2bfe3a9482
Move from oslo-incubator db module to oslo.db Change-Id: I01e04387ee400be92345a12de4f0f83a99980842
52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
# Copyright (c) 2014 Mirantis, Inc.
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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 management functions."""
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import threading
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from oslo.db import options
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from oslo.db.sqlalchemy import session as db_session
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from murano.common import config
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from murano.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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CONF = config.CONF
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options.set_defaults(CONF)
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_FACADE = None
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_LOCK = threading.Lock()
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def _create_facade_lazily():
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global _LOCK, _FACADE
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if _FACADE is None:
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with _LOCK:
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if _FACADE is None:
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_FACADE = db_session.EngineFacade.from_config(CONF,
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sqlite_fk=True)
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return _FACADE
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def get_engine():
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facade = _create_facade_lazily()
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return facade.get_engine()
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def get_session(**kwargs):
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facade = _create_facade_lazily()
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return facade.get_session(**kwargs)
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