Hi everybody!
I'm new at JBoss so I'm created a simply web application to begin, but I've
encountered a strange Exception:
javax.servlet.ServletException: Lookup of java:/comp/env/ failed --
java.lang.ClassCastException
saluti.web.HolaServlet.init(HolaServlet.java:49)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
java.lang.Thread.run(Unknown Source)
My application asks for a sentence and display it on the screen with some
changes. Here is the code.
HOLABEAN.JAVA:
package saluti.ejb;
import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import javax.ejb.CreateException;
/**
* @ejb.bean name="Hola"
* display-name="Name for Hola"
* description="Description for Hola"
* jndi-name="ejb/Hola"
* type="Stateless"
* view-type="remote"
*/
public class HolaBean implements SessionBean {
public HolaBean() {
super();
// TODO Auto-generated constructor stub
}
public void setSessionContext(SessionContext ctx)
throws EJBException,
RemoteException {
// TODO Auto-generated method stub
}
public void ejbRemove() throws EJBException, RemoteException {
// TODO Auto-generated method stub
}
public void ejbActivate() throws EJBException, RemoteException {
// TODO Auto-generated method stub
}
public void ejbPassivate() throws EJBException, RemoteException {
// TODO Auto-generated method stub
}
/**
* Default create method
*
* @throws CreateException
* @ejb.create-method
*/
public void ejbCreate() throws CreateException {
// TODO Auto-generated method stub
}
/**
* Business method
* @ejb.interface-method view-type = "remote"
*/
public String passer(String fraseInit) {
fraseInit=fraseInit+" + 'Never give up!!'";
return fraseInit;
}
}
HOLASERVLET.JAVA:
package saluti.web;
import javax.servlet.http.HttpServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletConfig;
import java.io.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import saluti.interfaces.*;
import javax.rmi.*;
import java.util.*;
import javax.naming.*;
/**
*
* @web.servlet name="Hola"
* display-name="Hola Servlet"
* description="It's change the sentence"
* @web.servlet-mapping url-pattern="/Hola"
*
* @web.ejb-ref
* name="ejb/Hola"
* type="Session"
* home="saluti.interfaces.HolaHome"
* remote="saluti.interfaces.Hola"
* description="Reference to the Hola EJB"
*
* @jboss.ejb-ref-jndi
* ref-name="ejb/Hola"
* ndi-name="ejb/Hola"
*
*/
public class HolaServlet extends HttpServlet {
private HolaHome home;
public HolaServlet() {
super();
// TODO Auto-generated constructor stub
}
public void init(ServletConfig config) throws ServletException {
try {
Context context = new InitialContext();
Object ref = context.lookup("java:/comp/env/ejb/Hola");
home = (HolaHome) PortableRemoteObject.narrow(ref,
HolaHome.class);
} catch (Exception e) {
throw new ServletException("Lookup of java:/comp/env/
failed -- "+e);
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException,
IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("");
out.println("E divenne...");
out.println("");
out.println("");
out.println("<h1>");
out.println("Magggggia");
out.println("</h1>");
try {
Hola bean = home.create();
String value = request.getParameter("inizio");
String newValue = null;
if (value!=null)
newValue = bean.passer(value);
bean.remove();
out.println("");
out.print("Ed ecco il risultato: ");
out.println(newValue);
out.println("");
} catch (Exception e) {
out.println(e.getMessage());
e.printStackTrace(out);
} finally {
out.println("");
out.close();
}
}//doPost
}//HolaServlet
INDEX.HTML:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
Inizi di Web Service
QUESTO E' L'INDEX DEL MIO
PICCOLO WEB SERVICE....DA QUI...COMINCIA TUTTO........
Inserisci la frase
Thanks in advance for everything!!
Luke
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