Dynamic policies for supporting quality of service in service-oriented architecture

This paper describes how to simultaneously support both dynamic policies and separation of concerns when developing an SOA application. We propose the DPSL (dynamic policy specification language) for managing and controlling the QoS according to the dynamic behavior of the workflow in SOA. The operation model is compatible with existing SOA standards, such as the WSDL, WS-Policy, WS-SecurityPolicy, and the BPEL. The implementation and experimental results demonstrate the feasibility of the proposed architecture.