# 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.

"""

Load various modules for authorization and services.

"""

from stevedore import extension

from openstack import exceptions

class ModuleLoader(object):

def __init__(self):

self.auth_mgr = extension.ExtensionManager(

namespace="openstack.auth.plugin",

invoke_on_load=False,

)

def get_auth_plugin(self, plugin_name):

if not plugin_name:

plugin_name = 'identity'

try:

return self.auth_mgr[plugin_name].plugin

except KeyError:

msg = ('Could not find authorization plugin <%s>' % plugin_name)

raise exceptions.NoMatchingPlugin(msg)

def list_auth_plugins(self):

return self.auth_mgr.names()