45af61d7ee
Fixes bug 1039777 Due to changes in quantum/openstack/common/cfg.py, quantum/plugins/nicira/nicira_nvp_plugin/common/config.py also needed to be updated. Change-Id: Id240f8b5e2d80dde168b6d7c0eebeb9c5c398e42
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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# Copyright 2012, Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Exception related utilities.
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"""
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import contextlib
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import logging
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import sys
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import traceback
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@contextlib.contextmanager
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def save_and_reraise_exception():
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"""Save current exception, run some code and then re-raise.
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In some cases the exception context can be cleared, resulting in None
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being attempted to be re-raised after an exception handler is run. This
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can happen when eventlet switches greenthreads or when running an
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exception handler, code raises and catches an exception. In both
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cases the exception context will be cleared.
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To work around this, we save the exception state, run handler code, and
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then re-raise the original exception. If another exception occurs, the
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saved exception is logged and the new exception is re-raised.
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"""
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type_, value, tb = sys.exc_info()
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try:
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yield
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except Exception:
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logging.error('Original exception being dropped: %s' %
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(traceback.format_exception(type_, value, tb)))
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raise
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raise type_, value, tb
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