Raise exception if DefaultController cannot find a controller

2014-11-05 18:43:58 -08:00
parent f51eddef6d
commit ccd3276dcf
1 changed files with 5 additions and 1 deletions
@@ -1436,4 +1436,8 @@ def findController( controllers=DefaultControllers ):

 def DefaultController( name, controllers=DefaultControllers, **kwargs ):
    "Find a controller that is available and instantiate it"
-    return findController( controllers )( name, **kwargs )
+    controller = findController( controllers )
+    if not controller:
+        raise Exception( 'Could not find a default OpenFlow controller' )
+    return controller( name, **kwargs )
+