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Diffstat (limited to 'synapse/storage/stream.py')
| -rw-r--r-- | synapse/storage/stream.py | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py index 5763c462af..3cab06fdef 100644 --- a/synapse/storage/stream.py +++ b/synapse/storage/stream.py @@ -386,7 +386,24 @@ class StreamStore(SQLBaseStore): table="events", keyvalues={"event_id": event_id}, retcol="stream_ordering", - ).addCallback(lambda stream_ordering: "s%d" % (stream_ordering,)) + ).addCallback(lambda row: "s%d" % (row,)) + + def get_topological_token_for_event(self, event_id): + """The stream token for an event + Args: + event_id(str): The id of the event to look up a stream token for. + Raises: + StoreError if the event wasn't in the database. + Returns: + A deferred "t%d-%d" topological token. + """ + return self._simple_select_one( + table="events", + keyvalues={"event_id": event_id}, + retcols=("stream_ordering", "topological_ordering"), + ).addCallback(lambda row: "t%d-%d" % ( + row["topological_ordering"], row["stream_ordering"],) + ) def _get_max_topological_txn(self, txn): txn.execute( |