RE: Interesting error when adding log JAR

> -----Original Message-----
> From: David Leangen [mailto:[email protected]]
> Sent: 06 August 2004 04:00
> To: [email protected]
> Subject: Interesting error when adding log JAR
> 
> 
> I noticed something interesting.
> 
> I am dynamically instantiating a component with a call like this:
> 
>   Factory factory = builder.getFactory();
>   Map criteria = factory.createDefaultCriteria();
>   criteria.put("merlin.deployment",
> "artifact:block:components/my-component-0.0.1");
>   criteria.put("merlin.deployment.timeout", "0");
>   factory.create( criteria );
> 
> My component works fine.
> 
> Then I add the jars from avalon/logging to my classpath and I get the
> error
> below. Took me a long time to figure out that there was a relationship
> with
> logging, since nothing of the sort is mentioned in the error messages.
> Also,
> because the error is misleading, I'm not able to figure out how to
> proceed.
> 
> 
> It's no big deal, but I thought I'd mention it anyway.


Following a quick chat with Dave it looks like this is a setup problem
linked to the bootstrap classloader established by Eclipse.  Solutions
should be possible through tweaking Eclipse.

A quick note about bootstrap classloaders for embedding - the following
jar files are needed in the classloader that is embedding Merlin
(relative to Merlin 3.4.0 SNAPSHOT):

  artifact:jar:avalon/repository/avalon-repository-main#SNAPSHOT
  artifact:jar:avalon/repository/avalon-repository-spi#2.0.0
  artifact:jar:avalon/repository/avalon-repository-api#SNAPSHOT
  artifact:jar:avalon/repository/avalon-repository-util#2.0.0
  artifact:jar:avalon/util/avalon-util-exception#1.0.0
  artifact:jar:avalon/util/avalon-util-env#1.1.1 
  artifact:jar:avalon/util/avalon-util-i18n#1.0.0
  artifact:jar:avalon/util/avalon-util-criteria#1.1.0
  artifact:jar:avalon/util/avalon-util-defaults#SNAPSHOT

Generally speaking an embeddor should aim to limit any additional
dependencies to the maximum extent possible. 

Cheers, Steve.