In this paper we present a proposal for safely evolving a software system against run-time changes. This proposal is based on a reflective architecture which provides objects with the ability of dynamically changing their behavior by using their design information. The meta-level system of the proposed architecture supervises the evolution of the software system to be adapted that runs as the base-level system of the reflective architecture. The meta-level system is composed of cooperating components; these components carry out the evolution against sudden and unexpected environmental changes on a reification of the design information (e.g., object models, scenarios and statecharts) of the system to be adapted. The evolution takes place in two steps: first a meta-object, called evolutionary meta-object, plans a possible evolution against the detected event then another meta-object, called consistency checker meta-object validates the feasibility of the proposed plan before really evolving the system. Meta-objects use the system design information to govern the evolution of the base-level system. Moreover, we show our architecture at work on a case study.

Software Evolution through Dynamic Adaptation of Its OO Design / W. Cazzola, A. Ghoneim, G. Saake - In: Objects, Agents, and Features: International Seminar : Dagstuhl Castle, Germany, February 16-21, 2003 : Revised and Invited Papers / Mark D. Ryan, John-Jules Ch. Meyer, Hans-Dieter Ehrich. - Berlin : Springer-Verlag, 2004. - ISBN 3540219897. - pp. 67-80

Software Evolution through Dynamic Adaptation of Its OO Design

W. Cazzola
Primo
;
2004

Abstract

In this paper we present a proposal for safely evolving a software system against run-time changes. This proposal is based on a reflective architecture which provides objects with the ability of dynamically changing their behavior by using their design information. The meta-level system of the proposed architecture supervises the evolution of the software system to be adapted that runs as the base-level system of the reflective architecture. The meta-level system is composed of cooperating components; these components carry out the evolution against sudden and unexpected environmental changes on a reification of the design information (e.g., object models, scenarios and statecharts) of the system to be adapted. The evolution takes place in two steps: first a meta-object, called evolutionary meta-object, plans a possible evolution against the detected event then another meta-object, called consistency checker meta-object validates the feasibility of the proposed plan before really evolving the system. Meta-objects use the system design information to govern the evolution of the base-level system. Moreover, we show our architecture at work on a case study.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/10290
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