manytomanydialog.java

jxta官方例程

/*
*  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
*  reserved.
*
*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions
*  are met:
*
*  1. Redistributions of source code must retain the above copyright
*  notice, this list of conditions and the following disclaimer.
*
*  2. Redistributions in binary form must reproduce the above copyright
*  notice, this list of conditions and the following discalimer in
*  the documentation and/or other materials provided with the
*  distribution.
*
*  3. The end-user documentation included with the redistribution,
*  if any, must include the following acknowledgment:
*  "This product includes software developed by the
*  Sun Microsystems, Inc. for Project JXTA."
*  Alternately, this acknowledgment may appear in the software itself,
*  if and wherever such third-party acknowledgments normally appear.
*
*  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
*  must not be used to endorse or promote products derived from this
*  software without prior written permission. For written
*  permission, please contact Project JXTA at http://www.jxta.org.
*
*  5. Products derived from this software may not be called "JXTA",
*  nor may "JXTA" appear in their name, without prior written
*  permission of Sun.
*
*  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
*  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
*  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
*  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
*  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
*  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
*  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*  SUCH DAMAGE.
*  ====================================================================
*
*  This software consists of voluntary contributions made by many
*  individuals on behalf of Project JXTA.  For more
*  information on Project JXTA, please see
*  <http://www.jxta.org/>.
*
*  This license is based on the BSD license adopted by the Apache Foundation.
*
*  $Id: ManyToManyDialog.java,v 1.8 2006/08/03 21:24:09 nano Exp $
*/

package net.jxta.myjxta.plugins.groupchat;

import java.io.IOException;
import java.util.EventObject;
import java.util.HashMap;
import java.util.Map;
import java.util.TimerTask;

import net.jxta.endpoint.Message;
import net.jxta.endpoint.StringMessageElement;
import net.jxta.myjxta.MyJXTA;
import net.jxta.myjxta.View;
import net.jxta.myjxta.dialog.AbstractDialog;
import net.jxta.myjxta.dialog.Dialog;
import net.jxta.myjxta.dialog.DialogKeys;
import net.jxta.myjxta.dialog.DialogManager;
import net.jxta.myjxta.dialog.DialogMessage;
import net.jxta.myjxta.dialog.DialogPipeListener;
import net.jxta.myjxta.dialog.filter.BanFilter;
import net.jxta.myjxta.dialog.filter.DirectiveFilter;
import net.jxta.myjxta.dialog.filter.EmoticonFilter;
import net.jxta.myjxta.dialog.filter.EmptyMessageFilter;
import net.jxta.myjxta.dialog.filter.EmptyMessageOrCommandFilter;
import net.jxta.myjxta.dialog.filter.HTMLNormalizerFilter;
import net.jxta.myjxta.dialog.filter.LegacyAnnounceFilter;
import net.jxta.myjxta.dialog.filter.PingPresenceFilter;
import net.jxta.myjxta.dialog.filter.URIFilter;
import net.jxta.myjxta.dialog.listener.NewDialogListener;
import net.jxta.myjxta.plugin.PluginPanel;
import net.jxta.myjxta.ui.ChatDialogPanel;
import net.jxta.myjxta.util.Env;
import net.jxta.myjxta.util.Group;
import net.jxta.myjxta.util.GroupListener;
import net.jxta.peergroup.PeerGroup;
import net.jxta.pipe.OutputPipe;
import net.jxta.pipe.PipeID;
import net.jxta.pipe.PipeService;
import net.jxta.protocol.PipeAdvertisement;
import net.jxta.util.JxtaBiDiPipe;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

/**
 * @author james todd [gonzo at jxta dot org]
 * @author mike mcangus [mcangus at jxta dot org]
 * @version $Id: ManyToManyDialog.java,v 1.8 2006/08/03 21:24:09 nano Exp $
 */

public class ManyToManyDialog
        extends AbstractDialog
        implements DialogPipeListener {

    public static final String SEQ_NR_MSGKEY = "SEQ_NR";
//    public static boolean ACTIVATE_SEQNR=System.getProperty("DEBUG_MSG_SEQ_NR","false").equalsIgnoreCase("true");
    public static boolean ACTIVATE_SEQNR = true;
    public static final String IMFREE_NAME = "";
    private static String prefix = "JxtaTalk";
    public static final DialogKeys KEYS = new DialogKeys(prefix + "SenderName", prefix + "Message",
            prefix + "SenderMessage", prefix + "GroupId", "GrpName",
            prefix + "Command");
    private static final Logger LOG = Logger.getLogger(ManyToManyDialog.class);

    /**
     * The OutputPipe on which to propagate messages
     */
    private OutputPipe pipe = null;

    /**
     * A cache of pipe we already opened
     */
    private Map<PipeAdvertisement, OutputPipe> pipeCache = null;

    /**
     * The Timer Task that sends the periodic ping signal
     */
    private TimerTask timer = null;
    private int m_lastMessageDispatchNumber = 0;
    private ChatDialogPanel dialogPanel;

    //the listener that is informed about group connected / disconnected events
    private GroupListener myGroupListener;

    static {
        DIALOG_NAME = IMFREE_NAME;
    }

    /**
     * Create a new group dialog
     *
     * @param group  the Group in which this group chat takes place
     * @param pa     The PipeAdvertisement to be used by the Dialog
     *               for joining the MyJXTA group.
     * @param myJxta the MyJXTA instance to use
     */
    public ManyToManyDialog(Group group, PipeAdvertisement pa,
                            MyJXTA myJxta) {
        super(group, pa, myJxta);
        if (LOG.isEnabledFor(Level.DEBUG)) {
            LOG.debug("Begin ManyToManyDialog(Group, PipeAdvertisement, MyJXTA) Constructor");
        }

        PeerGroup pg = getGroup().getPeerGroup();

        setDialogMessage(new DialogMessage(pg.getPeerName(), null,
                pg.getPeerGroupID().toString(), pg.getPeerGroupName(), KEYS));

        // retrieve the correct instance of the DialogManager
        DialogManager dm = DialogManager.getInstance(group,
                Dialog.getDialogNamer(ManyToManyDialog.class).
                        getDialogName(pg.getPeerName()),
                PipeService.PropagateType);

        dm.addPipeListener(pg, this);

        // Create the OutputPipe to propate messages
        OutputPipe pipe = getPipe(pa);

        // initialize the pipe
        if (pipe == null) {
            try {
                pipe = pg.getPipeService().createOutputPipe(pa, 100);

                setPipe(pa, pipe);
            } catch (IOException ioe) {
                LOG.error("Caught unexpected Exception", ioe);
            }
        } else {
            setPipe(null, pipe);
        }

        // update the DialogMessage template to report the
        // correct  PeerGroup name
        DialogMessage dmsg = getDialogMessage();

        dmsg.setLabel(dmsg.getGroupName());

        setDialogMessage(dmsg);
        addListener(new NewDialogListener(getGroup(), getMyJXTA()));
        myGroupListener=new GroupListener(){
            public void groupEvent(Group g, String s, EventObject p_sourceEvent) {
                updateConnectionState();
            }
        };
        group.addListener(myGroupListener);

        // start the timer
        //timer = new PingTask();
        //myJxta.startTimer(timer, Env.PING_INTERVAL);

        init();

        if (LOG.isEnabledFor(Level.DEBUG)) {
            LOG.debug("End   ManyToManyDialog(Group, PipeAdvertisement, MyJXTA) Constructor");
        }
    }

    private void updateConnectionState() {
        if (this.dialogPanel!=null)
            this.dialogPanel.updateConnectionState();
    }


    /**
     * close: cut all the strings attached to this Dialog.
     */
    public void close() {

        if (m_closed)
            return;
        
        if (LOG.isEnabledFor(Level.DEBUG)) {
            LOG.debug("Begin close()");
        }

        
		if (this.pipe!=null && !m_closed){
            DialogMessage goodbyeMsg=(DialogMessage) getDialogMessage().clone();
            goodbyeMsg.setCommand(GOODBYE_CMD);
            try {
            	final Group group2 = getGroup();
            	if (group2!=null){
            		final PipeID ownPeersCommandId = group2.getOwnPeersCommandId();
            		if (ownPeersCommandId!=null){
            			goodbyeMsg.addMessageElement("COMMAND_PIPE", new StringMessageElement(Dialog.IMFREE+"CommandPipe",ownPeersCommandId.toString(),null));
            		}
            	}
            } catch (Exception e){
            	//nothing 
            	//safety catch because this has been added 1 day before the 2.4 release
            }
            //goodbyeMsg.setMessage("*** has left ***");
            dispatch(goodbyeMsg);
        }

        clear();

        // close the timer task
        if (timer != null) {
            timer.cancel();
        }

        if (this.myGroupListener!=null){
            getGroup().removeListener(myGroupListener);