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#!/usr/bin/env python
# Copyright 2005 Canonical Ltd. All rights reserved.
# This script updates the cached stats in the system
import _pythonpath
import sys
from optparse import OptionParser
from zope.component import getUtility
from canonical.lp import initZopeless
from canonical.launchpad.interfaces import IBugTaskSet
from canonical.launchpad.scripts import (
execute_zcml_for_scripts, logger_options, logger)
from canonical.launchpad.scripts.lockfile import LockFile
from canonical.config import config
_default_lock_file = '/var/lock/launchpad-targetnamecacheupdater.lock'
def update_bugtask_targetname_caches():
"""Update the targetnamecache for all IBugTasks.
This ensures that the cache values are up-to-date even after, for example,
an IDistribution being renamed.
"""
ztm = initZopeless(dbuser=config.targetnamecacheupdater.dbuser,
implicitBegin=False)
bugtaskset = getUtility(IBugTaskSet)
ztm.begin()
bugtask_ids = [bugtask.id for bugtask in bugtaskset]
ztm.commit()
for bugtask_id in bugtask_ids:
ztm.begin()
bugtask = bugtaskset.get(bugtask_id)
bugtask.updateTargetNameCache()
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, 'update-bugtask-targetnamecaches')
log.info("Updating targetname cache of bugtasks.")
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_bugtask_targetname_caches()
finally:
lockfile.release()
log.info("Finished updating targetname cache of bugtasks.")
sys.exit(0)
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