Metric#value_at, Metric#values_in stubs

  var rbuf = new RingBuffer[(Long, Double)](1000)

  var rbuf_seek_pos = 0

  // adds a value to this metric

  // adds a value to the metric's bucket and tries to flush the bucket

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

    bucket.flush_every(key.flush_interval, (

    bucket.sample(value)

  }

  // adds an aggregated value to the in memory ring buffer after it has been

  // flushed from the bucket

  // adds an aggregated value to the in memory ring buffer after it has

  // been flushed from the bucket

  private def flush_bucket(time: Long, value: Double) = {

    if (rbuf.remaining == 0) {

    rbuf_seek_pos += flush_range

  }

  // returns this metrics value at time0 if a value was recorded at that

  // point in time

  def value_at(time0: Long) : Option[Double] = {

    val values = values_in(time0, 0)

    if (values.size > 0)

      Some(values.first._2)

    else

      None

  }

  // returns all aggregated values for this metric in the specified time

  // range. if time1 is 0 then only the first value at time0 is returned

  def values_in(time0: Long, time1: Long) : List[(Long, Double)] = {

    val lst = List[(Long, Double)]()

    // here be dragons

    lst

  }

}