Building the Core – Enterprise Business Flows - Applied SOA Patterns on the Oracle Platform - page 190

SOA patterns are vendor-neutral) for any of your projects where an agnostic controller's
functionality is required; however, for good reason, you should plan to implement it in
BPEL. Now we will drill into some details that are essential for its physical implementa-
tion, although we will stay focused on the positive execution scenario first (rollbacks will
be discussed later in the chapter).
All controllers' SOA artifacts will be packed into one composite for simplicity. This sim-
plicity will be illusive from the very beginning as we will have to handle synchronous and
asynchronous operations in one place. Thus, we will have two pairs of BPEL (as a service
broker and business delegate) and Mediator as a task router. However, that's the whole
idea: gradually convert a bulky solution into something composable. The four main steps
in the realization of this idea's realization are presented in the following SCA diagram:
Composition Controller's realization on SCA