SERVER-34163 Make refreshing a database entry in the CatalogCache asynchronous

1 files changed, 17 insertions, 0 deletions

diff --git a/src/mongo/s/catalog_cache.h b/src/mongo/s/catalog_cache.h
index 9903f19b3ec..35fecda1081 100644
--- a/src/mongo/s/catalog_cache.h
+++ b/src/mongo/s/catalog_cache.h
@@ -198,11 +198,28 @@ private:
         // unset if the cache entry has never been loaded, or should not be relied on).
         bool needsRefresh{true};
 
+        // Contains a notification to be waited on for the refresh to complete (only available if
+        // needsRefresh is true)
+        std::shared_ptr<Notification<Status>> refreshCompletionNotification;
+
+        // Until SERVER-34061 goes in, after a database refresh, one thread should also load the
+        // sharded collections. In case multiple threads were queued up on the refresh, this bool
+        // ensures only the first loads the collections.
+        bool mustLoadShardedCollections{true};
+
         // Contains the cached info about the database (only available if needsRefresh is false)
         boost::optional<DatabaseType> dbt;
     };
 
     /**
+     * Non-blocking call which schedules an asynchronous refresh for the specified database. The
+     * database entry must be in the 'needsRefresh' state.
+     */
+    void _scheduleDatabaseRefresh(WithLock,
+                                  const StringData dbName,
+                                  std::shared_ptr<DatabaseInfoEntry> dbEntry);
+
+    /**
      * Non-blocking call which schedules an asynchronous refresh for the specified namespace. The
      * namespace must be in the 'needRefresh' state.
      */