public static function getInstance()
 {
     if (self::$oInstance == null) {
         self::$oInstance = new self();
     }
     return self::$oInstance;
 }
<?php

require_once 'AppFacade.php';
/* grab relevant data from the environment */
/// set the action
$sAction = 'read';
if (isset($_REQUEST['sAction']) && !empty($_REQUEST['sAction'])) {
    $sAction = $_REQUEST['sAction'];
}
/// set the bpm
$iBpm = 0;
if (isset($_REQUEST['iBpm']) && !empty($_REQUEST['iBpm'])) {
    $iBpm = $_REQUEST['iBpm'];
}
/* load the AppFacade and execDjCommand().. */
$oAppFacade = AppFacade::getInstance();
$oAppFacade->execDjCommand($sAction, $iBpm);