[ISSUE #2207]🚸Add Default trait for SelectMappedBufferResult🍻 #2208
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🧹 Nitpick comments (1)
rocketmq-store/src/base/select_result.rs (1)
38-47: Consider documenting panic conditions in methods using this default state.Methods like
get_buffer()andget_buffer_slice_mut()will panic when called on a default instance due tounwrap()onNone. This should be documented to help users avoid runtime panics.Add documentation like this:
/// Returns the buffer. /// # Panics /// Panics if called on a default instance or when mapped_file is None. pub fn get_buffer(&self) -> &[u8] {
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rocketmq-store/src/base/select_result.rs(1 hunks)
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🔇 Additional comments (2)
rocketmq-store/src/base/select_result.rs (2)
38-47: LGTM! Default implementation follows Rust conventions.The implementation provides sensible default values for an empty/uninitialized state.
44-44: Verify ifis_in_cache = trueis the correct default.Setting
is_in_cache = truefor a default instance that has no actual mapped file seems counterintuitive. Should it befalseto indicate no data is cached?Let's check how this field is used elsewhere in the codebase:
✅ Verification successful
Default value
is_in_cache = trueis correctThe default value is appropriate because:
- Fresh/default instances represent active data that shouldn't trigger cold data flow control
- The actual cache state is explicitly checked via
cold_data_check_servicewhen needed- Setting it to
falsewould incorrectly trigger cold data handling for new instances🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Search for usages of is_in_cache to understand its semantics rg "is_in_cache" --type rustLength of output: 653
Script:
#!/bin/bash # Get context around cold_data_check_service usage rg "cold_data_check_service" -B 2 -A 2 --type rust # Get context around default_message_store usage of is_in_cache rg "is_in_cache" -B 5 -A 5 --type rust rocketmq-store/src/message_store/default_message_store.rsLength of output: 2956
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #2208 +/- ##
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- Coverage 28.74% 28.73% -0.01%
==========================================
Files 498 498
Lines 71077 71099 +22
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Hits 20430 20430
- Misses 50647 50669 +22 ☔ View full report in Codecov by Sentry. |
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Which Issue(s) This PR Fixes(Closes)
Fixes #2207
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