[Metastarx]

Which Issue(s) This PR Fixes

• Fixes feat: add lite topic listing admin API and command #11450

Brief Description

RocketMQ currently exposes an aggregate lite topic count plus single-topic and single-client lookups, but there is no broker-side way to enumerate the dynamically created lite topics under a parent topic. This change adds a GET_LITE_TOPIC_LIST request with a required parent topic, an optional name prefix, and a bounded maxCount, and the broker returns each lite topic's offsets, last update time, subscriber count, and sharding ownership together with a hasMore truncation flag. The new client, admin, and DefaultMQAdminExt methods are wired through a getLiteTopicList mqadmin command (also available as listLiteTopic) that prints one table row per broker, and the LMQ guide documents the command and sample output.

How Did You Test This Change?

mvn test -pl broker,client,remoting,tools - passed (Tests run: 172, Failures: 0, Errors: 0, Skipped: 5)

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.56818% with 43 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.04%. Comparing base (5d68880) to head (d0f94fa).
⚠️ Report is 13 commits behind head on develop.

Files with missing lines	Patch %	Lines
...tools/command/lite/GetLiteTopicListSubCommand.java	53.12%	29 Missing and 1 partial ⚠️
...ocketmq/broker/processor/LiteManagerProcessor.java	89.09%	2 Missing and 4 partials ⚠️
...g/apache/rocketmq/client/impl/MQClientAPIImpl.java	0.00%	5 Missing ⚠️
...apache/rocketmq/tools/admin/DefaultMQAdminExt.java	0.00%	1 Missing ⚠️
...he/rocketmq/tools/admin/DefaultMQAdminExtImpl.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #11451      +/-   ##
=============================================
+ Coverage      49.76%   50.04%   +0.28%     
- Complexity     14377    14567     +190     
=============================================
  Files           1390     1394       +4     
  Lines         103262   103557     +295     
  Branches       13504    13548      +44     
=============================================
+ Hits           51392    51830     +438     
+ Misses         45681    45501     -180     
- Partials        6189     6226      +37     

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[RockteMQ-AI]

Suggestions

1. Remove broker/null/config/delayOffset.json — likely an accidental commit.
2. Add a server-side cap on maxCount in the processor (e.g., Math.min(maxCount, 10000)).
3. Wrap Integer.parseInt in the SubCommand with a user-friendly error message.

Overall

The implementation is clean, follows existing patterns for lite topic admin commands, and has good test coverage. The protocol design (reusing LiteTopicRequestHeader, adding hasMore for pagination) is sound. Addressing the accidental file and the two warnings above would make this ready to merge.

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Automated review by github-manager-bot

[Metastarx]

Addressed in bb28e1b.

[yx9o]

Could we distinguish the broker's hard limit from the requested limit in this hint? Once 10,000 matching lite topics are returned, increasing -m cannot list any more because the broker clamps it to MAX_RETURN_COUNT; suggesting a narrower prefix would give operators an actionable next step.

[Metastarx]

Addressed in d0f94fa.