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#!/usr/bin/env python
# Copyright 2005 Canonical Ltd. All rights reserved.
import _pythonpath
import sys
from optparse import OptionParser
from zope.component import getUtility
from canonical.config import config
from canonical.lp import initZopeless
from canonical.launchpad.scripts import (
execute_zcml_for_scripts, logger_options, logger
)
from canonical.launchpad.scripts.lockfile import LockFile
from canonical.launchpad.interfaces import IPersonSet
_default_lock_file = '/var/lock/launchpad-karma-update.lock'
def update_karma_cache():
"""Update the KarmaCache table for all valid Launchpad users.
For each Launchpad user with a preferred email address, calculate his
karmavalue for each category of actions we have and update his entry in
the KarmaCache table. If a user doesn't have an entry for that category in
KarmaCache a new one will be created.
"""
ztm = initZopeless(dbuser=config.karmacacheupdater.dbuser,
implicitBegin=False)
personset = getUtility(IPersonSet)
ztm.begin()
person_ids = [p.id for p in personset.getAllValidPersons()]
ztm.commit()
for person_id in person_ids:
ztm.begin()
person = personset.get(person_id)
person.updateKarmaCache()
ztm.commit()
if __name__ == '__main__':
parser = OptionParser()
logger_options(parser)
(options, arguments) = parser.parse_args()
if arguments:
parser.error("Unhandled arguments %s" % repr(arguments))
execute_zcml_for_scripts()
log = logger(options, 'karmacache')
log.info("Updating the karma cache of Launchpad users.")
lockfile = LockFile(_default_lock_file, logger=log)
try:
lockfile.acquire()
except OSError:
log.info("lockfile %s already exists, exiting", _default_lock_file)
sys.exit(1)
try:
update_karma_cache()
finally:
lockfile.release()
log.info("Finished updating the karma cache of Launchpad users.")
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