HttpSession session = request.getSession(false);
HttpSession session = request.getSession(false); session.removeAttribute(SessionConstants.INFO_EVALUATION);
	public ActionForward viewEvaluation(		ActionMapping mapping,		ActionForm form,		HttpServletRequest request,		HttpServletResponse response)		throws FenixActionException {				HttpSession session = request.getSession(false);			//	get executionCourse from session		InfoSite infoSite = (InfoSite) session.getAttribute(SessionConstants.INFO_SITE);				InfoExecutionCourse infoExecutionCourse = infoSite.getInfoExecutionCourse();		//execute action main service		Object[] args = { infoExecutionCourse };		InfoEvaluation infoEvaluation = null;		try {			infoEvaluation =				(InfoEvaluation) ServiceUtils.executeService(					null,					"ReadEvaluation",					args);		} catch (FenixServiceException e) {			throw new FenixActionException(e);		}		//place in request/session everything needed			if (infoEvaluation != null) {			session.setAttribute(SessionConstants.INFO_EVALUATION,infoEvaluation);			return mapping.findForward("viewEvaluation");		}else {				return mapping.findForward("editEvaluation");}	}