[jboss-user] [Beginners Corner] - EJB 3 TrailBlazer Demo Class Cast
pKraemer
do-not-reply at jboss.com
Tue Feb 6 08:29:34 EST 2007
Well I know that there are several Threads about the ClassCast Problem, but nothing helped me realy - except looking that I did not have these errors.
So, I use JBoss 4.04 and started with the TrailBlazer Demo about StatelessSessionBeans.
I can start the JSP but I got a ClassCastException during it.
I have deployed it to TrailBalzerApplication.ear which contains:
| TrailBlazerApplication.ear
| application.xml
| jboss-app.xml
| TrailBlazerEJB.jar
| TrailBlazerWeb.war
|
The application.xml:
| <application xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd">
| <display-name>TrailBlazerApplication</display-name>
|
| <module id="myeclipse.1170763402122">
| <ejb>TrailBlazerEJB.jar</ejb>
| </module>
|
| <module id="myeclipse.1170763401891">
| <web>
| <web-uri>TrailBlazerWeb.war</web-uri>
| <context-root>TrailBlazerWeb</context-root>
| </web>
| </module>
| </application>
|
The jboss-app.xml
| <?xml version="1.0" encoding="UTF-8"?>
| <jboss-app>
| <loader-repository>
| trailblazerOne:app=ejb3
| </loader-repository>
| </jboss-app>
|
The SessionBean
| package trail.slsb;
|
| import org.jboss.annotation.ejb.LocalBinding;
|
| import javax.ejb.*;
|
| @Stateless
| @LocalBinding (jndiBinding="EJB3TrailBlazer/slsb/Calculator")
| public class StatelessCalculator implements Calculator {
|
| public double calculate (int start, int end, double growthrate, double saving) {
| double tmp = Math.pow(1. + growthrate / 12., 12. * (end - start) + 1);
| return saving * 12. * (tmp - 1) / growthrate;
| }
|
| }
|
Part of the jsp:
| <%@ page import="trail.slsb.*, javax.naming.*, java.text.*"%>
|
| <%!
| private Calculator cal = null;
| public void jspInit () {
| try {
| InitialContext ctx = new InitialContext();
| cal = (Calculator) ctx.lookup(
| "EJB3Trail/StatelessCalculator/local");
| } catch (Exception e) {
| e.printStackTrace ();
| }
| }
| %>
|
There are no errors during deployment
Can anybody please help me?
Thanks
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