Book Image

Developing Middleware in Java EE 8

Book Image

Developing Middleware in Java EE 8

Overview of this book

Middleware is the infrastructure in software based applications that enables businesses to solve problems, operate more efficiently, and make money. As the use of middleware extends beyond a single application, the importance of having it written by experts increases substantially. This book will help you become an expert in developing middleware for a variety of applications. The book starts off by exploring the latest Java EE 8 APIs with newer features and managing dependencies with CDI 2.0. You will learn to implement object-to-relational mapping using JPA 2.1 and validate data using bean validation. You will also work with different types of EJB to develop business logic, and with design RESTful APIs by utilizing different HTTP methods and activating JAX-RS features in enterprise applications. You will learn to secure your middleware with Java Security 1.0 and implement various authentication techniques, such as OAuth authentication. In the concluding chapters, you will use various test technologies, such as JUnit and Mockito, to test applications, and Docker to deploy your enterprise applications. By the end of the book, you will be proficient in developing robust, effective, and distributed middleware for your business.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

RESTful versus SOAP services


Web services are generally divided into two categories:

  • RESTful services
  • SOAP services

The difference between the two categories may appear confusing at first sight. However, we will try to clarify the differences.

SOAP services

SOAP is a standard communication protocol for exchanging structured messages between computer systems in the XML-based message format. It stands for Simple Object Access Protocol and defines a set of rules associated with messages being sent from one system to another, and a response message is received by this other system. Some key concepts are associated with SOAP services; WSDL (Web Services Description Language) is a standard way of defining a directory of SOAP-based services, message format, and other required information. Some

RESTful services

RESTful (Representational state transfer), on the other hand, is not another protocol for implementing web services. It's considered an architectural pattern for implementing web services. This...