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https://mau.dev/maunium/synapse.git
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8f35f8148e
* Fix bug where a new writer advances their token too quickly When starting a new writer (for e.g. persisting events), the `MultiWriterIdGenerator` doesn't have a minimum token for it as there are no rows matching that new writer in the DB. This results in the the first stream ID it acquired being announced as persisted *before* it actually finishes persisting, if another writer gets and persists a subsequent stream ID. This is due to the logic of setting the minimum persisted position to the minimum known position of across all writers, and the new writer starts off not being considered. * Fix sending out POSITIONs when our token advances without update Broke in #14820 * For replication HTTP requests, only wait for minimal position
945 lines
37 KiB
Python
945 lines
37 KiB
Python
# Copyright 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import List, Optional
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from twisted.test.proto_helpers import MemoryReactor
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from synapse.server import HomeServer
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from synapse.storage.database import (
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DatabasePool,
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LoggingDatabaseConnection,
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LoggingTransaction,
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)
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from synapse.storage.engines import IncorrectDatabaseSetup
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from synapse.storage.types import Cursor
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from synapse.storage.util.id_generators import MultiWriterIdGenerator, StreamIdGenerator
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from synapse.util import Clock
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from tests.unittest import HomeserverTestCase
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from tests.utils import USE_POSTGRES_FOR_TESTS
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class StreamIdGeneratorTestCase(HomeserverTestCase):
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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self.store = hs.get_datastores().main
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self.db_pool: DatabasePool = self.store.db_pool
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self.get_success(self.db_pool.runInteraction("_setup_db", self._setup_db))
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def _setup_db(self, txn: LoggingTransaction) -> None:
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txn.execute(
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"""
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CREATE TABLE foobar (
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stream_id BIGINT NOT NULL,
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data TEXT
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);
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"""
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)
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txn.execute("INSERT INTO foobar VALUES (123, 'hello world');")
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def _create_id_generator(self) -> StreamIdGenerator:
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def _create(conn: LoggingDatabaseConnection) -> StreamIdGenerator:
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return StreamIdGenerator(
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db_conn=conn,
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notifier=self.hs.get_replication_notifier(),
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table="foobar",
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column="stream_id",
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)
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return self.get_success_or_raise(self.db_pool.runWithConnection(_create))
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def test_initial_value(self) -> None:
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"""Check that we read the current token from the DB."""
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id_gen = self._create_id_generator()
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self.assertEqual(id_gen.get_current_token(), 123)
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def test_single_gen_next(self) -> None:
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"""Check that we correctly increment the current token from the DB."""
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id_gen = self._create_id_generator()
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async def test_gen_next() -> None:
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async with id_gen.get_next() as next_id:
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# We haven't persisted `next_id` yet; current token is still 123
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self.assertEqual(id_gen.get_current_token(), 123)
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# But we did learn what the next value is
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self.assertEqual(next_id, 124)
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# Once the context manager closes we assume that the `next_id` has been
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# written to the DB.
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self.assertEqual(id_gen.get_current_token(), 124)
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self.get_success(test_gen_next())
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def test_multiple_gen_nexts(self) -> None:
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"""Check that we handle overlapping calls to gen_next sensibly."""
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id_gen = self._create_id_generator()
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async def test_gen_next() -> None:
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ctx1 = id_gen.get_next()
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ctx2 = id_gen.get_next()
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ctx3 = id_gen.get_next()
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# Request three new stream IDs.
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self.assertEqual(await ctx1.__aenter__(), 124)
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self.assertEqual(await ctx2.__aenter__(), 125)
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self.assertEqual(await ctx3.__aenter__(), 126)
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# None are persisted: current token unchanged.
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self.assertEqual(id_gen.get_current_token(), 123)
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# Persist each in turn.
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await ctx1.__aexit__(None, None, None)
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self.assertEqual(id_gen.get_current_token(), 124)
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await ctx2.__aexit__(None, None, None)
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self.assertEqual(id_gen.get_current_token(), 125)
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await ctx3.__aexit__(None, None, None)
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self.assertEqual(id_gen.get_current_token(), 126)
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self.get_success(test_gen_next())
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def test_multiple_gen_nexts_closed_in_different_order(self) -> None:
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"""Check that we handle overlapping calls to gen_next, even when their IDs
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created and persisted in different orders."""
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id_gen = self._create_id_generator()
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async def test_gen_next() -> None:
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ctx1 = id_gen.get_next()
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ctx2 = id_gen.get_next()
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ctx3 = id_gen.get_next()
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# Request three new stream IDs.
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self.assertEqual(await ctx1.__aenter__(), 124)
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self.assertEqual(await ctx2.__aenter__(), 125)
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self.assertEqual(await ctx3.__aenter__(), 126)
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# None are persisted: current token unchanged.
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self.assertEqual(id_gen.get_current_token(), 123)
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# Persist them in a different order, starting with 126 from ctx3.
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await ctx3.__aexit__(None, None, None)
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# We haven't persisted 124 from ctx1 yet---current token is still 123.
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self.assertEqual(id_gen.get_current_token(), 123)
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# Now persist 124 from ctx1.
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await ctx1.__aexit__(None, None, None)
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# Current token is then 124, waiting for 125 to be persisted.
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self.assertEqual(id_gen.get_current_token(), 124)
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# Finally persist 125 from ctx2.
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await ctx2.__aexit__(None, None, None)
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# Current token is then 126 (skipping over 125).
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self.assertEqual(id_gen.get_current_token(), 126)
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self.get_success(test_gen_next())
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def test_gen_next_while_still_waiting_for_persistence(self) -> None:
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"""Check that we handle overlapping calls to gen_next."""
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id_gen = self._create_id_generator()
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async def test_gen_next() -> None:
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ctx1 = id_gen.get_next()
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ctx2 = id_gen.get_next()
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ctx3 = id_gen.get_next()
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# Request two new stream IDs.
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self.assertEqual(await ctx1.__aenter__(), 124)
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self.assertEqual(await ctx2.__aenter__(), 125)
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# Persist ctx2 first.
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await ctx2.__aexit__(None, None, None)
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# Still waiting on ctx1's ID to be persisted.
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self.assertEqual(id_gen.get_current_token(), 123)
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# Now request a third stream ID. It should be 126 (the smallest ID that
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# we've not yet handed out.)
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self.assertEqual(await ctx3.__aenter__(), 126)
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self.get_success(test_gen_next())
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class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
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if not USE_POSTGRES_FOR_TESTS:
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skip = "Requires Postgres"
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def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
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self.store = hs.get_datastores().main
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self.db_pool: DatabasePool = self.store.db_pool
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self.get_success(self.db_pool.runInteraction("_setup_db", self._setup_db))
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def _setup_db(self, txn: LoggingTransaction) -> None:
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txn.execute("CREATE SEQUENCE foobar_seq")
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txn.execute(
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"""
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CREATE TABLE foobar (
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stream_id BIGINT NOT NULL,
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instance_name TEXT NOT NULL,
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data TEXT
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);
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"""
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)
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def _create_id_generator(
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self, instance_name: str = "master", writers: Optional[List[str]] = None
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) -> MultiWriterIdGenerator:
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def _create(conn: LoggingDatabaseConnection) -> MultiWriterIdGenerator:
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return MultiWriterIdGenerator(
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conn,
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self.db_pool,
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notifier=self.hs.get_replication_notifier(),
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stream_name="test_stream",
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instance_name=instance_name,
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tables=[("foobar", "instance_name", "stream_id")],
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sequence_name="foobar_seq",
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writers=writers or ["master"],
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)
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return self.get_success_or_raise(self.db_pool.runWithConnection(_create))
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def _insert_rows(self, instance_name: str, number: int) -> None:
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"""Insert N rows as the given instance, inserting with stream IDs pulled
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from the postgres sequence.
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"""
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def _insert(txn: LoggingTransaction) -> None:
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for _ in range(number):
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txn.execute(
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"INSERT INTO foobar VALUES (nextval('foobar_seq'), ?)",
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(instance_name,),
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)
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txn.execute(
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"""
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INSERT INTO stream_positions VALUES ('test_stream', ?, lastval())
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ON CONFLICT (stream_name, instance_name) DO UPDATE SET stream_id = lastval()
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""",
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(instance_name,),
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)
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self.get_success(self.db_pool.runInteraction("_insert_rows", _insert))
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def _insert_row_with_id(self, instance_name: str, stream_id: int) -> None:
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"""Insert one row as the given instance with given stream_id, updating
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the postgres sequence position to match.
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"""
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def _insert(txn: LoggingTransaction) -> None:
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txn.execute(
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"INSERT INTO foobar VALUES (?, ?)",
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(
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stream_id,
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instance_name,
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),
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)
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txn.execute("SELECT setval('foobar_seq', ?)", (stream_id,))
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txn.execute(
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"""
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INSERT INTO stream_positions VALUES ('test_stream', ?, ?)
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ON CONFLICT (stream_name, instance_name) DO UPDATE SET stream_id = ?
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""",
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(instance_name, stream_id, stream_id),
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)
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self.get_success(self.db_pool.runInteraction("_insert_row_with_id", _insert))
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def test_empty(self) -> None:
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"""Test an ID generator against an empty database gives sensible
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current positions.
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"""
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id_gen = self._create_id_generator()
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# The table is empty so we expect the map for positions to have a dummy
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# minimum value.
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self.assertEqual(id_gen.get_positions(), {"master": 1})
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def test_single_instance(self) -> None:
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"""Test that reads and writes from a single process are handled
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correctly.
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"""
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# Prefill table with 7 rows written by 'master'
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self._insert_rows("master", 7)
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id_gen = self._create_id_generator()
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self.assertEqual(id_gen.get_positions(), {"master": 7})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
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# Try allocating a new ID gen and check that we only see position
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# advanced after we leave the context manager.
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async def _get_next_async() -> None:
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async with id_gen.get_next() as stream_id:
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self.assertEqual(stream_id, 8)
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self.assertEqual(id_gen.get_positions(), {"master": 7})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
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self.get_success(_get_next_async())
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self.assertEqual(id_gen.get_positions(), {"master": 8})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 8)
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def test_out_of_order_finish(self) -> None:
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"""Test that IDs persisted out of order are correctly handled"""
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# Prefill table with 7 rows written by 'master'
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self._insert_rows("master", 7)
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id_gen = self._create_id_generator()
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self.assertEqual(id_gen.get_positions(), {"master": 7})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
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ctx1 = id_gen.get_next()
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ctx2 = id_gen.get_next()
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ctx3 = id_gen.get_next()
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ctx4 = id_gen.get_next()
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s1 = self.get_success(ctx1.__aenter__())
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s2 = self.get_success(ctx2.__aenter__())
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s3 = self.get_success(ctx3.__aenter__())
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s4 = self.get_success(ctx4.__aenter__())
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self.assertEqual(s1, 8)
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self.assertEqual(s2, 9)
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self.assertEqual(s3, 10)
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self.assertEqual(s4, 11)
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self.assertEqual(id_gen.get_positions(), {"master": 7})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
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self.get_success(ctx2.__aexit__(None, None, None))
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self.assertEqual(id_gen.get_positions(), {"master": 7})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
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self.get_success(ctx1.__aexit__(None, None, None))
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self.assertEqual(id_gen.get_positions(), {"master": 9})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 9)
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self.get_success(ctx4.__aexit__(None, None, None))
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self.assertEqual(id_gen.get_positions(), {"master": 9})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 9)
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self.get_success(ctx3.__aexit__(None, None, None))
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self.assertEqual(id_gen.get_positions(), {"master": 11})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 11)
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def test_multi_instance(self) -> None:
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"""Test that reads and writes from multiple processes are handled
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correctly.
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"""
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self._insert_rows("first", 3)
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self._insert_rows("second", 4)
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first_id_gen = self._create_id_generator("first", writers=["first", "second"])
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second_id_gen = self._create_id_generator("second", writers=["first", "second"])
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self.assertEqual(first_id_gen.get_positions(), {"first": 3, "second": 7})
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self.assertEqual(first_id_gen.get_current_token_for_writer("first"), 7)
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self.assertEqual(first_id_gen.get_current_token_for_writer("second"), 7)
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self.assertEqual(second_id_gen.get_positions(), {"first": 3, "second": 7})
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self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 7)
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self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 7)
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# Try allocating a new ID gen and check that we only see position
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# advanced after we leave the context manager.
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async def _get_next_async() -> None:
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async with first_id_gen.get_next() as stream_id:
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self.assertEqual(stream_id, 8)
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self.assertEqual(
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first_id_gen.get_positions(), {"first": 3, "second": 7}
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)
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self.assertEqual(first_id_gen.get_persisted_upto_position(), 7)
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self.get_success(_get_next_async())
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self.assertEqual(first_id_gen.get_positions(), {"first": 8, "second": 7})
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# However the ID gen on the second instance won't have seen the update
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self.assertEqual(second_id_gen.get_positions(), {"first": 3, "second": 7})
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# ... but calling `get_next` on the second instance should give a unique
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# stream ID
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async def _get_next_async2() -> None:
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async with second_id_gen.get_next() as stream_id:
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self.assertEqual(stream_id, 9)
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self.assertEqual(
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second_id_gen.get_positions(), {"first": 3, "second": 7}
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)
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self.get_success(_get_next_async2())
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self.assertEqual(second_id_gen.get_positions(), {"first": 3, "second": 9})
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# If the second ID gen gets told about the first, it correctly updates
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second_id_gen.advance("first", 8)
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self.assertEqual(second_id_gen.get_positions(), {"first": 8, "second": 9})
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def test_multi_instance_empty_row(self) -> None:
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"""Test that reads and writes from multiple processes are handled
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correctly, when one of the writers starts without any rows.
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"""
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# Insert some rows for two out of three of the ID gens.
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self._insert_rows("first", 3)
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self._insert_rows("second", 4)
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first_id_gen = self._create_id_generator(
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"first", writers=["first", "second", "third"]
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)
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second_id_gen = self._create_id_generator(
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"second", writers=["first", "second", "third"]
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)
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third_id_gen = self._create_id_generator(
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"third", writers=["first", "second", "third"]
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)
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self.assertEqual(
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first_id_gen.get_positions(), {"first": 3, "second": 7, "third": 7}
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)
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self.assertEqual(first_id_gen.get_current_token_for_writer("first"), 7)
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self.assertEqual(first_id_gen.get_current_token_for_writer("second"), 7)
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self.assertEqual(first_id_gen.get_current_token_for_writer("third"), 7)
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self.assertEqual(
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second_id_gen.get_positions(), {"first": 3, "second": 7, "third": 7}
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)
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self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 7)
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self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 7)
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self.assertEqual(second_id_gen.get_current_token_for_writer("third"), 7)
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# Try allocating a new ID gen and check that we only see position
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# advanced after we leave the context manager.
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async def _get_next_async() -> None:
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async with third_id_gen.get_next() as stream_id:
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self.assertEqual(stream_id, 8)
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self.assertEqual(
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third_id_gen.get_positions(), {"first": 3, "second": 7, "third": 7}
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)
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self.assertEqual(third_id_gen.get_persisted_upto_position(), 7)
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self.get_success(_get_next_async())
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self.assertEqual(
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third_id_gen.get_positions(), {"first": 3, "second": 7, "third": 8}
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)
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def test_get_next_txn(self) -> None:
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"""Test that the `get_next_txn` function works correctly."""
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# Prefill table with 7 rows written by 'master'
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self._insert_rows("master", 7)
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id_gen = self._create_id_generator()
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self.assertEqual(id_gen.get_positions(), {"master": 7})
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self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
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# Try allocating a new ID gen and check that we only see position
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# advanced after we leave the context manager.
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def _get_next_txn(txn: LoggingTransaction) -> None:
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stream_id = id_gen.get_next_txn(txn)
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self.assertEqual(stream_id, 8)
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self.assertEqual(id_gen.get_positions(), {"master": 7})
|
|
self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
|
|
|
|
self.get_success(self.db_pool.runInteraction("test", _get_next_txn))
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"master": 8})
|
|
self.assertEqual(id_gen.get_current_token_for_writer("master"), 8)
|
|
|
|
def test_get_persisted_upto_position(self) -> None:
|
|
"""Test that `get_persisted_upto_position` correctly tracks updates to
|
|
positions.
|
|
"""
|
|
|
|
# The following tests are a bit cheeky in that we notify about new
|
|
# positions via `advance` without *actually* advancing the postgres
|
|
# sequence.
|
|
|
|
self._insert_row_with_id("first", 3)
|
|
self._insert_row_with_id("second", 5)
|
|
|
|
id_gen = self._create_id_generator("worker", writers=["first", "second"])
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"first": 3, "second": 5})
|
|
|
|
# Min is 3 and there is a gap between 5, so we expect it to be 3.
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 3)
|
|
|
|
# We advance "first" straight to 6. Min is now 5 but there is no gap so
|
|
# we expect it to be 6
|
|
id_gen.advance("first", 6)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 6)
|
|
|
|
# No gap, so we expect 7.
|
|
id_gen.advance("second", 7)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 7)
|
|
|
|
# We haven't seen 8 yet, so we expect 7 still.
|
|
id_gen.advance("second", 9)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 7)
|
|
|
|
# Now that we've seen 7, 8 and 9 we can got straight to 9.
|
|
id_gen.advance("first", 8)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 9)
|
|
|
|
# Jump forward with gaps. The minimum is 11, even though we haven't seen
|
|
# 10 we know that everything before 11 must be persisted.
|
|
id_gen.advance("first", 11)
|
|
id_gen.advance("second", 15)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 11)
|
|
|
|
def test_get_persisted_upto_position_get_next(self) -> None:
|
|
"""Test that `get_persisted_upto_position` correctly tracks updates to
|
|
positions when `get_next` is called.
|
|
"""
|
|
|
|
self._insert_row_with_id("first", 3)
|
|
self._insert_row_with_id("second", 5)
|
|
|
|
id_gen = self._create_id_generator("first", writers=["first", "second"])
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"first": 3, "second": 5})
|
|
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 5)
|
|
|
|
async def _get_next_async() -> None:
|
|
async with id_gen.get_next() as stream_id:
|
|
self.assertEqual(stream_id, 6)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 5)
|
|
|
|
self.get_success(_get_next_async())
|
|
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 6)
|
|
|
|
# We assume that so long as `get_next` does correctly advance the
|
|
# `persisted_upto_position` in this case, then it will be correct in the
|
|
# other cases that are tested above (since they'll hit the same code).
|
|
|
|
def test_restart_during_out_of_order_persistence(self) -> None:
|
|
"""Test that restarting a process while another process is writing out
|
|
of order updates are handled correctly.
|
|
"""
|
|
|
|
# Prefill table with 7 rows written by 'master'
|
|
self._insert_rows("master", 7)
|
|
|
|
id_gen = self._create_id_generator()
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"master": 7})
|
|
self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
|
|
|
|
# Persist two rows at once
|
|
ctx1 = id_gen.get_next()
|
|
ctx2 = id_gen.get_next()
|
|
|
|
s1 = self.get_success(ctx1.__aenter__())
|
|
s2 = self.get_success(ctx2.__aenter__())
|
|
|
|
self.assertEqual(s1, 8)
|
|
self.assertEqual(s2, 9)
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"master": 7})
|
|
self.assertEqual(id_gen.get_current_token_for_writer("master"), 7)
|
|
|
|
# We finish persisting the second row before restart
|
|
self.get_success(ctx2.__aexit__(None, None, None))
|
|
|
|
# We simulate a restart of another worker by just creating a new ID gen.
|
|
id_gen_worker = self._create_id_generator("worker")
|
|
|
|
# Restarted worker should not see the second persisted row
|
|
self.assertEqual(id_gen_worker.get_positions(), {"master": 7})
|
|
self.assertEqual(id_gen_worker.get_current_token_for_writer("master"), 7)
|
|
|
|
# Now if we persist the first row then both instances should jump ahead
|
|
# correctly.
|
|
self.get_success(ctx1.__aexit__(None, None, None))
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"master": 9})
|
|
id_gen_worker.advance("master", 9)
|
|
self.assertEqual(id_gen_worker.get_positions(), {"master": 9})
|
|
|
|
def test_writer_config_change(self) -> None:
|
|
"""Test that changing the writer config correctly works."""
|
|
|
|
self._insert_row_with_id("first", 3)
|
|
self._insert_row_with_id("second", 5)
|
|
|
|
# Initial config has two writers
|
|
id_gen = self._create_id_generator("worker", writers=["first", "second"])
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), 3)
|
|
self.assertEqual(id_gen.get_current_token_for_writer("first"), 3)
|
|
self.assertEqual(id_gen.get_current_token_for_writer("second"), 5)
|
|
|
|
# New config removes one of the configs. Note that if the writer is
|
|
# removed from config we assume that it has been shut down and has
|
|
# finished persisting, hence why the persisted upto position is 5.
|
|
id_gen_2 = self._create_id_generator("second", writers=["second"])
|
|
self.assertEqual(id_gen_2.get_persisted_upto_position(), 5)
|
|
self.assertEqual(id_gen_2.get_current_token_for_writer("second"), 5)
|
|
|
|
# This config points to a single, previously unused writer.
|
|
id_gen_3 = self._create_id_generator("third", writers=["third"])
|
|
self.assertEqual(id_gen_3.get_persisted_upto_position(), 5)
|
|
|
|
# For new writers we assume their initial position to be the current
|
|
# persisted up to position. This stops Synapse from doing a full table
|
|
# scan when a new writer comes along.
|
|
self.assertEqual(id_gen_3.get_current_token_for_writer("third"), 5)
|
|
|
|
id_gen_4 = self._create_id_generator("fourth", writers=["third"])
|
|
self.assertEqual(id_gen_4.get_current_token_for_writer("third"), 5)
|
|
|
|
# Check that we get a sane next stream ID with this new config.
|
|
|
|
async def _get_next_async() -> None:
|
|
async with id_gen_3.get_next() as stream_id:
|
|
self.assertEqual(stream_id, 6)
|
|
|
|
self.get_success(_get_next_async())
|
|
self.assertEqual(id_gen_3.get_persisted_upto_position(), 6)
|
|
|
|
# If we add back the old "first" then we shouldn't see the persisted up
|
|
# to position revert back to 3.
|
|
id_gen_5 = self._create_id_generator("five", writers=["first", "third"])
|
|
self.assertEqual(id_gen_5.get_persisted_upto_position(), 6)
|
|
self.assertEqual(id_gen_5.get_current_token_for_writer("first"), 6)
|
|
self.assertEqual(id_gen_5.get_current_token_for_writer("third"), 6)
|
|
|
|
def test_sequence_consistency(self) -> None:
|
|
"""Test that we error out if the table and sequence diverges."""
|
|
|
|
# Prefill with some rows
|
|
self._insert_row_with_id("master", 3)
|
|
|
|
# Now we add a row *without* updating the stream ID
|
|
def _insert(txn: Cursor) -> None:
|
|
txn.execute("INSERT INTO foobar VALUES (26, 'master')")
|
|
|
|
self.get_success(self.db_pool.runInteraction("_insert", _insert))
|
|
|
|
# Creating the ID gen should error
|
|
with self.assertRaises(IncorrectDatabaseSetup):
|
|
self._create_id_generator("first")
|
|
|
|
def test_minimal_local_token(self) -> None:
|
|
self._insert_rows("first", 3)
|
|
self._insert_rows("second", 4)
|
|
|
|
first_id_gen = self._create_id_generator("first", writers=["first", "second"])
|
|
second_id_gen = self._create_id_generator("second", writers=["first", "second"])
|
|
|
|
self.assertEqual(first_id_gen.get_positions(), {"first": 3, "second": 7})
|
|
self.assertEqual(first_id_gen.get_minimal_local_current_token(), 3)
|
|
|
|
self.assertEqual(second_id_gen.get_positions(), {"first": 3, "second": 7})
|
|
self.assertEqual(second_id_gen.get_minimal_local_current_token(), 7)
|
|
|
|
def test_current_token_gap(self) -> None:
|
|
"""Test that getting the current token for a writer returns the maximal
|
|
token when there are no writes.
|
|
"""
|
|
self._insert_rows("first", 3)
|
|
self._insert_rows("second", 4)
|
|
|
|
first_id_gen = self._create_id_generator(
|
|
"first", writers=["first", "second", "third"]
|
|
)
|
|
second_id_gen = self._create_id_generator(
|
|
"second", writers=["first", "second", "third"]
|
|
)
|
|
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 7)
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 7)
|
|
self.assertEqual(second_id_gen.get_current_token(), 7)
|
|
|
|
# Check that the first ID gen advancing causes the second ID gen to
|
|
# advance (as the second ID gen has nothing in flight).
|
|
|
|
async def _get_next_async() -> None:
|
|
async with first_id_gen.get_next_mult(2):
|
|
pass
|
|
|
|
self.get_success(_get_next_async())
|
|
second_id_gen.advance("first", 9)
|
|
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 9)
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 9)
|
|
self.assertEqual(second_id_gen.get_current_token(), 7)
|
|
|
|
# Check that the first ID gen advancing doesn't advance the second ID
|
|
# gen when the second ID gen has stuff in flight.
|
|
self.get_success(_get_next_async())
|
|
|
|
ctxmgr = second_id_gen.get_next()
|
|
self.get_success(ctxmgr.__aenter__())
|
|
|
|
second_id_gen.advance("first", 11)
|
|
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 11)
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 9)
|
|
self.assertEqual(second_id_gen.get_current_token(), 7)
|
|
|
|
self.get_success(ctxmgr.__aexit__(None, None, None))
|
|
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 11)
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 12)
|
|
self.assertEqual(second_id_gen.get_current_token(), 7)
|
|
|
|
|
|
class BackwardsMultiWriterIdGeneratorTestCase(HomeserverTestCase):
|
|
"""Tests MultiWriterIdGenerator that produce *negative* stream IDs."""
|
|
|
|
if not USE_POSTGRES_FOR_TESTS:
|
|
skip = "Requires Postgres"
|
|
|
|
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
|
|
self.store = hs.get_datastores().main
|
|
self.db_pool: DatabasePool = self.store.db_pool
|
|
|
|
self.get_success(self.db_pool.runInteraction("_setup_db", self._setup_db))
|
|
|
|
def _setup_db(self, txn: LoggingTransaction) -> None:
|
|
txn.execute("CREATE SEQUENCE foobar_seq")
|
|
txn.execute(
|
|
"""
|
|
CREATE TABLE foobar (
|
|
stream_id BIGINT NOT NULL,
|
|
instance_name TEXT NOT NULL,
|
|
data TEXT
|
|
);
|
|
"""
|
|
)
|
|
|
|
def _create_id_generator(
|
|
self, instance_name: str = "master", writers: Optional[List[str]] = None
|
|
) -> MultiWriterIdGenerator:
|
|
def _create(conn: LoggingDatabaseConnection) -> MultiWriterIdGenerator:
|
|
return MultiWriterIdGenerator(
|
|
conn,
|
|
self.db_pool,
|
|
notifier=self.hs.get_replication_notifier(),
|
|
stream_name="test_stream",
|
|
instance_name=instance_name,
|
|
tables=[("foobar", "instance_name", "stream_id")],
|
|
sequence_name="foobar_seq",
|
|
writers=writers or ["master"],
|
|
positive=False,
|
|
)
|
|
|
|
return self.get_success(self.db_pool.runWithConnection(_create))
|
|
|
|
def _insert_row(self, instance_name: str, stream_id: int) -> None:
|
|
"""Insert one row as the given instance with given stream_id."""
|
|
|
|
def _insert(txn: LoggingTransaction) -> None:
|
|
txn.execute(
|
|
"INSERT INTO foobar VALUES (?, ?)",
|
|
(
|
|
stream_id,
|
|
instance_name,
|
|
),
|
|
)
|
|
txn.execute(
|
|
"""
|
|
INSERT INTO stream_positions VALUES ('test_stream', ?, ?)
|
|
ON CONFLICT (stream_name, instance_name) DO UPDATE SET stream_id = ?
|
|
""",
|
|
(instance_name, -stream_id, -stream_id),
|
|
)
|
|
|
|
self.get_success(self.db_pool.runInteraction("_insert_row", _insert))
|
|
|
|
def test_single_instance(self) -> None:
|
|
"""Test that reads and writes from a single process are handled
|
|
correctly.
|
|
"""
|
|
id_gen = self._create_id_generator()
|
|
|
|
async def _get_next_async() -> None:
|
|
async with id_gen.get_next() as stream_id:
|
|
self._insert_row("master", stream_id)
|
|
|
|
self.get_success(_get_next_async())
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"master": -1})
|
|
self.assertEqual(id_gen.get_current_token_for_writer("master"), -1)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), -1)
|
|
|
|
async def _get_next_async2() -> None:
|
|
async with id_gen.get_next_mult(3) as stream_ids:
|
|
for stream_id in stream_ids:
|
|
self._insert_row("master", stream_id)
|
|
|
|
self.get_success(_get_next_async2())
|
|
|
|
self.assertEqual(id_gen.get_positions(), {"master": -4})
|
|
self.assertEqual(id_gen.get_current_token_for_writer("master"), -4)
|
|
self.assertEqual(id_gen.get_persisted_upto_position(), -4)
|
|
|
|
# Test loading from DB by creating a second ID gen
|
|
second_id_gen = self._create_id_generator()
|
|
|
|
self.assertEqual(second_id_gen.get_positions(), {"master": -4})
|
|
self.assertEqual(second_id_gen.get_current_token_for_writer("master"), -4)
|
|
self.assertEqual(second_id_gen.get_persisted_upto_position(), -4)
|
|
|
|
def test_multiple_instance(self) -> None:
|
|
"""Tests that having multiple instances that get advanced over
|
|
federation works corretly.
|
|
"""
|
|
id_gen_1 = self._create_id_generator("first", writers=["first", "second"])
|
|
id_gen_2 = self._create_id_generator("second", writers=["first", "second"])
|
|
|
|
async def _get_next_async() -> None:
|
|
async with id_gen_1.get_next() as stream_id:
|
|
self._insert_row("first", stream_id)
|
|
id_gen_2.advance("first", stream_id)
|
|
|
|
self.get_success(_get_next_async())
|
|
|
|
self.assertEqual(id_gen_1.get_positions(), {"first": -1, "second": -1})
|
|
self.assertEqual(id_gen_2.get_positions(), {"first": -1, "second": -1})
|
|
self.assertEqual(id_gen_1.get_persisted_upto_position(), -1)
|
|
self.assertEqual(id_gen_2.get_persisted_upto_position(), -1)
|
|
|
|
async def _get_next_async2() -> None:
|
|
async with id_gen_2.get_next() as stream_id:
|
|
self._insert_row("second", stream_id)
|
|
id_gen_1.advance("second", stream_id)
|
|
|
|
self.get_success(_get_next_async2())
|
|
|
|
self.assertEqual(id_gen_1.get_positions(), {"first": -1, "second": -2})
|
|
self.assertEqual(id_gen_2.get_positions(), {"first": -1, "second": -2})
|
|
self.assertEqual(id_gen_1.get_persisted_upto_position(), -2)
|
|
self.assertEqual(id_gen_2.get_persisted_upto_position(), -2)
|
|
|
|
|
|
class MultiTableMultiWriterIdGeneratorTestCase(HomeserverTestCase):
|
|
if not USE_POSTGRES_FOR_TESTS:
|
|
skip = "Requires Postgres"
|
|
|
|
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
|
|
self.store = hs.get_datastores().main
|
|
self.db_pool: DatabasePool = self.store.db_pool
|
|
|
|
self.get_success(self.db_pool.runInteraction("_setup_db", self._setup_db))
|
|
|
|
def _setup_db(self, txn: LoggingTransaction) -> None:
|
|
txn.execute("CREATE SEQUENCE foobar_seq")
|
|
txn.execute(
|
|
"""
|
|
CREATE TABLE foobar1 (
|
|
stream_id BIGINT NOT NULL,
|
|
instance_name TEXT NOT NULL,
|
|
data TEXT
|
|
);
|
|
"""
|
|
)
|
|
|
|
txn.execute(
|
|
"""
|
|
CREATE TABLE foobar2 (
|
|
stream_id BIGINT NOT NULL,
|
|
instance_name TEXT NOT NULL,
|
|
data TEXT
|
|
);
|
|
"""
|
|
)
|
|
|
|
def _create_id_generator(
|
|
self, instance_name: str = "master", writers: Optional[List[str]] = None
|
|
) -> MultiWriterIdGenerator:
|
|
def _create(conn: LoggingDatabaseConnection) -> MultiWriterIdGenerator:
|
|
return MultiWriterIdGenerator(
|
|
conn,
|
|
self.db_pool,
|
|
notifier=self.hs.get_replication_notifier(),
|
|
stream_name="test_stream",
|
|
instance_name=instance_name,
|
|
tables=[
|
|
("foobar1", "instance_name", "stream_id"),
|
|
("foobar2", "instance_name", "stream_id"),
|
|
],
|
|
sequence_name="foobar_seq",
|
|
writers=writers or ["master"],
|
|
)
|
|
|
|
return self.get_success_or_raise(self.db_pool.runWithConnection(_create))
|
|
|
|
def _insert_rows(
|
|
self,
|
|
table: str,
|
|
instance_name: str,
|
|
number: int,
|
|
update_stream_table: bool = True,
|
|
) -> None:
|
|
"""Insert N rows as the given instance, inserting with stream IDs pulled
|
|
from the postgres sequence.
|
|
"""
|
|
|
|
def _insert(txn: LoggingTransaction) -> None:
|
|
for _ in range(number):
|
|
txn.execute(
|
|
"INSERT INTO %s VALUES (nextval('foobar_seq'), ?)" % (table,),
|
|
(instance_name,),
|
|
)
|
|
if update_stream_table:
|
|
txn.execute(
|
|
"""
|
|
INSERT INTO stream_positions VALUES ('test_stream', ?, lastval())
|
|
ON CONFLICT (stream_name, instance_name) DO UPDATE SET stream_id = lastval()
|
|
""",
|
|
(instance_name,),
|
|
)
|
|
|
|
self.get_success(self.db_pool.runInteraction("_insert_rows", _insert))
|
|
|
|
def test_load_existing_stream(self) -> None:
|
|
"""Test creating ID gens with multiple tables that have rows from after
|
|
the position in `stream_positions` table.
|
|
"""
|
|
self._insert_rows("foobar1", "first", 3)
|
|
self._insert_rows("foobar2", "second", 3)
|
|
self._insert_rows("foobar2", "second", 1, update_stream_table=False)
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first_id_gen = self._create_id_generator("first", writers=["first", "second"])
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second_id_gen = self._create_id_generator("second", writers=["first", "second"])
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self.assertEqual(first_id_gen.get_positions(), {"first": 3, "second": 6})
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self.assertEqual(first_id_gen.get_current_token_for_writer("first"), 7)
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self.assertEqual(first_id_gen.get_current_token_for_writer("second"), 7)
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self.assertEqual(first_id_gen.get_persisted_upto_position(), 7)
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self.assertEqual(second_id_gen.get_positions(), {"first": 3, "second": 7})
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self.assertEqual(second_id_gen.get_current_token_for_writer("first"), 7)
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self.assertEqual(second_id_gen.get_current_token_for_writer("second"), 7)
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self.assertEqual(second_id_gen.get_persisted_upto_position(), 7)
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