From: Paul Sandoz <Paul.Sandoz_at_Sun.COM>
Date: Mon, 27 Apr 2009 14:28:42 +0200

On Apr 27, 2009, at 2:15 PM, James Strachan wrote:

> As mentioned on this thread...
> http://n2.nabble.com/using-Lift-templates-with-Jersey-%28was-Re%3A--Jersey--custom--TemplateProcessor-not-having-its-constructor-injected-%29-td2675518.html
>
> I've just made my first commit (yay!) to solve this issue
> https://jersey.dev.java.net/issues/show_bug.cgi?id=281
>

Great!


> by adding a new jersey-scala library (to the contribs area) along with
> an example of it in use in the samples...
> https://jersey.dev.java.net/source/browse/jersey/trunk/jersey/samples/scala-helloworld-webapp/src/main/scala/com/sun/jersey/samples/helloworld/resources/MarkupResource.scala?annotate=2305
>
> the only icky part of this is having to remember to add the
> jersey-scala package to the list of packages in your web.xml (e.g.
> look for the 'jersey.scala' in here on line 8...)
> https://jersey.dev.java.net/source/browse/jersey/trunk/jersey/samples/scala-helloworld-webapp/src/main/webapp/WEB-INF/web.xml?annotate=2305
>
> it would be nice to make jersey extensions & resource beans
> auto-discoverable (either on OSGi via a bundle activator looking for
> jersey extensions, or in non-OSGi using a META-INF/services type thing
> where all Jersey extensions can be advertised using a canonical file
> that Jersey can load on startup) - then just adding jersey-scala to
> your classpath would be enough.
> http://n2.nabble.com/-IDEA--making-resource-beans-auto-discoverable-when-making-modular--web-applications-td2389256.html#a2389256
>

You can include the writer implementation class in the file:

   META-INF/services/javax.ws.rs.ext.MessageBodyWriter

of the jersey-scala jar e.g. see the jersey-multipart module.

I liked your solution, we discussed a while ago, for a single META-INF/
services file that contains a list of classes.

Strictly speaking it is not necessary to have a META-INF/services file
specific to the interface of what is being implemented. It is sort of
a hangover from how things were initially implemented.

Paul.