| 1 | <?php |
| 2 | /* |
| 3 | +--------------------------------------------------------------------+ |
| 4 | | CiviCRM version 4.3 | |
| 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 | * This caching provider stores all cached items as a "group" in the |
| 38 | * "civicrm_cache" table. The entire 'group' may be prefetched when |
| 39 | * instantiating the cache provider. |
| 40 | */ |
| 41 | class CRM_Utils_Cache_SqlGroup implements CRM_Utils_Cache_Interface { |
| 42 | |
| 43 | /** |
| 44 | * The host name of the memcached server |
| 45 | * |
| 46 | * @var string |
| 47 | */ |
| 48 | protected $group; |
| 49 | |
| 50 | /** |
| 51 | * @var int $componentID The optional component ID (so componenets can share the same name space) |
| 52 | */ |
| 53 | protected $componentID; |
| 54 | |
| 55 | /** |
| 56 | * @var array in-memory cache to optimize redundant get()s |
| 57 | */ |
| 58 | protected $frontCache; |
| 59 | |
| 60 | /** |
| 61 | * Constructor |
| 62 | * |
| 63 | * @param array $config an array of configuration params |
| 64 | * - group: string |
| 65 | * - componentID: int |
| 66 | * - prefetch: bool, whether to preemptively read the entire cache group; default: TRUE |
| 67 | * |
| 68 | * @return void |
| 69 | */ |
| 70 | function __construct($config) { |
| 71 | if (isset($config['group'])) { |
| 72 | $this->group = $config['group']; |
| 73 | } else { |
| 74 | throw new RuntimeException("Cannot construct SqlGroup cache: missing group"); |
| 75 | } |
| 76 | if (isset($config['componentID'])) { |
| 77 | $this->componentID = $config['componentID']; |
| 78 | } else { |
| 79 | $this->componentID = NULL; |
| 80 | } |
| 81 | $this->frontCache = array(); |
| 82 | if (CRM_Utils_Array::value('prefetch', $config, TRUE)) { |
| 83 | $this->prefetch(); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | function set($key, &$value) { |
| 88 | CRM_Core_BAO_Cache::setItem($value, $this->group, $key, $this->componentID); |
| 89 | $this->frontCache[$key] = $value; |
| 90 | } |
| 91 | |
| 92 | function get($key) { |
| 93 | if (! array_key_exists($key, $this->frontCache)) { |
| 94 | $this->frontCache[$key] = CRM_Core_BAO_Cache::getItem($this->group, $key, $this->componentID); |
| 95 | } |
| 96 | return $this->frontCache[$key]; |
| 97 | } |
| 98 | |
| 99 | function getFromFrontCache($key, $default = NULL) { |
| 100 | return CRM_Utils_Array::value($key, $this->frontCache, $default); |
| 101 | } |
| 102 | |
| 103 | function delete($key) { |
| 104 | CRM_Core_BAO_Cache::deleteGroup($this->group, $key); |
| 105 | unset($this->frontCache[$key]); |
| 106 | } |
| 107 | |
| 108 | function flush() { |
| 109 | CRM_Core_BAO_Cache::deleteGroup($this->group); |
| 110 | $this->frontCache = array(); |
| 111 | } |
| 112 | |
| 113 | function prefetch() { |
| 114 | $this->frontCache = CRM_Core_BAO_Cache::getItems($this->group, $this->componentID); |
| 115 | } |
| 116 | } |