The human workflow service engine runs as a separate engine in the Oracle SOA Suite 12c service infrastructure providing human task execution functionalities to both BPEL and BPMN processes. The human workflow component consists of a number of services that handle various aspects of human interaction with a business process such as task approvals, rejections, reassignments, delegation, and so on.

An instance of the human workflow service engine can be initiated by an invocation from another service component such as the BPEL or BPMN engines. The message is routed to the engine by the SOA service infrastructure and is persisted by the workflow engine in dehydration store schema. Once an invocation transaction is committed, the instance becomes available for human interactions through a thin client such as a browser or mobile-based user interface. Each update on the instance or the runtime state through a user action is then handled by the engine...