propogatedialogmanager.java

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/*
 *  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: PropogateDialogManager.java,v 1.5 2007/05/28 22:00:51 nano Exp $
 */

package net.jxta.myjxta.dialog;

import net.jxta.endpoint.Message;
import net.jxta.myjxta.util.PipeUtil;
import net.jxta.peergroup.PeerGroup;
import net.jxta.pipe.InputPipe;
import net.jxta.pipe.PipeMsgEvent;
import net.jxta.pipe.PipeMsgListener;
import net.jxta.protocol.PipeAdvertisement;

import java.io.IOException;
import java.util.List;

/**
 * @author james todd [gonzo at jxta dot org]
 * @version $Id: PropogateDialogManager.java,v 1.5 2007/05/28 22:00:51 nano Exp $
 */

final class PropogateDialogManager
        extends AbstractDialogManager {

    // Remember the pipe, so that we can close it.
    private InputPipe pipe = null;

    /**
     * The class the listens for  PipeMsgEvents and sends
     * the data on to all registered  DialogPipeListeners
     */
    private final class PropagatePipeListener
            implements PipeMsgListener {

        /**
         * The PeerGroup in which this listener operates
         */
        private final PeerGroup pg;

        /**
         * Create a new PropagatePipeListener object
         *
         * @param pg the PeerGroup in which this listener operates
         */
        protected PropagatePipeListener(PeerGroup pg) {
            this.pg = pg;
        }

        /**
         * Called if a new PipeMsgEvent was received
         *
         * @param pme the PipeMsgEvent that was received
         */
        public void pipeMsgEvent(PipeMsgEvent pme) {
            Message msg = pme.getMessage();

            List<DialogPipeListener> list = getListeners(pg);
            if (list != null) {
                for (Object o : list) {
                    try {
                        ((DialogPipeListener) o).receive(pg, msg);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    public PropogateDialogManager(String name, String type) {
        super(name, type);
    }

    /**
     * Initializes this DialogManager for the indicated PeerGroup
     *
     * @param pg the PeerGroup for which to initialize this DialogManager
     */
    public void initialize(final PeerGroup pg) {
        try {
            this.pipe = pg.getPipeService().createInputPipe(getPipeAdv(pg),
                    new PropagatePipeListener(pg));
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

    /**
     * { @inheritDoc }
     */
    public void close() {
        if (this.pipe != null) {
            this.pipe.close();
        }
    }

    /**
     * Get the PipeAdvertisement for the indicated PeerGroup
     *
     * @param pg the PeerGroup for which to create the advertisment
     */
    public PipeAdvertisement getPipeAdv(PeerGroup pg) {
        return PipeUtil.createAdv(pg, getDialogName(), getType(), PipeUtil.GROUP_CHAT_PIPE_ID);
    }
}