playframework/playframework — pull request #3336 by NicolaeNMV (2014-08-26 09:10:23+00:00)
Title: Documentation ScalaWebSockets, should create a single Concurrent.broadcast

The example of Concurrent.broadcast is confusing as it will create an instance of broadcast(Enumerator and Concurrent.Channel) for every client and thus the broadcast to one client doesn't make sense.
It's better to create it once so the messages are broadcasted to all clients to show it working.
Here is an example of a confused user http://stackoverflow.com/questions/23966883/cannot-broadcast-to-all-clients-in-play2/23967653#23967653