if( resource == null ){
String path = Paths.path("security/usergroup", name, fileConfig.getFileName());
resource = get(path);
}
UserGroupFileWatcher watcher = new UserGroupFileWatcher(resource,service);
service.registerUserGroupLoadedListener(watcher);
watcher.start();
//register the watcher so we can kill it later on disposale
fileWatchers.add(watcher);
}
}