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https://issues.apache.org/jira/browse/KAFKA-16666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chia-Ping Tsai resolved KAFKA-16666.
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Resolution: Fixed
> Migrate `TransactionLogMessageFormatter`, GroupMetadataMessageFormatter` and
> `OffsetsMessageFormatter`to tools module
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-16666
> URL: https://issues.apache.org/jira/browse/KAFKA-16666
> Project: Kafka
> Issue Type: Improvement
> Reporter: Chia-Ping Tsai
> Assignee: 黃竣陽
> Priority: Blocker
> Fix For: 3.9.0
>
>
> `GroupMetadataMessageFormatter`[0], `OffsetsMessageFormatter`[1], and
> `TransactionLogMessageFormatter`[2] are used by ConsoleConsumer to parse data
> of internal topics. Following the migration plan, we should move them to
> tools-api module. Also, we need to keep the compatibility of command line.
> -That is to say, `ConsoleConsumer` can accept the previous package name and
> then use the (java) implementation to parse and make same output.-
> The Scala formatter output is not json format, thus the new Java formatter
> will leverage the protocol by json mechanism.
> [0]
> [0]
> [https://github.com/apache/kafka/blob/376e9e20dbf7c7aeb6f6f666d47932c445eb6bd1/core/src/main/scala/kafka/coordinator/group/GroupMetadataManager.scala#L1269]
> [1]
> [https://github.com/apache/kafka/blob/376e9e20dbf7c7aeb6f6f666d47932c445eb6bd1/core/src/main/scala/kafka/coordinator/group/GroupMetadataManager.scala#L1248]
> [2]
> [https://github.com/apache/kafka/blob/9b8aac22ec7ce927a2ceb2bfe7afd57419ee946c/core/src/main/scala/kafka/coordinator/transaction/TransactionLog.scala#L145]
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