public void baseCommercePushNotification( HttpServletRequest vo_request, HttpServletResposne vo_response ) throws Exception {
     String s_merchant_username = vo_request.getParameter("merchant_username");
     String s_push_notification = vo_request.getParameter("push_notification");
     // You will need to use the merchant username to retrieve the password and key from your local database
     String s_merchant_password = getMerchantPasswordFromLocalDatabase();
     String s_merchant_key = getMerchantKeyFromLocalDatabase();
     BaseCommerceClient o_client = new BaseCommerceClient( s_merchant_username, s_merchant_password, s_merchant_key );
     PushNotification o_push_notification = o_client.handlePushNotification( s_push_notification );
     // From this point, you will determine the type of notification that is being sent and handle it accordingly
     if ( o_push_notification.isNotificaionType( PushNotification.XS_PN_TYPE_ACH_CHANGE ) {
          handleACHChangeNotification( o_push_notification );
     } else if ( o_push_notification.isNotificationType( PushNotification.XS_PN_TYPE_SETTLEMENT_BATCH_CHANGE ) {
          handleSettlementBatchChange( o_push_notification );
     } 
}