Creational Abstract Factory Factory Method Behavioral Momento Mediator Structural Decorator Facade Concurrency Patterns Lock Reactor Scheduler

1. JAIN
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DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
METHODOLOGYAND UML
Dr. Vikram Neerugatti
Associate Professor
Department of CSE
4/5/2023 OOAD by Dr. Vikram Neerugatti 1

2. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
• Introduction
• Survey
• Rumbugh Method
• Booch Method
• Jacobson methods
• Patterns
• Frameworks
• Unified approach
• Unified modelling
language
Content
4/5/2023 OOAD by Dr. Vikram Neerugatti 2
• Static and Dynamic
models
• UML diagrams
• UML
• Class diagram
• Use Case diagrams
• Dynamic modelling
• Model organization
• Extensibility

3. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
• Creational
• Abstract Factory
• Factory Method
• Behavioral
• Momento
• Mediator
• Structural
• Decorator
• Facade
Content Cont…
4/5/2023 OOAD by Dr. Vikram Neerugatti 3
• Concurrency
• Patterns
• Lock
• Reactor
• Scheduler

4. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Design patterns – originates – architect – Christopher
alexander – late 1970s.
✓ It identifies the key concepts of a common design
structure – useful for creating reusable object
oriented design.
✓ Provide documentation of the solutions to problems.
Patterns
4/5/2023 OOAD by Dr. Vikram Neerugatti 4

5. JAIN
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DEEMED
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BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ A pattern is a proven solution to a problem in a
context.
✓ Christopher Alexander says each pattern is a three-
part rule which expresses a relation between a
certain context, a problem, and a solution.
✓ Design patterns represent a solutions to problems
that arise when developing software within a
particular context.
✓ i.e Patterns = problems.solution pairs in a context
Patterns
4/5/2023 OOAD by Dr. Vikram Neerugatti 5

6. JAIN
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Started in 1987 by Ward Cunningham and Ken Beck who were
working with Smalltalk and designing GUIs.
✓ Popularized by Gamma, Helm, Johnson and Vlissides (The gang
of four, Go4)
✓ The three of Go4 were working on frameworks (E++,Unidraw,
HotDraw)
✓ Design pattern use a consistent documentation approach
✓ Design pattern are granular and applied at different levels such
as frameworks, subsystems and sub-subsystems
✓ Design patterns are often organized as creational, structural or
behavioral
Patterns - Background
4/5/2023 OOAD by Dr. Vikram Neerugatti 6

7. JAIN
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Patterns, then, represent expert solutions to recurring problems
in a context and thus have been captured at many levels of
abstraction and in numerous domains.
✓ Numerous categories are:
✓ Design
✓ Architectural
✓ Analysis
✓ Creational
✓ Structural
✓ Behavioral
✓ Concurrency
✓ Scope: whether the pattern applies primarily to classes or to
objects
Patterns - Background
4/5/2023 OOAD by Dr. Vikram Neerugatti 7

8. JAIN
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TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Creational
✓ Behavioral
✓ Structural
✓ Concurrency
Design Patterns
4/5/2023 OOAD by Dr. Vikram Neerugatti 8

9. JAIN
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km
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Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ The process of object creation
✓ Abstract Factory - Object
✓ Factory Method - Class
Creational
4/5/2023 OOAD by Dr. Vikram Neerugatti 9

10. JAIN
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UNIVERSITY
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CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Capture how to create families of related product
objects without instantiating classes directly
✓ Object Creational
✓ Motivation:
✓ User interface toolkit supports multiple lookand-feel
standards (Motif, Presentation Manager)
✓ Different appearances and behaviors for UI widgets
✓ Apps should not hard-code its widgets
Creational - Abstract Factory
4/5/2023 OOAD by Dr. Vikram Neerugatti 10

11. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
Creational - Abstract Factory
4/5/2023 OOAD by Dr. Vikram Neerugatti 11

12. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Defines an interface for creating an object ,but let
subclasses decide which class to instantiate.
✓ Factory Method lets a class defer instantiation to
subclasses.
✓ Motivation:
✓ Framework use abstract classes to define and
maintain relationships between objects
✓ Framework has to create objects as well - must
instantiate classes but only knows about abstract
classes - which it cannot instantiate
✓ Factory method encapsulates knowledge of which
subclass to create -moves this knowledge out of the
framework
Creational – Factory Method
4/5/2023 OOAD by Dr. Vikram Neerugatti 12

13. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
Creational – Factory Method
4/5/2023 OOAD by Dr. Vikram Neerugatti 13

14. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Characterize the ways in which classes or objects
interact and distribute Responsibility
✓ Memento - Object
✓ Mediator - Object
Behavioral
4/5/2023 OOAD by Dr. Vikram Neerugatti 14

15. JAIN
–
DEEMED
TO
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Without violating encapsulation, capture and
externalize an object‘s internal state so that object
can be restored to this state later.
✓ Avoid permanent binding between an abstraction
and its implementation
✓ Avoid nested generalizations
✓ Ease adding new implementations
✓ Reduce code repetition
✓ Allow runtime switching of behavior
Behavioral - Memento
4/5/2023 OOAD by Dr. Vikram Neerugatti 15

16. JAIN
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DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
Behavioral - Memento
4/5/2023 OOAD by Dr. Vikram Neerugatti 16

17. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Define an object that encapsulates how a set of
objects interact.
✓ Mediator promotes loose coupling by keeping objects
from referring to each other explicitly, and lets you
vary their interaction independently.
✓ Classes interact only with a mediator class rather
than with each other.
✓ Classes are coupled only to the mediator where
interaction control code resides.
✓ Mediator is like a multi-way Façade pattern.
✓ Analogy: a meeting scheduler
Behavioral - Mediator
4/5/2023 OOAD by Dr. Vikram Neerugatti 17

18. JAIN
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DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
Behavioral - Mediator
4/5/2023 OOAD by Dr. Vikram Neerugatti 18

19. JAIN
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DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Structural design patterns are those that simplify the
design of large object structures by identifying
relationships between them.
✓ They describe common ways of composing classes
and objects so that they become repeatable as
solutions
✓ The composition of classes or objects
✓ Decorator - Object
✓ Façade - Object
Structural
4/5/2023 OOAD by Dr. Vikram Neerugatti 19

20. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ The composition of classes or objects
✓ Decorator - Object
✓ Façade - Object
Structural
4/5/2023 OOAD by Dr. Vikram Neerugatti 20

21. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Attach additional responsibilities to an object
dynamically keeping the same interface.
✓ Decorators provide a flexible alternative to
subclassing for extending functionality.
Structural - Decorator
4/5/2023 OOAD by Dr. Vikram Neerugatti 21

22. JAIN
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DEEMED
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Provide a unified interface to a set of interfaces in a
subsystem.
✓ Facade defines a higher-level interface that makes the
subsystem easier to use.
Structural - Facade
4/5/2023 OOAD by Dr. Vikram Neerugatti 22

23. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ concurrency patterns are those types of design
patterns that deal with the multi-threaded
programming paradigm.
Concurrency Patterns
4/5/2023 OOAD by Dr. Vikram Neerugatti 23

24. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Lock
✓ Reactor
✓ Scheduler
Concurrency Patterns
4/5/2023 OOAD by Dr. Vikram Neerugatti 24

25. JAIN
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DEEMED
TO
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ One thread puts a "lock" on a resource, preventing
other threads from accessing or modifying it.
Concurrency Patterns - Lock
4/5/2023 OOAD by Dr. Vikram Neerugatti 25

26. JAIN
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DEEMED
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ A reactor object provides an asynchronous interface
to resources that must be handled synchronously.
Concurrency Patterns - Reactor
4/5/2023 OOAD by Dr. Vikram Neerugatti 26

27. JAIN
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DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
✓ Explicitly control when threads may execute single-
threaded code.
Concurrency Patterns - Scheduler
4/5/2023 OOAD by Dr. Vikram Neerugatti 27

28. JAIN
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UNIVERSITY
GLOBAL
CAMPUS:
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km
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
Documentation
4/5/2023 OOAD by Dr. Vikram Neerugatti 28

29. JAIN
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DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
• Creational
• Abstract Factory
• Factory Method
• Behavioral
• Momento
• Mediator
• Structural
• Decorator
• Facade
Summary Cont…
4/5/2023 OOAD by Dr. Vikram Neerugatti 29
• Concurrency
• Patterns
• Lock
• Reactor
• Scheduler

30. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
4/5/2023 OOAD by Dr. Vikram Neerugatti 30

31. JAIN
–
DEEMED
TO
BE
UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
-
209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
4/5/2023 OOAD by Dr. Vikram Neerugatti 31
Any Questions/Clarifications/Doubts

32. JAIN
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UNIVERSITY
GLOBAL
CAMPUS:
45th
km
NH
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209
Jakkasandra
Post,
Kanakapura
Rd,
Bengaluru,
Karnataka
562112
Department of CSE
4/5/2023 OOAD by Dr. Vikram Neerugatti 32
Thank you all