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 }