Service Registry


A requester must be able to reference a service's access and proposed contract details, which are often available in an online registry. Such a registry often conforms to the rules of Universal Description, Discovery, and Integration (UDDI), as described in Chapter 5.

A company can create its own registry for internal use and can create additional public registries, often in concert with other companies in the same industry. In addition, the company SAP AG operates a public UDDI registry.

In theory, the requester can retrieve the registered information at run time; however, this kind of programmatic retrieval is rare in practice. In most cases, the registered information is retrieved earlier. The registered information may be available to the requester at development time, as reflected in the requester's code or in the requester's call to a library that contains the details. The library may be written either before or after the requester is developed.

Alternatively, the registered information may be available to a network administrator or other professional who configures and then deploys the requester. This availability gives an organization greater flexibility because the selection of a service can occur relatively late.

Chapter 9 describes configuration-time opportunities that are available when you're working with Service Component Architecture.




SOA for the Business Developer. Concepts, BPEL, and SCA
SOA for the Business Developer: Concepts, BPEL, and SCA (Business Developers series)
ISBN: 1583470654
EAN: 2147483647
Year: 2004
Pages: 157
Authors: Ben Margolis

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