Database Reference
In-Depth Information
This grouping should attract our attention as it has a direct relation with the physical real-
ization of the SOA patterns and the Registry layering in particular. During the installation,
you probably noticed that we can install the Registry in three different modes: Publication,
Intermediate, and Discovery. This is how Oracle (quite cleverly) implements the double D
in the UDDI standard. Naturally, as an architect, you will not allow anyone registering for
new/updated services directly in your production registry. Initially, information should be
injected into the Publishing registry (first D) and you can have as many as you need (per
business domain, GU, or service roles). All these registries are stacked vertically, that is,
they have the same rank. After approval, metadata will be propagated to the Discovery
Registry (second D). You will find more details about the OSR data model/tModel rela-
tions and deployment topology in the Oracle documentation at http://docs.oracle.com/cd/
E14571_01/doc.1111/e15867/uddi.htm .
Publishing service artifacts and taxonomy categories (see the following screenshot, part 2 )
using the UDDI console is straightforward. Just follow the screen instructions after click-
ing on the menu options at the top (for WSDL and other XML-based artifacts) or the tabs
on the left for Details , Categories , and Identifiers (see the following screenshot, part 3 )
when modifying business entities or tModels.
According to the SOA Governance cycle, any artifact has to pass several approvals and be
accepted by several custodians (for example, Service, XSD/Schema, and the Policy and
Registry custodians). Thus, in addition to vertical layering, we will have a horizontal
chain, presented by the intermediate registries between the publication and discovery.
It is wise to have individual Intermediate Registries in every individual test environment,
JIT-UAT-ORT as well, and promote services to production only after passing all accept-
ance gates:
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