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Hands-On Design Patterns with Java

You're reading from   Hands-On Design Patterns with Java Learn design patterns that enable the building of large-scale software architectures

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Product type Paperback
Published in Apr 2019
Publisher Packt
ISBN-13 9781789809770
Length 360 pages
Edition 1st Edition
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Author (1):
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Dr. Edward Lavieri Jr. Dr. Edward Lavieri Jr.
Author Profile Icon Dr. Edward Lavieri Jr.
Dr. Edward Lavieri Jr.
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Table of Contents (15) Chapters Close

Preface 1. Section 1: Introducing Design Patterns FREE CHAPTER
2. Unified Modeling Language Primer 3. Object-Oriented Design Patterns 4. Section 2: Original Design Patterns
5. Behavioral Design Patterns 6. Creational Design Patterns 7. Structural Design Patterns 8. Section 3: New Design Patterns
9. Architectural Patterns - Part I 10. Architectural Patterns - Part II 11. Functional Design Patterns 12. Reactive Design Patterns 13. Assessments 14. Other Books You May Enjoy

Understanding the stateless design pattern

When we implement the stateless design pattern, we create classes and objects that do not retain state changes. In this approach, each use of the object, as an example, uses the object in its organic form. In our context, state refers to the values of the object's variables. So, there is no definitive list of states. The state of an object is specific to a moment in time.

Implementing the stateless design pattern is appropriate for the following cases:

  • When we want to clone services
  • When the current state of an object dictates that object's behavior
  • When object behavior is a runtime decision and that behavior is state-dependent
  • When you want to process the state of an object as if it were an object

In the next section, we will review the UML class diagram for an implementation of the stateless reactive design pattern.

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