naive flushing implemented with a throttler.

common/repeat_timer.go

@@ -0,0 +1,36 @@
+package common
+
+import "time"
+
+/* RepeatTimer */
+type RepeatTimer struct {
+	Ch    chan struct{}
+	quit  chan struct{}
+	dur   time.Duration
+	timer *time.Timer
+}
+
+func NewRepeatTimer(dur time.Duration) *RepeatTimer {
+	var ch = make(chan struct{})
+	var quit = make(chan struct{})
+	var t = &RepeatTimer{Ch: ch, dur: dur, quit: quit}
+	t.timer = time.AfterFunc(dur, t.fireHandler)
+	return t
+}
+
+func (t *RepeatTimer) fireHandler() {
+	select {
+	case t.Ch <- struct{}{}:
+		t.timer.Reset(t.dur)
+	case <-t.quit:
+	}
+}
+
+func (t *RepeatTimer) Reset() {
+	t.timer.Reset(t.dur)
+}
+
+func (t *RepeatTimer) Stop() bool {
+	close(t.quit)
+	return t.timer.Stop()
+}