public  void do404(HttpRequest request,
    HttpResponse response) 
{
		response.reset(404, "Object not found.");
		java.io.PrintWriter body = response.getPrintWriter();
		body.println("< !DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\" >");
		body.println("< HTML >< HEAD >");
		body.println("< TITLE >404 Not Found< /TITLE >");
		body.println("< /HEAD >< BODY >");
		body.println("< H1 >Not Found< /H1 >");
		body.println(
			"The requested URL < font color=\"red\" >"
				+ request.getURI().getFile()
				+ "< /font > was not found on this server.< P >");
		body.println("< HR >");
		body.println("< ADDRESS >" + response.getServerName() + "< /ADDRESS >");
		body.println("< /BODY >< /HTML >");
}

Creates a "Page not found" error screen

 public  void do500(HttpRequest request,
    HttpResponse response,
    String message) 
{
		response.reset(500, "Internal Server Error.");
		java.io.PrintWriter body = response.getPrintWriter();
		body.println("< html >");
		body.println("< body >");
		body.println("< h3 >Internal Server Error< /h3 >");
		body.println("< br >< br >");
		if (message != null) {
			StringTokenizer msg = new StringTokenizer(message, "\n\r");
			while (msg.hasMoreTokens()) {
				body.print(msg.nextToken());
				body.println("< br >");
			}
		}
		body.println("< /body >");
		body.println("< /html >");
}

Creates and "Internal Server Error" page

 public  void ejbActivate() throws EJBException, RemoteException 
{

}

called on a stateful sessionbean after the bean is deserialized from storage and put back into use.

 public  void ejbCreate() 
{

}

Creates a new instance

 public  void ejbPassivate() throws EJBException, RemoteException 
{

}

called on a stateful sessionbean before the bean is removed from memory and serialized to a temporary store. This method is never called on a stateless sessionbean

 public  void ejbRemove() throws EJBException, RemoteException 
{

}

called by the ejb container when this bean is about to be garbage collected

 public  void onMessage(HttpRequest request,
    HttpResponse response) throws IOException 
{
        InputStream in = null;  
        OutputStream out = null;
		// Internationalize this
		try {
			String file = request.getURI().getFile();
			String ext = (file.indexOf('.') == -1) ? null : file.substring(file.indexOf('.'));
			if (ext != null) {
				//resolve the content type
				if (ext.equalsIgnoreCase(".gif")) {
					response.setContentType("image/gif");
				} else if (ext.equalsIgnoreCase(".jpeg") || ext.equalsIgnoreCase(".jpg")) {
					response.setContentType("image/jpeg");
				} else if (ext.equalsIgnoreCase(".png")) {
					response.setContentType("image/png");
				} else if (ext.equalsIgnoreCase(".css")) {
					response.setContentType("text/css");
				} else if (ext.equalsIgnoreCase(".js")) {
					response.setContentType("text/javascript");
				} else if (ext.equalsIgnoreCase(".txt")) {
					response.setContentType("text/plain");
				} else if (ext.equalsIgnoreCase(".java")) {
					response.setContentType("text/plain");
				} else if (ext.equalsIgnoreCase(".xml")) {
					response.setContentType("text/plain");
				} else if (ext.equalsIgnoreCase(".zip")) {
					response.setContentType("application/zip");
				}
			}
			URLConnection resource = findResource(request.getURI().getFile());  
            HttpResponseImpl res = (HttpResponseImpl)response;
            res.setContent(resource);
        } catch (java.io.FileNotFoundException e) {
			do404(request, response);
		} catch (java.io.IOException e) {
			do500(request, response, e.getMessage());
		} finally {
            if (in != null) in.close();
        }
}

the main processing part of the this bean

 public  void setSessionContext(SessionContext sessionContext) throws EJBException, RemoteException 
{
		this.context = sessionContext;
}

sets the session context for this bean