[optimization] improve massive write performance by optimizing hooks selection
profiling on some massive deletion showed up that 2/3 of the time was spent
in hooks selection. Those changes make it much more acceptable (through
selection is still not negligeable):
* use one registry for each event, so we've much less hooks to check
when emiting an event as well as no more need for the match_event
selector. This required ability to put one appobject
into several registries, using a __registries__ class attribute.
* check for deprecated .enabled at registry initialization time instead
of at selection time
A very simple HooksManager class has been reintroduce to choose the
right registry on call_hooks.
Those optimisations leads to a ~x3 factor of time necessary to delete
16000 entities.
"""core hooks
:organization: Logilab
:copyright: 2009-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
from datetime import timedelta, datetime
from cubicweb.server import hook
class ServerStartupHook(hook.Hook):
"""task to cleanup expirated auth cookie entities"""
__regid__ = 'cw_cleanup_transactions'
events = ('server_startup',)
def __call__(self):
# XXX use named args and inner functions to avoid referencing globals
# which may cause reloading pb
lifetime = timedelta(days=self.repo.config['keep-transaction-lifetime'])
def cleanup_old_transactions(repo=self.repo, lifetime=lifetime):
mindate = datetime.now() - lifetime
session = repo.internal_session()
try:
session.system_sql(
'DELETE FROM transaction WHERE tx_time < %(time)s',
{'time': mindate})
# cleanup deleted entities
session.system_sql(
'DELETE FROM deleted_entities WHERE dtime < %(time)s',
{'time': mindate})
session.commit()
finally:
session.close()
self.repo.looping_task(60*60*24, cleanup_old_transactions, self.repo)