filesender.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 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: FileSender.java,v 1.18 2004/05/01 20:05:13 bondolo Exp $
 */


package net.jxta.impl.shell.bin.xfer;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;

import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;

import net.jxta.discovery.DiscoveryService;
import net.jxta.document.MimeMediaType;
import net.jxta.endpoint.ByteArrayMessageElement;
import net.jxta.endpoint.Message;
import net.jxta.endpoint.MessageElement;
import net.jxta.endpoint.Messenger;
import net.jxta.endpoint.MessengerEvent;
import net.jxta.endpoint.MessengerEventListener;
import net.jxta.endpoint.OutgoingMessageEvent;
import net.jxta.endpoint.OutgoingMessageEventListener;
import net.jxta.endpoint.StringMessageElement;
import net.jxta.peergroup.PeerGroup;
import net.jxta.pipe.OutputPipe;
import net.jxta.pipe.OutputPipeEvent;
import net.jxta.pipe.OutputPipeListener;
import net.jxta.protocol.PipeAdvertisement;

import net.jxta.impl.shell.ShellApp;

/**
 *  send a file from one peer to another. destination may be an endpoint address
 *  or a pipe.
 *
 **/
class FileSender implements MessengerEventListener, OutputPipeListener {
    
    PeerGroup group;
    OutputPipe console;
    XferDaemon src;
    File f;
    int blockSize;
    boolean async;
    
    volatile boolean resolved = false;
    
    private class PendingMessageCounter implements OutgoingMessageEventListener {
        
        int pending = 0;
        int successes = 0;
        int failures = 0;
        
        boolean lastSuccess = false;
        
        OutgoingMessageEvent lastevent = null;
        
        /**
         *  {@inheritDoc}
         **/
        public synchronized void messageSendFailed( OutgoingMessageEvent event ) {
            lastSuccess = false;
            lastevent = event;
            pending--;
            failures++;
            notifyAll();
        }
        
        /**
         *  {@inheritDoc}
         **/
        public synchronized void messageSendSucceeded( OutgoingMessageEvent event ) {
            lastSuccess = true;
            lastevent = event;
            pending--;
            successes++;
            notifyAll();
        }
        
        public synchronized void addPending( ) {
            pending++;
        }
        
        public boolean stillPending( ) {
            return ( 0 != numPending( ) );
        }
        
        public synchronized int numPending( ) {
            return pending;
        }
        
        public boolean getLastResult( ) {
            return lastSuccess;
        }
        
        public OutgoingMessageEvent getLastEvent( ) {
            return lastevent;
        }
    }
    
    /**
     *  Constructs a file sender object. The sender will be activated by a call
     *  back to either {@link #messengerReady(MessengerEvent)} or
     * {@link #outputPipeEvent(OutputPipeEvent)}.
     **/
    FileSender( PeerGroup group, OutputPipe console, XferDaemon src, int blockSize, boolean async, File f ) {
        this.group = group;
        this.console = console;
        this.src = src;
        this.blockSize = blockSize;
        this.async = async;
        this.f = f;
    }
    
    /**
     *  {@inheritDoc}
     **/
    public boolean messengerReady( MessengerEvent event ) {
        synchronized( this ) {
            resolved = true;
            notifyAll();
        }
        
        if( null != event.getMessenger() ) {
            send( event.getMessenger(), null );
        }
        
        return true;
    }
    
    /**
     *  {@inheritDoc}
     **/
    public void outputPipeEvent( OutputPipeEvent event ) {
        boolean newResolve = !resolved;
        
        synchronized( this ) {
            group.getPipeService().removeOutputPipeListener( event.getPipeID(), this );
            resolved = true;
            notifyAll();
        }
        
        
        if( newResolve ) {
            send( null, event.getOutputPipe() );
        }
    }
    
    // Private implementations
    
    private void print( String line ) {
        ShellApp.pipePrint( console, line );
    }
    
    private void println( String line ) {
        print( line + "\n" );
    }