/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2008 Sun Microsystems, Inc.
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* Portions Copyright 2015 ForgeRock AS.
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*/
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package org.opends.guitools.controlpanel.util;
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import java.io.BufferedReader;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.PrintStream;
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/**
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* Class used to write the output and error of a given process in a printstream.
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*
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*/
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public class ProcessReader
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{
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private BufferedReader reader;
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private Thread readerThread;
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private Throwable lastException;
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private boolean interrupt;
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private boolean done;
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/**
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* The constructor.
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* @param process process whose output/error we want to write to the print
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* stream.
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* @param printStream the print stream.
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* @param isError whether we must write the error (or the output) must be
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* written to the stream.
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*/
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public ProcessReader(Process process, final PrintStream printStream,
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boolean isError)
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{
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InputStream is;
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if (isError)
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{
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is = process.getErrorStream();
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}
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else
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{
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is = process.getInputStream();
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}
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reader = new BufferedReader(new InputStreamReader(is));
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readerThread = new Thread(new Runnable()
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{
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/** {@inheritDoc} */
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public void run()
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{
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String line;
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try
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{
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while (!interrupt && (null != (line = reader.readLine())))
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{
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printStream.println(line);
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}
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}
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catch (Throwable t)
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{
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lastException = t;
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}
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done = true;
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}
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});
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}
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/**
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* Starts reading the output (or error) of the process.
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*
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*/
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public void startReading()
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{
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readerThread.start();
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}
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/**
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* Interrupts the reading of the output (or error) of the process. The method
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* does not return until the reading is over.
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*
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*/
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public void interrupt()
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{
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interrupt = true;
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while (!done)
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{
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try
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{
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readerThread.interrupt();
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}
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catch (Throwable t)
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{
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}
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}
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}
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/**
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* Returns the last exception that occurred reading the output (or the error)
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* of the process.
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* @return the last exception that occurred reading the output (or the error)
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* of the process.
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*/
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public Throwable getLastException()
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{
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return lastException;
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}
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}
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