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1 | <?php |
2 | /* | |
3 | +--------------------------------------------------------------------+ | |
fee14197 | 4 | | CiviCRM version 5 | |
6a488035 | 5 | +--------------------------------------------------------------------+ |
8c9251b3 | 6 | | Copyright CiviCRM LLC (c) 2004-2018 | |
6a488035 TO |
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 | +--------------------------------------------------------------------+ | |
d25dd0ee | 26 | */ |
6a488035 TO |
27 | |
28 | /** | |
29 | * | |
30 | * @package CRM | |
8c9251b3 | 31 | * @copyright CiviCRM LLC (c) 2004-2018 |
6a488035 | 32 | */ |
9f49773e | 33 | class CRM_Utils_Cache_Memcache implements CRM_Utils_Cache_Interface { |
0d64c8fa TO |
34 | |
35 | use CRM_Utils_Cache_NaiveMultipleTrait; // TODO Consider native implementation. | |
36 | ||
353ffa53 TO |
37 | const DEFAULT_HOST = 'localhost'; |
38 | const DEFAULT_PORT = 11211; | |
6a488035 | 39 | const DEFAULT_TIMEOUT = 3600; |
353ffa53 | 40 | const DEFAULT_PREFIX = ''; |
6a488035 | 41 | |
fbbfd6dd TO |
42 | /** |
43 | * If another process clears namespace, we'll find out in ~5 sec. | |
44 | */ | |
45 | const NS_LOCAL_TTL = 5; | |
46 | ||
6a488035 | 47 | /** |
fe482240 | 48 | * The host name of the memcached server. |
6a488035 TO |
49 | * |
50 | * @var string | |
51 | */ | |
52 | protected $_host = self::DEFAULT_HOST; | |
53 | ||
54 | /** | |
fe482240 | 55 | * The port on which to connect on. |
6a488035 TO |
56 | * |
57 | * @var int | |
58 | */ | |
59 | protected $_port = self::DEFAULT_PORT; | |
60 | ||
61 | /** | |
fe482240 | 62 | * The default timeout to use. |
6a488035 TO |
63 | * |
64 | * @var int | |
65 | */ | |
66 | protected $_timeout = self::DEFAULT_TIMEOUT; | |
67 | ||
68 | /** | |
69 | * The prefix prepended to cache keys. | |
70 | * | |
71 | * If we are using the same memcache instance for multiple CiviCRM | |
72 | * installs, we must have a unique prefix for each install to prevent | |
73 | * the keys from clobbering each other. | |
74 | * | |
75 | * @var string | |
76 | */ | |
77 | protected $_prefix = self::DEFAULT_PREFIX; | |
78 | ||
79 | /** | |
fe482240 | 80 | * The actual memcache object. |
6a488035 | 81 | * |
41e0c250 | 82 | * @var Memcache |
6a488035 TO |
83 | */ |
84 | protected $_cache; | |
85 | ||
fbbfd6dd TO |
86 | /** |
87 | * @var NULL|array | |
88 | * | |
89 | * This is the effective prefix. It may be bumped up whenever the dataset is flushed. | |
90 | * | |
91 | * @see https://github.com/memcached/memcached/wiki/ProgrammingTricks#deleting-by-namespace | |
92 | */ | |
93 | protected $_truePrefix = NULL; | |
94 | ||
6a488035 | 95 | /** |
fe482240 | 96 | * Constructor. |
6a488035 | 97 | * |
77855840 TO |
98 | * @param array $config |
99 | * An array of configuration params. | |
6a488035 | 100 | * |
77b97be7 | 101 | * @return \CRM_Utils_Cache_Memcache |
6a488035 | 102 | */ |
00be9182 | 103 | public function __construct($config) { |
6a488035 TO |
104 | if (isset($config['host'])) { |
105 | $this->_host = $config['host']; | |
106 | } | |
107 | if (isset($config['port'])) { | |
108 | $this->_port = $config['port']; | |
109 | } | |
110 | if (isset($config['timeout'])) { | |
111 | $this->_timeout = $config['timeout']; | |
112 | } | |
113 | if (isset($config['prefix'])) { | |
114 | $this->_prefix = $config['prefix']; | |
115 | } | |
116 | ||
117 | $this->_cache = new Memcache(); | |
118 | ||
119 | if (!$this->_cache->connect($this->_host, $this->_port)) { | |
120 | // dont use fatal here since we can go in an infinite loop | |
121 | echo 'Could not connect to Memcached server'; | |
122 | CRM_Utils_System::civiExit(); | |
123 | } | |
124 | } | |
125 | ||
5bc392e6 EM |
126 | /** |
127 | * @param $key | |
128 | * @param $value | |
858451a9 | 129 | * @param null|int|\DateInterval $ttl |
5bc392e6 EM |
130 | * |
131 | * @return bool | |
132 | */ | |
858451a9 | 133 | public function set($key, $value, $ttl = NULL) { |
fbbfd6dd TO |
134 | CRM_Utils_Cache::assertValidKey($key); |
135 | if (is_int($ttl) && $ttl <= 0) { | |
136 | return $this->delete($key); | |
6a488035 | 137 | } |
fbbfd6dd TO |
138 | $expires = CRM_Utils_Date::convertCacheTtlToExpires($ttl, $this->_timeout); |
139 | return $this->_cache->set($this->getTruePrefix() . $key, serialize($value), FALSE, $expires); | |
6a488035 TO |
140 | } |
141 | ||
5bc392e6 EM |
142 | /** |
143 | * @param $key | |
2da67cc5 | 144 | * @param mixed $default |
5bc392e6 EM |
145 | * |
146 | * @return mixed | |
147 | */ | |
2da67cc5 | 148 | public function get($key, $default = NULL) { |
fbbfd6dd TO |
149 | CRM_Utils_Cache::assertValidKey($key); |
150 | $result = $this->_cache->get($this->getTruePrefix() . $key); | |
151 | return ($result === FALSE) ? $default : unserialize($result); | |
6a488035 TO |
152 | } |
153 | ||
fbbfd6dd TO |
154 | /** |
155 | * @param string $key | |
156 | * | |
157 | * @return bool | |
158 | * @throws \Psr\SimpleCache\CacheException | |
159 | */ | |
160 | public function has($key) { | |
161 | CRM_Utils_Cache::assertValidKey($key); | |
162 | $result = $this->_cache->get($this->getTruePrefix() . $key); | |
163 | return ($result !== FALSE); | |
164 | } | |
165 | ||
166 | ||
5bc392e6 EM |
167 | /** |
168 | * @param $key | |
169 | * | |
eec321a4 | 170 | * @return bool |
5bc392e6 | 171 | */ |
00be9182 | 172 | public function delete($key) { |
fbbfd6dd TO |
173 | CRM_Utils_Cache::assertValidKey($key); |
174 | $this->_cache->delete($this->getTruePrefix() . $key); | |
175 | return TRUE; | |
6a488035 TO |
176 | } |
177 | ||
5bc392e6 | 178 | /** |
124e5288 | 179 | * @return bool |
5bc392e6 | 180 | */ |
00be9182 | 181 | public function flush() { |
fbbfd6dd TO |
182 | $this->_truePrefix = NULL; |
183 | $this->_cache->delete($this->_prefix); | |
184 | return TRUE; | |
6a488035 | 185 | } |
96025800 | 186 | |
c31de879 TO |
187 | public function clear() { |
188 | return $this->flush(); | |
189 | } | |
190 | ||
fbbfd6dd TO |
191 | protected function getTruePrefix() { |
192 | if ($this->_truePrefix === NULL || $this->_truePrefix['expires'] < time()) { | |
193 | $key = $this->_prefix; | |
194 | $value = $this->_cache->get($key); | |
195 | if ($value === FALSE) { | |
196 | $value = uniqid(); | |
197 | $this->_cache->set($key, $value, FALSE, 0); // Indefinite. | |
198 | } | |
199 | $this->_truePrefix = [ | |
200 | 'value' => $value, | |
201 | 'expires' => time() + self::NS_LOCAL_TTL, | |
202 | ]; | |
203 | } | |
204 | return $this->_prefix . $this->_truePrefix['value'] . '/'; | |
205 | } | |
206 | ||
6a488035 | 207 | } |