Mercurial > hg > release > icedtea7-forest-2.0 > jaxws
view sources/jaxws_src/src/com/sun/xml/internal/org/jvnet/mimepull/WeakDataFile.java @ 282:78c175236707
Update to jdk7-jaxws-2009_09_28.zip
author | andrew |
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date | Thu, 22 Sep 2011 02:57:13 +0100 |
parents | |
children | 4f4a2cd249d8 |
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/* * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Sun designates this * particular file as subject to the "Classpath" exception as provided * by Sun in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. */ package com.sun.xml.internal.org.jvnet.mimepull; import java.io.File; import java.io.IOException; import java.io.RandomAccessFile; import java.lang.ref.ReferenceQueue; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.List; import java.util.logging.Logger; /** * Removing files based on this * <a href="http://java.sun.com/developer/technicalArticles/javase/finalization/">article</a> * * @author Jitendra Kotamraju */ final class WeakDataFile extends WeakReference<DataFile> { private static final Logger LOGGER = Logger.getLogger(WeakDataFile.class.getName()); private static final int MAX_ITERATIONS = 2; private static ReferenceQueue<DataFile> refQueue = new ReferenceQueue<DataFile>(); private static List<WeakDataFile> refList = new ArrayList<WeakDataFile>(); private final File file; private final RandomAccessFile raf; WeakDataFile(DataFile df, File file) { super(df, refQueue); refList.add(this); this.file = file; try { raf = new RandomAccessFile(file, "rw"); } catch(IOException ioe) { throw new MIMEParsingException(ioe); } drainRefQueueBounded(); } synchronized void read(long pointer, byte[] buf, int offset, int length ) { try { raf.seek(pointer); raf.readFully(buf, offset, length); } catch(IOException ioe) { throw new MIMEParsingException(ioe); } } synchronized long writeTo(long pointer, byte[] data, int offset, int length) { try { raf.seek(pointer); raf.write(data, offset, length); return raf.getFilePointer(); // Update pointer for next write } catch(IOException ioe) { throw new MIMEParsingException(ioe); } } void close() { LOGGER.fine("Deleting file = "+file.getName()); refList.remove(this); try { raf.close(); file.delete(); } catch(IOException ioe) { throw new MIMEParsingException(ioe); } } void renameTo(File f) { LOGGER.fine("Moving file="+file+" to="+f); refList.remove(this); try { raf.close(); file.renameTo(f); } catch(IOException ioe) { throw new MIMEParsingException(ioe); } } static void drainRefQueueBounded() { int iterations = 0; WeakDataFile weak = (WeakDataFile) refQueue.poll(); while (weak != null && iterations < MAX_ITERATIONS) { LOGGER.fine("Cleaning file = "+weak.file+" from reference queue."); weak.close(); ++iterations; weak = (WeakDataFile) refQueue.poll(); } } }