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 authentication mechanism


In an enterprise environment, every application or resource needs to validate the user access and guarantee that all users that access these applications or resources will be identified and validated to prevent non-authorized access. When a user requests access to a protected area, they need to be authenticated and then their permissions will be validated by the server. To allow a developer to authenticate and validate users, Java EE 8 has to have an Authentication Mechanism, which is a common solution in Java EE 8 that allows developers to authenticate and validate users in a fast and easy way. The Java EE 8 has five mechanisms to authenticate users:

  • Basic authentication
  • Form-based authentication
  • Digest authentication
  • Client authentication
  • Mutual authentication 

The authentication mechanism works by identifying the roles that define user permissions. Identity is generally defined by logging in with a username and password. This information about a user...