Book Image

Jakarta EE Application Development - Second Edition

By : David R. Heffelfinger
Book Image

Jakarta EE Application Development - Second Edition

By: David R. Heffelfinger

Overview of this book

Jakarta EE stands as a robust standard with multiple implementations, presenting developers with a versatile toolkit for building enterprise applications. However, despite the advantages of enterprise application development, vendor lock-in remains a concern for many developers, limiting flexibility and interoperability across diverse environments. This Jakarta EE application development guide addresses the challenge of vendor lock-in by offering comprehensive coverage of the major Jakarta EE APIs and goes beyond the basics to help you develop applications deployable on any Jakarta EE compliant runtime. This book introduces you to JSON Processing and JSON Binding and shows you how the Model API and the Streaming API are used to process JSON data. You’ll then explore additional Jakarta EE APIs, such as WebSocket and Messaging, for loosely coupled, asynchronous communication and discover ways to secure applications with the Jakarta EE Security API. Finally, you'll learn about Jakarta RESTful web service development and techniques to develop cloud-ready microservices in Jakarta EE. By the end of this book, you'll have developed the skills to craft secure, scalable, and cloud-native microservices that solve modern enterprise challenges.
Table of Contents (18 chapters)
15
Chapter 15: Putting it All Together

Developing a simple RESTful web service

In this section, we will develop a simple web service to illustrate how we can make methods in our service respond to the different HTTP request methods.

Developing a RESTful web service using Jakarta REST is simple and straightforward. Each of our RESTful web services needs to be invoked via its Unique Resource Identifier (URI). Our RESTful web service URI is specified by the @Path annotation, which we need to use to decorate our RESTful web service resource class.

When developing RESTful web services, we need to develop methods that will be invoked when our web service receives an HTTP request. We need to implement methods to handle one or more of the six types of requests that RESTful web services handle – GET, POST, PUT, DELETE, HEAD and/or PATCH.

Note

We will only cover the most frequently used HTTP request types as implementing all HTTP request types is very similar.

Jakarta REST provides annotations that we can use...