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Configuration and dynamic reconfiguration of components using the coordination paradigm

FUTURE GENERATION COMPUTER systems-THE INTERNATIONAL JOURNAL OF ESCIENCE 2001年第8期17卷 1023-1038页

作者： Papadopoulos, GA Arbab, F Univ Cyprus Dept Comp Sci CY-1678 Nicosia Cyprus Ctr Math & Comp Sci Dept Software Engn NL-1098 SJ Amsterdam Netherlands

One of the most promising approaches in developing component-based (possibly distributed) systems is that of coordination models and languages. Coordination programming enjoys a number of advantages such as the ability to express different software architectures and abstract interaction protocols, support for multi-linguality, reusability and programming-in-the-large, etc. Configuration programming is another promising approach in developing large scale, component-based systems, with the increasing need for supporting the dynamic evolution of components. In this paper we explore and exploit the relationship between the notions of coordination and (dynamic) configuration and we illustrate the potential of control- or event-driven coordination languages to be used as languages for expressing dynamically reconfigurable software architectures. We argue that control-driven coordination has similar goals and aims with the notion of dynamic configuration and we illustrate how the former can achieve the functionality required by the latter. (C) 2001 Elsevier Science B.V. All rights reserved.

关键词： coordination languages and models software engineering for distributed and parallel systems modelling software architectures dynamic reconfiguration component-based systems

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distributed and parallel systems engineering in MANIFOLD

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parallel COMPUTING 1998年第7期24卷 1137-1160页

作者： Papadopoulos, GA Univ Cyprus Dept Comp Sci CY-1678 Nicosia Cyprus

A rather recent approach in programming parallel and distributed systems is that of coordination models and languages. Coordination programming enjoys a number of advantages such as the ability to express different software architectures and abstract interaction protocols, supporting multilinguality, reusability and programming-in-the-large, etc. However, most of the proposed models and languages are data-driven in the sense that changes in the behaviour of the formalism are triggered by detecting the presence and examining the nature of data values. In addition, more often than not, the formalism does not clearly separate the computation components from other related components, namely (and primarily) communication ones, but also synchronisation components, etc. In this paper, we use a coordination model (IWIM) and language (MANIFOLD) which are control-driven in the sense that the formalism's change of behaviour is modelled as state transitions triggered by means of raising events and detecting their presence, i.e., without involving the actual data being manipulated. We illustrate the main features of this formalism and we show how it can be used in supporting a variety of activities related to distributed and parallel software engineering, and software architectures. Throughout, we place emphasis on the control-driven nature of this formalism, discussing how that has helped us in modelling a variety of scenarios. Finally, we also compare the formalism with other such formalisms highlighting the differences between them. (C) 1998 Elsevier Science B.V. All rights reserved.

关键词： coordination languages and models distributed and parallel computing models and tools software engineering for distributed and parallel systems modelling software architectures

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