<?php
class PHPExcel_CachedObjectStorage_APC extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
private $_cachePrefix = null;
private $_cacheTime = 600;
protected function _storeData() {
if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) {
$this->_currentObject->detach();
if (!apc_store($this->_cachePrefix.$this->_currentObjectID.'.cache',serialize($this->_currentObject),$this->_cacheTime)) {
$this->__destruct();
throw new PHPExcel_Exception('Failed to store cell '.$this->_currentObjectID.' in APC');
}
$this->_currentCellIsDirty = false;
}
$this->_currentObjectID = $this->_currentObject = null;
}
public function addCacheData($pCoord, PHPExcel_Cell $cell) {
if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
$this->_storeData();
}
$this->_cellCache[$pCoord] = true;
$this->_currentObjectID = $pCoord;
$this->_currentObject = $cell;
$this->_currentCellIsDirty = true;
return $cell;
}
public function isDataSet($pCoord) {
if (parent::isDataSet($pCoord)) {
if ($this->_currentObjectID == $pCoord) {
return true;
}
$success = apc_fetch($this->_cachePrefix.$pCoord.'.cache');
if ($success === FALSE) {
parent::deleteCacheData($pCoord);
throw new PHPExcel_Exception('Cell entry '.$pCoord.' no longer exists in APC cache');
}
return true;
}
return false;
}
public function getCacheData($pCoord) {
if ($pCoord === $this->_currentObjectID) {
return $this->_currentObject;
}
$this->_storeData();
if (parent::isDataSet($pCoord)) {
$obj = apc_fetch($this->_cachePrefix.$pCoord.'.cache');
if ($obj === FALSE) {
parent::deleteCacheData($pCoord);
throw new PHPExcel_Exception('Cell entry '.$pCoord.' no longer exists in APC cache');
}
} else {
return null;
}
$this->_currentObjectID = $pCoord;
$this->_currentObject = unserialize($obj);
$this->_currentObject->attach($this);
return $this->_currentObject;
}
public function getCellList() {
if ($this->_currentObjectID !== null) {
$this->_storeData();
}
return parent::getCellList();
}
public function deleteCacheData($pCoord) {
apc_delete($this->_cachePrefix.$pCoord.'.cache');
parent::deleteCacheData($pCoord);
}
public function copyCellCollection(PHPExcel_Worksheet $parent) {
parent::copyCellCollection($parent);
$baseUnique = $this->_getUniqueID();
$newCachePrefix = substr(md5($baseUnique),0,8).'.';
$cacheList = $this->getCellList();
foreach($cacheList as $cellID) {
if ($cellID != $this->_currentObjectID) {
$obj = apc_fetch($this->_cachePrefix.$cellID.'.cache');
if ($obj === FALSE) {
parent::deleteCacheData($cellID);
throw new PHPExcel_Exception('Cell entry '.$cellID.' no longer exists in APC');
}
if (!apc_store($newCachePrefix.$cellID.'.cache',$obj,$this->_cacheTime)) {
$this->__destruct();
throw new PHPExcel_Exception('Failed to store cell '.$cellID.' in APC');
}
}
}
$this->_cachePrefix = $newCachePrefix;
}
public function unsetWorksheetCells() {
if ($this->_currentObject !== NULL) {
$this->_currentObject->detach();
$this->_currentObject = $this->_currentObjectID = null;
}
$this->__destruct();
$this->_cellCache = array();
$this->_parent = null;
}
public function __construct(PHPExcel_Worksheet $parent, $arguments) {
$cacheTime = (isset($arguments['cacheTime'])) ? $arguments['cacheTime'] : 600;
if ($this->_cachePrefix === NULL) {
$baseUnique = $this->_getUniqueID();
$this->_cachePrefix = substr(md5($baseUnique),0,8).'.';
$this->_cacheTime = $cacheTime;
parent::__construct($parent);
}
}
public function __destruct() {
$cacheList = $this->getCellList();
foreach($cacheList as $cellID) {
apc_delete($this->_cachePrefix.$cellID.'.cache');
}
}
public static function cacheMethodIsAvailable() {
if (!function_exists('apc_store')) {
return FALSE;
}
if (apc_sma_info() === FALSE) {
return FALSE;
}
return TRUE;
}
}