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Merge pull request #836 from matrix-org/erikj/change_event_cache
Change the way we cache events
This commit is contained in:
commit
3210f4c385
@ -139,6 +139,9 @@ class _EventPeristenceQueue(object):
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pass
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_EventCacheEntry = namedtuple("_EventCacheEntry", ("event", "redacted_event"))
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class EventsStore(SQLBaseStore):
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EVENT_ORIGIN_SERVER_TS_NAME = "event_origin_server_ts"
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@ -738,53 +741,65 @@ class EventsStore(SQLBaseStore):
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event_id_list = event_ids
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event_ids = set(event_ids)
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event_map = self._get_events_from_cache(
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event_entry_map = self._get_events_from_cache(
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event_ids,
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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allow_rejected=allow_rejected,
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)
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missing_events_ids = [e for e in event_ids if e not in event_map]
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missing_events_ids = [e for e in event_ids if e not in event_entry_map]
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if missing_events_ids:
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missing_events = yield self._enqueue_events(
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missing_events_ids,
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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allow_rejected=allow_rejected,
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)
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event_map.update(missing_events)
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event_entry_map.update(missing_events)
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defer.returnValue([
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event_map[e_id] for e_id in event_id_list
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if e_id in event_map and event_map[e_id]
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])
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events = []
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for event_id in event_id_list:
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entry = event_entry_map.get(event_id, None)
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if not entry:
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continue
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if allow_rejected or not entry.event.rejected_reason:
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if check_redacted and entry.redacted_event:
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event = entry.redacted_event
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else:
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event = entry.event
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events.append(event)
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if get_prev_content:
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if "replaces_state" in event.unsigned:
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prev = yield self.get_event(
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event.unsigned["replaces_state"],
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get_prev_content=False,
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allow_none=True,
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)
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if prev:
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event.unsigned = dict(event.unsigned)
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event.unsigned["prev_content"] = prev.content
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event.unsigned["prev_sender"] = prev.sender
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defer.returnValue(events)
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def _invalidate_get_event_cache(self, event_id):
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for check_redacted in (False, True):
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for get_prev_content in (False, True):
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self._get_event_cache.invalidate(
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(event_id, check_redacted, get_prev_content)
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)
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self._get_event_cache.invalidate((event_id,))
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def _get_events_from_cache(self, events, check_redacted, get_prev_content,
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allow_rejected):
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def _get_events_from_cache(self, events, allow_rejected):
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event_map = {}
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for event_id in events:
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try:
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ret = self._get_event_cache.get(
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(event_id, check_redacted, get_prev_content,)
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)
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ret = self._get_event_cache.get((event_id,), None)
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if not ret:
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continue
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if allow_rejected or not ret.rejected_reason:
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if allow_rejected or not ret.event.rejected_reason:
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event_map[event_id] = ret
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else:
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event_map[event_id] = None
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except KeyError:
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pass
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return event_map
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@ -855,8 +870,7 @@ class EventsStore(SQLBaseStore):
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reactor.callFromThread(fire, event_list)
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@defer.inlineCallbacks
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def _enqueue_events(self, events, check_redacted=True,
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get_prev_content=False, allow_rejected=False):
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def _enqueue_events(self, events, check_redacted=True, allow_rejected=False):
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"""Fetches events from the database using the _event_fetch_list. This
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allows batch and bulk fetching of events - it allows us to fetch events
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without having to create a new transaction for each request for events.
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@ -894,8 +908,6 @@ class EventsStore(SQLBaseStore):
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[
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preserve_fn(self._get_event_from_row)(
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row["internal_metadata"], row["json"], row["redacts"],
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check_redacted=check_redacted,
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get_prev_content=get_prev_content,
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rejected_reason=row["rejects"],
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)
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for row in rows
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@ -904,7 +916,7 @@ class EventsStore(SQLBaseStore):
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)
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defer.returnValue({
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e.event_id: e
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e.event.event_id: e
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for e in res if e
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})
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@ -936,7 +948,6 @@ class EventsStore(SQLBaseStore):
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@defer.inlineCallbacks
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def _get_event_from_row(self, internal_metadata, js, redacted,
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check_redacted=True, get_prev_content=False,
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rejected_reason=None):
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d = json.loads(js)
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internal_metadata = json.loads(internal_metadata)
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@ -946,26 +957,27 @@ class EventsStore(SQLBaseStore):
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table="rejections",
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keyvalues={"event_id": rejected_reason},
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retcol="reason",
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desc="_get_event_from_row",
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desc="_get_event_from_row_rejected_reason",
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)
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ev = FrozenEvent(
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original_ev = FrozenEvent(
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d,
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internal_metadata_dict=internal_metadata,
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rejected_reason=rejected_reason,
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)
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if check_redacted and redacted:
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ev = prune_event(ev)
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redacted_event = None
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if redacted:
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redacted_event = prune_event(original_ev)
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redaction_id = yield self._simple_select_one_onecol(
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table="redactions",
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keyvalues={"redacts": ev.event_id},
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keyvalues={"redacts": redacted_event.event_id},
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retcol="event_id",
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desc="_get_event_from_row",
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desc="_get_event_from_row_redactions",
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)
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ev.unsigned["redacted_by"] = redaction_id
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redacted_event.unsigned["redacted_by"] = redaction_id
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# Get the redaction event.
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because = yield self.get_event(
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@ -977,23 +989,16 @@ class EventsStore(SQLBaseStore):
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if because:
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# It's fine to do add the event directly, since get_pdu_json
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# will serialise this field correctly
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ev.unsigned["redacted_because"] = because
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redacted_event.unsigned["redacted_because"] = because
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if get_prev_content and "replaces_state" in ev.unsigned:
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prev = yield self.get_event(
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ev.unsigned["replaces_state"],
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get_prev_content=False,
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allow_none=True,
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)
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if prev:
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ev.unsigned["prev_content"] = prev.content
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ev.unsigned["prev_sender"] = prev.sender
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self._get_event_cache.prefill(
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(ev.event_id, check_redacted, get_prev_content), ev
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cache_entry = _EventCacheEntry(
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event=original_ev,
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redacted_event=redacted_event,
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)
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defer.returnValue(ev)
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self._get_event_cache.prefill((original_ev.event_id,), cache_entry)
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defer.returnValue(cache_entry)
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@defer.inlineCallbacks
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def count_daily_messages(self):
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