1 /*

     2  * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

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

    21  * have any questions.

    22  */

    23 

    24 /* @test

    25  * @bug 4729342

    26  * @summary Check for CancelledKeyException when key cancelled during select

    27  */

    28 

    29 import java.nio.channels.*;

    30 import java.io.IOException;

    31 import java.net.*;

    32 

    33 public class SelectAndCancel {

    34     static ServerSocketChannel ssc;

    35     static Selector selector;

    36     static SelectionKey sk;

    37     static InetSocketAddress isa;

    38     public static int TEST_PORT = 40170;

    39 

    40     /*

    41      * CancelledKeyException is the failure symptom of 4729342

    42      * NOTE: The failure is timing dependent and is not always

    43      * seen immediately when the bug is present.

    44      */

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

    46         InetAddress lh = InetAddress.getLocalHost();

    47         isa = new InetSocketAddress(lh, TEST_PORT);

    48         selector = Selector.open();

    49         ssc = ServerSocketChannel.open();

    50 

    51         // Create and start a selector in a separate thread.

    52         new Thread(new Runnable() {

    53                 public void run() {

    54                     try {

    55                         ssc.configureBlocking(false);

    56                         ssc.socket().bind(isa);

    57                         sk = ssc.register(selector, SelectionKey.OP_ACCEPT);

    58                         selector.select();

    59                     } catch (IOException e) {

    60                         System.err.println("error in selecting thread");

    61                         e.printStackTrace();

    62                     }

    63                 }

    64             }).start();

    65 

    66         // Wait for above thread to get to select() before we call close.

    67         Thread.sleep(3000);

    68 

    69         // Try to close. This should wakeup select.

    70         new Thread(new Runnable() {

    71                 public void run() {

    72                     try {

    73                         SocketChannel sc = SocketChannel.open();

    74                         sc.connect(isa);

    75                         ssc.close();

    76                         sk.cancel();

    77                         sc.close();

    78                     } catch (IOException e) {

    79                         System.err.println("error in closing thread");

    80                         System.err.println(e);

    81                     }

    82                 }

    83             }).start();

    84 

    85         // Wait for select() to be awakened, which should be done by close.

    86         Thread.sleep(3000);

    87 

    88         selector.wakeup();

    89         selector.close();

    90     }

    91 }