text: # -*- encoding: utf-8 -*-
  #
  # Copyright © 2013 eNovance <licensing@enovance.com>
  #
  # Author: Julien Danjou <julien@danjou.info>
  #
  # Licensed under the Apache License, Version 2.0 (the "License"); you may
  # not use this file except in compliance with the License. You may obtain
  # a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  # License for the specific language governing permissions and limitations
  # under the License.
  
  import abc
  import six
  
  
  @six.add_metaclass(abc.ABCMeta)
  class AlarmNotifier(object):
      """Base class for alarm notifier plugins."""
  
      @abc.abstractmethod
      def notify(self, action, alarm_id, previous, current, reason):
          """Notify that an alarm has been triggered.
  
          :param action: The action that is being attended, as a parsed URL.
          :param alarm_id: The triggered alarm.
          :param previous: The previous state of the alarm.
          :param current: The current state of the alarm.
          :param reason: The reason the alarm changed its state.
          """
  