HELP: class reloading or hot deployment with tomcat / Catalina ?? ???

[tamir <ta...@movious.com>]

Hi there,
I'd really apperciate if anybody can give me a hint or how to relate this
issue to tomcat.

I've been struggling with this problem for two days now.
I wonder if any one have a solution.

I'm using Tomcat 3.3, but would apperciate any solution with Tomcat 4.02

The problem:
How to perfrom hot deployment for a jar file, which sits outside the
web-inf/lib (or class outside web-inf/classes).
I'd like this jar to be auto-reloaded, without my project to be reloaded.
When I put this jar inside web-inf/lib it reloads the whole server and the
session is lost.
It causes many troubles, and also the files in the jar file can't be
accessed from outside.

I tried to create my own classload using URLClassLoader inherited from
Thread.currentThread().getContextClassLoader(),
so the new created class will know all the classes created by tomcat at
web-inf/classes.
Then I create the class and everything goes well.

My problem is that the class isn't reloaded when I put the new jar in the
directory.
Here is my code:

      ClassLoader ccl = Thread.currentThread().getContextClassLoader();
      URL [] jarFile = new URL[1];
      jarFile[0] = new URL(new
String("/movious/portlets/mss_"+className+".jar"));
      System.out.println("before loader");
      loader = new URLClassLoader(jarFile,ccl);

//      System.out.println("after loader");
      Class c = loader.loadClass(className);

      Object o = c.getConstructors()[0].newInstance(new Object[] {aData});
            System.out.println("after load class"+o);

      //clip = (APortletItf) o;
      //clip.init(aPortletData);
      return  (APortletItf)o;

Each time I create a new class loader, however, the same class file is
retieved.
When I restart tomcat, It offcourse works ok.

Tnx again for you help and support
Tamir




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