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<?php
/**
* TSqlMapCache class file contains FIFO, LRU, and GLOBAL cache implementations.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Data\SqlMap\DataMapper
*/
namespace Prado\Data\SqlMap\DataMapper;
use Prado\Caching\ICache;
use Prado\Collections\TList;
use Prado\Data\SqlMap\Configuration\TSqlMapCacheModel;
use Prado\Prado;
/**
* TSqlMapApplicationCache uses the default Prado application cache for
* caching SqlMap results.
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @package Prado\Data\SqlMap\DataMapper
* @since 3.1
*/
class TSqlMapApplicationCache implements ICache
{
protected $_cacheModel=null;
/**
* Create a new cache with limited cache size.
* @param TSqlMapCacheModel $cacheModel.
*/
public function __construct($cacheModel=null)
{
$this->_cacheModel=$cacheModel;
}
/**
*
* @return string a KeyListID for the cache model.
*/
protected function getKeyListId()
{
$id='keyList';
if ($this->_cacheModel instanceof TSqlMapCacheModel)
$id.='_'.$this->_cacheModel->getId();
return $id;
}
/**
* Retreive keylist from cache or create it if it doesn't exists
* @return TList
*/
protected function getKeyList()
{
if (($keyList=$this->getCache()->get($this->getKeyListId()))===false)
{
$keyList=new TList();
$this->getCache()->set($this->getKeyListId(), $keyList);
}
return $keyList;
}
protected function setKeyList($keyList)
{
$this->getCache()->set($this->getKeyListId(), $keyList);
}
/**
* @param string item to be deleted.
*/
public function delete($key)
{
$keyList=$this->getKeyList();
$keyList->remove($key);
$this->getCache()->delete($key);
$this->setKeyList($keyList);
}
/**
* Deletes all items in the cache, only for data cached by sqlmap cachemodel
*/
public function flush()
{
$keyList=$this->getKeyList();
$cache=$this->getCache();
foreach ($keyList as $key)
{
$cache->delete($key);
}
// Remove the old keylist
$cache->delete($this->getKeyListId());
}
/**
* @return mixed Gets a cached object with the specified key.
*/
public function get($key)
{
$result = $this->getCache()->get($key);
if ($result === false)
{
// if the key has not been found in cache (e.g expired), remove from keylist
$keyList=$this->getKeyList();
if ($keyList->contains($key))
{
$keyList->remove($key);
$this->setKeyList($keyList);
}
}
return $result === false ? null : $result;
}
/**
* Stores a value identified by a key into cache.
* @param string the key identifying the value to be cached
* @param mixed the value to be cached
*/
public function set($key, $value,$expire=0,$dependency=null)
{
$this->getCache()->set($key, $value, $expire,$dependency);
$keyList=$this->getKeyList();
if (!$keyList->contains($key))
{
$keyList->add($key);
$this->setKeyList($keyList);
}
}
/**
* @return ICache Application cache instance.
*/
protected function getCache()
{
return Prado::getApplication()->getCache();
}
/**
* @throws TSqlMapException not implemented.
*/
public function add($id,$value,$expire=0,$dependency=null)
{
throw new TSqlMapException('sqlmap_use_set_to_store_cache');
}
}
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