Warbler: using a jar included in the built jar

Ruby JRuby
1

Hi,

The code I’m trying to package in a jar with warbler uses jar files in
the
lib/ directory.

I replaced the code of the script running fine in the terminal
Dir[“#{File.dirname(FILE)}/…/lib//.jar”].each { |jar| puts jar;
require jar }
by this
Dir[“lib//.jar”].each { |jar| puts jar; $CLASSPATH << jar }

(as mentioned on
jruby - JAR generated by warbler cannot access included internal JAR library - Stack Overflow).

The java_imports run fine, but there is still an error (not present when
running the script in the terminal):

3199 [main] WARN org.eclipse.jetty.webapp.StandardDescriptorProcessor -
Could not instantiate listener
org.eclipse.jetty.servlet.listener.ELContextCleaner
java.lang.ClassNotFoundException:
org.eclipse.jetty.servlet.listener.ELContextCleaner

and again the same message about
org.eclipse.jetty.servlet.listener.IntrospectorCleaner .
These classes are in a jar under /lib, that was added to the classpath.
Other classes loaded from jar files seem to be accessible.

Is $CLASSPATH << jar sufficient or should I issue another command?
And why are other classes apparently accessible?

Thx for your help

Raph

2

so you are running jetty and is jetty not finding some classes ?

CLASSPATH environment feels wrong especially if jetty tries to setup
some
context-classloaders for the webapp.

  • christian
3

On Mon, Jan 13, 2014 at 4:30 PM, christian [email protected] wrote:

so you are running jetty and is jetty not finding some classes ?

yes. I pasted the full error message at http://pastie.org/8629602

CLASSPATH environment feels wrong especially if jetty tries to setup some
context-classloaders for the webapp.

Do you mean I should not modify the classpath?

I added a java_import for each problematic class in the code and these
are
successful:

java_import ‘org.eclipse.jetty.servlet.listener.ELContextCleaner’
java_import ‘org.eclipse.jetty.servlet.listener.IntrospectorCleaner’

I wonder why jetty doesn’t find them…

Raph

4

On Mon, Jan 13, 2014 at 4:50 PM, christian [email protected] wrote:

this is warfile or jarfile ?

This is a jarfile. The ruby code instantiates a Jetty server.

loading classes into the jruby-classloader does not make jetty find them
since the webapp-classloader is probably the parent-classloader of the
jruby-classloader.

make warble pack your jar into the WEB-INF/lib directory - assuming you
build a wargfile with warbler.

and for a jar?

thx for your help

Raph

5

this is warfile or jarfile ?

loading classes into the jruby-classloader does not make jetty find them
since the webapp-classloader is probably the parent-classloader of the
jruby-classloader.

make warble pack your jar into the WEB-INF/lib directory - assuming you
build a wargfile with warbler.

6

hmm.

I guess that is more a jetty problem, i.e. where to put the jars and how
to
setup the context config for jetty. I doubt jetty will be able to load
jar
packed inside a jar - that is jruby only feature !!!

I guess you need to explode the webapp for jetty somewhere and run it
from
the filesystem.

-christian

7

On Mon, Jan 13, 2014 at 5:15 PM, christian [email protected] wrote:

hmm.

I guess that is more a jetty problem, i.e. where to put the jars and how
to setup the context config for jetty. I doubt jetty will be able to load
jar packed inside a jar - that is jruby only feature !!!

ok I see. thx for your help.

8

thanx for the follow-up - did know that detail :wink:

  • christian
9

FYI, it is possible to specify the class loader to be used by a jetty
context:
web_context.setClassLoader(JRuby.runtime.jruby_class_loader)

This solved the problem I had

Cheers

raph