Database Reference
In-Depth Information
It is highly important to realize the role of the Fusion technology layer for these runtime
frameworks. This layer, based on WLS and JVM(s) (it's also true for the APP and DB lay-
ers) provides all the necessary
Service Engines
(
SEs
) essential for the functioning of all
runtime frameworks and the hosting of our business-services logic.
Service Engines are the services that serve our services, so to say. As we can expect,
BPEL as a language will be interpreted and executed somehow; the same for ESB, where
proxy services must be decoupled from business services and the VETRO logic between
them must somehow be fulfilled. Actually, the transformation, translation, and rule veri-
fication do not belong to a single framework and are provided independently to any layer
that needs them. Moreover, their realization comes in the form of an engine, that is, how
we call them—for instance, the Rule Engine. SE can be implemented in several ways, but
the common requirements are portability, simplified binding of the engine and the service
component, and the unified messaging model.
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