<?php
namespace Doctrine\Common\Cache;
use MongoCollection;
use MongoDB\Collection;
use const E_USER_DEPRECATED;
use function trigger_error;
/**
* MongoDB cache provider.
*/
class MongoDBCache extends CacheProvider
{
/**
* The data field will store the serialized PHP value.
*/
public const DATA_FIELD = 'd';
/**
* The expiration field will store a MongoDate value indicating when the
* cache entry should expire.
*
* With MongoDB 2.2+, entries can be automatically deleted by MongoDB by
* indexing this field with the "expireAfterSeconds" option equal to zero.
* This will direct MongoDB to regularly query for and delete any entries
* whose date is older than the current time. Entries without a date value
* in this field will be ignored.
*
* The cache provider will also check dates on its own, in case expired
* entries are fetched before MongoDB's TTLMonitor pass can expire them.
*
* @see http://docs.mongodb.org/manual/tutorial/expire-data/
*/
public const EXPIRATION_FIELD = 'e';
/** @var CacheProvider */
private $provider;
/**
* This provider will default to the write concern and read preference
* options set on the collection instance (or inherited from MongoDB or
* MongoClient). Using an unacknowledged write concern (< 1) may make the
* return values of delete() and save() unreliable. Reading from secondaries
* may make contain() and fetch() unreliable.
*
* @see http://www.php.net/manual/en/mongo.readpreferences.php
* @see http://www.php.net/manual/en/mongo.writeconcerns.php
* @param MongoCollection|Collection $collection
*/
public function __construct($collection)
{
if ($collection instanceof MongoCollection) {
@trigger_error('Using a MongoCollection instance for creating a cache adapter is deprecated and will be removed in 2.0', E_USER_DEPRECATED);
$this->provider = new LegacyMongoDBCache($collection);
} elseif ($collection instanceof Collection) {
$this->provider = new ExtMongoDBCache($collection);
} else {
throw new \InvalidArgumentException('Invalid collection given - expected a MongoCollection or MongoDB\Collection instance');
}
}
/**
* {@inheritdoc}
*/
protected function doFetch($id)
{
return $this->provider->doFetch($id);
}
/**
* {@inheritdoc}
*/
protected function doContains($id)
{
return $this->provider->doContains($id);
}
/**
* {@inheritdoc}
*/
protected function doSave($id, $data, $lifeTime = 0)
{
return $this->provider->doSave($id, $data, $lifeTime);
}
/**
* {@inheritdoc}
*/
protected function doDelete($id)
{
return $this->provider->doDelete($id);
}
/**
* {@inheritdoc}
*/
protected function doFlush()
{
return $this->provider->doFlush();
}
/**
* {@inheritdoc}
*/
protected function doGetStats()
{
return $this->provider->doGetStats();
}
}