/*
* Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
* Copyright (C) 2009, Google Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.storage.file;
import java.io.EOFException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.Channels;
import java.security.DigestOutputStream;
import java.security.MessageDigest;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import org.eclipse.jgit.errors.ObjectWritingException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.transport.PackParser;
import org.eclipse.jgit.util.FileUtils;
import org.eclipse.jgit.util.IO;
/** Creates loose objects in a {@link ObjectDirectory}. */
class ObjectDirectoryInserter extends ObjectInserter {
private final FileObjectDatabase db;
private final WriteConfig config;
private Deflater deflate;
ObjectDirectoryInserter(final FileObjectDatabase dest, final Config cfg) {
db = dest;
config = cfg.get(WriteConfig.KEY);
}
@Override
public ObjectId insert(int type, byte[] data, int off, int len)
throws IOException {
ObjectId id = idFor(type, data, off, len);
if (db.has(id)) {
return id;
} else {
File tmp = toTemp(type, data, off, len);
return insertOneObject(tmp, id);
}
}
@Override
public ObjectId insert(final int type, long len, final InputStream is)
throws IOException {
if (len <= buffer().length) {
byte[] buf = buffer();
int actLen = IO.readFully(is, buf, 0);
return insert(type, buf, 0, actLen);
} else {
MessageDigest md = digest();
File tmp = toTemp(md, type, len, is);
ObjectId id = ObjectId.fromRaw(md.digest());
return insertOneObject(tmp, id);
}
}
private ObjectId insertOneObject(final File tmp, final ObjectId id)
throws IOException, ObjectWritingException {
switch (db.insertUnpackedObject(tmp, id, false /* no duplicate */)) {
case INSERTED:
case EXISTS_PACKED:
case EXISTS_LOOSE:
return id;
case FAILURE:
default:
break;
}
final File dst = db.fileFor(id);
throw new ObjectWritingException("Unable to create new object: " + dst);
}
@Override
public PackParser newPackParser(InputStream in) throws IOException {
return new ObjectDirectoryPackParser(db, in);
}
@Override
public void flush() throws IOException {
// Do nothing. Objects are immediately visible.
}
@Override
public void release() {
if (deflate != null) {
try {
deflate.end();
} finally {
deflate = null;
}
}
}
@SuppressWarnings("resource" /* java 7 */)
private File toTemp(final MessageDigest md, final int type, long len,
final InputStream is) throws IOException, FileNotFoundException,
Error {
boolean delete = true;
File tmp = newTempFile();
try {
FileOutputStream fOut = new FileOutputStream(tmp);
try {
OutputStream out = fOut;
if (config.getFSyncObjectFiles())
out = Channels.newOutputStream(fOut.getChannel());
DeflaterOutputStream cOut = compress(out);
DigestOutputStream dOut = new DigestOutputStream(cOut, md);
writeHeader(dOut, type, len);
final byte[] buf = buffer();
while (len > 0) {
int n = is.read(buf, 0, (int) Math.min(len, buf.length));
if (n <= 0)
throw shortInput(len);
dOut.write(buf, 0, n);
len -= n;
}
dOut.flush();
cOut.finish();
} finally {
if (config.getFSyncObjectFiles())
fOut.getChannel().force(true);
fOut.close();
}
delete = false;
return tmp;
} finally {
if (delete)
FileUtils.delete(tmp);
}
}
@SuppressWarnings("resource" /* java 7 */)
private File toTemp(final int type, final byte[] buf, final int pos,
final int len) throws IOException, FileNotFoundException {
boolean delete = true;
File tmp = newTempFile();
try {
FileOutputStream fOut = new FileOutputStream(tmp);
try {
OutputStream out = fOut;
if (config.getFSyncObjectFiles())
out = Channels.newOutputStream(fOut.getChannel());
DeflaterOutputStream cOut = compress(out);
writeHeader(cOut, type, len);
cOut.write(buf, pos, len);
cOut.finish();
} finally {
if (config.getFSyncObjectFiles())
fOut.getChannel().force(true);
fOut.close();
}
delete = false;
return tmp;
} finally {
if (delete)
FileUtils.delete(tmp);
}
}
void writeHeader(OutputStream out, final int type, long len)
throws IOException {
out.write(Constants.encodedTypeString(type));
out.write((byte) ' ');
out.write(Constants.encodeASCII(len));
out.write((byte) 0);
}
File newTempFile() throws IOException {
return File.createTempFile("noz", null, db.getDirectory());
}
DeflaterOutputStream compress(final OutputStream out) {
if (deflate == null)
deflate = new Deflater(config.getCompression());
else
deflate.reset();
return new DeflaterOutputStream(out, deflate, 8192);
}
private static EOFException shortInput(long missing) {
return new EOFException("Input did not match supplied length. "
+ missing + " bytes are missing.");
}
}