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Merge pull request #4040 from matrix-org/erikj/states_res_v2_rebase

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Add v2 state resolution algorithm
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Erik Johnston 2018-10-24 11:12:12 +01:00 • committed by GitHub
commit 3904cbf307
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9 changed files with 1323 additions and 61 deletions
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30
synapse/handlers/federation.py
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@ -53,7 +53,7 @@ from synapse.replication.http.federation import (
ReplicationFederationSendEventsRestServlet,
)
from synapse.replication.http.membership import ReplicationUserJoinedLeftRoomRestServlet
from synapse.state import resolve_events_with_factory
from synapse.state import StateResolutionStore, resolve_events_with_store
from synapse.types import UserID, get_domain_from_id
from synapse.util import logcontext, unwrapFirstError
from synapse.util.async_helpers import Linearizer
@ -384,24 +384,24 @@ class FederationHandler(BaseHandler):
for x in remote_state:
event_map[x.event_id] = x
# Resolve any conflicting state
@defer.inlineCallbacks
def fetch(ev_ids):
fetched = yield self.store.get_events(
ev_ids, get_prev_content=False, check_redacted=False,
)
# add any events we fetch here to the `event_map` so that we
# can use them to build the state event list below.
event_map.update(fetched)
defer.returnValue(fetched)
room_version = yield self.store.get_room_version(room_id)
state_map = yield resolve_events_with_factory(
room_version, state_maps, event_map, fetch,
state_map = yield resolve_events_with_store(
room_version, state_maps, event_map,
state_res_store=StateResolutionStore(self.store),
)
# we need to give _process_received_pdu the actual state events
# We need to give _process_received_pdu the actual state events
# rather than event ids, so generate that now.
# First though we need to fetch all the events that are in
# state_map, so we can build up the state below.
evs = yield self.store.get_events(
list(state_map.values()),
get_prev_content=False,
check_redacted=False,
)
event_map.update(evs)
state = [
event_map[e] for e in six.itervalues(state_map)
]