Oracle BPEL process engine is a container that provides standards for assembling, developing, and executing synchronous as well as asynchronous services into end-to-end business processes in the SOA Infrastructure. When the soa-infra application is started, it initializes the BPEL engine in a stateless manner and loads composites from the MDS repository. If the composite contains any BPEL components, it targets them to the BPEL engine. At runtime, the BPEL engine waits for requests from different channels, such as messaging sources, databases, web services, and so on, and uses a Dispatcher module that maintains an in-memory logical queue containing units of work to process the incoming messages from these binding components. The BPEL process engine saves the process execution state in the dehydration store through a persistence module based on Oracle TopLink and hence there is no in-memory state replication required. The audit framework` continuously audits...