shoppingfacadeejb.java

《J2EE企业级应用开发》一书的配套源代码

package com.j2eeapp.cdstore.cart;

import com.j2eeapp.cdstore.customer.*;
import com.j2eeapp.cdstore.servicelocator.*;
import com.j2eeapp.cdstore.util.*;
import com.j2eeapp.cdstore.storage.*;
import com.j2eeapp.cdstore.vo.*;
import com.j2eeapp.cdstore.order.*;
import java.rmi.RemoteException;
import javax.ejb.*;
import java.util.*;

public class ShoppingFacadeEJB implements SessionBean
{
    /**
     * Attributes declaration
    */
    public SessionContext EJB_Context = null;
    private String userId;
    private ShoppingCart cart;
    private CustomerLocal customer;
    EJBServiceLocator sl;
    
    /**
     * @J2EE_METHOD  --  ShoppingFacadeEJB
     */
    public ShoppingFacadeEJB    ()  throws ServiceLocatorException
    { 
       sl=new EJBServiceLocator();
    }
    
    /**
     * @J2EE_METHOD  --  ejbCreate
     * Called by the container to create a session bean instance. Its parameters typically
     * contain the information the client uses to customize the bean instance for its use.
     * It requires a matching pair in the bean class and its home interface.
     */
    public void ejbCreate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbRemove
     * A container invokes this method before it ends the life of the session object. This
     * happens as a result of a client's invoking a remove operation, or when a container
     * decides to terminate the session object after a timeout. This method is called with
     * no transaction context.
     */
    public void ejbRemove    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbActivate
     * The activate method is called when the instance is activated from its 'passive' state.
     * The instance should acquire any resource that it has released earlier in the ejbPassivate()
     * method. This method is called with no transaction context.
     */
    public void ejbActivate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  ejbPassivate
     * The passivate method is called before the instance enters the 'passive' state. The
     * instance should release any resources that it can re-acquire later in the ejbActivate()
     * method. After the passivate method completes, the instance must be in a state that
     * allows the container to use the Java Serialization protocol to externalize and store
     * away the instance's state. This method is called with no transaction context.
     */
    public void ejbPassivate    ()  
    { 

    }
    
    /**
     * @J2EE_METHOD  --  setSessionContext
     * Set the associated session context. The container calls this method after the instance
     * creation. The enterprise Bean instance should store the reference to the context
     * object in an instance variable. This method is called with no transaction context.
     */
    public void setSessionContext    (SessionContext sc)  
    { 
		this.EJB_Context=sc;
    }
    
    /**
     * @J2EE_METHOD  --  setUserId
     */
    public void setUserId    (String userId)  
    { 
		 this.userId = userId;
    }
    
    /**
     * @J2EE_METHOD  --  getUserId
     */
    public String getUserId    ()  
    { 
		return userId;
 
    }
    
    /**
     * @J2EE_METHOD  --  getShoppingCart
     */
    public ShoppingCart getShoppingCart    ()  
    { 
		 if (cart == null) {
            try {
                EJBServiceLocator sl = new EJBServiceLocator();
                ShoppingCartHome home =(ShoppingCartHome)sl.getRemoteHome(JNDINames.SHOPPING_CART,ShoppingCartHome.class);
                cart = home.create();
            } catch (javax.ejb.CreateException cx) {
                System.out.println("ShoppingClientFacade: failed to create cart: caught " + cx);
            } catch (ServiceLocatorException slx) {   
                System.out.println("ShoppingClientFacade: failed to look up name of cart: caught " + slx);
            }
            catch(RemoteException e)
            {
            	System.out.println(e.getMessage());
            }
        }
        return cart;
  
    }
    
    /**
     * @J2EE_METHOD  --  getCustomer
     */
    public CustomerLocal getCustomer    ()  
    { 
		 if (userId == null) {
                System.out.println("ShoppingClientFacade: failed to look up name of customer: userId is not set" );
            }
            try {
                EJBServiceLocator sl = new EJBServiceLocator();
                CustomerLocalHome home =(CustomerLocalHome)sl.getLocalHome(JNDINames.CUSTOMER);
                customer = home.findByPrimaryKey(userId);
            } catch (ServiceLocatorException slx) {   
                System.out.println("ShoppingClientFacade: failed to look up name of customer: caught " + slx);
            }
            catch(FinderException e)
            {
            	System.out.println("can't find customer"+userId+e.getMessage());
            }
        return customer;
   
    }
    
    /**
     * @J2EE_METHOD  --  createCustomer
     */
    public CustomerLocal createCustomer    ()  
    { 
 		 try {
                EJBServiceLocator sl = new EJBServiceLocator();
                CustomerLocalHome home =(CustomerLocalHome)sl.getLocalHome(JNDINames.CUSTOMER);
                customer = home.create(userId);
                this.userId = userId;
            } catch (javax.ejb.CreateException ce) {
                System.out.println("ShoppingClientFacade: failed to create customer: caught " + ce);
            } catch (ServiceLocatorException slx) {   
                System.out.println("ShoppingClientFacade: failed to look up name of customer: caught " + slx);
            }
        return customer;
 
    }
    
   public Collection getCategory()throws javax.ejb.FinderException,ServiceLocatorException
    {
    	CategoryLocalHome cateHome= (CategoryLocalHome) sl.getLocalHome(JNDINames.CATEGORY);
   	    Collection c=cateHome.findAllCategorys();
   	    Iterator it=c.iterator();
   	    Collection cate=new ArrayList();
   	    while(it.hasNext())
   	    {
   	   		CategoryLocal category=(CategoryLocal)it.next();
   	   		cate.add(new Category(category.getCateId(),category.getName(),category.getDescription()));
   	    }
   	   	return cate;
   	 }
   	 
   	 public Collection getProductByCategory(String category)throws javax.ejb.FinderException,ServiceLocatorException
   	 {
   	 	
   	    ProductLocalHome productHome=(ProductLocalHome)sl.getLocalHome(JNDINames.PRODUCT);
   		Collection co=productHome.findProductByCategory(category);
   		Iterator it=co.iterator();
   		Collection re=new ArrayList();
   		while(it.hasNext())
   		{
   			ProductLocal product=(ProductLocal)it.next();
   			re.add(new ProductDescription(product.getProductId(),product.getName(),product.getDescription(),""));
   			
   		}
   		return re;
   	}
   	
   	public void cancelAllOrder()throws  FinderException,ServiceLocatorException
   	{
   		try
   		{
   			
	   		OrderLocalHome orderHome=(OrderLocalHome)sl.getLocalHome(JNDINames.ORDER);
		   	Collection orders=orderHome.findAllUnPassedAndUnCanceled(getUserId()); 
		   	OrderLocal orderLocal;
		   	Iterator it=orders.iterator();
	   		while(it.hasNext())
	   		{
	   			orderLocal=(OrderLocal)it.next();
	   		    orderLocal.getOrderStatus().setStatus(OrderStatusLocalHome.ORDER_STATUS_CANCELED);
	   		}
	   		
	   	}
	   	catch(Exception e)
	   	{
	   		
	   	}
   }
   
   public void cancelOrder(String orderId)throws  FinderException,ServiceLocatorException
   	{
   		try
   		{
   			
	   		OrderLocalHome orderHome=(OrderLocalHome)sl.getLocalHome(JNDINames.ORDER);
		   	OrderLocal orderLocal=orderHome.findByPrimaryKey(orderId);		   	
		   	orderLocal.getOrderStatus().setStatus(OrderStatusLocalHome.ORDER_STATUS_CANCELED);
	   	}
	   	catch(Exception e)
	   	{
	   		
	   	}
   }
   
   public Collection getAllItems(String orderId)
   {
   	   try
   	   {
   	        OrderLocalHome orderHome=(OrderLocalHome)sl.getLocalHome(JNDINames.ORDER);
		   	OrderLocal orderLocal=orderHome.findByPrimaryKey(orderId);	
		   	return orderLocal.getAllItems();
		}
		catch(Exception e)
		{
			System.out.println(e.getMessage());
			return null;
		}
	}
}