Hi,
I am using Jboss 4.0.3, i have developed one simplee ejb application. it is
successfully deployed. But when i run the application it throws null pointer
exception. Please see the code, the exception is thrown at the line marked in
red.
/*
* SessionTestServlet.java
*
*/
package test.session;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
public class SessionTestServlet extends HttpServlet {
MyTestSessionHome testSessionBean;
public void init(ServletConfig config) throws ServletException{
//Look up home interface
try {
InitialContext ctx = new InitialContext();
Object objref = ctx.lookup("ejb/test/MyTestSessionBean");
testSessionBean = (MyTestSessionHome)PortableRemoteObject.narrow(objref,
MyTestSessionHome.class);
} catch (Exception NamingException) {
NamingException.printStackTrace();
}
}
public void service(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
PrintWriter out;
response.setContentType("text/html");
String title = "EJB Example";
out = response.getWriter();
out.println("");
out.println("");
out.println("Hello World Servlet!");
out.println("");
out.println("");
out.println("<p align=\"center\"><font size=\"4\"
color=\"#000080\">Servlet Calling Session Bean");
try{
MyTestSession beanRemote;
System.out.println("Before create");
beanRemote = testSessionBean.create();
System.out.println("After create");
out.println("<p align=\"center\"> Message from Session Bean is: " +
beanRemote.SayHi() + "");
beanRemote.remove();
}catch(Exception CreateException){
CreateException.printStackTrace();
}
out.println("<p align=\"center\"><a
href=\"javascript:history.back()\">Go to Home");
out.println("");
out.println("");
out.close();
}
public void destroy() {
System.out.println("Destroy");
}
}
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