From ad0ccf15ea35603c9453523acb3f43661fdbaa12 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Tue, 20 Feb 2018 12:29:50 +0000
Subject: [PATCH] Refactor _set_push_actions_for_event_and_users_txn to use
 events_and_contexts

---
 synapse/storage/event_push_actions.py | 65 +++++++++++++++------------
 synapse/storage/events.py             | 11 ++---
 2 files changed, 42 insertions(+), 34 deletions(-)

diff --git a/synapse/storage/event_push_actions.py b/synapse/storage/event_push_actions.py
index f787431b7a..dac3505480 100644
--- a/synapse/storage/event_push_actions.py
+++ b/synapse/storage/event_push_actions.py
@@ -88,11 +88,13 @@ class EventPushActionsStore(SQLBaseStore):
             self._rotate_notifs, 30 * 60 * 1000
         )
 
-    def _set_push_actions_for_event_and_users_txn(self, txn, event):
-        """
+    def _set_push_actions_for_event_and_users_txn(self, txn, events_and_contexts):
+        """Handles moving push actions from staging table to main
+        event_push_actions table for all events in `events_and_contexts`.
+
         Args:
-            event: the event set actions for
-            tuples: list of tuples of (user_id, actions)
+            events_and_contexts (list[(EventBase, EventContext)]): events
+                we are persisting
         """
 
         sql = """
@@ -105,34 +107,39 @@ class EventPushActionsStore(SQLBaseStore):
             WHERE event_id = ?
         """
 
-        txn.execute(sql, (
-            event.room_id, event.internal_metadata.stream_ordering,
-            event.depth, event.event_id,
-        ))
+        if events_and_contexts:
+            txn.executemany(sql, (
+                (
+                    event.room_id, event.internal_metadata.stream_ordering,
+                    event.depth, event.event_id,
+                )
+                for event, _ in events_and_contexts
+            ))
 
-        user_ids = self._simple_select_onecol_txn(
-            txn,
-            table="event_push_actions_staging",
-            keyvalues={
-                "event_id": event.event_id,
-            },
-            retcol="user_id",
-        )
-
-        self._simple_delete_txn(
-            txn,
-            table="event_push_actions_staging",
-            keyvalues={
-                "event_id": event.event_id,
-            },
-        )
-
-        for uid in user_ids:
-            txn.call_after(
-                self.get_unread_event_push_actions_by_room_for_user.invalidate_many,
-                (event.room_id, uid,)
+        for event, _ in events_and_contexts:
+            user_ids = self._simple_select_onecol_txn(
+                txn,
+                table="event_push_actions_staging",
+                keyvalues={
+                    "event_id": event.event_id,
+                },
+                retcol="user_id",
             )
 
+            for uid in user_ids:
+                txn.call_after(
+                    self.get_unread_event_push_actions_by_room_for_user.invalidate_many,
+                    (event.room_id, uid,)
+                )
+
+        txn.executemany(
+            "DELETE FROM event_push_actions_staging WHERE event_id = ?",
+            (
+                (event.event_id,)
+                for event, _ in events_and_contexts
+            )
+        )
+
     @cachedInlineCallbacks(num_args=3, tree=True, max_entries=5000)
     def get_unread_event_push_actions_by_room_for_user(
             self, room_id, user_id, last_read_event_id
diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index 73177e0bc2..c8b8abc2e7 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -1162,16 +1162,17 @@ class EventsStore(SQLBaseStore):
             backfilled (bool): True if the events were backfilled
         """
 
+        # Insert all the push actions into the event_push_actions table.
+        self._set_push_actions_for_event_and_users_txn(
+            txn,
+            events_and_contexts=events_and_contexts,
+        )
+
         if not events_and_contexts:
             # nothing to do here
             return
 
         for event, context in events_and_contexts:
-            # Insert all the push actions into the event_push_actions table.
-            self._set_push_actions_for_event_and_users_txn(
-                txn, event,
-            )
-
             if event.type == EventTypes.Redaction and event.redacts is not None:
                 # Remove the entries in the event_push_actions table for the
                 # redacted event.