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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
package com.keuin.kbackupfabric.operation.backup.method;
import com.keuin.kbackupfabric.backup.name.IncrementalBackupFileNameEncoder;
import com.keuin.kbackupfabric.operation.backup.feedback.IncrementalBackupFeedback;
import org.apache.commons.codec.digest.DigestUtils;
import org.junit.Test;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.LocalDateTime;
import java.util.*;
import java.util.function.Function;
import static org.apache.commons.io.FileUtils.forceDelete;
import static org.junit.Assert.*;
public class ConfiguredIncrementalBackupMethodTest {
private final String testTempPath = (new File("R:\\").isDirectory()) ? "R:\\" : ".\\testfile\\ConfiguredIncrementalBackupMethodTest";
private final String sourceDirectoryName = "source";
private final String destDirectoryName = "destination";
private final String customBackupName = "index";
private final String indexFileName = new IncrementalBackupFileNameEncoder().encode(customBackupName, LocalDateTime.now());
private final double directoryFactor = 0.05;
private final double fileFactor = 0.1;
private final int maxRandomFileSizeBytes = 1024 * 1024;
private final Function<Integer, Integer> scaleDecayFunc = (x) -> x - 1;
@Test
public void iterationTest() throws IOException {
int a = 12;
for (int i = 0; i < a; ++i) {
performTest(Math.min(i + 1, 10));
System.out.println("Round " + i + " passed.");
}
}
private void performTest(int scale) throws IOException {
// init source and destination
final Path sourcePath = Paths.get(testTempPath, sourceDirectoryName);
final Path destPath = Paths.get(testTempPath, destDirectoryName);
if (new File(sourcePath.toString()).exists()) {
forceDelete(new File(sourcePath.toString()));
if (!new File(sourcePath.toString()).mkdirs())
fail();
}
if (new File(destPath.toString()).exists()) {
forceDelete(new File(destPath.toString()));
if (!new File(destPath.toString()).mkdirs())
fail();
}
if (new File(testTempPath, indexFileName).exists()) {
if (!new File(testTempPath, indexFileName).delete())
fail();
}
// initialize src
createRandomDirectoryTree(sourcePath.toString(), scale);
String hash1 = calcMD5HashForDir(sourcePath.toFile(), true);
// copy src to dest
ConfiguredIncrementalBackupMethod method = new ConfiguredIncrementalBackupMethod(
indexFileName,
sourcePath.toString(),
testTempPath,
destPath.toString()
);
IncrementalBackupFeedback feedback = method.backup();
assertNotNull("Feedback should not be null.", feedback);
if (!feedback.isSuccess())
fail("Failed to backup. Cannot perform test.");
assertTrue("Index file was not generated by backup.", new File(testTempPath, indexFileName).exists());
// delete src
forceDelete(sourcePath.toFile());
assertFalse(sourcePath.toFile().exists());
// restore src
if (!method.restore())
fail();
boolean fake = scale % 2 != 0;
int[] success = new int[1];
if (fake) {
Files.walk(sourcePath).filter(path -> path.toFile().isFile()).limit(3).forEach(path -> {
if (!path.toFile().delete())
fail();
success[0]++;
});
if (success[0] == 0)
fake = false;
}
if (fake)
System.out.println("Fake: deleted " + success[0] + " file(s).");
String hash2 = calcMD5HashForDir(sourcePath.toFile(), true);
if (!fake)
assertEquals(hash1, hash2);
else
assertNotEquals(hash1, hash2);
}
private void createRandomDirectoryTree(String path, int scale) throws IOException {
if (scale <= 0) {
if (Math.random() < 0.5)
if (!new File(path).mkdirs() && !new File(path).exists())
throw new IOException("Failed to create directory " + path);
return;
}
if (!new File(path).isDirectory() && !new File(path).mkdirs())
throw new IOException("Failed to create directory " + path);
int subFileCount = (int) Math.round(Math.random() * 10 * scale * fileFactor);
for (int i = 0; i < subFileCount; i++) {
String subFile = null;
while (subFile == null || new File(path, subFile).exists())
subFile = getRandomString((int) (Math.random() * 16 + 5));
createRandomFile(new File(path, subFile), maxRandomFileSizeBytes);
}
int subDirCount = (int) Math.round(Math.random() * 10 * scale * directoryFactor);
for (int i = 0; i < subDirCount; i++) {
String subDir = null;
while (subDir == null || new File(path, subDir).exists())
subDir = getRandomString((int) (Math.random() * 16 + 5));
createRandomDirectoryTree(new File(path, subDir).getAbsolutePath(), scaleDecayFunc.apply(scale));
}
}
private static void createRandomFile(File file, int maxSizeBytes) throws IOException {
if (!file.createNewFile())
throw new IOException("Failed to create file " + file.getAbsolutePath());
try (FileOutputStream fileOutputStream = new FileOutputStream(file)) {
int fileBytes = (int) (maxSizeBytes * Math.random() + 1);
Random random = new Random();
final int chunkSize = 1024 * 4;
byte[] randomChunk = new byte[chunkSize];
for (int i = 0; i < fileBytes / chunkSize; i++) {
random.nextBytes(randomChunk);
fileOutputStream.write(randomChunk);
}
if (fileBytes % chunkSize != 0) {
randomChunk = new byte[fileBytes % chunkSize];
random.nextBytes(randomChunk);
fileOutputStream.write(randomChunk);
}
}
}
private static String getRandomString(int length) {
String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
Random random = new Random();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; i++) {
int number = random.nextInt(62);
sb.append(str.charAt(number));
}
return sb.toString();
}
public String calcMD5HashForDir(File dirToHash, boolean includeHiddenFiles) {
assert (dirToHash.isDirectory());
Vector<FileInputStream> fileStreams = new Vector<>();
System.out.println("Found files for hashing:");
collectInputStreams(dirToHash, fileStreams, includeHiddenFiles);
SequenceInputStream seqStream =
new SequenceInputStream(fileStreams.elements());
try {
String md5Hash = DigestUtils.md5Hex(seqStream);
seqStream.close();
return md5Hash;
} catch (IOException e) {
throw new RuntimeException("Error reading files to hash in "
+ dirToHash.getAbsolutePath(), e);
}
}
private void collectInputStreams(File dir,
List<FileInputStream> foundStreams,
boolean includeHiddenFiles) {
File[] fileList = dir.listFiles();
Arrays.sort(fileList, // Need in reproducible order
new Comparator<File>() {
public int compare(File f1, File f2) {
return f1.getName().compareTo(f2.getName());
}
});
for (File f : fileList) {
if (!includeHiddenFiles && f.getName().startsWith(".")) {
// Skip it
} else if (f.isDirectory()) {
collectInputStreams(f, foundStreams, includeHiddenFiles);
} else {
try {
System.out.println("\t" + f.getAbsolutePath());
foundStreams.add(new FileInputStream(f));
} catch (FileNotFoundException e) {
throw new AssertionError(e.getMessage()
+ ": file should never not be found!");
}
}
}
}
}
|
