Re: [jetty-users] Custom JAR visible to web applications

[Ney André de Mello Zunino <zunino@xxxxxxxxxxxxxxx>]

Hi and sorry for the missing details; here they are:

I'm using Jetty 9.2.1 running on OpenJDK 7.

My shared JAR has been placed in my '${jetty.home}/lib/ext' which,
AFAIC, is the same as '${jetty.base}/lib/ext', since I'm not specifying
a different base. Am I right? The classes in the shared JAR have nothing
special about them. They don't use annotations.

My webapp is a very simple Servlet 2.4 application. It contains a filter
which indeed makes use of a couple of classes in the shared JAR. And
here's where the 'NoClassDefFound' error occurs. The app's also got a
Servlet which references classes in the shared JAR. And that's about it.

As I said in my original message, the JAR is definitely being added to
the classpath reported by 'java -jar start.jar --list-classpath'. I've
read about the fact that web applications prioritize libraries and
resources within their 'WEB-INF', but I expected the container's
classpath to be visible as well. Surely, I must be missing something.

Anything else I should add?

Thank you!

On 22-07-2014 20:00, Jan Bartel wrote:
> You don't say which version of jetty, nor the circumstances in which
> the class should be found - is it a servlet/filter/listener or a pojo
> or via an annotation or ...?
> 
> Have you put your jar in your ${jetty.base}/lib/ext or in the top
> level ${jetty.home}/lib/ext? Did you enable the ext module in
> ${jetty.base} or in ${jetty.home}?
> 
> Jan
> 
> On 23 July 2014 00:03, Ney André de Mello Zunino <zunino@xxxxxxxxxxxxxxx> wrote:
>> Hello.
>>
>> I'm new to Jetty and I have a question regarding class paths. I wish to
>> have a custom library (JAR) shared by multiple applications running in
>> the container. I added the JAR file to '<JETTY_HOME>/lib/ext' and
>> verified that it is actually being added to the CLASSPATH by running
>> 'java -jar start.jar --list-classpath'. However, 'NoClassDefFound'
>> errors occur when the web application is run.
>>
>> How can I make my custom JAR visible to the web application? Ideally, I
>> wish I could do that without modifying the WAR deployment so that newly
>> added applications would also have the custom JAR on their CLASSPATH
>> without extra configuration.
>>
>> Thank you in advance and sorry if the question is too trivial. I admit I
>> haven't been able to find a proper solution (given my requirements).
>>
>> --
>> Zunino
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> 
> 
> 

-- 
Ney André de Mello Zunino
Analista de Pesquisa e Desenvolvimento
Softplan/Poligraph
+55 48 3027-8000
www.softplan.com.br
twitter.com/softplanonline