sahara/sahara/utils/rpc.py

40 lines
1.2 KiB
Python

# Copyright (c) 2013 Mirantis Inc.
#
# 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 sahara.openstack.common.rpc import common as rpc_common
class RpcExceptionPassthrough(object):
"""Class to wrap another and translate the ClientExceptions raised by its
function calls to the actual ones.
"""
def __init__(self, target):
self._target = target
def __getattr__(self, name):
func = getattr(self._target, name)
@functools.wraps(func)
def wrapper(*args, **kwargs):
try:
return func(*args, **kwargs)
except rpc_common.ClientException as e:
raise (e._exc_info[1], None, e._exc_info[2])
return wrapper