3d7153c7f4
git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@88175 2327b42d-5241-43d6-9e2a-de5ac946f064
299 lines
9.3 KiB
PHP
299 lines
9.3 KiB
PHP
<?php
|
|
/**
|
|
* PHPExcel
|
|
*
|
|
* Copyright (c) 2006 - 2012 PHPExcel
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* @category PHPExcel
|
|
* @package PHPExcel_CachedObjectStorage
|
|
* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
|
|
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
|
|
* @version ##VERSION##, ##DATE##
|
|
*/
|
|
|
|
|
|
/**
|
|
* PHPExcel_CachedObjectStorage_Memcache
|
|
*
|
|
* @category PHPExcel
|
|
* @package PHPExcel_CachedObjectStorage
|
|
* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
|
|
*/
|
|
class PHPExcel_CachedObjectStorage_Memcache extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
|
|
|
|
/**
|
|
* Prefix used to uniquely identify cache data for this worksheet
|
|
*
|
|
* @var string
|
|
*/
|
|
private $_cachePrefix = null;
|
|
|
|
/**
|
|
* Cache timeout
|
|
*
|
|
* @var integer
|
|
*/
|
|
private $_cacheTime = 600;
|
|
|
|
/**
|
|
* Memcache interface
|
|
*
|
|
* @var resource
|
|
*/
|
|
private $_memcache = null;
|
|
|
|
|
|
/**
|
|
* Store cell data in cache for the current cell object if it's "dirty",
|
|
* and the 'nullify' the current cell object
|
|
*
|
|
* @return void
|
|
* @throws Exception
|
|
*/
|
|
private function _storeData() {
|
|
if ($this->_currentCellIsDirty) {
|
|
$this->_currentObject->detach();
|
|
|
|
$obj = serialize($this->_currentObject);
|
|
if (!$this->_memcache->replace($this->_cachePrefix.$this->_currentObjectID.'.cache',$obj,NULL,$this->_cacheTime)) {
|
|
if (!$this->_memcache->add($this->_cachePrefix.$this->_currentObjectID.'.cache',$obj,NULL,$this->_cacheTime)) {
|
|
$this->__destruct();
|
|
throw new Exception('Failed to store cell '.$this->_currentObjectID.' in MemCache');
|
|
}
|
|
}
|
|
$this->_currentCellIsDirty = false;
|
|
}
|
|
$this->_currentObjectID = $this->_currentObject = null;
|
|
} // function _storeData()
|
|
|
|
|
|
/**
|
|
* Add or Update a cell in cache identified by coordinate address
|
|
*
|
|
* @param string $pCoord Coordinate address of the cell to update
|
|
* @param PHPExcel_Cell $cell Cell to update
|
|
* @return void
|
|
* @throws Exception
|
|
*/
|
|
public function addCacheData($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;
|
|
} // function addCacheData()
|
|
|
|
|
|
/**
|
|
* Is a value set in the current PHPExcel_CachedObjectStorage_ICache for an indexed cell?
|
|
*
|
|
* @param string $pCoord Coordinate address of the cell to check
|
|
* @return void
|
|
* @return boolean
|
|
*/
|
|
public function isDataSet($pCoord) {
|
|
// Check if the requested entry is the current object, or exists in the cache
|
|
if (parent::isDataSet($pCoord)) {
|
|
if ($this->_currentObjectID == $pCoord) {
|
|
return true;
|
|
}
|
|
// Check if the requested entry still exists in Memcache
|
|
$success = $this->_memcache->get($this->_cachePrefix.$pCoord.'.cache');
|
|
if ($success === false) {
|
|
// Entry no longer exists in Memcache, so clear it from the cache array
|
|
parent::deleteCacheData($pCoord);
|
|
throw new Exception('Cell entry '.$pCoord.' no longer exists in MemCache');
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
} // function isDataSet()
|
|
|
|
|
|
/**
|
|
* Get cell at a specific coordinate
|
|
*
|
|
* @param string $pCoord Coordinate of the cell
|
|
* @throws Exception
|
|
* @return PHPExcel_Cell Cell that was found, or null if not found
|
|
*/
|
|
public function getCacheData($pCoord) {
|
|
if ($pCoord === $this->_currentObjectID) {
|
|
return $this->_currentObject;
|
|
}
|
|
$this->_storeData();
|
|
|
|
// Check if the entry that has been requested actually exists
|
|
if (parent::isDataSet($pCoord)) {
|
|
$obj = $this->_memcache->get($this->_cachePrefix.$pCoord.'.cache');
|
|
if ($obj === false) {
|
|
// Entry no longer exists in Memcache, so clear it from the cache array
|
|
parent::deleteCacheData($pCoord);
|
|
throw new Exception('Cell entry '.$pCoord.' no longer exists in MemCache');
|
|
}
|
|
} else {
|
|
// Return null if requested entry doesn't exist in cache
|
|
return null;
|
|
}
|
|
|
|
// Set current entry to the requested entry
|
|
$this->_currentObjectID = $pCoord;
|
|
$this->_currentObject = unserialize($obj);
|
|
// Re-attach the parent worksheet
|
|
$this->_currentObject->attach($this->_parent);
|
|
|
|
// Return requested entry
|
|
return $this->_currentObject;
|
|
} // function getCacheData()
|
|
|
|
|
|
/**
|
|
* Delete a cell in cache identified by coordinate address
|
|
*
|
|
* @param string $pCoord Coordinate address of the cell to delete
|
|
* @throws Exception
|
|
*/
|
|
public function deleteCacheData($pCoord) {
|
|
// Delete the entry from Memcache
|
|
$this->_memcache->delete($this->_cachePrefix.$pCoord.'.cache');
|
|
|
|
// Delete the entry from our cell address array
|
|
parent::deleteCacheData($pCoord);
|
|
} // function deleteCacheData()
|
|
|
|
|
|
/**
|
|
* Clone the cell collection
|
|
*
|
|
* @param PHPExcel_Worksheet $parent The new worksheet
|
|
* @return void
|
|
*/
|
|
public function copyCellCollection(PHPExcel_Worksheet $parent) {
|
|
parent::copyCellCollection($parent);
|
|
// Get a new id for the new file name
|
|
$baseUnique = $this->_getUniqueID();
|
|
$newCachePrefix = substr(md5($baseUnique),0,8).'.';
|
|
$cacheList = $this->getCellList();
|
|
foreach($cacheList as $cellID) {
|
|
if ($cellID != $this->_currentObjectID) {
|
|
$obj = $this->_memcache->get($this->_cachePrefix.$cellID.'.cache');
|
|
if ($obj === false) {
|
|
// Entry no longer exists in Memcache, so clear it from the cache array
|
|
parent::deleteCacheData($cellID);
|
|
throw new Exception('Cell entry '.$cellID.' no longer exists in MemCache');
|
|
}
|
|
if (!$this->_memcache->add($newCachePrefix.$cellID.'.cache',$obj,NULL,$this->_cacheTime)) {
|
|
$this->__destruct();
|
|
throw new Exception('Failed to store cell '.$cellID.' in MemCache');
|
|
}
|
|
}
|
|
}
|
|
$this->_cachePrefix = $newCachePrefix;
|
|
} // function copyCellCollection()
|
|
|
|
|
|
/**
|
|
* Clear the cell collection and disconnect from our parent
|
|
*
|
|
* @return void
|
|
*/
|
|
public function unsetWorksheetCells() {
|
|
if(!is_null($this->_currentObject)) {
|
|
$this->_currentObject->detach();
|
|
$this->_currentObject = $this->_currentObjectID = null;
|
|
}
|
|
|
|
// Flush the Memcache cache
|
|
$this->__destruct();
|
|
|
|
$this->_cellCache = array();
|
|
|
|
// detach ourself from the worksheet, so that it can then delete this object successfully
|
|
$this->_parent = null;
|
|
} // function unsetWorksheetCells()
|
|
|
|
|
|
/**
|
|
* Initialise this new cell collection
|
|
*
|
|
* @param PHPExcel_Worksheet $parent The worksheet for this cell collection
|
|
* @param array of mixed $arguments Additional initialisation arguments
|
|
*/
|
|
public function __construct(PHPExcel_Worksheet $parent, $arguments) {
|
|
$memcacheServer = (isset($arguments['memcacheServer'])) ? $arguments['memcacheServer'] : 'localhost';
|
|
$memcachePort = (isset($arguments['memcachePort'])) ? $arguments['memcachePort'] : 11211;
|
|
$cacheTime = (isset($arguments['cacheTime'])) ? $arguments['cacheTime'] : 600;
|
|
|
|
if (is_null($this->_cachePrefix)) {
|
|
$baseUnique = $this->_getUniqueID();
|
|
$this->_cachePrefix = substr(md5($baseUnique),0,8).'.';
|
|
|
|
// Set a new Memcache object and connect to the Memcache server
|
|
$this->_memcache = new Memcache();
|
|
if (!$this->_memcache->addServer($memcacheServer, $memcachePort, false, 50, 5, 5, true, array($this, 'failureCallback'))) {
|
|
throw new Exception('Could not connect to MemCache server at '.$memcacheServer.':'.$memcachePort);
|
|
}
|
|
$this->_cacheTime = $cacheTime;
|
|
|
|
parent::__construct($parent);
|
|
}
|
|
} // function __construct()
|
|
|
|
|
|
/**
|
|
* Memcache error handler
|
|
*
|
|
* @param string $host Memcache server
|
|
* @param integer $port Memcache port
|
|
* @throws Exception
|
|
*/
|
|
public function failureCallback($host, $port) {
|
|
throw new Exception('memcache '.$host.':'.$port.' failed');
|
|
}
|
|
|
|
|
|
/**
|
|
* Destroy this cell collection
|
|
*/
|
|
public function __destruct() {
|
|
$cacheList = $this->getCellList();
|
|
foreach($cacheList as $cellID) {
|
|
$this->_memcache->delete($this->_cachePrefix.$cellID.'.cache');
|
|
}
|
|
} // function __destruct()
|
|
|
|
/**
|
|
* Identify whether the caching method is currently available
|
|
* Some methods are dependent on the availability of certain extensions being enabled in the PHP build
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public static function cacheMethodIsAvailable() {
|
|
if (!function_exists('memcache_add')) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|