On Workflow Engine Based on Service-Oriented Architecture

To simplify distributed application development, based on the principles and norms of SOA (Service-Oriented Architecture), the workflow engine is designed to manage the system´s business flow. Finite state automaton is used as the theoretical foundation of workflow´s definition, defining a process as a task, giving the task determinate states, and deciding the state of the task according by the states of all the services in the task as well as the user´s commands. The interaction between workflow engine and the client application is limited to the transfer of data and the users´ commands, and engine automatically set up business processes according to the services´ restrictions, for the effective isolation between client and the realization of business logic and simplifying the application development process.