Using Model-Driven and Aspect-Oriented Development to Support End-User Quality of Service

Nowadays, more and more applications are distributed and require runtime guarantees from their underlying environment. To reach theses guarantees, Quality of Service (QoS) information must be provided. The development of QoS-aware applications requires the control and management of low-level resources. It is a complex task to correlate high-level domain-specific QoS requirements with low-level system-dependent characteristics. Various middleware architectures have been proposed to provide a QoS support [1][2] and to free the designer from low-level resource concerns. Some architectures [3] use dynamic adaptation of applications or a component-based conception [4]. Our approach uses the Model Driven Architecture [5]: the mapping of QoS constraints with platform specific resource management can be automated during the transformation steps leading from the model to the software implementation. In this paper, we present a solution to model high-level user-oriented QoS constraints, and we demonstrate that the MDA, associated with Aspect-Oriented Software Development, can ease the conception of QoS aware application.