Trans.exec(new Molecule(){

       @Override
       public void run() {
         // TODO Auto-generated method stub
         dao.fetch(order.class,Cnd.where("account","=",account));
         try {
          throw new Exception();
         } catch (Exception e) {
          // TODO Auto-generated catch block
          throw new Exception();
         }
       }

    }
         );

    return null;
}