OpenStack Study: extensions.py

**** CubicPower OpenStack Study ****

# 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 oslo.config import cfg

from nova.api.openstack import extensions as base_extensions

from nova.openstack.common.gettextutils import _

from nova.openstack.common import log as logging

ext_opts = [

cfg.MultiStrOpt('osapi_compute_extension',

default=[

'nova.api.openstack.compute.contrib.standard_extensions'

],

help='osapi compute extension to load'),

]

CONF = cfg.CONF

CONF.register_opts(ext_opts)

LOG = logging.getLogger(__name__)

**** CubicPower OpenStack Study ****

class ExtensionManager(base_extensions.ExtensionManager):

**** CubicPower OpenStack Study ****

    def __init__(self):

        LOG.audit(_('Initializing extension manager.'))

        self.cls_list = CONF.osapi_compute_extension

        self.extensions = {}

        self.sorted_ext_list = []

        self._load_extensions()