APN::Connection.open_for_delivery do |conn, sock|
  loop do
    notifications = APN::Notification.all(:conditions => {:sent_at => nil})
    unless notifications.nil? || notifications.empty?
      notifications.each do |noty|
        conn.write(noty.message_for_sending)
        noty.sent_at = Time.now
        noty.save
      end
    end
  end
end