September 2010
Intermediate to advanced
766 pages
18h 35m
English
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Defining a Web Service with JAX-RPC
Java EE provides two different programming models for defining a JAX-RPC web service: the web container model (or servlet model) and the EJB container model. Given that this book is about EJB 3.1, we assume you are more interested in the EJB model.
The core component in the EJB model is called an EJB endpoint. An EJB endpoint is a stateless session bean that is exposed as a web service. In addition to the remote and local component interfaces, there is another component interface, called the service endpoint interface. The service endpoint interface defines the abstract web services contract that the EJB endpoint provides to a web services client.
Because an EJB endpoint is simply a SOAP-accessible stateless session bean, it has the same advantages as other EJBs. An EJB endpoint runs in the same EJB container that automatically manages transactions and security, and provides access to other EJBs and resources via injection or the JNDI ENC.
The WSDL Document
Every EJB endpoint must have a WSDL document that describes the
web service. You can create this document by hand, or you can use the
tools provided by your Java EE vendor to generate it. The <portType> declared by the WSDL document
must be aligned with the endpoint interface of the web service. In other
words, the mapping between the WSDL <portType> and the endpoint interface must be correct according to the JAX-RPC specification. One way to ensure this is to create the WSDL document first, and ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.