540 lines
18 KiB
Python
540 lines
18 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2018 New Vector Ltd
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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 abc
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import logging
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from canonicaljson import json
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from twisted.internet import defer
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from synapse.storage._base import SQLBaseStore, make_in_list_sql_clause
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from synapse.storage.database import Database
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from synapse.storage.util.id_generators import StreamIdGenerator
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from synapse.util.caches.descriptors import cached, cachedInlineCallbacks, cachedList
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from synapse.util.caches.stream_change_cache import StreamChangeCache
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logger = logging.getLogger(__name__)
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class ReceiptsWorkerStore(SQLBaseStore):
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"""This is an abstract base class where subclasses must implement
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`get_max_receipt_stream_id` which can be called in the initializer.
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"""
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# This ABCMeta metaclass ensures that we cannot be instantiated without
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# the abstract methods being implemented.
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__metaclass__ = abc.ABCMeta
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def __init__(self, database: Database, db_conn, hs):
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super(ReceiptsWorkerStore, self).__init__(database, db_conn, hs)
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self._receipts_stream_cache = StreamChangeCache(
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"ReceiptsRoomChangeCache", self.get_max_receipt_stream_id()
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)
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@abc.abstractmethod
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def get_max_receipt_stream_id(self):
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"""Get the current max stream ID for receipts stream
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Returns:
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int
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"""
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raise NotImplementedError()
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@cachedInlineCallbacks()
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def get_users_with_read_receipts_in_room(self, room_id):
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receipts = yield self.get_receipts_for_room(room_id, "m.read")
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return {r["user_id"] for r in receipts}
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@cached(num_args=2)
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def get_receipts_for_room(self, room_id, receipt_type):
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return self.db.simple_select_list(
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table="receipts_linearized",
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keyvalues={"room_id": room_id, "receipt_type": receipt_type},
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retcols=("user_id", "event_id"),
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desc="get_receipts_for_room",
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)
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@cached(num_args=3)
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def get_last_receipt_event_id_for_user(self, user_id, room_id, receipt_type):
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return self.db.simple_select_one_onecol(
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table="receipts_linearized",
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keyvalues={
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"room_id": room_id,
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"receipt_type": receipt_type,
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"user_id": user_id,
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},
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retcol="event_id",
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desc="get_own_receipt_for_user",
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allow_none=True,
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)
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@cachedInlineCallbacks(num_args=2)
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def get_receipts_for_user(self, user_id, receipt_type):
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rows = yield self.db.simple_select_list(
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table="receipts_linearized",
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keyvalues={"user_id": user_id, "receipt_type": receipt_type},
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retcols=("room_id", "event_id"),
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desc="get_receipts_for_user",
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)
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return {row["room_id"]: row["event_id"] for row in rows}
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@defer.inlineCallbacks
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def get_receipts_for_user_with_orderings(self, user_id, receipt_type):
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def f(txn):
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sql = (
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"SELECT rl.room_id, rl.event_id,"
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" e.topological_ordering, e.stream_ordering"
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" FROM receipts_linearized AS rl"
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" INNER JOIN events AS e USING (room_id, event_id)"
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" WHERE rl.room_id = e.room_id"
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" AND rl.event_id = e.event_id"
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" AND user_id = ?"
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)
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txn.execute(sql, (user_id,))
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return txn.fetchall()
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rows = yield self.db.runInteraction("get_receipts_for_user_with_orderings", f)
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return {
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row[0]: {
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"event_id": row[1],
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"topological_ordering": row[2],
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"stream_ordering": row[3],
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}
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for row in rows
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}
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@defer.inlineCallbacks
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def get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
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"""Get receipts for multiple rooms for sending to clients.
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Args:
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room_ids (list): List of room_ids.
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to_key (int): Max stream id to fetch receipts upto.
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from_key (int): Min stream id to fetch receipts from. None fetches
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from the start.
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Returns:
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list: A list of receipts.
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"""
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room_ids = set(room_ids)
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if from_key is not None:
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# Only ask the database about rooms where there have been new
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# receipts added since `from_key`
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room_ids = yield self._receipts_stream_cache.get_entities_changed(
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room_ids, from_key
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)
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results = yield self._get_linearized_receipts_for_rooms(
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room_ids, to_key, from_key=from_key
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)
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return [ev for res in results.values() for ev in res]
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def get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
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"""Get receipts for a single room for sending to clients.
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Args:
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room_ids (str): The room id.
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to_key (int): Max stream id to fetch receipts upto.
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from_key (int): Min stream id to fetch receipts from. None fetches
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from the start.
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Returns:
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Deferred[list]: A list of receipts.
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"""
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if from_key is not None:
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# Check the cache first to see if any new receipts have been added
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# since`from_key`. If not we can no-op.
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if not self._receipts_stream_cache.has_entity_changed(room_id, from_key):
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defer.succeed([])
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return self._get_linearized_receipts_for_room(room_id, to_key, from_key)
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@cachedInlineCallbacks(num_args=3, tree=True)
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def _get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
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"""See get_linearized_receipts_for_room
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"""
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def f(txn):
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if from_key:
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sql = (
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"SELECT * FROM receipts_linearized WHERE"
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" room_id = ? AND stream_id > ? AND stream_id <= ?"
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)
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txn.execute(sql, (room_id, from_key, to_key))
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else:
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sql = (
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"SELECT * FROM receipts_linearized WHERE"
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" room_id = ? AND stream_id <= ?"
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)
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txn.execute(sql, (room_id, to_key))
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rows = self.db.cursor_to_dict(txn)
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return rows
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rows = yield self.db.runInteraction("get_linearized_receipts_for_room", f)
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if not rows:
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return []
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content = {}
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for row in rows:
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content.setdefault(row["event_id"], {}).setdefault(row["receipt_type"], {})[
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row["user_id"]
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] = json.loads(row["data"])
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return [{"type": "m.receipt", "room_id": room_id, "content": content}]
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@cachedList(
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cached_method_name="_get_linearized_receipts_for_room",
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list_name="room_ids",
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num_args=3,
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inlineCallbacks=True,
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)
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def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
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if not room_ids:
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return {}
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def f(txn):
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if from_key:
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sql = """
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SELECT * FROM receipts_linearized WHERE
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stream_id > ? AND stream_id <= ? AND
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"""
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clause, args = make_in_list_sql_clause(
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self.database_engine, "room_id", room_ids
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)
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txn.execute(sql + clause, [from_key, to_key] + list(args))
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else:
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sql = """
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SELECT * FROM receipts_linearized WHERE
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stream_id <= ? AND
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"""
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clause, args = make_in_list_sql_clause(
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self.database_engine, "room_id", room_ids
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)
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txn.execute(sql + clause, [to_key] + list(args))
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return self.db.cursor_to_dict(txn)
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txn_results = yield self.db.runInteraction(
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"_get_linearized_receipts_for_rooms", f
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)
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results = {}
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for row in txn_results:
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# We want a single event per room, since we want to batch the
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# receipts by room, event and type.
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room_event = results.setdefault(
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row["room_id"],
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{"type": "m.receipt", "room_id": row["room_id"], "content": {}},
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)
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# The content is of the form:
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# {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
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event_entry = room_event["content"].setdefault(row["event_id"], {})
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receipt_type = event_entry.setdefault(row["receipt_type"], {})
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receipt_type[row["user_id"]] = json.loads(row["data"])
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results = {
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room_id: [results[room_id]] if room_id in results else []
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for room_id in room_ids
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}
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return results
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def get_all_updated_receipts(self, last_id, current_id, limit=None):
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if last_id == current_id:
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return defer.succeed([])
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def get_all_updated_receipts_txn(txn):
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sql = (
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"SELECT stream_id, room_id, receipt_type, user_id, event_id, data"
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" FROM receipts_linearized"
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" WHERE ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC"
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)
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args = [last_id, current_id]
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if limit is not None:
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sql += " LIMIT ?"
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args.append(limit)
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txn.execute(sql, args)
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return [r[0:5] + (json.loads(r[5]),) for r in txn]
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return self.db.runInteraction(
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"get_all_updated_receipts", get_all_updated_receipts_txn
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)
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def _invalidate_get_users_with_receipts_in_room(
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self, room_id, receipt_type, user_id
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):
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if receipt_type != "m.read":
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return
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# Returns either an ObservableDeferred or the raw result
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res = self.get_users_with_read_receipts_in_room.cache.get(
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room_id, None, update_metrics=False
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)
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# first handle the Deferred case
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if isinstance(res, defer.Deferred):
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if res.called:
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res = res.result
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else:
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res = None
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if res and user_id in res:
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# We'd only be adding to the set, so no point invalidating if the
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# user is already there
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return
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self.get_users_with_read_receipts_in_room.invalidate((room_id,))
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class ReceiptsStore(ReceiptsWorkerStore):
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def __init__(self, database: Database, db_conn, hs):
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# We instantiate this first as the ReceiptsWorkerStore constructor
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# needs to be able to call get_max_receipt_stream_id
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self._receipts_id_gen = StreamIdGenerator(
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db_conn, "receipts_linearized", "stream_id"
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)
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super(ReceiptsStore, self).__init__(database, db_conn, hs)
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def get_max_receipt_stream_id(self):
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return self._receipts_id_gen.get_current_token()
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def insert_linearized_receipt_txn(
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self, txn, room_id, receipt_type, user_id, event_id, data, stream_id
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):
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"""Inserts a read-receipt into the database if it's newer than the current RR
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Returns: int|None
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None if the RR is older than the current RR
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otherwise, the rx timestamp of the event that the RR corresponds to
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(or 0 if the event is unknown)
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"""
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res = self.db.simple_select_one_txn(
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txn,
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table="events",
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retcols=["stream_ordering", "received_ts"],
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keyvalues={"event_id": event_id},
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allow_none=True,
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)
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stream_ordering = int(res["stream_ordering"]) if res else None
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rx_ts = res["received_ts"] if res else 0
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# We don't want to clobber receipts for more recent events, so we
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# have to compare orderings of existing receipts
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if stream_ordering is not None:
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sql = (
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"SELECT stream_ordering, event_id FROM events"
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" INNER JOIN receipts_linearized as r USING (event_id, room_id)"
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" WHERE r.room_id = ? AND r.receipt_type = ? AND r.user_id = ?"
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)
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txn.execute(sql, (room_id, receipt_type, user_id))
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for so, eid in txn:
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if int(so) >= stream_ordering:
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logger.debug(
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"Ignoring new receipt for %s in favour of existing "
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"one for later event %s",
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event_id,
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eid,
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)
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return None
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txn.call_after(self.get_receipts_for_room.invalidate, (room_id, receipt_type))
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txn.call_after(
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self._invalidate_get_users_with_receipts_in_room,
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room_id,
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receipt_type,
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user_id,
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)
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txn.call_after(self.get_receipts_for_user.invalidate, (user_id, receipt_type))
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# FIXME: This shouldn't invalidate the whole cache
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txn.call_after(
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self._get_linearized_receipts_for_room.invalidate_many, (room_id,)
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)
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txn.call_after(
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self._receipts_stream_cache.entity_has_changed, room_id, stream_id
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)
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txn.call_after(
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self.get_last_receipt_event_id_for_user.invalidate,
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(user_id, room_id, receipt_type),
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)
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self.db.simple_delete_txn(
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txn,
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table="receipts_linearized",
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keyvalues={
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"room_id": room_id,
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"receipt_type": receipt_type,
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"user_id": user_id,
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},
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)
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self.db.simple_insert_txn(
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txn,
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table="receipts_linearized",
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values={
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"stream_id": stream_id,
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"room_id": room_id,
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"receipt_type": receipt_type,
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"user_id": user_id,
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"event_id": event_id,
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"data": json.dumps(data),
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},
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)
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if receipt_type == "m.read" and stream_ordering is not None:
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self._remove_old_push_actions_before_txn(
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txn, room_id=room_id, user_id=user_id, stream_ordering=stream_ordering
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)
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return rx_ts
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@defer.inlineCallbacks
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def insert_receipt(self, room_id, receipt_type, user_id, event_ids, data):
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"""Insert a receipt, either from local client or remote server.
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Automatically does conversion between linearized and graph
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representations.
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"""
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if not event_ids:
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return
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if len(event_ids) == 1:
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linearized_event_id = event_ids[0]
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else:
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# we need to points in graph -> linearized form.
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# TODO: Make this better.
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def graph_to_linear(txn):
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clause, args = make_in_list_sql_clause(
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self.database_engine, "event_id", event_ids
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)
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sql = """
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SELECT event_id WHERE room_id = ? AND stream_ordering IN (
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SELECT max(stream_ordering) WHERE %s
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)
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""" % (
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clause,
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)
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txn.execute(sql, [room_id] + list(args))
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rows = txn.fetchall()
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if rows:
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return rows[0][0]
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else:
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raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))
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linearized_event_id = yield self.db.runInteraction(
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"insert_receipt_conv", graph_to_linear
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)
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stream_id_manager = self._receipts_id_gen.get_next()
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with stream_id_manager as stream_id:
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event_ts = yield self.db.runInteraction(
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"insert_linearized_receipt",
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self.insert_linearized_receipt_txn,
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room_id,
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receipt_type,
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user_id,
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linearized_event_id,
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data,
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stream_id=stream_id,
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)
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if event_ts is None:
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return None
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now = self._clock.time_msec()
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logger.debug(
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"RR for event %s in %s (%i ms old)",
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linearized_event_id,
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room_id,
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now - event_ts,
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)
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yield self.insert_graph_receipt(room_id, receipt_type, user_id, event_ids, data)
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max_persisted_id = self._receipts_id_gen.get_current_token()
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return stream_id, max_persisted_id
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def insert_graph_receipt(self, room_id, receipt_type, user_id, event_ids, data):
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return self.db.runInteraction(
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"insert_graph_receipt",
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self.insert_graph_receipt_txn,
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room_id,
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receipt_type,
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user_id,
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event_ids,
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data,
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)
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def insert_graph_receipt_txn(
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self, txn, room_id, receipt_type, user_id, event_ids, data
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):
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txn.call_after(self.get_receipts_for_room.invalidate, (room_id, receipt_type))
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txn.call_after(
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self._invalidate_get_users_with_receipts_in_room,
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room_id,
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|
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.simple_delete_txn(
|
|
txn,
|
|
table="receipts_graph",
|
|
keyvalues={
|
|
"room_id": room_id,
|
|
"receipt_type": receipt_type,
|
|
"user_id": user_id,
|
|
},
|
|
)
|
|
self.db.simple_insert_txn(
|
|
txn,
|
|
table="receipts_graph",
|
|
values={
|
|
"room_id": room_id,
|
|
"receipt_type": receipt_type,
|
|
"user_id": user_id,
|
|
"event_ids": json.dumps(event_ids),
|
|
"data": json.dumps(data),
|
|
},
|
|
)
|