483 lines
17 KiB
Python
483 lines
17 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018, 2019 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 logging
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from twisted.internet import defer
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from synapse.api.constants import EventTypes, Membership
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from synapse.storage.prepare_database import get_statements
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from synapse.storage.state_deltas import StateDeltasStore
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from synapse.util.caches.descriptors import cached
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logger = logging.getLogger(__name__)
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# these fields track absolutes (e.g. total number of rooms on the server)
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ABSOLUTE_STATS_FIELDS = {
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"room": (
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"current_state_events",
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"joined_members",
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"invited_members",
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"left_members",
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"banned_members",
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"state_events",
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),
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"user": ("public_rooms", "private_rooms"),
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}
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TYPE_TO_ROOM = {"room": ("room_stats", "room_id"), "user": ("user_stats", "user_id")}
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TEMP_TABLE = "_temp_populate_stats"
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class StatsStore(StateDeltasStore):
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def __init__(self, db_conn, hs):
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super(StatsStore, self).__init__(db_conn, hs)
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self.server_name = hs.hostname
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self.clock = self.hs.get_clock()
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self.stats_enabled = hs.config.stats_enabled
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self.stats_bucket_size = hs.config.stats_bucket_size
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self.register_background_update_handler(
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"populate_stats_createtables", self._populate_stats_createtables
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)
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self.register_background_update_handler(
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"populate_stats_process_rooms", self._populate_stats_process_rooms
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)
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self.register_background_update_handler(
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"populate_stats_cleanup", self._populate_stats_cleanup
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)
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@defer.inlineCallbacks
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def _populate_stats_createtables(self, progress, batch_size):
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if not self.stats_enabled:
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yield self._end_background_update("populate_stats_createtables")
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defer.returnValue(1)
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# Get all the rooms that we want to process.
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def _make_staging_area(txn):
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# Create the temporary tables
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stmts = get_statements(
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"""
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-- We just recreate the table, we'll be reinserting the
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-- correct entries again later anyway.
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DROP TABLE IF EXISTS {temp}_rooms;
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CREATE TABLE IF NOT EXISTS {temp}_rooms(
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room_id TEXT NOT NULL,
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events BIGINT NOT NULL
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);
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CREATE INDEX {temp}_rooms_events
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ON {temp}_rooms(events);
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CREATE INDEX {temp}_rooms_id
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ON {temp}_rooms(room_id);
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""".format(
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temp=TEMP_TABLE
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).splitlines()
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)
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for statement in stmts:
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txn.execute(statement)
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sql = (
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"CREATE TABLE IF NOT EXISTS "
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+ TEMP_TABLE
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+ "_position(position TEXT NOT NULL)"
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)
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txn.execute(sql)
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# Get rooms we want to process from the database, only adding
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# those that we haven't (i.e. those not in room_stats_earliest_token)
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sql = """
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INSERT INTO %s_rooms (room_id, events)
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SELECT c.room_id, count(*) FROM current_state_events AS c
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LEFT JOIN room_stats_earliest_token AS t USING (room_id)
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WHERE t.room_id IS NULL
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GROUP BY c.room_id
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""" % (
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TEMP_TABLE,
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)
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txn.execute(sql)
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new_pos = yield self.get_max_stream_id_in_current_state_deltas()
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yield self.runInteraction("populate_stats_temp_build", _make_staging_area)
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yield self._simple_insert(TEMP_TABLE + "_position", {"position": new_pos})
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self.get_earliest_token_for_room_stats.invalidate_all()
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yield self._end_background_update("populate_stats_createtables")
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defer.returnValue(1)
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@defer.inlineCallbacks
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def _populate_stats_cleanup(self, progress, batch_size):
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"""
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Update the user directory stream position, then clean up the old tables.
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"""
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if not self.stats_enabled:
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yield self._end_background_update("populate_stats_cleanup")
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defer.returnValue(1)
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position = yield self._simple_select_one_onecol(
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TEMP_TABLE + "_position", None, "position"
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)
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yield self.update_stats_stream_pos(position)
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def _delete_staging_area(txn):
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txn.execute("DROP TABLE IF EXISTS " + TEMP_TABLE + "_rooms")
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txn.execute("DROP TABLE IF EXISTS " + TEMP_TABLE + "_position")
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yield self.runInteraction("populate_stats_cleanup", _delete_staging_area)
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yield self._end_background_update("populate_stats_cleanup")
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defer.returnValue(1)
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@defer.inlineCallbacks
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def _populate_stats_process_rooms(self, progress, batch_size):
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if not self.stats_enabled:
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yield self._end_background_update("populate_stats_process_rooms")
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defer.returnValue(1)
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# If we don't have progress filed, delete everything.
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if not progress:
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yield self.delete_all_stats()
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def _get_next_batch(txn):
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# Only fetch 250 rooms, so we don't fetch too many at once, even
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# if those 250 rooms have less than batch_size state events.
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sql = """
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SELECT room_id, events FROM %s_rooms
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ORDER BY events DESC
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LIMIT 250
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""" % (
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TEMP_TABLE,
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)
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txn.execute(sql)
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rooms_to_work_on = txn.fetchall()
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if not rooms_to_work_on:
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return None
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# Get how many are left to process, so we can give status on how
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# far we are in processing
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txn.execute("SELECT COUNT(*) FROM " + TEMP_TABLE + "_rooms")
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progress["remaining"] = txn.fetchone()[0]
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return rooms_to_work_on
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rooms_to_work_on = yield self.runInteraction(
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"populate_stats_temp_read", _get_next_batch
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)
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# No more rooms -- complete the transaction.
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if not rooms_to_work_on:
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yield self._end_background_update("populate_stats_process_rooms")
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defer.returnValue(1)
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logger.info(
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"Processing the next %d rooms of %d remaining",
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len(rooms_to_work_on),
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progress["remaining"],
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)
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# Number of state events we've processed by going through each room
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processed_event_count = 0
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for room_id, event_count in rooms_to_work_on:
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current_state_ids = yield self.get_current_state_ids(room_id)
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join_rules_id = current_state_ids.get((EventTypes.JoinRules, ""))
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history_visibility_id = current_state_ids.get(
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(EventTypes.RoomHistoryVisibility, "")
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)
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encryption_id = current_state_ids.get((EventTypes.RoomEncryption, ""))
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name_id = current_state_ids.get((EventTypes.Name, ""))
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topic_id = current_state_ids.get((EventTypes.Topic, ""))
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avatar_id = current_state_ids.get((EventTypes.RoomAvatar, ""))
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canonical_alias_id = current_state_ids.get((EventTypes.CanonicalAlias, ""))
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state_events = yield self.get_events(
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[
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join_rules_id,
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history_visibility_id,
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encryption_id,
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name_id,
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topic_id,
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avatar_id,
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canonical_alias_id,
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]
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)
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def _get_or_none(event_id, arg):
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event = state_events.get(event_id)
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if event:
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return event.content.get(arg)
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return None
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yield self.update_room_state(
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room_id,
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{
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"join_rules": _get_or_none(join_rules_id, "join_rule"),
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"history_visibility": _get_or_none(
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history_visibility_id, "history_visibility"
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),
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"encryption": _get_or_none(encryption_id, "algorithm"),
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"name": _get_or_none(name_id, "name"),
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"topic": _get_or_none(topic_id, "topic"),
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"avatar": _get_or_none(avatar_id, "url"),
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"canonical_alias": _get_or_none(canonical_alias_id, "alias"),
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},
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)
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now = self.hs.get_reactor().seconds()
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# quantise time to the nearest bucket
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now = (now // self.stats_bucket_size) * self.stats_bucket_size
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def _fetch_data(txn):
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# Get the current token of the room
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current_token = self._get_max_stream_id_in_current_state_deltas_txn(txn)
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current_state_events = len(current_state_ids)
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membership_counts = self._get_user_counts_in_room_txn(txn, room_id)
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total_state_events = self._get_total_state_event_counts_txn(
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txn, room_id
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)
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self._update_stats_txn(
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txn,
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"room",
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room_id,
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now,
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{
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"bucket_size": self.stats_bucket_size,
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"current_state_events": current_state_events,
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"joined_members": membership_counts.get(Membership.JOIN, 0),
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"invited_members": membership_counts.get(Membership.INVITE, 0),
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"left_members": membership_counts.get(Membership.LEAVE, 0),
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"banned_members": membership_counts.get(Membership.BAN, 0),
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"state_events": total_state_events,
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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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"room_stats_earliest_token",
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{"room_id": room_id, "token": current_token},
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)
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# We've finished a room. Delete it from the table.
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self._simple_delete_one_txn(
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txn, TEMP_TABLE + "_rooms", {"room_id": room_id}
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)
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yield self.runInteraction("update_room_stats", _fetch_data)
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# Update the remaining counter.
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progress["remaining"] -= 1
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yield self.runInteraction(
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"populate_stats",
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self._background_update_progress_txn,
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"populate_stats_process_rooms",
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progress,
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)
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processed_event_count += event_count
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if processed_event_count > batch_size:
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# Don't process any more rooms, we've hit our batch size.
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defer.returnValue(processed_event_count)
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defer.returnValue(processed_event_count)
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def delete_all_stats(self):
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"""
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Delete all statistics records.
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"""
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def _delete_all_stats_txn(txn):
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txn.execute("DELETE FROM room_state")
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txn.execute("DELETE FROM room_stats")
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txn.execute("DELETE FROM room_stats_earliest_token")
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txn.execute("DELETE FROM user_stats")
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return self.runInteraction("delete_all_stats", _delete_all_stats_txn)
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def get_stats_stream_pos(self):
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return self._simple_select_one_onecol(
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table="stats_stream_pos",
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keyvalues={},
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retcol="stream_id",
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desc="stats_stream_pos",
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)
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def update_stats_stream_pos(self, stream_id):
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return self._simple_update_one(
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table="stats_stream_pos",
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keyvalues={},
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updatevalues={"stream_id": stream_id},
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desc="update_stats_stream_pos",
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)
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def update_room_state(self, room_id, fields):
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"""
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Args:
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room_id (str)
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fields (dict[str:Any])
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"""
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# For whatever reason some of the fields may contain null bytes, which
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# postgres isn't a fan of, so we replace those fields with null.
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for col in (
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"join_rules",
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"history_visibility",
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"encryption",
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"name",
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"topic",
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"avatar",
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"canonical_alias",
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):
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field = fields.get(col)
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if field and "\0" in field:
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fields[col] = None
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return self._simple_upsert(
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table="room_state",
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keyvalues={"room_id": room_id},
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values=fields,
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desc="update_room_state",
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)
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def get_deltas_for_room(self, room_id, start, size=100):
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"""
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Get statistics deltas for a given room.
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Args:
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room_id (str)
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start (int): Pagination start. Number of entries, not timestamp.
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size (int): How many entries to return.
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Returns:
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Deferred[list[dict]], where the dict has the keys of
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ABSOLUTE_STATS_FIELDS["room"] and "ts".
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"""
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return self._simple_select_list_paginate(
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"room_stats",
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{"room_id": room_id},
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"ts",
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start,
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size,
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retcols=(list(ABSOLUTE_STATS_FIELDS["room"]) + ["ts"]),
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order_direction="DESC",
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)
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def get_all_room_state(self):
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return self._simple_select_list(
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"room_state", None, retcols=("name", "topic", "canonical_alias")
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)
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@cached()
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def get_earliest_token_for_room_stats(self, room_id):
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"""
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Fetch the "earliest token". This is used by the room stats delta
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processor to ignore deltas that have been processed between the
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start of the background task and any particular room's stats
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being calculated.
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Returns:
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Deferred[int]
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"""
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return self._simple_select_one_onecol(
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"room_stats_earliest_token",
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{"room_id": room_id},
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retcol="token",
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allow_none=True,
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)
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def update_stats(self, stats_type, stats_id, ts, fields):
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table, id_col = TYPE_TO_ROOM[stats_type]
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return self._simple_upsert(
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table=table,
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keyvalues={id_col: stats_id, "ts": ts},
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values=fields,
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desc="update_stats",
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)
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def _update_stats_txn(self, txn, stats_type, stats_id, ts, fields):
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table, id_col = TYPE_TO_ROOM[stats_type]
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return self._simple_upsert_txn(
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txn, table=table, keyvalues={id_col: stats_id, "ts": ts}, values=fields
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)
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def update_stats_delta(self, ts, stats_type, stats_id, field, value):
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def _update_stats_delta(txn):
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table, id_col = TYPE_TO_ROOM[stats_type]
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sql = (
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"SELECT * FROM %s"
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" WHERE %s=? and ts=("
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" SELECT MAX(ts) FROM %s"
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" WHERE %s=?"
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")"
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) % (table, id_col, table, id_col)
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txn.execute(sql, (stats_id, stats_id))
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rows = self.cursor_to_dict(txn)
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if len(rows) == 0:
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# silently skip as we don't have anything to apply a delta to yet.
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# this tries to minimise any race between the initial sync and
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# subsequent deltas arriving.
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return
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current_ts = ts
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latest_ts = rows[0]["ts"]
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if current_ts < latest_ts:
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# This one is in the past, but we're just encountering it now.
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# Mark it as part of the current bucket.
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current_ts = latest_ts
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elif ts != latest_ts:
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# we have to copy our absolute counters over to the new entry.
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values = {
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key: rows[0][key] for key in ABSOLUTE_STATS_FIELDS[stats_type]
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}
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values[id_col] = stats_id
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values["ts"] = ts
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values["bucket_size"] = self.stats_bucket_size
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self._simple_insert_txn(txn, table=table, values=values)
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# actually update the new value
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if stats_type in ABSOLUTE_STATS_FIELDS[stats_type]:
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self._simple_update_txn(
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txn,
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table=table,
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keyvalues={id_col: stats_id, "ts": current_ts},
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updatevalues={field: value},
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)
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else:
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sql = ("UPDATE %s SET %s=%s+? WHERE %s=? AND ts=?") % (
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table,
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field,
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field,
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id_col,
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)
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txn.execute(sql, (value, stats_id, current_ts))
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return self.runInteraction("update_stats_delta", _update_stats_delta)
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