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From "Jose Alberto Fernandez" <jalbe...@cellectivity.com>
Subject RE: antlib and classloaders
Date Fri, 02 Apr 2004 16:43:40 GMT
> From: Mariano Benitez [mailto:mariano@fuegolabs.com] 
> ....
> 
> The context in which I say this is: I have a big application 
> (www.fuego.com) that provides ant tasks to perform most of its admin 
> operation,
> it is a requirement to have the application installed and 
> then define a 
> property "fuego.basedir" that tells where the app is installed.
> 
> The main problem is that I cannot bundle all the required 
> files to use 
> the application in a single antlib, it would be extremely big 
> and hard 
> to update/patch/etc. without lots of manual intervention.
> 

Have you thought about using the Class-Path attribute on the manifiest
of the ANTLIB jar itself?
If your libraries location are relative to your antlib-jar location
(e.g., in a subdir) then that should work fine since Java will add 
the jars to the classloader.

> My intention is to minimize the manual steps to have a fuego antlib 
> working, so the xmlns:fuego="antlib:fuego.tools.ant" was 
> great. Using an 
> include.xml file is a good workaround but that implies that on every 
> build besides the xml namespace they need to do one more 
> step, that is a 
> 100% increase in the number or changes they need to run fuego. :)
> 
> I guess that most big application might follow this kind of 
> path, having 
> a small antlib file, and refer to the dependencies that are in the 
> application install dir.
> 
> I completely agree that for most basic/optional (core) tasks would 
> include all the dependencies in the antlib, but for a big app 
> it is not 
> possible. I guess my case is the one for tasks that are 
> bundled in other 
> applications.
> For example, if the Tomcat guys bundle their tasks with them, 
> why should 
> you copy all the jasper stuff to an antlib instead of reference them 
> from the antlib.xml
> 
> 
> 
> MAriano
> 
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