# File lib_core/rucy/server.rb, line 212
    def close_server
      if (@server) then
        family, port, host, ip = @server.addr
        @logger.notice("close server: #{family}:#{host}[#{ip}]:#{port}")
        @server.close
      end
      stop_messengers(@messengers, @socket_queue, @messenger_thgrp, @restart_signal)
      close_document
      call_hook('close', @close_hook)

      nil
    end