cache.inc.php
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<?php
/**
* $Id$
*
* KnowledgeTree Open Source Edition
* Document Management Made Simple
* Copyright (C) 2004 - 2008 The Jam Warehouse Software (Pty) Limited
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 3 as published by the
* Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* You can contact The Jam Warehouse Software (Pty) Limited, Unit 1, Tramber Place,
* Blake Street, Observatory, 7925 South Africa. or email info@knowledgetree.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU General Public License version 3.
*
* In accordance with Section 7(b) of the GNU General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* KnowledgeTree" logo and retain the original copyright notice. If the display of the
* logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
* must display the words "Powered by KnowledgeTree" and retain the original
* copyright notice.
* Contributor( s): ______________________________________
*/
class KTCache {
var $aRollbackList = array();
// {{{ getSingleton
static function &getSingleton () {
static $singleton = null;
if (is_null($singleton))
{
$singleton = new KTCache();
}
return $singleton;
}
// }}}
// takes an Entity type-name, and an array of the failed attrs.
function alertFailure($sEntityType, $aFail) {
$sMessage = sprintf('Failure in cache-comparison on type "%s": %s', $sEntityType, implode(', ', $aFail));
global $default;
$default->log->error($sMessage);
$_SESSION['KTErrorMessage'][] = $sMessage;
}
function KTCache() {
require_once("Cache/Lite.php");
require_once(KT_LIB_DIR . '/config/config.inc.php');
$aOptions = array();
$oKTConfig = KTConfig::getSingleton();
$this->bEnabled = $oKTConfig->get('cache/cacheEnabled', false);
if (empty($this->bEnabled)) {
return;
}
$aOptions['cacheDir'] = $oKTConfig->get('cache/cacheDirectory') . "/";
$user = KTLegacyLog::running_user();
if ($user) {
$aOptions['cacheDir'] .= $user . '/';
}
if (!file_exists($aOptions['cacheDir'])) {
mkdir($aOptions['cacheDir']);
}
// See thirdparty/pear/Cache/Lite.php to customize cache
$aOptions['lifeTime'] = 60;
$aOptions['memoryCaching'] = true;
$aOptions['automaticSerialization'] = true;
/* Patched line */
// Disable fileCaching (when cache > 5Mo)
$aOptions['onlyMemoryCaching'] = true;
$this->cacheDir = $aOptions['cacheDir'];
$this->oLite = new Cache_Lite($aOptions);
}
function get($group, $id) {
if (empty($this->bEnabled)) {
return array(false, false);
}
$stuff = $this->oLite->get($id, strtolower($group));
if (is_array($stuff)) {
return array(true, $stuff[0]);
}
return array(false, false);
}
function set($group, $id, $val) {
if (empty($this->bEnabled)) {
return false;
}
$this->aRollbackList[] = array($group, $id);
return $this->oLite->save(array($val), $id, strtolower($group));
}
function remove($group, $id) {
if (empty($this->bEnabled)) {
return false;
}
return $this->oLite->remove($id, strtolower($group));
}
function clear($group) {
if (empty($this->bEnabled)) {
return false;
}
return $this->oLite->clean(strtolower($group));
}
function rollback() {
// $this->deleteAllCaches();
foreach ($this->aRollbackList as $aRollbackItem) {
list($group, $id) = $aRollbackItem;
$this->remove($group, $id);
}
}
function startTransaction() {
$this->aRollbackList = array();
}
function commit() {
$this->aRollbackList = array();
}
function deleteAllCaches() {
if (empty($this->bEnabled)) {
return false;
}
$this->oLite->clean();
return;
$dir = $this->cacheDir;
$dh = @opendir($dir);
if (empty($dh)) {
return;
}
$aFiles = array();
while (false !== ($sFilename = readdir($dh))) {
if (substr($sFilename, 0, 6) == "cache_") {
$aFiles[] = sprintf('%s/%s', $dir, $sFilename);
}
}
foreach ($aFiles as $sFile) {
@unlink($sFile);
}
}
}
?>