MASTERING JAX-RS REST WEB SERVICES AND AJAX CLIENTS – WEBSPHERE 8.0 / RAD 8.0 – GTWB06

Course Description

This course covers the design principles of REST architecture along with the details of how to implement these services with JAX-RS. This will allow students who take the course to implement RESTful services using Java standards that will be portable to many different Java environments. Also covered are how to implement AJAX clients of RESTful services sending various data formats.

The Java JAX-RS specification covers how to implement RESTful services with Java. This specification is driven by annotations and can be leveraged from many different environments, including a Java EE ‘Application Server’. With the recent inclusion of the JAX-RS specification in the Java EE 6 umbrella of technologies implementing RESTful services with JAX-RS will become even easier.

It is also common to use an AJAX client with RESTful services. These clients are implemented in JavaScript so that browser-based applications can communicate with REST services to obtain data enabling a rich, Web 2.0 client experience.

This course is also available using Eclipse.

Topics

  • Primer on REST
  • Working with REST Resources
  • JAX-RS
  • Content Types in JAX-RS
  • REST vs SOAP
  • Building JAX-RS Responses
  • Clients of JAX-RS Services
  • JAX-RS Security
  • AJAX Review
  • JavaScript DOM Review
  • Consuming RESTful services with AJAX
  • Formatting and styling service response data
  • Working with secure services

What you will learn

After completing this course, the student should be able to:

  • Understand the REST style of software architecture
  • Describe the advantages and disadvantages of applying RESTful design strategies to various scenarios
  • Implement RESTful services using the JAX-RS Java specification
  • Create JAX-RS services that use various types of request/response Content
  • Compare and contrast REST with RPC, SOAP, and other similar communication strategies
  • Apply fine-grained control of the responses returned from JAX-RS services
  • Use various techniques to implement clients of RESTful services
  • Apply Java EE security to JAX-RS services
  • Consume REST services using AJAX
  • Format and style XHTML-compliant service data using CSS, XSLT, or both
  • Interact with secure data services

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Duration

4 days

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Target Audience

This course is applicable for Architects and Developers that need to design and develop RESTful web services using JAX-RS.

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Course Prerequisites

Experience with Java programming is required. Experience with Eclipse/RAD is useful but not required. For those that might need this Java or Eclipse/RAD experience the following course is suggested:

GTJ01 – Introduction to Java Using Eclipse

 An understanding of basic web architecture and the HTTP protocol. Prior experience with RPC-style services such as Web services, Java RMI, COM objects, etc. is helpful, but not required.

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Suggested Follow on Courses

There are a number of options of suitable follow-on courses, depending on your business needs.  Please contact us for further details.

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Course Content

Chapter 1. REST Services

Many Flavors of Services

Understanding REST

Principles of RESTful Services

REST Resource Examples

SOAP Equivalent Examples

REST vs SOAP Communication

More REST vs SOAP

REST vs SOAP Summary

Famous RESTful Services

Additional Resources

Chapter 2. Introduction to JAX-RS

The JAX-RS Specification

The Resource Class

A Bunch of Annotations

@Path

Using Path Parameters

HTTP Method Binding

More Complex Paths

Configuring JAX-RS for Deployment

Chapter 3. JAX-RS Data Injection

Sources for Injected Data

Path Parameters

Query Parameters

HTML Form Input

Cookies

Matrix Parameters

HTTP Headers

Default Values

Parameter Conversion

Custom Types

Chapter 4. Designing a RESTful Service

Introduction

The Design Methodology

Ingredients of a Service Operation Interface

What Constitutes a REST Resource

Resource Identifiers

MIME Types

HTTP Methods

Example Operation Interface Document

Chapter 5. JAX-RS Content Types

Internet Media Types

Use of Media Type in REST

The @Consumes Annotation

Content Negotiation

The @Produces Annotation

The MediaType Class

JAXB

Dynamic Content Negotiation

Chapter 6. Building Complex JAX-RS Responses

HTTP Response Status Codes

Introduction to the JAX-RS Response Class

Using the Response and Response.ResponseBuilder Classes

Example: Conditional HTTP GET

Returning Cookies

Cookies in Response Headers

Reading Cookies

Returning an Exception

ExceptionMappers

Chapter 7. REST vs. SOAP

Defining REST

The Six REST Architectural Style Constraints

The Four REST Interface Constraints

Hypermedia Examples

Defining SOAP

RPC SOAP vs. REST

Document SOAP vs. REST

Where SOAP Shines

Where REST Shines

Selecting an Appropriate Solution

Chapter 8. Clients of JAX-RS Services

Java Web Service Clients

Apache HttpClient

More Apache HttpClient Code

JAX-RS Implementation Client Libraries

RESTEasy Example

HATEOAS

Building Links with UriBuilder and UriInfo

Using Atom Links for State Transitions

WADL

WADL Example

Chapter 9. Introduction to AJAX

What is AJAX?

A Simple Example

The Old Way

The AJAX Way

Two Key Aspects of AJAX

What are the Advantages of the AJAX Approach?

AJAX Technologies

The Basic AJAX API

Creating the XMLHttpRequest Object

The XMLHttpRequest Object Basics

Complete Example

The Timeline

Chapter 10. AJAX API Details

The Request Object

Creating the Request Object

Properties of the Request Object

Methods of the Request Object

Simple GET Example

Making a POST Request

Making Concurrent Requests

Memory Leak With Inner Function

A POST Utility Function

Mozilla XmlHttpRequest Extensions

IE Microsoft.XMLHTTP Extensions

Ajax Caching

Control Cache Duration

Advanced Cache Control

Chapter 11. JavaScript DOM API

What is DOM?

Element Hierarchy

DOM Standardization

The Document Object

Nodes and Elements

The Element Object

Element Event Handlers

The window Object

The Frame Object

The History Object

Chapter 12. Communication With Server – Basic

Introduction

Application Layer Protocol

Choosing a Data Format

Plain HTML Snippet

XML Document

XML Document – Server Side

Example: Build DOM Document in Java

Example: Write DOM Document in HTTP Reply

Example: The Servlet

C#: Create a XML DOM Document

C#: Output XML in HTTP Reply

XML Document – Client Side

DOM API Summary

DOM API – The Document Object

DOM API – The Element Object

Body Text of an Element

Setting Body Text

Displaying Body Text

Using XML As Request Data

Creating a New DOM Document

Serializing DOM Document as Text

Posting an XML Document

Processing the Posted XML From a Servlet

Chapter 13. Communication With Server – JSON

Introduction

JavaScript Object Notation (JSON)

JSON Syntax

How Does JSON Based Communication Work?

JSON API in HTML5

How Does JSON Based Communication Work?

JSON: Server Side

JSON: Client Side

Working With Arrays

Advanced JSONObject Methods

Advanced JSONArray Methods

Chapter 14. Securing JAX-RS Services

HTTP Basic Authentication

Example Client

The WWW-Authenticate and Authorization Headers

Java EE Security Roles

Integration with Web Container Security

Java EE Security Annotations

SecurityContext

Restrictions Based on Content Type

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