User Login Control in ERP ssytem

Remark by Jimmy on June 4th 2010 am
According to the user's cost profit center set limit to subscribers,So that the largest number of user login to control the ERP.
X++ code below as:
the method inside of sysUserLog table sub insert method.
AX 2009 test successful

public void Jimmy_startupPostUserControl()
{
/**
remark by Jimmy on June 4th 2010 am
According to the user's cost profit center set limit to subscribers,So that the largest number of user login to control the ERP.
X++ code below as:
the method inside of sysUserLog table sub insert method.
AX 2009 test successful
*/
    SysGlobalCache          cache      = appl.globalCache();
    info                    info       = new info();
    xSession                session;
    UserInfo                userInfo;
    UserId                  currentUserId;
    QVS_UserLoginControl    UserLoginControl;
    Str     50              costCenter;
    int                     counter;
    int                     num = 0;
    int                     maxSessions = Info::licensedUsersTotal();
;
    currentUserId = curuserid();
    for(counter = 1; counter < maxSessions;counter++ )
    {
        session = new xSession(counter, true);
        if(session && session.userId())
        {
            select firstOnly userInfo
                where userInfo.id == session.userId();

            if (userInfo && (currentUserId == session.userId()))
            {
                num++ ;
            }
        }
    }

    costCenter = QVS_UserInfo::find(currentUserId).Dimension[2];
    select firstonly UserLoginControl
                    where UserLoginControl.Dimension[2] == costCenter
                    &&    UserLoginControl.Actived == Noyes::Yes;

    if(num > UserLoginControl.counts && UserLoginControl)
    {
        box::info(strfmt("The current user (%1) has exceeded the departments's (%2) set to the maximum extent( %3 ).",currentUserId,costCenter,numeralsToTxt_CN(UserLoginControl.counts,false,false,5)));
        cache.set(classstr(info), identifierstr(Autologoff), true);//自动注销保存当前所有操作
        info.shutDown(true);
        infolog.shutDown(true);
        return ;
    }
    if (num > 1 && !UserLoginControl)
    {

        info(strfmt("%1,%2",costCenter,num));
        box::info(strfmt("The same user %1 can't log in twice",currentUserId));
        cache.set(classstr(info), identifierstr(Autologoff), true);//自动注销保存当前所有操作
        info.shutDown(true); //
        infolog.shutDown(true);
        return;

        /*
        if(box::yesno("The same user id can't log in twice. Do you want to log in anyway? ",
                   DialogButton::Yes, "Log in", "Log out") == DialogButton::No)
        {
            infolog.shutDown(true);
        }
        */
    }

}