You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: log_device.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/lib/logger
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require_relative 'period'

class Logger
  # Device used for logging messages.
  class LogDevice
    include Period

    attr_reader :dev
    attr_reader 
    
    def initialize(log = nil, shift_age: nil, shift_size: nil, shift_period_suffix: nil, binmode: false)
      @dev = @filename = @shift_age = @shift_size = @shift_period_suffix = nil
      @binmode = binmode
      mon_initialize
      set_dev(log)
      if @filename
        @shift_age = shift_age || 7
        @shift_size = shift_size || 1048576
        @shift_period_suffix = shift_period_suffix || '%Y%m%d'

        unless @shift_age.is_a?(Integer)
          base_time = @dev.respond_to?(:stat) ? @dev.stat.mtime : Time.now
          @next_rotate_time = next_rotate_time(base_time, @shift_age)
        end