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Remove slaved id tracker (#14376) 

This matches the multi instance writer ID generator class which can
both handle advancing the current token over replication and by calling
the database.
This commit is contained in:
Nick Mills-Barrett 2022-11-14 17:31:36 +00:00 committed by GitHub
parent e226513c0f
commit 36097e88c4
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11 changed files with 74 additions and 176 deletions
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1
changelog.d/14376.misc Normal file
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@ -0,0 +1 @@
Remove old stream ID tracking code. Contributed by Nick @Beeper (@fizzadar).

13
synapse/replication/slave/__init__.py
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@ -1,13 +0,0 @@
# Copyright 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

13
synapse/replication/slave/storage/__init__.py
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@ -1,13 +0,0 @@
# Copyright 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

50
synapse/replication/slave/storage/_slaved_id_tracker.py
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@ -1,50 +0,0 @@
# Copyright 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import List, Optional, Tuple
from synapse.storage.database import LoggingDatabaseConnection
from synapse.storage.util.id_generators import AbstractStreamIdTracker, _load_current_id
class SlavedIdTracker(AbstractStreamIdTracker):
"""Tracks the "current" stream ID of a stream with a single writer.
See `AbstractStreamIdTracker` for more details.
Note that this class does not work correctly when there are multiple
writers.
"""
def __init__(
self,
db_conn: LoggingDatabaseConnection,
table: str,
column: str,
extra_tables: Optional[List[Tuple[str, str]]] = None,
step: int = 1,
):
self.step = step
self._current = _load_current_id(db_conn, table, column, step)
if extra_tables:
for table, column in extra_tables:
self.advance(None, _load_current_id(db_conn, table, column))
def advance(self, instance_name: Optional[str], new_id: int) -> None:
self._current = (max if self.step > 0 else min)(self._current, new_id)
def get_current_token(self) -> int:
return self._current
def get_current_token_for_writer(self, instance_name: str) -> int:
return self.get_current_token()

14
synapse/storage/databases/main/account_data.py
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@ -27,7 +27,6 @@ from typing import (
)
from synapse.api.constants import AccountDataTypes
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import AccountDataStream, TagAccountDataStream
from synapse.storage._base import db_to_json
from synapse.storage.database import (
@ -68,12 +67,11 @@ class AccountDataWorkerStore(PushRulesWorkerStore, CacheInvalidationWorkerStore)
# to write account data. A value of `True` implies that `_account_data_id_gen`
# is an `AbstractStreamIdGenerator` and not just a tracker.
self._account_data_id_gen: AbstractStreamIdTracker
if isinstance(database.engine, PostgresEngine):
self._can_write_to_account_data = (
self._instance_name in hs.config.worker.writers.account_data
)
if isinstance(database.engine, PostgresEngine):
self._account_data_id_gen = MultiWriterIdGenerator(
db_conn=db_conn,
db=database,
@ -95,20 +93,12 @@ class AccountDataWorkerStore(PushRulesWorkerStore, CacheInvalidationWorkerStore)
# `StreamIdGenerator`, otherwise we use `SlavedIdTracker` which gets
# updated over replication. (Multiple writers are not supported for
# SQLite).
if self._instance_name in hs.config.worker.writers.account_data:
self._can_write_to_account_data = True
self._account_data_id_gen = StreamIdGenerator(
db_conn,
"room_account_data",
"stream_id",
extra_tables=[("room_tags_revisions", "stream_id")],
)
else:
self._account_data_id_gen = SlavedIdTracker(
db_conn,
"room_account_data",
"stream_id",
extra_tables=[("room_tags_revisions", "stream_id")],
is_writer=self._instance_name in hs.config.worker.writers.account_data,
)
account_max = self.get_max_account_data_stream_id()

16
synapse/storage/databases/main/devices.py
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@ -38,7 +38,6 @@ from synapse.logging.opentracing import (
whitelisted_homeserver,
)
from synapse.metrics.background_process_metrics import wrap_as_background_process
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams._base import DeviceListsStream, UserSignatureStream
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
from synapse.storage.database import (
@ -86,7 +85,8 @@ class DeviceWorkerStore(RoomMemberWorkerStore, EndToEndKeyWorkerStore):
):
super().__init__(database, db_conn, hs)
if hs.config.worker.worker_app is None:
# In the worker store this is an ID tracker which we overwrite in the non-worker
# class below that is used on the main process.
self._device_list_id_gen: AbstractStreamIdTracker = StreamIdGenerator(
db_conn,
"device_lists_stream",
@ -96,17 +96,7 @@ class DeviceWorkerStore(RoomMemberWorkerStore, EndToEndKeyWorkerStore):
("device_lists_outbound_pokes", "stream_id"),
("device_lists_changes_in_room", "stream_id"),
],
)
else:
self._device_list_id_gen = SlavedIdTracker(
db_conn,
"device_lists_stream",
"stream_id",
extra_tables=[
("user_signature_stream", "stream_id"),
("device_lists_outbound_pokes", "stream_id"),
("device_lists_changes_in_room", "stream_id"),
],
is_writer=hs.config.worker.worker_app is None,
)
# Type-ignore: _device_list_id_gen is mixed in from either DataStore (as a

11
synapse/storage/databases/main/events_worker.py
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@ -59,7 +59,6 @@ from synapse.metrics.background_process_metrics import (
run_as_background_process,
wrap_as_background_process,
)
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import BackfillStream
from synapse.replication.tcp.streams.events import EventsStream
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
@ -213,11 +212,11 @@ class EventsWorkerStore(SQLBaseStore):
# `StreamIdGenerator`, otherwise we use `SlavedIdTracker` which gets
# updated over replication. (Multiple writers are not supported for
# SQLite).
if hs.get_instance_name() in hs.config.worker.writers.events:
self._stream_id_gen = StreamIdGenerator(
db_conn,
"events",
"stream_ordering",
is_writer=hs.get_instance_name() in hs.config.worker.writers.events,
)
self._backfill_id_gen = StreamIdGenerator(
db_conn,
@ -225,13 +224,7 @@ class EventsWorkerStore(SQLBaseStore):
"stream_ordering",
step=-1,
extra_tables=[("ex_outlier_stream", "event_stream_ordering")],
)
else:
self._stream_id_gen = SlavedIdTracker(
db_conn, "events", "stream_ordering"
)
self._backfill_id_gen = SlavedIdTracker(
db_conn, "events", "stream_ordering", step=-1
is_writer=hs.get_instance_name() in hs.config.worker.writers.events,
)
events_max = self._stream_id_gen.get_current_token()

13
synapse/storage/databases/main/push_rule.py
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@ -30,7 +30,6 @@ from typing import (
from synapse.api.errors import StoreError
from synapse.config.homeserver import ExperimentalConfig
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import PushRulesStream
from synapse.storage._base import SQLBaseStore
from synapse.storage.database import (
@ -111,13 +110,13 @@ class PushRulesWorkerStore(
):
super().__init__(database, db_conn, hs)
if hs.config.worker.worker_app is None:
# In the worker store this is an ID tracker which we overwrite in the non-worker
# class below that is used on the main process.
self._push_rules_stream_id_gen: AbstractStreamIdTracker = StreamIdGenerator(
db_conn, "push_rules_stream", "stream_id"
)
else:
self._push_rules_stream_id_gen = SlavedIdTracker(
db_conn, "push_rules_stream", "stream_id"
db_conn,
"push_rules_stream",
"stream_id",
is_writer=hs.config.worker.worker_app is None,
)
push_rules_prefill, push_rules_id = self.db_pool.get_cache_dict(

12
synapse/storage/databases/main/pusher.py
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@ -27,7 +27,6 @@ from typing import (
)
from synapse.push import PusherConfig, ThrottleParams
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import PushersStream
from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import (
@ -59,19 +58,14 @@ class PusherWorkerStore(SQLBaseStore):
):
super().__init__(database, db_conn, hs)
if hs.config.worker.worker_app is None:
# In the worker store this is an ID tracker which we overwrite in the non-worker
# class below that is used on the main process.
self._pushers_id_gen: AbstractStreamIdTracker = StreamIdGenerator(
db_conn,
"pushers",
"id",
extra_tables=[("deleted_pushers", "stream_id")],
)
else:
self._pushers_id_gen = SlavedIdTracker(
db_conn,
"pushers",
"id",
extra_tables=[("deleted_pushers", "stream_id")],
is_writer=hs.config.worker.worker_app is None,
)
self.db_pool.updates.register_background_update_handler(

14
synapse/storage/databases/main/receipts.py
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@ -27,7 +27,6 @@ from typing import (
)
from synapse.api.constants import EduTypes
from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
from synapse.replication.tcp.streams import ReceiptsStream
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
from synapse.storage.database import (
@ -61,6 +60,9 @@ class ReceiptsWorkerStore(SQLBaseStore):
hs: "HomeServer",
):
self._instance_name = hs.get_instance_name()
# In the worker store this is an ID tracker which we overwrite in the non-worker
# class below that is used on the main process.
self._receipts_id_gen: AbstractStreamIdTracker
if isinstance(database.engine, PostgresEngine):
@ -87,13 +89,11 @@ class ReceiptsWorkerStore(SQLBaseStore):
# `StreamIdGenerator`, otherwise we use `SlavedIdTracker` which gets
# updated over replication. (Multiple writers are not supported for
# SQLite).
if hs.get_instance_name() in hs.config.worker.writers.receipts:
self._receipts_id_gen = StreamIdGenerator(
db_conn, "receipts_linearized", "stream_id"
)
else:
self._receipts_id_gen = SlavedIdTracker(
db_conn, "receipts_linearized", "stream_id"
db_conn,
"receipts_linearized",
"stream_id",
is_writer=hs.get_instance_name() in hs.config.worker.writers.receipts,
)
super().__init__(database, db_conn, hs)

13
synapse/storage/util/id_generators.py
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@ -186,11 +186,13 @@ class StreamIdGenerator(AbstractStreamIdGenerator):
column: str,
extra_tables: Iterable[Tuple[str, str]] = (),
step: int = 1,
is_writer: bool = True,
) -> None:
assert step != 0
self._lock = threading.Lock()
self._step: int = step
self._current: int = _load_current_id(db_conn, table, column, step)
self._is_writer = is_writer
for table, column in extra_tables:
self._current = (max if step > 0 else min)(
self._current, _load_current_id(db_conn, table, column, step)
@ -204,9 +206,11 @@ class StreamIdGenerator(AbstractStreamIdGenerator):
self._unfinished_ids: OrderedDict[int, int] = OrderedDict()
def advance(self, instance_name: str, new_id: int) -> None:
# `StreamIdGenerator` should only be used when there is a single writer,
# so replication should never happen.
raise Exception("Replication is not supported by StreamIdGenerator")
# Advance should never be called on a writer instance, only over replication
if self._is_writer:
raise Exception("Replication is not supported by writer StreamIdGenerator")
self._current = (max if self._step > 0 else min)(self._current, new_id)
def get_next(self) -> AsyncContextManager[int]:
with self._lock:
@ -249,6 +253,9 @@ class StreamIdGenerator(AbstractStreamIdGenerator):
return _AsyncCtxManagerWrapper(manager())
def get_current_token(self) -> int:
if self._is_writer:
return self._current
with self._lock:
if self._unfinished_ids:
return next(iter(self._unfinished_ids)) - self._step