关键词: OGSA Web Services网格计算 构件 动态编程模型

Abstract:

OGSA（Open Grid Services Architecture） is called the next generation grid architecture. We study the architecture of OGSA,and program a grid service  in the grid environment. How to wrap the conventional distributed software components by using Web Services, wrap the services provided by the isomerous
  components as automatically as possible, we make the users to visibly realize their business logical framework and integrate the WS component. From the angle of component, this system is exactly a multiple component,which provides services to external users in the Web Service mode. With the growing num
  ber of Web Services, it is necessary to compose the existing Web Services dynamically according to the service requests. A dynamic composition service m ethod is proposed based on keywords, according to the real-time user demand changes, to promote user programming. Through analyzing the characteristics 
   of primal Web Services composition we propose a dynamic programming model based on key word matching.

Key words: OGSA, Web Services, grid computing, component, dynamic programing model