[ISSUE #2392]💫Implement QueueWithTime thread sync safety🚀 #2393
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WalkthroughThe pull request focuses on enhancing thread safety in the Changes
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## main #2393 +/- ##
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- Coverage 28.63% 28.62% -0.01%
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Files 507 507
Lines 73313 73314 +1
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🧹 Nitpick comments (4)
rocketmq-broker/src/processor/processor_service/pop_buffer_merge_service.rs (4)
452-453: Efficiently querying queue size.
Using the lock to query the queue’s length is safe, but be aware that frequent size checks under contention can add overhead. If performance becomes a bottleneck, consider collecting size metrics less frequently.
718-718: Consider a read-write access pattern.
Wrapping theVecDequein aparking_lot::Mutexis solid for mutual exclusion. If reads significantly outnumber writes, aRwLockmay improve concurrency.
738-738: Return value naming.
Methodgetreturns theArc<parking_lot::Mutex<...>>. For clarity, consider naming it more explicitly, e.g.,queue_arc()orqueue_mutex().
971-974: Expand concurrency testing.
The test verifies push operations, which is good. Consider adding a concurrency test to ensure the mutex usage remains correct under simultaneous reads/writes.
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rocketmq-broker/src/processor/processor_service/pop_buffer_merge_service.rs(7 hunks)
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🔇 Additional comments (5)
rocketmq-broker/src/processor/processor_service/pop_buffer_merge_service.rs (5)
210-210: Confirm the lock usage.
Locking the queue before accessing its contents is correct and helps prevent data races. Ensure that methods relying on this lock release it timely to avoid potential contention under heavy load.
552-552: Lazy initialization is valid.
Creating or retrieving the queue in DashMap on demand looks good. Just confirm that concurrent threads won’t repeatedly insert the same key, which could cause unnecessary overhead.
556-557: Appending to the locked queue.
Locking the queue and pushing an item is straightforward and correct. Ensure pop/deduplicate logic (if any) also locks consistently to maintain a thread-safe queue flow.
725-725: Initialization logic looks fine.
Creating a new, emptyVecDequeupon instantiation is correct. No immediate issues detected.
957-958: Basic queue empty check test.
Locking within the test is straightforward, confirming that the queue is empty upon creation. This is a good sanity check for initialization.
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Which Issue(s) This PR Fixes(Closes)
Fixes #2392
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