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https://issues.apache.org/jira/browse/KAFKA-7609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16681547#comment-16681547
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Ismael Juma commented on KAFKA-7609:
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Nice to see this. By the way, there was a JIRA for it: KAFKA-5255. I'll close
it as a duplicate of this one.
> Add Protocol Generator for Kafka
> --------------------------------
>
> Key: KAFKA-7609
> URL: https://issues.apache.org/jira/browse/KAFKA-7609
> Project: Kafka
> Issue Type: Improvement
> Reporter: Colin P. McCabe
> Assignee: Colin P. McCabe
> Priority: Major
>
> Rather than hand-writing the code for sending and receiving all the different
> versions of the Kafka RPC protocol, we should have a protocol generator which
> can generate this code from an interface definition language (IDL).
> This will make it less labor-intensive and error-prone to add new message
> types and versions. It will also make it easier to support these new RPC
> changes in clients such as librdkafka.
> Eventually, we should be able to get rid of the Struct classes and serialize
> messages directly to byte buffers. This will greatly reduce the garbage
> collection overhead of the network stack, especially when handling large
> messages.
> Furthermore, having a formal definition for the Kafka protocol may eventually
> allow us to expose other transports such as REST without writing lots of glue
> code to translate back and forth.
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