Improving Web Services Adaptability Thanks to a Synergy between Aspect Programming and a Multi-agent Middleware

Many companies aim to use Web services to integrate heterogeneous and/or remote applications in SOA (Service Oriented Architecture) contexts. We noticed the code of the Web service is monolithic, mixing concerns, and difficult to maintain. On top of all, any change requires to re deploy the modified Web service. Business rules are very often spread out in applications code. Faced to these problems, we propose: 1) To improve the adaptability of Web services thanks to the aspect based service paradigm; 2) To improve adaptability for services coordination thanks to an Multi-Agent System. To explain our architecture, we use a concrete and pragmatic example.