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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
package com.keuin.kbackupfabric.operation.backup.method;
import com.keuin.kbackupfabric.backup.incremental.ObjectCollection2;
import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionFactory;
import com.keuin.kbackupfabric.backup.incremental.ObjectCollectionSerializer;
import com.keuin.kbackupfabric.backup.incremental.identifier.Sha256Identifier;
import com.keuin.kbackupfabric.backup.incremental.manager.IncCopyResult;
import com.keuin.kbackupfabric.backup.incremental.manager.IncrementalBackupStorageManager;
import com.keuin.kbackupfabric.backup.incremental.serializer.IncBackupInfoSerializer;
import com.keuin.kbackupfabric.backup.incremental.serializer.SavedIncrementalBackup;
import com.keuin.kbackupfabric.backup.name.BackupFileNameEncoder;
import com.keuin.kbackupfabric.backup.name.IncrementalBackupFileNameEncoder;
import com.keuin.kbackupfabric.metadata.BackupMetadata;
import com.keuin.kbackupfabric.operation.backup.feedback.IncrementalBackupFeedback;
import com.keuin.kbackupfabric.util.FilesystemUtil;
import com.keuin.kbackupfabric.util.PrintUtil;
import com.keuin.kbackupfabric.util.ThreadingUtil;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.time.ZoneId;
import java.util.Arrays;
import java.util.HashSet;
import java.util.logging.Logger;
public class ConfiguredIncrementalBackupMethod implements ConfiguredBackupMethod {
private final String backupIndexFileName;
private final String levelPath;
private final String backupIndexFileSaveDirectory;
private final String backupBaseDirectory;
private static final Logger LOGGER = Logger.getLogger(ConfiguredIncrementalBackupMethod.class.getName());
public ConfiguredIncrementalBackupMethod(String backupIndexFileName, String levelPath, String backupIndexFileSaveDirectory, String backupBaseDirectory) {
this.backupIndexFileName = backupIndexFileName;
this.levelPath = levelPath;
this.backupIndexFileSaveDirectory = backupIndexFileSaveDirectory;
this.backupBaseDirectory = backupBaseDirectory;
}
@Override
public IncrementalBackupFeedback backup() {
final int hashFactoryThreads = ThreadingUtil.getRecommendedThreadCount(); // how many threads do we use to generate the hash tree
LOGGER.info("Threads: " + hashFactoryThreads);
// needed in abort progress
File levelPathFile = new File(levelPath);
IncrementalBackupFeedback feedback;
IncrementalBackupStorageManager storageManager = null;
ObjectCollection2 collection = null; // this backup's collection
try {
// construct incremental backup index
PrintUtil.info("Hashing files...");
collection = new ObjectCollectionFactory<>(Sha256Identifier.getFactory(), hashFactoryThreads, 16)
.fromDirectory(levelPathFile, new HashSet<>(Arrays.asList("session.lock", "kbackup_metadata")));
// update storage
PrintUtil.info("Copying files...");
storageManager = new IncrementalBackupStorageManager(Paths.get(backupBaseDirectory));
IncCopyResult copyResult = storageManager.addObjectCollection(collection, levelPathFile);
if (copyResult == null) {
PrintUtil.info("Failed to backup. No further information.");
return new IncrementalBackupFeedback(false, null);
}
// save index file
PrintUtil.info("Saving index file...");
// legacy index file
// ObjectCollectionSerializer.toFile(collection, new File(backupIndexFileSaveDirectory, backupIndexFileName));
// create directory
final File indexDirectoryFile = new File(backupIndexFileSaveDirectory);
if (indexDirectoryFile.isFile())
throw new IOException("There is a file which has the same name with index directory");
if (!indexDirectoryFile.isDirectory() && !indexDirectoryFile.mkdirs())
throw new IOException("Backup index save directory does not exist and we failed to create it");
// newer saved info (with metadata)
File indexFile = new File(backupIndexFileSaveDirectory, backupIndexFileName);
BackupFileNameEncoder.BackupBasicInformation info = IncrementalBackupFileNameEncoder.INSTANCE.decode(backupIndexFileName);
IncBackupInfoSerializer.toFile(indexFile, SavedIncrementalBackup.newLatest(
collection,
info.customName,
info.time.atZone(ZoneId.systemDefault()),
copyResult.getTotalBytes(),
copyResult.getCopiedBytes(),
copyResult.getCopiedFiles(),
copyResult.getTotalFiles()
));
// return result
PrintUtil.info("Incremental backup finished.");
feedback = new IncrementalBackupFeedback(true, copyResult);
} catch (IOException e) {
// e.printStackTrace(); // stack trace has been passed to backup feedback. No need to print here.
feedback = new IncrementalBackupFeedback(e);
}
// do clean-up if failed
if (!feedback.isSuccess()) {
LOGGER.severe("Failed to backup. Cleaning up...");
// remove index file
File backupIndexFile = new File(backupIndexFileSaveDirectory, backupIndexFileName);
if (backupIndexFile.exists()) {
if (!backupIndexFile.delete()) {
LOGGER.warning("Failed to clean up: cannot delete file " + backupIndexFile.getName());
return feedback; // not try to remove unused files
}
}
// remove unused object files in the base
if (collection != null) {
try {
// collection may have been copied (partially) to the base, but we may not need them
// so we perform a clean here
// perform a clean-up
Iterable<ObjectCollection2> backups = ObjectCollectionSerializer.fromDirectory(new File(backupIndexFileSaveDirectory));
storageManager.deleteObjectCollection(collection, backups);
} catch (IOException e) {
LOGGER.warning("An exception occurred while cleaning up: " + e);
}
LOGGER.info("Backup aborted.");
}
}
return feedback;
}
@Override
public boolean restore() throws IOException {
// load collection
PrintUtil.info("Loading file list...");
SavedIncrementalBackup info = IncBackupInfoSerializer.fromFile(
new File(backupIndexFileSaveDirectory, backupIndexFileName)
);
PrintUtil.info("Backup Info: " + info);
// delete old level
File levelPathFile = new File(levelPath);
PrintUtil.info("Deleting old level...");
if (!FilesystemUtil.forceDeleteDirectory(levelPathFile)) {
PrintUtil.info("Failed to delete old level!");
return false;
}
// restore file
PrintUtil.info("Copying files...");
IncrementalBackupStorageManager storageManager = new IncrementalBackupStorageManager(Paths.get(backupBaseDirectory));
int restoreObjectCount = storageManager.restoreObjectCollection(info.getObjectCollection(), levelPathFile);
// write metadata file
File metadataFile = new File(levelPathFile, BackupMetadata.metadataFileName);
try (FileOutputStream fos = new FileOutputStream(metadataFile)) {
try (ObjectOutputStream oos = new ObjectOutputStream(fos)) {
oos.writeObject(new BackupMetadata(info.getBackupTime().toEpochSecond() * 1000, info.getBackupName()));
}
} catch (IOException e) {
PrintUtil.warn("Failed to write restore metadata: " + e + ". KBackup won't print restoration information during the next startup.");
try {
Files.deleteIfExists(metadataFile.toPath());
} catch (IOException ignored) {
}
}
PrintUtil.info(String.format("%d file(s) restored.", restoreObjectCount));
return true;
}
@Override
public boolean touch() {
File baseDirectoryFile = new File(backupBaseDirectory);
return baseDirectoryFile.isDirectory() || baseDirectoryFile.mkdir();
}
@Override
public String getBackupFileName() {
return backupIndexFileName;
}
}
|
