Web Services

Introduction

Component Based Development took objects and found a way of making them available, publicising them, to the outside world. Java's highly successful component offering was EJB (and, in a different light, servlets). A few more pieces are necessary to allow Java objects to offer truly interoperable services to the world at large: a universally-supported message transport mechanism, self-describing messages and a service description language. Through a mixture of luck and judgement, SOAP messages, XML data and WSDL (Web Services Description Language) are all enjoying wide-spread adoption. With support for these, enterprise Java objects can truly offer interoperable services across the Web.

Duration and Construction

The course lasts two days. It is based on a cycle of theory-language-practice-review, with approximately two cycles per day. One non-trivial, practical case-study is developed during the course.

Each day will start at 09.00 and finish at 16.30.

Intended Audience

Participants will be practising software engineers who already know and use Java. They will probably have attended the Advanced Java course. They may well also have attended the Java Servlets and JSP or Enterprise JavaBeans courses. Participants should also be familiar with the basic idea of networks and the world-wide web.

Aims

• To understand the importance of, and rôle of, Web Services, including their relationship with .NET
• To understand and practise XML parsing and the document object model (DOM)
• To appreciate the importance of interoperability and WSDL (web services description language)
• To review HTTP and to understand SOAP (simple object access protocol)
• To understand and use XML-based RPC and SOAP
• To understand and use messaging services, SOAP and J2EE containers

Numbers

We recommend that there are no more than 10 participants, each working at his or her own machine.

Deliverables

• Lectures
• Facilitation of discussions
• Direction, assistance and feedback on exercises
• Proposed solutions to the exercises
• Copies of lecture slides, plus explanatory text and summaries
• Reference list of books and sources

Contents

• The nature and importance of Web Services, and interoperation with .NET
• XML and DOM review
• WSDL (web services description language)
• Objects, communication, JMS and SOAP
• Java XML parsing (JAX)
• JAX-RPC (Java API for XML-based RPC)
• JAXM (Java API for XML messaging)
• HTTP, servlets and containers review
• EJB review
• Deployment

Site Requirements

• One PC with Java 1.4 (Forte, JBuilder or Cafe) and J2EE, per participant (including one for the lecturer), preferably networked and with a printer
• Data projector with a real 1024 x 768 resolution, and suitable screen
• White-board, preferably not doubling up as the projector's screen; blackboard and chalk are acceptable
• Flip-chart and easel, with additional flip-chart paper

Contacting

Please contact John Deacon by telephone on +44 20 7498 3773; by fax on +44 20 7498 3747; by emailing  jdeacon@jdl.co.uk; or by visiting http://www.jdl.co.uk

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Last modified: Monday, 25-May-2009.
Copyright © 2007 John Deacon. All rights reserved.