dajac commented on a change in pull request #9008: URL: https://github.com/apache/kafka/pull/9008#discussion_r456447554
########## File path: clients/src/main/java/org/apache/kafka/common/requests/FetchRequest.java ########## @@ -273,6 +99,28 @@ public boolean equals(Object o) { } } + private Map<TopicPartition, PartitionData> toPartitionDataMap(List<FetchRequestData.FetchTopic> fetchableTopics) { + Map<TopicPartition, PartitionData> result = new LinkedHashMap<>(); + fetchableTopics.forEach(fetchTopic -> fetchTopic.partitions().forEach(fetchPartition -> { + Optional<Integer> leaderEpoch = Optional.of(fetchPartition.currentLeaderEpoch()) + .filter(epoch -> epoch != RecordBatch.NO_PARTITION_LEADER_EPOCH); + result.put(new TopicPartition(fetchTopic.topic(), fetchPartition.partition()), + new PartitionData(fetchPartition.fetchOffset(), fetchPartition.logStartOffset(), + fetchPartition.partitionMaxBytes(), leaderEpoch)); Review comment: Yeah, `Optional` support would be awesome. I was actually thinking how to do it. I may give it a shot during the weekend ;) ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org