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package paraselene.gui.logic;
 
import paraselene.*;
import paraselene.ajax.*;
import java.io.*;
import java.util.*;
import javax.servlet.http.*;
 
public class Command extends Thread implements Serializable {
    public static final String KEY = "cmd";
    private String[]    cmd;
    private HttpSession    session;
    private static HashMap<Command, Command>    running =
        new HashMap<Command, Command>();
 
    public boolean    finish = false;
    public String    echo;
 
    public Command() {}
    Command( HttpSession s, String[] c ) {
        session = s;
        cmd = c;
        synchronized( running ) {
            running.put( this, this );
        }
        start();
    }
 
    public void run() {
        Command    last = new Command();
        last.finish = true;
        try {
            ProcessBuilder    pb = new ProcessBuilder( cmd );
            Process    pro = pb.redirectErrorStream( true ).start();
            BufferedReader    r = new BufferedReader(
                new InputStreamReader(
                    pro.getInputStream(),
                    System.getProperty( "file.encoding" )
                ),
                1024
            );
            while ( true ) {
                String    str = r.readLine();
                if ( str == null ) {
                    try {
                        pro.exitValue();
                    }
                    catch( Exception e ) {
                        try {
                            Thread.sleep( 200 );
                            continue;
                        }
                        catch( Exception ee ){}
                    }
                    break;
                }
                Command    data = new Command();
                data.echo = new Text( str ).toString( HTMLPart.StringMode.BODY );
                Ajax.add( session, KEY, data );
            }
            r.close();
        }
        catch( Exception ex ){
            last.echo = new Text( ex.toString() ).toString( HTMLPart.StringMode.BODY );
        }
        Ajax.add( session, KEY, last );
        synchronized( running ) {
            running.remove( this );
        }
    }
}