dc7c101480
The 'driver_initiator_data_insert_by_key' DB API is exceptional in that it attempts to create a DB entry and returns a boolean value if there's a duplicate error rather than raise an exception. This means we need to do some special handling. Avoid the need for this special handling by raising an exception like everyone else and do the mapping to boolean values in the sole caller. Change-Id: I25472f592dbdb487fbbb376cb92ee0dda76b677a Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
# Copyright (c) 2014 Pure Storage, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log as logging
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from cinder import context
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from cinder import exception
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LOG = logging.getLogger(__name__)
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class VolumeDriverUtils(object):
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def __init__(self, namespace, db):
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self._data_namespace = namespace
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self._db = db
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@staticmethod
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def _get_context(ctxt):
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if not ctxt:
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return context.get_admin_context()
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return ctxt
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def get_driver_initiator_data(self, initiator, ctxt=None):
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try:
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return self._db.driver_initiator_data_get(
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self._get_context(ctxt),
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initiator,
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self._data_namespace
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)
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except exception.CinderException:
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LOG.exception("Failed to get driver initiator data for"
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" initiator %(initiator)s and namespace"
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" %(namespace)s",
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{'initiator': initiator,
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'namespace': self._data_namespace})
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raise
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def insert_driver_initiator_data(self, initiator, key, value, ctxt=None):
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"""Update the initiator data at key with value.
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If the key has already been set to something return False, otherwise
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if saved successfully return True.
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"""
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try:
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self._db.driver_initiator_data_insert_by_key(
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self._get_context(ctxt),
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initiator,
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self._data_namespace,
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key,
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value
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)
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return True
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except exception.DriverInitiatorDataExists:
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return False
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except exception.CinderException:
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LOG.exception("Failed to insert initiator data for"
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" initiator %(initiator)s and backend"
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" %(backend)s for key %(key)s.",
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{'initiator': initiator,
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'backend': self._data_namespace,
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'key': key})
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raise
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