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From Neil Bartlett <njbartl...@gmail.com>
Subject Re: Felix and scala
Date Sun, 02 Jun 2013 17:02:23 GMT

Felix, and other OSGi frameworks, can handle Scala classes just fine --
including the ones with multiple $ suffixes. I know several people using
Scala with OSGi in production.

Most likely the cause of the problem is that your bundle does not import
the package "com.gravity.goose.extractors". How have you built this bundle,
did you write the manifest by hand? Wherever possible it's best to use a
tool like bnd, which will automatically discover dependencies such as this
in compiled code and generate the manifest for you. Since bnd works with
.class files rather than source, it does not care whether the source
language is Scala, Java or anything else.


On Sun, Jun 2, 2013 at 5:18 PM, Bruce Jackson <bruce@inqmobile.com> wrote:

> Hi All
> Have an annoying problem at the moment, and I'm struggling to find a
> solution so thought I'd ask:
> I'm using Felix and have packaged up the scala runtime library and also
> Goose (https://github.com/jiminoc/goose) into bundles (along with the
> other various things they require). The goose bundle is basically just a
> lib folder containing the goose jar and then the various import/exports it
> needs.
> I have then written a simple bundle that creates a TestGoose instance from
> the activator that simply does:
> Configuration config = new Configuration();
> config.setEnableImageFetching(false);
> Goose goose = new Goose(config);
> Article article = goose.extractContent("
> http://www.bbc.co.uk/news/uk-wales-22723221");
> When I run this, I see the following error:
> Caused by: java.lang.NoClassDefFoundError: Could not initialize class
> com.gravity.goose.extractors.StandardContentExtractor$
>         at com.gravity.goose.Configuration.<init>(Configuration.scala:77)
> This same code (and library jar) works perfectly when I just create a
> 'regular' Java app with the libraries on the classpath, and looking at the
> Goose source, I'm pretty happy that I have correctly satisfied all of the
> import requirements that Goose needs. The one thing I've not seen before is
> this kind of class: com.gravity.goose.extractors.StandardContentExtractor$
> which I guess must be a Scala thing. Would there be anything in the Felix
> bundle classloader that would prevent this being loaded correctly?
> Thanks
> Bruce
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