AWS-Policy: An Extension for Autonomic Web Service Description

In the last years, the need for integrating QoS to service oriented architecture has become a significant factor for managing service-based systems. In addition, combining self-* and policy-based management has major advantages since it reduces complexity management and effectively drives self-adaptation of Web services. Current service oriented architecture does not support policy-based self-management. To allow this, the description of autonomic Web services (AWS) must not be limited to functional and non-functional data. Indeed, QoS data are not sufficient to effectively drive the self-adaptation process. In addition, providers must participate in the self-adaptation process as they are aware of the capabilities and requirements of their published services and the exceptions that may occur. In this paper, we propose a rich information model that allows describing autonomic Web services based not only on QoS data but also on additional information such as service specific adaptation actions. We extend WS-Policy to specify services related data. UDDI is also extended to support policy-based self-management