40 Years of Computing at Newcastle

Department Technical Report Series No. 596

Co-ordinated Exception Handling in Distributed Object-Oriented Systems: Improved Algorithm, Correctness and Implementation

J. Xu, A. Romanovsky and B. Randell

University of Newcastle upon Tyne. 1997.

Abstract

We address the problem of how to handle exceptions in distributed object-oriented systems. In a distributed computing environment exceptions may be raised simultaneously and thus need to be treated in a co-ordinated manner. We propose a new distributed algorithm for resolving concurrent exceptions and prove that the algorithm works correctly even in complex nested situations, and is an improvement over previous proposals in that it requires only O (nmax x N2) messages, and is fully object-oriented. We introduce a prototype implementation of the proposed resolution mechanism (including the related action supporting system) in Ada95 and present a brief analysis of implementation and performance-related issues.

Department Technical Report Series - 1997
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Technical Report Abstract No. 596, 30 June 1997