abd1b652f7
oslo.db first stable release has been cut and we can start using it instead of openstack/common/db/* code which is now marked obsolete. Change-Id: I1ccf896922a5a762d37a1a3b93c56c8b8ae8c085
85 lines
2.3 KiB
Python
85 lines
2.3 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
|
|
import sqlalchemy as sql
|
|
|
|
from neutron.db import model_base
|
|
from neutron.openstack.common import log as logging
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
BASE = model_base.BASEV2
|
|
|
|
_FACADE = None
|
|
|
|
|
|
def _create_facade_lazily():
|
|
global _FACADE
|
|
|
|
if _FACADE is None:
|
|
_FACADE = session.EngineFacade.from_config(cfg.CONF, sqlite_fk=True)
|
|
|
|
return _FACADE
|
|
|
|
|
|
def configure_db():
|
|
"""Configure database.
|
|
|
|
Establish the database, create an engine if needed, and register
|
|
the models.
|
|
"""
|
|
register_models()
|
|
|
|
|
|
def clear_db(base=BASE):
|
|
unregister_models(base)
|
|
|
|
|
|
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)
|
|
|
|
|
|
def register_models(base=BASE):
|
|
"""Register Models and create properties."""
|
|
try:
|
|
facade = _create_facade_lazily()
|
|
engine = facade.get_engine()
|
|
base.metadata.create_all(engine)
|
|
except sql.exc.OperationalError as e:
|
|
LOG.info(_("Database registration exception: %s"), e)
|
|
return False
|
|
return True
|
|
|
|
|
|
def unregister_models(base=BASE):
|
|
"""Unregister Models, useful clearing out data before testing."""
|
|
try:
|
|
facade = _create_facade_lazily()
|
|
engine = facade.get_engine()
|
|
base.metadata.drop_all(engine)
|
|
except Exception:
|
|
LOG.exception(_("Database exception"))
|