41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
# -*- encoding: utf-8 -*-
|
|
#
|
|
# Copyright 2013 Hewlett-Packard Development Company, L.P.
|
|
#
|
|
# 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.
|
|
"""
|
|
Base classes for storage engines
|
|
"""
|
|
|
|
import abc
|
|
|
|
from tuskar.openstack.common.db import api as db_api
|
|
|
|
_BACKEND_MAPPING = {'sqlalchemy': 'tuskar.db.sqlalchemy.api'}
|
|
IMPL = db_api.DBAPI(backend_mapping=_BACKEND_MAPPING)
|
|
|
|
|
|
def get_instance():
|
|
"""Return a DB API instance."""
|
|
return IMPL
|
|
|
|
|
|
class Connection(object):
|
|
"""Base class for storage system connections."""
|
|
|
|
__metaclass__ = abc.ABCMeta
|
|
|
|
@abc.abstractmethod
|
|
def __init__(self):
|
|
"""Constructor."""
|