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https://issues.apache.org/jira/browse/SOLR-5045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-5045:
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Attachment: SOLR-5045.patch
Initial patch for review.
> Aggregating Collectors and AggregatorComponent
> ----------------------------------------------
>
> Key: SOLR-5045
> URL: https://issues.apache.org/jira/browse/SOLR-5045
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 5.0
> Reporter: Joel Bernstein
> Priority: Minor
> Fix For: 5.0
>
> Attachments: SOLR-5045.patch
>
>
> This ticket provides a pluggable aggregation framework through the
> introduction of a new *Aggregator* interface and a new search component
> called the *AggregatorComponent*.
> The *Aggregator* interface extends the PostFilter interface providing methods
> that allow DelegatingCollectors to perform aggregation at collect time.
> Aggregators were designed to play nicely with the CollapsingQParserPlugin
> introduced in SOLR-5027.
> The *AggregatorComponent* manages the output and distributed merging of
> aggregate results.
> This implementation combined with SOLR-5027 is designed to resolve the issues
> blocking SOLR-4465 (Configurable Collectors).
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