126 lines
2.9 KiB
PHP
126 lines
2.9 KiB
PHP
<?php
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/**
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* class.memcached.php
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*
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* @package workflow.engine.ProcessMaker
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*
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* ProcessMaker Open Source Edition
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* Copyright (C) 2004 - 2011 Colosa Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* For more information, contact Colosa Inc, 2566 Le Jeune Rd.,
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* Coral Gables, FL, 33134, USA, or email info@colosa.com.
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*
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*/
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class FileCache
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{
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function __construct ($dir)
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{
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$this->dir = $dir;
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}
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private function _name($key)
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{
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return sprintf("%s%s", $this->dir, sha1($key));
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}
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public function get ($key, $expiration = 3600)
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{
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if (! is_dir( $this->dir ) or ! is_writable( $this->dir )) {
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return FALSE;
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}
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$cache_path = $this->_name( $key );
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if (! @file_exists( $cache_path )) {
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return FALSE;
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}
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if (filemtime( $cache_path ) < (time() - $expiration)) {
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// $this->delete($key);
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// different users can have different timeout requests
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return FALSE;
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}
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if (! $fp = @fopen( $cache_path, 'rb' )) {
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return FALSE;
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}
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flock( $fp, LOCK_SH );
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$cache = '';
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if (filesize( $cache_path ) > 0) {
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$cache = unserialize( fread( $fp, filesize( $cache_path ) ) );
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} else {
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$cache = NULL;
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}
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flock( $fp, LOCK_UN );
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fclose( $fp );
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return $cache;
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}
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public function set ($key, $data)
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{
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if (! is_dir( $this->dir ) or ! is_writable( $this->dir )) {
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return FALSE;
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}
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$cache_path = $this->_name( $key );
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if (! $fp = fopen( $cache_path, 'wb' )) {
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return FALSE;
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}
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if (flock( $fp, LOCK_EX )) {
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fwrite( $fp, serialize( $data ) );
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flock( $fp, LOCK_UN );
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} else {
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return FALSE;
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}
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fclose( $fp );
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@chmod( $cache_path, 0777 );
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return TRUE;
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}
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public function delete($key)
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{
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$cache_path = $this->_name($key);
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if (file_exists($cache_path)) {
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unlink($cache_path);
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return true;
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}
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return false;
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}
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public function flush()
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{
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G::rm_dir($this->dir);
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}
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public function getStats()
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{
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return null;
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}
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}
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