diff --git a/synapse/storage/databases/main/events_bg_updates.py b/synapse/storage/databases/main/events_bg_updates.py
new file mode 100644
index 0000000000..35a0e09e3c
--- /dev/null
+++ b/synapse/storage/databases/main/events_bg_updates.py
@@ -0,0 +1,585 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 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 twisted.internet import defer
+
+from synapse.api.constants import EventContentFields
+from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
+from synapse.storage.database import DatabasePool
+
+logger = logging.getLogger(__name__)
+
+
+class EventsBackgroundUpdatesStore(SQLBaseStore):
+
+ EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts"
+ EVENT_FIELDS_SENDER_URL_UPDATE_NAME = "event_fields_sender_url"
+ DELETE_SOFT_FAILED_EXTREMITIES = "delete_soft_failed_extremities"
+
+ def __init__(self, database: DatabasePool, db_conn, hs):
+ super(EventsBackgroundUpdatesStore, self).__init__(database, db_conn, hs)
+
+ self.db_pool.updates.register_background_update_handler(
+ self.EVENT_ORIGIN_SERVER_TS_NAME, self._background_reindex_origin_server_ts
+ )
+ self.db_pool.updates.register_background_update_handler(
+ self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME,
+ self._background_reindex_fields_sender,
+ )
+
+ self.db_pool.updates.register_background_index_update(
+ "event_contains_url_index",
+ index_name="event_contains_url_index",
+ table="events",
+ columns=["room_id", "topological_ordering", "stream_ordering"],
+ where_clause="contains_url = true AND outlier = false",
+ )
+
+ # an event_id index on event_search is useful for the purge_history
+ # api. Plus it means we get to enforce some integrity with a UNIQUE
+ # clause
+ self.db_pool.updates.register_background_index_update(
+ "event_search_event_id_idx",
+ index_name="event_search_event_id_idx",
+ table="event_search",
+ columns=["event_id"],
+ unique=True,
+ psql_only=True,
+ )
+
+ self.db_pool.updates.register_background_update_handler(
+ self.DELETE_SOFT_FAILED_EXTREMITIES, self._cleanup_extremities_bg_update
+ )
+
+ self.db_pool.updates.register_background_update_handler(
+ "redactions_received_ts", self._redactions_received_ts
+ )
+
+ # This index gets deleted in `event_fix_redactions_bytes` update
+ self.db_pool.updates.register_background_index_update(
+ "event_fix_redactions_bytes_create_index",
+ index_name="redactions_censored_redacts",
+ table="redactions",
+ columns=["redacts"],
+ where_clause="have_censored",
+ )
+
+ self.db_pool.updates.register_background_update_handler(
+ "event_fix_redactions_bytes", self._event_fix_redactions_bytes
+ )
+
+ self.db_pool.updates.register_background_update_handler(
+ "event_store_labels", self._event_store_labels
+ )
+
+ self.db_pool.updates.register_background_index_update(
+ "redactions_have_censored_ts_idx",
+ index_name="redactions_have_censored_ts",
+ table="redactions",
+ columns=["received_ts"],
+ where_clause="NOT have_censored",
+ )
+
+ @defer.inlineCallbacks
+ def _background_reindex_fields_sender(self, progress, batch_size):
+ target_min_stream_id = progress["target_min_stream_id_inclusive"]
+ max_stream_id = progress["max_stream_id_exclusive"]
+ rows_inserted = progress.get("rows_inserted", 0)
+
+ INSERT_CLUMP_SIZE = 1000
+
+ def reindex_txn(txn):
+ sql = (
+ "SELECT stream_ordering, event_id, json FROM events"
+ " INNER JOIN event_json USING (event_id)"
+ " WHERE ? <= stream_ordering AND stream_ordering < ?"
+ " ORDER BY stream_ordering DESC"
+ " LIMIT ?"
+ )
+
+ txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
+
+ rows = txn.fetchall()
+ if not rows:
+ return 0
+
+ min_stream_id = rows[-1][0]
+
+ update_rows = []
+ for row in rows:
+ try:
+ event_id = row[1]
+ event_json = db_to_json(row[2])
+ sender = event_json["sender"]
+ content = event_json["content"]
+
+ contains_url = "url" in content
+ if contains_url:
+ contains_url &= isinstance(content["url"], str)
+ except (KeyError, AttributeError):
+ # If the event is missing a necessary field then
+ # skip over it.
+ continue
+
+ update_rows.append((sender, contains_url, event_id))
+
+ sql = "UPDATE events SET sender = ?, contains_url = ? WHERE event_id = ?"
+
+ for index in range(0, len(update_rows), INSERT_CLUMP_SIZE):
+ clump = update_rows[index : index + INSERT_CLUMP_SIZE]
+ txn.executemany(sql, clump)
+
+ progress = {
+ "target_min_stream_id_inclusive": target_min_stream_id,
+ "max_stream_id_exclusive": min_stream_id,
+ "rows_inserted": rows_inserted + len(rows),
+ }
+
+ self.db_pool.updates._background_update_progress_txn(
+ txn, self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME, progress
+ )
+
+ return len(rows)
+
+ result = yield self.db_pool.runInteraction(
+ self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME, reindex_txn
+ )
+
+ if not result:
+ yield self.db_pool.updates._end_background_update(
+ self.EVENT_FIELDS_SENDER_URL_UPDATE_NAME
+ )
+
+ return result
+
+ @defer.inlineCallbacks
+ def _background_reindex_origin_server_ts(self, progress, batch_size):
+ target_min_stream_id = progress["target_min_stream_id_inclusive"]
+ max_stream_id = progress["max_stream_id_exclusive"]
+ rows_inserted = progress.get("rows_inserted", 0)
+
+ INSERT_CLUMP_SIZE = 1000
+
+ def reindex_search_txn(txn):
+ sql = (
+ "SELECT stream_ordering, event_id FROM events"
+ " WHERE ? <= stream_ordering AND stream_ordering < ?"
+ " ORDER BY stream_ordering DESC"
+ " LIMIT ?"
+ )
+
+ txn.execute(sql, (target_min_stream_id, max_stream_id, batch_size))
+
+ rows = txn.fetchall()
+ if not rows:
+ return 0
+
+ min_stream_id = rows[-1][0]
+ event_ids = [row[1] for row in rows]
+
+ rows_to_update = []
+
+ chunks = [event_ids[i : i + 100] for i in range(0, len(event_ids), 100)]
+ for chunk in chunks:
+ ev_rows = self.db_pool.simple_select_many_txn(
+ txn,
+ table="event_json",
+ column="event_id",
+ iterable=chunk,
+ retcols=["event_id", "json"],
+ keyvalues={},
+ )
+
+ for row in ev_rows:
+ event_id = row["event_id"]
+ event_json = db_to_json(row["json"])
+ try:
+ origin_server_ts = event_json["origin_server_ts"]
+ except (KeyError, AttributeError):
+ # If the event is missing a necessary field then
+ # skip over it.
+ continue
+
+ rows_to_update.append((origin_server_ts, event_id))
+
+ sql = "UPDATE events SET origin_server_ts = ? WHERE event_id = ?"
+
+ for index in range(0, len(rows_to_update), INSERT_CLUMP_SIZE):
+ clump = rows_to_update[index : index + INSERT_CLUMP_SIZE]
+ txn.executemany(sql, clump)
+
+ progress = {
+ "target_min_stream_id_inclusive": target_min_stream_id,
+ "max_stream_id_exclusive": min_stream_id,
+ "rows_inserted": rows_inserted + len(rows_to_update),
+ }
+
+ self.db_pool.updates._background_update_progress_txn(
+ txn, self.EVENT_ORIGIN_SERVER_TS_NAME, progress
+ )
+
+ return len(rows_to_update)
+
+ result = yield self.db_pool.runInteraction(
+ self.EVENT_ORIGIN_SERVER_TS_NAME, reindex_search_txn
+ )
+
+ if not result:
+ yield self.db_pool.updates._end_background_update(
+ self.EVENT_ORIGIN_SERVER_TS_NAME
+ )
+
+ return result
+
+ @defer.inlineCallbacks
+ def _cleanup_extremities_bg_update(self, progress, batch_size):
+ """Background update to clean out extremities that should have been
+ deleted previously.
+
+ Mainly used to deal with the aftermath of #5269.
+ """
+
+ # This works by first copying all existing forward extremities into the
+ # `_extremities_to_check` table at start up, and then checking each
+ # event in that table whether we have any descendants that are not
+ # soft-failed/rejected. If that is the case then we delete that event
+ # from the forward extremities table.
+ #
+ # For efficiency, we do this in batches by recursively pulling out all
+ # descendants of a batch until we find the non soft-failed/rejected
+ # events, i.e. the set of descendants whose chain of prev events back
+ # to the batch of extremities are all soft-failed or rejected.
+ # Typically, we won't find any such events as extremities will rarely
+ # have any descendants, but if they do then we should delete those
+ # extremities.
+
+ def _cleanup_extremities_bg_update_txn(txn):
+ # The set of extremity event IDs that we're checking this round
+ original_set = set()
+
+ # A dict[str, set[str]] of event ID to their prev events.
+ graph = {}
+
+ # The set of descendants of the original set that are not rejected
+ # nor soft-failed. Ancestors of these events should be removed
+ # from the forward extremities table.
+ non_rejected_leaves = set()
+
+ # Set of event IDs that have been soft failed, and for which we
+ # should check if they have descendants which haven't been soft
+ # failed.
+ soft_failed_events_to_lookup = set()
+
+ # First, we get `batch_size` events from the table, pulling out
+ # their successor events, if any, and the successor events'
+ # rejection status.
+ txn.execute(
+ """SELECT prev_event_id, event_id, internal_metadata,
+ rejections.event_id IS NOT NULL, events.outlier
+ FROM (
+ SELECT event_id AS prev_event_id
+ FROM _extremities_to_check
+ LIMIT ?
+ ) AS f
+ LEFT JOIN event_edges USING (prev_event_id)
+ LEFT JOIN events USING (event_id)
+ LEFT JOIN event_json USING (event_id)
+ LEFT JOIN rejections USING (event_id)
+ """,
+ (batch_size,),
+ )
+
+ for prev_event_id, event_id, metadata, rejected, outlier in txn:
+ original_set.add(prev_event_id)
+
+ if not event_id or outlier:
+ # Common case where the forward extremity doesn't have any
+ # descendants.
+ continue
+
+ graph.setdefault(event_id, set()).add(prev_event_id)
+
+ soft_failed = False
+ if metadata:
+ soft_failed = db_to_json(metadata).get("soft_failed")
+
+ if soft_failed or rejected:
+ soft_failed_events_to_lookup.add(event_id)
+ else:
+ non_rejected_leaves.add(event_id)
+
+ # Now we recursively check all the soft-failed descendants we
+ # found above in the same way, until we have nothing left to
+ # check.
+ while soft_failed_events_to_lookup:
+ # We only want to do 100 at a time, so we split given list
+ # into two.
+ batch = list(soft_failed_events_to_lookup)
+ to_check, to_defer = batch[:100], batch[100:]
+ soft_failed_events_to_lookup = set(to_defer)
+
+ sql = """SELECT prev_event_id, event_id, internal_metadata,
+ rejections.event_id IS NOT NULL
+ FROM event_edges
+ INNER JOIN events USING (event_id)
+ INNER JOIN event_json USING (event_id)
+ LEFT JOIN rejections USING (event_id)
+ WHERE
+ NOT events.outlier
+ AND
+ """
+ clause, args = make_in_list_sql_clause(
+ self.database_engine, "prev_event_id", to_check
+ )
+ txn.execute(sql + clause, list(args))
+
+ for prev_event_id, event_id, metadata, rejected in txn:
+ if event_id in graph:
+ # Already handled this event previously, but we still
+ # want to record the edge.
+ graph[event_id].add(prev_event_id)
+ continue
+
+ graph[event_id] = {prev_event_id}
+
+ soft_failed = db_to_json(metadata).get("soft_failed")
+ if soft_failed or rejected:
+ soft_failed_events_to_lookup.add(event_id)
+ else:
+ non_rejected_leaves.add(event_id)
+
+ # We have a set of non-soft-failed descendants, so we recurse up
+ # the graph to find all ancestors and add them to the set of event
+ # IDs that we can delete from forward extremities table.
+ to_delete = set()
+ while non_rejected_leaves:
+ event_id = non_rejected_leaves.pop()
+ prev_event_ids = graph.get(event_id, set())
+ non_rejected_leaves.update(prev_event_ids)
+ to_delete.update(prev_event_ids)
+
+ to_delete.intersection_update(original_set)
+
+ deleted = self.db_pool.simple_delete_many_txn(
+ txn=txn,
+ table="event_forward_extremities",
+ column="event_id",
+ iterable=to_delete,
+ keyvalues={},
+ )
+
+ logger.info(
+ "Deleted %d forward extremities of %d checked, to clean up #5269",
+ deleted,
+ len(original_set),
+ )
+
+ if deleted:
+ # We now need to invalidate the caches of these rooms
+ rows = self.db_pool.simple_select_many_txn(
+ txn,
+ table="events",
+ column="event_id",
+ iterable=to_delete,
+ keyvalues={},
+ retcols=("room_id",),
+ )
+ room_ids = {row["room_id"] for row in rows}
+ for room_id in room_ids:
+ txn.call_after(
+ self.get_latest_event_ids_in_room.invalidate, (room_id,)
+ )
+
+ self.db_pool.simple_delete_many_txn(
+ txn=txn,
+ table="_extremities_to_check",
+ column="event_id",
+ iterable=original_set,
+ keyvalues={},
+ )
+
+ return len(original_set)
+
+ num_handled = yield self.db_pool.runInteraction(
+ "_cleanup_extremities_bg_update", _cleanup_extremities_bg_update_txn
+ )
+
+ if not num_handled:
+ yield self.db_pool.updates._end_background_update(
+ self.DELETE_SOFT_FAILED_EXTREMITIES
+ )
+
+ def _drop_table_txn(txn):
+ txn.execute("DROP TABLE _extremities_to_check")
+
+ yield self.db_pool.runInteraction(
+ "_cleanup_extremities_bg_update_drop_table", _drop_table_txn
+ )
+
+ return num_handled
+
+ @defer.inlineCallbacks
+ def _redactions_received_ts(self, progress, batch_size):
+ """Handles filling out the `received_ts` column in redactions.
+ """
+ last_event_id = progress.get("last_event_id", "")
+
+ def _redactions_received_ts_txn(txn):
+ # Fetch the set of event IDs that we want to update
+ sql = """
+ SELECT event_id FROM redactions
+ WHERE event_id > ?
+ ORDER BY event_id ASC
+ LIMIT ?
+ """
+
+ txn.execute(sql, (last_event_id, batch_size))
+
+ rows = txn.fetchall()
+ if not rows:
+ return 0
+
+ (upper_event_id,) = rows[-1]
+
+ # Update the redactions with the received_ts.
+ #
+ # Note: Not all events have an associated received_ts, so we
+ # fallback to using origin_server_ts. If we for some reason don't
+ # have an origin_server_ts, lets just use the current timestamp.
+ #
+ # We don't want to leave it null, as then we'll never try and
+ # censor those redactions.
+ sql = """
+ UPDATE redactions
+ SET received_ts = (
+ SELECT COALESCE(received_ts, origin_server_ts, ?) FROM events
+ WHERE events.event_id = redactions.event_id
+ )
+ WHERE ? <= event_id AND event_id <= ?
+ """
+
+ txn.execute(sql, (self._clock.time_msec(), last_event_id, upper_event_id))
+
+ self.db_pool.updates._background_update_progress_txn(
+ txn, "redactions_received_ts", {"last_event_id": upper_event_id}
+ )
+
+ return len(rows)
+
+ count = yield self.db_pool.runInteraction(
+ "_redactions_received_ts", _redactions_received_ts_txn
+ )
+
+ if not count:
+ yield self.db_pool.updates._end_background_update("redactions_received_ts")
+
+ return count
+
+ @defer.inlineCallbacks
+ def _event_fix_redactions_bytes(self, progress, batch_size):
+ """Undoes hex encoded censored redacted event JSON.
+ """
+
+ def _event_fix_redactions_bytes_txn(txn):
+ # This update is quite fast due to new index.
+ txn.execute(
+ """
+ UPDATE event_json
+ SET
+ json = convert_from(json::bytea, 'utf8')
+ FROM redactions
+ WHERE
+ redactions.have_censored
+ AND event_json.event_id = redactions.redacts
+ AND json NOT LIKE '{%';
+ """
+ )
+
+ txn.execute("DROP INDEX redactions_censored_redacts")
+
+ yield self.db_pool.runInteraction(
+ "_event_fix_redactions_bytes", _event_fix_redactions_bytes_txn
+ )
+
+ yield self.db_pool.updates._end_background_update("event_fix_redactions_bytes")
+
+ return 1
+
+ @defer.inlineCallbacks
+ 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 = yield self.db_pool.runInteraction(
+ desc="event_store_labels", func=_event_store_labels_txn
+ )
+
+ if not num_rows:
+ yield self.db_pool.updates._end_background_update("event_store_labels")
+
+ return num_rows
|
