for (Enumeration en = listeners.elements(); en.hasMoreElements();) {
ServiceReference sr = (ServiceReference) en.nextElement();
UserAdminListener ual = (UserAdminListener) bc.getService(sr);
if (ual != null) {
try {
ual.roleChanged(event);
} catch (Throwable t) {
log.error("[UserAdmin] Error while sending roleChanged event to"+sr,
t);
}
}