TcpChannelTask Refactoring

[nslee333]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @nslee333, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly refactors the TCP client channel implementation. The primary objective is to enhance the flexibility and maintainability of the client creation process by introducing a ClientOptions builder pattern. This change centralizes various client settings, such as request queuing limits and decoding preferences, and introduces a new strategy for connection logging. Furthermore, the internal logic of the TcpChannelTask has been streamlined through the extraction of complex error handling and connection state management into distinct, reusable methods, leading to a cleaner and more robust codebase.

Highlights

• Client Configuration Centralization: Introduced a ClientOptions struct to consolidate client configuration parameters such as maximum queued requests, decode level, and connection logging strategy, providing a unified approach to client setup.
• Flexible Client API: Refactored spawn_tcp_client_task and added spawn_tcp_client_task_2 to allow for more flexible client creation, enabling users to either leverage default options or provide a fully customized ClientOptions struct.
• Improved Error Handling and State Management: Extracted connection error handling and state update logic within TcpChannelTask into dedicated private methods (connected, failed_tcp_connection, failed_tcp_stream_connection) for enhanced readability and maintainability.
• Enhanced Connection Logging: Introduced a ConnectionLoggingStrategy enum to control the verbosity of connection and disconnection logging, allowing for more granular control over diagnostic output.
• FFI Lifetime Parameter Fix: Added explicit lifetime parameters to BitValueIterator and RegisterValueIterator in FFI functions to ensure correct lifetime inference and improve memory safety within the FFI boundary.

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[gemini-code-assist]

Code Review

This pull request introduces a ClientOptions builder for configuring the TCP client, which is a great step towards a more extensible and clear API. The refactoring within TcpChannelTask also improves code structure. My review focuses on a few areas to enhance consistency and clarity: renaming a new function for better descriptiveness, addressing an unused field which might indicate incomplete work, and completing the ClientOptions refactoring for the TLS client path to match the plain TCP implementation.

[gemini-code-assist]

The refactoring to use ClientOptions has been applied to the plain TCP client, but not consistently to the TLS client. In create_tls_channel, ConnectionLoggingStrategy::All is hardcoded, and other options like max_queued_requests and decode are still passed as separate arguments.

For API consistency, the TLS client creation functions (spawn_tls_client_task in client/mod.rs and create_tls_channel here) should be updated to accept ClientOptions. This would allow users to configure all client options for TLS connections, just as they can for plain TCP.

[gemini-code-assist]

The function name spawn_tcp_client_task_2 is not idiomatic. A more descriptive name like spawn_tcp_client_task_with_options would better reflect its purpose. Consider also deprecating the older spawn_tcp_client_task function to guide users towards the new, more flexible API.

Suggested change

	pub fn spawn_tcp_client_task_2(
	pub fn spawn_tcp_client_task_with_options(

[gemini-code-assist]

The field _logging_strategy is added to TcpChannelTask and initialized, but it's never used. The _ prefix indicates this is intentional to avoid compiler warnings, but it's unclear why an unused field is being added.

If this is for future use, please add a // TODO comment explaining its purpose. If it's not intended to be used, it should be removed. If the intention is to control logging, it should be used to conditionally enable/disable logging statements, for example in failed_tcp_connection and failed_tcp_stream_connection.