Mercurial > libervia-backend
view sat_frontends/tools/host_listener.py @ 2787:298408833ec2
memory (sqlite): optimizations
indexes were missing on foreign keys for "message", "subject" and "thread" tables, seriously impacting performances.
In addition to those indexes, two indexes have been added to speed ordering by timestamp on "history", and one on "files" table.
history.rowid is not used anymore as there is an index on (profile_id, received_timestamp) which will speed up the query.
Primary keys order has been changed to use automatic index in most common cases (filtering by profile_id then namespace).
author | Goffi <goffi@goffi.org> |
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date | Sat, 19 Jan 2019 22:49:32 +0100 |
parents | 003b8b4b56a7 |
children | 9d0df638c8b4 |
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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/>. """This module is only used launch callbacks when host is ready, used for early initialisation stuffs""" listeners = [] def addListener(cb): """Add a listener which will be called when host is ready @param cb: callback which will be called when host is ready with host as only argument """ listeners.append(cb) def callListeners(host): """Must be called by frontend when host is ready. The call will launch all the callbacks, then remove the listeners list. @param host(QuickApp): the instancied QuickApp subclass """ global listeners while True: try: cb = listeners.pop(0) cb(host) except IndexError: break del listeners