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 how microservices architecture works


Although there is still no formal model to follow when implementing microservices architecture, we can highlight some common characteristics. We can also verify good practices when developing microservices.

With one or more related functionalities, a microservice is a small portion of the application that is used to benefit the business. From this definition of microservices, we will now look at each of the following common characteristics of microservices in detail:

  • The application is decomposed into smaller components
  • Multitask teams
  • Product focus
  • Simpler and smarter processing.
  • Decentralized governance of libraries and APIs
  • Single responsibility principle
  • Fault tolerance
  • Evolutionary systems
  • Decentralized data

The application is decomposed into smaller components

While developing an application based on microservices architecture, we should consider breaking the application into smaller components that will be changed and deployed separately (as opposed...