Reflective Analysis and Design for Adapting Object Run-Time Behavior

  • Authors:

  • Walter Cazzola;Ahmed Ghoneim;Gunter Saake

  • Affiliations:

  • -;-;-

  • Venue:
  • OOIS '02 Proceedings of the 8th International Conference on Object-Oriented. Information Systems
  • Year:
  • 2002

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Abstract

Today, complex information systems need a simple way for changing the object behavior according with changes that occur in its running environment. We present a reflective architecture which provides the abilityt o change object behavior at run-time by using design-time information. By integrating reflection with design patterns we get a flexible and easilyad aptable architecture. A reflective approach that describes object model, scenarios and statecharts helps to dynamically adapt the software system to environmental changes. The object model, system scenario and manyot her design information are reified by spe cial meta-objects, named evolutionary meta-objects. Evolutionary meta-objects deal with two types of run-time evolution. Structural evolution is carried out bycau sal connection between evolutionary meta-objects and its referents through changing the structure of these referents by adding or removing objects or relations. Behavioral evolution allows the system to dynamically adapt its behavior to environment changes by itself. Evolutionarym eta-objects react to environment changes for adapting the information theyh ave reified and steering the system evolution. They provide a natural liaison between design information and the system based on such information. This paper describes how this liaison can be built and how it can be used for adapting a running system to environment changes.