useful static method

1. set value object in session
RequestAttributes attributes = RequestContextHolder.currentRequestAttributes();
attributes.setAttribute("key", value,
                RequestAttributes.SCOPE_SESSION);


2.get object from session
Object mutex = RequestContextHolder.currentRequestAttributes().getSessionMutex();
        RequestAttributes attributes = RequestContextHolder.currentRequestAttributes();
        Object value = null;
        synchronized (mutex) {
            value = attributes.getAttribute("key",
                    RequestAttributes.SCOPE_SESSION);
        }