45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
# 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.
|
|
|
|
import functools
|
|
|
|
from keystone.openstack.common import importutils
|
|
|
|
|
|
class Manager(object):
|
|
"""Base class for intermediary request layer.
|
|
|
|
The Manager layer exists to support additional logic that applies to all
|
|
or some of the methods exposed by a service that are not specific to the
|
|
HTTP interface.
|
|
|
|
It also provides a stable entry point to dynamic backends.
|
|
|
|
An example of a probable use case is logging all the calls.
|
|
|
|
"""
|
|
|
|
def __init__(self, driver_name):
|
|
self.driver = importutils.import_object(driver_name)
|
|
|
|
def __getattr__(self, name):
|
|
"""Forward calls to the underlying driver."""
|
|
f = getattr(self.driver, name)
|
|
|
|
@functools.wraps(f)
|
|
def _wrapper(*args, **kw):
|
|
return f(*args, **kw)
|
|
setattr(self, name, _wrapper)
|
|
return _wrapper
|