cardholderaccessdelegate.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.servicedelegate;

/**
 * <p>Title: </p>
 * <p>Description:  Delegate is a bridge class interacting between front-tier and middle tier.
 *                  With this class, the back-end business lodic is isolated from
 *                  front-end. Front-end developers can focus on the presentation layer.
 *
 *                  Since the Delegate can be used either within eBank application
 *                  or by other applications, please do not use struts and Log service
 *                  within the delegate classes.
 *                  </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: eBusiness Inc., All right reserved</p>
 * @author
 * @version 1.0
 */

import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.CreateException;

import com.ebusiness.ebank.bean.ClientCardValue;
import com.ebusiness.ebank.bean.CardholderValue;
import com.ebusiness.ebank.bean.AddressValue;
import com.ebusiness.ebank.bean.ValueList;
import com.ebusiness.ebank.ejb.sessionbean.CardholderAccessLocalHome;
import com.ebusiness.ebank.ejb.sessionbean.CardholderAccessLocal;
import com.ebusiness.ebank.ejb.sessionbean.CardholderAccessHome;
import com.ebusiness.ebank.ejb.sessionbean.CardholderAccess;
import com.ebusiness.ebank.exception.SystemException;
import com.ebusiness.ebank.exception.BusinessException;
import com.ebusiness.ebank.exception.ErrorMessages;
import com.ebusiness.ebank.util.Constants;


public class CardholderAccessDelegate
{
    private static CardholderAccessHome home;
    private static CardholderAccessLocalHome localHome;

    private static boolean isLocal; //Indicate if the Delegate can use local call to ejb tier

    //Instantiate it and initialize CardholderAccess local Home or CardholderAccess remote Home object
    static
    {
        try
        {
            localHome = (CardholderAccessLocalHome)ServiceLocator.getInstance().getLocalHome(Constants.CARDHOLDER_ACCESS_LOCALHOME);
        }
        catch (ServiceLocatorException sle){}
        if (localHome != null)
            isLocal = true; //can use local call
        else //must use remote call
        {
            try
            {
                home = (CardholderAccessHome)ServiceLocator.getInstance().getRemoteHome(Constants.CARDHOLDER_ACCESS_HOME, CardholderAccessHome.class);
            }
            catch (ServiceLocatorException sle){}
        }
    }

    //The following are the delegated business methods. It has an one-to-one
    //relationship with CardholderAccess Session Bean

    /**
    * @Description:    Insert a new cardhoder record and its associated addresses records
    *                  to eBank database. This method allows anyone ba able to register online
    * @param:          CardholderValue
    * @return:
    */
    public static void register(CardholderValue value) throws SystemException,
           BusinessException
    {
        try
        {
            if(isLocal)
            {
                CardholderAccessLocal cardholderAccessLocal = localHome.create();
                cardholderAccessLocal.register(value);
            }
            else
            {
                CardholderAccess cardholderAccess = home.create();
                cardholderAccess.register(value);
            }
        }
        catch(CreateException ce)
        {
            throw new SystemException(ce);
        }
        catch(EJBException ee)
        {
           throw new SystemException(ee);
        }
        catch(RemoteException re)
        {
           throw new SystemException(re);
        }
    }

    /**
    * @Description:    Change password for the cardholder's debit card
    * @return:
    */
    public static ClientCardValue changePW(ClientCardValue value) throws SystemException, BusinessException
    {
        ClientCardValue newValue;
        try
         {
             if(isLocal)
             {
                 CardholderAccessLocal cardholderAccessLocal = localHome.create();
                 newValue = cardholderAccessLocal.changePW(value);
             }
             else
             {
                 CardholderAccess cardholderAccess = home.create();
                 newValue = cardholderAccess.changePW(value);
             }
         }
         catch(CreateException ce)
         {
             throw new SystemException(ce);
         }
         catch(EJBException ee)
         {
            throw new SystemException(ee);
         }
         catch(RemoteException re)
         {
            throw new SystemException(re);
         }
         return newValue;
    }

    /**
   * @Description:    Reset password for the cardholder's web login
   * @return:
   */
   public static ClientCardValue resetWebPW(ClientCardValue value) throws SystemException, BusinessException
   {
        ClientCardValue newValue;
        try
           {
               if(isLocal)
               {
                   CardholderAccessLocal cardholderAccessLocal = localHome.create();
                   newValue = cardholderAccessLocal.resetWebPW(value);
               }
               else
               {
                   CardholderAccess cardholderAccess = home.create();
                   newValue = cardholderAccess.resetWebPW(value);
               }
           }
           catch(CreateException ce)
           {
               throw new SystemException(ce);
           }

           catch(EJBException ee)
           {
              throw new SystemException(ee);
           }
           catch(RemoteException re)
           {
              throw new SystemException(re);
           }

        return newValue;
    }

    /**
     * @Description:    View cardholder data
     * @return:         CardholderValue
     */
     public static ClientCardValue viewClientCardByCardholderOID(long oid) throws SystemException, BusinessException
     {
         ClientCardValue newValue;
         try
          {
              if(isLocal)
              {
                  CardholderAccessLocal cardholderAccessLocal = localHome.create();
                  newValue = cardholderAccessLocal.viewClientCardByCardholderOID(oid);
              }
              else
              {
                  CardholderAccess cardholderAccess = home.create();
                  newValue = cardholderAccess.viewClientCardByCardholderOID(oid);
              }
          }
          catch(CreateException ce)
          {
              throw new SystemException(ce);
          }
          catch(EJBException ee)
          {
             throw new SystemException(ee);
          }
          catch(RemoteException re)
          {
             throw new SystemException(re);
          }
          return newValue;
     }

     /**
         * @Description:    Update cardholder data
         * @param:          CardholderValue
         * @return:         CardholderValue
         */
       public static ClientCardValue updateClientCard(ClientCardValue value) throws SystemException, BusinessException
       {
           ClientCardValue newValue;
           try
           {
               if(isLocal)
               {
                   CardholderAccessLocal cardholderAccessLocal = localHome.create();
                   newValue = cardholderAccessLocal.updateClientCard(value);
               }
               else
               {
                   CardholderAccess cardholderAccess = home.create();
                   newValue = cardholderAccess.updateClientCard(value);
               }
           }
           catch(CreateException ce)
           {
               throw new SystemException(ce);
           }
           catch(EJBException ee)
           {
              throw new SystemException(ee);
           }
           catch(RemoteException re)
           {
              throw new SystemException(re);
           }

           return newValue;
       }

       /**
          * @Description:    Insert a new record for cardholder table
          * @param:          CardholderValue
          * @return:         CardholderValue
          */
       public static ClientCardValue createClientCard(ClientCardValue value) throws SystemException, BusinessException
       {
           ClientCardValue newValue;
           try
           {
               if(isLocal)
               {
                   CardholderAccessLocal cardholderAccessLocal = localHome.create();
                   newValue = cardholderAccessLocal.createClientCard(value);
               }
               else
               {
                   CardholderAccess cardholderAccess = home.create();
                   newValue = cardholderAccess.createClientCard(value);
               }
           }
           catch(CreateException ce)
           {
               throw new SystemException(ce);
           }
           catch(EJBException ee)
           {
              throw new SystemException(ee);
           }
           catch(RemoteException re)
           {
              throw new SystemException(re);
           }

           return newValue;
       }


    /**
     * @Description:    View cardholder data
     * @return:         CardholderValue
     */
     public static CardholderValue viewCardholderByOID(long oid) throws SystemException, BusinessException
     {
         CardholderValue newValue;
         try
          {
              if(isLocal)
              {
                  CardholderAccessLocal cardholderAccessLocal = localHome.create();
                  newValue = cardholderAccessLocal.viewCardholderByOID(oid);
              }
              else
              {
                  CardholderAccess cardholderAccess = home.create();
                  newValue = cardholderAccess.viewCardholderByOID(oid);
              }
          }
          catch(CreateException ce)
          {
              throw new SystemException(ce);
          }
          catch(EJBException ee)
          {
             throw new SystemException(ee);
          }
          catch(RemoteException re)
          {
             throw new SystemException(re);
          }
          return newValue;
     }


    /**
    * @Description:    View cardholder data
    * @return:         CardholderValue
    */
    public static CardholderValue viewCardholder(ClientCardValue value) throws SystemException, BusinessException
    {
        CardholderValue newValue;
        try
         {
             if(isLocal)
             {
                 CardholderAccessLocal cardholderAccessLocal = localHome.create();
                 newValue = cardholderAccessLocal.viewCardholder(value);
             }
             else
             {
                 CardholderAccess cardholderAccess = home.create();
                 newValue = cardholderAccess.viewCardholder(value);
             }
         }
         catch(CreateException ce)
         {