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<?php
namespace Doctrine\Common\Cache;
use MongoBinData;
use MongoCollection;
use MongoCursorException;
use MongoDate;
use const E_USER_DEPRECATED;
use function serialize;
use function time;
use function trigger_error;
use function unserialize;
/**
* MongoDB cache provider.
*
* @internal Do not use - will be removed in 2.0. Use MongoDBCache instead
*/
class LegacyMongoDBCache extends CacheProvider
{
/** @var MongoCollection */
private $collection;
/** @var bool */
private $expirationIndexCreated = false;
/**
* This provider will default to the write concern and read preference
* options set on the MongoCollection 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
*/
public function __construct(MongoCollection $collection)
{
@trigger_error('Using the legacy MongoDB cache provider is deprecated and will be removed in 2.0', E_USER_DEPRECATED);
$this->collection = $collection;
}
/**
* {@inheritdoc}
*/
protected function doFetch($id)
{
$document = $this->collection->findOne(['_id' => $id], [MongoDBCache::DATA_FIELD, MongoDBCache::EXPIRATION_FIELD]);
if ($document === null) {
return false;
}
if ($this->isExpired($document)) {
$this->createExpirationIndex();
$this->doDelete($id);
return false;
}
return unserialize($document[MongoDBCache::DATA_FIELD]->bin);
}
/**
* {@inheritdoc}
*/
protected function doContains($id)
{
$document = $this->collection->findOne(['_id' => $id], [MongoDBCache::EXPIRATION_FIELD]);
if ($document === null) {
return false;
}
if ($this->isExpired($document)) {
$this->createExpirationIndex();
$this->doDelete($id);
return false;
}
return true;
}
/**
* {@inheritdoc}
*/
protected function doSave($id, $data, $lifeTime = 0)
{
try {
$result = $this->collection->update(
['_id' => $id],
[
'$set' => [
MongoDBCache::EXPIRATION_FIELD => ($lifeTime > 0 ? new MongoDate(time() + $lifeTime) : null),
MongoDBCache::DATA_FIELD => new MongoBinData(serialize($data), MongoBinData::BYTE_ARRAY),
],
],
['upsert' => true, 'multiple' => false]
);
} catch (MongoCursorException $e) {
return false;
}
return ($result['ok'] ?? 1) == 1;
}
/**
* {@inheritdoc}
*/
protected function doDelete($id)
{
$result = $this->collection->remove(['_id' => $id]);
return ($result['ok'] ?? 1) == 1;
}
/**
* {@inheritdoc}
*/
protected function doFlush()
{
// Use remove() in lieu of drop() to maintain any collection indexes
$result = $this->collection->remove();
return ($result['ok'] ?? 1) == 1;
}
/**
* {@inheritdoc}
*/
protected function doGetStats()
{
$serverStatus = $this->collection->db->command([
'serverStatus' => 1,
'locks' => 0,
'metrics' => 0,
'recordStats' => 0,
'repl' => 0,
]);
$collStats = $this->collection->db->command(['collStats' => 1]);
return [
Cache::STATS_HITS => null,
Cache::STATS_MISSES => null,
Cache::STATS_UPTIME => $serverStatus['uptime'] ?? null,
Cache::STATS_MEMORY_USAGE => $collStats['size'] ?? null,
Cache::STATS_MEMORY_AVAILABLE => null,
];
}
/**
* Check if the document is expired.
*
* @param array $document
*/
private function isExpired(array $document) : bool
{
return isset($document[MongoDBCache::EXPIRATION_FIELD]) &&
$document[MongoDBCache::EXPIRATION_FIELD] instanceof MongoDate &&
$document[MongoDBCache::EXPIRATION_FIELD]->sec < time();
}
private function createExpirationIndex() : void
{
if ($this->expirationIndexCreated) {
return;
}
$this->expirationIndexCreated = true;
$this->collection->createIndex([MongoDBCache::EXPIRATION_FIELD => 1], ['background' => true, 'expireAfterSeconds' => 0]);
}
}
|
