An Introduction to Oracle Fusion – a Solid Foundation for Service Inventory - Applied SOA Patterns on the Oracle Platform - page 98

According to Oracle's Reference Architecture ( http://www.oracle.com/technetwork/topics/
entarch/oracle-pg-soa-governance-fmwrk-r3-0-176707.pdf ) , the second layer is an applic-
ation infrastructure, similar to the DB layer divided by application bundles into several
application domains (also covered by HA options).
From a technology standpoint, it is a pure application server implementation (on WebLo-
gic or any other JEE compliant server) with all the required elements of the server infra-
structure such as Node Managers, Admin Server, and Managed Servers in separate nodes.
Three distinguishable sublayers can be mentioned (following the MVC pattern) as fol-
lows:
• Core application logic presented by the traditional Java modules (EJB, POJO, and
so on)
• DB Persistence layer responsible for DB access, object-relational mapping for the
relational DB, or object extraction for the object-related NonSQL DB