python-troveclient/troveclient/extension.py
amcrn fce98a9173 Support Extensions to Trove Client
extensions on the contrib path (i.e. troveclient/v1/contrib/*.py),
extensions on the python path that follow the naming convention of
*_python_troveclient_ext, and entry-points will now be discovered
and loaded.

due to the mismatch of the api version and the troveclient
package name, '1.0' vs. '1', the client has been patched to look
for contrib in troveclient/v1 vs. the standard troveclient/v1_0

Change-Id: I3ea7bb5ba471b0d421581dcfda7216f429cb7b65
Closes-Bug: #1267577
2014-01-23 11:11:58 -08:00

40 lines
1.4 KiB
Python

# 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 troveclient import base
from troveclient import utils
class Extension(utils.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