| /* |
| * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6267833 |
| * @summary Tests for invokeAny, invokeAll |
| * @author Martin Buchholz |
| */ |
| |
| import static java.util.concurrent.TimeUnit.NANOSECONDS; |
| import static java.util.concurrent.TimeUnit.SECONDS; |
| |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import java.util.stream.IntStream; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.CyclicBarrier; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.ThreadLocalRandom; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| public class Invoke { |
| static volatile int passed = 0, failed = 0; |
| |
| static void fail(String msg) { |
| failed++; |
| new AssertionError(msg).printStackTrace(); |
| } |
| |
| static void pass() { |
| passed++; |
| } |
| |
| static void unexpected(Throwable t) { |
| failed++; |
| t.printStackTrace(); |
| } |
| |
| static void check(boolean condition, String msg) { |
| if (condition) pass(); else fail(msg); |
| } |
| |
| static void check(boolean condition) { |
| check(condition, "Assertion failure"); |
| } |
| |
| static long secondsElapsedSince(long startTime) { |
| return NANOSECONDS.toSeconds(System.nanoTime() - startTime); |
| } |
| |
| static void awaitInterrupt(long timeoutSeconds) { |
| long startTime = System.nanoTime(); |
| try { |
| Thread.sleep(SECONDS.toMillis(timeoutSeconds)); |
| fail("timed out waiting for interrupt"); |
| } catch (InterruptedException expected) { |
| check(secondsElapsedSince(startTime) < timeoutSeconds); |
| } |
| } |
| |
| public static void main(String[] args) { |
| try { |
| testInvokeAll(); |
| testInvokeAny(); |
| testInvokeAny_cancellationInterrupt(); |
| } catch (Throwable t) { unexpected(t); } |
| |
| if (failed > 0) |
| throw new Error( |
| String.format("Passed = %d, failed = %d", passed, failed)); |
| } |
| |
| static final long timeoutSeconds = 10L; |
| |
| static void testInvokeAll() throws Throwable { |
| final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| final int nThreads = rnd.nextInt(2, 7); |
| final boolean timed = rnd.nextBoolean(); |
| final ExecutorService pool = Executors.newFixedThreadPool(nThreads); |
| final AtomicLong count = new AtomicLong(0); |
| class Task implements Callable<Long> { |
| public Long call() throws Exception { |
| return count.incrementAndGet(); |
| } |
| } |
| |
| try { |
| final List<Task> tasks = |
| IntStream.range(0, nThreads) |
| .mapToObj(i -> new Task()) |
| .collect(Collectors.toList()); |
| |
| List<Future<Long>> futures; |
| if (timed) { |
| long startTime = System.nanoTime(); |
| futures = pool.invokeAll(tasks, timeoutSeconds, SECONDS); |
| check(secondsElapsedSince(startTime) < timeoutSeconds); |
| } |
| else |
| futures = pool.invokeAll(tasks); |
| check(futures.size() == tasks.size()); |
| check(count.get() == tasks.size()); |
| |
| long gauss = 0; |
| for (Future<Long> future : futures) gauss += future.get(); |
| check(gauss == (tasks.size()+1)*tasks.size()/2); |
| |
| pool.shutdown(); |
| check(pool.awaitTermination(10L, SECONDS)); |
| } finally { |
| pool.shutdownNow(); |
| } |
| } |
| |
| static void testInvokeAny() throws Throwable { |
| final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| final boolean timed = rnd.nextBoolean(); |
| final ExecutorService pool = Executors.newSingleThreadExecutor(); |
| final AtomicLong count = new AtomicLong(0); |
| final CountDownLatch invokeAnyDone = new CountDownLatch(1); |
| class Task implements Callable<Long> { |
| public Long call() throws Exception { |
| long x = count.incrementAndGet(); |
| check(x <= 2); |
| if (x == 2) { |
| // wait for main thread to interrupt us ... |
| awaitInterrupt(timeoutSeconds); |
| // ... and then for invokeAny to return |
| check(invokeAnyDone.await(timeoutSeconds, SECONDS)); |
| } |
| return x; |
| } |
| } |
| |
| try { |
| final List<Task> tasks = |
| IntStream.range(0, rnd.nextInt(1, 7)) |
| .mapToObj(i -> new Task()) |
| .collect(Collectors.toList()); |
| |
| long val; |
| if (timed) { |
| long startTime = System.nanoTime(); |
| val = pool.invokeAny(tasks, timeoutSeconds, SECONDS); |
| check(secondsElapsedSince(startTime) < timeoutSeconds); |
| } |
| else |
| val = pool.invokeAny(tasks); |
| check(val == 1); |
| invokeAnyDone.countDown(); |
| |
| // inherent race between main thread interrupt and |
| // start of second task |
| check(count.get() == 1 || count.get() == 2); |
| |
| pool.shutdown(); |
| check(pool.awaitTermination(timeoutSeconds, SECONDS)); |
| } finally { |
| pool.shutdownNow(); |
| } |
| } |
| |
| /** |
| * Every remaining running task is sent an interrupt for cancellation. |
| */ |
| static void testInvokeAny_cancellationInterrupt() throws Throwable { |
| final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| final int nThreads = rnd.nextInt(2, 7); |
| final boolean timed = rnd.nextBoolean(); |
| final ExecutorService pool = Executors.newFixedThreadPool(nThreads); |
| final AtomicLong count = new AtomicLong(0); |
| final AtomicLong interruptedCount = new AtomicLong(0); |
| final CyclicBarrier allStarted = new CyclicBarrier(nThreads); |
| class Task implements Callable<Long> { |
| public Long call() throws Exception { |
| allStarted.await(); |
| long x = count.incrementAndGet(); |
| if (x > 1) |
| // main thread will interrupt us |
| awaitInterrupt(timeoutSeconds); |
| return x; |
| } |
| } |
| |
| try { |
| final List<Task> tasks = |
| IntStream.range(0, nThreads) |
| .mapToObj(i -> new Task()) |
| .collect(Collectors.toList()); |
| |
| long val; |
| if (timed) { |
| long startTime = System.nanoTime(); |
| val = pool.invokeAny(tasks, timeoutSeconds, SECONDS); |
| check(secondsElapsedSince(startTime) < timeoutSeconds); |
| } |
| else |
| val = pool.invokeAny(tasks); |
| check(val == 1); |
| |
| pool.shutdown(); |
| check(pool.awaitTermination(timeoutSeconds, SECONDS)); |
| |
| // Check after shutdown to avoid race |
| check(count.get() == nThreads); |
| } finally { |
| pool.shutdownNow(); |
| } |
| } |
| } |