Refactor out state delta handling into its own class (#4917)

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Amber Brown 2019-03-25 20:37:08 +11:00 committed by GitHub
parent 5fee9d8067
commit ac396a0d32
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5 changed files with 152 additions and 110 deletions

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@ -0,0 +1,74 @@
# -*- coding: utf-8 -*-
# Copyright 2018 Vector Creations 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.storage._base import SQLBaseStore
logger = logging.getLogger(__name__)
class StateDeltasStore(SQLBaseStore):
def get_current_state_deltas(self, prev_stream_id):
prev_stream_id = int(prev_stream_id)
if not self._curr_state_delta_stream_cache.has_any_entity_changed(prev_stream_id):
return []
def get_current_state_deltas_txn(txn):
# First we calculate the max stream id that will give us less than
# N results.
# We arbitarily limit to 100 stream_id entries to ensure we don't
# select toooo many.
sql = """
SELECT stream_id, count(*)
FROM current_state_delta_stream
WHERE stream_id > ?
GROUP BY stream_id
ORDER BY stream_id ASC
LIMIT 100
"""
txn.execute(sql, (prev_stream_id,))
total = 0
max_stream_id = prev_stream_id
for max_stream_id, count in txn:
total += count
if total > 100:
# We arbitarily limit to 100 entries to ensure we don't
# select toooo many.
break
# Now actually get the deltas
sql = """
SELECT stream_id, room_id, type, state_key, event_id, prev_event_id
FROM current_state_delta_stream
WHERE ? < stream_id AND stream_id <= ?
ORDER BY stream_id ASC
"""
txn.execute(sql, (prev_stream_id, max_stream_id,))
return self.cursor_to_dict(txn)
return self.runInteraction(
"get_current_state_deltas", get_current_state_deltas_txn
)
def get_max_stream_id_in_current_state_deltas(self):
return self._simple_select_one_onecol(
table="current_state_delta_stream",
keyvalues={},
retcol="COALESCE(MAX(stream_id), -1)",
desc="get_max_stream_id_in_current_state_deltas",
)

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@ -22,6 +22,7 @@ from synapse.api.constants import EventTypes, JoinRules
from synapse.storage.background_updates import BackgroundUpdateStore
from synapse.storage.engines import PostgresEngine, Sqlite3Engine
from synapse.storage.state import StateFilter
from synapse.storage.state_deltas import StateDeltasStore
from synapse.types import get_domain_from_id, get_localpart_from_id
from synapse.util.caches.descriptors import cached
@ -31,7 +32,7 @@ logger = logging.getLogger(__name__)
TEMP_TABLE = "_temp_populate_user_directory"
class UserDirectoryStore(BackgroundUpdateStore):
class UserDirectoryStore(StateDeltasStore, BackgroundUpdateStore):
# How many records do we calculate before sending it to
# add_users_who_share_private_rooms?
@ -488,16 +489,6 @@ class UserDirectoryStore(BackgroundUpdateStore):
defer.returnValue(user_ids)
@defer.inlineCallbacks
def get_all_local_users(self):
"""Get all local users
"""
sql = """
SELECT name FROM users
"""
rows = yield self._execute("get_all_local_users", None, sql)
defer.returnValue([name for name, in rows])
def add_users_who_share_private_room(self, room_id, user_id_tuples):
"""Insert entries into the users_who_share_private_rooms table. The first
user should be a local user.
@ -675,59 +666,6 @@ class UserDirectoryStore(BackgroundUpdateStore):
desc="update_user_directory_stream_pos",
)
def get_current_state_deltas(self, prev_stream_id):
prev_stream_id = int(prev_stream_id)
if not self._curr_state_delta_stream_cache.has_any_entity_changed(
prev_stream_id
):
return []
def get_current_state_deltas_txn(txn):
# First we calculate the max stream id that will give us less than
# N results.
# We arbitarily limit to 100 stream_id entries to ensure we don't
# select toooo many.
sql = """
SELECT stream_id, count(*)
FROM current_state_delta_stream
WHERE stream_id > ?
GROUP BY stream_id
ORDER BY stream_id ASC
LIMIT 100
"""
txn.execute(sql, (prev_stream_id,))
total = 0
max_stream_id = prev_stream_id
for max_stream_id, count in txn:
total += count
if total > 100:
# We arbitarily limit to 100 entries to ensure we don't
# select toooo many.
break
# Now actually get the deltas
sql = """
SELECT stream_id, room_id, type, state_key, event_id, prev_event_id
FROM current_state_delta_stream
WHERE ? < stream_id AND stream_id <= ?
ORDER BY stream_id ASC
"""
txn.execute(sql, (prev_stream_id, max_stream_id))
return self.cursor_to_dict(txn)
return self.runInteraction(
"get_current_state_deltas", get_current_state_deltas_txn
)
def get_max_stream_id_in_current_state_deltas(self):
return self._simple_select_one_onecol(
table="current_state_delta_stream",
keyvalues={},
retcol="COALESCE(MAX(stream_id), -1)",
desc="get_max_stream_id_in_current_state_deltas",
)
@defer.inlineCallbacks
def search_user_dir(self, user_id, search_term, limit):
"""Searches for users in directory