diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/storage/events.py | 77 |
1 files changed, 41 insertions, 36 deletions
diff --git a/synapse/storage/events.py b/synapse/storage/events.py index 07e873fce4..9f8f0a0823 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -19,7 +19,7 @@ from twisted.internet import defer, reactor from synapse.events import FrozenEvent, USE_FROZEN_DICTS from synapse.events.utils import prune_event -from synapse.util.async import ObservableDeferred +from synapse.util.async import ObservableDeferred, run_on_reactor from synapse.util.logcontext import preserve_fn, PreserveLoggingContext from synapse.util.logutils import log_function from synapse.api.constants import EventTypes @@ -89,12 +89,14 @@ class _EventPeristenceQueue(object): return deferred.observe() - def handle_queue(self, room_id, callback): + def handle_queue(self, room_id, per_item_callback): """Attempts to handle the queue for a room if not already being handled. - The given callback will be invoked with a 'queue' arg, which is a - generator over _EventPersistQueueItem's. The queue will finish if there - are no longer any items in the room queue. + The given callback will be invoked with for each item in the queue,1 + of type _EventPersistQueueItem. The per_item_callback will continuously + be called with new items, unless the queue becomnes empty. The return + value of the function will be given to the deferreds waiting on the item, + exceptions will be passed to the deferres as well. This function should therefore be called whenever anything is added to the queue. @@ -108,15 +110,26 @@ class _EventPeristenceQueue(object): self._currently_persisting_rooms.add(room_id) - try: - callback(self._get_drainining_queue(room_id)) - finally: - self._currently_persisting_rooms.discard(room_id) + @defer.inlineCallbacks + def handle_queue_loop(): + try: + queue = self._get_drainining_queue(room_id) + for item in queue: + try: + ret = yield per_item_callback(item) + item.deferred.callback(ret) + except Exception as e: + item.deferred.errback(e) + finally: + queue = self._event_persist_queues.pop(room_id, None) + if queue: + self._event_persist_queues[room_id] = queue + self._currently_persisting_rooms.discard(room_id) + + preserve_fn(handle_queue_loop)() def _get_drainining_queue(self, room_id): - queue = self._event_persist_queues.pop(room_id, None) - if not queue: - return + queue = self._event_persist_queues.setdefault(room_id, deque()) try: while True: @@ -180,30 +193,22 @@ class EventsStore(SQLBaseStore): def _maybe_start_persisting(self, room_id): @defer.inlineCallbacks - def persisting_queue(queue): - for item in queue: - try: - ret = None - if item.current_state: - for event, context in item.events_and_contexts: - # There should only ever be one item in - # events_and_contexts when current_state is - # not None - yield self._persist_event( - event, context, - current_state=item.current_state, - backfilled=item.backfilled, - ) - else: - yield self._persist_events( - item.events_and_contexts, - backfilled=item.backfilled, - ) - logger.info("Resolving with ret: %r", ret) - item.deferred.callback(ret) - except Exception as e: - logger.exception("Failed to persist events") - item.deferred.errback(e) + def persisting_queue(item): + if item.current_state: + for event, context in item.events_and_contexts: + # There should only ever be one item in + # events_and_contexts when current_state is + # not None + yield self._persist_event( + event, context, + current_state=item.current_state, + backfilled=item.backfilled, + ) + else: + yield self._persist_events( + item.events_and_contexts, + backfilled=item.backfilled, + ) self._event_persist_queue.handle_queue(room_id, persisting_queue) |