cardholderdeleteaction.java

我在加拿大学习的一个比较复杂的在线银行程序.

package com.ebusiness.ebank.action;

import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.ActionErrors;

import org.apache.log4j.Logger;
import org.apache.log4j.MDC;
import org.apache.struts.Globals;

import com.ebusiness.ebank.form.CardholderForm;

import com.ebusiness.ebank.servicedelegate.CardholderAccessDelegate;
import com.ebusiness.ebank.exception.BusinessException;
import com.ebusiness.ebank.exception.SystemException;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: eBusiness Inc., All right reserved</p>
 * @author unascribed
 * @version 1.0
 */

public class CardholderDeleteAction extends Action
{
    public ActionForward execute(ActionMapping mapping,
                                 ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response) throws Exception
    {
        HttpSession session = request.getSession(false);
        Locale locale = (Locale)session.getAttribute(Globals.LOCALE_KEY);

        Logger log = Logger.getLogger(this.getClass());
        MDC.put("userid", request.getRemoteUser());

        ActionErrors errors =  new ActionErrors();

        CardholderForm cardDetail = (CardholderForm)form;

        String action = cardDetail.getAction();

        // defalut forward page
        String forward = "cancel" ;

        if ("delete".equalsIgnoreCase(action))
        {
            // avoid duplicate submission caused by double click
            if (!(isTokenValid(request)))
                return mapping.findForward("delete");
            else
                saveToken(request) ;

            try
            {
                CardholderAccessDelegate.deleteCardholder(cardDetail.mappingToModel(locale));
                cardDetail.clear();
                forward = "delete" ;
            }
            catch (SystemException e)
            {
                log.error(e.getMessage(),e) ;
                forward = "error" ;
            }
            catch (BusinessException e)
            {
                errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("errors.businessException",e.getMessage(locale)));
                saveErrors(request,errors);
                forward = "failure" ;
            }
        }
        else
            forward = "cancel" ;

        return mapping.findForward(forward);
    }

}