some progress but still doesn't work

session/events.go

@@ -39,21 +39,29 @@ func (e Event) Label() string {
 type EventPool struct {
 	sync.Mutex
 
-	NewEvents chan Event
 	debug     bool
 	silent    bool
 	events    []Event
+	listeners []chan Event
 }
 
 func NewEventPool(debug bool, silent bool) *EventPool {
 	return &EventPool{
-		NewEvents: make(chan Event, 0xff),
 		debug:     debug,
 		silent:    silent,
 		events:    make([]Event, 0),
+		listeners: make([]chan Event, 0),
 	}
 }
 
+func (p *EventPool) Listen() <-chan Event {
+	p.Lock()
+	defer p.Unlock()
+	l := make(chan Event)
+	p.listeners = append(p.listeners, l)
+	return l
+}
+
 func (p *EventPool) SetSilent(s bool) {
 	p.Lock()
 	defer p.Unlock()
@@ -71,7 +79,11 @@ func (p *EventPool) Add(tag string, data interface{}) {
 	defer p.Unlock()
 	e := NewEvent(tag, data)
 	p.events = append([]Event{e}, p.events...)
-	p.NewEvents <- e
+
+	// broadcast the event to every listener
+	for _, l := range p.listeners {
+		l <- e
+	}
 }
 
 func (p *EventPool) Log(level int, format string, args ...interface{}) {