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synapse/tests/replication/slave/storage/_base.py
Erik Johnston 748d8fdc7b Reduce DB hits for replication
Some streams will occaisonally advance their positions without actually
having any new rows to send over federation. Currently this means that
the token will not advance on the workers, leading to them repeatedly
sending a slightly out of date token. This in turns requires the master
to hit the DB to check if there are any new rows, rather than hitting
the no op logic where we check if the given token matches the current
token.

This commit changes the API to always return an entry if the position
for a stream has changed, allowing workers to advance their tokens
correctly.
2016-09-23 16:49:21 +01:00

56 lines
2.1 KiB
Python

# Copyright 2016 OpenMarket Ltd
#
# 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.
from twisted.internet import defer
from tests import unittest
from mock import Mock, NonCallableMock
from tests.utils import setup_test_homeserver
from synapse.replication.resource import ReplicationResource
class BaseSlavedStoreTestCase(unittest.TestCase):
@defer.inlineCallbacks
def setUp(self):
self.hs = yield setup_test_homeserver(
"blue",
http_client=None,
replication_layer=Mock(),
ratelimiter=NonCallableMock(spec_set=[
"send_message",
]),
)
self.hs.get_ratelimiter().send_message.return_value = (True, 0)
self.replication = ReplicationResource(self.hs)
self.master_store = self.hs.get_datastore()
self.slaved_store = self.STORE_TYPE(self.hs.get_db_conn(), self.hs)
self.event_id = 0
@defer.inlineCallbacks
def replicate(self):
streams = self.slaved_store.stream_positions()
writer = yield self.replication.replicate(streams, 100)
result = writer.finish()
yield self.slaved_store.process_replication(result)
@defer.inlineCallbacks
def check(self, method, args, expected_result=None):
master_result = yield getattr(self.master_store, method)(*args)
slaved_result = yield getattr(self.slaved_store, method)(*args)
if expected_result is not None:
self.assertEqual(master_result, expected_result)
self.assertEqual(slaved_result, expected_result)
self.assertEqual(master_result, slaved_result)