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Rename database classes to make some sense (#8033)

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Erik Johnston 2020-08-05 21:38:57 +01:00 • committed by GitHub
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# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2018 New Vector 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 abc
import logging
from typing import List, Tuple
from canonicaljson import json
from twisted.internet import defer
from synapse.storage._base import SQLBaseStore, db_to_json
from synapse.storage.database import DatabasePool
from synapse.storage.util.id_generators import StreamIdGenerator
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
from synapse.util.caches.stream_change_cache import StreamChangeCache
logger = logging.getLogger(__name__)
class AccountDataWorkerStore(SQLBaseStore):
"""This is an abstract base class where subclasses must implement
`get_max_account_data_stream_id` which can be called in the initializer.
"""
# This ABCMeta metaclass ensures that we cannot be instantiated without
# the abstract methods being implemented.
__metaclass__ = abc.ABCMeta
def __init__(self, database: DatabasePool, db_conn, hs):
account_max = self.get_max_account_data_stream_id()
self._account_data_stream_cache = StreamChangeCache(
"AccountDataAndTagsChangeCache", account_max
)
super(AccountDataWorkerStore, self).__init__(database, db_conn, hs)
@abc.abstractmethod
def get_max_account_data_stream_id(self):
"""Get the current max stream ID for account data stream
Returns:
int
"""
raise NotImplementedError()
@cached()
def get_account_data_for_user(self, user_id):
"""Get all the client account_data for a user.
Args:
user_id(str): The user to get the account_data for.
Returns:
A deferred pair of a dict of global account_data and a dict
mapping from room_id string to per room account_data dicts.
"""
def get_account_data_for_user_txn(txn):
rows = self.db_pool.simple_select_list_txn(
txn,
"account_data",
{"user_id": user_id},
["account_data_type", "content"],
)
global_account_data = {
row["account_data_type"]: db_to_json(row["content"]) for row in rows
}
rows = self.db_pool.simple_select_list_txn(
txn,
"room_account_data",
{"user_id": user_id},
["room_id", "account_data_type", "content"],
)
by_room = {}
for row in rows:
room_data = by_room.setdefault(row["room_id"], {})
room_data[row["account_data_type"]] = db_to_json(row["content"])
return global_account_data, by_room
return self.db_pool.runInteraction(
"get_account_data_for_user", get_account_data_for_user_txn
)
@cachedInlineCallbacks(num_args=2, max_entries=5000)
def get_global_account_data_by_type_for_user(self, data_type, user_id):
"""
Returns:
Deferred: A dict
"""
result = yield self.db_pool.simple_select_one_onecol(
table="account_data",
keyvalues={"user_id": user_id, "account_data_type": data_type},
retcol="content",
desc="get_global_account_data_by_type_for_user",
allow_none=True,
)
if result:
return db_to_json(result)
else:
return None
@cached(num_args=2)
def get_account_data_for_room(self, user_id, room_id):
"""Get all the client account_data for a user for a room.
Args:
user_id(str): The user to get the account_data for.
room_id(str): The room to get the account_data for.
Returns:
A deferred dict of the room account_data
"""
def get_account_data_for_room_txn(txn):
rows = self.db_pool.simple_select_list_txn(
txn,
"room_account_data",
{"user_id": user_id, "room_id": room_id},
["account_data_type", "content"],
)
return {
row["account_data_type"]: db_to_json(row["content"]) for row in rows
}
return self.db_pool.runInteraction(
"get_account_data_for_room", get_account_data_for_room_txn
)
@cached(num_args=3, max_entries=5000)
def get_account_data_for_room_and_type(self, user_id, room_id, account_data_type):
"""Get the client account_data of given type for a user for a room.
Args:
user_id(str): The user to get the account_data for.
room_id(str): The room to get the account_data for.
account_data_type (str): The account data type to get.
Returns:
A deferred of the room account_data for that type, or None if
there isn't any set.
"""
def get_account_data_for_room_and_type_txn(txn):
content_json = self.db_pool.simple_select_one_onecol_txn(
txn,
table="room_account_data",
keyvalues={
"user_id": user_id,
"room_id": room_id,
"account_data_type": account_data_type,
},
retcol="content",
allow_none=True,
)
return db_to_json(content_json) if content_json else None
return self.db_pool.runInteraction(
"get_account_data_for_room_and_type", get_account_data_for_room_and_type_txn
)
async def get_updated_global_account_data(
self, last_id: int, current_id: int, limit: int
) -> List[Tuple[int, str, str]]:
"""Get the global account_data that has changed, for the account_data stream
Args:
last_id: the last stream_id from the previous batch.
current_id: the maximum stream_id to return up to
limit: the maximum number of rows to return
Returns:
A list of tuples of stream_id int, user_id string,
and type string.
"""
if last_id == current_id:
return []
def get_updated_global_account_data_txn(txn):
sql = (
"SELECT stream_id, user_id, account_data_type"
" FROM account_data WHERE ? < stream_id AND stream_id <= ?"
" ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, current_id, limit))
return txn.fetchall()
return await self.db_pool.runInteraction(
"get_updated_global_account_data", get_updated_global_account_data_txn
)
async def get_updated_room_account_data(
self, last_id: int, current_id: int, limit: int
) -> List[Tuple[int, str, str, str]]:
"""Get the global account_data that has changed, for the account_data stream
Args:
last_id: the last stream_id from the previous batch.
current_id: the maximum stream_id to return up to
limit: the maximum number of rows to return
Returns:
A list of tuples of stream_id int, user_id string,
room_id string and type string.
"""
if last_id == current_id:
return []
def get_updated_room_account_data_txn(txn):
sql = (
"SELECT stream_id, user_id, room_id, account_data_type"
" FROM room_account_data WHERE ? < stream_id AND stream_id <= ?"
" ORDER BY stream_id ASC LIMIT ?"
)
txn.execute(sql, (last_id, current_id, limit))
return txn.fetchall()
return await self.db_pool.runInteraction(
"get_updated_room_account_data", get_updated_room_account_data_txn
)
def get_updated_account_data_for_user(self, user_id, stream_id):
"""Get all the client account_data for a that's changed for a user
Args:
user_id(str): The user to get the account_data for.
stream_id(int): The point in the stream since which to get updates
Returns:
A deferred pair of a dict of global account_data and a dict
mapping from room_id string to per room account_data dicts.
"""
def get_updated_account_data_for_user_txn(txn):
sql = (
"SELECT account_data_type, content FROM account_data"
" WHERE user_id = ? AND stream_id > ?"
)
txn.execute(sql, (user_id, stream_id))
global_account_data = {row[0]: db_to_json(row[1]) for row in txn}
sql = (
"SELECT room_id, account_data_type, content FROM room_account_data"
" WHERE user_id = ? AND stream_id > ?"
)
txn.execute(sql, (user_id, stream_id))
account_data_by_room = {}
for row in txn:
room_account_data = account_data_by_room.setdefault(row[0], {})
room_account_data[row[1]] = db_to_json(row[2])
return global_account_data, account_data_by_room
changed = self._account_data_stream_cache.has_entity_changed(
user_id, int(stream_id)
)
if not changed:
return defer.succeed(({}, {}))
return self.db_pool.runInteraction(
"get_updated_account_data_for_user", get_updated_account_data_for_user_txn
)
@cachedInlineCallbacks(num_args=2, cache_context=True, max_entries=5000)
def is_ignored_by(self, ignored_user_id, ignorer_user_id, cache_context):
ignored_account_data = yield self.get_global_account_data_by_type_for_user(
"m.ignored_user_list",
ignorer_user_id,
on_invalidate=cache_context.invalidate,
)
if not ignored_account_data:
return False
return ignored_user_id in ignored_account_data.get("ignored_users", {})
class AccountDataStore(AccountDataWorkerStore):
def __init__(self, database: DatabasePool, db_conn, hs):
self._account_data_id_gen = StreamIdGenerator(
db_conn,
"account_data_max_stream_id",
"stream_id",
extra_tables=[
("room_account_data", "stream_id"),
("room_tags_revisions", "stream_id"),
],
)
super(AccountDataStore, self).__init__(database, db_conn, hs)
def get_max_account_data_stream_id(self):
"""Get the current max stream id for the private user data stream
Returns:
A deferred int.
"""
return self._account_data_id_gen.get_current_token()
@defer.inlineCallbacks
def add_account_data_to_room(self, user_id, room_id, account_data_type, content):
"""Add some account_data to a room for a user.
Args:
user_id(str): The user to add a tag for.
room_id(str): The room to add a tag for.
account_data_type(str): The type of account_data to add.
content(dict): A json object to associate with the tag.
Returns:
A deferred that completes once the account_data has been added.
"""
content_json = json.dumps(content)
with self._account_data_id_gen.get_next() as next_id:
# no need to lock here as room_account_data has a unique constraint
# on (user_id, room_id, account_data_type) so simple_upsert will
# retry if there is a conflict.
yield self.db_pool.simple_upsert(
desc="add_room_account_data",
table="room_account_data",
keyvalues={
"user_id": user_id,
"room_id": room_id,
"account_data_type": account_data_type,
},
values={"stream_id": next_id, "content": content_json},
lock=False,
)
# it's theoretically possible for the above to succeed and the
# below to fail - in which case we might reuse a stream id on
# restart, and the above update might not get propagated. That
# doesn't sound any worse than the whole update getting lost,
# which is what would happen if we combined the two into one
# transaction.
yield self._update_max_stream_id(next_id)
self._account_data_stream_cache.entity_has_changed(user_id, next_id)
self.get_account_data_for_user.invalidate((user_id,))
self.get_account_data_for_room.invalidate((user_id, room_id))
self.get_account_data_for_room_and_type.prefill(
(user_id, room_id, account_data_type), content
)
result = self._account_data_id_gen.get_current_token()
return result
@defer.inlineCallbacks
def add_account_data_for_user(self, user_id, account_data_type, content):
"""Add some account_data to a room for a user.
Args:
user_id(str): The user to add a tag for.
account_data_type(str): The type of account_data to add.
content(dict): A json object to associate with the tag.
Returns:
A deferred that completes once the account_data has been added.
"""
content_json = json.dumps(content)
with self._account_data_id_gen.get_next() as next_id:
# no need to lock here as account_data has a unique constraint on
# (user_id, account_data_type) so simple_upsert will retry if
# there is a conflict.
yield self.db_pool.simple_upsert(
desc="add_user_account_data",
table="account_data",
keyvalues={"user_id": user_id, "account_data_type": account_data_type},
values={"stream_id": next_id, "content": content_json},
lock=False,
)
# it's theoretically possible for the above to succeed and the
# below to fail - in which case we might reuse a stream id on
# restart, and the above update might not get propagated. That
# doesn't sound any worse than the whole update getting lost,
# which is what would happen if we combined the two into one
# transaction.
#
# Note: This is only here for backwards compat to allow admins to
# roll back to a previous Synapse version. Next time we update the
# database version we can remove this table.
yield self._update_max_stream_id(next_id)
self._account_data_stream_cache.entity_has_changed(user_id, next_id)
self.get_account_data_for_user.invalidate((user_id,))
self.get_global_account_data_by_type_for_user.invalidate(
(account_data_type, user_id)
)
result = self._account_data_id_gen.get_current_token()
return result
def _update_max_stream_id(self, next_id):
"""Update the max stream_id
Args:
next_id(int): The the revision to advance to.
"""
# Note: This is only here for backwards compat to allow admins to
# roll back to a previous Synapse version. Next time we update the
# database version we can remove this table.
def _update(txn):
update_max_id_sql = (
"UPDATE account_data_max_stream_id"
" SET stream_id = ?"
" WHERE stream_id < ?"
)
txn.execute(update_max_id_sql, (next_id, next_id))
return self.db_pool.runInteraction("update_account_data_max_stream_id", _update)