mirror of
https://mau.dev/maunium/synapse.git
synced 2024-10-01 01:36:05 -04:00
108 lines
3.8 KiB
Python
108 lines
3.8 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014-2016 OpenMarket Ltd
|
|
# Copyright 2017-2018 New Vector Ltd
|
|
# Copyright 2019 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# 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
|
|
import random
|
|
|
|
from six import PY2
|
|
from six.moves import builtins
|
|
|
|
from canonicaljson import json
|
|
|
|
from synapse.storage.database import LoggingTransaction # noqa: F401
|
|
from synapse.storage.database import make_in_list_sql_clause # noqa: F401
|
|
from synapse.storage.database import Database
|
|
from synapse.types import get_domain_from_id
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class SQLBaseStore(object):
|
|
"""Base class for data stores that holds helper functions.
|
|
|
|
Note that multiple instances of this class will exist as there will be one
|
|
per data store (and not one per physical database).
|
|
"""
|
|
|
|
def __init__(self, database: Database, db_conn, hs):
|
|
self.hs = hs
|
|
self._clock = hs.get_clock()
|
|
self.database_engine = hs.database_engine
|
|
self.db = database
|
|
self.rand = random.SystemRandom()
|
|
|
|
def _invalidate_state_caches(self, room_id, members_changed):
|
|
"""Invalidates caches that are based on the current state, but does
|
|
not stream invalidations down replication.
|
|
|
|
Args:
|
|
room_id (str): Room where state changed
|
|
members_changed (iterable[str]): The user_ids of members that have
|
|
changed
|
|
"""
|
|
for host in set(get_domain_from_id(u) for u in members_changed):
|
|
self._attempt_to_invalidate_cache("is_host_joined", (room_id, host))
|
|
self._attempt_to_invalidate_cache("was_host_joined", (room_id, host))
|
|
|
|
self._attempt_to_invalidate_cache("get_users_in_room", (room_id,))
|
|
self._attempt_to_invalidate_cache("get_room_summary", (room_id,))
|
|
self._attempt_to_invalidate_cache("get_current_state_ids", (room_id,))
|
|
|
|
def _attempt_to_invalidate_cache(self, cache_name, key):
|
|
"""Attempts to invalidate the cache of the given name, ignoring if the
|
|
cache doesn't exist. Mainly used for invalidating caches on workers,
|
|
where they may not have the cache.
|
|
|
|
Args:
|
|
cache_name (str)
|
|
key (tuple)
|
|
"""
|
|
try:
|
|
getattr(self, cache_name).invalidate(key)
|
|
except AttributeError:
|
|
# We probably haven't pulled in the cache in this worker,
|
|
# which is fine.
|
|
pass
|
|
|
|
|
|
def db_to_json(db_content):
|
|
"""
|
|
Take some data from a database row and return a JSON-decoded object.
|
|
|
|
Args:
|
|
db_content (memoryview|buffer|bytes|bytearray|unicode)
|
|
"""
|
|
# psycopg2 on Python 3 returns memoryview objects, which we need to
|
|
# cast to bytes to decode
|
|
if isinstance(db_content, memoryview):
|
|
db_content = db_content.tobytes()
|
|
|
|
# psycopg2 on Python 2 returns buffer objects, which we need to cast to
|
|
# bytes to decode
|
|
if PY2 and isinstance(db_content, builtins.buffer):
|
|
db_content = bytes(db_content)
|
|
|
|
# Decode it to a Unicode string before feeding it to json.loads, so we
|
|
# consistenty get a Unicode-containing object out.
|
|
if isinstance(db_content, (bytes, bytearray)):
|
|
db_content = db_content.decode("utf8")
|
|
|
|
try:
|
|
return json.loads(db_content)
|
|
except Exception:
|
|
logging.warning("Tried to decode '%r' as JSON and failed", db_content)
|
|
raise
|