require 'rubyonacid/factory' module RubyOnAcid #Increments from the minimum value, stopping at the maximum, or decrements from the maximum value, stopping at the minimum. class IncrementFactory < Factory #The amount to increment counters by. attr_accessor :interval def interval=(value) @interval = value @start_value = (@interval < 0.0 ? 1.0 : 0.0) @counters.each_key{|k| @counters[k] = @start_value} end #Takes a hash with all keys supported by Factory, plus these keys and defaults: # :interval => 0.001 def initialize(options = {}) super @start_value = 0.0 @counters = {} @interval = options[:interval] || 0.001 end #Increment counter for given key and return it. Constrain between 0 and 1. def get_unit(key) @counters[key] ||= @start_value @counters[key] += @interval @counters[key] = 1.0 if @counters[key] > 1.0 @counters[key] = 0.0 if @counters[key] < 0.0 @counters[key] end end end