add current_activity hook for extensions

jupyter_server/extension/handler.py

@@ -28,8 +28,9 @@ class ExtensionHandlerMixin:
     other extensions.
     """
 
-    def initialize(self, name):
+    def initialize(self, name, **kwargs):
         self.name = name
+        super().initialize(**kwargs)
 
     @property
     def extensionapp(self):

jupyter_server/extension/manager.py

@@ -401,6 +401,7 @@ async def stop_all_extensions(self):
         )
 
     def any_activity(self):
+        """Check for any activity currently happening across all extension applications."""
         for name, app in sorted(dict(self.extension_apps).items()):
-            if app.activity:
+            if app.current_activity():
                 return True

jupyter_server/serverapp.py

@@ -2090,11 +2090,6 @@ def shutdown_no_activity(self):
         if self.extension_manager.any_activity:
             return
 
-        if self.terminals_available:
-            term_mgr = self.web_app.settings["terminal_manager"]
-            if term_mgr.terminals:
-                return  # Terminals still running
-
         seconds_since_active = (utcnow() - self.web_app.last_activity()).total_seconds()
         self.log.debug("No activity for %d seconds.", seconds_since_active)
         if seconds_since_active > self.shutdown_no_activity_timeout: