Add a simple hook to wait for replication traffic

1 files changed, 6 insertions, 0 deletions

diff --git a/synapse/notifier.py b/synapse/notifier.py

index 7eeba6d28e..f9fcc0ca25 100644
--- a/synapse/notifier.py
+++ b/synapse/notifier.py
@@ -550,3 +550,9 @@ class Notifier(object):
                 break
 
         defer.returnValue(result)
+
+    def wait_once_for_replication(self):
+        """Returns a deferred which resolves when there is new data for
+        replication to handle.
+        """
+        return self.replication_deferred.observe()