/**
* Copyright 2013, Landz and its contributors. All rights reserved.
*
* 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 z.async;
import org.junit.Test;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.TimeUnit;
import static z.util.Throwables.uncheck;
public class BasicsOfForkJoin {
public static final int COUNT = 30_000_000;
// public static final AtomicLong ct = new AtomicLong();
@Test
public void testExternalInvoke() {
int parallelism = 7;
ForkJoinPool p = new ForkJoinPool(
parallelism, ForkJoinPool.defaultForkJoinWorkerThreadFactory, null, true);
long s = System.nanoTime();
for (int i = 0; i < COUNT; i++) {
p.execute(()->{});//ct.incrementAndGet()
}
long t1 = System.nanoTime()-s;
p.shutdown();
uncheck(() ->
p.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS));
// while (ct.get()!=COUNT) {}
long t2 = System.nanoTime()-s;
System.out.printf("costed %,d to submit %,d tasks, and %,d to complete\n",
t1, COUNT, t2);
System.out.println("done");
}
}