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 5004077

    26  * @summary Check blocking of select and close

    27  */

    28 

    29 import java.nio.channels.*;

    30 import java.io.IOException;

    31 

    32 public class SelectAndClose {

    33     static Selector selector;

    34     static boolean awakened = false;

    35     static boolean closed = false;

    36 

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

    38         selector = Selector.open();

    39 

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

    41         new Thread(new Runnable() {

    42                 public void run() {

    43                     try {

    44                         selector.select();

    45                         awakened = true;

    46                     } catch (IOException e) {

    47                         System.err.println(e);

    48                     }

    49                 }

    50             }).start();

    51 

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

    53         Thread.sleep(3000);

    54 

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

    56         new Thread(new Runnable() {

    57                 public void run() {

    58                     try {

    59                         selector.close();

    60                         closed = true;

    61                     } catch (IOException e) {

    62                         System.err.println(e);

    63                     }

    64                 }

    65             }).start();

    66 

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

    68         Thread.sleep(3000);

    69 

    70         if (!awakened)

    71             selector.wakeup();

    72 

    73         // Correct result is true and true

    74         if (!awakened)

    75             throw new RuntimeException("Select did not wake up");

    76         if (!closed)

    77             throw new RuntimeException("Selector did not close");

    78     }

    79 }