-
Notifications
You must be signed in to change notification settings - Fork 129
/
StoreChunkInputStream.java
151 lines (132 loc) · 4.37 KB
/
StoreChunkInputStream.java
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
150
151
/*
* ModeShape (http://www.modeshape.org)
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
* See the AUTHORS.txt file in the distribution for a full listing of
* individual contributors.
*
* ModeShape is free software. Unless otherwise indicated, all code in ModeShape
* is licensed to you under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* ModeShape 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.fcrepo.utils.infinispan;
import org.infinispan.Cache;
import org.infinispan.container.entries.CacheEntry;
import org.infinispan.container.entries.InternalCacheEntry;
import org.infinispan.loaders.CacheLoaderException;
import org.infinispan.loaders.CacheStore;
import org.infinispan.marshall.MarshalledValue;
import org.modeshape.common.logging.Logger;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectOutputStream;
/**
* Merges chunks from cache and provides InputStream-feeling.
*/
public class StoreChunkInputStream extends InputStream {
private final Logger logger;
private final CacheStore blobCache;
private final String key;
protected int indexInBuffer;
protected byte[] buffer;
private int chunkNumber;
public StoreChunkInputStream(CacheStore blobCache, String key){
logger = Logger.getLogger(getClass());
this.blobCache = blobCache;
this.key = key;
}
@Override
public int read() throws IOException {
if(indexInBuffer == -1){
return -1;
}
if(buffer == null || indexInBuffer >= buffer.length){
fillBuffer();
return read();
}
return buffer[indexInBuffer++] & 0xff;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
if(indexInBuffer == -1){
return -1;
}
if(buffer == null){
fillBuffer();
return read(b, off, len);
}
if(indexInBuffer >= buffer.length){
return -1;
}
if (indexInBuffer + len > buffer.length){
len = buffer.length - indexInBuffer;
}
System.arraycopy(buffer, indexInBuffer, b, off, len);
indexInBuffer += len;
if(indexInBuffer >= buffer.length){
fillBuffer();
}
return len;
}
@Override
public int available() throws IOException {
if (buffer == null) {
fillBuffer();
}
return buffer.length - indexInBuffer;
}
@Override
public final long skip(long n) throws IOException {
if(n <= 0 || indexInBuffer == -1){
return 0;
}
if(buffer == null){
fillBuffer();
return skip(n);
}
if (buffer.length + n > indexInBuffer){
n = buffer.length - indexInBuffer;
}
if (n < 0){
return 0;
}
indexInBuffer += n;
return n;
}
private void fillBuffer() throws IOException {
buffer = nextChunk();
if(buffer == null){
buffer = new byte[0];
indexInBuffer = -1;
} else {
indexInBuffer = 0;
}
}
protected byte[] nextChunk() throws IOException {
String chunkKey = key+"-"+chunkNumber++;
logger.debug("Read chunk {0}", chunkKey);
byte[] bytes;
try {
final CacheEntry cacheEntry = blobCache.load(chunkKey);
if(cacheEntry == null ) {
return null;
}
return (byte[]) cacheEntry.getValue();
} catch (CacheLoaderException e) {
throw new IOException(e.toString());
}
}
}