}
@Override
public void handle(HttpServletRequest request, HttpServletResponse response, HandlerChain chain) throws Exception {
String severityParameter = getRequiredParameter(request, SEVERITY_PARAMETER_NAME);
SystemNotificationSeverity severity = SystemNotificationSeverity.valueOf(severityParameter);
String title = getRequiredParameter(request, TITLE_PARAMETER_NAME);
String message = getRequiredParameter(request, MESSAGE_PARAMETER_NAME);
String startDateParameter = getRequiredParameter(request, START_DATE_PARAMETER_NAME);
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
Date startDate = sdf.parse(startDateParameter);