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
|
/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.scanner.scan;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.nio.file.Path;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DirectoryLock {
private static final Logger LOGGER = LoggerFactory.getLogger(DirectoryLock.class);
public static final String LOCK_FILE_NAME = ".sonar_lock";
private final Path lockFilePath;
private RandomAccessFile lockRandomAccessFile;
private FileChannel lockChannel;
private FileLock lockFile;
public DirectoryLock(Path directory) {
this.lockFilePath = directory.resolve(LOCK_FILE_NAME).toAbsolutePath();
}
public boolean tryLock() {
try {
lockRandomAccessFile = new RandomAccessFile(lockFilePath.toFile(), "rw");
lockChannel = lockRandomAccessFile.getChannel();
lockFile = lockChannel.tryLock(0, 1024, false);
return lockFile != null;
} catch (IOException e) {
throw new IllegalStateException("Failed to create lock in " + lockFilePath.toString(), e);
}
}
public void unlock() {
if (lockFile != null) {
try {
lockFile.release();
lockFile = null;
} catch (IOException e) {
LOGGER.error("Error releasing lock", e);
}
}
if (lockChannel != null) {
try {
lockChannel.close();
lockChannel = null;
} catch (IOException e) {
LOGGER.error("Error closing file channel", e);
}
}
if (lockRandomAccessFile != null) {
try {
lockRandomAccessFile.close();
lockRandomAccessFile = null;
} catch (IOException e) {
LOGGER.error("Error closing file", e);
}
}
}
}
|
