Add method EventHandlerBase.cleanup()

lib/tfw/components/source_code_event_handler.py

@@ -58,7 +58,7 @@ class SourceCodeEventHandler(EventHandlerBase, SupervisorMixin):
         }
 
         self.monitor = DirectoryMonitor(directory)
-        self.monitor.watch()    # This runs on a separate thread TODO: when to call stop()?
+        self.monitor.watch()    # This runs on a separate thread
 
     def read(self, data):
         try: data['content'] = self.filemanager.file_contents
@@ -89,6 +89,9 @@ class SourceCodeEventHandler(EventHandlerBase, SupervisorMixin):
         self.attach_fileinfo(data)
         return data_json
 
+    def cleanup(self):
+        self.monitor.stop()
+
 
 def map_file_extension_to_language(filename):
     language_map = {

lib/tfw/event_handler_base.py

@@ -23,6 +23,9 @@ class EventHandlerBase:
     def handle_reset(self, data_json):
         return None
 
+    def cleanup(self):
+        pass
+
     def message_other(self, anchor, data):
         message = {
             'anchor': anchor,