WordPress/wp-includes/SimplePie/Cache/Memcache.php
Andrew Nacin 405a995659 Update to SimplePie 1.3. props rmccue.
Uses individual files for each class. We now conditionally load only the pieces
we need, resulting in less memory usage. Also easier to maintain now that it is
not a single 387KB file.

fixes #21183.



git-svn-id: http://core.svn.wordpress.org/trunk@21644 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2012-08-28 17:24:33 +00:00

184 lines
5.0 KiB
PHP
Executable File

<?php
/**
* SimplePie
*
* A PHP-Based RSS and Atom Feed Framework.
* Takes the hard work out of managing a complete RSS/Atom solution.
*
* Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* * Neither the name of the SimplePie Team nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package SimplePie
* @version 1.3
* @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
* @author Ryan Parman
* @author Geoffrey Sneddon
* @author Ryan McCue
* @link http://simplepie.org/ SimplePie
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
/**
* Caches data to memcache
*
* Registered for URLs with the "memcache" protocol
*
* For example, `memcache://localhost:11211/?timeout=3600&prefix=sp_` will
* connect to memcache on `localhost` on port 11211. All tables will be
* prefixed with `sp_` and data will expire after 3600 seconds
*
* @package SimplePie
* @subpackage Caching
* @uses Memcache
*/
class SimplePie_Cache_Memcache implements SimplePie_Cache_Base
{
/**
* Memcache instance
*
* @var Memcache
*/
protected $cache;
/**
* Options
*
* @var array
*/
protected $options;
/**
* Cache name
*
* @var string
*/
protected $name;
/**
* Create a new cache object
*
* @param string $location Location string (from SimplePie::$cache_location)
* @param string $name Unique ID for the cache
* @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data
*/
public function __construct($location, $name, $type)
{
$this->options = array(
'host' => '127.0.0.1',
'port' => 11211,
'extras' => array(
'timeout' => 3600, // one hour
'prefix' => 'simplepie_',
),
);
$parsed = SimplePie_Cache::parse_URL($location);
$this->options['host'] = empty($parsed['host']) ? $this->options['host'] : $parsed['host'];
$this->options['port'] = empty($parsed['port']) ? $this->options['port'] : $parsed['port'];
$this->options['extras'] = array_merge($this->options['extras'], $parsed['extras']);
$this->name = $this->options['extras']['prefix'] . md5("$name:$type");
$this->cache = new Memcache();
$this->cache->addServer($this->options['host'], (int) $this->options['port']);
}
/**
* Save data to the cache
*
* @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property
* @return bool Successfulness
*/
public function save($data)
{
if ($data instanceof SimplePie)
{
$data = $data->data;
}
return $this->cache->set($this->name, serialize($data), MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']);
}
/**
* Retrieve the data saved to the cache
*
* @return array Data for SimplePie::$data
*/
public function load()
{
$data = $this->cache->get($this->name);
if ($data !== false)
{
return unserialize($data);
}
return false;
}
/**
* Retrieve the last modified time for the cache
*
* @return int Timestamp
*/
public function mtime()
{
$data = $this->cache->get($this->name);
if ($data !== false)
{
// essentially ignore the mtime because Memcache expires on it's own
return time();
}
return false;
}
/**
* Set the last modified time to the current time
*
* @return bool Success status
*/
public function touch()
{
$data = $this->cache->get($this->name);
if ($data !== false)
{
return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->duration);
}
return false;
}
/**
* Remove the cache
*
* @return bool Success status
*/
public function unlink()
{
return $this->cache->delete($this->name, 0);
}
}