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From Michael Dürig <>
Subject Re: Common Scala Bundles
Date Thu, 01 Jul 2010 21:46:19 GMT

Hi Reto,

> The scala 2.7 based version in clerezza was based on the one from
> sling. The 2.8 version started from scratch.
Ok I understand. So it might still be a good idea to start out with the 
Scala script engine form clerezza and try to integrate the requirements 
for Sling. That shouldn't be too difficult I think.

> I'm not sure if the scala-incubator would allow to have thing in the
> maven central repo fast enough.
Probably true. So Apache Commons would probably the best place for the 
time being. When it becomes more mature and attracts some interest from 
the Scala community, it might still make sense to contribute it then.


> Cheers,
> reto
> On Thu, Jul 1, 2010 at 6:15 PM, Michael Dürig<>  wrote:
>> Hi,
>> Thanks for bringing this up again. The Scala scripting engine for Sling
>> evolved somewhat since it was copied over to clerezza: Sling dependencies
>> have been removed and factored out. AFIK the current version used in
>> clerezza does not fulfill some of the requirements of the Sling scripting
>> engine (configurability, abstraction of file system). However, since I wont
>> be able to contribute much in the coming weeks, I think the version of
>> clerezza might well serve as a starting point. I'd be happy to merge the
>> changes required by Sling into it later on.
>> However, I think the Scala incubator [1] might be a better place for the
>> Scala scripting engine. That way there is the chance for it making it into
>> the Scala distro some time in the future.
>> Michael
>> On 1.7.10 17:47, Reto Bachmann-Gmuer wrote:
>>> In apache clerezza we need scala in a way that:
>>> - it can be used in an osgi container
>>> - it exposes the scripting interfaces as per JSR 223 (javax.scripting)
>>> At least the sling project has very similar requirements on the
>>> foundation of their scala support, so I think it would be good to pool
>>> this efforts and I'm wondering if this would best be pursued as an
>>> Apache Comons project.
>>> We have done a first implementation consisting of 3 bundles, 2 bundles
>>> seem to be analogous to the ones available here
>>> (I didn't know about them originally, and the yhave the disadvantage
>>> of not being in maven central). Our implementations has no
>>> dependencies on other clerezza components.
>>> The source of our implementation is here:
>>> The current implementation is quite minimalistic and merging it with
>>> the best from the scala support in sling could bring big improvements,
>>> but as far as I know there's no other  javax.scripting implementation
>>> for scala 2.8.
>>> Cheers,
>>> reto

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