Hexagonal Ruby controllers

hexagonal_controller.rb

class Result
  def success(&blk)
    @success = blk
  end

  def succeeded
    @success.call
  end

  def failure(&blk)
    @failure = blk
  end

  def failed
    @failure.call
  end
end

class CreateCommand
  def apply
    result = Result.new
    yield result
    if rand(2) == 0
      result.succeeded
    else
      result.failed
    end
  end
end

class Controller
  def create
    CreateCommand.new.apply do |on|
      on.success do
        puts "Success"
      end
      on.failure do
        puts "Fail"
      end
    end
  end
end

Controller.new.create