ServletException - VelocityServlet is not a servlet
Hi all,
We have successfully deployed some servlets using JBoss 4.0.1. We are now trying to use the Velocity template engine (which we have used running just tomcat and apache). When accessing the servlet all we get is the exception below, saying that the class is not a servlet.
javax.servlet.ServletException: Class com.transactive.online.submission.LoanSubmitServlet is not a Servlet org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:66) org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:150) org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:54) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) java.lang.Thread.run(Thread.java:536) root cause java.lang.ClassCastException com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:293) javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:134) com.transactive.online.submission.LoanSubmitServlet.<init>(LoanSubmitServlet.java:35) sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) java.lang.reflect.Constructor.newInstance(Constructor.java:274) java.lang.Class.newInstance0(Class.java:306) java.lang.Class.newInstance(Class.java:259) org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:66) org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:150) org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:54) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) java.lang.Thread.run(Thread.java:536)
Here is the code for the servlet:
package com.transactive.online.submission;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.velocity.Template;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.context.Context;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.servlet.VelocityServlet;
public class LoanSubmitServlet extends /*HttpServlet*/ VelocityServlet
{
/*public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
PrintWriter out = response.getWriter();
out.print("<HTML><H1>TEST</H1></HTML>");
out.flush();
return;
}*/
LoanSubmit loanSubmit = null;
public LoanSubmitServlet() throws NamingException
{
javax.naming.Context ctx = new InitialContext();
LoanSubmitHome home = (LoanSubmitHome) PortableRemoteObject.narrow(ctx.lookup("LoanSubmit"), LoanSubmit.class);
try
{
loanSubmit = home.create();
}
catch(Exception e) {}
}
protected Properties loadConfiguration(ServletConfig config) throws IOException, FileNotFoundException
{
Properties p = new Properties();
String path = config.getServletContext().getRealPath("/vm");
if(path == null)
{
System.out.println(" SampleServlet.loadConfiguration() : unable to get "
+ "the current webapp root. Using '/'. Please fix.");
path = "/";
}
p.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, path);
p.setProperty("runtime.log", path + "velocity.log");
return p;
}
public Template handleRequest(HttpServletRequest request, HttpServletResponse response, Context ctx)
{
Template outty = null;
try
{
outty = getTemplate("login.vm");
}
catch(ParseErrorException pee)
{
System.out.println("parse error for template " + pee);
}
catch(ResourceNotFoundException rnfe)
{
System.out.println("template not found " + rnfe);
}
catch(Exception e)
{
System.out.println("Error " + e);
}
return outty;
}
}
Changing it to a HttpServlet and implementing the doGet method works as expected, its just when we extend VelocityServlet that it throws the exception.
Any help on this matter would be greatly appreciated.
Cheers,
Ryan Thomas
TransActive Systems