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From Joel Bernstein <joels...@gmail.com>
Subject Re: How to return custom collector info
Date Mon, 19 Jan 2015 21:57:03 GMT
You may want to take a look at the AnalyticsQuery:
http://heliosearch.org/custom-analytics-engine/

This is an extension to the PostFIlter API that gives you direct access to
the ResponseBuilder.

Joel Bernstein
Search Engineer at Heliosearch

On Mon, Jan 19, 2015 at 4:28 PM, tedsolr <tsmith@sciquest.com> wrote:

> I am investigating possible modifications to the CollapsingQParserPlugin
> that
> will allow me to collapse documents based on multiple fields. In a quick
> test I was able to make this happen with two fields, so I assume I can
> expand that to N fields.
>
> What I'm missing now is the extra data I need per group - the count of
> collapsed docs and a summation on one numeric field. With single field
> collapsing I could get this info from the standard stats component by using
> tagging/excluding on the post filter and setting a stats facet field. Once
> there are multiple fields, I lose the "free" stats info since faceting only
> works with one field.
>
> So I'm looking for advice on where/when to collect the extra data, and how
> to transport it back to the caller. My first thought is to compute the info
> in the collect() method of the DelegatingCollector, and store it with the
> filter (somehow) so it can be retrieved in a later custom SearchComponent.
> But I've read it is NOT a good idea to get a document within the collect()
> method. What is the right way (place) to access a doc field value (not the
> ordinal)?
>
> I read a post by Joel B. where he said you could get access to a
> ResponseBuilder directly from a post filter via a static SolrRequestInfo
> call. Does this mean I could compute the extra data I need in the post
> filter, AND write it out to the response (from the finish() method I
> guess)?
> No need for a custom SearchComponent? I was thinking I would have to follow
> the ExpandComponent model to get the data from the filter, then write it
> out
> in the process() method.
>
> This is my first attempt at customizing Solr so I may not be expressing
> myself clearly. Thank you for any pointers you can provide.
> (using Solr 4.9)
>
>
>
> --
> View this message in context:
> http://lucene.472066.n3.nabble.com/How-to-return-custom-collector-info-tp4180502.html
> Sent from the Solr - User mailing list archive at Nabble.com.
>

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