/*
*  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 disclaimer 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 SUN MICROSYSTEMS 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: PipeListener.java,v 1.14 2003/01/15 18:29:35 hamada Exp $
*/
import java.io.FileInputStream;
import java.util.Date;

import net.jxta.document.AdvertisementFactory;
import net.jxta.document.MimeMediaType;
import net.jxta.endpoint.Message;
import net.jxta.endpoint.MessageElement;
import net.jxta.exception.PeerGroupException;
import net.jxta.peergroup.PeerGroup;
import net.jxta.peergroup.PeerGroupFactory;
import net.jxta.pipe.InputPipe;
import net.jxta.pipe.PipeMsgEvent;
import net.jxta.pipe.PipeMsgListener;
import net.jxta.pipe.PipeService;
import net.jxta.protocol.PipeAdvertisement;

/**
 * this application creates an instance of an input pipe,
 * and waits for msgs on the input pipe
 *
 */

public class PipeListener implements PipeMsgListener {

    static PeerGroup netPeerGroup = null;
    private final static String SenderMessage = "PipeListenerMsg";

    private PipeService pipe;
    private PipeAdvertisement pipeAdv;
    private InputPipe pipeIn = null;

    /**
     *  main
     *
     * @param  args  command line args
     */
    public static void main(String args[]) {

        PipeListener myapp = new PipeListener();
        myapp.startJxta();
        myapp.run();
    }

    /**
     * wait for msgs
     *
     */

    public void run() {

        try {
            // the following creates the inputpipe, and registers "this"
            // as the PipeMsgListener, when a message arrives pipeMsgEvent is called
            System.out.println("Creating input pipe");
            pipeIn = pipe.createInputPipe(pipeAdv, this);
        } catch (Exception e) {
            return;
        }
        if (pipeIn == null) {
            System.out.println(" cannot open InputPipe");
            System.exit(-1);
        }
        System.out.println("Waiting for msgs on input pipe");
    }


    /**
     * Starts jxta
     *
     */
    private void startJxta() {
        try {
            // create, and Start the default jxta NetPeerGroup
            netPeerGroup = PeerGroupFactory.newNetPeerGroup();

            // uncomment the following line if you want to start the app defined
            // the NetPeerGroup Advertisement (by default it's the shell)
            // at which case you must include jxtashell.jar in the classpath
            // in this case we want use jxta directly.

            // netPeerGroup.startApp(null);

        }
        catch (PeerGroupException e) {
            // could not instanciate the group, print the stack and exit
            System.out.println("fatal error : group creation failure");
            e.printStackTrace();
            System.exit(1);
        }

        pipe = netPeerGroup.getPipeService();
        System.out.println("Reading in pipexample.adv");
        try {
            FileInputStream is = new FileInputStream("pipexample.adv");
            pipeAdv = (PipeAdvertisement) AdvertisementFactory.newAdvertisement(MimeMediaType.XMLUTF8, is);
            is.close();
        } catch (Exception e) {
            System.out.println("failed to read/parse pipe advertisement");
            e.printStackTrace();
            System.exit(-1);
        }
    }

    /**
     * By implementing PipeMsgListener, define this method to deal with
     * messages as they arrive
     */

    public void pipeMsgEvent ( PipeMsgEvent event ) {

        Message msg=null;
        try {
            // grab the message from the event
            msg = event.getMessage();
            if (msg == null) {
                return;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }

        // get all the message elements
        Message.ElementIterator enum = msg.getMessageElements();
        if ( !enum.hasNext() ) {
            return;
        }

        // get the message element named SenderMessage
        MessageElement msgElement = msg.getMessageElement(null, SenderMessage);
        // Get message
        if (msgElement.toString() == null) {
            System.out.println("null msg received");
        } else {
            Date date = new Date(System.currentTimeMillis());
            System.out.println("Message received at :"+ date.toString());
            System.out.println("Message  created at :"+ msgElement.toString());
        }
    }

}