Home // International Journal On Advances in Software, volume 5, numbers 3 and 4, 2012 // View article

Quality Attributes for Web Services: A Model-based Approach for Policy Creation

Authors:
Alexander Wahl
Bernhard Hollunder
Varun Sud
Ahmed Al-Moayed

Keywords: Service-oriented architecture; Web services; QoS meta-model; model-to-model transformation; model-to-code transformation; WS-Policy.

Abstract:
Service-oriented architectures (SOA) define a conceptual framework for the creation and integration of enterprise applications. Within an SOA, the core functionality is realized by distributed services, which are typically composed to support the required business processes. Today, Web services are the predominant technology to implement and deploy services in heterogeneous environments. In many business domains, Web services must exhibit quality of service (QoS) attributes such as security, performance, scalability, and accounting. Currently, there is only limited support for the assignment of QoS attributes to Web services, though. In this paper, we present a model-based approach for deriving policies from a QoS model. Our solution covers the modeling of QoS attributes based on a meta-model for quality attributes, the generation of a graphical user interface to configure the modeled QoS attributes, and the transformation into policy descriptions. Finally, these policies will be assigned to the target Web services. To highly automate our approach, we apply techniques from model-driven development such as model-to-model and model-to-code transformations. As a consequence, our solution reduces the cost and effort when creating QoSaware Web services.

Pages: 166 to 178

Copyright: Copyright (c) to authors, 2012. Used with permission.

Publication date: December 31, 2012

Published in: journal

ISSN: 1942-2628