Another Way of Defining What Web Services Do: Consider Publish, Find, and Bind


Here is another way to understand how Web services work. Web services directories and protocols essentially serve three functions: publish, find, and bind. To use Web services, applications are:

  • Published in a common UDDI directory (such that cooperating applications can find each other);

  • Found (using WSDL protocols that can locate Web services applications and determine if those applications can work with the source application); and

  • Bound (a communications link between the two applications is established, so that a service such as performing some sort of calculation or transaction can be rendered using SOAP protocols).

These three service elements and their relationship to requester, broker, and provider services are illustrated in Figure 1-1.

Figure 1-1. Web Services: Publish, Find, Bind.

graphics/01fig01.gif

In this illustration a service requester is either you or your source application. The requester initiates the request for a Web service application. The Service Provider is the Web services application itself. The Service Broker can be a company that provides lists and information about Web services programs, or a Service Broker can refer to the programmatic process that helps locate an application and helps the two cooperating applications determine how to best communicate.



Web Services Explained. Solutions and Applications for the Real World
Web Services Explained, Solutions and Applications for the Real World
ISBN: 0130479632
EAN: 2147483647
Year: 2002
Pages: 115
Authors: Joe Clabby

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