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* docs updates
* prettify SQL
* add missing copyright
* cursor_to_dict
* update touched files copyright years

Signed-off-by: Jason Robinson <jasonr@matrix.org>
This commit is contained in:
Jason Robinson 2021-01-11 23:43:58 +02:00
parent 0b77329fe2
commit da16d06301
5 changed files with 46 additions and 36 deletions
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12
docs/admin_api/rooms.md
View file

@ -516,11 +516,8 @@ optionally be specified, e.g.:
# Forward Extremities Admin API
Enables querying and deleting forward extremities from rooms. When a lot of forward
extremities accumulate in a room, performance can become degraded.
When using this API endpoint to delete any extra forward extremities for a room,
the server does not need to be restarted as the relevant caches will be cleared
in the API call.
extremities accumulate in a room, performance can become degraded. For details, see
[#1760](https://github.com/matrix-org/synapse/issues/1760).
## Check for forward extremities
@ -537,7 +534,7 @@ A response as follows will be returned:
"count": 1,
"results": [
{
"event_id": "$M5SP266vsnxctfwFgFLNceaCo3ujhRtg_NiiHabcdfgh",
"event_id": "$M5SP266vsnxctfwFgFLNceaCo3ujhRtg_NiiHabcdefgh",
"state_group": 439
}
]
@ -561,6 +558,3 @@ that were deleted.
"deleted": 1
}
```
The cache `get_latest_event_ids_in_room` will be invalidated, if any forward extremities
were deleted.

2
synapse/rest/admin/__init__.py
View file

@ -1,6 +1,8 @@
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2018-2019 New Vector Ltd
# Copyright 2020, 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.

2
synapse/rest/admin/rooms.py
View file

@ -1,5 +1,5 @@
# -*- coding: utf-8 -*-
# Copyright 2019 The Matrix.org Foundation C.I.C.
# Copyright 2019-2021 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.

2
synapse/storage/databases/main/__init__.py
View file

@ -1,7 +1,7 @@
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2018 New Vector Ltd
# Copyright 2019 The Matrix.org Foundation C.I.C.
# Copyright 2019-2021 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.

64
synapse/storage/databases/main/events_forward_extremities.py
View file

@ -1,3 +1,18 @@
# -*- coding: utf-8 -*-
# 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 logging
from typing import Dict, List
@ -19,19 +34,19 @@ class EventForwardExtremitiesStore(SQLBaseStore):
def delete_forward_extremities_for_room_txn(txn):
# First we need to get the event_id to not delete
sql = (
"SELECT "
" last_value(event_id) OVER w AS event_id"
" FROM event_forward_extremities"
" NATURAL JOIN events"
" where room_id = ?"
" WINDOW w AS ("
" PARTITION BY room_id"
" ORDER BY stream_ordering"
" range between unbounded preceding and unbounded following"
" )"
" ORDER BY stream_ordering"
)
sql = """
SELECT
last_value(event_id) OVER w AS event_id
FROM event_forward_extremities
NATURAL JOIN events
WHERE room_id = ?
WINDOW w AS (
PARTITION BY room_id
ORDER BY stream_ordering
range between unbounded preceding and unbounded following
)
ORDER BY stream_ordering
"""
txn.execute(sql, (room_id,))
rows = txn.fetchall()
try:
@ -47,12 +62,10 @@ class EventForwardExtremitiesStore(SQLBaseStore):
raise SynapseError(400, msg)
# Now delete the extra forward extremities
sql = (
"DELETE FROM event_forward_extremities "
"WHERE"
" event_id != ?"
" AND room_id = ?"
)
sql = """
DELETE FROM event_forward_extremities
WHERE event_id != ? AND room_id = ?
"""
txn.execute(sql, (event_id, room_id))
logger.info(
@ -78,14 +91,15 @@ class EventForwardExtremitiesStore(SQLBaseStore):
"""Get list of forward extremities for a room."""
def get_forward_extremities_for_room_txn(txn):
sql = (
"SELECT event_id, state_group FROM event_forward_extremities NATURAL JOIN event_to_state_groups "
"WHERE room_id = ?"
)
sql = """
SELECT event_id, state_group
FROM event_forward_extremities
NATURAL JOIN event_to_state_groups
WHERE room_id = ?
"""
txn.execute(sql, (room_id,))
rows = txn.fetchall()
return [{"event_id": row[0], "state_group": row[1]} for row in rows]
return self.db_pool.cursor_to_dict(txn)
return await self.db_pool.runInteraction(
"get_forward_extremities_for_room", get_forward_extremities_for_room_txn,