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https://github.com/element-hq/synapse
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Merge pull request #1836 from matrix-org/erikj/current_state_fix
Derive current_state_events from state groups
This commit is contained in:
commit
3d9d48fffb
5 changed files with 228 additions and 212 deletions
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@ -1319,7 +1319,6 @@ class FederationHandler(BaseHandler):
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event_stream_id, max_stream_id = yield self.store.persist_event(
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event, new_event_context,
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current_state=state,
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)
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defer.returnValue((event_stream_id, max_stream_id))
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@ -429,6 +429,9 @@ def resolve_events(state_sets, state_map_factory):
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dict[(str, str), synapse.events.FrozenEvent] is a map from
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(type, state_key) to event.
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"""
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if len(state_sets) == 1:
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return state_sets[0]
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unconflicted_state, conflicted_state = _seperate(
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state_sets,
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)
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@ -235,80 +235,21 @@ class EventFederationStore(SQLBaseStore):
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],
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)
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self._update_extremeties(txn, events)
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self._update_backward_extremeties(txn, events)
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def _update_extremeties(self, txn, events):
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"""Updates the event_*_extremities tables based on the new/updated
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def _update_backward_extremeties(self, txn, events):
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"""Updates the event_backward_extremities tables based on the new/updated
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events being persisted.
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This is called for new events *and* for events that were outliers, but
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are are now being persisted as non-outliers.
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are now being persisted as non-outliers.
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Forward extremities are handled when we first start persisting the events.
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"""
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events_by_room = {}
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for ev in events:
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events_by_room.setdefault(ev.room_id, []).append(ev)
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for room_id, room_events in events_by_room.items():
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prevs = [
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e_id for ev in room_events for e_id, _ in ev.prev_events
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if not ev.internal_metadata.is_outlier()
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]
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if prevs:
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txn.execute(
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"DELETE FROM event_forward_extremities"
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" WHERE room_id = ?"
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" AND event_id in (%s)" % (
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",".join(["?"] * len(prevs)),
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),
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[room_id] + prevs,
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)
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query = (
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"INSERT INTO event_forward_extremities (event_id, room_id)"
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" SELECT ?, ? WHERE NOT EXISTS ("
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" SELECT 1 FROM event_edges WHERE prev_event_id = ?"
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" )"
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)
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txn.executemany(
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query,
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[
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(ev.event_id, ev.room_id, ev.event_id) for ev in events
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if not ev.internal_metadata.is_outlier()
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]
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)
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# We now insert into stream_ordering_to_exterm a mapping from room_id,
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# new stream_ordering to new forward extremeties in the room.
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# This allows us to later efficiently look up the forward extremeties
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# for a room before a given stream_ordering
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max_stream_ord = max(
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ev.internal_metadata.stream_ordering for ev in events
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)
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new_extrem = {}
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for room_id in events_by_room:
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event_ids = self._simple_select_onecol_txn(
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txn,
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table="event_forward_extremities",
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keyvalues={"room_id": room_id},
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retcol="event_id",
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)
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new_extrem[room_id] = event_ids
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self._simple_insert_many_txn(
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txn,
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table="stream_ordering_to_exterm",
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values=[
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{
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"room_id": room_id,
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"event_id": event_id,
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"stream_ordering": max_stream_ord,
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}
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for room_id, extrem_evs in new_extrem.items()
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for event_id in extrem_evs
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]
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)
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query = (
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"INSERT INTO event_backward_extremities (event_id, room_id)"
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" SELECT ?, ? WHERE NOT EXISTS ("
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@ -339,11 +280,6 @@ class EventFederationStore(SQLBaseStore):
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]
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)
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for room_id in events_by_room:
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txn.call_after(
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self.get_latest_event_ids_in_room.invalidate, (room_id,)
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)
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def get_forward_extremeties_for_room(self, room_id, stream_ordering):
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# We want to make the cache more effective, so we clamp to the last
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# change before the given ordering.
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@ -12,7 +12,7 @@
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from ._base import SQLBaseStore, _RollbackButIsFineException
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from ._base import SQLBaseStore
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from twisted.internet import defer, reactor
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@ -27,6 +27,7 @@ from synapse.util.logutils import log_function
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from synapse.util.metrics import Measure
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from synapse.api.constants import EventTypes
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from synapse.api.errors import SynapseError
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from synapse.state import resolve_events
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from canonicaljson import encode_canonical_json
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from collections import deque, namedtuple, OrderedDict
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@ -71,22 +72,19 @@ class _EventPeristenceQueue(object):
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"""
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_EventPersistQueueItem = namedtuple("_EventPersistQueueItem", (
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"events_and_contexts", "current_state", "backfilled", "deferred",
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"events_and_contexts", "backfilled", "deferred",
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))
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def __init__(self):
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self._event_persist_queues = {}
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self._currently_persisting_rooms = set()
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def add_to_queue(self, room_id, events_and_contexts, backfilled, current_state):
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def add_to_queue(self, room_id, events_and_contexts, backfilled):
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"""Add events to the queue, with the given persist_event options.
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"""
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queue = self._event_persist_queues.setdefault(room_id, deque())
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if queue:
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end_item = queue[-1]
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if end_item.current_state or current_state:
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# We perist events with current_state set to True one at a time
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pass
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if end_item.backfilled == backfilled:
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end_item.events_and_contexts.extend(events_and_contexts)
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return end_item.deferred.observe()
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@ -96,7 +94,6 @@ class _EventPeristenceQueue(object):
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queue.append(self._EventPersistQueueItem(
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events_and_contexts=events_and_contexts,
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backfilled=backfilled,
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current_state=current_state,
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deferred=deferred,
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))
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@ -216,7 +213,6 @@ class EventsStore(SQLBaseStore):
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d = preserve_fn(self._event_persist_queue.add_to_queue)(
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room_id, evs_ctxs,
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backfilled=backfilled,
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current_state=None,
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)
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deferreds.append(d)
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@ -229,11 +225,10 @@ class EventsStore(SQLBaseStore):
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@defer.inlineCallbacks
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@log_function
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def persist_event(self, event, context, current_state=None, backfilled=False):
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def persist_event(self, event, context, backfilled=False):
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deferred = self._event_persist_queue.add_to_queue(
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event.room_id, [(event, context)],
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backfilled=backfilled,
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current_state=current_state,
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)
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self._maybe_start_persisting(event.room_id)
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@ -246,17 +241,6 @@ class EventsStore(SQLBaseStore):
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def _maybe_start_persisting(self, room_id):
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@defer.inlineCallbacks
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def persisting_queue(item):
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if item.current_state:
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for event, context in item.events_and_contexts:
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# There should only ever be one item in
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# events_and_contexts when current_state is
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# not None
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yield self._persist_event(
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event, context,
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current_state=item.current_state,
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backfilled=item.backfilled,
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)
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else:
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yield self._persist_events(
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item.events_and_contexts,
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backfilled=item.backfilled,
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@ -294,35 +278,132 @@ class EventsStore(SQLBaseStore):
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for chunk in chunks:
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# We can't easily parallelize these since different chunks
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# might contain the same event. :(
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# NB: Assumes that we are only persisting events for one room
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# at a time.
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new_forward_extremeties = {}
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current_state_for_room = {}
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if not backfilled:
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# Work out the new "current state" for each room.
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# We do this by working out what the new extremities are and then
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# calculating the state from that.
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events_by_room = {}
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for event, context in chunk:
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events_by_room.setdefault(event.room_id, []).append(
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(event, context)
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)
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for room_id, ev_ctx_rm in events_by_room.items():
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# Work out new extremities by recursively adding and removing
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# the new events.
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latest_event_ids = yield self.get_latest_event_ids_in_room(
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room_id
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)
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new_latest_event_ids = yield self._calculate_new_extremeties(
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room_id, [ev for ev, _ in ev_ctx_rm]
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)
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if new_latest_event_ids == set(latest_event_ids):
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# No change in extremities, so no change in state
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continue
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new_forward_extremeties[room_id] = new_latest_event_ids
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# Now we need to work out the different state sets for
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# each state extremities
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state_sets = []
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missing_event_ids = []
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was_updated = False
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for event_id in new_latest_event_ids:
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# First search in the list of new events we're adding,
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# and then use the current state from that
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for ev, ctx in ev_ctx_rm:
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if event_id == ev.event_id:
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if ctx.current_state_ids is None:
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raise Exception("Unknown current state")
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state_sets.append(ctx.current_state_ids)
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if ctx.delta_ids or hasattr(ev, "state_key"):
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was_updated = True
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break
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else:
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# If we couldn't find it, then we'll need to pull
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# the state from the database
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was_updated = True
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missing_event_ids.append(event_id)
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if missing_event_ids:
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# Now pull out the state for any missing events from DB
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event_to_groups = yield self._get_state_group_for_events(
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missing_event_ids,
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)
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groups = set(event_to_groups.values())
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group_to_state = yield self._get_state_for_groups(groups)
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state_sets.extend(group_to_state.values())
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if not new_latest_event_ids or was_updated:
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current_state_for_room[room_id] = yield resolve_events(
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state_sets,
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state_map_factory=lambda ev_ids: self.get_events(
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ev_ids, get_prev_content=False, check_redacted=False,
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),
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)
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yield self.runInteraction(
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"persist_events",
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self._persist_events_txn,
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events_and_contexts=chunk,
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backfilled=backfilled,
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delete_existing=delete_existing,
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current_state_for_room=current_state_for_room,
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new_forward_extremeties=new_forward_extremeties,
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)
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persist_event_counter.inc_by(len(chunk))
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@_retry_on_integrity_error
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@defer.inlineCallbacks
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@log_function
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def _persist_event(self, event, context, current_state=None, backfilled=False,
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delete_existing=False):
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try:
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with self._stream_id_gen.get_next() as stream_ordering:
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event.internal_metadata.stream_ordering = stream_ordering
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yield self.runInteraction(
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"persist_event",
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self._persist_event_txn,
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event=event,
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context=context,
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current_state=current_state,
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backfilled=backfilled,
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delete_existing=delete_existing,
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def _calculate_new_extremeties(self, room_id, events):
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"""Calculates the new forward extremeties for a room given events to
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persist.
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Assumes that we are only persisting events for one room at a time.
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"""
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latest_event_ids = yield self.get_latest_event_ids_in_room(
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room_id
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)
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persist_event_counter.inc()
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except _RollbackButIsFineException:
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pass
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new_latest_event_ids = set(latest_event_ids)
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# First, add all the new events to the list
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new_latest_event_ids.update(
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event.event_id for event in events
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if not event.internal_metadata.is_outlier()
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)
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# Now remove all events that are referenced by the to-be-added events
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new_latest_event_ids.difference_update(
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e_id
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for event in events
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for e_id, _ in event.prev_events
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if not event.internal_metadata.is_outlier()
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)
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# And finally remove any events that are referenced by previously added
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# events.
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rows = yield self._simple_select_many_batch(
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table="event_edges",
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column="prev_event_id",
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iterable=list(new_latest_event_ids),
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retcols=["prev_event_id"],
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keyvalues={
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"room_id": room_id,
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"is_state": False,
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},
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desc="_calculate_new_extremeties",
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)
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new_latest_event_ids.difference_update(
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row["prev_event_id"] for row in rows
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)
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defer.returnValue(new_latest_event_ids)
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@defer.inlineCallbacks
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def get_event(self, event_id, check_redacted=True,
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|
@ -380,53 +461,10 @@ class EventsStore(SQLBaseStore):
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defer.returnValue({e.event_id: e for e in events})
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@log_function
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def _persist_event_txn(self, txn, event, context, current_state, backfilled=False,
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delete_existing=False):
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# We purposefully do this first since if we include a `current_state`
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# key, we *want* to update the `current_state_events` table
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if current_state:
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txn.call_after(self._get_current_state_for_key.invalidate_all)
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txn.call_after(self.get_rooms_for_user.invalidate_all)
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txn.call_after(self.get_users_in_room.invalidate, (event.room_id,))
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# Add an entry to the current_state_resets table to record the point
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# where we clobbered the current state
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stream_order = event.internal_metadata.stream_ordering
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self._simple_insert_txn(
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txn,
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table="current_state_resets",
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values={"event_stream_ordering": stream_order}
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)
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self._simple_delete_txn(
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txn,
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table="current_state_events",
|
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keyvalues={"room_id": event.room_id},
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)
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for s in current_state:
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self._simple_insert_txn(
|
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txn,
|
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"current_state_events",
|
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{
|
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"event_id": s.event_id,
|
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"room_id": s.room_id,
|
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"type": s.type,
|
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"state_key": s.state_key,
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}
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)
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|
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return self._persist_events_txn(
|
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txn,
|
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[(event, context)],
|
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backfilled=backfilled,
|
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delete_existing=delete_existing,
|
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)
|
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|
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@log_function
|
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def _persist_events_txn(self, txn, events_and_contexts, backfilled,
|
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delete_existing=False):
|
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delete_existing=False, current_state_for_room={},
|
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new_forward_extremeties={}):
|
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"""Insert some number of room events into the necessary database tables.
|
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|
||||
Rejected events are only inserted into the events table, the events_json table,
|
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|
@ -436,6 +474,80 @@ class EventsStore(SQLBaseStore):
|
|||
If delete_existing is True then existing events will be purged from the
|
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database before insertion. This is useful when retrying due to IntegrityError.
|
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"""
|
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max_stream_order = events_and_contexts[-1][0].internal_metadata.stream_ordering
|
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for room_id, current_state in current_state_for_room.iteritems():
|
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txn.call_after(self._get_current_state_for_key.invalidate_all)
|
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txn.call_after(self.get_rooms_for_user.invalidate_all)
|
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txn.call_after(self.get_users_in_room.invalidate, (room_id,))
|
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|
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# Add an entry to the current_state_resets table to record the point
|
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# where we clobbered the current state
|
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self._simple_insert_txn(
|
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txn,
|
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table="current_state_resets",
|
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values={"event_stream_ordering": max_stream_order}
|
||||
)
|
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|
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self._simple_delete_txn(
|
||||
txn,
|
||||
table="current_state_events",
|
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keyvalues={"room_id": room_id},
|
||||
)
|
||||
|
||||
self._simple_insert_many_txn(
|
||||
txn,
|
||||
table="current_state_events",
|
||||
values=[
|
||||
{
|
||||
"event_id": ev_id,
|
||||
"room_id": room_id,
|
||||
"type": key[0],
|
||||
"state_key": key[1],
|
||||
}
|
||||
for key, ev_id in current_state.iteritems()
|
||||
],
|
||||
)
|
||||
|
||||
for room_id, new_extrem in new_forward_extremeties.items():
|
||||
self._simple_delete_txn(
|
||||
txn,
|
||||
table="event_forward_extremities",
|
||||
keyvalues={"room_id": room_id},
|
||||
)
|
||||
txn.call_after(
|
||||
self.get_latest_event_ids_in_room.invalidate, (room_id,)
|
||||
)
|
||||
|
||||
self._simple_insert_many_txn(
|
||||
txn,
|
||||
table="event_forward_extremities",
|
||||
values=[
|
||||
{
|
||||
"event_id": ev_id,
|
||||
"room_id": room_id,
|
||||
}
|
||||
for room_id, new_extrem in new_forward_extremeties.items()
|
||||
for ev_id in new_extrem
|
||||
],
|
||||
)
|
||||
# We now insert into stream_ordering_to_exterm a mapping from room_id,
|
||||
# new stream_ordering to new forward extremeties in the room.
|
||||
# This allows us to later efficiently look up the forward extremeties
|
||||
# for a room before a given stream_ordering
|
||||
self._simple_insert_many_txn(
|
||||
txn,
|
||||
table="stream_ordering_to_exterm",
|
||||
values=[
|
||||
{
|
||||
"room_id": room_id,
|
||||
"event_id": event_id,
|
||||
"stream_ordering": max_stream_order,
|
||||
}
|
||||
for room_id, new_extrem in new_forward_extremeties.items()
|
||||
for event_id in new_extrem
|
||||
]
|
||||
)
|
||||
|
||||
# Ensure that we don't have the same event twice.
|
||||
# Pick the earliest non-outlier if there is one, else the earliest one.
|
||||
new_events_and_contexts = OrderedDict()
|
||||
|
@ -550,7 +662,7 @@ class EventsStore(SQLBaseStore):
|
|||
|
||||
# Update the event_backward_extremities table now that this
|
||||
# event isn't an outlier any more.
|
||||
self._update_extremeties(txn, [event])
|
||||
self._update_backward_extremeties(txn, [event])
|
||||
|
||||
events_and_contexts = [
|
||||
ec for ec in events_and_contexts if ec[0] not in to_remove
|
||||
|
@ -798,29 +910,6 @@ class EventsStore(SQLBaseStore):
|
|||
# to update the current state table
|
||||
return
|
||||
|
||||
for event, _ in state_events_and_contexts:
|
||||
if event.internal_metadata.is_outlier():
|
||||
# Outlier events shouldn't clobber the current state.
|
||||
continue
|
||||
|
||||
txn.call_after(
|
||||
self._get_current_state_for_key.invalidate,
|
||||
(event.room_id, event.type, event.state_key,)
|
||||
)
|
||||
|
||||
self._simple_upsert_txn(
|
||||
txn,
|
||||
"current_state_events",
|
||||
keyvalues={
|
||||
"room_id": event.room_id,
|
||||
"type": event.type,
|
||||
"state_key": event.state_key,
|
||||
},
|
||||
values={
|
||||
"event_id": event.event_id,
|
||||
}
|
||||
)
|
||||
|
||||
return
|
||||
|
||||
def _add_to_cache(self, txn, events_and_contexts):
|
||||
|
|
|
@ -60,7 +60,7 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
|
||||
@defer.inlineCallbacks
|
||||
def test_room_members(self):
|
||||
create = yield self.persist(type="m.room.create", key="", creator=USER_ID)
|
||||
yield self.persist(type="m.room.create", key="", creator=USER_ID)
|
||||
yield self.replicate()
|
||||
yield self.check("get_rooms_for_user", (USER_ID,), [])
|
||||
yield self.check("get_users_in_room", (ROOM_ID,), [])
|
||||
|
@ -95,15 +95,11 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
)])
|
||||
yield self.check("get_users_in_room", (ROOM_ID,), [USER_ID_2])
|
||||
|
||||
# Join the room clobbering the state.
|
||||
# This should remove any evidence of the other user being in the room.
|
||||
yield self.persist(
|
||||
type="m.room.member", key=USER_ID, membership="join",
|
||||
reset_state=[create]
|
||||
)
|
||||
yield self.replicate()
|
||||
yield self.check("get_users_in_room", (ROOM_ID,), [USER_ID])
|
||||
yield self.check("get_rooms_for_user", (USER_ID_2,), [])
|
||||
yield self.check("get_users_in_room", (ROOM_ID,), [USER_ID_2, USER_ID])
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_get_latest_event_ids_in_room(self):
|
||||
|
@ -125,7 +121,7 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
@defer.inlineCallbacks
|
||||
def test_get_current_state(self):
|
||||
# Create the room.
|
||||
create = yield self.persist(type="m.room.create", key="", creator=USER_ID)
|
||||
yield self.persist(type="m.room.create", key="", creator=USER_ID)
|
||||
yield self.replicate()
|
||||
yield self.check(
|
||||
"get_current_state_for_key", (ROOM_ID, "m.room.member", USER_ID), []
|
||||
|
@ -151,22 +147,6 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
[join2]
|
||||
)
|
||||
|
||||
# Leave the room, then rejoin the room clobbering state.
|
||||
yield self.persist(type="m.room.member", key=USER_ID, membership="leave")
|
||||
join3 = yield self.persist(
|
||||
type="m.room.member", key=USER_ID, membership="join",
|
||||
reset_state=[create]
|
||||
)
|
||||
yield self.replicate()
|
||||
yield self.check(
|
||||
"get_current_state_for_key", (ROOM_ID, "m.room.member", USER_ID_2),
|
||||
[]
|
||||
)
|
||||
yield self.check(
|
||||
"get_current_state_for_key", (ROOM_ID, "m.room.member", USER_ID),
|
||||
[join3]
|
||||
)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def test_redactions(self):
|
||||
yield self.persist(type="m.room.create", key="", creator=USER_ID)
|
||||
|
@ -283,6 +263,12 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
if depth is None:
|
||||
depth = self.event_id
|
||||
|
||||
if not prev_events:
|
||||
latest_event_ids = yield self.master_store.get_latest_event_ids_in_room(
|
||||
room_id
|
||||
)
|
||||
prev_events = [(ev_id, {}) for ev_id in latest_event_ids]
|
||||
|
||||
event_dict = {
|
||||
"sender": sender,
|
||||
"type": type,
|
||||
|
@ -309,12 +295,15 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
state_ids = {
|
||||
key: e.event_id for key, e in state.items()
|
||||
}
|
||||
else:
|
||||
state_ids = None
|
||||
|
||||
context = EventContext()
|
||||
context.current_state_ids = state_ids
|
||||
context.prev_state_ids = state_ids
|
||||
elif not backfill:
|
||||
state_handler = self.hs.get_state_handler()
|
||||
context = yield state_handler.compute_event_context(event)
|
||||
else:
|
||||
context = EventContext()
|
||||
|
||||
context.push_actions = push_actions
|
||||
|
||||
ordering = None
|
||||
|
@ -324,7 +313,7 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
|
|||
)
|
||||
else:
|
||||
ordering, _ = yield self.master_store.persist_event(
|
||||
event, context, current_state=reset_state
|
||||
event, context,
|
||||
)
|
||||
|
||||
if ordering:
|
||||
|
|
Loading…
Reference in a new issue