inc/3rdparty/simplepie/SimplePie/Cache/Memcache.php

   1 <?php
   2 /**
   3  * SimplePie
   4  *
   5  * A PHP-Based RSS and Atom Feed Framework.
   6  * Takes the hard work out of managing a complete RSS/Atom solution.
   7  *
   8  * Copyright (c) 2004-2009, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without modification, are
  12  * permitted provided that the following conditions are met:
  13  *
  14  *      * Redistributions of source code must retain the above copyright notice, this list of
  15  *        conditions and the following disclaimer.
  16  *
  17  *      * Redistributions in binary form must reproduce the above copyright notice, this list
  18  *        of conditions and the following disclaimer in the documentation and/or other materials
  19  *        provided with the distribution.
  20  *
  21  *      * Neither the name of the SimplePie Team nor the names of its contributors may be used
  22  *        to endorse or promote products derived from this software without specific prior
  23  *        written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  26  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  27  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  28  * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  32  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  * @package SimplePie
  36  * @version 1.3-dev
  37  * @copyright 2004-2010 Ryan Parman, Geoffrey Sneddon, Ryan McCue
  38  * @author Ryan Parman
  39  * @author Geoffrey Sneddon
  40  * @author Ryan McCue
  41  * @link http://simplepie.org/ SimplePie
  42  * @license http://www.opensource.org/licenses/bsd-license.php BSD License
  43  * @todo phpDoc comments
  44  */
  45
  46 class SimplePie_Cache_Memcache implements SimplePie_Cache_Base
  47 {
  48         protected $cache;
  49         protected $options;
  50         protected $name;
  51
  52         public function __construct($url, $filename, $extension)
  53         {
  54                 $this->options = array(
  55                         'host' => '127.0.0.1',
  56                         'port' => 11211,
  57                         'extras' => array(
  58                                 'timeout' => 3600, // one hour
  59                                 'prefix' => 'simplepie_',
  60                         ),
  61                 );
  62                 $this->options = array_merge_recursive($this->options, SimplePie_Cache::parse_URL($url));
  63                 $this->name = $this->options['extras']['prefix'] . md5("$filename:$extension");
  64
  65                 $this->cache = new Memcache();
  66                 $this->cache->addServer($this->options['host'], (int) $this->options['port']);
  67         }
  68
  69         public function save($data)
  70         {
  71                 if (is_a($data, 'SimplePie'))
  72                 {
  73                         $data = $data->data;
  74                 }
  75                 return $this->cache->set($this->name, serialize($data), MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);
  76         }
  77
  78         public function load()
  79         {
  80                 $data = $this->cache->get($this->name);
  81
  82                 if ($data !== false)
  83                 {
  84                         return unserialize($data);
  85                 }
  86                 return false;
  87         }
  88
  89         public function mtime()
  90         {
  91                 $data = $this->cache->get($this->name);
  92
  93                 if ($data !== false)
  94                 {
  95                         // essentially ignore the mtime because Memcache expires on it's own
  96                         return time();
  97                 }
  98
  99                 return false;
 100         }
 101
 102         public function touch()
 103         {
 104                 $data = $this->cache->get($this->name);
 105
 106                 if ($data !== false)
 107                 {
 108                         return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->duration);
 109                 }
 110
 111                 return false;
 112         }
 113
 114         public function unlink()
 115         {
 116                 return $this->cache->delete($this->name);
 117         }
 118 }