Handle Cancel Restore Statement Fail

[qingxinhome]

User description

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue #16098

What this PR does / why we need it:

handle ctrl+c failed to cancel during restore data

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PR Type

Bug fix

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Description

• Fixed import statements in pkg/frontend/authenticate.go by adding missing imports and removing duplicates.
• Added context cancellation checks in doRestoreSnapshot, restoreToDatabaseOrTable, and restoreSystemDatabase functions in pkg/frontend/snapshot.go.
• Implemented CancelCheck function in pkg/frontend/util.go to check if the context has been canceled.

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Changes walkthrough 📝

	Relevant files
Bug fix	authenticate.go Fix import statements for required packages                            pkg/frontend/authenticate.go Added missing imports for btree, zap, and errgroup. Removed duplicate imports for btree, zap, and errgroup. +5/-3      snapshot.go Add context cancellation checks in restore functions          pkg/frontend/snapshot.go Added CancelCheck function calls to check for context cancellation. +17/-0
Enhancement	util.go Implement CancelCheck function for context cancellation    pkg/frontend/util.go Added CancelCheck function to check if the context has been canceled. +13/-1

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PR Review 🔍

⏱️ Estimated effort to review [1-5]	2, because the changes are straightforward and localized to specific functions, mainly involving import adjustments and context cancellation checks. The logic is not complex, but careful attention is needed to ensure that the new cancellation checks are correctly implemented and that the import changes do not introduce any conflicts or missing dependencies.
🧪 Relevant tests	No
⚡ Possible issues	Possible Bug: The CancelCheck function is introduced to handle context cancellation, but it's crucial to ensure that all necessary cleanup or rollback actions are performed before returning from the functions upon cancellation. This needs careful testing to avoid leaving the system in an inconsistent state.
🔒 Security concerns	No

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PR Code Suggestions ✨

Category	Suggestion	Score
Best practice	Rename the parameter to follow Go naming conventions Rename the parameter Ctx to ctx in the CancelCheck function to follow Go naming conventions for variable names. pkg/frontend/util.go [1351-1357] -func CancelCheck(Ctx context.Context) error { +func CancelCheck(ctx context.Context) error { select { - case <-Ctx.Done(): - return Ctx.Err() + case <-ctx.Done(): + return ctx.Err() default: return nil } } Suggestion importance[1-10]: 10 Why: The suggestion correctly identifies a deviation from Go naming conventions and provides a fix that enhances code readability and consistency.	10
Enhancement	Log the context cancellation event before returning to aid in debugging Instead of returning immediately when the context is canceled, consider logging the cancellation event. This will help in debugging and understanding why the function exited early. pkg/frontend/snapshot.go [420-421] if err = CancelCheck(ctx); err != nil { + getLogger().Info("Context canceled during restore operation", zap.Error(err)) return } Suggestion importance[1-10]: 7 Why: The suggestion to log the context cancellation event is valid and improves debugging. It addresses a real issue in the code where silent returns could obscure the flow of execution during error handling.	7
Maintainability	Refactor to perform context cancellation check at the beginning of the function to avoid repetition Instead of repeating the context cancellation check in multiple places, consider refactoring the code to perform this check in a single place, such as at the beginning of the function. pkg/frontend/snapshot.go [420-421] if err = CancelCheck(ctx); err != nil { + getLogger().Info("Context canceled during restore operation", zap.Error(err)) return } +// existing code continues... Suggestion importance[1-10]: 6 Why: The suggestion to refactor the code for context cancellation checks is good for maintainability. However, it's not clear from the PR if this can be applied universally without affecting the logic in different parts of the function.	6
	Group the new import statements with the existing ones for better organization Group the new import statements with the existing ones to maintain a clean and organized import section. pkg/frontend/authenticate.go [34-36] +"github.com/matrixorigin/matrixone/pkg/catalog" +"github.com/matrixorigin/matrixone/pkg/clusterservice" +"github.com/matrixorigin/matrixone/pkg/common/moerr" "github.com/tidwall/btree" "go.uber.org/zap" "golang.org/x/sync/errgroup" Suggestion importance[1-10]: 5 Why: The suggestion to organize imports is correct and improves code readability. However, it's a minor enhancement as it primarily affects the style rather than the functionality or performance of the code.	5