itemlistservlet.java

wap application with enterprise java beans.

import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
import javax.rmi.*;
import javax.naming.*;
import java.util.*;


public class ItemListServlet extends HttpServlet
{

	
	ItemHome itemHome;
	
	public void init() throws ServletException
	{
		try
		{
			System.out.println("trying to get initial context");
			Context ic = (InitialContext) getInitialContext();
			System.out.println("Got InitContext");
			Object objRef = ic.lookup("Item");
			System.out.println("Got obj ref");
			itemHome = (ItemHome) PortableRemoteObject.narrow(objRef,ItemHome.class);
			System.out.println("Got Home");
		}catch(Exception e)
		{
			System.out.println("Error in init");
			e.printStackTrace();
		}
	}
	
	public void doGet(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException
	{
		
		try
		{
			HttpSession session = req.getSession(false);
			String clientCode = (String)req.getParameter("client");
			session.setAttribute("ClientId",clientCode);
			Collection items = itemHome.findAll();
			if(items.size() <= 0)
			{
				System.out.println("items size: " + items.size());
				res.sendRedirect(res.encodeURL("/Status.jsp?code=3"));
			}
			Vector itemInfo[] = new Vector[items.size()];
			System.out.println("length of item list: " + items.size());
			Iterator i = items.iterator();
			int cnt=0;
			System.out.println("Beginning search");

			while(i.hasNext())
			{
				
				Item item = (Item) i.next();
				itemInfo[cnt] = new Vector(3);
				itemInfo[cnt].add(item.getId());
				itemInfo[cnt].add(item.getName());
				itemInfo[cnt].add(item.getDescription());
				cnt++;
			
			}
			session.setAttribute("ItemList",itemInfo);
			System.out.println("redirecting to itemlist jsp");
			res.sendRedirect(res.encodeURL("/ItemList.jsp"));
		}catch(Exception e){
			System.out.println("Error while obtaining item list:" + e.getMessage());
			res.sendRedirect(res.encodeURL("/Status.jsp?code=1"));

		}
	}
	
	private Context getInitialContext() throws NamingException
    {
    	Properties h = null;
    	try {
      // Get an InitialContext
      	h = new Properties();
      	h.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
	      h.put(Context.PROVIDER_URL, "t3://localhost:7001");
      	
	      
    	}catch(Exception ne) {
      	System.out.println("Unable to get an initial context");
    	}
		return new InitialContext(h);   
   }

}