addressdetailaction.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.ActionErrors;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.Globals;
import org.apache.log4j.Logger;
import org.apache.log4j.MDC;

import com.ebusiness.ebank.form.AddressForm;
import com.ebusiness.ebank.form.CardholderForm;
import com.ebusiness.ebank.bean.AddressValue;
import com.ebusiness.ebank.bean.CardholderValue;
import com.ebusiness.ebank.exception.SystemException;
import com.ebusiness.ebank.exception.BusinessException;
import com.ebusiness.ebank.servicedelegate.CardholderAccessDelegate;
import com.ebusiness.ebank.util.Constants;

/**
 * <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 AddressDetailAction extends Action {

  public ActionForward execute(ActionMapping mapping,
                                ActionForm form,
                                HttpServletRequest request,
                                HttpServletResponse response) throws Exception   {



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

    HttpSession session = request.getSession(false);
    Locale locale = (Locale)session.getAttribute(Globals.LOCALE_KEY);
    AddressForm addressDetail = (AddressForm)form;
    CardholderForm   cardDetail   = (CardholderForm)session.getAttribute(Constants.CARDHOLDER_FORM);
    String action = addressDetail.getAction();
    addressDetail.setCardholderOID(cardDetail.getObjectID());
    ActionErrors errors =  new ActionErrors();
    // set default flag
    String forward="failure";

    if (("back").equalsIgnoreCase(action))
        forward = "back";
    else if (("delete").equalsIgnoreCase(action))
         forward = "delete";
    else if (("preview").equalsIgnoreCase(action))
         forward = "preview";
    else if (("done").equalsIgnoreCase(action)) //finish entering address data for a new cardholder
    {
        forward = "done" ;
    	// avoid duplicate submission caused by double click
        if (!(isTokenValid(request)))
            return mapping.findForward(forward);

        saveToken(request) ;

        errors = (ActionErrors)addressDetail.validate(mapping,request);

        if ( errors == null || errors.isEmpty())
        {
            if (errors == null ) errors = new ActionErrors() ;
            if (addressDetail.getObjectID() < 1) //new address
            {
               addressDetail.setObjectID(cardDetail.getNextTempAddressOID());
               cardDetail.addAddress(addressDetail);

            }
        }
    }
    else if (("save").equalsIgnoreCase(action))
    {
        AddressValue aValue;
        CardholderValue cValue;
        try
        {
            if (cardDetail.getObjectID() < 1) //new cardholder
            {
                cardDetail.addAddress(addressDetail);
                forward = "save"; //forward back to Cardholder Details page
            }
            else
            {
                if (addressDetail.getObjectID() < 1) //new address
                {
                    aValue = CardholderAccessDelegate.createAddress(
                            addressDetail.mappingToModel(locale));
                    cardDetail.addAddress(AddressForm.mappingFromModel(aValue,
                            locale));
                } else {
                    aValue = CardholderAccessDelegate.updateAddress(
                            addressDetail.mappingToModel(locale));
                    cardDetail.replaceAddress(addressDetail,
                                              AddressForm.
                                              mappingFromModel(aValue, locale));
                }
            }
        }
        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" ;
        }
     } // end "save"

     if (errors!= null && !errors.isEmpty())
     {
            saveErrors(request, errors);
            forward = "failure" ;
     }

     if (("reset").equals(action))
     {
        forward = "reset" ;
        ActionForward reset = new ActionForward();
        reset.setPath(mapping.findForward(forward).getPath());
        reset.setRedirect(true);
        return reset ;
     }

     log.debug("forward is " + forward );
     return mapping.findForward(forward);
  }
}