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From Alex Parvulescu <alex.parvule...@gmail.com>
Subject Re: Re (OAK-36) Implement a query parser - what about indexing?
Date Thu, 22 Mar 2012 11:41:50 GMT

>  It is not yet "wired" to

That touches on the original question. How can I wire in an indexing
strategy (lucene or not) using the current api?


On Thu, Mar 22, 2012 at 9:36 AM, Thomas Mueller <mueller@adobe.com> wrote:

> Hi,
> >OAK-36 covers the Query implementation effort, but I'm wondering if now
> >would be a good time to mention indexing as well.
> >
> >We want to have dedicated indexes, I think that would be accomplished via
> >observation.
> >Any ideas about the availability of this feature?
> Sure. One such a mechanism is implemented, and currently lives under
> org.apache.jackrabbit.mk.index. It is not yet "wired" to
> org.apache.jackrabbit.oak.query.index. This mechanism stores the index
> data in nodes and properties, as a tree (using just the MicroKernel API).
> This mechanism is supposed to be as scalable as the MicroKernel
> implementation (support concurrent writes if the MicroKernel
> implementation supports it).
> >The current index implementation just traverses the existing nodes (albeit
> >applying some path constraints first),
> Yes, that's org.apache.jackrabbit.oak.query.index.TraversingReader
> >This helps with testing the query parser & friends, but a lucene based
> >query engine needs events to update its data.
> Given the scalability requirements defined at [1] (specially concurrent,
> scalable writes in multiple cluster nodes) we plan to support other
> (non-Lucene) index mechanisms as well. Personally, I believe we should use
> Lucene for fulltext indexing, because that's what Lucene is meant for. But
> I'm not sure how a fully scalable fulltext index using Lucene would look
> like. That's still an open question we need to resolve, or define the
> limitations in this area.
> [1]:
> http://wiki.apache.org/jackrabbit/Goals%20and%20non%20goals%20for%20Jackrab
> bit%203
> Regards,
> Thomas

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