Add a cache for get_push rules for user, fix cache invalidation

synapse/storage/push_rule.py

@@ -23,6 +23,7 @@ logger = logging.getLogger(__name__)
 
 
 class PushRuleStore(SQLBaseStore):
+    @cached()
     @defer.inlineCallbacks
     def get_push_rules_for_user(self, user_name):
         rows = yield self._simple_select_list(
@@ -31,6 +32,7 @@ class PushRuleStore(SQLBaseStore):
                 "user_name": user_name,
             },
             retcols=PushRuleTable.fields,
+            desc="get_push_rules_enabled_for_user",
         )
 
         rows.sort(
@@ -150,6 +152,10 @@ class PushRuleStore(SQLBaseStore):
 
             txn.execute(sql, (user_name, priority_class, new_rule_priority))
 
+        txn.call_after(
+            self.get_push_rules_for_user.invalidate, user_name
+        )
+
         txn.call_after(
             self.get_push_rules_enabled_for_user.invalidate, user_name
         )
@@ -182,6 +188,9 @@ class PushRuleStore(SQLBaseStore):
         new_rule['priority_class'] = priority_class
         new_rule['priority'] = new_prio
 
+        txn.call_after(
+            self.get_push_rules_for_user.invalidate, user_name
+        )
         txn.call_after(
             self.get_push_rules_enabled_for_user.invalidate, user_name
         )
@@ -208,6 +217,8 @@ class PushRuleStore(SQLBaseStore):
             {'user_name': user_name, 'rule_id': rule_id},
             desc="delete_push_rule",
         )
+
+        self.get_push_rules_for_user.invalidate(user_name)
         self.get_push_rules_enabled_for_user.invalidate(user_name)
 
     @defer.inlineCallbacks
@@ -228,7 +239,12 @@ class PushRuleStore(SQLBaseStore):
             {'enabled': 1 if enabled else 0},
             {'id': new_id},
         )
-        self.get_push_rules_enabled_for_user.invalidate(user_name)
+        txn.call_after(
+            self.get_push_rules_for_user.invalidate, user_name
+        )
+        txn.call_after(
+            self.get_push_rules_enabled_for_user.invalidate, user_name
+        )
 
 
 class RuleNotFoundException(Exception):