jeffkbkim commented on code in PR #14467:
URL: https://github.com/apache/kafka/pull/14467#discussion_r1352815096
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group-coordinator/src/main/java/org/apache/kafka/coordinator/group/generic/GenericGroup.java:
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@@ -898,6 +900,46 @@ public void createGroupTombstoneRecords(List<Record>
records) {
records.add(RecordHelpers.newGroupMetadataTombstoneRecord(groupId()));
}
+ @Override
+ public boolean isEmpty() {
+ return isInState(EMPTY);
+ }
+
+ /**
+ * Return the offset expiration condition to be used for this group. This
is based on several factors
+ * such as the group state, the protocol type, and the GroupMetadata
record version.
+ *
+ * See {@link org.apache.kafka.coordinator.group.OffsetExpirationCondition}
+ *
+ * @return The offset expiration condition for the group or Empty of no
such condition exists.
+ */
+ @Override
+ public Optional<OffsetExpirationCondition> offsetExpirationCondition() {
+ if (protocolType.isPresent()) {
+ if (isInState(EMPTY)) {
+ // No consumer exists in the group =>
+ // - If current state timestamp exists and retention period
has passed since group became Empty,
+ // expire all offsets with no pending offset commit;
+ // - If there is no current state timestamp (old group
metadata schema) and retention period has passed
+ // since the last commit timestamp, expire the offset
+ return Optional.of(new OffsetExpirationConditionImpl(
+ offsetAndMetadata ->
currentStateTimestamp.orElse(offsetAndMetadata.commitTimestampMs)));
+ } else if (usesConsumerGroupProtocol() &&
subscribedTopics.isPresent() && isInState(STABLE)) {
+ // Consumers exist in the group and group is Stable =>
+ // - If the group is aware of the subscribed topics and
retention period had passed since the
+ // last commit timestamp, expire the offset. offset with
pending offset commit are not
+ // expired
+ return Optional.of(new
OffsetExpirationConditionImpl(offsetAndMetadata ->
offsetAndMetadata.commitTimestampMs));
Review Comment:
no, commitTimestampMs is a field and not a method
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