1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
# -*- coding: utf-8 -*-
# Copyright 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 logging
from synapse.api.constants import EventTypes
from synapse.replication.tcp.streams.events import (
EventsStreamCurrentStateRow,
EventsStreamEventRow,
)
from synapse.storage.event_federation import EventFederationWorkerStore
from synapse.storage.event_push_actions import EventPushActionsWorkerStore
from synapse.storage.events_worker import EventsWorkerStore
from synapse.storage.relations import RelationsWorkerStore
from synapse.storage.roommember import RoomMemberWorkerStore
from synapse.storage.signatures import SignatureWorkerStore
from synapse.storage.state import StateGroupWorkerStore
from synapse.storage.stream import StreamWorkerStore
from synapse.storage.user_erasure_store import UserErasureWorkerStore
from ._base import BaseSlavedStore
from ._slaved_id_tracker import SlavedIdTracker
logger = logging.getLogger(__name__)
# So, um, we want to borrow a load of functions intended for reading from
# a DataStore, but we don't want to take functions that either write to the
# DataStore or are cached and don't have cache invalidation logic.
#
# Rather than write duplicate versions of those functions, or lift them to
# a common base class, we going to grab the underlying __func__ object from
# the method descriptor on the DataStore and chuck them into our class.
class SlavedEventStore(EventFederationWorkerStore,
RoomMemberWorkerStore,
EventPushActionsWorkerStore,
StreamWorkerStore,
StateGroupWorkerStore,
EventsWorkerStore,
SignatureWorkerStore,
UserErasureWorkerStore,
RelationsWorkerStore,
BaseSlavedStore):
def __init__(self, db_conn, hs):
self._stream_id_gen = SlavedIdTracker(
db_conn, "events", "stream_ordering",
)
self._backfill_id_gen = SlavedIdTracker(
db_conn, "events", "stream_ordering", step=-1
)
super(SlavedEventStore, self).__init__(db_conn, hs)
# Cached functions can't be accessed through a class instance so we need
# to reach inside the __dict__ to extract them.
def get_room_max_stream_ordering(self):
return self._stream_id_gen.get_current_token()
def get_room_min_stream_ordering(self):
return self._backfill_id_gen.get_current_token()
def stream_positions(self):
result = super(SlavedEventStore, self).stream_positions()
result["events"] = self._stream_id_gen.get_current_token()
result["backfill"] = -self._backfill_id_gen.get_current_token()
return result
def process_replication_rows(self, stream_name, token, rows):
if stream_name == "events":
self._stream_id_gen.advance(token)
for row in rows:
self._process_event_stream_row(token, row)
elif stream_name == "backfill":
self._backfill_id_gen.advance(-token)
for row in rows:
self.invalidate_caches_for_event(
-token, row.event_id, row.room_id, row.type, row.state_key,
row.redacts, row.relates_to,
backfilled=True,
)
return super(SlavedEventStore, self).process_replication_rows(
stream_name, token, rows
)
def _process_event_stream_row(self, token, row):
data = row.data
if row.type == EventsStreamEventRow.TypeId:
self.invalidate_caches_for_event(
token, data.event_id, data.room_id, data.type, data.state_key,
data.redacts, data.relates_to,
backfilled=False,
)
elif row.type == EventsStreamCurrentStateRow.TypeId:
if data.type == EventTypes.Member:
self.get_rooms_for_user_with_stream_ordering.invalidate(
(data.state_key, ),
)
else:
raise Exception("Unknown events stream row type %s" % (row.type, ))
def invalidate_caches_for_event(self, stream_ordering, event_id, room_id,
etype, state_key, redacts, relates_to,
backfilled):
self._invalidate_get_event_cache(event_id)
self.get_latest_event_ids_in_room.invalidate((room_id,))
self.get_unread_event_push_actions_by_room_for_user.invalidate_many(
(room_id,)
)
if not backfilled:
self._events_stream_cache.entity_has_changed(
room_id, stream_ordering
)
if redacts:
self._invalidate_get_event_cache(redacts)
if etype == EventTypes.Member:
self._membership_stream_cache.entity_has_changed(
state_key, stream_ordering
)
self.get_invited_rooms_for_user.invalidate((state_key,))
if relates_to:
self.get_relations_for_event.invalidate_many((relates_to,))
self.get_aggregation_groups_for_event.invalidate_many((relates_to,))
|
