For more information, see the following documents in the Oracle Fusion Middleware 12c documentation set:
Developing Resource Adapters for Oracle WebLogic Server
Oracle® Fusion Middleware Oracle E-Business Suite Adapter User's Guide
Developing SOA Applications with Oracle SOA Suite
Administering Oracle Fusion Middleware
Administering Oracle SOA Suite and Oracle Business Process Management Suite
Administering Oracle Service Bus
Oracle® Application Server Installation Guide for Legacy Adapters