rnotify.rb

require 'RNotify'
notify_status = Notify.init('rstakeout')
raise 'Failed to initialize libnotify' unless notify_status
notification = Notify::Notification.new 'rstakeout', nil, nil, nil

# many times
notification.update "test", "message", nil
notification.timeout = 1
notification.urgency = 0
notification.show

# then
notification.close
Notify.uninit # this outputs the error message