Flexible adaptation loop for component-based soa applications

Best paperInternational audienceThe Service Oriented Architecture (SOA) modelfosters dynamic interactions of heteregeneous and loosely-coupled service providers and consumers. Specifications likethe Service Component Architecture (SCA) have been used totackle the complexity of developing such dynamic applications;however, concerns like runtime management and adaptationare often left as platform specific matters. At the same time,runtime QoS requirements stated in Service Level Agreements(SLA) may also evolve at runtime, and not only the appli-cation needs to adapt to them, but also the monitoring andmanagement tasks. This work presents a component basedframework that provides flexible monitoring and managementtasks and allows to introduce adaptivity to component-basedSOA applications. The framework implements each phase ofthe autonomic control loop as a separate component, and allowsmultiple implementations on each phase, giving enough run-time flexibility to support evolving non functional requirementson the application. We present an illustrative scenario thatis dynamically augmented with components to tackle non-functional concerns and support adaptation as it is needed.We use an SCA compliant platform that allows distributionand architectural reconfiguration of component