Rooms

Rooms are groups of clients that can be targeted specifically.

Add a client to a room

client.joinRoom("room42");

Remove a client from a room

client.leaveRoom("room42");

Clients automatically leave all rooms on disconnect.

Broadcast to a room

Get the operations for a room then emit:

BroadcastOperations room = server.getRoomOperations("room42");
room.sendEvent("roomEvent", data);

This sends roomEvent only to clients currently in "room42".

Rooms per Namespace

Rooms live within a namespace:

server.getNamespace("/chat")
      .getRoomOperations("room42")
      .sendEvent("msg", msg);

List clients in a room

Collection<SocketIOClient> clientsInRoom =
    server.getRoomOperations("room42").getClients();

This gives you the current snapshot of clients in that room.