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https://issues.apache.org/jira/browse/SOLR-8487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15435610#comment-15435610
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Dennis Gove commented on SOLR-8487:
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I'm working on this. Hoping to have a first draft in a day or two.
> Add CommitStream to Streaming API and Streaming Expressions
> -----------------------------------------------------------
>
> Key: SOLR-8487
> URL: https://issues.apache.org/jira/browse/SOLR-8487
> Project: Solr
> Issue Type: New Feature
> Affects Versions: 6.0
> Reporter: Jason Gerlowski
> Priority: Minor
> Fix For: 6.0
>
>
> (Paraphrased from Joel's idea/suggestions in the comments of SOLR-7535).
> With SOLR-7535, users can now index documents/tuples using an UpdateStream.
> However, there's no way currently using the Streaming API to force a commit
> on the collection that received these updates.
> The purpose of this ticket is to add a CommitStream, which can be used to
> trigger commit(s) on a given collection.
> The proposed usage/behavior would look a little bit like:
> {{commit(collection, parallel(update(search()))}}
> Note that...
> 1.) CommitStream has a positional collection parameter, to indicate which
> collection to commit on. (Alternatively, it could recurse through
> {{children()}} nodes until it finds the UpdateStream, and then retrieve the
> collection from the UpdateStream).
> 2.) CommitStream forwards all tuples received by an underlying, wrapped
> stream.
> 3.) CommitStream commits when the underlying stream emits its EOF tuple.
> (Alternatively, it could commit every X tuples, based on a parameter).
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