Vishvananda Ishaya 7cca5a8ff7 Add local storage of context for logging
* adds nova/local.py:store for storing greenthread local data
 * saves a weak reference to the last context object created
 * uses the last context object if it exists for logging
 * Fixes bug 879582

Cc: stable-maintainers
Change-Id: Ic373556ce197f2e8e7d23c807a65b12111db96eb
2011-11-02 17:09:49 -07:00

38 lines
1.1 KiB
Python

# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 OpenStack LLC.
# 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.
"""Greenthread local storage of variables using weak references"""
import weakref
from eventlet import corolocal
class WeakLocal(corolocal.local):
def __getattribute__(self, attr):
rval = corolocal.local.__getattribute__(self, attr)
if rval:
rval = rval()
return rval
def __setattr__(self, attr, value):
value = weakref.ref(value)
return corolocal.local.__setattr__(self, attr, value)
store = WeakLocal()