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https://issues.apache.org/jira/browse/SOLR-6150?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-6150:
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Attachment: SOLR-6150.patch
> Add new AnalyticsQuery to support pluggable analytics.
> ------------------------------------------------------
>
> Key: SOLR-6150
> URL: https://issues.apache.org/jira/browse/SOLR-6150
> Project: Solr
> Issue Type: New Feature
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Priority: Minor
> Attachments: SOLR-6150.patch
>
>
> It would be great if there was a clean simple approach to plugin custom
> analytics to Solr.
> This ticket introduces the AnalyticsQuery class which makes this possible.
> To add a custom analytic query you extend AnalyticsQuery and implement:
> {code}
> public abstract DelegatingCollector getAnalyticsCollector(ResponseBuilder
> rb, IndexSearcher searcher);
> {code}
> This method returns a custom DelegatingCollector which handles the collection
> of the analytics.
> The DelegatingCollector.finish() method can be used to conveniently finish
> your analytics and place the output onto the response.
> The AnalyticsQuery also has a nifty constructor that allows you to pass in a
> MergeStrategy (see SOLR-5973). So, when you extend AnalyticsQuery you can
> pass in a custom MergeStrategy to handle merging of analytic output from the
> shards during a distributed search.
> This design is a natural extension of the PostFilter framework. So you can
> plugin your AnalyticsQuery with a custom QParserPlugin, for example:
> {code}
> q=*:*&fq={!myanalytic param1=p1}
> {code}
> Just like PostFilters, AnalyticsQueries can be ordered using the "cost"
> parameter. This allows for analytic pipe-lining, where the result of one
> AnalyticsQuery can be pipe-lined to another AnalyticsQuery.
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