66 lines
2.0 KiB
Python
66 lines
2.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2012 NTT DOCOMO, INC.
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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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"""Session Handling for SQLAlchemy backend."""
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from oslo.config import cfg
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from ironic.openstack.common.db.sqlalchemy import session as nova_session
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from nova import paths
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opts = [
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cfg.StrOpt('sql_connection',
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default=('sqlite:///' +
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paths.state_path_def('baremetal_$sqlite_db')),
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help='The SQLAlchemy connection string used to connect to the '
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'bare-metal database'),
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]
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baremetal_group = cfg.OptGroup(name='baremetal',
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title='Baremetal Options')
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CONF = cfg.CONF
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CONF.register_group(baremetal_group)
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CONF.register_opts(opts, baremetal_group)
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CONF.import_opt('sqlite_db', 'ironic.openstack.common.db.sqlalchemy.session')
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_ENGINE = None
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_MAKER = None
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def get_session(autocommit=True, expire_on_commit=False):
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"""Return a SQLAlchemy session."""
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global _MAKER
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if _MAKER is None:
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engine = get_engine()
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_MAKER = nova_session.get_maker(engine, autocommit, expire_on_commit)
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session = _MAKER()
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return session
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def get_engine():
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"""Return a SQLAlchemy engine."""
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global _ENGINE
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if _ENGINE is None:
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_ENGINE = nova_session.create_engine(CONF.baremetal.sql_connection)
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return _ENGINE
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