public synchronized void setWhiteBoardObjectListRoomObj(Long room_id, WhiteboardObjectList whiteboardObjectList){
whiteBoardObjectList.put(room_id, whiteboardObjectList);
}
public synchronized void setWhiteBoardObjectListRoomObjAndWhiteboardId(Long room_id, WhiteboardObject whiteboardObjects, Long whiteBoardId){
WhiteboardObjectList whiteboardObjectList = whiteBoardObjectList.get(room_id);
if (whiteboardObjectList == null) {
whiteboardObjectList = new WhiteboardObjectList();
whiteboardObjectList.setRoom_id(room_id);
}
whiteboardObjects.setWhiteBoardId(whiteBoardId);
whiteboardObjectList.getWhiteboardObjects().put(whiteBoardId, whiteboardObjects);
whiteBoardObjectList.put(room_id, whiteboardObjectList);
}