Figure 9-8. Custom interfaces versus hub-and-spoke approach
??? Each interface is specific
??? Expensive to develop and maintain
??? Adding systems is increasingly difficult
??? Queuing provides transport analog spokes
??? Hub provides message transformation
??? Adding systems is simpler
System
System
System
System
N-Touchpoints Hub-and-Spoke
System
System
System
System
HUB
Object Technologies and Distributed Components | 221
Object Technologies and Distributed Components
In theory, the greater the amount of information, the more intelligence that can be
extracted from it. Integrating information from separate systems can be an enormous
task, especially because the complexity of integration increases geometrically
as more systems are added to the mix.
While messaging technologies can assist with interfacing different systems, online
interaction is often needed as well. For example, if the Human Resources system
maintains information about the company??™s employees (such as the department in
which they work and their role), ideally the Purchasing system could access the data
in the HR system online at the time purchases are being made.
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