design and development

In my role as a solutions architect, I find myself having to read vast quantities of technical material, much of which is sadly lacking in substance, diluted to the point of uselessness, biased in a particular technology (or vendor) direction, or simply just poorly written. Eric Newcomer's book is a refreshing change from much of the material I have had the misfortune to read lately - it is a well-written work that provides the reader with an excellent overview of Web Services and the use of the associated technologies. The book provides a well-balanced discussion of the various key technology areas (XML, WSDL, SOAP, UDDI), and includes many useful insights into the issues associated with these technologies and where the technologies are heading, based on current industry usage and standards formulation. The history of each technology area is discussed, providing the reader with useful background information. Attention is paid to the salient points, rather than getting bogged down in unnecessary details that might be readily obtained elsewhere. To this end, it is worth noting that a most pleasing feature of this book is the inclusion of a comprehensive bibliography, allowing the reader to readily identify sources of more detailed information on particular subject areas, if required (many of the references are freely available via the Internet).

As clearly stated in the introduction, the book is intended for IT professionals who need to understand Web Services, how they work, and (most importantly) what they are good for - the book is not intended to describe how to implement Web Services using a particular product offering from IONA (Eric Newcomer is the IONS CTO) or any other vendor. It is clear that Web Services are going to have a huge impact on the way we look at distributed computing, however it is also clear that the whole area of Web Services is still evolving. The book does not present Web Services as a 'silver bullet', but instead gives the reader a balanced perspective of the topic, thus providing a sound basis for informed decision making. Much of the material is presented in such a way that it can be readily understood and appreciated by less-technical IT professionals (such as managers like mine that no longer perform a technical role within the organization but want to understand what the heck I'm talking about).

With regard to implementation architectures such as Microsoft.Net and J2EE, the book does not pitch one technology against another, but instead simply states the facts, allowing the reader to formulate their own (now informed) views on these and other such tools and technologies, where and how they might be used, and so on. In addition to covering the main technology areas (XML, WSDL, SOAP, UDDI) the book also discusses alternative approaches to Web Services (ebXML) and perhaps less well-known technologies such as XML-RPC and Reliable HTTP, and what role these technologies might play in future developments. It is interesting to note that the SOAP specification is still being heavily debated, while XML-RPC has been stable for close to five years with implementations existing in many different programming languages. It is possible that some of these alternative technologies will play an important role in the future of Web Services, and a discussion of these technologies is most useful.

In summary, I found this book to be easy to read and highly informative. The writing style is clear and concise, and the book delivers pretty much exactly what it claims to. Wide and informed coverage is given to the subject area, and a comprehensive bibliography serves to provide a means of tracking down further information. The role of Web Services is clearly defined and a balanced discussion as to where and how they might be used is provided. Future developments in the Web Services space are considered, and the inclusion of material on less well-known technologies combines to make this book one of the most complete works on the subject to date. I would highly recommend this book to any IT or software professional interested in or needing to understand Web Services.

Eric Newcomer's book was written for the well read architect, technically minded manager, or developer who is interested in more than just bits and bytes. If you are interested in 'how to implement a Web Service in language X or Y', then look else where. If you have the mind for the bigger picture then this is the book for you. Although Eric Newcomer is CTO of IONA this book does not suffer from the typical vendor marketing hype that one has to typically wade through, more importantly being involved in the major organisations defining the Web Service standards he is able to give you an up to date well balanced opinion of where each technology (SOAP, WSDL, UDDI etc) is heading and problems facing each one.

For an architect or manager who has the responsibility of planning the future EAI strategic direction for the company this book provides an honest basis to make well informed decisions e.g. does one move towards ebXML now or wait, or choose SOAP, WSDL, UDDI as they appear to be heading. The book is easily read, starting with the basics, moving on to the core technologies making up Web Services, then to the less well known technologies being floated, finally to an overview of the product offerings from the major vendors. No book can be all things to all people and where Eric Newcomer has thought appropriate he has referred the reader to further reading.

In summary I can highly recommend this book to those who want to know:

- what are Web Services,
- where do they fit in to my organisation,
- where are Web Services heading and the problems they face,
- who/what are the main driving forces behind Web Services,
- how do the technologies (SOAP, WSDL, UDDI etc) fit together,
- what other technologies are currently being floated.

Web Services are posing an exciting future as a mechanism for 'globalising' the world of bits and bytes, this is a great book to come to grips with the world of Web Services.

I have been thrown into the web services technology without a parachute and this book has helped to put things into perspective. You are not going to sit down and write code from this book, but it does help to define all of the pieces of web services technology and get you started.

With that said, this was a difficult book to read because the writing style is very abrupt, does not flow, and reads like an old style academic textbook trying to impress and confuse the student. I've read more technical books that were easier to understand because they explain their subjects in more natural prose. I found myself frequently reading pages over one or more times.