public synchronized void setWhiteBoardObject(Long room_id, WhiteboardObject whiteBoardObject){
whiteBoardObjectList.put(room_id, whiteBoardObject);
}
public synchronized void setWhiteBoardObjectListRoomObj(Long room_id, @SuppressWarnings("rawtypes") HashMap<String,List> roomList){
WhiteboardObject whiteBoardObject = whiteBoardObjectList.get(room_id);
if (whiteBoardObject == null) {
whiteBoardObject = new WhiteboardObject();
}
//whiteBoardObject.setObjList(roomList);
whiteBoardObjectList.put(room_id, whiteBoardObject);
}