/**
* {@inheritdoc}
*/
public function clear($key = null)
{
if (is_null($key)) {
$this->redis->flushDB();
return true;
}
$keyString = $this->makeKeyString($key, true);
$keyReal = $this->makeKeyString($key);
$this->redis->incr($keyString);
// increment index for children items
$this->redis->delete($keyReal);
// remove direct item.
$this->keyCache = array();
return true;
}
