long begin = request.getAttributeLong(MailService.A_TOKEN, 0);
String token = request.getAttribute(MailService.A_TOKEN, "0");
    public Element handle(Element request, Map<String, Object> context) throws ServiceException {        ZimbraSoapContext zsc = getZimbraSoapContext(context);        Mailbox mbox = getRequestedMailbox(zsc);        Mailbox.OperationContext octxt = zsc.getOperationContext();        Session session = getSession(context);        long begin = request.getAttributeLong(MailService.A_TOKEN, 0);        Element response = zsc.createElement(MailService.SYNC_RESPONSE);        response.addAttribute(MailService.A_CHANGE_DATE, System.currentTimeMillis() / 1000);                SyncOperation op = new SyncOperation(session, octxt, mbox, zsc, request, response, begin);        op.schedule();                return response;    }