一种基于P2P的工作流管理系统设计

基于客户机/服务器结构的工作流管理系统，其中心化的服务器不仅影响系统性能，而且容易导致单点故障.通过引入P2P（点对点，即通过节点间的直接信息交换来实现计算资源和服务的共享）概念，给出了一种非中心化的工作流管理系统设计方案，系统中的每个节点既是客户端，同时又可以承担数据存储和流程控制的职责.基于JXTA（Juxtapose项目，SUN公司为了支持P2P应用而提供的一个底层开源平台）的实现及就诊工作流应用表明，非中心化工作流管理不仅对环境变化具有良好的适应性，而且可以为工作1流参与者提供更多的自主性.

P2P-based workflow management system

In a workflow management system based on client/server architecture, centralized server can not only degrade the system performance, but also easily lead to the single-node failure. A decentralized workflow management system is proposed, which applies P2P (peer to peer, that is, to sharethe computer resources and services by direct exchange between systems) concepts to workflow scenarios. Each node within the system acts as a client application, which can also perform functions of a data repository and a process controller. Based on the JXTA realization (project Juxtapose, an open-sourced platform which was developed by the Sun Company to support the P2P application) and the application of the medical consultation workflow system, it demonstrates that the decentralized workflow management has good scalability under a dynamic environment, which can also offer higher autonomy for the workflow user.