jgs CSE 564 Software Design Lecture 22: Software Architecture Dr. Javier Gonzalez-Sanchez [email protected] javiergs.engineering.asu.edu | javiergs.com PERALTA 230U Office Hours: By appointment 

jgs Previously … GoF Patterns 

jgs 564 00010100 GUI Box Name1 Name2 class Name1 { } class Name2 { method(){ Name1 Cat } } class Cat extends Name1 { Car } class Car { } Cat 7. Allow Drag and Drop Car 

jgs 564 00010100 § UML Class Diagram § Model-View-Controller § Observer § Singleton (Blackboard) § Decorator § Other: chain of responsibilities, strategy, bridge, § Source Code § JavaDoc (Classes and Methods) 

jgs 564 00010100 Questions 

jgs 564 00010100 It is This Time of the Semester When … 

jgs 564 00010100 It is This Time of the Semester When … § Do NOT be a Grade Grubber § Grading is done by applying the same policies to all students as it is described in the syllabus. § It is unethical to bring to your instructor's attention the possible impact of your course grade on your plans, including graduation, scholarships, jobs, etc. Do not send requests to your instructor asking for a grade you did not earn with your work. 

jgs Next Step Software Architecture 

jgs 564 00010100 Timeline 1989 Beck OO Thinking Architecture 1993 Gamma et al. GoF Patterns 1994 Garlan 

jgs 564 00010100 Definition § Software design It is responsible for the code level design: what each class is doing, its relationships, and scope. § Software architecture It is responsible for the skeleton and the high-level organization of a software. It identifies the main structural modules (or components) in a system and the relationships between them. 

jgs 564 00010100 Architecture Goals § Define separate branches for each major function § Coordinate communication between modules § Limit propagation of side effects § Facilitate extensibility, modifiability and reuse 

jgs 564 00010100 Architectural Patterns 1. Model-View-Controller (MVC) 2. Layered Architecture 3. Repository Architecture (Blackboard) 4. Client-Server architecture 

jgs Architecture Patterns Model-View-Controller 

jgs 564 00010100 Model-View-Controller 

jgs 564 00010100 Implementation :: View 

jgs 564 00010100 Implementation :: Controller 

jgs Architecture Patterns Blackboard 

jgs 564 00010100 Blackboard 

jgs 564 00010100 Drafting an Implementation 

jgs 564 00010100 What about Blackboard § Singleton (yes or not)? § Create Blackboard in main method (yes or not)? § Connection between Blackboard and Professor (association, aggregation, composition, realization, generalization) ? § Connection between Blackboard and Student (association, aggregation, composition, realization, generalization) ? § Connection between Blackboard and Classroom (association, aggregation, composition, realization, generalization) ? 

jgs 564 00010100 Implementation :: Classroom 

jgs 564 00010100 Implementation :: Professor 

jgs 564 00010100 Implementation :: Student 

jgs 564 00010100 Implementation :: Blackboard 

jgs 564 00010100 Drafting an Implementation 

jgs 564 00010100 Let’s Work 

jgs To be continued … 

jgs CSE 564 Software Design Javier Gonzalez-Sanchez, Ph.D. [email protected] Fall 2021 Copyright. These slides can only be used as study material for the class CSE564 at ASU. They cannot be distributed or used for another purpose.