[server/session] Roll back in connection exit
This was changed in commit 8b35a898b334 "[server] remove cnxset
tracking, it is now unneeded".
When exiting a CubicWeb Connection, the database connection is put back
into the common pool. At that point anything done during the lifetime
of the CubicWeb Connection needs to be committed or rolled back.
Do a proper rollback to finish the transaction, as was happening before
the above-mentionned commit.
This showed up on testing with postgresql, when a DB schema modification
was blocked by an old connection that was still "in transaction".
# copyright 2014 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/>.
"""looping task for dumping instance's stats in a file
"""
__docformat__ = "restructuredtext en"
from datetime import datetime
import json
from cubicweb.server import hook
class LogStatsStartHook(hook.Hook):
"""register task to regularly dump instance's stats in a file
data are stored as one json entry per row
"""
__regid__ = 'cubicweb.hook.logstats.start'
events = ('server_startup',)
def __call__(self):
interval = self.repo.config.get('logstat-interval', 0)
if interval <= 0:
return
def dump_stats(repo):
statsfile = repo.config.get('logstat-file')
with repo.internal_cnx() as cnx:
stats = cnx.call_service('repo_stats')
gcstats = cnx.call_service('repo_gc_stats', nmax=5)
allstats = {'resources': stats,
'memory': gcstats,
'timestamp': datetime.utcnow().isoformat(),
}
try:
with open(statsfile, 'ab') as ofile:
json.dump(allstats, ofile)
ofile.write('\n')
except IOError:
repo.warning('Cannot open stats file for writing: %s', statsfile)
self.repo.looping_task(interval, dump_stats, self.repo)