I think it is supposed to be for Java app engine side not JavaScript client
Quote of doc part In order to initiate the process of creating a channel, JavaScript client pages call the ChannelServiceFactory.getChannelService() method and get a ChannelService() object. Then they use the object's createChannel() method and get a token that the client page can use to connect to the channel. When calling createChannel(), they send a Client ID that uniquely identifies the client to the server. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
