1 /*

     2  * Copyright 2008-2009 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 4607272

    26  * @summary Unit test for java.nio.channels.AsynchronousFileChannel

    27  * @build CustomThreadPool MyThreadFactory

    28  * @run main/othervm -Djava.nio.channels.DefaultThreadPool.threadFactory=MyThreadFactory CustomThreadPool

    29  */

    30 

    31 import java.io.File;

    32 import static java.nio.file.StandardOpenOption.*;

    33 import java.nio.ByteBuffer;

    34 import java.nio.channels.*;

    35 import java.util.concurrent.atomic.AtomicReference;

    36 

    37 public class CustomThreadPool {

    38 

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

    40         File blah = File.createTempFile("blah", null);

    41         blah.deleteOnExit();

    42         AsynchronousFileChannel ch =

    43             AsynchronousFileChannel.open(blah.toPath(), READ, WRITE);

    44         ByteBuffer src = ByteBuffer.wrap("Scooby Snacks".getBytes());

    45 

    46         final AtomicReference<Thread> invoker = new AtomicReference<Thread>();

    47         ch.write(src, 0, invoker,

    48             new CompletionHandler<Integer,AtomicReference<Thread>>() {

    49                 public void completed(Integer result, AtomicReference<Thread> invoker) {

    50                     invoker.set(Thread.currentThread());

    51                 }

    52                 public void failed(Throwable exc, AtomicReference<Thread> invoker) {

    53                 }

    54                 public void cancelled(AtomicReference<Thread> invoker) {

    55                 }

    56             });

    57         Thread t;

    58         while ((t = invoker.get()) == null) {

    59             Thread.sleep(100);

    60         }

    61         ch.close();

    62 

    63         // check handler was run by known thread

    64         if (!MyThreadFactory.created(t))

    65             throw new RuntimeException("Handler invoked by unknown thread");

    66     }

    67 }