Self-Adaptive Goal-Driven Web Service Composition Based on Context and QoS

In this paper, we propose a framework to implement a self-adaptive goal-driven service composition based on context and QoS approach. According to our approach, every concrete composition is regarded as an instantiation of the goal abastract graph, which is regarded as the abstract composition. By means of incorporating, a feedback system, our approach can handle composition requests failures using the transformation of the failed composition requests into alternative ones that can be solved. Moreover, our approach integrate a self-adaptive mechanisms to adapt the service composition to the distributed, open and dynamic nature of services and the changing user's environment. Furthermore, we present self-adaptive mechanisms monitoring the service composition execution. At last, the result of a case study showed our approach effectiveness.