summaryrefslogtreecommitdiffstats
path: root/system/libraries/Cache/drivers/Cache_apc.php
blob: e82e8e1f59d2183195eb82a6e3bd03350a338a0f (plain)
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
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2006 - 2011 EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 2.0
 * @filesource	
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter APC Caching Class 
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Core
 * @author		ExpressionEngine Dev Team
 * @link		
 */

class Cache_apc extends CI_Driver {

	/**
	 * Get 
	 *
	 * Look for a value in the cache.  If it exists, return the data 
	 * if not, return FALSE
	 *
	 * @param 	string	
	 * @return 	mixed		value that is stored/FALSE on failure
	 */
	public function get($id)
	{
		$data = apc_fetch($id);

		return (is_array($data)) ? $data[0] : FALSE;
	}

	// ------------------------------------------------------------------------	
	
	/**
	 * Cache Save
	 *
	 * @param 	string		Unique Key
	 * @param 	mixed		Data to store
	 * @param 	int			Length of time (in seconds) to cache the data
	 *
	 * @return 	boolean		true on success/false on failure
	 */
	public function save($id, $data, $ttl = 60)
	{
		return apc_store($id, array($data, time(), $ttl), $ttl);
	}
	
	// ------------------------------------------------------------------------

	/**
	 * Delete from Cache
	 *
	 * @param 	mixed		unique identifier of the item in the cache
	 * @param 	boolean		true on success/false on failure
	 */
	public function delete($id)
	{
		return apc_delete($id);
	}

	// ------------------------------------------------------------------------

	/**
	 * Clean the cache
	 *
	 * @return 	boolean		false on failure/true on success
	 */
	public function clean()
	{
		return apc_clear_cache('user');
	}

	// ------------------------------------------------------------------------

	/**
	 * Cache Info
	 *
	 * @param 	string		user/filehits
	 * @return 	mixed		array on success, false on failure	
	 */
	 public function cache_info($type = NULL)
	 {
		 return apc_cache_info($type);
	 }

	// ------------------------------------------------------------------------

	/**
	 * Get Cache Metadata
	 *
	 * @param 	mixed		key to get cache metadata on
	 * @return 	mixed		array on success/false on failure
	 */
	public function get_metadata($id)
	{
		$stored = apc_fetch($id);

		if (count($stored) !== 3)
		{
			return FALSE;
		}

		list($value, $time, $ttl) = $stored;

		return array(
			'expire'	=> $time + $ttl,
			'mtime'		=> $time,
			'data'		=> $data
		);
	}

	// ------------------------------------------------------------------------

	/**
	 * is_supported()
	 *
	 * Check to see if APC is available on this system, bail if it isn't.
	 */
	public function is_supported()
	{
		if ( ! extension_loaded('apc') OR ! function_exists('apc_store'))
		{
			log_message('error', 'The APC PHP extension must be loaded to use APC Cache.');
			return FALSE;
		}
		
		return TRUE;
	}

	// ------------------------------------------------------------------------

	
}
// End Class

/* End of file Cache_apc.php */
/* Location: ./system/libraries/Cache/drivers/Cache_apc.php */