/*

 * Copyright (c) 2005, 2012, 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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 * questions.

 */

/*

 * @test

 * @bug 6277663

 * @summary Test TPE extensibility framework

 * @author Martin Buchholz

 */

import java.util.concurrent.ArrayBlockingQueue;

import java.util.concurrent.Callable;

import java.util.concurrent.FutureTask;

import java.util.concurrent.RunnableFuture;

import java.util.concurrent.RunnableScheduledFuture;

import java.util.concurrent.ScheduledThreadPoolExecutor;

import java.util.concurrent.ThreadPoolExecutor;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.atomic.AtomicInteger;

public class Custom {

    static volatile int passed = 0, failed = 0;

    static void pass() { passed++; }

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

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

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

    static void equal(Object x, Object y) {

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

        else {System.out.println(x + " not equal to " + y); fail(); }}

    private static class CustomTask<V> extends FutureTask<V> {

        public static final AtomicInteger births = new AtomicInteger(0);

        CustomTask(Callable<V> c) { super(c); births.getAndIncrement(); }

        CustomTask(Runnable r, V v) { super(r, v); births.getAndIncrement(); }

    }

    private static class CustomTPE extends ThreadPoolExecutor {

        CustomTPE() {

            super(threadCount, threadCount,

                  30, TimeUnit.MILLISECONDS,

                  new ArrayBlockingQueue<Runnable>(2*threadCount));

        }

        protected <V> RunnableFuture<V> newTaskFor(Callable<V> c) {

            return new CustomTask<V>(c);

        }

        protected <V> RunnableFuture<V> newTaskFor(Runnable r, V v) {

            return new CustomTask<V>(r, v);

        }

    }

    private static class CustomSTPE extends ScheduledThreadPoolExecutor {

        public static final AtomicInteger decorations = new AtomicInteger(0);

        CustomSTPE() {

            super(threadCount);

        }

        protected <V> RunnableScheduledFuture<V> decorateTask(

            Runnable r, RunnableScheduledFuture<V> task) {

            decorations.getAndIncrement();

            return task;

        }

        protected <V> RunnableScheduledFuture<V> decorateTask(

            Callable<V> c, RunnableScheduledFuture<V> task) {

            decorations.getAndIncrement();

            return task;

        }

    }

    static int countExecutorThreads() {

        Thread[] threads = new Thread[Thread.activeCount()+100];

        Thread.enumerate(threads);

        int count = 0;

        for (Thread t : threads)

            if (t != null && t.getName().matches("pool-[0-9]+-thread-[0-9]+"))

                count++;

        return count;

    }

    private static final int threadCount = 10;

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

        CustomTPE tpe = new CustomTPE();

        equal(tpe.getCorePoolSize(), threadCount);

        equal(countExecutorThreads(), 0);

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

            tpe.submit(new Runnable() { public void run() {}});

        equal(countExecutorThreads(), threadCount);

        equal(CustomTask.births.get(), threadCount);

        tpe.shutdown();

        CustomSTPE stpe = new CustomSTPE();

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

            stpe.submit(new Runnable() { public void run() {}});

        equal(CustomSTPE.decorations.get(), threadCount);

        equal(countExecutorThreads(), threadCount);

        stpe.shutdown();

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

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

    }

}