func consume(queue *lang.Queue) {
	e := ewma.NewMovingAverage()
	for {
		old_len := queue.Len()
		time.Sleep(1000 * time.Millisecond)
		new_len := queue.Len()
		msg_cnt := float64(new_len - old_len)
		e.Add(msg_cnt)
		str := fmt.Sprintf("Msg cnt: %v | Msg send: %v | ewma: %v", new_len, msg_cnt, e.Value())
		fmt.Println(str)
	}
}
func handle(conn net.Conn, queue *lang.Queue) {
	fmt.Println("Connection: %s -> %s\n", conn.RemoteAddr(), conn.LocalAddr())
	defer func() {
		fmt.Println("Closing connection: %s\n", conn.RemoteAddr())
		conn.Close()
	}()

	scanner := bufio.NewScanner(conn)
	for scanner.Scan() {
		if m := strings.Split(scanner.Text(), " "); len(m) > 2 {
			ts, _ := strconv.ParseInt(m[2], 10, 0)
			val, _ := strconv.Atoi(m[1])
			m := &Metric{m[0], val, int(ts)}
			//fmt.Println("Metric ", ts, m)
			queue.Push(m)
		}
	}

	if err := scanner.Err(); err != nil {
		// handling error
	}
}