/*

 * Copyright (c) 2019 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.

 */

import java.net.DatagramPacket;

import java.net.DatagramSocket;

import java.net.MulticastSocket;

import java.net.SocketException;

import java.net.SocketTimeoutException;

import java.nio.channels.ClosedByInterruptException;

import java.nio.channels.DatagramChannel;

import java.util.concurrent.CountDownLatch;

import static java.lang.Thread.sleep;

/*

 * @test

 * @summary Check interrupt mechanism for DatagramSocket,

 *      MulticastSocket, and DatagramSocketAdaptor

 */

public class InterruptibleDatagramSocket {

    private static void test0(DatagramSocket s) throws Exception {

        CountDownLatch latch = new CountDownLatch(1);

        Thread testThread = Thread.currentThread();

        Thread coordinator = new Thread(() -> {

            try {

                latch.await();

                sleep(500);

                testThread.interrupt();

            } catch (InterruptedException e) {

            }

        });

        byte[] data = {0, 1, 2};

        DatagramPacket p = new DatagramPacket(data, data.length,

                s.getLocalAddress(), s.getLocalPort());

        s.setSoTimeout(2000);

        coordinator.start();

        latch.countDown();

        try {

            s.receive(p);

        } finally {

            try {

                coordinator.join();

            } catch (InterruptedException e) {

            }

        }

    }

    static void test(DatagramSocket s, boolean interruptible) throws Exception {

        try {

            test0(s);

            throw new RuntimeException("Receive shouldn't have succeeded");

        } catch (SocketTimeoutException e) {

            if (interruptible)

                throw e;

            System.out.println("Got expected SocketTimeoutException: " + e);

        } catch (SocketException e) {

            if ((e.getCause() instanceof ClosedByInterruptException) && interruptible) {

                System.out.println("Got expected ClosedByInterruptException: " + e);

            } else {

                throw e;

            }

        } catch (ClosedByInterruptException e) {

            if (!interruptible)

                throw e;

            System.out.println("Got expected ClosedByInterruptException: " + e);

        }

        if (s.isClosed() && !interruptible)

            throw new RuntimeException("DatagramSocket should not be closed");

        else if (!s.isClosed() && interruptible)

            throw new RuntimeException("DatagramSocket should be closed");

    }

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

        try (DatagramSocket s = new DatagramSocket()) {

            test(s, false);

        }

        try (DatagramSocket s = new MulticastSocket()) {

            test(s, false);

        }

        try (DatagramSocket s = DatagramChannel.open().socket()) {

            test(s, true);

        }

    }

}