Java Web Services - David Chappell - Tyler Jewell

At the end of the day, Web services aren’t hard to conceptualize.
They’re just a bunch of software modules with specific rules about how
they go about discovering one another and sending messages back and
forth. Implementation is another story, however. In the Java language,
writing Web services requires an understanding of half a dozen
specialized APIs at minimum, and more than that if you want to do
fancier stuff. Java Web Services does a very good job of dispersing the confusing terminology (and obfuscating hype) and of showing you exactly how to do
Web services work in Java. This doesn’t sound like a revolutionary
concept, but unfortunately it is. David Chappell and Tyler Jewell have
comfortably fit into less than 250 pages what others have not done as
well in twice as much space.

Take Universal Description, Discovery,
and Integration (UDDI) work as an example. UDDI exists to help software
locate other software that does what it wants. How do you do that?
Chappell and Jewell present two concise program listings–a client and
a server–that show how to do a UDDI lookup. They then refine their
code by using a third-party API that makes the work easier. Similarly
pragmatic attention goes to Simple Object Access Protocol (SOAP), in
which they show how to create a message, populate it with XML, make an
attachment if necessary, and send it on its way. You won’t find a lot
of frills or conceptual explanations (though there are enough “why”
sections to ensure that you’re not just typing recipes blindly); the
emphasis is on writing Java code that interacts with Web services
protocols and standards. –David Wall

Topics covered:
How to write Web services software in Java, with respect to Universal
Description, Discovery, and Integration (UDDI), Simple Object Access
Protocol (SOAP), and Web Services Description Language (WSDL). There’s
also coverage of interprocess communication under JAX-RPC and ways to
implement security. All of the low-level stuff is here. Look elsewhere
for architecture and design information.

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