def METHOD_NAME(self):
    """
    _getDBConn_
    Retrieve the database connection that is associated with the current
    dataabase transaction.
    It transaction exists, it will return connection
    which that transaction belong to.
    This won't create the transaction if it doesn't exist, it will just return
    None.
    """
    myThread = threading.currentThread()
    if "transaction" not in dir(myThread):
        return None
    return myThread.transaction.conn