/*
* Quasar: lightweight threads and actors for the JVM.
* Copyright (c) 2013-2014, Parallel Universe Software Co. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 3.0
* as published by the Free Software Foundation.
*/
package co.paralleluniverse.strands.dataflow;
import co.paralleluniverse.common.test.TestUtil;
import co.paralleluniverse.fibers.Fiber;
import co.paralleluniverse.fibers.SuspendExecution;
import co.paralleluniverse.strands.Strand;
import co.paralleluniverse.strands.SuspendableCallable;
import co.paralleluniverse.strands.SuspendableRunnable;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
import static org.hamcrest.CoreMatchers.*;
import org.junit.Ignore;
import org.junit.Rule;
import org.junit.rules.TestName;
import org.junit.rules.TestRule;
/**
*
* @author pron
*/
public class ValTest {
@Rule
public TestName name = new TestName();
@Rule
public TestRule watchman = TestUtil.WATCHMAN;
public ValTest() {
}
@Test(expected = IllegalStateException.class)
public void whenValIsSetTwiceThenThrowException() throws Exception {
final Val<String> val = new Val<>();
val.set("hello");
val.set("goodbye");
}
@Test
public void testThreadWaiter() throws Exception {
final Val<String> val = new Val<>();
final AtomicReference<String> res = new AtomicReference<>();
final Thread t1 = new Thread(Strand.toRunnable(new SuspendableRunnable() {
@Override
public void run() throws SuspendExecution {
try {
final String v = val.get();
res.set(v);
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}));
t1.start();
Thread.sleep(100);
val.set("yes!");
t1.join();
assertThat(res.get(), equalTo("yes!"));
assertThat(val.get(), equalTo("yes!"));
}
@Test
public void testFiberWaiter() throws Exception {
final Val<String> val = new Val<>();
final Fiber<String> f1 = new Fiber<String>(new SuspendableCallable<String>() {
@Override
public String run() throws SuspendExecution, InterruptedException {
final String v = val.get();
return v;
}
}).start();
Thread.sleep(100);
val.set("yes!");
f1.join();
assertThat(f1.get(), equalTo("yes!"));
assertThat(val.get(), equalTo("yes!"));
}
@Test
public void testThreadAndFiberWaiters() throws Exception {
final Val<String> val = new Val<>();
final AtomicReference<String> res = new AtomicReference<>();
final Fiber<String> f1 = new Fiber<String>(new SuspendableCallable<String>() {
@Override
public String run() throws SuspendExecution, InterruptedException {
final String v = val.get();
return v;
}
}).start();
final Thread t1 = new Thread(Strand.toRunnable(new SuspendableRunnable() {
@Override
public void run() throws SuspendExecution {
try {
final String v = val.get();
res.set(v);
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}));
t1.start();
Thread.sleep(100);
val.set("yes!");
t1.join();
f1.join();
assertThat(f1.get(), equalTo("yes!"));
assertThat(res.get(), equalTo("yes!"));
assertThat(val.get(), equalTo("yes!"));
}
@Test
public void complexTest1() throws Exception {
final Val<Integer> val1 = new Val<>();
final Val<Integer> val2 = new Val<>();
final AtomicReference<Integer> res = new AtomicReference<>();
final Fiber<Integer> f1 = new Fiber<Integer>(new SuspendableCallable<Integer>() {
@Override
public Integer run() throws SuspendExecution, InterruptedException {
return val1.get() + val2.get();
}
}).start();
final Thread t1 = new Thread(Strand.toRunnable(new SuspendableRunnable() {
@Override
public void run() throws SuspendExecution {
try {
res.set(val1.get() * val2.get());
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}));
t1.start();
final Fiber<Integer> f2 = new Fiber<Integer>(new SuspendableRunnable() {
@Override
public void run() throws SuspendExecution, InterruptedException {
val2.set(5);
}
}).start();
Thread.sleep(100);
val1.set(8);
int myRes = val1.get() - val2.get();
t1.join();
f1.join();
assertThat(f1.get(), equalTo(13));
assertThat(res.get(), equalTo(40));
assertThat(myRes, is(3));
f2.join();
}
@Test
public void complexTest2() throws Exception {
final Val<Integer> val1 = new Val<>();
final Val<Integer> val2 = new Val<>();
final Val<Integer> val3 = new Val<>();
final Val<Integer> val4 = new Val<>();
final AtomicReference<Integer> res = new AtomicReference<>();
final Strand f1 = new Fiber<Integer>(new SuspendableRunnable() {
@Override
public void run() throws InterruptedException, SuspendExecution {
val2.set(val1.get() + 1); // 2
}
}).start();
final Strand t1 = Strand.of(new Thread(Strand.toRunnable(new SuspendableRunnable() {
@Override
public void run() throws SuspendExecution {
try {
val3.set(val1.get() + val2.get()); // 3
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
}
}))).start();
final Strand f2 = new Fiber<Integer>(new SuspendableRunnable() {
@Override
public void run() throws InterruptedException, SuspendExecution {
val4.set(val2.get() + val3.get()); // 5
}
}).start();
Thread.sleep(100);
val1.set(1);
int myRes = val4.get();
assertThat(myRes, is(5));
t1.join();
f1.join();
f2.join();
}
}