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https://issues.apache.org/jira/browse/KAFKA-2356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15003041#comment-15003041
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Guozhang Wang commented on KAFKA-2356:
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This API is already added as part of KAFKA-2274.
> Support retrieving partitions of ConsumerRecords
> ------------------------------------------------
>
> Key: KAFKA-2356
> URL: https://issues.apache.org/jira/browse/KAFKA-2356
> Project: Kafka
> Issue Type: Improvement
> Affects Versions: 0.9.0.0
> Reporter: Stevo Slavic
> Priority: Trivial
> Labels: newbie
>
> In new consumer on trunk, ConsumerRecords has method to retrieve records for
> given TopicPartition, but there is no method to retrieve TopicPartition's
> included/available in ConsumerRecords. Please have it supported.
> Method could be something like:
> {noformat}
> /**
> * Get partitions of records returned by a {@link Consumer#poll(long)}
> operation
> */
> public Set<TopicPartition> partitions() {
> return Collections.unmodifiableSet(this.records.keySet());
> }
> {noformat}
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