/*
* $Header: /home/cvs/jakarta-commons/httpclient/src/test/org/apache/commons/httpclient/server/StreamProxy.java,v 1.1.2.1 2003/12/05 21:02:52 oglueck Exp $
* $Revision: 1.1.2.1 $
* $Date: 2003/12/05 21:02:52 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2003 The Apache Software Foundation. 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 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 THE APACHE SOFTWARE FOUNDATION 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 the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.commons.httpclient.server;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Pipes all data of an input stream through to an output stream asynchronously.
* Instances of this class are thread safe.
*
* @author Ortwin Glueck
*/
class StreamProxy {
private InputStream in;
private OutputStream out;
private Pump pump = new Pump();
private Thread pumpThread = new Thread(pump, "Stream copier");
private int state = 0;
public StreamProxy(InputStream in, OutputStream out) {
this.in = in;
this.out = out;
}
public synchronized void start() {
if (state != 0) throw new IllegalStateException("Can not start again.");
state = 1;
pumpThread.start();
}
/**
* Returns immediately. The object must not be used again.
*/
public void abort() {
if (state != 1) return;
state = 2;
pumpThread.interrupt();
dispose();
}
/**
* Blocks until all data has been copied. Basically calls the
* join method on the pump thread.
* @throws InterruptedException
*/
public void block() throws InterruptedException {
if (state != 1) throw new IllegalStateException("Can not block before started");
pumpThread.join();
}
private void dispose() {
pumpThread = null;
pump = null;
in = null;
out = null;
}
private class Pump implements Runnable {
public void run() {
byte[] buffer = new byte[10000];
try {
while (!Thread.interrupted()) {
int len;
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
out.flush();
}
}
} catch(IOException e) {
/* expected if parties close connection */
e.printStackTrace();
} finally {
dispose();
}
}
}
}
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