Developing a Distributed Scalable Enterprise JavaBean Server

Abstract

We present here approaches of a distributed scalable Enterprise JavaBean (EJB) server. The first approach is based on the idea of the resource broker. By this model, the system is composed of one or several entry points called EJB “Front” servers, a resource broker and a set of participating servers called EJB “Back” servers. The resource broker gives the system its dynamic load balancing capacity and its dynamic scalability by implementing a notification protocol with the participants and providing information to the entry point servers. An experimental version of the server has been developed and we give some performance results achieved on it. Another approach is based on using a Jini/JavaSpace as a coordination system. We present the design and the implementation of this system as well as the issues of developing this Jini-based approach towards the distributed EJB server. We finally propose a new approach based on full Jini functionality.