Refactoring work on ComponentEventListener. JM-1310 (review and testing is pending)

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10120 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/clearspace/ClearspaceMUCEventDelegate.java

 package org.jivesoftware.openfire.clearspace;
 
-import org.jivesoftware.openfire.muc.MUCEventDelegate;
 import org.jivesoftware.openfire.XMPPServer;
 import org.jivesoftware.openfire.component.InternalComponentManager;
-import org.xmpp.packet.JID;
+import org.jivesoftware.openfire.muc.MUCEventDelegate;
 import org.xmpp.packet.IQ;
-import org.xmpp.component.ComponentException;
-import org.xmpp.component.Component;
+import org.xmpp.packet.JID;
 
-import java.util.Map;
 import java.util.HashMap;
+import java.util.Map;
 
 /**
  * TODO: Comment me
@@ -33,19 +31,16 @@ public class ClearspaceMUCEventDelegate extends MUCEventDelegate {
     public Map<String, String> getRoomConfig(String roomName) {
         Map<String, String> roomConfig = new HashMap<String, String>();
 
-        // TODO: Ensure the getComponent method gets implemented.
-        Component csComponent = ClearspaceManager.getInstance().getComponent();
-
         // TODO: Get the config by connecting to CS through the component
         InternalComponentManager internalComponentManager = InternalComponentManager.getInstance();
         // TODO: Create query packet asking for the room config and in CS create a handler for that packet
         IQ query = null;
-        IQ result;
-        try {
-            result = internalComponentManager.query(csComponent, query, 15000);
-        } catch (ComponentException e) {
-            //
+        IQ result = ClearspaceManager.getInstance().query(query, 15000);
+        if (result == null) {
+            // TODO No answer was received from Clearspace so return null
+            return null;
         }
+        // TODO Check that the IQ is of type RESULT (and not ERROR) otherwise return null
 
         // TODO: Setup roomConfig based on the result packet containing config values
         JID roomJid = new JID(roomName);

src/java/org/jivesoftware/openfire/clearspace/ClearspaceManager.java

@@ -16,31 +16,33 @@ import org.apache.commons.httpclient.auth.AuthScope;
 import org.apache.commons.httpclient.methods.*;
 import org.dom4j.*;
 import org.dom4j.io.XMPPPacketReader;
+import org.jivesoftware.openfire.IQResultListener;
+import org.jivesoftware.openfire.IQRouter;
 import org.jivesoftware.openfire.XMPPServer;
 import org.jivesoftware.openfire.XMPPServerInfo;
-import org.jivesoftware.openfire.muc.spi.MultiUserChatServiceImpl;
 import org.jivesoftware.openfire.auth.AuthFactory;
 import org.jivesoftware.openfire.auth.UnauthorizedException;
 import static org.jivesoftware.openfire.clearspace.ClearspaceManager.HttpType.GET;
 import static org.jivesoftware.openfire.clearspace.ClearspaceManager.HttpType.POST;
-import org.jivesoftware.openfire.component.ExternalComponentConfiguration;
-import org.jivesoftware.openfire.component.ExternalComponentManager;
-import org.jivesoftware.openfire.component.ExternalComponentManagerListener;
+import org.jivesoftware.openfire.component.*;
 import org.jivesoftware.openfire.container.BasicModule;
 import org.jivesoftware.openfire.group.GroupNotFoundException;
+import org.jivesoftware.openfire.muc.spi.MultiUserChatServiceImpl;
 import org.jivesoftware.openfire.net.MXParser;
 import org.jivesoftware.openfire.user.UserNotFoundException;
 import org.jivesoftware.util.*;
 import org.jivesoftware.util.cache.DefaultCache;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlPullParserFactory;
+import org.xmpp.packet.IQ;
 import org.xmpp.packet.JID;
-import org.xmpp.component.Component;
 
 import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.net.*;
 import java.util.*;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
 
 
 /**
@@ -54,50 +56,25 @@ import java.util.*;
  *
  * @author Daniel Henninger
  */
-public class ClearspaceManager extends BasicModule implements ExternalComponentManagerListener {
-    private ConfigClearspaceTask configClearspaceTask;
-
-    /**
-     * Different kind of HTTP request types
-     */
-    public enum HttpType {
-
-        /**
-         * Represents an HTTP Get request. And it's equivalent to a SQL SELECTE.
-         */
-        GET,
-
-        /**
-         * Represents an HTTP Post request. And it's equivalent to a SQL UPDATE.
-         */
-        POST,
-
-        /**
-         * Represents an HTTP Delete request. And it's equivalent to a SQL DELETE.
-         */
-        DELETE,
-
-        /**
-         * Represents an HTTP Put requests.And it's equivalent to a SQL CREATE.
-         */
-        PUT
-    }
-
+public class ClearspaceManager extends BasicModule implements ExternalComponentManagerListener, ComponentEventListener {
     /**
      * This is the username of the user that Openfires uses to connect
      * to Clearspace. It is fixed a well known by Openfire and Clearspace.
      */
     private static final String OPENFIRE_USERNAME = "openfire_SHRJKZCNU53";
-
     private static final String WEBSERVICES_PATH = "rpc/rest/";
-
     protected static final String IM_URL_PREFIX = "imService/";
-
     public  static final String MUC_SUBDOMAIN = "clearspace-conference";
     private static final String MUC_DESCRIPTION = "Clearspace Conference Services";
 
     private static ThreadLocal<XMPPPacketReader> localParser = null;
     private static XmlPullParserFactory factory = null;
+    /**
+     * This map is used to transale exceptions from CS to OF
+     */
+    private static final Map<String, String> exceptionMap;
+
+    private static ClearspaceManager instance = new ClearspaceManager();
 
     static {
         try {
@@ -116,13 +93,7 @@ public class ClearspaceManager extends BasicModule implements ExternalComponentM
                 return parser;
             }
         };
-    }
-
 
-    // This map is used to transale exceptions from CS to OF
-    private static final Map<String, String> exceptionMap;
-
-    static {
         // Add a new exception map from CS to OF and it will be automatically translated.
         exceptionMap = new HashMap<String, String>();
         exceptionMap.put("com.jivesoftware.base.UserNotFoundException", "org.jivesoftware.openfire.user.UserNotFoundException");
@@ -132,8 +103,7 @@ public class ClearspaceManager extends BasicModule implements ExternalComponentM
         exceptionMap.put("org.acegisecurity.BadCredentialsException", "org.jivesoftware.openfire.auth.UnauthorizedException");
     }
 
-    private static ClearspaceManager instance = new ClearspaceManager();
-
+    private ConfigClearspaceTask configClearspaceTask;
     private Map<String, String> properties;
     private String uri;
     private String host;
@@ -141,6 +111,10 @@ public class ClearspaceManager extends BasicModule implements ExternalComponentM
     private String sharedSecret;
     private Map<String, Long> userIDCache;
     private Map<String, Long> groupIDCache;
+    /**
+     * Keep the domains of Clearspace components
+     */
+    private List<String> clearspaces = new ArrayList<String>();
 
     /**
      * Provides singleton access to an instance of the ClearspaceManager class.
@@ -412,6 +386,8 @@ public class ClearspaceManager extends BasicModule implements ExternalComponentM
             }
             // Listen for changes to external component settings
             ExternalComponentManager.addListener(this);
+            // List for registration of new components
+            InternalComponentManager.getInstance().addListener(this);
             // Set up custom clearspace MUC service
             // Create service if it doesn't exist, load if it does.
             MultiUserChatServiceImpl muc = (MultiUserChatServiceImpl)XMPPServer.getInstance().getMultiUserChatManager().getMultiUserChatService(MUC_SUBDOMAIN);
@@ -856,14 +832,77 @@ public class ClearspaceManager extends BasicModule implements ExternalComponentM
     }
 
     /**
-     * Returns the Clearspace External XMPP Component.
+     * Sends an IQ packet to the Clearspace external component and returns the IQ packet
+     * returned by CS or <tt>null</tt> if no answer was received before the specified
+     * timeout.<p>
+     *
+     * The returned packet will be handled by the server and routed to the entity that sent
+     * the original IQ packet. Since this method block and listen to the replied IQ packet
+     * then the entity that sent the original IQ packet should ignore any reply related to
+     * the originating IQ packet. 
      *
-     * @return the Clearspace External XMPP Component.
+     * @param packet IQ packet to send.
+     * @param timeout milliseconds to wait before timing out.
+     * @return IQ packet returned by Clearspace responsing the packet we sent.
      */
-    protected Component getComponent() {
-        // TODO: Implement
+    public IQ query(final IQ packet, int timeout) {
+        // Complain if FROM is empty
+        if (packet.getFrom() == null) {
+            throw new IllegalStateException("IQ packets with no FROM cannot be sent to Clearspace");
+        }
+        // If CS is not connected then return null
+        if (clearspaces.isEmpty()) {
             return null;
         }
+        // Set the target address to the IQ packet
+        // TODO Use round robin to distribute load
+        packet.setTo(clearspaces.get(0));
+        final LinkedBlockingQueue<IQ> answer = new LinkedBlockingQueue<IQ>(8);
+        final IQRouter router = XMPPServer.getInstance().getIQRouter();
+        router.addIQResultListener(packet.getID(), new IQResultListener() {
+            public void receivedAnswer(IQ packet) {
+                answer.offer(packet);
+            }
+
+            public void answerTimeout(String packetId) {
+                Log.warn("No answer from Clearspace was received for IQ stanza: " + packet);
+            }
+        });
+        XMPPServer.getInstance().getIQRouter().route(packet);
+        IQ reply = null;
+        try {
+            reply = answer.poll(timeout, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // Ignore
+        }
+        return reply;
+    }
+
+    public void componentRegistered(JID componentJID) {
+        // Do nothing
+    }
+
+    public void componentUnregistered(JID componentJID) {
+        // Remove stored information about this component
+        clearspaces.remove(componentJID.getDomain());
+    }
+
+    public void componentInfoReceived(IQ iq) {
+        // Check if it's a Clearspace component
+        boolean isClearspace = false;
+        Element childElement = iq.getChildElement();
+        for (Iterator it = childElement.elementIterator("identity"); it.hasNext();) {
+            Element identity = (Element)it.next();
+            if ("component".equals(identity.attributeValue("category")) &&
+                    "clearspace".equals(identity.attributeValue("type"))) {
+                isClearspace = true;
+            }
+        }
+        // If component is Clearspace then keep track of the component
+        if (isClearspace) {
+            clearspaces.add(iq.getFrom().getDomain());
+        }
+    }
 
     private class ConfigClearspaceTask extends TimerTask {
 
@@ -879,4 +918,30 @@ public class ClearspaceManager extends BasicModule implements ExternalComponentM
             }
         }
     }
+
+    /**
+     * Different kind of HTTP request types
+     */
+    public enum HttpType {
+
+        /**
+         * Represents an HTTP Get request. And it's equivalent to a SQL SELECTE.
+         */
+        GET,
+
+        /**
+         * Represents an HTTP Post request. And it's equivalent to a SQL UPDATE.
+         */
+        POST,
+
+        /**
+         * Represents an HTTP Delete request. And it's equivalent to a SQL DELETE.
+         */
+        DELETE,
+
+        /**
+         * Represents an HTTP Put requests.And it's equivalent to a SQL CREATE.
+         */
+        PUT
+    }
 }

src/java/org/jivesoftware/openfire/component/ComponentEventListener.java

@@ -11,14 +11,24 @@
 
 package org.jivesoftware.openfire.component;
 
-import org.xmpp.component.Component;
 import org.xmpp.packet.IQ;
 import org.xmpp.packet.JID;
 
 /**
  * Interface to listen for component events. Use the
  * {@link InternalComponentManager#addListener(ComponentEventListener)}
- * method to register for events.
+ * method to register for events.<p>
+ *
+ * The registered event will be triggered only once no matter how many
+ * times a component is physically connected to the server or to how
+ * many cluster nodes is connected. Likewise, the unregistered event
+ * will be triggered only when the last connection of the component
+ * is no longer available.<p>
+ *
+ * When running inside of a cluster each cluster node will get these
+ * event notifications. For instance, if you have a cluster of two nodes
+ * and a component connects to a node then both nodes will get the
+ * event notification. 
  *
  * @author Gaston Dombiak
  */
@@ -31,18 +41,17 @@ public interface ComponentEventListener {
      * of the server since the component has not answered the disco#info request sent
      * by the server.
      *
-     * @param component the newly added component.
      * @param componentJID address where the component can be located (e.g. search.myserver.com)
      */
-    public void componentRegistered(Component component, JID componentJID);
+    public void componentRegistered(JID componentJID);
 
     /**
-     * A component was removed.
+     * A component was removed. This means that no other cluster node has this component
+     * and this was the last connection of the component.
      *
-     * @param component the removed component.
      * @param componentJID address where the component was located (e.g. search.myserver.com)
      */
-    public void componentUnregistered(Component component, JID componentJID);
+    public void componentUnregistered(JID componentJID);
 
     /**
      * The server has received a disco#info response from the component. Once a component
@@ -50,8 +59,7 @@ public interface ComponentEventListener {
      * component to discover if service discover is supported by the component. This event
      * is triggered when the server received the response of the component.
      *
-     * @param component the component that answered the disco#info request.
      * @param iq the IQ packet with the disco#info sent by the component.
      */
-    public void componentInfoReceived(Component component, IQ iq);
+    public void componentInfoReceived(IQ iq);
 }

src/java/org/jivesoftware/openfire/component/InternalComponentManager.java

@@ -18,11 +18,15 @@ import org.jivesoftware.openfire.disco.IQDiscoItemsHandler;
 import org.jivesoftware.openfire.session.ComponentSession;
 import org.jivesoftware.util.JiveGlobals;
 import org.jivesoftware.util.Log;
+import org.jivesoftware.util.cache.CacheFactory;
 import org.xmpp.component.Component;
 import org.xmpp.component.ComponentException;
 import org.xmpp.component.ComponentManager;
 import org.xmpp.component.ComponentManagerFactory;
-import org.xmpp.packet.*;
+import org.xmpp.packet.IQ;
+import org.xmpp.packet.JID;
+import org.xmpp.packet.Packet;
+import org.xmpp.packet.Presence;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -113,6 +117,7 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
             }
             Log.debug("InternalComponentManager: Registering component for domain: " + subdomain);
             JID componentJID = new JID(subdomain + "." + serverDomain);
+            boolean notifyListeners = false;
             if (routable != null) {
                 routable.addComponent(component);
             }
@@ -120,8 +125,11 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
                 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
-                XMPPServer.getInstance().getRoutingTable().addComponentRoute(componentJID, routable);
+                routingTable.addComponentRoute(componentJID, routable);
             }
 
             // Initialize the new component
@@ -129,9 +137,11 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
                 component.initialize(componentJID, this);
                 component.start();
 
+                if (notifyListeners) {
                     // Notify listeners that a new component has been registered
-                for (ComponentEventListener listener : listeners) {
-                    listener.componentRegistered(component, componentJID);
+                    notifyComponentRegistered(componentJID);
+                    // Alert other nodes of new registered domain event
+                    CacheFactory.doClusterTask(new NotifyComponentRegistered(componentJID));
                 }
 
                 // Check for potential interested users.
@@ -162,6 +172,12 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
         }
     }
 
+    void notifyComponentRegistered(JID componentJID) {
+        for (ComponentEventListener listener : listeners) {
+            listener.componentRegistered(componentJID);
+        }
+    }
+
     /**
      * Removes a component. The {@link Component#shutdown} method will be called on the
      * component. Note that if the component was an external component that was connected
@@ -186,6 +202,9 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
      * @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);
@@ -193,31 +212,25 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
             if (routable.numberOfComponents() == 0) {
                 routables.remove(subdomain);
 
-                // Remove any info stored with the component being removed
-                componentInfo.remove(subdomain);
-
                 JID componentJID = new JID(subdomain + "." + serverDomain);
 
                 // Remove the route for the service provided by the component
-                RoutingTable routingTable = XMPPServer.getInstance().getRoutingTable();
-                if (routingTable != null) {
                 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());
                     }
-
-                // Ask the component to shutdown
-                if (component != null) {
-                    component.shutdown();
-                }
-
+                    removeComponentInfo(componentJID);
                     // Notify listeners that an existing component has been unregistered
-                for (ComponentEventListener listener : listeners) {
-                    listener.componentUnregistered(component, componentJID);
+                    notifyComponentUnregistered(componentJID);
+                    // Alert other nodes of component removed event
+                    CacheFactory.doClusterTask(new NotifyComponentUnregistered(componentJID));
                 }
                 Log.debug("InternalComponentManager: Component unregistered for domain: " + subdomain);
             }
@@ -227,6 +240,17 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
         }
     }
 
+    void notifyComponentUnregistered(JID componentJID) {
+        for (ComponentEventListener listener : listeners) {
+            listener.componentUnregistered(componentJID);
+        }
+    }
+
+    void removeComponentInfo(JID componentJID) {
+        // Remove any info stored with the component being removed
+        componentInfo.remove(componentJID.getDomain());
+    }
+
     public void sendPacket(Component component, Packet packet) {
         if (packet != null && packet.getFrom() == null) {
             throw new IllegalArgumentException("Packet with no FROM address was received from component.");
@@ -274,17 +298,13 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
     public void addListener(ComponentEventListener listener) {
         listeners.add(listener);
         // Notify the new listener about existing components
-        for (Map.Entry<String, RoutableComponents> entry : routables.entrySet()) {
-            String subdomain = entry.getKey();
-            RoutableComponents routable = entry.getValue();
-            for (Component component : routable.getComponents()) {
-                JID componentJID = new JID(subdomain + "." + serverDomain);
-                listener.componentRegistered(component, componentJID);
+        for (String domain : routingTable.getComponentsDomains()) {
+            JID componentJID = new JID(domain);
+            listener.componentRegistered(componentJID);
             // Check if there is disco#info stored for the component
-                IQ disco = componentInfo.get(subdomain);
+            IQ disco = componentInfo.get(domain);
             if (disco != null) {
-                    listener.componentInfoReceived(component, disco);
-                }
+                listener.componentInfoReceived(disco);
             }
         }
     }
@@ -514,16 +534,25 @@ public class InternalComponentManager extends BasicModule implements ComponentMa
                                     " - " + packet.toXML(), e);
                         }
                         // Store the IQ disco#info returned by the component
-                        String subdomain = packet.getFrom().getDomain().replace("." + serverDomain, "");
-                        componentInfo.put(subdomain, iq);
+                        addComponentInfo(iq);
                         // Notify listeners that a component answered the disco#info request
-                        for (ComponentEventListener listener : listeners) {
-                            listener.componentInfoReceived(component, iq);
+                        notifyComponentInfo(iq);
+                        // Alert other cluster nodes
+                        CacheFactory.doClusterTask(new NotifyComponentInfo(iq));
                     }
                 }
             }
         }
     }
+
+    void notifyComponentInfo(IQ iq) {
+        for (ComponentEventListener listener : listeners) {
+            listener.componentInfoReceived(iq);
+        }
+    }
+
+    void addComponentInfo(IQ iq) {
+        componentInfo.put(iq.getFrom().getDomain(), iq);
     }
 
     /**

src/java/org/jivesoftware/openfire/component/NotifyComponentInfo.java

+/**
+ * $RCSfile$
+ * $Revision: $
+ * $Date: $
+ *
+ * Copyright (C) 2008 Jive Software. All rights reserved.
+ *
+ * This software is published under the terms of the GNU Public License (GPL),
+ * a copy of which is included in this distribution.
+ */
+
+package org.jivesoftware.openfire.component;
+
+import org.dom4j.Element;
+import org.dom4j.tree.DefaultElement;
+import org.jivesoftware.util.cache.ClusterTask;
+import org.jivesoftware.util.cache.ExternalizableUtil;
+import org.xmpp.packet.IQ;
+
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+
+/**
+ * Task that will be executed on other cluster nodes to trigger the event that a component has
+ * send its disco#info to the server.
+ *
+ * @author Gaston Dombiak
+ */
+public class NotifyComponentInfo implements ClusterTask {
+    private IQ iq;
+
+    public NotifyComponentInfo() {
+    }
+
+    public NotifyComponentInfo(IQ iq) {
+        this.iq = iq;
+    }
+
+    public Object getResult() {
+        return null;
+    }
+
+    public void run() {
+        final InternalComponentManager manager = InternalComponentManager.getInstance();
+        manager.addComponentInfo(iq);
+        manager.notifyComponentInfo(iq);
+    }
+
+    public void writeExternal(ObjectOutput out) throws IOException {
+        ExternalizableUtil.getInstance().writeSerializable(out, (DefaultElement) iq.getElement());
+    }
+
+    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+        Element packetElement = (Element) ExternalizableUtil.getInstance().readSerializable(in);
+        iq = new IQ(packetElement, true);
+    }
+}

src/java/org/jivesoftware/openfire/component/NotifyComponentRegistered.java

+/**
+ * $RCSfile$
+ * $Revision: $
+ * $Date: $
+ *
+ * Copyright (C) 2008 Jive Software. All rights reserved.
+ *
+ * This software is published under the terms of the GNU Public License (GPL),
+ * a copy of which is included in this distribution.
+ */
+
+package org.jivesoftware.openfire.component;
+
+import org.jivesoftware.util.cache.ClusterTask;
+import org.jivesoftware.util.cache.ExternalizableUtil;
+import org.xmpp.packet.JID;
+
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+
+/**
+ * Task that will be executed on other cluster nodes to trigger the event that a component was
+ * added to a cluster node.
+ *
+ * @author Gaston Dombiak
+ */
+public class NotifyComponentRegistered implements ClusterTask {
+    private JID componentJID;
+
+    public NotifyComponentRegistered() {
+    }
+
+    public NotifyComponentRegistered(JID componentJID) {
+        this.componentJID = componentJID;
+    }
+
+    public Object getResult() {
+        return null;
+    }
+
+    public void run() {
+        InternalComponentManager.getInstance().notifyComponentRegistered(componentJID);
+    }
+
+    public void writeExternal(ObjectOutput out) throws IOException {
+        ExternalizableUtil.getInstance().writeSafeUTF(out, componentJID.toString());
+    }
+
+    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+        componentJID = new JID(ExternalizableUtil.getInstance().readSafeUTF(in));
+    }
+}

src/java/org/jivesoftware/openfire/component/NotifyComponentUnregistered.java

+/**
+ * $RCSfile$
+ * $Revision: $
+ * $Date: $
+ *
+ * Copyright (C) 2008 Jive Software. All rights reserved.
+ *
+ * This software is published under the terms of the GNU Public License (GPL),
+ * a copy of which is included in this distribution.
+ */
+
+package org.jivesoftware.openfire.component;
+
+import org.jivesoftware.util.cache.ClusterTask;
+import org.jivesoftware.util.cache.ExternalizableUtil;
+import org.xmpp.packet.JID;
+
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+
+/**
+ * Task that will be executed on other cluster nodes to trigger the event that a component was
+ * removed from a cluster node.
+ *
+ * @author Gaston Dombiak
+ */
+public class NotifyComponentUnregistered implements ClusterTask {
+    private JID componentJID;
+
+    public NotifyComponentUnregistered() {
+    }
+
+    public NotifyComponentUnregistered(JID componentJID) {
+        this.componentJID = componentJID;
+    }
+
+    public Object getResult() {
+        return null;
+    }
+
+    public void run() {
+        final InternalComponentManager manager = InternalComponentManager.getInstance();
+        manager.removeComponentInfo(componentJID);
+        manager.notifyComponentUnregistered(componentJID);
+    }
+
+    public void writeExternal(ObjectOutput out) throws IOException {
+        ExternalizableUtil.getInstance().writeSafeUTF(out, componentJID.toString());
+    }
+
+    public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+        componentJID = new JID(ExternalizableUtil.getInstance().readSafeUTF(in));
+    }
+}

src/java/org/jivesoftware/openfire/interceptor/PacketCopier.java

@@ -20,7 +20,6 @@ import org.jivesoftware.util.FastDateFormat;
 import org.jivesoftware.util.JiveConstants;
 import org.jivesoftware.util.LocaleUtils;
 import org.jivesoftware.util.Log;
-import org.xmpp.component.Component;
 import org.xmpp.packet.*;
 
 import java.util.*;
@@ -133,15 +132,15 @@ public class PacketCopier implements PacketInterceptor, ComponentEventListener {
         }
     }
 
-    public void componentInfoReceived(Component component, IQ iq) {
+    public void componentInfoReceived(IQ iq) {
         //Ignore
     }
 
-    public void componentRegistered(Component component, JID componentJID) {
+    public void componentRegistered(JID componentJID) {
         //Ignore
     }
 
-    public void componentUnregistered(Component component, JID componentJID) {
+    public void componentUnregistered(JID componentJID) {
         //Remove component from the list of subscribers (if subscribed)
         removeSubscriber(componentJID);
     }