Book Image

Developing RESTful Web Services with Jersey 2.0

By : Sunil Gulabani
Book Image

Developing RESTful Web Services with Jersey 2.0

By: Sunil Gulabani

Overview of this book

<p>JAX-RS 2.0 is an enhanced framework based on RESTful architecture. It provides support for both the client and the server. Jersey 2.0 is the reference implementation of JAX-RS 2.0 (JSR 339 specification). This framework has undergone major revisions. The enhanced framework helps developers to use a low-level and simplified API.</p> <p>This practical, hands-on guide will help you to create RESTful web services easily with individual aspects of the application requests. It will enable you to learn and implement RESTful web services using the new features included in JAX-RS 2.0. It’s a jump start for those who want to try their hand at the new API. It aims to provide practical knowledge of the API along with detailed understanding.</p> <p>This book covers the new features of JAX-RS 2.0. It covers the complete lifecycle of a web service, that is, from server side to client side. The book focuses on the server API and the client API.</p> <p>You will learn how to use the server API in order to create web services that will be deployed on the server. This has all different implementations of HTTP methods and media representations. You will also get acquainted with the client API which specifies how to consume the deployed application’s web services. This includes how to handle different HTTP methods and media representations in response to the web services.</p> <p>You will also get to know Server Sent Events (SSE), which the server uses to push the data event directly to the client. The book will finally take you through the WADL specification. By the end of the book, you will be well equipped to implement Jersey 2.0 and JAX-RS.</p>
Table of Contents (13 chapters)

Implementing Server-Sent Events (SSE)


To use SSE, we need to register SseFeature on both the client and server sides. By doing so, the client/server gets connected to SseFeature to be used while traversing data over the network.

SSE: Internal Working

In the SSE: Internal Working diagram, we assume that the client/server is connected. When any new event is generated, the server initiates an OutboundEvent instance that will be responsible to have chunked output, which in turn will have a serialized data format. OutboundEventWriter is responsible to serialize the data on the server side. We need to specify the media type of the data in OutboundEvent. There are no restrictions of providing specific media types only.

However, on the client side, InboundEvent is responsible for handling the incoming data from the server. Here, InboundEvent receives the chunked input that contains serialized data format. Using InbounEventReader, data is deserialized.

Using SSEBroadCaster, we are able to broadcast events...