public void updateDailyAttendance(ActionRequest areq, ActionResponse aRes) throws Exception {
        int totalEmployees = EmployeeLocalServiceUtil.getEmployeesCount();
        String attendanceValue = getAttendanceValue(areq);
        for (int i = 0; i < totalEmployees; i++) {
            // use attendanceValue to update employee entry
        }
    }

    private String getAttendanceValue(ActionRequest areq) {
        Enumeration parameters = areq.getParameterNames();
        while (parameters.hasMoreElements()) {
            String parameterName = parameters.nextElement().toString();
            if (parameterName.startsWith("updateattendance")) {
                return areq.getParameter(parameterName);
            }
        }
        throw new IllegalStateException("Parameter updateattendance is not found");
    }