[ISSUE #2859]🚀Implement PutResultProcess#then_process method

[mxsm]

Which Issue(s) This PR Fixes(Closes)

Fixes #2859

Brief Description

How Did You Test This Change?

Summary by CodeRabbit

• Refactor
  • Optimized delayed message processing by streamlining the handling and storage of asynchronous results, reducing memory overhead and improving overall system efficiency.

[coderabbitai]

Walkthrough

The changes modify the message delivery and result handling process in the schedule service. In the deliver_message method, an asynchronous send result is captured instead of immediately calling the schedule service, and the result is stored via set_put_message_result. The then_process method in PutResultProcess now verifies the presence of the result and processes it by calling handle_result with a reference. Method signatures for both handle_result and on_success have been updated to accept references, and corresponding adjustments have been made in do_resend.

Changes

File	Change Summary
rocketmq-broker/.../schedule_message_service.rs	- Updated deliver_message to capture async send result into a variable. - Replaced set_future(rx) with set_put_message_result(result). - Modified then_process to call handle_result(&result) when a result is present. - Updated handle_result, on_success, and do_resend to use references instead of ownership.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant DeliveryTask as DeliverDelayedMessageTimerTask
    participant AsyncService
    participant PutProc as PutResultProcess

    Client->>DeliveryTask: deliver_message()
    DeliveryTask->>AsyncService: send message asynchronously
    AsyncService-->>DeliveryTask: result
    DeliveryTask->>PutProc: set_put_message_result(result)
    Note right of PutProc: Later during processing...
    PutProc->>PutProc: then_process()
    PutProc->>PutProc: check if result exists
    PutProc->>PutProc: handle_result(&result)
    PutProc->>Client: on_success(&result)

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Assessment against linked issues

Objective	Addressed	Explanation
Implement PutResultProcess#then_process method (#2859)	✅

Possibly related PRs

• [ISSUE #2727]🚀Stepped message delay implementation-2🍻 #2797: Modifications in PutResultProcess, particularly in handle_result, align closely with the changes made in this PR.
• [ISSUE #2857]♻️Refactor PutResultProcess #2858: Adjustments to method signatures and result handling in PutResultProcess show a strong code-level connection with this PR.

Suggested labels

feature🚀, auto merge, ready to review, waiting-review, AI review first

Suggested reviewers

• TeslaRustor
• SpaceXCN
• rocketmq-rust-bot

Poem

I’m a rabbit skipping through the lines of code,
Hopping over bugs on a winding road.
With references and results, neat and new,
My carrots of logic are shining through.
Happy hops and clever code—abracadabra in every node!

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📥 Commits

Reviewing files that changed from the base of the PR and between d76bfad and 4cc5a55.

📒 Files selected for processing (1)

• rocketmq-broker/src/schedule/schedule_message_service.rs (6 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (9)

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🔇 Additional comments (6)

rocketmq-broker/src/schedule/schedule_message_service.rs (6)

865-871: Improved message delivery implementation

This change captures the result of the asynchronous message sending operation and stores it for later processing, which aligns with the new design of using the result directly instead of futures.

---

883-883: Direct result storage replaces future handling

Replacing set_future(rx) with set_put_message_result(result) is consistent with the changes to the then_process method, allowing for more direct handling of message results.

---

1019-1025: Simplified then_process implementation

The new implementation of then_process is much more straightforward than the commented-out code. It directly checks for the presence of a result and processes it without the overhead of spawning a new task. This approach is more efficient for immediate result handling.

However, note that this changes the concurrency model - the original code processed results asynchronously in a separate task, while the new code processes them immediately in the current task.

Are you sure this change in concurrency handling won't affect the overall system behavior, especially in high-throughput scenarios?

---

1055-1055: Method signature optimization using references

Changing the method signature to accept a reference instead of taking ownership of the PutMessageResult is an excellent optimization that avoids unnecessary cloning.

---

1064-1064: Consistent use of references in on_success method

This change is consistent with the handle_result method signature change and continues the pattern of using references for better efficiency.

---

1221-1221: Updated method call to match new signature

Correctly updated to pass a reference to the result instead of the result itself, maintaining consistency with the updated method signature.

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[rocketmq-rust-bot]

🔊@mxsm 🚀Thanks for your contribution🎉！

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[Copilot]

Pull Request Overview

This pull request implements the PutResultProcess#then_process method by replacing the previously unimplemented async handling with a synchronous call to handle the PutMessageResult.

• Replace the unimplemented code in then_process with a direct call to handle_result.
• Update handle_result and on_success signatures to take references rather than values for consistency.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 27.55%. Comparing base (d76bfad) to head (4cc5a55).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...mq-broker/src/schedule/schedule_message_service.rs	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2860      +/-   ##
==========================================
- Coverage   27.55%   27.55%   -0.01%     
==========================================
  Files         527      527              
  Lines       78048    78051       +3     
==========================================
  Hits        21504    21504              
- Misses      56544    56547       +3     

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[rocketmq-rust-bot]

LGTM