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Merge pull request #1178 from matrix-org/erikj/current_room_token

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Fix incredibly slow back pagination query
This commit is contained in:
Erik Johnston 2016-10-24 13:58:28 +01:00 committed by GitHub
parent a842fed418 b6800a8ecd
commit e83a08d795
4 changed files with 48 additions and 12 deletions
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4
synapse/handlers/message.py
View file

@ -82,8 +82,8 @@ class MessageHandler(BaseHandler):
room_token = pagin_config.from_token.room_key
else:
pagin_config.from_token = (
yield self.hs.get_event_sources().get_current_token(
direction='b'
yield self.hs.get_event_sources().get_current_token_for_room(
room_id=room_id
)
)
room_token = pagin_config.from_token.room_key

7
synapse/handlers/room.py
View file

@ -475,8 +475,11 @@ class RoomEventSource(object):
defer.returnValue((events, end_key))
def get_current_key(self, direction='f'):
return self.store.get_room_events_max_id(direction)
def get_current_key(self):
return self.store.get_room_events_max_id()
def get_current_key_for_room(self, room_id):
return self.store.get_room_events_max_id(room_id)
@defer.inlineCallbacks
def get_pagination_rows(self, user, config, key):

19
synapse/storage/stream.py
View file

@ -521,13 +521,20 @@ class StreamStore(SQLBaseStore):
)
@defer.inlineCallbacks
def get_room_events_max_id(self, direction='f'):
def get_room_events_max_id(self, room_id=None):
"""Returns the current token for rooms stream.
By default, it returns the current global stream token. Specifying a
`room_id` causes it to return the current room specific topological
token.
"""
token = yield self._stream_id_gen.get_current_token()
if direction != 'b':
if room_id is None:
defer.returnValue("s%d" % (token,))
else:
topo = yield self.runInteraction(
"_get_max_topological_txn", self._get_max_topological_txn
"_get_max_topological_txn", self._get_max_topological_txn,
room_id,
)
defer.returnValue("t%d-%d" % (topo, token))
@ -579,11 +586,11 @@ class StreamStore(SQLBaseStore):
lambda r: r[0][0] if r else 0
)
def _get_max_topological_txn(self, txn):
def _get_max_topological_txn(self, txn, room_id):
txn.execute(
"SELECT MAX(topological_ordering) FROM events"
" WHERE outlier = ?",
(False,)
" WHERE room_id = ?",
(room_id,)
)
rows = txn.fetchall()

30
synapse/streams/events.py
View file

@ -41,13 +41,39 @@ class EventSources(object):
self.store = hs.get_datastore()
@defer.inlineCallbacks
def get_current_token(self, direction='f'):
def get_current_token(self):
push_rules_key, _ = self.store.get_push_rules_stream_token()
to_device_key = self.store.get_to_device_stream_token()
token = StreamToken(
room_key=(
yield self.sources["room"].get_current_key(direction)
yield self.sources["room"].get_current_key()
),
presence_key=(
yield self.sources["presence"].get_current_key()
),
typing_key=(
yield self.sources["typing"].get_current_key()
),
receipt_key=(
yield self.sources["receipt"].get_current_key()
),
account_data_key=(
yield self.sources["account_data"].get_current_key()
),
push_rules_key=push_rules_key,
to_device_key=to_device_key,
)
defer.returnValue(token)
@defer.inlineCallbacks
def get_current_token_for_room(self, room_id):
push_rules_key, _ = self.store.get_push_rules_stream_token()
to_device_key = self.store.get_to_device_stream_token()
token = StreamToken(
room_key=(
yield self.sources["room"].get_current_key_for_room(room_id)
),
presence_key=(
yield self.sources["presence"].get_current_key()