find any resources online for this combination, socket.io + tomcat,though there are  quite a few for (Socket.io + jetty).
Has anyone tried it?

A: Though I haven't used, I recommend the Atmosphere project to develop socket.io application on the JVM. Their support is built on top of Atmosphere API which is powered by Servlet 3 spec and all most server-specific features. That means, you don't need to stick Tomcat 7 to use socketio on the JVM.
http://jfarcand.wordpress.com/2012/06/04/writing-socket-io-application-that-runs-on-the-jvm/
