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Diffstat (limited to 'synapse/storage/databases/main/receipts.py')
| -rw-r--r-- | synapse/storage/databases/main/receipts.py | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/receipts.py b/synapse/storage/databases/main/receipts.py new file mode 100644 index 0000000000..4a0d5a320e --- /dev/null +++ b/synapse/storage/databases/main/receipts.py @@ -0,0 +1,606 @@ +# -*- coding: utf-8 -*- +# Copyright 2014-2016 OpenMarket Ltd +# Copyright 2018 New Vector Ltd +# +# 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 abc +import logging +from typing import Any, Dict, List, Optional, Tuple + +from twisted.internet import defer + +from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause +from synapse.storage.database import DatabasePool +from synapse.storage.util.id_generators import StreamIdGenerator +from synapse.util import json_encoder +from synapse.util.async_helpers import ObservableDeferred +from synapse.util.caches.descriptors import cached, cachedList +from synapse.util.caches.stream_change_cache import StreamChangeCache + +logger = logging.getLogger(__name__) + + +class ReceiptsWorkerStore(SQLBaseStore): + """This is an abstract base class where subclasses must implement + `get_max_receipt_stream_id` which can be called in the initializer. + """ + + # This ABCMeta metaclass ensures that we cannot be instantiated without + # the abstract methods being implemented. + __metaclass__ = abc.ABCMeta + + def __init__(self, database: DatabasePool, db_conn, hs): + super(ReceiptsWorkerStore, self).__init__(database, db_conn, hs) + + self._receipts_stream_cache = StreamChangeCache( + "ReceiptsRoomChangeCache", self.get_max_receipt_stream_id() + ) + + @abc.abstractmethod + def get_max_receipt_stream_id(self): + """Get the current max stream ID for receipts stream + + Returns: + int + """ + raise NotImplementedError() + + @cached() + async def get_users_with_read_receipts_in_room(self, room_id): + receipts = await self.get_receipts_for_room(room_id, "m.read") + return {r["user_id"] for r in receipts} + + @cached(num_args=2) + async def get_receipts_for_room( + self, room_id: str, receipt_type: str + ) -> List[Dict[str, Any]]: + return await self.db_pool.simple_select_list( + table="receipts_linearized", + keyvalues={"room_id": room_id, "receipt_type": receipt_type}, + retcols=("user_id", "event_id"), + desc="get_receipts_for_room", + ) + + @cached(num_args=3) + async def get_last_receipt_event_id_for_user( + self, user_id: str, room_id: str, receipt_type: str + ) -> Optional[str]: + return await self.db_pool.simple_select_one_onecol( + table="receipts_linearized", + keyvalues={ + "room_id": room_id, + "receipt_type": receipt_type, + "user_id": user_id, + }, + retcol="event_id", + desc="get_own_receipt_for_user", + allow_none=True, + ) + + @cached(num_args=2) + async def get_receipts_for_user(self, user_id, receipt_type): + rows = await self.db_pool.simple_select_list( + table="receipts_linearized", + keyvalues={"user_id": user_id, "receipt_type": receipt_type}, + retcols=("room_id", "event_id"), + desc="get_receipts_for_user", + ) + + return {row["room_id"]: row["event_id"] for row in rows} + + async def get_receipts_for_user_with_orderings(self, user_id, receipt_type): + def f(txn): + sql = ( + "SELECT rl.room_id, rl.event_id," + " e.topological_ordering, e.stream_ordering" + " FROM receipts_linearized AS rl" + " INNER JOIN events AS e USING (room_id, event_id)" + " WHERE rl.room_id = e.room_id" + " AND rl.event_id = e.event_id" + " AND user_id = ?" + ) + txn.execute(sql, (user_id,)) + return txn.fetchall() + + rows = await self.db_pool.runInteraction( + "get_receipts_for_user_with_orderings", f + ) + return { + row[0]: { + "event_id": row[1], + "topological_ordering": row[2], + "stream_ordering": row[3], + } + for row in rows + } + + async def get_linearized_receipts_for_rooms( + self, room_ids: List[str], to_key: int, from_key: Optional[int] = None + ) -> List[dict]: + """Get receipts for multiple rooms for sending to clients. + + Args: + room_id: List of room_ids. + to_key: Max stream id to fetch receipts upto. + from_key: Min stream id to fetch receipts from. None fetches + from the start. + + Returns: + A list of receipts. + """ + room_ids = set(room_ids) + + if from_key is not None: + # Only ask the database about rooms where there have been new + # receipts added since `from_key` + room_ids = self._receipts_stream_cache.get_entities_changed( + room_ids, from_key + ) + + results = await self._get_linearized_receipts_for_rooms( + room_ids, to_key, from_key=from_key + ) + + return [ev for res in results.values() for ev in res] + + async def get_linearized_receipts_for_room( + self, room_id: str, to_key: int, from_key: Optional[int] = None + ) -> List[dict]: + """Get receipts for a single room for sending to clients. + + Args: + room_ids: The room id. + to_key: Max stream id to fetch receipts upto. + from_key: Min stream id to fetch receipts from. None fetches + from the start. + + Returns: + A list of receipts. + """ + if from_key is not None: + # Check the cache first to see if any new receipts have been added + # since`from_key`. If not we can no-op. + if not self._receipts_stream_cache.has_entity_changed(room_id, from_key): + return [] + + return await self._get_linearized_receipts_for_room(room_id, to_key, from_key) + + @cached(num_args=3, tree=True) + async def _get_linearized_receipts_for_room( + self, room_id: str, to_key: int, from_key: Optional[int] = None + ) -> List[dict]: + """See get_linearized_receipts_for_room + """ + + def f(txn): + if from_key: + sql = ( + "SELECT * FROM receipts_linearized WHERE" + " room_id = ? AND stream_id > ? AND stream_id <= ?" + ) + + txn.execute(sql, (room_id, from_key, to_key)) + else: + sql = ( + "SELECT * FROM receipts_linearized WHERE" + " room_id = ? AND stream_id <= ?" + ) + + txn.execute(sql, (room_id, to_key)) + + rows = self.db_pool.cursor_to_dict(txn) + + return rows + + rows = await self.db_pool.runInteraction("get_linearized_receipts_for_room", f) + + if not rows: + return [] + + content = {} + for row in rows: + content.setdefault(row["event_id"], {}).setdefault(row["receipt_type"], {})[ + row["user_id"] + ] = db_to_json(row["data"]) + + return [{"type": "m.receipt", "room_id": room_id, "content": content}] + + @cachedList( + cached_method_name="_get_linearized_receipts_for_room", + list_name="room_ids", + num_args=3, + ) + async def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None): + if not room_ids: + return {} + + def f(txn): + if from_key: + sql = """ + SELECT * FROM receipts_linearized WHERE + stream_id > ? AND stream_id <= ? AND + """ + clause, args = make_in_list_sql_clause( + self.database_engine, "room_id", room_ids + ) + + txn.execute(sql + clause, [from_key, to_key] + list(args)) + else: + sql = """ + SELECT * FROM receipts_linearized WHERE + stream_id <= ? AND + """ + + clause, args = make_in_list_sql_clause( + self.database_engine, "room_id", room_ids + ) + + txn.execute(sql + clause, [to_key] + list(args)) + + return self.db_pool.cursor_to_dict(txn) + + txn_results = await self.db_pool.runInteraction( + "_get_linearized_receipts_for_rooms", f + ) + + results = {} + for row in txn_results: + # We want a single event per room, since we want to batch the + # receipts by room, event and type. + room_event = results.setdefault( + row["room_id"], + {"type": "m.receipt", "room_id": row["room_id"], "content": {}}, + ) + + # The content is of the form: + # {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. } + event_entry = room_event["content"].setdefault(row["event_id"], {}) + receipt_type = event_entry.setdefault(row["receipt_type"], {}) + + receipt_type[row["user_id"]] = db_to_json(row["data"]) + + results = { + room_id: [results[room_id]] if room_id in results else [] + for room_id in room_ids + } + return results + + async def get_users_sent_receipts_between( + self, last_id: int, current_id: int + ) -> List[str]: + """Get all users who sent receipts between `last_id` exclusive and + `current_id` inclusive. + + Returns: + The list of users. + """ + + if last_id == current_id: + return defer.succeed([]) + + def _get_users_sent_receipts_between_txn(txn): + sql = """ + SELECT DISTINCT user_id FROM receipts_linearized + WHERE ? < stream_id AND stream_id <= ? + """ + txn.execute(sql, (last_id, current_id)) + + return [r[0] for r in txn] + + return await self.db_pool.runInteraction( + "get_users_sent_receipts_between", _get_users_sent_receipts_between_txn + ) + + async def get_all_updated_receipts( + self, instance_name: str, last_id: int, current_id: int, limit: int + ) -> Tuple[List[Tuple[int, list]], int, bool]: + """Get updates for receipts replication stream. + + Args: + instance_name: The writer we want to fetch updates from. Unused + here since there is only ever one writer. + last_id: The token to fetch updates from. Exclusive. + current_id: The token to fetch updates up to. Inclusive. + limit: The requested limit for the number of rows to return. The + function may return more or fewer rows. + + Returns: + A tuple consisting of: the updates, a token to use to fetch + subsequent updates, and whether we returned fewer rows than exists + between the requested tokens due to the limit. + + The token returned can be used in a subsequent call to this + function to get further updatees. + + The updates are a list of 2-tuples of stream ID and the row data + """ + + if last_id == current_id: + return [], current_id, False + + def get_all_updated_receipts_txn(txn): + sql = """ + SELECT stream_id, room_id, receipt_type, user_id, event_id, data + FROM receipts_linearized + WHERE ? < stream_id AND stream_id <= ? + ORDER BY stream_id ASC + LIMIT ? + """ + txn.execute(sql, (last_id, current_id, limit)) + + updates = [(r[0], r[1:5] + (db_to_json(r[5]),)) for r in txn] + + limited = False + upper_bound = current_id + + if len(updates) == limit: + limited = True + upper_bound = updates[-1][0] + + return updates, upper_bound, limited + + return await self.db_pool.runInteraction( + "get_all_updated_receipts", get_all_updated_receipts_txn + ) + + def _invalidate_get_users_with_receipts_in_room( + self, room_id: str, receipt_type: str, user_id: str + ): + if receipt_type != "m.read": + return + + # Returns either an ObservableDeferred or the raw result + res = self.get_users_with_read_receipts_in_room.cache.get( + room_id, None, update_metrics=False + ) + + # first handle the ObservableDeferred case + if isinstance(res, ObservableDeferred): + if res.has_called(): + res = res.get_result() + else: + res = None + + if res and user_id in res: + # We'd only be adding to the set, so no point invalidating if the + # user is already there + return + + self.get_users_with_read_receipts_in_room.invalidate((room_id,)) + + +class ReceiptsStore(ReceiptsWorkerStore): + def __init__(self, database: DatabasePool, db_conn, hs): + # We instantiate this first as the ReceiptsWorkerStore constructor + # needs to be able to call get_max_receipt_stream_id + self._receipts_id_gen = StreamIdGenerator( + db_conn, "receipts_linearized", "stream_id" + ) + + super(ReceiptsStore, self).__init__(database, db_conn, hs) + + def get_max_receipt_stream_id(self): + return self._receipts_id_gen.get_current_token() + + def insert_linearized_receipt_txn( + self, txn, room_id, receipt_type, user_id, event_id, data, stream_id + ): + """Inserts a read-receipt into the database if it's newer than the current RR + + Returns: int|None + None if the RR is older than the current RR + otherwise, the rx timestamp of the event that the RR corresponds to + (or 0 if the event is unknown) + """ + res = self.db_pool.simple_select_one_txn( + txn, + table="events", + retcols=["stream_ordering", "received_ts"], + keyvalues={"event_id": event_id}, + allow_none=True, + ) + + stream_ordering = int(res["stream_ordering"]) if res else None + rx_ts = res["received_ts"] if res else 0 + + # We don't want to clobber receipts for more recent events, so we + # have to compare orderings of existing receipts + if stream_ordering is not None: + sql = ( + "SELECT stream_ordering, event_id FROM events" + " INNER JOIN receipts_linearized as r USING (event_id, room_id)" + " WHERE r.room_id = ? AND r.receipt_type = ? AND r.user_id = ?" + ) + txn.execute(sql, (room_id, receipt_type, user_id)) + + for so, eid in txn: + if int(so) >= stream_ordering: + logger.debug( + "Ignoring new receipt for %s in favour of existing " + "one for later event %s", + event_id, + eid, + ) + return None + + txn.call_after(self.get_receipts_for_room.invalidate, (room_id, receipt_type)) + txn.call_after( + self._invalidate_get_users_with_receipts_in_room, + room_id, + receipt_type, + user_id, + ) + txn.call_after(self.get_receipts_for_user.invalidate, (user_id, receipt_type)) + # FIXME: This shouldn't invalidate the whole cache + txn.call_after( + self._get_linearized_receipts_for_room.invalidate_many, (room_id,) + ) + + txn.call_after( + self._receipts_stream_cache.entity_has_changed, room_id, stream_id + ) + + txn.call_after( + self.get_last_receipt_event_id_for_user.invalidate, + (user_id, room_id, receipt_type), + ) + + self.db_pool.simple_upsert_txn( + txn, + table="receipts_linearized", + keyvalues={ + "room_id": room_id, + "receipt_type": receipt_type, + "user_id": user_id, + }, + values={ + "stream_id": stream_id, + "event_id": event_id, + "data": json_encoder.encode(data), + }, + # receipts_linearized has a unique constraint on + # (user_id, room_id, receipt_type), so no need to lock + lock=False, + ) + + if receipt_type == "m.read" and stream_ordering is not None: + self._remove_old_push_actions_before_txn( + txn, room_id=room_id, user_id=user_id, stream_ordering=stream_ordering + ) + + return rx_ts + + async def insert_receipt( + self, + room_id: str, + receipt_type: str, + user_id: str, + event_ids: List[str], + data: dict, + ) -> Optional[Tuple[int, int]]: + """Insert a receipt, either from local client or remote server. + + Automatically does conversion between linearized and graph + representations. + """ + if not event_ids: + return None + + if len(event_ids) == 1: + linearized_event_id = event_ids[0] + else: + # we need to points in graph -> linearized form. + # TODO: Make this better. + def graph_to_linear(txn): + clause, args = make_in_list_sql_clause( + self.database_engine, "event_id", event_ids + ) + + sql = """ + SELECT event_id WHERE room_id = ? AND stream_ordering IN ( + SELECT max(stream_ordering) WHERE %s + ) + """ % ( + clause, + ) + + txn.execute(sql, [room_id] + list(args)) + rows = txn.fetchall() + if rows: + return rows[0][0] + else: + raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,)) + + linearized_event_id = await self.db_pool.runInteraction( + "insert_receipt_conv", graph_to_linear + ) + + with await self._receipts_id_gen.get_next() as stream_id: + event_ts = await self.db_pool.runInteraction( + "insert_linearized_receipt", + self.insert_linearized_receipt_txn, + room_id, + receipt_type, + user_id, + linearized_event_id, + data, + stream_id=stream_id, + ) + + if event_ts is None: + return None + + now = self._clock.time_msec() + logger.debug( + "RR for event %s in %s (%i ms old)", + linearized_event_id, + room_id, + now - event_ts, + ) + + await self.insert_graph_receipt(room_id, receipt_type, user_id, event_ids, data) + + max_persisted_id = self._receipts_id_gen.get_current_token() + + return stream_id, max_persisted_id + + async def insert_graph_receipt( + self, room_id, receipt_type, user_id, event_ids, data + ): + return await self.db_pool.runInteraction( + "insert_graph_receipt", + self.insert_graph_receipt_txn, + room_id, + receipt_type, + user_id, + event_ids, + data, + ) + + def insert_graph_receipt_txn( + self, txn, room_id, receipt_type, user_id, event_ids, data + ): + txn.call_after(self.get_receipts_for_room.invalidate, (room_id, receipt_type)) + txn.call_after( + self._invalidate_get_users_with_receipts_in_room, + room_id, + receipt_type, + user_id, + ) + txn.call_after(self.get_receipts_for_user.invalidate, (user_id, receipt_type)) + # FIXME: This shouldn't invalidate the whole cache + txn.call_after( + self._get_linearized_receipts_for_room.invalidate_many, (room_id,) + ) + + self.db_pool.simple_delete_txn( + txn, + table="receipts_graph", + keyvalues={ + "room_id": room_id, + "receipt_type": receipt_type, + "user_id": user_id, + }, + ) + self.db_pool.simple_insert_txn( + txn, + table="receipts_graph", + values={ + "room_id": room_id, + "receipt_type": receipt_type, + "user_id": user_id, + "event_ids": json_encoder.encode(event_ids), + "data": json_encoder.encode(data), + }, + ) |