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<?php
/**
* @package Joomla.Platform
* @subpackage Cache
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
defined('JPATH_PLATFORM') or die;
/**
* Joomla Cache output type object
*
* @since 11.1
*/
class JCacheControllerOutput extends JCacheController
{
/**
* Cache data ID
*
* @var string
* @since 11.1
*/
protected $_id;
/**
* Cache data group
*
* @var string
* @since 11.1
*/
protected $_group;
/**
* Object to test locked state
*
* @var object
* @since 11.1
*/
protected $_locktest = null;
/**
* Start the cache
*
* @param string $id The cache data id
* @param string $group The cache data group
*
* @return boolean True if the cache is hit (false else)
*
* @since 11.1
*/
public function start($id, $group = null)
{
// If we have data in cache use that.
$data = $this->cache->get($id, $group);
$this->_locktest = new stdClass;
$this->_locktest->locked = null;
$this->_locktest->locklooped = null;
if ($data === false)
{
$this->_locktest = $this->cache->lock($id, $group);
if ($this->_locktest->locked == true && $this->_locktest->locklooped == true)
{
$data = $this->cache->get($id, $group);
}
}
if ($data !== false)
{
$data = unserialize(trim($data));
echo $data;
if ($this->_locktest->locked == true)
{
$this->cache->unlock($id, $group);
}
return true;
}
// Nothing in cache... let's start the output buffer and start collecting data for next time.
if ($this->_locktest->locked == false)
{
$this->_locktest = $this->cache->lock($id, $group);
}
ob_start();
ob_implicit_flush(false);
// Set id and group placeholders
$this->_id = $id;
$this->_group = $group;
return false;
}
/**
* Stop the cache buffer and store the cached data
*
* @return boolean True if cache stored
*
* @since 11.1
*/
public function end()
{
// Get data from output buffer and echo it
$data = ob_get_contents();
ob_end_clean();
echo $data;
// Get id and group and reset them placeholders
$id = $this->_id;
$group = $this->_group;
$this->_id = null;
$this->_group = null;
// Get the storage handler and store the cached data
$ret = $this->cache->store(serialize($data), $id, $group);
if ($this->_locktest->locked == true)
{
$this->cache->unlock($id, $group);
}
return $ret;
}
}