75905790e5
- add devstack plugin - update openstack common - move unit tests to unit folder - update infrastructural files Change-Id: Id72006f70110dbd1762f42b582470ac5f3439f2a
104 lines
2.9 KiB
Python
104 lines
2.9 KiB
Python
# Copyright 2014
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# The Cloudscaling Group, Inc.
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#
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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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#
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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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"""Defines interface for DB access.
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Functions in this module are imported into the gceapi.db namespace. Call these
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functions from gceapi.db namespace, not the gceapi.db.api namespace.
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**Related Flags**
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:dbackend: string to lookup in the list of LazyPluggable backends.
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`sqlalchemy` is the only supported backend right now.
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:connection: string specifying the sqlalchemy connection to use, like:
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`sqlite:///var/lib/gceapi/gceapi.sqlite`.
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"""
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from eventlet import tpool
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from oslo_config import cfg
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from oslo_db import api as db_api
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from oslo_log import log as logging
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tpool_opts = [
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cfg.BoolOpt('use_tpool',
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default=False,
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deprecated_name='dbapi_use_tpool',
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deprecated_group='DEFAULT',
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help='Enable the experimental use of thread pooling for '
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'all DB API calls'),
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]
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CONF = cfg.CONF
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CONF.register_opts(tpool_opts, 'database')
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_BACKEND_MAPPING = {'sqlalchemy': 'gceapi.db.sqlalchemy.api'}
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class GCEDBAPI(object):
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"""gce's DB API wrapper class.
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This wraps the oslo DB API with an option to be able to use eventlet's
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thread pooling. Since the CONF variable may not be loaded at the time
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this class is instantiated, we must look at it on the first DB API call.
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"""
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def __init__(self):
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self.__db_api = None
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@property
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def _db_api(self):
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if not self.__db_api:
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gce_db_api = db_api.DBAPI(CONF.database.backend,
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backend_mapping=_BACKEND_MAPPING)
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if CONF.database.use_tpool:
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self.__db_api = tpool.Proxy(gce_db_api)
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else:
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self.__db_api = gce_db_api
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return self.__db_api
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def __getattr__(self, key):
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return getattr(self._db_api, key)
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IMPL = GCEDBAPI()
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LOG = logging.getLogger(__name__)
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def add_item(context, kind, data):
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IMPL.add_item(context, kind, data)
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def delete_item(context, kind, item_id):
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IMPL.delete_item(context, kind, item_id)
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def update_item(context, kind, item):
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IMPL.update_item(context, kind, item)
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def get_items(context, kind):
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return IMPL.get_items(context, kind)
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def get_item_by_id(context, kind, item_id):
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return IMPL.get_item_by_id(context, kind, item_id)
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def get_item_by_name(context, kind, name):
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return IMPL.get_item_by_name(context, kind, name)
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