/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 6730507

 * @summary java.util.Timer schedule delay Long.MAX_VALUE causes task to execute multiple times

 * @author Chris Hegarty

 * @author Martin Buchholz

 */

import java.util.Date;

import java.util.Timer;

import java.util.TimerTask;

import java.util.concurrent.*;

import java.util.concurrent.atomic.AtomicInteger;

public class DelayOverflow

{

    void scheduleNow(Timer timer, TimerTask task, int how) {

        switch (how) {

            case 0 :

                timer.schedule(task, new Date(), Long.MAX_VALUE);

                break;

            case 1:

                timer.schedule(task, 0L, Long.MAX_VALUE);

                break;

            case 2:

                timer.scheduleAtFixedRate(task, new Date(), Long.MAX_VALUE);

                break;

            case 3:

                timer.scheduleAtFixedRate(task, 0L, Long.MAX_VALUE);

                break;

            default:

                fail(String.valueOf(how));

        }

    }

    void sleep(long millis) {

        try { Thread.sleep(millis); }

        catch (Throwable t) { unexpected(t); }

    }

    /** Checks that scheduledExecutionTime returns a "recent" time. */

    void checkScheduledExecutionTime(TimerTask task) {

        long t = System.currentTimeMillis()

            - task.scheduledExecutionTime();

        check(t >= 0 && t < 1000 * 600);

    }

    void test(String[] args) throws Throwable {

        for (int how=0; how<4; how++) {

            final CountDownLatch done = new CountDownLatch(1);

            final AtomicInteger count = new AtomicInteger(0);

            final Timer timer = new Timer();

            final TimerTask task = new TimerTask() {

                @Override

                public void run() {

                    checkScheduledExecutionTime(this);

                    count.incrementAndGet();

                    done.countDown();

                }};

            scheduleNow(timer, task, how);

            done.await();

            equal(count.get(), 1);

            checkScheduledExecutionTime(task);

            if (new java.util.Random().nextBoolean())

                sleep(10);

            check(task.cancel());

            timer.cancel();

            checkScheduledExecutionTime(task);

        }

    }

    //--------------------- Infrastructure ---------------------------

    volatile int passed = 0, failed = 0;

    void pass() {passed++;}

    void fail() {failed++; Thread.dumpStack();}

    void fail(String msg) {System.err.println(msg); fail();}

    void unexpected(Throwable t) {failed++; t.printStackTrace();}

    void check(boolean cond) {if (cond) pass(); else fail();}

    void equal(Object x, Object y) {

        if (x == null ? y == null : x.equals(y)) pass();

        else fail(x + " not equal to " + y);}

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

        Class<?> k = new Object(){}.getClass().getEnclosingClass();

        try {k.getMethod("instanceMain",String[].class)

                .invoke( k.newInstance(), (Object) args);}

        catch (Throwable e) {throw e.getCause();}}

    public void instanceMain(String[] args) throws Throwable {

        try {test(args);} catch (Throwable t) {unexpected(t);}

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

        if (failed > 0) throw new AssertionError("Some tests failed");}

}