Abstraction is a communication tool
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Transcript of Abstraction is a communication tool
Who Am I
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• I am Terry Yin• Work for Odd-e• Experienced in software development• Focus on technical coaching• Love programming• A father
Me
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How do you put an elephant into a refrigerator?
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David Wheeler: ”All problems in computer science can be solved by another level of indirection";
Kevlin Henney: "...except for the problem of too
many layers of indirection."
FTSE (The Fundamental Theorem of Software Engineering)
Does Abstraction Solve Problems?
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When there are too many customer tickets
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Create a new role called Customer Tickets Manager
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Do you know the OSI 7-layer model?
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7-layer is too old…
But where is the religious layer?
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Object-Oriented
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Parent
Child
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Model Driven Architecture
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Abstraction in Contract Negotiation
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Communication Tool
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The key is working software
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Ways Of Communication
•Reading code•Documentation•Discussion•Design workshop•Requirement workshop•Product review•Bug reporting•…
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Abstraction In Code
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Information Hiding and Encapsulation
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Sometimes, a little smartness might help the communication, especially when it becomes a convention.
It will become a disaster if over used.
Single Layer Abstraction Principle
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Communication With Code
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Hey! I’m changing the method that conflicts with your changes!
Roger!
... done and committed!
Ok! I’ll update and check the merged changes!
... Looks good!Great!
Documentation
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Can you give me an example?
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Requirement
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Technical Activity
Workflow
RuleClarity
Stability
Specification
Users can understand
AutomationTechnical
Cucumber vs. Robot Framework
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"Being abstract is something profoundly different from being vague … The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise."
Edsger W. Dijkstra
You’ve reached the end
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Thanks!
