1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* Copyright (C) 2015, Matthias Sohn <matthias.sohn@sap.com>
* 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.lfs.internal;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Path;
import java.security.DigestOutputStream;
import java.text.MessageFormat;
import org.eclipse.jgit.annotations.Nullable;
import org.eclipse.jgit.internal.storage.file.LockFile;
import org.eclipse.jgit.lfs.errors.CorruptLongObjectException;
import org.eclipse.jgit.lfs.lib.AnyLongObjectId;
import org.eclipse.jgit.lfs.lib.Constants;
import org.eclipse.jgit.lfs.lib.LongObjectId;
/**
* Output stream writing content to a {@link LockFile} which is committed on
* close(). The stream checks if the hash of the stream content matches the
* id.
*/
public class AtomicObjectOutputStream extends OutputStream {
private LockFile locked;
private DigestOutputStream out;
private boolean aborted;
private AnyLongObjectId id;
/**
* @param path
* @param id
* @throws IOException
*/
public AtomicObjectOutputStream(Path path, AnyLongObjectId id)
throws IOException {
locked = new LockFile(path.toFile());
locked.lock();
this.id = id;
out = new DigestOutputStream(locked.getOutputStream(),
Constants.newMessageDigest());
}
/**
* @param path
* @throws IOException
*/
public AtomicObjectOutputStream(Path path) throws IOException {
this(path, null);
}
/**
* @return content hash of the object which was streamed through this
* stream. May return {@code null} if called before closing this stream.
*/
public @Nullable AnyLongObjectId getId() {
return id;
}
@Override
public void write(int b) throws IOException {
out.write(b);
}
@Override
public void write(byte[] b) throws IOException {
out.write(b);
}
@Override
public void write(byte[] b, int off, int len) throws IOException {
out.write(b, off, len);
}
@Override
public void close() throws IOException {
out.close();
if (!aborted) {
if (id != null) {
verifyHash();
} else {
id = LongObjectId.fromRaw(out.getMessageDigest().digest());
}
locked.commit();
}
}
private void verifyHash() {
AnyLongObjectId contentHash = LongObjectId
.fromRaw(out.getMessageDigest().digest());
if (!contentHash.equals(id)) {
abort();
throw new CorruptLongObjectException(id, contentHash,
MessageFormat.format(LfsText.get().corruptLongObject,
contentHash, id));
}
}
/**
* Aborts the stream. Temporary file will be deleted
*/
public void abort() {
locked.unlock();
aborted = true;
}
}
|
