ECOOP / Tutorial 09 (cancelled)

An Introduction to Web Services

Topic	An Introduction to Web Services
Goal	The goal of this talk is to help the participants to understand the various Web services specifications and their application.
Style	presentation + demos + discussion

Abstract

Web services is an evolving distributed computing framework based on component-oriented methodologies. Based on using Internet standards including HTTP and XML, Web services defines an infrastructure using SOAP as the communication medium, WSDL as the component description language and BPEL4WS as the composition language. Other aspects such as security, reliability, transactions and policy mechanisms are also being defined.

The growing number of specifications make Web services seem more complex than they really are. Understanding how these specifications fit together to form a flexible, open application integration framework is key to being able to take advantage of Web services and to realize their benefits.

This tutorial will help participants learn the significance of each of the major Web services specifications, the relationship between them, and how they address requirements in business and academic communities. Where appropriate, references will be made to existing open-source implementations of the specifications.

The topics which will be discussed include:

A brief XML refresher: XML, XML Namespaces, XML Schema
An Introduction to the Web services stack
Web service descriptions with WSDL
Interoperability with SOAP
Service orchestration: BPEL4WS
Service discovery: WSIL and UDDI
Securing Web services: WS-Security
Transactional Web services: WS-Coordination and WS-Transactions

Presenter Profile

William A. Nagy

William A. Nagy is a Software Engineer in the Component Systems group at the IBM T.J. Watson Research Center. He is a committer on the Apache SOAP project, and led the integration of Apache SOAP into IBM's WebSphere Application Server. He performed the initial integration of UDDI and the IBM Web Services Toolkit, and was one of the lead authors of the WS-Inspection specification. Most recently he has worked architecting and implementing the IBM Web Services Gateway and BPWS4J, IBM's prototype BPEL4WS engine. He holds a Masters degree in Computer Science from Columbia University.

Matthew J. Duftler

Matthew J. Duftler is a Software Engineer in the Component Systems group at the IBM T.J. Watson Research Center. He was one of the original authors of Apache SOAP, is the co-lead of JSR110, Java APIs for WSDL, and is a co-author of the IBM BPEL4WS engine, BPWS4J.

Sanjiva Weerawarana

Sanjiva Weerawarana is a Research Staff Member in the Component Systems group at the IBM T.J. Watson Research Center. He is one of the co-authors of the WSDL and BPEL4WS specifications, and a co-developer of Apache SOAP, the Web Services Invocation Framework, Java Record Object Model, the Web Services Gateway and BPWS4J. He is a lead architect of IBM's Web services technical strategy and represents IBM in the Web Service Description Working Group of the W3C where he's a co-editor of the specification. He received a Ph.D. in Computer Science from Purdue University in 1994.

Details

Presenter(s)	William A. Nagy, (IBM T.J. Watson Research Center) Matthew J. Duftler, (IBM T.J. Watson Research Center) Sanjiva Weerawarana, (IBM T.J. Watson Research Center and University of Moratuwa, Sri Lanka)
Date Duration	Tuesday, 22 full day
Level	beginner
Targeted Audience	Software developers and architects that want to gain a thorough yet practical understanding of how Web services can be used and developed. Familiarity with XML is required.