[ISSUE #2007]🍻Add QueueWithTime for PopBufferMergeService 🚀

[mxsm]

Which Issue(s) This PR Fixes(Closes)

Fixes #2007

Brief Description

How Did You Test This Change?

Summary by CodeRabbit

• New Features

  • Introduced a new generic queue structure with time tracking capabilities
  • Enhanced checkpoint wrapper with improved string handling

• Refactor

  • Updated key types in checkpoint wrapper from String to CheetahString

• Tests

  • Added test cases for new queue structure and its methods

[coderabbitai]

Walkthrough

This pull request introduces a new generic struct QueueWithTime<T> in the RocketMQ broker's pop buffer merge service. The struct encapsulates a VecDeque<T> with an associated timestamp, providing methods to initialize, set, and retrieve both the queue and its time. Additionally, the PopCheckPointWrapper struct has been updated to use CheetahString instead of String for its lock_key and merge_key fields, reflecting a type conversion in the implementation.

Changes

File	Change Summary
rocketmq-broker/src/processor/processor_service/pop_buffer_merge_service.rs	- Added QueueWithTime<T> struct with methods for queue and time management - Updated PopCheckPointWrapper to use CheetahString for lock_key and merge_key

Assessment against linked issues

Objective	Addressed	Explanation
[#2007] Add QueueWithTime for PopBufferMergeService	✅

Possibly related PRs

• [ISSUE #2005]🍻Add PopCheckPointWrapper for PopBufferMergeService 🚀 #2006: Introduces the PopCheckPointWrapper struct, which is directly related to the modifications in this PR

Suggested labels

feature, auto merge, ready to review, waiting-review, AI review first, rocketmq-broker crate

Suggested reviewers

• TeslaRustor
• rocketmq-rust-bot
• SpaceXCN

Poem

🐰 In the realm of queues and time so bright,
A new struct hops with algorithmic might
QueueWithTime leaps with grace and flair
Tracking moments with technical care
RocketMQ's performance takes flight! 🚀

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📜 Recent review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 3e1c21c and 06b9e95.

📒 Files selected for processing (1)

• rocketmq-broker/src/processor/processor_service/pop_buffer_merge_service.rs (6 hunks)

🔇 Additional comments (15)

rocketmq-broker/src/processor/processor_service/pop_buffer_merge_service.rs (15)

17-17: Use of VecDeque for FIFO functionality
The import of VecDeque looks appropriate for implementing queue-like behavior in this module.

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23-23: Introduction of CheetahString
Bringing in CheetahString can improve certain performance aspects related to string handling.

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25-25: Acquisition of current timestamp
Using get_current_millis() for timestamp generation is straightforward and should be fine for your use case.

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45-48: New generic struct QueueWithTime
Declaring QueueWithTime<T> with a VecDeque<T> and a time field is clear and follows good naming conventions.

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50-57: Implementation of QueueWithTime::new
This constructor correctly initializes both the queue and the time field. No issues found.

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58-61: Setter for timestamp
The set_time method is concise and easy to follow.

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62-65: Getter for timestamp
The get_time method correctly exposes the time field.

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66-69: Getter for the internal queue
Returning a reference to the internal VecDeque<T> allows for read-only access.

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70-73: Mutable access to the internal queue
Providing get_queue_mut is a natural extension, permitting in-place mutation of the queue.

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122-123: Constructing lock_key and merge_key
Properly constructing the two fields with CheetahString::from() ensures consistent usage of the new string type.

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160-161: Construction in new_with_offset
Reinforcing the same approach for lock_key and merge_key in new_with_offset maintains consistency.

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287-292: Test: queue_with_time_initializes_correctly
Verifies that the default construction sets a non-zero time and starts with an empty queue. Good coverage.

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295-299: Test: set_time_updates_time
Checks the setter method correctly updates the timestamp. Straightforward and appreciated.

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302-306: Test: get_queue_mut_returns_mutable_reference
Validates the ability to push onto the queue, confirming mutable access. Nicely done.

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85-86: Switching lock_key and merge_key to CheetahString
The transition from String to CheetahString is likely motivated by performance or memory usage benefits.

Please confirm that all references to lock_key and merge_key now work correctly with CheetahString.

✅ Verification successful

All references to lock_key and merge_key are properly handled with CheetahString

The code shows consistent and correct handling of the transition to CheetahString:

• Both fields are properly declared as CheetahString
• All construction sites properly use CheetahString::from() or CheetahString::from_string()
• The getters get_lock_key() and get_merge_key() correctly return &str references
• All interactions with other components (like QueueLockManager) properly handle the CheetahString type
• String formatting and key construction maintain compatibility with the new type

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Verify all references to lock_key and merge_key remain valid after switching to CheetahString
rg -A 3 lock_key
rg -A 3 merge_key

Length of output: 13625

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[rocketmq-rust-bot]

🔊@mxsm 🚀Thanks for your contribution🎉！

💡CodeRabbit(AI) will review your code first🔥！

Note

🚨The code review suggestions from CodeRabbit are to be used as a reference only, and the PR submitter can decide whether to make changes based on their own judgment. Ultimately, the project management personnel will conduct the final code review💥.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.50%. Comparing base (3e1c21c) to head (06b9e95).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2008      +/-   ##
==========================================
+ Coverage   28.46%   28.50%   +0.03%     
==========================================
  Files         488      488              
  Lines       68671    68704      +33     
==========================================
+ Hits        19548    19581      +33     
  Misses      49123    49123              

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