pipelistener.java

jxme的一些相关程序,主要是手机上程序开发以及手机和计算机通信的一些程序资料,程序编译需要Ant支持

/*
 *  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 1.10 2001/12/16 20:46:23 hamada Exp $
 */
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.ByteArrayInputStream;
import java.util.Enumeration;

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

/**
 * this application creates an instance of an inout pipe,
 * and wait for msgs on the pipe
 *
 * @author     [e-mail]
 * @created    September 24, 2001
 */

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();
    }

    /**
     * Default constructor
     */

    public PipeListener() {
    }

    /**
     * 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)
            // 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(
                    new MimeMediaType("text/xml"), is);
            is.close();
        } catch (Exception e) {
            System.out.println("failed to read/parse pipe advertisement");
            e.printStackTrace();
            System.exit(-1);
        }
    }

      /**
       * By implementing PipeMsgListener, we define this method to deal with
       * messages as they occur
       */
       
   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 
       Enumeration enum = msg.getNames();
       if ( !enum.hasMoreElements() ) {
        return;
       }
       
        // get the message element named SenderMessage 
        String senderMessage = msg.getString(SenderMessage);

        // Get message
        if (senderMessage == null) {
            System.out.println("null msg received");
        }
        System.out.println("Message: " + senderMessage);
   }

}