MobileJMS: Une solution globale d'adaptation des applications nomades

Middleware technologies have emerged as a key element of future mobile systems. In this paper, we argue that Message Oriented Middleware Systems (MOMS) provides a valuable solution to nomadic environment issues. They are characterized by a communication style allowing a strong decoupling between distributed entities. The first part describes MobileJMS, a MOM system characterized by communication adaptability and context-awareness. Its communication module is based on components which can be plugged and configured dynamically to deal with various events such as bandwidth variation or frequent disconnections. The second part is related to an overall adaptation model that makes adaptation decisions by considering user preferences, application requirements and execution context state. The key function of the model is the selection of the most appropriate policy to the current context.