d8e0dc21e0
Add support to oslo.db to be used as a DB driver. The DB driver will be
used with API v2. When it's completely implemented, API V1 will be
deprecated and removed by the end of the cycle. Freezer-api will keep
supporting V2 with Elasticsearch, Sqlalchemy drivers.
This patch implements the follow:
* Abstract Base DB driver to be implemented by each driver
* Base driver; will return only access to the db engine, session
* SqlAlchemy driver;
* ElasticSearch driver;
* Implement both drivers in freezer-manage
Partially-Implements: blueprint oslo-db
Depends-On: I81e417155da48f46dd2113e5745fb3c21c96499f
Depends-On: I2e5724b1f1a75121952e2beb3844d2c489e4df68
Depends-On: Idb4ac050652d1d0107bf3fcd447d7cbedd811809
Depends-On: I81d46c89859752c0cbc21ef02de90db7f19f942c
Change-Id: I93ed1b909f538728a1a9bd5c8b07baf7aeddb705
46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
"""
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(C) Copyright 2016-2018 Hewlett Packard Enterprise Development Company LP
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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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,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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from oslo_config import cfg
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from oslo_log import log
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from oslo_utils import importutils
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CONF = cfg.CONF
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LOG = log.getLogger(__name__)
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# storage backend options to be registered
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_OPTS = [
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cfg.StrOpt("backend",
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help="Database backend section name. This section "
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"will be loaded by the proper driver to connect to "
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"the database."
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),
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cfg.StrOpt('driver',
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default='freezer_api.storage.elastic.ElasticSearchEngine',
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help="Database driver to be used."
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)
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]
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def get_db(driver=None):
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"""Automatically loads the database driver to be used."""
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storage = CONF.get('storage')
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if not driver:
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driver = storage['driver']
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driver_instance = importutils.import_object(
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driver,
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backend=storage['backend']
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)
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return driver_instance
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