PayRoll application, embedded in Rails, borrowing from Use Case Driven Architecture and DCI

gistfile1.rb

class PayDayService
  def initialize(employees, date)
    @employees, @date = employees, date
  end

  def execute
    @employees.each do |e|
      if e.pay_date?(@date)
        pc = PayCheck.new(e.calculate_pay(@date))
        e.send_pay(pc)
      end
    end
  end
end