The WSLA Framework: Specifying and Monitoring Service Level Agreements for Web Services
Journal of Network and Systems Management
CARISMA: Context-Aware Reflective mIddleware System for Mobile Applications
IEEE Transactions on Software Engineering
Cross-layer self-adaptation of service-oriented architectures
Proceedings of the 3rd workshop on Middleware for service oriented computing
MUSIC: Middleware Support for Self-Adaptation in Ubiquitous and Service-Oriented Environments
Software Engineering for Self-Adaptive Systems
Software Engineering for Self-Adaptive Systems
Composing components and services using a planning-based adaptation middleware
SC'08 Proceedings of the 7th international conference on Software composition
Self-adaptive systems: a middleware managed approach
SelfMan'06 Proceedings of the Second IEEE international conference on Self-Managed Networks, Systems, and Services
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In service-oriented computing, the vision is a market of services with alternative providers offering the same services with different cost and quality of service (QoS) properties, where applications form and adapt dynamically through dynamic service discovery and binding. To ensure decent and stable QoS to end users and efficient use of resources, it is required that both client applications and service implementations are able to adapt both their internal configuration and their binding to other actors in response to changes in the environment. To this end, service level negotiation and agreements (SLA) are important to ensure coordinated end to end adaptation. In this paper we propose a solution based on the integration of an SLA mechanism into a compositional adaptation planning framework and describe a simple yet powerful implementation targeted for resource constrained mobile devices. As validation we include a case study based on a peer-to-peer distributed mobile application.