September 2010
Intermediate to advanced
766 pages
18h 35m
English
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Chapter 21. EJB 3.1 and Web Services
Support for web services in EJB 3.1 is based on the Java API for XML-based Web Services (JAX-WS) 2.1 specification, as well its predecessor, the Java API for XML-based RPC (JAX-RPC) 1.1. The name was changed primarily to avoid the common misconception that web services are only about RPC. Other specifications included in EJB 3.1 are the SOAP with Attachments API for Java (SAAJ) and the Java API for XML Registries (JAXR). JAX-WS and JAX-RPC are similar to RMI and CORBA, except they use the SOAP protocol; SAAJ is an API for manipulating the structure of a SOAP message; and JAXR allows you to access web services registries, usually UDDI.
Although this chapter and Chapter 20 provide you with a launching pad for learning about web services in Java EE (specifically EJB), the subject is too huge to cover in a book about EJB. In order to cover Java EE web services comprehensively, we would need another 500 pages. Since you’ll need to lift this book to read it, we wrote a lighter approach to the subject. This chapter provides you with an introduction to both JAX-WS and JAX-RPC, but you should not consider it a comprehensive guide to the APIs.
The main purpose of a web services API is to bridge Java components with the standard web services protocols. Unlike other distributed technologies, web services were designed to be very flexible and very extendable. Although this makes the technology more open and more adaptable, it also makes transparency harder ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.