BoundedExecutorServiceDriver.java

package winstone;

import junit.framework.TestCase;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @author Kohsuke Kawaguchi
 */
public class BoundedExecutorServiceDriver extends TestCase {
    public static void main(String[] args) throws Exception {
        ExecutorService es = new ThreadPoolExecutor(2, Integer.MAX_VALUE,
                5L, TimeUnit.SECONDS, // idle thread will only hang around for 60 secs
                new SynchronousQueue<Runnable>(),
                new ThreadFactory() {
                    private int threadIndex;
                    public synchronized Thread newThread(Runnable r) {
                        String threadName = Launcher.RESOURCES.getString(
                                "RequestHandlerThread.ThreadName", "" + (++threadIndex));
                
                        // allocate a thread to run on this object
                        Thread thread = new Thread(r, threadName);
                        thread.setDaemon(true);
                        return thread;
                    }
                });
        BoundedExecutorService bes = new BoundedExecutorService(es,5);
        
        for (int i=0; i<20; i++) {
            final int n = i;
            bes.submit(new Runnable() {
                public void run() {
                    try {
                        System.out.println("#"+n+" started");
                        Thread.sleep(1000);
                        System.out.println("#"+n+" stopped");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            });
            Thread.sleep(100);
        }
        
        Thread.sleep(100000);
    }
}