How to move data from mobile to remote server and back

I am trying to develop multiplayer turn based android game which will be coordinated using a remote server. I want to use couchbase nosql server with java sdk. I do not understand how data will be moved from mobile to database and back. Could you please help me ? Do I need to use jetty or tomcat ? Is there any other way ? What has been used by other gaming companies. Mostly I have worked on client side only so I am not able to figure this out.