Patroklos Papapetrou @ppapapetrou76 Holding down your technical debt with #itakeunconf #SonarQube
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Patroklos Papapetrou @ppapapetrou76
Holding down your technical debt with
#itakeunconf #SonarQube
Agenda
● Code Quality in a nutshell
● The seven axes of quality
● Technical Debt
● SonarQube Demo Time
private String _ugly_name; private String ANOTHER_$UGLY___NAME; private static String am_i_static;
public void please_work(ArrayList objects){ for (Object object : objects){ if (object == null){ String toString = object.toString(); } else am_i_static = object.toString(); doSomething(object); } } private void doSomething(Object object) throws NullPointerException { throw new NullPointerException(object.toString()); }
What is code quality?
private String _ugly_name; private String ANOTHER_$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?
“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.
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
The seven axes of quality
Design
Duplications
Documentation
Com
plexity
Un
it T
ests
Coding rules
Po
tential B
ug
sTechnical 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)
Technical Debt – My take
“Technical debt for software systems what salt is for cooking. You need it, you can't see it but if you don't control
it it's too late”
Patroklos Papapetrou(Yet another software gardener)
This is how the source code looks like when we
don't pay off technical debt
SonarQube star FeaturesDashboards
SonarQube star FeaturesHistorical Data
SonarQube star FeaturesDifferential Views
SonarQube star FeaturesComponents drilldown views
SonarQube star FeaturesQuality Gates
DEMO TIME
The big pictureTrack and reduce Technical Debt on an
ongoing basis. (Clean up kitchen every day)
The big pictureEngage 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
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