54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
# 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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import abc
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import stevedore
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import keystone.conf
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from keystone.i18n import _
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CONF = keystone.conf.CONF
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def load_driver(driver_name, *args):
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namespace = 'keystone.unified_limit.model'
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try:
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driver_manager = stevedore.DriverManager(namespace,
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driver_name,
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invoke_on_load=True,
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invoke_args=args)
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return driver_manager.driver
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except stevedore.exception.NoMatches:
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msg = (_('Unable to find %(name)r driver in %(namespace)r.'))
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raise ImportError(msg % {'name': driver_name, 'namespace': namespace})
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class ModelBase(object, metaclass=abc.ABCMeta):
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"""Interface for a limit model driver."""
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NAME = None
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DESCRIPTION = None
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MAX_PROJECT_TREE_DEPTH = None
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def check_limit(self, limits):
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"""Check the new creating or updating limits if satisfy the model.
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:param limits: A list of the limit references to be checked.
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:type limits: A list of the limits. Each limit is a dictionary
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reference containing all limit attributes.
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:raises keystone.exception.InvalidLimit: If any of the input limits
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doesn't satisfy the limit model.
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"""
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raise NotImplementedError()
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