125 lines
4.4 KiB
Python
125 lines
4.4 KiB
Python
# 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
|
|
from abc import ABCMeta
|
|
from typing import TYPE_CHECKING, Any, Collection, Iterable, Optional, Union
|
|
|
|
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 DatabasePool
|
|
from synapse.storage.types import Connection
|
|
from synapse.types import StreamToken, get_domain_from_id
|
|
from synapse.util import json_decoder
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.server import HomeServer
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
# some of our subclasses have abstract methods, so we use the ABCMeta metaclass.
|
|
class SQLBaseStore(metaclass=ABCMeta):
|
|
"""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: DatabasePool, db_conn: Connection, hs: "HomeServer"):
|
|
self.hs = hs
|
|
self._clock = hs.get_clock()
|
|
self.database_engine = database.engine
|
|
self.db_pool = database
|
|
|
|
def process_replication_rows(
|
|
self,
|
|
stream_name: str,
|
|
instance_name: str,
|
|
token: StreamToken,
|
|
rows: Iterable[Any],
|
|
) -> None:
|
|
pass
|
|
|
|
def _invalidate_state_caches(
|
|
self, room_id: str, members_changed: Iterable[str]
|
|
) -> None:
|
|
"""Invalidates caches that are based on the current state, but does
|
|
not stream invalidations down replication.
|
|
|
|
Args:
|
|
room_id: Room where state changed
|
|
members_changed: The user_ids of members that have changed
|
|
"""
|
|
for host in {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("get_users_in_room", (room_id,))
|
|
self._attempt_to_invalidate_cache("get_users_in_room_with_profiles", (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: str, key: Optional[Collection[Any]]
|
|
) -> None:
|
|
"""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
|
|
key: Entry to invalidate. If None then invalidates the entire
|
|
cache.
|
|
"""
|
|
|
|
try:
|
|
cache = getattr(self, cache_name)
|
|
except AttributeError:
|
|
# We probably haven't pulled in the cache in this worker,
|
|
# which is fine.
|
|
return
|
|
|
|
if key is None:
|
|
cache.invalidate_all()
|
|
else:
|
|
cache.invalidate(tuple(key))
|
|
|
|
|
|
def db_to_json(db_content: Union[memoryview, bytes, bytearray, str]) -> Any:
|
|
"""
|
|
Take some data from a database row and return a JSON-decoded object.
|
|
|
|
Args:
|
|
db_content: The JSON-encoded contents from the database.
|
|
|
|
Returns:
|
|
The object decoded from JSON.
|
|
"""
|
|
# 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()
|
|
|
|
# Decode it to a Unicode string before feeding it to the JSON decoder, since
|
|
# it only supports handling strings
|
|
if isinstance(db_content, (bytes, bytearray)):
|
|
db_content = db_content.decode("utf8")
|
|
|
|
try:
|
|
return json_decoder.decode(db_content)
|
|
except Exception:
|
|
logging.warning("Tried to decode '%r' as JSON and failed", db_content)
|
|
raise
|