Openfire Android: handling PubSub Subscription request aproval

I am new to Openfire and smack, therefore I have questions regarding pubsub feature. Actually, I have created a node with setAccessModel as authorize, and setPublishModel as subscribers in android, as shown below.

PubSubManager mgr = new PubSubManager(xmpp.getConnection());
try {
    LeafNode leaf = mgr.createNode("testNode");
    ConfigureForm form = new ConfigureForm(DataForm.Type.submit);
    form.setAccessModel(AccessModel.authorize);
    form.setDeliverPayloads(true);
    form.setNotifyRetract(true);
    form.setPersistentItems(true);
    form.setPublishModel(PublishModel.subscribers);
    leaf.sendConfigurationForm(form);
} catch (SmackException.NoResponseException e) {
        e.printStackTrace();
} catch (XMPPException.XMPPErrorException e) {
        e.printStackTrace();
} catch (SmackException.NotConnectedException e) {
        e.printStackTrace();
}

My question is that when somebody wants to subscribe to above node using below code, how the owner of this node can handle the subscription request?

PubSubManager mgr = new PubSubManager(xmpp.getConnection()); // Get the node
LeafNode node = null;
try {
  node = mgr.getNode("testNode");
  node.addItemEventListener(new ItemEventCoordinator());
  node.subscribe(senderUser+"@desi.loc");
   } catch (SmackException.NoResponseException e) {
  e.printStackTrace();
   } catch (XMPPException.XMPPErrorException e) {
  e.printStackTrace();
   } catch (SmackException.NotConnectedException e) {
  e.printStackTrace();
   } class ItemEventCoordinator  implements ItemEventListener {
   @Override
   public void handlePublishedItems(ItemPublishEvent items) {
   final ItemPublishEvent itemstemp=items;
  runOnUiThread(new Runnable() {
   @Override
   public void run() {
   //stuff that updates ui
  dspySub.setText("Item: " + itemstemp.getItems());
   }
  });
   }
}

When I set form.setAccessModel(AccessModel.open) and form.setPublishModel(PublishModel.open) every thing works fine. Users can publish and subscribe easily but when AccessModel is authorize, owner don’t listen the subscription request. I am sure I don’t know how to handle subscription request listener at owner side with above piece of code. Kindly guide me.