1 /*

     2  * Copyright (c) 2001, 2003, 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 /* @test

    25    @bug 4434115 4802789

    26  * @summary Check for regressions in FileChannel.force

    27  */

    28 

    29 import java.io.*;

    30 import java.nio.*;

    31 import java.nio.channels.*;

    32 

    33 

    34 public class Force {

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

    36         writeAfterForce();

    37         forceReadableOnly();

    38     }

    39 

    40     // 4434115: FileChannel.write() fails when preceded by force() operation

    41     private static void writeAfterForce() throws Exception {

    42         byte[] srcData = new byte[20];

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

    44         blah.deleteOnExit();

    45         FileOutputStream fis = new FileOutputStream(blah);

    46         FileChannel fc = fis.getChannel();

    47         fc.write(ByteBuffer.wrap(srcData));

    48         fc.force(false);

    49         fc.write(ByteBuffer.wrap(srcData));

    50         fc.close();

    51     }

    52 

    53     // 4802789: FileChannel.force(true) throws IOException (windows)

    54     private static void forceReadableOnly() throws Exception {

    55         File f = File.createTempFile("blah", null);

    56         f.deleteOnExit();

    57         FileInputStream fis = new FileInputStream(f);

    58         FileChannel fc = fis.getChannel();

    59         fc.force(true);

    60         fc.close();

    61         fis.close();

    62     }

    63 }