975d6641f4
Change-Id: I0f018fe963256658682676fcd86520ceae590c75
390 lines
16 KiB
Python
390 lines
16 KiB
Python
# Copyright 2015 OpenStack Foundation
|
|
#
|
|
# 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 mock
|
|
|
|
from oslo_db import exception as db_exc
|
|
from oslotest import base
|
|
|
|
from neutron_lib.callbacks import events
|
|
from neutron_lib.callbacks import exceptions
|
|
from neutron_lib.callbacks import manager
|
|
from neutron_lib.callbacks import priority_group
|
|
from neutron_lib.callbacks import resources
|
|
|
|
|
|
PRI_HIGH = 0
|
|
PRI_MED = 5000
|
|
PRI_LOW = 10000
|
|
|
|
|
|
class ObjectWithCallback(object):
|
|
|
|
def __init__(self):
|
|
self.counter = 0
|
|
|
|
def callback(self, *args, **kwargs):
|
|
self.counter += 1
|
|
|
|
|
|
class GloriousObjectWithCallback(ObjectWithCallback):
|
|
pass
|
|
|
|
|
|
def callback_1(*args, **kwargs):
|
|
callback_1.counter += 1
|
|
|
|
|
|
callback_id_1 = manager._get_id(callback_1)
|
|
|
|
|
|
def callback_2(*args, **kwargs):
|
|
callback_2.counter += 1
|
|
|
|
|
|
callback_id_2 = manager._get_id(callback_2)
|
|
|
|
|
|
def callback_raise(*args, **kwargs):
|
|
raise Exception()
|
|
|
|
|
|
def callback_raise_retriable(*args, **kwargs):
|
|
raise db_exc.DBDeadlock()
|
|
|
|
|
|
def callback_3(resource, event, trigger, payload):
|
|
callback_3.counter += 1
|
|
|
|
|
|
class CallBacksManagerTestCase(base.BaseTestCase):
|
|
|
|
def setUp(self):
|
|
super(CallBacksManagerTestCase, self).setUp()
|
|
self.manager = manager.CallbacksManager()
|
|
callback_1.counter = 0
|
|
callback_2.counter = 0
|
|
callback_3.counter = 0
|
|
|
|
def test_subscribe(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertIsNotNone(
|
|
self.manager._callbacks[resources.PORT][events.BEFORE_CREATE])
|
|
self.assertIn(callback_id_1, self.manager._index)
|
|
self.assertEqual(self.__module__ + '.callback_1-%s' %
|
|
hash(callback_1), callback_id_1)
|
|
|
|
def test_subscribe_unknown(self):
|
|
self.manager.subscribe(
|
|
callback_1, 'my_resource', 'my-event')
|
|
self.assertIsNotNone(
|
|
self.manager._callbacks['my_resource']['my-event'])
|
|
self.assertIn(callback_id_1, self.manager._index)
|
|
|
|
def test_subscribe_is_idempotent(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertEqual(
|
|
1,
|
|
len(self.manager._callbacks[resources.PORT][events.BEFORE_CREATE]))
|
|
callbacks = self.manager._index[callback_id_1][resources.PORT]
|
|
self.assertEqual(1, len(callbacks))
|
|
|
|
def test_subscribe_multiple_callbacks(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_2, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertEqual(2, len(self.manager._index))
|
|
self.assertEqual(
|
|
1,
|
|
len(self.manager._callbacks[resources.PORT][events.BEFORE_CREATE]))
|
|
self.assertEqual(
|
|
2,
|
|
len(self.manager._callbacks
|
|
[resources.PORT][events.BEFORE_CREATE][0][1]))
|
|
|
|
def test_unsubscribe_during_iteration(self):
|
|
def unsub(r, e, *a, **k):
|
|
return self.manager.unsubscribe(unsub, r, e)
|
|
|
|
self.manager.subscribe(unsub, resources.PORT,
|
|
events.BEFORE_CREATE)
|
|
self.manager.notify(resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
self.assertNotIn(unsub, self.manager._index)
|
|
|
|
def test_unsubscribe(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.unsubscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertNotIn(
|
|
callback_id_1,
|
|
self.manager._callbacks[resources.PORT][events.BEFORE_CREATE])
|
|
self.assertNotIn(callback_id_1, self.manager._index)
|
|
|
|
def test_unsubscribe_unknown_callback(self):
|
|
self.manager.subscribe(
|
|
callback_2, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.unsubscribe(callback_1, mock.ANY, mock.ANY)
|
|
self.assertEqual(1, len(self.manager._index))
|
|
|
|
def test_fail_to_unsubscribe(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertRaises(exceptions.Invalid,
|
|
self.manager.unsubscribe,
|
|
callback_1, resources.PORT, None)
|
|
self.assertRaises(exceptions.Invalid,
|
|
self.manager.unsubscribe,
|
|
callback_1, None, events.BEFORE_CREATE)
|
|
|
|
def test_unsubscribe_is_idempotent(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.unsubscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.unsubscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertNotIn(callback_id_1, self.manager._index)
|
|
self.assertNotIn(callback_id_1,
|
|
self.manager._callbacks[resources.PORT]
|
|
[events.BEFORE_CREATE])
|
|
|
|
def test_unsubscribe_by_resource(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_DELETE)
|
|
self.manager.subscribe(
|
|
callback_2, resources.PORT, events.BEFORE_DELETE)
|
|
self.manager.unsubscribe_by_resource(callback_1, resources.PORT)
|
|
self.assertEqual(
|
|
0,
|
|
len(self.manager._callbacks
|
|
[resources.PORT][events.BEFORE_CREATE]))
|
|
self.assertEqual(
|
|
1,
|
|
len(self.manager._callbacks[resources.PORT][events.BEFORE_DELETE]))
|
|
self.assertIn(
|
|
callback_id_2,
|
|
self.manager._callbacks
|
|
[resources.PORT][events.BEFORE_DELETE][0][1])
|
|
self.assertNotIn(callback_id_1, self.manager._index)
|
|
|
|
def test_unsubscribe_all(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_DELETE)
|
|
self.manager.subscribe(
|
|
callback_1, resources.ROUTER, events.BEFORE_CREATE)
|
|
self.manager.unsubscribe_all(callback_1)
|
|
self.assertNotIn(
|
|
callback_id_1,
|
|
self.manager._callbacks[resources.PORT][events.BEFORE_CREATE])
|
|
self.assertNotIn(callback_id_1, self.manager._index)
|
|
|
|
def test_notify_none(self):
|
|
self.manager.notify(resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
self.assertEqual(0, callback_1.counter)
|
|
self.assertEqual(0, callback_2.counter)
|
|
|
|
def test_feebly_referenced_callback(self):
|
|
self.manager.subscribe(lambda *x, **y: None, resources.PORT,
|
|
events.BEFORE_CREATE)
|
|
self.manager.notify(resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
|
|
def test_notify_with_exception(self):
|
|
with mock.patch.object(self.manager, '_notify_loop') as n:
|
|
n.return_value = ['error']
|
|
self.assertRaises(exceptions.CallbackFailure,
|
|
self.manager.notify,
|
|
mock.ANY, events.BEFORE_CREATE, mock.ANY)
|
|
expected_calls = [
|
|
mock.call(mock.ANY, 'before_create', mock.ANY),
|
|
mock.call(mock.ANY, 'abort_create', mock.ANY)
|
|
]
|
|
n.assert_has_calls(expected_calls)
|
|
|
|
def test_notify_with_precommit_exception(self):
|
|
with mock.patch.object(self.manager, '_notify_loop') as n:
|
|
n.return_value = ['error']
|
|
self.assertRaises(exceptions.CallbackFailure,
|
|
self.manager.notify,
|
|
mock.ANY, events.PRECOMMIT_UPDATE, mock.ANY)
|
|
expected_calls = [
|
|
mock.call(mock.ANY, 'precommit_update', mock.ANY),
|
|
]
|
|
n.assert_has_calls(expected_calls)
|
|
|
|
def test_notify_handle_exception(self):
|
|
self.manager.subscribe(
|
|
callback_raise, resources.PORT, events.BEFORE_CREATE)
|
|
e = self.assertRaises(exceptions.CallbackFailure, self.manager.notify,
|
|
resources.PORT, events.BEFORE_CREATE, self)
|
|
self.assertIsInstance(e.errors[0], exceptions.NotificationError)
|
|
|
|
def test_notify_handle_retriable_exception(self):
|
|
self.manager.subscribe(
|
|
callback_raise_retriable, resources.PORT, events.BEFORE_CREATE)
|
|
self.assertRaises(db_exc.RetryRequest, self.manager.notify,
|
|
resources.PORT, events.BEFORE_CREATE, self)
|
|
|
|
def test_notify_called_once_with_no_failures(self):
|
|
with mock.patch.object(self.manager, '_notify_loop') as n:
|
|
n.return_value = False
|
|
self.manager.notify(resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
n.assert_called_once_with(
|
|
resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
|
|
def test__notify_loop_single_event(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_2, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager._notify_loop(
|
|
resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
self.assertEqual(1, callback_1.counter)
|
|
self.assertEqual(1, callback_2.counter)
|
|
|
|
def test__notify_loop_multiple_events(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_1, resources.ROUTER, events.BEFORE_DELETE)
|
|
self.manager.subscribe(
|
|
callback_2, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager._notify_loop(
|
|
resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
self.manager._notify_loop(
|
|
resources.ROUTER, events.BEFORE_DELETE, mock.ANY)
|
|
self.assertEqual(2, callback_1.counter)
|
|
self.assertEqual(1, callback_2.counter)
|
|
|
|
def test_clearing_subscribers(self):
|
|
self.manager.subscribe(
|
|
callback_1, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_2, resources.PORT, events.AFTER_CREATE)
|
|
self.assertEqual(2, len(self.manager._callbacks[resources.PORT]))
|
|
self.assertEqual(2, len(self.manager._index))
|
|
self.manager.clear()
|
|
self.assertEqual(0, len(self.manager._callbacks))
|
|
self.assertEqual(0, len(self.manager._index))
|
|
|
|
def test_callback_priority(self):
|
|
pri_first = priority_group.PRIORITY_DEFAULT - 100
|
|
pri_last = priority_group.PRIORITY_DEFAULT + 100
|
|
# lowest priority value should be first in the _callbacks
|
|
self.manager.subscribe(callback_1, 'my-resource', 'my-event')
|
|
self.manager.subscribe(callback_2, 'my-resource',
|
|
'my-event', pri_last)
|
|
self.manager.subscribe(callback_3, 'my-resource',
|
|
'my-event', pri_first)
|
|
callbacks = self.manager._callbacks['my-resource']['my-event']
|
|
# callbacks should be sorted based on priority for resource and event
|
|
self.assertEqual(3, len(callbacks))
|
|
self.assertEqual(pri_first, callbacks[0][0])
|
|
self.assertEqual(priority_group.PRIORITY_DEFAULT, callbacks[1][0])
|
|
self.assertEqual(pri_last, callbacks[2][0])
|
|
|
|
@mock.patch('neutron_lib.callbacks.manager.CallbacksManager._del_callback')
|
|
def test_del_callback_called_on_unsubscribe(self, mock_cb):
|
|
self.manager.subscribe(callback_1, 'my-resource', 'my-event')
|
|
callback_id = self.manager._find(callback_1)
|
|
callbacks = self.manager._callbacks['my-resource']['my-event']
|
|
self.assertEqual(1, len(callbacks))
|
|
self.manager.unsubscribe(callback_1, 'my-resource', 'my-event')
|
|
mock_cb.assert_called_once_with(callbacks, callback_id)
|
|
|
|
@mock.patch("neutron_lib.callbacks.manager.LOG")
|
|
def test_callback_order(self, _logger):
|
|
self.manager.subscribe(callback_1, 'my-resource', 'my-event', PRI_MED)
|
|
self.manager.subscribe(callback_2, 'my-resource', 'my-event', PRI_HIGH)
|
|
self.manager.subscribe(callback_3, 'my-resource', 'my-event', PRI_LOW)
|
|
self.assertEqual(
|
|
3, len(self.manager._callbacks['my-resource']['my-event']))
|
|
self.manager.unsubscribe(callback_3, 'my-resource', 'my-event')
|
|
self.manager.notify('my-resource', 'my-event', mock.ANY)
|
|
# callback_3 should be deleted and not executed
|
|
self.assertEqual(
|
|
2, len(self.manager._callbacks['my-resource']['my-event']))
|
|
self.assertEqual(0, callback_3.counter)
|
|
# executed callbacks should have counter incremented
|
|
self.assertEqual(1, callback_2.counter)
|
|
self.assertEqual(1, callback_1.counter)
|
|
callback_ids = _logger.debug.mock_calls[4][1][1]
|
|
# callback_2 should be first in exceution as it has higher priority
|
|
self.assertEqual(callback_id_2, callback_ids[0])
|
|
self.assertEqual(callback_id_1, callback_ids[1])
|
|
|
|
@mock.patch("neutron_lib.callbacks.manager.LOG")
|
|
def test__notify_loop_skip_log_errors(self, _logger):
|
|
self.manager.subscribe(
|
|
callback_raise, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.subscribe(
|
|
callback_raise, resources.PORT, events.PRECOMMIT_CREATE)
|
|
self.manager._notify_loop(
|
|
resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
self.manager._notify_loop(
|
|
resources.PORT, events.PRECOMMIT_CREATE, mock.ANY)
|
|
self.assertFalse(_logger.exception.call_count)
|
|
self.assertTrue(_logger.debug.call_count)
|
|
|
|
def test_object_instances_as_subscribers(self):
|
|
"""Ensures that the manager doesn't think these are equivalent."""
|
|
a = GloriousObjectWithCallback()
|
|
b = ObjectWithCallback()
|
|
c = ObjectWithCallback()
|
|
for o in (a, b, c):
|
|
self.manager.subscribe(
|
|
o.callback, resources.PORT, events.BEFORE_CREATE)
|
|
# ensure idempotency remains for a single object
|
|
self.manager.subscribe(
|
|
o.callback, resources.PORT, events.BEFORE_CREATE)
|
|
self.manager.notify(resources.PORT, events.BEFORE_CREATE, mock.ANY)
|
|
self.assertEqual(1, a.counter)
|
|
self.assertEqual(1, b.counter)
|
|
self.assertEqual(1, c.counter)
|
|
|
|
def test_publish_invalid_payload(self):
|
|
self.assertRaises(exceptions.Invalid, self.manager.publish,
|
|
resources.PORT, events.AFTER_DELETE, self,
|
|
payload=object())
|
|
|
|
def test_publish_empty_payload(self):
|
|
notify_payload = []
|
|
|
|
def _memo(resource, event, trigger, payload=None):
|
|
notify_payload.append(payload)
|
|
|
|
self.manager.subscribe(_memo, 'x', 'y')
|
|
self.manager.publish('x', 'y', self)
|
|
self.assertIsNone(notify_payload[0])
|
|
|
|
def test_publish_payload(self):
|
|
notify_payload = []
|
|
|
|
def _memo(resource, event, trigger, payload=None):
|
|
notify_payload.append(payload)
|
|
|
|
self.manager.subscribe(_memo, 'x', 'y')
|
|
payload = events.EventPayload(object())
|
|
self.manager.publish('x', 'y', self, payload=payload)
|
|
self.assertEqual(payload, notify_payload[0])
|