Broadcasting

Broadcasting means sending an event to multiple/all clients at once.

Broadcast to all connected clients

server.getBroadcastOperations()
      .sendEvent("news", "Hello everyone!");

This sends the "news" event to all active clients.

Broadcasting within a namespace

If you’re using namespaces (custom logical channel), get the namespace first:

server.getNamespace("/chat")
      .getBroadcastOperations()
      .sendEvent("globalMessage", payload);

Namespaces partition clients; clients must connect to that namespace to receive those events.