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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
<?php
/**
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Michael Telatynski <7t3chguy@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Memcache;
use OCP\IMemcache;
class Redis extends Cache implements IMemcache {
/**
* @var \Redis $cache
*/
private static $cache = null;
public function __construct($prefix = '') {
parent::__construct($prefix);
if (is_null(self::$cache)) {
// TODO allow configuring a RedisArray, see https://github.com/nicolasff/phpredis/blob/master/arrays.markdown#redis-arrays
self::$cache = new \Redis();
$config = \OC::$server->getSystemConfig()->getValue('redis', array());
if (isset($config['host'])) {
$host = $config['host'];
} else {
$host = '127.0.0.1';
}
if (isset($config['port'])) {
$port = $config['port'];
} else {
$port = 6379;
}
if (isset($config['timeout'])) {
$timeout = $config['timeout'];
} else {
$timeout = 0.0; // unlimited
}
self::$cache->connect($host, $port, $timeout);
if(isset($config['password']) && $config['password'] !== '') {
self::$cache->auth($config['password']);
}
if (isset($config['dbindex'])) {
self::$cache->select($config['dbindex']);
}
}
}
/**
* entries in redis get namespaced to prevent collisions between ownCloud instances and users
*/
protected function getNameSpace() {
return $this->prefix;
}
public function get($key) {
$result = self::$cache->get($this->getNamespace() . $key);
if ($result === false && !self::$cache->exists($this->getNamespace() . $key)) {
return null;
} else {
return json_decode($result, true);
}
}
public function set($key, $value, $ttl = 0) {
if ($ttl > 0) {
return self::$cache->setex($this->getNamespace() . $key, $ttl, json_encode($value));
} else {
return self::$cache->set($this->getNamespace() . $key, json_encode($value));
}
}
public function hasKey($key) {
return self::$cache->exists($this->getNamespace() . $key);
}
public function remove($key) {
if (self::$cache->delete($this->getNamespace() . $key)) {
return true;
} else {
return false;
}
}
public function clear($prefix = '') {
$prefix = $this->getNamespace() . $prefix . '*';
$it = null;
self::$cache->setOption(\Redis::OPT_SCAN, \Redis::SCAN_RETRY);
while ($keys = self::$cache->scan($it, $prefix)) {
self::$cache->delete($keys);
}
return true;
}
/**
* Set a value in the cache if it's not already stored
*
* @param string $key
* @param mixed $value
* @param int $ttl Time To Live in seconds. Defaults to 60*60*24
* @return bool
*/
public function add($key, $value, $ttl = 0) {
// dont encode ints for inc/dec
if (!is_int($value)) {
$value = json_encode($value);
}
return self::$cache->setnx($this->getPrefix() . $key, $value);
}
/**
* Increase a stored number
*
* @param string $key
* @param int $step
* @return int | bool
*/
public function inc($key, $step = 1) {
return self::$cache->incrBy($this->getNamespace() . $key, $step);
}
/**
* Decrease a stored number
*
* @param string $key
* @param int $step
* @return int | bool
*/
public function dec($key, $step = 1) {
if (!$this->hasKey($key)) {
return false;
}
return self::$cache->decrBy($this->getNamespace() . $key, $step);
}
/**
* Compare and set
*
* @param string $key
* @param mixed $old
* @param mixed $new
* @return bool
*/
public function cas($key, $old, $new) {
if (!is_int($new)) {
$new = json_encode($new);
}
self::$cache->watch($this->getNamespace() . $key);
if ($this->get($key) === $old) {
$result = self::$cache->multi()
->set($this->getNamespace() . $key, $new)
->exec();
return ($result === false) ? false : true;
}
self::$cache->unwatch();
return false;
}
/**
* Compare and delete
*
* @param string $key
* @param mixed $old
* @return bool
*/
public function cad($key, $old) {
self::$cache->watch($this->getNamespace() . $key);
if ($this->get($key) === $old) {
$result = self::$cache->multi()
->del($this->getNamespace() . $key)
->exec();
return ($result === false) ? false : true;
}
self::$cache->unwatch();
return false;
}
static public function isAvailable() {
return extension_loaded('redis')
&& version_compare(phpversion('redis'), '2.2.5', '>=');
}
}
|
