/**
* 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));
}
}
}
}
}
/**
* Handles packets that includes a data form. The data form was sent using an element with name
* "x" and namespace "jabber:x:data".
*
* @param senderRole the role of the user that sent the data form.
* @param formElement the element that contains the data form specification.
* @throws ForbiddenException if the user does not have enough privileges.
* @throws ConflictException If the room was going to lose all of its owners.
*/
private void handleDataFormElement(MUCRole senderRole, Element formElement)
throws ForbiddenException, ConflictException {
DataForm completedForm = new DataForm(formElement);
switch (completedForm.getType()) {
case cancel:
// If the room was just created (i.e. is locked) and the owner cancels the configuration
// form then destroy the room
if (room.isLocked()) {
room.destroyRoom(null, null);
}
break;
case submit:
// The owner is requesting an instant room
if (completedForm.getFields().isEmpty()) {
// Do nothing
}
// The owner is requesting a reserved room or is changing the current configuration
else {
processConfigurationForm(completedForm, senderRole);
}
// If the room was locked, unlock it and send to the owner the "room is now unlocked"
// message
if (room.isLocked() && !room.isManuallyLocked()) {
room.unlock(senderRole);
}
if (!room.isDestroyed) {
// Let other cluster nodes that the room has been updated
CacheFactory.doClusterTask(new RoomUpdatedEvent(room));
}
break;
default:
Log.warn("cannot handle data form element: " + formElement.asXML());
break;
}
}
/**
* Removes a given component. Unlike {@link #removeComponent(String)} this method will just remove
* a single component instead of all components associated to the subdomain. External components
* may connect several times and register for the same subdomain. This method just removes a
* singled connection not all of them.
*
* @param subdomain the subdomain of the component's address.
* @param component specific component to remove.
*/
public void removeComponent(String subdomain, Component component) {
if (component == null) {
return;
}
synchronized (routables) {
Log.debug("InternalComponentManager: Unregistering component for domain: " + subdomain);
RoutableComponents routable = routables.get(subdomain);
routable.removeComponent(component);
if (routable.numberOfComponents() == 0) {
routables.remove(subdomain);
JID componentJID = new JID(subdomain + "." + serverDomain);
// Remove the route for the service provided by the component
routingTable.removeComponentRoute(componentJID);
// Ask the component to shutdown
component.shutdown();
if (!routingTable.hasComponentRoute(componentJID)) {
// Remove the disco item from the server for the component that is being removed
IQDiscoItemsHandler iqDiscoItemsHandler =
XMPPServer.getInstance().getIQDiscoItemsHandler();
if (iqDiscoItemsHandler != null) {
iqDiscoItemsHandler.removeComponentItem(componentJID.toBareJID());
}
removeComponentInfo(componentJID);
// Notify listeners that an existing component has been unregistered
notifyComponentUnregistered(componentJID);
// Alert other nodes of component removed event
CacheFactory.doClusterTask(new NotifyComponentUnregistered(componentJID));
}
Log.debug("InternalComponentManager: Component unregistered for domain: " + subdomain);
} else {
Log.debug("InternalComponentManager: Other components still tied to domain: " + subdomain);
}
}
}
@Override
public void addComponent(String subdomain, Component component) throws ComponentException {
synchronized (routables) {
RoutableComponents routable = routables.get(subdomain);
if (routable != null && routable.hasComponent(component)) {
// This component has already registered with this subdomain.
// TODO: Is this all we should do? Should we return an error?
return;
}
Log.debug("InternalComponentManager: Registering component for domain: " + subdomain);
JID componentJID = new JID(subdomain + "." + serverDomain);
boolean notifyListeners = false;
if (routable != null) {
routable.addComponent(component);
} else {
routable = new RoutableComponents(componentJID, component);
routables.put(subdomain, routable);
if (!routingTable.hasComponentRoute(componentJID)) {
notifyListeners = true;
}
// Add the route to the new service provided by the component
routingTable.addComponentRoute(componentJID, routable);
}
// Initialize the new component
try {
component.initialize(componentJID, this);
component.start();
if (notifyListeners) {
// Notify listeners that a new component has been registered
notifyComponentRegistered(componentJID);
// Alert other nodes of new registered domain event
CacheFactory.doClusterTask(new NotifyComponentRegistered(componentJID));
}
// Check for potential interested users.
checkPresences();
// Send a disco#info request to the new component. If the component provides information
// then it will be added to the list of discoverable server items.
checkDiscoSupport(component, componentJID);
Log.debug("InternalComponentManager: Component registered for domain: " + subdomain);
} catch (Exception e) {
// Unregister the component's domain
routable.removeComponent(component);
if (e instanceof ComponentException) {
// Rethrow the exception
throw (ComponentException) e;
}
// Rethrow the exception
throw new ComponentException(e);
} finally {
if (routable.numberOfComponents() == 0) {
// If there are no more components associated with this subdomain, remove it.
routables.remove(subdomain);
// Remove the route
XMPPServer.getInstance().getRoutingTable().removeComponentRoute(componentJID);
}
}
}
}