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From Premek Brada <>
Subject Re: Archiva interest in ACE (or: cross-pollinate opportunity for maven repo OBR)?
Date Fri, 05 Nov 2010 10:54:40 GMT
Hi Steven,

On 5.11.2010 10:11, Steven Siebert wrote:
> Hi Premek,
> After reading Marcel's response, moving that code out into its own 
> bundle was pretty much my first thought.  +1 =)

Nice to hear, thanks :)

> After diving into the code last night, I noticed the OBR stuff is 
> encapsulated quite well in the the modules OBR Metadata (where the 
> indexer is), OBR Store, and OBR Servlet.  If we would be able to pull 
> this code out and export the API for the store backend, I can create 
> an adapter to deal with the pluggable nature of Apache Jackrabbits 
> FileStore.  Once we do this...I think we'll be in business. 

The OBR storage module contains the OBR API (BundleStore iface) + its 
file-based implementation, and the OBR metadata is able to generate OBR 
repository index file for a given directory. It actually exposes the 
indexer as a service. Is the BundleStore what you meant by the "store 
backend API"?

So, if I understand it correctly, providing for another store would mean 
creating its implementation (the adapter) of the BundleStore + another 
indexer operating on top of that implementation, which the BundleStore 
impl uses to generate the index file.

Actually, looking at it, it seems there should be no need to pull any 
code out. We could just have two separate bundles with new code and 
dependencies on the OBR Storage and OBR Metadata bundles, to access the 
interfaces they define.

Not sure I haven't missed something. Does this look ok?


> Thoughts?
> Thanks!
> Steve
> On Fri, Nov 5, 2010 at 4:07 AM, Premek Brada < 
> <>> wrote:
>     Hello all,
>     On 4.11.2010 22:18, Marcel Offermans wrote:
>         Hello Steve,
>         On 4 Nov 2010, at 17:08 , Steven Siebert wrote:
>             In previous discussions with Brett Porter (CC'ed) he I and
>             I discussed
>             working together on exposing the archiva jackrabbit-based
>             maven repo through
>             an OBR interface.  In what we discussed this afternoon, I
>             think there could
>             be an opportunity to cross-pollinate across the projects,
>             just based on the
>             commonality (without looking at the code yet).  I just
>             spoke again to Brett,
>             and before I forget, I figured I would send an email out
>             on the subject. =)
>         That definitely sounds interesting. The "OBR" that is included
>         in ACE consists of a couple of bundles. By default we include
>         these as part of the ACE server. They can also be deployed in
>         a stand-alone OSGi framework. Option number three is not using
>         them at all but instead hooking up to an external repository
>         that exposes the same OBR metadata.
>         ACE actually contains code that scans a directory and
>         (re)generates OBR metadata based on its contents. Maybe that
>         code could be used to do the same for the archiva
>         jackrabbit-based maven repository?
>     Coincidentally, I had a discussion yesterday with a student of
>     mine who is working on a diploma project using ACE OBR, which for
>     our purposes would need the indexer core (that re-generates OBR
>     metadata) to be extended.  We thus thought of factoring the
>     indexer code out into a separate bundle/service.
>     Would such a refactoring help to use OBR interface with the
>     archiva repo?  If yes, we could offer some help.
>     Premek
>     -- 
>     Premek Brada (Ing et MSc, PhD)
>      Lecturer in Software enginering, Webmaster
>      Department of Computer Science and Engineering
>      University of West Bohemia, Pilsen, CZ
>     <<  brada at <> |
> <> |
>     +420-377-63-2435>>

Premek Brada (Ing et MSc, PhD)
   Lecturer in Software enginering, Webmaster
   Department of Computer Science and Engineering
   University of West Bohemia, Pilsen, CZ
   <<  brada at | | +420-377-63-2435>>

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