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Help my Code Quality is not Manageable
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Papapetrou Patroklos
October 17, 2014
Programming
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170
Help my Code Quality is not Manageable
Slides from my talk @CodingSerbia 2014
Papapetrou Patroklos
October 17, 2014
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Transcript
Patroklos Papapetrou @ppapapetrou76 Help! My Code Quality is not manageable
#CodingSerbia #SonarQube
Agenda • Code Quality in a nutshell • The seven
axes of quality • Technical Debt • SonarQube in Action
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()); }
What is code quality?
What is code quality? “It’s an indicator about how quickly
developers can add business value to a software system”
Why measure? Source code is the heart of every system
Why measure? Developers don't write “new” software. They maintain “legacy”
systems.
Why measure? We, the developers are lazy monkeys
The broken window theory
What we should measure; • Abstract numbers? (Almost) useless •
Evolution through time? Definitely! • Metrics? Yes but which ones? • Welcome to the seven axes of quality
The seven axes of quality
None
The seven axes of quality Design Duplications Documentation Com plexity
Unit Tests Coding rules Potential Bug Technical Debt
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)
This is how the source code looks like when we
don't pay off technical debt
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
How it works?
SonarQube star Features Dashboards
SonarQube star Features Historical Data
SonarQube star Features Differential Views
SonarQube star Features Components drilldown views
SonarQube star Features Quality Gates
DEMO TIME
The big picture Track and reduce Technical Debt on an
ongoing basis. (Clean up kitchen every day)
The big picture Engage all devs from day #1 (Not
only mums wash the dishes )
I have a dream… ...that one day code quality management
will be as much as important and essential is today source code management
Thank you ppapapetrou76 @ppapapetrou76 http://www.linkedin.com/in/ppapapetrou 1