/*
*  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: PipeExample.java,v 1.16 2003/01/15 18:29:35 hamada Exp $
*/
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Date;

import net.jxta.discovery.DiscoveryService;
import net.jxta.document.AdvertisementFactory;
import net.jxta.document.MimeMediaType;
import net.jxta.endpoint.Message;
import net.jxta.endpoint.StringMessageElement;
import net.jxta.exception.PeerGroupException;
import net.jxta.peergroup.PeerGroup;
import net.jxta.peergroup.PeerGroupFactory;
import net.jxta.pipe.OutputPipe;
import net.jxta.pipe.OutputPipeEvent;
import net.jxta.pipe.OutputPipeListener;
import net.jxta.pipe.PipeService;
import net.jxta.protocol.PipeAdvertisement;
import net.jxta.rendezvous.RendezvousEvent;

/**
 *  This exapmle illustrates how to use the OutputPipeListener interface
 *
 */

public class PipeExample implements Runnable, OutputPipeListener { 

    static PeerGroup netPeerGroup = null;
    private final static String SenderMessage = "PipeListenerMsg";
    private PipeService pipe;
    private DiscoveryService discovery;
    private PipeAdvertisement pipeAdv;

    /**
     *  main
     *
     *@param  args  command line arguments
     */
    public static void main( String args[] ) {
        PipeExample myapp = new PipeExample();
        myapp.startJxta();
        myapp.run();
    }

    /**
     *  the thread which creates (resolves) the output pipe
     *  and sends a message once it's resolved
     */

    public synchronized void run() {
        try {
            // this step helps when running standalone ( local sub-net without any redezvous setup )
            discovery.getRemoteAdvertisements( null, DiscoveryService.ADV, null, null, 1, null );
            // create output pipe with asynchronously
            // Send out the first pipe resolve call
            System.out.println( "Attempting to create a OutputPipe" );
            pipe.createOutputPipe( pipeAdv, this);
        }
        catch ( IOException e ) {
            System.out.println( "OutputPipe creation failure" );
            e.printStackTrace();
            System.exit( -1 );
        }
    }


    /**
     *  by implementing OutputPipeListener we must define this method which
     *  is called when the output pipe is created
     *
     *@param  event  event object from which to get output pipe object
     */

    public void outputPipeEvent( OutputPipeEvent event ) {

        System.out.println( " Got an output pipe event" );
        OutputPipe op = event.getOutputPipe();
        Message msg = null;

        try {
            System.out.println( "Sending message" );
            msg = new Message();
            Date date = new Date(System.currentTimeMillis());
            StringMessageElement sme = new StringMessageElement(SenderMessage, date.toString() , null);
            msg.addMessageElement(null, sme);
            op.send( msg );
        } catch ( IOException e ) {
            System.out.println( "failed to send message" );
            e.printStackTrace();
            System.exit( -1 );
        }
        op.close();
        System.out.println( "message sent" );
    }

    /**
     *  Starts jxta, and get the pipe, and discovery service
     */
    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)
            // 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 );
        }

        // get the pipe service, and discovery
        pipe = netPeerGroup.getPipeService();
        discovery = netPeerGroup.getDiscoveryService();
        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 );
        }
    }
}