Book Image

Building RESTful Web Services with Java EE 8

By : Mario-Leander Reimer
Book Image

Building RESTful Web Services with Java EE 8

By: Mario-Leander Reimer

Overview of this book

Java Enterprise Edition is one of the leading application programming platforms for enterprise Java development. With Java EE 8 finally released and the first application servers now available, it is time to take a closer look at how to develop modern and lightweight web services with the latest API additions and improvements. Building RESTful Web Services with Java EE 8 is a comprehensive guide that will show you how to develop state-of-the-art RESTful web services with the latest Java EE 8 APIs. You will begin with an overview of Java EE 8 and the latest API additions and improvements. You will then delve into the details of implementing synchronous RESTful web services and clients with JAX-RS. Next up, you will learn about the specifics of data binding and content marshalling using the JSON-B 1.0 and JSON-P 1.1 APIs. This book also guides you in leveraging the power of asynchronous APIs on the server and client side, and you will learn to use server-sent events (SSEs) for push communication. The final section covers advanced web service topics such as validation, JWT security, and diagnosability. By the end of this book, you will have implemented several working web services and have a thorough understanding of the Java EE 8 APIs required for lightweight web service development.
Table of Contents (8 chapters)

Using ManagedExecutorService and server-side callbacks

In this section, we're going to take a look at using a ManagedExecutorService instance for asynchronous request processing. I'm going to show you how to use CompletableFuture to run and resume asynchronous requests. We will talk about using a TimeoutHandler instance for fine-grained timer control, and we'll be using CompletionCallback and ConnectionCallback instances for even further control of the request processing.

Let's get started and switch to code. As usual, we prepare a template project to get started. The first thing we want to do is use a ManagedExecutorService instance. Thus, we will inject this instance into our REST resource:

@Resource
private ManagedEcecutorService executorService;

Then, we want to use this ManagedExecutorService instance to do some heavy processing, such as processing...