/** Removed a participant form current room */
public void remove_user(String user) {
if (user != null && user.equals(user2)) user2 = null;
if (user != null && user.equals(user1)) {
if (user2 != null && !user2.equals("")) {
user1 = user2;
user2 = null;
} else user1 = null;
}
if (get_occupancy() > 0) put();
else delete();
}
public Room(String room_key) {
key_name = room_key;
put();
}