java如何从EJB计时器更改callerPrincipal？

Question

我的EJB计时器总是与UNAUTHENTICATED用户一起运行。我试图把@RunAs放进去，但没用。我试图用反射更改值，但没有成功，我需要从中调用一个远程EJB，我需要一个有权限的用户

@Resource
private SessionContext context;

@Schedule(second= "*/5", minute = "*", hour = "*", persistent = false)
public void executa(){

    Principal callerPrincipal = context.getCallerPrincipal();
    final Field field = getField(callerPrincipal.getClass(), "name");
    field.setAccessible(true);

    try {
        field.set(callerPrincipal,"MYUSER");
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }

    this.iMyRemoteEjb.doWork()
 }