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IoSchedulerTest.java
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/**
* Copyright 2014 Netflix, Inc.
*
* 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 rx.schedulers;
import static org.junit.Assert.assertTrue;
import java.util.concurrent.atomic.AtomicBoolean;
import org.junit.Test;
import rx.*;
import rx.Scheduler.Worker;
import rx.functions.*;
public class IoSchedulerTest extends AbstractSchedulerConcurrencyTests {
@Override
protected Scheduler getScheduler() {
return Schedulers.io();
}
/**
* IO scheduler defaults to using CachedThreadScheduler
*/
@Test
public final void testIOScheduler() {
Observable<Integer> o1 = Observable.just(1, 2, 3, 4, 5);
Observable<Integer> o2 = Observable.just(6, 7, 8, 9, 10);
Observable<String> o = Observable.merge(o1, o2).map(new Func1<Integer, String>() {
@Override
public String call(Integer t) {
assertTrue(Thread.currentThread().getName().startsWith("RxIoScheduler"));
return "Value_" + t + "_Thread_" + Thread.currentThread().getName();
}
});
o.subscribeOn(Schedulers.io()).toBlocking().forEach(new Action1<String>() {
@Override
public void call(String t) {
System.out.println("t: " + t);
}
});
}
@Test
public final void testUnhandledErrorIsDeliveredToThreadHandler() throws InterruptedException {
SchedulerTests.testUnhandledErrorIsDeliveredToThreadHandler(getScheduler());
}
@Test
public final void testHandledErrorIsNotDeliveredToThreadHandler() throws InterruptedException {
SchedulerTests.testHandledErrorIsNotDeliveredToThreadHandler(getScheduler());
}
@Test(timeout = 60000)
public void testCancelledTaskRetention() throws InterruptedException {
Worker w = Schedulers.io().createWorker();
try {
SchedulerTests.testCancelledRetention(w, false);
} finally {
w.unsubscribe();
}
w = Schedulers.io().createWorker();
try {
SchedulerTests.testCancelledRetention(w, true);
} finally {
w.unsubscribe();
}
}
// Tests that an uninterruptible worker does not get reused
@Test(timeout = 10000)
public void testUninterruptibleActionDoesNotBlockOtherAction() throws InterruptedException {
final Worker uninterruptibleWorker = Schedulers.io().createWorker();
final AtomicBoolean running = new AtomicBoolean(false);
final AtomicBoolean shouldQuit = new AtomicBoolean(false);
try {
uninterruptibleWorker.schedule(new Action0() {
@Override
public void call() {
synchronized (running) {
running.set(true);
running.notifyAll();
}
synchronized (shouldQuit) {
while (!shouldQuit.get()) {
try {
shouldQuit.wait();
} catch (final InterruptedException ignored) {
}
}
}
synchronized (running) {
running.set(false);
running.notifyAll();
}
}
});
// Wait for the action to start executing
synchronized (running) {
while (!running.get()) {
running.wait();
}
}
} finally {
uninterruptibleWorker.unsubscribe();
}
final Worker otherWorker = Schedulers.io().createWorker();
final AtomicBoolean otherActionRan = new AtomicBoolean(false);
try {
otherWorker.schedule(new Action0() {
@Override
public void call() {
otherActionRan.set(true);
}
});
Thread.sleep(1000); // give the action a chance to run
} finally {
otherWorker.unsubscribe();
}
assertTrue(running.get()); // uninterruptible action keeps on running since InterruptedException is swallowed
assertTrue(otherActionRan.get());
// Wait for uninterruptibleWorker to exit (to clean up after ourselves)
synchronized (shouldQuit) {
shouldQuit.set(true);
shouldQuit.notifyAll();
}
synchronized (running) {
while (running.get()) {
running.wait();
}
}
}
}