Tracking_Smells_for_Effective_Maintainability_Improvements.pdf

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Tushar Sharma Tracking Smells for Effective Maintainability Improvements

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Tracking Smells for Effective Maintainability Improvements Software Evolution Technical Debt Code Smells

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Tracking Smells for Effective Maintainability Improvements

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Tracking Smells for Effective Maintainability Improvements

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http://www.tusharma.in I am in job market …

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• Continuing Growth • All in-use software systems will grow • Increasing Complexity • As a software system evolves, the complexity increases unless efforts are made to contain the complexity • Declining Quality • The quality of the software will decline unless it is rigorously maintained Lehman’s laws of software evolution

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Evolution of JUnit 3.7 4.0 4.5 4.11

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Which one is easy to work with?

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Courtesy: CMU SEI

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Technical Debt

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Why care about Technical Debt?

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What Technical Debt Constitutes

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What is a smell? …certain structures in the code that suggest (sometimes they scream for) the possibility of refactoring. - Kent Beck 20 Definitions of smells: http://www.tusharma.in/smells/smellDefs.html

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Types of smells • Code smells • Implementation smells • Architecture smells • Design smells • Test smells • Performance smells • Configuration smells • Database smells • Models smells • Usability smells • Web smells • …

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Smells: Types http://www.tusharma.in/smells/

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Granularity of code smells - Implementation - Design - Architecture

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Implementation smells

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Design Smells

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Architecture Smells

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Demo http://www.designite-tools.com

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Designite is a software design quality assessment tool for C#. Key features • Detects 7 architecture smells • Detects 19 design smells • Detects 11 implementation smells • Computes various object-oriented code metrics • Provides smell trend analysis of Git repositories • Many visualization aids including smell treemap, and smell sunburst • Detects code duplication • Allows customization of analysis • Smart tracking of detected smells http://www.designite-tools.com Academic license is free!

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Detection is only the first step towards maintainability improvement.

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Life-cycle of a Smell

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Detecting smells is not enough; track smells for better maintainability!!

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Let’s see it in practice

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Let us conclude

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A Hack

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T E C H N II C A L D E B T Structure in code that suggest the possibility of refactoring I A E

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T E C H N II C A L D E B T A tool to detect smells I A S M E L L S

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T E C H N II C A L D E B T ____ is required for effective maintainability improvements D E S I G N I T E A S M E L L S

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T E C H N II C A L D E B T D E S I G N I T E T R A C K I N G S M E L L S

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Tushar Sharma [email protected] http://www.tusharma.in Thank you!! Courtesy: spikedmath.com