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test/java/nio/channels/AsynchronousFileChannel/LotsOfWrites.java

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   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 /* @test
  25  * @bug 6913877
  26  * @summary Stress AsynchronousFileChannel.write

  27  */
  28 
  29 import java.io.*;
  30 import java.nio.ByteBuffer;
  31 import static java.nio.file.StandardOpenOption.*;
  32 import java.nio.channels.*;
  33 import java.util.Random;
  34 import java.util.concurrent.CountDownLatch;
  35 
  36 public class LotsOfWrites {
  37     static final Random rand = new Random();
  38 
  39     /**
  40      * Asynchronously writes a known pattern to a file up to a given size,
  41      * counting down a latch to release waiters when done.
  42      */
  43     static class Writer implements CompletionHandler<Integer,ByteBuffer> {
  44         private final File file;
  45         private final long size;
  46         private final CountDownLatch latch;




   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 /* @test
  25  * @bug 6913877
  26  * @summary Stress AsynchronousFileChannel.write
  27  * @key randomness
  28  */
  29 
  30 import java.io.*;
  31 import java.nio.ByteBuffer;
  32 import static java.nio.file.StandardOpenOption.*;
  33 import java.nio.channels.*;
  34 import java.util.Random;
  35 import java.util.concurrent.CountDownLatch;
  36 
  37 public class LotsOfWrites {
  38     static final Random rand = new Random();
  39 
  40     /**
  41      * Asynchronously writes a known pattern to a file up to a given size,
  42      * counting down a latch to release waiters when done.
  43      */
  44     static class Writer implements CompletionHandler<Integer,ByteBuffer> {
  45         private final File file;
  46         private final long size;
  47         private final CountDownLatch latch;


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