99 lines
3.4 KiB
Python
99 lines
3.4 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2013 IBM Corp.
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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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"""Notifications module for OpenStack Identity Service resources"""
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from keystone.openstack.common import log
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from keystone.openstack.common.notifier import api as notifier_api
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LOG = log.getLogger(__name__)
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class ManagerNotificationWrapper(object):
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"""Send event notifications for ``Manager`` methods.
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Sends a notification if the wrapped Manager method does not raise an
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``Exception`` (such as ``keystone.exception.NotFound``).
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:param resource_type: type of resource being affected
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:param host: host of the resource (optional)
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"""
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def __init__(self, operation, resource_type, host=None):
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self.operation = operation
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self.resource_type = resource_type
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self.host = host
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def __call__(self, f):
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def wrapper(*args, **kwargs):
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"""Send a notification if the wrapped callable is successful."""
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try:
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result = f(*args, **kwargs)
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except Exception:
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raise
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else:
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_send_notification(
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self.operation,
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self.resource_type,
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args[1], # f(self, resource_id, ...)
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self.host)
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return result
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return wrapper
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def created(*args, **kwargs):
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"""Decorator to send notifications for ``Manager.create_*`` methods."""
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return ManagerNotificationWrapper('created', *args, **kwargs)
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def updated(*args, **kwargs):
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"""Decorator to send notifications for ``Manager.update_*`` methods."""
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return ManagerNotificationWrapper('updated', *args, **kwargs)
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def deleted(*args, **kwargs):
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"""Decorator to send notifications for ``Manager.delete_*`` methods."""
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return ManagerNotificationWrapper('deleted', *args, **kwargs)
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def _send_notification(operation, resource_type, resource_id, host=None):
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"""Send notification to inform observers about the affected resource.
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This method doesn't raise an exception when sending the notification fails.
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:param operation: operation being performed (created, updated, or deleted)
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:param resource_type: type of resource being operated on
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:param resource_id: ID of resource being operated on
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:param host: resource host
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"""
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context = {}
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payload = {'resource_info': resource_id}
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service = 'identity'
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publisher_id = notifier_api.publisher_id(service, host=host)
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event_type = '%(service)s.%(resource_type)s.%(operation)s' % {
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'service': service,
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'resource_type': resource_type,
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'operation': operation}
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try:
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notifier_api.notify(
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context, publisher_id, event_type, notifier_api.INFO, payload)
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except Exception:
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LOG.exception(
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_('Failed to send %(res_id)s %(event_type)s notification'),
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{'res_id': resource_id, 'event_type': event_type})
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