Book Image

Java EE 8 Design Patterns and Best Practices

By : Rhuan Rocha, Joao Carlos Purificação
Book Image

Java EE 8 Design Patterns and Best Practices

By: Rhuan Rocha, Joao Carlos Purificação

Overview of this book

Patterns are essential design tools for Java developers. Java EE Design Patterns and Best Practices helps developers attain better code quality and progress to higher levels of architectural creativity by examining the purpose of each available pattern and demonstrating its implementation with various code examples. This book will take you through a number of patterns and their Java EE-specific implementations. In the beginning, you will learn the foundation for, and importance of, design patterns in Java EE, and then will move on to implement various patterns on the presentation tier, business tier, and integration tier. Further, you will explore the patterns involved in Aspect-Oriented Programming (AOP) and take a closer look at reactive patterns. Moving on, you will be introduced to modern architectural patterns involved in composing microservices and cloud-native applications. You will get acquainted with security patterns and operational patterns involved in scaling and monitoring, along with some patterns involved in deployment. By the end of the book, you will be able to efficiently address common problems faced when developing applications and will be comfortable working on scalable and maintainable projects of any size.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
5
Aspect-Oriented Programming and Design Patterns
Index

Explaining the cloud design patterns


Now that the cloud application concepts and its challenges are defined, let's get straight to the point and talk about the design patterns used for the implementation of a cloud architecture:

  • Composite application (microservices)
  • Abstraction
  • Twelve-factor
  • API Gateway
  • Service registry
  • Config server
  • Circuit breaker

Composite application (microservices)

In Chapter 7Microservice Patterns, we demonstrated the advantages (and disadvantages) of decomposing an application into functions and taking several benefits from this pattern, always aiming at the application business. In that chapter, it was established that a microservice-based architecture is characterized by decomposing the application into small, functional, independent components with a well-defined communication interface that is loosely-coupled.

Abstraction

This pattern states that the focus must be on what the client needs and not on the existing hardware structure. In this sense, the computational resources...