50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# 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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"""
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Session Handling for SQLAlchemy backend
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"""
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from glance.common import flags
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FLAGS = flags.FLAGS
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_ENGINE = None
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_MAKER = None
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def get_engine(echo=False):
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global _ENGINE
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if not _ENGINE:
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_ENGINE = create_engine(FLAGS.sql_connection, echo=echo)
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return _ENGINE
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def get_session(autocommit=True, expire_on_commit=False):
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"""Helper method to grab session"""
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global _MAKER
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if not _MAKER:
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engine = get_engine()
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_MAKER = sessionmaker(bind=engine,
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autocommit=autocommit,
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expire_on_commit=expire_on_commit)
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return _MAKER()
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