NMI: Collaborative Proposal: Middleware for Grid Portal Development

该建议旨在促进使用portlet/容器方法构建门户的网格门户开发。这种方法将门户控制和基本服务与内容分开。中央控制服务器提供基本门户服务，如身份验证、访问控制和用户可定制性。在这个框架中，使用称为portlet的软件组件将门户内容和自定义服务插入。容器管理portlet的组织和交互，portlet交付特定的web内容（本地或远程），包括网格服务接口。基于portlet的设计概念支持分布式、松散耦合的开发和部署：用户界面和科学接口组件可以使用标准portlet API独立开发，然后在门户之间重用。服务和接口可以以良好定义的方式安装并添加到各种门户中。portlet模型也非常适合新兴的开放网格服务体系结构（OGSA）及其实现规范——开放网格服务基础结构（OGSI）。由于OGSI基于新的web服务标准，因此每个网格服务都可以由自定义portlet直接访问。随着近年来由底层网格技术收集和组织的巨大资源成为全球研究社区桌面可用组件的可见性，使网格易于被国际研究社区的研究人员所接近的影响可能是极其巨大的。该项目将极大地简化网格技术的使用，并通过可重用性和简化安装来支持网格门户技术的扩散，从而使个人研究人员和团体可以随时获得新的服务。科学家将能够轻松地与世界各地的合作者组成灵活的小组，并使用网格共享数据和资源。该项目为已建立的用户组和临时用户组之间的协作提供了工具，使这些科学家能够有效地就他们正在从事的科学相互交流，并提供定制的网格视图，以满足协作组的需要。

This proposal is designed to facilitate grid portal development using the portlet/container approach to building portals. This approach separates portal control and basic services from content. A central control server provides basic portal services such as authentication, access control, and user customizability. Into this framework, portal content and custom services are plugged in using software components called portlets. The container manages the organization and interaction of the portlets, and the portlets deliver specific web content (either local or remote), including Grid service interfaces.The portlet-based design concept supports distributed, loosely coupled development and deployment: user interfaces and science interface components can be developed independently, using the standard portlet API, and then reused between portals. Services and interfaces may be installed and added to various portals in a well-defined way. The portlet model is also an ideal fit to the emerging Open Grid Services Architecture (OGSA) and its implementation specification, the Open Grid Service Infrastructure (OGSI). Because OGSI is based on the new web-service standards, each Grid service can be directly accessed by a custom portlet. The impact of making the Grid readily approachable by the international community of researchers is potentially extremely large, as the immense resources that have been collected and organized in recent years by the underlying Grid technologies become visible as usable components of the global research community's desktop. This project will greatly simplify the use of Grid technologies and allow new services to be made readily available to individual researchers and groups by enabling the proliferation of Grid portal technology through reusability and simplification of installation. Scientists will be able to easily form flexible groups with collaborators across the world and use the Grid to share data and resources. This project provides tools for collaboration between established and ad hoc groups of users, enabling those scientists to communicate effectively with each other about the science they are doing, and providing customized views of the Grid that are tailored to meet the needs of collaborating groups.