/*
* Copyright 2014-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.integration.util;
import static org.hamcrest.Matchers.instanceOf;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Test;
import org.springframework.core.task.TaskRejectedException;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
/**
* @author Gary Russell
* @author Artem Bilan
* @since 3.0.3
*
*/
public class CallerBlocksPolicyTests {
@Test
public void test0() throws Exception {
final ThreadPoolTaskExecutor te = new ThreadPoolTaskExecutor();
te.setCorePoolSize(1);
te.setMaxPoolSize(1);
te.setQueueCapacity(0);
te.setRejectedExecutionHandler(new CallerBlocksPolicy(1000));
te.initialize();
final AtomicReference<Throwable> e = new AtomicReference<Throwable>();
final CountDownLatch latch = new CountDownLatch(1);
Runnable task = new Runnable() {
@Override
public void run() {
try {
te.execute(this);
}
catch (TaskRejectedException tre) {
e.set(tre.getCause());
}
latch.countDown();
}
};
te.execute(task);
assertTrue(latch.await(10, TimeUnit.SECONDS));
assertThat(e.get(), instanceOf(RejectedExecutionException.class));
assertEquals("Max wait time expired to queue task", e.get().getMessage());
te.destroy();
}
@Test
public void test1() throws Exception {
final ThreadPoolTaskExecutor te = new ThreadPoolTaskExecutor();
te.setCorePoolSize(2);
te.setMaxPoolSize(2);
te.setQueueCapacity(1);
te.setRejectedExecutionHandler(new CallerBlocksPolicy(10000));
te.initialize();
final AtomicReference<Throwable> e = new AtomicReference<Throwable>();
final CountDownLatch latch = new CountDownLatch(3);
te.execute(() -> {
try {
Runnable foo = new Runnable() {
@Override
public void run() {
try {
Thread.sleep(1000);
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException();
}
latch.countDown();
}
};
te.execute(foo);
te.execute(foo); // this one will be queued
te.execute(foo); // this one will be blocked and successful later
}
catch (TaskRejectedException tre) {
e.set(tre.getCause());
}
});
assertTrue(latch.await(10, TimeUnit.SECONDS));
assertNull(e.get());
te.destroy();
}
}