nova/nova/api/openstack/versioned_method.py
Chris Yeoh 39a5a736d0 Implement microversion support on api methods
Adds support for specifying api versioning information
on api methods and the infrastructure to route requests
to the correct method based on the request information.
The api_version decorator allows us to retain the same
method name for different implementations (versions) of
the API method (GET/PUT/POST, etc).

Note that currently the @api_version decorator must
be the first (outermost) decorator on an API method.
We should in future have at least a hacking rule to enforce
this but better would be to remove this restriction.

Partially Implements Blueprint api-microversions

Change-Id: Ifb6698c582d37284c42b9b81100a651fd8d1dd1a
2014-12-05 09:54:41 +08:00

36 lines
1.2 KiB
Python

# Copyright 2014 IBM Corp.
#
# 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.
class VersionedMethod(object):
def __init__(self, name, start_version, end_version, func):
"""Versioning information for a single method
@name: Name of the method
@start_version: Minimum acceptable version
@end_version: Maximum acceptable_version
@func: Method to call
Minimum and maximums are inclusive
"""
self.name = name
self.start_version = start_version
self.end_version = end_version
self.func = func
def __str__(self):
return ("Version Method %s: min: %s, max: %s"
% (self.name, self.start_version, self.end_version))