cleaning up

  var rbuf_seek_pos = 0

  // adds a value to this metric

  def sample(value: Double) = {

    this.synchronized {

  def sample(value: Double) = this.synchronized {

    bucket.flush_every(key.flush_interval, (

      (time, value) => flush_bucket(time, value) ))

    }

    bucket.sample(value)

  }