nova/nova/tests/unit/fake_notifier.py

75 lines
2.7 KiB
Python

# Copyright 2013 Red Hat, Inc.
#
# 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.
import collections
import functools
import oslo_messaging as messaging
from oslo_serialization import jsonutils
from nova import rpc
NOTIFICATIONS = []
def reset():
del NOTIFICATIONS[:]
FakeMessage = collections.namedtuple('Message',
['publisher_id', 'priority',
'event_type', 'payload', 'context'])
class FakeNotifier(object):
def __init__(self, transport, publisher_id, serializer=None):
self.transport = transport
self.publisher_id = publisher_id
self._serializer = serializer or messaging.serializer.NoOpSerializer()
for priority in ['debug', 'info', 'warn', 'error', 'critical']:
setattr(self, priority,
functools.partial(self._notify, priority.upper()))
def prepare(self, publisher_id=None):
if publisher_id is None:
publisher_id = self.publisher_id
return self.__class__(self.transport, publisher_id,
serializer=self._serializer)
def _notify(self, priority, ctxt, event_type, payload):
payload = self._serializer.serialize_entity(ctxt, payload)
# NOTE(sileht): simulate the kombu serializer
# this permit to raise an exception if something have not
# been serialized correctly
jsonutils.to_primitive(payload)
# NOTE(melwitt): Try to serialize the context, as the rpc would.
# An exception will be raised if something is wrong
# with the context.
self._serializer.serialize_context(ctxt)
msg = FakeMessage(self.publisher_id, priority, event_type,
payload, ctxt)
NOTIFICATIONS.append(msg)
def stub_notifier(stubs):
stubs.Set(messaging, 'Notifier', FakeNotifier)
if rpc.NOTIFIER:
stubs.Set(rpc, 'NOTIFIER',
FakeNotifier(rpc.NOTIFIER.transport,
rpc.NOTIFIER.publisher_id,
serializer=getattr(rpc.NOTIFIER, '_serializer',
None)))