On Fri, Oct 24, 2008 at 4:56 AM, Artem Melentyev <[EMAIL PROTECTED]> wrote:
> Hi.
>
> I just committed JCRStore prototype based on JCRv1 to sandbox/jcrstore
> Ideas of the prototype:
>
> 1. use value objects for storage (xwiki data model proposal:
> sandbox/org.xwiki.model)
>  org.xwiki.store.value.*
>  value objects allow us to eliminate xwiki-core dependency in
> jcrstore.
>  we can reuse value objects in new data model later as in
> sandbox/org.xwiki.model.
>
> 2. put all storage specific code in DAO classes.
>  Stores will remain only business code and delegate storage stuff to DAOs.
> (stores will deprecated by new data model later)
>
> 3. convert value objects to/from xwiki business objects.
>  org.xwiki.store.value.ValueConverter
>
> planed jcr hierarchy:
> (node name (node type))
> /
>  <space> (xwiki:space)
>   <docname> (xwiki:document)
>    objects
>     <class.name>
>      <number> (xwiki:object)
>       properties (Jcr Value or Value[])
>    attachments
>     <filename> (xwiki:attachment extends nt:resource)
>    lock (xwiki:lock)
>    translations
>     <language> (xwiki:document) (translations of document)

What about multiples wikis ? Is it different storages units (I don't
know much about JCR) ?

>
> the main problem:
> JCRStore needs JCRSQL2 language from JCRv2 (JCRv1 has very limited query
> languages), but:
>
> JSR-283 aka JCR v2 isn't still out. It was planed for September.
> http://jcp.org/en/jsr/detail?id=283
>
> Jackrabbit's JCRSQL2 parser is still in progress (and unusable yet).
> eXoJCR v2 also in progress: http://jira.exoplatform.org/browse/JCRS
>
> I'm afraid JCR v2 may not release before XE-1.7. JCRv2 release was
> shifted several times before. :(.
>
> JcrStore plans:
> implement base JcrDAOs. (JcrDocumentDAO is ready)
> try to run xwiki on jcrstore. (not fully possible without JCRSQL2, but
> may show some problems in store)
> implement XWQL to JCRSQL2 translator.
> wait for JCRv2 or at least working JCRSQL2.
> test XWQL on JCRSQL2.
> rewrite all HQL queries to XWQL.
>
> Delivery date:
>  If JCRv2 (or JCRSQL2) will release in a ~week then I'll implement base
> functionality in 1.7M2 and improve it in 1.7RC1.
>  If not then 1.8M1
>
> PS: I'm sorry for long delay. I was ill 2.5 last weeks. It very reduce
> my activity.
>
> --
>   Artem Melentyev
>
> _______________________________________________
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> [email protected]
> http://lists.xwiki.org/mailman/listinfo/devs
>



-- 
Thomas Mortagne
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