44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
# Copyright 2011 VMware, Inc.
|
|
# 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.
|
|
|
|
from oslo_config import cfg
|
|
from oslo_db.sqlalchemy import session
|
|
|
|
_FACADE = None
|
|
|
|
MAX_RETRIES = 10
|
|
|
|
|
|
def _create_facade_lazily():
|
|
global _FACADE
|
|
|
|
if _FACADE is None:
|
|
_FACADE = session.EngineFacade.from_config(cfg.CONF, sqlite_fk=True)
|
|
|
|
return _FACADE
|
|
|
|
|
|
def get_engine():
|
|
"""Helper method to grab engine."""
|
|
facade = _create_facade_lazily()
|
|
return facade.get_engine()
|
|
|
|
|
|
def get_session(autocommit=True, expire_on_commit=False):
|
|
"""Helper method to grab session."""
|
|
facade = _create_facade_lazily()
|
|
return facade.get_session(autocommit=autocommit,
|
|
expire_on_commit=expire_on_commit)
|