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https://issues.apache.org/jira/browse/BEAM-7508?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía updated BEAM-7508:
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Component/s: sdk-java-core
> Expose the current key to the CombineFn
> ---------------------------------------
>
> Key: BEAM-7508
> URL: https://issues.apache.org/jira/browse/BEAM-7508
> Project: Beam
> Issue Type: Improvement
> Components: sdk-ideas, sdk-java-core
> Reporter: Luke Cwik
> Priority: Major
>
> One can not currently access the key during combining. Having access to the
> key can be useful during various phases.
> There is a less then ideal workaround where the user embeds the key within
> the value turning the combiner over *<K, V>* into a combiner over *<K, <K,
> V>>*.
>
> Originally asked in
> [https://stackoverflow.com/questions/56451796/how-can-i-access-the-key-in-subclass-of-combinerfn-when-combining-a-pcollection]
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