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When we see a difference in current state, actually use state conflict resolution algorithm

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This commit is contained in:
Erik Johnston 2015-02-13 14:20:05 +00:00
parent 6375abcdac
commit 8c652a2b5f
2 changed files with 63 additions and 14 deletions
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34
synapse/handlers/federation.py
View File

@ -858,6 +858,40 @@ class FederationHandler(BaseHandler):
# Do auth conflict res.
logger.debug("Different auth: %s", different_auth)
different_events = yield defer.gatherResults(
[
self.store.get_event(
d,
allow_none=True,
allow_rejected=False,
)
for d in different_auth
if d in have_events and not have_events[d]
],
consumeErrors=True
)
if different_events:
local_view = dict(auth_events)
remote_view = dict(auth_events)
remote_view.update({
(d.type, d.state_key) for d in different_events
})
new_state, _ = self.state.resolve_events(
[local_view, remote_view],
event
)
auth_events.update(new_state)
current_state = set(e.event_id for e in auth_events.values())
different_auth = event_auth_events - current_state
context.current_state.update(auth_events)
context.state_group = None
if different_auth and not event.internal_metadata.is_outlier():
# Only do auth resolution if we have something new to say.
# We can't rove an auth failure.
do_resolution = False

43
synapse/state.py
View File

@ -259,13 +259,37 @@ class StateHandler(object):
defer.returnValue((name, state, prev_states))
new_state, prev_states = self._resolve_events(
state_groups.values(), event_type, state_key
)
if self._state_cache is not None:
cache = _StateCacheEntry(
state=new_state,
state_group=None,
ts=self.clock.time_msec()
)
self._state_cache[frozenset(event_ids)] = cache
defer.returnValue((None, new_state, prev_states))
def resolve_events(self, state_sets, event):
if event.is_state():
return self._resolve_events(
state_sets, event.type, event.state_key
)
else:
return self._resolve_events(state_sets)
def _resolve_events(self, state_sets, event_type=None, state_key=""):
state = {}
for group, g_state in state_groups.items():
for s in g_state:
for st in state_sets:
for e in st:
state.setdefault(
(s.type, s.state_key),
(e.type, e.state_key),
{}
)[s.event_id] = s
)[e.event_id] = e
unconflicted_state = {
k: v.values()[0] for k, v in state.items()
@ -302,16 +326,7 @@ class StateHandler(object):
new_state = unconflicted_state
new_state.update(resolved_state)
if self._state_cache is not None:
cache = _StateCacheEntry(
state=new_state,
state_group=None,
ts=self.clock.time_msec()
)
self._state_cache[frozenset(event_ids)] = cache
defer.returnValue((None, new_state, prev_states))
return new_state, prev_states
@log_function
def _resolve_state_events(self, conflicted_state, auth_events):