*/
private static String getUserId(User user) {
String userId = user.getUserId();
if (userId == null) {
LOG.info("userId is null, so trying to obtain it from the datastore.");
AppEngineUser appEngineUser = new AppEngineUser(user);
ofy().save().entity(appEngineUser).now();
// Begin new session for not using session cache.
Objectify objectify = ofy().factory().begin();
AppEngineUser savedUser = objectify.load().key(appEngineUser.getKey()).now();
userId = savedUser.getUser().getUserId();
LOG.info("Obtained the userId: " + userId);
}
return userId;
}