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Refactor backfilled
into specific behavior function arguments (_persist_events_and_state_updates
) (#11417)
Part of https://github.com/matrix-org/synapse/issues/11300 Call stack: - `_persist_events_and_state_updates` (added `use_negative_stream_ordering`) - `_persist_events_txn` - `_update_room_depths_txn` (added `update_room_forward_stream_ordering`) - `_update_metadata_tables_txn` - `_store_room_members_txn` (added `inhibit_local_membership_updates`) Using keyword-only arguments (`*`) to reduce the mistakes from `backfilled` being left as a positional argument somewhere and being interpreted wrong by our new arguments.
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changelog.d/11417.misc
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changelog.d/11417.misc
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Refactor `backfilled` into specific behavior function arguments (`_persist_events_and_state_updates` and downstream calls).
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@ -124,10 +124,12 @@ class PersistEventsStore:
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async def _persist_events_and_state_updates(
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self,
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events_and_contexts: List[Tuple[EventBase, EventContext]],
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*,
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current_state_for_room: Dict[str, StateMap[str]],
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state_delta_for_room: Dict[str, DeltaState],
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new_forward_extremeties: Dict[str, List[str]],
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backfilled: bool = False,
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use_negative_stream_ordering: bool = False,
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inhibit_local_membership_updates: bool = False,
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) -> None:
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"""Persist a set of events alongside updates to the current state and
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forward extremities tables.
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@ -140,7 +142,14 @@ class PersistEventsStore:
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room state
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new_forward_extremities: Map from room_id to list of event IDs
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that are the new forward extremities of the room.
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backfilled
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use_negative_stream_ordering: Whether to start stream_ordering on
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the negative side and decrement. This should be set as True
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for backfilled events because backfilled events get a negative
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stream ordering so they don't come down incremental `/sync`.
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inhibit_local_membership_updates: Stop the local_current_membership
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from being updated by these events. This should be set to True
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for backfilled events because backfilled events in the past do
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not affect the current local state.
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Returns:
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Resolves when the events have been persisted
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@ -162,7 +171,7 @@ class PersistEventsStore:
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#
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# Note: Multiple instances of this function cannot be in flight at
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# the same time for the same room.
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if backfilled:
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if use_negative_stream_ordering:
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stream_ordering_manager = self._backfill_id_gen.get_next_mult(
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len(events_and_contexts)
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)
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@ -179,13 +188,13 @@ class PersistEventsStore:
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"persist_events",
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self._persist_events_txn,
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events_and_contexts=events_and_contexts,
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backfilled=backfilled,
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inhibit_local_membership_updates=inhibit_local_membership_updates,
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state_delta_for_room=state_delta_for_room,
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new_forward_extremeties=new_forward_extremeties,
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)
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persist_event_counter.inc(len(events_and_contexts))
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if not backfilled:
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if stream < 0:
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# backfilled events have negative stream orderings, so we don't
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# want to set the event_persisted_position to that.
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synapse.metrics.event_persisted_position.set(
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@ -319,8 +328,9 @@ class PersistEventsStore:
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def _persist_events_txn(
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self,
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txn: LoggingTransaction,
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*,
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events_and_contexts: List[Tuple[EventBase, EventContext]],
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backfilled: bool,
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inhibit_local_membership_updates: bool = False,
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state_delta_for_room: Optional[Dict[str, DeltaState]] = None,
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new_forward_extremeties: Optional[Dict[str, List[str]]] = None,
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):
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@ -333,7 +343,10 @@ class PersistEventsStore:
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Args:
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txn
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events_and_contexts: events to persist
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backfilled: True if the events were backfilled
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inhibit_local_membership_updates: Stop the local_current_membership
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from being updated by these events. This should be set to True
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for backfilled events because backfilled events in the past do
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not affect the current local state.
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delete_existing True to purge existing table rows for the events
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from the database. This is useful when retrying due to
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IntegrityError.
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@ -366,9 +379,7 @@ class PersistEventsStore:
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events_and_contexts
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)
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self._update_room_depths_txn(
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txn, events_and_contexts=events_and_contexts, backfilled=backfilled
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)
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self._update_room_depths_txn(txn, events_and_contexts=events_and_contexts)
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# _update_outliers_txn filters out any events which have already been
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# persisted, and returns the filtered list.
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@ -401,7 +412,7 @@ class PersistEventsStore:
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txn,
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events_and_contexts=events_and_contexts,
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all_events_and_contexts=all_events_and_contexts,
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backfilled=backfilled,
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inhibit_local_membership_updates=inhibit_local_membership_updates,
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)
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# We call this last as it assumes we've inserted the events into
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@ -1203,7 +1214,6 @@ class PersistEventsStore:
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self,
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txn,
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events_and_contexts: List[Tuple[EventBase, EventContext]],
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backfilled: bool,
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):
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"""Update min_depth for each room
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@ -1211,13 +1221,18 @@ class PersistEventsStore:
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txn (twisted.enterprise.adbapi.Connection): db connection
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events_and_contexts (list[(EventBase, EventContext)]): events
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we are persisting
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backfilled (bool): True if the events were backfilled
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"""
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depth_updates: Dict[str, int] = {}
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for event, context in events_and_contexts:
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# Remove the any existing cache entries for the event_ids
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txn.call_after(self.store._invalidate_get_event_cache, event.event_id)
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if not backfilled:
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# Then update the `stream_ordering` position to mark the latest
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# event as the front of the room. This should not be done for
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# backfilled events because backfilled events have negative
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# stream_ordering and happened in the past so we know that we don't
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# need to update the stream_ordering tip/front for the room.
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assert event.internal_metadata.stream_ordering is not None
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if event.internal_metadata.stream_ordering >= 0:
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txn.call_after(
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self.store._events_stream_cache.entity_has_changed,
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event.room_id,
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@ -1430,7 +1445,12 @@ class PersistEventsStore:
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return [ec for ec in events_and_contexts if ec[0] not in to_remove]
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def _update_metadata_tables_txn(
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self, txn, events_and_contexts, all_events_and_contexts, backfilled
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self,
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txn,
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*,
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events_and_contexts,
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all_events_and_contexts,
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inhibit_local_membership_updates: bool = False,
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):
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"""Update all the miscellaneous tables for new events
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@ -1442,7 +1462,10 @@ class PersistEventsStore:
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events that we were going to persist. This includes events
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we've already persisted, etc, that wouldn't appear in
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events_and_context.
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backfilled (bool): True if the events were backfilled
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inhibit_local_membership_updates: Stop the local_current_membership
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from being updated by these events. This should be set to True
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for backfilled events because backfilled events in the past do
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not affect the current local state.
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"""
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# Insert all the push actions into the event_push_actions table.
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@ -1516,7 +1539,7 @@ class PersistEventsStore:
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for event, _ in events_and_contexts
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if event.type == EventTypes.Member
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],
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backfilled=backfilled,
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inhibit_local_membership_updates=inhibit_local_membership_updates,
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)
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# Insert event_reference_hashes table.
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@ -1643,8 +1666,19 @@ class PersistEventsStore:
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txn, table="event_reference_hashes", values=vals
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)
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def _store_room_members_txn(self, txn, events, backfilled):
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"""Store a room member in the database."""
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def _store_room_members_txn(
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self, txn, events, *, inhibit_local_membership_updates: bool = False
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):
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"""
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Store a room member in the database.
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Args:
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txn: The transaction to use.
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events: List of events to store.
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inhibit_local_membership_updates: Stop the local_current_membership
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from being updated by these events. This should be set to True
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for backfilled events because backfilled events in the past do
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not affect the current local state.
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"""
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def non_null_str_or_none(val: Any) -> Optional[str]:
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return val if isinstance(val, str) and "\u0000" not in val else None
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@ -1687,7 +1721,7 @@ class PersistEventsStore:
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# band membership", like a remote invite or a rejection of a remote invite.
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if (
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self.is_mine_id(event.state_key)
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and not backfilled
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and not inhibit_local_membership_updates
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and event.internal_metadata.is_outlier()
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and event.internal_metadata.is_out_of_band_membership()
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):
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@ -583,7 +583,8 @@ class EventsPersistenceStorage:
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current_state_for_room=current_state_for_room,
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state_delta_for_room=state_delta_for_room,
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new_forward_extremeties=new_forward_extremeties,
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backfilled=backfilled,
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use_negative_stream_ordering=backfilled,
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inhibit_local_membership_updates=backfilled,
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)
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await self._handle_potentially_left_users(potentially_left_users)
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