ABSTRACT
Daniel Romero, Romain Rouvoy, Sophie Chabridon, Denis Conan,
Ni olas Pessemier, and Lionel Seinturier
5.5 Illustrating Dynami Context-aware Web Servi es with a Mobile Commer e
Abstract In ubiquitous environments, mobile appli ations should sense and rea t to environmental hanges to provide a better user experien e. In
order to deal with these on erns, Servi e-Oriented Ar hite tures (SOA) pro-
vide a solution allowing appli ations to intera t with the servi es available
in their surroundings. In parti ular, ontext-aware Web Servi es an adapt
their behavior onsidering the user ontext. However, the limited resour es
of mobile devi es restri t the adaptation degree. Furthermore, the diverse
nature of ontext information makes di ult its retrieval, pro essing and dis-
tribution. To ta kle these hallenges, we present the CAPPUCINO platform
for exe uting ontext-awareWeb Servi es in ubiquitous environments. In par-
ti ular, in this hapter we fo us on the middleware part that is built as an
autonomi ontrol loop that deals with dynami adaptation. In this auto-
nomi loop we use FraSCAti, an implementation of the Servi e Component
Ar hite ture (SCA) spe i ation, as the exe ution kernel for Web Servi es.
The ontext distribution is a hieved with SPACES, a exible solution based
on REST (REpresentational State Transfer) prin iples and beneting from
the COSMOS (COntext entitieS oMpositiOn and Sharing) ontext manage-
ment framework. The appli ation of our platform is illustrated with a mobile
ommer e appli ation s enario that ombines ontext-awareWeb Servi es and
so ial networks.
