Cache tags and account data

1 files changed, 19 insertions, 1 deletions

diff --git a/synapse/storage/account_data.py b/synapse/storage/account_data.py
index 9c6597e012..95294c3f6c 100644
--- a/synapse/storage/account_data.py
+++ b/synapse/storage/account_data.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 
 from ._base import SQLBaseStore
+from synapse.util.caches.stream_change_cache import StreamChangeCache
 from twisted.internet import defer
 
 import ujson as json
@@ -23,6 +24,13 @@ logger = logging.getLogger(__name__)
 
 
 class AccountDataStore(SQLBaseStore):
+    def __init__(self, hs):
+        super(AccountDataStore, self).__init__(hs)
+
+        self._account_data_stream_cache = StreamChangeCache(
+            "AccountDataChangeCache", self._account_data_id_gen.get_max_token(None),
+            max_size=1000,
+        )
 
     def get_account_data_for_user(self, user_id):
         """Get all the client account_data for a user.
@@ -83,7 +91,7 @@ class AccountDataStore(SQLBaseStore):
             "get_account_data_for_room", get_account_data_for_room_txn
         )
 
-    def get_updated_account_data_for_user(self, user_id, stream_id):
+    def get_updated_account_data_for_user(self, user_id, stream_id, room_ids=None):
         """Get all the client account_data for a that's changed.
 
         Args:
@@ -120,6 +128,12 @@ class AccountDataStore(SQLBaseStore):
 
             return (global_account_data, account_data_by_room)
 
+        changed = self._account_data_stream_cache.get_entity_has_changed(
+            user_id, int(stream_id)
+        )
+        if not changed:
+            defer.returnValue(({}, {}))
+
         return self.runInteraction(
             "get_updated_account_data_for_user", get_updated_account_data_for_user_txn
         )
@@ -186,6 +200,10 @@ class AccountDataStore(SQLBaseStore):
                     "content": content_json,
                 }
             )
+            txn.call_after(
+                self._account_data_stream_cache.entity_has_changed,
+                user_id, next_id,
+            )
             self._update_max_stream_id(txn, next_id)
 
         with (yield self._account_data_id_gen.get_next(self)) as next_id: