Matrix-Mirrors/forked-synapse
1
0
Fork 0
mirror of https://mau.dev/maunium/synapse.git synced 2024-10-01 01:36:05 -04:00
Code Issues Packages Projects Releases Wiki Activity
43cd86ba8a
forked-synapse/synapse/storage/receipts.py
Erik Johnston 119cb9bbcf Reduce cache size by not storing deferreds 
Currently the cache descriptors store deferreds rather than raw values,
this is a simple way of triggering only one database hit and sharing the
result if two callers attempt to get the same value.

However, there are a few caches that simply store a mapping from string
to string (or int). These caches can have a large number of entries,
under the assumption that each entry is small. However, the size of a
deferred (specifically the size of ObservableDeferred) is signigicantly
larger than that of the raw value, 2kb vs 32b.

This PR therefore changes the cache descriptors to store the raw values
rather than the deferreds.

As a side effect cached storage function now either return a deferred or
the actual value, as the cached list decriptor already does. This is
fine as we always end up just yield'ing on the returned value
eventually, which handles that case correctly.
2017-04-25 10:23:11 +01:00

480 lines
16 KiB
Python
Raw Blame History

# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket 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.
from ._base import SQLBaseStore
from synapse.util.caches.descriptors import cachedInlineCallbacks, cachedList, cached
from synapse.util.caches.stream_change_cache import StreamChangeCache
from twisted.internet import defer
import logging
import ujson as json
logger = logging.getLogger(__name__)
class ReceiptsStore(SQLBaseStore):
def __init__(self, hs):
super(ReceiptsStore, self).__init__(hs)
self._receipts_stream_cache = StreamChangeCache(
"ReceiptsRoomChangeCache", self._receipts_id_gen.get_current_token()
)
@cachedInlineCallbacks()
def get_users_with_read_receipts_in_room(self, room_id):
receipts = yield self.get_receipts_for_room(room_id, "m.read")
defer.returnValue(set(r['user_id'] for r in receipts))
def _invalidate_get_users_with_receipts_in_room(self, room_id, receipt_type,
user_id):
if receipt_type != "m.read":
return
# Returns an ObservableDeferred
res = self.get_users_with_read_receipts_in_room.cache.get((room_id,), None)
if res:
if isinstance(res, defer.Deferred) and res.called:
res = res.result
if user_id in res:
# We'd only be adding to the set, so no point invalidating if the
# user is already there
return
self.get_users_with_read_receipts_in_room.invalidate((room_id,))
@cached(num_args=2)
def get_receipts_for_room(self, room_id, receipt_type):
return self._simple_select_list(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
},
retcols=("user_id", "event_id"),
desc="get_receipts_for_room",
)
@cached(num_args=3)
def get_last_receipt_event_id_for_user(self, user_id, room_id, receipt_type):
return self._simple_select_one_onecol(
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id
},
retcol="event_id",
desc="get_own_receipt_for_user",
allow_none=True,
)
@cachedInlineCallbacks(num_args=2)
def get_receipts_for_user(self, user_id, receipt_type):
rows = yield self._simple_select_list(
table="receipts_linearized",
keyvalues={
"user_id": user_id,
"receipt_type": receipt_type,
},
retcols=("room_id", "event_id"),
desc="get_receipts_for_user",
)
defer.returnValue({row["room_id"]: row["event_id"] for row in rows})
@defer.inlineCallbacks
def get_receipts_for_user_with_orderings(self, user_id, receipt_type):
def f(txn):
sql = (
"SELECT rl.room_id, rl.event_id,"
" e.topological_ordering, e.stream_ordering"
" FROM receipts_linearized AS rl"
" INNER JOIN events AS e USING (room_id, event_id)"
" WHERE rl.room_id = e.room_id"
" AND rl.event_id = e.event_id"
" AND user_id = ?"
)
txn.execute(sql, (user_id,))
return txn.fetchall()
rows = yield self.runInteraction(
"get_receipts_for_user_with_orderings", f
)
defer.returnValue({
row[0]: {
"event_id": row[1],
"topological_ordering": row[2],
"stream_ordering": row[3],
} for row in rows
})
@defer.inlineCallbacks
def get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
"""Get receipts for multiple rooms for sending to clients.
Args:
room_ids (list): List of room_ids.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
room_ids = set(room_ids)
if from_key:
room_ids = yield self._receipts_stream_cache.get_entities_changed(
room_ids, from_key
)
results = yield self._get_linearized_receipts_for_rooms(
room_ids, to_key, from_key=from_key
)
defer.returnValue([ev for res in results.values() for ev in res])
@cachedInlineCallbacks(num_args=3, tree=True)
def get_linearized_receipts_for_room(self, room_id, to_key, from_key=None):
"""Get receipts for a single room for sending to clients.
Args:
room_ids (str): The room id.
to_key (int): Max stream id to fetch receipts upto.
from_key (int): Min stream id to fetch receipts from. None fetches
from the start.
Returns:
list: A list of receipts.
"""
def f(txn):
if from_key:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id > ? AND stream_id <= ?"
)
txn.execute(
sql,
(room_id, from_key, to_key)
)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id = ? AND stream_id <= ?"
)
txn.execute(
sql,
(room_id, to_key)
)
rows = self.cursor_to_dict(txn)
return rows
rows = yield self.runInteraction(
"get_linearized_receipts_for_room", f
)
if not rows:
defer.returnValue([])
content = {}
for row in rows:
content.setdefault(
row["event_id"], {}
).setdefault(
row["receipt_type"], {}
)[row["user_id"]] = json.loads(row["data"])
defer.returnValue([{
"type": "m.receipt",
"room_id": room_id,
"content": content,
}])
@cachedList(cached_method_name="get_linearized_receipts_for_room",
list_name="room_ids", num_args=3, inlineCallbacks=True)
def _get_linearized_receipts_for_rooms(self, room_ids, to_key, from_key=None):
if not room_ids:
defer.returnValue({})
def f(txn):
if from_key:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id > ? AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.extend([from_key, to_key])
txn.execute(sql, args)
else:
sql = (
"SELECT * FROM receipts_linearized WHERE"
" room_id IN (%s) AND stream_id <= ?"
) % (
",".join(["?"] * len(room_ids))
)
args = list(room_ids)
args.append(to_key)
txn.execute(sql, args)
return self.cursor_to_dict(txn)
txn_results = yield self.runInteraction(
"_get_linearized_receipts_for_rooms", f
)
results = {}
for row in txn_results:
# We want a single event per room, since we want to batch the
# receipts by room, event and type.
room_event = results.setdefault(row["room_id"], {
"type": "m.receipt",
"room_id": row["room_id"],
"content": {},
})
# The content is of the form:
# {"$foo:bar": { "read": { "@user:host": <receipt> }, .. }, .. }
event_entry = room_event["content"].setdefault(row["event_id"], {})
receipt_type = event_entry.setdefault(row["receipt_type"], {})
receipt_type[row["user_id"]] = json.loads(row["data"])
results = {
room_id: [results[room_id]] if room_id in results else []
for room_id in room_ids
}
defer.returnValue(results)
def get_max_receipt_stream_id(self):
return self._receipts_id_gen.get_current_token()
def insert_linearized_receipt_txn(self, txn, room_id, receipt_type,
user_id, event_id, data, stream_id):
txn.call_after(
self.get_receipts_for_room.invalidate, (room_id, receipt_type)
)
txn.call_after(
self._invalidate_get_users_with_receipts_in_room,
room_id, receipt_type, user_id,
)
txn.call_after(
self.get_receipts_for_user.invalidate, (user_id, receipt_type)
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self.get_linearized_receipts_for_room.invalidate_many, (room_id,))
txn.call_after(
self._receipts_stream_cache.entity_has_changed,
room_id, stream_id
)
txn.call_after(
self.get_last_receipt_event_id_for_user.invalidate,
(user_id, room_id, receipt_type)
)
res = self._simple_select_one_txn(
txn,
table="events",
retcols=["topological_ordering", "stream_ordering"],
keyvalues={"event_id": event_id},
allow_none=True
)
topological_ordering = int(res["topological_ordering"]) if res else None
stream_ordering = int(res["stream_ordering"]) if res else None
# We don't want to clobber receipts for more recent events, so we
# have to compare orderings of existing receipts
sql = (
"SELECT topological_ordering, stream_ordering, event_id FROM events"
" INNER JOIN receipts_linearized as r USING (event_id, room_id)"
" WHERE r.room_id = ? AND r.receipt_type = ? AND r.user_id = ?"
)
txn.execute(sql, (room_id, receipt_type, user_id))
if topological_ordering:
for to, so, _ in txn:
if int(to) > topological_ordering:
return False
elif int(to) == topological_ordering and int(so) >= stream_ordering:
return False
self._simple_delete_txn(
txn,
table="receipts_linearized",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
}
)
self._simple_insert_txn(
txn,
table="receipts_linearized",
values={
"stream_id": stream_id,
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_id": event_id,
"data": json.dumps(data),
}
)
if receipt_type == "m.read" and topological_ordering:
self._remove_old_push_actions_before_txn(
txn,
room_id=room_id,
user_id=user_id,
topological_ordering=topological_ordering,
stream_ordering=stream_ordering,
)
return True
@defer.inlineCallbacks
def insert_receipt(self, room_id, receipt_type, user_id, event_ids, data):
"""Insert a receipt, either from local client or remote server.
Automatically does conversion between linearized and graph
representations.
"""
if not event_ids:
return
if len(event_ids) == 1:
linearized_event_id = event_ids[0]
else:
# we need to points in graph -> linearized form.
# TODO: Make this better.
def graph_to_linear(txn):
query = (
"SELECT event_id WHERE room_id = ? AND stream_ordering IN ("
" SELECT max(stream_ordering) WHERE event_id IN (%s)"
")"
) % (",".join(["?"] * len(event_ids)))
txn.execute(query, [room_id] + event_ids)
rows = txn.fetchall()
if rows:
return rows[0][0]
else:
raise RuntimeError("Unrecognized event_ids: %r" % (event_ids,))
linearized_event_id = yield self.runInteraction(
"insert_receipt_conv", graph_to_linear
)
stream_id_manager = self._receipts_id_gen.get_next()
with stream_id_manager as stream_id:
have_persisted = yield self.runInteraction(
"insert_linearized_receipt",
self.insert_linearized_receipt_txn,
room_id, receipt_type, user_id, linearized_event_id,
data,
stream_id=stream_id,
)
if not have_persisted:
defer.returnValue(None)
yield self.insert_graph_receipt(
room_id, receipt_type, user_id, event_ids, data
)
max_persisted_id = self._receipts_id_gen.get_current_token()
defer.returnValue((stream_id, max_persisted_id))
def insert_graph_receipt(self, room_id, receipt_type, user_id, event_ids,
data):
return self.runInteraction(
"insert_graph_receipt",
self.insert_graph_receipt_txn,
room_id, receipt_type, user_id, event_ids, data
)
def insert_graph_receipt_txn(self, txn, room_id, receipt_type,
user_id, event_ids, data):
txn.call_after(
self.get_receipts_for_room.invalidate, (room_id, receipt_type)
)
txn.call_after(
self._invalidate_get_users_with_receipts_in_room,
room_id, receipt_type, user_id,
)
txn.call_after(
self.get_receipts_for_user.invalidate, (user_id, receipt_type)
)
# FIXME: This shouldn't invalidate the whole cache
txn.call_after(self.get_linearized_receipts_for_room.invalidate_many, (room_id,))
self._simple_delete_txn(
txn,
table="receipts_graph",
keyvalues={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
}
)
self._simple_insert_txn(
txn,
table="receipts_graph",
values={
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_ids": json.dumps(event_ids),
"data": json.dumps(data),
}
)
def get_all_updated_receipts(self, last_id, current_id, limit=None):
if last_id == current_id:
return defer.succeed([])
def get_all_updated_receipts_txn(txn):
sql = (
"SELECT stream_id, room_id, receipt_type, user_id, event_id, data"
" FROM receipts_linearized"
" WHERE ? < stream_id AND stream_id <= ?"
" ORDER BY stream_id ASC"
)
args = [last_id, current_id]
if limit is not None:
sql += " LIMIT ?"
args.append(limit)
txn.execute(sql, args)
return txn.fetchall()
return self.runInteraction(
"get_all_updated_receipts", get_all_updated_receipts_txn
)
Reference in New Issue View Git Blame Copy Permalink