|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Cozy\Database\Relational; |
|
6
|
|
|
|
|
7
|
|
|
use Cozy\Database\Relational\Configuration\ConfigurationInterface; |
|
8
|
|
|
|
|
9
|
|
|
class ConnectionPool |
|
10
|
|
|
{ |
|
11
|
|
|
/** @var array */ |
|
12
|
|
|
private $pool = []; |
|
13
|
|
|
/** @var Connection */ |
|
14
|
|
|
private $current; |
|
15
|
|
|
private $selectionOrder = 1; |
|
16
|
|
|
const SELECTION_RANDOM = 1; |
|
17
|
|
|
const SELECTION_SEQUENTIAL = 2; |
|
18
|
|
|
|
|
19
|
|
|
public function __construct(int $selection_order = self::SELECTION_RANDOM) |
|
20
|
|
|
{ |
|
21
|
|
|
$this->selectionOrder = $selection_order; |
|
22
|
|
|
} |
|
23
|
|
|
|
|
24
|
|
|
public function addConfiguration(ConfigurationInterface $configuration, string $tag = 'main') |
|
25
|
|
|
{ |
|
26
|
|
|
if (!isset($this->pool[$tag])) { |
|
27
|
|
|
$this->pool[$tag] = []; |
|
28
|
|
|
} |
|
29
|
|
|
|
|
30
|
|
|
$this->pool[$tag][] = $configuration; |
|
31
|
|
|
} |
|
32
|
|
|
|
|
33
|
|
|
public function getConnection(string $tag = 'main'): Connection |
|
34
|
|
|
{ |
|
35
|
|
|
if (isset($this->current[$tag]) && $this->current[$tag] instanceof Connection) { |
|
36
|
|
|
if ($this->current[$tag]->isAlive()) { |
|
37
|
|
|
return $this->current[$tag]; |
|
38
|
|
|
} else { |
|
39
|
|
|
$this->current[$tag] = null; |
|
40
|
|
|
} |
|
41
|
|
|
} |
|
42
|
|
|
|
|
43
|
|
|
if (empty($this->pool[$tag])) { |
|
44
|
|
|
throw new Exception('There are no available configurations in the connection pool.', 'CZ097'); |
|
45
|
|
|
} |
|
46
|
|
|
|
|
47
|
|
|
if ($this->selectionOrder == self::SELECTION_RANDOM) { |
|
48
|
|
|
shuffle($this->pool[$tag]); |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
$configuration = array_shift($this->pool[$tag]); |
|
52
|
|
|
|
|
53
|
|
|
while ($configuration !== null) { |
|
54
|
|
|
if ($configuration->isValid()) { |
|
55
|
|
|
$this->current[$tag] = $configuration->buildConnection(); |
|
56
|
|
|
break; |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
|
|
$configuration = array_shift($this->pool[$tag]); |
|
60
|
|
|
} |
|
61
|
|
|
|
|
62
|
|
|
if (!isset($this->current[$tag])) { |
|
63
|
|
|
throw new Exception('There are no valid configurations to build a database connection.', 'CZ098'); |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
|
|
return $this->current[$tag]; |
|
67
|
|
|
} |
|
68
|
|
|
} |
|
69
|
|
|
|
cozyframework /
database
