This PR is to add comments to CachedState in fluid/pkg/ddc/alluxio/operations/cached.go#5941
This PR is to add comments to CachedState in fluid/pkg/ddc/alluxio/operations/cached.go#5941YifeiZhang0508 wants to merge 1 commit into
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Code Review
This pull request adds documentation and step-by-step comments to the CachedState function in pkg/ddc/alluxio/operations/cached.go to clarify how the Alluxio cluster's cached capacity is retrieved and parsed. Feedback on these changes suggests improving the robustness of the parsing logic by replacing a redundant len(values) == 0 check with a check for len(values) < 3 to ensure that a capacity value is actually present before attempting to parse it.
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| values := strings.Fields(s) | ||
| if len(values) == 0 { | ||
| return cached, fmt.Errorf("failed to parse %s", s) |
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The check len(values) == 0 is redundant and acts as dead code because the preceding strings.Contains(s, "Used Capacity:") check guarantees that the string s contains non-whitespace characters, meaning strings.Fields(s) will always return at least 2 elements.
To make this check robust and prevent potential out-of-bounds or parsing issues (e.g., if the line is exactly "Used Capacity:" without a value, which would result in values[len(values)-1] being "Capacity:"), we should verify that len(values) is at least 3. This ensures that there is actually a capacity value field to parse.
if len(values) < 3 {
return cached, fmt.Errorf("failed to parse %s", s)
}
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Hi @YifeiZhang0508, the DCO check has failed on this PR. Please ensure each commit has a |
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/ok-to-test |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #5941 +/- ##
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Coverage 63.35% 63.36%
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Files 481 481
Lines 33070 33072 +2
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+ Hits 20953 20955 +2
Misses 10442 10442
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cheyang
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cheyang
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Thanks for adding documentation to the CachedState function, @YifeiZhang0508!
What looks good:
- The function-level doc comment is well-structured and follows Go conventions (describes behavior, documents return values). This is genuinely useful for GoDoc.
Suggestions:
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DCO check is failing -- your commits need a
Signed-off-byline. Please amend your commit(s) withgit commit --amend -s(orgit rebase --signoffif multiple commits) and force-push. -
Consider removing the numbered inline comments (// 1., // 2., // 3., // 4.) -- the function body is short (~20 lines) and the code is self-explanatory. In Go, inline comments that simply restate what the code does tend to add noise rather than clarity. The function doc comment you added already explains the overall logic well. If you want to keep inline comments, drop the numbering and only annotate the non-obvious parts (e.g., the unit conversion step).
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Minor nit: in the doc comment, "for returning" reads slightly awkward. Consider: "...converts the value to bytes." (dropping "for returning").
Blocking: DCO sign-off is required before this can merge.
/cc @fluid-cloudnative/maintainers
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cached.go
Ⅰ. Describe what this PR does
This PR adds comments to the CachedState function in fluid/pkg/ddc/alluxio/operations/cached.go. The comments include a function doc comment describing the purpose, execution flow, and return values, as well as numbered inline comments explaining each logical step within the function body.
Ⅱ. Does this pull request fix one issue?
fixes #5940
Ⅲ.Special notes for reviews
The comment style follows the convention, with a structured doc comment (description + Returns section) and numbered inline comments (e.g., // 1. ..., // 2. ...) for each step in the function.