|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Yiisoft\Mutex; |
|
6
|
|
|
|
|
7
|
|
|
use InvalidArgumentException; |
|
8
|
|
|
use PDO; |
|
9
|
|
|
use RuntimeException; |
|
10
|
|
|
|
|
11
|
|
|
/** |
|
12
|
|
|
* MysqlMutex implements mutex "lock" mechanism via MySQL locks. |
|
13
|
|
|
*/ |
|
14
|
|
|
final class MysqlMutex implements MutexInterface |
|
15
|
|
|
{ |
|
16
|
|
|
private string $name; |
|
17
|
|
|
private PDO $connection; |
|
18
|
|
|
private bool $released = false; |
|
19
|
|
|
|
|
20
|
|
|
/** |
|
21
|
|
|
* DbMutex constructor. |
|
22
|
|
|
* |
|
23
|
|
|
* @param string $name Mutex name. |
|
24
|
|
|
* @param PDO $connection PDO connection instance to use. |
|
25
|
|
|
*/ |
|
26
|
|
|
public function __construct(string $name, PDO $connection) |
|
27
|
|
|
{ |
|
28
|
|
|
$this->name = $name; |
|
29
|
|
|
$this->connection = $connection; |
|
30
|
|
|
$driverName = $connection->getAttribute(PDO::ATTR_DRIVER_NAME); |
|
31
|
|
|
if ($driverName !== 'mysql') { |
|
32
|
|
|
throw new InvalidArgumentException('MySQL connection instance should be passed. Got ' . $driverName . '.'); |
|
33
|
|
|
} |
|
34
|
|
|
} |
|
35
|
|
|
|
|
36
|
|
|
public function __destruct() |
|
37
|
|
|
{ |
|
38
|
|
|
if (!$this->released) { |
|
39
|
|
|
$this->release(); |
|
40
|
|
|
} |
|
41
|
|
|
} |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* {@inheritdoc} |
|
45
|
|
|
* |
|
46
|
|
|
* @see http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_get-lock |
|
47
|
|
|
*/ |
|
48
|
|
|
public function acquire(int $timeout = 0): bool |
|
49
|
|
|
{ |
|
50
|
|
|
$statement = $this->connection->prepare('SELECT GET_LOCK(:name, :timeout)'); |
|
51
|
|
|
$statement->bindValue(':name', $this->hashLockName($this->name)); |
|
52
|
|
|
$statement->bindValue(':timeout', $timeout); |
|
53
|
|
|
$statement->execute(); |
|
54
|
|
|
|
|
55
|
|
|
if ($statement->fetchColumn()) { |
|
56
|
|
|
$this->released = false; |
|
57
|
|
|
return true; |
|
58
|
|
|
} |
|
59
|
|
|
|
|
60
|
|
|
return false; |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
|
|
/** |
|
64
|
|
|
* {@inheritdoc} |
|
65
|
|
|
* |
|
66
|
|
|
* @see http://dev.mysql.com/doc/refman/5.0/en/miscellaneous-functions.html#function_release-lock |
|
67
|
|
|
*/ |
|
68
|
|
|
public function release(): void |
|
69
|
|
|
{ |
|
70
|
|
|
$statement = $this->connection->prepare('SELECT RELEASE_LOCK(:name)'); |
|
71
|
|
|
$statement->bindValue(':name', $this->hashLockName($this->name)); |
|
72
|
|
|
$statement->execute(); |
|
73
|
|
|
|
|
74
|
|
|
if (!$statement->fetchColumn()) { |
|
75
|
|
|
throw new RuntimeException("Unable to release lock \"$this->name\"."); |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
$this->released = true; |
|
79
|
|
|
} |
|
80
|
|
|
|
|
81
|
|
|
/** |
|
82
|
|
|
* Generate hash for lock name to avoid exceeding lock name length limit. |
|
83
|
|
|
* |
|
84
|
|
|
* @param string $name |
|
85
|
|
|
* |
|
86
|
|
|
* @return string |
|
87
|
|
|
* |
|
88
|
|
|
* @see https://github.com/yiisoft/yii2/pull/16836 |
|
89
|
|
|
*/ |
|
90
|
|
|
private function hashLockName(string $name): string |
|
91
|
|
|
{ |
|
92
|
|
|
return sha1($name); |
|
93
|
|
|
} |
|
94
|
|
|
} |
|
95
|
|
|
|
yiisoft /
mutex-pdo-mysql
