RE: classpath problem with ear file

[Alex Paransky]

Roxanne:

 

I am not quite sure that this was the correct solution.  Ideally, you should not have to configure ANY path's in your orion-application.xml file.  The .ear is capable of configuring any dependency you wish. 

 

In general, if you have classes which are used only by your EJB's you have 2 options:

1. Package them into the same .JAR file as your EJBs

2. Package them into a separate file and use the classpath in the manifest for your EJB.jar

 

To understand why you are having a problem, you need to read a little about how classloaders are used and what is their hierarchy.  (Honestly, I don't remember where I found this information). 

 

At the base of it all is the system classloader.  This is the one which uses CLASSPATH environment to identify location of classes.  On top of it is your EJB-ClassLoader for a particular application.  On top of the EJB-class loader is a WEB-ClassLoader for every web application you deploy.

 

Thus if you put something into WEB-INF/lib your EJB-ClassLoader will not be able to find it.  This is why you are getting this error.

 

Re-evaluate your packaging scheme to avoid ANY <library path configuration settings in orion-application.xml  I have developed an application which uses .EAR with a number of .WAR's and a number of EJB .JARs without having to configure any additional paths.  This really makes deployment easy.

 

-AP_
http://www.alexparansky.com
Java/J2EE Architect/Consultant
http://www.myprofiles.com/member/view.do?profileId=127

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Roxanne Tapia
Sent: Thursday, April 04, 2002 7:49 AM
To: Orion-Interest
Subject: Re: classpath problem with ear file

Thanks!  That worked

A further note - for anyone who has the same sort of problem, here's what I did;

I changed the orion-application.xml file to say:
    <library path="WebModule/WEB-INF/lib/" />

the path is relative to the .ear file, it took me a while to figure that out.  I was trying to set the path from the j2ee/home directory.  I just didn't get it.  

Thanks again!
Roxanne



Thomas Körner wrote:

[EMAIL PROTECTED]" type="cite">

Hi,

it is possible to set a library path in the orion-application.xml, which is
only valid in application. Use the following tag and place your jar-files
into the directory the path points towards.

<library path="./lib/" />

Ciao TK
----- Original Message -----
From: "Roxanne Tapia" <[EMAIL PROTECTED]>
To: "Orion-Interest" <[EMAIL PROTECTED]>
Sent: Wednesday, April 03, 2002 7:38 PM
Subject: classpath problem with ear file

I am deploying an ear file, which contains a war file.  The war file has
a jar in the WEB-INF/lib directory.

However, when I start the server, and it is deploying the ejb jars in
the same application - it says it can't find the classes in that jar file.

I saw this once before when some ancestor classes weren't found.  My
solution for that was to include those classes in each of the jar files.
  But in that case, there were only a couple of classes.

Is there some sort of initialization step that doesn't include the jars
in the web-inf/lib directory for the J2EE application?  Where do I put
these jars?  I can't put them in j2ee/home/lib, becasuse they could be
different between j2ee apps.

Thanks for your help,
Roxanne

-- 

===============================
Roxanne Tapia
Bioscience Division (B-1)
Los Alamos National Laboratory
505-665-0206
===============================