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cinder/db/base.py

 

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# vim: tabstop=4 shiftwidth=4 softtabstop=4

 

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# Copyright 2010 United States Government as represented by the

 

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# Administrator of the National Aeronautics and Space Administration.

 

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# All Rights Reserved.

 

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#

 

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#    Licensed under the Apache License, Version 2.0 (the "License"); you may

 

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#    not use this file except in compliance with the License. You may obtain

 

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#    a copy of the License at

 

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#

 

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#         http://www.apache.org/licenses/LICENSE-2.0

 

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#

 

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#    Unless required by applicable law or agreed to in writing, software

 

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#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

 

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#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

 

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#    License for the specific language governing permissions and limitations

 

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#    under the License.

 

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"""Base class for classes that need modular database access."""

 

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from cinder import flags

 

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from cinder.openstack.common import cfg

 

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from cinder.openstack.common import importutils

 

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db_driver_opt = cfg.StrOpt('db_driver',

 

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                           default='cinder.db',

 

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                           help='driver to use for database access')

 

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FLAGS = flags.FLAGS

 

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FLAGS.register_opt(db_driver_opt)

 

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class Base(object):

 

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    """DB driver is injected in the init method."""

 

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    def __init__(self, db_driver=None):

 

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        if not db_driver:

 

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            db_driver = FLAGS.db_driver

 

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        self.db = importutils.import_module(db_driver)  # pylint: disable=C0103

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