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https://issues.apache.org/jira/browse/SPARK-13106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15126054#comment-15126054
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Luis Alves commented on SPARK-13106:
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In my case, I want to store in a database the last offset processed for each
partition. The method signature with the fromOffSets argument is useful when I
already the lastest processed offset. But when I'm starting, I need to know the
earliest offset in Kafka for each partition, so ideally I would call the method
that receives the topics (but the messages should have the same metadata).
Another alternative would be to use the method getFromOffsets but it's private.
> KafkaUtils.createDirectStream method with messageHandler and topics
> -------------------------------------------------------------------
>
> Key: SPARK-13106
> URL: https://issues.apache.org/jira/browse/SPARK-13106
> Project: Spark
> Issue Type: Improvement
> Components: Streaming
> Reporter: Luis Alves
> Labels: newbie
>
> Regarding the KafkaUtils.createDirectStream method here:
> https://github.com/apache/spark/blob/master/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaUtils.scala#L473
> I purpose to also allow to pass the a messageHandler as argument instead of
> using the one that is setted inside the method:
> {code}
> val messageHandler = (mmd: MessageAndMetadata[K, V]) => (mmd.key,
> mmd.message)
> {code}
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