Runtime.getRuntime().exe() communications

Question

Hi all,
I'm currently trying to launch a large set of commands.
I've benchmark Java so: Runtime.getRuntime().exe() is as fast as ProcessBuilder().
What design pattern shall use to optimise the "concurrent time" ?
Fit listener / event model well for this application ? Do you know any example ?
Thanks you
Victor

Answer 1

Thanks you a lot..
I've found this example, it looks good :
package introduction.sample;
import java.io.IOException;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class sample2 {
ThreadPoolExecutor threadPoolExecutor = null;
     public sample2()
     super();
     threadPoolExecutor = new ThreadPoolExecutor(5,10,5,TimeUnit.MINUTES, new ArrayBlockingQueue(10));
     public static void main(String[] args) throws IOException
          sample2 s = new sample2();
          s.checkThreadPoolExecutor();
          System.out.println("I am done with calling all threads- waiting for threads to finish");
          s.threadPoolExecutor.shutdown();
          try {
               while (!s.threadPoolExecutor.awaitTermination(1000L, TimeUnit.MILLISECONDS)) {
               // awaiting termination of all the threads here.
          catch(Exception e)
               System.out.println("Exception while waiting fot threads to finish");
               s.threadPoolExecutor.shutdown();
          System.out.println("Bye bye");
     private void checkThreadPoolExecutor(){
          for(int i = 0; i <10;i++)
          testMethod(i);
          System.out.println("I am done with i:" + i + " in checkThreadPoolExec");
     private void testMethod(int i){
          TestThread thread = new TestThread(i);
          Future<Integer> future = threadPoolExecutor.submit(thread);
class TestThread implements Callable<Integer>{
     int i =0;
     String sample = null;
     public TestThread(int i)
          this.i = i;
     @Override
     public Integer call() {
          System.out.println("I am thread-"+i + "and sleeping for 1 min");
          try
               Thread.sleep(1000*5);
          }catch(InterruptedException ie){
               System.out.println("some one woke me up");
          try{
               String test = sample.substring(0,1);
          }catch(Exception e){
               throw new RuntimeException(e);
          return i;
//source: http://forums.sun.com/thread.jspa?forumID=534&threadID=5367842Edited by: phpvik on Apr 21, 2009 9:27 AM
Edited by: phpvik on Apr 21, 2009 9:35 AM
Edited by: phpvik on Apr 21, 2009 9:36 AM