diff options
| -rw-r--r-- | synapse/handlers/federation.py | 11 | ||||
| -rw-r--r-- | synapse/server.py | 6 | ||||
| -rw-r--r-- | synapse/server.pyi | 3 | ||||
| -rw-r--r-- | synapse/state.py | 161 | ||||
| -rw-r--r-- | tests/test_state.py | 4 |
5 files changed, 119 insertions, 66 deletions
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 677532c87b..8ee9434c9b 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -808,13 +808,12 @@ class FederationHandler(BaseHandler): event_ids = list(extremities.keys()) logger.debug("calling resolve_state_groups in _maybe_backfill") + resolve = logcontext.preserve_fn( + self.state_handler.resolve_state_groups_for_events + ) states = yield logcontext.make_deferred_yieldable(defer.gatherResults( - [ - logcontext.preserve_fn(self.state_handler.resolve_state_groups)( - room_id, [e] - ) - for e in event_ids - ], consumeErrors=True, + [resolve(room_id, [e]) for e in event_ids], + consumeErrors=True, )) states = dict(zip(event_ids, [s.state for s in states])) diff --git a/synapse/server.py b/synapse/server.py index ff8a8fbc46..3173aed1d0 100644 --- a/synapse/server.py +++ b/synapse/server.py @@ -66,7 +66,7 @@ from synapse.rest.media.v1.media_repository import ( MediaRepository, MediaRepositoryResource, ) -from synapse.state import StateHandler +from synapse.state import StateHandler, StateResolutionHandler from synapse.storage import DataStore from synapse.streams.events import EventSources from synapse.util import Clock @@ -102,6 +102,7 @@ class HomeServer(object): 'v1auth', 'auth', 'state_handler', + 'state_resolution_handler', 'presence_handler', 'sync_handler', 'typing_handler', @@ -224,6 +225,9 @@ class HomeServer(object): def build_state_handler(self): return StateHandler(self) + def build_state_resolution_handler(self): + return StateResolutionHandler(self) + def build_presence_handler(self): return PresenceHandler(self) diff --git a/synapse/server.pyi b/synapse/server.pyi index 41416ef252..c3a9a3847b 100644 --- a/synapse/server.pyi +++ b/synapse/server.pyi @@ -34,6 +34,9 @@ class HomeServer(object): def get_state_handler(self) -> synapse.state.StateHandler: pass + def get_state_resolution_handler(self) -> synapse.state.StateResolutionHandler: + pass + def get_deactivate_account_handler(self) -> synapse.handlers.deactivate_account.DeactivateAccountHandler: pass diff --git a/synapse/state.py b/synapse/state.py index 037f24dd79..273f9911ca 100644 --- a/synapse/state.py +++ b/synapse/state.py @@ -85,31 +85,19 @@ class _StateCacheEntry(object): class StateHandler(object): - """ Responsible for doing state conflict resolution. + """Fetches bits of state from the stores, and does state resolution + where necessary """ def __init__(self, hs): self.clock = hs.get_clock() self.store = hs.get_datastore() self.hs = hs - - # dict of set of event_ids -> _StateCacheEntry. - self._state_cache = None - self.resolve_linearizer = Linearizer(name="state_resolve_lock") + self._state_resolution_handler = hs.get_state_resolution_handler() def start_caching(self): - logger.debug("start_caching") - - self._state_cache = ExpiringCache( - cache_name="state_cache", - clock=self.clock, - max_len=SIZE_OF_CACHE, - expiry_ms=EVICTION_TIMEOUT_SECONDS * 1000, - iterable=True, - reset_expiry_on_get=True, - ) - - self._state_cache.start() + # TODO: remove this shim + self._state_resolution_handler.start_caching() @defer.inlineCallbacks def get_current_state(self, room_id, event_type=None, state_key="", @@ -131,7 +119,7 @@ class StateHandler(object): latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id) logger.debug("calling resolve_state_groups from get_current_state") - ret = yield self.resolve_state_groups(room_id, latest_event_ids) + ret = yield self.resolve_state_groups_for_events(room_id, latest_event_ids) state = ret.state if event_type: @@ -168,7 +156,7 @@ class StateHandler(object): latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id) logger.debug("calling resolve_state_groups from get_current_state_ids") - ret = yield self.resolve_state_groups(room_id, latest_event_ids) + ret = yield self.resolve_state_groups_for_events(room_id, latest_event_ids) state = ret.state defer.returnValue(state) @@ -178,7 +166,7 @@ class StateHandler(object): if not latest_event_ids: latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id) logger.debug("calling resolve_state_groups from get_current_user_in_room") - entry = yield self.resolve_state_groups(room_id, latest_event_ids) + entry = yield self.resolve_state_groups_for_events(room_id, latest_event_ids) joined_users = yield self.store.get_joined_users_from_state(room_id, entry) defer.returnValue(joined_users) @@ -187,7 +175,7 @@ class StateHandler(object): if not latest_event_ids: latest_event_ids = yield self.store.get_latest_event_ids_in_room(room_id) logger.debug("calling resolve_state_groups from get_current_hosts_in_room") - entry = yield self.resolve_state_groups(room_id, latest_event_ids) + entry = yield self.resolve_state_groups_for_events(room_id, latest_event_ids) joined_hosts = yield self.store.get_joined_hosts(room_id, entry) defer.returnValue(joined_hosts) @@ -245,7 +233,7 @@ class StateHandler(object): defer.returnValue(context) logger.debug("calling resolve_state_groups from compute_event_context") - entry = yield self.resolve_state_groups( + entry = yield self.resolve_state_groups_for_events( event.room_id, [e for e, _ in event.prev_events], ) @@ -287,8 +275,7 @@ class StateHandler(object): defer.returnValue(context) @defer.inlineCallbacks - @log_function - def resolve_state_groups(self, room_id, event_ids): + def resolve_state_groups_for_events(self, room_id, event_ids): """ Given a list of event_ids this method fetches the state at each event, resolves conflicts between them and returns them. @@ -308,13 +295,7 @@ class StateHandler(object): room_id, event_ids ) - logger.debug( - "resolve_state_groups state_groups %s", - state_groups_ids.keys() - ) - - group_names = frozenset(state_groups_ids.keys()) - if len(group_names) == 1: + if len(state_groups_ids) == 1: name, state_list = state_groups_ids.items().pop() prev_group, delta_ids = yield self.store.get_state_group_delta(name) @@ -326,6 +307,92 @@ class StateHandler(object): delta_ids=delta_ids, )) + result = yield self._state_resolution_handler.resolve_state_groups( + room_id, state_groups_ids, self._state_map_factory, + ) + defer.returnValue(result) + + def _state_map_factory(self, ev_ids): + return self.store.get_events( + ev_ids, get_prev_content=False, check_redacted=False, + ) + + def resolve_events(self, state_sets, event): + 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"): + new_state = resolve_events_with_state_map(state_set_ids, state_map) + + new_state = { + key: state_map[ev_id] for key, ev_id in new_state.items() + } + + return new_state + + +class StateResolutionHandler(object): + """Responsible for doing state conflict resolution. + + Note that the storage layer depends on this handler, so all functions must + be storage-independent. + """ + def __init__(self, hs): + self.clock = hs.get_clock() + + # dict of set of event_ids -> _StateCacheEntry. + self._state_cache = None + self.resolve_linearizer = Linearizer(name="state_resolve_lock") + + def start_caching(self): + logger.debug("start_caching") + + self._state_cache = ExpiringCache( + cache_name="state_cache", + clock=self.clock, + max_len=SIZE_OF_CACHE, + expiry_ms=EVICTION_TIMEOUT_SECONDS * 1000, + iterable=True, + reset_expiry_on_get=True, + ) + + self._state_cache.start() + + @defer.inlineCallbacks + @log_function + def resolve_state_groups(self, room_id, state_groups_ids, state_map_factory): + """Resolves conflicts between a set of state groups + + Always generates a new state group (unless we hit the cache), so should + not be called for a single state group + + Args: + room_id (str): room we are resolving for (used for logging) + state_groups_ids (dict[int, dict[(str, str), str]]): + map from state group id to the state in that state group + (where 'state' is a map from state key to event id) + + Returns: + Deferred[_StateCacheEntry]: resolved state + """ + logger.debug( + "resolve_state_groups state_groups %s", + state_groups_ids.keys() + ) + + group_names = frozenset(state_groups_ids.keys()) + with (yield self.resolve_linearizer.queue(group_names)): if self._state_cache is not None: cache = self._state_cache.get(group_names, None) @@ -356,15 +423,17 @@ class StateHandler(object): with Measure(self.clock, "state._resolve_events"): new_state = yield resolve_events_with_factory( state_groups_ids.values(), - state_map_factory=lambda ev_ids: self.store.get_events( - ev_ids, get_prev_content=False, check_redacted=False, - ), + state_map_factory=state_map_factory, ) else: new_state = { key: e_ids.pop() for key, e_ids in state.items() } + # if the new state matches any of the input state groups, we can + # use that state group again. Otherwise we will generate a state_id + # which will be used as a cache key for future resolutions, but + # not get persisted. state_group = None new_state_event_ids = frozenset(new_state.values()) for sg, events in state_groups_ids.items(): @@ -401,30 +470,6 @@ class StateHandler(object): defer.returnValue(cache) - def resolve_events(self, state_sets, event): - 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"): - new_state = resolve_events_with_state_map(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): def key_func(e): diff --git a/tests/test_state.py b/tests/test_state.py index feb84f3d48..d16e1b3b8b 100644 --- a/tests/test_state.py +++ b/tests/test_state.py @@ -19,7 +19,7 @@ from twisted.internet import defer from synapse.events import FrozenEvent from synapse.api.auth import Auth from synapse.api.constants import EventTypes, Membership -from synapse.state import StateHandler +from synapse.state import StateHandler, StateResolutionHandler from .utils import MockClock @@ -148,11 +148,13 @@ class StateTestCase(unittest.TestCase): ) hs = Mock(spec_set=[ "get_datastore", "get_auth", "get_state_handler", "get_clock", + "get_state_resolution_handler", ]) hs.get_datastore.return_value = self.store hs.get_state_handler.return_value = None hs.get_clock.return_value = MockClock() hs.get_auth.return_value = Auth(hs) + hs.get_state_resolution_handler = lambda: StateResolutionHandler(hs) self.store.get_next_state_group.side_effect = Mock self.store.get_state_group_delta.return_value = (None, None) |