| Most traditional workflow systems are based on workflow models proposed by WFMC and structured as C/S. As all the resources are saved on servers, not only data consistency is guaranteed, but can be widely used for production and automation, however, center-based server not only has an impact on system efficiency, but also leads to one point malfunction. The server slowed down due to frequent visit and the process of workflow can not be executed smoothly.As the development of workflow, the workflow based on centralized C/S architecture can not adapt the current situation. Nowadays, the distribution,autonomy,tolerance and flexibility of workflow is increasingly demanding. Generally speaking, the application of enterprise developed in distributed environments, accordingly, workflow system should also be developed with a distributed structure. P2P just meets the requirement and is the combination of distributed system and computer network. P2P enabled network model to transform from centered model to distributed model. The core use of network turned to every peer instead of servers. Due to the flexibility,equality,interconnection of P2P, The workflow based on P2P became a great direction.This paper presents the concept of P2P and designs a file transformation algorithm based on P2P information technology and message delivery. All the files involved in the flow are handled in several sections. In this way, we easily handle the risk of single-source bottleneck and make good use of resources of peers that enable us to send big accessory required by workflow to the due participant accordingly. The paper develops functions of initiating flow, handling flow and information feedback by defining forms and proper organizations. The running of workflow is driven by searching successor based on the platform of JXTA. Finally, the paper implemented the workflow management system based on JXTA and the system provided more efficient, reliable, flexible and adaptive service. |
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