/usr/share/pyshared/nova/db/base.py is in python-nova 2012.1-0ubuntu2.
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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Base class for classes that need modular database access."""
from nova import utils
from nova import flags
from nova.openstack.common import cfg
db_driver_opt = cfg.StrOpt('db_driver',
default='nova.db',
help='driver to use for database access')
FLAGS = flags.FLAGS
FLAGS.register_opt(db_driver_opt)
class Base(object):
"""DB driver is injected in the init method."""
def __init__(self, db_driver=None):
if not db_driver:
db_driver = FLAGS.db_driver
self.db = utils.import_object(db_driver) # pylint: disable=C0103
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