[Issue #1294] Rocketmq-client supports the AllocateMessageQueueStrategy algorithm-AllocateMessageQueueByConfig #1651
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WalkthroughThe changes in this pull request introduce a new module for message queue allocation strategies within the RocketMQ client. Specifically, a new module named Changes
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #1651 +/- ##
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+ Coverage 26.22% 26.28% +0.06%
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Files 463 464 +1
Lines 61245 61300 +55
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+ Hits 16061 16113 +52
- Misses 45184 45187 +3 ☔ View full report in Codecov by Sentry. |
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Actionable comments posted: 1
🧹 Outside diff range and nitpick comments (4)
rocketmq-client/src/consumer/rebalance_strategy/allocate_message_queue_by_config.rs (4)
22-31: Add documentation for public APIThe struct and its public constructor should be documented with rustdoc comments explaining their purpose, parameters, and usage examples.
Add documentation like this:
+/// A message queue allocation strategy that uses a predefined list of message queues. +/// +/// This strategy always returns the same predefined list of message queues regardless +/// of the consumer group configuration. pub struct AllocateMessageQueueByConfig { message_queue_list: Vec<MessageQueue>, } impl AllocateMessageQueueByConfig { + /// Creates a new instance with the specified list of message queues. + /// + /// # Arguments + /// * `message_queue_list` - The predefined list of message queues to be allocated #[inline] pub fn new(message_queue_list: Vec<MessageQueue>) -> Self {
50-90: Add more test coverageThe current test only covers the basic happy path. Consider adding tests for:
- Empty message queue list
- Invalid queues not present in mq_all
- Different consumer group configurations
Here's an example test case:
#[test] fn test_allocate_with_empty_queue_list() { let consumer_group = CheetahString::from("test_group"); let current_cid = CheetahString::from("CID_PREFIX1"); let mq_all = create_message_queue_list(4); let cid_all = create_consumer_id_list(2); let strategy = AllocateMessageQueueByConfig::new(vec![]); let result = strategy.allocate(&consumer_group, ¤t_cid, &mq_all, &cid_all); assert!(result.is_ok()); assert!(result.unwrap().is_empty()); }
92-102: Consider moving test helpers to a shared moduleThe helper functions
create_consumer_id_listandcreate_message_queue_listare well-structured and could be useful for other tests. Consider moving them to a shared test utilities module if they're needed elsewhere.
22-48: Consider future extensibilityWhile the current implementation provides basic configuration-based queue allocation, consider these architectural improvements for future versions:
- Add support for dynamic queue list updates
- Implement a builder pattern for more complex configurations
- Add metrics for monitoring queue allocation patterns
This would make the implementation more robust for production use.
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📒 Files selected for processing (2)
rocketmq-client/src/consumer/rebalance_strategy.rs(1 hunks)rocketmq-client/src/consumer/rebalance_strategy/allocate_message_queue_by_config.rs(1 hunks)
🔇 Additional comments (1)
rocketmq-client/src/consumer/rebalance_strategy.rs (1)
19-19: LGTM! Module declaration follows consistent pattern
The new module declaration follows the same pattern as other allocation strategy modules and is appropriately placed in the file structure.
| impl AllocateMessageQueueStrategy for AllocateMessageQueueByConfig { | ||
| fn allocate( | ||
| &self, | ||
| consumer_group: &CheetahString, | ||
| current_cid: &CheetahString, | ||
| mq_all: &[MessageQueue], | ||
| cid_all: &[CheetahString], | ||
| ) -> crate::Result<Vec<MessageQueue>> { | ||
| Ok(self.message_queue_list.clone()) | ||
| } | ||
|
|
||
| #[inline] | ||
| fn get_name(&self) -> &'static str { | ||
| "CONFIG" | ||
| } | ||
| } |
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Verify message queue validity
The allocate method currently returns the predefined queue list without validating if these queues exist in mq_all. This could lead to inconsistencies if the predefined list contains queues that are no longer available.
Consider adding validation:
fn allocate(
&self,
consumer_group: &CheetahString,
current_cid: &CheetahString,
mq_all: &[MessageQueue],
cid_all: &[CheetahString],
) -> crate::Result<Vec<MessageQueue>> {
+ // Verify all configured queues exist in mq_all
+ for queue in &self.message_queue_list {
+ if !mq_all.contains(queue) {
+ return Err(IllegalArgumentError(format!(
+ "Configured queue {:?} not found in available queues",
+ queue
+ )));
+ }
+ }
Ok(self.message_queue_list.clone())
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| impl AllocateMessageQueueStrategy for AllocateMessageQueueByConfig { | |
| fn allocate( | |
| &self, | |
| consumer_group: &CheetahString, | |
| current_cid: &CheetahString, | |
| mq_all: &[MessageQueue], | |
| cid_all: &[CheetahString], | |
| ) -> crate::Result<Vec<MessageQueue>> { | |
| Ok(self.message_queue_list.clone()) | |
| } | |
| #[inline] | |
| fn get_name(&self) -> &'static str { | |
| "CONFIG" | |
| } | |
| } | |
| impl AllocateMessageQueueStrategy for AllocateMessageQueueByConfig { | |
| fn allocate( | |
| &self, | |
| consumer_group: &CheetahString, | |
| current_cid: &CheetahString, | |
| mq_all: &[MessageQueue], | |
| cid_all: &[CheetahString], | |
| ) -> crate::Result<Vec<MessageQueue>> { | |
| // Verify all configured queues exist in mq_all | |
| for queue in &self.message_queue_list { | |
| if !mq_all.contains(queue) { | |
| return Err(IllegalArgumentError(format!( | |
| "Configured queue {:?} not found in available queues", | |
| queue | |
| ))); | |
| } | |
| } | |
| Ok(self.message_queue_list.clone()) | |
| } | |
| #[inline] | |
| fn get_name(&self) -> &'static str { | |
| "CONFIG" | |
| } | |
| } |
Fixes #1294
Summary by CodeRabbit
New Features
Tests