inc/3rdparty/libraries/simplepie/library/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) 2004-2012, 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 1.3.1
  37  * @copyright 2004-2012 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  */
  44
  45 /**
  46  * Caches data to memcache
  47  *
  48  * Registered for URLs with the "memcache" protocol
  49  *
  50  * For example, `memcache://localhost:11211/?timeout=3600&prefix=sp_` will
  51  * connect to memcache on `localhost` on port 11211. All tables will be
  52  * prefixed with `sp_` and data will expire after 3600 seconds
  53  *
  54  * @package SimplePie
  55  * @subpackage Caching
  56  * @uses Memcache
  57  */
  58 class SimplePie_Cache_Memcache implements SimplePie_Cache_Base
  59 {
  60         /**
  61          * Memcache instance
  62          *
  63          * @var Memcache
  64          */
  65         protected $cache;
  66
  67         /**
  68          * Options
  69          *
  70          * @var array
  71          */
  72         protected $options;
  73
  74         /**
  75          * Cache name
  76          *
  77          * @var string
  78          */
  79         protected $name;
  80
  81         /**
  82          * Create a new cache object
  83          *
  84          * @param string $location Location string (from SimplePie::$cache_location)
  85          * @param string $name Unique ID for the cache
  86          * @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data
  87          */
  88         public function __construct($location, $name, $type)
  89         {
  90                 $this->options = array(
  91                         'host' => '127.0.0.1',
  92                         'port' => 11211,
  93                         'extras' => array(
  94                                 'timeout' => 3600, // one hour
  95                                 'prefix' => 'simplepie_',
  96                         ),
  97                 );
  98                 $parsed = SimplePie_Cache::parse_URL($location);
  99                 $this->options['host'] = empty($parsed['host']) ? $this->options['host'] : $parsed['host'];
 100                 $this->options['port'] = empty($parsed['port']) ? $this->options['port'] : $parsed['port'];
 101                 $this->options['extras'] = array_merge($this->options['extras'], $parsed['extras']);
 102                 $this->name = $this->options['extras']['prefix'] . md5("$name:$type");
 103
 104                 $this->cache = new Memcache();
 105                 $this->cache->addServer($this->options['host'], (int) $this->options['port']);
 106         }
 107
 108         /**
 109          * Save data to the cache
 110          *
 111          * @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property
 112          * @return bool Successfulness
 113          */
 114         public function save($data)
 115         {
 116                 if ($data instanceof SimplePie)
 117                 {
 118                         $data = $data->data;
 119                 }
 120                 return $this->cache->set($this->name, serialize($data), MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);
 121         }
 122
 123         /**
 124          * Retrieve the data saved to the cache
 125          *
 126          * @return array Data for SimplePie::$data
 127          */
 128         public function load()
 129         {
 130                 $data = $this->cache->get($this->name);
 131
 132                 if ($data !== false)
 133                 {
 134                         return unserialize($data);
 135                 }
 136                 return false;
 137         }
 138
 139         /**
 140          * Retrieve the last modified time for the cache
 141          *
 142          * @return int Timestamp
 143          */
 144         public function mtime()
 145         {
 146                 $data = $this->cache->get($this->name);
 147
 148                 if ($data !== false)
 149                 {
 150                         // essentially ignore the mtime because Memcache expires on it's own
 151                         return time();
 152                 }
 153
 154                 return false;
 155         }
 156
 157         /**
 158          * Set the last modified time to the current time
 159          *
 160          * @return bool Success status
 161          */
 162         public function touch()
 163         {
 164                 $data = $this->cache->get($this->name);
 165
 166                 if ($data !== false)
 167                 {
 168                         return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->duration);
 169                 }
 170
 171                 return false;
 172         }
 173
 174         /**
 175          * Remove the cache
 176          *
 177          * @return bool Success status
 178          */
 179         public function unlink()
 180         {
 181                 return $this->cache->delete($this->name, 0);
 182         }
 183 }