Yeah, the whole backend is powered by message_bus. The android/ios client long-polls. Not sure if this is the best use of message_bus, but It works w/o the added complexity of web sockets. The major win is that it fits in our existing rails stack. The only disadvantage i’ve come across so far is that I can’t find an elegant way to support the typing indicator.
http://www.eggie5.com/58-real-time-messenging-w-ruby-ios-android