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<?php
/**
* Container for all XCache-based cache methods. Inherits additional methods from <CacheCore>. Adheres
* to the ICacheCore interface.
*
* @version 2012.04.17
* @copyright 2006-2012 Ryan Parman
* @copyright 2006-2010 Foleeo, Inc.
* @copyright 2012 Amazon.com, Inc. or its affiliates.
* @copyright 2008-2010 Contributors
* @license http://opensource.org/licenses/bsd-license.php Simplified BSD License
* @link http://github.com/skyzyx/cachecore CacheCore
* @link http://getcloudfusion.com CloudFusion
* @link http://xcache.lighttpd.net XCache
*/
class CacheXCache extends CacheCore implements ICacheCore
{
/*%******************************************************************************************%*/
// CONSTRUCTOR
/**
* Constructs a new instance of this class.
*
* @param string $name (Required) A name to uniquely identify the cache object.
* @param string $location (Optional) The location to store the cache object in. This may vary by cache method. The default value is NULL.
* @param integer $expires (Optional) The number of seconds until a cache object is considered stale. The default value is 0.
* @param boolean $gzip (Optional) Whether data should be gzipped before being stored. The default value is true.
* @return object Reference to the cache object.
*/
public function __construct($name, $location = null, $expires = 0, $gzip = true)
{
parent::__construct($name, null, $expires, $gzip);
$this->id = $this->name;
}
/**
* Creates a new cache.
*
* @param mixed $data (Required) The data to cache.
* @return boolean Whether the operation was successful.
*/
public function create($data)
{
$data = serialize($data);
$data = $this->gzip ? gzcompress($data) : $data;
return xcache_set($this->id, $data, $this->expires);
}
/**
* Reads a cache.
*
* @return mixed Either the content of the cache object, or boolean `false`.
*/
public function read()
{
if ($data = xcache_get($this->id))
{
$data = $this->gzip ? gzuncompress($data) : $data;
return unserialize($data);
}
return false;
}
/**
* Updates an existing cache.
*
* @param mixed $data (Required) The data to cache.
* @return boolean Whether the operation was successful.
*/
public function update($data)
{
$data = serialize($data);
$data = $this->gzip ? gzcompress($data) : $data;
return xcache_set($this->id, $data, $this->expires);
}
/**
* Deletes a cache.
*
* @return boolean Whether the operation was successful.
*/
public function delete()
{
return xcache_unset($this->id);
}
/**
* Defined here, but always returns false. XCache manages it's own expirations. It's worth
* mentioning that if the server is configured for a long xcache.var_gc_interval then it IS
* possible for expired data to remain in the var cache, though it is not possible to access
* it.
*
* @return boolean Whether the cache is expired or not.
*/
public function is_expired()
{
return false;
}
/**
* Implemented here, but always returns `false`. XCache manages its own expirations.
*
* @return mixed Either the Unix time stamp of the cache creation, or boolean `false`.
*/
public function timestamp()
{
return false;
}
/**
* Implemented here, but always returns `false`. XCache manages its own expirations.
*
* @return boolean Whether the operation was successful.
*/
public function reset()
{
return false;
}
}
/*%******************************************************************************************%*/
// EXCEPTIONS
class CacheXCache_Exception extends CacheCore_Exception {}
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