一种面向用户的Web服务设计策略

提出了一个适用于计算网格资源包装的Web服务模型,采用工厂/实例模式、以用户为单位管理资源,把局域计算系统的全部资源作为一个整体,按照其为应用领域提供的功能,抽象成若干个符合WSDM规范的可管理资源.它们分别以一个工厂服务的形式,为远程用户管理、访问局域计算系统提供一致的Web界面.工厂动态创建的每个实例分别是应某个用户的要求而配置的专用执行环境,用一个符合WSRF规范的WS资源表示,可以执行任意数量的任务.该Web服务模型在计算网格协同平台Harmonia中被采用,以支持需要循环调用遗留程序的任务流.

A user-oriented Web service designing strategy

Web service model is proposed for resource standardization on computational Grids.It uses the factory/instance model to manage resources,and allocate resources according to users instead of jobs.Every local computing system is abstracted to a number of manageable resources that conform to WSDM,according to its functional capabilities.Each manageable resource is associated with a factory service,which provides a Web interface for remote users to manage and access the local computing system in a consistent way.Every instance dynamically created by factory is a customized execution environment,and is created and configured according to the request of some user.It is represented by a WS resource that is WSRF-conformable,and can be accessed to execute as many jobs as desired.To support workflows that involve calling legacy programs cyclically,this Web service model is exploited in Harmonia,which is a software platform for coordinative computing on computational Grid.