Gilles Soulier
52 lines
890 B
Go
52 lines
890 B
Go
package websocket
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import (
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"encoding/json"
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"log"
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"sync"
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"github.com/gorilla/websocket"
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)
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type Hub struct {
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mu sync.RWMutex
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clients map[*websocket.Conn]struct{}
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}
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func NewHub() *Hub {
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return &Hub{clients: make(map[*websocket.Conn]struct{})}
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}
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func (h *Hub) Register(conn *websocket.Conn) {
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h.mu.Lock()
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h.clients[conn] = struct{}{}
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h.mu.Unlock()
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}
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func (h *Hub) Unregister(conn *websocket.Conn) {
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h.mu.Lock()
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delete(h.clients, conn)
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h.mu.Unlock()
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}
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func (h *Hub) Broadcast(msg interface{}) {
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data, err := json.Marshal(msg)
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if err != nil {
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log.Printf("[ws] marshal: %v", err)
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return
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}
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h.mu.RLock()
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defer h.mu.RUnlock()
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for conn := range h.clients {
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if err := conn.WriteMessage(websocket.TextMessage, data); err != nil {
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log.Printf("[ws] write: %v", err)
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}
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}
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}
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func (h *Hub) Count() int {
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h.mu.RLock()
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defer h.mu.RUnlock()
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return len(h.clients)
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}
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