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OpenStack Study: core.py**** CubicPower OpenStack Study ****
# Copyright 2012 OpenStack Foundation # # 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 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. """Main entry point into the Policy service.""" import abc import six from keystone.common import dependency from keystone.common import manager from keystone import config from keystone import exception CONF = config.CONF @dependency.provider('policy_api')
**** CubicPower OpenStack Study **** class Manager(manager.Manager): """Default pivot point for the Policy backend. See :mod:`keystone.common.manager.Manager` for more details on how this dynamically calls the backend. """
**** CubicPower OpenStack Study **** def __init__(self): super(Manager, self).__init__(CONF.policy.driver)
**** CubicPower OpenStack Study **** def get_policy(self, policy_id): try: return self.driver.get_policy(policy_id) except exception.NotFound: raise exception.PolicyNotFound(policy_id=policy_id)
**** CubicPower OpenStack Study **** def update_policy(self, policy_id, policy): if 'id' in policy and policy_id != policy['id']: raise exception.ValidationError('Cannot change policy ID') try: return self.driver.update_policy(policy_id, policy) except exception.NotFound: raise exception.PolicyNotFound(policy_id=policy_id) @manager.response_truncated
**** CubicPower OpenStack Study **** def list_policies(self, hints=None): # NOTE(henry-nash): Since the advantage of filtering or list limiting # of policies at the driver level is minimal, we leave this to the # caller. return self.driver.list_policies()
**** CubicPower OpenStack Study **** def delete_policy(self, policy_id): try: return self.driver.delete_policy(policy_id) except exception.NotFound: raise exception.PolicyNotFound(policy_id=policy_id) @six.add_metaclass(abc.ABCMeta)
**** CubicPower OpenStack Study **** class Driver(object):
**** CubicPower OpenStack Study **** def _get_list_limit(self): return CONF.policy.list_limit or CONF.list_limit @abc.abstractmethod
**** CubicPower OpenStack Study **** def enforce(self, context, credentials, action, target): """Verify that a user is authorized to perform action. For more information on a full implementation of this see: `keystone.common.policy.enforce`. """ raise exception.NotImplemented() @abc.abstractmethod
**** CubicPower OpenStack Study **** def create_policy(self, policy_id, policy): """Store a policy blob. :raises: keystone.exception.Conflict """ raise exception.NotImplemented() @abc.abstractmethod
**** CubicPower OpenStack Study **** def list_policies(self): """List all policies.""" raise exception.NotImplemented() @abc.abstractmethod
**** CubicPower OpenStack Study **** def get_policy(self, policy_id): """Retrieve a specific policy blob. :raises: keystone.exception.PolicyNotFound """ raise exception.NotImplemented() @abc.abstractmethod
**** CubicPower OpenStack Study **** def update_policy(self, policy_id, policy): """Update a policy blob. :raises: keystone.exception.PolicyNotFound """ raise exception.NotImplemented() @abc.abstractmethod
**** CubicPower OpenStack Study **** def delete_policy(self, policy_id): """Remove a policy blob. :raises: keystone.exception.PolicyNotFound """ raise exception.NotImplemented()
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