org.jivesoftware.smackx.PEPManager Maven / Gradle / Ivy

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Smack is an Open Source XMPP (Jabber) client library for instant messaging and presence. This library provides the client side functionality as specified in the core XMPP specifications as related to the client side of said specifications.
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/**
 * $RCSfile: PEPManager.java,v $
 * $Revision: 1.4 $
 * $Date: 2007/11/06 21:43:40 $
 *
 * Copyright 2003-2007 Jive Software.
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jivesoftware.smackx;

import java.util.ArrayList;
import java.util.List;

import org.jivesoftware.smack.PacketListener;
import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.filter.PacketExtensionFilter;
import org.jivesoftware.smack.filter.PacketFilter;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Packet;
import org.jivesoftware.smack.packet.IQ.Type;
import org.jivesoftware.smackx.packet.PEPEvent;
import org.jivesoftware.smackx.packet.PEPItem;
import org.jivesoftware.smackx.packet.PEPPubSub;

/**
 *
 * Manages Personal Event Publishing (XEP-163). A PEPManager provides a high level access to
 * pubsub personal events. It also provides an easy way
 * to hook up custom logic when events are received from another XMPP client through PEPListeners.
 * 
 * Use example:
 * 
 *  *   PEPManager pepManager = new PEPManager(smackConnection);
 *   pepManager.addPEPListener(new PEPListener() {
 *       public void eventReceived(String inFrom, PEPEvent inEvent) {
 *           LOGGER.debug("Event received: " + inEvent);
 *       }
 *   });
 *
 *   PEPProvider pepProvider = new PEPProvider();
 *   pepProvider.registerPEPParserExtension("http://jabber.org/protocol/tune", new TuneProvider());
 *   ProviderManager.getInstance().addExtensionProvider("event", "http://jabber.org/protocol/pubsub#event", pepProvider);
 *   
 *   Tune tune = new Tune("jeff", "1", "CD", "My Title", "My Track");
 *   pepManager.publish(tune);
 * 
 * 
 * @author Jeff Williams
 */
public class PEPManager {

    private List pepListeners = new ArrayList();

    private Connection connection;

    private PacketFilter packetFilter = new PacketExtensionFilter("event", "http://jabber.org/protocol/pubsub#event");
    private PacketListener packetListener;

    /**
     * Creates a new PEP exchange manager.
     *
     * @param connection a Connection which is used to send and receive messages.
     */
    public PEPManager(Connection connection) {
        this.connection = connection;
        init();
    }

    /**
     * Adds a listener to PEPs. The listener will be fired anytime PEP events
     * are received from remote XMPP clients.
     *
     * @param pepListener a roster exchange listener.
     */
    public void addPEPListener(PEPListener pepListener) {
        synchronized (pepListeners) {
            if (!pepListeners.contains(pepListener)) {
                pepListeners.add(pepListener);
            }
        }
    }

    /**
     * Removes a listener from PEP events.
     *
     * @param pepListener a roster exchange listener.
     */
    public void removePEPListener(PEPListener pepListener) {
        synchronized (pepListeners) {
            pepListeners.remove(pepListener);
        }
    }

    /**
     * Publish an event.
     * 
     * @param item the item to publish.
     */
    public void publish(PEPItem item) {
        // Create a new message to publish the event.
        PEPPubSub pubSub = new PEPPubSub(item);
        pubSub.setType(Type.SET);
        //pubSub.setFrom(connection.getUser());
 
        // Send the message that contains the roster
        connection.sendPacket(pubSub);
    }

    /**
     * Fires roster exchange listeners.
     */
    private void firePEPListeners(String from, PEPEvent event) {
        PEPListener[] listeners = null;
        synchronized (pepListeners) {
            listeners = new PEPListener[pepListeners.size()];
            pepListeners.toArray(listeners);
        }
        for (int i = 0; i < listeners.length; i++) {
            listeners[i].eventReceived(from, event);
        }
    }

    private void init() {
        // Listens for all roster exchange packets and fire the roster exchange listeners.
        packetListener = new PacketListener() {
            public void processPacket(Packet packet) {
                Message message = (Message) packet;
                PEPEvent event = (PEPEvent) message.getExtension("event", "http://jabber.org/protocol/pubsub#event");
                // Fire event for roster exchange listeners
                firePEPListeners(message.getFrom(), event);
            };

        };
        connection.addPacketListener(packetListener, packetFilter);
    }

    public void destroy() {
        if (connection != null)
            connection.removePacketListener(packetListener);

    }

    protected void finalize() throws Throwable {
        destroy();
        super.finalize();
    }
}