Integrating Agent and Web Service into Grid Service Workflow System

The dynamical Grid environment requires flexible and adaptive workflow system. This paper integrates Agents and Web Services into Grid Service Workflow System based on Colored Petri Nets. The combination of Agents and Web Services enhances the adaptability and dynamics of the framework. How Web Service can be located dynamically and the services provided by it can be invoked are discussed. Using an example of ordering railway ticket, we show how our framework can achieve adaptability from process, resource and task perspectives using both Agents and Web Services.