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Product Description
According to recent press reports, everyone is developing Web Services, but many are still in the exploratory phase - learning what's involved and how to achieve ROI. This book is designed to give a working introduction to Web Services to help decision-makers prepare for the implementation in their companies. It demystifies the topic by providing a beginning level explanation of what this technology is, what it means to businesses, where to apply it, and how to make it work.
Using numerous simple examples, the book explains the core concepts of Web Services: SOAP, UDDI, and WSDL, as well as tools and related concepts that will help create the "big picture" in readers' minds.
From the Back Cover
According to recent press reports, everyone is developing Web Services, but many are still in the exploratory phase - learning what's involved and how to achieve ROI. This book is designed to give a working introduction to Web Services to help decision-makers prepare for the implementation in their companies. It demystifies the topic by providing a beginning level explanation of what this technology is, what it means to businesses, where to apply it, and how to make it work.
Using numerous simple examples, the book explains the core concepts of Web Services: SOAP, UDDI, and WSDL, as well as tools and related concepts that will help create the "big picture" in readers' minds.
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The authors do a good job of explaining what web services are and how they differ from other technologies. They also do not fall victim to the evangelical bug, being very explicit in pointing out the disadvantages of web services as well as the advantages as a chapter is devoted to each point. Another chapter is devoted to comparing how web services differ from other technologies such as ASPs, JSPs, Common Gateway Interface (CGI), Common Object Request Broker Architecture (CORBA) and Java Remote Method Invocation (RMI).
The middle section of the book is devoted to describing the architecture of web services , the basics of XML, how web services communicate using XML and Simple Object Access Prototcol (SOAP), how web services are described using Web Services Description Language (WSDL), and how to advertise a web service using Universal Description , Discovery and Integration (UDDI). While not detailed, it is a complete introduction to all of the steps you must go through to create a complete web service that others can use.
The third section is devoted to describing several tools that can be used to build web services. Commercial tools such as Apache Axis, Java, .NET, IBM Websphere and BEA Weblogic are covered and the authors are to be commended in also showing how they can be built using inexpensive and free toolkits. Finally, the last section covers topics such as the interoperability of web services, how security is included in web services and what some of the future trends in web services may be.
This book is an introduction to web services, so it is not possible to learn all of the specifics you need to build complex web services from it. However, if you are a beginner, there is enough information to get you started and to help you make decisions concerning whether you want to start building them.
As someone who is not particularly technical, the code segments were still very useful in understanding what is going on. Without looking at a little code, understanding web services and its components becomes too esoteric. Why would you just describe an elephant when you can also provide a picture.
As someone who was just trying to understand web services and had no interest in comparing specific vendors' web services offerings, the chapters on commercial tools such as Apache Axis, Java, .NET, IBM Websphere and BEA Weblogic, and their specific pros/cons was not terribly interesting to me. But I could see how they would be valuable to an IT Professional.
The book does not really take 24 hours. Overall, I spent 9 intense hours working through this book to developing a good grasp of the technology. I recommend the opening chapters of 'Understanding .NET' by Chappell as a great supplement. Chappel gives great brief high-level descriptions on the components of web services and how they came about.
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I've never programmed with web services, but I need to know the terminology and basically what it's all about. This book served me well in this capacity.
It is not a book that goes into detail as to exactly how to do programming. This book is not technology specific, but rather after spending the first half easing the reader into exactly what web services are and why they exist, shows at a high-level how they are created with several different common technology platforms.
Also, there is a chapter on real world web services so the reader can go out and see exactly what web services look like when they are deployed in the "real world".
If you've never programmed a web services application before, I seriously doubt that you'll be able to do it after reading this book, at least nothing more than a simple example application. And in that sense, the title is a bit misleading. Perhaps it should have been "Introduce yourself to web services in 24 hours."
So, I can see how a certain type of reader might be dissapointed, but this book is exactly what I needed when I needed it.
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