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src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/WeakDataFile.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/mimepull/WeakDataFile.java

Thu, 31 Aug 2017 15:18:52 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:18:52 +0800

changeset 637

9c07ef4934dd

parent 368

0989ad8c0860

parent 0

373ffda63c9a

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package com.sun.xml.internal.org.jvnet.mimepull;
aoqi@0	27
aoqi@0	28	import java.io.File;
aoqi@0	29	import java.io.IOException;
aoqi@0	30	import java.io.RandomAccessFile;
aoqi@0	31	import java.lang.ref.ReferenceQueue;
aoqi@0	32	import java.lang.ref.WeakReference;
aoqi@0	33	import java.util.ArrayList;
aoqi@0	34	import java.util.List;
aoqi@0	35	import java.util.concurrent.Executor;
aoqi@0	36	import java.util.logging.Level;
aoqi@0	37	import java.util.logging.Logger;
aoqi@0	38
aoqi@0	39	/**
aoqi@0	40	* Removing files based on this
aoqi@0	41	* <a href="http://java.sun.com/developer/technicalArticles/javase/finalization/">article</a>
aoqi@0	42	*
aoqi@0	43	* @author Jitendra Kotamraju
aoqi@0	44	*/
aoqi@0	45	final class WeakDataFile extends WeakReference<DataFile> {
aoqi@0	46
aoqi@0	47	private static final Logger LOGGER = Logger.getLogger(WeakDataFile.class.getName());
aoqi@0	48	//private static final int MAX_ITERATIONS = 2;
aoqi@0	49	private static ReferenceQueue<DataFile> refQueue = new ReferenceQueue<DataFile>();
aoqi@0	50	private static List<WeakDataFile> refList = new ArrayList<WeakDataFile>();
aoqi@0	51	private final File file;
aoqi@0	52	private final RandomAccessFile raf;
aoqi@0	53	private static boolean hasCleanUpExecutor = false;
aoqi@0	54	static {
aoqi@0	55	CleanUpExecutorFactory executorFactory = CleanUpExecutorFactory.newInstance();
aoqi@0	56	if (executorFactory!=null) {
aoqi@0	57	if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0	58	LOGGER.log(Level.FINE, "Initializing clean up executor for MIMEPULL: {0}", executorFactory.getClass().getName());
aoqi@0	59	}
aoqi@0	60	Executor executor = executorFactory.getExecutor();
aoqi@0	61	executor.execute(new Runnable() {
aoqi@0	62	@Override
aoqi@0	63	public void run() {
aoqi@0	64	WeakDataFile weak;
aoqi@0	65	while (true) {
aoqi@0	66	try {
aoqi@0	67	weak = (WeakDataFile) refQueue.remove();
aoqi@0	68	if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0	69	LOGGER.log(Level.FINE, "Cleaning file = {0} from reference queue.", weak.file);
aoqi@0	70	}
aoqi@0	71	weak.close();
aoqi@0	72	} catch (InterruptedException e) {
aoqi@0	73	}
aoqi@0	74	}
aoqi@0	75	}
aoqi@0	76	});
aoqi@0	77	hasCleanUpExecutor = true;
aoqi@0	78	}
aoqi@0	79	}
aoqi@0	80
aoqi@0	81	WeakDataFile(DataFile df, File file) {
aoqi@0	82	super(df, refQueue);
aoqi@0	83	refList.add(this);
aoqi@0	84	this.file = file;
aoqi@0	85	try {
aoqi@0	86	raf = new RandomAccessFile(file, "rw");
aoqi@0	87	} catch(IOException ioe) {
aoqi@0	88	throw new MIMEParsingException(ioe);
aoqi@0	89	}
aoqi@0	90	if (!hasCleanUpExecutor) {
aoqi@0	91	drainRefQueueBounded();
aoqi@0	92	}
aoqi@0	93	}
aoqi@0	94
aoqi@0	95	synchronized void read(long pointer, byte[] buf, int offset, int length ) {
aoqi@0	96	try {
aoqi@0	97	raf.seek(pointer);
aoqi@0	98	raf.readFully(buf, offset, length);
aoqi@0	99	} catch(IOException ioe) {
aoqi@0	100	throw new MIMEParsingException(ioe);
aoqi@0	101	}
aoqi@0	102	}
aoqi@0	103
aoqi@0	104	synchronized long writeTo(long pointer, byte[] data, int offset, int length) {
aoqi@0	105	try {
aoqi@0	106	raf.seek(pointer);
aoqi@0	107	raf.write(data, offset, length);
aoqi@0	108	return raf.getFilePointer(); // Update pointer for next write
aoqi@0	109	} catch(IOException ioe) {
aoqi@0	110	throw new MIMEParsingException(ioe);
aoqi@0	111	}
aoqi@0	112	}
aoqi@0	113
aoqi@0	114	void close() {
aoqi@0	115	if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0	116	LOGGER.log(Level.FINE, "Deleting file = {0}", file.getName());
aoqi@0	117	}
aoqi@0	118	refList.remove(this);
aoqi@0	119	try {
aoqi@0	120	raf.close();
aoqi@0	121	boolean deleted = file.delete();
aoqi@0	122	if (!deleted) {
aoqi@0	123	if (LOGGER.isLoggable(Level.INFO)) {
aoqi@0	124	LOGGER.log(Level.INFO, "File {0} was not deleted", file.getAbsolutePath());
aoqi@0	125	}
aoqi@0	126	}
aoqi@0	127	} catch(IOException ioe) {
aoqi@0	128	throw new MIMEParsingException(ioe);
aoqi@0	129	}
aoqi@0	130	}
aoqi@0	131
aoqi@0	132	void renameTo(File f) {
aoqi@0	133	if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0	134	LOGGER.log(Level.FINE, "Moving file={0} to={1}", new Object[]{file, f});
aoqi@0	135	}
aoqi@0	136	refList.remove(this);
aoqi@0	137	try {
aoqi@0	138	raf.close();
aoqi@0	139	boolean renamed = file.renameTo(f);
aoqi@0	140	if (!renamed) {
aoqi@0	141	if (LOGGER.isLoggable(Level.INFO)) {
aoqi@0	142	LOGGER.log(Level.INFO, "File {0} was not moved to {1}", new Object[] {file.getAbsolutePath(), f.getAbsolutePath()});
aoqi@0	143	}
aoqi@0	144	}
aoqi@0	145	} catch(IOException ioe) {
aoqi@0	146	throw new MIMEParsingException(ioe);
aoqi@0	147	}
aoqi@0	148
aoqi@0	149	}
aoqi@0	150
aoqi@0	151	static void drainRefQueueBounded() {
aoqi@0	152	WeakDataFile weak;
aoqi@0	153	while (( weak = (WeakDataFile) refQueue.poll()) != null ) {
aoqi@0	154	if (LOGGER.isLoggable(Level.FINE)) {
aoqi@0	155	LOGGER.log(Level.FINE, "Cleaning file = {0} from reference queue.", weak.file);
aoqi@0	156	}
aoqi@0	157	weak.close();
aoqi@0	158	}
aoqi@0	159	}
aoqi@0	160	}