/**
* Sets the current cache key this class is managing, and creates a writable SplFileObject
* for the cache file the key is referring to.
*
* @param string $key The key
* @param boolean $createKey Whether the key should be created if it doesn't exists, or not
* @return boolean true if the cache key could be set, false otherwise
*/
protected function _setKey($key, $createKey = false)
{
$groups = null;
if (!empty($this->_groupPrefix)) {
$groups = vsprintf($this->_groupPrefix, $this->groups());
}
$dir = $this->settings['path'] . $groups;
if (!is_dir($dir)) {
mkdir($dir, 0775, true);
}
$path = new SplFileInfo($dir . $key);
if (!$createKey && !$path->isFile()) {
return false;
}
if (empty($this->_File) || $this->_File->getBaseName() !== $key) {
$exists = file_exists($path->getPathname());
try {
$this->_File = $path->openFile('c+');
} catch (Exception $e) {
trigger_error($e->getMessage(), E_USER_WARNING);
return false;
}
unset($path);
if (!$exists && !chmod($this->_File->getPathname(), (int) $this->settings['mask'])) {
trigger_error(__d('cake_dev', 'Could not apply permission mask "%s" on cache file "%s"', array($this->_File->getPathname(), $this->settings['mask'])), E_USER_WARNING);
}
}
return true;
}
