This exercise does not require using
clusters that share similar gravitational force. They can be very distinct clusters that despite their
unique common functionality and attributes can still be found. This point can be further clarified
by viewing Exhibit 13.14. Note the two service clusters that empower a homeland security Web
site: security training and security products. Their overlapped section identifies two common
shared services: search engine service and data aggregator service.
Rudimentary Asset Reuse Requirement Example. Now, consider a more formal presentation
that illustrates the service reusability paradigm. At this point, use the analysis and discovery,
service-oriented business integration, and service design model notations studied thus far.
These icons can help depict how to construct a final logical design composition diagram. Start
with a rudimentary formal analysis proposition diagram??”depicted in Exhibit 13.15??”which
Security Training
Channel
Service Cluster
Security
Products
Channel
Service Cluster
Search Engine Service
Data Aggregator Service
EXHIBIT 13.14 INTERSECTED SERVICE CLUSTERS
274 Ch. 13 Service-Oriented Logical Design Composition
Investments Account
Service Cluster
(analysis service
cluster)
Banking Account
Service Cluster
(analysis service cluster)
EXHIBIT 13.15 SERVICE ANALYSIS PROPOSITION: INTERSECTED SERVICE
CLUSTERS
communicates a reusability requirement.
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