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Add cache to room stream

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This commit is contained in:
Erik Johnston 2016-01-27 09:54:30 +00:00
parent f93ecf8783
commit b97f6626b6
5 changed files with 254 additions and 74 deletions
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42
synapse/handlers/sync.py
View file

@ -514,13 +514,6 @@ class SyncHandler(BaseHandler):
timeline_limit = sync_config.filter_collection.timeline_limit()
room_events, _ = yield self.store.get_room_events_stream(
sync_config.user.to_string(),
from_key=since_token.room_key,
to_key=now_token.room_key,
limit=timeline_limit + 1,
)
tags_by_room = yield self.store.get_updated_tags(
sync_config.user.to_string(),
since_token.account_data_key,
@ -533,6 +526,32 @@ class SyncHandler(BaseHandler):
)
)
rooms_changed = yield self.store.get_room_changes_for_user(
sync_config.user.to_string(), since_token.room_key, now_token.room_key
)
room_to_events = yield self.store.get_room_events_stream_for_rooms(
room_ids=room_ids,
from_key=since_token.room_key,
to_key=now_token.room_key,
limit=timeline_limit + 1,
)
room_events = [
event
for events, _ in room_to_events.values()
for event in events
]
room_events.extend(rooms_changed)
# room_events, _ = yield self.store.get_room_events_stream(
# sync_config.user.to_string(),
# from_key=since_token.room_key,
# to_key=now_token.room_key,
# limit=timeline_limit + 1,
# )
joined = []
archived = []
if len(room_events) <= timeline_limit:
@ -694,14 +713,12 @@ class SyncHandler(BaseHandler):
end_key = room_key
while limited and len(recents) < timeline_limit and max_repeat:
events, keys = yield self.store.get_recent_events_for_room(
events, end_key = yield self.store.get_recent_room_events_stream_for_room(
room_id,
limit=load_limit + 1,
from_token=since_token.room_key if since_token else None,
end_token=end_key,
from_key=since_token.room_key if since_token else None,
to_key=end_key,
)
room_key, _ = keys
end_key = "s" + room_key.split('-')[-1]
loaded_recents = sync_config.filter_collection.filter_room_timeline(events)
loaded_recents = yield self._filter_events_for_client(
sync_config.user.to_string(),
@ -712,6 +729,7 @@ class SyncHandler(BaseHandler):
recents = loaded_recents
if len(events) <= load_limit:
limited = False
break
max_repeat -= 1
if len(recents) > timeline_limit:

2
synapse/storage/events.py
View file

@ -128,6 +128,8 @@ class EventsStore(SQLBaseStore):
is_new_state=is_new_state,
current_state=current_state,
)
logger.info("Invalidating %r at %r", event.room_id, stream_ordering)
self._events_stream_cache.room_has_changed(None, event.room_id, stream_ordering)
except _RollbackButIsFineException:
pass

65
synapse/storage/receipts.py
View file

@ -16,6 +16,7 @@
from ._base import SQLBaseStore
from synapse.util.caches.descriptors import cachedInlineCallbacks, cachedList, cached
from synapse.util.caches import cache_counter, caches_by_name
from synapse.util.caches.room_change_cache import RoomStreamChangeCache
from twisted.internet import defer
@ -31,8 +32,8 @@ class ReceiptsStore(SQLBaseStore):
def __init__(self, hs):
super(ReceiptsStore, self).__init__(hs)
self._receipts_stream_cache = _RoomStreamChangeCache(
self._receipts_id_gen.get_max_token(None)
self._receipts_stream_cache = RoomStreamChangeCache(
"ReceiptsRoomChangeCache", self._receipts_id_gen.get_max_token(None)
)
@cached(num_args=2)
@ -370,63 +371,3 @@ class ReceiptsStore(SQLBaseStore):
"data": json.dumps(data),
}
)
class _RoomStreamChangeCache(object):
"""Keeps track of the stream_id of the latest change in rooms.
Given a list of rooms and stream key, it will give a subset of rooms that
may have changed since that key. If the key is too old then the cache
will simply return all rooms.
"""
def __init__(self, current_key, size_of_cache=10000):
self._size_of_cache = size_of_cache
self._room_to_key = {}
self._cache = sorteddict()
self._earliest_key = current_key
self.name = "ReceiptsRoomChangeCache"
caches_by_name[self.name] = self._cache
@defer.inlineCallbacks
def get_rooms_changed(self, store, room_ids, key):
"""Returns subset of room ids that have had new receipts since the
given key. If the key is too old it will just return the given list.
"""
if key > (yield self._get_earliest_key(store)):
keys = self._cache.keys()
i = keys.bisect_right(key)
result = set(
self._cache[k] for k in keys[i:]
).intersection(room_ids)
cache_counter.inc_hits(self.name)
else:
result = room_ids
cache_counter.inc_misses(self.name)
defer.returnValue(result)
@defer.inlineCallbacks
def room_has_changed(self, store, room_id, key):
"""Informs the cache that the room has been changed at the given key.
"""
if key > (yield self._get_earliest_key(store)):
old_key = self._room_to_key.get(room_id, None)
if old_key:
key = max(key, old_key)
self._cache.pop(old_key, None)
self._cache[key] = room_id
while len(self._cache) > self._size_of_cache:
k, r = self._cache.popitem()
self._earliest_key = max(k, self._earliest_key)
self._room_to_key.pop(r, None)
@defer.inlineCallbacks
def _get_earliest_key(self, store):
if self._earliest_key is None:
self._earliest_key = yield store.get_max_receipt_stream_id()
self._earliest_key = int(self._earliest_key)
defer.returnValue(self._earliest_key)

133
synapse/storage/stream.py
View file

@ -37,6 +37,7 @@ from twisted.internet import defer
from ._base import SQLBaseStore
from synapse.util.caches.descriptors import cachedInlineCallbacks
from synapse.util.caches.room_change_cache import RoomStreamChangeCache
from synapse.api.constants import EventTypes
from synapse.types import RoomStreamToken
from synapse.util.logutils import log_function
@ -77,6 +78,12 @@ def upper_bound(token):
class StreamStore(SQLBaseStore):
def __init__(self, hs):
super(StreamStore, self).__init__(hs)
self._events_stream_cache = RoomStreamChangeCache(
"EventsRoomStreamChangeCache", self._stream_id_gen.get_max_token(None)
)
@defer.inlineCallbacks
def get_appservice_room_stream(self, service, from_key, to_key, limit=0):
@ -157,6 +164,132 @@ class StreamStore(SQLBaseStore):
results = yield self.runInteraction("get_appservice_room_stream", f)
defer.returnValue(results)
@defer.inlineCallbacks
def get_room_events_stream_for_rooms(self, room_ids, from_key, to_key, limit=0):
from_id = RoomStreamToken.parse_stream_token(from_key).stream
room_ids = yield self._events_stream_cache.get_rooms_changed(
self, room_ids, from_id
)
if not room_ids:
defer.returnValue({})
results = {}
room_ids = list(room_ids)
for rm_ids in (room_ids[i:i+20] for i in xrange(0, len(room_ids), 20)):
res = yield defer.gatherResults([
self.get_recent_room_events_stream_for_room(
room_id, from_key, to_key, limit
).addCallback(lambda r, rm: (rm, r), room_id)
for room_id in room_ids
])
results.update(dict(res))
defer.returnValue(results)
@defer.inlineCallbacks
def get_recent_room_events_stream_for_room(self, room_id, from_key, to_key, limit=0):
if from_key is not None:
from_id = RoomStreamToken.parse_stream_token(from_key).stream
else:
from_id = None
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
defer.returnValue(([], from_key))
has_changed = yield self._events_stream_cache.get_room_has_changed(
room_id, from_id
)
if not has_changed:
defer.returnValue(([], from_key))
def f(txn):
if from_id is not None:
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering > ? AND stream_ordering <= ?"
" ORDER BY stream_ordering DESC LIMIT ?"
)
txn.execute(sql, (room_id, from_id, to_id, limit))
else:
sql = (
"SELECT event_id, stream_ordering FROM events WHERE"
" room_id = ?"
" AND not outlier"
" AND stream_ordering <= ?"
" ORDER BY stream_ordering DESC LIMIT ?"
)
txn.execute(sql, (room_id, to_id, limit))
rows = self.cursor_to_dict(txn)
ret = self._get_events_txn(
txn,
[r["event_id"] for r in rows],
get_prev_content=True
)
ret.reverse()
self._set_before_and_after(ret, rows)
if rows:
key = "s%d" % min(r["stream_ordering"] for r in rows)
else:
# Assume we didn't get anything because there was nothing to
# get.
key = from_key
return ret, key
res = yield self.runInteraction("get_recent_room_events_stream_for_room", f)
defer.returnValue(res)
def get_room_changes_for_user(self, user_id, from_key, to_key):
if from_key is not None:
from_id = RoomStreamToken.parse_stream_token(from_key).stream
else:
from_id = None
to_id = RoomStreamToken.parse_stream_token(to_key).stream
if from_key == to_key:
return defer.succeed([])
def f(txn):
if from_id is not None:
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e, room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND e.stream_ordering > ? AND e.stream_ordering <= ?"
" ORDER BY e.stream_ordering ASC"
)
txn.execute(sql, (user_id, from_id, to_id,))
else:
sql = (
"SELECT m.event_id, stream_ordering FROM events AS e, room_memberships AS m"
" WHERE e.event_id = m.event_id"
" AND m.user_id = ?"
" AND stream_ordering <= ?"
" ORDER BY stream_ordering ASC"
)
txn.execute(sql, (user_id, to_id,))
rows = self.cursor_to_dict(txn)
ret = self._get_events_txn(
txn,
[r["event_id"] for r in rows],
get_prev_content=True
)
return ret
return self.runInteraction("get_room_changes_for_user", f)
@log_function
def get_room_events_stream(
self,

86
synapse/util/caches/room_change_cache.py Normal file
View file

@ -0,0 +1,86 @@
# -*- coding: utf-8 -*-
# Copyright 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 synapse.util.caches import cache_counter, caches_by_name
from blist import sorteddict
import logging
logger = logging.getLogger(__name__)
class RoomStreamChangeCache(object):
"""Keeps track of the stream_id of the latest change in rooms.
Given a list of rooms and stream key, it will give a subset of rooms that
may have changed since that key. If the key is too old then the cache
will simply return all rooms.
"""
def __init__(self, name, current_key, size_of_cache=10000):
self._size_of_cache = size_of_cache
self._room_to_key = {}
self._cache = sorteddict()
self._earliest_known_key = current_key
self.name = name
caches_by_name[self.name] = self._cache
def get_room_has_changed(self, room_id, key):
if key <= self._earliest_known_key:
return True
room_key = self._room_to_key.get(room_id, None)
if room_key is None:
return True
if key < room_key:
return True
return False
def get_rooms_changed(self, store, room_ids, key):
"""Returns subset of room ids that have had new things since the
given key. If the key is too old it will just return the given list.
"""
if key > self._earliest_known_key:
keys = self._cache.keys()
i = keys.bisect_right(key)
result = set(
self._cache[k] for k in keys[i:]
).intersection(room_ids)
cache_counter.inc_hits(self.name)
else:
result = room_ids
cache_counter.inc_misses(self.name)
return result
def room_has_changed(self, store, room_id, key):
"""Informs the cache that the room has been changed at the given key.
"""
if key > self._earliest_known_key:
old_key = self._room_to_key.get(room_id, None)
if old_key:
key = max(key, old_key)
self._cache.pop(old_key, None)
self._cache[key] = room_id
while len(self._cache) > self._size_of_cache:
k, r = self._cache.popitem()
self._earliest_key = max(k, self._earliest_key)
self._room_to_key.pop(r, None)