hooks/__init__.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 29 Sep 2011 14:05:42 +0200
branchstable
changeset 7887 42a0b7398d31
parent 7708 45be3a9debe6
child 7995 9a9f35ef418c
permissions -rw-r--r--
[repository] when deleting relations of a deleted external entity, we should skip non-crossable relation (closes #1973680) elses this may lead to things as described in the ticket...
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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""core hooks registering some maintainance tasks as server startup time"""
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__docformat__ = "restructuredtext en"
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from datetime import timedelta, datetime
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from cubicweb.server import hook
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class ServerStartupHook(hook.Hook):
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    """task to cleanup expirated auth cookie entities"""
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    __regid__ = 'cw.start-looping-tasks'
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    events = ('server_startup',)
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    def __call__(self):
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        # XXX use named args and inner functions to avoid referencing globals
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        # which may cause reloading pb
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        lifetime = timedelta(days=self.repo.config['keep-transaction-lifetime'])
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        def cleanup_old_transactions(repo=self.repo, lifetime=lifetime):
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            mindate = datetime.now() - lifetime
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            session = repo.internal_session()
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            try:
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                session.system_sql(
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                    'DELETE FROM transactions WHERE tx_time < %(time)s',
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                    {'time': mindate})
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                # cleanup deleted entities
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                session.system_sql(
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                    'DELETE FROM deleted_entities WHERE dtime < %(time)s',
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                    {'time': mindate})
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                session.commit()
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            finally:
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                session.close()
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        if self.repo.config['undo-support']:
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            self.repo.looping_task(60*60*24, cleanup_old_transactions,
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                                   self.repo)
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        def update_feeds(repo):
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            # don't iter on repo.sources which doesn't include copy based
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            # sources (the one we're looking for)
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            for source in repo.sources_by_eid.itervalues():
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                if (not source.copy_based_source
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                    or not repo.config.source_enabled(source)
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                    or not source.config['synchronize']):
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                    continue
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                session = repo.internal_session(safe=True)
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                try:
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                    stats = source.pull_data(session)
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                    if stats.get('created'):
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                        source.info('added %s entities', len(stats['created']))
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                    if stats.get('updated'):
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                        source.info('updated %s entities', len(stats['updated']))
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                except Exception, exc:
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                    session.exception('while trying to update feed %s', source)
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                finally:
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                    session.close()
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        self.repo.looping_task(60, update_feeds, self.repo)