A space-based compute server is a powerful, all-purpose computing engine that accepts tasks, computes them, and returns results. In this article, Susanne Hupfer shows how to use Jini transactions to make the compute server application from Part 2 more robust and multiple JavaSpace services to make it more scalable.
Read this Artima.com article:
http://www.artima.com/jini/jiniology/js5.html