Mercurial > libervia-backend
view sat/tools/async_trigger.py @ 2845:42380a4f6433
quick frontend (app): new synchronisation mechanism:
on some frontend (notably on mobiles) frontend can be paused and lose synchronisation with backend, this can also happen if backend restart a connexion without resuming using stream management. To manage that, QuickApp now has a sync attribute which is True when the backend is in sync with frontend.
When synchronisation has been lost and is possible again, all widget will have their "resync" method called, which can be used to do necessary calls to update the status.
It's the responsability of each widget to then reset the "sync" attribute, once everything has been resynchronised.
author | Goffi <goffi@goffi.org> |
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date | Sat, 09 Mar 2019 16:33:31 +0100 |
parents | 003b8b4b56a7 |
children | ab2696e34d29 |
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#!/usr/bin/env python2 # -*- coding: utf-8 -*- # SAT: a jabber client # Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. """Misc usefull classes""" from sat.tools import trigger as sync_trigger from twisted.internet import defer class TriggerManager(sync_trigger.TriggerManager): """This is a TriggerManager with an new asyncPoint method""" @defer.inlineCallbacks def asyncPoint(self, point_name, *args, **kwargs): """This put a trigger point with potentially async Deferred All the triggers for that point will be run @param point_name: name of the trigger point @param *args: args to transmit to trigger @param *kwargs: kwargs to transmit to trigger if "triggers_no_cancel" is present, it will be popped out when set to True, this argument don't let triggers stop the workflow @return D(bool): True if the action must be continued, False else """ if point_name not in self.__triggers: defer.returnValue(True) can_cancel = not kwargs.pop('triggers_no_cancel', False) for priority, trigger in self.__triggers[point_name]: try: cont = yield trigger(*args, **kwargs) if can_cancel and not cont: defer.returnValue(False) except sync_trigger.SkipOtherTriggers: break defer.returnValue(True)