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Using views for customizing reusable components in component-based frameworks

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2 Author(s)
Ivan, A.-A. ; Dept. of Comput. Sci., New York Univ., NY, USA ; Karamcheti, V.

Increasingly, scalable distributed applications are being constructed by integrating reusable components spanning multiple administrative domains. Dynamic composition and deployment of such applications enables flexible QoS-aware adaptation to changing client and network characteristics. However, dynamic deployment across multiple administrative domains needs to perform cross-domain authentication and authorization, and satisfy various network and application-level constraints that may only be expressed in terms meaningful within a particular domain. Our solution to these problems, developed as part of the partitionable services framework, integrates a decentralized trust management and access control system (dRBAC) with a programming and run-time abstraction (object views). dRBAC encodes statements within and across domains using cryptographically signed credentials, providing a unifying and powerful mechanism for cross-domain authorization and expression of network and application constraints. Views define multiple implementations of a reusable component, thus enriching the set of components available for dynamic deployment and enabling fine-grained, customizable access control. We describe the runtime support for views, which consists of a view generator (VIG) and a host-level communication resource (Switchboard) for creating secure channels between pairs of components. We present a simple mail application to illustrate how dRBAC, views, and Switchboard can be used to customize reusable components and securely deploy them in heterogeneous environments.

Published in:

High Performance Distributed Computing, 2003. Proceedings. 12th IEEE International Symposium on

Date of Conference:

22-24 June 2003