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-rw-r--r--synapse/replication/tcp/client.py17
-rw-r--r--synapse/replication/tcp/streams/events.py1
2 files changed, 17 insertions, 1 deletions
diff --git a/synapse/replication/tcp/client.py b/synapse/replication/tcp/client.py
index 2f59245058..e4f2201c92 100644
--- a/synapse/replication/tcp/client.py
+++ b/synapse/replication/tcp/client.py
@@ -21,7 +21,7 @@ from twisted.internet.interfaces import IAddress, IConnector
 from twisted.internet.protocol import ReconnectingClientFactory
 from twisted.python.failure import Failure
 
-from synapse.api.constants import EventTypes, ReceiptTypes
+from synapse.api.constants import EventTypes, Membership, ReceiptTypes
 from synapse.federation import send_queue
 from synapse.federation.sender import FederationSender
 from synapse.logging.context import PreserveLoggingContext, make_deferred_yieldable
@@ -219,6 +219,21 @@ class ReplicationDataHandler:
                     membership=row.data.membership,
                 )
 
+                # If this event is a join, make a note of it so we have an accurate
+                # cross-worker room rate limit.
+                # TODO: Erik said we should exclude rows that came from ex_outliers
+                #  here, but I don't see how we can determine that. I guess we could
+                #  add a flag to row.data?
+                if (
+                    row.data.type == EventTypes.Member
+                    and row.data.membership == Membership.JOIN
+                    and not row.data.outlier
+                ):
+                    # TODO retrieve the previous state, and exclude join -> join transitions
+                    self.notifier.notify_user_joined_room(
+                        row.data.event_id, row.data.room_id
+                    )
+
         await self._presence_handler.process_replication_rows(
             stream_name, instance_name, token, rows
         )
diff --git a/synapse/replication/tcp/streams/events.py b/synapse/replication/tcp/streams/events.py
index 26f4fa7cfd..14b6705862 100644
--- a/synapse/replication/tcp/streams/events.py
+++ b/synapse/replication/tcp/streams/events.py
@@ -98,6 +98,7 @@ class EventsStreamEventRow(BaseEventsStreamRow):
     relates_to: Optional[str]
     membership: Optional[str]
     rejected: bool
+    outlier: bool
 
 
 @attr.s(slots=True, frozen=True, auto_attribs=True)