From 76d21d14a042756b0c8a8f520dfd9ea09cf092c7 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Wed, 19 Aug 2020 10:39:31 +0100 Subject: Separate `get_current_token` into two. (#8113) The function is used for two purposes: 1) for subscribers of streams to get a token they can use to get further updates with, and 2) for replication to track position of the writers of the stream. For streams with a single writer the two scenarios produce the same result, however the situation becomes complicated for streams with multiple writers. The current `MultiWriterIdGenerator` does not correctly handle the first case (which is not an issue as its only used for the `caches` stream which nothing subscribes to outside of replication). --- synapse/replication/slave/storage/_slaved_id_tracker.py | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'synapse/replication/slave/storage') diff --git a/synapse/replication/slave/storage/_slaved_id_tracker.py b/synapse/replication/slave/storage/_slaved_id_tracker.py index 9d1d173b2f..d43eaf3a29 100644 --- a/synapse/replication/slave/storage/_slaved_id_tracker.py +++ b/synapse/replication/slave/storage/_slaved_id_tracker.py @@ -33,3 +33,11 @@ class SlavedIdTracker(object): int """ return self._current + + def get_current_token_for_writer(self, instance_name: str) -> int: + """Returns the position of the given writer. + + For streams with single writers this is equivalent to + `get_current_token`. + """ + return self.get_current_token() -- cgit 1.5.1