58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 OpenStack Foundation
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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 keystone import exception
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class DictKvs(dict):
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def get(self, key, default=None):
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try:
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if isinstance(self[key], dict):
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return self[key].copy()
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else:
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return self[key][:]
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except KeyError:
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if default is not None:
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return default
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raise exception.NotFound(target=key)
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def set(self, key, value):
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if isinstance(value, dict):
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self[key] = value.copy()
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else:
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self[key] = value[:]
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def delete(self, key):
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"""Deletes an item, returning True on success, False otherwise."""
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try:
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del self[key]
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except KeyError:
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raise exception.NotFound(target=key)
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INMEMDB = DictKvs()
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class Base(object):
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def __init__(self, db=None):
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if db is None:
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db = INMEMDB
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elif isinstance(db, DictKvs):
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db = db
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elif isinstance(db, dict):
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db = DictKvs(db)
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self.db = db
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