SyncThreadPoolTest.java

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package com.sun.grizzly.util;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.CountDownLatch;

import junit.framework.TestCase;

/**
 * @author Bongjae Chang
 */
public class SyncThreadPoolTest extends TestCase {

    public static void main( String[] args ) {
        SyncThreadPoolTest test = new SyncThreadPoolTest();
        test.testIncreasingWorkerThreadForInfiniteWait();
    }

    public void testIncreasingWorkerThreadForInfiniteWait() {
        final int corePoolSize = 5;
        final int maxPoolSize = 10;
        final long keepAliveTime = 30 * 1000; // ms
        final long sleep = 100; // ms
        final long testTimeout = 5000; // ms
        final CountDownLatch latch = new CountDownLatch( maxPoolSize );

        ExecutorService executorService = new SyncThreadPool( "GrizzlyWorkerTest",
                                                                  corePoolSize,
                                                                  maxPoolSize,
                                                                  keepAliveTime,
                                                                  TimeUnit.MILLISECONDS );
        final Object[] infiniteWaitArray = new Object[maxPoolSize];
        try {
            for( int i = 0; i < maxPoolSize; i++ ) {
                infiniteWaitArray[i] = new Object();
                final Object infinteWait = infiniteWaitArray[i];
                executorService.execute( new Runnable() {
                    public void run() {
                        latch.countDown();
                        synchronized( infinteWait ) {
                            try {
                                infinteWait.wait();
                            } catch( InterruptedException e ) {
                            }
                        }
                    }
                } );
                try {
                    Thread.sleep( sleep );
                } catch( InterruptedException e ) {
                }
            }
            boolean result = false;
            try {
                result = latch.await( testTimeout, TimeUnit.MILLISECONDS );
            } catch( InterruptedException e ) {
            }
            assertTrue("Counter: " + latch.getCount(), result);
        } finally {
            for( Object infiniteWait : infiniteWaitArray ) {
                synchronized( infiniteWait ) {
                    infiniteWait.notifyAll();
                }
            }
            executorService.shutdown();
        }
    }
}