/**
  * Processes packets that were sent to this service. Currently only packets that were sent from
  * registered components are being processed. In the future, we may also process packet of trusted
  * clients. Trusted clients may be able to execute ad-hoc commands such as adding or removing
  * components.
  *
  * @param packet the packet to process.
  */
 @Override
 public void process(Packet packet) throws PacketException {
   List<Component> components = getComponents(packet.getFrom());
   // Only process packets that were sent by registered components
   if (!components.isEmpty()) {
     if (packet instanceof IQ && IQ.Type.result == ((IQ) packet).getType()) {
       IQ iq = (IQ) packet;
       Element childElement = iq.getChildElement();
       if (childElement != null) {
         String namespace = childElement.getNamespaceURI();
         if ("http://jabber.org/protocol/disco#info".equals(namespace)) {
           // Add a disco item to the server for the component that supports disco
           Element identity = childElement.element("identity");
           if (identity == null) {
             // Do nothing since there are no identities in the disco#info packet
             return;
           }
           try {
             XMPPServer.getInstance()
                 .getIQDiscoItemsHandler()
                 .addComponentItem(packet.getFrom().toBareJID(), identity.attributeValue("name"));
             for (Component component : components) {
               if (component instanceof ComponentSession.ExternalComponent) {
                 ComponentSession.ExternalComponent externalComponent =
                     (ComponentSession.ExternalComponent) component;
                 externalComponent.setName(identity.attributeValue("name"));
                 externalComponent.setType(identity.attributeValue("type"));
                 externalComponent.setCategory(identity.attributeValue("category"));
               }
             }
           } catch (Exception e) {
             Log.error(
                 "Error processing disco packet of components: "
                     + components
                     + " - "
                     + packet.toXML(),
                 e);
           }
           // Store the IQ disco#info returned by the component
           addComponentInfo(iq);
           // Notify listeners that a component answered the disco#info request
           notifyComponentInfo(iq);
           // Alert other cluster nodes
           CacheFactory.doClusterTask(new NotifyComponentInfo(iq));
         }
       }
     }
   }
 }
 public void run() {
   final InternalComponentManager manager = InternalComponentManager.getInstance();
   manager.addComponentInfo(iq);
   manager.notifyComponentInfo(iq);
 }