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// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
// hub maintains the set of active clients and broadcasts messages to the
// clients.
type Hub struct {
// Registered clients.
clients map[*Client]bool
// Inbound messages from the clients.
broadcast chan []byte
// Register requests from the clients.
register chan *Client
// Unregister requests from clients.
unregister chan *Client
}
func newHub() *Hub {
return &Hub{
broadcast: make(chan []byte),
register: make(chan *Client),
unregister: make(chan *Client),
clients: make(map[*Client]bool),
}
}
func (h *Hub) run() {
for {
select {
case client := <-h.register:
h.clients[client] = true
case client := <-h.unregister:
if _, ok := h.clients[client]; ok {
delete(h.clients, client)
close(client.send)
}
case message := <-h.broadcast:
for client := range h.clients {
select {
case client.send <- message:
default:
close(client.send)
delete(h.clients, client)
}
}
}
}
}
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