private TestEJBBeanLocal testEjb;
@Override
public WorkAck doWork(Work work) {
String cmd = work.getCommand();
ExchangeSecurity es = exchange.getSecurity();
String msg1 = String.format(MSG_1, cmd, es.getCallerPrincipal(), es.isCallerInRole("friend"), es.isCallerInRole("enemy"));
LOGGER.info(msg1);
// BackEndService invocation
String back = backEndService.process(cmd);
String msg2 = String.format(MSG_2, back);
LOGGER.info(msg2);