hooks/__init__.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 07 Apr 2010 14:42:44 +0200
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child 5421 8167de96c523
permissions -rw-r--r--
[querier] don't need a Cache instance for rql cacke key cache
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"""core hooks
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:organization: Logilab
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:copyright: 2009-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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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_cleanup_transactions'
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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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        self.repo.looping_task(60*60*24, cleanup_old_transactions, self.repo)