executionadministration ea = shark.getinstance().getadmininterface().getexecutionadministration();
ea.connect(username, password, enginename, null);

// subprocid为子流程序号
wfeas = ea.getprocess(subprocid).get_sequence_history(0);

if ( wfeas != null )
{
    for ( int i = 0; i < wfeas.length; i++ )
    {   
        if ( wfeas[i].event_type().equals("processcreated") )
        {
            wfcreateprocesseventaudit wpea = (wfcreateprocesseventaudit)wfeas[i];
            // parentprocid 为父流程序号
            parentprocid = wpea.p_process_key() == null ? "" : wpea.p_process_key();

            break;
        }
    }
}