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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
# -*- coding: utf-8 -*-
# Copyright 2016 OpenMarket 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.
from ._base import BaseSlavedStore
from ._slaved_id_tracker import SlavedIdTracker
from synapse.api.constants import EventTypes
from synapse.events import FrozenEvent
from synapse.storage import DataStore
from synapse.storage.roommember import RoomMemberStore
from synapse.storage.event_federation import EventFederationStore
from synapse.storage.event_push_actions import EventPushActionsStore
from synapse.storage.state import StateStore
from synapse.storage.stream import StreamStore
from synapse.util.caches.stream_change_cache import StreamChangeCache
import ujson as json
# 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(BaseSlavedStore):
def __init__(self, db_conn, hs):
super(SlavedEventStore, self).__init__(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
)
events_max = self._stream_id_gen.get_current_token()
event_cache_prefill, min_event_val = self._get_cache_dict(
db_conn, "events",
entity_column="room_id",
stream_column="stream_ordering",
max_value=events_max,
)
self._events_stream_cache = StreamChangeCache(
"EventsRoomStreamChangeCache", min_event_val,
prefilled_cache=event_cache_prefill,
)
self._membership_stream_cache = StreamChangeCache(
"MembershipStreamChangeCache", events_max,
)
# Cached functions can't be accessed through a class instance so we need
# to reach inside the __dict__ to extract them.
get_rooms_for_user = RoomMemberStore.__dict__["get_rooms_for_user"]
get_users_in_room = RoomMemberStore.__dict__["get_users_in_room"]
get_latest_event_ids_in_room = EventFederationStore.__dict__[
"get_latest_event_ids_in_room"
]
_get_current_state_for_key = StateStore.__dict__[
"_get_current_state_for_key"
]
get_invited_rooms_for_user = RoomMemberStore.__dict__[
"get_invited_rooms_for_user"
]
get_unread_event_push_actions_by_room_for_user = (
EventPushActionsStore.__dict__["get_unread_event_push_actions_by_room_for_user"]
)
_get_state_group_for_events = (
StateStore.__dict__["_get_state_group_for_events"]
)
_get_state_group_for_event = (
StateStore.__dict__["_get_state_group_for_event"]
)
_get_state_groups_from_groups = (
StateStore.__dict__["_get_state_groups_from_groups"]
)
_get_state_group_from_group = (
StateStore.__dict__["_get_state_group_from_group"]
)
get_recent_event_ids_for_room = (
StreamStore.__dict__["get_recent_event_ids_for_room"]
)
get_unread_push_actions_for_user_in_range_for_http = (
DataStore.get_unread_push_actions_for_user_in_range_for_http.__func__
)
get_unread_push_actions_for_user_in_range_for_email = (
DataStore.get_unread_push_actions_for_user_in_range_for_email.__func__
)
get_push_action_users_in_range = (
DataStore.get_push_action_users_in_range.__func__
)
get_event = DataStore.get_event.__func__
get_events = DataStore.get_events.__func__
get_current_state = DataStore.get_current_state.__func__
get_current_state_for_key = DataStore.get_current_state_for_key.__func__
get_rooms_for_user_where_membership_is = (
DataStore.get_rooms_for_user_where_membership_is.__func__
)
get_membership_changes_for_user = (
DataStore.get_membership_changes_for_user.__func__
)
get_room_events_max_id = DataStore.get_room_events_max_id.__func__
get_room_events_stream_for_room = (
DataStore.get_room_events_stream_for_room.__func__
)
get_events_around = DataStore.get_events_around.__func__
get_state_for_event = DataStore.get_state_for_event.__func__
get_state_for_events = DataStore.get_state_for_events.__func__
get_state_groups = DataStore.get_state_groups.__func__
get_state_groups_ids = DataStore.get_state_groups_ids.__func__
get_state_ids_for_event = DataStore.get_state_ids_for_event.__func__
get_state_ids_for_events = DataStore.get_state_ids_for_events.__func__
get_recent_events_for_room = DataStore.get_recent_events_for_room.__func__
get_room_events_stream_for_rooms = (
DataStore.get_room_events_stream_for_rooms.__func__
)
is_host_joined = DataStore.is_host_joined.__func__
_is_host_joined = RoomMemberStore.__dict__["_is_host_joined"]
get_stream_token_for_event = DataStore.get_stream_token_for_event.__func__
_set_before_and_after = staticmethod(DataStore._set_before_and_after)
_get_events = DataStore._get_events.__func__
_get_events_from_cache = DataStore._get_events_from_cache.__func__
_invalidate_get_event_cache = DataStore._invalidate_get_event_cache.__func__
_enqueue_events = DataStore._enqueue_events.__func__
_do_fetch = DataStore._do_fetch.__func__
_fetch_event_rows = DataStore._fetch_event_rows.__func__
_get_event_from_row = DataStore._get_event_from_row.__func__
_get_rooms_for_user_where_membership_is_txn = (
DataStore._get_rooms_for_user_where_membership_is_txn.__func__
)
_get_members_rows_txn = DataStore._get_members_rows_txn.__func__
_get_state_for_groups = DataStore._get_state_for_groups.__func__
_get_all_state_from_cache = DataStore._get_all_state_from_cache.__func__
_get_events_around_txn = DataStore._get_events_around_txn.__func__
_get_some_state_from_cache = DataStore._get_some_state_from_cache.__func__
get_backfill_events = DataStore.get_backfill_events.__func__
_get_backfill_events = DataStore._get_backfill_events.__func__
get_missing_events = DataStore.get_missing_events.__func__
_get_missing_events = DataStore._get_missing_events.__func__
get_auth_chain = DataStore.get_auth_chain.__func__
get_auth_chain_ids = DataStore.get_auth_chain_ids.__func__
_get_auth_chain_ids_txn = DataStore._get_auth_chain_ids_txn.__func__
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(self, result):
state_resets = set(
r[0] for r in result.get("state_resets", {"rows": []})["rows"]
)
stream = result.get("events")
if stream:
self._stream_id_gen.advance(int(stream["position"]))
for row in stream["rows"]:
self._process_replication_row(
row, backfilled=False, state_resets=state_resets
)
stream = result.get("backfill")
if stream:
self._backfill_id_gen.advance(-int(stream["position"]))
for row in stream["rows"]:
self._process_replication_row(
row, backfilled=True, state_resets=state_resets
)
stream = result.get("forward_ex_outliers")
if stream:
self._stream_id_gen.advance(int(stream["position"]))
for row in stream["rows"]:
event_id = row[1]
self._invalidate_get_event_cache(event_id)
stream = result.get("backward_ex_outliers")
if stream:
self._backfill_id_gen.advance(-int(stream["position"]))
for row in stream["rows"]:
event_id = row[1]
self._invalidate_get_event_cache(event_id)
return super(SlavedEventStore, self).process_replication(result)
def _process_replication_row(self, row, backfilled, state_resets):
position = row[0]
internal = json.loads(row[1])
event_json = json.loads(row[2])
event = FrozenEvent(event_json, internal_metadata_dict=internal)
self.invalidate_caches_for_event(
event, backfilled, reset_state=position in state_resets
)
def invalidate_caches_for_event(self, event, backfilled, reset_state):
if reset_state:
self._get_current_state_for_key.invalidate_all()
self.get_rooms_for_user.invalidate_all()
self.get_users_in_room.invalidate((event.room_id,))
# self.get_joined_hosts_for_room.invalidate((event.room_id,))
self._invalidate_get_event_cache(event.event_id)
self.get_latest_event_ids_in_room.invalidate((event.room_id,))
self.get_unread_event_push_actions_by_room_for_user.invalidate_many(
(event.room_id,)
)
if not backfilled:
self._events_stream_cache.entity_has_changed(
event.room_id, event.internal_metadata.stream_ordering
)
# self.get_unread_event_push_actions_by_room_for_user.invalidate_many(
# (event.room_id,)
# )
if event.type == EventTypes.Redaction:
self._invalidate_get_event_cache(event.redacts)
if event.type == EventTypes.Member:
self.get_rooms_for_user.invalidate((event.state_key,))
# self.get_joined_hosts_for_room.invalidate((event.room_id,))
self.get_users_in_room.invalidate((event.room_id,))
self._membership_stream_cache.entity_has_changed(
event.state_key, event.internal_metadata.stream_ordering
)
self.get_invited_rooms_for_user.invalidate((event.state_key,))
if not event.is_state():
return
if backfilled:
return
if (not event.internal_metadata.is_invite_from_remote()
and event.internal_metadata.is_outlier()):
return
self._get_current_state_for_key.invalidate((
event.room_id, event.type, event.state_key
))
|
