| /* |
| * 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 done; |
| |
| /** Lock held by flush to avoid interrupting a write. */ |
| private final Object writeLock; |
| |
| /** |
| * 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(InputStream i, OutputStream o) { |
| setName(Thread.currentThread().getName() + "-StreamCopy"); //$NON-NLS-1$ |
| src = i; |
| dst = o; |
| writeLock = new Object(); |
| } |
| |
| /** |
| * Request that the thread terminate, and wait for it. |
| * <p> |
| * This method signals to the copy thread that it should stop as soon as |
| * there is no more IO occurring. |
| * |
| * @throws java.lang.InterruptedException |
| * the calling thread was interrupted. |
| */ |
| public void halt() throws InterruptedException { |
| for (;;) { |
| join(250 /* milliseconds */); |
| if (isAlive()) { |
| done = true; |
| interrupt(); |
| } else |
| break; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void run() { |
| try { |
| final byte[] buf = new byte[BUFFER_SIZE]; |
| boolean readInterrupted = false; |
| for (;;) { |
| try { |
| if (readInterrupted) { |
| synchronized (writeLock) { |
| boolean interruptedAgain = Thread.interrupted(); |
| dst.flush(); |
| if (interruptedAgain) { |
| interrupt(); |
| } |
| } |
| readInterrupted = false; |
| } |
| |
| if (done) |
| break; |
| |
| final int n; |
| try { |
| n = src.read(buf); |
| } catch (InterruptedIOException wakey) { |
| readInterrupted = true; |
| continue; |
| } |
| if (n < 0) |
| break; |
| |
| synchronized (writeLock) { |
| boolean writeInterrupted = Thread.interrupted(); |
| dst.write(buf, 0, n); |
| if (writeInterrupted) { |
| interrupt(); |
| } |
| } |
| } 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 |
| } |
| } |
| } |
| } |