foo.js.coffee

App.PushClient = Em.Object.extend
  init: ->
    @connection = connectToSocketIOSomehow()
  
  subscribe: (channel, callback) ->
    @connection.subscribe channel, callback

App.register 'pushClient:main', App.PushClient
App.inject 'router', 'pushClient', 'pushClient:main' # inject pushClient into router

# optional
App.inject 'pushClient', 'store', 'store:main' #inject store into pushClient
App.inject 'pushClient', 'router', 'router:main' #incject router into pushClient