rmi

http://javaweb.org/?p=556

http://lavasoft.blog.51cto.com/62575/91679

http://docs.oracle.com/javase/8/docs/technotes/guides/rmi/hello/hello-world.html

 

zookeeper

http://www.open-open.com/lib/view/open1416097626352.html

http://curator.apache.org/