We used JavaSpaces/Jini in an EMRS system during the same period(and also tried GigaSpaces which was best impl) called Frontiers which was at some point used at

We used JavaSpaces/Jini in an EMRS system during the same period(and also tried GigaSpaces which was best impl) called Frontiers which was at some point used at many hospitals on both coasts. It did make things very flexible as in we knew we could just start ripping pieces out of the system during testing to make sure every piece was completely autonomous and definitely redundant with data. Also had "agents" in self contained "hot reloadable" classes because we learned about the discarded classloader trick. Man, learned so much fun/crazy stuff at that job.