hachikuji commented on code in PR #15323:
URL: https://github.com/apache/kafka/pull/15323#discussion_r1483386345
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clients/src/main/java/org/apache/kafka/clients/MetadataCache.java:
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@@ -52,7 +52,7 @@ public class MetadataCache {
private final Map<TopicPartition, PartitionMetadata> metadataByPartition;
private final Map<String, Uuid> topicIds;
private final Map<Uuid, String> topicNames;
- private Cluster clusterInstance;
+ private InternalCluster clusterInstance;
Review Comment:
The javadoc for `MetadataCache` describes it as mutable, but as far as I can
tell, we do not actually modify any of the collections. We always build new
instances instead of updating an existing one. That makes me wonder if we can
change the javadoc and use `MetadataCache` as the immutable snapshot of
metadata state. Then we could drop `InternalCluster` in favor of
`MetadataCache`. Would that work?
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