Source code for keystone.limit.models.base
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# under the License.
import abc
import stevedore
import keystone.conf
from keystone.i18n import _
CONF = keystone.conf.CONF
[docs]def load_driver(driver_name, *args):
namespace = 'keystone.unified_limit.model'
try:
driver_manager = stevedore.DriverManager(namespace,
driver_name,
invoke_on_load=True,
invoke_args=args)
return driver_manager.driver
except stevedore.exception.NoMatches:
msg = (_('Unable to find %(name)r driver in %(namespace)r.'))
raise ImportError(msg % {'name': driver_name, 'namespace': namespace})
[docs]class ModelBase(object, metaclass=abc.ABCMeta):
"""Interface for a limit model driver."""
NAME = None
DESCRIPTION = None
MAX_PROJECT_TREE_DEPTH = None
[docs] def check_limit(self, limits):
"""Check the new creating or updating limits if satisfy the model.
:param limits: A list of the limit references to be checked.
:type limits: A list of the limits. Each limit is a dictionary
reference containing all limit attributes.
:raises keystone.exception.InvalidLimit: If any of the input limits
doesn't satisfy the limit model.
"""
raise NotImplementedError()