public function read($url)
{
$id = $this->generateCacheId($url);
$content = $this->cacheDriver->fetch($id);
if ($content === false) {
$content = $this->urlReader->read($url);
$this->cacheDriver->save($id, $content, $this->cacheTime);
}
return $content;
}
/**
* Listens the preExecute event of Doctrine_Connection_Statement
*
* adds the issued query to internal query stack
* and checks if cached element exists
*
* @return boolean
*/
public function preExecute(Doctrine_Event $event)
{
$query = $event->getQuery();
$data = false;
// only process SELECT statements
if (strtoupper(substr(ltrim($query), 0, 6)) != 'SELECT') {
return false;
}
$this->add($query, $event->getInvoker()->getDbh()->getName());
$data = $this->_driver->fetch(md5(serialize(array($query, $event->getParams()))));
$this->success = $data ? true : false;
if (!$data) {
$rand = mt_rand() / mt_getrandmax();
if ($rand <= $this->_options['savePropability']) {
$stmt = $event->getInvoker()->getStatement();
$stmt->execute($event->getParams());
$data = $stmt->fetchAll(Doctrine::FETCH_ASSOC);
$this->success = true;
$this->_driver->save(md5(serialize(array($query, $event->getParams()))), $data);
}
}
if ($this->success) {
$this->_data = $data;
return true;
}
return false;
}