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https://issues.apache.org/jira/browse/CAMEL-18527?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-18527.
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Resolution: Fixed
Thanks for reporting and the PR
> Camel Kafka Component: batch producer with individual headers
> -------------------------------------------------------------
>
> Key: CAMEL-18527
> URL: https://issues.apache.org/jira/browse/CAMEL-18527
> Project: Camel
> Issue Type: New Feature
> Components: camel-kafka
> Affects Versions: 3.18.2
> Reporter: Ralf
> Priority: Minor
> Fix For: 3.18.3, 3.20.0
>
>
> Hi all, if we look at classes KafkaProducer and KeyValueIterator, we see that
> it is possible to send a batch of kafka messages, but only with identical set
> of headers which is determined by the „parent“ Exchange which holds the
> Iterator or Iterable in its body.
> In our usecase, the body contains a list of Exchanges which we want to use to
> determine the individual headers for every batch-instance in the same way
> like currently the „parent“ Exchange is used. Actually we solve our demands
> by creating some copy/pasting the mentioned classes and applying minor
> changes to it (which is a dirty hack).
> Our proposal is to define a new configuration flag named like
> „batchWithIndividualHeaders“ which enables the creation of individual headers.
> To implement this, the constructor parameter „propagatedHeaders“ in class
> KeyValueHolderIterator might by replaced with some kind of Provider-Lambda
> which relays to KafkaProducer::getPropagatedHeaders, but is called inside
> KeyValueHolderIterator for every batch-element.
> IMHO this is a common usecase and worth to implement it in the camel library
> itself.
>
> see also [entry in
> dev-maillist|https://lists.apache.org/thread/t534295xdbq7nbn5ydfhjrkqo64kvnv4]
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