CSE564 Lecture 26

Software Design
Final Review
(202211)

Transcript

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   CSE 564
   Software Design
   Lecture 25: Final Review
   Dr. Javier Gonzalez-Sanchez
   javiergs@asu.edu
   javiergs.engineering.asu.edu | javiergs.com
   PERALTA 230U
   Office Hours: By appointment
   

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   Structural Complexity
   Instability, Abstractness, and Distance
   

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   Example
   

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   • Instability = Cout
   (Cin + Cout)
   Stable Abstraction Principle (SAP)
   

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   Distance
   § Distance: how far a package is away from
   the Main Sequence
   § D = A + I – 1
   § Values -1 to 1
   § Absolute Distance |D|
   

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   Example
   ITeamA
   = 6 / 0 + 6 = 1
   ATeamA
   = 0
   DTeamA
   = 0 + 1 – 1 = 0
   IJlabel
   = 0 / 4 + 0 = 0
   AJlabel
   = 0
   DJlabel
   = 0 + 0 – 1 = -1
   |Djlabel
   | = 1
   Pain Zone (just an example!)
   

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   Stable Dependency Principle (SDP)
   § Every dependency between modules should terminate on a module whose
   Instability is less than or equal to the depending
   module's Instability.
   § Every dependency between modules should terminate on a module whose
   Abstractness is greater than or equal to the depending
   module's Abstractness.
   

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   Structural Metrics
   Instability = Cout
   (Cin + Cout)
   D = A + I – 1
   

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   Final Exam Review
   24 lectures
   

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    The following slides shows some examples
    related to some topics
    This is NOT a comprehensive list of topics
    Topics in the exam can be found
    Weeks 2 to 16
    (Lectures 1 to 24)
    

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    Object Oriented Relationships
    Association Directed
    Association
    Reflexive
    Association
    Multiplicity
    Aggregation Composition Generalization Realization
    

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    Design Principles
    There are five key design principles to consider in Object-Oriented:
    § Single Responsibility Principle (SRP)
    § Open-Closed Principle (OCP)
    § Liskov Substitution Principle (LSP)
    a child should always be better than its parent.
    § Interface Segregation Principle (ISP)
    broke up interfaces
    § Dependency Inversion Principle (DIP)
    do not call us, we will call you
    

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    SRP Example
    

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    OCP Example
    

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    DIP Example
    

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    GoF Patterns
    

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    Strategy
    

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    Composite
    

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    Adapter
    

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    Chain of Responsibility
    

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    Bridge
    

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    Idea 2
    Main
    Factory
    Gift Ball Box Envelop
    Handler
    Supervisor
    Bin
    GUI
    

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    Problem
    

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    Model-View-Controller
    

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    Blackboard
    

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    Client-Server
    Client-Server
    

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    • Instability = Cout
    (Cin + Cout)
    Stable Abstraction Principle (SAP)
    

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    Distance
    § Distance: how far a package is away from
    the Main Sequence
    § D = A + I – 1
    § Values -1 to 1
    § Absolute Distance |D|
    

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    CSE 564 Computer Systems Fundamentals
    Javier Gonzalez-Sanchez
    javiergs@asu.edu
    Fall 2020
    Disclaimer. These slides can only be used as study material for the class CSE564 at ASU. They cannot be distributed or used for another purpose.
    

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