/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.common.queue;
import static org.junit.Assert.*;
import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import javax.resource.spi.work.Work;
import org.junit.Test;
import org.teiid.adminapi.impl.WorkerPoolStatisticsMetadata;
import org.teiid.dqp.internal.process.ThreadReuseExecutor;
import org.teiid.dqp.internal.process.DQPCore.FutureWork;
/**
*/
public class TestThreadReuseExecutor {
@Test public void testQueuing() throws Exception {
final long SINGLE_WAIT = 50;
final int WORK_ITEMS = 10;
final int MAX_THREADS = 5;
final ThreadReuseExecutor pool = new ThreadReuseExecutor("test", MAX_THREADS); //$NON-NLS-1$
for(int i=0; i<WORK_ITEMS; i++) {
pool.execute(new FakeWorkItem(SINGLE_WAIT));
}
pool.shutdown();
pool.awaitTermination(1000, TimeUnit.MILLISECONDS);
assertTrue(pool.isTerminated());
WorkerPoolStatisticsMetadata stats = pool.getStats();
assertEquals(10, stats.getTotalCompleted());
assertEquals("Expected threads to be maxed out", MAX_THREADS, stats.getHighestActiveThreads()); //$NON-NLS-1$
}
@Test public void testThreadReuse() throws Exception {
final long SINGLE_WAIT = 50;
final long NUM_THREADS = 5;
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
for(int i=0; i<NUM_THREADS; i++) {
pool.execute(new FakeWorkItem(SINGLE_WAIT));
try {
Thread.sleep(SINGLE_WAIT*3);
} catch(InterruptedException e) {
}
}
pool.shutdown();
WorkerPoolStatisticsMetadata stats = pool.getStats();
assertEquals("Expected 1 thread for serial execution", 1, stats.getHighestActiveThreads()); //$NON-NLS-1$
pool.awaitTermination(1000, TimeUnit.MILLISECONDS);
}
@Test(expected=RejectedExecutionException.class) public void testShutdown() throws Exception {
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
pool.shutdown();
pool.execute(new FakeWorkItem(1));
}
@Test public void testScheduleCancel() throws Exception {
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
ScheduledFuture<?> future = pool.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
}
}, 0, 5, TimeUnit.MILLISECONDS);
future.cancel(true);
assertFalse(future.cancel(true));
}
@Test public void testSchedule() throws Exception {
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
final ArrayList<String> result = new ArrayList<String>();
pool.schedule(new Work() {
@Override
public void run() {
result.add("hello"); //$NON-NLS-1$
}
@Override
public void release() {
}
}, 5, TimeUnit.MILLISECONDS);
Thread.sleep(100);
pool.shutdown();
pool.awaitTermination(1000, TimeUnit.MILLISECONDS);
assertEquals(1, result.size());
}
@Test(expected=ExecutionException.class) public void testScheduleException() throws Exception {
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
ScheduledFuture<?> future = pool.schedule(new Runnable() {
@Override
public void run() {
throw new RuntimeException();
}
}, 0, TimeUnit.MILLISECONDS);
future.get();
}
/**
* Here each execution exceeds the period
*/
@Test public void testScheduleRepeated() throws Exception {
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
final ArrayList<String> result = new ArrayList<String>();
ScheduledFuture<?> future = pool.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
result.add("hello"); //$NON-NLS-1$
try {
Thread.sleep(70);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}, 0, 30, TimeUnit.MILLISECONDS);
Thread.sleep(120);
future.cancel(true);
assertTrue(result.size() < 3);
}
@Test public void testFailingWork() throws Exception {
ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 5); //$NON-NLS-1$
final AtomicInteger count = new AtomicInteger();
pool.execute(new Work() {
@Override
public void run() {
count.getAndIncrement();
throw new RuntimeException();
}
@Override
public void release() {
}
});
Thread.sleep(100);
assertEquals(1, count.get());
}
@Test public void testPriorities() throws Exception {
final ThreadReuseExecutor pool = new ThreadReuseExecutor("test", 1); //$NON-NLS-1$
FutureWork<Boolean> work1 = new FutureWork<Boolean>(new Callable<Boolean>() {
public Boolean call() throws Exception {
synchronized (pool) {
while (pool.getSubmittedCount() < 4) {
pool.wait();
}
}
return true;
}
}, 0);
final ConcurrentLinkedQueue<Integer> order = new ConcurrentLinkedQueue<Integer>();
FutureWork<Boolean> work2 = new FutureWork<Boolean>(new Callable<Boolean>() {
public Boolean call() throws Exception {
order.add(2);
return true;
}
}, 2);
FutureWork<Boolean> work3 = new FutureWork<Boolean>(new Callable<Boolean>() {
public Boolean call() throws Exception {
order.add(3);
return false;
}
}, 1);
Thread.sleep(20); //ensure a later timestamp
FutureWork<Boolean> work4 = new FutureWork<Boolean>(new Callable<Boolean>() {
public Boolean call() throws Exception {
order.add(4);
return false;
}
}, 2);
pool.execute(work1);
pool.execute(work2);
pool.execute(work3);
pool.execute(work4);
synchronized (pool) {
pool.notifyAll();
}
work1.get();
work2.get();
work3.get();
work4.get();
assertEquals(Integer.valueOf(3), order.remove());
assertEquals(Integer.valueOf(2), order.remove());
assertEquals(Integer.valueOf(4), order.remove());
}
}