Rapport De Recherche a Exible Event Service for Database Cooperating Components a Exible Event Service for Database Cooperating Components

Future database software (i.e., applications, systems) can no longer be monolithic. Database technology is evolving towards cooperation and integration. Having components which inter-operate, being self-tuned, scalable and available are new challenges. Event infrastructures are well adapted to support software components integration. Therefore, we propose a exible event service which can be used for specifying and generating event managers. Managers are sophisticated brokers supporting anonymous event passing communication between distributed database services and applications. The key feature of our approach is the ability for our event service and managers to reconngure and adapt themselves with respect to component requirements and to their environment. Flexibility i.e., adaptability and extensibility is achieved, thanks to meta-programming and reeection techniques. Les bases de donn ees du futur evoluent des approches monolithiques vers des infrastructures a base de composants. Avoir des composants (i.e., applications, syst emes) inter-op erables, avec un haut degr e de disponibilit e et qui passent a l' echelle, sont de nouveaux challenges. Les infrastructures a ev enements sont bien adapt ees pour supporter l'int egration de com-posants logiciels. Nous proposons un service d' ev enements exible qui permet de sp eciier et g en erer des gestionnaires d' ev enements. Les gestionnaires supportent une communication anonyme par echange d' ev enements entre des services bases de donn ees r epartis et des applications. L'originalit e de notre travail est de proposer un service d' ev enements et des gestionnaires qui se conngurent et s'adaptent selon les besoins des composants et de l'environnement. L'adaptabilit e et l'extensibilit e sont assur ees gr^ ace a l'utilisation de techniques de m eta-programmation et r eeexion.