ee537e33de
The common RPC code has been updated to include the following:
8575d87af49ea276341908f83c8c51db13afca44
8b2b0b743e84ceed7841cf470afed6a5da8e1d07
23f602940c64ba408d77ceb8f5ba0f67ee4a18ef
6d0a6c3083218cdac52758a8b6aac6b03402c658
7cac1ac1bd9df36d4e5183afac3b643df10b1d4d
8159efddabb09dd9b7c99963ff7c9de0a6c62b62
Updated to include the following in modules in openstack-common.conf:
py3kcompat, sslutils, and versionutils.
The update also includes imports from the RPC code
Change-Id: I84c5b8e2b17da0018dd69ecb354d123a609afe98
100 lines
3.6 KiB
Python
100 lines
3.6 KiB
Python
# Copyright 2011 OpenStack Foundation.
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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 logging
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import sys
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import time
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import traceback
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import six
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from neutron.openstack.common.gettextutils import _
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class save_and_reraise_exception(object):
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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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In some cases the caller may not want to re-raise the exception, and
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for those circumstances this context provides a reraise flag that
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can be used to suppress the exception. For example::
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except Exception:
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with save_and_reraise_exception() as ctxt:
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decide_if_need_reraise()
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if not should_be_reraised:
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ctxt.reraise = False
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"""
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def __init__(self):
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self.reraise = True
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def __enter__(self):
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self.type_, self.value, self.tb, = sys.exc_info()
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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if exc_type is not None:
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logging.error(_('Original exception being dropped: %s'),
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traceback.format_exception(self.type_,
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self.value,
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self.tb))
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return False
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if self.reraise:
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six.reraise(self.type_, self.value, self.tb)
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def forever_retry_uncaught_exceptions(infunc):
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def inner_func(*args, **kwargs):
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last_log_time = 0
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last_exc_message = None
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exc_count = 0
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while True:
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try:
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return infunc(*args, **kwargs)
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except Exception as exc:
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this_exc_message = six.u(str(exc))
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if this_exc_message == last_exc_message:
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exc_count += 1
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else:
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exc_count = 1
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# Do not log any more frequently than once a minute unless
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# the exception message changes
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cur_time = int(time.time())
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if (cur_time - last_log_time > 60 or
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this_exc_message != last_exc_message):
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logging.exception(
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_('Unexpected exception occurred %d time(s)... '
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'retrying.') % exc_count)
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last_log_time = cur_time
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last_exc_message = this_exc_message
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exc_count = 0
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# This should be a very rare event. In case it isn't, do
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# a sleep.
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time.sleep(1)
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return inner_func
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