67 lines
2.6 KiB
Python
67 lines
2.6 KiB
Python
# Copyright 2014 VMware, Inc.
|
|
# 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.
|
|
|
|
import inspect
|
|
|
|
from neutron.plugins.vmware.api_client import exception
|
|
|
|
DEFAULT_VERSION = -1
|
|
|
|
|
|
def versioned(func_table):
|
|
|
|
def versioned_function(wrapped_func):
|
|
func_name = wrapped_func.__name__
|
|
|
|
def dispatch_versioned_function(cluster, *args, **kwargs):
|
|
# Call the wrapper function, in case we need to
|
|
# run validation checks regarding versions. It
|
|
# should return the NSX version
|
|
v = (wrapped_func(cluster, *args, **kwargs) or
|
|
cluster.api_client.get_version())
|
|
func = get_function_by_version(func_table, func_name, v)
|
|
func_kwargs = kwargs
|
|
arg_spec = inspect.getargspec(func)
|
|
if not arg_spec.keywords and not arg_spec.varargs:
|
|
# drop args unknown to function from func_args
|
|
arg_set = set(func_kwargs.keys())
|
|
for arg in arg_set - set(arg_spec.args):
|
|
del func_kwargs[arg]
|
|
# NOTE(salvatore-orlando): shall we fail here if a required
|
|
# argument is not passed, or let the called function raise?
|
|
return func(cluster, *args, **func_kwargs)
|
|
|
|
return dispatch_versioned_function
|
|
return versioned_function
|
|
|
|
|
|
def get_function_by_version(func_table, func_name, ver):
|
|
if ver:
|
|
if ver.major not in func_table[func_name]:
|
|
major = max(func_table[func_name].keys())
|
|
minor = max(func_table[func_name][major].keys())
|
|
if major > ver.major:
|
|
raise NotImplementedError(_("Operation may not be supported"))
|
|
else:
|
|
major = ver.major
|
|
minor = ver.minor
|
|
if ver.minor not in func_table[func_name][major]:
|
|
minor = DEFAULT_VERSION
|
|
return func_table[func_name][major][minor]
|
|
else:
|
|
msg = _('NSX version is not set. Unable to complete request '
|
|
'correctly. Check log for NSX communication errors.')
|
|
raise exception.ServiceUnavailable(message=msg)
|