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 concept of performance and scalability patterns


In a business environment, processes and tasks need to be completed quickly in order to generate responses and solutions. With this in mind, the application also needs to be more performative and scaleable. Performance refers to how quickly an application responds to requests, and scalability refers to the application's capacity to respond to an increase in requests without affecting its performance or capacity. In other words, performance is more about the time it takes to serve a request, whereas scalability is about the system being able to upgrade and downgrade resources where needed.

In a business environment, problems with regard to performance are generally problems surrounding read data or external resources (such as file systems or other applications in a network). Performance problems generated by incorrect logic or algorithms are rarer because business environments generally have logic without a hard code, or codes...