jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/WeakDataFile.java@f50545b5e2f1

     1 /*

     2  * Copyright (c) 1997, 2010, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.xml.internal.org.jvnet.mimepull;

    28 import java.io.File;

    29 import java.io.IOException;

    30 import java.io.RandomAccessFile;

    31 import java.lang.ref.ReferenceQueue;

    32 import java.lang.ref.WeakReference;

    33 import java.util.ArrayList;

    34 import java.util.List;

    35 import java.util.concurrent.Executor;

    36 import java.util.logging.Logger;

    38 /**

    39  * Removing files based on this

    40  * <a href="http://java.sun.com/developer/technicalArticles/javase/finalization/">article</a>

    41  *

    42  * @author Jitendra Kotamraju

    43  */

    44 final class WeakDataFile extends WeakReference<DataFile> {

    46     private static final Logger LOGGER = Logger.getLogger(WeakDataFile.class.getName());

    47     //private static final int MAX_ITERATIONS = 2;

    48     private static ReferenceQueue<DataFile> refQueue = new ReferenceQueue<DataFile>();

    49     private static List<WeakDataFile> refList = new ArrayList<WeakDataFile>();

    50     private final File file;

    51     private final RandomAccessFile raf;

    52     private static boolean hasCleanUpExecutor = false;

    53     static {

    54         CleanUpExecutorFactory executorFactory = CleanUpExecutorFactory.newInstance();

    55         if (executorFactory!=null) {

    56             LOGGER.fine("Initializing clean up executor for MIMEPULL: "

    57                     + executorFactory.getClass().getName());

    58             Executor executor = executorFactory.getExecutor();

    59             executor.execute(new Runnable() {

    60                 public void run() {

    61                     WeakDataFile weak = null;

    62                     while (true) {

    63                         try {

    64                             weak = (WeakDataFile) refQueue.remove();

    65                             LOGGER.fine("Cleaning file = "+weak.file+" from reference queue.");

    66                             weak.close();

    67                         } catch (InterruptedException e) {

    68                         }

    69                     }

    70                 }

    71             });

    72             hasCleanUpExecutor = true;

    73         }

    74     }

    76     WeakDataFile(DataFile df, File file) {

    77         super(df, refQueue);

    78         refList.add(this);

    79         this.file = file;

    80         try {

    81             raf = new RandomAccessFile(file, "rw");

    82         } catch(IOException ioe) {

    83             throw new MIMEParsingException(ioe);

    84         }

    85         if (!hasCleanUpExecutor) {

    86             drainRefQueueBounded();

    87         }

    88     }

    90     synchronized void read(long pointer, byte[] buf, int offset, int length ) {

    91         try {

    92             raf.seek(pointer);

    93             raf.readFully(buf, offset, length);

    94         } catch(IOException ioe) {

    95             throw new MIMEParsingException(ioe);

    96         }

    97     }

    99     synchronized long writeTo(long pointer, byte[] data, int offset, int length) {

   100         try {

   101             raf.seek(pointer);

   102             raf.write(data, offset, length);

   103             return raf.getFilePointer();    // Update pointer for next write

   104         } catch(IOException ioe) {

   105             throw new MIMEParsingException(ioe);

   106         }

   107     }

   109     void close() {

   110         LOGGER.fine("Deleting file = "+file.getName());

   111         refList.remove(this);

   112         try {

   113             raf.close();

   114             file.delete();

   115         } catch(IOException ioe) {

   116             throw new MIMEParsingException(ioe);

   117         }

   118     }

   120     void renameTo(File f) {

   121         LOGGER.fine("Moving file="+file+" to="+f);

   122         refList.remove(this);

   123         try {

   124             raf.close();

   125             file.renameTo(f);

   126         } catch(IOException ioe) {

   127             throw new MIMEParsingException(ioe);

   128         }

   130     }

   132     static void drainRefQueueBounded() {

   133         WeakDataFile weak = null;

   134         while (( weak = (WeakDataFile) refQueue.poll()) != null ) {

   135             LOGGER.fine("Cleaning file = "+weak.file+" from reference queue.");

   136             weak.close();

   137         }

   138     }

   139 }

Mercurial > jdk8-mips64-public > jaxws / file revision