1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
|
<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2014 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 - 2014 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 - 2014 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 $_memcache = null;
/**
* Store cell data in cache for the current cell object if it's "dirty",
* and the 'nullify' the current cell object
*
* @return void
* @throws PHPExcel_Exception
*/
protected function _storeData() {
if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) {
$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)) {
$this->__destruct();
throw new PHPExcel_Exception('Failed to store cell '.$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 $cell Cell to update
* @return PHPExcel_Cell
* @throws PHPExcel_Exception
*/
public function addCacheData($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 $pCoord Coordinate address of the cell to check
* @return boolean
* @return boolean
*/
public function isDataSet($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($pCoord);
throw new PHPExcel_Exception('Cell entry '.$pCoord.' no longer exists in MemCache');
}
return true;
}
return false;
} // function isDataSet()
/**
* Get cell at a specific coordinate
*
* @param string $pCoord Coordinate of the cell
* @throws PHPExcel_Exception
* @return PHPExcel_Cell Cell that was found, or null if not found
*/
public function getCacheData($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($pCoord);
throw new PHPExcel_Exception('Cell entry '.$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 this as the cell's parent
$this->_currentObject->attach($this);
// Return requested entry
return $this->_currentObject;
} // function getCacheData()
/**
* Get a list of all cell addresses currently held in cache
*
* @return string[]
*/
public function getCellList() {
if ($this->_currentObjectID !== null) {
$this->_storeData();
}
return parent::getCellList();
}
/**
* Delete a cell in cache identified by coordinate address
*
* @param string $pCoord Coordinate address of the cell to delete
* @throws PHPExcel_Exception
*/
public function deleteCacheData($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($cellID);
throw new PHPExcel_Exception('Cell entry '.$cellID.' no longer exists in MemCache');
}
if (!$this->_memcache->add($newCachePrefix.$cellID.'.cache',$obj,NULL,$this->_cacheTime)) {
$this->__destruct();
throw new PHPExcel_Exception('Failed to store cell '.$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 PHPExcel_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 $port Memcache port
* @throws PHPExcel_Exception
*/
public function failureCallback($host, $port) {
throw new PHPExcel_Exception('memcache '.$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;
}
}
|