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Define StateMap as immutable and add a MutableStateMap type. (#8183)

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Patrick Cloke 2020-08-28 07:28:53 -04:00 • committed by GitHub
parent 2c2e649be2
commit d5e73cb6aa
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8 changed files with 52 additions and 32 deletions
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32
synapse/state/__init__.py
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@ -25,6 +25,7 @@ from typing import (
Sequence,
Set,
Union,
cast,
overload,
)
@ -41,7 +42,7 @@ from synapse.logging.utils import log_function
from synapse.state import v1, v2
from synapse.storage.databases.main.events_worker import EventRedactBehaviour
from synapse.storage.roommember import ProfileInfo
from synapse.types import Collection, StateMap
from synapse.types import Collection, MutableStateMap, StateMap
from synapse.util import Clock
from synapse.util.async_helpers import Linearizer
from synapse.util.caches.expiringcache import ExpiringCache
@ -205,7 +206,7 @@ class StateHandler(object):
logger.debug("calling resolve_state_groups from get_current_state_ids")
ret = await self.resolve_state_groups_for_events(room_id, latest_event_ids)
return dict(ret.state)
return ret.state
async def get_current_users_in_room(
self, room_id: str, latest_event_ids: Optional[List[str]] = None
@ -302,7 +303,7 @@ class StateHandler(object):
# if we're given the state before the event, then we use that
state_ids_before_event = {
(s.type, s.state_key): s.event_id for s in old_state
}
} # type: StateMap[str]
state_group_before_event = None
state_group_before_event_prev_group = None
deltas_to_state_group_before_event = None
@ -315,7 +316,7 @@ class StateHandler(object):
event.room_id, event.prev_event_ids()
)
state_ids_before_event = dict(entry.state)
state_ids_before_event = entry.state
state_group_before_event = entry.state_group
state_group_before_event_prev_group = entry.prev_group
deltas_to_state_group_before_event = entry.delta_ids
@ -540,7 +541,7 @@ class StateResolutionHandler(object):
#
# XXX: is this actually worthwhile, or should we just let
# resolve_events_with_store do it?
new_state = {}
new_state = {} # type: MutableStateMap[str]
conflicted_state = False
for st in state_groups_ids.values():
for key, e_id in st.items():
@ -554,13 +555,20 @@ class StateResolutionHandler(object):
if conflicted_state:
logger.info("Resolving conflicted state for %r", room_id)
with Measure(self.clock, "state._resolve_events"):
new_state = await resolve_events_with_store(
self.clock,
room_id,
room_version,
list(state_groups_ids.values()),
event_map=event_map,
state_res_store=state_res_store,
# resolve_events_with_store returns a StateMap, but we can
# treat it as a MutableStateMap as it is above. It isn't
# actually mutated anymore (and is frozen in
# _make_state_cache_entry below).
new_state = cast(
MutableStateMap,
await resolve_events_with_store(
self.clock,
room_id,
room_version,
list(state_groups_ids.values()),
event_map=event_map,
state_res_store=state_res_store,
),
)
# if the new state matches any of the input state groups, we can