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<?php
class TSqlMapCacheModel extends TComponent
{
private $_cache;
// private $_flushInterval = -1;
private $_hits = 0;
private $_requests = 0;
private $_id;
// private $_lastFlush;
private $_implementation;
private $_properties = array();
public function getID(){ return $this->_id; }
public function setID($value){ $this->_id = $value; }
public function getImplementation(){ return $this->_implementation; }
public function setImplementation($value){ $this->_implementation = $value; }
// public function getFlushInterval(){ return $this->_flushInterval; }
// public function setFlushInterval($value){ $this->_flushInterval = $value; }
public function initialize($sqlMap)
{
$implementation = $this->getImplementationClass(
$sqlMap->getTypeHandlerFactory());
$this->_cache = new $implementation;
$this->_cache->configure($this, $this->_properties);
}
protected function getImplementationClass($typeFactory)
{
switch(strtolower($this->_implementation))
{
case 'fifo': return 'TSqlMapFifoCache';
case 'lru' : return 'TSqlMapLruCache';
case 'basic' : return 'TSqlMapApplicationCache';
}
if(class_exists($this->_implementation, false))
$class = $this->_implementation;
else
$class = $typeFactory->getTypeHandler($this->_implementation);
if(!is_null($class))
return $class;
else
throw new TSqlMapConfigurationException(
'sqlmap_unable_to_find_implemenation', $this->_implementation);
}
public function addProperty($name, $value)
{
$this->_properties[strtolower($name)] = $value;
}
public function registerTriggerStatement($mappedStatement)
{
$mappedStatement->attachEventHandler('OnExecuteQuery',
array($this, 'flushHandler'));
}
protected function flushHandler($sender, $param)
{
$this->flush();
}
public function flush()
{
$this->_cache->flush();
}
public function get($key)
{
if($key instanceof TSqlMapCacheKey)
$key = $key->getHash();
//if flush ?
$value = $this->_cache->get($key);
$this->_requests++;
if(!is_null($value))
$this->_hits++;
return $value;
}
public function set($key, $value)
{
if($key instanceof TSqlMapCacheKey)
$key = $key->getHash();
if(!is_null($value))
$this->_cache->set($key, $value);
}
public function getHitRatio()
{
if($this->_requests != 0)
return $this->_hits / $this->_requests;
else
return 0;
}
}
class TSqlMapCacheKey
{
private $_key;
public function __construct($object)
{
$this->_key = $this->generateKey(serialize($object));
}
protected function generateKey($string)
{
return sprintf('%x',crc32($string));
}
public function getHash()
{
return $this->_key;
}
public function __toString()
{
return $this->getHash();
}
}
?>
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