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Add ReadWriteLock for pagination and history prune

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This commit is contained in:
Erik Johnston 2016-07-05 15:30:25 +01:00
parent 7335f0adda
commit 8f8798bc0d
2 changed files with 41 additions and 39 deletions
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10
synapse/handlers/message.py
View File

@ -26,7 +26,7 @@ from synapse.types import (
UserID, RoomAlias, RoomStreamToken, StreamToken, get_domain_from_id
)
from synapse.util import unwrapFirstError
from synapse.util.async import concurrently_execute, run_on_reactor
from synapse.util.async import concurrently_execute, run_on_reactor, ReadWriteLock
from synapse.util.caches.snapshot_cache import SnapshotCache
from synapse.util.logcontext import preserve_fn
from synapse.visibility import filter_events_for_client
@ -50,6 +50,8 @@ class MessageHandler(BaseHandler):
self.validator = EventValidator()
self.snapshot_cache = SnapshotCache()
self.pagination_lock = ReadWriteLock()
@defer.inlineCallbacks
def purge_history(self, room_id, event_id):
event = yield self.store.get_event(event_id)
@ -59,8 +61,7 @@ class MessageHandler(BaseHandler):
depth = event.depth
# TODO: Lock.
with (yield self.pagination_lock.write(room_id)):
yield self.store.delete_old_state(room_id, depth)
@defer.inlineCallbacks
@ -98,6 +99,7 @@ class MessageHandler(BaseHandler):
source_config = pagin_config.get_source_config("room")
with (yield self.pagination_lock.read(room_id)):
membership, member_event_id = yield self._check_in_room_or_world_readable(
room_id, user_id
)
@ -108,7 +110,7 @@ class MessageHandler(BaseHandler):
if room_token.topological:
max_topo = room_token.topological
else:
max_topo = yield self.store.get_max_topological_token_for_stream_and_room(
max_topo = yield self.store.get_max_topological_token(
room_id, room_token.stream
)

4
synapse/storage/stream.py
View File

@ -487,13 +487,13 @@ class StreamStore(SQLBaseStore):
row["topological_ordering"], row["stream_ordering"],)
)
def get_max_topological_token_for_stream_and_room(self, room_id, stream_key):
def get_max_topological_token(self, room_id, stream_key):
sql = (
"SELECT max(topological_ordering) FROM events"
" WHERE room_id = ? AND stream_ordering < ?"
)
return self._execute(
"get_max_topological_token_for_stream_and_room", None,
"get_max_topological_token", None,
sql, room_id, stream_key,
).addCallback(
lambda r: r[0][0] if r else 0