SWI-Prolog -- hub_broadcast/2

Documentation
- Reference manual
- Packages
  - SWI-Prolog HTTP support
    - library(http/hub): Manage a hub for websockets

Availability::- use_module(library(http/hub)).

[det]hub_broadcast(+Hub, +Message)

[det]hub_broadcast(+Hub, +Message, :Condition)

Send Message to all websockets associated with Hub for which call(Condition, Id) succeeds. Note that this process is asynchronous: this predicate returns immediately after putting all requests in a broadcast queue. If a message cannot be delivered due to a network error, the hub is informed through io_error/3.