jxtasink.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 *  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: JxtaSink.java,v 1.3 2003/09/05 06:05:54 hamada Exp $
 */
package net.jxta.test.util;

import java.io.IOException;
import java.io.InputStream;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.spi.SelectorProvider;
import java.nio.channels.ClosedChannelException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Iterator;
import java.util.Set;
import net.jxta.impl.endpoint.msgframing.WelcomeMessage;


/**
 *JxtaSink is a utility which provides a jxta data sink. it emulates a 
 * a JXTA peer by conforming with the welcome protocol.
 * it's sole purpose is to drain messages
 */
public class JxtaSink implements Runnable {
    private static final int DEFAULT_SINK_PORT = 9901;
    private InetAddress theAddress =null;
    private int port = DEFAULT_SINK_PORT;
    private Thread thread;
    private WelcomeMessage wm = null;

    public JxtaSink(InetAddress address, WelcomeMessage wm) throws Exception {
        this(address, DEFAULT_SINK_PORT, wm);
    }

    public JxtaSink(InetAddress address, int port, WelcomeMessage wm) throws Exception {
        this.theAddress = address;
        this.port = port;
        this.wm = wm;
        thread = new Thread(this,"JxtaSink on address "+address.getHostAddress()+ " port : "+port);
        thread.setDaemon(true);
        thread.start();
    }

    public void run() {
        int count = 0;
        Selector acceptSelector = null;
        ServerSocketChannel serverSoc = null;
        InetSocketAddress address = null;
        try {
            acceptSelector = SelectorProvider.provider().openSelector();
            serverSoc = ServerSocketChannel.open();
            serverSoc.configureBlocking(false);
            address = new InetSocketAddress(theAddress, port);
            System.out.println("Waiting for connections on port : "+port);
            serverSoc.socket().bind(address);
        } catch (IOException io) {
            io.printStackTrace();
        }

        SelectionKey acceptKey = null;
        try{
           acceptKey = serverSoc.register(acceptSelector,
                                 SelectionKey.OP_ACCEPT);
        } catch (ClosedChannelException cce) {
            cce.printStackTrace();
        }
        int keysAdded = 0;
        try {
        while ((keysAdded = acceptSelector.select()) > 0) {
            Set readyKeys = acceptSelector.selectedKeys();
            Iterator i = readyKeys.iterator();
            while (i.hasNext()) {
                SelectionKey sk = (SelectionKey)i.next();
                i.remove();
                ServerSocketChannel nextReady =
                    (ServerSocketChannel)sk.channel();
                System.out.println("Accepting connection :"+count++);
                Socket s = nextReady.accept().socket();
                wm.sendToStream(s.getOutputStream());
                // Drain the pipe
                drain(s.getInputStream());
                //s.close();
            }
        }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    private void drain(InputStream in) throws IOException {
        int c;
        byte[] buf = new byte[8192];
        do {
            c = in.read(buf);
            if (c == -1) {
                System.out.println("done draining the pipe");
                return;
            }
        } while (true);
    }
}