|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Tourstream\RedisLockStrategy; |
|
4
|
|
|
|
|
5
|
|
|
/*************************************************************** |
|
6
|
|
|
* Copyright notice |
|
7
|
|
|
* |
|
8
|
|
|
* (c) 2017 Alexander Miehe ([email protected]) |
|
9
|
|
|
* All rights reserved |
|
10
|
|
|
* |
|
11
|
|
|
* You may not remove or change the name of the author above. See: |
|
12
|
|
|
* http://www.gnu.org/licenses/gpl-faq.html#IWantCredit |
|
13
|
|
|
* |
|
14
|
|
|
* This script is part of the Typo3 project. The Typo3 project is |
|
15
|
|
|
* free software; you can redistribute it and/or modify |
|
16
|
|
|
* it under the terms of the GNU General Public License as published by |
|
17
|
|
|
* the Free Software Foundation; either version 3 of the License, or |
|
18
|
|
|
* (at your option) any later version. |
|
19
|
|
|
* |
|
20
|
|
|
* The GNU General Public License can be found at |
|
21
|
|
|
* http://www.gnu.org/copyleft/gpl.html. |
|
22
|
|
|
* A copy is found in the LICENSE and distributed with these scripts. |
|
23
|
|
|
* |
|
24
|
|
|
* |
|
25
|
|
|
* This script is distributed in the hope that it will be useful, |
|
26
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
27
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
28
|
|
|
* GNU General Public License for more details. |
|
29
|
|
|
* |
|
30
|
|
|
* This copyright notice MUST APPEAR in all copies of the script! |
|
31
|
|
|
***************************************************************/ |
|
32
|
|
|
|
|
33
|
|
|
use TYPO3\CMS\Core\Locking\Exception; |
|
34
|
|
|
use TYPO3\CMS\Core\Locking\LockingStrategyInterface; |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* @author Alexander Miehe <[email protected]> |
|
38
|
|
|
*/ |
|
39
|
|
|
class RedisLockStrategy implements LockingStrategyInterface |
|
40
|
|
|
{ |
|
41
|
|
|
/** |
|
42
|
|
|
* @var \Redis |
|
43
|
|
|
*/ |
|
44
|
|
|
private $redis; |
|
45
|
|
|
|
|
46
|
|
|
/** |
|
47
|
|
|
* @var string |
|
48
|
|
|
*/ |
|
49
|
|
|
private $subject; |
|
50
|
|
|
|
|
51
|
|
|
/** |
|
52
|
|
|
* @var int |
|
53
|
|
|
*/ |
|
54
|
|
|
private $ttl; |
|
55
|
|
|
|
|
56
|
|
|
/** |
|
57
|
|
|
* @inheritdoc |
|
58
|
|
|
*/ |
|
59
|
|
|
public function __construct($subject) |
|
60
|
|
|
{ |
|
61
|
|
|
$config = null; |
|
62
|
|
|
|
|
63
|
|
|
if (\array_key_exists('redis_lock', $GLOBALS['TYPO3_CONF_VARS']['SYS'])) { |
|
64
|
|
|
$config = $GLOBALS['TYPO3_CONF_VARS']['SYS']['redis_lock']; |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
|
|
if (!\is_array($config)) { |
|
68
|
|
|
throw new Exception('no configuration for redis lock strategy found'); |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
if (!\array_key_exists('host', $config)) { |
|
72
|
|
|
throw new Exception('no host for redis lock strategy found'); |
|
73
|
|
|
} |
|
74
|
|
|
$port = 6379; |
|
75
|
|
|
|
|
76
|
|
|
if (\array_key_exists('port', $config)) { |
|
77
|
|
|
$port = (int)$config['port']; |
|
78
|
|
|
} |
|
79
|
|
|
|
|
80
|
|
|
if (!\array_key_exists('database', $config)) { |
|
81
|
|
|
throw new Exception('no database for redis lock strategy found'); |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
$this->ttl = 360; |
|
85
|
|
|
if (\array_key_exists('ttl', $config)) { |
|
86
|
|
|
$this->ttl = (int)$config['ttl']; |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
$this->subject = $subject; |
|
90
|
|
|
$this->redis = new \Redis(); |
|
91
|
|
|
$this->redis->connect($config['host'], $port); |
|
92
|
|
|
|
|
93
|
|
|
if (\array_key_exists('auth', $config)) { |
|
94
|
|
|
$this->redis->auth($config['auth']); |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
$this->redis->select((int)$config['database']); |
|
98
|
|
|
} |
|
99
|
|
|
|
|
100
|
|
|
/** |
|
101
|
|
|
* @inheritdoc |
|
102
|
|
|
*/ |
|
103
|
|
|
public static function getCapabilities() |
|
104
|
|
|
{ |
|
105
|
|
|
return self::LOCK_CAPABILITY_EXCLUSIVE | self::LOCK_CAPABILITY_NOBLOCK; |
|
106
|
|
|
} |
|
107
|
|
|
|
|
108
|
|
|
/** |
|
109
|
|
|
* @inheritdoc |
|
110
|
|
|
*/ |
|
111
|
|
|
public static function getPriority() |
|
112
|
|
|
{ |
|
113
|
|
|
return 100; |
|
114
|
|
|
} |
|
115
|
|
|
|
|
116
|
|
|
/** |
|
117
|
|
|
* @inheritdoc |
|
118
|
|
|
*/ |
|
119
|
|
|
public function acquire($mode = self::LOCK_CAPABILITY_EXCLUSIVE) |
|
120
|
|
|
{ |
|
121
|
|
|
if ($this->isAcquired()) { |
|
122
|
|
|
return true; |
|
123
|
|
|
} |
|
124
|
|
|
|
|
125
|
|
|
return $this->redis->set($this->subject, uniqid(), $this->ttl); |
|
126
|
|
|
} |
|
127
|
|
|
|
|
128
|
|
|
/** |
|
129
|
|
|
* @inheritdoc |
|
130
|
|
|
*/ |
|
131
|
|
|
public function isAcquired() |
|
132
|
|
|
{ |
|
133
|
|
|
return $this->redis->exists($this->subject); |
|
134
|
|
|
} |
|
135
|
|
|
|
|
136
|
|
|
/** |
|
137
|
|
|
* @inheritdoc |
|
138
|
|
|
*/ |
|
139
|
|
|
public function destroy() |
|
140
|
|
|
{ |
|
141
|
|
|
$this->release(); |
|
142
|
|
|
} |
|
143
|
|
|
|
|
144
|
|
|
/** |
|
145
|
|
|
* @inheritdoc |
|
146
|
|
|
*/ |
|
147
|
|
|
public function release() |
|
148
|
|
|
{ |
|
149
|
|
|
if (!$this->isAcquired()) { |
|
150
|
|
|
return true; |
|
151
|
|
|
} |
|
152
|
|
|
|
|
153
|
|
|
return $this->redis->del($this->subject) === 1; |
|
154
|
|
|
} |
|
155
|
|
|
|
|
156
|
|
|
} |
tourstream /
typo3-redis-lock-strategy
