Book Image

Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON

By : Bhakti Mehta, Masoud Kalali
Book Image

Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON

By: Bhakti Mehta, Masoud Kalali

Overview of this book

<p>As the technology landscape moves focus towards smaller devices, the need for building scalable, flexible, lightweight, and real-time communications-based applications grows. HTML 5 and Java EE 7 provide a new synthesis of technologies that demonstrate tremendous scope and potential in areas of device independence, asynchronous communication, interoperability, and portability.<br /><br />Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON is a practical, hands-on guide that provides you with clear and pragmatic information to take advantage of the real power behind HTML5 and Java EE technologies. This book also gives you a good foundation for using them in your applications.<br /><br />Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON looks at the different HTML5-based Java EE 7 API, and takes a deep dive into the individual areas of technologies to cover basic to advanced concepts, and also provides best practices for each API. You will also learn how to build a REST-based Event Notification Application using the Twitter API, tying all the different technologies together that we will cover. You will also take a look at integrating different Java EE APIs to build a Library Application. If you want to take advantage of using the new HTML5 technologies and Java EE 7 platform, then this is the book for you. You will learn everything you need to know to build portable RESTful Web Services with JAX-RS 2.0, Web Sockets, JSON, and Server-Sent Events.</p>
Table of Contents (12 chapters)

The Java WebSocket Client API


Chapter 2, WebSockets and Server-sent Events, covered the Java WebSockets client API. Any POJO can be transformed into a WebSockets client by annotating it with @ClientEndpoint.

Additionally the user can add encoders and decoders attributes to the @ClientEndpoint annotation to encode application objects into WebSockets messages and WebSockets messages into application objects.

The following table shows the @ClientEndpoint annotation and its attributes:

Annotation

Attribute

Description

@ClientEndpoint

 

This class-level annotation signifies that the Java class is a WebSockets client that will connect to a WebSockets server endpoint.

 

value

The value is the URI with a leading /.

 

encoders

Contains a list of Java classes that act as encoders for the endpoint. The classes must implement the encoder interface.

 

decoders

Contains a list of Java classes that act as decoders for the endpoint. The classes must implement the decoder interface.

 

configurator...