Refactor/implementation smell #1097
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…ft.rhea.client.failover.impl Class:FailoverClosureImpl
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WalkthroughThe recent updates focus on enhancing the modularity and readability of the jraft library. Key improvements include the introduction of new methods to streamline state management and error handling, as well as the optimization of hash calculations. These changes aim to make the codebase more maintainable and understandable, facilitating easier updates and debugging in the future. Changes
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Actionable comments posted: 0
Review Status
Configuration used: CodeRabbit UI
Files selected for processing (3)
- jraft-core/src/main/java/com/alipay/sofa/jraft/core/NodeImpl.java (5 hunks)
- jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/client/failover/impl/FailoverClosureImpl.java (2 hunks)
- jraft-test/src/main/java/com/alipay/sofa/jraft/test/atomic/HashAlgorithm.java (1 hunks)
Files not reviewed due to errors (1)
- NodeImpl.java (no review received)
Additional Context Used
Additional comments not posted (4)
jraft-test/src/main/java/com/alipay/sofa/jraft/test/atomic/HashAlgorithm.java (2)
74-78: The refactoring of the KETAMA_HASH case into separate variables for each byte shift operation before combining them improves the readability of the code. Good job on making the code more understandable.
71-81: > 📝 NOTEThis review was outside the diff hunks, and no overlapping diff hunk was found. Original lines [94-94]
The use of MD5 for hashing is noted. While MD5 is generally considered insecure for cryptographic purposes due to its lack of collision resistance, its usage here is for consistent hashing rather than security. However, it's still advisable to consider more secure alternatives like SHA-512, especially if they don't negatively impact the system's performance or functionality. Would you like to explore this change?
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/client/failover/impl/FailoverClosureImpl.java (2)
60-75: The introduction of new private methods (hasRetriesLeft,isInvalidPeerError,isInvalidEpochError) and the public methodshouldRetryOnErrorsignificantly enhances the readability and maintainability of the retry logic. These methods are well-named and encapsulate specific conditions effectively.
86-86: The modifications to therunmethod, utilizing the newly introduced methods for retry logic, make the code more readable and maintainable. The use of logging statements to warn about retries is also a good practice for monitoring and debugging purposes.
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Actionable comments posted: 1
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Files selected for processing (1)
- jraft-test/src/main/java/com/alipay/sofa/jraft/test/atomic/HashAlgorithm.java (1 hunks)
Additional Context Used
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jraft-test/src/main/java/com/alipay/sofa/jraft/test/atomic/HashAlgorithm.java (1)
74-78: The refactoring of theKETAMA_HASHcalculation into separate variables for each byte shift operation before combining them enhances readability. Ensure the correctness of the logic remains intact after these changes.
| break; | ||
| case KETAMA_HASH: | ||
| byte[] bKey = computeMd5(k); | ||
| rv = (long) (bKey[3] & 0xFF) << 24 | (long) (bKey[2] & 0xFF) << 16 | (long) (bKey[1] & 0xFF) << 8 | ||
| | bKey[0] & 0xFF; | ||
| long fourthByteShifted = (long) (bKey[3] & 0xFF) << 24; | ||
| long thirdByteShifted = (long) (bKey[2] & 0xFF) << 16; | ||
| long secondByteShifted = (long) (bKey[1] & 0xFF) << 8; | ||
| long firstByte = bKey[0] & 0xFF; | ||
| rv = fourthByteShifted | thirdByteShifted | secondByteShifted | firstByte; | ||
| break; | ||
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| } |
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📝 NOTE
This review was outside the diff hunks, and no overlapping diff hunk was found. Original lines [94-94]
The use of MD5 for hashing is noted. Given MD5's known vulnerabilities, consider replacing it with a more secure algorithm like SHA-512, especially in contexts requiring high security. This change may impact existing systems relying on MD5 hashes, so assess the implications carefully.
- md5 = MessageDigest.getInstance("MD5");
+ md5 = MessageDigest.getInstance("SHA-512");
Motivation:
Refactoring the code Implementation Without Breaking its functionality.
Main focus on Implementation code smells.
Tool Used for Code Smell Analysis: DesigniteJava(https://www.designite-tools.com/products-dj)
Modification:
Current Modifications Class Vise:
Result:
1: NodeImpl
o The Cyclomatic complexity of the method is 12. The method is complex to understand as its control flow.
o Extracting different parts of method to new introduced methods will make code more readable.
o The new method names also chosen in a way that it describes the method’s purpose.
2: NodeImpl
o This particular method is decomposed by the before programmer. However its name does not justify its work and why the separate method having similarity with the method it is used in makes it ambiguous and difficult to understand.
3: FailoverClosureImpl
o Simplifying the condition used in method. The conditional expression this.retriesLeft > 0 && (ErrorsHelper.isInvalidPeer(error) || (this.retryOnInvalidEpoch && ErrorsHelper.isInvalidEpoch(error))) is complex and detected by tool as it crosses single condition tokens limit allowed defined in tool.
4: HashAlgorithm
o In this code as this code statement can be basic to understand however introducing a variable names will improve its understandability more and programmer can understand working of one line complex statement.
Future Goal:
Summary by CodeRabbit