AndrewJSchofield commented on code in PR #18929: URL: https://github.com/apache/kafka/pull/18929#discussion_r2095415932
########## group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupMetadataManager.java: ########## @@ -8078,6 +8092,73 @@ public List<DeleteShareGroupStateRequestData.DeleteStateData> sharePartitionsEli return deleteShareGroupStateRequestTopicsData; } + public Map.Entry<AlterShareGroupOffsetsResponseData, InitializeShareGroupStateParameters> completeAlterShareGroupOffsets( + String groupId, + AlterShareGroupOffsetsRequestData alterShareGroupOffsetsRequest, + List<CoordinatorRecord> records + ) { + Group group = groups.get(groupId); + List<AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponseTopic> alterShareGroupOffsetsResponseTopics = new ArrayList<>(); + + Map<Uuid, Set<Integer>> initializingTopics = new HashMap<>(); + Map<Uuid, Map<Integer, Long>> offsetByTopicPartitions = new HashMap<>(); + + alterShareGroupOffsetsRequest.topics().forEach(topic -> { + TopicImage topicImage = metadataImage.topics().getTopic(topic.topicName()); + if (topicImage != null) { + Uuid topicId = topicImage.id(); + Set<Integer> existingPartitions = new HashSet<>(topicImage.partitions().keySet()); + List<AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponsePartition> partitions = new ArrayList<>(); + topic.partitions().forEach(partition -> { + if (existingPartitions.contains(partition.partitionIndex())) { + partitions.add( + new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponsePartition() + .setPartitionIndex(partition.partitionIndex()) + .setErrorCode(Errors.NONE.code())); + offsetByTopicPartitions.computeIfAbsent(topicId, k -> new HashMap<>()).put(partition.partitionIndex(), partition.startOffset()); + } else { + partitions.add( + new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponsePartition() + .setPartitionIndex(partition.partitionIndex()) + .setErrorCode(Errors.UNKNOWN_TOPIC_OR_PARTITION.code()) + .setErrorMessage(Errors.UNKNOWN_TOPIC_OR_PARTITION.message())); + } + }); + + initializingTopics.put(topicId, topic.partitions().stream() + .map(AlterShareGroupOffsetsRequestData.AlterShareGroupOffsetsRequestPartition::partitionIndex) + .filter(existingPartitions::contains) + .collect(Collectors.toSet())); + + alterShareGroupOffsetsResponseTopics.add( + new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponseTopic() + .setTopicName(topic.topicName()) Review Comment: I would expect you to set topic ID at this point. In some error situations, you do not know the topic ID. Here you do and passing it back from here seems to make sense to me. ########## clients/src/main/java/org/apache/kafka/common/requests/AlterShareGroupOffsetsRequest.java: ########## @@ -58,17 +54,25 @@ public String toString() { @Override public AbstractResponse getErrorResponse(int throttleTimeMs, Throwable e) { - List<AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponseTopic> results = new ArrayList<>(); - data.topics().forEach( - topicResult -> results.add(new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponseTopic() - .setTopicName(topicResult.topicName()) - .setPartitions(topicResult.partitions().stream() - .map(partitionData -> new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponsePartition() - .setPartitionIndex(partitionData.partitionIndex()) - .setErrorCode(Errors.forException(e).code())) - .collect(Collectors.toList())))); - return new AlterShareGroupOffsetsResponse(new AlterShareGroupOffsetsResponseData() - .setResponses(results)); + Errors errors = Errors.forException(e); + return new AlterShareGroupOffsetsResponse(getErrorResponse(throttleTimeMs, errors)); + } + + public static AlterShareGroupOffsetsResponseData getErrorResponse(int throttleTimeMs, Errors error) { + return new AlterShareGroupOffsetsResponseData() + .setThrottleTimeMs(throttleTimeMs) + .setErrorCode(error.code()) + .setErrorMessage(error.message()); + } + + public static AlterShareGroupOffsetsResponseData getErrorResponse(Errors errors) { Review Comment: And here. ########## clients/src/main/java/org/apache/kafka/common/requests/AlterShareGroupOffsetsRequest.java: ########## @@ -58,17 +54,25 @@ public String toString() { @Override public AbstractResponse getErrorResponse(int throttleTimeMs, Throwable e) { - List<AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponseTopic> results = new ArrayList<>(); - data.topics().forEach( - topicResult -> results.add(new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponseTopic() - .setTopicName(topicResult.topicName()) - .setPartitions(topicResult.partitions().stream() - .map(partitionData -> new AlterShareGroupOffsetsResponseData.AlterShareGroupOffsetsResponsePartition() - .setPartitionIndex(partitionData.partitionIndex()) - .setErrorCode(Errors.forException(e).code())) - .collect(Collectors.toList())))); - return new AlterShareGroupOffsetsResponse(new AlterShareGroupOffsetsResponseData() - .setResponses(results)); + Errors errors = Errors.forException(e); Review Comment: nit: This is an error, not errors. `Errors error` would be better. -- This is an automated message from the Apache Git Service. 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