While capturing local system stats I needed a way to run parallel captures The code below is still a work in progress how to can/will be done, more on that is explained below.
For example: I am trying to capture CPU, Mem every second, but at the same I am also capturing my db response time with a real query that takes 10+ seconds. In the example above both captures CPU Mem & DB response need to run at the same time but may and will complete in different intervals. In such a case I will have to use the ExecutorService module. I am still working out the details. Note: The below url’s wil be replaced by process once completed.

package dualrun;

import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 *
 * @author Eli Kleinman
 */
public class DualRun {

    private static final int MYTHREADS = 1;

    public static void main(String[] args) throws Exception {
        ExecutorService executor = Executors.newFixedThreadPool(MYTHREADS);
        String[] hostList = {"http://url1.com", "http://url2.com",
            "http://url3.com", "http://url4.com",
            "http://url5.com"};
        for (int i = 0; i < hostList.length; i++) {

            String url = hostList[i];
            Runnable worker = new MyRunnable(url);
            executor.execute(worker);
        }
        executor.shutdown();
        // Wait until all threads are finish
        while (!executor.isTerminated()) {

        }
        System.out.println("\nFinished all threads");
    }

    public static class MyRunnable implements Runnable {

        private final String url;

        MyRunnable(String url) {
            this.url = url;
        }

        @Override
        public void run() {

            String result = "";
            int code = 200;            
            try {
                URL siteURL = new URL(url);
                HttpURLConnection connection = (HttpURLConnection) siteURL
                        .openConnection();
                connection.setRequestMethod("GET");
                connection.connect();

                code = connection.getResponseCode();
                
                if (code == 200) {
                    System.out.println("code: "+code);
                    result = "Green\t";
                } else {
                }
            } catch (Exception e) {
                System.out.println("code: empty");
                result = "->Red<-\t";
            }
            System.out.println(url + "\t\tStatus:" + result);
        }
    }

}