github.com/sauerbraten/pubsub (go): Package pubsub implements a topic-based publish-subscribe system using channels.  Subscribers receive updates on channels provided to them when they subscribe to a topic. Topics are automatically created when you subscribe to them and they do not exist yet. In that case, a Publisher type is returned as well, providing methods to publish updates on the new topic. Topics are removed when a subscriber unsubscribes from it and there are no other subscribers left. Publishers include a stop channel from which reading only succeeds after the topic was removed.
Keywords: channels|go|message-bus|publish-subscribe|pubsub