4 Replies Latest reply on Apr 28, 2006 9:30 AM by villo

Binding to a bean in a jsp page

anotherray Mar 30, 2006 4:23 PM

I have been following the EJB3 tutorials and from a jsp page I can access an Stateless Session Bean's data when calling the object from a servlet, but when I try and access the bean directly from the jsp I get a 'remote not bound' exception

for instance I can call from a servlet:

protected void processRequest( HttpServletRequest request, HttpServletResponse response )
 throws ServletException, IOException
 {
 String actionName = request.getParameter( ACTION_KEY );
 String destinationPage = ERROR_PAGE;

 // perform action
 if( VIEW_ITEMS_LIST_ACTION.equals( actionName ) )
 {
 ItemsDAO itemDao = new ItemDAO();
 request.setAttribute( "itemList", itemDao.getItemList() );
 destinationPage = "/itemList.jsp";
 }

and then can access the data from the itemList.jsp page, but what I would like to do is manipulate the object directly from the itemList.jsp page as in:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page import="javax.naming.*,
 java.text.*,
 java.lang.*,
 java.util.*,
 com.wsmp.dao.*,
 com.wsmp.dto.*"%>
<%!
 private ItemDAO itemDao = null;
 public void jspInit ()
 {
 try
 {
 InitialContext ctx = new InitialContext();
 itemDao = (ItemDAO) ctx.lookup("wsmp/ItemDAO/remote");
 }
 catch( Exception e ) { e.printStackTrace(); }
 }
%>

<html>
.
.

This lookup fails - what should I do to register the ItemDAO Session Bean for a lookup from a web client? - I know that sounds like a dumb question but I thought that EJB3 obviated the need to register the beans in the web.xml file...

1. Re: Binding to a bean in a jsp page

anotherray Mar 31, 2006 8:18 AM (in response to anotherray)

bump - anybody?
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2. Re: Binding to a bean in a jsp page

ablevine1 Apr 24, 2006 3:43 PM (in response to anotherray)

How did you get the jstl core taglib to work?? When I use the following taglib statementL
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

I get an error saying that there is no taglib that corresponds to the uri:

I also tried using the uri "http://java.sun.com/jstl/core" which didn't work either. I am using jboss-4.0.4.CR2 which has jstl.jar in the deploy/jbossweb-tomcat55.sar/jsf-libs/ directory. Is there something extra that I need to do to get it to find the taglib??
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3. Re: Binding to a bean in a jsp page

bdecoste Apr 25, 2006 2:07 PM (in response to anotherray)

I suspect your lookup is incorrect. The default jndi binding is "ear-name/bean-name/remote". In this case you have the lookup containing thebean interface name (ItemDAO). If Item is the session bean interface and ItemBean is the bean class, the lookup would be:

Item item = (Item)ctx.lookup("wsmp/ItemBean/remote");

The packaging should contain the .war and ejb3 .jar in wsmp.ear. Since you are doing a lookup in the global jndi tree, there is no need for a reference in web.xml.
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4. Re: Binding to a bean in a jsp page

villo Apr 28, 2006 9:30 AM (in response to anotherray)

Have you checked that the jstl implementation is within your classpath?
if you use the jakarta impl. ensure that the standard.jar is there...
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