/*
 * Copyright (c) 2005, Stanford University. 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 Stanford University 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. 
 */

/*
 * Created on Sep 12, 2005
 * Original author: Christopher Bruns
 */
package org.simtk.isimsu;

import java.io.*;

public class ExternalProcessManager extends Thread {
    String[] commandArgs;
    File workingDirectory;
    public Exception exception = null;
    StreamReaderThread stdOutGobbler;
    StreamReaderThread stdErrGobbler;
    
    // public boolean hadAProblem = false;
    
    ExternalProcessManager(String[] command, File dir) {
        commandArgs = command;
        workingDirectory = dir;
    }
    
    public void run() {

        try {
            Process process = Runtime.getRuntime().exec(commandArgs, null, workingDirectory);

            // Capture all program output to screen
            stdOutGobbler = new StreamReaderThread(process.getInputStream());
            stdErrGobbler = new StreamReaderThread(process.getErrorStream());
            stdOutGobbler.start();
            stdErrGobbler.start();
        
            // Wait for process to end
            process.waitFor();
            stdOutGobbler.join();
            stdErrGobbler.join();
            // System.out.println(stdOutGobbler.getLog());
            // System.err.println(stdErrGobbler.getLog());
            
            if (process.exitValue() != 0) exception = new RuntimeException("Process terminated with exit value " + process.exitValue());
        }
        catch (IOException exc) {
            exception = exc;
        }
        catch (InterruptedException exc) {
            exception = exc;
        }
    }
    
    String getStdOut() {return new String(stdOutGobbler.getLog());}
    String getStdErr() {return new String(stdErrGobbler.getLog());}
}