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Refactor out state delta handling into its own class (#4917)
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5 changed files with 152 additions and 110 deletions
74
synapse/storage/state_deltas.py
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74
synapse/storage/state_deltas.py
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# -*- coding: utf-8 -*-
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# Copyright 2018 Vector Creations 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 synapse.storage._base import SQLBaseStore
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logger = logging.getLogger(__name__)
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class StateDeltasStore(SQLBaseStore):
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def get_current_state_deltas(self, prev_stream_id):
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prev_stream_id = int(prev_stream_id)
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if not self._curr_state_delta_stream_cache.has_any_entity_changed(prev_stream_id):
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return []
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def get_current_state_deltas_txn(txn):
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# First we calculate the max stream id that will give us less than
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# N results.
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# We arbitarily limit to 100 stream_id entries to ensure we don't
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# select toooo many.
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sql = """
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SELECT stream_id, count(*)
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FROM current_state_delta_stream
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WHERE stream_id > ?
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GROUP BY stream_id
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ORDER BY stream_id ASC
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LIMIT 100
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"""
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txn.execute(sql, (prev_stream_id,))
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total = 0
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max_stream_id = prev_stream_id
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for max_stream_id, count in txn:
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total += count
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if total > 100:
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# We arbitarily limit to 100 entries to ensure we don't
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# select toooo many.
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break
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# Now actually get the deltas
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sql = """
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SELECT stream_id, room_id, type, state_key, event_id, prev_event_id
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FROM current_state_delta_stream
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WHERE ? < stream_id AND stream_id <= ?
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ORDER BY stream_id ASC
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"""
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txn.execute(sql, (prev_stream_id, max_stream_id,))
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return self.cursor_to_dict(txn)
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return self.runInteraction(
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"get_current_state_deltas", get_current_state_deltas_txn
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)
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def get_max_stream_id_in_current_state_deltas(self):
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return self._simple_select_one_onecol(
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table="current_state_delta_stream",
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keyvalues={},
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retcol="COALESCE(MAX(stream_id), -1)",
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desc="get_max_stream_id_in_current_state_deltas",
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)
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@ -22,6 +22,7 @@ from synapse.api.constants import EventTypes, JoinRules
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from synapse.storage.background_updates import BackgroundUpdateStore
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from synapse.storage.engines import PostgresEngine, Sqlite3Engine
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from synapse.storage.state import StateFilter
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from synapse.storage.state_deltas import StateDeltasStore
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from synapse.types import get_domain_from_id, get_localpart_from_id
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from synapse.util.caches.descriptors import cached
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@ -31,7 +32,7 @@ logger = logging.getLogger(__name__)
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TEMP_TABLE = "_temp_populate_user_directory"
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class UserDirectoryStore(BackgroundUpdateStore):
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class UserDirectoryStore(StateDeltasStore, BackgroundUpdateStore):
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# How many records do we calculate before sending it to
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# add_users_who_share_private_rooms?
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@ -488,16 +489,6 @@ class UserDirectoryStore(BackgroundUpdateStore):
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defer.returnValue(user_ids)
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@defer.inlineCallbacks
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def get_all_local_users(self):
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"""Get all local users
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"""
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sql = """
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SELECT name FROM users
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"""
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rows = yield self._execute("get_all_local_users", None, sql)
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defer.returnValue([name for name, in rows])
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def add_users_who_share_private_room(self, room_id, user_id_tuples):
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"""Insert entries into the users_who_share_private_rooms table. The first
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user should be a local user.
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@ -675,59 +666,6 @@ class UserDirectoryStore(BackgroundUpdateStore):
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desc="update_user_directory_stream_pos",
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)
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def get_current_state_deltas(self, prev_stream_id):
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prev_stream_id = int(prev_stream_id)
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if not self._curr_state_delta_stream_cache.has_any_entity_changed(
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prev_stream_id
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):
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return []
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def get_current_state_deltas_txn(txn):
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# First we calculate the max stream id that will give us less than
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# N results.
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# We arbitarily limit to 100 stream_id entries to ensure we don't
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# select toooo many.
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sql = """
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SELECT stream_id, count(*)
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FROM current_state_delta_stream
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WHERE stream_id > ?
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GROUP BY stream_id
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ORDER BY stream_id ASC
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LIMIT 100
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"""
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txn.execute(sql, (prev_stream_id,))
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total = 0
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max_stream_id = prev_stream_id
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for max_stream_id, count in txn:
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total += count
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if total > 100:
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# We arbitarily limit to 100 entries to ensure we don't
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# select toooo many.
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break
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# Now actually get the deltas
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sql = """
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SELECT stream_id, room_id, type, state_key, event_id, prev_event_id
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FROM current_state_delta_stream
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WHERE ? < stream_id AND stream_id <= ?
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ORDER BY stream_id ASC
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"""
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txn.execute(sql, (prev_stream_id, max_stream_id))
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return self.cursor_to_dict(txn)
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return self.runInteraction(
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"get_current_state_deltas", get_current_state_deltas_txn
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)
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def get_max_stream_id_in_current_state_deltas(self):
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return self._simple_select_one_onecol(
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table="current_state_delta_stream",
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keyvalues={},
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retcol="COALESCE(MAX(stream_id), -1)",
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desc="get_max_stream_id_in_current_state_deltas",
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)
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@defer.inlineCallbacks
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def search_user_dir(self, user_id, search_term, limit):
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"""Searches for users in directory
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