MaintenanceEventDao maintenanceEventDao = new MaintenanceEventDao();
if (StringUtils.isBlank(xid))
response.addContextualMessage("xid", "validate.required");
else if (!maintenanceEventDao.isXidUnique(xid, id))
response.addContextualMessage("xid", "validate.xidUsed");
e.validate(response);
// Save the maintenance event
if (!response.getHasMessages()) {