2c1f94ebfab62f1bde390d7faaf40b0bd82b5fc6
[Packages/TYPO3.CMS.git] / typo3 / sysext / install / Classes / Configuration / ExtbaseObjectCache / ApcPreset.php
1 <?php
2 namespace TYPO3\CMS\Install\Configuration\ExtbaseObjectCache;
3
4 /***************************************************************
5 * Copyright notice
6 *
7 * (c) 2013 Christian Kuhn <lolli@schwarzbu.ch>
8 * All rights reserved
9 *
10 * This script is part of the TYPO3 project. The TYPO3 project is
11 * free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * The GNU General Public License can be found at
17 * http://www.gnu.org/copyleft/gpl.html.
18 *
19 * This script is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * This copyright notice MUST APPEAR in all copies of the script!
25 ***************************************************************/
26
27 use TYPO3\CMS\Install\Configuration;
28
29 /**
30 * APC preset
31 */
32 class ApcPreset extends Configuration\AbstractPreset {
33
34 /**
35 * @var string Name of preset
36 */
37 protected $name = 'Apc';
38
39 /**
40 * @var integer Priority of preset
41 */
42 protected $priority = 80;
43
44 /**
45 * @var array Configuration values handled by this preset
46 */
47 protected $configurationValues = array(
48 'SYS/caching/cacheConfigurations/extbase_object' => array(
49 'frontend' => 'TYPO3\CMS\Core\Cache\Frontend\VariableFrontend',
50 'backend' => 'TYPO3\CMS\Core\Cache\Backend\ApcBackend',
51 'options' => array(
52 'defaultLifetime' => 0,
53 ),
54 'groups' => array('system')
55 )
56 );
57
58 /**
59 * APC preset is available if extension is loaded, if APC has ~100MB
60 * memory and if ~5MB are free.
61 *
62 * @return boolean TRUE
63 */
64 public function isAvailable() {
65 $result = FALSE;
66 if (extension_loaded('apc')) {
67 $memoryInfo = @apc_sma_info();
68 $totalMemory = $memoryInfo['num_seg'] * $memoryInfo['seg_size'];
69 $availableMemory = $memoryInfo['avail_mem'];
70
71 // If more than 99MB in total and more than 5MB free
72 if ($totalMemory > (99 * 1024 * 1024)
73 && $availableMemory > (5 * 1024 * 1024)) {
74 $result = TRUE;
75 }
76 }
77 return $result;
78 }
79 }