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Simplify cache invalidation after event persist txn (#13796)

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This moves all the invalidations into a single place and de-duplicates
the code involved in invalidating caches for a given event by using
the base class method.
This commit is contained in:
Nick Mills-Barrett 2022-09-26 16:26:35 +01:00 committed by GitHub
parent f34b0bc262
commit 6b4593a80f
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 52 additions and 119 deletions
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1
changelog.d/13796.misc Normal file
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@ -0,0 +1 @@
Use shared methods for cache invalidation when persisting events, remove duplicate codepaths. Contributed by Nick @ Beeper (@fizzadar).

3
synapse/storage/_base.py
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@ -91,6 +91,9 @@ class SQLBaseStore(metaclass=ABCMeta):
self._attempt_to_invalidate_cache(
"get_user_in_room_with_profile", (room_id, user_id)
)
self._attempt_to_invalidate_cache(
"get_rooms_for_user_with_stream_ordering", (user_id,)
)
# Purge other caches based on room state.
self._attempt_to_invalidate_cache("get_room_summary", (room_id,))

34
synapse/storage/databases/main/cache.py
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@ -223,15 +223,16 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
# process triggering the invalidation is responsible for clearing any external
# cached objects.
self._invalidate_local_get_event_cache(event_id)
self.have_seen_event.invalidate((room_id, event_id))
self.get_latest_event_ids_in_room.invalidate((room_id,))
self.get_unread_event_push_actions_by_room_for_user.invalidate((room_id,))
self._attempt_to_invalidate_cache("have_seen_event", (room_id, event_id))
self._attempt_to_invalidate_cache("get_latest_event_ids_in_room", (room_id,))
self._attempt_to_invalidate_cache(
"get_unread_event_push_actions_by_room_for_user", (room_id,)
)
# The `_get_membership_from_event_id` is immutable, except for the
# case where we look up an event *before* persisting it.
self._get_membership_from_event_id.invalidate((event_id,))
self._attempt_to_invalidate_cache("_get_membership_from_event_id", (event_id,))
if not backfilled:
self._events_stream_cache.entity_has_changed(room_id, stream_ordering)
@ -240,19 +241,26 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
self._invalidate_local_get_event_cache(redacts)
# Caches which might leak edits must be invalidated for the event being
# redacted.
self.get_relations_for_event.invalidate((redacts,))
self.get_applicable_edit.invalidate((redacts,))
self._attempt_to_invalidate_cache("get_relations_for_event", (redacts,))
self._attempt_to_invalidate_cache("get_applicable_edit", (redacts,))
if etype == EventTypes.Member:
self._membership_stream_cache.entity_has_changed(state_key, stream_ordering)
self.get_invited_rooms_for_local_user.invalidate((state_key,))
self._attempt_to_invalidate_cache(
"get_invited_rooms_for_local_user", (state_key,)
)
if relates_to:
self.get_relations_for_event.invalidate((relates_to,))
self.get_aggregation_groups_for_event.invalidate((relates_to,))
self.get_applicable_edit.invalidate((relates_to,))
self.get_thread_summary.invalidate((relates_to,))
self.get_thread_participated.invalidate((relates_to,))
self._attempt_to_invalidate_cache("get_relations_for_event", (relates_to,))
self._attempt_to_invalidate_cache(
"get_aggregation_groups_for_event", (relates_to,)
)
self._attempt_to_invalidate_cache("get_applicable_edit", (relates_to,))
self._attempt_to_invalidate_cache("get_thread_summary", (relates_to,))
self._attempt_to_invalidate_cache("get_thread_participated", (relates_to,))
self._attempt_to_invalidate_cache(
"get_mutual_event_relations_for_rel_type", (relates_to,)
)
async def invalidate_cache_and_stream(
self, cache_name: str, keys: Tuple[Any, ...]

133
synapse/storage/databases/main/events.py
View File

@ -35,7 +35,7 @@ import attr
from prometheus_client import Counter
import synapse.metrics
from synapse.api.constants import EventContentFields, EventTypes, RelationTypes
from synapse.api.constants import EventContentFields, EventTypes
from synapse.api.errors import Codes, SynapseError
from synapse.api.room_versions import RoomVersions
from synapse.events import EventBase, relation_from_event
@ -410,6 +410,31 @@ class PersistEventsStore:
assert min_stream_order
assert max_stream_order
# Once the txn completes, invalidate all of the relevant caches. Note that we do this
# up here because it captures all the events_and_contexts before any are removed.
for event, _ in events_and_contexts:
self.store.invalidate_get_event_cache_after_txn(txn, event.event_id)
if event.redacts:
self.store.invalidate_get_event_cache_after_txn(txn, event.redacts)
relates_to = None
relation = relation_from_event(event)
if relation:
relates_to = relation.parent_id
assert event.internal_metadata.stream_ordering is not None
txn.call_after(
self.store._invalidate_caches_for_event,
event.internal_metadata.stream_ordering,
event.event_id,
event.room_id,
event.type,
getattr(event, "state_key", None),
event.redacts,
relates_to,
backfilled=False,
)
self._update_forward_extremities_txn(
txn,
new_forward_extremities=new_forward_extremities,
@ -459,6 +484,7 @@ class PersistEventsStore:
# We call this last as it assumes we've inserted the events into
# room_memberships, where applicable.
# NB: This function invalidates all state related caches
self._update_current_state_txn(txn, state_delta_for_room, min_stream_order)
def _persist_event_auth_chain_txn(
@ -1172,13 +1198,6 @@ class PersistEventsStore:
)
# Invalidate the various caches
for member in members_changed:
txn.call_after(
self.store.get_rooms_for_user_with_stream_ordering.invalidate,
(member,),
)
self.store._invalidate_state_caches_and_stream(
txn, room_id, members_changed
)
@ -1222,9 +1241,6 @@ class PersistEventsStore:
self.db_pool.simple_delete_txn(
txn, table="event_forward_extremities", keyvalues={"room_id": room_id}
)
txn.call_after(
self.store.get_latest_event_ids_in_room.invalidate, (room_id,)
)
self.db_pool.simple_insert_many_txn(
txn,
@ -1294,8 +1310,6 @@ class PersistEventsStore:
"""
depth_updates: Dict[str, int] = {}
for event, context in events_and_contexts:
# Remove the any existing cache entries for the event_ids
self.store.invalidate_get_event_cache_after_txn(txn, event.event_id)
# Then update the `stream_ordering` position to mark the latest
# event as the front of the room. This should not be done for
# backfilled events because backfilled events have negative
@ -1697,16 +1711,7 @@ class PersistEventsStore:
txn.async_call_after(prefill)
def _store_redaction(self, txn: LoggingTransaction, event: EventBase) -> None:
"""Invalidate the caches for the redacted event.
Note that these caches are also cleared as part of event replication in
_invalidate_caches_for_event.
"""
assert event.redacts is not None
self.store.invalidate_get_event_cache_after_txn(txn, event.redacts)
txn.call_after(self.store.get_relations_for_event.invalidate, (event.redacts,))
txn.call_after(self.store.get_applicable_edit.invalidate, (event.redacts,))
self.db_pool.simple_upsert_txn(
txn,
table="redactions",
@ -1807,34 +1812,6 @@ class PersistEventsStore:
for event in events:
assert event.internal_metadata.stream_ordering is not None
txn.call_after(
self.store._membership_stream_cache.entity_has_changed,
event.state_key,
event.internal_metadata.stream_ordering,
)
txn.call_after(
self.store.get_invited_rooms_for_local_user.invalidate,
(event.state_key,),
)
txn.call_after(
self.store.get_local_users_in_room.invalidate,
(event.room_id,),
)
txn.call_after(
self.store.get_number_joined_users_in_room.invalidate,
(event.room_id,),
)
txn.call_after(
self.store.get_user_in_room_with_profile.invalidate,
(event.room_id, event.state_key),
)
# The `_get_membership_from_event_id` is immutable, except for the
# case where we look up an event *before* persisting it.
txn.call_after(
self.store._get_membership_from_event_id.invalidate,
(event.event_id,),
)
# We update the local_current_membership table only if the event is
# "current", i.e., its something that has just happened.
@ -1883,35 +1860,6 @@ class PersistEventsStore:
},
)
txn.call_after(
self.store.get_relations_for_event.invalidate, (relation.parent_id,)
)
txn.call_after(
self.store.get_aggregation_groups_for_event.invalidate,
(relation.parent_id,),
)
txn.call_after(
self.store.get_mutual_event_relations_for_rel_type.invalidate,
(relation.parent_id,),
)
if relation.rel_type == RelationTypes.REPLACE:
txn.call_after(
self.store.get_applicable_edit.invalidate, (relation.parent_id,)
)
if relation.rel_type == RelationTypes.THREAD:
txn.call_after(
self.store.get_thread_summary.invalidate, (relation.parent_id,)
)
# It should be safe to only invalidate the cache if the user has not
# previously participated in the thread, but that's difficult (and
# potentially error-prone) so it is always invalidated.
txn.call_after(
self.store.get_thread_participated.invalidate,
(relation.parent_id, event.sender),
)
def _handle_insertion_event(
self, txn: LoggingTransaction, event: EventBase
) -> None:
@ -2213,28 +2161,6 @@ class PersistEventsStore:
),
)
room_to_event_ids: Dict[str, List[str]] = {}
for e in non_outlier_events:
room_to_event_ids.setdefault(e.room_id, []).append(e.event_id)
for room_id, event_ids in room_to_event_ids.items():
rows = self.db_pool.simple_select_many_txn(
txn,
table="event_push_actions_staging",
column="event_id",
iterable=event_ids,
keyvalues={},
retcols=("user_id",),
)
user_ids = {row["user_id"] for row in rows}
for user_id in user_ids:
txn.call_after(
self.store.get_unread_event_push_actions_by_room_for_user.invalidate,
(room_id, user_id),
)
# Now we delete the staging area for *all* events that were being
# persisted.
txn.execute_batch(
@ -2249,11 +2175,6 @@ class PersistEventsStore:
def _remove_push_actions_for_event_id_txn(
self, txn: LoggingTransaction, room_id: str, event_id: str
) -> None:
# Sad that we have to blow away the cache for the whole room here
txn.call_after(
self.store.get_unread_event_push_actions_by_room_for_user.invalidate,
(room_id,),
)
txn.execute(
"DELETE FROM event_push_actions WHERE room_id = ? AND event_id = ?",
(room_id, event_id),