gistfile1.rb

  # Would be nice to be part of scout internals
  def counter(name, value, options = {})
    current_time = Time.now

    if data = memory(name)
      last_time, last_value = data[:time], data[:value]
      elapsed_seconds       = current_time - last_time

      # We won't log it if the value has wrapped or enough time hasn't
      # elapsed
      if value >= last_value && elapsed_seconds >= 1
        result = value - last_value

        case options[:per]
        when :second, 'second'
          result = result / elapsed_seconds.to_f
        when :minute, 'minute'
          result = result / elapsed_seconds.to_f / 60.0
        end

        result = result.to_i if options[:round]

        report(name => result)
      end
    end

    remember(name => { :time => current_time, :value => value })
  end