[ISSUE #966]🚀Support client consumer message-3🚀 #968
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WalkthroughThis pull request introduces significant enhancements to the RocketMQ client, focusing on the consumer module. Key changes include the implementation of a new concurrent message listener, improved error handling with updated error types, and the introduction of a rebalance strategy module. Additionally, the consumer configuration has been modified for better management, and several methods have been updated to support synchronous operations instead of asynchronous ones. Overall, these changes aim to improve the functionality and maintainability of the consumer implementation. Changes
Sequence Diagram(s)sequenceDiagram
participant Consumer
participant MessageQueue
participant Listener
Consumer->>MessageQueue: Subscribe to topic
MessageQueue-->>Consumer: Acknowledge subscription
Consumer->>Listener: Register message listener
Listener->>MessageQueue: Fetch messages
MessageQueue-->>Listener: Deliver messages
Listener->>Consumer: Process messages concurrently
Assessment against linked issues
Suggested labelsapproved, auto merge Poem
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Actionable comments posted: 5
Outside diff range, codebase verification and nitpick comments (3)
rocketmq-client/src/error.rs (1)
23-41: Update references to renamed error types.The verification script found occurrences of old error names in the codebase, indicating that not all references have been updated. Please update the following instances to reflect the new error type names:
MQClientError::MQClientExceptioninrocketmq-client/src/consumer/consumer_impl/default_mq_push_consumer_impl.rsMQClientError::RemotingTooMuchRequestExceptioninrocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rsEnsure all references to the renamed error types are updated to maintain consistency and avoid potential runtime errors.
Analysis chain
Approved renaming and addition of error types.
Renaming error variants for consistency and clarity, and adding
IllegalArgumentError, enhances the error handling framework. Ensure that all references to these error types in the codebase are updated to reflect the new names.Run the following script to verify the usage of renamed error types:
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that all references to error types are updated. # Test: Search for old error names. Expect: No occurrences. rg --type rust -A 5 $'MQClientException|RemotingTooMuchRequestException|MQBrokerException|RequestTimeoutException|OffsetNotFoundException|RemotingException'Length of output: 2799
rocketmq-client/src/producer/default_mq_producer.rs (1)
485-485: Incomplete Update: Instances ofMQClientExceptionstill exist.The transition to the new error type
MQClientErris incomplete. Please update the following occurrences ofMQClientExceptionto ensure consistent error handling across the codebase:
rocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rsrocketmq-client/src/consumer/consumer_impl/default_mq_push_consumer_impl.rsAnalysis chain
Approved: Error handling updated to use new error type.
The change from
MQClientExceptiontoMQClientErrin the error handling of thebatchfunction aligns with the PR's objective to enhance error clarity. Ensure that all references to the old error type have been updated across the entire codebase.Run the following script to verify the usage of the new error type:
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all references to the old error type have been updated. # Test: Search for the old error type. Expect: No occurrences. rg --type rust "MQClientException"Length of output: 416
rocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rs (1)
245-245: Incomplete Refactoring: Old error types still present in the codebase.The refactoring to replace old error types with new ones is incomplete. The following occurrences of old error types were found and need to be updated:
MQClientExceptionandRemotingTooMuchRequestExceptioninrocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rsMQClientExceptioninrocketmq-client/src/consumer/consumer_impl/default_mq_push_consumer_impl.rsPlease update these instances to use the new error types
MQClientErr,RequestTimeoutError, andRemotingTooMuchRequestErrorfor consistency.Analysis chain
Approved: Error handling updated to use new error types.
The changes in error handling in the
sync_send_with_message_queue_timeoutfunction align with the PR's objective to enhance error clarity. Ensure that all references to the old error types have been updated across the entire codebase.Run the following script to verify the usage of the new error types:
Also applies to: 256-256, 319-319, 399-399, 415-415, 422-422
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all references to the old error types have been updated. # Test: Search for the old error types. Expect: No occurrences. rg --type rust "MQClientException|RemotingTooMuchRequestException|RequestTimeoutException"Length of output: 624
Review details
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Review profile: CHILL
Files selected for processing (19)
- rocketmq-client/examples/quickstart/consumer.rs (2 hunks)
- rocketmq-client/src/base/validators.rs (11 hunks)
- rocketmq-client/src/consumer.rs (1 hunks)
- rocketmq-client/src/consumer/allocate_message_queue_strategy.rs (1 hunks)
- rocketmq-client/src/consumer/consumer_impl/default_mq_push_consumer_impl.rs (28 hunks)
- rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_impl.rs (4 hunks)
- rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_push_impl.rs (4 hunks)
- rocketmq-client/src/consumer/default_mq_push_consumer.rs (9 hunks)
- rocketmq-client/src/consumer/default_mq_push_consumer_builder.rs (5 hunks)
- rocketmq-client/src/consumer/mq_push_consumer.rs (1 hunks)
- rocketmq-client/src/consumer/rebalance_strategy.rs (1 hunks)
- rocketmq-client/src/consumer/rebalance_strategy/allocate_message_queue_averagely.rs (1 hunks)
- rocketmq-client/src/error.rs (1 hunks)
- rocketmq-client/src/factory/mq_client_instance.rs (2 hunks)
- rocketmq-client/src/implementation/mq_admin_impl.rs (2 hunks)
- rocketmq-client/src/implementation/mq_client_api_impl.rs (5 hunks)
- rocketmq-client/src/producer/default_mq_producer.rs (2 hunks)
- rocketmq-client/src/producer/producer_impl/default_mq_producer_impl.rs (35 hunks)
- rocketmq-client/src/producer/request_future_holder.rs (2 hunks)
Files skipped from review due to trivial changes (4)
- rocketmq-client/src/consumer.rs
- rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_impl.rs
- rocketmq-client/src/implementation/mq_client_api_impl.rs
- rocketmq-client/src/producer/request_future_holder.rs
Additional comments not posted (11)
rocketmq-client/src/consumer/allocate_message_queue_strategy.rs (1)
30-30: Approved change toget_namereturn type.The change to return a
&'static strfromget_nameenhances safety by ensuring the string's lifetime matches the program's. However, verify that all implementations of this trait return a static string.Run the following script to verify the implementations of
get_name:Verification successful
Verified: All Implementations of
get_nameReturn a Static StringThe implementation of the
get_namemethod found inrocketmq-client/src/consumer/rebalance_strategy/allocate_message_queue_averagely.rsreturns a&'static str, which is correct. This confirms that the change to the return type enhances safety by ensuring the string's lifetime matches the program's. No other implementations were found, indicating compliance across the codebase.
rocketmq-client/src/consumer/rebalance_strategy/allocate_message_queue_averagely.rs: Lines 61-63Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that all implementations of `get_name` return a static string. # Test: Search for implementations of `get_name`. Expect: Only static strings returned. ast-grep --lang rust --pattern $'trait AllocateMessageQueueStrategy { $$$ get_name($_) { $$$ } $$$ }'Length of output: 620
Script:
#!/bin/bash # Description: Find all implementations of the `get_name` method in Rust files and check their return types. # Search for implementations of `get_name` in Rust files. ast-grep --lang rust --pattern 'fn get_name(&self) -> &'static str { $$$ }'Length of output: 93
Script:
#!/bin/bash # Description: Find all implementations of the `get_name` method in Rust files and check their return types. # Search for implementations of `get_name` in Rust files. ast-grep --lang rust --pattern $'fn get_name(&self) -> &\'static str { $$$ }'Length of output: 402
rocketmq-client/src/consumer/rebalance_strategy.rs (1)
27-56: Approved implementation ofcheckfunction.The function
checkis well-implemented, usingIllegalArgumentErroreffectively for error handling and efficiently checking membership withHashSet. Ensure that the error messages provided are clear and informative.rocketmq-client/src/consumer/mq_push_consumer.rs (1)
92-92: Verify the rationale and impact of changingsubscribeto synchronous.The method
subscribehas been changed from asynchronous to synchronous. This could have significant implications for the system's performance and responsiveness. It is crucial to verify that this change aligns with the overall system architecture and does not adversely affect the consumer's ability to process messages efficiently.Please provide the rationale behind this change and assess its impact on the system's performance and scalability.
rocketmq-client/src/base/validators.rs (1)
26-26: Approve the standardization of error handling.The replacement of
MQClientExceptionwithMQClientErracross various validation methods helps standardize error handling within the project. This change should maintain or enhance the clarity and utility of error messages provided to the users. It is important to ensure thatMQClientErrincludes all necessary information for effective error resolution and does not omit any critical details that were previously available withMQClientException.Also applies to: 38-38, 42-42, 49-49, 67-67, 77-77, 85-85, 92-92, 104-104, 120-120, 124-124, 134-134, 149-149, 159-159, 170-170, 182-182
rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_push_impl.rs (1)
42-44: Approve the enhancements inRebalancePushImpl.The introduction of
ArcRefCellWrapperandWeakCellWrapperin theRebalancePushImplstruct, along with the modifications to various methods, enhances the management of shared mutable state and references. These changes are likely to improve the flexibility and robustness of the rebalancing functionality. It is important to ensure that these changes are thoroughly tested, especially in concurrent environments, to avoid any potential issues with memory management or thread safety.Also applies to: 48-56, 62-67, 70-70, 74-74, 84-85, 93-94, 97-109, 164-166, 170-170
rocketmq-client/src/consumer/default_mq_push_consumer_builder.rs (1)
36-36: Approved: Addition oftopic_sub_expressionfield and its initialization.The new field
topic_sub_expressioninDefaultMQPushConsumerBuilderis correctly initialized in the constructor. This change supports enhanced subscription management capabilities.Also applies to: 76-76
rocketmq-client/src/consumer/default_mq_push_consumer.rs (2)
59-60: Approved: Addition oftopicandsub_expressionfields and their initialization.The new fields
topicandsub_expressioninConsumerConfigare correctly initialized in the constructor with default empty strings. This change supports enhanced subscription management capabilities.Also applies to: 377-378
585-605: Approved with caution: Refactoredsubscribemethod to use synchronous threading model.The refactoring of the
subscribemethod to use a synchronous threading model simplifies the control flow but introduces complexity in thread management. Ensure thorough testing and monitoring to detect any potential issues with race conditions or deadlocks that could arise from this new model.Consider adding comprehensive tests to verify the new threading model:
#[test] fn test_subscribe_thread_safety() { // Implement test to check for race conditions or deadlocks }rocketmq-client/src/consumer/consumer_impl/default_mq_push_consumer_impl.rs (2)
76-76: Approved: Addition ofclient_instancefield and its initialization.The new field
client_instanceinDefaultMQPushConsumerImplis correctly initialized in the constructor withNone. This change supports enhanced client instance management capabilities.Also applies to: 81-81, 111-111, 124-124
143-149: Approved: Addition ofset_default_mqpush_consumer_implmethod.The method
set_default_mqpush_consumer_implenhances flexibility in dependency management by allowing a weak reference to be set for the consumer implementation. This approach is beneficial for managing the lifecycle of consumer instances and avoiding memory leaks.rocketmq-client/src/factory/mq_client_instance.rs (1)
241-241: Updated Error Handling:The error handling in the
startmethod has been updated to useMQClientErrinstead ofMQClientException. This change is consistent with the PR's objectives to improve error handling clarity.Run the following script to verify the integration of the new error type with other components:
Verification successful
Successful Integration of
MQClientErr:The
MQClientErrerror type has been successfully integrated across the codebase, replacing the previousMQClientException. This change is consistently applied in various modules, ensuring improved error handling clarity.
- Locations:
rocketmq-client/src/error.rs: Definition ofMQClientErr.- Various modules including
producer,consumer,base,implementation, andfactory.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the integration of `MQClientErr` with other components. # Test: Search for the usage of `MQClientErr`. Expect: Consistent usage across the project. rg --type rust -A 5 $'MQClientErr'Length of output: 64180
| pub struct AllocateMessageQueueAveragely; | ||
|
|
||
| impl AllocateMessageQueueStrategy for AllocateMessageQueueAveragely { | ||
| fn allocate( | ||
| &self, | ||
| consumer_group: &str, | ||
| current_cid: &str, | ||
| mq_all: &[MessageQueue], | ||
| cid_all: &[String], | ||
| ) -> Result<Vec<MessageQueue>> { | ||
| let mut result = Vec::new(); | ||
| if !check(consumer_group, current_cid, mq_all, cid_all)? { | ||
| return Ok(result); | ||
| } | ||
|
|
||
| let index = cid_all | ||
| .iter() | ||
| .position(|cid| cid == current_cid) | ||
| .unwrap_or(0); | ||
| let mod_val = mq_all.len() % cid_all.len(); | ||
| let average_size = if mq_all.len() <= cid_all.len() { | ||
| 1 | ||
| } else if mod_val > 0 && index < mod_val { | ||
| mq_all.len() / cid_all.len() + 1 | ||
| } else { | ||
| mq_all.len() / cid_all.len() | ||
| }; | ||
| let start_index = if mod_val > 0 && index < mod_val { | ||
| index * average_size | ||
| } else { | ||
| index * average_size + mod_val | ||
| }; | ||
| let range = average_size.min(mq_all.len() - start_index); | ||
| for i in 0..range { | ||
| result.push(mq_all[start_index + i].clone()); | ||
| } | ||
| Ok(result) | ||
| } | ||
| fn get_name(&self) -> &'static str { | ||
| "AVG" | ||
| } | ||
| } |
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Comprehensive Review of New Rebalance Strategy Implementation
The new file introduces a struct AllocateMessageQueueAveragely and implements the AllocateMessageQueueStrategy trait for it. Here are some observations and suggestions:
-
Correctness and Logic:
- The
allocatefunction correctly checks if the consumer is eligible to receive message queues before proceeding with the allocation logic. - The use of
unwrap_or(0)at line 41 is potentially risky ifcurrent_cidis not found incid_all. Consider handling this case more gracefully to avoid unexpected behavior.
- The
-
Performance:
- The calculation of
index,mod_val, andaverage_sizeis efficient and handles different scenarios of queue sizes and consumer counts.
- The calculation of
-
Error Handling:
- Proper use of
Resultand early returns on error conditions are good practices that are followed here.
- Proper use of
-
Readability and Maintainability:
- The code is generally well-structured and readable. Comments explaining the logic of queue allocation could enhance maintainability, especially for new contributors.
-
Best Practices:
- Implementing
get_nameto return a static string is a good practice for identifying the strategy. However, consider making the strategy name more descriptive than "AVG".
- Implementing
Overall, the implementation is solid, but adding more descriptive comments and handling potential edge cases more robustly would be beneficial.
| pub struct MyMessageListener; | ||
|
|
||
| impl MessageListenerConcurrently for MyMessageListener { | ||
| fn consume_message( | ||
| &self, | ||
| msgs: Vec<MessageExt>, | ||
| _context: ConsumeConcurrentlyContext, | ||
| ) -> Result<ConsumeConcurrentlyStatus> { | ||
| for msg in msgs { | ||
| println!("Receive message: {:?}", msg); | ||
| } | ||
| Ok(()) | ||
| });*/ | ||
| consumer.start().await?; | ||
|
|
||
| Ok(()) | ||
| Ok(ConsumeConcurrentlyStatus::ConsumeSuccess) | ||
| } |
There was a problem hiding this comment.
Review of New Message Listener Implementation
The implementation of MyMessageListener in the example consumer file introduces concurrent message handling capabilities:
-
Correctness and Logic:
- The
consume_messagemethod processes each message and logs its content. This is a simple and effective demonstration of message processing. - The method returns a
ConsumeConcurrentlyStatus::ConsumeSuccesswhich is appropriate for this example.
- The
-
Best Practices:
- Using
println!for logging in examples is acceptable, but for more robust applications, integrating a logging framework would be advisable.
- Using
-
Error Handling:
- The method handles the basic case well. However, adding error handling for potential issues during message processing could make the example more comprehensive.
Overall, the example is well-implemented for demonstration purposes but could benefit from more detailed error handling and the use of a logging framework for more serious applications.
| @@ -83,7 +83,7 @@ impl MQAdminImpl { | |||
| )); | |||
| } | |||
| } | |||
| Err(MQClientException( | |||
| Err(MQClientErr( | |||
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Review of Error Handling Update in MQAdminImpl
The update to use MQClientErr for error handling in the fetch_publish_message_queues method is a significant change:
-
Correctness and Logic:
- The new error type
MQClientErris used consistently to handle errors related to message queue retrieval. This standardizes error handling and improves the clarity of error messages.
- The new error type
-
Best Practices:
- The use of a formatted error message that includes the topic name helps in diagnosing issues more effectively.
-
Potential Improvements:
- Consider adding more specific error codes or categories to
MQClientErrto further enhance error diagnostics and handling.
- Consider adding more specific error codes or categories to
Overall, the change is a positive step towards better error management in the RocketMQ client. Further refinement of the error categorization could enhance its effectiveness.
| pub fn subscribe( | ||
| mut self, | ||
| topic: impl Into<String>, | ||
| sub_expression: impl Into<String>, | ||
| ) -> Self { | ||
| self.topic_sub_expression.0 = Some(topic.into()); | ||
| self.topic_sub_expression.1 = Some(sub_expression.into()); |
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Approved: Refactored subscribe method with enhanced clarity.
The refactoring of the subscribe method to directly assign topic and sub_expression to topic_sub_expression simplifies the subscription setup process. However, consider adding error handling or validation to ensure that neither topic nor sub_expression are empty strings before assignment, which could prevent runtime issues.
Consider adding validation for topic and sub_expression:
if topic.into().is_empty() || sub_expression.into().is_empty() {
return Err("Topic and subscription expression cannot be empty");
}| pub async fn subscribe(&mut self, topic: &str, sub_expression: &str) -> Result<()> { | ||
| let subscription_data = FilterAPI::build_subscription_data(topic, sub_expression); | ||
| if let Err(e) = subscription_data { | ||
| return Err(MQClientError::MQClientErr( | ||
| -1, | ||
| format!("buildSubscriptionData exception, {}", e), | ||
| )); | ||
| } | ||
| let subscription_data = subscription_data.unwrap(); | ||
| self.rebalance_impl | ||
| .put_subscription_data(topic, subscription_data) | ||
| .await; | ||
| if let Some(ref mut client_instance) = self.client_instance { | ||
| client_instance | ||
| .send_heartbeat_to_all_broker_with_lock() | ||
| .await; | ||
| } | ||
| Ok(()) | ||
| } |
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Approved: Addition of subscribe method with encapsulated subscription logic.
The new subscribe method in DefaultMQPushConsumerImpl simplifies the subscription process by encapsulating the logic for building subscription data and sending heartbeats to brokers. Consider adding error handling for the subscription data building process to ensure robustness in case of invalid parameters.
Consider adding error handling for building subscription data:
if let Err(e) = subscription_data {
return Err(MQClientError::MQClientErr(
-1,
format!("Error building subscription data: {}", e),
));
}
Which Issue(s) This PR Fixes(Closes)
Fixes #966
Brief Description
How Did You Test This Change?
Summary by CodeRabbit
New Features
Bug Fixes
Documentation
Refactor
Style