/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
 * 
 * ludovic.apvrille AT enst.fr
 * 
 * This software is a computer program whose purpose is to allow the
 * edition of TURTLE analysis, design and deployment diagrams, to
 * allow the generation of RT-LOTOS or Java code from this diagram,
 * and at last to allow the analysis of formal validation traces
 * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
 * from INRIA Rhone-Alpes.
 * 
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 * 
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 * 
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 * 
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 */




package myutil;


import java.io.BufferedReader;
import java.io.InputStreamReader;


/**
 * Class ProcessThread
 * For execution of processes
 * Creation: 2005
 * @version 1.1 08/03/2005
 * @author Ludovic APVRILLE
 */
public class ProcessThread extends Thread {
    private String cmd;
    private MasterProcessInterface mpi;
    BufferedReader proc_in, proc_err;
    private Process proc;
    private boolean isStarted = false;
    private boolean go = true;
    private ErrorThread et;
    
    
    public ProcessThread(String _cmd, MasterProcessInterface _mpi) {
        cmd = _cmd;
        mpi = _mpi;
    }
    
    public boolean isStarted() {
        return isStarted;
    }
    
    public void stopProcess() {
        go = false;
        proc.destroy();
        proc_in = null;
        if (et != null) {
            et.stopProcess();
        }
    }
    
    public void run() {
        isStarted = true;
        System.out.println("Starting process for command " + cmd);
        proc = null;
        //BufferedReader in = null;
        String str = null;
        //PrintStream out = null;
        
        try {
            System.out.println("Going to start command " + cmd);
            
            proc = Runtime.getRuntime().exec(cmd);
            
            proc_in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
            proc_err = new BufferedReader(new InputStreamReader(proc.getErrorStream()));
            
            et = new ErrorThread(proc_err, mpi);
            et.start();
            
            while ( ((str = proc_in.readLine()) != null)  && (go == true) && (mpi.hasToContinue())){    
                System.out.println("Out " + str);
                mpi.appendOut(str+"\n");             
            }
            
            et.stopProcess();
            
        } catch (Exception e) {
            System.out.println("Exception [" + e.getMessage() + "] occurred when executing " + cmd);
        }
        System.out.println("Ending command " + cmd);
        
        if (proc != null) {
            proc.destroy();
        }
        
        isStarted = false;
        
    }
}