OpenStack Compute (Nova) Client
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python-novaclient/novaclient/extension.py

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1.4 KiB

# Copyright 2011 OpenStack Foundation
# All Rights Reserved.
#
# 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.
from novaclient import base
from novaclient.openstack.common.apiclient import base as common_base
from novaclient import utils
class Extension(common_base.HookableMixin):
"""Extension descriptor."""
SUPPORTED_HOOKS = ('__pre_parse_args__', '__post_parse_args__')
def __init__(self, name, module):
self.name = name
self.module = module
self._parse_extension_module()
def _parse_extension_module(self):
self.manager_class = None
for attr_name, attr_value in self.module.__dict__.items():
if attr_name in self.SUPPORTED_HOOKS:
self.add_hook(attr_name, attr_value)
elif utils.safe_issubclass(attr_value, base.Manager):
self.manager_class = attr_value
def __repr__(self):
return "<Extension '%s'>" % self.name