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VirtualThreadsManagedExecutorServiceTest.java
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VirtualThreadsManagedExecutorServiceTest.java
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/*
* Copyright (c) 2023 Contributors to the Eclipse Foundation
* Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.enterprise.concurrent.test.virtualthreads;
import static java.lang.System.Logger.Level.INFO;
import org.glassfish.enterprise.concurrent.*;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.enterprise.concurrent.ManagedExecutorService;
import org.glassfish.enterprise.concurrent.AbstractManagedExecutorService.RejectPolicy;
import org.glassfish.enterprise.concurrent.spi.ContextSetupProvider;
import org.glassfish.enterprise.concurrent.test.BlockingRunnableImpl;
import org.glassfish.enterprise.concurrent.test.ManagedBlockingRunnableTask;
import org.glassfish.enterprise.concurrent.test.ManagedTaskListenerImpl;
import org.glassfish.enterprise.concurrent.test.RunnableImpl;
import org.glassfish.enterprise.concurrent.test.TestContextService;
import org.glassfish.enterprise.concurrent.test.Util;
import org.glassfish.enterprise.concurrent.test.Util.BooleanValueProducer;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.time.Duration;
import java.util.concurrent.ExecutorService;
import org.glassfish.enterprise.concurrent.virtualthreads.VirtualThreadsManagedExecutorService;
import org.glassfish.enterprise.concurrent.virtualthreads.VirtualThreadsManagedThreadFactory;
import org.junit.Test;
/**
* Tests for Life cycle APIs in VirtualThreadsManagedExecutorService
*
*/
public class VirtualThreadsManagedExecutorServiceTest {
System.Logger logger = System.getLogger(this.getClass().getName());
/**
* Test for shutdown and isShutdown to verify that we do not regress Java SE ExecutorService functionality
*/
@Test
public void testShutdown() {
ManagedExecutorService mes
= createManagedExecutor("testShutdown", null);
assertFalse(mes.isShutdown());
mes.shutdown();
assertTrue(mes.isShutdown());
}
/**
* Verifies that when the executor is shut down using shutdownNow() - all submitted tasks are cancelled if not
* running, and - all running task threads are interrupted, and - all registered ManagedTaskListeners are invoked
*
*
*/
@Test
public void testShutdownNow_tasks_behavior() throws InterruptedException, InterruptedException {
ManagedExecutorService mes
= createManagedExecutor("testShutdown_tasks_behavior", 2, 2); // max tasks=2, queue=2
ManagedTaskListenerImpl listener1 = new ManagedTaskListenerImpl();
final BlockingRunnableImpl task1 = new ManagedBlockingRunnableTask(listener1, 0L);
Future f1 = mes.submit(task1); // this task should be run
ManagedTaskListenerImpl listener2 = new ManagedTaskListenerImpl();
BlockingRunnableImpl task2 = new ManagedBlockingRunnableTask(listener2, 0L);
Future f2 = mes.submit(task2); // this task should be queued
ManagedTaskListenerImpl listener3 = new ManagedTaskListenerImpl();
BlockingRunnableImpl task3 = new ManagedBlockingRunnableTask(listener3, 0L);
Future f3 = mes.submit(task3); // this task should be queued
// waits for task1 to start
Util.waitForTaskStarted(f1, listener1, getLoggerName());
mes.shutdownNow();
// task2 and task3 should be cancelled
Util.waitForTaskAborted(f2, listener2, getLoggerName());
assertTrue(f2.isCancelled());
assertTrue(listener2.eventCalled(f2, ManagedTaskListenerImpl.ABORTED));
Util.waitForTaskAborted(f3, listener3, getLoggerName());
assertTrue(f3.isCancelled());
assertTrue(listener3.eventCalled(f3, ManagedTaskListenerImpl.ABORTED));
// task1 should be interrupted
Util.waitForBoolean(
new Util.BooleanValueProducer() {
public boolean getValue() {
return task1.isInterrupted();
}
}, true, getLoggerName());
assertTrue(task1.isInterrupted());
}
@Test
public void testMaxParallelTasks_limitation() throws InterruptedException {
ManagedExecutorService mes
= createManagedExecutor("testShutdown_tasks_behavior", 2, 2); // max tasks=2, queue=2
ManagedTaskListenerImpl listener1 = new ManagedTaskListenerImpl();
final BlockingRunnableImpl task1 = new ManagedBlockingRunnableTask(listener1, 5000L);
Future f1 = mes.submit(task1); // this task should be run
ManagedTaskListenerImpl listener2 = new ManagedTaskListenerImpl();
BlockingRunnableImpl task2 = new ManagedBlockingRunnableTask(listener2, 5000L);
Future f2 = mes.submit(task2); // this task should be queued
System.out.println("Waiting for start");
// waits for task1 to start
Util.waitForTaskStarted(f1, listener1, getLoggerName());
Util.waitForTaskStarted(f2, listener2, getLoggerName());
System.out.println("Started");
ManagedTaskListenerImpl listener3 = new ManagedTaskListenerImpl();
BlockingRunnableImpl task3 = new ManagedBlockingRunnableTask(listener3, 5000L);
Future f3 = mes.submit(task3); // this task should be queued
Thread.sleep(Duration.ofSeconds(1));
// task3 should wait with starting while the other 2 tasks are running
System.out.println("Assertion");
assertFalse(listener3.eventCalled(f3, ManagedTaskListenerImpl.STARTING));
assertFalse(f1.isDone());
assertFalse(f2.isDone());
// tasks should complete successfully
Util.waitForTaskComplete(task1, getLoggerName());
Util.waitForTaskComplete(task2, getLoggerName());
Util.waitForTaskComplete(task3, getLoggerName());
assertTrue(f1.isDone());
assertTrue(f2.isDone());
assertTrue(f3.isDone());
}
/**
* Test for shutdownNow to verify that we do not regress Java SE ExecutorService functionality
*/
@Test
public void testShutdownNow() {
ManagedExecutorService mes
= createManagedExecutor("testShutdownNow", null);
assertFalse(mes.isShutdown());
List<Runnable> tasks = mes.shutdownNow();
assertTrue(tasks.isEmpty());
assertTrue(mes.isShutdown());
assertTrue(mes.isTerminated());
}
/**
* Test for shutdownNow with unfinished task to verify that we do not regress Java SE ExecutorService functionality
*/
@Test
public void testShutdownNow_unfinishedTask() {
ManagedExecutorService mes
= createManagedExecutor("testShutdown_unfinishedTask", null);
assertFalse(mes.isShutdown());
ManagedTaskListenerImpl listener = new ManagedTaskListenerImpl();
BlockingRunnableImpl task1 = new ManagedBlockingRunnableTask(listener, 0L);
Future f = mes.submit(task1);
// waits for task to start
Util.waitForTaskStarted(f, listener, getLoggerName());
RunnableImpl task2 = new RunnableImpl(null);
mes.submit(task2); // this task cannot start until task1 has finished
List<Runnable> tasks = mes.shutdownNow();
assertFalse(mes.isTerminated());
assertTrue(tasks.size() > 0);
task1.stopBlocking();
assertTrue(mes.isShutdown());
}
/**
* Test for awaitsTermination with unfinished task to verify that we do not regress Java SE ExecutorService
* functionality
*/
@Test
public void testAwaitsTermination() throws Exception {
ManagedExecutorService mes
= createManagedExecutor("testAwaitsTermination", null);
assertFalse(mes.isShutdown());
ManagedTaskListenerImpl listener = new ManagedTaskListenerImpl();
BlockingRunnableImpl task = new ManagedBlockingRunnableTask(listener, 0L);
Future f = mes.submit(task);
// waits for task to start
Util.waitForTaskStarted(f, listener, getLoggerName());
mes.shutdown();
try {
assertFalse(mes.awaitTermination(1, TimeUnit.SECONDS));
} catch (InterruptedException ex) {
Logger.getLogger(VirtualThreadsManagedExecutorServiceTest.class.getName()).log(Level.SEVERE, null, ex);
}
task.stopBlocking();
try {
assertTrue(mes.awaitTermination(10, TimeUnit.SECONDS));
} catch (InterruptedException ex) {
Logger.getLogger(VirtualThreadsManagedExecutorServiceTest.class.getName()).log(Level.SEVERE, null, ex);
}
assertTrue(mes.isTerminated());
}
@Test
public void testQueueCreation() throws Exception {
// Case 1: corePoolSize of 0, queue size of Integer.MAX_VALUE
// A SynchronousQueue should be created
VirtualThreadsManagedExecutorServiceExt mes1 = createManagedExecutor("mes1", 1, Integer.MAX_VALUE);
BlockingQueue<Runnable> queue = getQueue(mes1);
assertTrue(queue instanceof SynchronousQueue);
assertEquals(0, queue.remainingCapacity());
// Case 2: corePoolSize of non-zero, queue size of Integer.MAX_VALUE
// An unbounded queue should be created
VirtualThreadsManagedExecutorServiceExt mes2 = createManagedExecutor("mes2", 1, Integer.MAX_VALUE);
queue = getQueue(mes2);
assertEquals(Integer.MAX_VALUE, queue.remainingCapacity());
// Case 3: queue size of 0, A SynchronousQueue should be created
VirtualThreadsManagedExecutorServiceExt mes3 = createManagedExecutor("mes3", 1, 0);
queue = getQueue(mes3);
assertTrue(queue instanceof SynchronousQueue);
assertEquals(0, queue.remainingCapacity());
// Case 4: queue size not 0 or Integer.MAX_VALUE,
// A queue with specified capacity should be created
final int QUEUE_SIZE = 1234;
VirtualThreadsManagedExecutorServiceExt mes4 = createManagedExecutor("mes4", 1, QUEUE_SIZE);
queue = getQueue(mes4);
assertEquals(QUEUE_SIZE, queue.remainingCapacity());
VirtualThreadsManagedExecutorServiceExt mes5 = createManagedExecutor("mes5", 10, QUEUE_SIZE);
queue = getQueue(mes5);
assertEquals(QUEUE_SIZE, queue.remainingCapacity());
}
@Test
public void testConstructorWithGivenQueue() {
final int QUEUE_SIZE = 8765;
BlockingQueue<Runnable> queue = new ArrayBlockingQueue<>(QUEUE_SIZE);
VirtualThreadsManagedExecutorServiceExt mes
= new VirtualThreadsManagedExecutorServiceExt("mes", null, 0, false,
10, new TestContextService(null), RejectPolicy.ABORT,
queue);
assertEquals(queue, getQueue(mes));
assertEquals(QUEUE_SIZE, getQueue(mes).remainingCapacity());
}
@Test
public void testTaskCounters() {
final AbstractManagedExecutorService mes
= (AbstractManagedExecutorService) createManagedExecutor("testTaskCounters", null);
assertEquals(0, mes.getTaskCount());
assertEquals(0, mes.getCompletedTaskCount());
RunnableImpl task = new RunnableImpl(null);
Future future = mes.submit(task);
try {
future.get();
} catch (InterruptedException | ExecutionException ex) {
Logger.getLogger(ManagedExecutorServiceAdapterTest.class.getName()).log(Level.SEVERE, null, ex);
}
assertTrue(future.isDone());
Util.waitForBoolean(new BooleanValueProducer() {
@Override
public boolean getValue() {
return (mes.getTaskCount() > 0) && (mes.getCompletedTaskCount() > 0);
}
},
true, getLoggerName()
);
assertEquals(1, mes.getTaskCount());
assertEquals(1, mes.getCompletedTaskCount());
}
@Test
public void testThreadLifeTime() {
final AbstractManagedExecutorService mes
= createManagedExecutor("testThreadLifeTime",
2, 0, 3L, 0L, false);
Collection<Thread> threads = mes.getThreads();
assertNull(threads);
RunnableImpl runnable = new RunnableImpl(null);
Future f = mes.submit(runnable);
try {
f.get();
} catch (Exception ex) {
Logger.getLogger(VirtualThreadsManagedExecutorServiceTest.class.getName()).log(Level.SEVERE, null, ex);
}
threads = mes.getThreads();
assertEquals(1, threads.size());
logger.log(INFO, "Waiting for threads to expire due to threadLifeTime");
Util.waitForBoolean(new BooleanValueProducer() {
public boolean getValue() {
// wait for all threads get expired
return mes.getThreads() == null;
}
}, true, getLoggerName());
}
@Test
public void testHungThreads() {
final AbstractManagedExecutorService mes
= createManagedExecutor("testThreadLifeTime",
2, 0, 0L, 1L, false);
Collection<Thread> threads = mes.getHungThreads();
assertNull(threads);
BlockingRunnableImpl runnable = new BlockingRunnableImpl(null, 0L);
Future f = mes.submit(runnable);
try {
Thread.sleep(1000); // sleep for 1 second
} catch (InterruptedException ex) {
}
// should get one hung thread
threads = mes.getHungThreads();
assertEquals(1, threads.size());
// tell task to stop waiting
runnable.stopBlocking();
Util.waitForTaskComplete(runnable, getLoggerName());
// should not have any more hung threads
threads = mes.getHungThreads();
assertNull(threads);
}
@Test
public void testHungThreads_LongRunningTasks() {
final AbstractManagedExecutorService mes
= createManagedExecutor("testThreadLifeTime",
2, 0, 0L, 1L, true);
Collection<Thread> threads = mes.getHungThreads();
assertNull(threads);
BlockingRunnableImpl runnable = new BlockingRunnableImpl(null, 0L);
Future f = mes.submit(runnable);
try {
Thread.sleep(1000); // sleep for 1 second
} catch (InterruptedException ex) {
}
// should not get any hung thread because longRunningTasks is true
threads = mes.getHungThreads();
assertNull(threads);
// tell task to stop waiting
runnable.stopBlocking();
Util.waitForTaskComplete(runnable, getLoggerName());
// should not have any more hung threads
threads = mes.getHungThreads();
assertNull(threads);
}
protected VirtualThreadsManagedExecutorServiceExt createManagedExecutor(String name,
ContextSetupProvider contextCallback) {
return new VirtualThreadsManagedExecutorServiceExt(name, new VirtualThreadsManagedThreadFactory(name),
0, false,
1,
Integer.MAX_VALUE,
new TestContextService(contextCallback),
RejectPolicy.ABORT);
}
protected VirtualThreadsManagedExecutorServiceExt createManagedExecutor(String name, int maxParallelTasks, int queueSize) {
return createManagedExecutor(name, maxParallelTasks,
queueSize, 0L, 0L, false);
}
protected VirtualThreadsManagedExecutorServiceExt createManagedExecutor(String name,
int maxParallelTasks, int queueSize, long threadLifeTime,
long hungTask, boolean longRunningTasks) {
return new VirtualThreadsManagedExecutorServiceExt(name, new VirtualThreadsManagedThreadFactory(name),
hungTask, longRunningTasks,
maxParallelTasks,
queueSize,
new TestContextService(null),
RejectPolicy.ABORT);
}
BlockingQueue<Runnable> getQueue(VirtualThreadsManagedExecutorServiceExt mes) {
ThreadPoolExecutor executor = (ThreadPoolExecutor) mes.getThreadPoolExecutor();
return executor.getQueue();
}
public String getLoggerName() {
return VirtualThreadsManagedExecutorServiceTest.class.getName();
}
public static class VirtualThreadsManagedExecutorServiceExt extends VirtualThreadsManagedExecutorService {
public VirtualThreadsManagedExecutorServiceExt(String name, VirtualThreadsManagedThreadFactory managedThreadFactory, long hungTaskThreshold, boolean longRunningTasks, int maxParallelTasks, ContextServiceImpl contextService, RejectPolicy rejectPolicy, BlockingQueue<Runnable> queue) {
super(name, managedThreadFactory, hungTaskThreshold, longRunningTasks, maxParallelTasks, contextService, rejectPolicy, queue);
}
public VirtualThreadsManagedExecutorServiceExt(String name, VirtualThreadsManagedThreadFactory managedThreadFactory, long hungTaskThreshold, boolean longRunningTasks, int maxParallelTasks, int queueCapacity, ContextServiceImpl contextService, RejectPolicy rejectPolicy) {
super(name, managedThreadFactory, hungTaskThreshold, longRunningTasks, maxParallelTasks, queueCapacity, contextService, rejectPolicy);
}
@Override
public ExecutorService getThreadPoolExecutor() {
return super.getThreadPoolExecutor();
}
}
}