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ThinkMind // ADAPTIVE 2012, The Fourth International Conference on Adaptive and Self-Adaptive Systems and Applications // View article adaptive_2012_5_10_50066


Using Role-Based Composition to Support Unanticipated, Dynamic Adaptation - Smart Application Grids

Authors:
Christian Piechnick
Sebastian Richly
Sebastian Götz
Claas Wilke
Uwe Aßmann

Keywords: Dynamic Variation; Unanticipated Adaptation; Role-Modeling; Composition; Repository.

Abstract:
Due to the wide acceptance and distribution of mobile devices, it has become increasingly important that an application is able to adapt to a changing environment. This implies the necessity to integrate varying functionality at runtime being activated depending on the current context. A common approach is to foresee and model all possible influencing factors and to integrate the required software building blocks in advance. But, due to the constant change of the environment, as described by Lehman's laws, it is impossible to anticipate all future situations. Hence, modeling the entire adaptation process at design time prohibits the adaptation to unanticipated scenarios and, thus, is likely to lead to the malfunctioning of the adaptive application in the future. In this paper we focus on unanticipated, dynamic self-variation of applications (i.e., without a central coordinator) and propose a role-based composition system that enables the adjustment of the structure and functionality of software-objects in a fine-grained manner. Systems following our proposed approach form a Smart Application Grid (SMAG). The SMAGs-Approach is putting emphasis on dynamic collaborations between components within an application and between several different software systems. Therefore, role-modeling is used to model and perform dynamic variation of applications at runtime, whereby roles are stored in central repositories. This allows the integration of previously unknown software-building-blocks and the dynamic adaptation to situations that were not foreseen.

Pages: 93 to 102

Copyright: Copyright (c) IARIA, 2012

Publication date: July 22, 2012

Published in: conference

ISSN: 2308-4146

ISBN: 978-1-61208-219-6

Location: Nice, France

Dates: from July 22, 2012 to July 27, 2012

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