smjn commented on code in PR #22241:
URL: https://github.com/apache/kafka/pull/22241#discussion_r3209466687
##########
core/src/main/java/kafka/server/share/ShareCoordinatorMetadataCacheHelperImpl.java:
##########
@@ -62,6 +67,68 @@ public boolean containsTopic(String topic) {
return false;
}
+ @Override
+ public Optional<String> shareGroupDlqTopic(String groupId) {
+ Properties props = metadataCache.groupConfig(groupId);
+ if (props == null || props.isEmpty()) {
+ return Optional.empty();
+ }
+ Object topicName =
props.get(GroupConfig.ERRORS_DEADLETTERQUEUE_TOPIC_NAME_CONFIG);
+ if (topicName instanceof String) {
+ return Optional.of((String) topicName);
+ }
+ return Optional.empty();
+ }
+
+ @Override
+ public boolean isDlqAutoTopicCreateEnabled() {
+ Optional<Integer> someBrokerId =
metadataCache.getRandomAliveBrokerId();
+ if (someBrokerId.isEmpty() || someBrokerId.get() < 0) {
+ return false;
+ }
+ Properties props = metadataCache.brokerConfig(someBrokerId.get());
+
+ if (props == null || props.isEmpty()) {
+ return false;
+ }
+ Object isEnabled =
props.get(GroupCoordinatorConfig.ERRORS_DEADLETTERQUEUE_AUTO_CREATE_TOPICS_ENABLE_CONFIG);
+ if (isEnabled instanceof Boolean) {
+ return (boolean) isEnabled;
+ }
+ return false;
+ }
+
+ @Override
+ public Optional<String> shareGroupDlqTopicPrefix() {
+ Optional<Integer> someBrokerId =
metadataCache.getRandomAliveBrokerId();
Review Comment:
@AndrewJSchofield This is a cluster level property as defined in KIP-1191
`errors.deadletterqueue.topic.name.prefix` -
https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=373885564#KIP1191:Deadletterqueuesforsharegroups-Clusterconfiguration
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