71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
# Copyright 2011 OpenStack LLC.
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# All Rights Reserved.
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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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from nova import flags
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from nova import log as logging
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from nova.openstack.common import cfg
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from nova.openstack.common import importutils
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list_notifier_drivers_opt = cfg.MultiStrOpt('list_notifier_drivers',
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default=['nova.notifier.no_op_notifier'],
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help='List of drivers to send notifications')
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FLAGS = flags.FLAGS
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FLAGS.register_opt(list_notifier_drivers_opt)
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LOG = logging.getLogger(__name__)
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drivers = None
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class ImportFailureNotifier(object):
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"""Noisily re-raises some exception over-and-over when notify is called."""
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def __init__(self, exception):
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self.exception = exception
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def notify(self, context, message):
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raise self.exception
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def _get_drivers():
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"""Instantiates and returns drivers based on the flag values."""
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global drivers
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if not drivers:
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drivers = []
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for notification_driver in FLAGS.list_notifier_drivers:
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try:
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drivers.append(importutils.import_module(notification_driver))
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except ImportError as e:
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drivers.append(ImportFailureNotifier(e))
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return drivers
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def notify(context, message):
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"""Passes notification to multiple notifiers in a list."""
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for driver in _get_drivers():
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try:
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driver.notify(context, message)
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except Exception as e:
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LOG.exception(_("Problem '%(e)s' attempting to send to "
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"notification driver %(driver)s."), locals())
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def _reset_drivers():
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"""Used by unit tests to reset the drivers."""
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global drivers
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drivers = None
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