1 /*

     2  * Copyright 2006 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 /**

    25  *

    26  * @test

    27  * @bug 6322678

    28  * @summary Test for making sure that fd is closed during

    29  *          finalization of a stream, when an associated

    30  *          file channel is not available

    31  */

    32 

    33 import java.io.*;

    34 import java.nio.*;

    35 import java.nio.channels.*;

    36 

    37 public class FileChannelFDTest {

    38 

    39     static byte data[] = new byte[] {48, 49, 50, 51, 52, 53, 54, 55, 56, 57,};

    40     static String inFileName = "fd-in-test.txt";

    41     static String outFileName = "fd-out-test.txt";

    42     static File inFile;

    43     static File outFile;

    44 

    45     private static void writeToInFile() throws IOException {

    46         FileOutputStream out = new FileOutputStream(inFile);

    47         out.write(data);

    48         out.close();

    49     }

    50 

    51     public static void main(String[] args)

    52                 throws Exception {

    53 

    54         inFile= new File(System.getProperty("test.dir", "."),

    55                         inFileName);

    56         inFile.createNewFile();

    57         inFile.deleteOnExit();

    58         writeToInFile();

    59 

    60         outFile  = new File(System.getProperty("test.dir", "."),

    61                         outFileName);

    62         outFile.createNewFile();

    63         outFile.deleteOnExit();

    64 

    65         doFileChannel();

    66     }

    67 

    68      private static void doFileChannel() throws Exception {

    69 

    70         FileInputStream fis = new FileInputStream(inFile);

    71         FileDescriptor fd = fis.getFD();

    72         FileChannel fc = fis.getChannel();

    73         System.out.println("Created fis:" + fis);

    74 

    75         /**

    76          * Encourage the GC

    77          */

    78         fis = null;

    79         fc = null;

    80         System.gc();

    81         Thread.sleep(500);

    82 

    83         if (fd.valid()) {

    84             throw new Exception("Finalizer either didn't run --" +

    85                 "try increasing the Thread's sleep time after System.gc();" +

    86                 "or the finalizer didn't close the file");

    87         }

    88 

    89         System.out.println("File Closed successfully");

    90         System.out.println();

    91   }

    92 }