Traditional software development involves writing complex programs by reusing and building upon off-the-shelf software libraries. The benefit of this paradigm is compile time availability of both, component interfaces as well as corresponding implementations. This enables software developers to write new programs that build on existing functionality without worrying much about runtime environment. Current shift towards service oriented computing presents a different paradigm that involves actively running components in the form of services. Here, it becomes necessary to discover the component(s) first and to determine whether some exist that satisfy the requirements specified. This requires a search operation to be performed in runtime service registries and prevents the software developer from creating new service oriented program without having to rely upon component availability in the runtime environment. Moreover, new web service instances may come up or existing ones may go down dynamically. This leads to frequent expiry of searched results making dependent programs highly brittle. In this paper, we present a novel approach for services based software development that proposes a paradigmshift from objects to services as first class entities.
By: Arun Kumar, Anindya Neogi, Sateesh Pragallapati, D. Janaki Ram
Published in: RI07003 in 2007
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