/*

 * Copyright (c) 2008, 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

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 */

import static java.util.concurrent.TimeUnit.NANOSECONDS;

import static java.util.concurrent.TimeUnit.SECONDS;

import java.util.concurrent.DelayQueue;

import java.util.concurrent.Delayed;

/**

 * This is not a regression test, but a stress benchmark test for

 * 6609775: Reduce context switches in DelayQueue due to signalAll

 *

 * This runs in the same wall clock time, but much reduced cpu time,

 * with the changes for 6609775.

 */

public class Stress {

    public static void main(String[] args) throws Throwable {

        final DelayQueue<Delayed> q = new DelayQueue<Delayed>();

        final long t0 = System.nanoTime();

        for (long i = 0; i < 1000; i++) {

            final long expiry = t0 + i*10L*1000L*1000L;

            q.add(new Delayed() {

                    public long getDelay(TimeUnit unit) {

                        return unit.convert(expiry - System.nanoTime(),

                                            NANOSECONDS);

                    }

                    public int compareTo(Delayed x) {

                        long d = getDelay(NANOSECONDS)

                            - x.getDelay(NANOSECONDS);

                        return d < 0 ? -1 : d > 0 ? 1 : 0; }});

        }

        for (int i = 0; i < 300; i++)

            new Thread() { public void run() {

                try {

                    while (!q.isEmpty())

                        q.poll(10L, TimeUnit.SECONDS);

                } catch (Throwable t) { t.printStackTrace(); }

            }}.start();

    }

}