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.

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Table of Contents (8 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Getting Started with Java EE 8
Getting Started with Java EE 8
Technical requirements
Why is Java EE a good platform for microservices?
What's new in Java EE 8?
Getting started with Java EE 8 microservices
Containerizing Java EE 8 microservices
Summary
2
Building Synchronous Web Services and Clients
Building Synchronous Web Services and Clients
Implementing basic REST APIs with JAX-RS
Using sub-resources
Error handling in JAX-RS
Implementing web service clients with Java EE 8
Testing Java EE 8 web services
Summary
3
Content Marshalling with JSON-B and JSON-P
Content Marshalling with JSON-B and JSON-P
Introduction to content types and content negotiation
Easy data binding using JSON-B
Flexible JSON processing with JSON-P
Implementing hypermedia-driven REST APIs
Summary
4
Building Asynchronous Web Services
Building Asynchronous Web Services
Benefits and usage scenarios of asynchronous processing
Implementing asynchronous web services
Using ManagedExecutorService and server-side callbacks
Implementing asynchronous web service clients
Summary
5
Using Server-Sent Events (SSEs)
Using Server-Sent Events (SSEs)
What are SSEs?
Implementing SSE on the server-side
Implementing SSE REST clients
Implementing and sending SSE broadcasts
Summary
6
Advanced REST APIs
Advanced REST APIs
Applying Design by Contract – adding validation
Using JSON Web Tokens for authentication
Diagnosability – logging, metrics, and tracing
Summary
7
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Building Synchronous Web Services and Clients

In this chapter, we will go into the details of building synchronous microservices with Java EE 8. We will learn how to implement server-side REST APIs using basic JAX-RS annotations, implement sub-resource locators for nested REST APIs, and use HTTP status codes and exception mappers for exception handling. You will also learn how to implement the client side using JAX-RS client APIs, and finally, we will have a look at different test strategies for Java EE web services.

We'll cover the following sections in this chapter:

  • Implementing basic REST APIs with JAX-RS
  • Using sub-resources
  • Error handling in JAX-RS
  • Implementing web service clients with Java EE 8
  • Testing Java EE 8 web services

By the end of this chapter, we'll have implemented a small library microservice that offers a REST API for books, authors, and loans. We...

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