def add_event_handler(self, action):
        """Add a event handler into actions list

        :param action: event handler to add
        :type action: alignak.eventhandler.EventHandler
        :return: None
        """
        if action.uuid in self.actions:
            logger.info("Already existing event handler: %s", action)
            return

        self.actions[action.uuid] = action
        self.nb_event_handlers += 1
Add a event handler into actions list

        :param action: event handler to add
        :type action: alignak.eventhandler.EventHandler
        :return: None