achieving low coupling by refactoring towards higher cohesion
TRANSCRIPT
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Achieving Low Coupling by
Refactoring Towards
Higher Cohesion
Florin Coros
www.rabs.ro | www.iquarc.com
@florincoros
blog.iquarc.com/florin
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About me
Co-Founder
Software Architect@florincoros
Founder & Partner
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Low Coupling is GOOD
Loosely coupled systems are
more maintainable
Loose coupled code is easier to
change
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Separation of Concerns is what we NEED
SoC, our single chance to manage
complexity of software
Easier to address one concern at
the time, in isolation
The end goal of Design Pattern and Principles
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High Cohesion and Loose Coupling go hand in hand
A class has high cohesion, when
most of its fields are used by most of its
functions
High cohesive classes are
loosely coupled
Loosely coupled classes have high
cohesion
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From Practices to Code
High cohesive classes are
loosely coupled
Loose coupled code is easier
to change
The end goal of Design Pattern and Principles
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Do we get to a code design which is Loosely
Coupled and has a good Separation of Concerns
from the start?
Most probably NO
How we get to good code design?
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• Small Steps
• Follow a Recipe
• Mechanized
Refactor
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Dependencies
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Refactoring Recipe: Step 1. Reduce Parameters
Reduce Functions Parameters
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Refactoring Recipe: Step 2. Increase Class Cohesion
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Refactoring Recipe: Step 3. Reduce Class Dependencies
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Refactoring Recipe: Step 3. Reduce Class Dependencies
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Code Demo
www.github.com \ iQuarc \ Code-Design-Training \ LessonsSamples \ Lesson7 \ CohesionCoupling
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Thank You!
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Many thanks to our sponsors & partners!
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PARTNERS
PLATINUM