Class implements 'time to live' functionality

time_to_live.rb

require 'singleton'
require 'active_support'

class TimeToLive
  include Singleton

  attr_reader :start_time

  def initialize
    @live = true
    @start_time = Time.now
  end

  def time_to_die?
    if expired? && alive?
      @live = false
      raise StandardError.new('Time to die')
    end
  end

  private

  def alive?
    @live
  end

  def expired?
    (@start_time + expiration_value) < Time.now
  end

  def expiration_value
    2.minutes
  end
end

For fun ^_^