Create a new hub. Hub is a dict containing the following public
information:
- Hub.name
- The name of the hub (the Name argument)
- queues.event
- Message queue to which the hub
thread(s) can listen.
After creating a hub, the application normally creates a thread
that listens to Hub.queues.event and exposes some mechanisms to
establish websockets and add them to the hub using hub_add/3.
- See also
- - http_upgrade_to_websocket/3 establishes a websocket from
the SWI-Prolog webserver.