Research And Implement Of Workflow Management System For Distributed Application

Business Process Rebuilding is generated frequently in enterprise for adapting for changing outside environment. There are alliance and virtual organization among enterprises, and these Virtual Organization have the characters of distributed, dynamic, heterogeneous, autonomous in application. The research of workflow system for distributed application focus on cooperation of business process among enterprises, and the development of workflow system software is under the scope of this paper.For visual organization, the computing resources are highly heterogenous, and computing and data resources are geographically dispersed in different administrative domains with different policies for security and resource uses. The workflow system for distributed application should be running in this environment and integrating with legacy workflow system. With the development of GRID technology, the research on workflow has a new path to support today's process management application in enterprises.The software system of workflow is based on GRID platform, which supports distributed application. At first, requirement of workflow system is discussed, and the research activities in this field are introduced. Then, the architecture of workflow system based on GRID is built, and the WSRF(Web Services Resource Framework) is adapted for GRID. For definition of workflow, Color-Petri Net is adapted. The formalization description for resources in GRID environment is defined. At last, the implementation of workflow system based on GRID is introduced. Especially, the methods for encapsulating legacy system is into web services are introduced.In conclusion, this paper pays attention to four points.1. The architecture of workflow system. This architecture is based on GRID, and WSRF is adapted. All the components in system are defined as Web services. Web Services can be deployed in GRID platform, and interchanged with other Web services in distributed environment.2. The definition of workflow. Using Color-Petri Net, the actions are classified, and static structures and dynamic behaviors are defined. Grid services can...