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Formal development of cooperative exception handling for mobile agent systems

Laibinis, Linas and Troubitsyna, Elena and Iliasov, Alexei and Romanovsky, Alexander (2008) Formal development of cooperative exception handling for mobile agent systems. In: 1st Int. workshop on Software Engineering for Resilient Systems - SERENE 2008, November 17-19, 2008, Newcastle upon Tyne (UK). (In Press)



Mobile agent systems often require sophisticated cooperation and coordination during error detection and recovery. In this paper we propose novel fault tolerance mechanisms that support co-operative exception handling in such systems. The paper demonstrates how mechanisms like these can be formally developed and analysed. We start with identifying the typical modes of failures in agents and analysing possible failure and recovery scenarios in mobile systems. Stepwise refinement is used as our formal framework for top-down development and verification. Using the framework we formally verify the essential model properties, such as interoperability, local and global state consistency and termination of error recovery. Our approach provides developers with formal generic patterns for incorporating fault- tolerance mechanisms into mobile agent systems. We also demonstrate how the results of our formal development can be instantiated and reused in developing real-world agent a search for resources or other agents. Openness allows a number of agents from different administration domains to form multi-agent applications. Anonymity is collateral to openness and equally essential for decoupling, security and scalability. Agents are autonomous because they participate in a multi-agent application to achieve their own goals, so they do not have to follow protocols enforced by the third parties.

Item Type:Conference or Workshop Item (Paper)
Subjects:Methodology > Resilience
ID Code:34
Deposited By:Prof A Romanovsky
Deposited On:07 Oct 2008 17:19
Last Modified:19 Apr 2010 16:05

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