Extensible Contract Broker for Performance Differentiation

  • Authors:
  • Pedro Furtado;Celso Santos

  • Affiliations:
  • Univ. Coimbra / CISUC;Univ. Coimbra / CISUC

  • Venue:
  • SEAMS '07 Proceedings of the 2007 International Workshop on Software Engineering for Adaptive and Self-Managing Systems
  • Year:
  • 2007

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Abstract

We denote as Self-properties the control a system exerts on itself autonomically to achieve and maintain Quality-of-Service (QoS). Our focus is in external, non-intrusive approaches and in this paper we focus mainly timeliness objectives. The self-adaptation process must be guided by the specification of the desired qualities. In this paper we describe the design of a Contract-Broker (C-Broker) architecture for implementing Quality-of-Service features and Selfproperties. We also show how basic QoS features were implemented in C-Broker. Our approach involved dynamic XML specifications for required parameters.