class FnordMetric::CountMetric < FnordMetric::Metric

private

  def value_at(time_or_range)
  	# FIXME: value_at(my_time) is really slow, because it has to fetch all events that 
  	# happened until that time (and this is not even cached, when time is in the future   	
  	# or just now), so we should redirect the call to something like:
  	# value_at(last_cache_since_my_time) + value_at(last_cache_since_my_time..my_time) 
    events_at(time_or_range).count
  end

end