showuon commented on a change in pull request #10952:
URL: https://github.com/apache/kafka/pull/10952#discussion_r666157068
##########
File path: clients/src/main/java/org/apache/kafka/clients/Metadata.java
##########
@@ -367,7 +386,8 @@ else if (metadata.error() ==
Errors.TOPIC_AUTHORIZATION_FAILED)
*/
private Optional<MetadataResponse.PartitionMetadata> updateLatestMetadata(
Review comment:
We should also update the java doc to mention the TopicId changed case
##########
File path: clients/src/main/java/org/apache/kafka/clients/MetadataCache.java
##########
@@ -130,13 +149,30 @@ MetadataCache mergeWith(String newClusterId,
Set<String> addInvalidTopics,
Set<String> addInternalTopics,
Node newController,
+ Map<String, Uuid> topicIds,
BiPredicate<String, Boolean> retainTopic) {
Predicate<String> shouldRetainTopic = topic -> retainTopic.test(topic,
internalTopics.contains(topic));
Map<TopicPartition, PartitionMetadata> newMetadataByPartition = new
HashMap<>(addPartitions.size());
+ Map<String, Uuid> newTopicIds = new HashMap<>(topicIds.size());
+
+ // We want the most recent topic ID. We add the old one here for
retained topics and then update with newest information in the MetadataResponse
+ // we add if a new topic ID is added or remove if the request did not
support topic IDs for this topic.
Review comment:
Can't get what you mean here. Could you rephrase this sentence?
##########
File path: clients/src/main/java/org/apache/kafka/clients/Metadata.java
##########
@@ -216,6 +217,14 @@ public synchronized boolean updateRequested() {
}
}
+ public synchronized Uuid topicId(String topicName) {
+ return cache.topicId(topicName);
+ }
+
+ public synchronized String topicName(Uuid topicId) {
Review comment:
nit: 2 spaces between `synchronized` and `String`
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