1 /*

     2  * Copyright (c) 2019 Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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

    21  * questions.

    22  */

    23 

    24 import java.net.DatagramPacket;

    25 import java.net.DatagramSocket;

    26 import java.net.MulticastSocket;

    27 import java.net.SocketException;

    28 import java.net.SocketTimeoutException;

    29 import java.nio.channels.ClosedByInterruptException;

    30 import java.nio.channels.DatagramChannel;

    31 import java.util.concurrent.CountDownLatch;

    32 

    33 import static java.lang.Thread.sleep;

    34 

    35 /*

    36  * @test

    37  * @summary Check interrupt mechanism for DatagramSocket,

    38  *      MulticastSocket, and DatagramSocketAdaptor

    39  */

    40 

    41 public class InterruptibleDatagramSocket {

    42     private static void test0(DatagramSocket s) throws Exception {

    43         CountDownLatch latch = new CountDownLatch(1);

    44         Thread testThread = Thread.currentThread();

    45 

    46         Thread coordinator = new Thread(() -> {

    47             try {

    48                 latch.await();

    49                 sleep(500);

    50                 testThread.interrupt();

    51             } catch (InterruptedException e) {

    52             }

    53         });

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

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

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

    57         s.setSoTimeout(2000);

    58         coordinator.start();

    59         latch.countDown();

    60         try {

    61             s.receive(p);

    62         } finally {

    63             try {

    64                 coordinator.join();

    65             } catch (InterruptedException e) {

    66             }

    67         }

    68     }

    69 

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

    71         try {

    72             test0(s);

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

    74         } catch (SocketTimeoutException e) {

    75             if (interruptible)

    76                 throw e;

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

    78         } catch (SocketException e) {

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

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

    81             } else {

    82                 throw e;

    83             }

    84         } catch (ClosedByInterruptException e) {

    85             if (!interruptible)

    86                 throw e;

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

    88         }

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

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

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

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

    93     }

    94 

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

    96         try (DatagramSocket s = new DatagramSocket()) {

    97             test(s, false);

    98         }

    99         try (DatagramSocket s = new MulticastSocket()) {

   100             test(s, false);

   101         }

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

   103             test(s, true);

   104         }

   105     }

   106 }