Finding the Compromise – the Adapter Framework - Applied SOA Patterns on the Oracle Platform - page 406

and all necessary parameters were transported to the GA and Facade in a message payload
in the form of Adapter Message. Of course, the structure of this message is adapter bound
and these elements are extracted from the Service Repository during the EP construction
phase in the Composition Controller. We also kept the possibility to do the lookup in GA
for EP extraction simplification, as these attributes are not necessary for the entire com-
position. You can see the list of Transport adapters in the following figure:
In the scope of one chapter, it is simply impossible to cover dynamic implementation of
all adapters, so we will focus on the DB adapter first (as we did earlier during the RRD
example), as probably the most common and interesting and will show two different
methods of technical implementation. Before we do that, we will demonstrate how a tradi-
tional DB SCA adapter can be exposed on OSB and how we can decouple the EJB imple-
mentation using a proxy service on service bus. These two examples can be used directly
in your projects as well, but they are essential for understanding the dynamic approach.