cache.inc.php
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<?php
/**
* $Id$
*
* The contents of this file are subject to the KnowledgeTree Public
* License Version 1.1.2 ("License"); You may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.knowledgetree.com/KPL
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the License for the specific language governing rights and
* limitations under the License.
*
* All copies of the Covered Code must include on each user interface screen:
* (i) the "Powered by KnowledgeTree" logo and
* (ii) the KnowledgeTree copyright notice
* in the same form as they appear in the distribution. See the License for
* requirements.
*
* The Original Code is: KnowledgeTree Open Source
*
* The Initial Developer of the Original Code is The Jam Warehouse Software
* (Pty) Ltd, trading as KnowledgeTree.
* Portions created by The Jam Warehouse Software (Pty) Ltd are Copyright
* (C) 2007 The Jam Warehouse Software (Pty) Ltd;
* All Rights Reserved.
* Contributor( s): ______________________________________
*/
class KTCache {
var $aRollbackList = array();
// {{{ getSingleton
function &getSingleton () {
if (!KTUtil::arrayGet($GLOBALS, 'oKTCache')) {
$GLOBALS['oKTCache'] = new KTCache;
}
return $GLOBALS['oKTCache'];
}
// }}}
// takes an Entity type-name, and an array of the failed attrs.
function alertFailure($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']);
}
$aOptions['lifeTime'] = 60;
$aOptions['memoryCaching'] = true;
$aOptions['automaticSerialization'] = 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);
}
}
}
?>