Viewing file:  MongoDbSessionHandler.php (4.45 KB) -rw-r--r--
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation\Session\Storage\Handler;
/**
* MongoDB session handler
*
* @author Markus Bachmann <markus.bachmann@bachi.biz>
*/
class MongoDbSessionHandler implements \SessionHandlerInterface
{
/**
* @var \Mongo
*/
private $mongo;
/**
* @var \MongoCollection
*/
private $collection;
/**
* @var array
*/
private $options;
/**
* Constructor.
*
* List of available options:
* * database: The name of the database [required]
* * collection: The name of the collection [required]
* * id_field: The field name for storing the session id [default: _id]
* * data_field: The field name for storing the session data [default: data]
* * time_field: The field name for storing the timestamp [default: time]
*
* @param \Mongo|\MongoClient $mongo A MongoClient or Mongo instance
* @param array $options An associative array of field options
*
* @throws \InvalidArgumentException When MongoClient or Mongo instance not provided
* @throws \InvalidArgumentException When "database" or "collection" not provided
*/
public function __construct($mongo, array $options)
{
if (!($mongo instanceof \MongoClient || $mongo instanceof \Mongo)) {
throw new \InvalidArgumentException('MongoClient or Mongo instance required');
}
if (!isset($options['database']) || !isset($options['collection'])) {
throw new \InvalidArgumentException('You must provide the "database" and "collection" option for MongoDBSessionHandler');
}
$this->mongo = $mongo;
$this->options = array_merge(array(
'id_field' => '_id',
'data_field' => 'data',
'time_field' => 'time',
), $options);
}
/**
* {@inheritDoc}
*/
public function open($savePath, $sessionName)
{
return true;
}
/**
* {@inheritDoc}
*/
public function close()
{
return true;
}
/**
* {@inheritDoc}
*/
public function destroy($sessionId)
{
$this->getCollection()->remove(array(
$this->options['id_field'] => $sessionId
));
return true;
}
/**
* {@inheritDoc}
*/
public function gc($lifetime)
{
/* Note: MongoDB 2.2+ supports TTL collections, which may be used in
* place of this method by indexing the "time_field" field with an
* "expireAfterSeconds" option. Regardless of whether TTL collections
* are used, consider indexing this field to make the remove query more
* efficient.
*
* See: http://docs.mongodb.org/manual/tutorial/expire-data/
*/
$time = new \MongoDate(time() - $lifetime);
$this->getCollection()->remove(array(
$this->options['time_field'] => array('$lt' => $time),
));
return true;
}
/**
* {@inheritDoc]
*/
public function write($sessionId, $data)
{
$this->getCollection()->update(
array($this->options['id_field'] => $sessionId),
array('$set' => array(
$this->options['data_field'] => new \MongoBinData($data, \MongoBinData::BYTE_ARRAY),
$this->options['time_field'] => new \MongoDate(),
)),
array('upsert' => true, 'multiple' => false)
);
return true;
}
/**
* {@inheritDoc}
*/
public function read($sessionId)
{
$dbData = $this->getCollection()->findOne(array(
$this->options['id_field'] => $sessionId,
));
return null === $dbData ? '' : $dbData[$this->options['data_field']]->bin;
}
/**
* Return a "MongoCollection" instance
*
* @return \MongoCollection
*/
private function getCollection()
{
if (null === $this->collection) {
$this->collection = $this->mongo->selectCollection($this->options['database'], $this->options['collection']);
}
return $this->collection;
}
/**
* Return a Mongo instance
*
* @return \Mongo
*/
protected function getMongo()
{
return $this->mongo;
}
}
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