284 lines
10 KiB
Python
284 lines
10 KiB
Python
# Copyright 2021 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 json
|
|
from contextlib import contextmanager
|
|
from typing import Generator
|
|
|
|
from twisted.enterprise.adbapi import ConnectionPool
|
|
from twisted.internet.defer import ensureDeferred
|
|
from twisted.test.proto_helpers import MemoryReactor
|
|
|
|
from synapse.api.room_versions import EventFormatVersions, RoomVersions
|
|
from synapse.logging.context import LoggingContext
|
|
from synapse.rest import admin
|
|
from synapse.rest.client import login, room
|
|
from synapse.server import HomeServer
|
|
from synapse.storage.databases.main.events_worker import (
|
|
EVENT_QUEUE_THREADS,
|
|
EventsWorkerStore,
|
|
)
|
|
from synapse.storage.types import Connection
|
|
from synapse.util import Clock
|
|
from synapse.util.async_helpers import yieldable_gather_results
|
|
|
|
from tests import unittest
|
|
|
|
|
|
class HaveSeenEventsTestCase(unittest.HomeserverTestCase):
|
|
def prepare(self, reactor, clock, hs):
|
|
self.store: EventsWorkerStore = hs.get_datastores().main
|
|
|
|
# insert some test data
|
|
for rid in ("room1", "room2"):
|
|
self.get_success(
|
|
self.store.db_pool.simple_insert(
|
|
"rooms",
|
|
{"room_id": rid, "room_version": 4},
|
|
)
|
|
)
|
|
|
|
for idx, (rid, eid) in enumerate(
|
|
(
|
|
("room1", "event10"),
|
|
("room1", "event11"),
|
|
("room1", "event12"),
|
|
("room2", "event20"),
|
|
)
|
|
):
|
|
self.get_success(
|
|
self.store.db_pool.simple_insert(
|
|
"events",
|
|
{
|
|
"event_id": eid,
|
|
"room_id": rid,
|
|
"topological_ordering": idx,
|
|
"stream_ordering": idx,
|
|
"type": "test",
|
|
"processed": True,
|
|
"outlier": False,
|
|
},
|
|
)
|
|
)
|
|
self.get_success(
|
|
self.store.db_pool.simple_insert(
|
|
"event_json",
|
|
{
|
|
"event_id": eid,
|
|
"room_id": rid,
|
|
"json": json.dumps({"type": "test", "room_id": rid}),
|
|
"internal_metadata": "{}",
|
|
"format_version": 3,
|
|
},
|
|
)
|
|
)
|
|
|
|
def test_simple(self):
|
|
with LoggingContext(name="test") as ctx:
|
|
res = self.get_success(
|
|
self.store.have_seen_events("room1", ["event10", "event19"])
|
|
)
|
|
self.assertEqual(res, {"event10"})
|
|
|
|
# that should result in a single db query
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 1)
|
|
|
|
# a second lookup of the same events should cause no queries
|
|
with LoggingContext(name="test") as ctx:
|
|
res = self.get_success(
|
|
self.store.have_seen_events("room1", ["event10", "event19"])
|
|
)
|
|
self.assertEqual(res, {"event10"})
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 0)
|
|
|
|
def test_query_via_event_cache(self):
|
|
# fetch an event into the event cache
|
|
self.get_success(self.store.get_event("event10"))
|
|
|
|
# looking it up should now cause no db hits
|
|
with LoggingContext(name="test") as ctx:
|
|
res = self.get_success(self.store.have_seen_events("room1", ["event10"]))
|
|
self.assertEqual(res, {"event10"})
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 0)
|
|
|
|
|
|
class EventCacheTestCase(unittest.HomeserverTestCase):
|
|
"""Test that the various layers of event cache works."""
|
|
|
|
servlets = [
|
|
admin.register_servlets,
|
|
room.register_servlets,
|
|
login.register_servlets,
|
|
]
|
|
|
|
def prepare(self, reactor, clock, hs):
|
|
self.store: EventsWorkerStore = hs.get_datastores().main
|
|
|
|
self.user = self.register_user("user", "pass")
|
|
self.token = self.login(self.user, "pass")
|
|
|
|
self.room = self.helper.create_room_as(self.user, tok=self.token)
|
|
|
|
res = self.helper.send(self.room, tok=self.token)
|
|
self.event_id = res["event_id"]
|
|
|
|
# Reset the event cache so the tests start with it empty
|
|
self.store._get_event_cache.clear()
|
|
|
|
def test_simple(self):
|
|
"""Test that we cache events that we pull from the DB."""
|
|
|
|
with LoggingContext("test") as ctx:
|
|
self.get_success(self.store.get_event(self.event_id))
|
|
|
|
# We should have fetched the event from the DB
|
|
self.assertEqual(ctx.get_resource_usage().evt_db_fetch_count, 1)
|
|
|
|
def test_dedupe(self):
|
|
"""Test that if we request the same event multiple times we only pull it
|
|
out once.
|
|
"""
|
|
|
|
with LoggingContext("test") as ctx:
|
|
d = yieldable_gather_results(
|
|
self.store.get_event, [self.event_id, self.event_id]
|
|
)
|
|
self.get_success(d)
|
|
|
|
# We should have fetched the event from the DB
|
|
self.assertEqual(ctx.get_resource_usage().evt_db_fetch_count, 1)
|
|
|
|
|
|
class DatabaseOutageTestCase(unittest.HomeserverTestCase):
|
|
"""Test event fetching during a database outage."""
|
|
|
|
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer):
|
|
self.store: EventsWorkerStore = hs.get_datastores().main
|
|
|
|
self.room_id = f"!room:{hs.hostname}"
|
|
self.event_ids = [f"event{i}" for i in range(20)]
|
|
|
|
self._populate_events()
|
|
|
|
def _populate_events(self) -> None:
|
|
"""Ensure that there are test events in the database.
|
|
|
|
When testing with the in-memory SQLite database, all the events are lost during
|
|
the simulated outage.
|
|
|
|
To ensure consistency between `room_id`s and `event_id`s before and after the
|
|
outage, rows are built and inserted manually.
|
|
|
|
Upserts are used to handle the non-SQLite case where events are not lost.
|
|
"""
|
|
self.get_success(
|
|
self.store.db_pool.simple_upsert(
|
|
"rooms",
|
|
{"room_id": self.room_id},
|
|
{"room_version": RoomVersions.V4.identifier},
|
|
)
|
|
)
|
|
|
|
self.event_ids = [f"event{i}" for i in range(20)]
|
|
for idx, event_id in enumerate(self.event_ids):
|
|
self.get_success(
|
|
self.store.db_pool.simple_upsert(
|
|
"events",
|
|
{"event_id": event_id},
|
|
{
|
|
"event_id": event_id,
|
|
"room_id": self.room_id,
|
|
"topological_ordering": idx,
|
|
"stream_ordering": idx,
|
|
"type": "test",
|
|
"processed": True,
|
|
"outlier": False,
|
|
},
|
|
)
|
|
)
|
|
self.get_success(
|
|
self.store.db_pool.simple_upsert(
|
|
"event_json",
|
|
{"event_id": event_id},
|
|
{
|
|
"room_id": self.room_id,
|
|
"json": json.dumps({"type": "test", "room_id": self.room_id}),
|
|
"internal_metadata": "{}",
|
|
"format_version": EventFormatVersions.V3,
|
|
},
|
|
)
|
|
)
|
|
|
|
@contextmanager
|
|
def _outage(self) -> Generator[None, None, None]:
|
|
"""Simulate a database outage.
|
|
|
|
Returns:
|
|
A context manager. While the context is active, any attempts to connect to
|
|
the database will fail.
|
|
"""
|
|
connection_pool = self.store.db_pool._db_pool
|
|
|
|
# Close all connections and shut down the database `ThreadPool`.
|
|
connection_pool.close()
|
|
|
|
# Restart the database `ThreadPool`.
|
|
connection_pool.start()
|
|
|
|
original_connection_factory = connection_pool.connectionFactory
|
|
|
|
def connection_factory(_pool: ConnectionPool) -> Connection:
|
|
raise Exception("Could not connect to the database.")
|
|
|
|
connection_pool.connectionFactory = connection_factory # type: ignore[assignment]
|
|
try:
|
|
yield
|
|
finally:
|
|
connection_pool.connectionFactory = original_connection_factory
|
|
|
|
# If the in-memory SQLite database is being used, all the events are gone.
|
|
# Restore the test data.
|
|
self._populate_events()
|
|
|
|
def test_failure(self) -> None:
|
|
"""Test that event fetches do not get stuck during a database outage."""
|
|
with self._outage():
|
|
failure = self.get_failure(
|
|
self.store.get_event(self.event_ids[0]), Exception
|
|
)
|
|
self.assertEqual(str(failure.value), "Could not connect to the database.")
|
|
|
|
def test_recovery(self) -> None:
|
|
"""Test that event fetchers recover after a database outage."""
|
|
with self._outage():
|
|
# Kick off a bunch of event fetches but do not pump the reactor
|
|
event_deferreds = []
|
|
for event_id in self.event_ids:
|
|
event_deferreds.append(ensureDeferred(self.store.get_event(event_id)))
|
|
|
|
# We should have maxed out on event fetcher threads
|
|
self.assertEqual(self.store._event_fetch_ongoing, EVENT_QUEUE_THREADS)
|
|
|
|
# All the event fetchers will fail
|
|
self.pump()
|
|
self.assertEqual(self.store._event_fetch_ongoing, 0)
|
|
|
|
for event_deferred in event_deferreds:
|
|
failure = self.get_failure(event_deferred, Exception)
|
|
self.assertEqual(
|
|
str(failure.value), "Could not connect to the database."
|
|
)
|
|
|
|
# This next event fetch should succeed
|
|
self.get_success(self.store.get_event(self.event_ids[0]))
|