Low-Cost Error Containment and Recovery for Onboard Guarded Software Upgrading and Beyond
IEEE Transactions on Computers - Special issue on fault-tolerant embedded systems
Knowledge-Based Software Engineering
Knowledge-Based Software Engineering
Dependable On-Line Upgrading of Distributed Systems
COMPSAC '02 Proceedings of the 26th International Computer Software and Applications Conference on Prolonging Software Life: Development and Redevelopment
Dependable computing: concepts, limits, challenges
FTCS'95 Proceedings of the Twenty-Fifth international conference on Fault-tolerant computing
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The integration of complex systems out of existing systems is an active area of research and development. There are many practical situations in which the interfaces of the component systems, for example belonging to separate organisations, are changed dynamically and without notification. Usually systems of system (SoS) developers deal with such situations off-line causing considerable downtime and undermining the quality of the service that SoSs are delivering [Romanovsky & Smith 2002]. In this paper we propose an approach to on-line handling such upgrades in a structured and disciplined fashion. All interface changes are viewed as abnormal events and general fault tolerance mechanisms (exception handling, in particular) are applied to dealing with them. The paper outlines general ways of detecting such interface upgrades and recovering after them. An Internet Travel Agency is used as a case study throughout the paper. An implementation demonstrating how the general approach proposed can be applied for dealing with some of the possible interface upgrades within this case study is discussed.