carthandler.java

使用EJB实现的网上商城

package com.jdon.estore.web.cart;

import com.jdon.strutsutil.ModelHandler;
import com.jdon.strutsutil.ModelForm;
import javax.servlet.http.HttpServletRequest;
import com.jdon.controller.model.Model;
import com.jdon.controller.events.EventModel;

import com.jdon.bussinessproxy.ServiceServerFactory;
import com.jdon.bussinessproxy.EJBDefinition;

import com.jdon.controller.model.Model;
import com.jdon.controller.events.*;

import com.jdon.estore.model.CartItem;
import com.jdon.estore.model.ShoppingCart;

import com.jdon.estore.cart.ShoppingCartLocal;
import com.jdon.estore.FrameworkServices;

import java.util.Collection;
import com.jdon.util.Debug;

public class CartHandler implements ModelHandler {
    private final static String module = CartHandler.class.getName();
  private final static ServiceServerFactory sf = ServiceServerFactory.
      getInstance();

  public ModelForm initForm(HttpServletRequest request) throws java.lang.
      Exception {
    return null;
  }

  public Model findModelByKey(String key, HttpServletRequest request) throws
      java.lang.Exception {
    return null;

  }

  public void serviceAction(EventModel em, HttpServletRequest request) throws
      java.lang.Exception {

    ShoppingCartLocal shoppingCartLocal = (ShoppingCartLocal) sf.getService(
        FrameworkServices.ShoppingCartEJB, request);

    try {
      switch (em.getActionType()) {
        case Event.ADD:
          shoppingCartLocal.addCartItem(em);
          break;

        case Event.REMOVE:
          shoppingCartLocal.deleteCartItem(em);
          break;
      }
    } catch (Exception ex) {
      throw new Exception("System operation Error:" + ex);
    }
  }



}