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From Craig McClanahan <>
Subject Re: Streams Subscriptions
Date Fri, 01 Feb 2013 22:22:58 GMT
On Fri, Feb 1, 2013 at 1:23 PM, Steve Blackmon [W2O Digital] <> wrote:

> One nice thing lucene offer is support for nested conditional logic right
> in the query - so subscribers can request very complicated filters with a
> single filter tag in the json request.  Lucene is also the basis for
> querying elastic search, and some of the largest data providers such as
> Sysomos/Marketwire - within W2O we have a large library of lucene queries
> and it would be great to use those with minimal modification to configure
> streams.
> Lucene syntax makes sense to me ... I'd rather work on the more
"interesting" problems than designing a filter syntax :-).

> But this brings up a wider topic regarding adoption - many users will be
> migrating or integrating solutions where they filter based on lucene, or
> solr, or ham crest, or regex, etcŠ  So a plug-in architecture that would
> let users who can compile java embed whatever filtering logic works best
> for them into streams, without having to commit to master would be
> advisable.  Bonus points if those plugins can bring their own class path
> via osgi or similar approach.
> So, a "filter" would become just a set of Lucene (by default) search
expressions as strings, with pluggability for how the strings actually get
interpreted?  I like it.

> Steve Blackmon
> Director, Data Sciences
> 101 W. 6th Street
> Austin, Texas 78701
> cell 512.965.0451 | work 512.402.6366
> twitter @steveblackmon
> Craig

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