April 2006
Intermediate to advanced
456 pages
15h 32m
English
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What is the basic structure of an enterprise service?
An enterprise service is composed of two things: the service interface and the service implementation . The interface is a structure defined by a WSDL file and code that sends and receives messages to and from applications and other services that wish to consume the service, and the implementation contains the functionality and performs the actual work.
The interface itself is composed of service operations, or the specific ways a service is invoked. Each service operation has an interface and implementation that understand information received by the service, perform any transformation that takes place, manage any persistent state that is changed, and prepare any information sent back to the caller. Also present is a piece of metadata—the service documentation—that explains the functionality and other inner workings of the service implementation.
It's important to understand that each piece of functionality contained within the service requires a service operation to expose that piece for consumption by a service call from an application. For extremely simple services, only one service operation may be present. But most have at least several operations. Enterprise services are always a gateway to functionality that is provided by an existing system called a service provider, which may exist in the form of an exposed enterprise application or which might be built from scratch. Figure 4-10 shows the relationship between service ...
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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.