/*

 * Copyright 2008-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/* @test

 * @bug 4313887

 * @summary Unit test for Sun-specific ExtendedCopyOption.INTERRUPTIBLE option

 * @library ..

 * @run main/othervm -XX:-UseVMInterruptibleIO InterruptCopy

 */

import java.nio.file.*;

import java.nio.file.attribute.Attributes;

import java.io.*;

import java.util.concurrent.*;

import com.sun.nio.file.ExtendedCopyOption;

public class InterruptCopy {

    private static final long FILE_SIZE_TO_COPY = 512 * 1024 * 1024;

    private static final int DELAY_IN_MS = 500;

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

        Path dir = TestUtil.createTemporaryDirectory();

        try {

            FileStore store = dir.getFileStore();

            System.out.format("Checking space (%s)\n", store);

            long usableSpace = Attributes

                .readFileStoreSpaceAttributes(store).usableSpace();

            if (usableSpace < 2*FILE_SIZE_TO_COPY) {

                System.out.println("Insufficient disk space to run test.");

                return;

            }

            doTest(dir);

        } finally {

            TestUtil.removeAll(dir);

        }

    }

    static void doTest(Path dir) throws Exception {

        final Path source = dir.resolve("foo");

        final Path target = dir.resolve("bar");

        // create source file (don't create it as sparse file because we

        // require the copy to take a long time)

        System.out.println("Creating source file...");

        byte[] buf = new byte[32*1024];

        long total = 0;

        OutputStream out = source.newOutputStream();

        try {

            do {

                out.write(buf);

                total += buf.length;

            } while (total < FILE_SIZE_TO_COPY);

        } finally {

            out.close();

        }

        System.out.println("Source file created.");

        ScheduledExecutorService pool =

            Executors.newSingleThreadScheduledExecutor();

        try {

            // copy source to target in main thread, interrupting it after a delay

            final Thread me = Thread.currentThread();

            pool.schedule(new Runnable() {

                public void run() {

                    me.interrupt();

                }}, DELAY_IN_MS, TimeUnit.MILLISECONDS);

            System.out.println("Copying file...");

            try {

                source.copyTo(target, ExtendedCopyOption.INTERRUPTIBLE);

                throw new RuntimeException("Copy completed (this is not expected)");

            } catch (IOException e) {

                boolean interrupted = Thread.interrupted();

                if (!interrupted)

                    throw new RuntimeException("Interrupt status was not set");

                System.out.println("Copy failed (this is expected)");

            }

            // copy source to target via task in thread pool, interrupting it after

            // a delay using cancel(true)

            Future<Void> result = pool.submit(new Callable<Void>() {

                public Void call() throws IOException {

                    System.out.println("Copying file...");

                    source.copyTo(target, ExtendedCopyOption.INTERRUPTIBLE,

                        StandardCopyOption.REPLACE_EXISTING);

                    return null;

                }

            });

            Thread.sleep(DELAY_IN_MS);

            boolean cancelled = result.cancel(true);

            if (!cancelled)

                result.get();

            System.out.println("Copy cancelled.");

        } finally {

            pool.shutdown();

            pool.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);

        }

    }

}