// Persist
UUID timeLineId = UUID.randomUUID();
Date currentDate = new Date();
MongoCompoundKey key = new MongoCompoundKey("mevivs", 1, timeLineId);
MongoPrimeUser timeLine = new MongoPrimeUser(key);
timeLine.setTweetBody("my first tweet");
timeLine.setTweetDate(new Date());
UserInfo userInfo = new UserInfo("mevivs_info", "Vivek", "Mishra", 31, timeLine);
em.persist(userInfo);
em.clear(); // optional,just to clear persistence cache.