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Posted to jira@kafka.apache.org by "Justine Olshan (Jira)" <ji...@apache.org> on 2021/12/07 17:25:00 UTC

[jira] [Created] (KAFKA-13512) topicIdsToNames and topicNamesToIds allocate unnecessary maps

Justine Olshan created KAFKA-13512:
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             Summary: topicIdsToNames and topicNamesToIds allocate unnecessary maps
                 Key: KAFKA-13512
                 URL: https://issues.apache.org/jira/browse/KAFKA-13512
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 3.1.0
            Reporter: Justine Olshan
            Assignee: Justine Olshan


Currently we write the methods as follows:

{{def topicNamesToIds(): util.Map[String, Uuid] = {}}
{{    new util.HashMap(metadataSnapshot.topicIds.asJava)}}
{{}}}

We do not need to allocate a new map however, we can simply use

{{Collections.unmodifiableMap(metadataSnapshot.topicIds.asJava)}}

We can do something similar for the topicIdsToNames implementation.



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