487 lines
19 KiB
Python
487 lines
19 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, List, Tuple
|
|
from unittest import mock
|
|
|
|
from twisted.enterprise.adbapi import ConnectionPool
|
|
from twisted.internet.defer import CancelledError, Deferred, ensureDeferred
|
|
from twisted.test.proto_helpers import MemoryReactor
|
|
|
|
from synapse.api.room_versions import EventFormatVersions, RoomVersions
|
|
from synapse.events import make_event_from_dict
|
|
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
|
|
from tests.test_utils.event_injection import create_event, inject_event
|
|
|
|
|
|
class HaveSeenEventsTestCase(unittest.HomeserverTestCase):
|
|
servlets = [
|
|
admin.register_servlets,
|
|
room.register_servlets,
|
|
login.register_servlets,
|
|
]
|
|
|
|
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
|
|
self.hs = hs
|
|
self.store: EventsWorkerStore = hs.get_datastores().main
|
|
|
|
self.user = self.register_user("user", "pass")
|
|
self.token = self.login(self.user, "pass")
|
|
self.room_id = self.helper.create_room_as(self.user, tok=self.token)
|
|
|
|
self.event_ids: List[str] = []
|
|
for i in range(3):
|
|
event = self.get_success(
|
|
inject_event(
|
|
hs,
|
|
room_version=RoomVersions.V7.identifier,
|
|
room_id=self.room_id,
|
|
sender=self.user,
|
|
type="test_event_type",
|
|
content={"body": f"foobarbaz{i}"},
|
|
)
|
|
)
|
|
|
|
self.event_ids.append(event.event_id)
|
|
|
|
def test_simple(self) -> None:
|
|
with LoggingContext(name="test") as ctx:
|
|
res = self.get_success(
|
|
self.store.have_seen_events(
|
|
self.room_id, [self.event_ids[0], "eventdoesnotexist"]
|
|
)
|
|
)
|
|
self.assertEqual(res, {self.event_ids[0]})
|
|
|
|
# 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(
|
|
self.room_id, [self.event_ids[0], "eventdoesnotexist"]
|
|
)
|
|
)
|
|
self.assertEqual(res, {self.event_ids[0]})
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 0)
|
|
|
|
def test_persisting_event_invalidates_cache(self) -> None:
|
|
"""
|
|
Test to make sure that the `have_seen_event` cache
|
|
is invalidated after we persist an event and returns
|
|
the updated value.
|
|
"""
|
|
event, event_context = self.get_success(
|
|
create_event(
|
|
self.hs,
|
|
room_id=self.room_id,
|
|
sender=self.user,
|
|
type="test_event_type",
|
|
content={"body": "garply"},
|
|
)
|
|
)
|
|
|
|
with LoggingContext(name="test") as ctx:
|
|
# First, check `have_seen_event` for an event we have not seen yet
|
|
# to prime the cache with a `false` value.
|
|
res = self.get_success(
|
|
self.store.have_seen_events(event.room_id, [event.event_id])
|
|
)
|
|
self.assertEqual(res, set())
|
|
|
|
# That should result in a single db query to lookup
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 1)
|
|
|
|
# Persist the event which should invalidate or prefill the
|
|
# `have_seen_event` cache so we don't return stale values.
|
|
persistence = self.hs.get_storage_controllers().persistence
|
|
assert persistence is not None
|
|
self.get_success(
|
|
persistence.persist_event(
|
|
event,
|
|
event_context,
|
|
)
|
|
)
|
|
|
|
with LoggingContext(name="test") as ctx:
|
|
# Check `have_seen_event` again and we should see the updated fact
|
|
# that we have now seen the event after persisting it.
|
|
res = self.get_success(
|
|
self.store.have_seen_events(event.room_id, [event.event_id])
|
|
)
|
|
self.assertEqual(res, {event.event_id})
|
|
|
|
# That should result in a single db query to lookup
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 1)
|
|
|
|
def test_invalidate_cache_by_room_id(self) -> None:
|
|
"""
|
|
Test to make sure that all events associated with the given `(room_id,)`
|
|
are invalidated in the `have_seen_event` cache.
|
|
"""
|
|
with LoggingContext(name="test") as ctx:
|
|
# Prime the cache with some values
|
|
res = self.get_success(
|
|
self.store.have_seen_events(self.room_id, self.event_ids)
|
|
)
|
|
self.assertEqual(res, set(self.event_ids))
|
|
|
|
# That should result in a single db query to lookup
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 1)
|
|
|
|
# Clear the cache with any events associated with the `room_id`
|
|
self.store.have_seen_event.invalidate((self.room_id,))
|
|
|
|
with LoggingContext(name="test") as ctx:
|
|
res = self.get_success(
|
|
self.store.have_seen_events(self.room_id, self.event_ids)
|
|
)
|
|
self.assertEqual(res, set(self.event_ids))
|
|
|
|
# Since we cleared the cache, it should result in another db query to lookup
|
|
self.assertEqual(ctx.get_resource_usage().db_txn_count, 1)
|
|
|
|
|
|
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: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
|
|
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.get_success(self.store._get_event_cache.clear())
|
|
|
|
def test_simple(self) -> None:
|
|
"""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_event_ref(self) -> None:
|
|
"""Test that we reuse events that are still in memory but have fallen
|
|
out of the cache, rather than requesting them from the DB.
|
|
"""
|
|
|
|
# Reset the event cache
|
|
self.get_success(self.store._get_event_cache.clear())
|
|
|
|
with LoggingContext("test") as ctx:
|
|
# We keep hold of the event event though we never use it.
|
|
event = self.get_success(self.store.get_event(self.event_id)) # noqa: F841
|
|
|
|
# We should have fetched the event from the DB
|
|
self.assertEqual(ctx.get_resource_usage().evt_db_fetch_count, 1)
|
|
|
|
# Reset the event cache
|
|
self.get_success(self.store._get_event_cache.clear())
|
|
|
|
with LoggingContext("test") as ctx:
|
|
self.get_success(self.store.get_event(self.event_id))
|
|
|
|
# Since the event is still in memory we shouldn't have fetched it
|
|
# from the DB
|
|
self.assertEqual(ctx.get_resource_usage().evt_db_fetch_count, 0)
|
|
|
|
def test_dedupe(self) -> None:
|
|
"""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) -> None:
|
|
self.store: EventsWorkerStore = hs.get_datastores().main
|
|
|
|
self.room_id = f"!room:{hs.hostname}"
|
|
|
|
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: List[str] = []
|
|
for idx in range(20):
|
|
event_json = {
|
|
"type": f"test {idx}",
|
|
"room_id": self.room_id,
|
|
}
|
|
event = make_event_from_dict(event_json, room_version=RoomVersions.V4)
|
|
event_id = event.event_id
|
|
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": event.type,
|
|
"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(event_json),
|
|
"internal_metadata": "{}",
|
|
"format_version": EventFormatVersions.ROOM_V4_PLUS,
|
|
},
|
|
)
|
|
)
|
|
self.event_ids.append(event_id)
|
|
|
|
@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]))
|
|
|
|
|
|
class GetEventCancellationTestCase(unittest.HomeserverTestCase):
|
|
"""Test cancellation of `get_event` calls."""
|
|
|
|
servlets = [
|
|
admin.register_servlets,
|
|
room.register_servlets,
|
|
login.register_servlets,
|
|
]
|
|
|
|
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
|
|
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.get_success(self.store._get_event_cache.clear())
|
|
|
|
@contextmanager
|
|
def blocking_get_event_calls(
|
|
self,
|
|
) -> Generator[
|
|
Tuple["Deferred[None]", "Deferred[None]", "Deferred[None]"], None, None
|
|
]:
|
|
"""Starts two concurrent `get_event` calls for the same event.
|
|
|
|
Both `get_event` calls will use the same database fetch, which will be blocked
|
|
at the time this function returns.
|
|
|
|
Returns:
|
|
A tuple containing:
|
|
* A `Deferred` that unblocks the database fetch.
|
|
* A cancellable `Deferred` for the first `get_event` call.
|
|
* A cancellable `Deferred` for the second `get_event` call.
|
|
"""
|
|
# Patch `DatabasePool.runWithConnection` to block.
|
|
unblock: "Deferred[None]" = Deferred()
|
|
original_runWithConnection = self.store.db_pool.runWithConnection
|
|
|
|
# Don't bother with the types here, we just pass into the original function.
|
|
async def runWithConnection(*args, **kwargs): # type: ignore[no-untyped-def]
|
|
await unblock
|
|
return await original_runWithConnection(*args, **kwargs)
|
|
|
|
with mock.patch.object(
|
|
self.store.db_pool,
|
|
"runWithConnection",
|
|
new=runWithConnection,
|
|
):
|
|
ctx1 = LoggingContext("get_event1")
|
|
ctx2 = LoggingContext("get_event2")
|
|
|
|
async def get_event(ctx: LoggingContext) -> None:
|
|
with ctx:
|
|
await self.store.get_event(self.event_id)
|
|
|
|
get_event1 = ensureDeferred(get_event(ctx1))
|
|
get_event2 = ensureDeferred(get_event(ctx2))
|
|
|
|
# Both `get_event` calls ought to be blocked.
|
|
self.assertNoResult(get_event1)
|
|
self.assertNoResult(get_event2)
|
|
|
|
yield unblock, get_event1, get_event2
|
|
|
|
# Confirm that the two `get_event` calls shared the same database fetch.
|
|
self.assertEqual(ctx1.get_resource_usage().evt_db_fetch_count, 1)
|
|
self.assertEqual(ctx2.get_resource_usage().evt_db_fetch_count, 0)
|
|
|
|
def test_first_get_event_cancelled(self) -> None:
|
|
"""Test cancellation of the first `get_event` call sharing a database fetch.
|
|
|
|
The first `get_event` call is the one which initiates the fetch. We expect the
|
|
fetch to complete despite the cancellation. Furthermore, the first `get_event`
|
|
call must not abort before the fetch is complete, otherwise the fetch will be
|
|
using a finished logging context.
|
|
"""
|
|
with self.blocking_get_event_calls() as (unblock, get_event1, get_event2):
|
|
# Cancel the first `get_event` call.
|
|
get_event1.cancel()
|
|
# The first `get_event` call must not abort immediately, otherwise its
|
|
# logging context will be finished while it is still in use by the database
|
|
# fetch.
|
|
self.assertNoResult(get_event1)
|
|
# The second `get_event` call must not be cancelled.
|
|
self.assertNoResult(get_event2)
|
|
|
|
# Unblock the database fetch.
|
|
unblock.callback(None)
|
|
# A `CancelledError` should be raised out of the first `get_event` call.
|
|
exc = self.get_failure(get_event1, CancelledError).value
|
|
self.assertIsInstance(exc, CancelledError)
|
|
# The second `get_event` call should complete successfully.
|
|
self.get_success(get_event2)
|
|
|
|
def test_second_get_event_cancelled(self) -> None:
|
|
"""Test cancellation of the second `get_event` call sharing a database fetch."""
|
|
with self.blocking_get_event_calls() as (unblock, get_event1, get_event2):
|
|
# Cancel the second `get_event` call.
|
|
get_event2.cancel()
|
|
# The first `get_event` call must not be cancelled.
|
|
self.assertNoResult(get_event1)
|
|
# The second `get_event` call gets cancelled immediately.
|
|
exc = self.get_failure(get_event2, CancelledError).value
|
|
self.assertIsInstance(exc, CancelledError)
|
|
|
|
# Unblock the database fetch.
|
|
unblock.callback(None)
|
|
# The first `get_event` call should complete successfully.
|
|
self.get_success(get_event1)
|