Help my Code Quality is not Manageable

Slides from my talk @CodingSerbia 2014

Transcript

1. Patroklos Papapetrou @ppapapetrou76
   Help! My Code Quality is
   not manageable
   #CodingSerbia #SonarQube
   

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2. Agenda
   ● Code Quality in a nutshell
   ● The seven axes of quality
   ● Technical Debt
   ● SonarQube in Action
   

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3. private String _ugly_name;
   private String ANOTHER_$UGLY___NAME;
   private static String am_i_static;
   public void please_work(ArrayList objects){
   for (Object object : objects){
   if (object == null){
   String toString = object.toString();
   } else
   am_i_static = object.toString();
   doSomething(object);
   }
   }
   private void doSomething(Object object) throws
   NullPointerException {
   throw new
   NullPointerException(object.toString());
   }
   

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4. What is code quality?
   

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5. What is code quality?
   “It’s an indicator about how quickly
   developers can add business value to a
   software system”
   

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6. Why measure?
   Source code is the heart of every system
   

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7. Why measure?
   Developers don't write “new” software. They
   maintain “legacy” systems.
   

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8. Why measure?
   We, the developers are lazy monkeys
   

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9. The broken window theory
   

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10. What we should measure;
    ● Abstract numbers? (Almost) useless
    ● Evolution through time? Definitely!
    ● Metrics? Yes but which ones?
    ● Welcome to the seven axes of quality
    

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11. The seven axes of quality
    

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13. The seven axes of quality
    Design
    Duplications
    Documentation
    Com
    plexity
    Unit Tests
    Coding rules
    Potential Bug
    Technical Debt
    

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14. Technical Debt
    “If the debt grows large enough, eventually the company will
    spend more on servicing its debt than it invests in increasing
    the value of its other assets”
    Steve McConnell
    (Author of code complete)
    

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15. This is how the source
    code looks like when we
    don't pay off technical debt
    

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16. What is SonarQube;
    ●
    Free & open source “Code Quality Platform”
    ●
    Provides moment-in-time quality snapshots
    ●
    Gives trends of lagging and leading indicators
    ●
    Tracks developers’ seven deadly sins and
    Technical Debt
    

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17. How it works?
    

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18. SonarQube star Features
    Dashboards
    

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19. SonarQube star Features
    Historical Data
    

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20. SonarQube star Features
    Differential Views
    

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21. SonarQube star Features
    Components drilldown views
    

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22. SonarQube star Features
    Quality Gates
    

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23. DEMO TIME
    

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24. The big picture
    Track and reduce Technical Debt on an
    ongoing basis. (Clean up kitchen every day)
    

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25. The big picture
    Engage all devs from day #1
    (Not only mums wash the dishes )
    

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26. I have a dream…
    ...that one day code
    quality management
    will be as much as
    important and
    essential is today
    source code
    management
    

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27. Thank you
    ppapapetrou76
    @ppapapetrou76
    http://www.linkedin.com/in/ppapapetrou
    1
    

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