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Data Warehousing and Data Mining

notes
figure 6.1: service-oriented application integration

Service-oriented Application Integration provides mechanisms to create composite applications,
leveraging services found in many remote systems.
Attempts to share common processes have a long history, one that began more than ten years ago
with the multi-tiered client/server a set of shared services on a common server that provided the
enterprise with the infrastructure for reuse and, now, for integration and the distributed object
movement. “Reusability” is a valuable objective. A common set of methods among enterprise
applications invites reusability and, as a result, significantly reduces the need for redundant
methods and/or applications.
While most methods exist for single-organization use, we are learning that there are times when
it makes sense to share between organizations. In a new twist on the longstanding practice of
reusability, we are now hoping to expand this sharing beyond intraenterprise to trading partners,
as well; for example, sharing a common logic to process credit requests from customers or to
calculate shipping costs using a set of Web services.
Unfortunately, absolute reuse has yet to be achieved on the enterprise level. It is an even more
distant goal between trading partners. The reasons for this failure are primarily political. They
range from internal politics to the inability to select a consistent technology set. In most cases, the
actual limit on reuse results directly from a lack of enterprise architecture and central control.
Utilizing the tools and techniques of application integration gives us the opportunity to learn how
to share common methods. More than that, these tools and techniques create the infrastructure
that can make such sharing a reality. By taking advantage of this opportunity, we are integrating
applications so that information can be shared, even as we provide the infrastructure for the
reuse of business logic.

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