/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
* add the following below this CDDL HEADER, with the fields enclosed
* by brackets "[]" replaced with your own identifying information:
* Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
*
* Copyright 2008 Sun Microsystems, Inc.
*/
package org.opends.guitools.controlpanel.util;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
/**
* Class used to write the output and error of a given process in a printstream.
*
*/
public class ProcessReader
{
private BufferedReader reader;
private Thread readerThread;
private Throwable lastException;
private boolean interrupt;
private boolean done;
/**
* The constructor.
* @param process process whose output/error we want to write to the print
* stream.
* @param printStream the print stream.
* @param isError whether we must write the error (or the output) must be
* written to the stream.
*/
public ProcessReader(Process process, final PrintStream printStream,
boolean isError)
{
InputStream is;
if (isError)
{
is = process.getErrorStream();
}
else
{
is = process.getInputStream();
}
reader = new BufferedReader(new InputStreamReader(is));
readerThread = new Thread(new Runnable()
{
/**
* {@inheritDoc}
*/
public void run()
{
String line;
try
{
while (!interrupt && (null != (line = reader.readLine())))
{
printStream.println(line);
}
}
catch (Throwable t)
{
lastException = t;
}
done = true;
}
});
}
/**
* Starts reading the output (or error) of the process.
*
*/
public void startReading()
{
readerThread.start();
}
/**
* Interrupts the reading of the output (or error) of the process. The method
* does not return until the reading is over.
*
*/
public void interrupt()
{
interrupt = true;
while (!done)
{
try
{
readerThread.interrupt();
}
catch (Throwable t)
{
}
}
}
/**
* Returns the last exception that occurred reading the output (or the error)
* of the process.
* @return the last exception that occurred reading the output (or the error)
* of the process.
*/
public Throwable getLastException()
{
return lastException;
}
}