def join(self, username):
"""Lets a user join a room on a specific Namespace."""
user = User()
user.request = self.request
user.mdb_collection = self.request.registry.max_store.users
user.fromDatabase(username)
subscribed_conversations = [a['id'] for a in user.talkingIn['items'] if a['objectType'] == 'conversation']
self.socket.rooms = set(subscribed_conversations)
print 'User %s listening to conversations: %s' % (username, ', '.join(subscribed_conversations))
