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1 | <?php |
2 | /* | |
3 | +--------------------------------------------------------------------+ | |
232624b1 | 4 | | CiviCRM version 4.4 | |
6a488035 TO |
5 | +--------------------------------------------------------------------+ |
6 | | Copyright CiviCRM LLC (c) 2004-2013 | | |
7 | +--------------------------------------------------------------------+ | |
8 | | This file is a part of CiviCRM. | | |
9 | | | | |
10 | | CiviCRM is free software; you can copy, modify, and distribute it | | |
11 | | under the terms of the GNU Affero General Public License | | |
12 | | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. | | |
13 | | | | |
14 | | CiviCRM is distributed in the hope that it will be useful, but | | |
15 | | WITHOUT ANY WARRANTY; without even the implied warranty of | | |
16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | | |
17 | | See the GNU Affero General Public License for more details. | | |
18 | | | | |
19 | | You should have received a copy of the GNU Affero General Public | | |
20 | | License and the CiviCRM Licensing Exception along | | |
21 | | with this program; if not, contact CiviCRM LLC | | |
22 | | at info[AT]civicrm[DOT]org. If you have questions about the | | |
23 | | GNU Affero General Public License or the licensing of CiviCRM, | | |
24 | | see the CiviCRM license FAQ at http://civicrm.org/licensing | | |
25 | +--------------------------------------------------------------------+ | |
26 | */ | |
27 | ||
28 | /** | |
29 | * | |
30 | * @package CRM | |
31 | * @copyright CiviCRM LLC (c) 2004-2013 | |
32 | * $Id$ | |
33 | * | |
34 | */ | |
35 | ||
36 | /** | |
37 | * Cache is an empty base object, we'll modify the scheme when we have different caching schemes | |
38 | * | |
39 | */ | |
40 | class CRM_Utils_Cache { | |
41 | /** | |
42 | * We only need one instance of this object. So we use the singleton | |
43 | * pattern and cache the instance in this variable | |
44 | * | |
45 | * @var object | |
46 | * @static | |
47 | */ | |
48 | static private $_singleton = NULL; | |
49 | ||
50 | /** | |
51 | * Constructor | |
52 | * | |
53 | * @param array $config an array of configuration params | |
54 | * | |
55 | * @return void | |
56 | */ | |
57 | function __construct(&$config) { | |
58 | CRM_Core_Error::fatal(ts('this is just an interface and should not be called directly')); | |
59 | } | |
60 | ||
61 | /** | |
62 | * singleton function used to manage this object | |
63 | * | |
64 | * @return object | |
65 | * @static | |
66 | * | |
67 | */ | |
68 | static function &singleton() { | |
69 | if (self::$_singleton === NULL) { | |
70 | $className = 'ArrayCache'; // default to ArrayCache for now | |
71 | ||
72 | // Maintain backward compatibility for now. | |
73 | // Setting CIVICRM_USE_MEMCACHE or CIVICRM_USE_ARRAYCACHE will | |
74 | // override the CIVICRM_DB_CACHE_CLASS setting. | |
75 | // Going forward, CIVICRM_USE_xxxCACHE should be deprecated. | |
76 | if (defined('CIVICRM_USE_MEMCACHE') && CIVICRM_USE_MEMCACHE) { | |
77 | $className = 'Memcache'; | |
ee1d325f | 78 | } |
6a488035 TO |
79 | else if (defined('CIVICRM_USE_ARRAYCACHE') && CIVICRM_USE_ARRAYCACHE) { |
80 | $className = 'ArrayCache'; | |
ee1d325f | 81 | } |
6a488035 TO |
82 | else if (defined('CIVICRM_DB_CACHE_CLASS') && CIVICRM_DB_CACHE_CLASS) { |
83 | $className = CIVICRM_DB_CACHE_CLASS; | |
84 | } | |
85 | ||
86 | // a generic method for utilizing any of the available db caches. | |
87 | $dbCacheClass = 'CRM_Utils_Cache_' . $className; | |
88 | require_once(str_replace('_', DIRECTORY_SEPARATOR, $dbCacheClass) . '.php'); | |
89 | $settings = self::getCacheSettings($className); | |
90 | self::$_singleton = new $dbCacheClass($settings); | |
ee1d325f | 91 | } |
6a488035 TO |
92 | return self::$_singleton; |
93 | } | |
94 | ||
95 | /** | |
96 | * Get cache relevant settings | |
97 | * | |
98 | * @return array | |
99 | * associative array of settings for the cache | |
100 | * @static | |
101 | */ | |
102 | static function getCacheSettings($cachePlugin) { | |
103 | switch ($cachePlugin) { | |
104 | case 'ArrayCache': | |
105 | case 'NoCache': | |
106 | $defaults = array(); | |
107 | break; | |
108 | ||
109 | case 'Memcache': | |
110 | case 'Memcached': | |
111 | $defaults = array( | |
112 | 'host' => 'localhost', | |
113 | 'port' => 11211, | |
114 | 'timeout' => 3600, | |
115 | 'prefix' => '', | |
116 | ); | |
117 | ||
118 | // Use old constants if needed to ensure backward compatability | |
119 | if (defined('CIVICRM_MEMCACHE_HOST')) { | |
120 | $defaults['host'] = CIVICRM_MEMCACHE_HOST; | |
121 | } | |
122 | ||
123 | if (defined('CIVICRM_MEMCACHE_PORT')) { | |
124 | $defaults['port'] = CIVICRM_MEMCACHE_PORT; | |
125 | } | |
126 | ||
127 | if (defined('CIVICRM_MEMCACHE_TIMEOUT')) { | |
128 | $defaults['timeout'] = CIVICRM_MEMCACHE_TIMEOUT; | |
129 | } | |
130 | ||
131 | if (defined('CIVICRM_MEMCACHE_PREFIX')) { | |
132 | $defaults['prefix'] = CIVICRM_MEMCACHE_PREFIX; | |
133 | } | |
134 | ||
135 | // Use new constants if possible | |
136 | if (defined('CIVICRM_DB_CACHE_HOST')) { | |
137 | $defaults['host'] = CIVICRM_DB_CACHE_HOST; | |
138 | } | |
139 | ||
140 | if (defined('CIVICRM_DB_CACHE_PORT')) { | |
141 | $defaults['port'] = CIVICRM_DB_CACHE_PORT; | |
142 | } | |
143 | ||
144 | if (defined('CIVICRM_DB_CACHE_TIMEOUT')) { | |
145 | $defaults['timeout'] = CIVICRM_DB_CACHE_TIMEOUT; | |
146 | } | |
147 | ||
148 | if (defined('CIVICRM_DB_CACHE_PREFIX')) { | |
149 | $defaults['prefix'] = CIVICRM_DB_CACHE_PREFIX; | |
150 | } | |
151 | ||
152 | break; | |
153 | ||
154 | case 'APCcache': | |
155 | $defaults = array(); | |
156 | if (defined('CIVICRM_DB_CACHE_TIMEOUT')) { | |
157 | $defaults['timeout'] = CIVICRM_DB_CACHE_TIMEOUT; | |
158 | } | |
159 | if (defined('CIVICRM_DB_CACHE_PREFIX')) { | |
160 | $defaults['prefix'] = CIVICRM_DB_CACHE_PREFIX; | |
161 | } | |
162 | break; | |
163 | } | |
164 | return $defaults; | |
165 | } | |
166 | } |