bt2: make Graph add listener methods return None

The methods add_ports_connected_listener and add_port_added_listener of
bt2.Graph currently return a _ListenerHandle object.  This is not useful
today, since it's not possible to remove those listeners (unlike trace
class and trace destruction listeners).

Make them not return a handle for now.  It will be possible to make them
return a handle again if/when we add the possibility to remove those
listeners.

Change-Id: I5ea1c9d8793232c2f7077b5c2b82797438066d13
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/2424
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>

diff --git a/src/bindings/python/bt2/bt2/graph.py b/src/bindings/python/bt2/bt2/graph.py
index a36c85d1b7176cb37626aa1976775a40ec8454b8..79be1ca80905a94c8aab0de01044c96b41bf287f 100644 (file)
--- a/src/bindings/python/bt2/bt2/graph.py
+++ b/src/bindings/python/bt2/bt2/graph.py
@@ -166,8 +166,6 @@ class Graph(object._SharedObject):
         if listener_ids is None:
             raise bt2._Error('cannot add listener to graph object')
 
-        return utils._ListenerHandle(listener_ids, self)
-
     def add_ports_connected_listener(self, listener):
         if not callable(listener):
             raise TypeError("'listener' parameter is not callable")
@@ -181,8 +179,6 @@ class Graph(object._SharedObject):
         if listener_ids is None:
             raise bt2._Error('cannot add listener to graph object')
 
-        return utils._ListenerHandle(listener_ids, self)
-
     def run_once(self):
         status = native_bt.graph_run_once(self._ptr)
         utils._handle_func_status(status, 'graph object could not run once')