Files that changed from the base of the PR and between 18afaac and ae75277.

• rocketmq-client/Cargo.toml (1 hunks)
• rocketmq-client/examples/transaction/transaction_producer.rs (1 hunks)
• rocketmq-client/src/factory/mq_client_instance.rs (5 hunks)
• rocketmq-client/src/hook/end_transaction_context.rs (1 hunks)
• rocketmq-client/src/hook/send_message_context.rs (2 hunks)
• rocketmq-client/src/implementation/client_remoting_processor.rs (4 hunks)
• rocketmq-client/src/implementation/mq_client_api_impl.rs (2 hunks)
• rocketmq-client/src/lib.rs (1 hunks)
• rocketmq-client/src/producer.rs (1 hunks)
• rocketmq-client/src/producer/default_mq_producer.rs (2 hunks)
• rocketmq-client/src/producer/local_transaction_state.rs (2 hunks)
• rocketmq-client/src/producer/mq_producer.rs (1 hunks)
• rocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rs (16 hunks)
• rocketmq-client/src/producer/producer_impl/mq_producer_inner.rs (2 hunks)
• rocketmq-client/src/producer/transaction_mq_produce_builder.rs (1 hunks)
• rocketmq-client/src/producer/transaction_mq_producer.rs (1 hunks)
• rocketmq-common/src/common/message/message_decoder.rs (5 hunks)
• rocketmq-common/src/common/message/message_id.rs (1 hunks)
• rocketmq-common/src/utils/util_all.rs (1 hunks)
• rocketmq-remoting/src/protocol/header.rs (1 hunks)
• rocketmq-remoting/src/protocol/header/end_transaction_request_header.rs (1 hunks)
• rocketmq-remoting/src/protocol/remoting_command.rs (1 hunks)

• rocketmq-client/src/lib.rs

rocketmq-common/src/common/message/message_id.rs (1)

20-21: LGTM! Appropriate trait implementations for message identification.

The added traits (Clone, PartialEq, Eq, Copy) and public visibility are well-suited for message identification in a distributed system. The implementation is safe as both fields (SocketAddr and i64) implement these traits.

rocketmq-client/src/hook/end_transaction_context.rs (1)

21-29: Verify transaction state handling across the codebase.

The introduction of transaction state handling might require consistent implementation across other components.

Let's verify the transaction state handling implementation:

✅ Verification successful

Based on the shell script results, I can now generate the final response:

Transaction state handling is consistently implemented across the codebase

The transaction state implementation shows a well-structured and consistent pattern:

• LocalTransactionState enum is properly defined with serialization/deserialization
• Transaction state is correctly used in producer implementations for commit/rollback handling
• End transaction hooks provide proper extension points
• Example code demonstrates correct usage patterns

The only minor concern is the unimplemented end_transaction method in EndTransactionTraceHookImpl, but this appears to be a planned extension point rather than a critical issue.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for consistent transaction state handling across the codebase

# Check for LocalTransactionState usage
echo "Checking LocalTransactionState usage patterns:"
rg -A 5 "LocalTransactionState"

# Check for transaction-related implementations
echo "Checking transaction-related implementations:"
ast-grep --pattern 'impl$$$Transaction$$$'

# Check for other transaction context usage
echo "Checking EndTransactionContext usage:"
rg -A 5 "EndTransactionContext"

Length of output: 19939

rocketmq-client/src/hook/send_message_context.rs (1)

42-42: LGTM! Thread-safe producer field type.

The change to Option<ArcRefCellWrapper<DefaultMQProducerImpl>> is a good improvement as it provides:

• Thread-safe sharing through Arc
• Interior mutability through RefCell
• Consistent with the codebase's concurrency patterns

rocketmq-client/Cargo.toml (2)

84-85: LGTM! Improved formatting with newline.

The added newline improves readability and follows Rust's formatting conventions.

---

86-88: Verify the transaction example directory structure.

The new transaction producer example follows the established pattern of organizing examples by feature. Let's verify the directory structure exists.

✅ Verification successful

Directory structure verified and follows the established pattern

The transaction example follows the established pattern in the codebase:

• Located at the correct path: rocketmq-client/examples/transaction/transaction_producer.rs
• Follows the same directory structure as other examples like:
  • rocketmq-client/examples/batch/
  • rocketmq-client/examples/broadcast/
  • rocketmq-client/examples/ordermessage/
  • rocketmq-client/examples/quickstart/

The example's location and structure are consistent with the project's conventions.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the transaction example directory structure and file

# Check if the example directory and file exist
fd --type d "transaction$" "examples/"
fd --type f "transaction_producer.rs$" "examples/"

# Verify the example follows the same structure as other examples
fd --type f "_producer.rs$" "examples/" --exec echo "Found producer example: {}"

Length of output: 461

---

Script:

#!/bin/bash
# Let's first check if the examples directory exists and its location
fd -t d "examples"

# Then check for any transaction-related files in the repository
fd -t f "transaction.*\.rs$"

# List all Rust files to understand the example structure
fd -t f "\.rs$"

Length of output: 31904

rocketmq-remoting/src/protocol/header.rs (1)

23-23: LGTM! Verify the new module implementation.

The new module declaration is correctly placed and follows the established naming pattern.

Let's verify that the module file exists and contains the expected transaction-related header implementation:

✅ Verification successful

The new module is properly implemented and integrated

The verification confirms:

• The module file exists at the correct location
• The EndTransactionRequestHeader struct is properly implemented with all necessary fields and methods
• The module is correctly integrated and used in the producer implementation for transaction message handling
• The implementation follows the codebase's patterns by implementing required traits (CommandCustomHeader, FromMap)

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the existence and implementation of the end_transaction_request_header module

# Test 1: Check if the module file exists
fd "end_transaction_request_header.rs" --type f

# Test 2: Verify the implementation includes transaction-related structures
rg -A 5 "EndTransactionRequestHeader" 

Length of output: 10953

rocketmq-client/src/producer/local_transaction_state.rs (3)

18-18: LGTM!

The import of Display trait is correctly added.

---

Line range hint 24-30: LGTM!

The enum definition follows Rust best practices with appropriate derive macros and a sensible default variant.

---

81-89: ⚠️ Potential issue

Consider standardizing the "UNKNOWN" spelling across the codebase.

The current implementation uses "UNKNOW" in the Display implementation, while the Deserialize implementation accepts both "UNKNOW" and "UNKNOWN". This inconsistency could lead to confusion:

1. "UNKNOW" appears to be a typo of "UNKNOWN"
2. The deserialize implementation suggests "UNKNOWN" is also valid
3. The comment "java is UNKNOW" indicates this might be for compatibility

Consider either:

1. Standardizing on "UNKNOWN" throughout the codebase:

-            LocalTransactionState::Unknown => write!(f, "UNKNOW"),
+            LocalTransactionState::Unknown => write!(f, "UNKNOWN"),

2. Or documenting the reason for maintaining "UNKNOW" if it's required for Java compatibility.

Let's check if "UNKNOW" is used consistently across the codebase:

✅ Verification successful

Let me gather more context about the Java compatibility aspect since there's a comment suggesting this might be intentional.

---

Based on the gathered evidence, I can now provide the final response:

Document the Java compatibility requirement for "UNKNOW" spelling

The "UNKNOW" spelling appears to be intentionally maintained for Java compatibility, as indicated by the comment "//java is UNKNOW" in the enum definition. The current implementation correctly handles both spellings in deserialization while maintaining the Java-compatible "UNKNOW" in serialization.

Recommended actions:

• Add a more detailed documentation comment explaining the Java compatibility requirement:

/// Represents the state of a local transaction.
/// Note: The `Unknown` variant serializes to "UNKNOW" (without 'N') 
/// to maintain compatibility with the Java implementation of RocketMQ.
pub enum LocalTransactionState {

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for both spellings to understand the convention
echo "Checking for 'UNKNOW' usage:"
rg "UNKNOW" --type rust

echo -e "\nChecking for 'UNKNOWN' usage:"
rg "UNKNOWN" --type rust

Length of output: 2943

---

Script:

#!/bin/bash
# Check for any Java-related compatibility code or comments
rg -B 2 -A 2 "java" --type rust

# Also check the specific enum implementation more thoroughly
ast-grep --pattern 'enum LocalTransactionState {
  $$$
}'

Length of output: 3174

rocketmq-common/src/common/message/message_decoder.rs (1)

18-18: LGTM! Import changes are well-organized.

The new imports are properly organized and necessary for the message ID decoding functionality.

Also applies to: 34-34, 39-39

rocketmq-client/src/producer/mq_producer.rs (1)

431-437: LGTM! The signature changes improve flexibility and safety.

The updated method signature introduces several improvements:

• Generic type parameter allows passing any thread-safe type as transaction argument
• Taking ownership of the message is more idiomatic in Rust
• Mutability requirement ensures thread-safety

Let's verify that all implementations have been updated to match the new signature:

✅ Verification successful

All implementations correctly match the new signature

The search results show that all implementations of send_message_in_transaction have been properly updated to match the new signature:

• transaction_mq_producer.rs: Implements with the new generic signature
• default_mq_producer.rs: Implements with the new signature but explicitly unimplements the functionality
• default_mq_producer_impl.rs: Internal implementation matches the new signature

The changes are consistent across the codebase and all implementations properly handle the breaking changes introduced in the trait.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Search for implementations of send_message_in_transaction
ast-grep --pattern 'impl $_ for $_ {
  $$$
  async fn send_message_in_transaction$_($_, $_, $_) {
    $$$
  }
  $$$
}'

Length of output: 120

---

Script:

#!/bin/bash
# Let's try a broader search for send_message_in_transaction implementations
rg "send_message_in_transaction" -A 5 -B 2

Length of output: 3988

rocketmq-client/src/producer/default_mq_producer.rs (2)

351-356: LGTM: Thread-safe producer implementation handling.

The implementation correctly manages thread-safe sharing of the producer implementation using ArcRefCellWrapper.

---

1005-1013: ⚠️ Potential issue

Implementation missing for transaction message support.

The PR aims to add transaction message support, but the send_message_in_transaction method is marked as unimplemented. This will cause runtime panics when called. Please implement the transaction message handling logic as per the PR objectives.

Let's verify if there are any transaction-related implementations in other files:

rocketmq-client/src/implementation/mq_client_api_impl.rs (1)

49-49: LGTM!

The import statement for EndTransactionRequestHeader is correctly placed and follows the existing import pattern.

rocketmq-client/src/factory/mq_client_instance.rs (3)

69-69: LGTM: Improved type safety and mutability handling.

The changes to field types enhance the implementation by:

1. Using ArcRefCellWrapper for client_config enables thread-safe interior mutability
2. Replacing boxed trait objects with concrete MQProducerInnerImpl improves type safety and performance

Also applies to: 76-76

---

Line range hint 329-338: LGTM: Thread-safe producer registration.

The implementation correctly handles producer registration with proper thread safety using RwLock and appropriate error handling.

---

1058-1061: LGTM: Clean producer selection implementation.

The new select_producer method provides thread-safe access to producers with proper ownership handling through cloning.

rocketmq-client/src/producer/producer_impl/mq_producer_inner.rs (2)

67-72: ⚠️ Potential issue

Avoid using unreachable!() macro in production code.

In the get_check_listener method, using unreachable!() may lead to runtime panics if default_mqproducer_impl_inner is None. This could cause the application to crash unexpectedly.

Consider handling the None case gracefully or ensuring that default_mqproducer_impl_inner cannot be None:

pub fn get_check_listener(&self) -> Arc<Box<dyn TransactionListener>> {
    if let Some(default_mqproducer_impl_inner) = &self.default_mqproducer_impl_inner {
        return default_mqproducer_impl_inner.get_check_listener();
    }
-   unreachable!("default_mqproducer_impl_inner is None")
+   panic!("default_mqproducer_impl_inner should not be None");
}

Alternatively, remove the Option wrapper as suggested earlier.

Likely invalid or redundant comment.

---

85-89: Ensure mutable access is properly handled.

The method update_topic_publish_info takes &mut self, but the borrowing of default_mqproducer_impl_inner should ensure mutable access correctly. Verify that there are no data races or borrowing issues.

Run the following script to check for any borrowing conflicts:

✅ Verification successful

Let me gather more information about the implementation and usage of TopicPublishInfo to ensure thread safety and proper mutation.

---

Let me analyze the mutable access pattern by checking the implementation of TopicPublishInfo and its usage.

---

Based on the code analysis, I can now provide the final response:

The mutable access is properly handled and safe.

The TopicPublishInfo struct is designed to be thread-safe through:

1. #[derive(Clone)] implementation allowing safe copying
2. Storage in an Arc<RwLock<HashMap>> in the producer implementation, providing synchronized access
3. Proper mutable access through RwLock when updating via update_topic_publish_info

The implementation follows Rust's ownership and borrowing rules correctly, with synchronized access patterns preventing data races.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for mutable borrowing issues in update_topic_publish_info method.

# Expect: No error messages about borrowing issues.
rg 'update_topic_publish_info' -A 5

Length of output: 2754

---

Script:

#!/bin/bash
# Check TopicPublishInfo implementation and usage
ast-grep --pattern 'struct TopicPublishInfo {
  $$$
}'

# Check for any concurrent access patterns
rg "topic_publish_info" -B 2 -A 2

# Check for any Arc/Mutex usage with TopicPublishInfo
rg "Arc|Mutex.*TopicPublishInfo" -B 1 -A 1

Length of output: 383290

---

Script:

#!/bin/bash
# Check TopicPublishInfo implementation and usage
ast-grep --pattern 'struct TopicPublishInfo {
  $$$
}'

# Check for any concurrent access patterns in TopicPublishInfo
rg "TopicPublishInfo" -A 5 -B 2 rocketmq-client/src/producer/producer_impl/topic_publish_info.rs

Length of output: 696

rocketmq-client/src/implementation/client_remoting_processor.rs (1)

213-271: check_transaction_state method implementation looks correct

The check_transaction_state method is implemented properly, with appropriate logic for handling transaction state checks.

rocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rs (3)

1861-1906: Handle possible None values for transaction IDs

When retrieving and setting the transaction ID from message properties, ensure that transaction_id is available to prevent potential issues.

Confirm that transaction_id is always present in message properties or handle the None case appropriately.

---

2078-2081: Handle potential None values when retrieving unique message ID

When retrieving unique_key from message properties, if it is None, you fall back to msg.msg_id.clone(). Ensure that msg.msg_id is always set or handle the case where both values could be None to prevent issues.

Add checks or defaults to handle cases where both unique_key and msg.msg_id might be missing.

---

1973-2002: 🛠️ Refactor suggestion

Ensure end_transaction_hook_list is properly synchronized

The end_transaction_hook_list may be accessed concurrently without synchronization. Consider wrapping it with a thread-safe structure like Arc<Mutex<...>> to prevent data races.

Check if synchronization is necessary and implement appropriate thread safety mechanisms.