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https://issues.apache.org/jira/browse/SOLR-10086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15896451#comment-15896451
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Dennis Gove commented on SOLR-10086:
------------------------------------

For the other parameters, I'm thinking of just key/value strings. The reason 
being, the <evaluator> usage above allows the values to be calculated out of 
each tuple, like {code}topic=if(gt(a,b),raw("topic1"),raw("topic2")){code} 
would allow a tuple to be sent to topic1 if a > b, else go to topic2. This type 
of thing doesn't really apply for the publisher options because those are 
determined at the beginning and don't change from tuple to tuple.

> Add Streaming Expression for Kafka Streams
> ------------------------------------------
>
>                 Key: SOLR-10086
>                 URL: https://issues.apache.org/jira/browse/SOLR-10086
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrJ
>            Reporter: Susheel Kumar
>            Priority: Minor
>
> This is being asked to have SolrCloud pull data from Kafka topic periodically 
> using DataImport Handler. 
> Adding streaming expression support to pull data from Kafka would be good 
> feature to have.  



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