[ISSUE #1777]🤡Optimize RebalanceImpl#get_rebalance_result_from_broker method and add doc for method🔥 #1778
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… method and add doc for method🔥
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🧹 Outside diff range and nitpick comments (2)
rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_impl.rs (2)
251-269: Improve documentation for clarity and consistencyThe documentation comments for
get_rebalance_result_from_brokercontain redundant and inconsistent sections. Specifically, theReturnsandErrorssections are duplicated or include unnecessary information. Consider revising the comments to adhere to Rust's documentation conventions for clarity.Apply the following diff to improve the documentation:
/// Retrieves the rebalance result from the broker for a given topic. /// -/// This function queries the broker for message queue assignments for the specified topic. -/// If the assignments are successfully retrieved, it updates the message queue assignments -/// and notifies the sub-rebalance implementation of any changes. +/// Queries the broker for message queue assignments for the specified topic. +/// Updates the message queue assignments and notifies the sub-rebalance implementation if changes are detected. /// /// # Arguments /// -/// * `topic` - A reference to a `CheetahString` representing the topic to query. +/// * `topic` - The topic to query. /// * `is_order` - A boolean indicating whether the message queues should be ordered. +/// +/// # Returns +/// +/// `true` if the rebalance result matches the current working message queue; otherwise, `false`.
307-310: Correct format string in error loggingThe error message includes a period at the end of the format string, which may result in double punctuation when the error
eis displayed. Also, ensure that the format string placeholders match the provided arguments.Apply the following diff to correct the error logging:
error!( - "allocate message queue exception. strategy name: {}, {}.", + "allocate message queue exception. Strategy name: {}, error: {}", strategy_name, e );
rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_impl.rs
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Additional details and impacted files@@ Coverage Diff @@
## main #1778 +/- ##
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- Coverage 28.20% 28.20% -0.01%
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Files 467 467
Lines 64760 64763 +3
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Hits 18265 18265
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (2)
rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_impl.rs (2)
251-269: Enhance method documentation for clarity.While the documentation structure is good, consider these improvements:
- Add a more detailed description of what a "rebalance result" represents in the context of message queue assignments.
- List specific error scenarios in the Errors section, such as allocation strategy being None or query assignment failures.
Apply this diff to enhance the documentation:
/// Retrieves the rebalance result from the broker for a given topic. /// -/// This function queries the broker for message queue assignments for the specified topic. -/// If the assignments are successfully retrieved, it updates the message queue assignments -/// and notifies the sub-rebalance implementation of any changes. +/// This function queries the broker for message queue assignments for load balancing. +/// When assignments are successfully retrieved, it: +/// 1. Updates the local message queue assignments +/// 2. Notifies the sub-rebalance implementation of changes +/// 3. Manages the lifecycle of process queues based on the new assignments /// /// # Arguments /// /// * `topic` - A reference to a `CheetahString` representing the topic to query. /// * `is_order` - A boolean indicating whether the message queues should be ordered. /// /// # Returns /// /// A `bool` indicating whether the rebalance result matches the current working message queue. /// /// # Errors /// -/// This function logs errors if the allocation strategy is not set or if the query assignment -/// fails. +/// This function logs errors in the following scenarios: +/// * Allocation strategy is not configured (returns false) +/// * Query assignment to broker fails (returns false) +/// * Invalid or empty assignment result from broker (returns false)
310-313: Enhance error logging with additional context.Consider adding consumer group information to the error message for better debugging and log parsing.
Apply this diff to improve the error logging:
- error!( - "allocate message queue exception. strategy name: {}, {}.", - strategy_name, e - ); + error!( + target: "rebalance", + consumer_group = %self.consumer_group.as_ref().unwrap(), + strategy = %strategy_name, + error = %e, + "Failed to allocate message queue" + );
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rocketmq-client/src/consumer/consumer_impl/re_balance/rebalance_impl.rs (1)
275-281: LGTM! Error handling improvements implemented.
The changes effectively address the previous review feedback by adding proper error logging when the allocation strategy is not set. The use of match expressions also improves the code's robustness.
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Which Issue(s) This PR Fixes(Closes)
Fixes #1777
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New Features
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