com.izforge.izpack.util.MonitorInputStream Maven / Gradle / Ivy
/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.izforge.izpack.util;
import java.io.*;
/**
* This is a grabber for stdout and stderr. It will be launched once at command execution end
* terminates if the apropriate stream runs out of data.
*
* @author Olexij Tkatchenko
*/
public class MonitorInputStream implements Runnable
{
private BufferedReader reader;
private BufferedWriter writer;
private boolean shouldStop = false;
/**
* Construct a new monitor.
*
* @param in The input to read.
* @param out The writer to write to.
*/
public MonitorInputStream(Reader in, Writer out)
{
this.reader = new BufferedReader(in);
this.writer = new BufferedWriter(out);
}
/**
* Request stopping this thread.
*/
public void doStop()
{
this.shouldStop = true;
}
/**
* {@inheritDoc}
*/
public void run()
{
try
{
String line;
while ((line = this.reader.readLine()) != null)
{
this.writer.write(line);
this.writer.newLine();
this.writer.flush();
if (this.shouldStop)
{
return;
}
}
}
catch (IOException ioe)
{
ioe.printStackTrace(System.out);
}
}
}