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/*
* Copyright (C) 2009-2010, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 THE COPYRIGHT OWNER OR
* 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.
*/
package org.eclipse.jgit.util.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.io.OutputStream;
/** Thread to copy from an input stream to an output stream. */
public class StreamCopyThread extends Thread {
private static final int BUFFER_SIZE = 1024;
private final InputStream src;
private final OutputStream dst;
private volatile boolean doFlush;
/**
* Create a thread to copy data from an input stream to an output stream.
*
* @param i
* stream to copy from. The thread terminates when this stream
* reaches EOF. The thread closes this stream before it exits.
* @param o
* stream to copy into. The destination stream is automatically
* closed when the thread terminates.
*/
public StreamCopyThread(final InputStream i, final OutputStream o) {
setName(Thread.currentThread().getName() + "-StreamCopy");
src = i;
dst = o;
}
/**
* Request the thread to flush the output stream as soon as possible.
* <p>
* This is an asynchronous request to the thread. The actual flush will
* happen at some future point in time, when the thread wakes up to process
* the request.
*/
public void flush() {
if (!doFlush) {
doFlush = true;
interrupt();
}
}
@Override
public void run() {
try {
final byte[] buf = new byte[BUFFER_SIZE];
for (;;) {
try {
if (doFlush) {
doFlush = false;
dst.flush();
}
final int n;
try {
n = src.read(buf);
} catch (InterruptedIOException wakey) {
continue;
}
if (n < 0)
break;
dst.write(buf, 0, n);
} catch (IOException e) {
break;
}
}
} finally {
try {
src.close();
} catch (IOException e) {
// Ignore IO errors on close
}
try {
dst.close();
} catch (IOException e) {
// Ignore IO errors on close
}
}
}
}
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