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07c3cdd | 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 | <?php
/**
* class.memcached.php
*
* @package workflow.engine.ProcessMaker
*
* ProcessMaker Open Source Edition
* Copyright (C) 2004 - 2011 Colosa Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* For more information, contact Colosa Inc, 2566 Le Jeune Rd.,
* Coral Gables, FL, 33134, USA, or email info@colosa.com.
*
*/
class FileCache
{
function __construct ($dir)
{
$this->dir = $dir;
}
private function _name($key)
{
return sprintf("%s%s", $this->dir, sha1($key));
}
public function get ($key, $expiration = 3600)
{
if (! is_dir( $this->dir ) or ! is_writable( $this->dir )) {
return FALSE;
}
$cache_path = $this->_name( $key );
if (! @file_exists( $cache_path )) {
return FALSE;
}
if (filemtime( $cache_path ) < (time() - $expiration)) {
// $this->delete($key);
// different users can have different timeout requests
return FALSE;
}
if (! $fp = @fopen( $cache_path, 'rb' )) {
return FALSE;
}
flock( $fp, LOCK_SH );
$cache = '';
if (filesize( $cache_path ) > 0) {
$cache = unserialize( fread( $fp, filesize( $cache_path ) ) );
} else {
$cache = NULL;
}
flock( $fp, LOCK_UN );
fclose( $fp );
return $cache;
}
public function set ($key, $data)
{
if (! is_dir( $this->dir ) or ! is_writable( $this->dir )) {
return FALSE;
}
$cache_path = $this->_name( $key );
if (! $fp = fopen( $cache_path, 'wb' )) {
return FALSE;
}
if (flock( $fp, LOCK_EX )) {
fwrite( $fp, serialize( $data ) );
flock( $fp, LOCK_UN );
} else {
return FALSE;
}
fclose( $fp );
@chmod( $cache_path, 0777 );
return TRUE;
}
public function delete($key)
{
$cache_path = $this->_name($key);
if (file_exists($cache_path)) {
unlink($cache_path);
return true;
}
return false;
}
public function flush()
{
G::rm_dir($this->dir);
}
public function getStats()
{
return null;
}
}
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