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/*
* 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.
*/
/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
*/
/*
* @test
* @bug 4486658
* @summary check ordering for blocking queues with 1 producer and multiple consumers
* @library /lib/testlibrary/
*/
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.LinkedTransferQueue;
import java.util.concurrent.PriorityBlockingQueue;
import java.util.concurrent.SynchronousQueue;
import jdk.testlibrary.Utils;
public class SingleProducerMultipleConsumerLoops {
static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
static ExecutorService pool;
public static void main(String[] args) throws Exception {
final int maxConsumers = (args.length > 0)
? Integer.parseInt(args[0])
: 5;
pool = Executors.newCachedThreadPool();
for (int i = 1; i <= maxConsumers; i += (i+1) >>> 1) {
// Adjust iterations to limit typical single runs to <= 10 ms;
// Notably, fair queues get fewer iters.
// Unbounded queues can legitimately OOME if iterations
// high enough, but we have a sufficiently low limit here.
run(new ArrayBlockingQueue<Integer>(100), i, 1000);
run(new LinkedBlockingQueue<Integer>(100), i, 1000);
run(new LinkedBlockingDeque<Integer>(100), i, 1000);
run(new LinkedTransferQueue<Integer>(), i, 700);
run(new PriorityBlockingQueue<Integer>(), i, 1000);
run(new SynchronousQueue<Integer>(), i, 300);
run(new SynchronousQueue<Integer>(true), i, 200);
run(new ArrayBlockingQueue<Integer>(100, true), i, 100);
}
pool.shutdown();
if (! pool.awaitTermination(LONG_DELAY_MS, MILLISECONDS))
throw new Error();
pool = null;
}
static void run(BlockingQueue<Integer> queue, int consumers, int iters) throws Exception {
new SingleProducerMultipleConsumerLoops(queue, consumers, iters).run();
}
final BlockingQueue<Integer> queue;
final int consumers;
final int iters;
final LoopHelpers.BarrierTimer timer = new LoopHelpers.BarrierTimer();
final CyclicBarrier barrier;
Throwable fail;
SingleProducerMultipleConsumerLoops(BlockingQueue<Integer> queue, int consumers, int iters) {
this.queue = queue;
this.consumers = consumers;
this.iters = iters;
this.barrier = new CyclicBarrier(consumers + 2, timer);
}
void run() throws Exception {
pool.execute(new Producer());
for (int i = 0; i < consumers; i++) {
pool.execute(new Consumer());
}
barrier.await();
barrier.await();
System.out.printf("%s, consumers=%d: %d ms%n",
queue.getClass().getSimpleName(), consumers,
NANOSECONDS.toMillis(timer.getTime()));
if (fail != null) throw new AssertionError(fail);
}
abstract class CheckedRunnable implements Runnable {
abstract void realRun() throws Throwable;
public final void run() {
try {
realRun();
} catch (Throwable t) {
fail = t;
t.printStackTrace();
throw new AssertionError(t);
}
}
}
class Producer extends CheckedRunnable {
volatile int result;
void realRun() throws Throwable {
barrier.await();
for (int i = 0; i < iters * consumers; i++) {
queue.put(new Integer(i));
}
barrier.await();
result = 432;
}
}
class Consumer extends CheckedRunnable {
volatile int result;
void realRun() throws Throwable {
barrier.await();
int l = 0;
int s = 0;
int last = -1;
for (int i = 0; i < iters; i++) {
Integer item = queue.take();
int v = item.intValue();
if (v < last)
throw new Error("Out-of-Order transfer");
last = v;
l = LoopHelpers.compute1(v);
s += l;
}
barrier.await();
result = s;
}
}
}
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