public ActionForward selectCandidatesForAllGroups(final ActionMapping mapping, final ActionForm actionForm,
final HttpServletRequest request, final HttpServletResponse response) throws IOException {
final OutboundMobilityCandidacyPeriod period = getDomainObject(request, "candidacyPeriodOid");
try {
final String result = period.selectCandidatesForAllGroups();
request.setAttribute("result", result);
} catch (final DomainException ex) {
final String error = ex.getKey();
request.setAttribute("error", error);
}