TR: [opencms-dev] Help ! Resource loader error ...
M Butcher
mbutcher at grcomputing.net
Fri Jul 18 19:27:01 CEST 2003
Can you try adding a static method to the class, and calling that? That
might narrow down whether the problem is in the class loader or some
nuance in the class itself.
So... add a method to Constants that looks like this:
public static String testMe() {
return "Test";
}
And call it (without a constructor) from the JSP:
<%
out.println(Constants.testMe());
%>
If that works, then at least we know the classloader is working. If not,
maybe another test would be a "manual" classload, where the JSP might
look like this:
<%
try {
Class constantsClass = Class.forName("com.europcar.intranet.Constants");
Constants constants = (Constants)constantsClass.newInstance();
} catch (Throwable t) {
out.println(t.toString());
}
%>
If that fails, then your know that the class isn't visible (or useable)
to the classloader. It may also give you some useful information if it
fails.
Matt
On Fri, 2003-07-18 at 01:45, Apostoly Guillaume wrote:
> Yes, here are my source code.
> What is strange, is that the try catch doesn't catch anything, i think the
> jsp doesn't even compile in fact, for an unknown reason.
>
> The JSP :
> <%@ page session="false" import="com.europcar.intranet.Constants" %>
> <%
> try
> {
> out.println("toto-titi");
> com.europcar.intranet.Constants cts = new com.europcar.intranet.Constants();
> out.println("toto-titi");
> }
> catch (Exception e)
> {
> out.println(e);
> }
> %>
>
> The class : in
> /modules/com.europcar.intranet/classes/com/europcar/intranet/Constants.java
> (i've got the equivalent in .class in the same directory, the class name has
> no influence (i tried also IntranetConstants by example))
>
> /*
> * Constants.java
> *
> * Created on 8 juillet 2003, 10:32
> */
>
> package com.europcar.intranet;
>
> /**
> *
> * @author apostolyg
> */
> public class Constants
> {
>
> /** Creates a new instance of Constants */
> public Constants()
> {
> }
>
> }
>
> If i give new tries, i'll post them.
> Thanks a lot for your help Matt.
>
> Regards,
>
> Guillaume.
>
> > -----Message d'origine-----
> > De: M Butcher [mailto:mbutcher at grcomputing.net]
> > Date: jeudi 17 juillet 2003 19:31
> > À: opencms-dev at opencms.org
> > Objet: RE: TR: [opencms-dev] Help ! Resource loader error ...
> >
> >
> > Is it possible for you to post code samples?
> >
> > One thing I encountered yesterday (and still haven't quite
> > figured out)
> > is that a particular variable name (e.g. the line 'int
> > thisDate', though
> > that's not the exact name -- I can't remember what the real name was)
> > was causing exactly the same problem as what you have
> > described. I would
> > have expected some error about redeclaring an existing
> > variable, like I
> > normally get when I do that, but that was not the case.
> > Anyway, changing
> > the name of the variable fixed the problem.
> >
> > A few more questions... though you're probably sick of my asking them:
> >
> > - Do you know the exact line of code that is causing the exception?
> > - Can you wrap that code in a try/catch and catch a more informative
> > exception? (Do a catch(Exception e) to make sure you get stuff like
> > NullPointerException)
> >
> > Sorry I can't be of more help... at least I'm not telling you
> > to restart
> > tomcat anymore. ;-)
> >
> > Matt
> >
> >
> > On Thu, 2003-07-17 at 10:27, Apostoly Guillaume wrote:
> > > Already tried !
> > >
> > > In fact, this is really misterious. If i take the .class from my
> > > opencms/WEB-INF/classes and put it into another webapp, and
> > then build a jsp
> > > in that webapp that makes "new myClass()", this works. If i
> > put the same jsp
> > > into my opencms webapp directory, the class can not be
> > loaded ... I've tried
> > > all sort of possible restarts/touch the file and so on !!
> > That's X-Files ...
> > > :)
> > >
> > > > -----Message d'origine-----
> > > > De: Urich, Chase [mailto:ChaseUrich at letu.edu]
> > > > Date: jeudi 17 juillet 2003 17:45
> > > > À: opencms-dev at opencms.org
> > > > Objet: RE: TR: [opencms-dev] Help ! Resource loader error ...
> > > >
> > > >
> > > > Restart Tomcat?
> > > >
> > > > Chase Urich
> > > > LeTourneau University
> > > > Web Programmer
> > > > ---------------------
> > > > Linux: Because rebooting is for adding hardware
> > > >
> > > > -----Original Message-----
> > > > From: Apostoly Guillaume [mailto:ApostolyG at mail.europcar.com]
> > > > Sent: Thursday, July 17, 2003 8:31 AM
> > > > To: opencms-dev at opencms.org
> > > > Subject: RE: TR: [opencms-dev] Help ! Resource loader error ...
> > > >
> > > >
> > > > thanks for your help, still ... any body else ? ;)
> > > >
> > > > > -----Message d'origine-----
> > > > > De: Mark Miller [mailto:mark.miller at hema.ch]
> > > > > Date: jeudi 17 juillet 2003 14:55
> > > > > À: opencms-dev at opencms.org
> > > > > Objet: AW: TR: [opencms-dev] Help ! Resource loader error ...
> > > > >
> > > > >
> > > > > Hmmm ... sorry ... no more ideas
> > > > >
> > > > > All the best (and good luck),
> > > > >
> > > > > mark
> > > > >
> > > > > _______________________________________________
> > > > > This mail is send to you from the opencms-dev mailing list
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> > > > >
> > > > _______________________________________________
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> > > > _______________________________________________
> > > > This mail is send to you from the opencms-dev mailing list
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> > > >
> > > _______________________________________________
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> > --
> > M Butcher <mbutcher at grcomputing.net>
> > _______________________________________________
> > This mail is send to you from the opencms-dev mailing list
> > To change your list options, or to unsubscribe from the list,
> > please visit
> > http://mail.opencms.org/mailman/listinfo/opencms-dev
> >
> _______________________________________________
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--
M Butcher <mbutcher at grcomputing.net>
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