Mediator provides sophisticated error handling capabilities that enable you to configure a Mediator service component for error occurrences and corresponding corrective actions. Error handling enables a Mediator to handle errors that occur during the processing of messages and also the exceptions returned by outside web services. You can handle both business faults and system faults with Mediator.

Business faults are application-specific and are explicitly defined in the service WSDL file. You can handle business faults by defining the fault handlers in Oracle JDeveloper at design time. System faults occur because of some problem in the underlying system such as a network not being available. Mediator provides fault policy-based error handling for system faults.

Fault policies enable you to handle errors automatically or through human intervention. Mediator fault policy-based error handling consists of the following three components:

• Fault policies

• Fault bindings

• Error groups