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d58b1ffe94
cursor_to_dict can be surprisinglh expensive for large result sets, so lets only call it when we need to.
271 lines
11 KiB
Python
271 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 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 BaseSlavedStore
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from ._slaved_id_tracker import SlavedIdTracker
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from synapse.api.constants import EventTypes
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from synapse.storage import DataStore
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from synapse.storage.roommember import RoomMemberStore
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from synapse.storage.event_federation import EventFederationStore
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from synapse.storage.event_push_actions import EventPushActionsStore
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from synapse.storage.state import StateStore
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from synapse.storage.stream import StreamStore
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from synapse.util.caches.stream_change_cache import StreamChangeCache
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import logging
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logger = logging.getLogger(__name__)
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# So, um, we want to borrow a load of functions intended for reading from
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# a DataStore, but we don't want to take functions that either write to the
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# DataStore or are cached and don't have cache invalidation logic.
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#
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# Rather than write duplicate versions of those functions, or lift them to
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# a common base class, we going to grab the underlying __func__ object from
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# the method descriptor on the DataStore and chuck them into our class.
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class SlavedEventStore(BaseSlavedStore):
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def __init__(self, db_conn, hs):
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super(SlavedEventStore, self).__init__(db_conn, hs)
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self._stream_id_gen = SlavedIdTracker(
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db_conn, "events", "stream_ordering",
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)
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self._backfill_id_gen = SlavedIdTracker(
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db_conn, "events", "stream_ordering", step=-1
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)
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events_max = self._stream_id_gen.get_current_token()
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event_cache_prefill, min_event_val = self._get_cache_dict(
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db_conn, "events",
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entity_column="room_id",
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stream_column="stream_ordering",
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max_value=events_max,
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)
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self._events_stream_cache = StreamChangeCache(
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"EventsRoomStreamChangeCache", min_event_val,
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prefilled_cache=event_cache_prefill,
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)
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self._membership_stream_cache = StreamChangeCache(
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"MembershipStreamChangeCache", events_max,
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)
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self.stream_ordering_month_ago = 0
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self._stream_order_on_start = self.get_room_max_stream_ordering()
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# Cached functions can't be accessed through a class instance so we need
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# to reach inside the __dict__ to extract them.
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get_rooms_for_user = RoomMemberStore.__dict__["get_rooms_for_user"]
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get_users_in_room = RoomMemberStore.__dict__["get_users_in_room"]
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get_users_who_share_room_with_user = (
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RoomMemberStore.__dict__["get_users_who_share_room_with_user"]
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)
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get_latest_event_ids_in_room = EventFederationStore.__dict__[
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"get_latest_event_ids_in_room"
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]
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get_invited_rooms_for_user = RoomMemberStore.__dict__[
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"get_invited_rooms_for_user"
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]
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get_unread_event_push_actions_by_room_for_user = (
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EventPushActionsStore.__dict__["get_unread_event_push_actions_by_room_for_user"]
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)
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_get_unread_counts_by_receipt_txn = (
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DataStore._get_unread_counts_by_receipt_txn.__func__
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)
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_get_unread_counts_by_pos_txn = (
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DataStore._get_unread_counts_by_pos_txn.__func__
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)
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_get_state_group_for_events = (
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StateStore.__dict__["_get_state_group_for_events"]
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)
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_get_state_group_for_event = (
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StateStore.__dict__["_get_state_group_for_event"]
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)
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_get_state_groups_from_groups = (
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StateStore.__dict__["_get_state_groups_from_groups"]
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)
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_get_state_groups_from_groups_txn = (
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DataStore._get_state_groups_from_groups_txn.__func__
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)
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_get_state_group_from_group = (
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StateStore.__dict__["_get_state_group_from_group"]
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)
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get_recent_event_ids_for_room = (
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StreamStore.__dict__["get_recent_event_ids_for_room"]
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)
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get_current_state_ids = (
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StateStore.__dict__["get_current_state_ids"]
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)
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has_room_changed_since = DataStore.has_room_changed_since.__func__
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get_unread_push_actions_for_user_in_range_for_http = (
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DataStore.get_unread_push_actions_for_user_in_range_for_http.__func__
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)
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get_unread_push_actions_for_user_in_range_for_email = (
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DataStore.get_unread_push_actions_for_user_in_range_for_email.__func__
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)
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get_push_action_users_in_range = (
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DataStore.get_push_action_users_in_range.__func__
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)
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get_event = DataStore.get_event.__func__
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get_events = DataStore.get_events.__func__
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get_rooms_for_user_where_membership_is = (
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DataStore.get_rooms_for_user_where_membership_is.__func__
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)
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get_membership_changes_for_user = (
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DataStore.get_membership_changes_for_user.__func__
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)
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get_room_events_max_id = DataStore.get_room_events_max_id.__func__
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get_room_events_stream_for_room = (
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DataStore.get_room_events_stream_for_room.__func__
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)
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get_events_around = DataStore.get_events_around.__func__
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get_state_for_event = DataStore.get_state_for_event.__func__
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get_state_for_events = DataStore.get_state_for_events.__func__
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get_state_groups = DataStore.get_state_groups.__func__
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get_state_groups_ids = DataStore.get_state_groups_ids.__func__
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get_state_ids_for_event = DataStore.get_state_ids_for_event.__func__
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get_state_ids_for_events = DataStore.get_state_ids_for_events.__func__
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get_joined_users_from_state = DataStore.get_joined_users_from_state.__func__
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get_joined_users_from_context = DataStore.get_joined_users_from_context.__func__
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_get_joined_users_from_context = (
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RoomMemberStore.__dict__["_get_joined_users_from_context"]
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)
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get_recent_events_for_room = DataStore.get_recent_events_for_room.__func__
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get_room_events_stream_for_rooms = (
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DataStore.get_room_events_stream_for_rooms.__func__
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)
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is_host_joined = DataStore.is_host_joined.__func__
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_is_host_joined = RoomMemberStore.__dict__["_is_host_joined"]
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get_stream_token_for_event = DataStore.get_stream_token_for_event.__func__
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_set_before_and_after = staticmethod(DataStore._set_before_and_after)
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_get_events = DataStore._get_events.__func__
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_get_events_from_cache = DataStore._get_events_from_cache.__func__
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_invalidate_get_event_cache = DataStore._invalidate_get_event_cache.__func__
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_enqueue_events = DataStore._enqueue_events.__func__
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_do_fetch = DataStore._do_fetch.__func__
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_fetch_event_rows = DataStore._fetch_event_rows.__func__
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_get_event_from_row = DataStore._get_event_from_row.__func__
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_get_rooms_for_user_where_membership_is_txn = (
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DataStore._get_rooms_for_user_where_membership_is_txn.__func__
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)
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_get_state_for_groups = DataStore._get_state_for_groups.__func__
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_get_all_state_from_cache = DataStore._get_all_state_from_cache.__func__
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_get_events_around_txn = DataStore._get_events_around_txn.__func__
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_get_some_state_from_cache = DataStore._get_some_state_from_cache.__func__
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get_backfill_events = DataStore.get_backfill_events.__func__
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_get_backfill_events = DataStore._get_backfill_events.__func__
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get_missing_events = DataStore.get_missing_events.__func__
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_get_missing_events = DataStore._get_missing_events.__func__
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get_auth_chain = DataStore.get_auth_chain.__func__
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get_auth_chain_ids = DataStore.get_auth_chain_ids.__func__
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_get_auth_chain_ids_txn = DataStore._get_auth_chain_ids_txn.__func__
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get_room_max_stream_ordering = DataStore.get_room_max_stream_ordering.__func__
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get_forward_extremeties_for_room = (
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DataStore.get_forward_extremeties_for_room.__func__
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)
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_get_forward_extremeties_for_room = (
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EventFederationStore.__dict__["_get_forward_extremeties_for_room"]
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)
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get_all_new_events_stream = DataStore.get_all_new_events_stream.__func__
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get_federation_out_pos = DataStore.get_federation_out_pos.__func__
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update_federation_out_pos = DataStore.update_federation_out_pos.__func__
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def stream_positions(self):
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result = super(SlavedEventStore, self).stream_positions()
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result["events"] = self._stream_id_gen.get_current_token()
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result["backfill"] = -self._backfill_id_gen.get_current_token()
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return result
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def process_replication(self, result):
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stream = result.get("events")
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if stream:
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self._stream_id_gen.advance(int(stream["position"]))
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if stream["rows"]:
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logger.info("Got %d event rows", len(stream["rows"]))
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for row in stream["rows"]:
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self._process_replication_row(
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row, backfilled=False,
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)
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stream = result.get("backfill")
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if stream:
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self._backfill_id_gen.advance(-int(stream["position"]))
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for row in stream["rows"]:
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self._process_replication_row(
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row, backfilled=True,
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)
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stream = result.get("forward_ex_outliers")
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if stream:
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self._stream_id_gen.advance(int(stream["position"]))
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for row in stream["rows"]:
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event_id = row[1]
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self._invalidate_get_event_cache(event_id)
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stream = result.get("backward_ex_outliers")
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if stream:
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self._backfill_id_gen.advance(-int(stream["position"]))
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for row in stream["rows"]:
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event_id = row[1]
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self._invalidate_get_event_cache(event_id)
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return super(SlavedEventStore, self).process_replication(result)
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def _process_replication_row(self, row, backfilled):
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stream_ordering = row[0] if not backfilled else -row[0]
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self.invalidate_caches_for_event(
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stream_ordering, row[1], row[2], row[3], row[4], row[5],
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backfilled=backfilled,
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)
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def invalidate_caches_for_event(self, stream_ordering, event_id, room_id,
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etype, state_key, redacts, backfilled):
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self._invalidate_get_event_cache(event_id)
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self.get_latest_event_ids_in_room.invalidate((room_id,))
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self.get_unread_event_push_actions_by_room_for_user.invalidate_many(
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(room_id,)
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)
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if not backfilled:
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self._events_stream_cache.entity_has_changed(
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room_id, stream_ordering
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)
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if redacts:
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self._invalidate_get_event_cache(redacts)
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if etype == EventTypes.Member:
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self._membership_stream_cache.entity_has_changed(
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state_key, stream_ordering
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)
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self.get_invited_rooms_for_user.invalidate((state_key,))
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