113 lines
3.9 KiB
Python
113 lines
3.9 KiB
Python
# Copyright 2021 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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import logging
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from typing import Any, Dict, List
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from synapse.api.errors import SynapseError
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from synapse.storage.database import LoggingTransaction
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from synapse.storage.databases.main import CacheInvalidationWorkerStore
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from synapse.storage.databases.main.event_federation import EventFederationWorkerStore
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logger = logging.getLogger(__name__)
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class EventForwardExtremitiesStore(
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EventFederationWorkerStore,
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CacheInvalidationWorkerStore,
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):
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async def delete_forward_extremities_for_room(self, room_id: str) -> int:
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"""Delete any extra forward extremities for a room.
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Invalidates the "get_latest_event_ids_in_room" cache if any forward
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extremities were deleted.
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Returns count deleted.
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"""
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def delete_forward_extremities_for_room_txn(txn: LoggingTransaction) -> int:
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# First we need to get the event_id to not delete
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sql = """
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SELECT event_id FROM event_forward_extremities
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INNER JOIN events USING (room_id, event_id)
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WHERE room_id = ?
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ORDER BY stream_ordering DESC
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LIMIT 1
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"""
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txn.execute(sql, (room_id,))
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rows = txn.fetchall()
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try:
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event_id = rows[0][0]
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logger.debug(
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"Found event_id %s as the forward extremity to keep for room %s",
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event_id,
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room_id,
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)
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except KeyError:
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msg = "No forward extremity event found for room %s" % room_id
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logger.warning(msg)
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raise SynapseError(400, msg)
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# Now delete the extra forward extremities
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sql = """
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DELETE FROM event_forward_extremities
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WHERE event_id != ? AND room_id = ?
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"""
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txn.execute(sql, (event_id, room_id))
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logger.info(
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"Deleted %s extra forward extremities for room %s",
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txn.rowcount,
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room_id,
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)
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if txn.rowcount > 0:
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# Invalidate the cache
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self._invalidate_cache_and_stream(
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txn,
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self.get_latest_event_ids_in_room,
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(room_id,),
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)
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return txn.rowcount
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return await self.db_pool.runInteraction(
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"delete_forward_extremities_for_room",
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delete_forward_extremities_for_room_txn,
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)
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async def get_forward_extremities_for_room(
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self, room_id: str
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) -> List[Dict[str, Any]]:
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"""Get list of forward extremities for a room."""
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def get_forward_extremities_for_room_txn(
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txn: LoggingTransaction,
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) -> List[Dict[str, Any]]:
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sql = """
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SELECT event_id, state_group, depth, received_ts
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FROM event_forward_extremities
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INNER JOIN event_to_state_groups USING (event_id)
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INNER JOIN events USING (room_id, event_id)
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WHERE room_id = ?
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"""
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txn.execute(sql, (room_id,))
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return self.db_pool.cursor_to_dict(txn)
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return await self.db_pool.runInteraction(
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"get_forward_extremities_for_room",
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get_forward_extremities_for_room_txn,
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)
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