Politique de Liaison aux Services Intermittents dirigée par les Accords de Niveau de Service. (SLA-driven Binding Policy for Intermittent Services)

Lately, the evolution of information technologies has been following two trends. On the one handthe proliferation of communicating devices contributes to the creation of an ambient intelligence.On the other hand, the booming of Internet associated with the rapid growth of data centrescapabilities results in the emergence of an internet of services. In both domains, application designis challenged by the dynamic availability of computing resources and data. The combination of component-based software engineering and service-oriented computingtechniques allows service bindings to be driven by policies. However, for the time being, policieseither follow a dynamic approach which does not suit the needs of architectural stability whendealing with intermittent services, or a static approach which does not allow dynamicreconfiguration. The work presented in this thesis proposes a trade-off between the two approaches byconsidering service disruptions as a major concern. The proposed binding policy relies on servicelevel agreements to be disruption-tolerant, since service-level agreements allow expressing andenforcing obligations regarding availability and quantified disruptions. This approach has been implemented on the OSGi service platform and iPOJO, a service-oriented component model for OSGi. iPOJO service dependency management has been extendedin order to support our policy. The latter was validated both in the context of ambient intelligence,and on open-source and OSGi-based JOnAS application server.