578 lines
21 KiB
Python
578 lines
21 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2019 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 synapse.api.constants import EventContentFields
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from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
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from synapse.storage.database import DatabasePool
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logger = logging.getLogger(__name__)
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class EventsBackgroundUpdatesStore(SQLBaseStore):
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EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts"
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EVENT_FIELDS_SENDER_URL_UPDATE_NAME = "event_fields_sender_url"
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DELETE_SOFT_FAILED_EXTREMITIES = "delete_soft_failed_extremities"
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def __init__(self, database: DatabasePool, db_conn, hs):
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super().__init__(database, db_conn, hs)
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self.db_pool.updates.register_background_update_handler(
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self.EVENT_ORIGIN_SERVER_TS_NAME, self._background_reindex_origin_server_ts
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)
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self.db_pool.updates.register_background_update_handler(
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self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME,
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self._background_reindex_fields_sender,
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)
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self.db_pool.updates.register_background_index_update(
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"event_contains_url_index",
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index_name="event_contains_url_index",
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table="events",
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columns=["room_id", "topological_ordering", "stream_ordering"],
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where_clause="contains_url = true AND outlier = false",
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)
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# an event_id index on event_search is useful for the purge_history
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# api. Plus it means we get to enforce some integrity with a UNIQUE
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# clause
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self.db_pool.updates.register_background_index_update(
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"event_search_event_id_idx",
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index_name="event_search_event_id_idx",
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table="event_search",
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columns=["event_id"],
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unique=True,
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psql_only=True,
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)
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self.db_pool.updates.register_background_update_handler(
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self.DELETE_SOFT_FAILED_EXTREMITIES, self._cleanup_extremities_bg_update
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)
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self.db_pool.updates.register_background_update_handler(
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"redactions_received_ts", self._redactions_received_ts
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)
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# This index gets deleted in `event_fix_redactions_bytes` update
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self.db_pool.updates.register_background_index_update(
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"event_fix_redactions_bytes_create_index",
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index_name="redactions_censored_redacts",
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table="redactions",
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columns=["redacts"],
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where_clause="have_censored",
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)
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self.db_pool.updates.register_background_update_handler(
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"event_fix_redactions_bytes", self._event_fix_redactions_bytes
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)
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self.db_pool.updates.register_background_update_handler(
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"event_store_labels", self._event_store_labels
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)
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self.db_pool.updates.register_background_index_update(
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"redactions_have_censored_ts_idx",
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index_name="redactions_have_censored_ts",
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table="redactions",
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columns=["received_ts"],
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where_clause="NOT have_censored",
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)
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async def _background_reindex_fields_sender(self, progress, batch_size):
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target_min_stream_id = progress["target_min_stream_id_inclusive"]
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max_stream_id = progress["max_stream_id_exclusive"]
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rows_inserted = progress.get("rows_inserted", 0)
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INSERT_CLUMP_SIZE = 1000
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def reindex_txn(txn):
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sql = (
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"SELECT stream_ordering, event_id, json FROM events"
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" INNER JOIN event_json USING (event_id)"
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" WHERE ? <= stream_ordering AND stream_ordering < ?"
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" ORDER BY stream_ordering DESC"
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" LIMIT ?"
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)
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txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
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rows = txn.fetchall()
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if not rows:
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return 0
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min_stream_id = rows[-1][0]
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update_rows = []
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for row in rows:
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try:
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event_id = row[1]
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event_json = db_to_json(row[2])
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sender = event_json["sender"]
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content = event_json["content"]
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contains_url = "url" in content
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if contains_url:
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contains_url &= isinstance(content["url"], str)
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except (KeyError, AttributeError):
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# If the event is missing a necessary field then
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# skip over it.
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continue
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update_rows.append((sender, contains_url, event_id))
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sql = "UPDATE events SET sender = ?, contains_url = ? WHERE event_id = ?"
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for index in range(0, len(update_rows), INSERT_CLUMP_SIZE):
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clump = update_rows[index : index + INSERT_CLUMP_SIZE]
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txn.executemany(sql, clump)
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progress = {
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"target_min_stream_id_inclusive": target_min_stream_id,
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"max_stream_id_exclusive": min_stream_id,
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"rows_inserted": rows_inserted + len(rows),
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}
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self.db_pool.updates._background_update_progress_txn(
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txn, self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME, progress
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)
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return len(rows)
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result = await self.db_pool.runInteraction(
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self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME, reindex_txn
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)
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if not result:
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await self.db_pool.updates._end_background_update(
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self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME
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)
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return result
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async def _background_reindex_origin_server_ts(self, progress, batch_size):
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target_min_stream_id = progress["target_min_stream_id_inclusive"]
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max_stream_id = progress["max_stream_id_exclusive"]
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rows_inserted = progress.get("rows_inserted", 0)
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INSERT_CLUMP_SIZE = 1000
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def reindex_search_txn(txn):
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sql = (
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"SELECT stream_ordering, event_id FROM events"
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" WHERE ? <= stream_ordering AND stream_ordering < ?"
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" ORDER BY stream_ordering DESC"
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" LIMIT ?"
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)
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txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
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rows = txn.fetchall()
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if not rows:
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return 0
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min_stream_id = rows[-1][0]
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event_ids = [row[1] for row in rows]
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rows_to_update = []
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chunks = [event_ids[i : i + 100] for i in range(0, len(event_ids), 100)]
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for chunk in chunks:
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ev_rows = self.db_pool.simple_select_many_txn(
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txn,
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table="event_json",
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column="event_id",
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iterable=chunk,
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retcols=["event_id", "json"],
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keyvalues={},
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)
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for row in ev_rows:
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event_id = row["event_id"]
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event_json = db_to_json(row["json"])
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try:
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origin_server_ts = event_json["origin_server_ts"]
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except (KeyError, AttributeError):
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# If the event is missing a necessary field then
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# skip over it.
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continue
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rows_to_update.append((origin_server_ts, event_id))
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sql = "UPDATE events SET origin_server_ts = ? WHERE event_id = ?"
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for index in range(0, len(rows_to_update), INSERT_CLUMP_SIZE):
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clump = rows_to_update[index : index + INSERT_CLUMP_SIZE]
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txn.executemany(sql, clump)
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progress = {
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"target_min_stream_id_inclusive": target_min_stream_id,
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"max_stream_id_exclusive": min_stream_id,
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"rows_inserted": rows_inserted + len(rows_to_update),
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}
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self.db_pool.updates._background_update_progress_txn(
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txn, self.EVENT_ORIGIN_SERVER_TS_NAME, progress
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)
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return len(rows_to_update)
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result = await self.db_pool.runInteraction(
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self.EVENT_ORIGIN_SERVER_TS_NAME, reindex_search_txn
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)
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if not result:
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await self.db_pool.updates._end_background_update(
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self.EVENT_ORIGIN_SERVER_TS_NAME
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)
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return result
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async def _cleanup_extremities_bg_update(self, progress, batch_size):
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"""Background update to clean out extremities that should have been
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deleted previously.
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Mainly used to deal with the aftermath of #5269.
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"""
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# This works by first copying all existing forward extremities into the
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# `_extremities_to_check` table at start up, and then checking each
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# event in that table whether we have any descendants that are not
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# soft-failed/rejected. If that is the case then we delete that event
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# from the forward extremities table.
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#
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# For efficiency, we do this in batches by recursively pulling out all
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# descendants of a batch until we find the non soft-failed/rejected
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# events, i.e. the set of descendants whose chain of prev events back
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# to the batch of extremities are all soft-failed or rejected.
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# Typically, we won't find any such events as extremities will rarely
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# have any descendants, but if they do then we should delete those
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# extremities.
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def _cleanup_extremities_bg_update_txn(txn):
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# The set of extremity event IDs that we're checking this round
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original_set = set()
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# A dict[str, set[str]] of event ID to their prev events.
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graph = {}
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# The set of descendants of the original set that are not rejected
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# nor soft-failed. Ancestors of these events should be removed
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# from the forward extremities table.
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non_rejected_leaves = set()
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# Set of event IDs that have been soft failed, and for which we
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# should check if they have descendants which haven't been soft
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# failed.
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soft_failed_events_to_lookup = set()
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# First, we get `batch_size` events from the table, pulling out
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# their successor events, if any, and the successor events'
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# rejection status.
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txn.execute(
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"""SELECT prev_event_id, event_id, internal_metadata,
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rejections.event_id IS NOT NULL, events.outlier
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FROM (
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SELECT event_id AS prev_event_id
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FROM _extremities_to_check
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LIMIT ?
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) AS f
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LEFT JOIN event_edges USING (prev_event_id)
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LEFT JOIN events USING (event_id)
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LEFT JOIN event_json USING (event_id)
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LEFT JOIN rejections USING (event_id)
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""",
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(batch_size,),
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)
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for prev_event_id, event_id, metadata, rejected, outlier in txn:
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original_set.add(prev_event_id)
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if not event_id or outlier:
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# Common case where the forward extremity doesn't have any
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# descendants.
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continue
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graph.setdefault(event_id, set()).add(prev_event_id)
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soft_failed = False
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if metadata:
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soft_failed = db_to_json(metadata).get("soft_failed")
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if soft_failed or rejected:
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soft_failed_events_to_lookup.add(event_id)
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else:
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non_rejected_leaves.add(event_id)
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# Now we recursively check all the soft-failed descendants we
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# found above in the same way, until we have nothing left to
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# check.
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while soft_failed_events_to_lookup:
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# We only want to do 100 at a time, so we split given list
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# into two.
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batch = list(soft_failed_events_to_lookup)
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to_check, to_defer = batch[:100], batch[100:]
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soft_failed_events_to_lookup = set(to_defer)
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sql = """SELECT prev_event_id, event_id, internal_metadata,
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rejections.event_id IS NOT NULL
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FROM event_edges
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INNER JOIN events USING (event_id)
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INNER JOIN event_json USING (event_id)
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LEFT JOIN rejections USING (event_id)
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WHERE
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NOT events.outlier
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AND
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"""
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clause, args = make_in_list_sql_clause(
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self.database_engine, "prev_event_id", to_check
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)
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txn.execute(sql + clause, list(args))
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for prev_event_id, event_id, metadata, rejected in txn:
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if event_id in graph:
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# Already handled this event previously, but we still
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# want to record the edge.
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graph[event_id].add(prev_event_id)
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continue
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graph[event_id] = {prev_event_id}
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soft_failed = db_to_json(metadata).get("soft_failed")
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if soft_failed or rejected:
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soft_failed_events_to_lookup.add(event_id)
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else:
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non_rejected_leaves.add(event_id)
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# We have a set of non-soft-failed descendants, so we recurse up
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# the graph to find all ancestors and add them to the set of event
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# IDs that we can delete from forward extremities table.
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to_delete = set()
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while non_rejected_leaves:
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event_id = non_rejected_leaves.pop()
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prev_event_ids = graph.get(event_id, set())
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non_rejected_leaves.update(prev_event_ids)
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to_delete.update(prev_event_ids)
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to_delete.intersection_update(original_set)
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deleted = self.db_pool.simple_delete_many_txn(
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txn=txn,
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table="event_forward_extremities",
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column="event_id",
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iterable=to_delete,
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keyvalues={},
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)
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logger.info(
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"Deleted %d forward extremities of %d checked, to clean up #5269",
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deleted,
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len(original_set),
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)
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if deleted:
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# We now need to invalidate the caches of these rooms
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rows = self.db_pool.simple_select_many_txn(
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txn,
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table="events",
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column="event_id",
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iterable=to_delete,
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keyvalues={},
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retcols=("room_id",),
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)
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room_ids = {row["room_id"] for row in rows}
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for room_id in room_ids:
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txn.call_after(
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self.get_latest_event_ids_in_room.invalidate, (room_id,)
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)
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self.db_pool.simple_delete_many_txn(
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txn=txn,
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table="_extremities_to_check",
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column="event_id",
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iterable=original_set,
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keyvalues={},
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)
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return len(original_set)
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num_handled = await self.db_pool.runInteraction(
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"_cleanup_extremities_bg_update", _cleanup_extremities_bg_update_txn
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)
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if not num_handled:
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await self.db_pool.updates._end_background_update(
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self.DELETE_SOFT_FAILED_EXTREMITIES
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)
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def _drop_table_txn(txn):
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txn.execute("DROP TABLE _extremities_to_check")
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await self.db_pool.runInteraction(
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"_cleanup_extremities_bg_update_drop_table", _drop_table_txn
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)
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return num_handled
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async def _redactions_received_ts(self, progress, batch_size):
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"""Handles filling out the `received_ts` column in redactions.
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"""
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last_event_id = progress.get("last_event_id", "")
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def _redactions_received_ts_txn(txn):
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# Fetch the set of event IDs that we want to update
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sql = """
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SELECT event_id FROM redactions
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WHERE event_id > ?
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ORDER BY event_id ASC
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LIMIT ?
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"""
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txn.execute(sql, (last_event_id, batch_size))
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rows = txn.fetchall()
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if not rows:
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return 0
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(upper_event_id,) = rows[-1]
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# Update the redactions with the received_ts.
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#
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# Note: Not all events have an associated received_ts, so we
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# fallback to using origin_server_ts. If we for some reason don't
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# have an origin_server_ts, lets just use the current timestamp.
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#
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# We don't want to leave it null, as then we'll never try and
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# censor those redactions.
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sql = """
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UPDATE redactions
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SET received_ts = (
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SELECT COALESCE(received_ts, origin_server_ts, ?) FROM events
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WHERE events.event_id = redactions.event_id
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)
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WHERE ? <= event_id AND event_id <= ?
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"""
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txn.execute(sql, (self._clock.time_msec(), last_event_id, upper_event_id))
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self.db_pool.updates._background_update_progress_txn(
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txn, "redactions_received_ts", {"last_event_id": upper_event_id}
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)
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return len(rows)
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count = await self.db_pool.runInteraction(
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"_redactions_received_ts", _redactions_received_ts_txn
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)
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if not count:
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await self.db_pool.updates._end_background_update("redactions_received_ts")
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return count
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async def _event_fix_redactions_bytes(self, progress, batch_size):
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"""Undoes hex encoded censored redacted event JSON.
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"""
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def _event_fix_redactions_bytes_txn(txn):
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# This update is quite fast due to new index.
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txn.execute(
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"""
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UPDATE event_json
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SET
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json = convert_from(json::bytea, 'utf8')
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FROM redactions
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WHERE
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redactions.have_censored
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AND event_json.event_id = redactions.redacts
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AND json NOT LIKE '{%';
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"""
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)
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txn.execute("DROP INDEX redactions_censored_redacts")
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await self.db_pool.runInteraction(
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"_event_fix_redactions_bytes", _event_fix_redactions_bytes_txn
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)
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await self.db_pool.updates._end_background_update("event_fix_redactions_bytes")
|
|
|
|
return 1
|
|
|
|
async def _event_store_labels(self, progress, batch_size):
|
|
"""Background update handler which will store labels for existing events."""
|
|
last_event_id = progress.get("last_event_id", "")
|
|
|
|
def _event_store_labels_txn(txn):
|
|
txn.execute(
|
|
"""
|
|
SELECT event_id, json FROM event_json
|
|
LEFT JOIN event_labels USING (event_id)
|
|
WHERE event_id > ? AND label IS NULL
|
|
ORDER BY event_id LIMIT ?
|
|
""",
|
|
(last_event_id, batch_size),
|
|
)
|
|
|
|
results = list(txn)
|
|
|
|
nbrows = 0
|
|
last_row_event_id = ""
|
|
for (event_id, event_json_raw) in results:
|
|
try:
|
|
event_json = db_to_json(event_json_raw)
|
|
|
|
self.db_pool.simple_insert_many_txn(
|
|
txn=txn,
|
|
table="event_labels",
|
|
values=[
|
|
{
|
|
"event_id": event_id,
|
|
"label": label,
|
|
"room_id": event_json["room_id"],
|
|
"topological_ordering": event_json["depth"],
|
|
}
|
|
for label in event_json["content"].get(
|
|
EventContentFields.LABELS, []
|
|
)
|
|
if isinstance(label, str)
|
|
],
|
|
)
|
|
except Exception as e:
|
|
logger.warning(
|
|
"Unable to load event %s (no labels will be imported): %s",
|
|
event_id,
|
|
e,
|
|
)
|
|
|
|
nbrows += 1
|
|
last_row_event_id = event_id
|
|
|
|
self.db_pool.updates._background_update_progress_txn(
|
|
txn, "event_store_labels", {"last_event_id": last_row_event_id}
|
|
)
|
|
|
|
return nbrows
|
|
|
|
num_rows = await self.db_pool.runInteraction(
|
|
desc="event_store_labels", func=_event_store_labels_txn
|
|
)
|
|
|
|
if not num_rows:
|
|
await self.db_pool.updates._end_background_update("event_store_labels")
|
|
|
|
return num_rows
|