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From David Van Couvering <David.Vancouver...@Sun.COM>
Subject Re: Use of 3rd party libraries
Date Fri, 29 Apr 2005 21:23:14 GMT
A quick look at java.ext.dirs seems to indicate the intention for this 
is for packages with the root javax.*, which are specifically defined as 
extensions of J2SE.  Is this really the right place to put things like 
third-party JAR files?

The approach I have seen is you write your own classloader that then 
uses a property to load classes from jar files stored in a particular 
directory.  If I remember right, BEA's app server used to do this, quite 


Lance J. Andersen wrote:

> That is a very good point.  You could also use lib/ext as well and set 
> the property  java.ext.dirs property accordingly
> Jeremy Boynes wrote:
>> Lance J. Andersen wrote:
>>> There is also an issue on windows of a classpath size.  I know i have 
>>> been burnt by this before.
>> I think most projects of any size, commercial or open source, have 
>> moved away from using raw CLASSPATH and use custom classloading.
>> For example, a common technique is to have a "lib" directory where all 
>> files get added into a single classloader - not perfect especially 
>> when you may need multiple versions of a library but it works for many 
>> applications.
>> There are also things like the uberjar project at Codehaus for 
>> bundling things together.
>> -- 
>> Jeremy

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