view sat_frontends/bridge/bridge_frontend.py @ 2716:06160b529da6

core (memory/sqlite): changed history constraint /!\ Database schema change /!\ History was using a unique constraint on `profile_id, timestamp, source, dest, source_res, dest_res`, which can cause trouble because several messages send quickly by the same person can have a common timestamp (specially with delayed messages where precision is second), resulting in message loss. The new constraint use `profile_id, stanza_id, source, dest` where `stanza_id` is XEP-0359 stanza_id, so it's unique by definition, and no message should be lost anymore. Because sqlite doesn't support altering table with a constraint change, we have to create new tables and copy old data to new one, which can be pretty long. Sqlite update mechanism with "specifics" has been fixed when several updates are applied (e.g. moving from v5 to v7) and a specific is in the workflow.
author Goffi <goffi@goffi.org>
date Sun, 09 Dec 2018 14:07:26 +0100
parents 56f94936df1e
children 378188abe941
line wrap: on
line source

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT communication bridge
# Copyright (C) 2009-2018 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/>.


class BridgeException(Exception):
    """An exception which has been raised from the backend and arrived to the frontend."""

    def __init__(self, name, message="", condition=""):
        """

        @param name (str): full exception class name (with module)
        @param message (str): error message
        @param condition (str) : error condition
        """
        Exception.__init__(self)
        self.fullname = unicode(name)
        self.message = unicode(message)
        self.condition = unicode(condition) if condition else ""
        self.module, dummy, self.classname = unicode(self.fullname).rpartition(".")

    def __str__(self):
        message = (": %s" % self.message) if self.message else ""
        return self.classname + message

    def __eq__(self, other):
        return self.classname == other