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https://issues.apache.org/jira/browse/BEAM-5149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luke Cwik resolved BEAM-5149.
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Resolution: Fixed
Fix Version/s: 2.12.0
> Add support to the Java SDK harness to merge windows
> ----------------------------------------------------
>
> Key: BEAM-5149
> URL: https://issues.apache.org/jira/browse/BEAM-5149
> Project: Beam
> Issue Type: Sub-task
> Components: sdk-java-harness
> Reporter: Luke Cwik
> Assignee: Luke Cwik
> Priority: Major
> Labels: portability, triaged
> Fix For: 2.12.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Window merging function:
>
> {code:java}
> Input: KV<nonce, iterable<OriginalWindow>>
> Output: KV<nonce, KV<iterable<UnmergedOriginalWindow>,
> iterable<KV<MergedWindow, iterable<ConsumedOriginalWindow>>>>
> {code}
> For each set of original windows, a list of all unmerged windows is output
> alongside a map of merged window to set of consumed windows. All original
> windows must be contained in either the unmerged original window set or one
> of the consumed original window sets. Each original window can only be part
> of one output set. The nonce is used by a runner to associate each input with
> its output. The nonce is represented as an opaque set of bytes.
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