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Faster joins: persist to database (#12012)

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When we get a partial_state response from send_join, store information in the
database about it:
 * store a record about the room as a whole having partial state, and stash the
   list of member servers too.
 * flag the join event itself as having partial state
 * also, for any new events whose prev-events are partial-stated, note that
   they will *also* be partial-stated.

We don't yet make any attempt to interpret this data, so API calls (and a bunch
of other things) are just going to get incorrect data.
This commit is contained in:
Richard van der Hoff 2022-03-01 12:49:54 +00:00 • committed by GitHub
parent 4ccc2d09aa
commit e2e1d90a5e
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12 changed files with 297 additions and 32 deletions
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9
synapse/events/snapshot.py
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@ -101,6 +101,9 @@ class EventContext:
As with _current_state_ids, this is a private attribute. It should be
accessed via get_prev_state_ids.
partial_state: if True, we may be storing this event with a temporary,
incomplete state.
"""
rejected: Union[bool, str] = False
@ -113,12 +116,15 @@ class EventContext:
_current_state_ids: Optional[StateMap[str]] = None
_prev_state_ids: Optional[StateMap[str]] = None
partial_state: bool = False
@staticmethod
def with_state(
state_group: Optional[int],
state_group_before_event: Optional[int],
current_state_ids: Optional[StateMap[str]],
prev_state_ids: Optional[StateMap[str]],
partial_state: bool,
prev_group: Optional[int] = None,
delta_ids: Optional[StateMap[str]] = None,
) -> "EventContext":
@ -129,6 +135,7 @@ class EventContext:
state_group_before_event=state_group_before_event,
prev_group=prev_group,
delta_ids=delta_ids,
partial_state=partial_state,
)
@staticmethod
@ -170,6 +177,7 @@ class EventContext:
"prev_group": self.prev_group,
"delta_ids": _encode_state_dict(self.delta_ids),
"app_service_id": self.app_service.id if self.app_service else None,
"partial_state": self.partial_state,
}
@staticmethod
@ -196,6 +204,7 @@ class EventContext:
prev_group=input["prev_group"],
delta_ids=_decode_state_dict(input["delta_ids"]),
rejected=input["rejected"],
partial_state=input.get("partial_state", False),
)
app_service_id = input["app_service_id"]