出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：In recent years, several online services have proliferated to provide similar services with same
functionality by different service providers with varying Quality of Service (QoS) properties.
So, service composition should provide effective adaptation especially in a dynamically
changing composition environment. Meanwhile, a large number of component services pose
scalability issues. As a result, monitoring and resolving performance problems in web services
based systems is challenging task as these systems depend on component web services that are
distributed in nature. In this paper, a distributed approach is used to identify performance
related problems in component web services. The service composition adaptation provides
timely replacement of the performance bottleneck source that can prohibit performance
degradation for the forthcoming requests. Experimentation results demonstrate the efficiency of
the proposed approach, and also the quality of solution of a service composition is maintained.
关键词：Web service composition; Quality of Service; reconfiguration; self-adaptive; optimal.
