407 lines
13 KiB
Python
407 lines
13 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket 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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from ._base import SQLBaseStore
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from synapse.util.caches.descriptors import cachedInlineCallbacks, cachedList
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from synapse.util.caches import cache_counter, caches_by_name
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from twisted.internet import defer
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from blist import sorteddict
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import logging
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import ujson as json
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logger = logging.getLogger(__name__)
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class ReceiptsStore(SQLBaseStore):
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def __init__(self, hs):
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super(ReceiptsStore, self).__init__(hs)
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self._receipts_stream_cache = _RoomStreamChangeCache()
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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:
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room_ids = yield self._receipts_stream_cache.get_rooms_changed(
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self, 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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defer.returnValue([ev for res in results.values() for ev in res])
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@cachedInlineCallbacks(num_args=3, max_entries=5000)
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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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list: A list of receipts.
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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(
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sql,
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(room_id, from_key, to_key)
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)
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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(
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sql,
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(room_id, to_key)
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)
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rows = self.cursor_to_dict(txn)
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return rows
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rows = yield self.runInteraction(
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"get_linearized_receipts_for_room", f
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)
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if not rows:
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defer.returnValue([])
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content = {}
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for row in rows:
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content.setdefault(
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row["event_id"], {}
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).setdefault(
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row["receipt_type"], {}
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)[row["user_id"]] = json.loads(row["data"])
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defer.returnValue([{
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"type": "m.receipt",
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"room_id": room_id,
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"content": content,
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}])
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@cachedList(cache=get_linearized_receipts_for_room.cache, list_name="room_ids",
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num_args=3, inlineCallbacks=True)
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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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defer.returnValue({})
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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 IN (%s) AND stream_id > ? AND stream_id <= ?"
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) % (
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",".join(["?"] * len(room_ids))
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)
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args = list(room_ids)
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args.extend([from_key, to_key])
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txn.execute(sql, args)
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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 IN (%s) AND stream_id <= ?"
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) % (
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",".join(["?"] * len(room_ids))
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)
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args = list(room_ids)
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args.append(to_key)
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txn.execute(sql, args)
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return self.cursor_to_dict(txn)
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txn_results = yield self.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(row["room_id"], {
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"type": "m.receipt",
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"room_id": row["room_id"],
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"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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defer.returnValue(results)
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def get_max_receipt_stream_id(self):
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return self._receipts_id_gen.get_max_token(self)
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@cachedInlineCallbacks()
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def get_graph_receipts_for_room(self, room_id):
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"""Get receipts for sending to remote servers.
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"""
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rows = yield self._simple_select_list(
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table="receipts_graph",
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keyvalues={"room_id": room_id},
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retcols=["receipt_type", "user_id", "event_id"],
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desc="get_linearized_receipts_for_room",
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)
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result = {}
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for row in rows:
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result.setdefault(
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row["user_id"], {}
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).setdefault(
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row["receipt_type"], []
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).append(row["event_id"])
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defer.returnValue(result)
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def insert_linearized_receipt_txn(self, txn, room_id, receipt_type,
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user_id, event_id, data, stream_id):
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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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sql = (
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"SELECT topological_ordering, 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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results = txn.fetchall()
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if results:
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res = self._simple_select_one_txn(
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txn,
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table="events",
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retcols=["topological_ordering", "stream_ordering"],
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keyvalues={"event_id": event_id},
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)
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topological_ordering = int(res["topological_ordering"])
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stream_ordering = int(res["stream_ordering"])
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for to, so, _ in results:
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if int(to) > topological_ordering:
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return False
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elif int(to) == topological_ordering and int(so) >= stream_ordering:
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return False
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self._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._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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return True
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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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query = (
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"SELECT event_id WHERE room_id = ? AND stream_ordering IN ("
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" SELECT max(stream_ordering) WHERE event_id IN (%s)"
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")"
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) % (",".join(["?"] * len(event_ids)))
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txn.execute(query, [room_id] + event_ids)
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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.runInteraction(
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"insert_receipt_conv", graph_to_linear
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)
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stream_id_manager = yield self._receipts_id_gen.get_next(self)
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with stream_id_manager as stream_id:
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yield self._receipts_stream_cache.room_has_changed(
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self, room_id, stream_id
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)
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have_persisted = yield self.runInteraction(
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"insert_linearized_receipt",
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self.insert_linearized_receipt_txn,
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room_id, receipt_type, user_id, 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 not have_persisted:
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defer.returnValue(None)
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yield self.insert_graph_receipt(
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room_id, receipt_type, user_id, event_ids, data
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)
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max_persisted_id = yield self._stream_id_gen.get_max_token(self)
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defer.returnValue((stream_id, max_persisted_id))
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def insert_graph_receipt(self, room_id, receipt_type, user_id, event_ids,
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data):
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return self.runInteraction(
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"insert_graph_receipt",
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self.insert_graph_receipt_txn,
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room_id, receipt_type, user_id, event_ids, data
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)
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def insert_graph_receipt_txn(self, txn, room_id, receipt_type,
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user_id, event_ids, data):
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self._simple_delete_txn(
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txn,
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table="receipts_graph",
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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._simple_insert_txn(
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txn,
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table="receipts_graph",
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values={
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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_ids": json.dumps(event_ids),
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"data": json.dumps(data),
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}
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)
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class _RoomStreamChangeCache(object):
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"""Keeps track of the stream_id of the latest change in rooms.
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Given a list of rooms and stream key, it will give a subset of rooms that
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may have changed since that key. If the key is too old then the cache
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will simply return all rooms.
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"""
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def __init__(self, size_of_cache=10000):
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self._size_of_cache = size_of_cache
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self._room_to_key = {}
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self._cache = sorteddict()
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self._earliest_key = None
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self.name = "ReceiptsRoomChangeCache"
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caches_by_name[self.name] = self._cache
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@defer.inlineCallbacks
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def get_rooms_changed(self, store, room_ids, key):
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"""Returns subset of room ids that have had new receipts since the
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given key. If the key is too old it will just return the given list.
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"""
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if key > (yield self._get_earliest_key(store)):
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keys = self._cache.keys()
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i = keys.bisect_right(key)
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result = set(
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self._cache[k] for k in keys[i:]
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).intersection(room_ids)
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cache_counter.inc_hits(self.name)
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else:
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result = room_ids
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cache_counter.inc_misses(self.name)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def room_has_changed(self, store, room_id, key):
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"""Informs the cache that the room has been changed at the given key.
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"""
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if key > (yield self._get_earliest_key(store)):
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old_key = self._room_to_key.get(room_id, None)
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if old_key:
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key = max(key, old_key)
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self._cache.pop(old_key, None)
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self._cache[key] = room_id
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while len(self._cache) > self._size_of_cache:
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k, r = self._cache.popitem()
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self._earliest_key = max(k, self._earliest_key)
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self._room_to_key.pop(r, None)
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@defer.inlineCallbacks
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def _get_earliest_key(self, store):
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if self._earliest_key is None:
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self._earliest_key = yield store.get_max_receipt_stream_id()
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self._earliest_key = int(self._earliest_key)
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defer.returnValue(self._earliest_key)
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