Load the current id in the IdGenerator constructor

Rather than loading them lazily. This allows us to remove all
the yield statements and spurious arguments for the get_next
methods.

It also allows us to replace all instances of get_next_txn with
get_next since get_next no longer needs to access the db.

1 files changed, 2 insertions, 2 deletions

diff --git a/synapse/storage/receipts.py b/synapse/storage/receipts.py

index a7343c97f7..cd6dca4901 100644
--- a/synapse/storage/receipts.py
+++ b/synapse/storage/receipts.py
@@ -330,7 +330,7 @@ class ReceiptsStore(SQLBaseStore):
                 "insert_receipt_conv", graph_to_linear
             )
 
-        stream_id_manager = yield self._receipts_id_gen.get_next(self)
+        stream_id_manager = self._receipts_id_gen.get_next()
         with stream_id_manager as stream_id:
             have_persisted = yield self.runInteraction(
                 "insert_linearized_receipt",
@@ -347,7 +347,7 @@ class ReceiptsStore(SQLBaseStore):
             room_id, receipt_type, user_id, event_ids, data
         )
 
-        max_persisted_id = yield self._stream_id_gen.get_max_token()
+        max_persisted_id = self._stream_id_gen.get_max_token()
 
         defer.returnValue((stream_id, max_persisted_id))