Book Image

Hands-On Design Patterns with Java

By : Dr. Edward Lavieri
2 (1)
Book Image

Hands-On Design Patterns with Java

2 (1)
By: Dr. Edward Lavieri

Overview of this book

Java design patterns are reusable and proven solutions to software design problems. This book covers over 60 battle-tested design patterns used by developers to create functional, reusable, and flexible software. Hands-On Design Patterns with Java starts with an introduction to the Unified Modeling Language (UML), and delves into class and object diagrams with the help of detailed examples. You'll study concepts and approaches to object-oriented programming (OOP) and OOP design patterns to build robust applications. As you advance, you'll explore the categories of GOF design patterns, such as behavioral, creational, and structural, that help you improve code readability and enable large-scale reuse of software. You’ll also discover how to work effectively with microservices and serverless architectures by using cloud design patterns, each of which is thoroughly explained and accompanied by real-world programming solutions. By the end of the book, you’ll be able to speed up your software development process using the right design patterns, and you’ll be comfortable working on scalable and maintainable projects of any size.
Table of Contents (15 chapters)
Free Chapter
1
Section 1: Introducing Design Patterns
4
Section 2: Original Design Patterns
8
Section 3: New Design Patterns

Understanding the bulkhead design pattern

Bulkheads on ships help isolate areas of the ship so that damage such as flooding, fire, or explosion impacts only one section of the ship and is not spread to other sections. Bulkheads also establish the stability of the overall ship. The bulkhead design pattern is based on the ship example. Instead of a ship, we are protecting the system.

Most non-trivial systems will involve multiple components. When those components are implemented in a manner that they are interdependent, systems can fail. As an example, review the system design illustrated next. As you can see, there are several points of failure. If the Server fails, nothing is accessible. Also, if one of the three modules fails, the connected database is inaccessible. These scenarios would make the entire system unusable:

System without the bulkhead design pattern

Now let&apos...