diff --git a/synapse/state.py b/synapse/state.py
index 5028b0ac49..3a0a874c9e 100644
--- a/synapse/state.py
+++ b/synapse/state.py
@@ -22,7 +22,6 @@ from synapse.util.caches.expiringcache import ExpiringCache
from synapse.util.metrics import Measure
from synapse.api.constants import EventTypes
from synapse.api.errors import AuthError
-from synapse.api.auth import AuthEventTypes
from synapse.events.snapshot import EventContext
from synapse.util.async import Linearizer
@@ -48,6 +47,8 @@ EVICTION_TIMEOUT_SECONDS = 60 * 60
_NEXT_STATE_ID = 1
+POWER_KEY = (EventTypes.PowerLevels, "")
+
def _gen_state_id():
global _NEXT_STATE_ID
@@ -332,21 +333,13 @@ class StateHandler(object):
if conflicted_state:
logger.info("Resolving conflicted state for %r", room_id)
- state_map = yield self.store.get_events(
- [e_id for st in state_groups_ids.values() for e_id in st.values()],
- get_prev_content=False
- )
- state_sets = [
- [state_map[e_id] for key, e_id in st.items() if e_id in state_map]
- for st in state_groups_ids.values()
- ]
with Measure(self.clock, "state._resolve_events"):
- new_state, _ = resolve_events(
- state_sets, event_type, state_key
+ new_state = yield resolve_events(
+ state_groups_ids.values(),
+ state_map_factory=lambda ev_ids: self.store.get_events(
+ ev_ids, get_prev_content=False, check_redacted=False,
+ ),
)
- new_state = {
- key: e.event_id for key, e in new_state.items()
- }
else:
new_state = {
key: e_ids.pop() for key, e_ids in state.items()
@@ -394,13 +387,25 @@ class StateHandler(object):
logger.info(
"Resolving state for %s with %d groups", event.room_id, len(state_sets)
)
+ state_set_ids = [{
+ (ev.type, ev.state_key): ev.event_id
+ for ev in st
+ } for st in state_sets]
+
+ state_map = {
+ ev.event_id: ev
+ for st in state_sets
+ for ev in st
+ }
+
with Measure(self.clock, "state._resolve_events"):
- if event.is_state():
- return resolve_events(
- state_sets, event.type, event.state_key
- )
- else:
- return resolve_events(state_sets)
+ new_state = resolve_events(state_set_ids, state_map)
+
+ new_state = {
+ key: state_map[ev_id] for key, ev_id in new_state.items()
+ }
+
+ return new_state
def _ordered_events(events):
@@ -410,43 +415,131 @@ def _ordered_events(events):
return sorted(events, key=key_func)
-def resolve_events(state_sets, event_type=None, state_key=""):
+def resolve_events(state_sets, state_map_factory):
"""
+ Args:
+ state_sets(list): List of dicts of (type, state_key) -> event_id,
+ which are the different state groups to resolve.
+ state_map_factory(dict|callable): If callable, then will be called
+ with a list of event_ids that are needed, and should return with
+ a Deferred of dict of event_id to event. Otherwise, should be
+ a dict from event_id to event of all events in state_sets.
+
Returns
- (dict[(str, str), synapse.events.FrozenEvent], list[str]): a tuple
- (new_state, prev_states). new_state is a map from (type, state_key)
- to event. prev_states is a list of event_ids.
+ dict[(str, str), synapse.events.FrozenEvent] is a map from
+ (type, state_key) to event.
"""
- state = {}
- for st in state_sets:
- for e in st:
- state.setdefault(
- (e.type, e.state_key),
- {}
- )[e.event_id] = e
-
- unconflicted_state = {
- k: v.values()[0] for k, v in state.items()
- if len(v.values()) == 1
- }
+ unconflicted_state, conflicted_state = _seperate(
+ state_sets,
+ )
- conflicted_state = {
- k: v.values()
- for k, v in state.items()
- if len(v.values()) > 1
- }
-
- if event_type:
- prev_states_events = conflicted_state.get(
- (event_type, state_key), []
+ if callable(state_map_factory):
+ return _resolve_with_state_fac(
+ unconflicted_state, conflicted_state, state_map_factory
)
- prev_states = [s.event_id for s in prev_states_events]
- else:
- prev_states = []
+
+ state_map = state_map_factory
+
+ auth_events = _create_auth_events_from_maps(
+ unconflicted_state, conflicted_state, state_map
+ )
+
+ return _resolve_with_state(
+ unconflicted_state, conflicted_state, auth_events, state_map
+ )
+
+
+def _seperate(state_sets):
+ """Takes the state_sets and figures out which keys are conflicted and
+ which aren't. i.e., which have multiple different event_ids associated
+ with them in different state sets.
+ """
+ unconflicted_state = dict(state_sets[0])
+ conflicted_state = {}
+
+ for state_set in state_sets[1:]:
+ for key, value in state_set.iteritems():
+ # Check if there is an unconflicted entry for the state key.
+ unconflicted_value = unconflicted_state.get(key)
+ if unconflicted_value is None:
+ # There isn't an unconflicted entry so check if there is a
+ # conflicted entry.
+ ls = conflicted_state.get(key)
+ if ls is None:
+ # There wasn't a conflicted entry so haven't seen this key before.
+ # Therefore it isn't conflicted yet.
+ unconflicted_state[key] = value
+ else:
+ # This key is already conflicted, add our value to the conflict set.
+ ls.add(value)
+ elif unconflicted_value != value:
+ # If the unconflicted value is not the same as our value then we
+ # have a new conflict. So move the key from the unconflicted_state
+ # to the conflicted state.
+ conflicted_state[key] = {value, unconflicted_value}
+ unconflicted_state.pop(key, None)
+
+ return unconflicted_state, conflicted_state
+
+
+@defer.inlineCallbacks
+def _resolve_with_state_fac(unconflicted_state, conflicted_state,
+ state_map_factory):
+ needed_events = set(
+ event_id
+ for event_ids in conflicted_state.itervalues()
+ for event_id in event_ids
+ )
+
+ logger.info("Asking for %d conflicted events", len(needed_events))
+
+ state_map = yield state_map_factory(needed_events)
+
+ auth_events = _create_auth_events_from_maps(
+ unconflicted_state, conflicted_state, state_map
+ )
+
+ new_needed_events = set(auth_events.itervalues())
+ new_needed_events -= needed_events
+
+ logger.info("Asking for %d auth events", len(new_needed_events))
+
+ state_map_new = yield state_map_factory(new_needed_events)
+ state_map.update(state_map_new)
+
+ defer.returnValue(_resolve_with_state(
+ unconflicted_state, conflicted_state, auth_events, state_map
+ ))
+
+
+def _create_auth_events_from_maps(unconflicted_state, conflicted_state, state_map):
+ auth_events = {}
+ for event_ids in conflicted_state.itervalues():
+ for event_id in event_ids:
+ if event_id in state_map:
+ keys = event_auth.auth_types_for_event(state_map[event_id])
+ for key in keys:
+ if key not in auth_events:
+ event_id = unconflicted_state.get(key, None)
+ if event_id:
+ auth_events[key] = event_id
+ return auth_events
+
+
+def _resolve_with_state(unconflicted_state_ids, conflicted_state_ds, auth_event_ids,
+ state_map):
+ conflicted_state = {}
+ for key, event_ids in conflicted_state_ds.iteritems():
+ events = [state_map[ev_id] for ev_id in event_ids if ev_id in state_map]
+ if len(events) > 1:
+ conflicted_state[key] = events
+ elif len(events) == 1:
+ unconflicted_state_ids[key] = events[0].event_id
auth_events = {
- k: e for k, e in unconflicted_state.items()
- if k[0] in AuthEventTypes
+ key: state_map[ev_id]
+ for key, ev_id in auth_event_ids.items()
+ if ev_id in state_map
}
try:
@@ -457,10 +550,11 @@ def resolve_events(state_sets, event_type=None, state_key=""):
logger.exception("Failed to resolve state")
raise
- new_state = unconflicted_state
- new_state.update(resolved_state)
+ new_state = unconflicted_state_ids
+ for key, event in resolved_state.iteritems():
+ new_state[key] = event.event_id
- return new_state, prev_states
+ return new_state
def _resolve_state_events(conflicted_state, auth_events):
@@ -474,11 +568,10 @@ def _resolve_state_events(conflicted_state, auth_events):
4. other events.
"""
resolved_state = {}
- power_key = (EventTypes.PowerLevels, "")
- if power_key in conflicted_state:
- events = conflicted_state[power_key]
+ if POWER_KEY in conflicted_state:
+ events = conflicted_state[POWER_KEY]
logger.debug("Resolving conflicted power levels %r", events)
- resolved_state[power_key] = _resolve_auth_events(
+ resolved_state[POWER_KEY] = _resolve_auth_events(
events, auth_events)
auth_events.update(resolved_state)
@@ -516,14 +609,26 @@ def _resolve_state_events(conflicted_state, auth_events):
def _resolve_auth_events(events, auth_events):
reverse = [i for i in reversed(_ordered_events(events))]
- auth_events = dict(auth_events)
+ auth_keys = set(
+ key
+ for event in events
+ for key in event_auth.auth_types_for_event(event)
+ )
+
+ new_auth_events = {}
+ for key in auth_keys:
+ auth_event = auth_events.get(key, None)
+ if auth_event:
+ new_auth_events[key] = auth_event
+
+ auth_events = new_auth_events
prev_event = reverse[0]
for event in reverse[1:]:
auth_events[(prev_event.type, prev_event.state_key)] = prev_event
try:
# The signatures have already been checked at this point
- event_auth.check(event, auth_events, do_sig_check=False)
+ event_auth.check(event, auth_events, do_sig_check=False, do_size_check=False)
prev_event = event
except AuthError:
return prev_event
@@ -535,7 +640,7 @@ def _resolve_normal_events(events, auth_events):
for event in _ordered_events(events):
try:
# The signatures have already been checked at this point
- event_auth.check(event, auth_events, do_sig_check=False)
+ event_auth.check(event, auth_events, do_sig_check=False, do_size_check=False)
return event
except AuthError:
pass
|
