/*
* Copyright 2002-2015 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.core.task;
import java.util.concurrent.ThreadFactory;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.springframework.util.ConcurrencyThrottleSupport;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
/**
* @author Rick Evans
* @author Juergen Hoeller
* @author Sam Brannen
*/
public class SimpleAsyncTaskExecutorTests {
@Rule
public final ExpectedException exception = ExpectedException.none();
// TODO Determine why task is executed when concurrency is switched off.
@Ignore("Disabled because task is still executed when concurrency is switched off")
@Test
public void cannotExecuteWhenConcurrencyIsSwitchedOff() throws Exception {
SimpleAsyncTaskExecutor executor = new SimpleAsyncTaskExecutor();
executor.setConcurrencyLimit(ConcurrencyThrottleSupport.NO_CONCURRENCY);
assertFalse(executor.isThrottleActive());
exception.expect(IllegalStateException.class);
executor.execute(new NoOpRunnable());
}
@Test
public void throttleIsNotActiveByDefault() throws Exception {
SimpleAsyncTaskExecutor executor = new SimpleAsyncTaskExecutor();
assertFalse("Concurrency throttle must not default to being active (on)", executor.isThrottleActive());
}
@Test
public void threadNameGetsSetCorrectly() throws Exception {
final String customPrefix = "chankPop#";
final Object monitor = new Object();
SimpleAsyncTaskExecutor executor = new SimpleAsyncTaskExecutor(customPrefix);
ThreadNameHarvester task = new ThreadNameHarvester(monitor);
executeAndWait(executor, task, monitor);
assertThat(task.getThreadName(), startsWith(customPrefix));
}
@Test
public void threadFactoryOverridesDefaults() throws Exception {
final Object monitor = new Object();
SimpleAsyncTaskExecutor executor = new SimpleAsyncTaskExecutor(new ThreadFactory() {
@Override
public Thread newThread(Runnable r) {
return new Thread(r, "test");
}
});
ThreadNameHarvester task = new ThreadNameHarvester(monitor);
executeAndWait(executor, task, monitor);
assertEquals("test", task.getThreadName());
}
@Test
public void throwsExceptionWhenSuppliedWithNullRunnable() throws Exception {
exception.expect(IllegalArgumentException.class);
new SimpleAsyncTaskExecutor().execute(null);
}
private void executeAndWait(SimpleAsyncTaskExecutor executor, Runnable task, Object monitor) {
synchronized (monitor) {
executor.execute(task);
try {
monitor.wait();
}
catch (InterruptedException ignored) {
}
}
}
private static final class NoOpRunnable implements Runnable {
@Override
public void run() {
// no-op
}
}
private static abstract class AbstractNotifyingRunnable implements Runnable {
private final Object monitor;
protected AbstractNotifyingRunnable(Object monitor) {
this.monitor = monitor;
}
@Override
public final void run() {
synchronized (this.monitor) {
try {
doRun();
}
finally {
this.monitor.notifyAll();
}
}
}
protected abstract void doRun();
}
private static final class ThreadNameHarvester extends AbstractNotifyingRunnable {
private String threadName;
protected ThreadNameHarvester(Object monitor) {
super(monitor);
}
public String getThreadName() {
return this.threadName;
}
@Override
protected void doRun() {
this.threadName = Thread.currentThread().getName();
}
}
}