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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
*
* Licensed under the Open Software License version 3.0
*
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
* http://opensource.org/licenses/OSL-3.0
* If you did not receive a copy of the license and are unable to obtain it
* through the world wide web, please send an email to
* licensing@ellislab.com so we can send you a copy immediately.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
* @link http://codeigniter.com
* @since Version 3.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* CodeIgniter Redis Caching Class
*
* @package CodeIgniter
* @subpackage Libraries
* @category Core
* @author Anton Lindqvist <anton@qvister.se>
* @link
*/
class CI_Cache_redis extends CI_Driver
{
/**
* Default config
*
* @static
* @var array
*/
protected static $_default_config = array(
'host' => '127.0.0.1',
'password' => NULL,
'port' => 6379,
'timeout' => 0
);
/**
* Redis connection
*
* @var Redis
*/
protected $_redis;
// ------------------------------------------------------------------------
/**
* Get cache
*
* @param string Cache key identifier
* @return mixed
*/
public function get($key)
{
return $this->_redis->get($key);
}
// ------------------------------------------------------------------------
/**
* Save cache
*
* @param string Cache key identifier
* @param mixed Data to save
* @param int Time to live
* @return bool
*/
public function save($key, $value, $ttl = NULL)
{
return ($ttl)
? $this->_redis->setex($key, $ttl, $value)
: $this->_redis->set($key, $value);
}
// ------------------------------------------------------------------------
/**
* Delete from cache
*
* @param string Cache key
* @return bool
*/
public function delete($key)
{
return ($this->_redis->delete($key) === 1);
}
// ------------------------------------------------------------------------
/**
* Clean cache
*
* @return bool
* @see Redis::flushDB()
*/
public function clean()
{
return $this->_redis->flushDB();
}
// ------------------------------------------------------------------------
/**
* Get cache driver info
*
* @param string Not supported in Redis.
* Only included in order to offer a
* consistent cache API.
* @return array
* @see Redis::info()
*/
public function cache_info($type = NULL)
{
return $this->_redis->info();
}
// ------------------------------------------------------------------------
/**
* Get cache metadata
*
* @param string Cache key
* @return array
*/
public function get_metadata($key)
{
$value = $this->get($key);
if ($value)
{
return array(
'expire' => time() + $this->_redis->ttl($key),
'data' => $value
);
}
return FALSE;
}
// ------------------------------------------------------------------------
/**
* Check if Redis driver is supported
*
* @return bool
*/
public function is_supported()
{
if (extension_loaded('redis'))
{
$this->_setup_redis();
return TRUE;
}
else
{
log_message('error', 'The Redis extension must be loaded to use Redis cache.');
return FALSE;
}
}
// ------------------------------------------------------------------------
/**
* Setup Redis config and connection
*
* Loads Redis config file if present. Will halt execution
* if a Redis connection can't be established.
*
* @return bool
* @see Redis::connect()
*/
protected function _setup_redis()
{
$config = array();
$CI =& get_instance();
if ($CI->config->load('redis', TRUE, TRUE))
{
$config += $CI->config->item('redis');
}
$config = array_merge(self::$_default_config, $config);
$this->_redis = new Redis();
try
{
$this->_redis->connect($config['host'], $config['port'], $config['timeout']);
}
catch (RedisException $e)
{
show_error('Redis connection refused. ' . $e->getMessage());
}
if (isset($config['password']))
{
$this->_redis->auth($config['password']);
}
}
// ------------------------------------------------------------------------
/**
* Class destructor
*
* Closes the connection to Redis if present.
*
* @return void
*/
public function __destruct()
{
if ($this->_redis)
{
$this->_redis->close();
}
}
}
/* End of file Cache_redis.php */
/* Location: ./system/libraries/Cache/drivers/Cache_redis.php */
|
