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GeneralCache.php
1 <?php
2  /*********************************************************************************
3  * Zurmo is a customer relationship management program developed by
4  * Zurmo, Inc. Copyright (C) 2017 Zurmo Inc.
5  *
6  * Zurmo is free software; you can redistribute it and/or modify it under
7  * the terms of the GNU Affero General Public License version 3 as published by the
8  * Free Software Foundation with the addition of the following permission added
9  * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
10  * IN WHICH THE COPYRIGHT IS OWNED BY ZURMO, ZURMO DISCLAIMS THE WARRANTY
11  * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
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13  * Zurmo is distributed in the hope that it will be useful, but WITHOUT
14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15  * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
16  * details.
17  *
18  * You should have received a copy of the GNU Affero General Public License along with
19  * this program; if not, see http://www.gnu.org/licenses or write to the Free
20  * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21  * 02110-1301 USA.
22  *
23  * You can contact Zurmo, Inc. with a mailing address at 27 North Wacker Drive
24  * Suite 370 Chicago, IL 60606. or at email address contact@zurmo.com.
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27  * of this program must display Appropriate Legal Notices, as required under
28  * Section 5 of the GNU Affero General Public License version 3.
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30  * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
31  * these Appropriate Legal Notices must retain the display of the Zurmo
32  * logo and Zurmo copyright notice. If the display of the logo is not reasonably
33  * feasible for technical reasons, the Appropriate Legal Notices must display the words
34  * "Copyright Zurmo Inc. 2017. All rights reserved".
35  ********************************************************************************/
36 
41  abstract class GeneralCache extends ZurmoCache
42  {
43  protected static $cachedEntries = array();
44 
45  public static $cacheType = 'G:';
46 
47  public static function getEntry($identifier, $default = 'NOT_FOUND_EXCEPTION', $cacheDefaultValue = false)
48  {
49  assert('is_string($identifier)');
50  if (static::supportsAndAllowsPhpCaching())
51  {
52  if (isset(static::$cachedEntries[$identifier]))
53  {
54  return static::$cachedEntries[$identifier];
55  }
56  }
57  if (static::supportsAndAllowsMemcache())
58  {
59  $prefix = static::getCachePrefix($identifier);
60  // Why we ignore errors in line below? Maybe because it is possible that memcache servers are not reachable
61  @$data = static::getCachedValueAndValidateChecksum($prefix . $identifier);
62  if ($data !== false)
63  {
64  if (static::supportsAndAllowsPhpCaching())
65  {
66  static::$cachedEntries[$identifier] = $data;
67  }
68  return $data;
69  }
70  }
71  if ($default === 'NOT_FOUND_EXCEPTION')
72  {
73  throw new NotFoundException();
74  }
75  else
76  {
77  if ($cacheDefaultValue)
78  {
79  static::cacheEntry($identifier, $default);
80  }
81  return $default;
82  }
83  }
84 
85  public static function cacheEntry($identifier, $entry)
86  {
87  assert('is_string($identifier)');
88  assert('is_string($entry) || is_bool($entry) || is_array($entry) || is_numeric($entry) || is_object($entry) || $entry == null');
89  if (static::supportsAndAllowsPhpCaching())
90  {
91  static::$cachedEntries[$identifier] = $entry;
92  }
93  if (static::supportsAndAllowsMemcache())
94  {
95  $prefix = static::getCachePrefix($identifier);
96  // Why we ignore errors in line below? Maybe because it is possible that memcache servers are not reachable
97  @static::cacheValueAndChecksum($prefix . $identifier, $entry);
98  }
99  }
100 
101  public static function forgetEntry($identifier)
102  {
103  if (static::supportsAndAllowsPhpCaching())
104  {
105  if (isset(static::$cachedEntries[$identifier]))
106  {
107  unset(static::$cachedEntries[$identifier]);
108  }
109  }
110  if (static::supportsAndAllowsMemcache())
111  {
112  $prefix = static::getCachePrefix($identifier);
113  @Yii::app()->cache->delete($prefix . $identifier);
114  }
115  }
116 
117  public static function forgetAll()
118  {
119  if (static::supportsAndAllowsPhpCaching())
120  {
121  static::$cachedEntries = array();
122  }
123  static::clearMemcacheCache();
124  }
125  }
126 ?>
Generated on Thu Apr 2 2020 07:10:38