diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index e30f9c76d4..303a5d5298 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -15,12 +15,13 @@
# limitations under the License.
import logging
from abc import ABCMeta
-from typing import TYPE_CHECKING, Any, Collection, Iterable, Optional, Union
+from typing import TYPE_CHECKING, Any, Collection, Dict, Iterable, Optional, Union
from synapse.storage.database import make_in_list_sql_clause # noqa: F401; noqa: F401
from synapse.storage.database import DatabasePool, LoggingDatabaseConnection
from synapse.types import get_domain_from_id
from synapse.util import json_decoder
+from synapse.util.caches.descriptors import CachedFunction
if TYPE_CHECKING:
from synapse.server import HomeServer
@@ -47,6 +48,8 @@ class SQLBaseStore(metaclass=ABCMeta):
self.database_engine = database.engine
self.db_pool = database
+ self.external_cached_functions: Dict[str, CachedFunction] = {}
+
def process_replication_rows(
self,
stream_name: str,
@@ -95,7 +98,7 @@ class SQLBaseStore(metaclass=ABCMeta):
def _attempt_to_invalidate_cache(
self, cache_name: str, key: Optional[Collection[Any]]
- ) -> None:
+ ) -> bool:
"""Attempts to invalidate the cache of the given name, ignoring if the
cache doesn't exist. Mainly used for invalidating caches on workers,
where they may not have the cache.
@@ -113,9 +116,12 @@ class SQLBaseStore(metaclass=ABCMeta):
try:
cache = getattr(self, cache_name)
except AttributeError:
- # We probably haven't pulled in the cache in this worker,
- # which is fine.
- return
+ # Check if an externally defined module cache has been registered
+ cache = self.external_cached_functions.get(cache_name)
+ if not cache:
+ # We probably haven't pulled in the cache in this worker,
+ # which is fine.
+ return False
if key is None:
cache.invalidate_all()
@@ -125,6 +131,13 @@ class SQLBaseStore(metaclass=ABCMeta):
invalidate_method = getattr(cache, "invalidate_local", cache.invalidate)
invalidate_method(tuple(key))
+ return True
+
+ def register_external_cached_function(
+ self, cache_name: str, func: CachedFunction
+ ) -> None:
+ self.external_cached_functions[cache_name] = func
+
def db_to_json(db_content: Union[memoryview, bytes, bytearray, str]) -> Any:
"""
|
