{@inheritDoc]
public function write($sessionId, $data) {
$this
->getCollection()
->update(array(
$this->options['id_field'] => $sessionId,
), array(
'$set' => array(
$this->options['data_field'] => new \MongoBinData($data, \MongoBinData::BYTE_ARRAY),
$this->options['time_field'] => new \MongoDate(),
),
), array(
'upsert' => true,
'multiple' => false,
));
return true;
}