[289] | 1 | <?php
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| 2 | /**
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| 3 | * PHPExcel
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| 4 | *
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| 5 | * Copyright (c) 2006 - 2014 PHPExcel
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| 6 | *
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| 7 | * This library is free software; you can redistribute it and/or
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| 8 | * modify it under the terms of the GNU Lesser General Public
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| 9 | * License as published by the Free Software Foundation; either
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| 10 | * version 2.1 of the License, or (at your option) any later version.
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| 11 | *
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| 12 | * This library is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | * Lesser General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU Lesser General Public
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| 18 | * License along with this library; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 20 | *
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| 21 | * @category PHPExcel
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| 22 | * @package PHPExcel_CachedObjectStorage
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| 23 | * @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
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| 24 | * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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| 25 | * @version 1.8.0, 2014-03-02
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| 26 | */
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| 27 |
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| 28 |
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| 29 | /**
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| 30 | * PHPExcel_CachedObjectStorage_Memcache
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| 31 | *
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| 32 | * @category PHPExcel
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| 33 | * @package PHPExcel_CachedObjectStorage
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| 34 | * @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
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| 35 | */
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| 36 | class PHPExcel_CachedObjectStorage_Memcache extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
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| 37 |
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| 38 | /**
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| 39 | * Prefix used to uniquely identify cache data for this worksheet
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| 40 | *
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| 41 | * @var string
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| 42 | */
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| 43 | private $_cachePrefix = null;
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| 44 |
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| 45 | /**
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| 46 | * Cache timeout
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| 47 | *
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| 48 | * @var integer
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| 49 | */
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| 50 | private $_cacheTime = 600;
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| 51 |
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| 52 | /**
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| 53 | * Memcache interface
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| 54 | *
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| 55 | * @var resource
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| 56 | */
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| 57 | private $_memcache = null;
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| 58 |
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| 59 |
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| 60 | /**
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| 61 | * Store cell data in cache for the current cell object if it's "dirty",
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| 62 | * and the 'nullify' the current cell object
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| 63 | *
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| 64 | * @return void
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| 65 | * @throws PHPExcel_Exception
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| 66 | */
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| 67 | protected function _storeData() {
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| 68 | if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) {
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| 69 | $this->_currentObject->detach();
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| 70 |
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| 71 | $obj = serialize($this->_currentObject);
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| 72 | if (!$this->_memcache->replace($this->_cachePrefix.$this->_currentObjectID.'.cache',$obj,NULL,$this->_cacheTime)) {
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| 73 | if (!$this->_memcache->add($this->_cachePrefix.$this->_currentObjectID.'.cache',$obj,NULL,$this->_cacheTime)) {
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| 74 | $this->__destruct();
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| 75 | throw new PHPExcel_Exception('Failed to store cell '.$this->_currentObjectID.' in MemCache');
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| 76 | }
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| 77 | }
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| 78 | $this->_currentCellIsDirty = false;
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| 79 | }
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| 80 | $this->_currentObjectID = $this->_currentObject = null;
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| 81 | } // function _storeData()
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| 82 |
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| 83 |
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| 84 | /**
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| 85 | * Add or Update a cell in cache identified by coordinate address
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| 86 | *
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| 87 | * @param string $pCoord Coordinate address of the cell to update
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| 88 | * @param PHPExcel_Cell $cell Cell to update
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| 89 | * @return void
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| 90 | * @throws PHPExcel_Exception
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| 91 | */
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| 92 | public function addCacheData($pCoord, PHPExcel_Cell $cell) {
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| 93 | if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
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| 94 | $this->_storeData();
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| 95 | }
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| 96 | $this->_cellCache[$pCoord] = true;
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| 97 |
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| 98 | $this->_currentObjectID = $pCoord;
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| 99 | $this->_currentObject = $cell;
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| 100 | $this->_currentCellIsDirty = true;
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| 101 |
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| 102 | return $cell;
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| 103 | } // function addCacheData()
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| 104 |
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| 105 |
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| 106 | /**
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| 107 | * Is a value set in the current PHPExcel_CachedObjectStorage_ICache for an indexed cell?
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| 108 | *
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| 109 | * @param string $pCoord Coordinate address of the cell to check
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| 110 | * @return void
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| 111 | * @return boolean
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| 112 | */
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| 113 | public function isDataSet($pCoord) {
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| 114 | // Check if the requested entry is the current object, or exists in the cache
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| 115 | if (parent::isDataSet($pCoord)) {
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| 116 | if ($this->_currentObjectID == $pCoord) {
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| 117 | return true;
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| 118 | }
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| 119 | // Check if the requested entry still exists in Memcache
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| 120 | $success = $this->_memcache->get($this->_cachePrefix.$pCoord.'.cache');
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| 121 | if ($success === false) {
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| 122 | // Entry no longer exists in Memcache, so clear it from the cache array
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| 123 | parent::deleteCacheData($pCoord);
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| 124 | throw new PHPExcel_Exception('Cell entry '.$pCoord.' no longer exists in MemCache');
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| 125 | }
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| 126 | return true;
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| 127 | }
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| 128 | return false;
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| 129 | } // function isDataSet()
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| 130 |
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| 131 |
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| 132 | /**
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| 133 | * Get cell at a specific coordinate
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| 134 | *
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| 135 | * @param string $pCoord Coordinate of the cell
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| 136 | * @throws PHPExcel_Exception
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| 137 | * @return PHPExcel_Cell Cell that was found, or null if not found
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| 138 | */
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| 139 | public function getCacheData($pCoord) {
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| 140 | if ($pCoord === $this->_currentObjectID) {
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| 141 | return $this->_currentObject;
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| 142 | }
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| 143 | $this->_storeData();
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| 144 |
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| 145 | // Check if the entry that has been requested actually exists
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| 146 | if (parent::isDataSet($pCoord)) {
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| 147 | $obj = $this->_memcache->get($this->_cachePrefix.$pCoord.'.cache');
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| 148 | if ($obj === false) {
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| 149 | // Entry no longer exists in Memcache, so clear it from the cache array
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| 150 | parent::deleteCacheData($pCoord);
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| 151 | throw new PHPExcel_Exception('Cell entry '.$pCoord.' no longer exists in MemCache');
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| 152 | }
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| 153 | } else {
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| 154 | // Return null if requested entry doesn't exist in cache
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| 155 | return null;
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| 156 | }
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| 157 |
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| 158 | // Set current entry to the requested entry
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| 159 | $this->_currentObjectID = $pCoord;
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| 160 | $this->_currentObject = unserialize($obj);
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| 161 | // Re-attach this as the cell's parent
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| 162 | $this->_currentObject->attach($this);
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| 163 |
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| 164 | // Return requested entry
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| 165 | return $this->_currentObject;
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| 166 | } // function getCacheData()
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| 167 |
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| 168 |
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| 169 | /**
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| 170 | * Get a list of all cell addresses currently held in cache
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| 171 | *
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| 172 | * @return array of string
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| 173 | */
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| 174 | public function getCellList() {
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| 175 | if ($this->_currentObjectID !== null) {
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| 176 | $this->_storeData();
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| 177 | }
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| 178 |
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| 179 | return parent::getCellList();
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| 180 | }
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| 181 |
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| 182 |
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| 183 | /**
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| 184 | * Delete a cell in cache identified by coordinate address
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| 185 | *
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| 186 | * @param string $pCoord Coordinate address of the cell to delete
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| 187 | * @throws PHPExcel_Exception
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| 188 | */
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| 189 | public function deleteCacheData($pCoord) {
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| 190 | // Delete the entry from Memcache
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| 191 | $this->_memcache->delete($this->_cachePrefix.$pCoord.'.cache');
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| 192 |
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| 193 | // Delete the entry from our cell address array
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| 194 | parent::deleteCacheData($pCoord);
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| 195 | } // function deleteCacheData()
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| 196 |
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| 197 |
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| 198 | /**
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| 199 | * Clone the cell collection
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| 200 | *
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| 201 | * @param PHPExcel_Worksheet $parent The new worksheet
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| 202 | * @return void
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| 203 | */
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| 204 | public function copyCellCollection(PHPExcel_Worksheet $parent) {
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| 205 | parent::copyCellCollection($parent);
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| 206 | // Get a new id for the new file name
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| 207 | $baseUnique = $this->_getUniqueID();
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| 208 | $newCachePrefix = substr(md5($baseUnique),0,8).'.';
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| 209 | $cacheList = $this->getCellList();
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| 210 | foreach($cacheList as $cellID) {
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| 211 | if ($cellID != $this->_currentObjectID) {
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| 212 | $obj = $this->_memcache->get($this->_cachePrefix.$cellID.'.cache');
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| 213 | if ($obj === false) {
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| 214 | // Entry no longer exists in Memcache, so clear it from the cache array
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| 215 | parent::deleteCacheData($cellID);
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| 216 | throw new PHPExcel_Exception('Cell entry '.$cellID.' no longer exists in MemCache');
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| 217 | }
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| 218 | if (!$this->_memcache->add($newCachePrefix.$cellID.'.cache',$obj,NULL,$this->_cacheTime)) {
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| 219 | $this->__destruct();
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| 220 | throw new PHPExcel_Exception('Failed to store cell '.$cellID.' in MemCache');
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| 221 | }
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| 222 | }
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| 223 | }
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| 224 | $this->_cachePrefix = $newCachePrefix;
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| 225 | } // function copyCellCollection()
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| 226 |
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| 227 |
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| 228 | /**
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| 229 | * Clear the cell collection and disconnect from our parent
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| 230 | *
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| 231 | * @return void
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| 232 | */
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| 233 | public function unsetWorksheetCells() {
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| 234 | if(!is_null($this->_currentObject)) {
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| 235 | $this->_currentObject->detach();
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| 236 | $this->_currentObject = $this->_currentObjectID = null;
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| 237 | }
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| 238 |
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| 239 | // Flush the Memcache cache
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| 240 | $this->__destruct();
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| 241 |
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| 242 | $this->_cellCache = array();
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| 243 |
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| 244 | // detach ourself from the worksheet, so that it can then delete this object successfully
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| 245 | $this->_parent = null;
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| 246 | } // function unsetWorksheetCells()
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| 247 |
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| 248 |
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| 249 | /**
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| 250 | * Initialise this new cell collection
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| 251 | *
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| 252 | * @param PHPExcel_Worksheet $parent The worksheet for this cell collection
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| 253 | * @param array of mixed $arguments Additional initialisation arguments
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| 254 | */
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| 255 | public function __construct(PHPExcel_Worksheet $parent, $arguments) {
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| 256 | $memcacheServer = (isset($arguments['memcacheServer'])) ? $arguments['memcacheServer'] : 'localhost';
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| 257 | $memcachePort = (isset($arguments['memcachePort'])) ? $arguments['memcachePort'] : 11211;
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| 258 | $cacheTime = (isset($arguments['cacheTime'])) ? $arguments['cacheTime'] : 600;
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| 259 |
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| 260 | if (is_null($this->_cachePrefix)) {
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| 261 | $baseUnique = $this->_getUniqueID();
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| 262 | $this->_cachePrefix = substr(md5($baseUnique),0,8).'.';
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| 263 |
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| 264 | // Set a new Memcache object and connect to the Memcache server
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| 265 | $this->_memcache = new Memcache();
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| 266 | if (!$this->_memcache->addServer($memcacheServer, $memcachePort, false, 50, 5, 5, true, array($this, 'failureCallback'))) {
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| 267 | throw new PHPExcel_Exception('Could not connect to MemCache server at '.$memcacheServer.':'.$memcachePort);
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| 268 | }
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| 269 | $this->_cacheTime = $cacheTime;
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| 270 |
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| 271 | parent::__construct($parent);
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| 272 | }
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| 273 | } // function __construct()
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| 274 |
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| 275 |
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| 276 | /**
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| 277 | * Memcache error handler
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| 278 | *
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| 279 | * @param string $host Memcache server
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| 280 | * @param integer $port Memcache port
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| 281 | * @throws PHPExcel_Exception
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| 282 | */
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| 283 | public function failureCallback($host, $port) {
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| 284 | throw new PHPExcel_Exception('memcache '.$host.':'.$port.' failed');
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| 285 | }
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| 286 |
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| 287 |
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| 288 | /**
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| 289 | * Destroy this cell collection
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| 290 | */
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| 291 | public function __destruct() {
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| 292 | $cacheList = $this->getCellList();
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| 293 | foreach($cacheList as $cellID) {
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| 294 | $this->_memcache->delete($this->_cachePrefix.$cellID.'.cache');
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| 295 | }
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| 296 | } // function __destruct()
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| 297 |
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| 298 | /**
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| 299 | * Identify whether the caching method is currently available
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| 300 | * Some methods are dependent on the availability of certain extensions being enabled in the PHP build
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| 301 | *
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| 302 | * @return boolean
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| 303 | */
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| 304 | public static function cacheMethodIsAvailable() {
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| 305 | if (!function_exists('memcache_add')) {
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| 306 | return false;
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| 307 | }
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| 308 |
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| 309 | return true;
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| 310 | }
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| 311 |
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| 312 | }
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