rocketmq-client/src/consumer/ack_callback.rs (2)

21-37: Consider enhancing the trait with async support

The trait design is clean, but given this is a callback interface, consider these improvements:

1. Make the methods async to better handle potential I/O operations
2. Consider returning Result to propagate errors
3. Consider using generics for more flexible error types

Here's a suggested enhancement:

pub trait AckCallback {
-    fn on_success(&self, ack_result: AckResult);
-    fn on_exception(&self, e: Box<dyn Error>);
+    async fn on_success(&self, ack_result: AckResult) -> Result<(), Box<dyn Error>>;
+    async fn on_exception(&self, e: Box<dyn Error>) -> Result<(), Box<dyn Error>>;
}

Or with generic error type:

pub trait AckCallback {
    type Error: std::error::Error + Send + Sync + 'static;
    
    async fn on_success(&self, ack_result: AckResult) -> Result<(), Self::Error>;
    async fn on_exception(&self, e: Box<dyn Error>) -> Result<(), Self::Error>;
}

---

1-47: Consider additional Rust-specific enhancements

While the current implementation successfully converts the Java AckCallback to Rust, consider these Rust-specific enhancements:

1. Add a builder pattern for complex callback configurations
2. Implement common traits like Default for simple acknowledgments
3. Consider using a more specific error type instead of the generic Error trait
4. Add examples in documentation showing common usage patterns

Would you like me to provide example implementations for any of these suggestions?

Configuration used: .coderabbit.yaml
Review profile: CHILL

#!/bin/bash
# Search for AckResult definition to verify thread safety traits
ast-grep --pattern 'struct AckResult {
  $$$
}'

# Also check for potential derives or manual implementations
rg -A 5 "impl.*for.*AckResult" 
rg -A 5 "#\[derive\].*struct AckResult"

#!/bin/bash
# Let's check the complete AckResult definition and its derives
cat rocketmq-client/src/consumer/ack_result.rs

#!/bin/bash
# Let's check the dependencies to verify thread safety
# First, check AckStatus
cat rocketmq-client/src/consumer/ack_status.rs

# Then, check what CheetahString is and its thread safety
rg -l "CheetahString"

rocketmq-client/src/consumer/ack_callback.rs (1)

24-29: Consider enhancing documentation with examples and more details.

While the basic documentation is present, it could be more helpful with:

1. Usage examples
2. Return value documentation (even if void)
3. Explanation of when these callbacks are invoked
4. Potential error scenarios for on_exception

 /// Called when the acknowledgment is successful.
 ///
 /// # Arguments
 ///
 /// * `ack_result` - The result of the acknowledgment.
+///
+/// # Returns
+///
+/// This method doesn't return a value.
+///
+/// # Examples
+///
+/// ```
+/// use rocketmq_client::consumer::ack_callback::AckCallback;
+/// use rocketmq_client::consumer::ack_result::AckResult;
+///
+/// struct MyCallback;
+///
+/// impl AckCallback for MyCallback {
+///     fn on_success(&self, result: AckResult) {
+///         println!("Acknowledgment successful: {:?}", result);
+///     }
+///
+///     fn on_exception(&self, e: Box<dyn Error>) {
+///         eprintln!("Acknowledgment failed: {}", e);
+///     }
+/// }
+/// ```

Also applies to: 31-36

Configuration used: .coderabbit.yaml
Review profile: CHILL