C++ support lite topic

[zhaohai666]

[C++] Support Lite topic for RocketMQ C++ client

Description

The current RocketMQ C++ client does not support Lite message topic. We need to add adaptation logic to enable producing and consuming messages with Lite topic.

Expected Behavior

1. Successfully produce messages to Lite topic
2. Successfully consume messages from Lite topic
3. Keep full compatibility with existing standard topic capabilities

Tasks

• Adapt communication protocol for Lite topic
• Update topic recognition and processing logic
• Add corresponding test cases
• Verify message sending and receiving

Labels

c++ client enhancement topic

[zhaohai666]

#1273

[RockteMQ-AI]

Issue Evaluation

Category: type/enhancement | Status: Evaluated

Thank you for this enhancement suggestion. This has been noted for community discussion.

If you'd like to contribute a fix, feel free to submit a PR. The maintainers will review and provide feedback.

---

Automated evaluation by RockteMQ-AI

[RockteMQ-AI]

Issue Evaluation

Category: type/enhancement | Status: Evaluated

Feasibility: Feasible
Scope: C++ client SDK
Compatibility: New feature — no breaking changes. Requires Proxy-side support for lite topic protocol (if any).

Adding lite topic support to the C++ client aligns with cross-language feature parity. The implementation should follow the same pattern as the Java client's lite topic support.

Key considerations:

• Verify the Proxy gRPC protocol definition already supports lite topic operations, or if protocol changes are needed
• Ensure API consistency with the Java/C#/Rust client implementations
• Consider whether this needs a feature flag or version negotiation with the Proxy

This is a reasonable feature request for the C++ SDK.

---

Automated evaluation by RockteMQ-AI

[RockteMQ-AI]

Issue Evaluation

Category: type/enhancement (new feature) | Status: Evaluated

Requesting C++ client support for lite topic (lightweight topic subscription).

Assessment: This is a feature request for the C++ SDK. The type/new feature label confirms it is tracked as such. Implementation would require coordination with the C++ client module and alignment with the Proxy gRPC protocol.

Feasibility: Depends on the Proxy-side support for lite topic. If the protocol already supports it, the C++ SDK implementation is straightforward.
Scope: C++ client module
Compatibility: Additive feature, no breaking changes.
Recommendation: Verify Proxy-side lite topic support first; then implement in C++ SDK following the same pattern as Java/Go clients.

---

Automated evaluation by RockteMQ-AI