GTLAB: Grid Tag Libraries Supporting Workflows within Science Gateways

Portlet-based grid portals have become a crucial part of the cyberinfrastructure by providing component-based problem solving environments for scientists. Although portals aim to provide user-friendly environments with easy-to-use interfaces, the development of portals and their portlet components is time consuming. We aim to provide reusable components for rapid portlet development. Our approach grid tag libraries and beans (GTLAB), encapsulates common grid operations with reusable XML tags. GTLAB also provides a way for creating composite tasks that models the requirements of computational science portals. In previous work, we have introduced grid tags libraries for the Globus toolkit. In this study, we extend GTLAB to support widely used Condor DAGMan and Taverna workflows for the grid community. These extended tags demonstrate that large workflows can be integrated within grid portlets without burdening of developers.

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