diff options
Diffstat (limited to 'synapse/storage')
| -rw-r--r-- | synapse/storage/databases/main/cache.py | 1 | ||||
| -rw-r--r-- | synapse/storage/databases/main/events.py | 38 | ||||
| -rw-r--r-- | synapse/storage/databases/main/relations.py | 166 | ||||
| -rw-r--r-- | synapse/storage/schema/main/delta/73/09threads_table.sql | 30 |
4 files changed, 231 insertions, 4 deletions
diff --git a/synapse/storage/databases/main/cache.py b/synapse/storage/databases/main/cache.py index a9f25a5904..0ce3156c9c 100644 --- a/synapse/storage/databases/main/cache.py +++ b/synapse/storage/databases/main/cache.py @@ -259,6 +259,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore): self._attempt_to_invalidate_cache("get_applicable_edit", (relates_to,)) self._attempt_to_invalidate_cache("get_thread_summary", (relates_to,)) self._attempt_to_invalidate_cache("get_thread_participated", (relates_to,)) + self._attempt_to_invalidate_cache("get_threads", (room_id,)) async def invalidate_cache_and_stream( self, cache_name: str, keys: Tuple[Any, ...] diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py index 060fe71454..6698cbf664 100644 --- a/synapse/storage/databases/main/events.py +++ b/synapse/storage/databases/main/events.py @@ -35,7 +35,7 @@ import attr from prometheus_client import Counter import synapse.metrics -from synapse.api.constants import EventContentFields, EventTypes +from synapse.api.constants import EventContentFields, EventTypes, RelationTypes from synapse.api.errors import Codes, SynapseError from synapse.api.room_versions import RoomVersions from synapse.events import EventBase, relation_from_event @@ -1616,7 +1616,7 @@ class PersistEventsStore: ) # Remove from relations table. - self._handle_redact_relations(txn, event.redacts) + self._handle_redact_relations(txn, event.room_id, event.redacts) # Update the event_forward_extremities, event_backward_extremities and # event_edges tables. @@ -1866,6 +1866,34 @@ class PersistEventsStore: }, ) + if relation.rel_type == RelationTypes.THREAD: + # Upsert into the threads table, but only overwrite the value if the + # new event is of a later topological order OR if the topological + # ordering is equal, but the stream ordering is later. + sql = """ + INSERT INTO threads (room_id, thread_id, latest_event_id, topological_ordering, stream_ordering) + VALUES (?, ?, ?, ?, ?) + ON CONFLICT (room_id, thread_id) + DO UPDATE SET + latest_event_id = excluded.latest_event_id, + topological_ordering = excluded.topological_ordering, + stream_ordering = excluded.stream_ordering + WHERE + threads.topological_ordering <= excluded.topological_ordering AND + threads.stream_ordering < excluded.stream_ordering + """ + + txn.execute( + sql, + ( + event.room_id, + relation.parent_id, + event.event_id, + event.depth, + event.internal_metadata.stream_ordering, + ), + ) + def _handle_insertion_event( self, txn: LoggingTransaction, event: EventBase ) -> None: @@ -1989,13 +2017,14 @@ class PersistEventsStore: txn.execute(sql, (batch_id,)) def _handle_redact_relations( - self, txn: LoggingTransaction, redacted_event_id: str + self, txn: LoggingTransaction, room_id: str, redacted_event_id: str ) -> None: """Handles receiving a redaction and checking whether the redacted event has any relations which must be removed from the database. Args: txn + room_id: The room ID of the event that was redacted. redacted_event_id: The event that was redacted. """ @@ -2024,6 +2053,9 @@ class PersistEventsStore: self.store._invalidate_cache_and_stream( txn, self.store.get_thread_participated, (redacted_relates_to,) ) + self.store._invalidate_cache_and_stream( + txn, self.store.get_threads, (room_id,) + ) self.db_pool.simple_delete_txn( txn, table="event_relations", keyvalues={"event_id": redacted_event_id} diff --git a/synapse/storage/databases/main/relations.py b/synapse/storage/databases/main/relations.py index e7fbf950e6..ac9b96ab44 100644 --- a/synapse/storage/databases/main/relations.py +++ b/synapse/storage/databases/main/relations.py @@ -14,6 +14,7 @@ import logging from typing import ( + TYPE_CHECKING, Collection, Dict, FrozenSet, @@ -29,18 +30,47 @@ from typing import ( import attr from synapse.api.constants import MAIN_TIMELINE, RelationTypes +from synapse.api.errors import SynapseError from synapse.events import EventBase from synapse.storage._base import SQLBaseStore -from synapse.storage.database import LoggingTransaction, make_in_list_sql_clause +from synapse.storage.database import ( + DatabasePool, + LoggingDatabaseConnection, + LoggingTransaction, + make_in_list_sql_clause, +) from synapse.storage.databases.main.stream import generate_pagination_where_clause from synapse.storage.engines import PostgresEngine from synapse.types import JsonDict, RoomStreamToken, StreamKeyType, StreamToken from synapse.util.caches.descriptors import cached, cachedList +if TYPE_CHECKING: + from synapse.server import HomeServer + logger = logging.getLogger(__name__) @attr.s(slots=True, frozen=True, auto_attribs=True) +class ThreadsNextBatch: + topological_ordering: int + stream_ordering: int + + def __str__(self) -> str: + return f"{self.topological_ordering}_{self.stream_ordering}" + + @classmethod + def from_string(cls, string: str) -> "ThreadsNextBatch": + """ + Creates a ThreadsNextBatch from its textual representation. + """ + try: + keys = (int(s) for s in string.split("_")) + return cls(*keys) + except Exception: + raise SynapseError(400, "Invalid threads token") + + +@attr.s(slots=True, frozen=True, auto_attribs=True) class _RelatedEvent: """ Contains enough information about a related event in order to properly filter @@ -56,6 +86,76 @@ class _RelatedEvent: class RelationsWorkerStore(SQLBaseStore): + def __init__( + self, + database: DatabasePool, + db_conn: LoggingDatabaseConnection, + hs: "HomeServer", + ): + super().__init__(database, db_conn, hs) + + self.db_pool.updates.register_background_update_handler( + "threads_backfill", self._backfill_threads + ) + + async def _backfill_threads(self, progress: JsonDict, batch_size: int) -> int: + """Backfill the threads table.""" + + def threads_backfill_txn(txn: LoggingTransaction) -> int: + last_thread_id = progress.get("last_thread_id", "") + + # Get the latest event in each thread by topo ordering / stream ordering. + # + # Note that the MAX(event_id) is needed to abide by the rules of group by, + # but doesn't actually do anything since there should only be a single event + # ID per topo/stream ordering pair. + sql = f""" + SELECT room_id, relates_to_id, MAX(topological_ordering), MAX(stream_ordering), MAX(event_id) + FROM event_relations + INNER JOIN events USING (event_id) + WHERE + relates_to_id > ? AND + relation_type = '{RelationTypes.THREAD}' + GROUP BY room_id, relates_to_id + ORDER BY relates_to_id + LIMIT ? + """ + txn.execute(sql, (last_thread_id, batch_size)) + + # No more rows to process. + rows = txn.fetchall() + if not rows: + return 0 + + # Insert the rows into the threads table. If a matching thread already exists, + # assume it is from a newer event. + sql = """ + INSERT INTO threads (room_id, thread_id, topological_ordering, stream_ordering, latest_event_id) + VALUES %s + ON CONFLICT (room_id, thread_id) + DO NOTHING + """ + if isinstance(txn.database_engine, PostgresEngine): + txn.execute_values(sql % ("?",), rows, fetch=False) + else: + txn.execute_batch(sql % ("?, ?, ?, ?, ?",), rows) + + # Mark the progress. + self.db_pool.updates._background_update_progress_txn( + txn, "threads_backfill", {"last_thread_id": rows[-1][1]} + ) + + return txn.rowcount + + result = await self.db_pool.runInteraction( + "threads_backfill", threads_backfill_txn + ) + + if not result: + await self.db_pool.updates._end_background_update("threads_backfill") + + return result + @cached(uncached_args=("event",), tree=True) async def get_relations_for_event( self, @@ -776,6 +876,70 @@ class RelationsWorkerStore(SQLBaseStore): "get_if_user_has_annotated_event", _get_if_user_has_annotated_event ) + @cached(tree=True) + async def get_threads( + self, + room_id: str, + limit: int = 5, + from_token: Optional[ThreadsNextBatch] = None, + ) -> Tuple[List[str], Optional[ThreadsNextBatch]]: + """Get a list of thread IDs, ordered by topological ordering of their + latest reply. + + Args: + room_id: The room the event belongs to. + limit: Only fetch the most recent `limit` threads. + from_token: Fetch rows from a previous next_batch, or from the start if None. + + Returns: + A tuple of: + A list of thread root event IDs. + + The next_batch, if one exists. + """ + # Generate the pagination clause, if necessary. + # + # Find any threads where the latest reply is equal / before the last + # thread's topo ordering and earlier in stream ordering. + pagination_clause = "" + pagination_args: tuple = () + if from_token: + pagination_clause = "AND topological_ordering <= ? AND stream_ordering < ?" + pagination_args = ( + from_token.topological_ordering, + from_token.stream_ordering, + ) + + sql = f""" + SELECT thread_id, topological_ordering, stream_ordering + FROM threads + WHERE + room_id = ? + {pagination_clause} + ORDER BY topological_ordering DESC, stream_ordering DESC + LIMIT ? + """ + + def _get_threads_txn( + txn: LoggingTransaction, + ) -> Tuple[List[str], Optional[ThreadsNextBatch]]: + txn.execute(sql, (room_id, *pagination_args, limit + 1)) + + rows = cast(List[Tuple[str, int, int]], txn.fetchall()) + thread_ids = [r[0] for r in rows] + + # If there are more events, generate the next pagination key from the + # last thread which will be returned. + next_token = None + if len(thread_ids) > limit: + last_topo_id = rows[-2][1] + last_stream_id = rows[-2][2] + next_token = ThreadsNextBatch(last_topo_id, last_stream_id) + + return thread_ids[:limit], next_token + + return await self.db_pool.runInteraction("get_threads", _get_threads_txn) + @cached() async def get_thread_id(self, event_id: str) -> str: """ diff --git a/synapse/storage/schema/main/delta/73/09threads_table.sql b/synapse/storage/schema/main/delta/73/09threads_table.sql new file mode 100644 index 0000000000..aa7c5e9a2e --- /dev/null +++ b/synapse/storage/schema/main/delta/73/09threads_table.sql @@ -0,0 +1,30 @@ +/* Copyright 2022 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. + */ + +CREATE TABLE threads ( + room_id TEXT NOT NULL, + -- The event ID of the root event in the thread. + thread_id TEXT NOT NULL, + -- The latest event ID and corresponding topo / stream ordering. + latest_event_id TEXT NOT NULL, + topological_ordering BIGINT NOT NULL, + stream_ordering BIGINT NOT NULL, + CONSTRAINT threads_uniqueness UNIQUE (room_id, thread_id) +); + +CREATE INDEX threads_ordering_idx ON threads(room_id, topological_ordering, stream_ordering); + +INSERT INTO background_updates (ordering, update_name, progress_json) VALUES + (7309, 'threads_backfill', '{}'); |