Commit fc75e77a authored by Laurent Peuch's avatar Laurent Peuch
Browse files

[debug] add a new channel events mechanism for debugging

parent 22ece66dcd47
# copyright 2019 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
from logging import getLogger
logger = getLogger('cubicweb')
SUBSCRIBERS = {
"rql": [],
}
def subscribe_to_debug_channel(channel, subscriber):
if channel not in SUBSCRIBERS.keys():
raise Exception("debug channel '%s' doesn't exist" % channel)
SUBSCRIBERS[channel].append(subscriber)
def unsubscribe_to_debug_channel(channel, subscriber):
if channel not in SUBSCRIBERS.keys():
raise Exception("debug channel '%s' doesn't exist" % channel)
if subscriber not in SUBSCRIBERS[channel]:
raise Exception("subscriber '%s' is not in debug channel '%s'" % (subscriber, channel))
SUBSCRIBERS[channel].remove(subscriber)
def emit_to_debug_channel(channel, message):
if channel not in SUBSCRIBERS.keys():
raise Exception("debug channel '%s' doesn't exist" % channel)
for subscriber in SUBSCRIBERS[channel]:
try:
subscriber(message)
except Exception:
logger.error("Failed to send debug message '%s' to subscriber '%s'", message, subscriber, exc_info=True)
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