diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/storage/databases/test_state_store.py | 454 |
1 files changed, 0 insertions, 454 deletions
diff --git a/tests/storage/databases/test_state_store.py b/tests/storage/databases/test_state_store.py deleted file mode 100644 index 2b484c95a9..0000000000 --- a/tests/storage/databases/test_state_store.py +++ /dev/null @@ -1,454 +0,0 @@ -# Copyright 2022 The Matrix.org Foundation C.I.C. -# -# 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 typing -from typing import Dict, List, Sequence, Tuple -from unittest.mock import patch - -from parameterized import parameterized - -from twisted.internet.defer import Deferred, ensureDeferred -from twisted.test.proto_helpers import MemoryReactor - -from synapse.api.constants import EventTypes -from synapse.storage.databases.state.store import ( - MAX_INFLIGHT_REQUESTS_PER_GROUP, - state_filter_rough_priority_comparator, -) -from synapse.storage.state import StateFilter -from synapse.types import StateMap -from synapse.util import Clock - -from tests.unittest import HomeserverTestCase - -if typing.TYPE_CHECKING: - from synapse.server import HomeServer - -# StateFilter for ALL non-m.room.member state events -ALL_NON_MEMBERS_STATE_FILTER = StateFilter.freeze( - types={EventTypes.Member: set()}, - include_others=True, -) - -FAKE_STATE = { - (EventTypes.Member, "@alice:test"): "join", - (EventTypes.Member, "@bob:test"): "leave", - (EventTypes.Member, "@charlie:test"): "invite", - ("test.type", "a"): "AAA", - ("test.type", "b"): "BBB", - ("other.event.type", "state.key"): "123", -} - - -class StateGroupInflightCachingTestCase(HomeserverTestCase): - def prepare( - self, reactor: MemoryReactor, clock: Clock, homeserver: "HomeServer" - ) -> None: - self.state_storage = homeserver.get_storage().state - self.state_datastore = homeserver.get_datastores().state - # Patch out the `_get_state_groups_from_groups`. - # This is useful because it lets us pretend we have a slow database. - get_state_groups_patch = patch.object( - self.state_datastore, - "_get_state_groups_from_groups", - self._fake_get_state_groups_from_groups, - ) - get_state_groups_patch.start() - - self.addCleanup(get_state_groups_patch.stop) - self.get_state_group_calls: List[ - Tuple[Tuple[int, ...], StateFilter, Deferred[Dict[int, StateMap[str]]]] - ] = [] - - def _fake_get_state_groups_from_groups( - self, groups: Sequence[int], state_filter: StateFilter - ) -> "Deferred[Dict[int, StateMap[str]]]": - d: Deferred[Dict[int, StateMap[str]]] = Deferred() - self.get_state_group_calls.append((tuple(groups), state_filter, d)) - return d - - def _complete_request_fake( - self, - groups: Tuple[int, ...], - state_filter: StateFilter, - d: "Deferred[Dict[int, StateMap[str]]]", - ) -> None: - """ - Assemble a fake database response and complete the database request. - """ - - # Return a filtered copy of the fake state - d.callback({group: state_filter.filter_state(FAKE_STATE) for group in groups}) - - def test_duplicate_requests_deduplicated(self) -> None: - """ - Tests that duplicate requests for state are deduplicated. - - This test: - - requests some state (state group 42, 'all' state filter) - - requests it again, before the first request finishes - - checks to see that only one database query was made - - completes the database query - - checks that both requests see the same retrieved state - """ - req1 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.all() - ) - ) - self.pump(by=0.1) - - # This should have gone to the database - self.assertEqual(len(self.get_state_group_calls), 1) - self.assertFalse(req1.called) - - req2 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.all() - ) - ) - self.pump(by=0.1) - - # No more calls should have gone to the database - self.assertEqual(len(self.get_state_group_calls), 1) - self.assertFalse(req1.called) - self.assertFalse(req2.called) - - groups, sf, d = self.get_state_group_calls[0] - self.assertEqual(groups, (42,)) - self.assertEqual(sf, StateFilter.all()) - - # Now we can complete the request - self._complete_request_fake(groups, sf, d) - - self.assertEqual(self.get_success(req1), FAKE_STATE) - self.assertEqual(self.get_success(req2), FAKE_STATE) - - def test_smaller_request_deduplicated(self) -> None: - """ - Tests that duplicate requests for state are deduplicated. - - This test: - - requests some state (state group 42, 'all' state filter) - - requests a subset of that state, before the first request finishes - - checks to see that only one database query was made - - completes the database query - - checks that both requests see the correct retrieved state - """ - req1 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.from_types((("test.type", None),)) - ) - ) - self.pump(by=0.1) - - # This should have gone to the database - self.assertEqual(len(self.get_state_group_calls), 1) - self.assertFalse(req1.called) - - req2 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.from_types((("test.type", "b"),)) - ) - ) - self.pump(by=0.1) - - # No more calls should have gone to the database, because the second - # request was already in the in-flight cache! - self.assertEqual(len(self.get_state_group_calls), 1) - self.assertFalse(req1.called) - self.assertFalse(req2.called) - - groups, sf, d = self.get_state_group_calls[0] - self.assertEqual(groups, (42,)) - # The state filter is expanded internally for increased cache hit rate, - # so we the database sees a wider state filter than requested. - self.assertEqual(sf, ALL_NON_MEMBERS_STATE_FILTER) - - # Now we can complete the request - self._complete_request_fake(groups, sf, d) - - self.assertEqual( - self.get_success(req1), - {("test.type", "a"): "AAA", ("test.type", "b"): "BBB"}, - ) - self.assertEqual(self.get_success(req2), {("test.type", "b"): "BBB"}) - - def test_partially_overlapping_request_deduplicated(self) -> None: - """ - Tests that partially-overlapping requests are partially deduplicated. - - This test: - - requests a single type of wildcard state - (This is internally expanded to be all non-member state) - - requests the entire state in parallel - - checks to see that two database queries were made, but that the second - one is only for member state. - - completes the database queries - - checks that both requests have the correct result. - """ - - req1 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.from_types((("test.type", None),)) - ) - ) - self.pump(by=0.1) - - # This should have gone to the database - self.assertEqual(len(self.get_state_group_calls), 1) - self.assertFalse(req1.called) - - req2 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.all() - ) - ) - self.pump(by=0.1) - - # Because it only partially overlaps, this also went to the database - self.assertEqual(len(self.get_state_group_calls), 2) - self.assertFalse(req1.called) - self.assertFalse(req2.called) - - # First request: - groups, sf, d = self.get_state_group_calls[0] - self.assertEqual(groups, (42,)) - # The state filter is expanded internally for increased cache hit rate, - # so we the database sees a wider state filter than requested. - self.assertEqual(sf, ALL_NON_MEMBERS_STATE_FILTER) - self._complete_request_fake(groups, sf, d) - - # Second request: - groups, sf, d = self.get_state_group_calls[1] - self.assertEqual(groups, (42,)) - # The state filter is narrowed to only request membership state, because - # the remainder of the state is already being queried in the first request! - self.assertEqual( - sf, StateFilter.freeze({EventTypes.Member: None}, include_others=False) - ) - self._complete_request_fake(groups, sf, d) - - # Check the results are correct - self.assertEqual( - self.get_success(req1), - {("test.type", "a"): "AAA", ("test.type", "b"): "BBB"}, - ) - self.assertEqual(self.get_success(req2), FAKE_STATE) - - def test_in_flight_requests_stop_being_in_flight(self) -> None: - """ - Tests that in-flight request deduplication doesn't somehow 'hold on' - to completed requests: once they're done, they're taken out of the - in-flight cache. - """ - req1 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.all() - ) - ) - self.pump(by=0.1) - - # This should have gone to the database - self.assertEqual(len(self.get_state_group_calls), 1) - self.assertFalse(req1.called) - - # Complete the request right away. - self._complete_request_fake(*self.get_state_group_calls[0]) - self.assertTrue(req1.called) - - # Send off another request - req2 = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, StateFilter.all() - ) - ) - self.pump(by=0.1) - - # It should have gone to the database again, because the previous request - # isn't in-flight and therefore isn't available for deduplication. - self.assertEqual(len(self.get_state_group_calls), 2) - self.assertFalse(req2.called) - - # Complete the request right away. - self._complete_request_fake(*self.get_state_group_calls[1]) - self.assertTrue(req2.called) - groups, sf, d = self.get_state_group_calls[0] - - self.assertEqual(self.get_success(req1), FAKE_STATE) - self.assertEqual(self.get_success(req2), FAKE_STATE) - - def test_inflight_requests_capped(self) -> None: - """ - Tests that the number of in-flight requests is capped to 5. - - - requests several pieces of state separately - (5 to hit the limit, 1 to 'shunt out', another that comes after the - group has been 'shunted out') - - checks to see that the torrent of requests is shunted out by - rewriting one of the filters as the 'all' state filter - - requests after that one do not cause any additional queries - """ - # 5 at the time of writing. - CAP_COUNT = MAX_INFLIGHT_REQUESTS_PER_GROUP - - reqs = [] - - # Request 7 different keys (1 to 7) of the `some.state` type. - for req_id in range(CAP_COUNT + 2): - reqs.append( - ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, - StateFilter.freeze( - {"some.state": {str(req_id + 1)}}, include_others=False - ), - ) - ) - ) - self.pump(by=0.1) - - # There should only be 6 calls to the database, not 7. - self.assertEqual(len(self.get_state_group_calls), CAP_COUNT + 1) - - # Assert that the first 5 are exact requests for the individual pieces - # wanted - for req_id in range(CAP_COUNT): - groups, sf, d = self.get_state_group_calls[req_id] - self.assertEqual( - sf, - StateFilter.freeze( - {"some.state": {str(req_id + 1)}}, include_others=False - ), - ) - - # The 6th request should be the 'all' state filter - groups, sf, d = self.get_state_group_calls[CAP_COUNT] - self.assertEqual(sf, StateFilter.all()) - - # Complete the queries and check which requests complete as a result - for req_id in range(CAP_COUNT): - # This request should not have been completed yet - self.assertFalse(reqs[req_id].called) - - groups, sf, d = self.get_state_group_calls[req_id] - self._complete_request_fake(groups, sf, d) - - # This should have only completed this one request - self.assertTrue(reqs[req_id].called) - - # Now complete the final query; the last 2 requests should complete - # as a result - self.assertFalse(reqs[CAP_COUNT].called) - self.assertFalse(reqs[CAP_COUNT + 1].called) - groups, sf, d = self.get_state_group_calls[CAP_COUNT] - self._complete_request_fake(groups, sf, d) - self.assertTrue(reqs[CAP_COUNT].called) - self.assertTrue(reqs[CAP_COUNT + 1].called) - - @parameterized.expand([(False,), (True,)]) - def test_ordering_of_request_reuse(self, reverse: bool) -> None: - """ - Tests that 'larger' in-flight requests are ordered first. - - This is mostly a design decision in order to prevent a request from - hanging on to multiple queries when it would have been sufficient to - hang on to only one bigger query. - - The 'size' of a state filter is a rough heuristic. - - - requests two pieces of state, one 'larger' than the other, but each - spawning a query - - requests a third piece of state - - completes the larger of the first two queries - - checks that the third request gets completed (and doesn't needlessly - wait for the other query) - - Parameters: - reverse: whether to reverse the order of the initial requests, to ensure - that the effect doesn't depend on the order of request submission. - """ - - # We add in an extra state type to make sure that both requests spawn - # queries which are not optimised out. - state_filters = [ - StateFilter.freeze( - {"state.type": {"A"}, "other.state.type": {"a"}}, include_others=False - ), - StateFilter.freeze( - { - "state.type": None, - "other.state.type": {"b"}, - # The current rough size comparator uses the number of state types - # as an indicator of size. - # To influence it to make this state filter bigger than the previous one, - # we add another dummy state type. - "extra.state.type": {"c"}, - }, - include_others=False, - ), - ] - - if reverse: - # For fairness, we perform one test run with the list reversed. - state_filters.reverse() - smallest_state_filter_idx = 1 - biggest_state_filter_idx = 0 - else: - smallest_state_filter_idx = 0 - biggest_state_filter_idx = 1 - - # This assertion is for our own sanity more than anything else. - self.assertLess( - state_filter_rough_priority_comparator( - state_filters[biggest_state_filter_idx] - ), - state_filter_rough_priority_comparator( - state_filters[smallest_state_filter_idx] - ), - "Test invalid: bigger state filter is not actually bigger.", - ) - - # Spawn the initial two requests - for state_filter in state_filters: - ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, - state_filter, - ) - ) - - # Spawn a third request - req = ensureDeferred( - self.state_datastore._get_state_for_group_using_inflight_cache( - 42, - StateFilter.freeze( - { - "state.type": {"A"}, - }, - include_others=False, - ), - ) - ) - self.pump(by=0.1) - - self.assertFalse(req.called) - - # Complete the largest request's query to make sure that the final request - # only waits for that one (and doesn't needlessly wait for both queries) - self._complete_request_fake( - *self.get_state_group_calls[biggest_state_filter_idx] - ) - - # That should have been sufficient to complete the third request - self.assertTrue(req.called) |