|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Yiisoft\Mutex\Pgsql; |
|
6
|
|
|
|
|
7
|
|
|
use InvalidArgumentException; |
|
8
|
|
|
use PDO; |
|
9
|
|
|
use Yiisoft\Mutex\Mutex; |
|
10
|
|
|
|
|
11
|
|
|
use function array_values; |
|
12
|
|
|
use function sha1; |
|
13
|
|
|
use function unpack; |
|
14
|
|
|
|
|
15
|
|
|
/** |
|
16
|
|
|
* PgsqlMutex implements mutex "lock" mechanism via PostgreSQL locks. |
|
17
|
|
|
*/ |
|
18
|
|
|
final class PgsqlMutex extends Mutex |
|
19
|
|
|
{ |
|
20
|
|
|
private array $lockKeys; |
|
21
|
|
|
private PDO $connection; |
|
22
|
|
|
|
|
23
|
|
|
/** |
|
24
|
|
|
* @param string $name Mutex name. |
|
25
|
|
|
* @param PDO $connection PDO connection instance to use. |
|
26
|
|
|
*/ |
|
27
|
8 |
|
public function __construct(string $name, PDO $connection) |
|
28
|
|
|
{ |
|
29
|
|
|
// Converts a string into two 16-bit integer keys using the SHA1 hash function. |
|
30
|
8 |
|
$this->lockKeys = array_values(unpack('n2', sha1($name, true))); |
|
31
|
8 |
|
$this->connection = $connection; |
|
32
|
|
|
|
|
33
|
|
|
/** @var string $driverName */ |
|
34
|
8 |
|
$driverName = $connection->getAttribute(PDO::ATTR_DRIVER_NAME); |
|
35
|
|
|
|
|
36
|
8 |
|
if ($driverName !== 'pgsql') { |
|
37
|
1 |
|
throw new InvalidArgumentException("PostgreSQL connection instance should be passed. Got \"$driverName\"."); |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
7 |
|
parent::__construct(self::class, $name); |
|
41
|
|
|
} |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* {@inheritdoc} |
|
45
|
|
|
* |
|
46
|
|
|
* @see https://www.postgresql.org/docs/13/functions-admin.html |
|
47
|
|
|
*/ |
|
48
|
7 |
|
protected function acquireLock(int $timeout = 0): bool |
|
49
|
|
|
{ |
|
50
|
7 |
|
$statement = $this->connection->prepare('SELECT pg_try_advisory_lock(:key1, :key2)'); |
|
51
|
7 |
|
$statement->bindValue(':key1', $this->lockKeys[0]); |
|
52
|
7 |
|
$statement->bindValue(':key2', $this->lockKeys[1]); |
|
53
|
7 |
|
$statement->execute(); |
|
54
|
|
|
|
|
55
|
7 |
|
return (bool) $statement->fetchColumn(); |
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
|
|
/** |
|
59
|
|
|
* {@inheritdoc} |
|
60
|
|
|
* |
|
61
|
|
|
* @see https://www.postgresql.org/docs/13/functions-admin.html |
|
62
|
|
|
*/ |
|
63
|
7 |
|
protected function releaseLock(): bool |
|
64
|
|
|
{ |
|
65
|
7 |
|
$statement = $this->connection->prepare('SELECT pg_advisory_unlock(:key1, :key2)'); |
|
66
|
7 |
|
$statement->bindValue(':key1', $this->lockKeys[0]); |
|
67
|
7 |
|
$statement->bindValue(':key2', $this->lockKeys[1]); |
|
68
|
7 |
|
$statement->execute(); |
|
69
|
|
|
|
|
70
|
7 |
|
return (bool) $statement->fetchColumn(); |
|
71
|
|
|
} |
|
72
|
|
|
} |
|
73
|
|
|
|
yiisoft /
mutex-pdo-pgsql
