Starting with the Windchill 10.1 MR010 release there is no need to set the next action (i.e. setNextAction(FormResultAction.REFRESH_OPENER)). Only the OIDs the objects added/updated/removed should be added to the FormResult object.

Example: formResult.addDynamicRefreshInfo new DynamicRefreshInfo(newOid, oldOid, NmCommandBean.DYNAMIC_UPD))

The ability to set a URL or Javascript function on the FormResult is still valid. However, this should only be done when no other options are available. Because multiple clients are potentially invoking these actions the URL javascript returned may not be appropriate or may not reference valid code. Ideally, you want the components to update themselves and not have individual actions update the components on the page. If a URL is set on the FormResult, the afteraction listener will not be called on the component where the action was launched from. However, the objectsaffectedlistener will be called.