Workflow reference model Caption workflow reference model is a reference model for implementation of the workflow management system proposed by WFMC. The following is interpreted by each component: 1) Work Flow Enactment Service This component is our usual workflow or workflow engine. The main function is to read the workflow definition, and the driving of the drive workflow is defined according to the workflow. Generally commonly used open source Java workflows include Shark / Obe / OFBIZ. 2) Process definition Tool is used to define workflows in a graphical manner. Such as the famous JAWE. The interface between the Process Definition Tool and Work Flow Enactment Service is Interface 1. Interface is currently the XPDL standard. 3) Work Flow Client Application Workflow client program. The program is developed by the user combines business needs and uses it to drive workflow. The client program interacts with the engine via Interface 2. The general workflow engine user does not need to understand the engine's implementation, just know how to implement the client program. 4) Invoked Applications In the process of workflow operation, you may need to call the function other than the workflow, which can be done by defining INTERFACE 3. 5) Other Work Flow Enactment Service Interface 4 For workflows and other workflows. 6) Administration and Monitoring Tools is used to manage and monitor workflows, this is the interface 5.
Most of the workflow engines do not implement all interfaces, and each engine is distributed on different interfaces. If the interface 2 of OBE is achieved, the interface 4 is not implemented; the implementation of Shark interface 5 is nothing to do with other workflow engines.
