private void commitOffsetsForAckedTuples() {
// Find offsets that are ready to be committed for every topic partition
final Map<TopicPartition, OffsetAndMetadata> nextCommitOffsets = new HashMap<>();
for (Map.Entry<TopicPartition, OffsetEntry> tpOffset : acked.entrySet()) {
final OffsetAndMetadata nextCommitOffset = tpOffset.getValue().findNextCommitOffset();
if (nextCommitOffset != null) {
nextCommitOffsets.put(tpOffset.getKey(), nextCommitOffset);
}
}
// Commit offsets that are ready to be committed for every topic partition
if (!nextCommitOffsets.isEmpty()) {
kafkaConsumer.commitSync(nextCommitOffsets);
LOG.debug("Offsets successfully committed to Kafka [{}]", nextCommitOffsets);
// Instead of iterating again, it would be possible to commit and update the state for each
// TopicPartition
// in the prior loop, but the multiple network calls should be more expensive than iterating
// twice over a small loop
for (Map.Entry<TopicPartition, OffsetEntry> tpOffset : acked.entrySet()) {
final OffsetEntry offsetEntry = tpOffset.getValue();
offsetEntry.commit(nextCommitOffsets.get(tpOffset.getKey()));
}
} else {
LOG.trace("No offsets to commit. {}", this);
}
}
