Dr. Javier Gonzalez-Sanchez
[email protected]
www.javiergs.info
o
ffi
ce: 14 -227
CSC 508/9
Software Engineering (Design & Deployment)
Lecture 05. Software Architecture II
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Environment
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Blueprint
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Architecture
Design
Code
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Model-View-Controller
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Model-View-Controller
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Appendix
Observer Pattern
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Observer
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Classroom | Initial Version
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https://github.com/CSC3100/Patterns
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Student | Initial Version
class Student {
public String answerQuestion (String question) {
String answer;
// solve the question
return answer;
}
}
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https://github.com/CSC3100/Patterns
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Teacher | Initial Version
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https://github.com/CSC3100/Patterns
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Observer
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https://github.com/CSC3100/Patterns
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https://github.com/CSC3100/Patterns
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https://github.com/CSC3100/Patterns
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https://github.com/CSC3100/Patterns
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https://github.com/CSC3100/Patterns
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Important
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Do not reinvent the wheel!
(Do not make another implementation for
classes Observer or Observable -they
already exist in libraries!)
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Important
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Depreciated
java.util.Observer
java.util.Observable
The implementation of these packages
That is NOT about the Observer pattern being
depreciated.
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Important
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Use
java.beans.PropertyChangeListener
java.beans.PropertyChangeSupport
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https://github.com/CSC3100/Patterns
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https://github.com/CSC3100/Patterns
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https://github.com/CSC3100/Patterns
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Thoughts?
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Questions
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CSC 509 Software Engineering
Javier Gonzalez-Sanchez, Ph.D.
[email protected]
Fall 2025
Copyright. These slides can only be used as study material for the class CSC509 at Cal Poly.
They cannot be distributed or used for another purpose.